Discontinuing ChangeLog.

* ChangeLog: renamed to ChangeLog-2009-2015, and discontinued.
Changes will be tracked only in the git commit messages
from now on and not duplicated into the ChangeLog.

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+2015-08-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Discontinuing ChangeLog.
+
+	* ChangeLog: renamed to ChangeLog-2009-2015, and discontinued.
+	Changes will be tracked only in the git commit messages
+	from now on and not duplicated into the ChangeLog.
+
+2015-08-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 111.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version and date.
+
+	* share/txr/stdlib/ver.tl: Likewise.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	C++ upkeep: conversions, clashes, warnings.
+
+	* glob.c (glob_wrap): Fix signed/unsigned comparison.
+
+	* stream.c (make_null_stream): Fix convert beign used
+	where coerce is needed.
+
+	* sysif.c (dup_wrap): Fix use of C++ new keyword.
+
+2015-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	C++ static forward issue.
+
+	* lib.h (static_forward, static_def): New macros
+	for dealing with C++ static forward declaration problem.
+
+	* syslog.c (syslog_strm_ops): Use static
+	forward macros.
+
+2015-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	C++ upkeep: resolve multiple definitions of fun_k.
+
+	* eval.c (fun_k): Global definition removed.
+	(eval_init): Do not initialize fun_k here.
+
+	* filter.c (fun_k): Definition removed.
+	(filter_init): Do not initialize fun_k.
+
+	* filter.h (fun_k): Declaration removed.
+
+	* lib.c (fun_k): Defined in this file now.
+	(obj_init): Initialize fun_k here.
+
+	* lib.h (fun_k): Declare here.
+
+2015-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (SRCS): When top_srcdir is blank, elide the entire
+	--work-tree argument to git. On Cygwin, git throws a strange error
+	message when --work-tree is given a blank argument.
+
+2015-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c: Include <wctype.h> header for iswprint.
+	Needed on Cygwin.
+
+2015-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* sysif.c (w_lstat): If we don't have S_IFLINK, implement
+	w_lstat as an alias to w_stat. This helps build on MinGW.
+
+2015-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Change to different exception for debugger quit.
+
+	* debug.c (debug_quit_s): New global variable.
+	(debug): Throw debug-quit, not query-error.
+	(debug_init): Initialize debug_quit_s.
+
+2015-08-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (help): Rearrange menu. Show missing quit command.
+
+2015-08-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Suppress debug stepping into auto-loaded library code.
+
+	* debug.c (debug_set_state, debug_restore_state): New functions.
+
+	* debug.h (debug_state_t): New type.
+	(debug_set_state, debug_restore_state): Declared, and defined
+	as dummy macros in non-debug-support build.
+
+	* lisplib.c (opt_dbg_autoload): New global variable.
+	(lisplib_try_load): Disable or enable debugging around
+	library loading based on opt_dbg_autoload option.
+
+	* lisplib.h (opt_dbg_autoload): Declared.
+
+	* txr.c (help): List --debug-autoload option.
+	(no_dbg_support): New static function to avoid repeated code.
+	(txr_main): Add debugger-autoload option. Change duplicate no debug
+	support error messages into calls to no_dbg_support.
+
+	* txr.1: Document --debug-autoload
+
+2015-08-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): Bugfix: debugger long option nonfunctional.
+
+2015-08-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Better diagnosis for loose @ forms.
+
+	* eval.c (op_meta_error): New static function.
+	(eval_init): Register sys:var and sys:expr as operators
+	that throw error.
+
+	* parser.y (sym_helper): Take parser_t instead of scanner_t
+	argument so we have access to the name and line number.
+	Obtain scanner internally from parser. Add source location
+	info to (sys:var ...) form.
+	(symhlpr): Retarget macro to pass parser rather than scanner to
+	sm_helper.
+
+2015-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	New filesystem object testing functions.
+
+	* lisplib.c (path_test_set_entries, path_test_instantiate):
+	New static functions.
+	(dlt_register): Registered new functions to dl_table.
+
+	* txr.1: Documented new functions.
+
+	* share/txr/stdlib/path-test.tl: New file.
+
+2015-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding support for uid and gid manipulation.
+
+	* configure: Added check for geteuid and related functions.
+
+	* sysif.c (getuid_wrap, geteuid_wrap, getgid_wrap, getegid_wrap,
+	getgroups_wrap, setuid_wrap, seteuid_wrap, setgid_wrap, setegid_wrap):
+	New static functions.
+	(sysif_init): Register intrinsics getuid, geteuid, getgid,
+	getegid, getgroups, setuid, seteuid, setgid, setegid.
+
+	* txr.1: Documented new functions.
+
+2015-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (system_error_s): New symbol variable.
+	(obj_init): Initialize new variable.
+
+	* lib.h (system_error_s): Declared.
+
+	* unwind.c (uw_init): Register system-error exception type.
+
+2015-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (stream_init): Register get-indent-mode, set-indent-mode,
+	test-set-indent-mode, get-indent, set-indent, inc-indent
+	and width-check intrinsic functions. Register indent-off,
+	indent-data and indent-code variables.
+
+	* txr.1: Documented stream output indentation API.
+
+2015-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (width_check): Just use the public
+	put_char function; no need to manipulate column
+	or call put_indent.
+
+2015-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Better diagnostic in funcall family of functions.
+
+	* lib.c (wrongargs): New static function.
+	(funcall, funcall2, funcall2, funcall3, funcall4):
+	Use wrongargs.
+
+2015-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (do_eval): Bugfix: though last_form_evaled is
+	saved and restored around the execution of a special operator,
+	it is never set the current form.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_args): Use new ~! for proper indentation
+	of multi-line context form.
+	(apply): Use ~! for proper indentation of function code.
+
+	* unwind.c (uw_throw): Use ~! for proper indentation of code.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (put_string): In indent mode, put_string has
+	to process all the characters as if by put_char,
+	(which we now do literally that way).
+	(set_indent_mode): Bugfix: no longer reset the column
+	to zero when turning off indent mode. This is wrong since
+	streams do column counting all the time.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Implement ~! format directive for indentation.
+	Allow negative widths to be specified with a leading minus sign,
+	so that we can indent to the left.
+
+	* txr.1: Document ~! format directive.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (put_string, put_char): Do not put out the indentation
+	immediately after outputting a newline. Rather, delay the output of the
+	indentation until some output occurs at column zero.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (inc_indent): If a negative indentation increment goes below
+	zero, clamp it at zero.
+	(set_indent): Clamp indentation value to zero.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vormat): Bugfix: when width specified as *
+	meets a negative argument, the width should be treated
+	as positive and the field left aligned. Instead, the
+	width is treated as zero.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (string_out_put_string): Do not return nil when
+	buffer calculations overflow, but throw exception.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Remove useless return values and checks.
+
+	* stream.c (vformat_align_pre, vformat_align_post): Change to void
+	return.  Do not check return value of put_char.
+	(vformat_num, vformat_str): Change to void return. Do not check return
+	value of vformat_align_pre, vformat_aign_post or put_char.
+	(vformat): Do not check return value of vformat_str or vformat_num.
+	nilout exit point no longer needed.
+	(put_string): Do not intercept return value of ops->put_string.
+	Return t.
+	(put_char): Do not intercept return value of ops->put_char.
+	Do not check return value of put_indent. Return t.
+
+	* txr.1: Document t return of put-char, put-byte and put-string.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (func_get_name): New function.
+	(bind_args): Include the entire context form in argument
+	mismatch errors.
+	(apply): Include the function name, or else source code
+	if it has no name, in argument mismatch erors.
+	(eval_init): Register func-get-name intrinsic.
+
+	* eval.h (func_get_name): Declared.
+
+	* txr.1: Documented func-get-name.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (force): Default the new second argument of source_loc_str.
+	(eval_error): Derive location of error from
+	the last_form_evaled, if form doesn't have it.
+	(eval_init): Re-register source-loc-str as binary with an optional arg.
+
+	* match.c (debuglf, sem_error, file_err, typed_error): Default new
+	argument of source_loc_str.
+
+	* parser.h (source_loc_str): Declaration updated.
+
+	* parser.l (source_loc_str): Take second argument which specifies
+	alternative value if the source loc info is not found.
+
+	* unwind.c (uw_throw): Simplify code thanks to source_loc_str
+	default argument.
+
+	* txr.1: Document new argument of source-loc-str.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_revget): New function.
+
+	* hash.h (hash_revget): Declared.
+
+	* eval.c (eval_init): Registered hash-revget intrinsic.
+
+	* txr.1: Documented hash-revget.
+
+2015-08-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (indent_mode_put_string): Function removed,
+	logic hoisted into put_string.
+	(put_string, put_char): Always count column, indent mode or not.
+
+	* tests/009/json.expected: Updated.
+
+2015-08-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Define TXR_DBG macro when compiling debug build.
+
+	* Makefile (dbg/%.o): Pass $(DBG_ONLY_FLAGS) to COMPILE_C_WITH_DEPS
+	recipe macro.
+
+	* configure (debug_only_flags): New macro.
+	(gen_config_make): Generate DBG_ONLY_FLAGS.
+	Add debug-only-flags to usage help text.
+
+2015-08-03  Christopher Meng  <i@cicku.me>
+
+	Custom linker flags support.
+
+	* Makefile (PLATFORM_FLAGS): Rename to PLATFORM_CFLAGS.
+	(LDFLAGS): New variable. Includes -lm and PLATFORM_CFLAGS.
+	(LINK_PROG): Use $(LDFLAGS) instead of -lm.
+
+	* configure (platform_flags): Renamed to platform_cflags.
+	(platform_ldflags): New variable.
+	(gen_config_make): Rename PLATFORM_CFLAGS and generate
+	PLATFORM_LDFLAGS.
+	Usage help text updated.
+
+2015-08-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Switching some globals to lexical and changing some names.
+
+	* arith.c (arith-init): Changing *flo-...* from special to
+	lexical, and adding un-earmuffed variants. The earmuffed
+	versions are obsolescent.
+	Adding %pi% and %e% global lexicals. Earmuffed versions are
+	also made global lexical, and obsolescent.
+
+	* eval.c (lookup_global_var, lookup_global_var_l): New functions.
+	(lookup_var): Uses lookup_global_var.
+	(reg_varl): New function.
+	(reg_var): Uses reg_var.
+	(eval_init): Register global lexicals user-package, system-package
+	and keyword-package. Old symbols with earmuffs are obsoleted,
+	and also turned into global lexicals.
+	(top-vb, top-fb): Changed to lexical.
+
+	* eval.h (lookup_global_var, lookup_global_var_l, reg_varl):
+	Declared.
+
+	* genvim.txr: Scan ver.tl so that the lib-version variable
+	is included. Extract reg_varl calls.
+
+	* glob.c (glob_init): glob-err and other variables made lexical.
+
+	* lib.c (get_user_package, get_system_package, get_keyword_package):
+	Use lookup_global_var_l to avoid searching dynamic scope for
+	lexicals which cannot be dynamically rebound.
+
+	* share/txr/stdlib/ver.tl (lib-version): New global lexical variable.
+	(*lib-version*): Turned lexical. Obsolescent.
+
+	* signal.c (sig-init): sig-* variables turned lexical.
+
+	* sysif.c (sysif-init): s-*, poll-* and w-* variables turned lexical.
+
+	* syslog.c (syslog-init): log-* variables turned lexical.
+
+	* txr.c (sysroot-init): stdlib and *txr-version* variables turned
+	lexical. txr-version variable added, and *txr-version* is
+	obsolescent.
+	(txr-main): self-path variable added. *self-path* turns lexical
+	and is obsolescent.
+
+	* txr.1: Documentation updated. Lexical variables not referred
+	to as special. Special variables referred to as special.
+
+
+2015-08-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): Bugfix: register *args-full*, the variable
+	described in the documentation! We keep *full-args* for backward
+	compatibility, as an obsolescent feature.
+
+2015-08-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Introducing global lexicals: defvarl, defparml.
+
+	* eval.c (defvarl_s, defparm_s, defparml_s, sys_mark_special_s): New
+	symbol variables.
+	(mark_special): Return val rather than void, since it's hoisted
+	into Lisp domain now with func_n1.
+	(op_defvar): Renamed to op_defvarl, and doesn't call mark_special.
+	defvarl is now the special form for defining variables, and special
+	marking is an embellishment added by macros.
+	(me_defparm): Renamed to me_def_variable. Handles defvar, defparm
+	and defparml.
+	(do_expand): Expand defvarl, rather than defvar.
+	(eval_init): Intern defvarl, defparm, defparml and mark-special
+	symbols, and initialize corresponding globals.
+	Register defvarl special operator, retiring defvar.
+	Register defparm to me_def_variable, and register defvar and
+	defparml to the same.
+
+	* txr.1: Document support for global lexical scopes and the
+	new macros.
+
+2015-08-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support lstat and fstat.
+
+	* stream.h (statf): Declaration removed.
+
+	* sysif.c (w_stat): Function takes val instead of const wchar_t *
+	as leftmost argument.
+	(w_lstat, w_fstat): New static functions, with same interface as w_stat.
+	(stat_to_list, stat_impl): New static functions.
+	(statp, statl): New static functions.
+	(statf): Function removed, name re-used for new static function.
+	(sysif_init): stat intrinsic registered to statp function, not statf.
+	lstat and fstat intrinsics registered to statl and statf.
+
+	* txr.1: Documented lstat and fstat.
+
+2015-08-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Pass pretty flag to cobj print operation.
+
+	* hash.c (hash_print_op): Take third argument,
+	and call cobj_print_impl rather than cobj_print.
+
+	* lib.c (cobj_print_op): Take third argument.  The object class is
+	* printed with obj_print_impl.
+	(obj_print_impl): Static function becomes extern.  Passes its pretty
+	flag argument to cobj print virtual function.
+
+	* lib.h (cobj_ops): print takes third argument.
+	(cobj_print_op): Declaration updated.
+	(obj_print_impl): Declared.
+
+	* regex.c (regex_print): Takes third argument, and ignores it.
+
+	* stream.c (stream_print_op, stdio_stream_print, cat_stream_print):
+	Take third argument, and ignore it.
+
+	* stream.h (stream_print_op): Declaration updated.
+
+2015-08-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (special_p): Function renamed to special_var_p.
+	(expand_opt_params_rec, expand_vars): Follow rename of special_p.
+	(eval_init): Register special-operator-p and special-var-p
+	intrinsics.
+
+	* txr.1: Document special-operator-p and special-var-p.
+
+2015-08-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Big TXR Lisp documentation rearrangement.
+
+	* txr.1: Numerous sections moved around. Miscellaneous formatting
+	and wording fixes. New sections under TXR Lisp intro section.
+
+2015-07-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	string_output renamed to string_out
+
+	* stream.c (struct string_output): Renamed to string_out.
+	(string_out_stream_destroy, string_out_byte_callback,
+	string_out_put_char, strnig_out_put_string, string_out_put_byte,
+	make_string_output_stream, get_string_from_stream): Follow rename.
+
+2015-07-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	Simplify type check code in stream module.
+
+	* stream.c (get_string_from_stream, get_list_from_stream,
+	stream_set_prop, stream_get_prop, close_stream, get_line,
+	get_char, get_byte, unget_char, unget_byte, put_string,
+	put_char, put_byte, flush_stream, seek_stream): Use cobj_handle and
+	cobj_ops instead of type_check and type_assert.
+	(get_indent_mode, test_set_indent_mode, set_indent_mode,
+	get_indent, set_indent, inc_indent, width_check): Use cobj_handle
+	and cobj_ops instead of stream->co.handle and stream->co.ops
+	for safety.
+
+	(vformat, format): Use class_check instead of type_check and
+	type_assert.
+
+2015-07-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	Multi-line, indented printing of structure.
+
+	* eval.c (op_error): New static function.
+	(macro_form_p, fboundp): Static to external.
+	(special_operator_p): New function.
+	(eval_init): Register macrolet and symacrolet to op_error.
+	These are recognized and processed by expand, but we want
+	them in the op table so they are reported by special_operator_p.
+
+	* eval.h (fboundp, macro_form_p, special_operator_p): Declared.
+
+	* hash.c (print_key_val): Break long lines on spaces
+	between pairs with stream_width_check.
+	(hash_print_op): Implement split and indented printing.
+
+	* lib.c (obj_print_impl): New static function, resulting
+	from a merge of obj_print and obj_pprint. Fixes some
+	wrong-way recursion bugs: obj_pprint recursed into obj_print
+	in some places. Adds support for multi-line printing of
+	vectors and lists, with indentation using the new
+	interfaces in streams.
+
+	* stream.c (strm_base_init): Update initializer.
+	(put_indent, indent_mode_put_string): New static functions.
+	(put_string): Use indent_mode_put_string in either of the
+	two indent modes.
+	(put_char): Implement indent mode.
+	(get_indent_mode, test_set_indent_mode,
+	set_indent_mode, get_indent, set_indent,
+	inc_indent, width_check): New functions.
+
+	* stream.h (enum indent_mode): New.
+	(struct strm_base): indent_on member becomes indent_mode.
+	New members data_width and code_width.
+	(get_indent_mode, test_set_indent_mode,
+	set_indent_mode, get_indent, set_indent,
+	inc_indent, width_check): Declared.
+
+	* tests/009/json.expected: Updated.
+
+	* tests/010/seq.expected: Likewise.
+
+	* tests/011/macros-2.expected: Likewise.
+
+2015-07-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c, utf8.c: Fix bad indentation introduced in whitespace
+	fix on 2013-08-09.
+
+2015-07-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	Correction to COBJ initialization pattern.
+
+	In fact, the previosuly documented process is not correct and still
+	leaves a corruption problem under generational GC (which has been the
+	default for some time).
+
+	* HACKING: Document flaw in the initialization pattern previously
+	thought to be correct, and show fix.
+
+	* hash.c (copy_hash): Fix instance of incorrect pattern.
+
+	* regex.c (regex_compile): Likewise.
+
+2015-07-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Restore accidentally deleted document title.
+
+2015-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Deriving streams from the same base, so
+	we can give streams some common slots.
+
+	* stream.c (strm_base_init, strm_base_cleanup, strm_base_mark,
+	stream_destroy_op, stream_mark_op): New functions.
+	(null_ops): Switch to stream_destroy_op and stream_mark_op.
+	(make_null_stream): Associate a strm_base instance with the
+	cobj handle rather than a null pointer.
+	(struct stdio_handle): Inherit struct strm_base.
+	(stdio_stream_destroy): Clean up the strm_base part.
+	(stdio_stream_mark): Mark the strm_base part.
+	(make_stdio_stream_common): Initialize the strm_base part.
+	(struct dir_handle): Inherit struct strm_base.
+	(dir_destroy): Clean up the strm_base part.
+	(dir_mark): Mark the strm_base part.
+	(make_dir_stream): Initialize the strm_base part.
+	(struct string_in): New structure. Replaces ad-hoc cons
+	cell used for string input streams.
+	(string_in_stream_mark): Mark new structure.
+	(string_in_get_line, string_in_get_char, string_in_unget_char,
+	string_in_get_prop, string_in_get_error, make_string_input_stream):
+	Convert to new structure.
+	(string_in_ops): Switch to stream_destroy_op.
+	(struct byte_input): Inherit struct strm_base.
+	(byte_in_stream_destroy): No need to check handle for null.
+	No need to set handle to null after freeing: gc does it.
+	Clean up the strm_base part.
+	(byte_in_ops): Switch to stream_mark_op.
+	(make_string_byte_input_stream): Initialize the strm_base part.
+	(struct string_output): Inherit struct strm_base.
+	(string_out_stream_destroy): No need to check handle for null
+	since the logic elsewhere has changed.
+	Clean up the strm_base part.
+	No need to set handle to null.
+	(string_out_ops): Switch to stream_mark_op.
+	(make_string_output_stream): Initialize the strm_base part.
+	(get_string_from_stream): Don't free the handle.
+	Null out the buffer so->buf whose ownership passes to the string.
+	(struct strlist_out): New structure. Replaces ad-hoc cons cell
+	used for string list output stream.
+	(strlist_mark): Renamed to strlist_out_mark. Mark the strm_base
+	part.
+	(strlist_out_put_string, strlist_out_put_char,
+	make_strlist_output_stream, get_list_from_stream):
+	Convert to new structure.
+	(strlist_out_ops): Switch to stream_destroy_op.
+	Follow rename of strlist_mark.
+	(struct cat_strm): New structure, replacing ad-hoc list pointer
+
+2015-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (finalize): Null out cobj handle after calling the
+	destructor. This can catch some use-after-free errors.
+
+2015-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (common_destroy): Function removed.
+	(stdio_stream_destroy, dir_destroy): Call close_stream directly.
+
+2015-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c: Rearranging definitions and declarations so that
+	code for each stream type is together. Moving catenated
+	streams above utility functions, so they are together with
+	other stream definitions.
+
+2015-07-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Centered fields in format.
+
+	* stream.c (enum align): New enum.
+	(vformat_align_pre, vformat_align_post): New static functions.
+	(vformat_num, vformat_str): Argument left renamed to align, and changed
+	to enum align. vformat_align_pre and vformat_align_post are called to
+	generate the correct padding for left, center and right alignment.
+	(vformat): Two-valued local variable left turned into three-valued
+	align. The ^ prefix on the width field is recognized.
+
+	* txr.1: Documented ^ width prefix.
+
+2015-07-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* share/txr/stdlib/txr-case.tl (txr-case-impl): Bugfix,
+	handle nil case in recursion.
+
+2015-07-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: In introduction of user-defined places, mentioning
+	placelet as a way of writing place update macros.
+	Example added under placelet.
+
+2015-07-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 110.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version and date.
+
+	* share/txr/stdlib/ver.tl: Likewise.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-07-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Improved highlighting of items in quasiquote.
+	Lists can be spliced and quoted. Metanums and metavars can
+	be prefixed by multiple @'s.
+
+2015-07-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Do not refer to installed code via stdlib.
+	Refer to source tree.
+
+2015-07-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Quasiliteral tests.
+
+	* tests/012/quasi.expected: New file.
+
+	* tests/012/quasi.tl: New file.
+
+2015-07-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (tst/tets/012/%): Disable --gc-debug for
+	tests in this directory.
+
+2015-07-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/012/ifa.tl: New test for it being bound to a place.
+
+2015-07-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: place-form-p must expand place macros.
+
+	* share/txr/stdlib/place.tl (place-form-p): Take
+	environment parameter. Expand the place form using sys:pl-expand.
+
+	* share/txr/stdlib/ifa.tl (ifa): Pass environment
+	to place-form-p.
+	(nthcdr): Pass environment down to place-form-p.
+
+2015-07-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_quote): Improved diagnostic.
+
+2015-07-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Set up blank top_srcdir if building in source directory.
+
+	This means short, relative names are used for C source files when
+	compiling in the source directory.
+
+	* Makefile (CFLAGS): Exclude -iquote $(top_srcdir) arguments
+	if top_srcdir is blank. Remove slash after $(top_srcdir),
+	since the variable includes it now, if its value is not blank.
+	(SRCS, ABBREV, opt/%-win.o, lex.yy.c, y.tab.c, install): Remove slash
+	after $(top_srcdir).
+	(dbg/%.o, opt/%.o): Only include rules for depending
+	on $(top_srcdir)%.c prerequisite if top_srcdir is not blank.
+	In the blank case, the rules are redundant.
+
+	* configure: if configuring in the root of the source tree,
+	establish top_srcdir as blank, otherwise establish is as
+	an absolute path with a trailing slash.
+
+2015-07-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Split off test macros from ifa.tl into common file.
+
+	* Makefile (TESTS_OUT): Don't use find to hunt down tests;
+	but rather wildcard. This way common.tl is not mistakenly
+	identified as an independent test file.
+
+	* tests/012/ifa.tl: Removed test code, placed in new file
+	which is loaded.
+
+	* tests/common.tl: New file.
+
+2015-07-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixes for building in separate dir.
+
+	* Makefile (CFLAGS): Search for mpi header in $(top_srcdir).
+	(ABBREV): Remove top_srcdir prefix from source names.
+	(dbg/%.o, opt/%.o): Extra set of pattern rules for searching
+	for prerequisites in $(top_srcdir) where primary C sources
+	are found and in the local dir where some generated C is found.
+	This way we don't rely on VPATH.
+	(opt/%.res): Bogus target removed.
+	(VPATH): Removed in favor of explicitly referencing $(top_srcdir).
+	Was causing problems for tests.
+	(lex.yy.c, y.tab.c): Prerequisites referenced in $(top_srcdir).
+
+2015-07-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (grammar): Do not allow unescaped newline in
+	word list literals and word list quasiliterals, except
+	in <= 109 compatibility mode. An escaped newline in
+	these literals, together with surrounding whitespace,
+	now produces a single space, except in <= 109
+	compatibility mode.
+
+	* txr.1: Documented new rules for WLL's and QLL's,
+	and added compatibility notes.
+
+2015-07-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Scan cadr.c, cadr.tl, with-resources.tl, txr-case.tl.
+	Remove hard-coded txr-case symbols. Recognize operators registered
+	with in-line intern.
+
+2015-07-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding with-resources macro.
+
+	* share/txr/stdlib/with-resources.tl: New file.
+
+	* lisplib.c (with_resource_set_entries, with_resources_instantiate):
+	New static functions.
+	(lisplib_init): Register new functions under dlt_register.
+
+	* txr.1: Document with-resources.
+
+2015-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding nthcdr as accessor.
+
+	* eval.c (eval_init): Register nthcdr function.
+
+	* lib.c (nthcdr): New function.
+
+	* lib.h (nthcdr): Declared.
+
+	* share/txr/stdlib/place.tl (nthcdr): New defplace.
+
+	* txr.1: Documented.
+
+2015-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improve bad argument diagnosis for place macros.
+
+	* eval.c (op_mac_param_bind): New static function.
+	(eval_init): Register mac-param-bind operator.
+
+	* share/txr/stdlib/place.tl (define-place-macro): Use
+	mac-param-bind inside a lambda instead of tb macro.
+
+	* txr.1: Document mac-param-bind.
+
+2015-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing second through tenth as places.
+
+	* eval.c (eval_init): Register second through tenth as intrinsic.
+
+	* gencadr.txr: New cadr.c changes encoded.
+
+	* lib.c (second, third, fourth, fifth, sixth): Functions
+	reimplemented using ref, so they are much more efficient
+	for vectors and strings.
+	(seventh, eighth, ninth, tenth): New functions.
+
+	* lib.h (seventh, eighth, ninth, tenth): Declared.
+
+	* share/txr/stdlib/place.tl: place macros defined for
+	second through tenth.
+
+	* txr.1: Documented.
+
+2015-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lisplib.c (place_set_entries): Add *place-macro* and
+	define-place-macro to list of names.
+
+	* share/txr/stdlib/place.tl (*place-macro*): New global hash.
+	(sys:tigger-load, sys:pl-expand): New functions.
+	(call-update-expander, call-clobber-expander, call-delete-expander):
+	Recognize and expand place macros.
+	(define-place-macro): New macro.
+	(first, rest): Places redefined using define-place-macro, replacing
+	the old hack of copying the expanders from one table entry to another.
+
+	* txr.1: Documented place macros.
+
+2015-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_print, obj_pprint): Bugfix: incorrect
+	value returned when printing dwim forms, due to
+	mutating the obj variable.
+
+2015-07-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing caar, cadr, cdar and friends.
+
+	* lib.c (init): Call cadr_init.
+
+	* lisplib.c (dl_table, set_dlt_entries, dlt_register): Externalize.
+
+	* lisplib.h (dl_table, set_dlt_entries, dlt_register): Declared.
+
+	* Makefile (OBJS): Add cadr.o.
+
+	* cadr.c: New file.
+
+	* cadr.h: New file.
+
+	* gencadr.txr: New file.
+
+	* share/txr/stdlib/cadr.tl: New file.
+
+	* txr.1: Document cadr accessors.
+
+2015-07-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* share/txr/stdlib/place.tl (defplace cdr): Change deletion
+	semantics so that (del (cdr x)) is symmetric with (del (car x)).
+
+	* txr.1: Update documentation.
+
+2015-07-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register new split function.
+
+	* lib.c (split_func): New static function.
+	(partition_split_common): New static function, based on
+	on contents of partition function.
+	(partition): Now a wrapper around partition_split_common.
+	(split): New function.
+
+	* lib.h (split): Documented.
+
+	* txr.1: Documented split.
+
+2015-07-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.c (open_txr_file): Bugfix: the name of the parsed
+	stream should be the resolved name, not the abstract original,
+	so that error messages correlate to the file.
+
+2015-07-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* share/txr/stdlib/ifa.tl (ifa): Use placelet to
+	allow "it" to be mutable when it denotes a place form.
+
+2015-07-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* share/txr/stdlib/place.tl (place-form-p): New function.
+
+	* lisplib.c (place_set_entries): Add place-form-p to list of names.
+
+2015-07-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Expand away sys:lisp1-value based on lexical info.
+
+	* eval.c (sys_lisp1_value_s): New global symbol variable.
+	(expand_lisp1_value): New static function.
+	(do_expand): Use expand_lisp1_value.
+	(eval_init): Initialize sys_lisp1_value_s.
+
+2015-07-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Let's have placelet and placelet*.
+
+	* share/txr/stdlib/place.tl (placelet*): New macro.
+
+	* lisplib.c (place_set_entries): Add placelet* to list of names.
+
+	* txr.1: Updated to document placelet* and fix mistakes.
+
+2015-07-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* share/txr/stdlib/place.tl (defplace dwim): Eliminate
+	ogetter-sym variable for caching the sequence; use the getter
+	for the sequence place to access it. Again, this is for placelet,
+	where the caching is visible. Another way to fix this is to
+	clobber the cache variable when updating the sequence place.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register bindable as intrinsic.
+
+	* txr.1: Documented.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	New placelet macro.
+
+	* lisplib.c (place_set_entries): Add placelet to list of names.
+
+	* share/txr/stdlib/place.tl (sys:placelet1, placelet): New macros.
+	(defplace dwim): Do not retrieve the
+	place's value into a local variable and have the getter
+	expand to that variable. Rather, have the getter retrieve the
+	value. A getter that refers to a cached copy breaks
+	the semantics of placelet, and any place operator which can
+	evaluate the location after it is stored.
+
+	* txr.1: Documented placelet.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Handle setting of parse name through prime_parser.
+
+	* parser.c (prime_parser): Take name as argument,
+	and install it into parser.
+	(lisp_parser): Pass name to parse, instead of setting it
+	in the parser object.
+
+	* parser.y (parse): Take name as argument and pass
+	down to prime_parser.
+
+	* parser.h (prime_parser, parse): Declarations updated.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix wrong name reported for errors in first top-level form.
+
+	* parser.c (read_eval_stream): Get name of original stream,
+	and pass that down to lisp_parse as the name argument.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix off by one error line numbers for .tl files.
+
+	* parser.c (read_eval_stream): Add terminating newline to
+	the first line that was examined for hash bang.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Remove unused "primer" member from parser_t.
+
+	* parser.c (parser_mark, parser_common_init): Remove reference to primer.
+	(parser): Don't take primer argument, remove reference to member.
+	(ensure_parser): Don't take primer argument, don't pass to parser
+	function.
+	(lisp_parse): Don't pass primer string to ensure_parser.
+
+	* parser.h (primer_t): Remove primer member.
+	(parser): Declaration updated.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: lexer loses unmatched "hold char" between top-level forms.
+
+	Test case: file containing 4(prinl 3). Scanner consumes 4 and (.
+	The ( is lost when the scanner is reset for the next call to yyparse,
+	resulting in jut prinl being read and interpreted as a variable.
+
+	* parser.c (prime_parser): If present, append hold byte to priming
+	string. Takes parser_t * instead of parser, and returns void now.
+
+	* parser.l (reset_scanner): Now returns int value, the value
+	of the scanner's yy_hold_char variable which is nonzero when
+	the scanner is hanging on to an unmatched byte of input.
+
+	* parser.h (reset_scanner, prime_parser): Declarations updated.
+
+	* parser.y (parse): Pass hold byte returned by reset_scanner to
+	prime_parser.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (byte_in_unget_byte): Wrong function name in error message.
+
+2015-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix unget-byte and unget-char on catenated streams.
+
+	* stream.c (cat_unget_byte, cat_unget_char): Recursive
+	call to unget_byte and unget_char with reversed arguments.
+
+2015-07-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Parser cleanup: embed scanner in parser.
+
+	* parser.c (parser_destroy): New GC finalizer static function.
+	(parser_ops): Register parser_destroy.
+	(parser_common_init): New function, shared by parse and parse_once.
+	Initializes embedded scanner.
+	(parser_cleanup): New function, shared by parse_once and
+	parser_destroy.
+	(parser): Use parser_common_init.
+
+	* parser.h (parser_t): New member, yyscan.
+	(reset_scanner, parser_common_init): Declared.
+
+	* parser.l (reset_scanner): New function.
+
+	* parser.y (parse_once): Use parser_common_init, and
+	thus perform only a few initializations. Do not
+	define scanner as a local variable.
+	(parse): Call reset_scanner instead of
+	yylex_init since the scanner is being reused,
+	and for the same reason do not call yylex_destroy.
+	GC will do that now.
+
+2015-07-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: define-modify-macro not registered for auto-loading.
+
+	* lisplib.c (place_set_entries): Add define-modify-macro to
+	list of names.
+
+2015-07-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: allow @1 in brace variables.
+
+	* parser.l (grammar): Scan a METANUM token in the
+	BRACED state also. This allows us to correctly
+	reference op arguments in a quasiliteral, as in
+	`foo @{@1 [1..2] ","} bar`.
+
+2015-07-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improved printing of stream objects.
+
+	* stream.c (null_stream_print): Static function removed.
+	(stream_print_op): New function. Prints stream's name and address.
+	(null_get_prop): Pull stream name from strm_ops structure
+	rather than hard-coding to "null-stream".
+	(null_ops, stdio_ops, tail_ops, pipe_ops, string_in_ops,
+	byte_in_ops, string_out_ops, strlist_out_ops, dir_ops,
+	cat_stream_ops): Use stream_print_op in place of cobj_print_op.
+	Initialize name.
+	(stdio_stream_print): Use name from ops structure,
+	and include object address.
+	(string_in_get_prop): Likewise.
+	(cat_stream_print): Likewise.
+
+	* stream.h (struct strm_ops): New member, name.
+	(strm_ops_init): Initialize name.
+	(stream_print_op): Declared.
+
+	* syslog.c (syslog_strm_ops): Use stream_print_op. Initialize name.
+
+2015-07-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix in printed rep of stdio stream.
+
+	* stream.c (stdio_stream_print): Wrong way test on h->pid;
+	if it is nonzero it must be printed. Was printed wrong:
+	argument of integer type passed to ~s which expects a val.
+
+2015-07-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Clarify clear-error and flush return value.
+
+	* stream.c (stdio_clear_error): Return the prior value of h->err.
+	Do not inspect feof(h->f) or ferror(h->f); just clear the error
+	status of the stream.
+	(stdio_close): Set h->err from errno if fclose failed.
+	(dir_clear_error): Return prior value of h->err.
+
+	* txr.1: Document return value convetion for clear-error,
+	and flush-stream.
+
+2015-07-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Tightening behavior for unimplemented stream ops.
+
+	In many cases, if a stream operation is not applicable to a stream, it
+	is not appropriate to just do nothing and return nil. An error
+	must be thrown.
+
+	* stream.c (unimpl, unimpl_put_string, unimpl_put_char,
+	unimpl_put_byte, unimpl_get_line, unimpl_get_char, unimpl_get_byte,
+	unimpl_unget_char, unimpl_unget_byte, unimpl_seek, null_put_string,
+	null_put_char, null_put_byte, null_get_line, null_get_char,
+	null_get_byte, null_close, null_flush, null_seek, null_set_prop,
+	null_get_error, null_get_error_str, null_clear_error): New
+	static functions.
+	(fill_stream_ops): New function.
+	(null_ops): Use null_put_string, etc., instead of null pointers.
+	(stdio_clear_error, dir_clear_error, cat_clear_error): Return value now
+	indicating whether an error was cleared.
+	(stream_set_prop, stream_get_prop, real_time_stream_p, close_stream,
+	get_error, get_error_str, clear_error, get_line, get_char, get_byte,
+	unget_char, unget_byte, put_string, put_char, put_byte,
+	flush_stream): Do not test whether a function in the ops table
+	is defined; just call it, and return its value.
+	(stream_init): Call fill_stream_ops on all stream operation
+	structures so any null pointers are defaulted to appropriate
+	functions.
+
+	* stream.h (struct strm_ops): clear_error gets return value.
+	(fill_stream_ops): Declared.
+
+	* syslog.c (syslog_init): Call fill_stream_ops on syslog_strm_ops.
+
+2015-07-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Reduce regex duplication in genvim.txr.
+
+	* genvim.txr (bs, hex, at, alpha, alnum, dig, oct, chesc, glyph):
+	New variables.
+	*(txr_error, txr_atat, txr_comment, txr_contin, txr_char,
+	txr_regdir, txr_variable, txr_splicevar, txr_stresc, txr_numesc,
+	txr_regesc, txr_chr, txr_num, txr_badnum,txr_ident,
+	txr_braced_ident): Use regex definitions.
+
+2015-07-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Syntax highlighting fixes: characters, variables, identifers.
+
+	* genvim.txr (txr_variable, txr_splicevar, txr_bracevar): Weren't being
+	generated into tl.vim. Moved to a common section.
+	(txr_nested_error): Relocate above other matches.
+	(txr_ident): Fixed not to match tokens starting with #.
+
+2015-07-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Simplify double plass over BODY into single pass.
+
+2015-07-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow op arguments like @1 to be places.
+
+	* share/txr/stdlib/place.tl: Introducing new defplace
+	for (sys:var ...) which is treated as if it were a symbol,
+	in anticipation of the op/do macro placing that syntax
+	with a symbol.
+
+2015-07-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support trailing semicolon after hex/octal characters.
+
+	* parser.l (%option): Remove nounput option since we need
+	yyunput.
+	(grammar): Rule for matching hex and octal escape in SPECIAL
+	state recognizes optional semicolon. In 109 compatibility,
+	this is pushed back into the stream, otherwise consumed.
+
+	* txr.1: Updated documentation, including compat notes.
+
+	* genvim.txr (txr_char): Include optional semicolon in
+	match. Corrected some errors where 8 and 9 were being
+	included as matches for octal digits.
+	(txr_error): Default match for \x or \o  not followed
+	by digits.
+
+2015-07-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Hash-bang support for .tl files.
+
+	* parser.c (read_eval_stream): New boolean argument
+	to request hash bang support.
+
+	* parser.h (read_eval_stream): Declaration updated.
+
+	* eval.c (sys_load): Pass new thid argument to read_eval_stream,
+	to decline hash bang support.
+
+	* match.c (v_load): Likewise.
+
+	* txr.c (txr_main): Request hash bang support from
+	read_eval_stream. Thus files referenced from the txr
+	command line can have a #! line, which is ignored.
+
+2015-07-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Handle escapes accurately in Vim syntax highlighting.
+
+	* genvim.txr (txr_badesc, txr_stresc, txr_numesc, txr_regesc): New
+	match categories.
+	(txr_string, txr_quasilit, txr_regex, txl_regex): No longer use skip=
+	argument, but rather contain escape categories.
+	All escapes are colored as Special rather than String, and
+	unknown or malformed escapes are colored as errors.
+
+2015-07-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Take advantage of \@ escape in quasilit.
+
+	* genvim.txr (txr_escat): New match category containing \@.
+	Colorized a String.
+	(txr_quasilit): Contains txr_escat. Thus, \@ looks like any
+	other escape inside a quasilit.
+
+2015-07-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Bugfix: reproduce the correct opening bracket
+	before a function link.
+
+2015-06-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix issues in configure found by ShellCheck.
+
+	* configure (have_timegm, tm_gmtoff, tm_tmzone): Unused
+	variables removed.
+	(SIZEOF_LONG_LONG_T): Reference to nonexistent variable fixed.
+	Also, fixed two instances of arithmetic expressions using
+	unnecessary $ prefixes on variables.
+
+2015-06-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix TXR 97 regression in quasiliterals.
+
+	* eval.c (expand_quasi): When the modifiers argument of a var
+	item is expanded, the expansion incorrectly places it as the
+	fourth item rather than third. This is effectively a continuation
+	of the incomplete regression fix that was applied on 2014-08-29.
+	The breakage is that `@{(expr) modifier}` ignores modifier
+	whenever (expr) is an expression that undergoes expansion.
+
+2015-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Third round of quasiliteral-related fixes.
+
+	* parser.l (char_esc): Recognize \@ escape.
+	(grammar): Add a rule for a \@ escape in quasiliterals,
+	and quasi word list literals.
+
+	* txr.1: Document \@, and remove the lie that @@
+	encodes for a single @ in quasiliterals.
+
+2015-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Second round of quasiliteral-related fixes.
+
+	* parser.l: Only shift to QSPECIAL state when @ is followed
+	by a trailing context consisting of certain characters.
+	Not every kind of Lisp object syntax can be introduced
+	with @ in a quasiliteral. Adding a rule to produce an
+	error when @ appears that is not followed by an allowed
+	character.
+
+2015-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	First round of quasiliteral-related fixes.
+
+	* parser.l: Do not try to recognize floating-point literals
+	in QSPECIAL state; that is not possible because @134.3
+	in a quasiliteral parses as a METANUM followed by ".3".
+	On the other hand, recognize METANUM literals in QSPECIAL state,
+	so that @@123 scans. Recognize @ as a token in QSPECIAL state,
+	so @@abc will scan. When transitioning from QSILIT and QWLIT
+	states to QSPECIAL upon scanning @, return a @ token, which
+	is now parsed in the grammar.
+
+	* parser.y (quasi_meta_helper): New static function.
+	(q_var): Do not handle SYMTOK any more, only the braced
+	variable syntax. SYMTOK is handled as a n_expr.
+	Braced vars are handled with explicit '@' token, which
+	is now produced by the scanner when it shifts from QSILIT
+	to QSPECIAL.
+	(quasi_item): No longer necessary to recognize various
+	forms here such as quotes and splices. Just recognize a n_expr,
+	preceded by '@'.
+
+2015-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: New filter to add hyperlinks within code in
+	more places such as examples and summary lists.
+
+2015-06-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: partition example: wrong use of where function.
+
+2015-06-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_from_pairs, hash_list): New functions.
+
+	* hash.h (hash_from_pairs, hash_list): Declared.
+
+	* eval.c (eval_init): Registered hash-from-pairs and hash-list
+	intrinsic.
+
+	* txr.1: Documented new functions.
+
+2015-06-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Refactoring n-ary functions to use a single helper.
+
+	* lib.c (nary_op): New function.
+	(plusv, mulv, logandv, logiorv): Use nary_op.
+
+	* lib.h (nary_op): Declared.
+
+2015-06-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Hash subset testing.
+
+	* eval.c (eval_init): Register hash-subset and hash-proper-subset
+	intrinsics.
+
+	* hash.c (hash_subset, hash_proper_subset): New functions.
+
+	* hash.h (hash_subset, hash_proper_subset): Declared.
+
+	* txr.1: New functions documented.
+
+2015-06-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Add ifa.tl library file.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-06-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* share/txr/stdlib/place.tl: Get rid of big progn around the
+	whole module.
+
+	* genvim.txr: Handle (def's not preceded by spaces.
+
+2015-06-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 109.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version and date.
+
+	* share/txr/stdlib/ver.tl: Likewise.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-06-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lisplib.c (ifa_set_entries): Add conda.
+
+	* share/txr/stdlib/ifa.tl (conda): New macro.
+
+	* tests/012/ifa.tl: Adding test for conda.
+
+	* txr.1: Documenting conda.
+
+2015-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Rewrite the man2html-generated inner name links with hash
+	values derived from the title text, so that when sections are inserted
+	or deleted, the URL's remain stable. The PREAMBLE is gone, and
+	VERSION is collected when processsing the body.
+
+2015-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr (month-name): Filter removed.
+	Page date is converted to a time value, and later formatted.
+
+2015-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Remove places.h generation hack.
+
+	* Makefile (GEN_HDRS, LISP_TO_C_STRING): Variables removed.
+	(%.h: %.tl): Rule removed. The place.h header is no longer
+	generated from place.tl.
+
+	* lisplib.c (place_instantiate): Load place.tl from stdlib directory,
+	rather than obtaining it from a string literal in generated header
+	place.h.
+
+	* place.tl: Moved to share/txr/stdlib directory.
+
+	* genvim.txr: Refer to place.tl in stdlib.
+
+2015-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register have function, synonym of true.
+
+	* txr.1: Document have.
+
+2015-06-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented ifa.
+
+	* share/txr/stdlib/ifa.tl: Tightened up the tests for
+	situations when the macro is ill-formed, following
+	the improved specification. Also, eval-error is thrown
+	instead of just error.
+
+2015-06-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Test ifa macro.
+
+	* Makefile (TEST_OUT): Include .tl files.
+	(tst/%.out): New rule variant, from .tl prerequisite.
+
+	* tests/012/ifa.expected: New file.
+
+	* tests/012/ifa.tl: New file.
+
+2015-06-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.c (parser_mark): Do not mark p->syntax_tree if
+	its value is nao. Introduced on 2015-06-10, "Error handling improvement
+	in read".
+
+2015-06-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (mkstring): Fix neglect to null terminate.
+
+2015-06-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (cat_str): Detect overflow in the total length
+	calculation.
+
+2015-06-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improvements in equal hashing function.
+
+	* hash.c (equal_hash): For conses and vectors, ensure that
+	distinct permutations lead to different hash codes.  This is done by
+	accumulating the partial hash with a multiplier, rather than just
+	adding subhashes.
+
+2015-06-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Library .txr files become .tl and are autoloaded.
+
+	* lisplib.c (ver_set_entries, ver_instantiate,
+	txr_case_set_entries, txr_case_instantiate): New
+	static functions.
+	(lisplib_init): Register new functions.
+
+	* share/txr/stdlib/txr-case.txr: Reduced to a load for the
+	corresponding .tl file, retained for backward compatibility.
+
+	* share/txr/stdlib/ver.txr: Likewise.
+
+	* share/txr/stdlib/txr-case.tl: New file, based on previous
+	contents of corresponding .txr file.
+
+	* share/txr/stdlib/ver.tl: Likewise.
+
+2015-06-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding anaphoric ifa macro.
+
+	* Makefile (install): Install .tl files present in stdlib directory.
+	(INSTALL): Handle argument 2 being a list.
+
+	* eval.c (load): New function.
+
+	* eval.h (load): Declared.
+
+	* lisplib.c (ifa_set_entries, ifa_instantiate): New functions
+	to lazily load ifa.tl.
+	(lisplib_init): Register new functions.
+
+	* txr.c (stdlib_path): New variable.
+	(sysroot_init): Store the stdlib path in stdlib_path.
+
+	* txr.h (stdlib_path): Declared.
+
+	* share/txr/stdlib/ifa.tl: New file.
+
+2015-06-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Refactoring of lisplib.c
+
+	* lisplib.c (set_dlt_entries): New static function.
+	(set_place_dlt_entries): Renamed to place_set_entries.
+	Uses set_dlt_entries as subroutine.
+	(place_instantiate): Argument changes from table to function,
+	which is invoked to null out the hash entries.
+	(dlt_register): New static function.
+	(lisplib_init): Use dlt_register to register dynamic loading
+	of places_tl.
+
+2015-06-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 108.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version and date.
+
+	* share/txr/stdlib/ver.txr: Likewise.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-06-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented Lisp loading.
+
+2015-06-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	New --lisp option: treat unsuffixed files as Lisp.
+
+	* txr.c (help): Added help text.
+	(txr_main): Handle lisp option.
+
+2015-06-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): Handle Lisp files.
+
+2015-06-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Lisp load macro.
+
+	* eval.c (sys_load_s): New symbol variable.
+	(sys_load, me_load): New static functions.
+	(eval_init): Initialize sys_load_s, register
+	sys:load intrinsic function and load macro.
+
+2015-06-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	@(load) and @(include) now load Lisp code.
+
+	* match.c (v_load): Check txr_lisp_p flag coming out of
+	open_txr_file and handle the Lisp case usin read_eval_stream.
+
+	* parser.c (read_eval_stream, get_parser, parser_errors):
+	New functions.
+
+	* parser.h (read_eval_stream, get_parser, parser_errors):
+	Declared.
+
+2015-06-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Preparing for lisp loading.
+
+	* parser.c (open_txr_file): Rewritten to take new argument
+	which indicates whether to treat an unsuffixed file as
+	TXR or TXR Lisp, and is updated to indicate which is the
+	case by looking at the suffix.
+
+	* parser.h (open_txr_file): Declaration updated.
+
+	* match.c (v_load): Follow change in open_txr_file.
+
+	* txr.c (txr_main): Likewise.
+
+2015-06-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Error handling improvement in read.
+
+	* parser.y (spec): New grammar production to handle the cases
+	that SECRET_ESCAPE_E is not followed by anything (the input
+	ends before any object is scanned, or there is no input
+	token which starts an object).
+
+	* parser.c (lisp_parse): Deal with EOF indication from parser
+	(the syntax_tree member of parser_t set to nao).
+
+2015-06-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (yybadtoken): Print unexpected character
+	literally rather than as a Lisp character literal.
+
+2015-06-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Code simplification.
+
+	* txr.c (txr_main): Replacing two code blocks with single
+	call to existing open_txr_file function.
+
+2015-06-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Critical bugfix for weak hashes.
+
+	* hash.c (hash_mark): Hash tables which have both weak keys
+	and values were not added to the reachable_weak_hashes list,
+	and thus not subject to complete hash processing, leading
+	to corruption.
+
+2015-06-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.h (mkloc): Rename misleading argument from fun to obj.
+
+2015-06-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.c (stream_parser_hash): New static variable.
+	(parser_mark): Mark parser and primer members.
+	(parser, ensure_parser): new argument: primer.
+	(get_parser_impl, ensure_parser): New static
+	functions.
+	(prime_parser): New function.
+	(lisp_parse): Multiple calls to this function on the same stream
+	now logically continue the parse, not resetting the line
+	number to 1.
+	(parse_init): Initialize and gc-protect stream_parser_hash.
+
+	* parser.h (parser_t): New members, primer and parser.
+	(prime_parser): Declared.
+	(parser): Declaration updated.
+
+	* parser.y (parse): Now responsible for calling prime_parser.
+
+2015-06-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): Call parse_once rater than parse.
+
+	* parser.c (regex_parse, lisp_parse): Likewise.
+
+	* txr.c (txr_main): Likewise.
+
+	* parser.h (parse): Declaration updated.
+	(parse_once): Declared.
+
+	* parser.y (parse_once): New function, same as old parse implementation.
+	(parse): Becomes one argument function which works with a previously
+	initialized parser and continues the parse.
+
+2015-06-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (catenated_stream_p, catenated_stream_push): New functions.
+	(stream_init): Registered new functions as intrinsics.
+
+	* stream.h (catenated_stream_p, catenated_stream_push): Declared.
+
+	* txr.1: Documented catenated-stream-p and catenated-stream-push.
+
+2015-05-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Document new syntactic places framework and place-mutating macros.
+
+2015-05-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix mismanaged dyn_env variable.
+
+	* eval.c (bindings_helper): In the parallel binding case, only allocate
+	a new dynamic env when it is needed (because a special variable is
+	being bound), rather than unconditionally.
+	Consequently, only modify dyn_env when the dynamic environment actually
+	needs to be extended.  Constructs that use bindings_helper are only
+	wrapped in the dynamic environment save/restore form
+	sys:with-saved-vars if they bind special variables.
+
+2015-05-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Ligher weight debug instrumentation.
+
+	This speeds up the TXR Lisp interpreter, because do_eval
+	sets up a debug frame and uses debug_return.
+
+	* debug.c (debug_block_s): Symbol removed.
+	(debug_init): Remove initialization of debug_block_s.
+
+	* debug.h (debug_block_s): Declaration removed.
+	(debug_enter): Do not establish a named block or a catch block;
+	no time-wasting unwind stack manipulation at all.
+	The debug_depth variable is managed by the extended setjmp
+	context now.  Provide a return value variable, and a well-defined name to
+	branch to to exit from the debug block.
+	(debug_return): Do not use heavy-weight uw_block_return;
+	simply set the return variable and branch to debug_return_out
+	label.
+
+	* signal.h (EJ_DBG_MEMB, EJ_DBG_SAVE, EJ_DBG_REST,
+	EJ_OPT_MEMB, EJ_OPT_SAVE, EJ_OPT_REST): New macros.
+	(extended_jmp_buf): Define optional global state
+	variables using EJ_OPT_MEMB.
+	(extended_setjmp): Save and restore optional
+	globals using EJ_OPT_SAVE and EJ_OPT_RESTORE.
+	Now debug_depth is saved and restored if
+	debugging support is compiled in.
+
+	* match.c (open_data_source): Remove bogus debug_return
+	invocations which were uncovered here by changes to the macro.
+
+	* eval.c (do_eval, expand_macro): debug_return must now be after
+	debug_end, because it won't dynamically clean up frames that it doesn't
+	know about. The set_dyn_env is no longer unreachable in expand_macro;
+	it is now necessary because debug_return isn't doing the longjmp
+	that previously restored dyn_env.
+
+2015-05-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* place.tl (pushnew): New macro.
+
+	* lisplib.c (set_place_dlt_entries): Add pushnew.
+
+2015-05-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	symbol-function, symbol-value and fun become places.
+
+	* eval.c (op_setqf): New function.
+	(eval_init): Register sys:setqf operator. Also expose
+	global variable hash tables via sys:top-vb and sys:top-fb.
+
+	* place.tl (sys:get-fb, sys:get-vb): New functions.
+	(fun, symbol-function, symbol-value): New places defined.
+
+2015-05-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Introduce defparm operator.
+
+	* eval.c (me_defparm): New function.
+	(eval_init): Register defparm.
+
+	* txr.1: Documented defparm together with defvar.
+	defvar documentation is revised.
+
+2015-05-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Represent place.tl more compactly in image.
+
+	The contents of place.tl are now stored as a UTF-8 ordinary literal
+	instead of a wide char literal.
+
+	* Makefile (LISP_TO_C_STRING): Generate plain literal.
+
+	* lisplib.c: Convert plain literal to string.
+
+2015-05-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Variables are now deletable places, if they are global.
+
+	* place.tl (sys:sym-delete-expander): New function.
+	(get-delete-expander): Retrieve delete expander for
+	symbols.
+
+2015-05-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (symbol_value): Retrieve the binding of a symbol
+	macro also.
+	(boundp): Return t for symbol macros.
+	(makunbound, fmakunbound): New functions.
+	(eval_init): Register makunbound and fmakunbound.
+
+	* txr.1: Document changes to symbol-value and boundp.
+
+2015-05-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (replace_list, replace_str, replace_vec): Handle
+	the case when from is a vector, for consistency with the sel
+	function and the dwim operator.
+
+	* txr.1: Document that the third argument of select and replace may be
+	a vector.
+
+2015-05-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Recursive lcons force bug (keep-if*, remove-if*).
+
+	* lib.c (rem_lazy_func): Do not access the cdr field of
+	the lcons that we are in the middle of forcing!
+
+2015-05-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* place.tl (define-modify-macro): New macro.
+
+	* lisplib.c (set_place_dlt_entries): Add define-modify-macro.
+
+2015-05-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* place.tl (push): Ensure left-to-right eval order.
+
+2015-05-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* place.tl (rlet): For the sake of sane evaluation order
+	in the face of unknown side effects, do not thread symbolic references;
+	only propagate constants.
+
+2015-05-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (env_vb_to_fb): Allow null env argument. This
+	case occurs when (flet () ...) is expanded.
+
+2015-05-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	DWIM places must use Lisp-1 semantics.
+
+	This really only affects code which does something like
+	(set [f x] y) and f resolves as a function. (The TXR Program
+	bent over backwards to install a mutable object into a function
+	binding.) In this situation, we need to update the function binding
+	f, rather than some variable f.
+
+	* eval.c (op_lisp1_setq, op_lisp1_value): New static functions.
+	(eval_init): Register sys:lisp1-setq and sys:lisp1-value
+	special forms.
+
+	* place.tl (sys:*lisp1*): New special variable.
+	(sys:l1-setq, sys:l1-val): New macros, optimizing
+	versions of sys:lisp1-setq and sys:lisp1-value special operators.
+	(sys:sym-place-update-expander, sys:sym-place-clobber-expander):
+	React to sys:*lisp1* variable by doing symbol access using Lisp-1
+	semantics, with help of newly introduced macros and special forms.
+	(dwim): Bind sys:*lisp1* to true, if main argument is a symbolic place,
+	so that the update is done using Lisp-1 semantics. Use the
+	sys:l1-val operator when evaluating arguments.
+
+2015-05-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (lookup_var_l): Gut this function of its silly
+	reimplementation of lookup_var.
+	(op_setq): Use lookup_var instead of lookup_var_l.
+	Now only outside modules use the lookup_var_l interface.
+	Error message fix: sys:setq, not setvar.
+
+2015-05-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Handle vectors and strings in rplaca and rplacd.
+
+	* lib.c (rplaca, rplacd): Use refset and replace
+	respectively to handle vectors and strings.
+	Adjust type mismatch error message.
+
+2015-05-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (chr_str_set): Check for literal strings.
+
+2015-05-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix argument count checking regression.
+
+	* eval.c (apply): Revert some changes from 2015-03-13
+	which cause the too many arguments case not to be
+	diagnosed.
+
+2015-05-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* place.tl (errno): Support (errno) form as place.
+
+2015-05-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improve error message related to splice misuse.
+
+	* eval.c (expand_qquote): Corrected awkward error message text
+	which was saying that a splice "cannot occur as an atom".
+
+2015-05-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding pset operator.
+
+	* place.tl (pset): New macro.
+
+	* lisplib.c (set_place_dlt_entries): Add pset.
+
+2015-05-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* place.tl (set): Take multiple place/value pairs. Allow zero
+	arguments.
+
+2015-05-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Crack down on redefinitions of built-ins.
+
+	* eval.c (builtin, eval_initing): New global variable.
+	(op_defun, op_defmacro): During initialization, record functions
+	and macros in builtin hash.
+	(builtin_reject_test): New static function.
+	(expand_macrolet): Perform builtin reject test for fbind, lbind,
+	and macrolet.
+	(regfun, reg_mac): Add symbol to builtin hash.
+	(eval_init): GC-protect new hash table variable and initialize it.
+	Set eval_initing to true over eval initialization.
+	The flip function is renamed fo flipargs.
+	(eval_compat_fixup): New function, for dealing with the
+	operator/function conflict over flip.
+
+	* eval.h (eval_compat_fixup): Declared.
+
+	* lib.c (compat_fixup): Call eval_compat_fixup.
+
+	* tests/011/macros-2.txr: This test was defining a macro called
+	while which is now illegal. Renamed to whilst.
+
+	* tests/011/macros-2.expected: Regenerated.
+
+	* txr.1:  Function flip renamed to flipargs and documented in
+	Compatibility section.
+
+2015-05-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (LISP_TO_C_STRING): Strip comments, but not comment lines,
+	so line numbers don't change.
+
+	* eval.c (eval_init): Fix registrations of lisp-parse and read.
+
+	* lisplib.c (place_instantiate): Give name to parsed string stream
+	using new lisp_parse argument.
+
+	* parser.c (lisp_parse): Takes new argument to override name.
+
+	* parser.h (lisp_parse): Declaration updated.
+
+	* txr.c (txr_main): Call lisp_parse with four args, defaulting
+	the new one.
+
+	* txr.1: Documented new argument.
+
+2015-05-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	New macro-based framework for assignment places.
+
+	The operators set, inc, dec, pop and others are now macros
+	which generate code, rather than built-in special forms
+	that use "C magic".  Moreover, new such macros are easy to write, and
+	several new ones are already available.  Moreover, new kinds of
+	assignable places are easy to create.
+
+	* place.tl: New file.
+
+	* lisplib.c, lisplib.h: New files.
+
+	* Makefile (OBJS): New target, lisplib.o.
+	(GEN_HDRS): New variable.
+	(LISP_TO_C_STRING): New recipe macro, with rule.
+	(clean): Remove generated headers named in $(GEN_HDRS).
+
+	* eval.c (dec_s, push_s, pop_s, flip_s, del_s): Variables removed.
+	(setq_s): New variable.
+	(lookup_var, lokup_sym_lisp_1, lookup_var_l, lookup_fun, lookup_mac,
+	lookup_symac, lookup_symac_lisp1): Trigger the delayed loading of
+	libraries for undefined global symbols, and re-try the lookup.
+	(op_modplace, dwim_loc, force_l): Static functions removed.
+	(op_setq): New static function.
+	(eval_init): Initialize setq_s; remove initializations of
+	removed variables; remove registrations for op_modplace;
+	add registration for sys:setq, sys:rplaca, sys:rplacd,
+	sys:dwim-set and sys:dwim-del intrinsics.
+	Call lisplib_init to initialize the dynamic library loading module.
+
+	* lib.c (sys_rplaca, sys_rplacd): New functions, differing
+	in return value from rplaca and rplacd.
+	(ref, refset): Handle hash table.
+	(dwim_set, dwim_del): New functions.
+
+	* lib.h (sys_rplaca, sys_rplacd, dwim_set, dwim_del): Declared.
+
+	* genvim.txr: Include place.tl in scan.
+
+	* tests/010/seq.txr: The del operator test
+	case no longer throws at run-time but at macro-expansion time, so the
+	test case is simply removed.
+
+	* tests/010/seq.expected: Updated output.
+
+	* tests/011/macros-2.txr: Reset *gensym-counter* to zero, because
+	the textual output of the test case includes gensyms, whose numberings
+	fluctuate with the content of the new Lisp library material.
+
+	* tests/011/macros-2.expected: Updated output.
+
+2015-05-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (make_obj, gc): Move resetting of prev_malloc_bytes
+	out of make_obj into gc.
+
+2015-05-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Do some cleanup in progn-like form sequences.
+
+	* eval.c (expand_progn): New function.
+	(do_expand): Use expand_progn for constructs
+	which have an implicit progn body.
+
+2015-05-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Deal with bad quote syntax.
+
+	* eval.c (op_quote): Throw error on bad syntax.
+
+	* lib.c (obj_print, obj_pprint): Do not hide bad quote syntax
+	using ' notation; print it using ordinary notation.
+
+2015-05-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Move initialization calls to more suitable place.
+
+	* lib.c (init): Initialize parser, syslog and glob modules
+	here.
+
+	* txr.c (main): Remove initialization of parser, syslog and glob
+	modules from here.
+
+2015-05-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.h (sig_save_disable): Bugfix: macro enabling
+	rather than disabling async signals.
+
+2015-05-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix corruption triggered by extended gc disabling.
+
+	The issue is that when gc is disabled, the gc function
+	does nothing. But various code depends on calls to gc()
+	doing something, like making space available in various
+	static arrays.
+
+	When gc is disabled for long periods, there are issues,
+	like array overruns.
+
+	* gc.c (gc): Must no longer be called at all if gc_enabled is false,
+	and asserts that it is true. Callers must check the gc_enabled
+	flag and implement appropriate cases.
+	(make_obj): Only call gc when gc_enabled is true.
+	If there is no space in the freshobj array after trying gc,
+	or gc couldn't be tried because it is disabled, then
+	schedule a full gc.
+	(gc_set): If the checkobj array is full, only call gc if gc
+	is enabled, otherwise schedule a full_gc.
+	(gc_mutated): Do not assume that the mutobj array has room
+	for another object; only set the object's generation to -1
+	and put it into the array if there is room. Similarly to
+	gc_set, do a gc if there is no room, but if gc is not enabled, then
+	schedule a full gc.
+	(gc_wrap): Only call gc if gc_enabled is true, and return t in
+	that case rathe than nil.
+
+	* txr.1: Document return value of sys:gc function.
+
+2015-04-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix source location for dangling unquotes and splices.
+
+	* parser.y (grammar): Propagate the parser line number to the unquote
+	or splice form, if it has not received location info from its operand
+	(because its operand is an atom). In the quasi_item case, we also use
+	rlcp_tree to make sure the info is propagated through the list being
+	consed up.
+	(rlcp_tree): Bugfix: propagate the source location info to every cons
+	in the list itself, not just into their cars.
+
+2015-04-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improved syntax checking: defun, flet, labels, lambda.
+
+	* eval.c (check_lambda_list): New static function.
+	(op_defun): Argument list checking moved into
+	check_lambda_list, which is called for defun out of
+	do_expand. Name checks moved into do_expand.
+	Thus, defun is checked earlier, at expansion time.
+	(me_flet_labels): Check the lambda list of each lexical function
+	with check_lambda_list.
+	(do_expand): Check the syntax of the lambda form, and
+	the validity of its argument list.
+	Check the name of a defun or defmacro for validity.
+	Check the validity of the defun argument list.
+
+2015-04-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: cannot print (lambda . 42) structure.
+
+	* lib.c (obj_print, obj_pprint): Fix mistake in the test for
+	properly formed lambda syntax whcih is printed specially.
+
+2015-04-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding poll function.
+
+	* configure: Check for the poll function and set
+	HAVE_POLL accordingly in config.h.
+
+	* stream.h (fd_k): External declaration added.
+
+	* sysif.c (poll_wrap): New function.
+	(sysif_init): Registered poll-in, poll-out, poll-err,
+	poll-pri, poll-rdhup, poll-nval, poll-rdband, poll-wrband
+	variables and poll function.
+
+	* txr.1: Documented poll.
+
+2015-04-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 107.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow (force ...) to be an assignable place.
+
+	This allows mlet variables to be assignable.
+
+	* eval.c (force_s): New global variable.
+	(op_modplace): Handle force form.
+	(me_mlet): Use force_s symbol.
+	(force_l): New static function.
+	(eval_init): Initialize force_s variable. Use it in registration
+	of force function.
+
+	* txr.1: Remove text in mlet definition that variables
+	are not assignable. Replace with note about an unspecified behavior.
+
+2015-04-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Introducing mlet macro.
+
+	* eval.c (me_mlet): New static function.
+	(eval_init): Registered mlet macro.
+
+	* txr.1: Documented mlet.
+
+2015-04-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (symbol_package): If the argument is nil, return
+	the user package directly, not the value of the *user-package*
+	variable.
+
+2015-04-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Remove silly package lookup from keywordp.
+
+	This tiny change yields a 165% (2.65X) speedup in the
+	tst/tests/011/mandel.txr test case.
+
+	* lib.c (keywordp): Use keyword_package_var instead of the
+	keyword_package macro which looks up the global environment.
+
+	* parser.y (sym_helper): Likewise.
+
+2015-04-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Regression: runaway allocation of heaps.
+
+	* gc.c (make_obj): Fix regression introduced on 2014-10-18,
+	released in TXR 100. Because make_obj discontinues
+	placing objects into the freshobj_array when the full_gc
+	flag has been set, it is incorrect to allocate another heap
+	when the free list is exhausted and the freshobj_array
+	has room remaining. It has room remaining because it is
+	disused.
+
+2015-04-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (make_obj, gc): The check for insufficient space in freshobj
+	array after a gc is moved into the gc function.
+
+2015-04-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (gc): Minor off-by-one: compare gc_counter to FULL_GC_INTERVAL
+	rather than FULL_GC_INTERVAL - 1, since it is pre-incremented.
+
+2015-04-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Switch to in-tree mpi directory.
+
+	* Makefile (CFLAGS, MPI_OBJS): Refer to mpi directory without version
+	number.
+	(repatch): Target removed.
+	(distclean): Don't try to remove old unpacked tarball mpi directory.
+
+	* configure (mpi_version, have_quilt, have_patch): Variables removed.
+	(gen_config_make): Do not generate mpi_version make variable.
+	Do not test for quilt or patch. No longer extract MPI tarball or
+	try to apply patches.
+
+	* mpi-1.8.6.tar.gz: File removed.
+
+	* mpi-patches: Directory and all files under it removed.
+
+2015-04-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	delay/force overhaul.
+
+	* eval.c (promise_forced_s, promise_inprogress_s): New symbol
+	variables.
+	(me_delay): Change representation of promises so that the
+	original delay form is stashed there for better reporting
+	in the force function. Also, propagate the debug info
+	from the second argument of the form to the entire form;
+	otherwise it will inherit it from elsewhere.
+	(force): Rewritten to follow new three-state representation
+	to detect the recursive case and diagnose it.
+	(eval_init): Register new symbol variables.
+
+2015-04-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 106
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise.
+
+2015-04-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: throwing error when trying to print valid regexps.
+
+	* regex.c (print_rec): Only dianose "bad object in regex syntax"
+	for some atom other than nil, which denotes an empty (sub)expression,
+	like what results from #// or #/a|/ and such.
+
+2015-04-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Do not allow unrecognized escapes in regex.
+
+	* parser.l (REGOP): New regex alias for matching all regex
+	special characters.
+	(grammar): Several rules for regex special characters merged
+	together. New rule introduced to match a special character
+	after a backslash, making it literal. The old rule which makes
+	literal any character after a backslash now throws an error,
+	unless version 105 comaptibility is selected.
+
+	* txr.1: Documented this behavior change.
+
+2015-04-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improvement in error reporting.
+
+	This fix prevents certain situations when an inappropriate form
+	is reported, in the default unhandled exception handler, as pertaining
+	to an error.
+
+	* eval.c (do_eval): Save and restore the last_form_evaled,
+	in an exception-unsafe way.  If we successfully evaluate a form or
+	subform, we can restore the previous one.
+	(expand): Save and restore last_form_expanded similarly. We don't
+	need the unwind block and counter.
+
+2015-04-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding lcons macro.
+
+	* eval.c (me_lcons): New function.
+	(eval_init): Registered lcons macro.
+
+	* txr.1: Documented lcons.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding getenv, setenv and unsetenv.
+
+	* lib.c (setenv, unsetenv): Changed static functions to external.
+	Moved them out of the #if !HAVE_TIMEGM block.
+
+	* lib.h (setenv, unsetenv): Declared.
+
+	* sysif.c (getenv_wrap, setenv_wrap, unsetenv_wrap): New functions.
+	(sysif_init): Registered getenv, setenv and unsetenv.
+
+	* txr.1: Documented getenv, setenv and unsetenv.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix quasistring regression introduced in TXR 81.
+
+	* parser.y (expand_meta): This function must recognize
+	quasistrings, inside (sys:quasi ...) forms, (sys:var ...) forms
+	do not denote TXR Lisp variables. These must not be expanded.
+	Doing so is not only wrong, but the way it was done broke
+	brace variables by stripping their arguments.
+
+2015-04-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding exit* function which calls _exit.
+
+	* sysif.c (exit_star_wrap): New static function.
+	(sysif_init): Registered exit* intrinsic.
+
+	* txr.1: Documented exit*.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Add exec and pipe functions.
+
+	* configure: Check for pipe.
+
+	* sysif.c (exec_wrap, pipe_wrap): New static functions.
+	(sysif_init): Register exec and pipe intrinsics.
+
+	* txr.1: Documented exec and pipe.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding chmod.
+
+	* configure: Detect chmod.
+
+	* sysif.c (chmod_wrap): New function.
+	(sysif_init): Register chmod intrinsic.
+
+	* txr.1: Documented.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding dotimes macro.
+
+	* eval.c (me_dotimes): New function.
+	(eval_init): Registering dotimes macro.
+
+	* txr.1: Documented dotimes.
+
+2015-04-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix escaping issues in open-process on Windows.
+
+	This can now execute programs with spaces in their path names.
+	Arguments can contain embedded double quotes, and other characters
+	that are special to cmd.exe, like &, |, (, ), ^ and others.
+
+	* stream.c (string_extend_count, win_escape_cmd): New static functions.
+	(win_escape_arg): Fix and extend escaping scheme to cover not only
+	the argument processing scheme implemented by programs which use Microsoft's
+	C library, but also to smuggle the command line through cmd.exe.
+	(win_make_cmdline): Use win_escape_cmd to wrap the command.
+	Escape the quotes which are placed around arguments, so cmd.exe
+	doesn't interpret them, which will cause it to suppress its processing
+	of the caret escapes.
+
+2015-04-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow quasiquotes in braces and quasiliterals, and quotes in braces.
+
+	* parser.l: Consolidate rules for recognizing quote, unquote, and
+	quasiquote. An effect of this is that quasiquotes can now occur in
+	braces and in string quasiliterals.
+
+	* parser.y (quasi_item): Support quotes and quasiquotes as quasi items:
+	that is to say, i.e. objects denoted by @ in a quasiliteral.
+
+2015-04-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	Diagnose trailing junk in numeric literals.
+
+	* parser.l: Combining the handling of hex, octal and binary numeric
+	literals into a single rule. Implementing an additional rule which
+	diagnoses such tokens that have trailing junk. Thus, something
+	like #x1F2AZ is now invalid syntax.
+
+2015-04-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing while* and until* loops.
+
+	* eval.c (while_star_s, until_star_s): New symbol variables.
+	(me_while_star, me_until_star): New static functions.
+	(eval_init): Initialize new variables. Register while* and
+	until* macros.
+
+	* txr.1: Documented while* and until*.
+
+	* txr.vim, tl.vim: Regenerated.
+
+2015-04-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* sysif.c: Use HAVE_FORK_STUFF to wrap fork, waitpid and dup/dup2.
+
+2015-04-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Exposing dup and dup2.
+
+	* sysif.c (dup_wrap): New static function.
+	(sysif_init): Register dup_wrap as dupfd. The name dup
+	conflicts with an existing function.
+
+	* txr.1: Documented dupfd.
+
+	* txr.vim, tl.vim: Regenerated.
+
+2015-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Functions open-fileno and fileno.
+
+	* stream.c (fd_k): New keyword variable.
+	(stdio_get_prop): Handle the :fd property by returning
+	the file descriptor.
+	(open_fileno): New function.
+	(stream_init): Initialize fd_k, and register fileno and open-fileno.
+
+	* stream.h (open_fileno): Declared.
+
+	* txr.1: Documented open-fileno and fileno.
+
+	* utf8.c (w_fdopen): New function.
+
+	* utf8.h (w_fdopen): Declared.
+
+2015-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (sweep): Fix comment referring to nonexistent identifier.
+
+2015-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): There is an until_s global variable, so
+	no need to intern the symbol when registering me_until.
+
+2015-04-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fork and wait support.
+
+	* sysif.c (work_wrap, wait_wrap, wifexited, wexitstatus,
+	wifsignaled, wtermsig, wcoredump, wifstopped, wstopsig,
+	wifcontinued): New static functions.
+	(sysif_init): Register new intrinsics: functions fork, wait,
+	w-ifexited, w-exitstatus, w-ifsignaled, w-termsig,
+	w-coredump, w-ifstopped, w-stopsig, w-ifcontinued; and
+	variables w-nohang, w-untraced, w-continued.
+
+	* txr.1: Documented.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (iflet_s, when_s): New global variables.
+	(me_iflet_whenlet): New static function.
+	(eval_init): Initialize when_s, iflet_s. Use
+	when_s for registering me_when.
+	Register me_iflet_whenlet.
+
+	* txr.1: Documented iflet and whenlet.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	New whilet macro.
+
+	* eval.c (while_s): New symbol variable.
+	(me_whilet): New static function.
+	(eval_init): Initialize while_s. Use while_s in registration
+	of while macro. Register new whilet macro.
+
+	* txr.1: whilet is documented.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-04-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	New zap operator.
+
+	* eval.c (zap_s): New global variable.
+	(op_modplace): Support zap.
+	(eval_init): Initialize zap_s, and register as operator.
+
+	* txr.1: Documented zap.
+
+2015-03-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	Array overrun fix in apply.
+
+	* eval.c (APPLY_ARGS): New preprocessor symbol, replaces
+	hard-coded 32 inside apply.
+	(apply): Use APPLY_ARGS for argument array.
+	Fix overrun of args array in non-variadic function case when
+	list has more than APPLY_ARGS elements.
+	Eliminate superflous "variadic" local variable.
+
+2015-03-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	Deal with spurious retention in function application.
+
+	* gc.h (zap): New inline function.
+	(z): New macro.
+
+	* lib.c (generic_funcall, funcall1, funcall2, funcall4, do_not,
+	do_dup, do_iff): Use z macro to burn funargs with no next use.
+
+	* eval.c (apply, apply_frob_args, iapply, call, do_eval,
+	op_dwim, mapcarv, mappendv, lazy_mapcarv_func, mapdov, do_apf,
+	do_ipf, callf): Use z macro to burn funargs with no next use.
+
+2015-03-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Bugfix: ~X printing in lower case, like ~x,
+	when argument is a bignum integer.
+
+2015-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/eliminate-locale-dependencies: New patch.
+	(s_mp_tovalue): Eliminate use of isupper, islower.
+
+	* mpi-patches/series: Add patch.
+
+2015-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	New -n option. New "i" mode letter in file opening functions.
+
+	* stream.c (struct stdio_mode): New struct type.
+	(stdio_mode_init_trivial): New initializer macro.
+	(parse_mode, format_mode, normalize_mode, set_mode_props):
+	New static functions.
+	(make_stdio_stream_common): the isatty check, and automatic marking
+	of tty device streams as real-time is no longer done, unless
+	backward compatibility 105 or earlier is requested.
+	(open_file, open_tail,  open_command, open_process): Use new
+	mode parsing, which supports the "i" flag.
+	(stream_init): If we have isatty, and standard input is a tty,
+	then mark the *std-input* stream as real-time.
+
+	* txr.1: Document -n/--noninteractive option. Fix typo where
+	real-time-stream-p is referred to as stream-real-time-p.
+	Document "i" flag on open-file and others.
+
+	* txr.c (opt_noninteractive): New global.
+	(help): Help text for -n/--noninteractive.
+	(txr_main): Handle new options.
+
+	* txr.h (opt_noninteractive): Declared.
+
+2015-03-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (prinl, pprinl): Become external functions.
+	(tprint): New function.
+	(eval_init): Register tprint as intrinsic.
+
+	* eval.h (prinl, pprinl, tprint): Declared.
+
+	* txr.c (txr_main): New option, -t.
+
+	* txr.1: Documented tprint and -t option.
+
+2015-03-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): register get-lines as having one optional
+	argument.
+
+	* lib.c (lazy_stream_cons): Default the argument to std_input.
+
+	* txr.1: Document that the stream is optional in get-lines.
+
+2015-03-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (enforce): Update error error message.
+
+	* configure (have_git): Don't set this variable if
+	the TXR repository is missing, even if git is installed.
+	I.e. have_git means have have the tool and the repo.
+
+2015-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (int_str): Workaround for wcstol recognizing the 0x prefix when
+	radix is 16. Also, thrown an error if radix is not in the range
+	0 to 36.
+
+	* txr.1: Document int-str's radix range restriction.
+
+2015-03-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (help): Added missing documentation for -e and -p.
+	Also documented -P.
+	(txr_main): New option implemented, -P.
+
+	* txr.1: Document -P, and clean up -e and -p documentation.
+
+2015-03-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 105.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise.
+
+	* txr.vim, tl.vim: Regenerated.
+
+2015-03-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (run): In Windows version, fix nasty corruption bug:
+	we were freeing C strings that were not duplicated, but only borrowed
+	from string objects.
+
+2015-03-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (open_process, run): Eliminate utf8name local variable
+	and associated memory leak. Correctly allocate only nargs + 1 elements
+	for argv array, not nargs + 2.
+
+2015-03-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* sysif.c (mkdir_nothrow_exists): New static function.
+	(ensure_dir): New function.
+	(sysif_init): ensure_dir registered as intrinsic.
+
+	* txr.1: ensure_dir documented.
+
+2015-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.c (open_txr_file, regex_parse, lisp_parse): Functions
+	moved here from parser.l.
+
+	* parser.l (open_txr_file, regex_parse, lisp_parse): Functions
+	moved from here to parser.c.
+
+2015-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (OBJS): Add parser.o.
+
+	* parser.h (parser_s): Declared.
+	(parse_init): Declaration removed.
+	(parser_l_init): Declared.
+
+	* parser.l (parse_init): Function renamed to parser_l_init.
+
+	* parser.c: New file.
+
+2015-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	New ignerr macro.
+
+	* eval.c (me_ignerr): New static function.
+	(eval_init): Registered ignerr macro.
+
+	* txr.1: Documented.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Introducing persistent error state on streams.
+
+	* lib.c (cobj_ops): New function.
+
+	* lib.h (cobj_ops): Declared.
+
+	* stream.c (null_ops): Initializer updated.
+	(struct stdio_handle): New member, err.
+	(stdio_stream_mark): Mark the err member.
+	(errno_to_string): New static function.
+	(stdio_maybe_read_error, stdio_maybe_error): Set persistent error
+	state. Use errno_to_string_function.
+	(stdio_put_string, stdio_put_char, stdio_put_byte, stdio_seek,
+	stdio_get_line): Set errno to zero, so that if the underlying
+	operations do not set errno on err, we don't misinterpret some pervious
+	errno value as pertaining to the failed stream operation.
+	(stdio_get_error, stdio_get_error_str, stdio_clear_error): New static
+	functions.
+	(stdio_ops, tail_ops, pipe_ops): Update initializer with new functions.
+	(string_in_get_error, string_in_get_error_str): New static functions.
+	(string_in_ops): Update initializer with new functions.
+	(byte_in_get_error, byte_in_get_error_str): New static functions.
+	(byte_in_ops): Update initializer with new functions.
+	(string_out_ops, strlist_out_ops): Update initializer with null
+	pointers for new functions.
+	(struct dir_handle): New struct type.
+	(dir_destroy, dir_mark): New functions.
+	(dir_get_line): Refactor for struct dir_handle context rather than DIR.
+	Persist error state.
+	(dir_close): Refactor for struct dir_handle.
+	(dir_get_error, dir_get_error_str, dir_clear_error): New static functions.
+	(dir_ops): Update initializer with new functions.
+	(make_stdio_stream_common): Initialize new err member.
+	(make_dir_stream): Refactor for struct dir_handle.
+	(get_error, get_error_str, clear_error): New functions.
+	(cat_get_error, cat_get_error_str, cat_clear_error): New static
+	functions.
+	(cat_stream_ops): Update initializer with new functions.
+	(stream_init): Register get-error, get-error-str, clear-error intrinsics.
+
+	* stream.h (struct strm_ops): New function pointer members, get_error,
+	get_error_str and clear_error.
+	(strm_ops_init): Macro extended with new arguments for new function pointers.
+	(get_error, get_error_str, clear_error): Declared.
+
+	* syslog.c (syslog_strm_ops): Update initializer with null
+	pointers for new functions.
+
+	* txr.1: Documented get-error, get-error-str and clear-error.
+
+2015-02-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improved error reporting, particularly for macro expansion.
+
+	* eval.c (last_form_expanded): New variable.
+	(do_expand): New static function; contains previous expand
+	function.
+	(expand): Becomes a wrapper for do_expand, with re-entry
+	counting.
+	(eval_init): GC-protect last_form_expanded.
+
+	* eval.h (last_form_expanded): Declared.
+
+	* parser.l (regex_parse, lisp_parse): Just use a simple word for
+	the name of the regex or string parse location, not the entire
+	expression itself.
+
+	* unwind.c (uw_throw): Check whether expansion was going on
+	when the unhandled exception was thrown and print additional
+	information.
+
+2015-02-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* regex.c (match_regex_right): Bugfix: zero length matches
+	should return zero length, rather than nil. This is achieved by trying
+	the match at one past the last character.
+
+2015-02-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	String-returning wrappers for some regex matching functions.
+
+	* eval.c (eval_init): Register search-regst, match-regst
+	and match-regst-right intrinsics.
+
+	* regex.c (search_regst, match_regst, match_regst_right): New functions.
+
+	* regex.h (search_regst, match_regst, match_regst_right): Declared.
+
+	* txr.1: Documented new variants.
+
+2015-02-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* regex.c (print_rec): A compound must use parentheses for
+	elements which have a higher precedence than catenation.
+
+2015-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (list_collect, list_collect_append): In error
+	messages about bad appends, do not show the list being
+	appended because it may be an infinite lazy list.
+	For instance (append* 3 lazy-list).
+
+2015-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	New functions pad and weave.
+
+	* eval.c (pad_func, pad, weave_while, weave_gen, weavev):
+	New static functions.
+	(eval_init): Registered pad and weave intrisics.
+
+	* txr.1: Documented pad and weave.
+
+2015-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (lazy_appendv_func, lazy_appendv): Bugfix: append*
+	was silently ignoring lists after the first atom, instead of
+	throwing an error. Also, it was not detecting the case that
+	the last argument is a list which should just be returned,
+	and instead trying to find its tail in preparation for the
+	next call to lazy_appendv_func, the consequences being runaway
+	iteration over an infinite list.
+
+2015-02-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (symacro_k, fun_k): New keyword variables.
+	(lexical_lisp1_binding): New static function.
+	(eval_init): Initialize symacro_k and fun_k; register
+	new intrinsic function lexical-lisp1-binding.
+
+	* match.h (var_k): Existing external name declared.
+
+	* txr.1: Documented lexical-lisp1-binding.
+
+2015-02-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: Add dependency froml $(EXTRA_OBJS-y) to header
+	file and config.h, so windows resource file is rebuilt
+	when the version changes.
+
+2015-02-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: Removing bogus eval which refers to nonexistent
+	DEP_INSTANTIATE macro.
+
+2015-02-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (clean): Remove $(EXTRA_OBJS-y) so the Windows .res
+	file is removed.
+
+2015-02-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 104.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+2015-02-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (trunc_rem): New function.
+
+	* eval.c (eval_init): Register trunc-rem intrinsic.
+
+	* lib.h (trunc_rem): Declared.
+
+	* txr.1: Documented trunc-rem.
+
+	* tl.vim, txr.vim: Updated.
+
+2015-02-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (CFLAGS): Removed puzzling, unnecessary definitions
+	of XMALLOC, XCALLOC, XREALLOC and XFREE for $(MPI_OBJS). MPI
+	does not use such macros and the allocator is already retargetted
+	to use the TXR one.
+
+	* mpi-patches/use-txr-allocator: In this patch, we don't need
+	external declaration for chk_malloc or chk_realloc because they
+	are not used. Only chk_calloc is used.
+
+	* mpi-patches/add-bitops: Refreshed.
+
+	* mpi-patches/add-mp-hash: Likewise.
+
+	* mpi-patches/add-mp-set-intptr: Likewise.
+
+	* mpi-patches/add-mpi-toradix-with-case: Likewise.
+
+	* mpi-patches/bit-search-optimizations: Likewise.
+
+	* mpi-patches/export-mp-eq: Likewise.
+
+	* mpi-patches/faster-square-root: Likewise.
+
+	* mpi-patches/fix-bad-shifts: Likewise.
+
+	* mpi-patches/fix-ctype-warnings: Likewise.
+
+	* mpi-patches/fix-mult-bug: Likewise.
+
+	* mpi-patches/mpi-set-double-intptr: Likewise.
+
+	* mpi-patches/mpi-set-mpi-word: Likewise.
+
+	* mpi-patches/mpi-to-double: Likewise.
+
+2015-02-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support txr-win.exe target which has no console window.
+
+	* Makefile (EACH_CONF): Iterate over arguments.
+	(opt/txr-win.o, dbg/txr-win.o): New special object files.
+	(opt/%-win.o, dbg/%-win.o): New pattern rule to build special object
+	files.
+	($(PROG)-win, $(PROG)-win-dbg): New program targets.
+
+	* inst.nsi: Install txr-win.exe.
+
+2015-02-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: fixed flurry of phrasing, formatting fumbles.
+
+2015-02-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/011/macros-1.txr: Add test for lexical function
+	shadowing symbol macro.
+
+	* tests/011/macros-1.expected: Updated.
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* unwind.c (uw_throw): Detect invalid re-entry and bail.
+	Cautiously, we use fprintf rather than our streams system, in case some
+	problem with the streams is involved in this mess.
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* unwind.c (uw_throw): Put a txr: prefix on the unhandled
+	exception in early initialization message.
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Slight internal representation change of string-only exceptions.
+
+	One upshot of all this is that (throw 'foo "msg") now
+	does exactly the same thing as (throwf 'foo "msg").
+	A message-only exception really is a one-string exception argument
+	list ("message ..."), like the documentation says.
+
+	* unwind.h (struct uw_catch): exception member renamed to args.
+	(uw_catch): Macro follows structure member rename.
+
+	* eval.c (op_catch): Removed now unnecessary kludge of turning non-list
+	exception argument list into a one-element argument list.
+
+	* match.c (v_try): Similar hack to the one in op_catch
+	removed here.
+
+	* unwind.c (uw_unwind_to_exit_point, uw_push_catch): Follows rename of
+	exception member.
+	(uw_throw): The exception parameter is renamed to args.  The kludge
+	removed from op_catch re-appears here, because numerous calls
+	to uw_throw just pass a string as args. It's less of a kludge here
+	because this is the master entry point to exception processing,
+	and it straightens out the representation right away.
+	The exception arguments or message are printed in a clearer way.
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Serious bugfix in the op macro, and derived macro, in
+	the handling of missing meta-numbers (for
+	instance (op ... @1 .. @3): 1 and 3 occur, but not 2.
+
+	* eval.c (supplement_op_syms): Bugfix: loop was testing
+	and updating the wrong variable, causing it to be looking at the first
+	element of the syms list in every iteration.
+	Not a regression: this was implemented wrong when the function
+	was introduced on October 6, 2013.
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (subst_vars): Bugfix. When an ordinary variable
+	occurs in the quasi syntax (which is the result of substitution
+	of metanums like @1 by the op macro), if that variable
+	evaluated to a list form, it was not being converted to
+	a string. The resulting form was then examined for variable
+	substitutions as if it were part of the quasi syntax.
+	This was introduced at the same time as the feature of being
+	able to use metanums in a quasiliteral (Feb 13, 2012:
+	last change before Version 57).
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (transform_op): When expanding @rest and metanums
+	like @1, @2, preserve the (sys:var X args ..) structure
+	if there are args (but of course with X replaced by the appropriate
+	gensym). This allows syntax like `@{1 10}` to work in quasiliterals: in
+	other words, modifiers on interpolated metas, on par with @{a 10}.
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* sysif.c (abort_wrap): New static function.
+	(sysif_init): Registered abort intrinsic.
+
+	* txr.1: Documented abort. Changed Unix Programming heading
+	to System Programming, since exit, abort and errno are not
+	Unix-specific, but C-specific.
+
+	* tl.vim, txr.vim: Updated.
+
+2015-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* unwind.c (unhandled_hook_s): New static variable.
+	(uw_throw): In the unhandled case, check if *unhandled-hook* variable
+	has a function, and use it instead of the default logic. If it's not a
+	function, abort with an error message. Clear it so that if the hook
+	function re-enters this code, it will not be used. Always exit now on
+	unhandled exceptions; do not abort.
+	(uw_late_init): New function.
+
+	* unwind.h (uw_late_init): Declared.
+
+	* lib.c (init): Call uw_late_init.
+
+	* txr.1: Documented *unhandled-hook*.
+
+	* genvim.txr: Scan the unwind.c file, since it has a reg_var now.
+
+	* tl.vim, txr.vim: Updated.
+
+2015-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* win/env.nsh: Before the potentially length SendMessage,
+	print an informative message.
+
+2015-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* win/env.nsh: Improve messages about environment
+	variable modification.
+
+2015-02-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Symbol macros shadowed by functions under dwim.
+
+	* eval.c (lookup_symac_lisp1, expand_lisp1,
+	expand_forms_lisp1): New static functions.
+	(expand): Handle dwim's arguments via
+	expand_forms_lisp1, rather than as a generic
+	compound form.
+
+	* txr.1: Revised text in several places to clarify
+	this expansion rule.
+
+2015-02-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 103
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+2015-02-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Update copyright notices from 2014 to 2015.
+
+	* arith.c, arith.h, combi.c, combi.h, debug.c, debug.h, eval.c, eval.h,
+	filter.c, filter.h, gc.c, gc.h, hash.c, hash.h, lib.c, lib.h,
+	match.c, match.h, parser.h, rand.c, rand.h, regex.c, regex.h,
+	signal.c, signal.h, stream.c, stream.h, sysif.c, sysif.h, syslog.c,
+	syslog.h, txr.c, txr.h, unwind.c, unwind.h, utf8.c, utf8.h:
+	Update.
+
+	* LICENSE, METALICENSE: Likewise.
+
+2015-02-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Windows installer.
+
+	* inst.nsi: New file.
+
+	* win/env.nsh: New file.
+
+2015-01-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	On Windows, add icon and identifying meta-data to executable.
+
+	* Makefile (EXTRA_OBJS-y): New variable.
+	(WINDRES): New recipe.
+
+	* configure: Check for presence of windres,
+	and generate add_win_res variable in config.make.
+
+	* win/txr.xcf: New file: GIMP project for icon.
+
+	* win/txr.ico: New file: icon with three sizes generated
+	from GIMP project.
+
+	* win/txr.rc: New file.
+
+2015-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Use macro to initialize strm_ops.
+
+	* stream.h (strm_ops_init): New macro.
+
+	* stream.c (null_ops, stdio_ops, tail_ops, pipe_ops, string_in_ops,
+	byte_in_ops, string_out_ops, strlist_out_ops, dir_ops,
+	cat_stream_ops): Initialize using macro.
+
+	* syslog.c (syslog_strm_ops): Likewise.
+
+2015-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Use macro to initialize cobj_ops.
+
+	* lib.h (cobj_ops_init): New macro.
+
+	* hash.c (hash_ops, hash_iter_ops): Initialize with cobj_ops_init.
+
+	* rand.c (random_state_ops): Likewise.
+
+	* regex.c (char_set_obj_ops, regex_obj_ops): Likewise.
+
+2015-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (make_ubignum): New static function.
+	(sign_extend): New function.
+
+	* eval.c (eval_init): Register sign-extend intrinsic.
+
+	* lib.h (sign_extend): Declared.
+
+	* txr.1: Documented sign-extend.
+
+	* tl.vim, txr.vim: Updated.
+
+2015-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: fixed use of nonexistent str-int in @(require) example;
+	fixed bad formatting under logtrunc and partition.
+
+2015-01-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (get_opt_param_syms): Fix broken function. This
+	was choking on keywords like :env in the lambda list,
+	and failing to handle the nested patterns of macro
+	lambda lists. Failing case: (defmacro x (: opt :env foo)).
+
+2015-01-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_macro_params): Bugfix: the colon argument's special
+	meaning "treat the argument as missing" must apply only to optional
+	parameters.
+
+2015-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (make_like): Fix regression introduced in 102.
+	A one element list being converted to a string
+	treated as an empty list, leading to empty string.
+
+2015-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (width): New function.
+
+	* arith.h (width): Declared.
+
+	* eval.c (eval_init): Width registered as intrisinc.
+
+	* txr.1: Documented width.
+
+2015-01-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (call_f): New global variable.
+	(do_mapf, mapf): New static functions.
+	(eval_init): Protect call_f from gc, and initialize it.
+	Re-register call function using call_f.
+	Register mapf intrinsic.
+
+	* txr.1: Documented mapf.
+
+2015-01-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register dupl and swap_12_21 as
+	the dup and flip intrinsics.
+
+	* lib.c (do_dup): New static function.
+	(dupl): New function.
+
+	* lib.h (dupl): Declared.
+
+	* txr.1: Documented dup and flip.
+
+2015-01-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (callf): New static function.
+	(eval_init): callf registered.
+
+	* txr.1: Documented callf.
+
+2015-01-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Basic implementation of constantp. Does not
+	recognize forms like (+ 2 2) as constant.
+
+	* eval.c (constantp_noex, constantp): New functions.
+	(eval_init): Registered constantp as intrinsic.
+
+	* tl.vim, txr.vim: Updated.
+
+	* txr.1: Documented constantp.
+
+2015-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (get_string): New argument, close_after_p.
+	Close the stream unless close_after_p is specified and is nil,
+	or when it is missing, an there is no compatibility or it's
+	newer than version 102.
+
+	* stream.h (get_string): Updated declartion.
+
+	* txr.1: Documented default closing behavior of get-string
+	and the new optional argument for overriding it.
+
+2015-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Minor fix in split-str-set documentation.
+
+2015-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow macros to tell what symbols have lexical function
+	or variable bindings.
+
+	* eval.c (lexical_var_p, lexical_fun_p): New local functions.
+	(eval_init): Registered as intrinsics.
+
+	* txr.1: Documented lexical-var-p and lexical-fun-p.
+
+	* tl.vim, txr.vim: Updated.
+
+2015-01-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 102
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+	* tl.vim, txr.vim: Regenerated.
+
+2015-01-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (zerop): Handle character arguments.
+	(plusp, minusp): New functions.
+
+	* eval.c (eval_init): Register plusp and minusp.
+
+	* lib.h (plusp, minusp): Declared.
+
+	* txr.1: Documented plusp and minusp, and the
+	handling of characters by zerop.
+
+2015-01-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix for LLVM wchar_t literals not being four byte
+	aligned, affecting OS X port.
+
+	* configure: Detect a SIZEOF_WCHAR_T when detecting integer
+	type that will hold a pointer. In the lit_align test,
+	if we are on Apple Mac OSX, use a lit_align of 2,
+	so the logic kicks in for padding literals and handling
+	misalignment.
+
+	* lib.h (litptr): Add a case for LIT_ALIGN < 4 and
+	SIZEOF_WCHAR_T == 4. In this case we do the arithmetic
+	on the pointer using short *, and then convert to
+	wchar_t.
+
+	* HACKING: New section 2.4.3 about new wchar_t hack.
+
+2015-01-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.h (sig_save_enable, sig_save_disable):
+	Use do;while(0) trick instead of local typedef
+	to cause terminating semicolon to be required.
+	(sig_restore_enable, sig_restore_disable):
+	Remove superfluous do { } while (0).
+	Closing a brace is good enough.
+
+2015-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* glob.c: New file.
+	(glob_wrap, glob_init): New functions.
+	(errfunc_thunk): New static function.
+
+	* glob.h: New file.
+
+	* txr.c (main): call glob_init if HAVE_GLOB is defined.
+
+	* configure (have_glob): New variable.
+	(gen_config_make): Add have_glob to config/config.make.
+	Detect glob function and set have_glob, and add
+	HAVE_GLOB to config/config.h.
+
+	* Makefile (OBJS): Include glob.h if have_glob is "y".
+
+	* genvim.txr: Scan glob.c for functions and variables also.
+
+	* txr.1: Documented glob and glob-related variables.
+
+2015-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (retest): New phony target for convenience.
+
+2015-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (make_like): Bugfix. (make-like nil "abc")
+	must return the empty string, not nil. Only
+	lists of non-characters fail to convert to a string.
+	Since programs may depend on the hitherto wrong,
+	undocumented behavior, this is made subject to
+	compatibility.
+
+	* txr.1: Added compatibility note.
+
+2015-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (merge_wrap): Make generic over sequences.
+
+	* txr.1: Update documentation for merge function.
+
+2015-01-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_trailer): Bugfix: not returning new variable
+	bindings captured in trailer section. Ouch!
+
+2015-01-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 101
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+2015-01-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (rebuild, clean, repatch): Fail these targets if
+	the program is not configured.
+	(distclean): Providing alternative implementation when the
+	program is not configured.
+
+2014-12-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (replace_str, replace_vec): Bugfix. The replacement item
+	sequence may be an infinite list in the case that the from argument
+	specifies a list of indices. We must avoid trying to calculate its
+	length before we have detected this case.
+
+2014-12-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Fix error. (set [seq index-list] new) corresponds to
+	replace not to refset.
+
+2014-12-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (stream_init): Register make_catenated_stream in
+	a different form as cat-streams.
+
+	* txr.1: Document cat-streams.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2014-12-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (simple_lazy_stream_func): Bugfix: close the stream
+	if get_line returns nil.
+
+	* stream.c (cat_get_line, cat_get_char, cat_get_byte): The catenated
+	stream read operations close an exhausted stream before popping
+	to the next one.
+
+	* txr.1: Document closing behavior of catenated streams.
+
+2014-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (ap_s, ret_s, aret_s): New symbol variables.
+	(me_ret): Static function renamed to me_ret_aret.
+	Handles ret and aret macro expansion.
+	(eval_init): Initialize ap_s, ret_s and aret_s.
+	Re-register ret macro using ret_s and bind to me_ret_aret.
+	Register aret macro.
+
+	* txr.1: Documented aret.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2014-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Registered intrinsic function unique.
+
+	* lib.c (unique): New function.
+	(uniq): Becomes wrapper around unique.
+
+	* lib.h (unique): Declared.
+
+	* txr.1: Documented unique, and equivalence between uniq and unique.
+
+	* tl.vim, txr.vim: Regenerated.
+
+2014-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (func_n1ov, func_n2ov, func_n3ov): New functions.
+
+	* lib.h (func_n1ov, func_n2ov, func_n3ov): Declared.
+
+2014-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (func_n0o): Useless, unused function removed.
+
+	* lib.h (func_n0o): Declaration removed.
+
+2014-12-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Syntax highlighting issue: keywords in braced variable syntax
+	not being recognized.
+
+	* genvim.txr (txr_braced_ident): New match kind, specifically
+	for a keyword.
+	(txr_bracevar): Bracevar region contains txr_braced_indent.
+
+	* txr.vim, tl.vim: Regenerated.
+
+2014-12-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (copy): Support copying random state objects
+	vi make_random_state.
+
+	* txr.1: Updated.
+
+2014-12-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (rand32): Bugfix: if the seed object is a random
+	state, we do not want to make the 8 calls to rand32 to
+	mix up the state; we need are making a straight copy.
+
+	* txr.1: Document the possibility that the seed object
+	is a random state. Document the platform-independence of the
+	integer seed.
+
+2014-12-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (struct rand_state): Change cur member to unsigned.
+	This generates better code for rand32.
+
+2014-12-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (rstate): New inline function.
+	(rand32): Use inline function instead of macro.
+	I compared gcc -O2 output on Intel: no difference.
+
+2014-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Factor out some compiling commands into macros.
+
+	* Makefile (COMPILE_C, COMPILE_C_WITH_DEPS, LINK_PROG): New
+	macro strings.
+	(dbg/%.o, opt/*.o, %.o, $(PROG), $(PROG)-dbg, conftest,
+	conftest2): These targets now use these commands.
+
+2014-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Build bugfix: if a config.h header exists in $(top_srcdir),
+	then that header is used when building in a separate directory,
+	instead of the config.h generated in that directory.
+	To fix this, we move config.h into a config/ subdirectory.
+	The $(top_srcdir)/config is not in the include search path
+	when buiding in a separate build directory.
+	While we are at it, let's move all the configure materials
+	generated by the configure script into config/.
+
+	* Makefile: include config/config.make at the top. Removing the
+	rule which asserts the existence of configuration based on
+	the presence of config.make.
+	(CFLAGS): Add $(conf_dir) to include search path with -iquote.
+	(notconfigured): New conditionally-defined target for producing
+	the error message when the build system is not configured.
+	(NL, DEP): New variables.
+	($(OBJS)): Make dependent on config/config.make and config/config.h
+	with help of DEP macro.
+	(opt/lex.yy.o, dbg/lex.yy.o): Express dependency using DEP.
+	(y.tab.h): Split off as a dependent on y.tab.c rather than
+	a co-target in the rule.  The rule has a body to handle
+	the situation when y.tab.h is missing for some reason, but
+	y.tab.c already exists (and so won't be re-made, and so
+	y.tab.h won't be remade).
+
+	* configure: Require GNU Make 3.81 rather than 3.80.
+	(conf_dir): New variable.
+	(config_h, config_make, config_log): New variables.  These are used in
+	place of config.h, config.make and config.log.  Add conf_dir to
+	config.make variable.
+
+2014-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (have_git): New variable and configure test for git.
+
+	* Makefile (SRCS): Only set if git is available.
+	(enforce): Fail if we don't have git.
+
+2014-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Throwing away old dependency system.
+
+	* Makefile (DEPGEN): New macro variable.
+	(OPT_OBJS, DBG_OBJS): Define with := assignment.
+	(OBJS): New variable.
+	(dbg/%.o, opt/*.o): Use -MMD and -MT options of gcc to generate
+	dependencies. Also use DEPGEN macro to rewrite each dependency
+	makefile's rule into a DEP_ variable assignment.
+	(DEP_INSTANTIATE): New macro variable.
+	(include dep.mk): Removed, replaced by eval hack that
+	includes all the .d files and instantiates the rule from
+	the DEP_ variable in each one.
+	(opt/lex.yy.o, dbg/lex.yy.o): We need to hard code the dependency
+	of these on y.tab.h, to force that header to generate.
+	(DEP_opt/lex.yy.o, DEP_dbg/lex.yy.o): New variables, related
+	to above.
+	(depend): Target removed.
+
+	* dep.mk: File removed.
+
+	* depend.txr: File removed.
+
+2014-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (ABBREV): Rewrite to take advantage of DEP_
+	variables to remove the dependencies from the output.
+	(ABBREV2): No longer needed, removed.
+	(dbg/%.o, opt/%.o, %.o): Just use ABBREV instead of ABBREV2; it does
+	the right thing.  Dependency of objects on config.make removed.
+
+2014-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (install-tests): Do not use option -c of
+	cpio (use old ASCII format). This was unintentional.
+	On extract, use -m option to preserve timestamps,
+	like we do in INSTALL.
+
+2014-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Test output goes to tst/ now.
+
+	* Makefile (TESTS_OUT): We don't need to refer to top_srcdir.
+	Add the tst/ prefix to .out paths. Find must be used with -H
+	because tests is a symlink for out-of-tree build directories.
+	(tests/*): All target-specific assignments are moved to tst/tests/*
+	paths, and top_srcdir is no longer used in the right hand side
+	values.
+	(%.out): Becomes (tst/%.out).
+	(%.ok): need to compute .expected name from .out differently to
+	account for tst/ prefix.
+	(tests.clean): Just remove the tst directory.
+	(install-tests): Remove the tst directory first so test commands
+	are forced to run (though it is a dry run).
+	We no longer need to switch to top_srcdir to find the .txr
+	files, nor do we have to filter out .out files from the tests
+	tree. We no longer have to switch to top_srcdir in the recursive
+	make. Also, show the installation of tests using ABBREV3.
+
+	* configure: When configuring in a separate directory, symlink
+	the tests directory back to the source tree. Since there
+	are now three things being symlinked, rewrote that as a loop.
+	The recommendation to build in a separate directory is just a note, not
+	a warning.
+
+2014-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (($TESTS_OUT)): Do not depend on $(PROG).
+	This adds superfluous commands to run.sh under make install-tests,
+	and is also inappropriate if a different txr binary is being tested.
+	(install-tests): Do not override top_srcdir in the recursive make
+	call; instead use -C to change to $(top_srcdir).
+
+2014-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (all): Mark as phony target.
+
+2014-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Condensed make output.
+
+	* Makefile (VERBOSE): New variable.
+	(V, ABBREV, ABBREV1, ABBREV3): New macro variables.
+	(dbg/%.o, opt/%.o): Use V, ABBREV1 for concensed output.
+	($(PROG), $(PROG)-dbg, lex.yy.c, y.tab.c, %.out,
+	%.ok, INSTALL): Likewise, but use ABBREV.
+	(tests, GREP_CHECK, config.make, conftest.yacc,
+	conftest.clean): Use $(V) instead of @.
+	(tests.clean): Remove @; do not hide remove commands.
+	(INSTALL): Use $(V) instead of @ and use ABBREV3 to
+	provide condensed output.
+	(install): Use $(V) on $(PREINSTALL) so we don't see :
+	in the output.
+	(install-tests): Put $(V) on all steps.
+
+2014-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Debug builds optional with --debug-also config option.
+
+	* Makefile (PROG): Variable removed, now set in config.make.
+	(all): Target now depends on $(BUILD_TARGETS) variable, set
+	in config.make.
+
+	* configure (debug_also) New variable.
+	(gen_config_make): Generate PROG and BUILD_TARGETS variables.
+
+2014-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (tofloat, toint): Handle characters.
+	Fix error message in toint wrongly identifying itself as tofloat.
+
+	* txr.1: Document handling of characters.
+
+2014-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register in function as intrinsic.
+
+	* lib.c (in): New function.
+
+	* lib.h (in): Declared.
+
+	* txr.1: Documented in.
+
+	* txr.vim, tl.vim: Regenerated.
+
+2014-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (set_diff): Bugfix: use member rather than find,
+	so that a nil set element is handled properly.
+
+2014-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (INSTALL): Bugfix: touch -r $(2) does not work
+	right when $(2) is a wildcard like path/to/*.txr.  It touches files in
+	the source tree to the timestamp of the argument after -r.  Putting in
+	a shell loop to handle this.
+
+2014-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (TESTS_TMP): New variable.
+	(TESTS_OUT): Depends on $(PROG).
+	(TESTS_OK): Does not dependon $(PROG).
+	(tests): Does not depend on tests.clean.
+	(retest): Target removed.
+	(%.out : %.txr): Generate to temporary file,
+	then move to .out.
+	(tests.clean): Remove $(TESTS_TMP).
+
+2014-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (SRCS): Compute from top_srcdir, so we don't get a warning
+	from git, and "make enforce" works from out of three builds.
+
+2014-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Bugfix: the "share" directory has to be
+	symbolically linked. Without this, tests which require txr to have
+	access to its library do not work.
+
+2014-12-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	TXR now builds optimized and debug at the same time.
+	Optimized object files are under opt/ and debug
+	object files are under dbg/. The debug txr executable
+	is called txr-dbg.
+
+	* Makefile (CFLAGS): $(OPT_FLAGS) is omitted from CFLAGS,
+	so we can expand it where appropriate.
+	(ADD_CONF, EACH_CONF): New variables, used as macros.
+	(DBG_OBJS, OPT_OBJS): New variables.
+	(dbg/%.o, opt/%.o): New rules.
+	(all): New target.
+	($(PROG)-dbg): New target.
+	(clean): Remove the object directories with rm -rf.
+	Remove $(PROG)-dbg.
+	(depend): Pass $(OPT_OBJS) and $(DBG_OBJS) to depend.txr
+	Also: various target-specific assignments for object files
+	had to be split for rel and dbg.
+
+	* depend.txr: Updated to handle dbg/ or rel/ prefix on
+	object file paths.
+
+	* dep.mk: Regenerated.
+
+2014-12-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (clean): add tests.clean as prerequisite.
+	(tests): Add tests.clean as prerequiste, remove rm command.
+	(retest, tests.clean): New rules.
+
+2014-12-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (tests/009/json.out): Use eager assignment
+	intead of lazy assignment to set TXR_ARGS.
+
+2014-12-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (TXR): New variable. We use this to run txr
+	rather than ./$(PROG). This way we can override the variable
+	from the command line if necessary.
+	(TESTS): Variable removed.
+	(TESTS_OUT, TESTS_OK): New variables, replace TESTS.
+	(tests): Prerequisites is now $(TESTS_OK), which are
+	actual timestamp files. Also depends on $(PROG).
+	(tests/%/%): Target specific assignments are now for .out
+	targets rather than .ok targets.
+	(%.out): New pattern target, made from half of previous %.ok rule.
+	(%.ok): Smaller rule, only performs diff between .out and .expected,
+	and touches the .ok stamp.
+	(%.expected): Bugfix: this rule now just copies .out to .expected,
+	and its prerequisite is %.out rather than %.txr.
+	Previously it tried to run txr, but it wouldn't use the correct
+	options, which depended on the target-specific assignments for
+	various .ok files.
+	(install-tests): Bugfix: in the "make -s -n" call use the new TXR
+	variable to specify the program's path. This fixes the issue that ./
+	was prepended to the txr commands, resulting in nonworking run.sh.
+	(txr-manpage.html): Use TXR to invoke txr rather than PROG.
+
+2014-12-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: Adding empty .SUFFIXES: to disable built-in suffixes.
+	Also set MAKEFLAGS to disable all built-in rules.
+	The only one rule we used is .c to .o, so we provide it ourselves.
+
+2014-11-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register lequal and gequal.
+
+	* lib.c (lequal, gequal, lequalv, gequalv): New functions.
+
+	* lib.h (lequal, gequal, lequalv, gequalv): Declared.
+
+	* txr.1: Documented lequal and gequal.
+
+	* txr.vim, tl.vim: Regenerated.
+
+2014-11-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register less and greater to
+	the lessv and greaterv functions instead of less and greater.
+
+	* lib.c (lessv, greaterv): New functions.
+
+	* lib.h (lessv, greaterv): Declared.
+
+	* txr.1: Document variadic nature of less and greater.
+
+2014-11-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register sort-group.
+
+	* lib.c (sort_group): New function.
+
+	* lib.h (sort_group): Declared.
+
+	* txr.1: Documented.
+
+2014-11-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (partition_star_func): Bugfix: doing rplaca(env, seq)
+	too early, before the loop which adjusts its value.
+	Restructuring this slightly to avoid duplicated code, by moving the
+	!first check later.
+
+2014-11-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (partition_by_func): Rename one local variable for clarity.
+	Remove unessential variable last, and move the next variable
+	into loop scope.
+
+2014-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (wrap_star, wrap): New functions.
+
+	* eval.c (eval_init): Registered wrap and wrap* intrinsics.
+
+	* lib.h (wrap_star, wrap): Declared.
+
+	* txr.1: wrap and wrap* documented.
+
+2014-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (succ, ssucc, sssucc, pred, ppred, pppred): New functions.
+
+	* eval.c (eval_init): Register new functions as intrinsics.
+
+	* lib.h (succ, ssucc, sssucc, pred, ppred, pppred): Declared.
+
+	* txr.1: Documented.
+
+2014-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (where): Argument order reversed, with compat support.
+
+	* lib.h (where): Declaration updated.
+
+	* txr.1: Documented.
+
+2014-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (sel): Accept a function in place of the index list.
+
+	* txr.1: Documented.
+
+2014-11-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (split_str): If the separator string is empty,
+	then unless opt_compat is 100 or less, provide a more
+	consistent behavior, rather than splitting the string
+	into characters. This latter behavior was never documented.
+
+	* txr.1: Documented.
+
+	* dep.mk: Updated.
+
+2014-11-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (max2, min2): Use the less comparison function
+	for generic semantics.
+
+	* lib.h (max2, min2): Parameter names changed to avoid suggesting
+	that the operands are numbers.
+
+	* txr.1: Documentation for min and max updated.
+
+2014-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (opip_s, oand_s, chain_s, chand_s): New global variables.
+	(macro_form_p): Forward declaration added.
+	(me_opip): New static function.
+	(eval_init): Intern new symbols, register opip and oand macros
+	to me_opip function. Use chain_s and chand_s in registration
+	for chain and chand.
+
+	* txr.1: Document opip and oand
+
+	* tl.vim, txr.vim: Regenerated.
+
+2014-11-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (sub, ref, refset, replace, update, search_list):
+	Fix cut and paste problem: type_mismatch argument expression
+	referring to the C function cons rather than the intended
+	object seq.
+
+2014-11-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register chand intrinsic.
+
+	* lib.c (do_chand): New static function.
+	(chandv): New function.
+
+	* lib.h (chandv): Declared.
+
+	* txr.1: Documented chand.
+
+2014-11-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow then-func to be omitted in iff. Cleanup.
+
+	* eval.c (eval_init): Register iff as requiring only one arg.
+
+	* lib.c (do_iff): Do not check thenfun for nil. Just call it.
+	(iff): Default thenfun to identity.
+
+	* txr.1: Documentation updated.
+
+2014-11-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (iff): Bugfix: forgotten handling of default
+	argument, resulting in : symbol being called as a function.
+
+	* txr.1: Removing description of situation when the then-function
+	argument of iff or iffi is specified as nil. This is deprecated
+	behavior which can be obtained by using the false function.
+
+2014-10-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	New macros tb and tc.
+
+	* eval.c (me_tb, me_tc): New static functions.
+	(eval_init): Registered tb and tc macros.
+
+	* txr.1: Documented tb and tc.
+
+2014-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (chk_grow_vec): New function.
+	(string_extend): Use chk_grow_vec.
+	(vec_set_length): Avoid subtractions for comparing numbers.
+
+	* lib.h (chk_grow_vec): Declared.
+
+	* stream.c (snarf_line, string_out_put_string): Use chk_grow_vec.
+
+2014-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing finalization hooks.
+
+	* gc.c (struct fin_reg): New struct type.
+	(final_list, final_tail, mark_makefresh): New static variables.
+	(mark_obj): Under generational GC, if make_makefresh is in
+	effect, set the generation to -1 on all marked objects.
+	(sweep_one): In an EXTRA_DEBUGGING  build, call breakpt
+	if the object being swept is the one in break_obj.
+	Under generational GC, place reachable objects that are
+	in generation -1 the freshobj nursery and assign them to generation 0,
+	rather than sticking them into the mature generation 1.
+	(sweep): Under generational gc, reset the freshobj_idx variable
+	here, so that sweep_one has an empty nursery in which
+	to place the generation -1 objects.
+	(prepare_finals, call_finals): New static functions.
+	(gc): Call prepare_finals before sweep, and call call_finals
+	just before re-enabling GC and returning. Do not reset freshobj_idx to
+	zero; this was done in sweep, which may have added entries into it.
+	(gc_finalize): New function.
+	(gc_late_init): Register gc_finalize as intrinsic function finalize.
+
+	* txr.1: Documented finalize.
+
+	* HACKING: Documented finalization, described the additional
+	meaning of the -1 generation, and added a section on debugging with
+	break_obj and breakpt.
+
+2014-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.h (break_obj): Missing extern added on declaration.
+	This broke C++ compilation with -DEXTRA_DEBUGGING turned on.
+
+2014-10-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Vim syntax coloring for standalone TXR Lisp (*.tl) files.
+
+	* genvim.txr (generate): New pattern function, contains
+	generation logic so we can do it twice.
+
+	* txr.vim: Regenerated.
+
+	* tl.vim: New file.
+
+2014-10-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (type_check): Function moved to header file inline.
+	(throw_mismatch): New function.
+
+	* lib.h (throw_mismatch): Declared.
+	(type_mismatch): Declaration turned into inline function.
+
+2014-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_begin): Use coerce macro instead of raw C cast.
+	Use cobj_handle so hash argument is validated.
+
+	* parser.l (YY_INPUT): Use convert macro instead of raw C cast.
+
+2014-10-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	GNU Flex's libfl library provides nothing.  Let us not refer to it. It
+	only causes build issues on some systems where it is not provided
+	in the standard location, or is not cross-compiled properly.
+
+	* Makefile (LEXLIB): Reference to variable removed.
+
+	* configure (lexlib): Variable removed.
+	(LEXLIB): config.make variable not generated.
+
+	* parser.l (yywrap): Provide this trivial function as inline.
+
+2014-10-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: Removing trailing spaces.
+	(GREP_CHECK): New macro.
+	(enforce): Rewritten using GREP_CHECK, with new checks.
+
+	* arith.c, combi.c, debug.c, eval.c, filter.c, gc.c, hash.c, lib.c,
+	* lib.h, match.c, parser.l, parser.y, rand.c, regex.c, signal.c,
+	* signal.h, stream.c, syslog.c, txr.c, unwind.c, utf8.c: Remove
+	trailing spaces.
+
+2014-10-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Fix incorrect, registration of
+	repeat; it must have one optional argument.
+
+2014-10-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 100.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+2014-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Ensure that a hash reorganization doesn't take place
+	during a traversal, which could cause items to be visited
+	twice or skipped.
+
+	* gc.c (full_gc): Changed from static to exter (full_gc): Changed to
+	internal linkage.
+
+	* gc.h (full_gc): Declared.
+
+	* hash.c (struct hash): New member, usecount.
+	(struct hash_iter): New member, next.
+	(reachable_iters): New static variable.
+	(hash_mark): Reset the usecount of every reachable hash table.
+	(hash_iter_mark): Add every reachable iterator to reachable_iters
+	list.
+	(make_hash, make_similar_hash, copy_hash): Initialize usecount.
+	(gethash_c): Do not call hash_grow if usecount is nonzero.
+	(hash_begin): Initialize next field of hash_iter to null.
+	Increment use count on hash table.
+	(hash_next): When traversal ends, release use count, and
+	null out the hash table reference.
+	(do_weak_tables): New static function.
+	(do_iters): New static function.
+	(hash_process_weak): Weak hash processing logic moved
+	to do_weak_tables. Also calls do_iters.
+
+	* txr.1: Describe hash table traversal, and the assurances
+	and caveats about inserting and deleting items.
+
+2014-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (interp_fun): If the function doesn't have
+	specials, then don't bother saving and restoring dynamic
+	env around the argument binding and evaluation.
+
+2014-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register notf intrinsic function.
+
+	* lib.c (do_not): New static function.
+	(notf): New function.
+
+	* lib.h (notf): Declared.
+
+	* txr.1: Documented notf.
+
+	* share/txr/stdlib/txr-case.txr (bindable): Eliminated.
+	(txr-if): Use functional expression, taking advantage of notf.
+
+	* txr.vim: Regenerated.
+
+2014-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* share/txr/stdlib/txr-case.txr: New file.
+
+	* txr.1: Document txr-if, txr-when and txr-case.
+
+	* genvim.txr: Added new macro names.
+
+	* tests/011/txr-case.expected: New file.
+
+	* tests/011/txr-case.txr: New file.
+
+	* txr.vim: Regenerated.
+
+2014-10-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Source file inclusion implemented: needed for macros.
+
+	* match.c (include_s): New symbol variable.
+	(v_load): Function extended to handle include semantics.
+	(include): External wrapper function for doing inclusion
+	via v_load.
+	(syms_init): include_s initialized.
+
+	* match.h (include_s): Declared.
+	(include): Declared.
+
+	* parser.y (check_for_include): New static function.
+	(clauses_rev): Use check_for_include to replace @(include ..)
+	directive.
+
+	* txr.1: Documented include.
+
+	* genvim.txr: Added include symbol.
+
+	* txr.vim: Regenerated.
+
+2014-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_fun): Bugfix: replace incorrect plain return
+	with debug_return. This causes a stray debug frame to be left
+	on the environment stack which turns to garbage, leading to
+	an invalid longjmp in another debug_return elsewhere
+	which tries to use that frame. This was diagnosed by valgrind
+	indicating accesses below the stack frame, and also by glibc
+	"longjmp causes uninitialized stack frame" abort.
+
+2014-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (lisp_parse): Bugfix: the error_stream argument
+	must be checked to be a stream before we plant it in place
+	of std_error, otherwise we will get a type exception thrown
+	lower down, which leads to runaway recursion as TXR tries
+	to print the error messages on std_error.
+
+	* dep.mk: Regenerated.
+
+2014-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (r_exprs): New grammar symbol. r_exprs uses
+	left-recursive rules to avoid filling the yacc stack, and
+	returns the items in reverse order. The output of each
+	r_exprs-generating rule consists of a list which gives
+	the terminating atom, and then the list contents in reverse order.
+	(n_exprs): Becomes wrapper for r_exprs which deals with
+	the terminating atom, and reversed items.
+
+2014-10-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Allow TXR to support large programs, and efficiently so.
+	(clauses_rev): New grammar symbol. Uses a left-recursive rule that
+	does not consume an amount of parser stack proportional to the number
+	of clauses, and sticks to efficient consing, which means that
+	the list is built up in reverse.
+	(clauses): Now just a wrapper rule for clauses_rev which nreverses
+	its output.
+	(clauses_opt): Retargetted to use clauses_rev instead of clauses,
+	and reverse its output.
+
+2014-10-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Deal with situation when GC is disabled and the freshobj array runs out
+	of room.  This could happen when parsing a really large TXR program,
+	since gc is disabled during parsing. Currently it asserts, which
+	is not acceptable.
+
+	* gc.c (make_obj): If after gc, the freshobj array has not been
+	emptied (obviously because gc is disabled), do not assert.
+	Rather, set the full_gc flag to request a full garbage collection
+	when gc is re-enabled.  Furthermore, only place newly allocated objects
+	into freshobj if full_gc has not been set. Thus, if we exhaust the
+	freshobj array while gc is off, the full_gc flag is set, and we
+	discontinue use of that array. When gc is re-enabled, we will do a full
+	gc pass. A full gc pass ignores freshobj array, so it doesn't matter
+	that its use was discontinued.
+
+2014-10-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (mf_all): Drop data_lineno parameter. Initialize
+	the corresponding member based on whether or not data is nil.
+	(do_match_line, mf_from_ml, match_filter, match_fun, extract):
+	Do not pass starting line number argument to mf_all.
+	This fixes a bug when the line number at @(eof) for an empty
+	file comes out as zero.
+	(mf_args, v_skip, v_fuzz, v_next, v_gather, v_collect,
+	open_data_source, match_files): Use zero and one instead of num(0) and
+	num(1).
+
+2014-10-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_eof): Bugfix: we are at EOF not only when
+	the remaining data is nil but when it is (nil). This
+	happens for interactive streams.
+
+2014-10-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (dest_bind): Remove the restriction of not allowing
+	@(expr ...) and @var on the left side of a bind. This
+	is useful, and necessary for @(line @(lisp expr)) to work:
+	matching computed line numbers and character positions.
+
+	* txr.1: Document use of Lisp on left hand side of bind,
+	that there is a restriction on the left hand side of a set,
+	and that Lisp can be used in a line or chr directive for
+	computed matches.
+
+2014-10-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: New section Type Safety.
+	Table of contents regenerated with line numbers.
+
+	* HACKING-toc.txr: New file.
+
+2014-10-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Converting cast expressions to macros that are retargetted
+	to C++ style casts when compiling as C++.
+
+	* lib.h (strip_qual, convert, coerce): New casting macros.
+	(TAG_MASK, tag, type, wli_noex, auto_str, static_str,
+	litptr, num_fast, chr, lit_noex, nil, nao): Use cast macros.
+
+	* arith.c (mul, isqrt_fixnum, bit): Use cast macros.
+
+	* configure (INT_PTR_MAX): Define using cast macro.
+
+	* debug.c (debug_init): Use cast macro.
+
+	* eval.c (do_eval, expand_macro, reg_op, reg_mac, eval_init):
+	Use cast macros.
+
+	* filter.c (filter_init): Use cast macro.
+
+	* gc.c (more, mark_obj, in_heap, mark, sweep_one, unmark): Use
+	cast macros.
+
+	* hash.c (hash_double, equal_hash, eql_hash, hash_equal_op,
+	hash_hash_op, hash_print_op, hash_mark, make_hash, make_similar_hash,
+	copy_hash, gethash_c, gethash, gethash_f, gethash_n, remhash,
+	hash_count, get_hash_userdata, set_hash_userdata, hash_iter_destroy,
+	hash_iter_mark, hash_begin, hash_uni, hash_diff, hash_isec): Use
+	cast macros.
+
+	* lib.c (code2type, chk_malloc, chk_malloc_gc_more, chk_calloc,
+	chk_realloc, chk_strdup, num, c_num, string, mkstring, mkustring,
+	upcase_str, downcase_str, string_extend, sub_str, cat_str, trim_str,
+	c_chr, vector, vec_set_length, copy_vec, sub_vec, cat_vec,
+	cobj_print_op, obj_init): Likewise.
+
+	* match.c (do_match_line, hv_trampoline, match_files, dir_tables_init):
+	Likewise.
+
+	* parser.l (grammar): Likewise.
+
+	* parser.y (parse): Likewise.
+
+	* rand.c (make_state, make_random_state, random_fixnum, random):
+	Likewise.
+
+	* regex.c (CHAR_SET_L2_LO, CHAR_SET_L2_HI, CHAR_SET_L1_LO,
+	CHAR_SET_L1_HI, CHAR_SET_L0_LO, CHAR_SET_L0_HI, L0_full, L0_fill_range,
+	L1_full, L1_fill_range, L1_contains, L1_free, L2_full, L2_fill_range,
+	L2_contains, L2_free, L3_fill_range, L3_contains, L3_free,
+	char_set_create, char_set_cobj_destroy, nfa_state_accept,
+	nfa_state_empty, nfa_state_single, nfa_state_wild, nfa_state_set,
+	nfa_free, nfa_run, regex_destroy, regex_mark, dv_compile_regex,
+	reg_derivative, regex_compile, regex_print, regex_run,
+	regex_machine_init): Likewise.
+
+	* signal.c (sig_mask): Likewise.
+
+	* stream.c (make_null_stream, stdio_stream_print, stdio_stream_destroy,
+	stdio_stream_mark, stdio_maybe_read_error, stdio_maybe_error,
+	stdio_put_char_callback, stdio_get_char_callback, stdio_put_string,
+	stdio_put_char, stdio_put_byte, stdio_flush, stdio_seek,
+	stdio_get_prop, snarf_line, stdio_get_line, stdio_get_char,
+	stdio_get_byte, stdio_unget_char, stdio_unget_byte, stdio_close,
+	tail_strategy, pipe_close, string_in_stream_mark, string_in_get_line,
+	string_in_get_char, string_in_unget_char, string_in_get_prop,
+	byte_in_stream_destroy, byte_in_get_byte, byte_in_unget_byte,
+	string_out_stream_destroy, string_out_byte_callback,
+	string_out_byte_flush, string_out_put_string, string_out_put_char,
+	string_out_put_byte, strlist_mark, strlist_out_put_string,
+	strlist_out_put_char, make_strlist_output_stream, get_list_from_stream,
+	dir_get_line, dir_close, make_stdio_stream_common, make_pipevp_stream,
+	make_string_input_stream, make_string_byte_input_stream,
+	make_string_output_stream, get_string_from_stream, make_dir_stream,
+	stream_set_prop, stream_get_prop, close_stream, get_line, get_char,
+	get_byte, unget_char, unget_byte, vformat, put_string, put_char,
+	put_byte, flush_stream, seek_stream, open_tail, open_process, run,
+	cat_stream_print, cat_get_line, cat_get_char, cat_get_byte,
+	cat_unget_byte, cat_unget_char, cat_get_prop, cat_mark,
+	make_catenated_stream): Likewise.
+
+	* sysif.c (getcwd_wrap): Likewise.
+
+	* syslog.c (syslog_mark, syslog_put_string, syslog_put_char,
+	syslog_put_byte, syslog_get_prop, syslog_set_prop, make_syslog_stream):
+	Likewise.
+
+	* txr.c (get_self_path): Likewise.
+
+	* unwind.c (uw_init): Likewise.
+
+	* utf8.c (utf8_from_uc, utf8_to_uc, utf8_to, utf8_dup_from_uc,
+	utf8_dup_from, utf8_dup_to, utf8_decode): Likewise.
+
+2014-10-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Purge stray occurrences of "void *" from code base.
+
+	* lib.c (cobj_print_op): In the format call, cast
+	the C pointer to val, since the ~p conversion now
+	takes a val rather than void *.
+	(cptr_equal_op, obj_print, obj_pprint): Remove cast to
+	void *, since obj now already has the type that ~p expects.
+
+	* lib.h (struct any): Use mem_t * instead of void *.
+
+	* parser.h (yyscan_t): Repeat the definition from inside
+	the Flex-generated lex.yy.c.
+	(yylex_init, yylex_destroy, yyget_extra, yyset_extra): Re-declare
+	using yyscan_t typedef in place of void *.
+
+	* parser.l (yyget_column, yyerrprepf): Re-declare using yyscan_t.
+	(grammar): Use yyg in place of yyscanner in calls to yyerrprepf.
+
+	* parser.y (yylex, %lex-param): Use yyscan_t instead of void *.
+	(parse): Use yyscan_t for local variable.
+
+	* signal.c (stack): Change type from void * to mem_t *.
+
+	* stream.c (vformat): Conversion specifier p extracts val
+	instead of void *.
+	(run): Use casts that only remove const, not all the way to void *.
+
+	* txr.1: Documented p conversion specifier of format.
+
+	* Makefile (OBJS-y): Initialize with := to make sure it is a
+	simple variable, and not a macro.
+	(SRCS): New variable, listing source files.
+	(enforce): New rule for enforcing coding conventions.
+	Currently checks for void * occurrences.
+
+2014-10-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (gcd): Fix semantics. If either operand is
+	zero, return the other operand.
+	(lcm): New function.
+
+	* eval.c (eval_init): Retarget registration of gcd to
+	variable argument gcdv function. Register lcm.
+
+	* lib.c (gcdv, lcmv): New functions.
+
+	* lib.h (gcdv, lcm, lcmv): Declared.
+
+	* txr.1: Re-document gcd with coverage of lcm.
+
+	* txr.vim: Regenerated.
+
+2014-10-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (gcd, lognot): Bugfix: bignum results
+	in fixnum range not normalized.
+
+2014-10-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (dest_bind): More detailed log message for variable
+	mismatch.
+
+2014-10-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	New @(line) and @(chr) directives.
+
+	* match.c (line_s): New variable.
+	(h_chr, v_line): New static functions.
+	(syms_init): line_s initialized.
+	(dir_tables_init): Register v_line and h_chr.
+
+	* match.h (line_s): Declared.
+
+	* txr.1: Document @(line) and @(chr) directives.
+
+	* txr.vim: Regenerated.
+
+2014-10-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (subst_vars): Fix buggy rendering of TXR Lisp expressions
+	that evaluate to lists. For instance `@(list)` renders to the
+	string "nil", and `@(list 1 2)` renders as "(1 2)". The desired
+	behavior is "" and "1 2", respectively.
+	(do_output_line): In output directives, there is a similar problem.
+	A @(list) in the middle of an output block turns to nil, and
+	a @(list 1 2) renders in parentheses as (1 2).  Furthermore,
+	there is the additional problem that no filtering is applied
+	to the interpolated value. These behaviors are subject to the
+	compatibility option, since they change the externally visible
+	behavior of TXR programs.
+
+	* txr.1: Document that empty lists in @(output) variable substitutions
+	turn into nothing. Document value of 100 for -C option, describing
+	the above issue.
+
+2014-10-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	More type safety, with help from C++ compiler.
+
+	* parser.h (scanner_t): New typedef. Cleverly, we use
+	yyguts_t as the basis for this, which pays off in
+	a few places, getting rid of conversions.
+	(parser_t): scanner member redeclared to scanner_t *.
+	(yyerror, yyerr, yyerrof, end_of_regex, end_of_char):
+	Declarations updated.
+
+	* parser.l (yyerror, yyerrorf, num_esc): scanner argument becomes
+	scanner_t * instead of void *.
+	(yyscanner): Occurrences replaced by yyg: why should we
+	refer to the type-unsafe void *yyscanner, when we know that
+	in the middle of the yylex function we have the properly
+	typed yyguts_t *yyg.
+	(end_of_regex, end_of_char): Argument changes to scanner_t * and name
+	strategically changes to yyg, eliminating the local variable and cast.
+
+	* parser.y (sym_helper): scanner argument becomes
+	scanner_t * instead of void *.
+	(%parse-param}: void *scnr becomes scanner_t *scnr.
+	(define-transform, yybadtoken): Use scanner_t * instead of void *.
+	(parse): Since yylex_init takes a void **, we use it to initialize
+	a local void *, and then assign it to the structure member.
+
+2014-10-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	C++ upkeep.
+
+	TXR's support for compiling as C++ pays off:  C++ compiler finds
+	serious bugs introduced in August 2 ("Big switch to reentrant lexing
+	and parsing"). The yyerror function was being misused; some of
+	the calls reversed the scanner and parser arguments. Since one
+	of the two parameters is void *, this reversal wasn't caught.
+
+	* parser.l (yyerror): Fix first two arguments being
+	reversed.
+	(num_esc): Change previously correct call to yyerror to follow reversed
+	arguments, so that it stays correct.
+
+	* parser.y (%parse-param): Change order of these directives
+	so that the scnr parameter is before the parser parameter.
+	This causes the yacc-generated calls to yyerror to have
+	the arguments in the correct order.  It also has the
+	effect of changing the signature of yyparse, reversing its parameters.
+	(parse): Update call to yyparse to new argument order.
+
+	* parser.h (yyparse): Declaration removed.
+	(yyerror): Declaration updated.
+
+	* regex.c (regex_kind_t): New enum typedef.
+	(struct regex): Use regex_kind_t rather than an enum
+	inside the struct, which has different scoping rules
+	under C++.
+
+	* txr.c (get_self_path): Fix signed/unsigned warning.
+
+2014-10-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Round of fixes.
+
+2014-10-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register greater function as intrinsic.
+
+	* lib.c (gt_f, lt_f): Global variables removed.
+	(greater_f): New variable.
+	(greater): New function.
+	(find_max, pos_max): Use greater_f as default for testfun,
+	rather than gt_f.
+	(find_min, pos_min): Use less_f as default for testfun,
+	rather than lt_f.
+	(obj_init): Remove references to gt_f and lt_f.
+	GC-protect and initialize greater_f.
+
+	* lib.h (greater_f): Declared.
+	(gt_f, lt_f): Declarations removed.
+
+	* txr.1: Documented greater, and use of less and greater
+	in pos-min, pos-max, find-min and find-max.
+
+	* txr.vim: Regenerated.
+
+2014-10-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr (sortuniq): Remove unnecessary function,
+	since (sortuniq list) can be done as (sort (uniq list)).
+
+2014-10-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (merge_wrap): New static function
+	(eval_init): Register less as intrinsic.  Retarget merge intrinsic to
+	merge_wrap for proper argument defaulting which is missing from merge,
+	and which we don't want to introduce there since internal calls
+	to merge don't erquire it. Change registration of sort so it has
+	only one required argument, not two.
+
+	* lib.c (less_f): New global variable.
+	(less_tab): New static array.
+	(less_tab_init): New static function.
+	(less): New function.
+	(sort): Default lessfun argument to the less function.
+	(obj_init): GC-protect the less_f variable.
+	Initialize it with a function object made from the less function.
+	(init): Call less_tab_init.
+
+	* lib.h (enum type): New enumeration member MAX_TYPE, an alias
+	for the largest type.
+	(less_f, less): Declared.
+
+	* txr.1: Documented new less function, and that the lessfun
+	argument in sort and merge is optional, defaulting to less.
+
+	* txr.vim: Regenerated.
+
+2014-10-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register chr_isblank and chr_isunisp as
+	intrinsics.
+
+	* lib.c (chr_isblank, chr_isunisp): New functions.
+
+	* lib.h (chr_isblank, chr_isunisp): Declared.
+
+	* regex.h (spaces): Declaration for existing variable added.
+
+	* txr.1: Documented chr-isblank and chr-isunisp.
+
+	* genvim.txr: Add missing sysif.c.
+
+	* txr.vim: Regenerated.
+
+2014-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix gc safety issue in abs_path_p function.
+
+	* stream.c (ap_regex): New static variable.
+	(abs_path_p): Remove local reg variable; replace
+	uses of reg with ap_regex.
+	(stream_init): gc-protect ap_regex.
+
+2014-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (stream_init): No need to gc-protect
+	std_input, std_output, std_debug, std_error and std_null.  These are
+	not ordinary variables but macros which expand to locations in the
+	variable binding environment that are already protected.  This call was
+	actually doing nothing, because the symbol involved in the expression
+	std_input is not  yet initialized and so &std_input yields a null
+	pointer which causes protect to bail.
+
+2014-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Moving system interface functions to separate module out of
+	the eval and stream modules.
+
+	* Makefile (OBJS): Add sysif.o.
+
+	* dep.mk: Regenerated.
+
+	* eval.c (errno_wrap, daemon_wrap, exit_wrap, usleep_wrap, getpid_wrap,
+	getppid_wrap, env_hash): Functions moved to sysif.c and changed
+	to static functions.
+	(eval_init): Registrations of functions moved to sysif.c.
+
+	* lib.c (init): Call sysif_init.
+
+	* stream.c (w_stat, statf, mkdir_wrap, chdir_wrap, getcwd_wrap,
+	makedev_wrap, minor_wrap, major_wrap, mknod_wrap): Functions
+	moved to sysif.c and become static functions.
+	(stream_init): Registration of stat moved to sysif.c.
+	(open_files, open_files_star): Bugfix: no longer erroneously included
+	in #ifdef HAVE_UNISTD_H block.
+
+	* stream.h (mkdir_wrap, chdir_wrap, getcwd_wrap, makedev_wrap,
+	minor_wrap, major_wrap, mknod_wrap, symlink_wrap, link_wrap,
+	readlink_wrap): Declarations removed.
+
+	* sysif.c: New file.
+
+	* sysif.h: New file.
+
+2014-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Add test case for recent breakage.
+
+	* tests/006/freeform-3.expected: New file.
+
+	* tests/006/freeform-3.txr: New file.
+
+	* tests/006/passwd: New file.
+
+	* Makefile (TXR_ARGS): Set up for new test case.
+
+2014-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix 2011-12-03 regression. The freeform directive code
+	relies on lazy_str_get_trailing_list and the behavior
+	of that function changed because (split-str "" any-separator)
+	changed from returning nil to returning the empty string.
+	The resulting behavior change of lazy_str_get_trailing_list was later
+	described in the documentation, thereby codifying it.
+
+	This patch changes the lazy_str_get_trailing_list behavior,
+	which is poor, and causes infinite looping. We do not want
+	an extra empty string prepended, because it looks like
+	a spurious line.
+
+	* lib.c (lazy_str_get_trailing_list): if split_str produces
+	a the list (""), then just return the unmaterialized list from
+	the lazy string without prepending that one-element list to it.
+
+	* txr.1: Updated documentation for lazy-str-get-trailing-list.
+
+2014-10-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 99.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+	* Makefile: Improve binary packaging rules.
+
+	* regex.c: #include <stdarg.h> added.
+
+2014-10-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Printing of regular expression objects implemented.
+
+	* regex.c (regex_print): New static function.
+	(regex_obj_ops): Registered regex_print.  (print_class_char,
+	paren_print_rec, print_rec): New static functions.
+
+	* dep.mk: Regenerated.
+
+2014-10-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Keep regex source code in regex objects, in anticipation
+	of pretty-printing. Fix object construction bugs.
+
+	* regex.c (struct regex): New member, source.
+	(regex_mark): Ensure source is visited by garbage collector.
+	(regex_compile): Store regex_sexp in source.
+	Fix violations of section 3.2 of HACKING document.
+
+2014-10-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Eliminating the extra list wrapping applied to regular
+	expression objects in the syntax tree. The parser
+	just puts out a #<regex ...> instead of (#<regex ...> regex-syntax).
+
+	* eval.c (do_eval): We no longer need the hack of
+	treating (#<regex> ...) as a special form which
+	evaluates to #<regex>.
+	(expand): We no longer have to skip over regex syntax,
+	so the case is removed.
+
+	* match.c (h_var, do_txeval, do_match_line): regexp cases are no longer
+	subcases of consp but stand on their own. In do_match_line, we
+	introduce a COBJ case into the type switch for regexes.
+
+	* parser.y: regexes are now compiled in the regex and lisp_regex
+	grammar rules instead of the dependent rules, and are not wrapped in
+	extra syntax.
+
+2014-10-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_var): Fix regression introduced in 2014-08-11
+	commit. The incompleteness of that change broke the case of an unbound
+	variable followed by a bound variable. The value of the
+	second variable was still being wrapped in the old complicated
+	representation before being pushed to the front of the spec.
+
+	* txr.1: Replace bogus text which says that variables are not
+	bound to regexes, and so regex matches from variable substitutions
+	do not arise. This works fine after this change.
+
+2014-10-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: rules that rely on values from config.make
+	now have config.make as a prerequisite.
+
+2014-10-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Using unified COBJ representation for both regex kinds,
+	rather than the list-based notation for derivative-based
+	regexes, and an encapsulated COBJ for NFA-based regexes.
+
+	* lib.c (compiled_regex_s): Variable removed.
+	(obj_init): Initialization of compiled_regex_s removed.
+
+	* lib.h (compiled_regex_s): Declaration removed.
+
+	* regex.c (struct regex, regex_t): New type.
+	(regex_destroy): Object is now a regex_t, not nfa_t.
+	(regex_mark): New function.
+	(regex_obj_ops): Register regex_mark operation.
+	(reg_nullable, reg_derivative): Remove cases that handles
+	compiled_regex_s.
+	(regex_compile): Output of dv_compile_regex becomes
+	a cobj nwo. Output of nfa_compile_regex must be
+	embedded in regex_t structure.
+	(regexp): Drop the check for compiles_regex_s.
+	(regex_nfa): Function removed.
+	(regex_run, regex_machine_init): Use cobj_handle to retrieve regex_t *
+	pointer and dispatch appropriate code based on regex->kind.
+
+2014-09-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Add PayPal donation button.
+
+	* txr.1: Avoid escapes at the end of a line; man2html doesn't
+	handle this properly.
+
+2014-09-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: TXR is now bolded in the title.
+
+	* txr.1: More formatting and wording fixes.
+
+2014-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (do_and): Fix andf again: (andf) not producing
+	a function that returns t, as documented.
+
+2014-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 98.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+	* dep.mk, txr.vim: Regenerated.
+
+2014-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Substantially revised with rich troff markup,
+	and restructured in some places.
+
+	* genman.txr: No longer generate the whole document in
+	monospaced font. Add hyperlinks.
+
+2014-09-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (do_and, do_or): Fix broken andf and orf,
+	lacking the semantics of returning the last value,
+	or the first true value, respectively.
+
+2014-09-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (txr-manpage.pdf): New target.
+
+2014-09-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (compat_fixup): void return changed to int.
+	Returns minimum supported emulation.
+
+	* lib.h (compat_fixup): Declaration fixed.
+
+	* txr.c (compat): Replace hard-coded min version
+	by return value of compat_fixup.
+
+2014-09-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (help): List new --compat option.
+	(requires_arg, do_fixnum_opt, compat, array_dim, gc_delta): New static
+	functions.
+	(txr_main): Use do_fixnum_opt for handling options with integer
+	argument. Add --compat alias for -C.
+
+	* txr.1: Documented --compat. Added missing description of --debugger.
+
+2014-09-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): Cleaning up option handling code.
+	Better checking for misused long options.
+
+2014-09-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register intrinsic partition* function.
+
+	* lib.c (partition_star_func): New static function.
+	(partition_star): New function.
+
+	* lib.h (partition_star): Declared.
+
+	* txr.1: Documented partition*.
+
+2014-09-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register intrinsic partition function.
+
+	* lib.c (partition_func): New static function.
+	(partition): New function.
+
+	* lib.h (partition): Declared.
+
+	* txr.1: Documented partition.
+
+2014-09-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (help): Revised help text.
+
+2014-09-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (MALLOC_DELTA_THRESH): Macro remaned to DFL_MALLOC_DELTA_THRESH.
+	(opt_gc_delta): New global variable.
+	(make_obj): Use opt_gc_delta rather than MALLOC_DELTA_THRESH.
+	(gc_set_delta, gc_wrap): New static functions.
+	(gc_late_init): New function.
+
+	* gc.h (gc_late_init): Declared.
+
+	* genvim.txr: scan gc.c also.
+
+	* lib.c (init): call gc_late_init.
+
+	* txr.1: Document new --gc-delta option and the functions
+	gc and gc-set-delta.
+
+	* txr.c (help): Help text for --gc-delta.
+	(txr_main): Parse --gc-delta option.
+
+	* txr.h (opt_gc_delta): Declared.
+
+2014-09-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Make the garbage collector aware of malloced bytes, to
+	prevent skyrocketing memory use when the program manipulates
+	heap objects that have large amounts of malloc memory
+	attached, like very large bignums.
+
+	* gc.c (MALLOC_DELTA_THRESH): New preprocessor symbol.
+	(prev_malloc_bytes): New static variable.
+	(make_obj): when the value of malloc_bytes jumps by MALLOC_DELTA_THRESH
+	or more since the last gc, trigger gc.
+
+2014-09-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (symbol_setname): New static function.
+	(obj_init): Change exception symbol names with underscores
+	to use friendly dashes instead.
+	(compat_fixup): New function.
+
+	* lib.h (compat_fixup): Declared.
+
+	* txr.1: Change occurrences of exception symbols from
+	underscores to dashes.
+
+	* txr.c (txr_main): Call compat_fixup when -C option
+	is processed.
+
+2014-09-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Document -C option.
+
+	* txr.c (opt_compat): New global variable.
+	(help): Describe -C option.
+	(txr_main): Process -C, and set opt_compat.
+	Ensure -C does not clump.
+
+	* txr.h (opt_compat): Declared.
+
+2014-09-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Update registration of lisp-parse and read
+	to account for new parameter.
+
+	* lib.c (syntax_error_s): New symbol_variable.
+	(obj_init): New symbol variable initialized.
+
+	* lib.h (syntax_error_s): Declared.
+
+	* parser.h (lisp_parse): Declaration updated.
+
+	* parser.l (lisp_parse): Takes third parameter.
+
+	* txr.1: Third parameter of read described.
+
+	* txr.c (txr_main): Pass colon_k to third parameter of lisp_parse
+	to obtain exception throwing behavior.
+
+	* unwind.c (uw_init): Register syntax-error as subtype of error.
+
+2014-09-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (arith_init): Register some variables: *flo-dig*,
+	*flo-min*, *flo-max*, *flo-epsilon*, *pi* and *e*.
+
+	* genvim.txr: Include arith.c in scan for symbols.
+
+	* lib.c (init): arith_init() must now be called after eval_init().
+
+	* txr.1: Documented new variables..
+
+	* txr.vim: Updated.
+
+2014-08-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 97.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+	* dep.mk: Regenerated.
+
+2014-08-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_quasi): Regression: fix broken handling
+	of @{var mod} syntax triggering a bogus assertion. Mods are the third
+	element in the abstract syntax now, not fourth. There is no next link.
+	Removing bogus comment referring to a nonexistent function.
+
+2014-08-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): Fix regression introduced in 94: broken @(load).
+
+2014-08-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (top): Renamed to gc_prot_top, turned extern.
+	(prot1, rel1, mark): Follow rename.
+
+	* gc.h (gc_prot_top): Declared.
+
+	* signal.h (extended_jmp_buf): New member, gc_pt.
+	(extended_setjmp): Save and restore gc_prot_top.
+
+2014-08-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	GC correctness fixes: make sure we pin down objects for which we borrow
+	low level C pointers, while we execute code that can cons memory.
+
+	* lib.c (list_str): Protect the str argument.
+	(int_str): Likewise.
+
+	* regex.c (search_regex): protect the haystack string,
+	while using the h pointer to its data, since regex_run
+	can use the derivative-based engine which conses.
+
+	* stream.c (vformat_str): Protect str argument, since
+	put_char might conceivably cons.
+	(vformat): Protect fmtstr.
+
+2014-08-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 96.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+	* txr.vim: Regenerated.
+
+2014-08-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Uprooting stupidities in handling of output variables.
+
+	* parser.y (o_elems_transform): Remove useless function which
+	was only unwrapping the strange parse of output vars.
+	(o_elems_opt, rep_elem, quasilit, wordsqlit): Eliminate
+	o_elems_transform call.
+	(o_var, q_var): Eliminate the phrase structure rules which
+	match an extra o_elem or quasi_item, and which incorporate
+	them into the var syntax tree element. Place the modifiers
+	into the third position, not fourth.
+
+	* eval.c (subst_vars): Eliminate handling of "pat"
+	element. Actually that was not even there thanks to
+	o_elems_transform being applied: dead code. Pull modifiers
+	from the third element of the var form now, not fourth.
+
+	* match.c (subst_vars): Similar changes as in the match.c
+	subst_vars function. Here the pat variable is even more obviously
+	useless; if it is not nil, it is just punted back to the spec.
+
+2014-08-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix regression in previous change: we must match a compound text
+	element whole, and not break it up.
+
+	* match.c (search_match): Take a spec argument.
+	(h_var): Turn a text element into a one-element spec and process
+	with search_match.
+
+	* txr.1: Updated text about matching of variables
+	followed by a directive or function, and about consecutive
+	variables via directive.
+
+2014-08-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	When a variable is delimited by some form other than
+	the contents of a variable, fixed string or regex, we now
+	use the entire tail of the specline to find the match.
+	So for instance @var@(trailer)foo works as intuition
+	might expect.
+
+	* match.c (search_form): Static function removed.
+	(search_match): New static function based on search_form.
+	Does not handle regexes, and does not update c->bindings.
+	(h_var): Renamed local variable pat to next. Added a few
+	missing rlcp's. Combined the cases when pat is a cons to
+	one block so consp isn't repeatedly tested. Function now
+	handles a var followed by (sys:text ...) elements specially;
+	the first element of the text block is pulled out and
+	matched. Implemented "var delimiting spec" general case
+	which matches the entire tail of the spec at successive
+	character positions until a match is found, and the skipped
+	text goes into the variable.
+
+2014-08-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	First cut at restructuring how variable matching works in the pattern
+	language. The goal is to remove the strict behavior of using only one
+	element of context after a variable.
+	variable form at parse time: we unravel that first.
+
+	* parser.y (grammar): Simplifying the phrase structure
+	rule for the var element. All the variants that have
+	a trailing elem are removed. The abstract syntax
+	changes; the modifier moves to the third position in the
+	list.
+
+	* match.c (h_var): Matching change: the element which follows
+	a variable is now pulled from the specline rather than the variable
+	syntax, which is how it should have been done in the first place. The
+	modifiers are pulled from a different spot in the variable syntax.
+
+2014-08-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c (filter_init): Expose the trie-lookup-begin,
+	trie-value-at and trie-lookup-feed-char functions as intrinsics.
+
+	* txr.1: Document exposed functions.
+
+2014-08-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: ret operator does not generate functions
+	that take any number of arguments.
+
+	* eval.c (me_ret): Generate (op identity (progn @rest <expr>))
+	rather than of (op identity <expr>).
+
+	* txr.1: Update misleading equivalence.
+
+2014-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 95.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+2014-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	No getppid on MinGW.
+
+	* configure: Add test for getppid.
+
+	* eval.c (getppid_wrap, eval_init): use HAVE_GETPPID
+
+2014-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (yyerr): Function removed; it is not used in the lexer,
+	and converted to a macro in the parser.
+
+	* parser.y (define_transform): take a parser argument rather
+	than scanner. Set up scnr local variable for yyerr macro.
+	Remove scnr argument from macro calls.
+	(yyerr): New macro.
+	(grammar): Remove scnr argument from yyerr calls.
+
+2014-08-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Reentrant parser regression
+
+	* parser.y (yybadtok): New macro.
+	(yybadtoken): Function must take parser argument.
+	(grammar): Replace uses of yybadtoken with yybadtok.
+
+	* parser.h (yybadtoken): Declaration updated.
+
+	* parser.l (grammar): Fix incorrect yyprepf calls
+	that are missing the yyscanner parameter.
+
+2014-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 94.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+	* txr.vim, dep.mk: Updated.
+
+2014-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (make_random_state): Make the seeding behavior
+	portable when the seed is a fixnum or bignum. The goal is that the same
+	values of seed should produce the same random sequences on any
+	platform.
+
+2014-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Fix incorrect registration of
+	random-fixnum, which doesn't allow it to be called
+	with no arguments.
+
+2014-08-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Back port from Berkeley Yacc to GNU Bison.
+	We need a prototype of yylex that is in scope of the grammar,
+	but YYSTYPE is not defined there.
+
+	* parser.l: Bison 3 declares yyparse in y.tab.h, so we have to
+	reorder some #includes.
+
+2014-08-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Big switch to reentrant lexing and parsing.
+
+	* parser.l (YY_INPUT): Stop relying on removed yyin_stream;
+	refer to stream via yyextra.
+	(yyin_stream, lineno, errors, spec_file_str,
+	prepared_error_message): Global variables removed.
+	(yyget_column, yyset_column): Missing prototypes not generated by flex
+	in bison bridge mode have to be added by us to avoid
+	warning.
+	(yyerror): Takes parser and scanner as parameters.  Prepared error
+	message is now in the parser context.  Calls to other error handling
+	functions receive scanner context.
+	(yyerr): New function.
+	(yyerrorf, yyerrprepf): Takes scanner argument, chases extra data to
+	get to parser, and refers to parser variables instead of globals.
+	(num_esc): Scanner argument added.
+	(%option reentrant, %option bison-bridge, %option extra-type): New
+	flex options.
+	(grammar): yyscanner added everywhere.
+	(end_of_char): Takes scanner argument.
+	(parse_init): Removed references to yyin_stream and
+	prepared_error_message.
+	(parse_reset): Function renamed to open_txr_file. Returns
+	results via pointers instead of setting global variables.
+	(regex_parse, lisp_parse): Use reentrant parser interface.
+
+	* parser.y (yyerror): Prototype removed.
+	(yylex): Prototype moved after grammar, with new arguments.
+	(sym_helper, define_transform): Take scanner argument.
+	(make_expr): Takes parser argument.
+	(rlrec): New static function.
+	(rl): Function turned into macro.
+	(mkexp, symhlpr): New macros.
+	(%purse-parser, %parse-param, %lex-param): New Yacc options.
+	(grammar): Actions re-worked for reentrance. Parser and scanner
+	contexts are passed down to helper functions, in some cases
+	via the three new macros. The result of the parse is stored
+	in the syntax_tree member of the parser_t structure instead
+	of a global. The yylex function receives the scanner instance.
+	(get_spec): Function removed.
+	(parse): New function.
+
+	* parser.h (lineno, errors, yyin_stream, spec_file_str):
+	Declarations removed.
+	(parser_t): New struct.
+	(yyerr): New function declared.
+	(yyparse, yyerror, yyerrorf, end_of_regex, end_of_char,
+	yylex, yylex_destroy): Declarations updated.
+	(yylex_init, yyget_extra, yyset_extra): Declared.
+	(parse_reset, rl): Declaration removed.
+	(open_txr_file): Declaration added.
+	(parse): New function.
+
+	* match.c (v_load): Use new reentrant parser interface.
+
+	* txr.c (txr_main): Stop using parser-related global variables;
+	call parser using new reentrant interface.
+
+2014-08-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.c (interrupt_count): New global variable.
+	(sig_handler): Increment and decrement interrupt count.
+	If the interrupt count is already positive, treat
+	that as if async signals were not enabled: do not
+	invoke handlers.
+
+2014-08-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (have_sys_time): New variable.
+	Added check for setitimer/getitimer which also
+	checks for <sys/time.h>.
+
+	* signal.c (sig_init): Register itimer-real, itimer-virtual,
+	itimer-prof variables and getitimer and setitimer functions.
+	(tv_to_usec): New static function.
+	(getitimer_wrap, setitimer_wrap): New functions.
+
+	* signal.h (getitimer_wrap, setitimer_wrap): Declared.
+
+	* txr.1: Documented itimers.
+
+2014-08-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.c (set_sig_handler): Don't use SA_ONSTACK
+	except for signals for which we use alt stack.
+
+	* signal.h (sig_save_enable): Do sig_check before
+	enabling async signals. This caused the !async_sig_enabled assertion
+	to trip inside make_obj.
+
+2014-08-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.c (sig_hup, sig_int, sig_quit, sig_ill, sig_trap, sig_abrt,
+	sig_bus, sig_fpe, sig_kill, sig_usr1, sig_segv, sig_usr2, sig_pipe,
+	sig_alrm, sig_term, sig_chld, sig_cont, sig_stop, sig_tstp, sig_ttin,
+	sig_ttou, sig_urg, sig_xcpu, sig_xfsz, sigtalrm, sig_prof, sig_poll,
+	sig_sys, sig_winch, sig_iot, sig_stkflt, sig_io, sig_lost, sig_pwr):
+	Remove unused global variables variables.
+
+	* signal.h: Remove declarations thereof.
+
+2014-07-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (getpid_wrap, getppid_wrap): New static functions.
+	(eval_init): Registered getpid and getppid intrinsics.
+
+	* signal.c (kill_wrap): New static function.
+	(sig-init): Registered kill intrinsic function.
+
+	* txr.1: Documented getpid, gettpid and kill.
+
+2014-07-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Allow unquotes and splices in QSPECIAL and BRACED states.
+
+	* parser.y (quasi_item): Support splices as items.
+
+	* genvim.txr: Syntax highlighting support for unquotes in
+	quasiliterals.
+
+	* txr.vim: Updated.
+
+2014-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register uniq function.
+
+	* lib.c (uniq): New function.
+
+	* lib.h (uniq): Declared.
+
+	* txr.1: Documented uniq.
+
+2014-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (repeatv): Renamed to repeat. Turned into function
+	with one optional argument, reflecting existing behavior.
+	(eval_init): Registration of repeat updated.
+
+	* txr.1: Fixed incorrect documentation which falsely suggests
+	that repeat takes multiple lists, and doesn't mention
+	the optional count.
+
+2014-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus, minus, mul): Fix missing breaks
+	to switch statements, leading to strange error
+	messages when wrong types are passed in.
+
+2014-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register nconc as intrinsic.
+
+	* lib.c (nconcv): New function.
+
+	* lib.h (nconcv): Declared.
+
+	* txr.1: Documented nconc.
+
+2014-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (reduce_left, reduce_right): Nullify incoming sequence
+	argument so empty vectors and strings can be processed.
+
+2014-07-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (giterate_func, giterate): Adjusting semantics of giterate to
+	include seed item in the sequence. The while test is applied to
+	each item before it is passed through the function. Also,
+	eliminated useless rplacd operation.
+
+	* txr.1: Updated documentation of giterate.
+
+2014-07-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register partition-by intrinsic.
+
+	* lib.c (partition_by_func): New static function.
+	(partition_by): New function.
+
+	* lib.h (partition_by): Declared.
+
+	* txr.1: Documented partition-by.
+
+2014-07-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (rising_product): Fix wrong m == n case,
+	which breaks the n_perm_k function for k == 1.
+
+	* txr.1: Fix typo: n-choose-k written in place of n-perm-k.
+
+2014-07-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix 2014-02-05 safety regression: unchecked use of non-function objects
+	in some contexts that require functions.
+
+	* lib.c (funcall, funcall1, funcall2, funcall3, funcall4):
+	check type(fun) before dereferencing to see whether there
+	are optional args.
+
+2014-07-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (giterate_func, giterate): New static functions.
+	(eval_init): Registered giterate as intrinsic.
+
+	* txr.1: Documented giterate.
+
+2014-07-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* unwind.h (uw_block_begin): Get rid of the unused typedef trick,
+	replace with do { } while (0), since we don't have any instances of a
+	uw_block_begin followed by declarations.
+	(uw_catch_begin): Move SYMVAR and EXCVAR inside the do/while block,
+	so that the expansion doesn't begin with a declaration.
+
+2014-07-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile, arith.c, arith.h, combi.c, combi.h, configure, debug.c,
+	debug.h, eval.c, eval.h, filter.c, filter.h, gc.c, gc.h, hash.c,
+	hash.h, lib.c, lib.h, match.c, match.h, parser.h, parser.l, parser.y,
+	rand.c, rand.h, regex.c, regex.h, signal.c, signal.h, stream.c,
+	stream.h, syslog.c, syslog.h, txr.c, txr.h, unwind.c, unwind.h,
+	utf8.c, utf8.h: Synchronize license header with LICENSE.
+
+2014-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (subst_vars): Bugfix: I neglected to apply the
+	filter which is in effect to the result of interpolating a TXR Lisp
+	expression, oops!
+
+2014-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (METANUM): Forgotten %right declaration for this
+	token has been resulting in a shift-reduce conflict.
+
+2014-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Add a check, in the case that we cannot make an
+	executable, whether this is due to being required to use C99.
+	For instance, the Solaris environment requires compilation
+	using the C99 dialect if _XOPEN_SOURCE is set to 600 or higher.
+
+	* debug.c: When compiling as C99, we have to obey the special
+	C99 conventions for instantiating inline functions.
+
+	* hash.c: Likewise.
+
+	* lib.c: Likewise.
+
+	* parser.y: Likewise.
+
+	* unwind.c: Likewise.
+
+2014-07-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+	* arith.c (log2): Change to static.
+
+2014-07-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (me_case): Fix quoting issue in expansion.
+
+2014-07-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.c (set_sig_handler): Set up and tear down alternate
+	stack for SIGBUS also, not only for SIGSEGV. On Linux,
+	when stack growth collides with another memory mapping,
+	it triggers a SIGBUS not SIGSEGV, which occurs when the
+	process limit on stack size is exceeded. In either
+	situation, we need an alternative stack.
+
+2014-07-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (caseq_s, caseql_s, casequal_s, memq_s, memql_s, memqual_s,
+	eq_s, eql_s, equal_s): New symbol variables.
+	(me_case): New static function.
+	(eval_init): Initialize new variables. Register caseq, caseql and
+	casequal macros.
+	Re-register memq, memql, memqual, eq, eql and equal using
+	new symbol variables.
+
+	* txr.1: Document case, caseql and casequal.
+
+2014-07-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register juxt as intrinsic.
+
+	* lib.c (do_juxt): New static function.
+	(juxtv): New function.
+
+	* lib.h (juxtv): Declared.
+
+	* txr.1: Documented juxt.
+
+2014-07-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (divi): Support one-argument form.
+	Use "/" name in error reporting, not "divi".
+
+	* eval.c (eval_init): Change registration of / so only
+	one argument is required out of two.
+
+	* txr.1: Document one-argument division.
+
+2014-07-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Fixed highlighting issues in numbers followed by newline.
+
+	* txr.vim: Regenerated.
+
+2014-07-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (search_str): Support negative starting index.
+	Hoist uselessly repeated c_str operation out of loop.
+
+	* txr.1: Document negative starting index for search-str.
+
+2014-07-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_construct): Nullify the pairs argument so that
+	it works correctly with an empty vector.
+
+	* txr.1: Write missing documentation for hash-construct.
+
+2014-07-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (mapdov): New function.
+	(eval_init): Register mapdo intrinsic.
+
+	* lib.c (mapdo): New function.
+
+	* lib.h (mapdo): Declared.
+
+	* txr.1: Documented mapdo.  Documented zero-argument case
+	for mapcar, mapcar*, mappend and mappend*.
+
+2014-07-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (put_strings, put_lines): New functions.
+	(stream_init): Registered new functions as intrinsics.
+
+	* stream.h (put_strings, put_lines): Declared.
+
+	* txr.1: Documented.
+
+2014-07-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register get-lines as a synonym for lazy-stream-cons.
+
+	* stream.c (get_string): New function.
+
+	* stream.h (get_string): Declared.
+	(stream_init): get_string registered as get-string intrinsic.
+
+	* txr.1: Documented get-string, and get-lines as a synonym for
+	lazy-stream-cons.  Documented the behavioral difference of
+	lazy-stream-cons lazy lists for real-time and non-real-time streams.
+
+2014-07-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (conftest, conftest2): Link math
+	library so we can test for math functions.
+
+	* arith.c (log2_init): New static function.
+	(log2, logtwo): New functions.
+	(l2): New static variable.
+	(arith_init): Call log2_init.
+
+	* configure (lang_flags): Switching _XOPEN_SOURCE
+	from 500 to 600 to reveal log2.
+	Adding test for log2.
+
+	* eval.c (eval_init): Register log2 intrinsic.
+
+	* lib.h (logtwo): Declared.
+
+	* txr.1: Documented log2.
+
+2014-07-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_do, v_require): Set up and tear down environment frame,
+	like other situations that evaluate TXR Lisp from the pattern language.
+	Otherwise obscure things will go wrong.
+	(h_do): Same as above, and additionally, add the forgotten
+	call to install the bindings into the match context.
+
+2014-07-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_eol): Fix broken horizontal @(eol).
+	It should be returning next_spec_k, rather
+	than bindings, which indicate a complete match.
+
+2014-07-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/001/query-1.txr: Remove bogus public domain header.
+
+	* tests/001/query-2.txr: Likewise.
+
+	* tests/001/query-3.txr: Likewise.
+
+	* tests/001/query-4.txr: Likewise.
+
+	* tests/002/query-1.txr: Likewise.
+
+2014-07-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix old, known syntax highlighting problems between symbols,
+	integers and floating literals.
+
+	* genvin.txr (txr_num): The general solution is to over-match
+	a number by one character: a non-token constituent, and then
+	subtract that from the highlight region using me=e-1.
+	This solves the prefix ambiguities between numbers and symbols.
+	(txr_badnum): New match: matches floating literals with trailing
+	junk, which are highlighted as errors.
+	(txr_directive, txr_list, txr_bracket, txr_mlist, txr_mbracket):
+	All of these contain a txr_badnum.
+
+	* txr.vim: Regenerated.
+
+2014-07-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix broken regex highlighting.
+
+	* genvim.txr (txl_regex): Missing syntactic region added.
+	(txr_regex): Start pattern is just a slash; no optional # in front.
+
+	* txr.vim: Regenerated.
+
+2014-07-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): Allow Lisp code executed via -e and -p options to
+	see the bindings set up by prior -D options.
+
+2014-07-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register interpose and lconsp as intrinsics.
+
+	* lib.c (lconsp, interpose): New functions.
+	(lazy_interpose_func, lazy_interpose): New static functions.
+
+	* lib.h (lconsp, interpose): Declared.
+
+	* txr.1: Documented lconsp and interpose.
+
+2014-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 92.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* share/txr/stdlib/ver.txr: Likewise
+
+2014-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/011/macros-2.txr: Added test for labels shadowing macro,
+	and let shadowing symacro.
+
+	* tests/011/macros-2.expected: Regenerated
+
+	* txr.vim: Regenerated.
+
+2014-07-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing local function binding constructs.
+
+	* eval.c (fbind_s, lbind_s, flet_s, labels_s): New symbol globals.
+	(env_fb_to_fb): New static function.
+	(lookup_mac): Implement the same shadow check for function macros
+	that is done for symbol macros, because we now have local functions
+	that can shadow local macros.
+	(fbindings_helper, op_fbind, make_fun_shadowing_env,
+	expand_fbind_vars, me_flet_labels): New static functions.
+	(expand): Add cases for fbind and lbind.
+	(eval_init): Intern the four new symbols.
+	Register sys:fbind and sys:lbind operators.
+	Register flet and labels macros.
+
+	* txr.1: Documented flet and labels.
+
+2014-07-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bindings_helper): New parameter to indicate that
+	the caller needs the return value, so the function
+	can avoid consing up a list that will be thrown away.
+	(op_let): Pass nil argument to new parameter of bindings_helper.
+	(op_each, op_for): Pass t to indicate that the return value
+	is needed.
+
+2014-07-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* LICENSE: Adding copyright for MPI Library.
+
+	* METALICENSE: Adding notes about MPI.
+
+2014-07-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: install the LICENSE and METALICENSE files into the data
+	directory.
+
+	* txr.c (help): Help text updated to document --license option.
+	(license): New function.
+	(txr_main): Implement --license option.
+
+	* unwind.h (uw_catch): Add cast to suppress warning about unused symbol.
+
+	* txr.1: Document --license option.
+
+2014-07-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (replace_list, sel): fix use of unused variable.
+
+2014-07-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* LICENSE: Small wording change. Add pointer to METALICENSE.
+
+	* METALICENSE: New file.
+
+2014-07-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* LICENSE: Switching to simplified two-clause BSD license,
+	but with modifications. Adding back the no-liability
+	part of the disclaimer, but with abbreviated text.
+	Also, rewriting the initial paragraph to make it clear
+	that the two conditions cover redistribution, and that
+	use of the software is tantamount to agreeing with the
+	disclaimer.
+
+2014-07-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Spell check.
+
+2014-07-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Corrections from Roman Mishin
+
+2014-07-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (apf_s, ipf_s): New symbol variables.
+	(me_ap, me_ip): Generate a much simpler macro-expansion:
+	a call to apf or ipf, rather than lambda syntax.
+	(me_ado, me_ido): New static functions.
+	(eval_init): Initialize apf_s and ipf_s variables.
+	Use them in the registration calls for apf and ipf.
+	Register ado and ido macros.
+
+	* txr.1: Streamlined documentation for ap and ip,
+	and added ado and ido.
+
+2014-07-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (apf, ipf): Bugfix: do_apf and do_ipf
+	should be registered as variadic functions.
+
+2014-07-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 91.
+
+	* RELNOTES: Updated.
+
+	* configure, txr.1: Bumped version.
+
+	* dep.mk, txr.vim: Regenerated.
+
+2014-07-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: use $(EXE) in install: recipe.
+
+	* configure: set up EXE variable in config.make, not exe.
+
+2014-07-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented usleep.
+
+2014-07-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc): Support indexing using a list of positions,
+	such as obtained by the where function.
+
+	* lib.c (replace_list, replace_str, replace_vec): Allow the
+	from argument to be a list of index positions, possibly empty.
+
+	* txr.1: Condensed syntactic descriptions under dwim operator.
+	Range Indexing section no longer says that the value nil
+	can be used as either endpoint of a range. This will not
+	work any longer since a "from" value of nil looks like an
+	empty list of indexes. Documented new behavior under
+	replace, and shortened documentation for replace-list,
+	replace-str and replace-vec.
+
+2014-06-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (sel): Bugfix: not implemented correctly for sequences
+	which are lists.
+
+2014-06-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (bit): New function.
+
+	* eval.c (eval_init): Register bit as intrinsic.
+
+	* lib.h (bit): Declared.
+
+	* mpi-patches/add-bitops (mp_bit): New function.
+
+	* txr.1: Documented bit
+
+2014-06-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/add-bitops (mp_and, mp_or, mp_xor, mp_shift): Plug memory
+	leaks caused by wrongly initializing the temporary destination operand
+	for mp2_comp with a size, which mp2_comp then clobbers by doing the same
+	thing.  Also plug memory leaks that happen in in out-of-memory return
+	case.
+
+2014-06-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (where, sel): Extend into hashes.
+
+	* txr.1: document hash support for select and where.
+
+2014-06-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: apply_intrinsic and iapply must not destructively
+	manipulate argument lists.
+
+	* eval.c (apply_frob_args): Rewrite to non-destructive
+	one-pass version.
+	(iapply): Likewise.
+
+	* lib.c (term): New function.
+
+	* lib.h (term): Declared.
+
+2014-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixes to bignum bit operations affecting pretty much all bit operations
+	when bit field operands are negative, affecting logand, logor, logxor,
+	lognot, logtrunc, logtest and ash. In addition, logtest was found to
+	return the logical inverse of its correct value.
+
+	* arith.c (logtest): Fix broken boolean polarity
+	of return value.
+
+	* mpi-patches/add-bitops (mp_2comp): Fix incorrect
+	treatment of negative values.
+	(mp_and): Fix incorrectly ordered statements, which
+	cause failure when operands are negative.
+
+2014-06-26  kaz kylheku  <kaz@kylheku.com>
+
+	* eval.c (iapply_s): new global variable.
+	(iapply, me_ip): new static functions.
+	(do_apf): Bugfix: use apply_intrinsic, not apply.
+	(do_ipf, ipf): New static functions.
+	(eval_init): initialize iapply_s. register me_ip macro
+	expander, and the iapply and ipf functions.
+
+	* txr.1: Documented iapply, ipf and ip.
+
+2014-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (last): Bugfix: reversed null test.
+
+2014-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): register range_regex and tok_where
+	as intrinsics.
+
+	* lib.c (tok_where): New function.
+
+	* lib.h (tok_where): Declared.
+
+	* regex.c (range_regex): New function.
+
+	* regex.h (range_regex): Declared.
+
+	* txr.1: Documented tok-where and range-regex.
+
+2014-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (search): Bugfix in type mismatch error message:
+	trying to print cons function pointer as value.
+
+2014-06-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (mapcarv): Use mapcar_listout, so list_of_lists can be
+	a non-list sequence.
+	(eval_init): Register transpose and zip as intrinsics.
+
+	* lib.c (curry_12_1_v): New static function.
+	(transpose, mapcar_listout): New functions.
+	(mapcar): Redefined in terms of mapcar_listout.
+
+	* lib.h (transpose, mapcar_listout): Declared.
+
+	* txr.1: Documented transpose and zip.
+
+2014-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: macros not being expanded in expansions embedded in
+	quasilierals: i.e. the forms X and Y in `@{X}`
+	and `@{X Y}`, where X and Y can be Lisp symbol macros or compound
+	forms that is a macro call.
+
+	* eval.c (expand_quasi): Handle the var forms in a quasi.
+
+	* parser.y (n_exprs_opt, q_var): New grammar nonterminals.
+	q_var is a clone of o_var, but with different construction behavior.
+	It fixes the bug that o_var applies expand_meta to embedded
+	Lisp forms, which is not appropriate for TXR Lisp quasiliterals.
+	(quasi_item): Derive q_var rather than o_var.
+
+2014-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Optimization: add missing tail updates to some list
+	collecting loops.
+
+	* lib.c (tuples_func, where, sel): Catch return value of
+	list_collect and update tail variable.
+
+	* match.c (do_txeval): Likewise.
+
+	* parser.y (expand_meta): Likewise for list_collect_nconc.
+
+2014-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (do_apf, apf): New functions.
+	(eval_init): Register apf as intrinsic.
+
+	* txr.1: Document apf.
+
+2014-06-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improve error reporting.
+
+	* eval.c (eval_error): Use last_form_evaled if form is null.
+	(apply): Substitute apply symbol if ctx_form is null.
+	(apply_intrinsic): Do not pass fake (apply) context form to
+	apply, just pass nil.
+
+2014-06-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (identity_s): New global variable.
+	(me_ret, tf, nilf, do_retf, retf): New static functions.
+	(eval_init): Initialize identity_s, and use it for registration
+	of identity. Register ret macro, and the retf, tf and nilf
+	functions.
+
+	* txr.1: Documentation for ret, retf, tf and nilf.
+
+2014-06-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: dwim operator contradicts the documentation
+	and intended design.
+
+	* eval.c (do_eval): When calling do_eval_args to evaluate
+	the arguments of a compound form that is a function call,
+	do not pass down the lookup function, but substitute &lookup_var.
+	Passing down the lookup function means tha all evaluation
+	enclosed in (dwim ...) or [...] follows the Lisp-1 style.
+
+2014-06-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (me_ap): New static function.
+	(eval_init): Use new list_f instead of func_n0v(identity).
+	Register multi as intrinsic.  Register me_ap as ap macro.
+
+	* lib.c (list_f): New global variable.
+	(multi): New function.
+	(multi_sort): Use list_f in place of func_n0v(identity).
+	(obj_init): gc-protect and initialize list_f.
+
+	* lib.h (list_f, multi): Declared.
+
+	* txr.1: Documented multi and ap.
+
+2014-06-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register member and member_if as intrinsics.
+
+	* lib.c (member, member_if): New functions.
+
+	* lib.h (member, member_if): Declared.
+
+	* txr.1: Documented.
+
+	* txr.vim: Regenerated.
+
+2014-06-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (generic_funcall): Bugfixes: support symbols.
+	Removed dubious statement which clamps nargs to the number
+	of fixed parameters, breaking variadic calls.
+	Test case: (mapcar 'list '(1 2)) -> ((1) (2))
+	Note: generic_funcall is only used when non-function objects
+	are used as functions; variadic funcalls were not broken.
+
+2014-06-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (generic_funcall): Bugfixes: support symbols.
+	Removed dubious statement which clamps nargs to the number
+	of fixed parameters, breaking variadic calls.
+	Test case: (mapcar 'list '(1 2)) -> ((1) (2))
+
+2014-06-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Fix broken examples for some and none functions.
+
+2014-06-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (not_null): New static function.
+	(eval_init): Use null_f in existing registration of null
+	and not. Add registration for not_null as "true",
+	and for null_f as "false".
+
+	* txr.1: Documented true and false.
+
+2014-06-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): register tuples as intrinsic.
+
+	* lib.c (tuples_func): New static function.
+	(tuples): New function.
+
+	* lib.h (tuples): Declared.
+
+	* txr.1: Documented.
+
+2014-06-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_print): Render character DC00 as "pnul".
+	Clean up code which chooses rendering for characters.
+	Print C0 and C1 control characters, as well as D800-DFFF,
+	FFFE and FFFF and characters above FFFF using hex;
+	others are printed using the #\<char> notation.
+
+	* parser.y (char_from_name): map "pnul" to DC00.
+
+	* txr.1: Documented pnul, clarified character
+	printing rules, and added a cautionary note about
+	possible ambiguity in printing.
+
+2014-06-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register pos_max, pos_min, find_max,
+	find_min and seqp as intrinsics.
+
+	* lib.c (gt_f, lt_f): New variables.
+	(to_seq): renamed to toseq.
+	(seqp): New function.
+	(minmax): New static function.
+	(replace_str, replace_vec): Follow to_seq renaming.
+	(find_max, find_min, pos_max, pos_min): New functions.
+	(obj_init): gc-protect and initialize gt_f and lt_f.
+
+
+	* lib.h (gt_f, lt_f): Declared.
+	(to_seq): Declaration updated to toseq.
+	(seqp, find_max, find_min, pos_max, pos_min): Declared.
+
+	* txr.1: Updated.
+
+2014-06-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): where and sel registered as intrinsics
+	where and select.
+
+	* lib.c (generic_funcall): Support a sequence as an argument
+	to a sequence.
+	(where, sel): New functions.
+
+	* lib.h (where, sel): Declared.
+
+	* txr.1: Documented.
+
+2014-06-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: range and range* broken when "to" argument is
+	omitted. This was broken in version 89, by the
+	2014-04-08 commit.
+
+	* eval.c (rangev_func, range_star_v_func): Only perform
+	numeric tests between from and to if to is not nil.
+
+2014-06-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: Install share/txr/stdlib/*.txr material.
+
+	* match.c (do_txeval): If a variable is not in the bindings, fall
+	back on treating it as a TXR Lisp dynamic variable. This allows
+	us to refer to the stdlib variable from a quasistring in a
+	@(load ...) directive.
+
+	* txr.c (sysroot_init): Register new variable, *txr-version*.
+
+	* share/txr/stdlib/ver.txr: New file.
+
+2014-06-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): use the abs_path_p function instead of
+	checking for leading slash.
+
+	* stream.c (abs_path_p): New function.
+	(stream_init): Register abs_path_p as abs-path-p.
+
+	* stream.h (abs_path_p): Declared.
+
+	* txr.1: Documented abs-path-p.
+
+	* dep.mk: Updated.
+
+2014-06-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 90
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped.
+
+	* txr.spec: Bumped version.
+
+	* txr.vim, dep.mk: Regenerated.
+
+	* RELNOTES: Updated
+
+2014-06-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (txr.o): Pass TXR_VER preprocessor symbol on gcc command
+	line.
+	(PREINSTALL): New variable holding a step for the install recipe.
+	(pax tar zip): New targets.
+
+	* configure (txr_ver): Version now added to config.make, passed
+	through to txr.c.
+	(gen_config_make): bindir, datadir and mandir are established
+	using gmake's regular macro assignment (=) rather than
+	expanding assignment (:=). This allows us to override the
+	prefix variable after configure time.
+
+	* lib.h (wli_noex): New macro.
+	(wli): Retarget to wli_noex, so that argument is subject
+	to macro replacement.
+
+	* txr.c (version): Use TXR_VER defined on compiler command line,
+	rather than hard-coded string literal.
+
+2014-06-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Change registration of string_cmp
+	to cmp_str. Add registrations for str_eq, str_lt,
+	str_gt, str_le, and str_lt.
+
+	* lib.c (string_cmp): Name changes to cmp_str, and the
+	function fixed so that it actually works.
+	The name change doesn't affect anyone because the function
+	was too broken to use due to the incorrect type dispatch.
+	(string_lt): Name changes to str_lt.
+	(str_eq, str_gt, str_le, str_ge): New functions.
+
+	* lib.h (string_cmp, string_lt): Declarations renamed.
+	(str_eq, str_gt, str_le, str_ge): New declarations.
+
+	* txr.1: Document string-cmp to cmp-str rename, that
+	string-lt is deprecated, and the new str<, str>,
+	str>=, str<= and str= functions.
+
+2014-06-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (PROG): Removing ./ prefix from variable name; adding it
+	to invocations of $(PROG) in some rules.
+	(txr.o): Pass several strings as macros on the command line:
+	TXR_REL_PATH, EXE_SUFF and PROG_NAME.
+
+	* configure (bindir, datadir, mandir): These variables become
+	just relative paths from the prefix.
+
+	* txr.c (sysroot): Use the TXR_REL_PATH, EXE_SUFF and PROG_NAME
+	preprocessor symbols defined on the command line to avoid
+	hard-coding strings like "bin/txr" and "bin/txr.exe" which
+	actually should reflect the value of the bindir variable.
+
+2014-06-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (get_self_path): Fix spelling of GetModuleFileName.
+	Add missing parentheses in expression.
+	(sysroot_init): On Windows, filter progpath to change
+	backslashes to forward slashes.
+
+2014-06-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (yylex_destroy): The FLEX_ version are prefixed with YY_
+	in old flexes too.
+
+2014-06-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	New variable stdlib, with a sysroot mechanism to compute
+	the path based on the "sysroot" where it is actually installed.
+
+	* txr.c (progname_8u, progpath): New static variables.
+	(get_self_path, sysroot_helper, sysroot, sysroot_init): New
+	static functions. Sysroot creates a stdlib variable.
+	(main): Initialize progname_u8 value, and call sysroot_init.
+
+2014-06-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (match_str): Extended to suffix testing, with a negative
+	start argument.
+
+	* txr.1: Documented.
+
+2014-06-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: fix broken tests; numerous test cases output
+	bindings, and need the -B option. One test case does not
+	need the -l option which now implies -B.
+
+2014-06-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): New option --args.
+	Also, put in missing check for -f being erroneously clumped.
+
+	* txr.1: Documented.
+
+2014-06-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	The dumping of bindings and printing of false must now
+	be explicitly requested by the -B option.
+
+	* match.c (opt_nobindings): Variable removed.
+	(opt_print_bindings): New variable.
+	(extract): Print bindings or "false" if opt_print_bindings is true.
+
+	* stream.c (output_produced): Variable removed.
+	(stdio_put_string, stdio_put_char, stdio_put_byte): Remove
+	update of output_produced.
+
+	* stream.h (output_produced): Declaration removed.
+
+	* txr.1: Documentation updated.
+
+	* txr.c (txr_main): Option 'b' does nothing. 'B', 'l', 'a',
+	and '--lisp-bindings' set opt_print_bindings to 1.
+
+	* txr.h (opt_nobindings): Declaration removed.
+	(opt_print_bindings): Declared.
+
+	* unwind.c (uw_throw): When exiting due to a query error or
+	file error, print false when opt_print_bindings is true.
+
+2014-06-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing issue with list-like iteration over generic sequences,
+	namely that empty strings and vectors are not nil.
+	The nullify function is introduced. It is also exposed to
+	users, as is the existing make_like function.
+
+	* eval.c (mapcarv, mappendv, lazy_mapcar, lazy_mapcarv):
+	Use nullify to handle non-list inputs correctly.
+	(eval_init): Registering make_like and nullify as intrinsics.
+
+	* lib.c (copy_list, to_seq, list_collect_nconc, list_collect_append,
+	reverse, lazy_appendv_func, lazy_appendv, ldiff, memq, memql,
+	memqual, remq, remql, remqual, remove_if, keep_if, rem_lazy_rec,
+	remq_lazy, remql_lazy, remqual_lazy, remove_if_lazy, keep_if_lazy,
+	countqual, countql, countq, count_if, some_satisfy, all_satisfy,
+	none_satisfy, do_chain, chainv, do_and, andv, do_or, orv,
+	cat_vec, assoc, assql, mapcar, mapcon, mappend, sort, multi_sort,
+	find, find_if, posqual, posql, posq, pos, pos_if, set_diff,
+	search): Use nullify for correctness. Some functions fixed
+	so return sequence matches type of input sequence.
+	(nullify): New function.
+
+	* lib.h (nullify): Declared.
+
+	* txr.1: Documented nullify and ake-like.
+
+2014-06-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register new search function as intrinsic.
+
+	* lib.c (search_list): New static function.
+	(search): New function.
+
+	* lib.h (search): New function declared.
+
+	* txr.1: Documented.
+
+	* txr.vim: Regenerated.
+
+2014-06-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Adding an explicit lexical rule to
+	catch backslashes occurring within a regex, not followed by a
+	character. This can happen in dynamically parsed regexes
+	such as "abc\\".
+
+2014-06-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (yylex_destroy): Only rely on the FLEX_ version
+	numbers if they are defined. In a newer flex, they are prefixed
+	by YY_.
+
+2014-06-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (lang_flags): Removing -D_BSD_SOURCE
+	from lang_flags. Adding a test for determining
+	which flag reveals BSD functions. This is due to the
+	braindamaged way feature selection macros work on
+	FreeBSD. There is no way to say "give me only the
+	functions from a certain version of the Unix spec,
+	plus traditional BSD functions", so we have to resort to
+	using the internal symbol __BSD_VISIBLE. Also, changing
+	the detection test for daemon function to the
+	pointer-based approach.
+
+2014-06-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (lang_flags): drop -D_POSIX_C_SOURCE=199309L.
+	This is subsumed by -D_XOPEN_SOURCE=500.
+
+2014-06-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Typo in diagnostic output: wspawnlp.
+
+2014-06-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Changes for FreeBSD 9.
+
+	* configure: Use pointer-based test for timegm, because
+	-Werror=implicit-function-declaration does not work in the
+	gcc 4.2 used on FreeBSD 9.
+
+	* parser.l: Check for Flex 2.5.9 and earlier which don't
+	have yylex_destroy. Thanks to Marcus Breiing.
+
+2014-06-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Changes for building on Solaris 10 using the
+	/usr/bin/xpg4/sh shell. Solaris' /bin/sh does not like test
+	-e. Adding break to the new shell existence testing loop so we
+	use the first shell in the list. Solaris wants _XOPEN_SOURCE=500
+	to reveal certain functions. Fix breakage in the make utility
+	detection, and also use the $make variable everywhere instead
+	of make.
+
+2014-06-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Defend against legacy, non-POSIX /bin/sh implementations.
+	We boostrap using #!/bin/sh, but try to detect a better shell
+	and re-execute the script with that shell. Furthermore, we now
+	set up the SHELL variable in config.make, so that make uses that
+	shell for executing build recipes.
+
+2014-06-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_lisp1): Function removed.
+	(op_dwim, dwim_locs): Removing silly logic of separately calling
+	eval_lisp1 on the functor, and eval_lisp1_args on its arguments, since
+	lisp1 evaluation treats all position the same way.
+
+2014-06-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Documenting the return value of rplaca and rplacd, and changing
+	it to be the cell, rather than the new value.
+
+	* eval.c (transform_op): Fix use of rplacd that uses return value.
+	(force): Likewise.
+
+	* lib.c (rplaca, rplacd): Return cons.
+	(rem_lazy_rec, obj_init): Fix use of rplacd that uses return value.
+
+	* txr.1: Documented.
+
+2014-05-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	The call operator should be a function!
+
+	* eval.c (call): New static function.
+	(eval_args, op_call): Static functions removed.
+	(eval_init): call_s registered as operator rather than function.
+
+	* txr.1: Updated.
+
+2014-05-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 89
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped. 
+
+	* txr.spec: Bumped version.
+
+	* RELNOTES: Updated
+
+2014-05-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	String type related bugfixes: neglecting to handle all three kinds in
+	some places. In particular, the test case
+
+	  echo : | ./txr -c '@a:@a' -
+
+	breaks because of neglected LIT in do_match_line.
+
+	* arith.c (tofloat, toint): Handle LIT type in switch.
+
+	* lib.c (ref, refset, replace, update): Handle LSTR type.
+
+	* match.c (do_match_line, do_output_line): Handle LSTR and LIT
+	objects in switch.
+
+2014-04-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (get_line, get_char, get_byte): Fix outdated, incorrect
+	optional argument defaulting logic.
+
+2014-04-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c, gc.c, rand.c, regex.c, signal.c: Remove inclusion of unneeded
+	headers.
+
+2014-04-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (make_var_shadowing_env): Remove unnecessary test for
+	colon symbol.
+
+2014-04-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rangev_func, range_star_v_func): Use numeric
+	equivalence comparison for end test, rather than eql.
+
+2014-04-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (eql): Bugfix: not handling floating-point types!
+	Two objects which are equal floating-point values must be considered
+	eql even if they are distinct objects (not eq).
+
+2014-04-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 88
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped. Generational GC is now
+	enabled by default.
+
+	* txr.spec: Bumped version.
+
+	* RELNOTES: Updated
+
+	* txr.vim: Regenerated.
+
+2014-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (CHECKOBJ_VEC_SIZE, FRESHOBJ_VEC_SIZE): Increase
+	to 8 * HEAP_SIZE from 2 * HEAP_SIZE to reduce frequency
+	of garbage collections.
+
+2014-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Updating generational GC notes in light of changes.
+
+2014-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Change to how locations are passed around, for the sake of generational
+	GC. The issue being solved here is the accuracy of the gc_set function.
+	The existing impelmentation is too conservative. It has no generation
+	information about the memory location being stored, and so it assumes
+	the worst: that it is a location in the middle of a gen 1 object.
+	This is sub-optimal, creating unacceptable pressure against the
+	checkobj array and, worse, as a consequence causing unreachable gen 0
+	objects to be tenured into gen 1.
+
+	To solve this problem, we replace "val *" pointers with a structure
+	of type "loc" which keeps track of the object too, which lets us
+	discover the generation.
+
+	I tried another approach: using just a pointer with a bitfield
+	indicating the generation.  This turned out to have a serious issue:
+	such a bitfield goes stale when the object is moved to a different
+	generation. The object holding the memory location is in gen 1, but the
+	annotated pointer still indicates gen 0. The gc_set function then
+	makes the wrong decision, and premature reclamation takes place.
+
+	* combi.c (perm_init_common, comb_gen_fun_common,
+	rcomb_gen_fun_common, rcomb_list_gen_fun): Update to new interfaces
+	for managing mutation.
+
+	* debug.c (debug): Update to new interfaces for managing mutation.
+	Avoid loc variable name.
+
+	* eval.c (env_fbind, env_fbind): Update to new interfaces
+	for managing mutation.
+	(lookup_var_l, dwim_loc): Return loc type and update to new interfaces.
+	(apply_frob_args, op_modplace, op_dohash, transform_op, mapcarv,
+	mappendv, repeat_infinite_func, repeat_times_func): Update to new
+	interfaces for managing mutation.
+
+	* eval.h (lookup_var_l): Declaration updated.
+
+	* filter.c (trie_add, trie_compress, trie_compress_intrinsic,
+	* build_filter, built_filter_from_list, filter_init): Update to new
+	* interfaces.
+
+	* gc.c (gc_set): Rewritten to use loc type which provides the exact
+	generation. We do not need the in_malloc_range hack any more, since
+	we have the backpointer to the object.
+	(gc_push): Take loc rather than raw pointer.
+
+	* gc.h (gc_set, gc_push): Declarations updated.
+
+	* hash.c (struct hash): The acons* functions use loc instead
+	of val * now.
+	(hash_equal_op, copy_hash, gethash_c, inhash, gethash_n, pushhash,
+	remhash, set_hash_userdata, hash_next, group_by, hash_keys,
+	hash_values, hash_pairs, hash_uni, hash_isec, hash_update,
+	hash_update_1): Updated to new interfaces for managing mutation.
+	(hash_grow): Needs hash table argument to call the new form of set.
+	(hash_process_weak): We need to use valptr to recover the val *
+	from the loc that we receive from some functions now.
+
+	* hash.h (gethash_c, gethash_f): Declarations updated.
+	(gethash_l): Inline function's prototype changes.
+
+	* lib.c (rplaca, rplacd, car_l, cdr_l, listref_l, tail, lastcons, last,
+	ltail, list_collect, list_collect_nconc, list_collect_append, nreverse,
+	lazy_appendv_func, lazy_appendv): Update to new interfaces.
+	(malloc_low_bound, malloc_high_bound): Static variables removed.
+	(adjust_bounds): Static function removed.
+	(chk_malloc, chk_malloc_gc_more, chk_calloc, chk_realloc):
+	Calls to adjust_bounds removed.
+	(in_malloc_range): Function removed.
+	(get_plist_f, string_extend, length_str, replace_str, make_sym,
+	delete_package, intern, rehome_sym, get_user_package,
+	get_system_package, get_keyword_package, func_get_env, vec_set_length,
+	vecref, vecref_l, vec_push, simple_lazy_stream_func, lazy_stream_func,
+	lazy_str, lazy_str_force, lazy_str_force_upto, acons_new, acons_new_c,
+	aconsql_new, aconsql_new_c, alist_nremove, alist_nremove1, merge,
+	sort_list, refset, obj_init): Update to new interfaces.
+
+	* lib.h (loc): New typedef.
+	(gc_set): Interface change.
+	(mkloc_fun): New inline function.
+	(mkloc, mkcloc, nulloc, nullocp, deref, valptr): New macros
+	(set): Interface change: takes loc as first argument,
+	rather than lvalue expression.
+	(mpush): Interface change: second argument is loc, rather
+	than lvalue.
+	(keyword_package, user_package, system_package, gensym_counter): Use
+	deref rather than dereference operator.
+	(in_malloc_range): Declaration removed.
+	(car_l, cdr_l, listref_l, tail, lastcons, ltail, getplist_f,
+	get_user_package, get_system_pckage, get_keyword_package,
+	vecref_l, acons_new_c, aconsql_new_c): Declarations updated.
+	(list_collect_decl): Updated to follow new interfaces.
+
+	* match.c (dest_set, h_coll, v_gather, v_collect, v_cat, v_output,
+	v_filter): Updated to follow new interfaces.
+
+	* parser.y (expand_meta, rlset): Updated to follow new interfaces.
+
+	* rand.h (random_state): Use deref.
+
+	* stream.c (string_in_get_line, string_in_get_char,
+	string_in_unget_char, strlist_out_put_string, strlist_out_put_char):
+	Updated to follow new interfaces.
+
+	* stream.h (std_input, std_output, std_debug, std_error,
+	std_null): Use deref macro.
+	(lookup_var_l): Declaration updated.
+
+	* syslog.c (syslog_put_string, syslog_put_char, syslog_put_byte,
+	syslog_set_prop): Updated to follow new interfaces.
+
+	* unwind.c (uw_register_subtype): Updated to follow
+	new interfaces.
+
+2014-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Generational GC tweaks.
+
+	* gc.c (make_obj): If we have room in the freshobj array,
+	but are out of objects, then call more. Without this,
+	we don't take proper advantage of this nursing area.
+	(gc): Set the full_gc flag after doing gc, in preparation
+	for next time. If we know full GC is coming, we can
+	adjust some behaviors. Increase the threshold for calling the more()
+	function to be the same as in the non-generational case:
+	less than 3/4 of the size of a heap scavenged.
+	(gc_set): Now does nothing if it is known that
+	a full gc is coming. Also, in the checkobj array overflow
+	case when we invoke gc, there is no point in adding obj
+	to the array, since it must have been promoted to the mature
+	generation.
+	(gc_mutated): Don't bother storing the object in the
+	array if a full GC is coming.
+
+2014-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (string_time): If possible, change the timezone in the
+	struct tm from "GMT" to "UTC", so that the time_string_utc
+	function will use UTC for the %Z format.
+
+2014-03-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix a bug arising from putting generation 1 objects into the
+	checkobj array (via the mut macro that expands to gc_mutated).
+	The garbage collector assumes that checkobj has only generation 0
+	objects, which all exist in the freshobj array, which is subject
+	to a sweep. So gen 1 objects in checkobj are never cleaned up
+	properly: they do not have their REACHABLE flag reset, or
+	their generation restored to 1. To fix this, a new array for these
+	objects is introduced separate from checkobj.
+
+	* gc.c (MUTOBJ_VEC_SIZE): New preprocessor symbol.
+	(mutobj, mutobj_idx): New static array and integer.
+	(mark_obj): Check for REACHABLE flag before checking the full_gc
+	flag and generation, since those cost additional memory accesses.
+	(mark): Mark the objects in the new mutobj array.
+	(sweep): Sweep the objects in the mutobj array.
+	(gc): Reset mutobx_idx to zero after gc.
+	(gc_set): Rearrange logic. In the case that the checkobj array
+	is full and a gc is done to make room, there is no point in
+	adding to the array: the gc pass moves all babies to generation 1,
+	so the object that was passed into the function is no longer a baby.
+	(gc_mutated): Rewrite in terms of mutobj rather than checkobj,
+	fixing the bug.
+
+	* HACKING: Improved documentation of GC. Describe mut macro
+	and mutobj array.
+
+2014-03-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	More generational GC fixes. One GC fix.
+
+	* combi.c (perm_init_common, comb_gen_fun_common,
+	rcomb_gen_fun_common): Use set macro instead of plain assignment.
+
+	* hash.c (hash_grow, copy_hash, hash_update_1): Use set macro
+	instead of plain assignment.
+
+	* lib.c (nreverse, lazy_appendv_func, lazy_appendv,
+	vec_push, refset): Use set macro instead of plain assignment.
+	(make_package): Assign all fields of the newly created PKG
+	object before calling a function which can trigger GC.
+
+	* parser.y (rlset): Use set macro.
+
+2014-03-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix generational GC regression caused by fixes
+	in in 2014-03-12, when prof was introduced.
+	The attempt to fix a bug made things worse.
+
+	* lib.c (adjust_bounds): New static function.
+	(chk_malloc, chk_calloc, chk_realloc): Replace existing logic with
+	call to adjust_bounds.
+	(chk_malloc_gc_more): Bugfix: add missing call to adjust_bounds.
+
+2014-03-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Update for WLL's and QLL's.
+
+	* txr.vim: Regenerate.
+
+2014-03-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (me_quasilist): New static function.
+	(eval_init): Register me_quasilist as quasilist macro expander.
+
+	* lib.c (quasilist_s): New global variable.
+	(obj_init): quasilist_s initialized.
+
+	* lib.h (quasilist_s): Declared.
+
+	* match.c (do_txreval): Handle quasilist syntax.
+
+	* parser.l (QWLIT): New exclusive state.
+	Extend lexical grammar to transition to QWLIT state upon
+	the #` or #*` sequence which kicks off a word literal,
+	and in that state, piecewise lexically analyze the QLL,
+	mostly by borrowing rules from quasiliterals.
+
+	* parser.y (QWORDS, QWSPLICE): New tokens.
+	(n_exprs): Integrate splicing form of QLL syntax.
+	(n_expr): Integrate non-splicing form of QLL syntax.
+	(litchars): Propagate line number info.
+	(quasilit): Fix "string literal" wording in error message.
+
+	* txr.1: Introduced WLL abbreviation for word list literals,
+	cleaned up the text a little, and documented QLL's.
+
+2014-03-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_quasi): Bugfix: incorrect logic, failing
+	to macro-expand the embedded forms in a quasiliteral except
+	when they are the very first item.
+
+2014-03-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (yybadtoken): Add missing cases for new token
+	types WORDS and WSPLICE.
+
+2014-03-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Introducing word list literals.
+
+	* parser.l (WLIT): New exclusive start state.
+	Extend lexical grammar to transition to WLIT state upon
+	the #" or #*" sequence which kicks off a word literal,
+	and in that state, piecewise lexically analyze the literal,
+	mostly by borrowing rules from other literals.
+
+	* parser.y (WORDS, WSPLICE): New tokens.
+	(n_exprs): Integrate splicing form of word list literal syntax.
+	(n_expr): Integrate non-splicit for of word list literal syntax.
+	(litchars): Propagate line number info.
+	(wordslit): New grammar rule.
+
+	* txr.1: Updated.
+
+2014-03-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register last function as intrinsic.
+
+	* lib.c (last): New function.
+
+	* lib.h (last): Declared.
+
+	* txr.1: Documented last.
+
+2014-03-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register empty as intrinsic.
+
+	* lib.c (copy): Bugfix: handle lazy strings. Also, handle hash
+	tables via copy_hash.
+	(length): Bugifx: handle lazy strings. Also, handle hash tables
+	via hash_count.
+	(empty): New function.
+
+	* lib.h (empty): Declared.
+
+	* txr.1: Documented.
+
+2014-03-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (not_s): New symbol var.
+	(me_unless, me_while, m_until): New static functions.
+	(eval_init): Register macros unless, while and until.
+
+	* txr.1: Document unless, while and until.
+
+2014-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 87
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated
+
+	* txr.vim: Regenerated.
+
+2014-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (w_fopen, w_popen, w_freopen, w_remove, w_rename): Revert
+	2014-03-14 changes.
+
+2014-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (me_when): New static function.
+	(eval_init): Register "when" macro.
+
+	* txr.1: Documented when macro.
+
+2014-03-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Second round of bugfixing on the theme of the previous commit.
+	Here were are changing the output clause to recognize all special
+	clause tokens that are not used in output and turning them into
+	regular Lisp.  So @(if a b c) in an output clause works once again,
+	recognized as IF exprs_opt ')' syntax, and turned into Lisp. Other
+	things work that didn't work before like @(and), @(or) and so forth.
+
+	* parser.y (make_expr): New static function.
+	(not_a_clause): New nonterminal.
+	(out_clause): Remove error-catching productions for match-side
+	clauses.
+	(o_elems): Now consists of a mixture of o_elems and not_a_clause's.
+
+2014-03-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing gaping bug in the handling of @-delimited expressions
+	within quasiliterals. This has been a problem for years.
+	Quasiliteral strings existed very early before TXR Lisp was introduced.
+	So it made sense that when @ is seen in a quasiliteral, the
+	lexical analyzer pushed into the SPECIAL state in which directives
+	are recognized, like in the pattern language. I noticed
+	this because there is an @(if) directive now, which prevents
+	`@(if ...)` from being valid.
+
+	* parser.l (QSPECIAL): New scanner state. This is a state
+	similar to SPECIAL that we enter into when @ is seen in a QSLIT state.
+	In this state we recognize constructs like braced variables, but not
+	certain other features like directives.
+
+2014-03-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (int_flo): Fix non-handling of negative values.
+
+2014-03-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (tofloat, toint): New functions.
+
+	* arith.h (tofloat, toint): Declared.
+
+	* eval.c (eval_init): tofloat and toint registered
+	as intrinsics.
+
+	* txr.1: Documented.
+
+2014-03-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 86
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated
+
+	* dep.mk: Regenerated.
+
+2014-03-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (win_make_cmdline): I think I cracked the code of
+	passing escaped arguments to Microsoft's popen and system
+	functions. The first argument cannot be quoted, but the
+	subsequent ones can. It is the quoting of the first argument
+	that causes the whole thing to be quoted. So we just
+	avoid quoting the first argument. (If it has spaces, too bad;
+	don't do that).
+	(open_process): Fix neglected optional argument handling
+	in Windows version of this function.
+
+2014-03-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Detect _wspawn* functions.
+
+	* stream.c (run): Implement using _wspawnvp on MinGW.
+
+2014-03-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Bugfix. When handling a backslash-newline continuation
+	in the SPECIAL, NESTED and BRACED states, do not pop the state in all
+	three, only in SPECIAL (to terminate the @\ continuation).
+
+	* txr.1: Eliminate wrong claim that string literals do not split across lines,
+	which is directly contradicted two paragraphs later.  Document that
+	quasiliterals also split.
+
+	* genvim.txr (txr_regex, txl_regex): These definitions change from "syn match"
+	to "syn region" so that the backslash-newline continuation can be properly
+	handled.
+	(txr_string, txr_quasilit): Correctly handle split literals.
+
+	* txr.vim: Regenerated.
+
+2014-03-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (text): Allow the EMPTY token (the @(empty) syntax)
+	to be a text.
+
+	* txr.1: Documented @(empty).
+
+2014-03-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (regex_parse, lisp_parse): Fix neglected handling of
+	optional arguments. This problem can cause the symbol : to be
+	planted as the std_error stream, resulting in an error loop
+	that blows the stack.
+
+	* regex.c (regex_compile): Likewise.
+
+2014-03-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (w_fopen, w_popen, w_freopen, w_remove, w_rename): We
+	have similar functions in the MSVCRT library used by MinGW,
+	so if _WIN32 is defined, our functions now just wrap those.
+
+2014-03-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (run): Fix MinGW build failures. The run function doesn't
+	work right with arguments, though: the win command line is broken.
+
+2014-03-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Make seed argument optional in make-random-state.
+
+	* rand.c (make_random_state): Do argument defaulting on seed.
+	Also, mix getpid() into the seed.
+	(random_fixnum): Bugfix: do proper defaulting on optional
+	agument, rather than relying on nil.
+	(random): Fix 2014-02-05 regression. This was totally broken,
+	ignoring the random state passed in and using the global
+	random state. This function must only use the state passed in;
+	there is no defaulting to the global random state.
+
+	* txr.1: Documenting that seed is optional in make-random-state.
+	Describing what guarantees can be expected with regard to
+	calls made close together temporally.
+
+2014-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing @(if)/@(elif)/@(else) in the pattern language.
+	Input side for now; output later.
+
+	* parser.y (if_clause, elif_clauses_opt, else_clause_opt): New nonterminals.
+	(IF, ELIF, ELSE): New tokens.
+	(yybadtoken): Handle IF, ELIF, ELSE.
+
+	* parser.l: Recognize and return new tokens IF, ELIF and ELSE.
+
+	* txr.1: Documented.
+
+	* genvim.txr: Updated with if, elsif and else directive keywords.
+
+	* txr.vim: Regenerated
+
+2014-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	On platforms with sigaltstack, TXR programs can now catch the
+	segmentation fault that occurs when running out of stack space,
+	and escape by throwing an exception.
+
+	Also, bugfix: save and restore the gc enable/disable state.  Without
+	this, if we are ever running cod in a gc disabled state and it jumps
+	out, gc stays disabled.
+
+	* configure: added check for sigaltstack.
+
+	* gc.h (gc_enabled): Declaration added for existing variable.
+
+	* signal.c (is_cpu_exception): New static function.
+	(sig_handler): For cpu_exception type signals that pertain
+	to the execution of some instruction, turn on async_sig_enabled,
+	so that the signal is not deferred. Otherwise we will just
+	return without calling the user-defined handler, restart
+	the instruction and get into a loop. Also, disable gc around
+	the handler just in case. One issue is that we might be on
+	an alternate stack, which gc won't like.
+	(setup_alt_stack, teardown_alt_stack): New static functions.
+	(set_sig_handler): If we have sigaltstack, and are asked
+	to set up a SEGV handler, then set it up on the alternate
+	stack.
+
+	* signal.h (extended_jmp_buf): Adding new member, gc.
+	(extended_setjmp, extended_longjmp): use gc member
+	to save and restore the gc_enable state across
+	setjmp and longjmp.
+
+2014-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (open_process): If execvp fails, use errno as the
+	exit status.
+	(sh, run): New static functions.
+	(stream_init): sh and run registered as intrinsics.
+
+2014-03-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (iffi): Bugfix: was still using incorrect, outdated optional
+	argument defaulting logic.
+
+2014-03-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (plus_s, prof_s): New symbol global variables.
+	(op_prof, me_pprof): New static functions.
+	(eval_init): Intern prof symbol, store in prof_s.
+	Captured interned + symbol in plus_s. Register prof operator and pprof
+	macro.
+
+	* gc.c (gc_bytes): New global variable.
+	(more): Use nse function chk_malloc_gc_more instead of chk_malloc.
+	(make_obj): Increment gc_bytes.
+
+	* lib.c (malloc_bytes): New global variable.
+	(chk_malloc, chk_realloc): Increment malloc_bytes.
+	(chk_calloc): Bugfix: incorrect size in recursion into oom_realloc.
+	Incorrect calculation of malloc_high_bound.  Increment malloc_bytes.
+	(chk_malloc_gc_more): New function.
+
+	* lib.h (alloc_bytes_t): New typedef.
+	(malloc_bytes, gc_bytes): Declared.
+	(chk_malloc_gc_more): Declared.
+
+	* stream.c (format_s): New symbol global.
+	(stream_init): format_s inited.
+	format_s used to register formatv function.
+
+	* stream.h (format_s): Declared.
+
+	* txr.1: Documented prof and pprof.
+
+	* genvim.txr: Recognize reg_fun calls with intern
+	followed by a preceding assignment or other syntax.
+
+	* txr.vim: Updated.
+
+2014-03-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: new test for fcntl.
+
+	* stream.c (open_process): Fixed off-by one erroneous value of nargs,
+	causing memory leak of one string. Fixed memory leak on fork failure.
+	Fixed a deadlock that can occur in the pipe close function when
+	multiple pipes are in existence. This is fixed by setting the
+	FD_CLOEXEC flag on the pipe file descriptor. Without this, one child
+	process can hold another's pipe open, causing that other one not to
+	terminate when we're trying to shut it down, resulting in that child
+	blocked on a write, while we block on waitpid.
+
+2014-03-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (open_process): In the event of fdopen failure,
+	kill the child process less abruptly by hitting it with SIGINT and
+	SIGTERM, rather than with SIGKILL. Also, collect the child
+	process with waitpid.
+
+2014-03-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Registration of url_encode and url_decode
+	moved to filter.c.
+
+	* filter.c (trie_compress_intrinsic, html_encode, html_decode): New
+	static functions.
+	(filter_init): Register make_trie, trie_add, trie_compress_intrinsic,
+	filter_string_tree, filter_equal, html_encode and html_decode
+	as intrinsics. Move registration of url_encode and url_decode here.
+
+	* genvim.txr: Look for registrations in filter.c too.
+
+	* txr.1: Documented.
+
+	* txr.vim: Updated.
+
+2014-03-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (open_process): Close the original pipe file descriptor
+	in the child process after dup2-ing it to standard input or standard
+	output, so the child doesn't have to references to the pipe.
+
+2014-03-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (pipe_close): Restructured the function a bit.
+	Do not throw exceptions for normal process terminations, only for
+	abnormal ones (terminated by a signal). Return the termination
+	status instead of just t.
+
+	* txr.1: Fixed the neglected documentation of the optional boolean
+	argument of close-stream. Described the behaviors with regard
+	to pipes in more detail.
+
+2014-03-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_trailer): Fix segfault. The code which
+	helps implement the special interaction between @(accept) and
+	@(trailer) was not handling the situation when there is not
+	current unwind exit point.
+
+2014-03-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Syntactic tweak. Do not allow the "extra"
+	constituent chars # or ^ to start the symbol name after an @.
+	Prior to this change @^a is a "meta-symbol" whose name is "^a",
+	but ^a is the ^ quasiquote notation followed by symbol a.
+	After this change @^a is meta, applied to quasiquote-a.
+
+2014-03-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (lazy_sub_str): Bugfix: "from" was mistakenly used
+	in the adjustment of the "to" value.
+
+	* match.c (search_form): Use predefined constants for -1 and 1
+	instead of calling num.
+
+2014-03-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing broken processing of horizontal matching across
+	long lines produced by @(freeform). Once the matching
+	passes about 4000 characters, the "consume_prefix"
+	function kicks in to save memory. Then any code which is
+	not properly written to handle this displaced situation
+	will break.
+
+	* match.c (h_text, h_var, h_coll, h_parallel, h_fun): Bugfix.
+	The recursive calls to match_line return an absolute position.
+	From this value we must subtract c->base if we are to 
+	compare it with c->pos, or update c->pos.  If we use the
+	absolute value, we are abruptly jumping ahead in the data.
+
+2014-03-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Issue: match_regex and search_regex were continuing to feed characters
+	to the regex machine even when there is no transition available.  This
+	was due to the broken return value protocol of regex_machine_feed.  For
+	instance for the regex / +/ (one or more spaces), after matching some
+	spaces, it would report REGM_INCOMPLETE for additional non-space
+	characters, never reporting REGM_FAIL.
+
+	* regex.c (regm_result_t): Block comment added, documenting protocol.
+	(regex_machine_feed): Return REGM_FAIL if there are no transitions for
+	the given character, even a partial match has been recorded. This is
+	a signal to stop feeding more characters. At that point, the function
+	can be called with a null character to distinguish the three cases:
+	fail, partial or full match. 
+	(search_regex): Now when the search loop gets a REGM_FAIL, it can
+	no longer assume that nothing was matched and the search must restart
+	at the next position. Upon the REGM_FAIL signal, it is necesary to
+	seal the search by feeding in the 0 character. Only if that returns
+	REGM_FAIL is it a no match situation. Otherwise it is actually a match!
+
+2014-03-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 85
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated
+
+	* txr.vim: Updated.
+
+2014-03-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Added missing documentation for @(forget)/@(local).
+
+2014-03-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (rand_init): Oops! Spectacular silliness here
+	broke the symbol module: two intern calls in consecutive
+	lines, one for the name without "earmuffs", one with,
+	leading to the situation that the C code looks for a
+	dynamic variable that does not exist.
+
+2014-03-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (LOG_MATCH, LOG_MISMATCH): Wouldn't you know it;
+	the format strings in these macros contained a workaround for
+	the broken * variable field width syntax, specifying
+	~*~a where the extra ~ in the middle just feeds a character
+	that the broken state machine expects.  These workarounds broke when I
+	fixed the formatting, making -v mode useless.
+
+2014-03-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 84
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated
+
+	* txr.vim: Updated.
+
+2014-03-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (upop): New function.
+
+	* lib.h (upop): Declared.
+
+	* txr.c (txr_main): Two bugfixes. One is that the argument -
+	was being pushed back twice resulting in *args* being ("-" "-").
+	This is because the option processing loop checked for "-" and pushed
+	it back into args, and then some logic after the loop pushed arg back
+	into args again. But, these pushes were wrong because they push
+	back a different cons cell; we would like to be able to
+	do (ldiff *full-args* *args*). This is solved by upop, which provides
+	one element of undo. After upop, we can restore the prior list
+	from the undo save location.
+
+2014-03-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (assert_s): New global variable.
+	(obj_init): Intern assert symbol, store in assert_s.
+
+	* lib.h (assert_s): Declared.
+
+	* match.c (typed_error, v_assert, h_assert): New static functions.
+	(dir_tables_init): Register v_assert and h_assert.
+	Register assert_s as non-data-matching directive.
+
+	* unwind.c (uw_init): Register assert as a subtype
+	of error.
+
+	* txr.1: Describe assert.
+
+2014-03-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c: (v_next): Set the "curfile" in the context to "env" when
+	scanning environment.
+	(open_data_source): Regression: was not setting c->curfile when opening
+	anything.
+
+2014-03-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (apply_intrinsic, lazy_mapcar): Changed linkage to external.
+
+	* eval.h (apply_intrinsic, lazy_mapcar): Declarations added.
+
+	* stream.c (open_files, open_file_star): New functions.
+	(stream_init): Registered new functions as intrinsics.
+
+	* txr.1: Documented open-files and open-files*. Added to make-catenated-stream documentation.
+
+	* genvim.txr: Replace bunch of code with open-files.
+
+	* txr.vim: Regenerated.
+
+2014-03-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_files): Fix it again. The data (nil)
+	can occur from an interactive/real-time stream.
+
+2014-03-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	g++ regressions.
+
+	* eval.c (env_k): Duplicate global variable definition removed.
+	
+	* lib.c (vector, vec_set_length): Fixed signed/unsigned comparison
+	warnings.
+
+	* stream.h (stdin_s, stdout_s, stddebug_s, stderr_s, stdnull_s):
+	Declarations were definitions due to missing extern.
+
+2014-03-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): Don't push back arg into arg_list if arg is nil.
+
+2014-03-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing regression caused by the 2014-02-19 change ("Fixed long-running
+	issue ...").
+
+	* match.c (open_data_source): if c->data is t, but c->files
+	is nil, set c->data to nil: we cannot possibly open anything later.
+	(match_files): We need to call open_data_source one more time just
+	before processing a line with horizontal material.  The previous
+	call(s) to open_data_source might not have opened anything. Before
+	accesing car(c.data) the correct test is consp(c.data), not c.data. In
+	the else clause, we now specificially check for nilp(c.data) which is
+	the correct indicator of no more data. If c.data is any other atom at
+	that point, we have an internal error, for which an assertion is added
+	now.
+
+2014-03-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Fix broken parsing of parameteric width and
+	precision (i.e. given by *). The simplest way to do this is to add a
+	state vf_star which is similar to vf_digits, and reuses much of the
+	logic via a goto. Fixing forgotten --fmt (push back char) when moving
+	from vf_precision to vf_spec state due to unhandled character.
+	Also, allowing a leading zero before a precision given as *
+	so that computed precisions can be combined with zero padding.
+
+	* txr.1: Documented leading zero better so it is clear it
+	combines with *. Restructured documentation.
+
+2014-03-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (put_line): Default string argument to empty string.
+	(stream_init): Change how put_line is registered to take advantage of
+	new optional parameter.
+
+	* txr.1: Updated.
+
+2014-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (logten): New function.
+
+	* eval.c (eval_init): logten registered as intrinsic.
+
+	* lib.h (logten): Declared.
+
+	* txr.1: Documented.
+
+2014-03-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Allowing ^ to be a quote character, and adjusting definition
+	of identifiers to rule this out from being the first character of a
+	symbol which has no prefix. Recognize the ^ character as a token in the
+	NESTED state.
+
+	* lib.c (obj_print, obj_pprint): Render sys:qquote as ^.
+
+	* parser.y (choose_quote): Function removed.
+	(n_expr): Recognize '^' as quasiquote. Removed all the "smart quote"
+	hacks that try to make quote behave as quote or quasiquote, or try to
+	cancel out unquotes and quotes.
+
+	* tests/009/json.txr: Fixed to ^ quasiquote.
+
+	* tests/010/reghash.txr: Likewise.
+
+	* tests/011/macros-2.txr: Likewise.
+
+	* tests/011/mandel.txr: Likewise.
+
+	* tests/011/special-1.txr: Likewise.
+
+	* txr.1: Updated docs.
+
+	* genvim.txr: Revamped definitions for txr_ident and txl_ident so that
+	unqualified identifiers cannot start with # or ^, but ones with @ or :
+	in front can start with these characters.
+
+	* txr.vim: Regenerated.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (lex.yy.c): Remove lex.yy.c before trying to regenerate it.
+	(y.tab.c, y.tab.h): Remove y.tab.c before running yacc. Write-protect
+	y.tab.c, not $@, which could expand to the y.tab.h target if that is
+	what triggered the rule.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Incorporating more corrections from Roman Mishin.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (make_env_intrinsic): New static function.
+	(eval_init): Register new intrinsics make-env, env-fbind and env-vbind.
+	
+	* txr.1: Documented.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 83
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated
+
+	* dep.mk: Updated.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand): Bugfix. When processing a defvar, should mark
+	the variable as special at expansion time. Without this, binding
+	forms in other parts of the tree won't be expanded properly
+	to bring about the special semantics.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (unquotes_occur): Fix use of unquote_s rather than sys_unquote_s
+	which breaks backquote, caught by tests/010/reghash.txr.
+	I thought fixed this already! But I must have made the change to y.tab.c
+	rather than parser.y.
+
+	* Makefile (lex.yy.c, y.tab.c): Make these files readonly to prevent
+	unintended edits.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Skip lines that contain system_package.
+
+	* txr.vim: Regenerated.
+
+2014-03-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: catenated stream objects not hooked into garbage collector,
+	causing premature collection of the catenated stream list.
+
+	* stream.c (cat_mark): new function.
+	(cat_stream_ops): use cat_mark for gc mark function.
+
+2014-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	New quasiquote idea: let's have two quasiquote macros sharing one
+	expander. One macro based on sys:qquote, sys:unquote and sys:splice,
+	and the other based on qquote, unquote and splice in the user package.
+	The read syntax puts out the sys: one.
+
+	* eval.c (expand_qquote): Takes three additional arguments: the
+	qquote, unquote and splice symbols to recognize.
+	The invalid splice diagnostic is adjusted based on which backquote
+	we are expanding.
+	(me_qquote): Look at the symbol in the first position of the form
+	and then expand either the internal quasiquote macro or the public one,
+	passing the right symbols into expand_qquote.
+	(eval_init): Register error-throwing stub functions
+	for the sys_qquote_s, sys_unquote_s and sys_splice_s symbols.
+	Register a macro for sys_qquote_s.
+
+	* lib.c (sys_qquote_s, sys_unquote_s, sys_splice_s): New symbol
+	variables.
+	(obj_init): Initialize new variables. Change qquote_s,
+	unquote_s and splice_s to user package.
+	(obj_print, obj_pprint): Convert only sys_qquote_s,
+	sys_unquote_s and sys_splice_s to the read syntax.
+	The quote_s, unquote_s and splice_s symbols are not
+	treated specially.
+
+	* lib.h (sys_qquote_s, sys_unquote_s, sys_splice_s): Declared.
+
+	* parser.y (n_expr): Use sys_qquote_s, sys_unquote_s and
+	sys_splice_s rather than qquote_s, unquote_s and splice_s.
+	(unquotes_occur): Likewise.
+
+	* txr.1: Documented.
+
+2014-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: changed numerous "if ! conftest" tests to "if conftest",
+	swapping around the consequent and alternative clauses.
+
+2014-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (conftest, conftest_o): New functions
+	Use functions throughout tests instead of repeated code for removing
+	target, invoking make with redirection and testing for existence of
+	target.
+
+2014-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/011/special-1.txr: Add some coverage for evaluation
+	of a re-bound special under the Lisp-1 evaluation of the [ ]
+	notation. This test case would have failed three commits
+	back.
+
+2014-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_qquote): Another bugfix: not recognizing a trailing
+	atom that comes out of recursive call, wrapped in (quote ...),
+	resulting in '(,a . b) expanding to (append 'a . quote b)
+	rather than (append (list 'a) (quote b)); i.e.  (append (list 'a) 'b).
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (lookup_sym_lisp1): Bugfix: wasn't following the dynamic
+	environment at all, and still had vestiges of support for the the old
+	cptr based global variables.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: Use target-specific assignment
+	to suppress TXR_DBG_OPTS for tests under tests/011.
+	The --gen-gc makes mandel.txr run too slow.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (self_evaluating_p, maybe_quote): New functions.
+	(expand): Use maybe-quote form macro-time, to not quote
+	result unnecessarily.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/011/mandel.expected: New file.
+
+	* tests/011/mandel.txr: New file.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Turn *gensym-counter* into proper special variable.
+
+	* eval.c (eval_init): Save *gensym-counter* symbol in gensym_counter_s
+	symbol variable right after interning, and use zero as the inital value
+	rather than the gensym_counter variable which is removed now.
+
+	* lib.c (gensym_counter_s): New symbol variable.
+	(gensym_counter): Variable removed.
+	(gensym): Slight refactoring to avoid a double variable lookup.
+	Also, for generational GC correctness, use the set macro to update it,
+	since the variable could live inside heap object and the counter
+	could overflow to bignums which are heap objects.
+	(obj_init): Remove initialization of gensym_counter.
+
+	* lib.h (gensym_counter_s): Declared.
+	(gensym_counter): Declaration removed, replaced by macro.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Change in the design of how special variables work, to fix the broken
+	re-binding. C code now has to go through the dynamic environment lookup
+	to access things like *random-state*, or *stdout*.  As part of this,
+	I'm moving some intrinsic variable and function initializations out of
+	eval.c and into their respective modules.  Macros are are used to make
+	global variables look like ordinary C variables.  This is very similar
+	to the errno trick in POSIX threads implementations.
+
+	* eval.c (looup_var, lookup_var_l): Restructured to eliminate silly
+	goto, the cobjp handling is gone.
+	(reg_fun, reg_var): Internal function becomes external.
+	reg_var registers a simple cons cell binding now, without any
+	C pointer tricks to real C global variables.
+	(c_var_mark): Static function removed.
+	(c_var_ops): Static struct removed.
+	(eval_init): Numerous initializations for streams, syslog, rand,
+	signals and others moved to their respective modules.
+	The new symbol variables user_package_s, keyword_package_s
+	and system_package_s are interned here, and the variables are
+	created in a special way.
+
+	* eval.h (reg_var, reg_fun): Declared.
+
+	* gc.c (prot1): Added assert that the loc pointer isn't null.
+	This happened, and blew up during garbage collection.
+
+	* lib.c (system_package, keyword_package, user_package): Variables
+	removed these become macros.
+	(system_package_var, keyword_package_var, user_package_var): New
+	global variables.
+	(system_package_s, keyword_package_s, user_package_s): New
+	symbol globals.
+	(get_user_package, get_system_package, get_keyword_package): New 
+	functions.
+	(obj_init): Protect new variables. Initialization order of modules
+	tweaked: the modules sig_init, stream_init, and rand_init are moved
+	after eval_init because they register variables.
+
+	* lib.h (keyword_package, system_pckage, user_package): Variables
+	turned into macros.
+	(system_package_var, keyword_package_var, user_package_var): Declared.
+	(system_package_s, keyword_package_s, user_package_s): Declared.
+	(get_user_package, get_system_package, get_keyword_package): Declared.
+
+	* rand.c (struct random_state): Renamed to struct rand_state to
+	avoid clash with new random_state macro.
+	(random_state): Global variable removed.
+	(random_state_s): New symbol global.
+	(make_state, rand32, make_random_state, random_fixnum, random):
+	Follow rename of struct random_state.
+	(rand_init): Reference to random_state variable gone. Using
+	reg_var to create the *random-state* variable that is referenced
+	from C using the random_stat macro.
+
+	* rand.h (random_state): Variable removed, replaced by macro
+	that performs dynamic lookup.
+
+	* signal.c (sig_init): References to all the sig_* global variables
+	removed. The signal-related reg_var and reg_fun calls from eval.c moved
+	here.
+
+	* stream.c (std_input, std_output, std_debug, std_error, std_null):
+	Variables removed.
+	(s_ifmt, s_ifsock, s_iflnk, s_ifreg, s_ifblk, s_ifdir,
+	s_ifchr, s_ififo, s_isuid, s_isgid, s_isvtx, s_irwxu,
+	s_irusr, s_iwusr, s_ixusr, s_irwxg, s_irgrp, s_iwgrp,
+	s_ixgrp, s_irwxo, s_iroth, s_iwoth, s_ixoth): Variables removed.
+	(stdin_s, stdout_s, stddebug_s, stderr_s, stdnull_s): New symbol
+	globals.
+	(stream_init): References to removed variables gone. Moved
+	stream-related initializations here from eval.c. The global
+	streams are set up differently.
+
+	* stream.h (std_input, std_output, std_debug, std_error, std_null):
+	Variable declarations replaced by macros.
+	(lookup_var_l): Declared.
+	(s_ifmt, s_ifsock, s_iflnk, s_ifreg, s_ifblk, s_ifdir,
+	s_ifchr, s_ififo, s_isuid, s_isgid, s_isvtx, s_irwxu,
+	s_irusr, s_iwusr, s_ixusr, s_irwxg, s_irgrp, s_iwgrp,
+	s_ixgrp, s_irwxo, s_iroth, s_iwoth, s_ixoth): Declarations removed.
+
+	* syslog.c (log_pid_v, log_cons_v, log_ndelay_v, log_odelay_v,
+	log_nowait_v, log_perror_v, log_user_v, log_daemon_v, log_auth_v,
+	log_authpriv_v, log_emerg_v, log_alert_v, log_crit_v, log_err_v,
+	log_warning_v, log_notice_v, log_info_v,
+	log_debug_v, std_log): Variables removed.
+	(syslog_init): References to removed variables removed.
+	Moved syslog-related initializations here out of eval_init.
+
+	* syslog.h:x (std_log): Declration removed.
+
+	* txr.c (self_path, prog_args_full, prog_args): Variables gone.
+	(txr_main): References to removed varaibles are gone.
+	Moved registration of special variables out of eval_init
+	here.
+
+	* txr.h (self_path, prog_args_full, prog_args): Declarations gone.
+
+	* tests/011/special-1.txr: Test case modified to properly test
+	special variables. Previously it produced the expected output
+	even though *stdout* wasn't rebound properly.
+
+	* tests/011/special-1.expected: Updated.
+
+	* genvim.txr: Updated to follow variable and function registration
+	moves. It has to scan more files than just eval.c. Produces identical
+	contents, so no change to txr.vim.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_defvar): Remove the same-named symbol macro when a
+	variable is defined.
+	(op_defsymacro): Remove the same-named variable when a symbol macro is
+	defined.
+	(op_defun): Throw excpetion if an attempt is made to define a
+	special operator as a function. Remove the same-named macro when a
+	function is defined.
+	(op_defmacro): Throw excpetion if an attempt is made to define a
+	special operator as a macro. REmove the same-named function
+	when a macro is defined.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_qquote): Fix broken '(,x . ,y) case, which
+	is generating (append (list x) . y) instead of (append (list x) y).
+	Also, added a nil case which is now necessary to prevent
+	'(,x) from generating (append (list x) nil), though this is
+	effectively an optimization, which is pointless, since
+	the expander isn't optimizing overall.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/010/output-clauses.expected: New file.
+
+	* tests/010/output-clauses.txr: New file.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	About time for some new regression tests.
+
+	* tests/011/macros-1.expected: New file.
+
+	* tests/011/macros-1.txr: New file.
+
+	* tests/011/macros-2.expected: New file.
+
+	* tests/011/macros-2.txr: New file.
+
+	* tests/011/special-1.expected: New file.
+
+	* tests/011/special-1.txr: New file.
+
+2014-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfixing semantics of symbol macro hiding by variable bindings.
+
+	* eval.c (expand_vars): Expand vars needs to know whether it's
+	handling a sequential (let*-like) or parallel (let-like) binding.
+	The init form of a variable sees the previous macro environment,
+	but that variable must, for the remaining variables, shadow any
+	previous symbol macro.
+	(expand): In expand we must inform expand_vars whether we have
+	a sequential or parallel binding construct. Moreover, there was
+	a huge bug here: the new_menv (with the shadows) was passed to
+	expand_vars, so that all the variables were hiding same-named
+	symbol macros from all their initforms.
+
+2014-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (delay_s): Global variable removed.
+	(eval_init): Initialiation of delay_s removed.
+	Symbol now interned in reg_mac call for registering me_delay .
+
+	* genvim.txr: Updated to recognize a reg_mac call
+	with intern.
+
+2014-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Improved documentation for the dwim operator.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 82
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date, improved the documentation
+	for the copy function and copy-list, and fixed the
+	an instance where the delay macro was called a function.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim: Updated.
+
+2014-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Typos, grammar and formatting fixes mailed in
+	by Roman Mishin.
+
+2014-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Regression: valid floating-point literals tagged
+	as having trailing junk. The fix is to put the junk-matching rule after
+	the valid rules.
+
+2014-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (copy): New function.
+
+	* lib.h (copy): Declared.
+
+	* eval.c (eval_init): Registered copy function as intrinsic.
+
+	* txr.1: Added missing documentation for length. Documented copy.
+
+2014-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Updated with regard to how operators are registered in
+	in eval_init. Also, scans reg_mac registrations now.
+
+	* txr.vim: Refreshed. The previously missed "delay" operator is now
+	listed, thanks to reg_mac.
+
+2014-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (maybe_progn): New function.
+	(expand_macrolet, expand_symacrolet): Use maybe_progn
+	to eliminate unnecessary progn wrapping.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (gun_s): New global variable.
+	(me_gun): New static function.
+	(eval_init): New gun symbol interened, me_gun registered
+	as intrinsic macro.
+
+	* txr.1: Documented gun.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Converting expander special case code transformations into
+	formal macros that are in the top_mb table, make their symbols
+	fboundp and can be expanded with macroexpand.
+
+	* eval.c (mefun_t): New typedef name.
+	(expand_macro): If the expander is a cobj, then pull out the C function
+	and call it, otherwise realize the interpreted macro as before.
+	(me_gen, me_delay): New static functions, replace expand_gen
+	and expand_delay.
+	(expand_qquote): Renamed to me_quote.
+	(expand_gen, expand_delay): Renamed to me_gen and me_delay,
+	with an interface adjustment and moved.
+	(expand_op): Renamed to me_op.
+	(expand): Removed qquote, gen, delay, op, and do handling, since
+	these operators are now macros.
+	Removed the unnecessary expansion of with-saved-vars.
+	(reg_op, reg_fun): Assert that the symbol is not nil, to catch
+	initialization order issues.  One just showed up: op_do was
+	interned in match.c, which is initialized later.
+	(reg_mac): New static function
+	(eval_init): Intern do_s, because match.c hasn't done it yet
+	at this point. Register me_gen, me_delay, me_op (twice) and me_qquote
+	as intrinsic macros.
+
+	* txr.1: Documented those operators as macros.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (reg_op): New static function.
+	(eval_init): Register operators with reg_op instead of direct sethash
+	calls.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (make_like): If the first element of list isn't
+	a character, then don't try to make it into a string;
+	keep it as a list. This allows [mapcar list "abc" "def"]
+	to work intuitively rather than blow up.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (lit_s): New symbol.
+	(code2type): Return lit_s for LIT type.
+	(typeof): Return lit_s for TAG_LIT.
+	(replace_str): Error message wording.
+	(obj_init): lit_s interned.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (do_eval): Set last_form_evaled just before
+	dispatching function, so it is not clobbered by argument evaluations.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_op): Use rlcp_tree when constructing the
+	dwim_body, since the append2 copies list structure.
+
+	* parser.y (n_exprs): propagate source loc info from both 
+	constituents, giving precedence to the left one, rather than just taking
+	it from the left one and ignoring the second constituent.  This fixes
+	cases of missing location info. The left constituent n_expr is often 
+	a symbol, and those do not have location info. We want a case like
+	like ((x) y) to take from (x), and (x (y)) to take it from (y),
+	and so on.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (list): For @n_expr, get the source location info
+	from the @ token.
+	(n_expr): Bugfix: do not attribute a symbol with location info.
+	(quasilit): Obtain location info from quasi_items, and only
+	if that is unavailable, then from lineno.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 81
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim: Updated.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (regex_parse, lisp_parse): Better formatting
+	for the context string that serves in place of a filename.
+
+2014-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_place): Unnecessary, buggy function removed.
+	It was handling silly special cases with the net effect of being
+	nearly equivalent to just expand, while failing to expand places
+	which are compound macro calls. It did diagnose nonexistent place
+	types at expansion time, which isn't worth much.
+	(expand): All the expansions for the mutating operator sset, inc, dec,
+	push, pop and flip were also pointless and have been removed.  they did
+	the precise equivalent of doing expand(rest(form)), and consing the
+	symbol to the front, which is the fallback case for function call
+	forms.
+
+2014-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Make it an error to have implicit function declarations by
+	means of -Werror=implicit-function-declarations.  Fix broken mkdir and
+	mknod tests. Regenerate config.make if we add -U__STRICT_ANSI__
+	to the compiler options, so that later tests benefit from this.
+	Regenerate config.make right away if adding -D_DARWIN_C_SOURCE.
+	This allows the makedev test to pass.
+
+	* stream.c: Include <sys/types.h> for makedev.
+	(mknod_wrap): Don't rely on makedev wrappers to be there; test.
+
+2014-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (spec): Bugfix: SECRET_ESCAPE_E should use n_expr
+	not expr. expr is subject to expand_meta.
+	(n_expr): Do not associate source info with character
+	literals.
+	(expand_meta): Bugfix: when walking forms in a collecting loop,
+	propagate the source info to them. Bugfix: attach source
+	info to var and expr expansions.
+	(rl): Rewritten in terms of rlset.
+	(rlset): Only set source info for an object that doesn't already
+	have it.
+
+2014-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_init): Revert qquote, unquote and splice
+	to the system namespace, for hygiene.
+
+	* txr.1: Updated.
+
+2014-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): HAVE_MAKEDEV not HAVE_MKDEV.
+
+2014-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (getcwd_wrap): Implement correct test of getcwd's
+	return value.
+
+2014-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Use -Werror= on the missing prototypes and
+	strict prototypes warnings; these should be errors.
+
+2014-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Added feature tests for makedev, link/symlink/readlink,
+	mkdir and mknod.
+
+	* eval.c (eval_init): Wrap #ifdefs around the registrations of
+	the wrappers for these functions.
+
+	* stream.c (mkdir_wrap): Wrap in #ifdef HAVE_MKDIR, and
+	provide a Windows version if HAVE_MKDIR is missing, but
+	HAVE_WINDOWS_H is true.
+	(makedev_wrap, major_wrap, minor_wrap): Wrap with #if HAVE_MAKEDEV.
+	(mknod): Use #if HAVE_MKNOD.
+	(symlink_wrap, link_wrap, readlink_wrap): Wrap with #if HAVE_SYMLINK.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (debug): Fix 2013-12-02 regression, which leaves the
+	debugger not printing the current line of data.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Intern symlink_wrap, link_wrap, readlink_wrap.
+
+	* stream.c (symlink_wrap, link_wrap, readlink_wrap): New functions.
+
+	* stream.h (symlink_wrap, link_wrap, readlink_wrap): Declared.
+
+	* txr.1: Documented.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register forgotten s_ifsock variable.
+	Register mkdir_wrap, chdir_wrap, getcwd_wrap, makedev_wrap, minor_wrap,
+	major_wrap and mknod_wrap.
+
+	* stream.c (mkdir_wrap, chdir_wrap, getcwd_wrap, makedev_wrap,
+	minor_wrap, major_wrap, mknod_wrap): New functions.
+	(stream_init): Initialize forgotten variable s-ifsock.
+
+	* stream.h (s_ifsock): Declared.
+	(mkdir_wrap, chdir_wrap, getcwd_wrap, makedev_wrap,
+	minor_wrap, major_wrap, mknod_wrap): Declared.
+
+	* txr.1: Forgotten documentation for remove-path and rename-path
+	added. Forgotten mention of s-ifsock. Documented new Unix functions.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Support octal and binary numbers.
+
+	* txr.1: Documented.
+
+	* genvim.txr, txr.vim: Updated.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (modifiers): Bugfix: list element not subject to expansion
+	of Lisp forms denoted by @.
+	(expand_meta): Bugfix: failure to expand vars, which can be
+	symbol macros now.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_print, obj_pprint): Render quasi-quote hash and
+	vector literals using their original notation.
+
+	* parser.y (unquotes_occur): Takes new argument, level. 
+	Only finds quotes which are at the given quasiquoting level.
+	Finally, this is the right semantics. In the first version of this
+	function, we were not eager enough: we neglected to find unquotes
+	that were wrapped in nested quasiquotes. Then we were too eager:
+	finding any unquotes, even ones belonging to the inner backquotes.
+	(vector, hash, choose_quote): Pass zero to unquotes_occur function.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_qquote): Bugfix. Was not handling an unquote
+	in the dotted position: (qquote x1 .. xn . (unquote form)),
+	which looks like the structure (qquote x1 .. xn unquote form).
+	Fixed by a hack: after recursively expanding the (unquote form)
+	part (rest of the form), we check whether the unexpanded
+	version has unquote at the front. If so, we know the expansion is just
+	form, and use it to emit the suitable expansion.
+
+2014-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Symbol macros.
+
+	* eval.c (top_smb, defsymacro_s, symacrolet_s): New global variables.
+	(lookup_symac, get_opt_param_syms, get_param_syms, op_defsymacro,
+	expand_symacrolet, make_var_shadowing_env): New static functions.
+	(expand_tree_cases, expand_catch_clause): Install shadowing environment
+	so lexical bindings hide any symbol macrolets.
+	(expand_place): Fix neglect to expand an atomic form, which breaks
+	symbol macros used as places.
+	(expand): Expand symbol macros, expand symacrolet binding forms.
+	Make sure symbol macros are shadowed in the lexical binding
+	constructs. Take advantage of return value of rlcp_tree in a
+	few places.
+	(macro_form_p): Support for symbol macros; bugfix: not handling
+	default argument.
+	(macroexpand_1): Streamlined, and support added for symbol macros.
+	(eval_init): Protect top_smb from gc. Create new hash, stored in
+	top_smb. Initialize defsymacro_s and symacrolet_s.
+	Register op_defsymacro.
+
+	* parser.y (rlcp_tree): Return the to form instead of useless t and nil.
+
+	* txr.1: Documented.
+
+2014-02-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Document quasiquote operator syntax.
+
+2014-02-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (env_fbind, env_vbind): Use acons_new_c, and provide
+	a much more useful return value: the binding cell itself,
+	rather than the symbol.
+	(bind_args): Bugfix: env_vbind was still being called in one case,
+	leading to a neglect to bind a special variable properly.
+	(bindings_helper): Changed interface. Bugfix: in sequential binding,
+	actually bind the successive environments so closures will behave
+	100% correctly. Returns a list of the actual bindings, in which
+	special variables are not distinguished in any way.
+	(op_let, op_for): Conform to new bindings_helper interface. Use the
+	lexical environment that it returns instead of making a new one.
+	(op_each): Use the environment and list of bindings out of
+	bindings_helper. The bindings are used for stepping the lists,
+	and that includes stepping any special vars. The lexical environment
+	is used for evaluating the body. Thus, we need no special processing
+	for special vars here any more.
+
+2014-02-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bindings_helper): This must now bind dynamic values
+	rather than just assign to them. Got rid of the superfluous variable
+	saving array. Fixed the problem in recognizing the special_s symbol (it
+	is bindable).
+	(op_with_saved_vars): This simplifies, since it no longer needs
+	to save individual variables in an array, only to set up and
+	tear down a new dynamic environment frame.
+	(expand_vars): No longer returns two values with a cons. 
+	Takes a form argument for error reporting and a pointer to a boolean
+	just to report whether there are special vars without listing them.
+	(expand_save_specials): The with-saved-specials form doesn't need
+	a var list any more, so the expander is updated not to stick them in.
+	(expand): Update calls to expand_vars to new interface.
+
+2014-02-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (get_string_from_stream): Bugfix: do not abort if
+	stream is not a string stream, but throw a proper error exception.
+
+2014-02-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Get special variable overriding working in function and macro
+	parameter lists.
+
+	There is a bugfix here too (see eval_init below).
+
+	* eval.c (special_s): New global variable. This symbol is used
+	as a marker in parameter lists denoting expander-generating
+	syntax that gives information about specials.
+	(lookup_var, looup_var_l): Bugfix: walk the dynamic chain properly.
+	Fallback from the lexical chain to the dynamic.
+	(env_vbind_special): New static function.
+	(bind_args, bind_macro_params):  Detect special list in params. Use
+	env_vbind_special to bind variables either in the dynamic environment
+	or the lexical one.
+	(expand_opt_params, expand_params): Renamed to expand_opt_params_rec
+	and expand_params_rec, respectively. Now take extra argument for
+	accumulating list of special variables found in the param list.
+	(expand_params): New static function.
+	(set_dyn_env): New static function.
+	(interp_fun, expand_macro): Set up and tear down new dynamic
+	environment around parameter list evaluation and body evaluation. This
+	will take any new dynamic bindings.
+	(bindings_helper, op_each): The special_s symbol is now used instead of
+	colon_k for marking specials.
+	(op_defun): Recognize the specials added to the parameter list
+	so as not to t report that as not a bindable symbol.
+	(op_catch): Set up an tear down new dynamic environment around
+	the evaluation of the catch clause param binding and body.
+	(expand_vars): use colon_s symbol instead of colon_k for marking
+	special var.
+	(eval_init): Bugfix: gc-protect recently added dyn_env variable.
+	Intern special symbol into special_s variable.
+
+2014-02-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Introducing some changes for improved handling of special variables.
+	Saving and restoring of individual variables is very silly
+	and it's making it difficult to implement function parameters
+	that are rebindings of special variables.
+
+	Let's have a global pointer to a dynamic environment called dyn_env.
+	Let's make it part of the extended_jmp_buf structure, so that it's
+	implicitly saved and restored across exception handling.
+
+	Special variable lookups go through the dyn_env chain, and fall back on
+	the global bindings.
+
+	To override some specials, we just push a new dynamic environment and
+	stick them there. (As a bonus, the bindings can even be repeated in the
+	lexical environment (i.e. the same objects), so they can be found
+	faster. We have to make sure we remove that environment when we
+	leave the scope in the normal way. If we unwind out, it is done
+	automatically by extended_longjmp mechanism.
+
+	* eval.c (dyn_env): New global variable.
+	(lookup_var, lookup_var_l): If env is nil, look in the dyn_env
+	first, and only if that fails, look in the global bindings top_vb.
+
+	* signal.h (extended_jmp_buf): New member, de, for saving/restoring
+	dyn_env. This structure is now used whether or not we have signals.
+	(extended_setjmp, extended_longjmp): Updated to save and restore
+	dyn_env, and to do it regardless of whether there is POSIX signal
+	support.
+	(dyn_env): Declared here.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (symbol_function): Retrieve the global macro binding if the
+	function lookup fails, and if that fails, retrieve the special
+	operator binding.
+	(fboundp): Report t if there is a global macro binding.
+
+	* txr.1: Use "global" rather than "toplevel". Added note that
+	the fun operator doesn't see macro bindings. Documented that
+	symbol-function and fboundp see global macro bindings,
+	and that symbol-function can retrieve a special operator binding.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (prinl, pprinl): New functions.
+	(eval_init): Registered as intrinsics.
+
+	* txr.1: Documented.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_init): changing the quote, qquote, unquote
+	and splice symbols to be in the regular user package,
+	rather than the system package.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Allow the (. expr) syntax to denote expr.
+
+	* eval.h: Declare existing lambda_s extern variable.
+
+	* lib.c (obj_print, obj_pprint): print (lambda sym ...)
+	as (lambda (. sym) ...) and (lambda sym) as (lambda (. sym)).
+
+	* txr.1: document it.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implemented macrolet.
+
+	* eval.c (macrolet_s): New variable.
+	(lookup_mac, expand_macrolet): New static functions.
+	(expand): Recognize and expand macrolet form.
+	use lookup_mac to resolve macros rather than gethash,
+	since we have lexical macros now.
+	(eval_init): Intern macrolet symbol.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_macro_params, expand_macro, macroexpand_1, macroexpand):
+	Rename mac_env variable to menv for consistency.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Preparation for lexical macros: we need to pass a macro
+	environment down through the expander call hierarchy.
+
+	* eval.c (expand_opt_params, expand_params, expand_tree_cases,
+	expand_tree_case, expand_forms, val expand_cond_pairs, val
+	expand_place, expand_qquote, expand_vars, expand_quasi, expand_op,
+	expand_catch_clause, expand_catch, expand): All expanders get new
+	parameter, menv. expand_forms and expand handle a nil value of menv.
+	(eval_intrinsic): Pass nil macro environment to expand.
+	(eval_init): Update intrinsic registration for expand.
+
+	* eval.h (expand, expand_forms): Declarations updated.
+
+	* parser.y (expand_meta): Gets macro env parameter.
+	(elem, o_elem, exprs, expr): Pass nil to expand_forms and expand_meta.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Replacing uses of the eq function which are used only as C booleans,
+	with just using the == operator. 
+
+	Removing cobj_equal_op since it's indistinguishable from eq.
+
+	Streamlining missingp and null_or_missing_p.
+
+	* eval.c (transform_op): eq to ==.
+	(c_var_ops): cobj_equal_op to eq.
+
+	* filter.c (trie_compress, trie_lookup_feed_char, filter_string_tree,
+	html_hex_continue, html_dec_continue): eq to ==.
+
+	* hash.c (hash_iter_ops): cobj_equal to eq.
+
+	* lib.c (countq, getplist, getplist_f, search_str_tree,
+	posq): eq to ==.
+	(cobj_equal_op): Function removed.
+
+	* lib.h (cobj_equal_op): Declaration removed.
+	(missingp): Becomes a simple macro that yields a C boolean instead
+	of t/nil val, because it's only used that way.
+	(null_or_missing_p): Becomes inline function returning int.
+
+	* match.c (v_output): eq to ==.
+
+	* rand.c (random_state_ops): cobj_equal_op to eq.
+
+	* regex.c (char_set_obj_ops, regex_obj_ops): cobj_equal_op to eq.
+	(reg_derivative): Silly if3 expression replaced by null.
+	(regexp): Redundant if2 expression wrapped around eq removed.
+
+	* stream.c (null_ops, stdio_ops, tail_ops, pipe_ops, string_in_ops,
+	byte_in_ops, string_out_ops, strlist_out_ops, dir_ops,
+	cat_stream_ops): cobj_equal_op to eq.
+
+	* syslog.c (syslog_strm_ops): cobj_equal_op to eq.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	The C function nullp is being renamed to null, and the rarely
+	used global variable null which holds a symbol becomes null_s.
+
+	A new macro called nilp is added that more efficiently checks whether
+	an object is nil, producing a C boolean value rather than t or nil.
+
+	Most of the uses of nullp in the codebase just become the more
+	streamlined nilp.
+
+	* debug.c (show_bindings): nullp to nilp
+
+	* eval.c (lookup_var, lookup_var_l, lookup_fun, lookup_sym_lisp1,
+	do_eval, expand_qquote, expand_quasi, expand_op): nullp to nilp.
+	(op_modplace): nullp to null.
+	(eval_init): Update registration of null and not from C function
+	nullp to null.
+
+	* filter.c (trie_compress, html_hex_continue): nullp to nil.
+	(filter_string_tree): null to null_s.
+
+	* hash.c (hash_next): nullp to nilp.
+
+	* lib.c (null): Variable renamed to null_s.
+	(code2type): null to null_s.
+	(lazy_flatten_scan, chainv, lazy_str, lazy_str_force_upto,
+	obj_print, obj_pprint):
+	nullp to nilp.
+	(obj_init): null to null_s; nullp to null.
+
+	* lib.h (null): declaration changed to null_s.
+	(nullp): Inline function renamed to null.
+	(nilp): New macro.
+
+	* match.c (do_match_line): nullp to nilp.
+
+	* rand.c (make_random_state): Likewise.
+
+	* regex.c (compile_regex): Likewise.
+
+2014-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Bugfix, I think. :) We do not need to call the expander
+	for a Lisp expression in a quasistring, and doing so leads to a
+	potentially incorrect double expansion because the whole thing
+	will be expanded again, either by the TXR Lisp quasi operator's
+	expander (if this is a quasiliteral in Lisp) or in the TXR
+	pattern language, by expand_meta, which hunts down down @ expressions
+	and expands them. 
+
+2014-02-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing special variables with local overriding.
+	All predefined globals become special.
+
+	* eval.c (special, with_saved_vars_s): New global variables.
+	(mark_special, special_p): New functions.
+	(bindings_helper): Takes new argument, include_specials.
+	Now processes the special colon syntax for denoting special variables,
+	setting up their values, taking care to observe whether the
+	binding is parallel or sequential.
+	(op_let, op_for): Pass new argument to bindings_helper.
+	(op_each): Pass new argument to bindings_helper with a value of it,
+	and deal with the colon annotations that emerge in the bindings.
+	(op_defvar, regvar): Mark symbol as special.
+	(op_with_saved_vars): New static function.
+	(expand_vars): Takes new argument, returns a cons. Detects special
+	variables among the vars and produces the colon syntax.
+	(expand_catch_clause): Bugfix: this was using expand_vars on
+	a parameter list. Now properly uses expand_params.
+	(expand_save_specials): New static function.
+	(expand): For the operators that are binding constructs, handle
+	the new form of expand_vars which returns information about
+	special variables. If specials occur, then generate the 
+	with-saved-vars form around the expansion which will save and restore
+	their values. The expansion of vars done by expand_vars, together
+	with the run-time actions of bindings_helper, do the rest.
+	Speaking of which, the new with-saved-vars operator form is now
+	expanded here too.
+	(eval_init): Protect new variables special and with_saved_vars_s.
+	Initialize special with new hash table. Store new interned
+	symbol in with_saved_vars_s. Register op_with_save_vars in op_table.
+
+	* txr.1: Documented specials.
+
+2014-02-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (subst_vars): Change throwing of query_error_s
+	to eval_error call. This is a leftover from when this was cloned
+	from its counterpart in match.c. However, I can't think of a way
+	this call can ever be reached.
+
+2014-02-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (macro_form_p, macroexpand_1, macroexpand): New static
+	functions.
+	(eval_init): Registered new functions.
+
+	* txr.1: Documented.
+
+2014-02-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (unquotes_occur): Bugfix: we should not terminate
+	the recursion early if we see a quote. This would be true if
+	the only quotes were those generated by the parser based on
+	calls to choose_quote. However, it breaks for something
+	like an explicitly coded '(sys:quote ,form), which becomes
+	(sys:quote (sys:quote ,form)), leaving a dangling unquote.
+
+2014-02-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/faster-square-root (mp_sqrt): Bugfix: was computing square
+	roots that were incorrect in the last digit/bit, because it was not
+	generating the guess mask all the way down to bit zero. Also, added
+	an early test to bail the loop when an the guess at the root happens
+	to be right.
+
+	* mpi-patches/add-bitops: Refreshed.
+
+	* mpi-patches/fix-ctype-warnings: Likewise.
+
+	* mpi-patches/mpi-to-double: Likewise.
+
+2014-02-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing a long-running issue in the TXR pattern language: premature
+	opening of files, prior to directives that actually need data.
+	The documentation basically lied that this is the case: namely,
+	the text "A file isn't opened until the query demands material from
+	that file, and then the contents are read on demand, not all at
+	once."   This is now a fact.
+
+	* match.c (non_matching_directive_table): New global variable.
+	(open_data_source): New static function. Contains an almost
+	verbatim migration of the source-opening logic that used
+	to be in match_files. The useless assignment to c->nil is gone,
+	and c->data == t is explicitly tested for. Instead of assuming
+	that only the @(next) directive does not need to have a data source
+	open, the table of non-matching directives is consulted. Opening
+	the data source is now skipped for numerous directives.
+	(match_files): Call open_data_source within the loop. This
+	means that even after processing numerous non-matching directives,
+	we will still correctly set up the data lazy list.
+	(dir_tables_init): Initialize non_matching_directive_table,
+	protect from GC and populate with numerous directives.
+
+	* txr.1: Improved documentation for @(next :args), and removed
+	a description of the hack that a single @(next) at the top of the
+	query suppressed the opening of the data source.
+
+2014-02-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (env_hash): new function.
+	(eval_init): Register env and env_hash functions.  Register prog_args
+	and prog_args_full as *args* and *full-args*.
+
+	* lib.c (timegm_hack): Invalidate env_list, after mucking with
+	the environment via setenv and unsetenv.
+
+	* txr.c (prog_args_full, prog_args): New global variables.
+	(txr_main): Command-line processing converted to use TXR's
+	library. Populates prog_args_full and prog_args.
+
+	* txr.h (prog_args_full, prog_args): Declared.
+
+	* txr.1: Documented *args*, *full-args*, env and env-hash.
+
+2014-02-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	The mode argument in some stream-opening functions becomes optional.
+
+	* eval.c (eval_init): Change registration for open_file, open_tail
+	and open_command.
+
+	* stream.c (open_file, open_tail, open_command): mode_str argument
+	defaulted.
+
+	* txr.1: Updated.
+
+2014-02-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (open_tail): Fix 2013-12-02 regression:
+	seek_to_end_p argument being ignored, with the
+	behavior being no initial seek to the end.
+
+	* txr.1: Clarified the behavior of the seek-to-end-p
+	option.
+
+2014-02-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* combi.c (rperm_gen_full): Update ptail with return value
+	of list_collect. This is not necessary for correctness, but it spares
+	list_collect from having to search for the tail on each call.
+
+2014-02-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 80
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim, dep.mk: Updated.
+
+2014-02-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_args, op_defvar, op_defun, op_defmacro, op_modplace):
+	Fix sybol misspelling.
+
+2014-02-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register gensym function as the gensym
+	intrinsic, rather than gensymv.
+	Register gensym_counter as *gensym-counter*.
+
+	* lib.c (gensym): Handle missing prefix argument by defaulting
+	the prefix to "g".
+	(gensymv): Function removed.
+
+	* lib.h (gensymv): Declaration removed.
+
+	* txr.1: Fixed omission: missing documentation for gensym.
+	Documented *gensym-counter*.
+
+2014-02-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand): Bugfix: do not expand any part of the macro
+	form via expand_forms. This is completely wrong since only the
+	macro knows what material is evaluated and what isn't.
+
+2014-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_tree_case): Removed superfluous handling of
+	nil parameter list; this is correctly handled by bind_macro_params.
+	Added support for the colon symbol as an indication that
+	the case is declined.
+
+	* txr.1: Updated.
+
+2014-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	New destructuring operators.
+
+	* eval.c (tree_case_s, tree_bind_s): New symbol variables.
+	(bind_macro_params): Bugfix: inappropriate exception thrown when atom
+	matched against parameter list. Bugfix: nil being returned when
+	atom matches empty parameter list. Added support for a new convention:
+	if loose_p is the colon keyword, then exceptions are not thrown
+	for destructuring mismatches; nil is returned instad.
+	(op_tree_case, expand_tree_cases, expand_tree_case, op_tree_bind):
+	New static functions.
+	(expand): Handle tree_case_s and tree_bind_s.
+	(eval_init): Intern tree-case and tree-bind symbols.
+	Register the corresponding operator functions op_tree_case and
+	op_tree_bind under these symbols in op_table.
+
+	* txr.1: Documented tree-case and tree-bind operators.
+
+2014-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_macro_params): Bugfix: enforce mismatch on
+	superfluous material.
+
+2014-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	In the spirit of the previous hack, here is another hack to
+	alleviate a long-standing pain: when an exception happens in
+	TXR's library somewhere, the program dies without leaving
+	a clue about what code was being evaluated when that happened.
+	What we can do is have the evaluator publish the most recent
+	compound form it has processed by stashing it in a variable.
+	Then when an unhandled exception occurs, we can peek at that
+	and try to pull out source location info.
+
+	* eval.c (last_form_evaled): New variable.
+	(do_eval): When evaluating a compound form, stash it in
+	last_form_evaled.
+	(eval_init): Protect last_form_evaled from gc.
+
+	* eval.h (last_form_evaled): Declared.
+	(eval_error_s): Existing variable declared.
+
+	* unwind.c: Has to include "eval.h" for the above variable
+	and "parser.h" for the source_loc function.
+	(uw_throw): When an exception is unhandled, if 
+	last_form_evaled has source info, add it to the diagnostic.
+	But not if the exception is eval-error; because errors from
+	the evaluators already have the info.
+
+2014-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Nice idea: how about a function which walks the tree structure and
+	back-fills some missing source code location info.  We apply this to
+	macro expansions.  If some error occurs in expanded code, this way it
+	is referenced to the line where the macro *call* occurs.
+	Not only is this better than nothing, it may be better than tracing
+	it to the macro definition. Ideally, we would have both places:
+	("the error is in the code expanded from this macro, at this site").
+
+	* eval.c (expand): Use rlcp_tree to back-fill source info in
+	macro expansion by taking it from the unexpanded form.
+
+	* parser.h (rlcp_tree): Declared.
+
+	* parser.y (rlcp_tree): New function.
+
+2014-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfixes: not propagating source loc info in quasiliterals.
+
+	* eval.c (expand_quasi): Add some rlcp's here.
+
+	* parser.y (o_var, quasi_items, o_elems_transform): Likewise.
+
+2014-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand): Replace blatant tail calls with
+	a backwards goto.
+
+2014-02-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_macro_params): Bugfix: the :whole parameter must
+	capture the entire form, not just the arguments.
+	(expand): Apply rlcp to the result of macro expansion, if it has
+	not set up source code location.
+	(eval_init): Register rlcp as intrinsic.
+
+	* txr.1: Start of macro documentation. Documented rlcp.
+
+2014-02-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	First cut at implementation of macros.
+
+	* eval.c (top_mb, defmacro_s, macro_time_s, whole_k, env_k): New global
+	variables.
+	(expand_params): Recurse to handle macro parameter lists too.
+	(bind_macro_params, op_defmacro, expand_macro): New static functions.
+	(expand): Evaluate defmacro forms and macro-time forms at expansion
+	time. Recognize and expand macros (albeit not yet with proper lexical
+	scoping: local bindings are not able to shadow a macro).
+	(eval_init): Protect top_mb from GC and initialize it.
+	Intern new symbols defmacro, macro-time, and :whole.
+	Register defmacro operator in op_table.
+
+	* match.h (env_k): Added declaration for existing external variable.
+
+2014-02-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: parameters of defun were not being treated by expander.
+	They need to be since they can contain evaluable initforms for default
+	arguments. Ditto with lambda; lambda parameters were being treated
+	using expand_vars, which is not appropriate.
+
+	* eval.c (expand_opt_params, expand_params): New static functions.
+	(expand_vars): Bugfix: added some missing rlcp's to propagate
+	line number info.
+	(expand): Move lambda to separate case, and expand its params
+
+2014-02-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_args, op_modplace): Use ~s consistently
+	in error messages.
+
+2014-02-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bindings_helper): Fixed misspelling of "symbol" in exception
+	message.
+
+2014-02-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	A trivial change in the UTF-8 decoder allows TXR to handle null bytes
+	in text.
+
+	* utf8.h (UTF8_ADMIT_NUL): New preprocessor symbol.
+	(utf8_decoder): New member, flags.
+
+	* utf8.c (utf8_decoder_init): Initialize flags to 0.
+	(utf8_decode): If a null byte is encountered in the input,
+	then convert it to 0xDC00, rather than keeping it as zero,
+	unless flags contains UTF8_ADMIT_NUL.
+
+	* txr.1: Document handling of null bytes.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_update): Avoid double cdr.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (inhash): Simplify with gethash_c.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	Replacing acons_new_l and aconsq_new_l interfaces with ones
+	that return the new or old cons cell rather than a pointer
+	to its cdr field.
+
+	* eval.c (transform_op): use of acons_new_l replaced with
+	acons_new_c.
+
+	* hash.c (struct hash): acons_new_l_fun member replaced
+	with acons_new_c_fun.
+	(make_hash, make_similar_hash): initialize acons_new_l_fun
+	member using either acons_new_c or aconsql_new_c.
+	(gethash_l): function becomes an inline in hash.h.
+	(gethash_c): new function, based on gethash_l.
+	(inhash, gethash_n): updated w.r.t struct hash change.
+
+	* hash.h (gethash_c): declared.
+	(gethash_l): becomes an inline wrapper for gethash_c.
+
+	* lib.c (acons_new_l, aconsql_new_l): functions removed.
+	(acons_new_c, aconsql_new_c): new functions.
+	(obj_init): use gethash_c and rplacd instead of gethash_l
+	and set.
+
+	* lib.h (acons_new_l, aconsql_new_l): declarations removed.
+	(acons_new_c, aconsql_new_c): declared.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (inhash): Simplify code with gethash_f.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Registered hash_update_1 as intrinsic.
+
+	* hash.c (hash_update_1): New function.
+
+	* hash.h (hash_update_1): Declared.
+
+	* txr.1: Documented hash-update-1.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (inhash): Rename local variable from new to new_p.
+	This is consistent with usage elsewhere in the module,
+	and more importantly, keeps our code C++.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (class_check): Bugfix: the function was assuming that
+	the argument is a pointer type object, leading to a crash
+	if given a fixnum integer or string literal.
+
+2014-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register inhash as intrinsic.
+
+	* hash.c (inhash): New function.
+
+	* hash.h (inhash): Declared.
+
+	* txr.1: Documented inhash. Also, added surprisingly missing
+	documentation for gethash!
+
+2014-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Different approach: optional arguments on hash-isec and hash-uni allow
+	for more flexible joining of data from the hash tables.
+
+	* eval.c (eval_init): Remove hash_guni and hash_gisec. Change
+	registration for hash_uni and hash_isec to three arguments with
+	one optional.
+
+	* hash.c (hash_uni): Third parameter introduced, join_func.
+	The default behavior changes: in the two argument case,
+	clashing keys prefer the value from hash1 rather than hash2.
+	For this reason, we now iterate over hash2 first, then hash1.
+	(hash_guni): Removed.
+	(hash_isec): Third parameter introduced, join_func.
+	(hash_gisec): Removed.
+
+	* hash.h (hash_uni, hash_isec): Declarations updated.
+	(hash_guni, hash_gisec): Delarations removed.
+
+	* txr.1: Documentation updated.
+
+2014-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register hash_guni and hash_gisec as intrinsics.
+
+	* hash.c (hash_guni, hash_gisec): New functions.
+	(hash_isec): Bugfix: since gethash was naively used, keys in hash2
+	associated with the value nil were erroneously omitted from the
+	intersection.
+
+	* hash.h (hash_guni, hash_gisec): Declared.
+
+	* txr.1: Documented new functions.
+
+2014-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Disallow syntax like 1.0a, flagging it as
+	an invalid floating-point token.  The problem is that 1a is allowed,
+	for compatibility with other Lisp dialects (it is a symbol) whereas
+	1.0a was scanning as 1.0 followed by a, which is inconsistent.
+	Some Lisp dialects embedded dots in symbols, and allow 1.0a
+	as a symbol token. We don't.
+
+2014-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (struct hash): New member, equal_fun.
+	(hash_equal_op): Short circuited logic: whenever we pull
+	identical cells from either hash, we don't have to go
+	through the pending lookaside list.
+	(make_hash, make_similar_hash): Initialize new structure member.
+
+2014-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_equal_op, hash_hash_op): New static functions.
+	(hash_ops): New functions registered in table of operations.
+
+	* txr.1: Documentation for equal function updated to explain
+	how two hashes are equal.
+
+2014-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Undoing bogus optimization, which can only work when objects
+	are treated as immutable.
+
+	* hash.c (last_equal_key, last_equal_hash): Variables removed.
+	(equal_hash, hash_process_weak): All references to removed
+	variables scrubbed.
+
+2014-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (some_satisfy, all_satisfy, none_satisfy): Fix coding
+	mistake from two commits ago leading to a regression.
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register new functions posqual, posql,
+	posq, pos, and pos_if as intrinsics.
+
+	* lib.c (posqual, posql, posq, pos, pos_if): New functions.
+
+	* lib.h (posqual, posql, posq, pos, pos_if): Declared.
+
+	* txr.1: Documented
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Turn a require argument into an optional
+	one for the functions some, all and none.
+
+	* lib.c (some_satisfy, all_satisfy, none_satisfy): Add defaulting
+	behavior for pred parameter.
+
+	* txr.1: Document that the predicate function is optional
+	in calls to some, all and none.
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 79
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (if_fun): Bugfix: forgotten handling of optional
+	alternative argument.
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (subst_vars): Bugfix: results of expressions not
+	treated in the same way as variables: lists not stringified,
+	causing expansions with parentheses, and sometimes errors
+	due to unhandled objects. Also, use tostringp instead of
+	format for stringifying objects.
+	stringifying object. Bugfix.k
+
+	* match.c (subst_vars): Added comment similar to the one in
+	the subst_vars of eval.c. Removed superfluous conversion code where the
+	str variable is already known to be a string.
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (apply): Fix regression in dwim operator: not handling
+	nil object properly. Since dwim now trivially delegates to apply,
+	apply must recognize nil.
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* combi.c (comb_hash_while_fun, comb_hash_gen_fun, comb_hash): New
+	static functions.
+	(comb): Support hash tables.
+
+	* hash.c (print_key_val): When values are nil, print in a more condensed
+	way by omitting the second element. This notation is accepted as 
+	input already by the parser.
+	(hash_insert_pair): New function.
+
+	* txr.1: Description of comb updated to indicate that it works over
+	hashes.
+
+2014-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c: Remove inclusion of unneeded headers: <limits.h>
+	and <dirent.h>.
+
+2014-02-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (OBJS): New object file, combi.o.
+
+	* dep.mk: Updated.
+
+	* eval.c: Removed combination and permutation functions; they
+	now reside in combi.c.
+	(generate): Changed from static to external linkage.
+
+	* eval.h (generate): Declared.
+
+	* combi.c: New file.
+
+	* combi.h: New file.
+
+	* txr.vim: Regenerated.
+
+2014-02-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rcomb_gen_fun_common): Streamlined implementation.
+	Got rid of stack that is consed up on each call.
+
+2014-02-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Relaxed behavior: don't throw errors for impossible permutations,
+	but return an empty list.
+
+	* eval.c (perm_init_common): Do not throw error; return a nil
+	state if permutation length exceeds sequence length.
+	(perm_vec, perm_list, perm_str): Check for null return from
+	perm_init_common and return empty list.
+	(k_conses): Do not throw error; return empty list.
+	(comb_list_gen_fun): Check for nil value out of k_conses.
+	(comb): For vectors and strings, check length against k and
+	return nil if necessary. For lists, comb_list_gen_fun handles it.
+
+	* txr.1: Section order rearranged, and updated.
+
+2014-02-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rcomb_while_fun, rcomb_gen_fun_common,
+	rcomb_list_gen_fun, rcomb_list, rcomb_vec_gen_fun, rcomb_vec,
+	rcomb_str_gen_fun, rcomb_str, rcomb): New static functions.
+	(eval_init): Register rcomb as intrinsic.
+
+	* txr.1: Documented rcomb.
+
+2014-02-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rperm, perm_str): Just in case, return a mutable empty
+	string, rather than null_string, which is a literal.
+	(k_conses, comb_while_fun, comb_gen_fun_common,
+	comb_list_gen_fun, comb_list, comb_vec_gen_fun, comb_vec,
+	comb_str_gen_fun, comb_str, comb): New static functions.
+	(eval_init): Registered comb as instrinsic.
+
+	* txr.1: Documented comb.
+
+2014-02-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rperm_list, rperm_vec, rperm_str): n variable renamed
+	to k, for consistency with rperm.
+	(rperm): Likewise, and the behavior in the k == zero case is
+	changed to return a single empty permutation.
+	(perm_while_fun, perm_index, perm_gen_fun_common, perm_init_common,
+	perm_vec_gen_fill, perm_vec_gen_fun, perm_vec, 
+	perm_list_gen_fill, perm_list_gen_fun, perm_list, 
+	perm_str_gen_fill, perm_str_gen_fun, perm_str, perm): New
+	static functions.
+	(eval_init): perm registered as intrinsic.
+
+	* lib.c (vecref_l): Bugfix: allow negative indices, just like vecref.
+
+	* lib.h (three, four): New macros.
+
+	* txr.1: Updated documentation for rperm. Documented perm.
+
+2014-02-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (vector, vec_set_length, cat_vec): When the vector size
+	overflows the size_t type that is passed to malloc, throw an exception.
+
+2014-02-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (nperm_while_fun, nperm_gen_fun, nperm_list,
+	nperm_vec_gen_fun, nperm_vec, nperm_str_gen_fun, nperm_str, nperm): New
+	static functions.
+	(eval_init): nperm registered as intrinsic.
+
+	* txr.1: Documented nperm function.
+
+2014-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 78
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim: Updated.
+
+2014-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (int_str): Regression: handle base argument properly.
+
+2014-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_grow, make_hash, make_similar_hash, copy_hash):
+	Pass second argument to vector.
+
+	* lib.c (vector): Takes additional argument specifying the value
+	for the slots of the vector.
+	(vector_list, sub_vec): Pass second argument to vector.
+
+	* lib.h (vector): Declaration updated.
+
+	* eval.c (eval_init): Register vector as two-argument function
+	with one required arg.
+	
+	* txr.1: Updated.
+
+2014-02-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_dwim): Gutted down to just a few lines.
+	Basically the dwim operator is just a Lisp-1 version of the call
+	operator now. It doesn't have to do anything funny with non-function
+	objects, since they are callable.
+
+	* lib.c (chr_str, chr_str_set, vecref, vecref_l): Replace
+	inappropriate internal assertions with error exceptions.
+
+	* unwind.h (numeric_assert, range_bug_unless): Unused macros
+	removed.
+
+2014-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (generic_funcall): If a cons cell is passed as
+	one argument to a sequence being used as a function, split it into two
+	arguments. This is consistent with the DWIM operator behavior.
+
+	* txr.1: Document callable objects.
+
+2014-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow sequences and hashes to be called as functions.
+	This is already supported in the DWIM operator.
+
+	* eval.c (apply): If object isn't a function, gather the
+	arguments into an array and delegate to generic_funcall.
+
+	* lib.c (generic_funcall): Changed from static to external linkage.
+	Supports sequences and hashes as functions. Error messages
+	fixed not to refer to "funcall".
+	(funcall, funcall1, funcall2, funcall3, funcall4): Do not throw
+	exception if fun is not of FUN type; instead, delegate
+	to generic_funcall. Error messages fixed not to refer to "funcall".
+
+	* lib.h (generic_function): Declared.
+
+2014-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (lognot): Conform to new scheme for defaulting optional args.
+
+	* eval.c (apply): Unconditionally use colon_k for missing optional
+	args, for intrinsic functions.
+	(eval_intrinsic, rangev, rangev_star, errno_wrap): Conform to new
+	scheme for defaulting optional args.
+	(reg_fun_mark): Function removed.
+	(eval_init): Switch reduce_left and reduce_right back to reg_fun
+	registration.
+
+	* hash.c (gethash_n): Conform to new scheme for defaulting optional
+	arguments.
+
+	* lib.c (sub_list, replace_list, remove_if, keep_if, remove_if_lazy,
+	keep_if_lazy, tree_find, count_if, some_satisfy, all_satisfy,
+	none_satisfy, search_str, match_str, match_str_tree, sub_str,
+	replace_str, cat_str, tok_str, intern, rehome_sym, sub_vec,
+	replace_vec, lazy_str, sort, multi_sort, find, find_if, set_diff,
+	obj_print, obj_pprint): Conform to new scheme for defaulting optional
+	arguments.
+	(func_f0, func_f1, func_f2, func_f3, func_f4, func_n0, func_n1,
+	func_n2, func_n3, func_n4, func_n5, func_n6, func_n7, func_f0v,
+	func_f1v, func_f2v, func_f3v, func_f4v, func_n0v, func_n1v,
+	func_n2v, func_n3v, func_n4v, func_n5v, func_n6v, func_n7v):
+	Remove references to removed mark_missing_args member of struct func.
+	(func_set_mark_missing): Function removed.
+	(generic_funcall): Unconditionally use colon_k for missing optional
+	args, for intrinsic functions.
+
+	* lib.h (struct func): mark_missing_args member removed.
+	(func_set_mark_missing): Declaration removed.
+	(default_arg, default_bool_arg): New inline functions.
+
+	* rand.c (random): Left argument is not optional.
+	(rnd): Conform to new scheme for defaulting optional arguments.
+
+	* regex.c (search_regex, match_regex): Conform to new scheme for
+	defaulting optional arguments.
+
+	* stream.c (unget_char, unget_byte, put_string, put_char, put_byte,
+	put_line): Conform to new scheme for defaulting optional arguments.
+
+	* syslog.c (openlog_wrap): Conform to new scheme for defaulting
+	optional arguments.
+
+	* txr.1: Remove the specification that nil is a sentinel value in
+	default arguments, where necessary. Use consistent syntax for
+	specifying variable parts in argument lists. A few errors and omissions
+	addressed.
+
+2014-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_args): Support optional parameters in the
+	form (sym initform present-p-sym).  Also, support the convention
+	that a value of : explicitly passed for an optional argument produces
+	the same behavior as if that argument value were missing.
+
+	* txr.1: Document new conventions.
+
+2014-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (apply): Pass missing optional arguments as colon_k.
+	to functions for which this is requested.
+	(reg_fun_mark): New static function.
+	(eval_init): Register reduce_left and reduce_right as requiring
+	marking for missing optionals.
+
+	* lib.c (func_set_mark_missing): New function.
+	(generic_funcall): Pass missing optional arguments as colon_k
+	to functions for which this is requested.
+	(reduce_left, reduce_right): Handle missing values of init and key.
+	(func_f0, func_f1, func_f2, func_f3, func_f4, func_n0, func_n1,
+	func_n2, func_n3, func_n4, func_n5, func_n6, func_n7, func_f0v,
+	func_f1v, func_f2v, func_f3v, func_f4v, func_n0v, func_n1v,
+	func_n2v, func_n3v, func_n4v, func_n5v, func_n6v, func_n7v):
+	Initialize new mark_missing_args member of struct func.
+
+	* lib.h (struct func): New bitfield member, mark_missing_args.
+	(func_set_mark_missing): Declared.
+	(missingp, null_or_missing_p): New inline functions.
+
+	* txr.1: Updated descriptions of reduce-left and reduce-right.
+
+2014-02-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (nullp): Function removed.
+
+	* lib.h (nullp): New inline function.
+	(eq): Removed useless parentheses: it's not a macro.
+
+2014-02-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_modplace): Fixing a few argument count mismatches
+	in format calls.
+
+2014-02-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Tighten up environment visibility semantics of default argument
+	init forms, while streamlining the implementation.
+
+	* eval.c (bind_args): Get rid of opt_init_parm array hack;
+	turns out we already have a useful function for extending an
+	environment object, namely env_vbind: hitherto unused!  We now make a
+	blank environment upfront and extend it destructively with env_vbind.
+	Except that after evaluating an init form, we create a new environment:
+	this is in case a lexical closure was made by the init form, in which
+	event we don't want to be destructively manipulating the environment
+	any more.
+
+	* txr.1: Clarified.
+
+2014-02-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Fix incorrect registration of
+	list_star_intrinsic, diagnosed by compiler.
+
+2014-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding list* since we get it "for free" thanks to the
+	new helper function that supports apply.
+
+	* eval.c (list_star_intrinsic): New static function.
+	(eval_init): Register list_star_intrinsic as list*.
+
+	* txr.1: Document list*.
+
+2014-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	append can now take additional leading arguments before the list.
+
+	* eval.c (apply_frob_args): New static function.
+	(apply_intrinsic): Process arguments with apply_frob_args.
+	(eval_init): apply_intrinsic registered differently, as a
+	variadic function with one mandatory arg.
+
+	* lib.c (lastcons): New function.
+
+	* lib.h (lastcons): Declared.
+
+	* txr.1: Updated append documentation.
+
+2014-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (apply): Support string and vector arglist.
+	(do_eval_args): Support string or vector in dot position.
+
+	* lib.c (tolist): New function.
+
+	* lib.h (tolist): Declared.
+
+	* txr.1: Document how apply and dot position in compound forms
+	supports strings as well as vectors.
+
+2014-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (do_eval_args): If the dotted position of the argument
+	list evaluates to a vector, then convert the vector to a list.
+
+	* txr.1: Document compound forms, and how they allow the dotted
+	position and how it may be a vector.
+
+2014-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register vector_list function a second time
+	under the name vec, as a variadic function.
+
+	* txr.1: Document vec.
+
+2014-02-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_mark, hash_grow, make_similar_hash,
+	copy_hash, gethash_l, gethash, gethash_f, gethash_n, 
+	hash_count, hash_next, hash_eql, hash_equal): Use
+	num_fast instead of num.
+	(make_hash): An attempt to make a weak-keys hash that has
+	equal-based keys is nonsensical; it is now diagnosed with
+	an exception. Use num_fast instead of num.
+	(hash_process_weak): Call breakpt whenever the weak object(s) due to
+	which entries are being deleted match the value in break_obj.
+	Use num_fast instead of num.
+
+	* parser.l (parse_init): Bugfix: the forms_to_ln_hash
+	was equal-based, which makes no sense.
+
+2014-02-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Export break_obj.
+
+	* gc.c (break_obj): Change to external linkage.
+	(mark): Use t variable instead of re-evaluating obj->t.type.
+
+	* gc.h (break_obj): Declared.
+
+2014-02-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (d): Disable garbage collection around the dump.
+	It's importa for this function not to have the side effect
+	of triggering garbage collection, when it is used for 
+	debugging issues that show up under --gc-debug.
+
+2014-01-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: remove stray debugging printf from the
+	GNU Make check. This was introduced in May 2012.
+
+2014-01-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Support floating-point constants.
+	Do not color embedded decimal integers in symbols as integers.
+
+	* txr.vim: Regenerated.
+
+2014-01-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_op): When the variant is do, and the symbol
+	is an operator, then suppress the addition of the rest
+	parameter in the dotted cons position at the end of the form,
+	since this mechanism for applying additional arguments is only
+	supported by function calls, not by special forms. 
+
+	* lib.h (and2, and3): New macros.
+
+2014-01-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_op): Fix broken do operator. In the case of the do
+	operator, we must feed the entire form to the expander, not the
+	individual forms.  That is to say (do operator arg) must expand the
+	form (operator arg), whereas (op fun arg) just expands the forms fun
+	and arg individually.
+
+2014-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 77
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim: Updated.
+
+2014-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* regex.c (match_regex_right): Fix not returning value.
+
+2014-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Default argument initializer scoping rule change, allowing
+	things like (defun foo (s : (l (length s))) ...).
+	Default arguments can be initialized by expressions that
+	refer to the arguments.
+
+	* eval.c (bind_args): By means of a local array, defer the evaluation
+	of optional argument init forms until the lexical environment,
+	including all the parameters, is captured. Then valuates the forms
+	in the array, and set the variable values. 
+
+	* txr.1: Clarify the new scoping rules.
+
+2014-01-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Registered existing make_catenated_stream as
+	intrinsic.
+
+	* stream.c (cat_get_line, cat_get_char, cat_get_byte): Do not
+	remove the last stream from the stream list, so that there is
+	some stream object there which can take the unget-char or
+	unget-byte operations.
+	(cat_unget_byte, cat_unget_char): New static functions.
+	(cat_stream_ops): unget_char and unget_byte function pointers
+	filled in.
+
+	* txr.1: Documented catenated-streams.
+
+2014-01-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (struct stdio_handle): New member, is_rotated.
+	Moved mode member down.
+	(make_stdio_stream_common): Initialize is_rotated.
+	(tail_strategy): Substantially rewritten in order to address
+	a possible race condition, when a file is rotated.
+	The issue is that even when the file disappears, or when the file has
+	been replaced, we must continue reading from the old stream until the
+	end, and only then can we switch to the newly rotated file.
+
+2014-01-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (remove_path, rename_path): New functions.
+
+	* stream.h (remove_path, rename_path): Declared.
+
+	* utf8.c (w_remove, w_rename): New functions.
+
+	* utf8.h (w_remove, w_rename): Declared.
+
+	* eval.c (eval_init): Registered remove_path and rename_path
+	as intrinsics.
+
+2014-01-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (meta_meta_p, meta_meta_strip): New static functions.
+	(transform_op): Recognize compounded metas, and strip one level off.
+	(eval_init): Intern sys:expand function so we have access to the
+	form expander from TXR Lisp.
+
+	* lib.c (obj_print, obj_pprint): Fix: wasn't rendering metanumbers.
+
+	* parser.y (list): Support @ in front of anything. If it's an atom,
+	treat it similarly to a metasymbol or metanumber.
+
+	* txr.1: Documented meta-meta arguments in nested op.
+
+	* genvim.txr, txr.vim: Support coloring for compounded meta syntax.
+ 
+2014-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Lexing and parsing improvements, leaving things less hacky than before,
+	albeit hacky.
+
+	* parser.l (BSYM, NSYM): Regex definitions gone.
+	(BT0, BT1, BT2, NT0, NT1, NT2): New regex definitions.
+	(BTREG, BTKEY, NTREG, NTKEY): Rewritten, so that they cannot
+	match a lone @ character as a symbol name.
+	(grammar): Rules for returning METAPAR, METABKT and METAQUO
+	are gone. Instead, we just recognize a @ in the NESTED
+	and BRACED states and return it as a token.
+
+	* parser.y (METAPAR, METABKT, METAQUO): Token types removed.
+	(meta_expr): Nonterminal symbol removed.
+	('@'): New token type.
+	(list): Quotes and splices handling removed from this rule.
+	The new token '@' is handled here, on the other hand, because
+	there are places that reference the list rule that need to support
+	@ expressions.
+	(n_expr): Reference to meta_expr removed. Quote, unquote and splice
+	added here.
+	(yybadtoken): Removed references to METAPAR, METABKT and METAQUO.
+
+	* txr.vim, genvim.txr: There can now be whitespace in TXR Lisp
+	like @ (a b c) and @ [1 2 3].
+
+2014-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (yybadtoken): Handle METAQUO in switch.
+
+2014-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (reduce_left, reduce_right): changing the behavior so that
+	the initial value is optional. this creates the possibility that
+	the effective list of operands is empty, in which case the function
+	must support a call with no arguments, just like in the common lisp
+	reduce.
+
+	* txr.1: rewrote reduce-left and reduce-right documentation.
+
+2014-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_print, obj_pprint): Bugfix: there may be
+	additional expressions forms in (sys:var <sym>) after
+	the sym. These were not being printed. Such syntax occurs
+	often in the TXR pattern language.
+
+2014-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* regex.c (match_regex_right): New function.
+
+	* regex.h (match_regex_right): Declared.
+
+	* eval.c (eval_init): Register match_regex_right as instrinsic. 
+
+2014-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing more correct treatment of meta forms 
+	like @[...] and @(...) occurring in the TXR pattern language.
+
+	The previous behavior is that the parser always expands the interior
+	of these forms when they occur. This is wrong.
+
+	These forms only denote TXR Lisp (and so require expansion) when they
+	occur in a directive, inside a sub-expression that is not already known
+	to be Lisp.
+
+	For instance in @(do @(op foo)), the inner @(op foo) should not be
+	subject to expansion. The reason that the argument forms of @(do)
+	are TXR Lisp. The @(op foo) form denotes (sys:expr foo), and that
+	operator currently has no meaning; and so we should not expand it.
+	The previous, buggy behavior would turn the @(op ..) into 
+	a @(lambda ...).
+
+	Another example is @(bind a @(list @(op foo))) where @(list ...)
+	denotes TXR Lisp and so the interior of the form should be expanded.
+	However, the @(op foo) should not be expanded into @(lambda ...)
+
+	Expanding @(...) forms is not currently harmful, but it interferes
+	with code that wants to use the @(...) syntax for its own use,
+
+	The solution involves adding shims in the parser so that the expansion
+	is only applied when expressions are reduced to the top level
+	within a directive, and then to walk the expressions, looking for
+	the @ syntax and expanding only the outermost occurrence thereof.
+
+	* parser.y (expand_meta): New static function.
+	(n_exprs n_expr): New nonterminal symbols.
+	(elem): The arguments of the list elem (representing a generic
+	directive) now need to be put through expand_meta when it is not
+	@(do ...) or @(require ...).
+	(list): Use n_exprs instead of exprs.
+	(meta_expr): Do not call expand, and use n_expr(s) instead of expr(s).
+	(exprs, expr): These rules no become just a shim which expands
+	the outer-most metas. The actual parsing is represented by n_expr
+	and n_exprs ("n" stands for nested), which behave just like the
+	old expr and exprs.
+
+2014-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Sigh; more lexical-syntactic hacks. This adds handling
+	for the @' combination, as in @(bind a @'(foo ,bar))
+
+	* parser.l: Handle the new METAQUO token.
+
+	* parser.y (METAQUO): New token.
+	(meta_expr): New "METAQUO expr" case. Added missing METABKT
+	error handling case.
+
+2014-01-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_update): New function.
+
+	* hash.h (hash_update): Declared.
+
+	* lib.c (update): New function.
+
+	* lib.h (update): Declared.
+
+	* eval.c (eval_init): Register hash_update and update as intrinsics.
+
+	* txr.1: Documented.
+
+2014-01-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand): Bugfix in expansion of dohash: neglected
+	to insert result form into the expanded output.
+
+2014-01-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 76
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim, dep.mk: Updated.
+
+	* genvim.txr: Add missing op and do.
+
+2014-01-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_op): Takes sym argument to distinguish op and do.
+	The dwim operator is deleted when the symbol is do.
+	(expand): Expand do_s form with expand_op, not only op_s. Pass down
+	symbol.
+
+	* txr.1: Document do operator.
+
+2014-01-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (do_eval): Fix incorrect, recently introduced code
+	rearrangement that gives precedence to operator lookup over function
+	lookup.
+
+2014-01-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: @(require ...) not expanding forms.
+
+	* eval.c (expand_forms): Static function becomes external.
+	(expand_form): Remove case which handles do_s.
+
+	* eval.h (expand_forms): Declared.
+
+	* parser.y (elem): Expand both do_s and require_s forms by
+	using expand_forms.
+
+2014-01-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (conses, lazy_conses, func_set_env): New functions.
+	(lazy_conses_func): New static function.
+
+	* lib.h (conses, lazy_conses, func_set_env): Declared.
+
+	* eval.c (eval_init): conses, lazy_conses and func_set_env registered
+	as intrinsics.
+
+	* txr.1: Documented.
+
+2014-01-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Changes to the list collection mechanism to improve
+	the extension of list operations over vectors and strings.
+
+	* eval.c (do_eval_args, bindings_helper, op_each,
+	subst_vars, supplement_op_syms, mapcarv, mappendv): Switch from
+	list_collect_* macros to functions.
+
+	* lib.c (copy_list): Switch from list_collect* macros to functions.
+	Use list_collect_nconc for the final terminator. Doing a copy
+	there with list_collect_append was actually wasteful, and now
+	that list_collect_append calls copy_list in places, it triggered
+	runaway recursion.
+	(make_like): Bugfix: list_vector was used instead of vector_list.
+	(to_seq, list_collect, list_collect_nconc, list_collect_append): New
+	functions.
+	(append2, appendv, nappend2, sub_list, replace_list, ldiff, remq,
+	remql, remqual, remove_if, keep_if, proper_plist_to_alist,
+	improper_plist_to_alist, split_str, split_str_set, tok_str,
+	list_str, chain, andf, orf, lis_vector, mapcar, mapcon, mappend,
+	merge, set_diff, env): Switch from list_collect* macros to functions.
+	(replace_str, replace_vec): Allow single item replacement sequence.
+
+	* lib.h (to_seq): Declared.
+	(list_collect, list_collect_nconc, list_collect_append): Macros
+	removed, replaced by function declarations of the same name.
+	These functions return the new ptail since they cannot assign
+	to it, requiring all uses to be updated to do the assignment
+	of the returned value.
+	(list_collect_decl): Use val rather than obj_t *.
+
+	* match.c (vars_to_bindings, h_coll, subst_vars, extract_vars,
+	extract_bindings, do_output_line, do_output, v_gather, v_collect):
+	Switch from list_collect* macros to functions.
+
+	* parser.y (o_elems_transform): Likewise.
+
+	* regex.c (dv_compile_regex, regsub): Likewise.
+
+	* txr.c (txr_main): Likewise.
+
+2014-01-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support function versions of if, and, or so that partial
+	evaluation like (op or @1 42) or (op if (eq @1 foo) bar xyzzy)
+	is possible.
+
+	* eval.c (do_eval): Change precedence between operator and
+	function lookup to favor operators. This is important since
+	there are several operators now which are also functions.
+	(if_fun, or_fun, and_fun): New static functions.
+	(eval_init): New functions registered as intrinsics.
+
+	* txr.1: Documented that if, and, or exist as both functions
+	and operators.
+
+2014-01-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_instrinsic): Changed to external linkage.
+
+	* eval.h (eval_intrinsic): Declared.
+
+	* txr.c (spec_file): Global variable removed.
+	(txr_main): Support for -e and -p options. Minor code cleanup.
+
+	* txr.1: Documented new options.
+
+2014-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (mapcarv, mappendv): Convert output to type of leftmost
+	input sequence.
+
+	* lib.c (make_like): New function.
+	(reverse, remq, remql, remqual, remove_if, keep_if, mapcar, mapcon,
+	mappend, set_diff): Convert output list to type of leftmost input
+	sequence.
+
+	* lib.h (make_like): Declared.
+
+	* txr.1: Documented.
+
+2014-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (car, cdr, ldiff): Extend to handle vectors and strings.
+	Thereby, numerous previously list-only operations in TXR Lisp
+	now magically handle strings and vectors.
+
+	* txr.1: Documented.
+
+2014-01-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (broken_down_time_list): New static function.
+	(time_fields_local, time_fields_utc): New functions.
+
+	* lib.h (time_fields_local, time_fields_utc): Declared.
+
+	* eval.c (eval_init): Intern time_fields_local and time_fields_utc
+	as intrinsic functions.
+
+	* txr.1: Documented.
+
+2014-01-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (group_by): New function.
+
+	* hash.h (group_by): Declared.
+
+	* eval.c (eval_init): group_by registered as group-by intrinsic.
+
+	* txr.1: Documented.
+
+2014-01-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 75
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim: Updated.
+
+2014-01-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_print, obj_pprint): Convert the internal representation
+	of @sym and @(expr ...) syntax back to these notations instead
+	of leaving them as (sys:var sym) and (sys:expr expr ...).
+
+2014-01-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (append_each_s, append_each_star_s): New symbol variables.
+	(op_each, expand): Support append-each and append-each*.
+	(eval_init): Initialize new symbol variables, and register
+	new operators.
+
+	* txr.1: Document append-each and append-each*.
+
+2014-01-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Wrote missing documentation for throw, throwf and error.
+
+2014-01-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (stdio_seek): After a successful seek, discard the character
+	that may have been put back with unget_char.
+
+2014-01-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bind_args): Implemented default values for optional
+	arguments.
+	(op_defun): Permit the syntax.
+
+	* txr.1: Documented.
+
+2014-01-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support for pushing back bytes and characters into streams.
+
+	* stream.c (null_ops, stdio_ops, tail_ops, pipe_ops,
+	string_in_ops, byte_in_ops, string_out_ops, strlist_out_ops,
+	dir_ops, cat_stream_ops): Structure definition updated
+	with new initializers for two new virtuals.
+	(stdio_handle): New member, unget_c.
+	(snarf_line, stdio_get_char): Handle pushed-back character in
+	h->unget_c.
+	(stdio_unget_char, stdio_unget_byte, string_in_unget_char,
+	byte_in_unget_byte): New static functions.
+	(make_stdio_stream_common): Initialize unget_c member.
+	(unget_char, unget_byte): New functions.
+
+	* stream.h (struct strm_ops): New virtuals: unget_char and unget_byte.
+	(unget_char, unget_byte): New functions declared.
+
+	* syslog.c (syslog_strm_ops): Two new initializers.
+
+	* eval.c (eval_init): Registered unget_char and unget_byte as
+	intrinsics.
+
+	* txr.1: Documented.
+
+2014-01-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (put_byte): Bugfix: was checking whether the put_char
+	virtual function is not null, rather than put_byte.
+
+2014-01-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix in regex char ranges affecting ranges whose upper end
+	corresponds to the high bit of a bitmap cell: for instance
+	the character \x7f when the cell size is 32 bits.
+
+	* regex.c (BITCELL_ALL1): Unused macro removed.
+	(BITCELL_BIT): New macro to replace occurrences of a repeated
+	expression.
+	(CHAR_SET_INDEX, CHAR_SET_BIT): Updated to use BITCELL_BIT.
+	(L0_fill_range): Bugfix: the mask1 calculation was producing all-zero
+	in the condition bt1 == BITCELL_BIT; it should produce an all-ones
+	mask.
+
+2014-01-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 74
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES, txr.vim, dep.mk: Updated.
+
+2014-01-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.h (debug_check): Fix broken build when debugger is disabled:
+	the debug-disabled stub function needs six arguments.
+
+2014-01-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Some bignum-related optimizations
+
+	* arith.c (plus, minus, mul, trunc): Optimize cases
+	where bignum is opposite 1 or 0.
+
+2014-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (rising_product): New static function.
+	(n_choose_k, n_perm_k): New functions.
+
+	* arith.h (n_choose_k, n_perm_k): Declared.
+
+	* eval.c (eval_init): New functions interned.
+
+	* txr.1: Documented.
+
+2014-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (to_float): Print function name as ~a rather than ~s,
+	so it doesn't have quotes around it.
+	(cum_norm_dist): New function.
+
+	* arith.h (cum_norm_dist): Declared.
+
+	* eval.c: Include arith.h.
+	(eval_init): Register cum_norm_dist as intrinsic.
+
+	* txr.1: Documented cum-norm-dist.
+
+2014-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Detect platforms which don't reveal declarations
+	in C headers which are extensions to standard C, like popen or fileno,
+	in response to standard feature selection macros like -D_POSIX_SOURCE.
+	MinGW and Cygwin are offenders.  These platforms hide the declarations
+	when gcc is in -ansi mode, by testing for __STRICT_ANSI__. Turns out,
+	however, that -U__STRICT_ANSI__ on the gcc command line strips this
+	away, causing the declarations to be revealed.
+
+	* lib.c, parser.l, stream.c, utf8.c: Removed the declarations which
+	compensated for the above problem. Yippee!  Fuck you, stupid Cygwin
+	troglodytes, and the MinGW horse you rode in on.
+	http://cygwin.com/ml/cygwin/2011-10/msg00131.html
+
+2014-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Renaming lisp-parse to read; lisp-parse
+	is retained as an obsolescent synonym. All arguments become optional.
+
+	* parser.l (lisp_parse): Handle nil source.
+
+	* txr.1: Updated.
+
+2014-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (lang_flags): Let us switch from using _XOPEN_SOURCE=2
+	to _POSIX_C_SOURCE=199309L and _BSD_SOURCE.
+	In the .exe suffix test, try harder to redirect ls's output.
+	Test for fork stuff now needs <sys/types.h> evidently;
+	<unistd.h> does not necessarily pid_t, even though it defines
+	functions that return and accept pid_t!
+	The timegm test no longer needs _SVID_SOURCE since _BSD_SOURCE
+	covers it, and so we end up not using _SVID_SOURCE any more.
+	New tests for usleep and nanosleep.
+	The test for setenv is not conditional on timegm failing.
+
+	* eval.c: Include <time.h> and conditionally <windows.h>.
+	(usleep_wrap): New function.
+	(eval_init): New usleep_wrap function registered as usleep intrinsic.
+
+	* lib.c: Only define setenv and unsetenv if we don't have timegm,
+	because only in that situation they are used.
+
+014-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (do_txeval): Lift an annoying restriction in the pattern
+	language's expression evaluator. Whereas TXR Lisp expressions can be
+	used int the pattern language, preceded by @, it was not possible
+	to evaluate TXR Lisp variables this way. So instead of @var,
+	some clumsy trick had to be used like @(identity var). This is not
+	necessary any more. Code like @(next @*stdin*) will now work.
+
+	* txr.1: Updated.
+
+2014-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Generate HAVE_VALGRIND as #define-d to 1, rathern
+	than just fdefined.
+
+	* gc.c: Use #if HAVE_VALGRIND instaed of #ifdef HAVE_VALGRIND,
+	consistently with other HAVE_* config variables.
+
+	* lib.c: Likewise.
+
+	* lib.h: Likewise.
+
+	* txr.c: Likewise.
+
+	* txr.h: Likewise.
+
+2014-01-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix broken Json parsing test case on MinGW.
+
+	* stream.c (vformat): Fix incorrect code for normalizing
+	exponent fields in the output of sprintf's floating-point
+	conversion. For ~e, the logic would let through a leading zero.
+	For ~a/~s conversion, it was comparing to 0 instead of '0',
+	not squashing leading zeros at all.
+
+2014-01-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c: Eliminate useless #else section containing #error
+
+2013-01-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Long overdue MinGW port maintenance.
+
+	* Makefile: Use new EXE variable from config.mk.
+
+	* configure (exe, have_windows_h): New variables.
+	Handle situations with .exe suffix; on MiGW, the rm command
+	doesn't work on executables if the .exe suffix is not given.
+	New tests for localtime_r and gmtime_r.
+
+	* lib.c: Supply declarations which are missing on MinGW because
+	we use gcc -ansi, because MinGW doesn't follow established conventions
+	like -D_POSIX_SOURCE.  Supply definitions for gmtime_r, localtime_r,
+	setenv and unsetenv.
+
+	* parser.l: Supply declarations which are missing on MinGW.
+
+	* signal.h (async_sig_enabled): Declare differently based on
+	HAVE_POSIX_SIGS.
+	Misspelled typedef fixed in the code for !HAVE_POSIX_SIGS
+	that has hitherto not been compiled.
+	(sig_mask): Wrap declaration in #ifdef HAVE_POSIX_SIGS because
+	it relies on sigset_t.
+
+	* stream.c: Supply declarations which are missing on MinGW.
+	Include <windows.h> if we have it. 
+	(sleep): Define for Windows.
+	(statf): Handle missing st_blksize and st_blocks members in struct
+	stat.
+	(stream_init): Handle numerous missing S_* macros.
+
+	* utf8.c: Supply declarations which are missing on MinGW.
+
+2013-01-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 73
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2014-01-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	The lisp-parse function can now be called multiple times
+	on the same stream to extract multiple objects; the requirement
+	that the stream must hold exactly one complete Lisp object
+	with no following material is now lifted.
+
+	* parser.l (YY_INPUT): Modified the macro so that it reads no more
+	than one character. Though this probably makes the lexer less
+	efficient, it gives us the important property that the lexer does
+	not scan ahead into the input stream, hogging data into its buffer
+	which is then destroyed. This is essential if the lisp-parse function
+	is to support multiple calls to pull objects one by one out of
+	a stream.
+
+	* parser.y (spec): Use YYACCEPT in the SECRET_ESCAPE_E clause for
+	pulling a single expression out of the token stream. YYACCEPT
+	is a trick for not invoking the $accept : spec . $end production
+	which is implicitly built into the grammar, and which causes
+	a token of lookahead to occur.  This allows us to read a full
+	expression without stealing any further token: but only if the
+	grammar is structured right.
+	(exprs): This phrase structure now handles the DOTDOT syntax.
+	There is no such thing as an expr DOTDOT expr expression any more;
+	it is in the list syntax (and not supported in the dot position).
+	(expr): Remove DOTDOT syntax.
+
+	* txr.1: Updated description of .. syntax, and relaxed the description
+	of lisp-parse since it now allows multiple calls to extract
+	multiple objects.
+
+2014-01-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): Call yylex_destroy after yyparse, so we don't
+	have stray scanner state possibly interfering with a subsquent
+	parse job.
+
+2014-01-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Add forgotten until and last keywords.
+	
+	* txr.vim: Regenerated.
+
+2013-12-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Merry C++mas!
+
+	* configure: Avoid using "new" as identifier in signals test case.
+
+	* signal.c (set_sig_handler): Fix warning about { 0 } initializer.
+	(sig_mask): Avoid using "new" as identifier.
+
+
+2013-12-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing a bug and performance issue.
+
+	Problem: we are using sigsetjmp but with a jmp_buf structure;
+	it requires sigjmp_buf!
+
+	Performance issue: sigsetjmp is a dog which makes system calls.
+	Solution: let's roll our own cached version of sigprocmask which
+	only calls the real sigprocmask when the mask changes. Then
+	our extended_setjmp will just use regular setjmp, plus our own
+	custom signal saving and restoring based on the cached version.
+
+	* signal.c (sig_blocked_cache): New variable.
+	(set_sig_handler): Use our sig_mask instead of sigprocmask.
+	(mem_set_bits, mem_clr_bits): New static functions.
+	(sig_mask): New function.
+
+	* signal.h (extended_jmp_buf): New member, blocked.
+	(extended_setjmp): save blocked signals by peeking into
+	sig_blocked_cache, and restore using sig_mask.
+	(sig_blocked_cache, sig_mask): Declared.
+
+2013-12-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 72
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2013-12-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (stdio_seek): Bugfix. Was returning current position
+	whenever offset is zero, regardless of whence argument.
+
+2013-12-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (yybadtoken): Handle HASH_H.
+
+2013-12-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_defvar): Fix the semantics to be similar to Common Lisp:
+	no effect if the variable already exists.
+
+	* txr.1: Documented defvar and lisp-parse.
+
+2013-12-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (intern): fix the previous diagnostic bug once more with more
+	feeling.
+
+	* parser.l (grammar): Recognize package prefixes in symbol tokens.
+	Got rid of special rule for handling lone colon.
+
+	* parser.y (sym_helper): Catch undefined package as a parsing 
+	error rather allowing intern function to throw exception.
+
+2013-12-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Changing the tokenizer to get rid of IDENT, KEYWORD and METAVAR
+	token categories, replaced by a single one called SYMTOK.
+	Package prefixes are now recognized and processed in tokens.
+
+	* lib.c (delete_package): Fix problem in no-such-package
+	error case: it would always report nil as the name.
+	(intern): Fix nonsensical error message: in the no-such-package case it
+	would report that the symbol exists already.
+
+	* parser.l (grammar): Occurences of KEYWORD, METAVAR, and IDENT
+	scrubbed. All rules reporting any of these now return
+	SYMTOK. The main one of these is greatly simplified.
+
+	* parser.y (sym_helper): New function.
+	(char_from_name): const qualifier inside param's type declaration.
+	(grammar): IDENT, KEYWORD and METAVAR tokens are gone.
+	New token SYMTOK. Grammar refactored around SYMTOK and using
+	the new sym_helper function.
+	(char_from_name): Updated.
+
+2013-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support for parsing Lisp expression out of strings and streams.
+	New catenated streams make the Yacc hack possible.
+
+	* eval.c (eval_init): Register lisp_parse as intrinsic.
+
+	* parser.h (lisp_parse): Declared.
+
+	* parser.l: New lexical hack to produce SECRET_ESCAPE_E token.
+	(regex_parse): Move declaration before statements.
+	(lisp_parse): New function.
+
+	* parser.y (SECRET_ESCAPE_E): New token type.
+	(spec): New production rule for single expression.
+
+	* stream.c (cat_stream_print, cat_get_line, cat_get_char,
+	cat_get_byte, cat_get_prop): New static functions.
+	(cat_stream_ops): New static function.
+	(make_catenated_stream): New function.
+
+	* stream.h (make_catenated_stream): Declared.
+
+2013-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	New stream property: name. Some streams can report
+	their name: some kind of string.
+
+	* stream.c (name_k): New variable.
+	(null_get_prop): New static function.
+	(null_ops): Wire null_get_prop into ops structure.
+	(stdio_get_prop): Report h->descr as name.
+	(string_in_get_prop): New function.
+	(string_in_ops): Wire string_in_get_prop into ops structure.
+	(stream_init): Initialize name_k.
+
+	* stream.h (name_k): Declared.
+
+	* syslog.c (syslog_get_prop): Report "syslog" as
+	stream name.
+
+2013-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.c (sig_handler): Pass two arguments to signal
+	handler rather than 1. The new argument is the value t,
+	telling the handler that it's asynchronously invoked in
+	a real signal context. If the signal handler returns
+	true, then mark it deferred so that it can re-trigger
+	in a synchronous context.
+	(sig_check): Pass nil as a the second argument to signal handlers,
+	indicating that they are synchronously called, not
+	in a signal handler context.
+
+	* txr.1: Added documentation.
+
+2013-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.c (set_sig_handler): Disable signals around this
+	function because it manipulates the mask of deferred
+	signals which can also be manipulated by an async signal.
+
+2013-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* signal.c (set_sig_handler): Clear the deferred flag
+	for a signal that is being set to ignored or default.
+
+	* txr.1: Documented signals.
+
+2013-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Registered vars for signal numbers.
+
+	* signal.c (sig_hup, sig_int, sig_quit, sig_ill, sig_trap, sig_abrt,
+	sig_bus, val sig_fpe, sig_kill, sig_usr1, sig_segv, sig_usr2, sig_pipe,
+	sig_alrm, val sig_term, sig_chld, sig_cont, sig_stop, sig_tstp,
+	sig_ttin, val sig_ttou, sig_urg, sig_xcpu, sig_xfsz, sigtalrm,
+	sig_prof, val sig_poll, sig_sys, sig_winch, sig_iot, sig_stkflt,
+	sig_io, sig_lost, sig_pwr): New variables.
+	(sig_init): New variables initialized.
+
+	* signal.h: New variables declared.
+
+2013-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	First cut at signal handling support.
+
+	* Makefile (OBJS-y): Include signal.o if have_posix_sigs is "y".
+
+	* configure (have_posix_sigs): New variable, set by detecting POSIX
+	signal stuff.
+
+	* dep.mk: Regenerated.
+
+	* arith.c, debug.c, eval.c, filter.c, hash.c, match.c, parser.y,
+	parser.l, rand.c, regex.c, syslog.c, txr.c, utf8.c: Include new
+	signal.h header, now required by unwind, and the <signal.h> system
+	header.
+
+	* eval.c (exit_wrap): New function.
+	(eval_init): New functions registered as intrinsics: exit_wrap,
+	set_sig_handler, get_sig_handler, sig_check.
+
+	* gc.c (release): Unused functions removed.
+
+	* gc.h (release): Declaration removed.
+
+	* lib.c (init): Call sig_init.
+
+	* stream.c (set_putc, se_getc, se_fflush): New static functions.
+	(stdio_put_char_callback, stdio_get_char_callback, stdio_put_byte,
+	stdio_flush, stdio_get_byte): Use new functions to enable
+	signals when blocked on I/O.
+	(tail_strategy): Allow signals across sleep.
+	(pipev_close): Allow signals across waitpid.
+	(se_pclose): New static function.
+	(pipe_close): Use new function to enable signals across pclose.
+
+	* unwind.c (uw_unwind_to_exit_point): use extended_longjmp instead of
+	longjmp.
+
+	* unwind.h (struct uw_block, struct uw_catch): jb member changes from
+	jmp_buf to extended_jmp_buf.
+	(uw_block_begin, uw_simple_catch_begin, uw_catch_begin): Use
+	extended_setjmp instead of setjmp.
+
+	* signal.c: New file.
+
+	* signal.h: New file.
+
+2013-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (config_flags): Variable removed. This was more trouble than it
+	was worth, and only solved problems caused by not checking that the test
+	program was made all the way to an executable.
+
+2013-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Fix warnings in test cases for HAVE_FORK_STUFF
+	and HAVE_DAEMON.
+
+	* eval.c: daemon support must be wrapped in #if HAVE_DAEMON
+
+2013-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (txr_main): Change stderr to line buffered mode.
+
+2013-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): log_authpriv_v registered as log-authpriv.
+
+	* syslog.c (log_authpriv_v): New variable.
+	(syslog_init): New variable initialized.
+
+	* syslog.h (log_authpriv_v): Declared.
+
+	* txr.1: Documented log-authpriv, and put in notes about testing
+	for variables that may not be present, including log-perror.
+
+2013-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (symbol_value, boundp, fboundp): New functions.
+	(eval_init): New functions registred as intrinsics.
+
+	* txr.1: Documented.
+
+2013-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c, hash.c, lib.c, rand.c, stream.c, syslog.c: Removing
+	#include <assert.h> since none of these modules uses the standard C
+	assert macro.
+
+2013-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): closelog_wrap interned.
+
+	* syslog.c (closelog_wrap): New function.
+
+	* syslog.h (closelog_wrap): Declared.
+
+	* txr.1: Documented.
+
+2013-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register streamp, real_time_stream_p,
+	stream_get_prop and stream_set_prop as intrinsics.
+
+	* stream.c (stream_get_prop): New function.
+
+	* stream.h (stream_get_prop): Declared.
+
+	* syslog.c (syslog_get_prop): Bugfix: check for prio_k not real_time_k.
+
+	* txr.1: Updated.
+
+2013-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	syslog support; bitwise logior and logand functions become variadic.
+
+	* Makefile: Use -iquote to restrict our #include search paths from
+	being processed for #include <...>.  Add syslog.o to OBJS-y if
+	have_syslog is y.
+
+	* configure (have_syslog): New variable, set by detecting syslog API.
+
+	* eval.c (eval_init): logand and logior registrations changed to
+	go to variadic versions. New syslog variables and functions registered.
+
+	* lib.c (logandv, logiorv): New functions.
+
+	* lib.h (logandv, logiorv): Declared.
+
+	* txr.c (main): Call syslog_init.
+
+	* syslog.c: New file.
+
+	* syslog.h: New file.
+
+	* txr.1: Updated.
+
+	* txr.vim: Regenerated.
+
+2013-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 71
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2013-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (end_of_regex): Fix start condition stack underflow
+	during regex_parse.
+
+2013-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (regex_parse): Match the simplified grammar now
+	expected in the parser, with no slashes around the regex.
+	Change prefix for diagnostic message. 
+
+2013-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Update registration of regex-compile
+	to reflect that it has two arguments now.
+
+	* parser.y (grammar): Update calls to regex_compile to
+	pass two arguments. Since we don't expect regex_compile to
+	parse, we specify the error stream as nil.
+	(spec): The "secret syntax" for a regex is simplified
+	not to include the slashes.  This provides better diagnostics for
+	unterminated syntax and requires less string processing to generate.
+	Also, the form returned doesn't have the regex symbol
+	consed onto it, which parse_regex just throws away.
+
+	* regex.c (regex_compile): Now takes a stream argument.
+
+	* regex.h (regex_compile): Declaration updated.
+
+	* txr.1: Updated
+
+2013-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing some old-style coding that became obsolete
+	around November 2009.
+
+	* lib.c (lazy_str): Use the efficient lit("...") that
+	doesn't allocate memory instead of string(L"...").
+	(lazy_str_get_trailing_list): Likewise.
+
+	* stream.c (open_process): Likewise.
+
+	* txr.c (remove_hash_bang_line): Likewise.
+
+2013-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* regex.c (regex_compile): Handle string input.
+
+	* regex.h (regex_compile): Don't call argument
+	regex_sexp, since it can be a string.
+
+	* txr.1: Updated.
+
+2013-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Registered regex_parse as new
+	intrinsic function and std_null as new variable.
+
+	* parser.h (yylex_destroy): Existing function declared.
+
+	* parser.l (regex_parse): New function.
+	New lexical syntax added which returns SECRET_ESCAPE_R.
+
+	* parser.y (SECRET_ESCAPE_R): New token.
+	(spec): Added syntactic variant which lets us
+	smuggle a regex into the parser easily.
+
+	* stream.c:x (std_null): New global variable.
+	(null_stream_print): New static function.
+	(null_ops): New static structure.
+	(make_null_stream): New function.
+	(stream_init): Protect and initialize std_null.
+
+	* stream.h (std_null, make_null_stream): Declared.
+
+	* txr.1: New features documented: regex-parse, *stdnull*.
+
+	* txr.c (txr_main): Call yylex_destroy after parsing the program now
+	that I know about this function; this can free up some memory.
+
+2013-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (stdio_set_prop): Fix reversed boolean.
+
+2013-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (tail_strategy): Execute the strategy code also
+	in the case that the stream's FILE * handle is null. This handles
+	opening the file for the first time.
+	(make_stdio_stream_common): Do not use the FILE * handle if it is null.
+	(open_tail): Do not open the file immediately and error out.
+	This is undesirable because log files might not exist at the time
+	open_tail is called on them. Instead, produce a stream which contains
+	a null file handle, and use tail_strategy to poll for the file
+	to come into existence.
+
+	* utf8.c (w_freopen): Just in case freopen doesn't like a null
+	pointer for the existing stream, use fopen instead if that is the case.
+
+2013-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Missing catch and finally keywords added.
+
+	* txr.vim: Regenerated.
+
+2013-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	debug_check calls are the culprit triggering lookahead
+	in lazy lists. Changing the semantics of the data argument
+	so that it can just be the list.
+
+	* debug.c (debug): If data is a cons, then replace it with
+	the first item.
+
+	* match.c (match_files): Pass c.data to debug_check, rather
+	than the value of if2(consp(c.data), car(c.data)) which accesses
+	car(c.data) whether or not we are debugging.
+	(match_fun): Likewise.
+
+2013-12-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Steps toward fixing an issue: lazy list readahead.
+	The problem is that accurate lazy lists are not suitable for
+	real time use, where we want the TXR program to respond immediately
+	to matching some datum.
+
+	I'm implementing a simple, naive variant of lazy stream lists
+	which simply populates the lazy cons by reading from the stream when
+	the car or cdr fields are accessed. This type of stream can never
+	be nil (empty list) even if the file is empty; in that case
+	it will be (nil) and in general, it will have a spurious nil
+	item at the end instead of ending in a string.
+	(An adjustment was made in match.c to detect this; more 
+	will be needed.)
+
+	I'm adding attributes to streams so streams can now have a
+	"real-time" attribute. When a lazy string list is constructed over
+	a real-time stream, the simple implementation is used.
+	File streams are automatically real-time if (on Unix) they are tied
+	to tty streams. Tail streams are also real-time. 
+
+	More work is needed to achieve the goal of this change,
+	but this is a big step in the right direction.
+
+	* configure: Detect isatty function.
+
+	* lib.c (simple_lazy_stream_func): New static function.
+	(lazy_stream_cons): Use simple implementation for real-time streams.
+
+	* match.c (match_files): Do not call match_line_completely
+	with a data line that is nil (as a result of simple lazy list
+	over a real-time stream). A nil item in a lazy list of strings
+	is treated as eof.
+
+	* stream.c (real_time_k): New symbol variable.
+	(struct strm_ops): New members: get_prop, set_prop.
+	(struct stdio_handle): New member: is_real_time.
+	(stdio_get_prop, stdio_set_prop): New static function.
+	(stdio_ops, tail_ops, pipe_ops): stdio_get_prop and
+	stdio_set_prop funtions wired in.
+	(make_stdio_stream_common): Attribute streams as real-time
+	if they are tty devices.
+	(make_tail_stream): Tail streams are real-time attributed.
+	(stream_set_prop, real_time_stream_p): New functions.
+	(stream_init): Initialize real_time_k.
+
+	* stream.h (real_time_k): Declared.
+	(real_time_stream_p, stream_set_prop): Likewise.
+
+2013-11-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New functions countqual, countql, countq
+	and count_if registered as intrinsics.
+
+	* lib.c (countqual, countql, countq, count_if): New functions.
+
+	* lib.h (countqual, countql, countq, count_if): Declared.
+
+	* txr.1: New functions documented.
+
+2013-11-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (config_flags): New variable, allowing us to
+	have stricter diagnosis for configure tests.
+	(have_timegm, need_svid_source, need_bsd_source): New
+	variables.  sys/stat.h test only declares static data and
+	compiles an object file. Adding tests for timegm, tzset,
+	setenv and unsetenv.
+
+	* eval.c (eval_init): Register new intrinsic, make_time_utc.
+
+	* lib.c (make_time_impl): New static function.
+	(make_time): Reimplemented as call to make_time_impl.
+	(timegm_hack): New conditionally-defined static function.
+	(make_time_utc): New function.
+
+	* lib.h (make_time_utc): Declared.
+
+	* txr.1: make-time-utc documented.
+
+2013-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (make_time): We must subtract from the 1-12
+	month for the tm_mon member of struct tm; we
+	were adding 1 instead.
+
+2013-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (tail_calc): New function
+	(tail_strategy): Handle the situation when the file disappears. We
+	cannot throw an error, but must poll the filesystem
+	for the file to reappear.
+
+2013-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Detect the daemon function.
+
+	* eval.c: Include <unistd.h> conditionally.
+	(errno_wrap, daemon_wrap): New functions.
+	(eval_init): Registered errno_wrap and daemon_wrap as intrinsics
+	under the names daemon and errno.
+
+	* txr.1: Documented errno and daemon in new UNIX PROGRAMMING
+	section.
+
+2013-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented open-tail and make-time.
+
+2013-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Extending intrinsic functions to go up to 7 arguments.
+	Adding wrapper for mktime.
+
+	* eval.c (apply): Handle function codes N5 through N7.
+	(eval_init): Register make_time as intrinsic.
+
+	* lib.c (auto_k): New keyword symbol variable.
+	(equal, generic_funcall): Handle N5-N7.
+	(func_n5, func_n6, func_n7, func_n5v, func_n6v, func_n7v): New
+	functions.
+	(obj_init): Initialize auto_k.
+	(make_time): New function.
+
+	* lib.h (functype_t): New enum members: N5, N6, N7.
+	(struct func): New members: n5, n6, n7, n5v, n6v, n7v.
+	(auto_k, func_n5, func_n6, func_n7, func_n5v, func_n6v, func_n7v,
+	make_time): Declared.
+
+2013-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (make_stdio_stream_common): Initialize new
+	mode member of struct stdio_ops to nil.
+
+2013-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (struct stdio_handle): New member, mode.
+	(stdio_stream_mark): Mark the new member during gc.
+	(stdio_seek): When we seek, we should reset the utf8 machine.
+	(tail_strategy): New function.
+	(tail_get_line, tail_get_char, tail_get_byte): Use
+	tail_strategy for polling the file at EOF.
+	(open_tail): Store the mode in the file handle.
+
+	* utf8.c (w_freopen): New function.
+
+	* utf8.h (w_freopen): Declared.
+
+2013-11-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (conftest.clean): Use @ to suppress output.
+
+	* configure (have_unistd): New variable. Set true by every successful
+	test that compiles something that contains #include <unistd.h>.
+	HAVE_UNISTD_H is conditionally generated in config.h based on this variable.
+	Minor cleanup.
+
+	* parser.l: Inclusion of <unistd.h> wrapped in #if/#endif.
+
+	* stream.c: Conditional inclusion of <unistd.h> based on new HAVE_UNISTD_H symbol.
+
+2013-11-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Added check to detect POSIX sleep function.
+
+	* eval.c (eval_init): Register new open_tail function as intrinsic.
+
+	* match.c (complex_snarf, complex_stream): Update calls to
+	make_stdio_stream and make_pipe_stream to take fewer arguments.
+	(match_files): Support a stream object as a data source specification
+	in place of a string.
+
+	* parser.l (parse_reset): Update call to make_stdio_stream to take
+	fewer arguments.
+
+	* stream.c: Inclusion of <unistd.h> made properly conditional.
+	(struct stdio_handle): pid member defined as pid_t only if we have fork
+	functionality, otherwise defined as int.
+	(tail_get_line, tail_get_char, tail_get_byte): New static functions.
+	(tail_ops): New static structure.
+	(make_stdio_stream_common): New static structure.
+	(make_stdio_stream, make_pipe_stream): These functions lose the input
+	and output parameters, which ended up never used. Reimplemented
+	in terms of new common function.
+	(make_tail_stream): New function.
+	(make_pipevp_stream): Reimplemented in terms of new common function.
+	(open_file, open_command): Simplified by removal of useless local
+	variables and their computation, which used to be extra arguments to
+	make_stdio_stream and make_pipe_stream.
+	(open_tail): New function.
+	(stream_init): Calls to make_stdio_stream updated.
+
+	* stream.h (make_stdio_stream, make_pipe_stream): Declarations updated.
+	(make_tail_stream, open_tail): Declared.
+
+	* txr.c (txr_main): Calls to make_stdio_stream updated.
+
+2013-11-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Stream-seeking functionality.
+
+	Bugfix in stdio_flush: check FILE * handle for null.
+
+	Minor cleanups.
+
+	* eval.c (eval_init): Register seek_stream as intrinsic.
+
+	* stream.c (from_start_k, from_current_k, from_end_k): New symbol
+	variables.
+	(strm_whence): New enum.
+	(strm_ops): New member, seek.
+	(stdio_maybe_write_error): Renamed to stdio_maybe_error; takes
+	new string argument to describe action.
+	(stdio_put_string, stdio_put_char, stdio_put_byte): Updated call to
+	stdio_maybe_error.
+	(stdio_flush): Updated call to stdio_maybe_error. Check
+	handle for null.
+	(stdio_seek): New static function.
+	(stdio_ops): Added stdio_seek.
+	(pipe_ops, string_in_ops, byte_in_ops, string_out_ops,
+	strlist_out_ops, dir_ops): Added explicit zero entries and comments for
+	unimplemented functions.
+	(seek_stream): New function.
+	(stream_init): New keyword symbols interned.
+
+	* stream.h (from_start_k, from_current_k, from_end_k): New
+	variables declared.
+	(dev_k, ino_k, mode_k, nlink_k, uid_k, gid_k, rdev_k, size_k,
+	blksize_k, blocks_k, atime_k, mtime_k, ctime_k, s_ifmt, s_iflnk,
+	s_ifreg, s_ifblk, s_ifdir, s_ifchr, s_ififo, s_isuid, s_isgid, s_isvtx,
+	s_irwxu, s_irusr, s_iwusr, s_ixusr, s_irwxg, s_irgrp,
+	s_iwgrp): Existing extern variables declared.
+	(seek_stream): New function declared.
+
+	* txr.1: Documented seek-stream.
+
+2013-11-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): Bugfix: bindings were propagated in only one of two
+	subcases of a successful load.  This bug means that a loaded TXR
+	sub-query was not reliably able to bind variables that are then visible
+	to subsquent directives in the parent.  
+
+2013-11-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix for uninitialized struct member curfiles in the match context.
+	This is used for reporting the current match location in debug traces.
+
+	* match.c (mf_all): Takes new argument curfiles
+	and initializes the match_files_ctx member of the same name.
+	(do_match_line, mf_from_ml, match_filter, match_fun, extract):
+	Pass curfile to ml_all.
+
+2013-11-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Change how the hard-coded symbols (end, and, or) are
+	added, and also add the missing rep to these.
+
+	* txr.vim: Regenerated.
+
+2013-11-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 70
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2013-11-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Nasty bug fixed: @(accept) from inside a @(collect) was found not to
+	propagate bindings. The culprit?  The bindings_coll variable in the
+	v_collect function being indeterminate by the well-documented and
+	understood action of setjmp.  Marking the bindings_coll variable
+	volatile instantly fixed it.  I reviewed this code to find any other
+	instance of this oversight.
+
+	* match.c (v_skip, v_collect): Mark some local variable volatile:
+	precisely those which are used after possibly returning via an
+	unwind, and which might have been modified since setting up
+	the unwind block.
+
+2013-11-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Handle symbols whose C names end with _star_s,
+	and also ones with underscores.
+
+	* txr.vim: Updated.
+
+2013-10-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (clean): depends on conftest.clean
+	(conftest.clean): New target.
+
+	* configure: Use "make conftest.clean" to clean up conftest stuff. Note
+	that there was a bug here: brace expansion was used, but the shell is
+	/bin/sh, so conftest.err wasn't being removed.
+
+2013-10-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix 2013-10-06 regression in op syntax.  This happens when a @var
+	syntax appears in an op form, crashing the expander with infinite
+	recursion at program load time, before the code is run.
+
+	* eval.c (transform_op): The fi == var check to handle a
+	trailing op variable in the dot position of a form
+	needs to ensure that it really is @<num> type var, and
+	not the @<sym> type for instance.
+
+2013-10-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix jaw-dropping bug introduced on 2009-11-15, first affecting
+	the 022 release.
+
+	Efficient string literal objects (tag bits 11) were introduced on that
+	day.  
+	
+	The null_string object was changed to a literal, and that object is
+	efficiently returned by some string manipulation functions in cases
+	when it is obvious that the result is an empty string.
+
+	However, the LIT type code was not added to a switch statement in
+	the variable matching code, which continued to recognize only the
+	type STR as a string, to this day.
+
+	A test case for this is
+	
+	    echo ":x" | ./txr -c "@x:@x" -
+
+	which results in an "unsupported object in spec" error.
+
+	* match.c (h_var): Use stringp to test for string rather than
+	type(..) == STR. Add LIT and LSTR to the switch statement
+	so that literals an lazy strings are handled if they occur.
+	(do_output_line): Add LIT and LSTR to switch.
+
+2013-10-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Include syntactic directives which aren't extracted from
+	sources because actions aren't registered for them.
+
+	* txr.vim: Regenerated.
+
+2013-10-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Ouch! Turns out the code base has numerous unintended
+	deviations from C90, like mixed declations and
+	statements. GCC doesn't diagnose these without the
+	--pedantic flag.
+
+	* configure: GCC's --ansi flag should be spelled -ansi.
+
+	* lib.c (split_str, obj_print): Reorder declaration before statements.
+	(make_sym): Fix similar problem by eliminating a statement.
+	(funcall1, funcall2, funcall3, funcall4): Use assignment to initialize
+	local array with non-constant elements.  This is actually good for
+	performance because we only initialize those parts of the array that
+	we use.
+
+	* lib.h (struct func): Change functype member to unsigned,
+	since enum-typed bitfields are a GCC extension.
+
+	* match.c (ml_all, mf_all): Use assignments to initialize local
+	struct with non-constants.
+	(do_txeval, v_collect): Slightly revise unwinding macrology with help
+	of new macros to avoid mixing declarations and statements.
+	(spec_bind): Removed spurious semicolon from macro expansion.
+	(v_gather): Reorder two lines to avoid mixed decls and
+	statements.
+	(match_filter): Move declaration of ret a few lines up, ahead of
+	statements.
+
+	* unwind.c (uw_pop_until): New function.
+
+	* unwind.h (uw_pop_until): Declared.
+	(uw_mark_frame, uw_fast_return): New macros.
+
+2013-10-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: Split long lines of keywords.
+
+	* txr.vim: Updated.
+
+2013-10-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genvim.txr: New file.
+
+	* txr.vim: Updated using genvim.txr.
+
+2013-10-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Change to header block comment generated in config.h
+
+2013-10-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 69
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2013-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Fixed documentation bug. expt with three or more
+	arguments is a right-associative reduction, not left.
+
+2013-10-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11433. Implement continuation of multiple
+	output blocks across the same stream.
+
+	* match.c (close_s, named_k, continue_k, finish_k): New symbol
+	variables.
+	(v_output): Implement :named, :finish and :continue.
+	(v_close): New static function.
+	(syms_init): New symbols interned.
+	(dir_tables_init): New entry associating v_close
+	function with symbol stored in close_s.
+
+	* match.h (close_s): Declared.
+
+	* txr.1: New features documented.
+
+2013-10-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Fix reversed arguments in documentation for time-string-local
+	* and time-string-utc.
+
+2013-10-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 68
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2013-10-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improving behavior of op and fixing a bug.
+
+	Explicitly specifying @rest using (op ... . @rest)
+	did not work at all.
+
+	The then-func agument of iff and iffi may now be nil.
+
+	* eval.c (format_op_arg): New static function.
+	(transform_op): Handle dotted lists ending in @rest
+	or @<num>.
+	(supplement_op_syms): New static function.
+	(expand_op): Add missing numeric arguments,
+	so that all 1 through n are in the list.
+	Trailing rest is now added under different
+	conditions.
+
+	* lib.c (do_iff): Give thenfun the same
+	behavior on nil that elsefun enjoys.
+
+	* txr.1: Updated.
+
+2013-10-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	New feature: :vars argument in repeat and rep directives in an output
+	block, for specifying variables to include in iteration whose
+	presence repeat is not able to deduce.
+
+	* match.c (extract_bindings): New argument, vars, specifies
+	additional variables to consider.
+	(do_output_line, do_output): Process :vars argument of repeat
+	and rep directive.
+
+	* txr.1: Updated.
+
+2013-08-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c, utf8.c: Tabs changed to spaces. For some reason, filter.c
+	used 4 space tabs and utf8.c used 8 space tabs, inconsistently.
+
+2013-07-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 67
+
+	txr.1: Documented line continuation for string literals,
+	supported since Version 38 but not clarified properly.
+
+	RELNOTES: Updated.
+
+2013-07-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Diagnose unrecognized escape sequences in string
+	literals and quasiliterals and after @\. 
+	Support "\ " (backslash space) escape in string literals
+	and quasiliterals.
+
+2013-07-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Fix slipup, where call is referred to as funcall.
+
+2013-07-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version, set date and documented string-cmp.
+
+	* configure (txr_ver): Bumped.
+
+	* eval.c (eval_init): Forgotten string-cmp registered as intrinsic.
+
+	* txr.vim: Highlighting for string-cmp.
+
+	* RELNOTES: Updated.
+
+2013-07-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Bringing up to date.
+
+2013-06-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (require_s): New variable.
+	(v_require): New static function.
+	(syms_init): Initialize require_s.
+	(dir_tables_init): Add new entries into v_directive_table
+	and h_directive_table for new require directive.
+
+	* match.h (require_s): Declared.
+
+	* txr.1: Added do and require directives to the directive summary
+	section. Documented new require directive.
+	Fixed int-str documentation to clarify that the radix is
+	optional.
+
+2013-06-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): tok-str acquires new parameter
+
+	* lib.c (tok_str): New parameter, keep_sep.
+
+	* lib.h (tok_str): Declaration updated.
+
+	* txr.1: Documentation for tok-str updated.
+
+2013-06-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): lazy-str's third argument is optional.
+	Added lazy-stringp. Changing names of length-str-{gt,ge,lt,le}
+	to be consistent with the >, >=, < and <= functions.
+
+	* lib.c (lazy_stream_func): Greatly simplified implementation.
+	The lazy list now continues by means of recursing via 
+	an optimized version of lazy_stream_cons called lazy_stream_cont.
+	The environment structure is simplified to just hold the next item,
+	rather than a pointless list. The pointless setting of lcons->lc.func
+	to nil is also removed; this is always done by the caller.
+	(lazy_stream_cont): New static function, similar to lazy_stream_cons,
+	but optimized by not consing up a new function and new environment
+	cell.
+	(lazy_stream_cons): The environment for the update function
+	is simplified to just a single cons.
+
+	* txr.1: Documented lazy string functions and lazy-stream-cons.
+
+2012-03-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): lazy string related functions become intrinsics.
+
+	* lib.c (string_cmp): New function.
+
+	* lib.h (string_cmp): Declared.
+ 
+2013-05-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register tok_str as intrinsic.
+
+	* lib.c (tok_str): New function.
+
+	* lib.h (tok_str): Declared.
+
+	* txr.1: Documented.
+
+2013-05-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Corrected wrong function name in documentation
+	for split-str-set.
+
+2013-05-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Misleading documentation updated for split-str, which
+	takes a regex, not just a fixed string separator. Clarified
+	the corner case behaviors too.
+
+2013-05-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 66
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2013-05-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New intrinsics, time-string-local and
+	time-string-utc.
+
+	* lib.c (string_time): New static function.
+	(time_string_local, time_string_utc): New functions.
+
+	* lib.h (time_string_local, time_string_utc): Declared.
+
+	* txr.1: Documented.
+
+	* RELNOTES: Updated.
+
+2013-05-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_fun): Support debug stop on the function
+	prior to the call. The first data line number is 1, not zero,
+	if there is data.
+
+	* txr.1: Added usage example for match-fun.
+
+2013-05-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented time and url encoding/decoding functions.
+
+2013-05-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): State argument in random-fixnum should be
+	optional.
+
+	* txr.1: Documented random functions as well as range and range*
+
+2013-05-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* RELNOTES: Updated in preparation for release.
+
+	* eval.c (eval_init): Expose delete-package, rehome-sym
+	and packagep.
+
+	* lib.c (make_package, intern): use ~s formatting for package name in
+	error message.
+	(packagep, delete_package, rehome_sym): New functions.
+
+	* lib.h (packagep, delete_package, rehome_sym): Declared.
+
+	* txr.1: Documented process functions and packages.
+
+2013-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New instrinsic function iffi registered.
+	
+	* lib.c (iff): Reversed argument names corrected. No functional
+	change.
+	(iffi): New function.
+
+	* lib.h (iffi): Declared.
+
+	* txr.1: Documented iffi.
+
+2013-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (help): Help text updated.
+	(debug): Fix conflicting command assignment.
+	Show form is now 'o'.
+
+2012-10-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (int_str): Fix gaping bug introduced by previous commit,
+	which could have been caught by running the regression test suite.
+	The revised function was returning small integers as bignums.
+
+2012-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (string_lt): Bugfix: wcscmp returns some value less than zero,
+	not specifically -1.
+
+2012-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/config-types: Include the header as "config.h"
+	rather than "../config.h" because the dependency generation script
+	checks for this as a special case and treats it relative to the
+	build directory.
+
+	* dep.mk: Regenerated.
+
+2012-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (bignum_from_long): New function.
+
+	* arith.h (bignum_from_long): Declared.
+
+	* lib.c (int_str): Streamlined. Only use mp_read_radix in the case when
+	wcstol fails, because now we have bignum_from_long to handle all values
+	of long. Ensure that the bignum is normalized, in case it falls in the
+	fixnum range (does not happen on our usual platforms). 
+
+2012-09-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c: Allow the test form of a for loop to be omitted,
+	defaulting to a true test, allowing an infinite loop to
+	be expressed as (for () () () ...).
+
+	* txr.1: Documented.
+
+2012-09-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* RELNOTES: Correct incorrect 2011 years on all 2012 dates. 
+	How did that happen?
+
+2012-09-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (apply): Fix in error message: hard coded "apply" instead
+	of using ctx_form.
+
+2012-09-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: internal funcall functions not handling functions
+	with optional arguments.
+
+	* lib.c (generic_funcall): New static function, based on apply
+	from eval.c.
+	(funcall, funcall1, funcall2, funcall3, funcall4): If the function
+	being called has optional arguments, then go through generic_funcall.
+
+2012-09-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (logand): Fix incorrect return value.
+
+2012-09-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (logtest): New function.
+
+	* eval.c (eval_init): Registered logtest.
+	Registered s-ifmt, s-iflnk, s-ifreg, s-ifblk, s-ifdir,
+	s-ifchr, s-ififo, s-isuid, s-isgid, s-isvtx, s-irwxu,
+	s-irusr, s-iwusr, s-ixusr, s-irwxg, s-irgrp, s-iwgrp,
+	s-ixgrp, s-irwxo, s-iroth, s-iwoth, s-ixoth variables.
+
+	* lib.h (logtest): Declared.
+
+	* stream.c (s_ifmt, s_ifsock, s_iflnk, s_ifreg, s_ifblk,
+	s_ifdir, s_ifchr, s_ififo, s_isuid, s_isgid, s_isvtx, s_irwxu, s_irusr,
+	s_iwusr, s_ixusr, s_irwxg, s_irgrp, s_iwgrp, s_ixgrp, s_irwxo, s_iroth,
+	s_iwoth, s_ixoth): New global variables.
+
+	* stream.h (s_ifmt, s_ifsock, s_iflnk, s_ifreg, s_ifblk,
+	s_ifdir, s_ifchr, s_ififo, s_isuid, s_isgid, s_isvtx, s_irwxu, s_irusr,
+	s_iwusr, s_ixusr, s_irwxg, s_irgrp, s_iwgrp, s_ixgrp, s_irwxo, s_iroth,
+	s_iwoth, s_ixoth): Declared.
+
+	* txr.1: Documented logtest and s-* variables for stat,
+	as well as open-file and open-directory.
+
+2012-09-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Slight change in ~s directive. For a floating
+	point integer, .0 is now always shown if the precision is not given,
+	or if it is given and nonzero.  Previous behavior of ~s was add .0 only
+	when a precision is not specified. The new behavior is more
+	sensible and consistent with documentation.
+
+	* txr.1: Typo fixed in related documentation.
+
+2012-09-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (comp_trunc, logcomp): logcomp renamed to lognot,
+	consistent with Common Lisp.
+
+	* eval.c (eval_init): logcomp to lognot.
+
+	* lib.h (logcomp): Declaration updated.
+
+2012-09-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (highest_significant_bit): New static function.
+	(comp_clamp): Bugfix: avoid shifting left into sign bit. Function
+	renamed to comp_trunc.
+	(logtrunc, ash): New functions.
+
+	* eval.c (eval_init): Registered logtrunc and ash intrinsics.
+
+	* lib.h (logtrunc, ash): Declared.
+
+	* mpi-patches/add-bitops (s_highest_bit_mp): Forward declaration for
+	added.
+	(mp_clamp_comp): Bugfix in handling remainder bits. Function
+	renamed to mp_trunc_comp.
+	(mp_trunc, mp_shift): New functions.
+
+2012-09-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (highest_significant_bit): New static function.
+	(comp_clamp): Bugfix: avoid shifting left into sign bit.
+	(logclamp, ash): New functions.
+
+	* eval.c (eval_init): Registered logclamp and ash intrinsics.
+
+	* lib.h (logclamp, ash): Declared.
+
+	* mpi-patches/add-bitops (s_highest_bit_mp): Forward declaration for
+	added.
+	(mp_comp_clamp): Bugfix in handling remainder bits.
+	(mp_clamp, mp_shift): New functions.
+
+2012-09-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/add-bitops:  Bugfixes: mp_2comp is extended to properly
+	allow arbitrarily wide complements (which causes the code to access
+	beyond the a argument's digits array). A similar fix is applied in
+	the new mp_clamp_comp function.  Incorrect initializations of mp_int
+	fixed in all the logic functions: mp_init was used instead of
+	mp_init_size.
+
+2012-09-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (logand, logior, logxor): Bugfix: result needs to be
+	normalized, otherwise we end up with fixnum-range bignums.
+	(comp_clamp): New function.
+	(logcomp): Changed to two argument form. If second argument
+	is present (not nil) then call comp_clamp.
+
+	* eval.c (eval_init): Change registration of logcomp to allow
+	optional argument.
+
+	* lib.h (logcomp): Declaration updated.
+
+	* mpi-patches/add-bitops:  New mp_clamp_comp function implemented.
+
+2012-09-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding complementing function.
+
+	* arith.c (logcomp): New function.
+
+	* eval.c (eval_init): logcomp registered as intrinsic.
+
+	* lib.h (logcomp) declared.
+
+	* mpi-patches/add-bitops: Fixed bugs in mp_xor. Implemented mp_comp.
+
+2012-09-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Starting work on adding bit operations. The semantics is that
+	negative integers behave as an "infinite bit two's complement".
+
+	* arith.c (logand, logor, logxor): New functions.
+
+	* eval.c (eval_init): New intrinsic functions logand, logior, logxor.
+
+	* lib.h (logand, logor, logxor): Declared.
+
+	* mpi-patches/series: New patch, add-bitops.
+
+	* mpi-patches/add-bitops: New file.
+
+2012-09-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Fix bug in ~x format directive for printing
+	integers in hex. When we use the printf's %x conversion specifiers for
+	fixnums, we get incorrect results when the values are negative, because
+	the argument is actually treated as an unsigned integer. 
+	The end result is that (format t "~x" -1) produces FFFFFFFF
+	rather than -1. Also, merged together mindless code duplication.
+
+2012-09-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Implemented hexadecimal integer constants.
+	These will be very useful since bit operations are about
+	to be implemented.
+
+	* txr.1: Documented.
+
+2012-09-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New intrinsics: make-similar-hash, copy-hash,
+	hash-uni, hash-diff, hash-isec.
+
+	* hash.c (make_similar_hash, copy_hash, hash_uni, hash_diff,
+	hash_isec): New functions.
+
+	* hash.h (make_similar_hash, copy_hash, hash_uni, hash_diff,
+	hash_isec): Declared.
+
+	* txr.1: Updated.
+
+	* txr.vim: Highlighting for these new functions.
+
+2012-09-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Added test for <sys/stat.h>
+
+	* eval.c: New intrinsic functions "stat" and "prop".
+
+	* stream.c: Include <sys/stat.h> if we have it.
+	(w_stat, statf): New functions.
+	(val dev_k, ino_k, mode_k, nlink_k, uid_k,
+	val gid_k, rdev_k, size_k, blksize_k, blocks_k;
+	val atime_k, mtime_k, ctime_k): New sybol variables.
+	(stream_init): Intern new keywords symbols.
+
+	* stream.h (statf): Declared.
+
+	* txr.1: prop documented. Stub for stat created.
+
+2012-09-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): new instrinsic function /= registered.
+
+	* lib.c (numneqv): New function.
+
+	* lib.h (numneqv): Declared.
+
+	* txr.1: New function documented.
+
+2012-09-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_collect): Bug in processing of @(last) directive.
+	When a match for the @(last) material occured at the end of data,
+	c->data was being mistakenly set to nil rather than t before breaking
+	out of the loop, wreaking havoc. This is not a regression; this
+	was there since the inception of @(last) between versions 38 and 39.
+
+2012-09-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented string library.
+
+2012-09-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Follow function renames.
+
+	* hash.c (make_hash): Likewise.
+
+	* lib.c (assq): Renamed to assql for consistency.
+	(aconsq_new): Renamed to aconsql_new.
+	(aconsq_new_l): Renamed to aconsql_new_l.
+	(alist_remove_test): Use equal rather than eq. Association lists
+	use equal equality by default.
+	(alist_nremove): Use memqual rather than memq.
+	(alist_nremove1): Use equal rather than eq.
+	(merge): Bugfix: unnecessary consing caused by using append
+	instead of nconc on list pieces that are already destructively
+	chopped up. This has implications for the efficiency of sort
+	over lists!
+	(multi_sort_less): Implement key functions.
+	(multi_sort): Interface change: arguments rearranged, and new
+	argument to specify key functions.
+
+	* lib.h (assoc, assq, assql, aconsq_new, aconsq_new_l): Declarations
+	renamed.
+	(multi_sort): Declaration updated.
+
+	* txr.1: Documented alist library, list sorting and completed
+	documenting lazy library.
+
+	* txr.vim: multi-sort highlighted.
+
+2012-09-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Lots of new documentation. Major rearrangement of document,
+	with new headings.
+
+2012-09-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (symbol_function): Bugfix: return the function rather than
+	the whole binding.
+
+2012-09-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Minor corrections, and documented most stream functions,
+	except directory-related ones.
+
+2012-09-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented print, pprint, tostring and tostringp.
+
+2012-08-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Bugfix: under the ~a and ~s directives,
+	apply field formatting to the object not only if a nonzero width has
+	been specified, but also if precision has been specified.
+
+	* txr.1: documented stream global variables and format.
+
+2012-08-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand): Bugfix: failure to handle regular
+	expression syntax, resulting in (set ...) syntax being regarded as
+	assignment (due to another recent change).
+
+2012-08-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented chain, andf, orf and iff.
+
+2012-08-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_intrinsic): Bugfix: take the expanded form instead
+	of throwing it away.
+	(expand): Recurse into expand_place for (set ...) forms.
+
+	* txr.1: Documented eval.
+
+2012-08-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented all functions related to hashing.
+
+2012-08-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (multi_sort_less): Fixing semantics of return value. Individual
+	sorted lists are returned, rather than a list of zipped tuples.
+
+2012-08-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (multi_sort_less): Change the semantics so that when the
+	list of the functions is empty, the left item is considered less
+	than the right, thereby preserving the order.
+
+2012-08-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (mapcarv): Changed to external linkage.
+
+	* eval.h (mapcarv): Declaration added.
+	(eval_init): New intrinsic multi-sort registered.
+
+	* lib.c (multi_sort_less): New static function.
+	(multi_sort): New function.
+
+	* lib.h (multi_sort): Declared.
+
+	* txr.1: stub section added.
+
+2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Registered open-command and open-process
+	intrinsics. open-pipe is now deprecated but stays for backward
+	compatibility as a synonym for open-command.
+
+	* stream.c (open_pipe): Renamed to open_command.
+	(open_pipevp): Renamed to open_process.
+
+	* stream.h (open_pipe, open_pipevp): Declarations updated.
+
+	* txr.1: Documentation headings updated.
+
+2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (open_pipev): Bugfix: program name is included
+	as first element of argv.
+
+2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implement open_pipev in terms of popen for Windows which
+	does not have for or exec.  We could use CreateProcess and CreatePipe,
+	et cetera, but it won't buy us anything because the whole point
+	of this function is to improve the argument passing, and CreateProcess
+	takes a single command line string, not too different from popen.
+
+	* stream.c (pipev_close, make_pipev_stream): Surrounded with
+	HAVE_FORK_STUFF ifdef.
+	(pipe_close): Choice of close strategy conditional on HAVE_FORK_STUFF.
+	(open_pipev): Conditionally defined in two ways now.
+	(win_escape_arg, win_make_cmdline): New static functions.
+
+2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: New test added for fork, pipe, exec and waitpid.
+	Produces HAVE_FORK_STUFF in config.h.
+
+2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (w_fopen, w_popen): Removing unnecessary casts of
+	return values of ut8_dup_to.
+
+	* match.c (complex_open): Likewise.
+
+	* stream.c (w_opendir): Likewise.
+
+2012-05-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing new pipe function to get around the limitation
+	that popen accepts a complete command. We need something which
+	accepts a program name, and a list of arguments, so that
+	we don't have to assemble together a correctly quoted string.
+	popen needs an alternative interface resembling execvp.
+
+	* eval.c (eval_init): New intrinsic registered, open-pipe-args.
+
+	* stream.c (struct stdio_handle): New member, pid.
+	(stdio_stream_print): Print the pid, if it is nonzero.
+	(pipevp_close): New close function.
+	(pipe_close): If h->pid is nonzero, it's a new-style pipe, which
+	must be closed with pipev_close.
+	(make_stdio_stream, make_pipe_stream): Initialize new stdio_handle
+	member to zero.
+	(make_pipevp_stream): New static function.
+	(open_pipevp): New function.
+
+	* stream.h (open_pipevp): Declared.
+
+	* txr.1: open-pipe-args added to stub section heading.
+
+2012-05-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_collect): Implemented semantics for repeat symbol.
+	(dir_tables_init): Register dispatch for repeat to v_collect
+	function.
+
+	* parser.y (collect_repeat): New nonterminal symbol.
+	(clause): Removed repeat_clause error case because that now clashes
+	with the syntax in collect_clause.
+	(collect_clause): Repeat syntax implemented, with help of
+	collect_repeat.
+	(out_clause): Error case for collect_clause removed due to
+	syntactic clash.
+
+	* txr.1: Added mention of @(collect :vars nil) and documented
+	@(repeat) as the shorthand.
+
+2012-05-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Do not capture the stderr of GNU Make in the
+	configure step; send it to /dev/null.
+
+	* txr.spec: Adding specfile for building RPMs.
+
+2012-04-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (range_v_func, range_v_star_func): Restore the order of
+	arguments to plus, so that the from object is on the left. This
+	change was introduced in a commit on 2012-02-14, causing
+	character ranges to break due to bug that addition did not
+	commute for char + fixnum. Although the previous commit fixed
+	the regression, it's still good to have the object on the
+	left in case there are some future data types in case there
+	is ever some form of addition which does not commute.
+
+2012-04-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus): Fixed broken (+ fixnum char) case.
+
+2012-04-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixes for configuring and building in a separate directory.
+
+	* configure: MPI is now extracted and patched in the build directory,
+	not in the source directory.
+
+	* Makefile (CFLAGS): Refer to mpi headers relative to current
+	directory, not $(top_srcdir).
+	(repatch): Run MPI repatching steps in correct directory.
+	(clean): Remove extracted MPI from build directory.
+
+2012-04-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 65
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-04-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* regex.c (regex_space_chars): Variable removed.
+	(char_set_addr_str): New function.
+	(char_set_compile): Use char_set_addr_str to
+	add spaces to set.
+	(init_special_char_sets): Use char_set_addr_str to
+	add spaces to set. Bugfix: word_cs, cword_cs wrongly initialized.
+	(regex_init): Removed reference to regex_space_chars.
+
+2012-04-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (regtoken): New nonterminal symbol.
+	(regterm): REGTOKEN production factored out to regtoken.
+	(regclass): Reverted prior commmit's changes.
+	(regclassterm): Reverted prior commit, removing REGTOKEN
+	production for character classes, and introduced a regtoken
+	production. So now the keyword symbols are part of the
+	character class abstract syntax.
+	(regtoken): New production rule.
+
+	* regex.c (regex_space_chars): Converted to internal linkage.
+	(char_set_compile): Handle token keywords in character class
+	abstract syntax.
+
+	* regex.h (regex_space_chars): External declaration removed.
+
+2012-04-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	First cut at implementing \s, \d, \w, \S, \D and \W regex tokens.
+
+	* lib.c (init): Call regex_init.
+
+	* parser.l: return new REGTOKEN kind.
+
+	* parser.y (REGTOKEN): New token type.
+	(REGTERM): Translate REGTERM to keyword.
+	(regclass): Restructured to handle inherited nodes as lists.
+	(regclassterm): Produce $$ as list. Add handling for REGTOKEN
+	occurring inside character class by expanding it. This might not
+	be the best approach.
+	(yybadtoken): Handle REGTOKEN in switch.
+
+	* regex.c (struct any_char_set, struct small_char_set,
+	struct displaced_char_set, struct large_char_set,
+	struct xlarge_char_set): New bitfield member, stat.
+	(char_set_create): New parameter for indicating static char set.
+	(char_set_destroy): Do not free a static char set.
+	(char_set_compile): Pass zero to new parameter of char_set_create.
+	(spaces): New static array.
+	(space_cs, digit_cs, word_cs, cspace_cs, cdigit_cs, cword_cs): New
+	static pointers to char_set_t.
+	(init_special_char_sets, nfa_compile_given_set): New static function.
+	(nfa_compile_regex, dv_compile_regex): Handle new character set token
+	keywords.
+	(space_k, digit_k, word_char_k, cspace_k, cdigit_k, cword_char_k,
+	regex_space_chars): New variables.
+	(regex_init): New function.
+
+	* regex.h (space_k, digit_k, word_char_k, cspace_k, cdigit_k,
+	cword_char_k, regex_space_chars, regex_init): Declared.
+
+	* txr.1: Documented.
+
+2012-04-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New intrinsic functions remq*, remql*,
+	remqual*, remove-if*, keep-if*.
+
+	* lib.c (rem_lazy_func, rem_lazy_rec): New static functions.
+	(remq_lazy, remql_lazy, remqual_lazy, remove_if_lazy,
+	keep_if_lazy): New functions.
+
+	* lib.h (remq_lazy, remql_lazy, remqual_lazy, remove_if_lazy,
+	keep_if_lazy): Declared.
+
+	* txr.1: New functions documented.
+
+2012-04-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): find-if intrinsic registered.
+
+	* lib.c (find): First and second arguments reversed.
+	The item should be first.
+	(find_if): New function.
+
+	* lib.h (find): Declaration updated.
+	(find_if): Declaration added.
+
+	* txr.1: Stub section.
+
+2012-04-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Added notes on generational garbage collection.
+
+2012-04-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New functions remove-if and keep-if.
+
+	* lib.c (remove_if, keep_if): New functions.
+
+	* lib.h (remove_if, keep_if): Declared.
+
+	* txr.1: Documented.
+
+2012-04-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Restructuring configure script to be able to detect
+	nonexistent options. Variable default values are established first,
+	which simplifies the syntax. The scanning loop detects attempts
+	to create configuration variables that do not exist.
+	The var_given convention is folded into the parsing. (If var
+	exists, and var_given exists, and the user specifies var,
+	then var_given is set to y to indicate that the value came
+	from the user.)
+
+2012-04-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: multiple uses of @(next :args) seeing junk "args" string
+	in argument list.  Fix is not to rely on the hack of using the  first
+	element of the list of files to hold the name of the current file.
+
+	* match.c (match_files_ctx): New member, curfile.
+	(mf_all): Initialize curfile.
+	(mf_args): Set curfile to "args".
+	(mf_file_data): Initialize curfile.
+	(v_skip, v_fuzz, v_gather, v_collect): Use c->curfile rater than
+	first(c->files) in debug calls.
+	(freeform_prepare, match_files): Pass c->curfile to ml_all constructor
+	of match_line_ctx rather than rather than first(c->files).
+
+2012-04-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improve the regex Lisp syntax by allowing strings to specify
+	character compounds. I.e. the syntax "foo" is equivalent to the
+	cumbersome canonical form (compound #\f #\o #\o).
+
+	* regex.c (nfa_compile_regex, dv_compile_regex): Use chrp function
+	instead of typeof. Handle stringp case by forming a compound out of the
+	characters and recursing. Check for some bad objects in the regex
+	that would never come out of our regex parser but could occur
+	in a "hand crafted" syntax tree.
+
+2012-04-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Fix misleading comment example.
+
+2012-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding patch to MPI to disable its Makefile so people don't try
+	to work around TXR build problems by running make inside
+	the MPI directory, which is wrong.
+
+	Also fixing an incorrect use of ctype.h functions in
+	MPI and one case of a superfluous warning.
+
+	* mpi-patches/series: new patches added.
+
+	* mpi-patches/disable-make: New file.
+
+	* mpi-patches/fix-ctype-warnings: New file.
+
+2012-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	More NetBSD porting.
+
+	* Makefile (EXTRA_FLAGS): Handy new variable for additional
+	ad-hoc CFLAGS. Needed by a new test in configure.
+
+	* configure: Check for annoying warnings about char being used
+	as an array subscript when calling the macros from <ctype.h>.
+	If this occurs, suppress it by #undef-ing the macros.
+	(lang_flags): Switching fromm _XOPEN_SOURCE to _XOPEN_SOURCE=2
+	because this is needed on NetBSD to obtain declarations of
+	popen and pclose.
+
+	* stream.c (pipe_close): If we don't have the WIFCONTINUED macro,
+	then define it to expand to zero. It's absent on NetBSD and they
+	already seem to have a hack for this because there is a warning about
+	the function not being defined, but then the program links anyway.
+	Let's do it properly and not rely on their hack.
+
+2012-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (INT_PTR_MAX_MP): New static variable.
+	(in_int_ptr_range): New function.
+	(arith_init): Initialize INT_PTR_MAX_MP.
+
+	* arith.h (in_int_ptr_range): Declared.
+
+	* lib.c (c_num): Allow bignums to be converted to a cnum, if
+	they are in range, rather than allowing only fixnums.
+
+	* rand.c (make_random_state): Now that we have such a function,
+	initialize random seed using time value from time_sec_usec rather than
+	from time and clock.  clock is bad for random seeding because it
+	measures virtual time since the start of the process.
+
+2012-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Switch from _POSIX_C_SOURCE=2 to _XOPEN_SOURCE.
+	We will be relying on the gettimeofday function which only came
+	into POSIX in 2001, but was in Unix long before then.
+
+	* HACKING: Replace notes about -D_POSIX_C_SOURCE which are not true
+	any more.
+
+2012-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (conftest.ccver): New phony target.
+
+	* configure: The test for non-working 128 bit integers in the gcc
+	used by NetBSD 5.1 is not good enough to catch the bug.
+	Adding a test which will assume that gcc 4.3.x and lesser
+	does not have working 128 bit types.
+
+2012-04-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Expose regex-compile and regexp as intrinsics.
+
+	* lib.c (obj_init): Change spelling of nongreedy operator and put
+	it into the user package so that it is available for use with
+	regex-compile.
+
+	* regex.c (match_regex, search_regex): Bugfix: optional start
+	position argument argument not defaulting to zero.
+
+	* txr.1: Documented regex-compile and regexp.
+
+	* txr.vim: Highlighting regex-compile and regexp.
+
+2012-04-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Port to NetBSD (5.1).
+
+	* arith.c (bignum_dbl_ipt): Added missing #if HAVE_DOUBLE_INTPTR_T
+	around function
+
+	* configure: NetBSD's shell is too pathetic to expand "$@" properly
+	when there are no positional arguments, so I applied the ${@+"$@"}
+	trick.
+	(make): New variable. GNU make might be known only as gmake,
+	so we now detect the command for our own use within the configure
+	script and also for giving the user advice on what command to use for
+	building. Put in a fix so that the attempt to run $make --version
+	does not bail the script under "set -e" if that command terminates
+	unsuccessfully.
+	The check for clashing names has been moved earlier, so that
+	the renaming #define's appear early in config.h (so config.h itself
+	can rely on the renames). The identifier longlong_t has been added
+	to the potential clash list.  NetBSD exposes this identifier in spite
+	of -D_POSIX_SOURCE=2, and it clashes with our longlong_t.
+	The tests for integers wider than long long has been modified
+	to actually compile a multiplication of two long-long-s into 
+	the wider precision. On the NetBSD system, with gcc 4.1.3, I found
+	that the __int128 type is there, but doesn't actually work;
+	compilation of arith.c bails with an internal compiler error.
+	We now get this internal error at configure time and avoid using
+	the type.
+
+2012-04-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/add-mp-hash (mp_hash): Fix incorrect
+	code on platforms where mp_digit is smaller than long.
+	This was left shifting a mp_digit by MP_DIGIT_BIT.
+	It was found by compiling on NetBSD with a gcc 4.1.3
+	which has a broken__int128_t, forcing us to use 32 bit
+	mp_digit with a 64 bit mp_word.
+
+2012-04-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (bignum): Previously static function now exposed as external.
+
+	* arith.h (bignum): Declared.
+
+	* configure: Added check for tm_gmtoff and tm_tmzone fields
+	being present in struct tm.
+
+	* eval.c (eval_init): New intrinsic functions: time, time-usec.
+
+	* lib.c (num): If the cnum is outside of the fixnum range, then
+	construct a bignum.
+	(time_sec, time_sec_usec): New functions.
+
+	* lib.h (mut): Slight change to macro to eliminate compiler warning.
+	(time_sec, time_sec_usec): Declared.
+
+	* txr.1: Stub section for time and time-usec.
+
+	* txr.vim: Highlighting for time and time-usec.
+
+2012-04-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Fixed accidental breakage.
+
+2012-04-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c: Revert earlier change: config.h must be included before the
+	<windows.h> section because that header is conditionally included
+	based on one of the config constants.
+
+2012-04-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixes to get configure ccname=g++ working on OSX Lion.
+
+	* Makefile (conftest.syms): Use -n flag in nm so that the output
+	is not alphabetically sorted, but numerically. We need this
+	to get the symbols ordered by increasing offset.
+
+	* configure (read_syms): New function. Factors out logic used
+	in two places for reading the output of nm. On OSX Lion, it looks
+	like we do not get symbol sizes but offsets only, when compiling
+	with g++. The symbols are in an S section.  When compiling with
+	gcc, we get a common C section with symbol sizes.
+	So the hack is to use the deltas between offsets to get the sizes.
+	The objects had to be re-ordered in decreasing rank so alignment
+	doesn't create padding that will get counted as the size.
+	Interleaved dummy objects of type char should also work.
+
+2012-04-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Print done and terminate line after checking for
+	clashing symbols.
+
+2012-04-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Added new check for some clashing external names,
+	which we can redefine out of the way in config.h.
+
+	* lib.c: config.h was being included before <windows.h>.
+
+2012-04-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented int-flo, flo-int, search-regex,
+	match-regex and regsub.
+
+2012-04-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Rounding out hash table functionality with lazy lists that
+	can walk table content in different ways.
+
+	* eval.c (op_dohash): Follow interface change of hash_next.
+	(eval_init): hash-keys, hash-values, hash-pairs and hash-alist
+	intrinsics introduced.
+
+	* filter.c (trie_compress): Follow interface change of hash_next.
+
+	* hash.c (hash_next): Silly interface which takes a pointer to
+	the iterator has changed to just take the iterator. The function
+	unambiguously returns nil when the iteration ends, so there
+	is no need to set the iterator variable to nil.
+	(maphash): Follows interface change of hash_next.
+	(hash_keys_lazy, hash_values_lazy, hash_pairs_lazy, hash_alist_lazy):
+	New static functions.
+	(hash_keys, hash_values, hash_pairs, hash_alist): New functions.
+
+	* hash.h (hash_next): Declaration updated.
+	(hash_keys, hash_values, hash_pairs, hash_alist): Declared.
+
+	* lib.c (make_half_lazy_cons): New way of constructing lazy cons,
+	with the car field specified.  It simplifies situations when the
+	previous cons computes the car of the next one. Why hadn't I thought of
+	this before?
+
+	* lib.h (make_half_lazy_cons): Declared.
+
+	* txr.1: Doc stubs for new hash functions.
+
+	* txr.vim: Highlighting for new hash functions.
+
+2012-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 64
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: @[...] syntax not marked as "contained" because it
+	can freely occur, and is useful in @(output).
+
+2012-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (FRESHQ_SIZE): Preprocessor symbol renamed to FRESHOBJ_VEC_SIZE.
+	(freshobj, make_obj): Object and function definitions follow rename.
+
+2012-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (mark_obj, sweep_one, gc_is_reachable): Check for gen > 0 rather
+	than gen == 0. This allows gen == -1 objects to be considered the
+	same as gen == 0, and traversed.
+	(gc_set, gc_mutated): When a gen 0 object is added to the checkobj
+	array, set its generation to -1.  This prevents duplicates in
+	the checkobj array. Also, it fixes a bug: an vector marked as
+	mutated was not being traversed due to being in generation 1.
+
+2012-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Code cleanup and tweaking.
+
+	* gc.c (BACKPTR_VEC_SIZE): Preprocessor symbol renamed to
+	CHECKOBJ_VEC_SIZE.
+	(FULL_GC_INTERVAL): Increased to 40 since the modified
+	algorithm now leaves less work for the full gc to do.
+	(backptr, backptr_idx): Static variables renamed to
+	checkobj and checkobj_idx.
+	(mark): Follows rename of backptr and backptr_idx.
+	(gc): Commented out handy printf added.
+	(gc_set): Use in_malloc_range check to avoid adding to
+	the check array pointers which are being stored in non-heap locations,
+	since non-heap locations are already GC roots.
+	(gc_mutated): Follows variable renaming.
+	(gc_push): Just do the push using gc_set.
+
+	* lib.c (malloc_low_bound, malloc_high_bound): New variables.
+	(chk_malloc, chk_calloc, chk_realloc): Updated malloc_low_bound
+	and malloc_high_bound.
+	(in_malloc_range): New function.
+
+	* lib.h (in_malloc_range): Declared.
+
+2012-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	The mut macro should only be used for vectors or vector-like objects
+	which hold direct references to other objects and must be used
+	each time a mutation takes place.
+
+	* eval.c (op_dohash): invocations of mut macro removed. 
+	Comment rewritten.
+
+	* lib.c (sort_list): Use set macro for mutating assignment.
+	Do not invoke mut on sorted list; it won't work anyway, because
+	it doesn't mean what the code wants it to mean: that the list will be
+	fully traversed during gc marking.
+
+2012-04-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bunch of fixes.
+
+	* gc.c (gc_mutated): Return the value.
+
+	* gc.h (gc_mutated): Declaration updated.
+
+	* hash.c (remhash): Fix unsafe assignment to use set macro.
+
+	* lib.c (sort): Fix wrong use of mut macro on the list
+	before it is sorted rather than after.
+
+	* lib.h (mut): Trivial version of macro updated to return argument.
+
+	* unwind.c (uw_init): The toplevel environment's match_context
+	should be gc_protected. Though this is probably not used,
+	which is why it has not been a problem.
+
+2012-04-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_grow, gethash_l, gethash, gethash_f): Replace
+	useless use of *vecref_l() with vecref().
+
+2012-04-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (gen_gc): Default to off.
+	Help section added for gen_gc variable.
+
+	* gc.c (gc): Some missing CONFIG_GEN_GC added.
+
+2012-04-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Code cleanup.
+
+	* gc.c (backptr_oflow): Static variable removed.
+	(freshq_head, freshq_tail, partial_gc_count): Static variables removed.
+	(freshq): Array renamed to freshobj.
+	(full): Variable renamed to full_gc.
+	(freshobj_idx): New varaible.
+
+	(make_obj): Add newly born objects to freshobj array rather than
+	freshq. If freshobj array is full on entry to this function,
+	trigger gc to empty it. make_obj no longer updates the free_tail;
+	the gc routine takes care of restoring this invariant.
+	(mark_obj): Follows rename of full_gc. Some code was not wrapped
+	in #if CONFIG_GEN_GC.
+	(mark, sweep_one): Follow rename of full_gc.
+	(sweep): On entry, restore free_tail invariant in the empty
+	free_list case. Code which processes freshq from tail to head
+	replaced by simple array walk of freshobj. Code wrapped properly
+	in #if CONFIG_GEN_GC.
+	(gc): Logic for triggering full gc simplified.
+	Check added for situations when a partial gc is called when
+	the free list empties, and it doesn't liberate enough memory.
+	This prevents the situation of partial gc being called over and over
+	again by make_obj, squeezing less and less memory each time until
+	finally it returns 0 objects, and more() is called.
+	(gc_is_reachable): Follows rename of full_gc, and #if CONFIG_GEN_GC
+	added.
+	(gc_set, gc_mutated): Simplified. Check if the backptr array
+	is full and trigger gc if so to flush it, then just add to the array.
+
+2012-04-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Performance tweaking and fixes.
+
+	* gc.c (BACKPTR_VEC_SIZE): Increase greatly, so that we don't
+	trigger gc due to overflow of the backptr array. This is not likely
+	to yield a lot of free objects except in a full GC.
+	(FULL_GC_INTERVAL): From 10 to 20.
+	(gc): Take a not of whether or not gc was entered with free_list
+	being exhausted or not. Call more() only if the free_list was
+	empty, and a full sweep was done.
+	Reset partial_gc_count only when a full gc is triggered.
+
+2012-04-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix failing test case tests/006/freeform-1.txr.
+
+	* lib.c (lazy_str_force, lazy_str_force_upto): Use set macro
+	when assigning lim. This won't cause a problem unless lim is
+	in the bignum range, however.
+	(acons_new, aconsq_new): When overwriting the cdr value of
+	the existing entry, use set. This is the smoking gun;
+	these functions are used for manipulating bindings.
+	(sort): After sorting a list, we must mark it as having
+	been mutated. If a list contains only mature conses or only
+	fresh conses, there is no problem. But if it contains a mixture,
+	then sorting could reverse their relationship, causing mature
+	conses to backpoint to the fresh ones.
+	(obj_init): Use set when installing the t symbol into the user package.
+
+2012-04-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Generational GC showing signs of working. One test case in
+	test suite fails.
+
+	* gc.c (FRESHQ_SIZE): New preprocessor symbol.
+	(backptr_oflow, freshq, freshq_head, freshq_tail): New static
+	variables.
+	(make_obj): Place newly allocated generation 0 object into
+	freshq. If freshq becomes full, transfer oldest item into
+	generation 1.
+	(mark_obj): If doing only a partial gc, then do not mark
+	objects which are not generation 0.
+	(mark_mem_region): Valgrind support: cannot mark t.type field undefined
+	because it is a bitfield. Just mark the first SIZEOF_PTR bytes
+	of the object defined.
+	(mark): Under partial gc, mark the table of back pointers.
+	(sweep_one): New static function from the prior guts of sweep.
+	Reachable objects now get promoted to generation 1.
+	(sweep): Under partial gc, sweep just the freshq which identifies
+	the generation 0 objects, rather than the entire linked list of all the
+	heaps.
+	(gc): Trigger full gc also if the backptr list has overflowed
+	due to gc having been disabled.
+	Under generational gc, reset the static variables afterward:
+	clear the list of backpointers, and the freshq.
+	(gc_is_reachable): Under partial gc, report any mature object
+	as reachable.
+	(gc_set, gc_mutated): Handle backptr array overflow situation
+	when gc is disabled.
+	(gc_push): Bugfix: it is the newly pushed cons cell that has to be
+	marked as a root, not the value being pushed.
+
+	* hash.c (sethash): Use set macro for storing value.
+
+	* lib.h (set, mut, mpush): Fix wrong-way #if test for these macros.
+	The trivial versions were being defined uner CONFIG_GEN_GC and vice
+	versa!
+
+2012-04-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_modplace): push replaced with mpush (mutating push).
+
+	* gc.c (gc_push): New function.
+
+	* gc.h (gc_push): Declared.
+
+	* hash.c (pushhash): Use mpush.
+
+	* lib.c (push): Reverted to unsafe operation. TODO comment replaced
+	with warning.
+	(lazy_flatten_scan): push occurence commented as safe.
+	(lazy_stream_func): Unsafe push replaced with mpush.
+
+	* lib.h (mpush): New macro.
+
+2012-04-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Support a gen-gc configuration variable which
+	causes CONFIG_GEN_GC to be defined as 1 in config.h.
+
+	* eval.c (op_defvar, dwim_loc, op_modplace, transform_op): Handle
+	mutating assignments via set macro.
+	(op_dohash): Inform gc about mutated variables. TODO here.
+
+	* filter.c (trie_add, trie_compress): Handle mutating assignments
+	via set macro.
+
+	* gc.c (BACKPTR_VEC_SIZE, FULL_GC_INTERVAL): New preprocessor symbols.
+	(backptr, backptr_idx, partial_gc_count, full): New static variables.
+	(make_obj): Initialize generation to zero.
+	(gc): Added logic for deciding between full and partial gc.
+	(gc_set, gc_mutated): New functions.
+
+	* gc.h (gc_set, gc_mutated): Declared.
+
+	* hash.c (hash_mark): Changed useless use of vecref_l to vecref.
+	(gethash_f): Use set when assigning through *found since it
+	is a possible mutation.
+
+	* lib.c (car_l, cdr_l, vecref_l): Got rid of loc macro uses. Using the
+	value properly is going to be the caller's responsibility.
+	(push): push may be a mutation, so use set.
+	(intern): Uset set to mutate a hash entry.
+	(acons_new_l, aconsq_new_l): Use set when replacing *list.
+
+	* lib.h (PTR_BIT): New preprocessor symbol.
+	(obj_common): New macro for defining common object fields.
+	type_t is split into two bitfields, half a pointer wide,
+	allowing for generation to be represented.
+	(struct any, struct cons, struct string, struct sym, struct package,
+	struct func, struct vec, struct lazy_cons, struct cobj, struct env, 
+	struct bignum, struct flonum): Use obj_common macro to defined
+	common fields.
+	(loc): Macro removed.
+	(set, mut): Macros conditionally defined for real functionality.
+	(list_collect, list_collect_nconc, list_collect_append): Replace
+	mutating operations with set.
+
+	* match.c (dest_set, v_cat, v_output, v_filter): Replace
+	mutating operations with set.
+
+	* stream.c (string_in_get_line, string_in_get_char,
+	strlist_out_put_string, strlist_out_put_char): Replace mutating
+	operations with set.
+
+	* unwind.c (uw_register_subtype): Replace mutating operation with set.
+
+2012-04-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (vec_set_length): Use set instead of assignment.
+	(vecref_l): Use loc to lift address of cell.
+	(replace_vec): Use macro mut to indicate the object is being
+	mutated.
+
+	* lib.h (mut): New macro.
+
+2012-04-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Start of ground-work for ephemeral GC. We must add some abstraction
+	to places where we potentially assign a reference to a younger object
+	inside a field located in an older object (chronological
+	backreference) and also where we take the address of an object
+	field, making it possible that the user of the address will do so.
+
+	This patch does not take care of vectors.
+
+	No, this is not an April Fool's joke.
+
+	* eval.c (env_fbind, env_vbind, env_replace_vbind, lookup_var,
+	lookup_sym_lisp1): Use set macro instead of assignment.
+
+	* hash.c (hash_grow, set_hash_userdata, hash_next): 
+	Use set macro instead of assignment.
+
+	* lib.c (rplaca, rplacd, string_extend, length_str, replace_str,
+	rehome_sym, lazy_stream_func, lazy_str, lazy_str_force, 
+	lazy_str_force_upto, obj_init): Use set macro instead of assignment.
+
+	(car_l, cdr_l): Use loc instead of address-of operator.
+
+	* lib.h (set, loc): New macros.
+
+2012-03-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (last_equal_key, last_equal_hash): New static variables.
+	(equal_hash): Caching optimization implemented.
+	(eql_hash): Optimization extended to those objects that have
+	equal semantics.
+	(hash_process_weak): Clear the cached hash during gc.
+
+2012-03-31  Kaz Kylheku  <kaz@kylheku.com>
+
+	If one of the blocks which are subordinate to a @(trailer)
+	happen to request a successful termination by invoking @(accept)
+	the position must not advance into the trailer material.
+
+	* match.c (v_trailer): Added an unwind protect which
+	detects that an accept is taking place and adjusts the return value to
+	restrict the input position at the point given to trailer.
+	(accept_fail): Use uw_block_return_proto instead of uw_block_return
+	and pass the symbol as the protocol identifier.
+
+	* unwind.c (uw_current_exit_point): New function.
+	(uw_block_return): Function renamed to uw_block_return_proto;
+	takes new parameter which is stored in the block structure.
+
+	* unwind.h (struct uw_block): New member, protocol.
+	(uw_block_return): Becomes an inline wrapper for uw_block_return_proto.
+	(uw_block_return_proto, uw_current_exit_point): Declared.
+
+	* txr.1: Interaction between @(trailer) and @(accept) documented.
+
+2012-03-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_var): Disallow the variable named by the symbol t
+	by throwing an exception. Allow nil, but wherever nil occurs,
+	do not produce a binding.
+
+	* txr.1: State the restrictions against using t in the section
+	on Variables and also describe the nil ignore feature.
+
+2012-03-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Correction: backtracking does NOT take place into a block
+	which completed.
+
+2012-03-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documenting the debugger with an example session.
+
+2012-03-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 63
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-03-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (num_str): Much more accurate test for deciding whether
+	to treat the number as floating or integer. We can't just look
+	for the presence of E, e or . because these coudl be part of
+	trailing junk for instance "123XYZE." should convert
+	to the integer 123, where "XYZE." is trailing junk.
+
+	* txr.1: Documented int-str, flo-str and num-str.
+
+2012-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (numeq): Fix misplaced parenthesis.
+
+2012-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (min2, max2): Semantics tweak. If the numbers are equal,
+	favor the left one.
+
+	* txr.1: Documented min and max.
+
+2012-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (numeq): New function.
+	(exptmod): Bugfix: was no normalizing the bignum, ouch.
+	Also was reporting "non-integral operands" for other
+	errors.
+
+	* eval.c (eval_init): Registered = intrinsic function.
+
+	* lib.c (numeqv): New function.
+
+	* lib.h (numeq, numeqv): Declared.
+
+	* txr.1: Documented expt, sqrt, isqrt, exptmod, fixnump, bignump,
+	integerp, floatp, numberp, zerop, evenp, oddp, >, <, >=, <= and =.
+
+	* txr.vim: Highlight =
+
+2012-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (gcd): Allow zeros. Don't issue "non-integral"
+	exception if MPI fails.
+	(floorf, ceili): Map integer argument to itself.
+	(tang, asine, acosi): New functions.
+
+	* eval.c (eval_init): New intrinsics: tan, asin, acos.
+
+	* lib.h (tang, asine, acosi): Declared.
+
+	* txr.1: Documented gcd, abs, floor, ceil, sin, cos, tan
+	asin, acos, atan, log, and exp.
+
+	* txr.vim: Highlighting for tang, asine, acosi.
+
+2012-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (dmod): New static function.
+	(mod): Use dmod instead of fmod directly, to calculate
+	the correct semantics for combinations of
+	negative operands in the floating point domain also.
+
+	* txr.1: Documented /, trunc and mod.
+
+2012-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented +, - and *.
+
+2012-03-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: num-str added to doc stub.
+
+	* txr.vim: num-str added.
+
+2012-03-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_print, obj_pprint): Do not use the #<lazy-string ..>
+	notation for lazy strings that have been forced.
+
+2012-03-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Compensate for differences in printf
+	implementations with regard to printing floating point exponents.
+	by deleting any plus sign and leading zeros after the 'e'.
+
+	* tests/009/json.expected: Regenerated.
+
+2012-03-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Filtering on lists and nested lists is hereby made to work.
+	For instance given @(bind a ("a" "b" "c")) it is now possible
+	to do @(filter :upcase a) whereby a promptly takes on the value
+	("A" "B" "C").
+
+	* filter.c (string_filter): Function renamed to string_tree_filter.
+	(compound_filter): Follows rename.
+	(filter_string): Function renamed to filter string tree.
+	Can filter tree of strings, or possibly other objects,
+	if the filter function allows.
+	(filter_equal): No special case test for objects that are strings.
+	Just put them through the filter.
+
+	* filter.h (filter_string): Declaration updated.
+
+	* match.c (format_field, subst_vars, v_filter): Follow rename.
+
+2012-03-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_output): Bugfix: we should flush the stream
+	after each @(output) block. Otherwise if output blocks
+	that go to standard output are interleaved with output blocks
+	which pipe to some command which then goes to standard out,
+	the output won't be in the proper order.
+
+2012-03-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New intrinsic num-str registered.
+
+	* filter.c (tonumber_k, tointeger_k, tofloat_k, hextoint_k):
+	New keyword variables.
+	(filter_init): New variables initialized; new filters registered.
+
+	* filter.h (tonumber_k, tointeger_k, tofloat_k, hextoint_k):
+	Declared.
+
+	* lib.c (num_str): New function.
+
+	* lib.h (num_str): Declared.
+
+	* txr.1: New filters documented.
+
+2012-03-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (to_float): Fix unterminated argument list in throwf.
+
+	* lib.c (funcall): Likewise.
+
+2012-03-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (rebind_s): New symbol variable.
+
+	* lib.h (rebind_s): Declared.
+
+	* match.c (v_rebind): New static function.
+	(dir_tables_init): Registered rebind_s to v_rebind,
+	and also to hv_trampoline in the horizontal directive table.
+
+	* txr.1: Documented it.
+
+2012-03-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35989
+
+	* match.c (syms_init): text_s must be in the system
+	package because it's not a user-visible operator.
+
+2012-03-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Performance improvement in the GC: keep at least one heap's worth
+	of free space, so programs close to exhausting a heap do not
+	waste cycles frequently calling the collector.
+
+	* gc.c (more): Do not assert that free_list is null; this will
+	not be the case any more.
+	(make_obj): Comment added regarding why we the free_tail variable
+	is fixed up.
+	(sweep): Now returns a count of the objects that are free.
+	(gc): If sweep reports that less than 75% of the objects are free
+	then let us add another heap.
+
+2012-03-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register match-str and match-str-tree
+	intrinsics.
+
+	* lib.c (match_str, match_str_tree): Default position to zero.
+
+	* txr.1: Doc stubs created.
+
+	* txr.vim: Highlighting for match-str and match-str-tree.
+
+2012-03-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: code like @(skip)@{var /partial/} where
+	the regular expression does not match all the way to
+	the end of the line was getting by the check for
+	a complete match.
+
+	* match.c (do_match_line): Loses the second parameter
+	named completely. The check whether the line was matched
+	completely is done higher up, in match_line_completely.
+	This is needed because do_match_line has some early
+	successful return cases which bypass the check.
+	(match_line): Remove second paramter in call to do_match_line.
+	(match_line_completely): Do the check here that the line
+	was matched completely. Nothing can get by this.
+	(v_freeform): Do notpass second nil argument to do_match_line.
+
+2012-03-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (search_str): If start_num is nil, default it to zero.
+	This is needed for this to work right as an optional argument.
+
+2012-03-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 62
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+2012-03-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* RELNOTES: Updated.
+
+	* txr.1: Describe floating-point constants.
+
+2012-03-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (TXR_ARGS): Pass new file to tests/009/json.txr test.
+
+	* tests/009/json.expected: Updated.
+
+	* tests/009/json.txr: Updated source. Translates to a more native
+	representation with vectors and hash tables. Numbers go to
+	floating point instead of remaining as strings.
+
+	* tests/009/pass1.json: New file: a test case from json.org.
+
+2012-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (expo): New function.
+
+	* eval.c (eval_init): expo registered as intrinsic exp.
+
+	* lib.h (expo): Declared.
+
+	* txr.1: Added to stub heading.
+
+	* txr.vim: Highlighting for exp.
+
+2012-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (transform_op): use integerp instead of numberp.
+	Not all numbers are integers now, and that situation
+	requires an integer.
+
+2012-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Bugfix: was not allowing e-notation floats
+	with no decimal point like 1E1.
+
+	* stream.c: (vformat): Keep track of whether or not precision was
+	given in precision_p local variable.
+	When printing #<bad-float> pass a precision of 0
+	to vformat_str, not precision, since precision does not apply.
+	In ~f and ~e, if the precision was not given, default
+	it to 3.
+	Restructured float printing in ~a and ~s. It now just uses sprintf's %g
+	with a precision. If user does not specify precision, it defaults
+	to DBL_DIG to print the number with reasonable accuracy.
+	A .0 is added if it sprintf produces an integer, and the conversion
+	is ~s rather than ~a.
+
+2012-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix sqrt confusion. There must be a separate isqrt
+	for the integer square root.
+
+	* arith.c (sqroot_fixnum): Renamed back to isqrt_fixnum.
+	(sqroot): Rewritten to handle only floating-point square root.
+	(isqrt): New function, based on previous sqroot,
+	handles only integers.
+
+	* eval.c (eval_init): New intrinsic, isqrt.
+
+	* lib.h (isqrt): New declaration.
+
+	* txr.1: Doc stubs.
+
+	* txr.vim: Highlighting for isqrt.
+
+2012-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (floorf, ceili, sine, cosi, atang, loga): New functions.
+
+	* eval.c (eval_init): New intrinsic functions registered:
+	floor, ceil, sin, cons, atan, log.
+
+	* lib.h (floorf, ceili, sine, cosi, atang, loga): Declared.
+
+	* txr.1: Doc stub section for new functions.
+
+	* txr.vim: Highighting added.
+
+2012-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (int_flo): If sprintf produces something
+	that doesn't begin with a digit, it's most likely NaN or Inf.
+	We can turn that into an exception.
+
+	* stream.c (vformat): If sprintf produces a non-number,
+	turn it into the printed representation #<bad-float>.
+
+2012-03-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (to_float): New static function.
+	(divi): Uses to_float.
+	(zerop, gt, lt, ge, le, expt): Floating support.
+	(isqrt_fixnum): Static function renamed to sqroot_fixnum.
+	(isqrt): Renamed to sqroot. Floating support.
+	(evenp, oddp, exptmod, gcd): Work with integers, not floats.
+
+	* eval.c (eval_init): intrinsic registration of sqrt follows rename of
+	isqrt to sqroot.
+
+	* lib.h (isqrt): Declaration replaced.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (divi): New function.
+
+	* eval.c (eval_init): divi registered as / intrinsic.
+
+	* lib.h (divi): Declared.
+
+	* txr.1: divi added to stub heading.
+
+	* txr.vim: / operator highlighted.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (mod): Floating support.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (trunc): Floating support.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus, minus, mul): Removing unnecessary type checks,
+	which are already implied by the switch case.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Doc stubs for new functions floatp, integerp,
+	float-str, int-flo and flo-int.
+
+	* txr.vim: Highlighting for new functions.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile: link in -lm, which is needed now on some systems.
+
+	* arith.c (plus, minus): Eliminated some unnecessary (double) casts.
+	(abso, mul): Floating support.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (neg): Floating-point support.
+
+	* parser.l: FLO and FLODOT cases had to be reordered because
+	the lex trailing context counts as part of the match length,
+	causing 3.0 to be matched as three characters with 0 as
+	the trailing context. The cases are split up to eliminate
+	a flex warning.
+
+	* stream.c (vformat): Support bignum in floating point
+	conversion. Bugfixes: floating point conversion was
+	accessing obj->fl.n instead of using n.
+	Changed some if/else ladders to switches.
+
+2012-03-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus): Minor code simplification.
+	(minus): Floating point support.
+
+	* mpi-patches/mpi-to-double (mp_to_double): Re-apply lost
+	bugfix: index incremented instead of decremented.
+	Didn't refresh patch last time, then did a make distclean.
+
+2012-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Regression fix: 1..3 scans incorrectly into 1. .3 tokens.
+
+	* parser.l (SGN, EXP, DIG): New regex definitions.
+	(FLO): Do not recognize numbers of the form 123.
+	Decimal point must be followed either by exponent, or digits
+	(which may then be followed by an exponent).
+	(FLODOT): New token type, recognizes 123.
+	(grammar): Recognize FLODOT as a floating point number,
+	only if it not trailed by another dot, and
+	recognize FLO unconditionally.
+
+2012-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus): Completed implementation of bignum-float
+	and float-bignum cases.
+
+2012-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Use larger num_buf buffer so we don't
+	overrun. IEEE double floats can go to e+-308.
+
+2012-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (flo_int): New function.
+
+	* eval.c (eval_init): flo-int registered as intrinsic.
+
+	* lib.h (flo_int): Declared.
+
+	* mpi-patches/series: Added mpi-to-double to patch stack.
+	(mp_to_double): New MPI function.
+
+	* mpi-patches/mpi-to-double: New file.
+
+2012-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus): Optimization: use num_fast when
+	result is in the fixnum range.
+	Implemented FLNUM cases, except for adding a FLNUM
+	to BGNUM.
+	(minus, mul): Use num_fast when the cnum value is in the fixnum range.
+	(int_flo): New function.
+
+	* eval.c (eval_init): Register int-flo intrinsic.
+
+	* lib.c (c_flo): New function.
+
+	* lib.h (TYPE_SHIFT, TYPE_PAIR): New macros, carried over
+	from the lazy strings branch.
+	(c_flo, int_flo): Declared.
+
+2012-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (FLO): Adjusted syntax of floating point numbers
+	to allow leading or trailing decimal.
+
+2012-03-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): num_buf increased to 256 because we
+	are now printing floating point numbers into it, letting
+	the C library handle precision which can generate many digits.
+	We cap the precision at at 128. New format specifiers ~e
+	and ~f implemented, which loosely correspond to those of printf.
+	The ~s and ~a directives handle floats similarly to ~g in
+	printf, except that they ensure that a decimal point is printed
+	for the non-exponential notation.
+
+2012-03-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (uintptr): New variable. Indicates whether unsigned
+	version of intptr_t is available and should be generated in config.h
+	as uintptr_t.
+
+	* eval.c (eval_init): New intrinsic functions floatp,
+	integerp, flo-str.
+
+	* gc.c (finalize): Handle FLNUM case. Rearranged
+	cases so that all trivially returning cases are
+	together.
+	(mark): Handle FLNUM case.
+
+	* hash.c (hash_double): New function.
+	(equal_hash): Handle FLNUM via hash_double.
+	(eql_hash): Likewise.
+
+	* lib.c: <math.h> is included.
+	(float_s): New symbol variable.
+	(code2type, equal): Handle FLNUM case in switch.
+	(integerp): New function; does the same thing
+	as integerp before.
+	(numberp): Returns t for floats.
+	(flo, floatp, flo_str): New functions.
+	(obj_init): Initialize new float_s variable.
+	(obj_print, obj_pprint): Handle FLNUM case in switch.
+	Printing does not work yet; needs work in stream.c.
+
+	* lib.h (enum type): New enumeration FLNUM.
+	(struct flonum): New struct type.
+	(union obj): New member, fl.
+	(float_s, flo, floatp, integerp, flo_str): Declared.
+
+	* parser.l (FLO): New token pattern definition.
+	Scans to a NUMBER token.
+	Corrected uses of yylval.num to yylval.val.
+
+	* parser.y (%union): Removed num member from yystype.
+
+2012-03-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (debug): Breakpointing now takes into account 
+	the module file name, not only the line number. Breakpoints work on
+	source locations rather than line numbers.  Boy, this was easy. 
+	Keep the breakpoint list free of duplicates. Issue a message
+	if a nonexistent breakpoint is asked to be deleted.
+
+2012-03-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): url_decode has two parameters now,
+	so we make the second one optional.
+
+	* filter.c (topercent_k, frompercent_k): New keyword
+	variables.
+	(url_encode, url_decode): Take a second parameter, space_plus.
+	This determines whether or not to apply the rule that
+	a space encodes as a + character.
+	(filter_init): Initialize new keyword variables, and register :topercent
+	and :frompercent filters.  Fix the previous registrations of :tourl and
+	:fromurl using currying.
+
+	* filter.h (urlencode, urldecode): Declarations updated.
+	(topercent_k, frompercent_k): Declared.
+
+	* txr.1: Documented.
+
+2012-03-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Changing type function to not blow up on nil, which makes a lot of code
+	simpler. A pseudo type code is introduced called NIL with value 0.
+
+	* lib.h (enum type): New enumeration value, NIL.
+	(type): Function accepts object nil and maps it to code NIL.
+
+	* eval.c (dwim_loc, op_dwim): test for nil obj and goto hack is gone,
+	just handle NIL in the switch.
+
+	* gc.c (make_obj, mark): Handle new NIL type code in switch.
+
+	* hash.c (equal_hash): Handle NIL in the switch instead of nil test.
+
+	* lib.c (code2type): Map new NIL type code to null.
+	(typeof, typecheck): Code simplified.
+	(class_check, car): Move nil test into switch.
+	(eql, equal, consp, bignump, stringp, lazy_stringp,
+	symbolp, functionp, vectorp, cobjp): Simplified.
+	(length, sub, ref, refset, replace, obj_print, obj_pprint): Handle NIL
+	in switch instead of nil test.  goto hack removed from refset.
+
+	* match.c (do_match_line, do_output_line): switch condition simplified.
+
+	* regex.c (regexp): Simplified.
+	(regex_nfa): Assert condition simplified.
+
+2012-03-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c (digit_value): static function moved.
+	(html_hex_continue): Use digit_value instead of hex digits string
+	literal.
+
+2012-03-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (do_chain): More useful behavior. The first
+	function, if any, is treated as variadic. Subsequent
+	functions are monadic.
+	(chain, chainv): Turn do_chain into variadic.
+
+2012-03-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New intrinsic functions
+	chain, andf, orf, iff.
+
+	* lib.c (chainv): New function.
+	(do_and, do_or): Generalized to handle functions of
+	any arguments via apply.
+	(andf, orf): Turn do_and and do_or into variadic function instead of a
+	monadic function.
+	(do_iff): New static function.
+	(andv, orv, iff): New functions.
+
+	* lib.h (chainv, andv, orv, iff): New functions declared.
+
+	* txr.1: Doc stubs created.
+
+	* txr.vim: Updated.
+
+2012-03-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (quicksort): Bugfix: incorrect loop from 0 rather than from
+	leading to unbounded recursion.
+
+2012-03-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 61
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* eval.c (op_modplace): Fix warning about uninitialized variable.
+	No bug.
+
+	* filter.c: gcc compilation regresion: missing <stdio.h> breaks inclusion
+	of "stream.h" header. Strangely, didn't show up when configured for
+	compiling with g++ on Ubuntu.
+
+	* match.c (match_filter): Fixed ununsed variable warning.
+
+	* txr.vim: Bunch of missing keywords added.
+
+	* dep.mk: Regenerated.
+
+2012-03-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/010/block.expected: New file.
+
+	* tests/010/block.txr: New file.
+
+	* tests/010/reghash.expected: New file.
+
+	* tests/010/reghash.txr: New file.
+
+2012-03-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* RELNOTES: Updated for upcoming 61.
+
+2012-03-14  kaz kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented hash and vector quasiliterals.
+
+2012-03-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support quasiquoting over vectors also, and a bugfix for hash
+	quasiquoting.  We cannot use the same symbol for the
+	literal form from the parser, and for the expanded form,
+	because this creates a confusion when there are multiple
+	nestings of quasiquote expansion.
+
+	* eval.c (vector_lit_s, vector_list_s, hash_lit_s): New symbol
+	variables.
+	(hash_construct_s): Relocated here from hash.c.
+	(expand_qquote): Part of bugfix: look for hash_lit_s
+	instead of has_construct_s. Translate to a hash_construct_s
+	form which is no longer recognizes as a hash literal.
+	Implementing recognition of a quasiquote vector literal,
+	handled similarly.
+	(eval_init): Initialize vector_lit_s, vector_list_s,
+	hash_list_s and hash_lit_s.
+	Use vector_list_s when registering vector_list function.
+
+	* eval.h (vector_lit_s, vector_list_s, hash_lit_s,
+	hash_constuct_s): Declared.
+
+	* hash.c (hash_construct_s): Variable removed
+	and relocated into eval.c.
+	(hash_init): Initialization of hash_construct_s removed.
+
+	* hash.h (hash_construct_s): Declaration removed.
+
+	* parser.y: (vector): Action updated to generate
+	a (vec-lit ...) form if the object contains unquotes,
+	otherwise generate a vector object.
+	(hash): Generate hash-lit form, not a
+	hash-construct form.
+
+2012-03-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow quasi-quoting over hash table literals,
+	to express dynamic hash table construction
+
+	* eval.c (expand_qquote): Recognize hash-construct
+	forms: expand the hash arguments and pairs separately,
+	then rewrite to a new hash-construct form.
+	(eval-init): hash-construct intrinsic function added.
+
+	* hash.c (hash_construct_s): New symbol variable.
+	(hash_construct): New function.
+	(hash_init): Initialize hash_construct_s.
+
+	* hash.h (hash_construct_s, hash_construct): Declared.
+
+	* parser.y (hash): Rule rewritten to emit either a literal
+	hash table object, or a hash-construct form, based on
+	whether quasiquote unquotes occur within the syntax.
+	(hash_from_notation): Function removed.
+
+2012-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Change: @(block) requires @(end) from now on.
+	Blocks no longer extend to the end of the surrounding
+	scope.
+
+	* match.c (v_block): Rewrite for new syntax.
+
+	* parser.l (BLOCK): New token type handled.
+
+	* parser.y (BLOCK): New token.
+	(block_clause): New nonterminal grammar symbol.
+	(clause): Collateral fix: replaced a bunch of
+	list(X, nao) forms with cons(X, nil).
+	Introduced block_clause as a constituent of clause.
+
+	* txr.1: Revamped documentation of block, and
+	wrote about using blocks for reducing nested
+	skips and reducing backtracking in general.
+
+2012-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (ID_END): Bugfix: ID_END was defined incorrectly
+	for the current way in which an identifier token is recognized.
+	As a result @(collect-ing) was being interpreted as @(collect -ing).
+	It should be the complement of NSCHR.
+
+2012-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* regex.c (regsub): the replacement argument
+	can now be a function of one argument which maps
+	the original piece of text matched by the regex
+	to a replacement text.
+
+2012-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (stdio_put_string, stdio_put_char, stdio_put_byte): Do not
+	consider data sent to std_error to be output for the purposes of
+	the output_produced flag. Otherwise the program behavior changes
+	in -v mode; it will not print bindings.
+
+2012-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing URL filtering.
+
+	* eval.c (eval_init): New intrinsic functions: url-encode, url-decode.
+
+	* filter.c (tourl_k, fromurl_k): New keyword variables.
+	(is_url_reserved, digit_value): New static functions.
+	(url_encode, url_decode): New functions.
+	(filter_init): Intialize new keyword variables and register
+	new :tourl and :fromurl filters.
+
+	* filter.h (tourl_k, fromurl_k, url_encode, url_decode): Declared.
+
+	* txr.1: Updated.
+
+	* txr.vim: Likewise.
+
+2012-03-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (string_out_byte_flush): Bugfix. Do not loop inside this
+	function. This must not flush out more than one character out of this
+	small buffer, except when we are flushing out the last data.
+	The correct operation is predicated on the assumption that 
+	a complete character can be pulled out. That's why we move the
+	buffer to the front after consuming it, and do not automatically
+	flush until there are four bytes.
+	(string_out_put_string): We loop the call to string_out_byte_flush
+	here because when a request comes in to write a Unicode character,
+	we flush all the bytes, even if the tail of those bytes forms
+	an incomplete sequence that turns into U+DCxx codes.
+	(get_string_from_stream): Use the same loop termination test
+	as in string_out_put_string, for consistency. In that function
+	it is needed to prevent infinite looping in the case when
+	the string_out_put_string is being called from string_out_byte_flush
+	and is thus re-entering it.
+
+	* tests/010/strstream.expected: New file.
+
+	* tests/010/strstream.txr: New file.
+
+2012-03-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing put_byte for string output stream.
+	This does the Right Thing with a mixture of bytes and characters.
+	Incomplete byte sequences.
+
+	* stream.c (struct strm_ops): Changing byte argument of put_byte
+	to int, since the put_byte API function can just pass down that
+	value after validating it.
+	(stdio_handle): Use available typedef.
+	(stdio_put_byte): Follow interface change in strm_ops.
+	Do not validate the range of a byte; the put_byte higher
+	level function does that now.
+	(struct string_output): New members: ud, byte_buf, head, tail.
+	(string_out_byte_callback, string_out_byte_flush): New static
+	functions.
+	(string_out_put_string): Flush any UTF-8 bytes in the byte buffer
+	before putting the string.
+	(string_out_put_byte): New static function, implementation for
+	put_byte on string output streams.
+	(string_out_ops): string_out_put_byte wired in.
+	(make_string_output_stream): Initialize new members of
+	of struct string_output.
+	(get_string_from_stream): Flush any UTF-8 bytes in the byte buffer
+	before retrieving the string.
+	(put_byte): Validate that the byte is in range. Pass byte
+	as C int down to the put_byte virtual.
+
+2012-03-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Plugging memory leak.
+
+	* stream.c (byte_in_stream_destroy): New function.
+	(byte_in_ops): Use new function instead of noop stub.
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Update. Adding remq, remql, remqual, regsub, *stddebug*
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35718. Workaround good enough to get some code working.
+
+	* eval.c (cons_find): New function.
+	(expand_op): Use cons_find rather than tree_find to look for
+	rest_gensym.
+
+	* regex.c (regsub): Rearranged arguments so that the string
+	is last. This is better for partial evaluaton via the op
+	operator.
+
+	* regex.h (regsub): Updated declaration.
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New intrinsic function, regsub.
+
+	* regex.c (regsub): New function.
+
+	* regex.h (regsub): Declared.
+
+	* txr.1: Doc stub added.
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (split_str): Separator can be a regex now.
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 60
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+	* txr.vim: Handle : symbol properly.
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus): Showstopper bug: plus(bignum, fixnum)
+	broken for fixnum <= 0. Bad pointer passed to MPI.
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/add-mp-hash (mp_hash): Fixed use of uninitialized
+	variable on platforms where the MP digit is smaller than a long integer.
+	(Not anything TXR is known to run on). Changed algorithm to take the
+	first and last digit and add them together, rather than just taking the
+	last digit. The last digit will be zeros for numbers that contain 2 as a
+	factor with a large enough multiplicity.
+
+	* mpi-patches/add-mpi-toradix-with-case: Refreshed.
+
+	* mpi-patches/bit-search-optimizations: Likewise.
+
+	* mpi-patches/faster-square-root: Likewise.
+
+	* mpi-patches/fix-bad-shifts: Likewise.
+
+	* mpi-patches/fix-mult-bug: Likewise.
+
+2012-03-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_defun): Bugfix: documentation says that defun supports
+	the same parameter list as lambda, and that is the intent. But
+	this was broken, since op_defun was expecting the parameter list
+	to be a proper list containing only bindable symbols, ruling out
+	the use of the consing dot for rest parameter as well as the colon
+	keyword symbol for optional parmeters.
+
+2012-03-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Expose remq, remql and remqual.
+
+	* txr.1: Documented.
+
+2012-03-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (sub_str): Removed second check for lazy string that
+	can't ever come out true.
+
+	* match.c (search_form, h_var, h_coll, h_parallel, h_fun): Handle
+	position t emanating from match_line, indicating match to end of line.
+	(h_skip): When skipping to the end of line (empty spec), just
+	return t as the position rather than the end of the line. This avoids
+	calculating the length of the line, which forces a lazy string.
+	(do_match_line): Near the beginning of the loop, if the position is t,
+	then substitute the length of the line.
+	(freeform_prepare): Return the freeform line limit value.
+	(v_freeform): Check for t coming out of match line and do the
+	conversion back to the trailing list in that case, but only if
+	the freeform was limited by number of lines.
+
+2012-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (search_form): search_form works with relative positions now,
+	but match_line returns absolute, and so needs to be offset by -c->base.
+	(h_trailer, h_fun): Bugfix: return the absolute position, rather than
+	relative c->pos. The return value of these functions becomes the return
+	value of do_match_line, so the semantics has to agree.
+
+2012-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (sem_error, file_err): Bugfix: pull text formatted source
+	location using source_loc_str rather than raw object using source_loc.
+
+2012-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): Fixed broken functionality. Failing to evaluate
+	directives following the load and consume input properly.
+	Check for errors during the parse and throw an exception.
+
+2012-03-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing two instances of unintentional O(n*n) behavior and poor memory use
+	that occur in horizontal matching of basic text patterns.
+
+	* lib.c (match_str, match_str_tree): New functions.
+
+	* lib.h (match_str, match_str_tree): Declared.
+
+	* match.c (do_match_line): Use match_str_tree and match_str when matching
+	strings and string lists, respectively, rather than stupidly calling
+	search functions and then asserting that the match was found at the
+	starting position.
+
+2012-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (do_match_line): Function takes new argument, "completely".
+	The check for completely matching a line is now done within
+	do_match_line.
+	(match_line): Pass nil to do_match_line, specifying that a prefix
+	match is okay.
+	(match_line_completely): New interface to do_match_line, which
+	requests a match to the end of the line.
+	(v_freeform): Pass nil to do_match_line: freeform needs 
+	incomplete match semantics.
+	(match_files): Use match_line_completely instead of match_line.
+	By doing it this way, we do not need to compute the length of
+	the original line and compare it to the absolute position.
+	This saves time and memory since computing the length of a lazy
+	string forces it.
+
+2012-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (consume_prefix): This memory optimization should only
+	be done for lazy strings, otherwise it just causes unnecessary
+	memory use by duplicating the line, and inefficiency via
+	thanks to allocator churn.
+
+2012-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (numberp): Fix bad type check: null pointer dereference when
+	object is nil.
+
+	* match.c (do_match_line): Bugfix for incorrect treatment of long
+	lines. Must return the absolute position from the start of the original
+	line (plus(c->pos, c->base)), rather than just c->pos, which only
+	measures from the start of a line that may have been chopped by
+	consume_prefix.
+
+2012-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: rlcp function was incorrect for new way of storing
+	line number info.
+
+	* parser.h (rlset): Declared.
+	(rlcp): Use rlset.
+
+	* parser.y (rlset): New function.
+
+2012-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (help, debug): New g command for tweaking log level.
+
+2012-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c: Missing d command implemented.
+	Condense the output to 8 times the screen width, for more context.
+	Condense the output in vertical mode (when the entire input line
+	is shown) not only character mode.
+
+	* lib.c (remq, remql, remqual): New functions.
+
+	* lib.h (remq, remql, remqual): Declared.
+
+2012-02-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 59
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-02-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (sub_list, replace_list, lazy_sub_str, sub_str, replace_str,
+	sub_vec, replace_vec): Regression: replace incorrect zerop(to)
+	test with to == zero, because to is not necessarily a number.
+
+2012-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Recognize backslash-newline break in regexes.
+
+2012-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Substantially revised for better lexical accuracy
+	and highlighting of errors.
+
+2012-02-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (extract): Check for negative value of opt_nobindings,
+	which forces the printing.
+
+	* txr.c (help): Under -b, mention that printing the  word false is
+	suppressed also. Added documentation for -B.
+	(main): Implemented -B option.
+
+	* txr.1: Documented -B option and added clarifying text under -b
+	option explaining the conditions under which bindings are printed.
+
+2012-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix the issue properly, once and for all, of how to determine
+	that output has taken place and suppress the printing of bindings.
+
+	* debug.c (debug): std_output replaced with std_debug.
+
+	* eval.c (eval_init): Registered new *stddebug* variable.
+
+	* stream.c (std_debug): New variable.
+	(stdio_put_string): Check that stream is other than
+	std_debug, to determine that output has taken place.
+
+	* stream.h (std_debug): Declared.
+
+	* txr.1: Added *stddebug* to documentation stub heading.
+
+2012-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixing long-time (pre-GIT) bug. The object (nil) was stupidly used to
+	represent empty optional output clauses, distinguishing them from
+	missing clauses. This creates an ambiguity, so that an @(output)
+	block which puts out a single empty line is treated as empty.
+	Present but empty clauses are now represented by t.
+
+	* match.c (do_output_line): Check for t and bail.
+	(do_output): Check for t instead of (nil) and bail.
+
+	* parser.y (o_elems_opt2): Nonterminal deleted.
+	(out_clauses_opt): Empty case generates nil.
+	(req_parts_opt): o_elems_opt2 replaced by o_elems_opt.
+	(repeat_rep_helper): Function now keeps track of which
+	clauses were specified. For those that were specified, but
+	empty, it substitutes t.
+
+	* tests/008/empty-clauses.expected: New file.
+
+	* tests/008/empty-clauses.txr: New file.
+
+2012-02-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35625
+
+	* parser.l (BSCHR, BSYM, BTOK): New lexical definitions.
+	(BRACED): New state.
+	(grammar): Refactored so that braced variables are now handled
+	in the BRACED state, allowing for lexical differences between
+	braced variables and Lisp. This allows us to have
+	the /regex/ syntax in braces, but /regex/ is just a symbol
+	in the Lisp. The new #/ token is recognized and returned
+	as HASH_SLASH. All rules reformatted to a more easily
+	maintainble convention.
+
+	* parser.y (HASH_SLASH): New token.
+	(modifiers, lisp_regex): New nonterminals.
+	(var): Grammar changed to use modifiers nonterminal instead of exprs.
+	(var_op): Rule moved closer to var.
+	(expr): Produces lisp_regex rather than regex.
+	(yybadtoken): Handle HASH_SLASH in the switch statement.
+	Bugfix: HASH_BACKSLASH was not handled.
+
+	* txr.1: Documented #/regex/ syntax.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c: Updated copyright year.
+
+	* arith.h: Likewise.
+
+	* debug.c: Added copyright header.
+
+	* debug.h: Updated copyright year.
+
+	* eval.c: Likewise.
+
+	* eval.h: Likewise.
+
+	* filter.c: Likewise.
+
+	* filter.h: Likewise.
+
+	* gc.c: Likewise.
+
+	* gc.h: Likewise.
+
+	* hash.c: Likewise.
+
+	* hash.h: Likewise.
+
+	* lib.c: Likewise.
+
+	* lib.h: Likewise.
+
+	* match.c: Likewise.
+
+	* match.h: Likewise.
+
+	* parser.h: Likewise.
+
+	* regex.c: Likewise.
+
+	* regex.h: Likewise.
+
+	* stream.c: Likewise.
+
+	* stream.h: Likewise.
+
+	* txr.c: Likewise, and e-mail address.
+
+	* txr.h: Updated copyright year.
+
+	* unwind.c: Likewise.
+
+	* unwind.h: Likewise.
+
+	* utf8.c: Likewise.
+
+	* utf8.h: Likewise.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/008/filtenv.expected: New file.
+
+	* tests/008/filtenv.txr: New file.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34652
+
+	* match.c (do_txeval): Establish a dynamic env frame around
+	evaluation of quasiliteral and around embedded TXR Lisp expression
+	(which may contain quasiliterals) and stick the bindings there
+	via set_match_context. This way if filte functions are invoked through
+	a quasiliteral, they can see bindings.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New put-byte function interned.
+
+	* stream.c (struct strm_ops): New member, put_byte.
+	(stdio_put_byte): New function.
+	(stdio_ops, pipe_ops, string_in_ops, byte_in_ops,
+	string_out_ops, strlist_out_ops, dir_ops): Updated.
+	(put_byte): New function.
+
+	* stream.h (put_byte): Declared.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (num_esc): Skip octal indicator 'o' if present.
+	This is needed for character constants.
+	(CHRLIT): Fix broken hex constants, being treated as octal.
+
+	* txr.1: Document octal character constants.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 58
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+	* eval.c (eval_init): Updated.
+
+	* rand.c (rand): Function renamed to rnd due to a clash with
+	standard C library (that does not show up when compiling as C++).
+
+	* rand.h (rand): Declaration renamed to rnd.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l (source_loc_str): Missing function re-written.
+	(Accidentally originally written in lex.yy.c file!)
+	(parse_reset): If file can't be opened, try adding .txr suffix
+	to it.
+
+	* txr.1: Suffix-handling behavior documented.
+
+2012-02-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (clause): "Doh" moment. We don't need the special
+	transformation of the load syntax because the parent location
+	is already associated with the syntax.
+
+	* match.c (v_load): Pull out source location info from
+	the form itself.
+
+2012-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (debug): Use new way of getting line number.
+
+	* eval.c (eval_error): Use source_loc_str to get source location.
+
+	* match.c (debuglf, sem_err, file_err): Likewise.
+
+	* parser.h (source_loc_str): Declared.
+
+	* parser.l (parse_init): form_to_ln_hash must be equal based now.
+
+	* parser.y (rl): Store new form of read-time source location info.
+
+	* txr.1: Documented load.
+
+2012-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_load): Sanity checking on target path.
+	Check if it is absolute and do not substitute parent
+	file's directory.
+
+2012-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_var): Eliminated uses of rl function, in favor of
+	rlcp. Only the parser should use rl to establish location info.
+
+2012-02-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	First cut at @(load) directive. Incomplete: debug location info
+	needs to record file name, not only line number; absolute paths
+	not handled, etc.
+
+	* match.c (load_s): New symbol variable.
+	(v_load): New static function.
+	(syms_init): load_s initialized.
+	(dir_tables_init): Load directive registered.
+
+	* match.h (load_s): Declared.
+
+	* parser.h (parse_reset): New function declared.
+
+	* parser.l (spec_file_str): Global variable moved from txr.c.
+	(parse_reset): New function.
+
+	* parser.y (clause): Special handling for @(load ...) directive.
+	parent file path inserted into the syntax at parse time,
+	so when the load directive executes, it can load the file from
+	the same directory as the parent file.
+
+	* txr.c (spec_file_str): Global variable moved to parser.l.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/010/seq.txr: New file.
+
+	* tests/010/seq.expected: New file.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (sub_list, replace_list, lazy_sub_str, sub_str,
+	replace_str, sub_vec, replace_vec): Implementing floating zero
+	behavior. This is necessary so that the important case index .. (+
+	index 1) for selecting one element as a subrange works even if index is
+	negative.
+
+	* txr.1: Floating zero behavior for ranges documented.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc): del operator's return value is the
+	deleted range of values. Missing del cases added for single
+	index cases.
+
+	* lib.c (quicksort): Fix pivot selection one more time.
+	(length): Fix bad argument in "not a sequence" error.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (quicksort): Incorrect pivot selection.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (del_s): New symbol variable.
+	(eval_error): nostatic added to suppress a g++ warning.
+	(dwim_loc): Takes new value as the original unevaluated form so
+	it can control evaluation. Support for del operator added.
+	(op_modplace): Bugfixes: new value form was being unconditionally
+	evaluated and out of order w.r.t. other forms. Now there is
+	left to right order. The form is evaluated later, since for most
+	operators it is on the right, with the exception of push.
+	dwim places can now optionally control the evaluation of newform.
+	del operator supported in gethash case as a special case.
+	error case added for del: if it's not handled in gethash or
+	dwim_loc, it is an error.
+	(eval_init): del_s initialized, and del operator added to table.
+
+	* txr.vim: syntax highlighting for del.
+
+	* txr.1: Documented del.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (init): Hash bugfix: added missing call to hash_init.
+	Previously this function did nothing, but now it interns
+	some important symbols.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (remhash): Rewrote buggy function.
+	It was decrementing the hash count without checking that
+	something was deleted from the chain. The deletion was done
+	incorrectly, without regard for the kind of comparison fucntion
+	used by the hash table.
+
+2012-02-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Intrinsic bindings for sub, ref, refset
+	and replace.
+
+	* lib.c (do_sort): Static function renamed to sort_list.
+	(swap, quicksort, sort_vec): New static functions.
+	(sort): Made generic over lists, vectors and strings.
+	(refset): New function.
+
+	* lib.h (sort): Declaration updated (parameter name change).
+	(refset): Declared.
+
+	* txr.1: Mention refset.
+
+	* txr.vim: Updated with refset.
+
+2012-02-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Third argument of gethash becomes optional.
+
+2012-02-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Introducing optional arguments.
+
+	* debug.c (help, show_bindings): put_string arguments reversed.
+
+	* eval.c (bind_args): Support colon notation in interpreted
+	function lambda lists for optional arguments. Improved error checking.
+	(apply): Allow optional arguments to be left out.
+	(dwim_loc): Reversed arguments to replace_str, replace_vec,
+	replace_list.
+	(eval_init): Numerous intrinsics now have arguments that are optional.
+	New function rand introduced which reverses arguments relative to
+	random. New intrinsic function hash introduced for alternative
+	construction of hashes.
+
+	* gc.c (sweep): Reversed arguments to put_char.
+
+	* hash.c (weak_keys_k, weak_vals_k, equal_based_k): New keyword
+	symbol variables.
+	(hashv): New function.
+	(hash_init): Intern new symbols.
+
+	* hash.h (weak_keys_k, weak_vals_k, equal_based_k, hashv): Declared.
+
+	* lib.c (colon_k): New keyword symbol variable.
+	(replace_list, replace_str, replace_vec): Arguments rearranged.
+	(tree_find): testfun becomes optional argument.
+	(int_str): base becomes optional argument.
+	(func_f0, func_f1, func_f2, func_f3, func_f4, func_n0,
+	func_n1, func_n2, func_n3, func_n4,  func_f0v, func_f1v,
+	func_f2v, func_f3v, func_f4v, func_n0v, func_n1v,
+	func_n2v, func_n3v, func_n4v, func_interp): Initialize optargs to zero.
+	(func_n0o, func_n1o, func_n2o, func_n3o, func_n4o): New functions.
+	(cobj_print_op): Reversed arguments to put_string.
+	(find): testfun and keyfun become optional arguments.
+	(replace): Parameters rearranged and arguments rearranged in calls to
+	replace_list, replace_str and replace_vec.
+	(obj_init): colon_k initialized.
+	(obj_print, obj_pprint): Arguments reversed, and stream defaults
+	to std_output. Arguments reversed in calls to put_char and put_string.
+	(dump): Arguments reversed in call to put_char.
+
+	* lib.h (struct func): sizes of minparam, fixparam bitfields
+	adjusted. New bitfield optargs. New unnamed bitfield added so
+	the previous ones add up to 16 bits.
+	(colon_k): Declared.
+	(func_n0o, func_n1o, func_n2o, func_n3o, func_n4o): Declared.
+	(replace_list, replace_str, replace_vec, replace): Declarations updated.
+
+	* match.c (debuglf, dump_shell_string, dump_byte_string, dump_var,
+	do_output_line, extract): Reversed arguments to put_char and
+	put_string.
+
+	* parser.l (yyerrorf): Reversed arguments to put_char.
+	(grammar): Recognize : symbol in NESTED state. This is a keyword
+	symbol with the empty string as its name.
+
+	* rand.c (rand): New function.
+
+	* rand.h (rand): Declared.
+
+	* stream.c (strlist_out_put_string): Reversed arguments to put_string.
+	(strlist_out_put_char): Reversed arguments to put_char.
+	(get_line, get_char, get_byte): Stream defaults to std_input.
+	(vformat_num, vformat_str, vformat): Reversed arguments to put_char.
+	(put_string, put_char, put_line): Arguments reversed; stream defaults
+	to std_output.
+
+	* stream.h (put_string, put_line, put_char): Declarations updated.
+
+	* txr.c (oom_realloc_handler): Arguments to put_line reversed.
+
+	* unwind.c (uw_throw): Likewise.
+
+	* txr.1, txr.vim: Updated.
+
+2012-02-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Corrected misleading text in description of output
+	variables. Lists do not have to be wrapped in @(repeat)/@(rep).
+	Indexing notation works on strings and vectors.
+
+2012-02-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (sub, ref, replace): New functions.
+
+	* lib.h (sub, ref, replace): Declared.
+
+	* match.c (format_field): Generic indexing using new functions.
+
+	* txr.1: Documentation stub.
+
+	* txr.vim: Highlighting for new functions.
+
+2012-02-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (extract_vars): If a brace var is actually an
+	expression, then recurse into the expression to find
+	variables. This allows us to do things like @{`@x`} inside
+	a @(repeat) or @(rep).
+
+2012-02-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow braced output variables to actually be arbitrary substitutions.
+
+	* eval.c (subst_vars): Treat the variable as an arbitrary
+	expression rather than just a symbol.
+
+	* match.c (subst_vars): Likewise.
+
+	* parser.y (o_var): Further simplification. The first item in
+	an output var is an expr and not an IDENT.
+
+	* txr.1: Updated.
+
+	* txr.vim: Likewise.
+
+2012-02-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (o_var): Remove productions from grammar by using exprs_opt.
+
+2012-02-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Reimplementation of how TXR decides whether to dump bindings
+	or not. This is now done right inside the standard output stream.
+
+	* match.c (output_produced): Variable removed.
+	(complex_open): Assignment to output_produced removed.
+
+	* stream.c (output_produced): New global variable.
+	(stdio_put_string, stdio_put_char): Set output_produced
+	to t if the target of the output is stdout.
+
+	* stream.h (output_produced): Declared.
+
+	* txr.h (output_produced): Declaration removed.
+
+2012-02-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc): 2012-02-13 fix didn't do it. 
+	Here is a simpler way. We can let nil be treated as a list with a
+	simple goto. This solves all cases.
+
+2012-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Register match-fun.
+
+	* match.c (v_do): Store match context.
+	(match_fun): New function.
+
+	* match.h (match_fun): Declared.
+
+	* stream.c (streamp): New function.
+
+	* stream.h (streamp): Declared.
+
+	* txr.1: Stub section for match-fun.
+
+	* txr.vim: Highlight match-fun.
+
+2012-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_funcall): Function renamed to match_filter.
+
+	* match.h (match_funcall): Declaration updated.
+
+	* filter.c (get_filter): Updated.
+
+2012-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_catch): Treat the nil exception object as an empty
+	list, and not the atom nil.
+
+	* match.c (v_try): Do not transform an atomic exception x into
+	the list ((t . x)). Just to (x). This (t . x) representation is
+	a vestige of from the time when the exception consisted of the
+	old-style return values from txeval.
+
+2012-02-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	TXR Lisp gets exception handling.
+
+	* eval.c (op_catch, expand_catch_clause,
+	expand_catch): New static functions.
+	(expand): Handle catch operator.
+	(eval_init): Added catch operator to op_table,
+	and registered new functions throw, throwf and error.
+
+	* txr.1: Documented catch operator and created
+	stub section for throw, throwf and error.
+
+	* txr.vim: Updated.
+
+	* unwind.c (uw_throwfv, uw_errorfv): New functions.
+
+	* unwind.h (uw_throwfv, uw_errorfv): Declared.
+
+2012-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rangev_func, rangev, range_star_v_func,
+	range_star_v): Regression: handle the case where the range is
+	open-ended (to is nil).
+
+2012-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rangev): If a descending range is specified,
+	but the step is omitted, the step should be negative one
+	rather than one.
+	(range_star_v_func, range_star_v): New static functions.
+	(eval_init): New function, range*, registered.
+
+	* txr.1: Stub section for range is also for range*.
+
+	* txr.vim: Recognize range* function.
+
+2012-02-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rangev_func): Improved termination test. The sequence
+	not only if it achieves the endpoint, but if it crosses it.
+
+2012-02-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc): Allow assignment to the dwim place when it
+	evaluates to nil, by building a form targetting the place,
+	and recursing into op_modplace.  Also, optimization: don't use eval
+	on a form built from the operator; just go to op_modplace directly.
+
+2012-02-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 57
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-02-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (subst_vars): Handle lone symbols (not wrapped
+	in sys::var form) as variables. This allows interpretation of metanums
+	in quasiliterals, because these are replaced by variables in the
+	op expander.
+
+	* parser.l: Recognize METANUM in QSILIT state.
+
+	* parser.y (quasi_item): METANUM parsed in quasiliteral.
+
+	* txr.vim: Metanums highlighted properly.
+
+2012-02-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc, op_dwim): Bugfix: hash indexing requiring
+	at least two arguments, rather than at least one.
+
+2012-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Added note about register save areas, which can contribute
+	to spurious retention.
+
+2012-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (breakpoints, last_command): linkage changed to static.
+	(cols): New static variable.
+	(debug): Print context intelligently, fitting into the width of
+	the screen.
+	(debug_init): Try to get terminal width, from the COLUMNS variable.
+
+2012-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (lazy_flatten): Bugfix: function was assuming that
+	the input is a list, and not handling the case
+	atom -> (atom) like its non-lazy counterpart.
+	This broke @(next :list expr).
+
+2012-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (obj_print): Print control characters in string and
+	character literals as hex escapes, followed by semicolon if
+	necessary. Don't use iswprint function since it is locale-specific
+	and concludes that non-ASCII characters are unprintable.
+	Changed print syntax for lazy strings.
+	(obj_pprint): Changed print syntax for lazy strings.
+
+	* parser.l: Bugfix in hex/octal character constant.
+	num_esc(yytext) was called rather than num_esc(yytext+1).
+
+	* parser.y (chrlit): Bugfix: missing case for hex and octal
+	constants which are given by a LITCHAR token.
+
+	* stream.c (vformat): Bugfix: strings were being printed as if using ~a
+	even under ~s.
+
+2012-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11486
+
+	* match.c (h_coll): Call consume_prefix in the loop.
+
+2012-02-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11486: continuation. Take into account base position
+	in debug reporting.
+
+	* debug.c (debug): New argument, base.
+
+	* debug.h (debug_check): New argument, base.
+	(debug): Declaration updated.
+
+	* eval.c (do_eval): Pass new argument of debug_check as nil.
+
+	* match.c (LOG_MISMATCH, LOG_MATCH): Take into account base
+	when displaying character position.
+	(do_match_line): Pass base position to debug_check.
+	(match_files): Pass nil as base to debug_check.
+
+2012-02-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11486: continuation. Now able to @(skip) through
+	a large file horizontally under @(freeform) in constant memory.
+	Position reporting is incorrect.
+
+	* match.c (match_line_ctx): New member, base.
+	(ml_all): Initialize new member to zero.
+	(consume_prefix): New static function.
+	(do_match_line): New static function, contains implementation of
+	match_line. Calls consume_prefix.
+	(match_line): Becomes a wrapper for do_match_line.
+	(search_form, h_skip): Call consume_prefix.
+	(freeform_prepare): New function. External to avoid inlining.
+	(v_freeform): Uses do_match_line, to down context by reference,
+	and also refactored to avoid spurious retention of c->data.
+
+	* unwind.c (uw_push-block, uw_push_env, uw_push_debug,
+	uw_push_catch): Zero out the structure, otherwise the unused
+	fields can cause spurious retention.
+
+2012-02-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11486: preparatory refactoring.
+
+	* match.c (h_match_func): Changed to one-argument form.
+	(LOG_MISMATCH, LOG_MATCH): References to structure members
+	changed from member selection . to ->.
+	(h_text, h_var, h_skip, h_coll, h_parallel, h_trailer,
+	h_fun, hv_trampoline, h_define, h_do): Changed to one-argument form
+	that takes a pointer to the context.
+	(match_line): Local pointer named c used so that the
+	LOG_MISMATCH and LOG_MATCH macros can be used.
+
+2012-02-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (lazy_sub_str): New static function.
+	(sub_str): Bugfix: handle t values of from from and to, and negative
+	indices, just like sub_vec.  Special handling for lazy strings
+	introduced.  If to is the value t, then the a lazy string can be
+	produced.
+
+2012-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Updated.
+
+	* txr.vim: Fixed mistakes in a few regex character classes,
+	causing upper case letters not to be recognized as part
+	of a variable name, and character hex constant.
+
+2012-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 56
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Allow semicolon terminator on hex and octal
+	escapes in a regex. Removed o escape character from octal
+	constants in strings and quasiliterals: no such thing is documented.
+	Octal constants can be semicolon-terminated like hex ones.
+
+	* txr.1: Documented semicolons after octal constants in
+	string literals and after hex and octal constants in regexes.
+
+2012-02-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (utf8_from_uc, utf8_decode): Some cascaded if tests converted
+	to a switch on the upper nybble value. This also fixes an unfortunate
+	bug. The test for the two byte case was written as 
+	ch >= 0xc2 && ch <= 0xE0. That should have been ch < 0xE0.
+	Versions of TXR up to 55 have been incorrectly decoding some UTF-8.
+
+2012-02-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (utf8_from_uc): Bugfix: incorrect condition in character
+	range check (less than minimum *and* U+DCxx, rather than *or*).
+	Also, we must check for out of range characters. UTF-8 sequences
+	beginning with F4 can code beyond 0x10FFFF.
+	(utf8_decode): Check for characters beyond 0x10FFFF.
+
+2012-02-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (rest_s, op_s): New variables.
+	(do_eval_args): Allow calls specified by improper lists
+	like (x y . z) where the z expression must evaluate to a list 
+	that turns into addition arguments to be applied.
+	(transform_op, expand_op): New static functions.
+	(expand): Call expand_op.
+	(eval_init): Initialize rest_s and op_s. Use rest_s
+	to register rest function.
+
+	* lib.c (gensym): New function based on gensymv.
+	(gensymv): Now calls gensym.
+
+	* lib.h (gensym): Declared.
+
+	* parser.l: Parse @ followed by digits as a new kind of token,
+	METANUM.
+
+	* parser.y (METANUM): New token.
+	(meta_expr, exprs): Missing rlcp's added.
+	(expr): METANUM variant introduced.
+	(yybadtoken): Handle METANUM.
+
+	* txr.1: Documented one-symbol argument list of lambda.
+	Documented op. Closed some unbalanced parentheses.
+
+	* txr.vim: Highlight op.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (utf8_from_uc, utf8_decode): Use upper case for hex constants.
+	If bytes decode to U+DCxx, treat this sequence as invalid. This
+	way we can't be fooled by an attacker into accepting some U+DCxx which
+	on output we will then convert to byte xx.
+	(utf8_to_uc): Use upper case for hex constants.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (utf8_to_uc, utf8_encode): Do not encode surrogate code
+	points (U+DC00 to U+DCFF) as multi-byte UTF8 sequences.  We use
+	that range for invalid bytes on input, so on output the best thing
+	to do is to reproduce the original bytes. E.g the code U+DCA0
+	will produce the byte A0.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: UTF-8 handling clarified.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* utf8.c (utf8_from_uc, utf8_decode): Impose a minium value on the
+	decoded character based on which UTF-8 case it is from.  This rejects
+	overlong forms.
+
+	* utf8.h (struct utf8_decoder): New member, wch_min.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Document that TXR accepts UTF-8 overlong forms.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Move error match before other cases and simplify.
+	Comment are colorized properly again.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	This test case would have caught the prior regression.
+
+	* Makefile (TXR_ARGS): Defined for new test case.
+
+	* tests/010/align-columns.dat: New file.
+
+	* tests/010/align-columns.expected: New file.
+
+	* tests/010/align-columns.txr: New file.
+
+2012-02-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (format_field): Regression. Was not handling modifiers
+	which are compound expression (e.g. computed field widths).
+	This was broken by the first commit of 2012-01-26.
+
+2012-02-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (lookup_sym_lisp1): New function.
+	(do_eval, do_eval_args): New static functions.
+	(eval, eval_args): Become wrappers for do_eval and do_eval_args,
+	respectively.
+	(eval_lisp1, eval_args_lisp1): New static functions.
+	(dwim_loc, op_dwim): Use eval_lisp1 and eval_args_lisp1 instead
+	of eval and eval_args.
+
+	* parser.y (meta_expr): Bugfix: expand the whole dwim expression,
+	rather than its arguments, which are not an expression.
+
+	* txr.1: Updated with notes that dwim really does Lisp-1 style
+	evaluation.
+
+2012-01-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: More color categories. More accurate matching of @ elements.
+
+2012-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Support hex and octal escapes in string and quasiliterals,
+	as the documentation says. Also support an optional trailing ;
+	delimiter in hex escapes.
+
+	* txr.1: Documented.
+
+2012-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Properly show @[...] inside quasiliteral.
+
+2012-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc, op_dwim): Relax the requirement on hash
+	indexing arguments. The default value can be omitted,
+	defaulting to nil.
+
+2012-01-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_begin): Missing type check added, otherwise
+	passing in an object that is not a hash results in corruption
+	or crashing behavior.
+
+	* lib.c (class_check): Improved to a one-step check with a clear
+	message.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 55
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_modplace): Fix warning caught by gcc, but not g++.
+
+	* lib.c (replace_list): Fix code that is valid C++ but not C.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (replace_list): Always convert the input items to a list,
+	even in the trivial case that an empty list is being replaced.
+	Allow a string to be the replacement (split into a list of
+	characters).
+	(replace_str): Bugfix in assignment from vector; wrong index
+	used over source vector.
+	(split_str): If the splitting set is empty, just split the
+	string into characters instead of getting into an infinite loop.
+	(replace_vec): Allow replacement source to be a string.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus, minus): Better wording in error messages.
+
+	* eval.c (dwim_loc): Assignments to string indices and ranges
+	supported. New arguments for this purpose.
+	(op_modplace): Use new dwim_loc interface for returned value.
+	(op_dwim): Support assignment to string ranges.
+	(eval_init): replace_str registered.
+
+	* lib.c (string_extend): If the argument is a number, let it
+	specify the amount by which to extend the string.
+	(replace_str): New function.
+
+	* lib.h (replace_str): Declared.
+
+	* txr.1: Updated.
+
+	* txr.vim: Updated.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (listref, listref_l): Negative indices must have semantics
+	consistent with vecref and ranges.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (cat_str): Throw error if one of the list elements
+	is not a character or string instead of silently returning nil.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: More discussion of ranges.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (format_field): Removed useless use of cat_str (no longer
+	needed because str is already a string). The purpose was to reduce
+	character to strings.
+	(subst_vars): Some of the new logic in format_field must be replicated
+	in the case when format_field is not called because the variable
+	has no modifiers. Lists must be converted to a space-separated string.
+	Bugfix here: occurence of pat and modifiers is not mutually exclusive.
+
+2012-01-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc, dwim_op): Eliminated redundant re-evaluation
+	of range arguments. They are already evaluated since the cons
+	expression is evaluates as part of the dwim arglist.
+	Replaced some open code with function calls to the new listref
+	and listref_l functions.
+	(tostring, tostringp): made extern and moved to lib.c.
+
+	* lib.c (listref, listref_l): New functions.
+	(tostring, tostringp): moved here from eval.c.
+
+	* lib.h (listref, listref_l, tostring, tostringp): Declared.
+
+	* match.c (format_field): Handle index and range references.
+
+	* txr.1: Documented new output variable syntax.
+
+2012-01-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_loc): Handles full responsibility for assigning
+	to list and array ranges.
+	(op_modplace): Pass extra arguments to dwim_loc so it can
+	do the job for ranges. If dwim_loc returns 0, it means
+	that it did everything.
+	(op_dwim): Support list and array ranges.
+
+	* txr.1: Documented.
+
+2012-01-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (zerop): Misspelling in error message.
+
+	* lib.c (sub_list, replace_list, sub_vec, replace_vec):
+	Allow the value t to specify one element past the end, so that t t
+	refers to zero-length sequence just past the end of the array or list.
+	Also, fixed out of bounds memmoves in replace_vec.
+
+2012-01-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New functions registered.
+
+	* lib.c (sub_list, replace_list, vectorp): New functions.
+	(sub_vec): Allow negative indices from end of array.
+	(replace_vec): New function.
+
+	* lib.h (sub_list, replace_list, vectorp, replace_vec): Declared.
+
+	* parser.l (DOTDOT): Scan .. as new token.
+
+	* parser.y (DOTDOT): New token.
+	(expr): New syntax with DOTDOT.
+	(yybadtoken): Handle DOTDOT.
+
+	* txr.vim: Added new functions. Also missing append* and dwim.
+
+	* txr.1: Updated.
+
+2012-01-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim (txr_chr): Fix for highlighting named characters
+	like #\newline.
+
+2012-01-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dwim_s): New symbol variable.
+	(dwim_loc, op_dwim): New static functions.
+	(op_modplace): Support assignment to dwim forms
+	with the help of dwim_loc.
+	(expand_place): Handle dwim places.
+	(eval_init): Initialize dwim_s. Register dwim operator
+	in op_table.
+
+	* eval.h (dwim_s): Declared.
+
+	* lib.c (chr_str, chr_str_set): Allow negative indices to index
+	backwards from end of string.
+	(vecref, vecref_l): Allow negative indices to index from
+	rear of array.
+	(obj_print, obj_pprint): Render (dwim ...) forms as [...].
+
+	* parser.l: Peoduce new METABKT token type for @[,
+	and '[', ']' tokens.
+
+	* parser.y (METABKT): New token. %type declaration for '['.
+	(list): Support square-bracket style of list, translated
+	into dwim form.
+	(meta_expr): Support @[...] variant.
+	(yybadtoken): Handle METABKT in switch.
+
+	* txr.1: Documented [...] syntax and dwim operator.
+
+	* txr.vim: Updated.
+
+2012-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 54
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (help): Added missing help for w command.
+	(debug): In backtrace, show the renaming pairs for unbound
+	variables (up_p_a_pairs) if they are present.
+
+	* debug.h (debug_begin): Renamed to debug_frame.
+
+	* eval.c (eval): Wrap debug_begin/debug_end around function dispatch,
+	so TXR Lisp functions are included in backtraces.
+
+	* match.c (h_fun): Follow rename of debug_begin to debug_frame.
+	Pass in evaluated args, not the original ones.
+	(v_fun): Likewise.
+
+	* unwind.c (uw_push_debug): bindings argument renamed to env.
+	Bugfix: args argument was being assigned to ub_p_a_pairs.
+
+	* unwind.h (struct uw_debug): Member bindings renamed to env.
+	(uw_push_debug): Declaration updated.
+
+2012-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (last_command): Do not initialize with lit();
+	this is not a constant expression in C.
+	(debug): Handle the situation here.
+
+2012-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (help): Filled in.
+	(debug): Some commands changed due to duplicates.
+
+2012-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_fun): Removing all debugging instrumentation.
+	(match_files): Moving debug_check out of directive case so
+	it covers all forms handled by loop. All this makes the n
+	command in the debugger work better: not skip over
+	function calls or horizontal material.
+
+2012-01-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improved debugging. Debug nesting depth counter maintained
+	and used for next/step/finish stepping.
+
+	* Makefile (OBJS): debug.o moved to OBJS-y or OBJS-.
+	(OBJS-y, OBJS-): New variables.
+	$(PROG): Depends on OBJS-y also.
+	clean: clean $(OBJS-y).
+	depend: include $(OBJS-y) in dependency generation.
+
+	* configure: Underscores and dashes are interchangeable in
+	configure variables.
+	(yaccname_given, yacc_given): Default value is y, not yes.
+	(debug_support): New config variable.
+	(CONFIG_DEBUG_SUPPORT): New config.h symbol.
+
+	* debug.c (debug_depth): New global variable.
+	(debug_block_s): New symbol variable.
+	(next_depth): New static variable.
+	(debug): Renamed some commands. Introduced separate next, step
+	and finish.
+	(debug_init): debug_block_s initialized.
+
+	* debug.h (debug_depth, debug_block_s): Declared.
+	(debug_enter, debug_leave, debug_return): New macros.
+	(debug_check, debug_init): Conditionally defined based on
+	if this is a debug build.
+
+	* dep.mk: Regenerated.
+
+	* eval.c (eval): Instrumented with debug_enter, debug_leave,
+	debug_return.
+
+	* match.c (match_line, v_fun, match_files): Likewise.
+
+	* txr.c (txr_main): Bail if -d or --debug used in build
+	that lacks debug support.
+
+2012-01-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (last_command): Initialize to empty string rather
+	than nil, otherwise hitting enter tries to repeat the nil command.
+	(show_bindings): New function. Prints all levels of bindings.
+	(debug): Flip the corresponding print flags after printing the current
+	form or data, so they are not printed for every prompt.
+	On EOF from standard input, substitute the q command.
+	If enter is hit and there is no last command, just re-print the prompt.
+	The v command uses show_bindings to dump the environment.
+
+	* eval.c (eval): When calling debug_check, pass the env objects, rather
+	than the bindings it contains.
+
+2012-01-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (car_l, cdr_l): Bugfix: do not call the lazy cons
+	force function if it is already nil, and set it to nil afterward.
+
+2012-01-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Make lazy_appendv function
+	available as append*.
+
+	* txr.1: Documented.
+
+2012-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Before releasing 53, there is this.
+
+	* eval.c (c_var_mark): Bugfix: we cannot use cptr_get from
+	within the garbage collector because of its type check.
+	Bugfix: synchronize the shadow binding with the variable's
+	current contents so we don't hang on to a stale object.
+
+2012-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 53
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2012-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	TXR Lisp regression in C global variables.
+
+	* eval.c (struct c_var): New struct type.
+	(lookup_var, lookup_var_l): cptr type bindings now point to a struct
+	c_var, which has to be handled properly here.
+	(c_var_mark): New static function.
+	(c_var_ops): New static struct.
+	(reg_var): Register variables using struct c_var to provide
+	a pointer to the location and a cached cons that can be
+	returned as a binding.
+
+2012-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (each_s, each_star_s, collect_each_s, collect_each_star_s):
+	New symbol variables.
+	(op_each): New static function.
+	(expand): Handle the four new operators.
+	(eval_init): Intern new symbols, register new operators.
+
+	* txr.1: Documented each, each*, collect-each and collect-each*.
+
+	* txr.vim: Updated.
+
+2012-01-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): list_str registered.
+
+	* lib.c (list_str): New function.
+
+	* lib.h (list_str): Declared.
+
+	* txr.1: Doc stub section created.
+
+	* txr.vim: Updated.
+
+2012-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (generate): Bugfix: do not call gen_fun before
+	testing while_pred.
+
+2012-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (tostring, tostringp): New static functions.
+	(eval_init): New functions registered.
+
+	* txr.1: Stub sections created.
+
+	* txr.vim: Updated.
+
+2012-01-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Spat of new features having to do with lazy processing.
+
+	* eval.c (prog1_s, gen_s, generate_s, delay_s, promise_s): New symbol
+	variables.
+	(eval_prog1, op_prog1, expand_gen, expand_delay): New static functions.
+	(expand): Handle gen and delay.
+	(lazy_mapcar_func, lazy_mapcar, lazy_mapcarv_func, lazy_mapcarv,
+	lazy_mappendv): New static functions.
+	(rangev_func, rangev, generate_func, generate, repeat_infinite_func,
+	repeat_times_func, repeatv, force): New static functions.
+	(eval_init): New operators and functions interned.
+	lazy-flatten renamed to flatten*.
+
+	* lib.c (null_f): New global variable.
+	(ltail, lazy_appendv): New functions.
+	(lazy_appendv_func): New static function.
+	(obj_init): null_f protected and initialized.
+
+	* lib.h (null_f, ltail, lazy_appendv): Declared.
+
+	* txr.1: Documented.
+
+	* txr.vim: Updated.
+
+2012-01-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Non-broken way to achieve intent of previous commit.
+
+	* eval.c (subst_vars): Do not evaluate modifiers
+	as an argument list locally. Pass form-evaluating
+	function to format_field.
+
+	* match.c (format_field): Modified to accept new argument,
+	a one-argument function for reducing a form to a value.
+	Error checking for invalid modifiers made stricter.
+	(subst_vars): Do not evaluate modifiers as an argument
+	list. Pass form-evaluating function to format_field.
+
+	* match.h (format_field): Declaration updated.
+
+2012-01-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (subst_vars): Evaluate the
+	modifiers, so expressions can be used.
+
+	* match.c (subst_vars): Likewise,
+	but using txeval.
+
+2012-01-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 52
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated. Wrong December dates fixed.
+
+2012-01-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (fuzz_s): New symbol variable.
+	(v_fuzz): New static function.
+	(syms_init): fuzz_s initialized.
+	(dir_tables_init): v_fuzz entered into v_directive_table.
+
+	* txr.1: Documented @(fuzz).
+
+2012-01-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_gather): Implemented until/last clause.
+
+	* parser.y (gather_parts, additional_gather_parts): New nonterminals.
+	(gather_clause): Syntax refactored for until/last clause.
+
+	* txr.1: Updated.
+
+2012-01-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Fix regression introduced in
+	2011-12-29 commit. We can't use mod_s, because the module
+	which sets up that variable is not yet initialized.
+
+2012-01-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Make C globals in TXR Lisp properly assignable, so that for instance
+	assigning *stdout*, it really overwrites the underlying C variable.
+
+	* eval.c (lookup_var): Handle new kind of toplevel binding.
+	If the hash value is a cptr, it points to a val storage location.
+	(lookup_val_l): New function.
+	(op_modplace): Get location of variable using lookup_val_l
+	rather than assuming there is a cons-based binding.
+	(reg_var): Argument changed to val * pointer.
+	Register the variable as a cptr referencing the location.
+	(eval_init): reg_var calls pass address of each global.
+
+	* eval.h (lookup_var_l): Declared.
+
+2012-01-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New gensym function registered.
+
+	* lib.c (gensym_counter): New variable.
+	(gensymv): New function.
+	(obj_init): Initialize gensym_counter.
+
+	* lib.h (gensym_counter, gensymv): Declared.
+
+2011-12-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (counter_k): New keyword symbol variable.
+	(do_output_line): Process new :counter argument of rep.
+	(do_output): Ditto, for repeat.
+	(syms_init): Intern new keyword symbol.
+
+	* match.h (counter_k): Declared.
+
+	* parser.l (REPEAT, REP): Lexical syntax changed to
+	allow arguments.
+
+	* parser.y (repeat_rep_helper): Takes extra argument, representing
+	the repeat/rep args. This is inserted into the second position
+	of the output list.
+	(repeat_clause, rep_elem): Extract repeat/rep arguments and
+	pass to repeat_rep_helper.
+	(yybadtoken): Do not put quotes around the word "number".
+
+	* txr.1: Updated.
+
+2011-12-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	New functionality: mod and modlast directives in repeat and rep.
+
+	* eval.c (eval_init): Use new symbol variable mod_s instead
+	of calling intern.
+
+	* match.c (mod_s, modlast_s): Symbol variables defined.
+	(do_output_line): mod and modlast directives implemented under rep.
+	(do_output): likewise under repeat.
+	(syms_init): Initialize new symbol variables.
+
+	* match.h (mod_s, modlast_s): Declared.
+
+	* parser.l (MOD, MODLAST): Parse new token types.
+
+	* parser.y (MOD, MODLAST): New tokens.
+	(repeat_parts_opt, rep_parts_opt): New syntax.
+	(repeat_rep_helper): Handle mod and modlast syntax.
+
+	* txr.1: Updated.
+
+	* txr.vim: Updated.
+
+2011-12-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (repeat_rep_helper): Bugfix. Circular lists
+	were being created here when clauses of the same kind appear multiple
+	times. The problem is that append2 no longer copies the second list,
+	which the code was relying on it to do.
+
+2011-12-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Useless sentence under reduce-left and reduce-right removed.
+	Missing Description headings added.
+
+2011-12-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Updated for recent man page changes.
+
+2011-12-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 51
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Capitalize TXR where it makes sense.
+	Introductory text rewritten.
+
+2011-12-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (LOG_MATCH): Use < in format directive instead of -.
+
+	* rand.c (random): Add back missing declaration.
+
+2011-12-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (quasi_item): Switch from var to o_var. This fixes
+	cases like `@a@(foo)@b` where foo was being translated
+	to (foo) rather than (sys:expr foo).
+
+2011-12-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/shrink-mpi-int (mpi_int): Fixed terrible bug in this
+	patch, resulting in an insufficient bit field width for representing
+	the allocation size of the MPI integer on 32 bit platforms.
+
+2011-12-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (make_state): Use ANSI C syntax for prototyped function of no
+	arguments. This snuck through due to working with a C++ compiler.
+	(random): Fixed unused variable warning that happens on 32-bit-pointer
+	platforms.
+	
+2011-12-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Formatting fixes.
+
+2011-12-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* dep.mk: Overdue update.
+
+2011-12-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_next): Change flatten to lazy_flatten in the
+	correct place. In the previous commit I did it in the code that handles
+	the obsolescent :var syntax.
+
+2011-12-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New function interned.
+
+	* lib.c:x (lazy_flatten_scan, lazy_flatten_func): New static functions.
+	(lazy_flatten): New function.
+			
+	* lib.h (lazy_flatten): Declared.
+
+	* match.c (v_next): Use lazy_flatten instead of flatten for
+	processing a :list source. This means that @(next :list ...)
+	can be used to process infinite lazy lists.
+
+	* txr.1: Documented lazy-flatten.
+
+2011-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (rand32): Moved.
+	(make_random_state): After initializing, retrieve eight
+	random numbers to clear pathological initial behavior
+	leading to duplicate values.
+
+2011-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (highest_bit): Changing to external linkage.
+
+	* arith.h (highest_bit): Declared.
+
+	* rand.c (random): Rewrote using different algorithm which
+	ensures even distribution, and avoids doing a bignum mod
+	operation.
+
+2011-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 50
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (memql): New function.
+	(some_satisfy): Return the first non-nil result, rather than t.
+	(all_satisfy): Return the value of the last item, if all items
+	are processed.
+
+	* lib.h (memql): Declared.
+
+	* txr.1: Documented memq, memql, memqual, tree-find, some,
+	all, none, eq, eql and equal.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented copy-list, reverse, nreverse, ldiff and flatten.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented reduce-left and reduce-right.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35010
+
+	* match.c (extract_bindings): Make sure there are no duplicate
+	variables among the extracted bindings. This is needed because
+	of the other changes.
+	(do_output_line, do_output): In handling the rep/repeat directives,
+	append the original bindings to the extracted set bindings for the
+	variables which just occur in the clause, so that Lisp code can see all
+	of the variables.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): If width is specified for ~s or ~a, and
+	the object is not a string or number, then print it to a string
+	and treat it as a string, adjusting it within the field.
+	Also, do not simply abort on an unknown format directive
+	but throw a proper exception.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Left-adjusted field is now  specified
+	using < rather than '-'. The +, space and leading 0 are
+	specified on the precision, not the width.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (random): Fix for 64 bit fixnums: stick two random numbers
+	together. Otherwise for fixnum moduli, we get only a 32 bit number no
+	matter what the modulus is.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (vformat): Combine ~a and ~s cases, so numbers and
+	strings are printed the same way under ~s and ~a.  The only difference
+	is printing other kinds of objects.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35026
+
+	* stream.c (format_num): New argument: sign character.
+	Rewrote to handle precision, width, zero padding and
+	leading sign similarly to printf.
+	(vformat): New syntax accepted: a space or + before
+	the width specifies that a positive sign is to be
+	explicitly written as a space or + character.
+	Pass one more argument to vormat_num calls.
+	Bugfix: go back to vf_init state after processing ~~.
+
+2011-12-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35136 and cleanup.
+
+	* arith.c (plus, minus, mul, gt, ge, lt, le, exptmod, gcd): Remove
+	trailing abort; we already marked uw_throwf as noreturn. This hack
+	should not be needed in functions where the last statement is a throw.
+	(trunc, expt): Repeated error case handled in one place. Temp variable
+	used to avoid two calls to mp_clear. Call to abort removed.
+	(mod): Repeated error handed in one place. Plugged memory leak
+	by moving throw past mp_clear calls. Call to abort removed.
+	(isqrt): Repeated error case handed in one place.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Fixed to char literal syntax.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/bit-search-optimizations (s_highest_bit):
+	It will take days to completely wipe the egg off my face.
+	I forgot to fix this code for unsigned integers before
+	pasting it into MPI.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (normalize): Linkage changed to extern.
+
+	* arith.h (normalize): Declared.
+
+	* rand.c (random): Bugfix: normalize the bignum before returning it.
+
+	* txr.1: Doc stubs for PRNG functionality.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c: Added comment about source of algorithm.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* rand.c (random): Bugfix: not building up sufficiently large bignums.
+	Work properly when mp_digit is smaller than 32 bits.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (OBJS): new object file, rand.o.
+
+	* eval.c: Includes rand.h header.
+	(eval_init): New variable and functions from rand module registered.
+
+	* lib.c: Includes rand.h header.
+	(init): Call rand_init.
+
+	* rand.c: New file.
+
+	* rand.h: New file.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35139
+
+	Better fix.
+
+	* parser.y (YYEOF): If YYEOF is not defined, define it as zero.
+	(yybadtoken): Undo previous changes: do not test for zero.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35139
+
+	* parser.y (yybadtoken): The current token (yychar) is 0 on byacc
+	rather than YYEOF or YYEMPTY, so we have to handle that.
+
+2011-12-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (distclean): use rm -rf on mpi directory.
+
+2011-12-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Test case for bug #35137
+
+	* tests/007/except-2.expected: New file.
+
+	* tests/007/except-2.txr: New file.
+
+2011-12-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New function registered.
+
+	* lib.c (cat_vec): New function.
+
+	* lib.h (cat_vec): Declared.
+
+	* txr.1: Documentation stub.
+
+2011-12-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #35137
+
+	* unwind.c (uw_unwind_to_exit_point): When jumping to a catch frame,
+	do not mark it invisible.
+
+	* unwind.h (uw_catch): Flip the matches to nil so that this catch
+	frame can no longer be identified as an unwind point by uw_throw,
+	and thus will not be re-entered for the purposes of handling
+	an exception. It remains visible for the purposes of running the
+	clean up code.
+	(uw_unwind): Prior to executing cleanup forms, flip the visibility
+	to 0. This means that the frame will no longer be re-entered
+	for any reason.
+
+2011-12-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Streamlining exception handling macros a little bit.
+
+	* eval.c (op_unwind_protect): Use uw_simple_catch_begin,
+	and remove the uw_catch (exsym, exvals) clause. Put
+	explicit braces around the unwind code even though it
+	is only one statement.
+
+	* match.c (do_txeval): Got rid of empty uw_unwind clause.
+	This is not needed any longer.
+	(v_try): Got rid of explicit uw_do_unwind calls. 
+
+	* unwind.h (uw_simple_catch_begin): New macro.
+	(uw_do_unwind): Macro removed.
+	(uw_catch): Added goto uw_unwind_label at the front.
+	This way if the previous clause falls through,
+	control goes to the unwind logic.
+	(uw_unwind): Got rid of initial break. Previous
+	clause should fall through to unwind logic,
+	whether it is the main clause, or one of the catches.
+	(uw_catch_end): Default case aborts, because
+	we don't expect this.
+
+2011-12-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Critical regression. Hash lookup was crashing on some platforms
+	due to negative hashing values being reduced modulo table size
+	to a negative array index.
+
+	* hash.c (equal_hash, eql_hash): Ensure
+	that value returned is in the range [0,NUM_MAX].
+	(hash_obj): Unused function removed.
+	(cobj_hash_op): Use hashing similar to eql hash for
+	other kinds of references.
+	(hash_eql, hash_equal): Removed bogus % NUM_MAX reduction.
+
+	* hash.h (hash_obj): Declaration removed.
+
+2011-12-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New functions registered as intrinsics.
+
+	* lib.c (copy_vec, sub_vec): New functions.
+
+	* lib.h (copy_vec, sub_vec): Declared.
+
+	* txr.1: Stub sections created.
+
+2011-12-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 049
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (subst_vars, op_quasi_list, expand_quasi): New static
+	functions.
+	(expand): New case for quasiliterals.
+	(eval_init): Register quasi literal as special operator.
+
+	* match.c (format_field): Linkage changed to external.
+
+	* match.h (format_field): Declared. Declarations rearranged.
+
+2011-12-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bindings_helper): Fix format arguments.
+	(eval_init): Registered new functions: symbol-function,
+	func-get-form, func-get-env, functionp, interp-fun-p.
+
+	* lib.c (nappend2, getplist_f, improper_plist_to_alist):
+	tail variable renamed to avoid clash in macro.
+	(func_get_form, func_get_env, interp_fun_p): New functions.
+
+	* lib.h (func_get_form, func_get_env, interp_fun_p): Declared.
+	(list_collect): Fix macro not to throw error, but handle the case.
+
+	* match.c (vars_to_bindings, extract_bindings): tail variable
+	renamed to avoid clash in macro.
+
+	* txr.1: Documentation stubs.
+
+2011-12-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (equal_hash): Eliminating displacement from character
+	hashes. Simplifying some code.
+	(eql_hash): Handle fixnums, characters and literals specially,
+	rather than hashing all value types the same way. The shift
+	applicable for object pointers causes adjacent integers to clash.
+
+2011-12-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_vars): Bugfix: use expand_forms rather than
+	expand on a list of forms.
+
+2011-12-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: iskeyword updated.
+
+2011-12-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (appendv): bugfix: wrong way test.
+	(vector_list): Wrong zero used, resulting in vector(nil) being called.
+
+2011-12-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): not added as synonym for null.
+
+	* lib.c (copy_list): Use list_collect_append rather than
+	list_collect_terminate.
+	(append2, appendv): Simplified using new list_collect_append.
+	(nappend2): Simplified using new list_collect_nconc.
+
+	* lib.h (list_collect): Added check for accidental usage
+	of list_collect after list_append, since PTAIL has different
+	semantics.
+	(list_collect_nconc, list_collect_append):  Semantics fixed so that
+	append collecting works more like the Common Lisp append function,
+	allowing trailing atoms or a lone atom. The meaning of PTAIL is
+	changed, however.  Now PTAIL actually tracks the head of the most
+	recently appended segment. Each append operation has to first
+	traverse the previously added piece to get to the end.
+
+	(list_collect_terminate): Macro removed.
+
+	* match.c (v_gather): Removed useless use of list_collect_terminate.
+
+	* parser.y: Some headers added that are needed by list_collect.
+
+	* txr.1: Documented append, list, atom, null, not, consp, make-lazy-cons,
+	lcons-fun, listp, proper-listp, length-list,  mapcar, mappend, and apply.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	@# comments are becoming obsolescent. @# comments
+	can now be used. Within nested forms,
+	Lisp-compatible ; comments are suported.
+
+	* parser.l: Support @# and ; comments.
+
+	* txr.1: Documentation updated.
+
+	* txr.vim: Updated.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (car, cdr): Set the lazy cons function to nil
+	after calling it.
+	(rplacd): Do not set the lazy cons function to nil
+	in.
+
+	* txr.1: Documented a bunch of functions.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): Removed registration for vec_get_fil.
+	Renamed vec_set_fill to vec-set-length.
+
+	* hash.c (equal_hash): vec_fill to vec_length name change.
+	(hash_grow, make_hash): No need to call vec_set_length.
+
+	* lib.c (equal, vecref, vec_push, length_vec, list_vector,
+	obj_print, obj_pprint): vec_fill to vec_length name change.
+	(vector): Argument now represents actual length, not just allocated
+	size.
+	(vec_get_fill): Function removed; did exactly the same thing
+	as length_vec.
+	(vec_set_fill): Function renamed to vec_set_length.
+	(vector_list): Allocate a 0 length vector initially.
+
+	* lib.h (enum vecindex): member changes name from vec_fill
+	to vec_length.
+	(vector): Parameter name changed.
+	(vec_set_fill): Redeclared.
+	(vec_get_fill): Declaration removed.
+
+	* txr.1: Doc stubs updated.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (car, cdr): Semantics fix for lazy conses.
+	Ignore the return value of the lazy cons function: do not
+	return nil if the function returns nil.
+	This useless behavior was a source of inconvenience in lazy
+	cons programming, requiring the lazy function to return
+	non-nil in addition to installing the car and cdr fields.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (abso): broken for fixnums.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Highlight hash prefix and quote.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_dohash): Esbatlish anonymous block.
+
+	* txr.1: Finished documenting special operators.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Fix empty NAME section.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (minus): Allow difference between characters.
+
+2011-12-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus, minus, gt, lt, ge, le): Handle character operands.
+
+	* eval.c (eval_init): New functions interned.
+
+	* lib.c (num_chr, chr_num): New functions.
+
+	* lib.h (num_chr, chr_num): Declared.
+
+	* txr.1: Documentation stubs.
+
+2011-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 048
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (exptmod, gcd): New functions.
+
+	* eval.c (eval_init): New functions registered as intrisics.
+
+	* lib.h (exptmod, gcd): Declared.
+
+	* txr.1: Documentation stubs added.
+
+2011-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (evenp, oddp): New functions.
+
+	* eval.c (eval_init): New functions registered as intrinsics.
+
+	* lib.h (evenp, oddp): Declared.
+
+	* txr.1: Documentation stub updated.
+
+2011-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (highest_bit): Linkage changed to static.
+	(abso, isqrt): New functions.
+	(isqrt_fixnum): New static function.
+
+	* eval.c (eval_init): Registered abs, sqrt and numberp instrinsics.
+
+	* lib.c (numberp): New function.
+
+	* lib.h (numberp, abso, isqrt): Declared.
+
+	* mpi-patches/series: New patch added.
+
+	* mpi-patches/faster-square-root: New patch added.
+
+	* txr.1: Documentation stubs for new functions.
+
+2011-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (expt): Fix broken bignum x fixnum combination.
+
+2011-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (repatch): New phony target.
+	(distclean): Remove mpi directory.
+
+2011-12-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Patch to shrink mpi-int to three words on 32 bit platforms,
+	so that obj_t stays four pointers wide.
+
+	* mpi-patches/series: New patch added.
+
+	* mpi-patches/shrink-mpi-int: New file.
+
+2011-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/bit-search-optimizations (s_highest_bit): Added static
+	storage class specifier.
+
+	* mpi-patches/fix-mult-bug (s_mp_sqr): More braindamage found in MPI.
+	This function performs additions and multiplication mp_digit,
+	expecting a mp_word precision result without casting. This function
+	is needed for exponentiation.
+
+2011-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Git rid of some some loops in MPI where it is searching for
+	the highest bit, replacing them with an adapation of the
+	bit searching function used in arith.c.
+
+	* mpi-patches/series: Patch added.
+
+	* mpi-patches/bit-search-optimizations: New file.
+
+2011-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (expt): New function.
+
+	* eval.c (eval_init): Registering new intrinsic functions,
+	reduce-left, reduce-right and expt.
+
+	* lib.c (minusv): Return one instead of num(1).
+	(exptv, reduce_right): New functions.
+
+	* lib.h (expt, exptv, reduce_right): Declared.
+
+	* txr.1: Blank sections for new functions.
+
+2011-12-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/fix-mult-bug: One more flaw discovered in
+	s_mp_mul_d and added to patch. This one caused malloc corruption and
+	crashes, because the incorrect arithmetic causes the function
+	to think that the multiplication will not be needing another
+	digit, but then there is a carry out which does spill into
+	a new digit.
+
+	* mpi-patches/series: Arg! Somehow the patch fix-bad-shift
+	went missing from the series file, even though the patch
+	itself is in the GIT repository.
+
+2011-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 047
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (zerop, gt, lt, ge, le): Functions from lib.c reimplemented
+	with bignum support.
+
+	* eval.c (eval_init): Added bignump and zerop as intrinsic function.
+	Renamed numberp to fixnump.
+
+	* lib.c (zerop, gt, lt, ge, le): Functions removed.
+	(numeq): Unused function removed.
+
+	* lib.h (numeq): Declaration removed.
+
+	* txr.1: Sections for zerop and bignump created. Changed reference
+	to numberp to fixnump.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (plus, mul): Plugged mpi_int memory leaks.
+	(trunc): Plugged memory leaks. Straightened out semantics
+	with negative modulus. (Residue comes out negative).
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (trunc): Error messages prefixed with trunc:.
+	(mod): New function, reimplementation of removed mod from lib.c.
+
+	* lib.c (mod): Function removed.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bignum division implemented. More portability bugs found in MPI:
+	code like 1 << n, where n exceeds the width of the type int.
+
+	* arith.c (trunc): New function, reimplementation of removed
+	trunc from lib.c.
+
+	* lib.c (trunc): Removed.
+
+	* mpi-patches/fix-bad-shifts: New file.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c (ABS): New macro.
+	(plus, minus): Bugfix: must not pass signed values to mp_add_d and
+	mp_sub_d functions.
+	(mul): Must not pass signed value to mp_mul_d.  Also, fixed type check
+	on wrong argument in the (TAG_PTR, TAG_NUM) case.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	Removing this crutch; it's not that useful.
+
+	* arith.txr: File removed.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c: Regenerated.
+
+	* arith.txr (normalize): Bugfix: was not turning +/- NUM_MAX bignums
+	into fixnums.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c: Regenerated.
+
+	* arith.txr (highest_bit): Missing #else added, fixing
+	SIZEOF_PTR == 4 case.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c: Regenerated.
+
+	* arith.txr (highest_bit): Oops, half the logic for
+	the 64 bit case was missing due to to a cut and paste mistake.
+
+2011-12-11  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c: Regenerated.
+
+	* arith.txr (highest_bit): New function.
+	(mul): Use highest_bit instead of shift based algorithm.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim (txr_atat): New match. The @@ sequence is recognized
+	properly and highlighted.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bignum support in mult function.
+
+	* arith.c: Regenerated.
+
+	* arith.txr (CNUM_BIT): New constant.
+	(bignum, bignum_dbl_ipt): New static functions.
+	(@{add-fname}): Use bignum function.
+	(mul): New functions, rewrite of mul from lib.c.
+
+	* lib.c (mul): Function removed.
+
+	* mpi-patches/add-mp-set-intptr (mp_set_intptr): Revised patch.
+	Local variable v should be int_ptr_t not unsigned long.
+	Also, the mp_set interface doesn't set the sign; it's an unsigned
+	interface. We must do that ourselves.
+
+	* mpi-patches/fix-mult-bug: The main multiplication function is
+	also broken in the same way, requiring the cast.
+
+	* mpi-patches/mpi-set-double-intptr: Fixed use of wrong type for
+	local variable v.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/mpi-set-mpi-word: Bugfix and refresh.
+
+	* mpi-patches/mpi-set-double-intptr: New file.
+
+	* mpi-patches/series (mpi-set-double-intptr): Patch added.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: add to config.h the type double_intptr_t, which
+	is twice the size of intptr_t. It may not be available, so
+	there is a HAVE_ macro to detect it.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New functions added as intrinsics.
+
+	* hash.c (hash_eql, hash_equal): New external functions.
+
+	* hash.h (hash_eql, hash_equal): Declared.
+
+	* txr.1: Sections added.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* mpi-patches/add-mp-hash: Rewrote mp_hash to only hash enough
+	low-order bit material from the bignum to fill an unsigned long.
+	We don't need to walk the entire bignum. If the low order
+	digit of the bignum is at least as large as an unsigned long,
+	we just take that as the hash, otherwise we take enough of the
+	digits to fill an unsigned long. For negative numbers, we just
+	invert the bits of the hash.
+
+	* mpi-patches/add-mpi-toradix-with-case: Refreshed.
+
+	* mpi-patches/fix-mult-bug: Refreshed.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (mulv): Recognize cases to eliminate a wasteful mul call
+	with an initial element of 1.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (plusv): Recognize cases to eliminate a wasteful plus call
+	with an initial element of zero.
+
+2011-12-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* arith.c: File is now generated using TXR.
+	(NOOP): New macro.
+	(plus): Use NOOP macro.
+	(minus, neg): Function moved here from lib.c and rewritten
+	for bignum support.
+
+	* lib.c (minus, neg): Functions removed.
+
+	* arith.txr: New file.
+
+2011-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Fix patching without quilt.
+
+2011-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Build and pass test suite on Cygwin.
+
+	* configure (longlong, ulonglong, superlong, usuperlong): Initialize
+	these variables so that if the detection tests fail, the script
+	does not access unbound variables.
+	Avoid adding junk like .bss.* into config.h.
+
+	* mpi-patches/config-types: Fixed wrong use of nonexistent
+	SIZEOF_LONG_T.
+
+2011-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	(Applies to previous commit.)
+
+	* mpi-patches/config-types: Added missing definitions
+	of MP_DIGIT_SIZE in two cases.
+
+2011-12-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bignum support, here we go!
+
+	Bignums, based on Michael Fromberger's MPI library, are integrated
+	into the input syntax, stream output, equality testing, the garbage
+	collector, and hashing.
+	
+	The plus operation handles transitions between fixnums and bignums.
+	Other operations are still fixnum only.
+
+	* Makefile (CFLAGS): Add mpi directory to include file search.
+	(OBJS): Include new arith.o module and all of MPI_OBJS.
+	(MPI_OBJS, MPI_OBJS_BASE): New variables.
+
+	* configure (mpi_version, have_quilt, have_patch): New variables.
+	Script detects whether patch and quilt are available. Unpacks
+	mpi library, applies patches. Detects 128 bit integer type.
+	Records more information in config.h about the sizes of types.
+
+	* dep.mk: Updated.
+
+	* depend.txr: Make work with paths that have directory components.
+
+	* eval.c (eval_init): Rename of nump to fixnump.
+
+	* gc.c (finalize, mark_obj): Handle BGNUM case.
+
+	* hash.c: (hash_c_str): Changed to return unsigned long
+	instead of long.
+	(equal_hash): Handle BGNUM case.
+	(eql_hash): Handle bignums with equal-hash, but other
+	objects as eq.
+
+	* lib.c (num_s): Variable renamed to fixnum_s.
+	(bignum_s): New symbol variable.
+	(code2type): Follow rename of num_s. Handle BGNUM case.
+	(typeof): Follow rename of num_s.
+	(eql): Handle bignums using equal, and other types using eq.
+	(equal): Handle BGNUM case.
+	(chk_calloc): New function.
+	(c_num): Wording change in error message: is not a fixnum.
+	(nump): Renamed to fixnump.
+	(bignump): New function.
+	(plus): Function removed, reimplemented in arith.c.
+	(int_str): Handle integers which are too large for wcstol
+	using bignum conversion. Base 0 is no longer passed to
+	wcstol but converted to 10 because the special semantics
+	for 0 would be inconsistent for bignums.
+	(obj_init): Follow rename of num_s. Initialize bignum_s.
+	(obj_print, obj_pprint): Handle BGNUM.
+	(init): Call arith_init.
+
+	* lib.h: Includes "mpi.h", as an exception to the project rule against
+	headers including headers.
+	(enum type): New enumeration member, BGNUM.
+	(struct bignum): New struct type.
+	(union obj): New member bn.
+	(mp): New inline function.
+	(num_s): Redeclared as fixnum_s.
+	(bignum_s, chk_calloc, bignump): Declared.
+	(nump): Redeclared as fixnump.
+
+	* match.c (h_var, h_line, h_skip, h_coll, h_fun, format_field, v_skip,
+	v_freeform, v_collect, v_match_files): Follow nump to fixnump rename.
+
+	* parser.l (NUM): New token type. Split up the parsing of identifiers
+	and numbers once again. But since every number is also lexically also
+	lexically an identifier, we put the action first. The action for
+	making numbers handles bignums. It produces object numbers, not
+	C numbers (change in yystype union).
+
+	* parser.y (%union): num changes type from cnum to val.
+
+	* stream.c (vformat): Handle bignums in numeric conversions.
+
+	* arith.c: New file.
+
+	* arith.h: New file.
+
+	* mpi-1.8.6.tar.gz: New file.
+
+	* mpi-patches/add-mp-hash: New file.
+
+	* mpi-patches/add-mp-set-intptr: New file.
+
+	* mpi-patches/add-mpi-toradix-with-case: New file.
+
+	* mpi-patches/config-types: New file.
+
+	* mpi-patches/export-mp-eq: New file.
+
+	* mpi-patches/fix-mult-bug: New file.
+
+	* mpi-patches/fix-warnings: New file.
+
+	* mpi-patches/series: New file.
+
+	* mpi-patches/use-txr-allocator: New file.
+
+2011-12-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	C++ maintenance.
+
+	* eval.c (and_s, or_s): Redundant variables removed.
+
+	* match.h (do_s): extern storage class specifier added.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_defun): Transform a function body by inserting
+	a named block around it, thereby imitating a Common Lisp feature.
+	(op_for): Establish an anonymous block around the loop body,
+	test form and increment forms.
+
+	* txr.1: Documented named block in defun. Documented for and for *.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Updated with all operators and functions.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: flip operator documented. Bad syntax for pop fixed.
+	Blank section for list-vector function added.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_modplace): If the operator is push, then reverse
+	the arguments. We want (push item list) for compatibility with CL.
+	(expand): Bugfix: some of the cases were constructing new
+	forms using unexpanded pieces from the original form.
+	Added separate case for push, which handles the reversed arguments.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (debug): Fix regression: repeat last command by hitting
+	Enter stopped working.  This was broken by recent bugfixes in the
+	string splitting functions, which introduced a semantics change.
+
+	* eval.c (flip_s, vecref_s): New symbol variables.
+	(op_modplace): New places (vecref ...) and (flip ...). Bugfix: dec
+	operator was incrementing.
+	(expand_place): Handle vecref and flip. Bugfix: pop has no
+	third argument and so is now handled by the same case as flip.
+	Bugfix: if a modify form has no third argument, then do not
+	resynthesize it with a nil third argument.
+	(eval_init): Initialize new symbol variables.
+	Register new flip operator. Register new list_vectory function
+	as intrinsic.
+
+	* lib.c (rplacd): When modifying the cdr field of a lazy cons,
+	then lapse the lazy function to nil! This is needed by user-defined
+	lazy conses, and it makes sense to do it this way rather than
+	put in some explicit interface.
+	(list_vector): New function.
+
+	* lib.h (list_vector): Declared.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (lookup_var, lookup_fun): Reversing assoc arguments.
+	(eval_init): New intrinsics.
+
+	* hash.c (struct_hash): assoc_fun parameters reversed.
+	(gethash, gethash_f, gethash_n): Likewise.
+
+	* lib.c (assoc, assq): Reversing parameters.
+	(find_package, acons_new, acons_new_l, aconsq_new): Reversing
+	arguments to assoc adn assq.
+
+	* lib.h (assoc, assq): Declarations updated.
+
+	* match.c (dest_set, dest_bind, h_var, h_coll, h_parallel, h_fun,
+	subst_vars, do_txeval, v_next, v_parallel, v_gather, v_collect,
+	v_flatten, v_cat, v_output, v_filter, f_fun, match_funcall):
+	Reversing arguments to assoc.
+
+	* unwind.c (uw_get_func, uw_exception_subtype_p, uw_register_subtype):
+	Reversing arguments to assoc.
+
+	* txr.1: Blank sections created for new functions.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Blank sections created for character functions.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New functions registered as intrinsics.
+
+	* lib.c (chr_toupper, chr_tolower): New functions.
+
+	* lib.h (chr_toupper, chr_tolower): New functions declared.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: In the CHRLIT state, return a nonblank character as an
+	IDENT token. This allows for character literals like #\$.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): New character functions registered.
+
+	* lib.c (c_num): Generalized to convert characters to numbers also.
+	This allows functions like gt and lt to work with characters.
+	(chr_isalnum, chr_isalpha, chr_isascii, chr_iscntrl, chr_isdigit,
+	chr_isgraph, chr_islower, chr_isprint, chr_ispunct, chr_isspace,
+	chr_isupper, chr_isxdigit): New functions added.
+
+	* lib.h: (chr_isalnum, chr_isalpha, chr_isascii, chr_iscntrl,
+	* chr_isdigit, chr_isgraph, chr_islower, chr_isprint, chr_ispunct,
+	* chr_isspace, chr_isupper, chr_isxdigit): New functions declared.
+	(c_true): New macro.
+
+2011-12-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (progn_s): New symbol variable.
+	(op_progn): New static function.
+	(eval_init): Initialize new variable, register progn operator.
+
+	* txr.1: progn documented.
+
+2011-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 046
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* stream.c (find_char): New function.
+	(string_in_get_line): Following up TODO. Fixed broken
+	function. Now get_line on a string stream properly returns characters
+	up to and not including the next newlne character, and also consumes
+	the newline character. Other cases are handled properly, also:
+	the stream being at EOF already, or at the last line not being
+	newline-terminated.
+
+2011-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_unwind_protect): Fixed uninitialized variable
+	warning.
+	(eval_init): New functions registered: typeof and vector functions,
+	as well as length_list.
+
+	* lib.c (length): Function renamed to length_list, because it is
+	list specific.
+	(length_vec, size_vec, vector_list): New functions.
+	(length): New function, generic over lists, vectors and strings.
+
+	* lib.h (length_list, length_vec, size_vec, vector_list): Declared. 
+
+	* match.c (h_var, h_fun, robust_length, v_deffilter, v_fun): Use
+	length_list instead of length.
+
+	* parser.l: Introduced # token.
+
+	* parser.y (vector): New nonterminal.
+	(expr): vector is a kind of expr.
+	(chrlist): Bugfix: single-character syntax was not working;
+	for instance #\x to denote the charcter x.
+	(lit_char_helper): Use length_list instead of length.
+
+	* stream.c (string_in_get_line): Bugfix: this was using
+	the wrong length function: length was being applied to a string.
+	The genericity of length makes that correct now, but changing
+	to length_str anyway.
+
+	* txr.1: Blank sections created for functions. Vector syntax
+	documented.
+
+2011-12-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Forgot to treat octal number in the processing
+	of conftest.syms. Removed useless eval.
+
+2011-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 045
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_cond): Fixed behavior for singleton clauses.
+	(eval_init): Use existing function objects car_f, cdr_f,
+	eq_f, eql_f and equal_f. Added identity to function table.
+
+	* lib.h (eql_f): Missing declaration added.
+
+	* txr.1: Documented cond, and, if, or, defun, inc, dec,
+	set, push and pop.
+
+2011-12-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (force_regular_quotes): Function removed.
+	(list): Prior commit reversed.
+
+	* txr.1: Prior commit reversed.
+
+	* RELNOTES: No semantics clarification in quasiquote; bugfixes only.
+
+2011-12-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_qquote_error, op_unquote_error): New static functions.
+	(expand_qquote): Bugfix: missing case added to handle directly quoted
+	quasiquote.
+	(eval_init): Error-catching pseudo-operators registered in
+	op_table.
+
+	* parser.y (force_regular_quotes): New function.
+	(list): Quotes within unquotes and splices are regular.
+
+	* txr.1: Clarified new rules. Removed description of ,'form and ,*'form
+	special syntax.
+
+2011-12-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Expose lazy lists in TXR Lisp.
+
+	* eval.c (eval_init): New intrinsic functions.
+
+	* lib.c (rplaca, rplacd, lcons_fun): New functions.
+	(make_lazycons): Renamed to make_lazy_cons, relocated
+	and turned into external function.
+	(lazy_stream_func, lazy_stream_cons): Follow rename
+	of make_lazycons.
+
+	* lib.h (rplaca, rplacd, make_lazy_cons, lcons_fun): 
+	Declared.
+
+	* txr.1: Stub sections created.
+
+2011-12-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (uw_protect_s, return_s, return_from_s): New symbol
+	variables.
+	(op_unwind_protect, op_block, op_return, op_return_from): 
+	New static functions.
+	(expand): Removed case for call, if, and, and or. These operators
+	evaluate all their arguments, so the code walker can treat them
+	as a function calls.
+	Added case for block and return-from.
+	(eval_init): New symbols interned.  New operator functions
+	registered in op_table.
+
+	* txr.1: Blank sections added.
+
+2011-12-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (split_str, split_str_set): Bugfix: access beyond the end of
+	the input string.
+
+2011-12-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): String and character functions
+	exposed as intrinsics.
+
+	* txr.1: Blank sections created.
+
+2011-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Added stub sections for new functions.
+
+2011-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c: Symbol related intrinsic functions and variables made
+	available:
+
+	* lib.h (sym_name): Dangling declaration removed.
+
+2011-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (list): unquote and splice actions look inside the
+	argument form. If an unquote or splice are applied to a quoted
+	form, its quote becomes a regular quote.
+	This behavior is necessary to make ,',form work in nested
+	quotes, otherwise the ' is a quasiquote which captures
+	the comma in ,form, reducing ,',form to ,form.
+
+	* txr.1: Documented this special behavior.
+
+2011-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_qquote): Bugfix: removed bogus recognition
+	and processing of regular quote form. This broke nested
+	backquote processing, and quasiquote forms containing
+	non-quasi-quotes like like '(a 'b ,c).
+
+2011-12-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 044
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-12-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Started Lisp documentation. Updated description of
+	symbol syntax.
+
+2011-12-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (int_str): Return nil rather than 0 if no digits are extracted
+	at all.
+
+2011-12-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_skip, h_coll, v_skip, v_collect): Evaluate the arguments.
+	(do_txeval): Optimization: short-circuit out if the expression is nil,
+	without establishing the exception handler.
+
+2011-12-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_skip): Bugfix: Nov 12 commit caused regression:
+	skip min/max arguments not working!
+
+	* RELNOTES: Updated.
+
+2011-12-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Dropping the silly cons return value from txeval.
+	Two interfaces are provided to the function. One throws
+	on unbound variable, the other which evaluates them to the
+	symbol noval_s (used in exception handling).
+
+	* match.c (do_txeval): New static function.
+	(txeval): Functionality moved to do_txeval.
+	(txeval_allow_ub): New static function.
+	(vars_to_bindings, h_fun, v_freeform, v_next, v_merge, v_bind, v_set,
+	v_cat, v_output, v_deffilter, v_fun): No need to
+	use cdr to get the value from txeval.
+	(v_throw): Use txeval_ub_allowed, since unbound variables
+	are allowed in throw.
+	(v_try): Detect unbound arguments by checking for noval_s rather than
+	nil. No need to use cdr.
+
+2011-12-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (eval_form): Function renamed to txeval so its is
+	not confused with the Lisp evaluation functions.
+	(vars_to_bindings, h_fun, v_freeform, v_next, v_merge, v_bind, v_set,
+	v_cat, v_output, v_throw, v_deffilter, v_fun): Updated.
+
+2011-11-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.h (or2): Restore macro version of or2, because we need
+	the sequencing! Making it an inline function broke the tests.
+	But we can't have multiple evaluation either, so it's going to use
+	a temporary lexical variable.
+	(uses_or2): Macro which declares the lexical variable needed by or2.
+
+	* debug.c (debug): add uses_or2.
+
+	* eval.c (eval_intrinsic, op_modplace): Likewise.
+
+	* lib.c (lazy_str, lazy_str_force_upto, lazy_str_get_trailing_list):
+	Likewise.
+
+	* match.c (h_parallel, v_freeform, v_parallel, v_output): Likewise.
+
+	* parser.y (unquotes_occur): Likewise.
+
+	* stream.c (format): Likewise.
+
+2011-11-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	Removing useless hash table.
+
+	* parser.h (ln_to_forms_hash): Declaration removed.
+
+	* parser.l (ln_to_forms_hash): Variable removed.
+	(parse_init): Initialization and protection of ln_to_forms_hash
+	removed.
+
+	* parser.y (rl): Update of ln_to_forms_hash removed.
+
+	* txr.1:
+
+2011-11-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure (extra_debugging): New variable. EXTRA_DEBUGGING
+	conditionally generated in config.h.
+
+	* gc.c (break_obj): New static variable.
+	(mark_obj): Debugging feature: if the object is the one stored in
+	break_obj and not yet reached, then call breakpt.
+	(deheap): New debugging function for viewing regions of the heaps.
+
+	* lib.c (breakpt): New function.
+
+	* lib.h (breakpt): Declared.
+
+2011-11-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (hash_process_weak): Fix regression caused by a mistake
+	in the the 2010-01-26 commit, prior to release 033. When processing a
+	table with weak values, this function was mistakenly testing the keys
+	rather than values for for reachability. I noticed this when a test
+	case that should run in constant memory showed unwarranted accumulation
+	of memory.
+
+2011-11-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (op_modplace): Bugfix: conflation of new value and
+	increment value. Separate new value and increment value, and check
+	number of arguments.
+
+	* lib.h (or2): Turned into inline function due to multiple
+	argument evaluation.
+
+2011-11-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: New operators added.
+
+2011-11-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (bindings_helper): Fix uninitialized variable.
+
+2011-11-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (dohash_s): New symbol variable.
+	(op_dohash): New static function
+	(expand): New case for dohash_s.
+	Bugfix for do_s: expand was used rather than expand_forms.
+	(eval_init): dohash_s initialized and entered into op_table.
+
+2011-11-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): hashp and maphash functions registered.
+
+	* hash.c (maphash): New function.
+
+	* hash.h (maphash): Declared.
+
+2011-11-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (expand_vars): Bugfix: was not handling vars
+	of the form var, only (var initform).
+
+2011-11-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support assignment to (car ...) and (cdr ...).
+
+	* eval.c (car_s, cdr_s): New symbol variables.
+	(op_modplace): Cases for car and cdr added.
+	(expand_place): Likewise. Calls abort should the
+	cases fall through rather than returning 42.
+	(expand): Bugfix: for and for* case not propagating
+	source location info. Bugfix: expansion for do added.
+	(eval_init): car_s and cdr_s initialized and used
+	in place of previous intern calls.
+
+	* parser.y (elem): Removed wrong logic for expanding the
+	do form. It was expanding only the first argument.
+
+2011-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (let_star_s, for_s, for_star_s): New symbols.
+	(env_replace_vbind, bindings_helper): New static functions.
+	(op_let): Refactored to allow for let* form. Code for setting
+	up bindings moved into bindings helper, shared by for loop.
+	(op_for, expand_vars): New static functions.
+	(expand): Bugfix: let case was neglecting to walk the var
+	initialization forms. This is done via expand_vars now.
+	let_star_s added to this case to handle let* and let at
+	the same time. New case added for for and for*.
+	(eval_init): let_star_s, for_s, and for_star_s initialized,
+	and entered into op_table.
+
+2011-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* eval.c (eval_init): More functions.
+
+	* txr.vim: More highlighting.
+
+2011-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding streams functions to Lisp evaluator.
+
+	* eval.c (op_let): Bugfix: was not evaluating var init forms.
+	(reg_var): New static function.
+	(eval_init): Registered numerous stream functions and the
+	three standard streams.
+
+	* lib.c (obj_print, obj_pprint): Modified to return a value.
+	(init): eval_init called after stream_init, because eval
+	needs the three standrad streams prepared.
+
+	* lib.h (obj_print, obj_pprint): Declarations updated.
+
+	* stream.c (format): Support t as a shorthand for standard output.
+	(formatv, open_directory, open_file, open_pipe): New functions.
+	(w_opendir): New static function.
+
+	* stream.h (formatv, open_directory, open_file, open_pipe):
+	Declared.
+
+	* txr.vim: set iskeyword such that keyword can contain special
+	characters. Set b:current_syntax to "lisp".
+	(txl_keyword): New keyword category populated with TXR Lisp keywords
+	defined as separate category.
+	(txr_list): Contains txl_keyword.
+	(txr_meta): Contains txl_keyword and txr_list.
+
+2011-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	mapcar, mappend and apply functions.
+	fun operator.
+
+	* eval.c (apply_s): New symbol variable.
+	(apply): Handle functions specified as symbols. Use symbol from context
+	form in error reporting.
+	(apply_intrinsic): New function.
+	(interp_fun): Bugfix: removed evaluation of arguments, since
+	arguments are already evaluated.
+	(op_call): Simplified by not having to handle symbols,
+	since apply does.
+	(op_fun): New function.
+	(expand): Handle special form fun.
+	(mapcarv, mappendv): New functions.
+	(eval_init): Initialize apply_s. Register op_fun function
+	in op_table. Register mapcar, mappend and apply functions.
+
+2011-11-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	Added evaluation support for quote and quasiquote with unquotes.
+	New functions list, append and eval.  Code walking framework for
+	expanding quasiquotes.  quotes right now.
+
+	* eval.c (let_s, lambda_s, call_s, cond_s, if_s, and_s, or_s
+	defvar_s, defun_s, list_s, append_s): New symbol variables.
+	(eval_intrinsic, op_quote, expand_forms, expand_cond_pairs,
+	expand_place, expand_qquote): New static functions.
+	(expand): New external function.
+	(eval_init): Initialize new symbol variables. Use newly defined symbol
+	variables to register functions. Also, new functions: quote, append,
+	list and eval.
+
+	* eval.h (expand): Declared.
+
+	* lib.c (appendv): New function.
+	(obj_init): quote and splice operator symbols moved into system
+	package.
+	(obj_print, obj_pprint): Support for printing quotes and splices.
+
+	* lib.h (appendv): Declared.
+
+	* match.c (do_s): New symbol variable.
+	(syms_init): New variable initialized.
+	(dir_tales_init): New variable used instead of intern.
+
+	* match.h (do_s): Declared.
+
+	* parser.y (elem): @(do) form recognized and its argument passed
+	through the new expander.
+	(o_elem, quasi_item): Pass list through expander.
+	(list): Use choose_quote to decide whether to put
+	regular quote or quasiquote on quoted list.
+	(meta_expr): Fixed abstract syntax so the expression is a single
+	argument of the sys:expr, rather than multiple arguments.
+	(unquotes_occur, choose_quote): New static function.
+
+2011-11-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (expr): Set source location info on elements.
+	(strlit): Set location info. 
+
+2011-11-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (subst_vars): Handle expr_s, so that
+	Lisp expressions can be interpolated into quasiliterals.
+	(extract_vars): Avoid recursing into expressions marked
+	with expr_s.
+	(do_output_line): Handle expr_s so that Lisp expressions
+	can be interpolated into output.
+
+	* parser.y (o_elem, quasi_items): Handle list expressions,
+	annotated with expr_s.
+
+2011-11-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11436
+
+	Lisp interpreter added.
+
+	* gc.c (finalize, mark_obj): Handle ENV objects.
+
+	* hash.c (struct hash): acons_new_l_fun function
+	pointer order of arguments change.
+	(equal_hash): Handle ENV.
+	(make_hash, gethash_l): Use cobj_handle for
+	type safety. Follow change in acons_new_l.
+	(gethash, gethash_f, remhash, hash_count,
+	hash_get_userdata, hash_set_userdata, hash_next): Use cobj_handle.
+	(gethash_n): New function.
+
+	* hash.h (gethash_n): Declared.
+
+	* lib.c (env_s): New symbol variable.
+	(code2type, equal): Handle ENV.  (plusv, minusv, mul, mulv, trunc, mod,
+	gtv, ltv, gev, lev, maxv, minv, int_str): New functions.
+	(rehome_sym): New static function.
+	(func_f0, func_f1, func_f2, func_f3, func_f4, func_n0, func_n1,
+	func_n2, func_n3, func_n4): Initialize new fields of struct func.
+	(func_f0v, func_f1v, func_f2v, func_f3v, func_f4v,
+	func_n0v, func_n1v, func_n2v, func_n3v, func_n4v,
+	func_interp): New functions.
+	(apply): Function removed: sanely re-implemented in new eval.c file.
+	(funcall, funcall1, funcall2, funcall3, funcall4): Handle
+	variadic and interpreted functions.
+	(acons, acons_new, acons_new_l, aconsq_new, aconsq_new_l): Reordered
+	arguments for compatibility with Common Lisp acons.
+	(obj_init): Special hack to prepare hash_s symbol, which is
+	needed for type checking inside the hash table funtions invoked
+	by make_package, at a time when the symbol is not yet interned.
+	Initialize new env_s variable.
+	(obj_print, obj_pprint): Handle ENV. Fix confusing rendering of
+	of function type.
+	(init): Call new function eval_init.
+
+	* lib.h (enum type): New enumeration member ENV.
+	(struct func): functype member changed to bitfield.
+	New bitfied members minparam and variadic.
+	New members in f union: f0v, f1v, f2v, f3v,
+	f4v, n0v, n1v, n2v, n3v, n4v.
+	(struct env): New type.
+	(union obj): New member e of type struct env.
+	(env_s): Variable declared.
+	(plusv, minusv, mul, mulv, trunc, mod, gtv, ltv, gev, lev, maxv, minv,
+	int_str): New functions declared.
+	(func_f0v, func_f1v, func_f2v, func_f3v, func_f4v,
+	func_n0v, func_n1v, func_n2v, func_n3v, func_n4v,
+	func_interp): Likewise.
+	(apply): Declaration removed, and re-introduced in eval.h.
+	(acons, acons_new, acons_new_l, aconsq_new, aconsq_new_l): Declarations
+	updated to new argument order.
+
+	* match.c (bindable): static function moved to eval.c, where
+	it becomes external.
+	(h_var, h_coll, h_parallel, h_fun, v_parallel, v_gather,
+	v_collect, v_merge, v_fun): Follows argument order change in
+	acons functions.
+	(subst_vars): Print atoms other than strings.
+	(eval_form): Support @(...) syntax for evaluating Lisp forms.
+	(v_do, h_do): New functions.
+	(dir_tables_init): Insert v_do and h_do into tables.
+
+	* parser.l: Token syntax for numbers and symbols merged.
+	Symbols in a nested context can consist of various additional
+	characters.  Useless code removed from action for '('/METAPAR.
+
+	* stream.c (format): Bugfix in type checking, in the
+	case that the stream argument is nil and defaults to a string stream.
+
+	* txr.vim: Updated for new token syntax. Fixed uses of
+	unescaped + operator.
+
+	* unwind.c (uw_set_func)
+	* unwind.h (numeric_assert, range_bug_unless): Missing
+	whitespace in message added.
+
+	* Makefile (OBJS): eval.o added.
+
+	* dep.mk: Updated.
+
+	* eval.c: New file.
+
+	* eval.h: New file.
+
+2011-11-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (getplist_f): New function.
+
+	* lib.h (getplist_f): Declared.
+
+	* match.c (v_collect, h_coll): Use getplist_f to distinguish
+	the case that :vars is explicitly specified as (). In this
+	case, no bindings escape from the collect.
+
+	* tests/008/soundex.txr: This test case broke due to using
+	:vars () and yet counting on the variable to exist.
+
+	* RELNOTES: Updated.
+
+2011-11-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_funcall): Set source location info for
+	generated function call.
+
+2011-11-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (texts, elem): Fixed incorrect use of rl rather
+	than rlcp.  Added forgotten rlcp on result of optimize_text.
+
+	* RELNOTES: Updated.
+
+2011-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 043
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+	* RELNOTES: Updated.
+
+2011-11-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (remove_hash_bang_line): Recognize multiple
+	syntax possibilities. A hash bang could be buried in a (text ...)
+	compound, or it could just be a string (thanks to the text form
+	optimization).
+
+2011-11-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Optimization: if all the elements of (text ...) are
+	strings, then replace the (text ...) by the catenation
+	of those strings.
+
+	* parser.y (optimize_text): New function.
+	(elem): Use optimize_text.
+
+2011-11-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (plus, minus): Fixed wrong assertion which would incorrectly
+	fire for inputs that do not overflow.
+
+	* match.c (search_form): Fixed incorrect loop test which could
+	lead to nonterminating behavior.
+
+	* RELNOTES: Updated.
+
+2011-11-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Semantics change. If a variable is followed by a mixture
+	of text and regular expressions, that whole mixture is
+	considered to follow the variable and used for matching.
+
+	The earlier semantics change whereby a single unescaped
+	space denotes the regular expression / +/ broke the
+	simple case   @a word.   It caused the @a to be followed
+	not by the text " word"  but by just the regular expression
+	element.
+
+	With this change @a word means that a is followed by 
+	the regex / +/ and "word".
+
+	* match.c (text_s): New symbol variable.
+	(h_text): New function.
+	(syms_init): Initialize new symbol variable.
+	(dir_tables_init): Hook h_text into horizontal directives table.
+
+	* match.h (text_s): Declared.
+
+	* parser.y (text, texts): New nonterminals.
+	(elem): TEXT, SPACE and regex are now handled under texts
+	grammar production. All texts are run together and produce
+	an item which looks like (text items ...).
+
+	* txr.1, RELNOTES: Updated.
+
+	* txr.c (remove_hash_bang_line): Updated to find #! buried
+	in (text ...) syntax.
+
+2011-11-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Fix environ test case for C++.
+
+2011-11-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (search_form): Bugfix: we must search to one character
+	position after the end of the line, otherwise we can never match
+	@(eol).
+	(h_eol): Bugfix: do not return t, but the line length.
+
+	* txr.1: Warn users about @var@(bind ...) pitfall.
+
+	* RELNOTES: Updated.
+
+2011-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 042
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+2011-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (char_from_name): const on wchar_t *.
+
+2011-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34630
+
+	* parser.y (repeat_clause, rep_elem): Allow empty body.
+	(yybadtoken): Handle unexpected newline with different message.
+
+	* RELNOTES: Updated.
+
+2011-11-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Relaxing :vars in collect/coll a little bit.
+
+	* match.c (h_coll, v_collect): Only throw an error about
+	missing required variables if the collect iteration collected some new
+	variables.  This allows strict collects with :vars to have
+	some cases which explicitly match and skip unwanted material,
+	without binding variables.  Also, print all missing variables in the
+	diagnostic.
+
+	* txr.1: Mention this special exception.
+
+	* RELNOTES: Updated.
+
+2011-11-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (tests/008/soundex.ok): New test case.
+	(TXR_ARGS): Specified for new test case.
+
+	* tests/008/soundex.expected: New file.
+
+	* tests/008/soundex.txr: New file.
+
+2011-11-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* RELNOTES: New file.
+
+2011-11-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34866
+
+	* match.c (h_skip): Bugfix. Return the length of the line if
+	the skip is to the end of line, not the value t.
+
+	* txr.1: Clarify that @var@(skip)text is useless.
+
+2011-11-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_deffilter): Even better. Just evaluate
+	the arguments individually. Now @(deffilter a b ..)
+	is possible where these evaluate to suitable
+	lists of strings.
+
+	* txr.1: Documented.
+
+2011-11-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	deffilter grows in power: it can take quasistrings.
+
+	* lib.c (cdr_f): New global variable.
+	(funcall1, funcall2, funcall3, funcall4): Fix unterminated
+	arguments in uw_throwf call by using uw_throw instead.
+	(do_or): New static function.
+	(orf): New function.
+	(obj_init): gc_protect and initialize cdr_f.
+
+	* lib.h (cdr_f, orf): Declared.
+
+	* match.c (v_deffilter): Treat the table as forms to be evaluated which
+	must reduce to strings, rather than literal strings.
+
+	* txr.1: Documented.
+
+2011-11-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (yybadtoken): Use ~a to print bad character rather than #\
+	notation.
+
+2011-11-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Regression IDENT, '{' and '}'
+	must be on the same precedence level and right
+	associative. Without this consective braced
+	variables don't work, etc.
+
+2011-11-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	* gc.c (mark_mem_region): Use the Valgrind API only to mark
+	the type field as accessible, not the whole object that
+	we are checking. Marking the whole object accessible hides
+	uninitialized field bugs!
+
+	* lib.c: And found a bug already: lazy_str was not completely
+	initializing all of the object fields (ls.prefix, ls.list)
+	before invoking memory allocating operations, making it
+	possible for the garbage collector to encounter uninitialized
+	object areas.
+
+2011-11-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Added a JSON parsing test case. This flushed out a bug which crashed
+	the garbage collector (uninitialized fields in function objects).
+
+	* Makefile: Defined TXR_ARGS and TXR_OPTS for new test case.
+
+	* hash.c (hash_begin): Construction of cobj modified to obey
+	the correct procedure described in HACKING.
+
+	* lib.c (func_n3, func_n4): These functions neglected to initialize
+	the env member of the function structure.
+
+	* tests/009/json.expected: New file.
+
+	* tests/009/json.txr: New file.
+
+	* tests/009/webapp.json: New file.
+
+2011-11-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11598.
+
+	* match.c (resolve_k): New keyword symbol variable.
+	(h_parallel, v_parallel): Implement :resolve keyword in @(some)
+	directive.
+	(syms_init): New symbol variable initialized.
+
+	* parser.l: Allow (some) to have argument material.
+
+	* parser.y (some_clause, elem): SOME syntax adjusted.
+
+	* txr.1: Documented new :resolve keyword in @(some).
+
+2011-11-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding quote and unquote read syntax to list forms, resembling
+	Lisp. The difference is that splice is spelled ,* because @
+	already means something, and that there is only one quote operator.
+	None of this does anything; it is only syntax.
+
+	* lib.c (quote_s, qquote_s, unquote_s, splice_s): New variables.
+	(obj_init): New variables initialized.
+
+	* lib.h (quote_s, qquote_s, unquote_s, splice_s): Declared.
+
+	* parser.l: Added recognition rules.
+
+	* parser.y (SPLICE): New symbolic token.
+	(list): Added new syntax for quote and splicing.
+
+2011-11-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_fun, v_fun): Bugfix! copy_list should be used for copying
+	the bindings, not copy_alist. Otherwise functions cannot destructively
+	update a binding, which is useless. We want a function not to
+	manipulate the binding list, but to be able to manipulate the
+	contents of bindings.
+	(match_files_ctx): Declaration moved ahead of match_line.
+	(v_fun): Forward declaration added.
+	(match_line): Allow vertical functions to be called from
+	a horizontal context, in a limited way.
+
+	* txr.1: Mention the possibility of a call from a horizontal
+	context falling back on a vertical function.
+
+2011-11-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Bugfix: precedence of { } must be low, close to that of
+	IDENT, otherwise @{var}@(foo) doesn't parse.
+
+2011-11-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Allow directives after variable to be a kind of negative match.
+
+	* match.c (search_form): bugfix: return correct match extent.
+
+	* parser.y: Adjusting associativity and precedence of directives, IDENT,
+	and grouping tokens once again. This is so that a var followed by
+	a directive will turn into one elem, rather than the var being
+	reduced to an elem first.
+
+	* txr.1: Revised documentation to mroe clearly define the concept
+	of a negative match, broken into subsections. Some sections
+	belonging to syntax were moved to an appropriate location.
+	Subsections added to description of form syntax.
+	Explanation of directive-driven syntax.
+
+2011-11-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Variable matches can span over function calls.
+	Function calls following variables have searching semantics.
+
+	* match.c (ml_specline_pos, search_form): New static functions.
+	(h_var): Handle functions and regexes in a common way.
+
+	* parser.y: Adjusted precedence of IDENT and ( so that
+	@var@(func) are parsed into a single var element.
+
+	* txr.1: Documented.
+
+2011-11-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Update for new character constant syntax.
+
+2011-11-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_var): when manipulating specline, propagate the
+	source locatio info.
+	(v_skip): Don't use specline for trace messages, because
+	it may be nil. Use the skip spec.
+
+	* parser.h (rl): Declared.
+	(rlcp): New inline function.
+
+	* parser.y (rl): Static declaration removed. Function becomes
+	extern.
+	(clause): Propagate location info from clause to clause list
+	backbone.
+	(collect_clause, COLL): Bugfix: car/cdr mixup in location info.
+	(elem): Use rlcp function to abbreviate code.
+	(o_elems_opt, o_elems_opt2, o_elem): Set location info.
+
+2011-11-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Changing read syntax for character literals, because we are going to
+	need the single quote in the Lisp way for suppressing evaluation,
+	eventually.
+
+	I'm going with a Scheme-compatible syntax for character literals.
+	It has a richer repertoire of standard character names than Common
+	Lisp, and has a x convention for coding characters in hex.
+
+	* lib.c (obj_print): Print characters in a Scheme-like way.
+
+	* parser.h (end_of_char): New function declared.
+
+	* parser.l (grammar): Implement rules for #\ syntax, with
+	involving new HASH_BACKSLASH token.
+	(end_of_regex): Enhancement: added check that end_of_regex is
+	called in correct state, like the one in end_of_char.
+	(end_of_char): New function.
+
+	* parser.y (repeat_rep_helper, o_elems_transform, define_transform,
+	lit_char_helper): Functions changed to static.
+	(rl): Function moved down, past the grammar section.
+	(HASH_BACKSLASH): New terminal symbol.
+	(chrlit): Grammar redesigned.
+	(char_from_name): New function.
+
+	* txr.1: Character syntax documented.
+
+2011-11-14  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: horizontal directives were being treated as vertical,
+	and the trailing material silently ignored.
+	For instance @(bind a 1)@(bind b 2). This was going to v_bind,
+	v_bind does not check for the trailing material and doe snot
+	call decline_s. The result was that b was not bound.
+	Correct behavior is to process these binds in match_line.
+
+	* match.c (match_line): Check if a directive IS found in the vertical
+	table, and if so report a different error message. The fallback
+	case is that there is no such function or directive.
+	(v_next): Do not check for obsolete syntax any more. This case
+	will not occur any more due to the following changes.
+	(match_files): Do not defer opening the file if the data starts
+	with an incorrectly written next directive.
+	Do not look up and process a vertical directive or function
+	call if it is followed by more material in the same line.
+	Thus vertical directives can longer receive trailing material.
+	This fixes the bug of horizontal directives being treated as
+	vertical
+
+2011-11-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* debug.c (debug): Eliminated duplicate code.
+	Implemented better way of printing character context.
+
+2011-11-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Adding a debugger. This is an experimental prototype.
+
+	* Makefile (OBJS): New object file debug.o.
+
+	* dep.mk: Updated.
+
+	* match.c (h_fun): Use debug_begin and debug_end macros
+	to set up a debug frame for backtracing.
+	(match_line, match_files): Call debug_check to give debugger a chance
+	to instrument call.
+	(v_fun): Use debug_begin and debug_end macros to set up a debug frame
+	for backtracing. Call debug_check to give debugger a chance to
+	instrument call.
+
+	* stream.c (struct strm_ops): New function pointer, flush.
+	(stdio_maybe_write_error): Wrong word in error message corrected.
+	(stdio_flush): New static function.
+	(stdio_ops, pipe_ops): New function entered into tables.
+	(flush_stream): New function.
+
+	* stream.h (flush_stream): Declared.
+
+	* txr.c (help): New options documented.
+	(main): call to debug_init added. New debug options parsed and
+	opt_debugger set accordingly.
+
+	* unwind.c (uw_push_debug, uw_current_frame): New function.
+
+	* unwind.h (uw_frtype): New enumeration member UW_DBG.
+	(struct uw_debug): New frame variant.
+	(union uw_frame): New member, db.
+	(uw_push_debug, uw_current_frame): Declared,
+
+	* debug.c: New file.
+
+	* debug.h: New file.
+
+2011-11-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fix regression in earlier commit:
+
+	"Eliminate line numbers from the abstract syntax
+	 tree representation of the TXR query."
+
+	* match.c (match_funcall): Remove spurious object being
+	added to the front of a form where a line number used
+	to be.
+
+2011-11-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c: Removed <assert.h>
+
+	* txr.c: Likewise.
+
+2011-11-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34813
+
+	* match.c (v_freeform): Fail if the data is null,
+	to avoid a false positive match as an empty line, followed by the type
+	error of incrementing a nonexistent data line number.
+
+2011-11-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Correctly record line number info for regex.
+
+2011-11-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improved line number reporting in errors and debug traces.
+
+	* match.c (debugf): Function removed.
+	(dest_bind, v_output, v_eof): Use debuglf instead of
+	debugf, and sem_error instead of uw_throwf.
+	(match_files): Likewise, and file_err is called
+	with form.
+
+2011-11-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Eliminate line numbers from the abstract syntax
+	tree representation of the TXR query.
+
+	* match.c (debuglf, sem_error, file_err, eval_form): Line number argument replaced
+	with the form to which the situation pertains. Location information is
+	pulled from the hash table entry associated with the form.
+	(dest_set, dest_bind, eval_form, vars_to_bindings): Context argument
+	renamed since it isn't a line number.
+	(struct match_line_ctx): spec_lineno member removed.
+	(ml_all, ml_bindings_specline): lineno parameter removed.
+	(LOG_MISMATCH, LOG_MATCH, h_var, h_skip, h_coll, h_parallel,
+	match_line): Pass elem to debuglf instead of line number.
+	as context.
+	(h_trailer, h_eol): define elem for LOG_MISMATCH and LOG_MATCH macros.
+	(h_fun): Pass elem variable to debuglf instead of line number.
+	Body stored as a simple cons cell once again (no line number).
+	(do_output_line): Line number parameter removed. Pass specline to
+	sem_error instead of line number.
+	(do_output): Adjusted for one less parameter in do_output_line.
+	(mf_from_ml): Pass one less parameter to ml_all. Conversion of
+	specline to spec is just a wrapping into a nested list,
+	with no line number.
+	(spec_bind): Linenumber variable parameter removed from macro.
+	Definition simplified.
+	(v_skip): Pass specline to debuglf instead of spec_linenum,
+	which is no longer computed.
+	(v_trailer): Use new definition of specline. Pass first_spec
+	to sem_error instead of spec_linenum.
+	Computation of ff_specline no longer has to skip line number.
+	(v_freeform, v_block, v_accept_fail, v_next, v_parallel, v_gather,
+	v_collect, v_merge, v_bind, hv_trampoline, v_cat, v_output,
+	v_try, v_defex, v_throw, v_deffilter, v_filter, match_funcall): Use new
+	definition of specline.  Pass first_spec to sem_error instead of
+	spec_linenum.  (v_forget_local): Specline computed differently since
+	there is no linenumber to skip.
+	(h_define): Back to implified representation of function with
+	no extra cell for line number.
+	(v_define, v_fun): Pass first_spec to sem_error instead of
+	spec_linenum. Back to implified representation of function with no
+	extra cell for line number.
+	(match_files): first_spec_item computed differently.
+	Pass first_spec to sem_error instead of spec_linenum.
+
+	* parser.h (source_loc): Declared.
+
+	* parser.l (source_loc): New function.
+
+	* parser.y:x (grammar): Removed line numbers from abstract sytnax
+	tree. A few more places needed the annotation of forms with location
+	info, and a couple of cases of the need to propagate the info was
+	identified. Use extra cons cell as output of until_last to propagate
+	the line number from the symbol to the use.
+
+	* txr.c (remove_hash_bang_line): No longer has to look past
+	line number.
+
+2011-11-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Infrastructure for storing line number information
+	outside of the code, in hash tables.
+
+	* filter.c (make_trie, trie_add): Update to three-argument
+	make_hash.
+
+	* hash.c (struct hash): New members, hash_fun, assoc_fun
+	acons_new_l_fun.
+	(ll_hash): Renamed to equal_hash.
+	(eql_hash): New static function.
+	(cobj_hash_op): Follows ll_hash rename.
+	(hash_grow): Use new function indirection to call hashing function.
+	(make_hash): New argument to specify type of hashing. Initialize new
+	members of struct hash.
+	(gethash_l, gethash, remhash): Use function indirection for hashing and
+	chain search and update.
+	(pushhash): New function.
+
+	* hash.h (make_hash): Declaration updated with new parameter.
+	(pushhash): Declared.
+
+	* lib.c (eql_f): New global variable.
+	(eql, assq, aconsq_new, aconsq_new_l): New functions.
+	(make_package): Updated to new three-argument make_hash.
+	(obj_init): gc-protect and initialize new variable eql_f.
+
+	* lib.h (eql, assq, aconsq_new, aconsq_new_l): Declared.
+
+	* match.c (dir_tables_init): Updated to there-argument make_hash.
+
+	* parser.h (form_to_ln_hash, ln_to_forms_hash): Global variables
+	declared.
+
+	* parser.l (form_to_ln_hash, ln_to_forms_hash): New global variables.
+	(grammar): Set yylval.lineno for tokens that are classified to
+	that type in parser.y.
+	(parse_init): Initialize and gc-protect new global variables.
+
+	* parser.y (rl): New static helper function.
+	(%union): New member, lineno.
+	(ALL, SOME, NONE, MAYBE, CASES, CHOOSE, GATHER,
+	AND, OR, END, COLLECT, UNTIL, COLL, OUTPUT, REPEAT,
+	REP, SINGLE, FIRST, LAST, EMPTY, DEFINE,
+	TRY, CATCH, FINALLY, ERRTOK, '('): Reclassified as lineno type.
+	In the grammar, these keywords can thus provide a stable line number
+	from the lexer.
+	(grammar): Numerous rules updated to add constructs to the
+	line number hash tables via the rl helper.
+
+	* dep.mk: Updated.
+
+	* Makefile (depend): Use the installed, stable txr in the
+	system path to update dependencies rather than locally built ./txr, to
+	prevent the problem that txr is broken because out out-of-date
+	dependencies, and thus cannot regenerate dependencies.
+
+2011-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34799: errors in horizontal functions
+	reported to caller line number.
+
+	* match.c (ml_bindings_specline): Extended with extra argument
+	(h_coll): Pass nil for new argument of ml_bindings_specline.
+	(h_fun): Extract line number from stored function.
+	Pass line number to ml_bindings_specline.
+	(h_define, v_define): Store function as a cons cell containing
+	the line number and body.
+
+2011-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Document -l/--lisp-bindings.
+
+2011-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (opt_nobindings, opt_arraydims): Global
+	variables moved from parser.l.
+	(opt_lisp_bindings): New variable.
+	(dump_bindings): Dump Lisp syntax bindings
+	on standard output if opt_lisp_bindings is set.
+	(v_cat): Do not complain about trailing material;
+	this is not compatible with horizontal cat.
+
+	* parser.l (opt_nobindings, opt_arraydims): Moved
+	to match.c.
+
+	* txr.c (txr_main): New options, --lisp-bindings
+	and the equivalent -l.
+
+	* txr.h: opt_lisp_bindings declared.
+
+2011-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11583
+
+	* match.c (dir_tables_init): Mapping flatten_s, forget_s,
+	local_s, merge_s, set_s, cat_s and filter_s to hv_trampoline
+	function, thereby making all these directives work in
+	horizontal contexts in one fell swoop.
+
+2011-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11583
+
+	More generic approach.
+
+	* match.c (h_bind): Function removed.
+	(hv_trampoline): New function.
+	(dir_tables_init): hv_trampoline installed in
+	h_directive_table instead of h_bind.
+
+2011-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Fixed wrong error message.
+
+2011-11-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_fun): Bugfix: if there is material after
+	the function call, decline it; it is a horizontal context.
+
+	* txr.1: Discussion and examples of calls that are
+	in a horizontal context.
+
+2011-11-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented horizontal function definitions and calls
+
+2011-11-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11583
+
+	@(bind) in horizontal mode.
+
+	* match.c (mf_from_ml, h_bind): New functions.
+	(dir_tables_init): h_bind entered into table.
+
+2011-11-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_fun, v_fun): Slightly more informative tracing from failed
+	function calls.
+
+2011-11-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Missing coll keyword added.
+
+2011-11-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11431. First cut at horizontal match functions.
+
+	* match.c (h_fun): New function.
+	(match_line): Rearranged not to do hash lookup if the directive is a
+	regex or list.  If hash lookup fails, try it as a horizontal function.
+	(h_define): New function. Handles horizontal function syntax embedded
+	in line.
+	(v_define): Handle the horizontal function syntax occuring
+	on a line by itself.  The function info is now stored as a cons cell
+	whose car is the vertical function and cdr the horizontal one.
+	(v_fun): Adjust to new function storage convention.
+	(dir_tables_init): h_define entered in table.
+	* parser.y: Added syntax for horizontal define.
+
+2011-11-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Make sure whitespace is recognized after @.
+
+2011-11-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11581 & bugfix.
+
+	* match.c (noval_s): New symbol variable.
+	(vars_to_bindings): Use a default value of noval_s to indicate a
+	required variable, rather than nil, which would not allow
+	an optional variable with a default value of nil.
+	(h_coll, v_collect): Check default value against noval_s, rather than nil.
+	(v_gather): Support :vars keyword.
+	(syms_init): Initialize new symbol variable.
+
+	* txr.1: Documented gather's :vars parameter.
+
+2011-11-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11581
+
+	* match.c (gather_s): New keyword variable.
+	(v_gather): New function.
+	(syms_init): gather_s initialized.
+	(dir_tables_init): v_gather entered into table.
+
+	* match.h (gather_s): Declared.
+
+	* parser.l: GATHER token scanning added.
+
+	* parser.y: GATHER token added. gather_clause nonterminal added.
+
+	* txr.1: New directive documented.
+
+	* txr.vim: gather keyword introduced.
+
+2011-11-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (env): Fixed inappropriate cut-and-pasted error messages.
+	Check for failure of GetEnvironmentStringsW, and call
+	FreeEnvironmentStringsW is called.
+
+2011-11-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (dir_tables_init): Bugfix: horizontal @(some)
+	directive not included in dispatch table.
+
+2011-11-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Bugfixes. Before the compiler tests, we must
+	remove the conftest executable, to make sure that the next test will
+	try to re-make it. The configure runs fast enough that the new
+	conftest.c does not always have a timestamp which is newer than
+	previous conftest executable.
+
+2011-11-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11442. Make work on MingW.
+
+	* configure: Test for environ and GetEnvironmentStrings.
+
+	* lib.c: Conditionally include <windows.h>.
+	(env): Implemented for POSIX and Windows with #ifdefs.
+
+2011-11-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11442. Access to environment variables.
+
+	* lib.c (env_list): New static variable.
+	(env): New function.
+	(match): Declaration of nonexistent function removed.
+	(obj_init): New variable gc-protected.
+
+	* lib.h (env): Declared.
+
+	* match.c (env_k): New symbol variable.
+	(v_next): Implemented :env.
+
+	* txr.1: @(next :env) described.
+
+2011-11-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (ll_hash): Added a break in the case that handles
+	pointer hashing of identity-equal objects. Without this, if the
+	pointer size is not 4 or 8, we fall through to the next case.
+
+2011-11-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.c (help): Change year from 2009 to 2011.
+
+2011-11-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/008/students.txr: Use disciplined collect with :vars.
+
+2011-11-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/008/students.txr: Regexes removed.
+
+2011-11-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Added missing keywords.
+
+2011-11-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* genman.txr: Use filter for mapping month digits to names.
+	Added comment about where to find the right man2html.
+
+2011-11-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.vim: Added installation instructions.
+
+2011-11-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Syntax highlighting for Vim.
+
+	* txr.vim: New file.
+
+2011-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 041
+
+	Bugfixes:
+
+	Runaway recursion in @(block) directive, introduced in 040.
+
+	Fixed bug in matching list variable against text, at the same
+	time clarifying semantics to longest-match.
+
+	Fixed potential excessive memory use caused by refactoring in 040.
+
+	Features:
+
+	New :append keyword in @(output) to append instead of overwriting.
+
+	Variable contents can be treated as input sources using :string
+	and :list keywords in @(next). Variables can be treated as output
+	destinations using :into keyword in @(output).
+
+	New @(set) directive for destructive assignment to a variable.
+
+	New filters: :upcase and :downcase.
+
+	@(bind) can now compare left and right objects through filters.
+
+	Filters can now be chained into compound filters.
+
+	Pattern matching functions can be used as filters.
+
+	Shorthand notation in @(deffilter) when multiple strings map to the
+	same replacement string.
+
+	@(cat) directive changes syntax.
+
+	Error handling improvements in parser: no more reams and reams of
+	errors.
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+2011-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	We don't include headers in headers in this project.
+
+	* parser.h: Do not include <stdio.h>
+
+	* regex.c: Include <limits.h>
+
+	* regex.h: Do not include <limits.h>
+
+2011-10-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34691
+
+	Changing the parameter passing convention for vertical directives.
+	They take one parameter which is a pointer, rather than a copy
+	of the structure. They do not have to perform a structure
+	assignment when returning next_spec_k.
+
+	* match.c (v_match_func): Typedef updated to new function
+	signature.
+	(v_skip, v_trailer, v_freeform, v_block, v_accept, v_accept, v_next,
+	v_parallel, v_collect, v_flatten, v_forget, v_forget, v_merge, v_bind,
+	v_set, v_cat, v_output, v_define, v_try, v_defex, v_throw, v_deffilter,
+	v_filter, v_eof, v_fun): Refactored.
+	(match_files): Updated dispatch logic to new style calls.
+	(match_funcall): Updated to new way of calling v_fun.
+
+2011-10-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Grammar fixes. Expanded on lazy strings a little bit.
+	Added something about mem_t *, and a few extra words here and there,
+	including a blurb about a Valgrind debugging caveat.
+
+2011-10-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34657
+
+	* txr.1: Added explanations about the differences between
+	empty streams and empty lines, and to watch out when passing
+	empty strings to @(next :string ...).
+
+2011-10-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfix: prepared_error_message variable needs to be gc-protected.
+
+	* parser.h (parse_init): Declared.
+
+	* parser.l (parse_init): New function.
+
+	* txr.c (main): Call parse_init.
+	(txr_main): No need to gc-protect yyin_stream since parse_init does it.
+
+2011-10-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Parse error handling improvements.
+
+	* parser.l (prepared_error_message): New static variable.
+	(yyerror): Emit and clear prepared error message.
+	(yyerrprepf): New static function.
+	(yybadtoken): Function moved into parser.y.
+	(grammar): For irrecoverable lexical errors, stash error message
+	with yyerrprepf and return the special error token ERRTOK to generate a
+	syntax error. I could find no other interface to the parser to make it
+	cleanly exit.
+
+	* parser.y (ERRTOK): New terminal symbol, does not appear anywhere
+	in the grammar.
+	(spec): Bail after 8 errors, recover to nearest newline, and
+	use yyerrok to clear error situation.
+	(YYEOF): Provided by Bison, conditionally defined for other yacc-s.
+	(yybadtoken): Function moved from parser.l.  Checks for the next
+	token being YYEMPTY or YYEOF, and also handles ERRTOK.
+
+	* stream.c (vformat_to_string): New function.
+	(format): If stream is nil, format to string and return it.
+
+	* stream.h (vformat_to_string): Declared.
+
+2011-10-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_cat): Bugfix: unterminated variable argument list.
+
+	* tests/001/query-3.txr: Updated to new cat syntax.
+
+2011-10-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixed lame @(cat) directive, without obsolescence phase.
+
+	* match.c (v_cat): Rewritten.
+
+	* txr.1: Documented.
+
+2011-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: put in set -u to trap unbound variables, 
+	and fixed resulting errors that were found.
+
+2011-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (filter_s): New symbol variable.
+	(v_filter): New function.
+	(syms_init): New symbol variable initialized.
+	(dir_tables_init): New function entered into table.
+
+	* txr.1: Documented new filter directive.
+
+2011-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	dep.mk: Regenerated.
+
+2011-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Shorthand for filters which map multiple texts to a common
+	replacement text.
+
+	* filter.c (build_filter_from_list): Allow tuples to denote
+	multiple keys mapping to the same value.
+
+	* lib.c (do_curry_123_2, do_curry_123_1): New static functions.
+	(curry_123_2, curry_123_1): New functions.
+
+	* lib.h (curry_123_2, curry_123_1): New functions declared.
+
+	* match.c (v_deffilter): Allow tuples of strings rather than
+	just pairs.
+
+	* txr.1: Updated.
+
+2011-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y: Remove mention of nonexistent terminal \\ 
+	from %right associativity clause.
+
+2011-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c (fun_k): New keyword variable.
+	(function_filter): Use :fun keyword symbol instead of fun.
+	(filter_init): New keyword variable initialized.
+
+	* filter.h (upcase_k, downcase_k, fun_k): Declared.
+
+	* txr.1: Updated.
+
+2011-10-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_bind): Use sem_error to throw errors with line number
+	info.
+
+2011-10-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugs #34641, #34629.
+
+	* lib.c (search_str_tree): If multiple strings from the needle tree
+	matching within within the haystack string, then take the leftmost
+	match. If there are multiple matches at the same leftmost position,
+	take the longest one.
+
+2011-10-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c (function_filter): New function.
+	(get_filter): Handle (fun ...) syntax.
+
+	* match.c (v_bind): Establish dynamic environment frame around
+	dest_bind, and stash the bindings there so filters can have access 
+	to the bindings.
+	(v_output): Likewise, around do_output calls.
+	(v_fun): New function.
+	(match_files): Function handling broken out into v_fun.
+	(match_funcall): New function.
+
+	* match.h (match_funcall): Declared.
+
+	* unwind.c (uw_push_env): Initialize match_context.
+	(uw_get_match_context, uw_set_match_context): New functions.
+
+	* unwind.h (struct uw_dynamic_env): New member, match_context.
+	(uw_get_match_context, uw_set_match_context): Declared.
+
+	* txr.1: Documented function filters.
+
+2011-10-24  Kaz Kylheku  <kaz@kylheku.com>
+
+	Turning attention to some plumbing.
+
+	* unwind.c (uw_env_stack): New static variable.
+	(uw_unwind_to_exit_point): Maintain correct uw_env_stack
+	during unwinding.
+	(uw_find_env): Just retrieve the env stack pointer; no search.
+	(uw_push_env): Store a pointer to the previous
+	environmental frame and just initialize the bindings to nil.
+	No need to cons up a copy of the bindings from the previous frame.
+	(uw_get_func): Perform a search through the environment stack.
+
+	* unwind.h (struct uw_dynamic_env): New member, up_env.
+
+2011-10-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/007/except-1.txr: Use next :list instead
+	of piping from echo command. As a result, this test case should run on
+	MingW.
+
+2011-10-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (list_k, string_k): New keyword symbol variables.
+	(v_next): Implement :list and :string keywords.
+	(syms_init): New keyword variables initialized.
+	NOTE: the :var keyword is deprecated.
+
+	* txr.1: Documented :list and :string.
+
+2011-10-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (h_skip): Bugfix: bad agument list in debugf call.
+
+2011-10-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11474
+
+	* filter.c (filter_equal): Takes two filters instead of one.
+	(lfilt_k, rfilt_k): New keyword variables.
+	(filter_init): New keyword variables initialized.
+
+	* filter.h (filter_equal): Declaration updated.
+	(lfilt_k, rfilt_k): Declared.
+
+	* lib.c (funcall4): New function.
+	(do_curry_1234_34): New static function.
+	(curry_1234_34): New function.
+	(do_swap_12_21): New static function.
+	(swap_12_21): New function.
+
+	* lib.h (funcall4, curry_1234_34, swap_12_21): Declared.
+
+	* match.c (dest_bind): Swap use the function argument swapping
+	combinator when calling tree find such that the value
+	being searched is on the left and pattern material is on the right.
+	(v_bind): Implemented :lfilt and :rfilt.
+
+	* txr.1: Documented :lfilt and :rfilt.
+
+2011-10-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c (get_filter_trie): Function renamed to get_filter. A filter
+	is not necessarily a trie.
+	(string_filter, compound_filter): New functions.
+	(get_filter): Recognize a compound filters and return a function
+	which implements it.
+
+	* filter.h (get_filter_trie): Declaration renamed.
+
+	* match.c (format_field, v_bind, v_output): Follow get_filter_trie
+	rename. Error message text updated.
+
+	* txr.1: Describe compound filters.
+
+2011-10-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11474
+
+	* filter.c (filter_equal): New function.
+	(upcase_k, downcase_k): New keyword variables.
+	(filter_init): New keyword variables initialized,
+	and new upcase and downcase filters registered.
+
+	* filter.h (filter_equal): Declared.
+
+	* lib.c (tree_find): Takes new argument, the equality test function.
+	(upcase_str, downcase_str): New functions.
+	(do_curry_123_23): New static function.
+	(curry_123_23): New function.
+
+	* lib.h (tree_find): Declaration updated.
+	(upcase_str, downcase_str, curry_123_23): Declared.
+
+	* match.c (dest_bind): Updated to take equality function.
+	Uses it and passes it down to tree_find.
+	(v_bind): Filter feature implemented.
+	(h_var, v_try): Add equal_f to dest_bind argument list.
+
+	* txr.1: Updated to describe new filters and bind arguments.
+
+2011-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_collect, v_coll): Establish empty list bindings
+	for all :vars in the event that the collect turns up nothing.
+
+	* txr.1: Document behavior.
+
+2011-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_collect): Regression bugfix. Make it work like the comment
+	says: until/last clause has visibility to uncollated bindings from
+	collect.
+
+2011-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implementing @(set) directive for assigning to variables
+	destructively.
+
+	* match.c (dest_set, v_set): New static functions.
+	(dir_tables_init): Add v_set to vertical directives hash table.
+
+	* txr.1: Documented.
+
+2011-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (v_output): When appending output to a variable,
+	flatten the previous contents so we can append to a single
+	string, or to deeply nested list, etc.
+
+	* txr.1: Documented these new extensions to next and output.
+
+2011-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	New features. Strling list output streams in stream
+	library, allow output to be captured as a list of strings
+	representing lines (in contrast to string streams which capture
+	a single string).
+
+	The output directive can output to a variable,
+	and next can scan over a variable.
+
+	* lib.c (span_str, compl_span_str, break_str): New functions.
+
+	* lib.h (span_str, compl_span_str, break_str): New functions declared.
+
+	* match.c (into_k, var_k): New keyword variables.
+	(mf_file_data): New static function.
+	(v_next): Refactored argument handling. Added support for :var
+	keyword.
+	(v_output): Added support for :into keyword.
+
+	* stream.c (strlist_mark, strlist_out_put_string,
+	strlist_out_put_char): New static functions.
+	(strlist_out_ops): New static struct.
+	(make_strlist_output_stream, get_list_from_stream): New functions.
+
+	* stream.h (make_strlist_output_stream, get_list_from_stream): New
+	functions declared.
+
+2011-10-21  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (proper_plist_to_alist, improper_plist_to_alist): New
+	functions.
+
+	* lib.h (proper_plist_to_alist, improper_plist_to_alist): New
+	functions declared.
+
+	* match.c (append_k): New keyword symbol variable.
+	(complex_open): New append argument.
+	(v_output): Streamlined parsing of keywords.
+	Support :append keyword.
+
+	* txr.1: Output directive's keyword documentation revised.
+
+2011-10-20  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34609
+
+	* match.c (v_block): Regression induced by rabid refactoring. Block
+	must apply remaining directives to data, excluding itself, otherwise
+	runaway recursion takes the place of correct behavior.
+
+2011-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 040
+
+	Single unescaped space  behaves like @/ +/ regex.
+
+	Ported to native Windows via MinGW.
+
+	Bugfixes for Cygwin and more robust handling of
+	errors arising from Windows not having proper
+	Unicode support (16 bit wide characters only).
+
+	Nasty GC bug fixed for all platforms, exposed by gcc 4.5.2, x86_64. 
+
+	[Internal] The huge functions match_line and match_files have been
+	broken up into functions dispatched by hash table lookup on directive
+	symbols.
+
+	[Internal] Hashing of some objects improved.
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+2011-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425
+
+	* match.c (repeat_spec_k): New symbol variable
+	(h_match_func): New typedef.
+	(elem_bind): New macro.
+	(h_var, h_skip, h_coll, h_parallel, h_trailer, h_eol): New functions.
+	(match_line): Remaining directives moved to functions.
+	(syms_init): New symbol variable initialized.
+	(dir_tables_init): New functions entered into hash table.
+
+2011-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425
+
+	Refactoring match_files to make it easier to break up into
+	subfunctions, similarly to what was done with match_files.
+
+	* match.c (match_line_ctx): New struct type.
+	(ml_all, ml_specline, ml_bindings_specline): New functions.
+	(LOG_MISMATCH, LOG_MATCH): Macros moved outside of function,
+	updated to refer to structure members rather than local
+	variables.
+	(match_line): Takes only one argument now.
+	All recursive calls updated.
+	(v_freeform): Call to match_line updated.
+	(match_files): Likewise.
+
+2011-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425
+
+	* match.c (v_accept_fail, v_next, v_parallel, v_collect,
+	v_flatten, v_forget_local, v_merge, v_bind, v_cat, v_output,
+	v_try, v_define, v_defex, v_throw, v_deffilter, v_eof):
+	New functions.
+	(match_files): Remaining directives moved to functions.
+	(dir_tables_init): New functions entered into hash table.
+
+2011-10-19  Kaz Kylheku  <kaz@kylheku.com>
+
+	* hash.c (ll_hash): Hashing of pointers should take into
+	account alignment, otherwise only values divisible by the
+	alignment occur. This patch takes into considerations that
+	val values are pointers to object descriptors in a heap which
+	are four words wide, and so most likely aligned to 16 byte
+	boundaries (32 bit systems) or 32 byte boundaries (64 bit).
+	We need to shift.
+
+2011-10-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425
+
+	* match.c (v_block): New function.
+	(match_files): Block directive moved to function.
+	(dir_tables_init): v_block entered into table.
+
+2011-10-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425
+
+	* match.c (spec_bind): New macro.
+	(v_freeform): New function.
+	(match_files): Freeform logic moved to function.
+	(dir_tables_init): v_freeform entered into table.
+
+2011-10-18  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425
+
+	* match.c (same_data_k): Symbol variable renamed to next_spec_k.
+	(v_skip): Restructured not to return next_spec_k when there
+	are no more specs, but rather thread directly to what match_file
+	will do anyway, namely return the bindings and data position.
+	(v_trailer): New functions.
+	(match_files): Trailer logic moved to function.
+	(syms_init): Follows renaming of variable.
+	(dir_tables_init): GC bugfix: did not protect global hash
+	tables again, like in filter.c previously.
+
+2011-10-17  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425
+
+	Vertical skip directive moved into function dispatched
+	via hash table. Test suite passes.
+
+	* lib.c (cptr_s): New symbol variable.
+	(cptr_equal_op): New static function.
+	(cptr_equal_op, cptr, cptr_get): New functions.
+	(cptr_ops): New static structure.
+	(obj_init): New variable initialized.
+
+	* lib.h (cptr_s, cptr, cptr_get): Declared.
+
+	* match.c (decline_k, same_data_k): New symbol variables.
+	(v_match_func): New typedef.
+	(v_skip): New function.
+	(match_files): Check symbol in v_directive_table and dispatch
+	the associated function if an entry exists.
+	Skip directive handling moved to v_skip function.
+	(syms_init): Initialize new symbol variables.
+	(dir_tables_init): Enter v_skip into v_directive_table under
+	skip_s symbol.
+
+2011-10-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	Quick and dirty port to MinGW.
+
+	* configure: Test for presence of <sys/wait.h> added.
+	Conditionally generates HAVE_SYS_WAIT variable in config.h.
+
+	* stream.c: Include <sys/wait.h> conditionally.
+	(pipe_close): Do not test ermination status with WIFEXITED, etc.
+	if there is no <sys/wait.h> header.
+
+2011-10-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: reduced post-configure advice to just point
+	to the INSTALL guide.
+
+	* INSTALL: New file.
+
+2011-10-16  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c (trie_filter_string): Fix warning about uninitialized
+	variable (not a bug, but compiler cannot prove that).
+
+2011-10-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Task #11425. Refactoring match_files to make it easier to
+	break up into subfunctions. Arguments are packaged into a structure,
+	so that subfunctions won't have to all have big argument lists.
+
+	* match.c (h_directive_table, v_directive_table): New variables.
+	(match_files_ctx): New structure.
+	(mf_all, mf_args, mf_data, mf_spec, mf_spec_bindings): New functions.
+	(match_files): Takes only one argument now, the context
+	structure. data_lineno variable is a dynamic number.
+	Recursive calls to match_files are handled by creating contexts
+	as appropriate with the helper functions.
+	The old local variable data is now part of the context.
+	(syms_init, dir_tables_init): New functions.
+	(match_init): Just calls syms_init and dir_tables_init.
+
+2011-10-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	Fixed broken GC on x86_64 (Ubuntu 11, gcc 4.5.2). 
+	The issues is that due to the aggressive function inlining
+	in the gc module, the mark_mem_region function is not real
+	subroutine. The address of its local variable &gc_stack_top
+	ended up excluding the machine context saved by setjmp in
+	the parent function. I.e. the buffer was not between the
+	computed stack top and bottom. Thus registers were not being
+	scanned for references to values. I added a little abstraction
+	to the machine context in the process of fixing this.
+
+	* gc.c (struct mach_context, mach_context_t): New type.
+	(save_context): New macro.
+	(mark): Takes two new arguments, pointer to the stack top and
+	machine context. It scans the machine context explicitly rather
+	than relying it to be on the stack, between the top and bottom.
+	This context is in fact only object within the garbage collector part
+	of the activation chain that we need to scan.
+	(gc): Use new abstraction to save machine context. Local variable
+	is used to derive the stack top here. The stack top is the top
+	of the stack above the activation frames in the garbage collector
+	itself. The gc has nothing on its stack that should be scanned,
+	except for the machine context, which is now handled explicitly.
+
+2011-10-15  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: POSIX Portability. Use = instead of ==
+	in test expressions.  This was revealed by ubuntu's dash.
+
+2011-10-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (elem): Amending previous change. A single space
+	should only denote multiple spaces, not mixtures of spaces and
+	tabs. WE have to be careful with tabs because they can be
+	semantically different from spaces (e.g. file with tab delimited
+	fields which can be blank, empty or have leading or trailing spaces.)
+
+	* txr.1: Updated.
+
+2011-10-13  Kaz Kylheku  <kaz@kylheku.com>
+
+	* Makefile (%.ok: %.txr): Use unified diff for showing
+	differences between expected and actual test output.
+
+	* parser.l (yybadtoken): Handle new terminal symbol, SPACE.
+	New rule for producing SPACE token out of an extent of
+	tabs and spaces.
+
+	* parser.y (SPACE): New terminal symbol.
+	(o_var): New nonterminal.  I noticed that the var rule was
+	being used for output elements, and the var rule refers to
+	elem rather than o_elem. A new o_var rule is a simplified
+	duplicate of var.
+	(elem): Handle SPACE token. Transform to regex if it is
+	a single space, otherwise to literal text.
+	(o_elem): Handle SPACE token in output.
+
+	* tests/001/query-2.txr: This query depends on matching
+	single spaces and so needs to use escapes.
+
+	* tests/001/query-4.txr, test/001/query-4.expected: New test
+	case, based on query-2.txr.  It produces the same output,
+	but is simpler thanks to the new semantics of space.
+
+	* txr.1: Documented.
+
+2011-10-12  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bug #34538
+
+	* lib.h (wli): This macro now does the pointer displacement by 1.
+	(auto_str, static_str): #if/#else/#endif gone. These functions just
+	add the type tag. The + 1 logic was incorrect; it should have
+	been + sizeof(wchar_t). But even that was not right because other
+	code expects a wchli_t * to point to the first character,
+	such as the string_out_put_char function.
+
+2011-10-10  Kaz Kylheku  <kaz@kylheku.com>
+
+	Improved support for broken unicode.
+	Regex support for extra-large character sets not compiled in
+	if wchar_t is not wide enough for it.
+	The utf-8 properly throws exceptions when encountering characters
+	that it cannot represent, instead of silently ignoring the
+	situation and continuing with incorrectly computed data.
+
+	* regex.c (FULL_UNICODE): New macro.
+	(CHAR_SET_L3, CHAR_SET_L2_LO, CHAR_SET_L2_HI): Only defined
+	if full unicde is available.
+	(CHSET_XLARGE, cset_L3_t, struct xlarge_char_set,
+	L2_full, L3_fill_range, L3_contains): Ditto.
+	(unon char_set): Member x1 present only under FULL_UNICODE.
+	(char_set_destroy, char_set_add, char_set_add_range,
+	char_set_contains): CHSET_XLARGE cases only available on
+	FULL_UNICODE.
+	(char_set_compile): Default cst variable to CHSET_LARGE.
+
+	* utf8.c (FULL_UNICODE): New macro.
+	(conversion_error): New function.
+	(utf8_from_uc): Throw error if not FULL_UNICODE and character is
+	outside the BMP.
+	(utf8_decode): Likewise.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Documented portability hacks for narrow wchar_t.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 039
+
+	Ported to Cygwin.
+
+	Horizontal modes for @(trailer), @(skip).
+
+	New :greedy keyword in skip which can be given instead of max
+	distance to give it longest match semantics.
+
+	@(collect) and @(coll) support a new clause, @(last).
+
+	The :times keyword in @(collect) and @(coll) introduced in the
+	previous release has a different meaning. The keywords :mintimes
+	and :maxtimes are added, and :maxtimes behaves like :times
+	did previously.
+
+	There is a :vars keyword in @(collect) and @(coll) to have
+	some control over what bindings are collected, as well
+	as error checking for missing bindings and defaulting behavior.
+
+	New @(eol) directive for explicitly matching the end of
+	the input or end of a line.
+
+	New lexical syntax: @(...) and @abc is allowed within expressions.
+	This produces a special structural syntax with no assigned meaning yet.
+
+	Awful bug fixed in function calling: if a function was called with
+	multiple unbound variables, and bindings were produced for them,
+	only one variable was being propagated to the calling environment.
+
+	Bugfixes to binding environment handling in the face of
+	@(local)/@(forget) directive.
+
+	Fix for the issue of unbound variables being silently ignored
+	in some contexts, like quasiliterals. An exception is now thrown.
+
+	Bugfix for an issue with consecutive variables in output.
+
+	Bugfix for an issue with horizontal @(cases) not collecting
+	bindings.
+
+	Bugfix for an issue with @(until) inside @(coll) not seeing
+	bindings from main clause.
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	One more swing at this with the axe.
+
+	* lib.h (wini, wref): New macros.
+
+	* stream.c (string_out_put_char): Rewritten with macros to eliminate
+	preprocessor #if test.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.h (wli, lit_noex): We need null characters on both ends
+	so that this hack is correct for null strings. When recovering
+	the wchar_t pointer from a null literal object, we wil increment
+	unconditionally, since it always points to a null character.
+	We end up skipping past null terminator #1, but safely landing on #2.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Following up to previous commit's TODO.
+
+	* filter.c (struct filter_par): wchar_t becomes wchli_t.
+
+	* lib.h (wchli_t): New type: an incomplete structure type,
+	so that a pointer to this type is incompatible with anything else.
+	(wli): Macro produces const wchli_t * pointer instead of
+	const wchar_t *.
+	(auto_str, static_str): Accept a const wchli_t * instead
+	of const wchar_t *, making it impossible to misuse these
+	functions by passing in a literal.
+
+	* stream.c (string_out_put_char): These type changes showed
+	this hack to have a bug. Confronted with the need to cast
+	from const wchar_t * to const wchli_t *, it's obvious that
+	the conversion has to be done properly with the + 1 in the
+	one platform case, but not the other.
+
+	* txr.c (version): Type changed to const wchli_t.
+
+	* txr.h (version): Declaration updated.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	Ported to Cygwin.
+
+	TODO: there should be some type safety with the new wli macro
+	so that if it is forgotten, there will be a diagnostic.
+
+	* configure (lit_align): New configuration variable
+	and configuration test. Generates LIT_ALIGN in config.h.
+	Fixed the integer-holds-pointer test for the different output
+	from the nm program on Cygwin. The arrays become common symbols
+	marked C which do not show an offset attribute, only size:
+	one less column.
+
+	* filter.c (to_html_table, from_html_table): wrap wide string
+	literals with the wli macro. This must be done from now on for
+	all literals and initializes of arrays that are going to be
+	directly converted to type tagged val-s.
+
+	* lib.h (wli): New macro.
+	(auto_str, static_str, litptr, lit_noex): Handle wide literals on
+	platforms where they are aligned to only two bytes, such that we don't
+	have two bits in the pointer. We can still add our 11 bit type tag, but
+	then when recovering the pointer to the data, we have may have
+	to fix up the pointer. 
+
+	* parser.l: Another portability issue here. Flex generates a scanner
+	which has #include <unistd.h> in the middle, after the source file's
+	own #includes which can introduce macros. On Cygwin, there is some
+	hygiene problem whereby our "noreturn" macro causes the <unistd.h>
+	header to generate bad syntax and fail to compile. Stupid Cygwin
+	and even stupider flex! The workaround is to include <unistd.h>
+	at the top in the flex source.
+
+	* stream.c (string_out_put_char): This is one more place where
+	the string literal handling hack spreads.
+
+	* txr.c (version): Wrap string in wli.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* dep.mk: Regenerated. Too easy to neglect this file.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (vars_to_bindings): Regression fix: recent commit
+	caused test failure. An empty list not treated as a valid collect
+	variable list.
+
+2011-10-09  Kaz Kylheku  <kaz@kylheku.com>
+
+	* configure: Fixed indentation.
+
+2011-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Removed references to obsolete @(next) variant.
+
+2011-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (vars_to_bindings): New function.
+	(match_line): keyword argument :vars implemented for coll.
+
+	* txr.1: Documented :vars.
+
+2011-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (vars_k): New symbol variable.
+	(match_files): Implemented :vars in collect.
+	(match_init): New symbol variable initialized.
+
+2011-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Augment example of @/.*/ being used to skip to the
+	end of the line with @(skip) which is now better style,
+	since it avoids reaching for regexes.
+
+2011-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_line): Skip directive bugfix. If skip is the
+	last item on the line, it must match the whole line by returning
+	success.
+
+2011-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (mintimes_k, maxtimes_k): New keyword variables.
+	(match_line): Implemented :mintimes and :maxtimes, changing
+	the semantics of :times.
+	(match_files): Likewise.
+	(match_init): New keyword variables initialized.
+
+	* txr.1: Updated.
+
+2011-10-08  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Formatting.
+
+2011-10-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_files): Fixed spectacular bug in function calling,
+	dating back to before October 2009 when txr was put into git.
+	Basically, unbound variables were not handled right after
+	the function return, due to the increment step being wrongly
+	written as ``piter = cdr(aiter)'' in the for loop that processes the
+	ub_p_a_pairs. Evil cut and paste!
+
+2011-10-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (greedy_k): New keyword symbol variable.
+	(match_line): Greedy skip implemented.
+	(match_files): Likewise.
+	(match_init): New keyword symbol variable initialized.
+
+	* txr.1: Updated.
+
+2011-10-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (eol_s): New symbol variable.
+	(obj_init): New variable initialized.
+
+	* lib.h (eol_s): Declared.
+
+	* match.c (match_line): Implemented horizontal skip as and
+	new eol directive.
+	(match_lines): Vertical skip defers to horizontal skip if
+	there is trailing material.
+
+	* txr.1: Updated.
+
+2011-10-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (flatten_helper): Function removed.
+	(flatten): Recurse directly, using func_n1.
+
+2011-10-07  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: fxed wrong word.
+
+2011-10-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Extending syntax to allow for @VAR and @(...) forms inside
+	nested lists. This is in anticipation of future features.
+
+	* lib.c (expr_s): New symbol variable.
+	(obj_init): expr_s initialized.
+
+	* lib.h (expr_s): Declared.
+
+	* match.c (dest_bind): Now takes linenum. Tests for the meta-syntax
+	denoted by the system symbols var_s and expr_s, and throws an
+	error.
+	(eval_form): Similar error checks added. Also, hack: do not add
+	file and line number to an exception which begins with a '('
+	character; just re-throw it. This suppresses duplicate line
+	number addition when this throw occurs across some nestings.
+	(match_files): Updated calls to dest_bind.
+
+	* parser.l (yybadtoken): Handle new token kind, METAVAR and METAPAR.
+	(grammar): Refactoring among patterns: TOK broken into
+	SYM and NUM, NTOK introduced, unused NUM_END removed.
+	Rule for @( producing METAPAR in nested state.
+
+	* parser.y (METAVAR, METAPAR): New tokens.
+	(meta_expr): New nonterminal.
+	(expr): meta_expr and META_VAR productions handled.
+
+2011-10-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	Renaming the currying combinators according to new scheme.
+
+	* lib.c (bind2): Function renamed to curry_12_2.
+	(bind2other): Function renamed to curry_12_1.
+	(do_bind_2, do_bind2other): Helpers renamed likewise.
+	(tree_find): Follows rename of bind2.
+
+	* match.c (match_files): deffilter code follows bind2 rename
+	to curry_12_2.
+
+2011-10-06  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (funcall3, curry_123_2): New functions.
+	(do_curry_123_2): New static function.
+
+	* lib.h (funcall3, curry_123_2): Declared.
+
+	* match.c (subst_vars): Bugfix: throw error on unbound variable instead
+	of ignoring the situation. This bug caused unbound variables in
+	quasiliterals to be silently ignored.
+	(eval_form): Function changed to three argument form, so that
+	it takes a line number for reporting errors. Restructured to catch
+	the new unbound variable exception from subst_vars, and re-throw
+	it with a line number. Also, throws exception now instead of returning
+	nil if itself it detets an unbound variable. Uses of eval_form
+	no longer have to test the return value for nil, but just assume
+	it worked.
+	(match_lines): Currying calls to eval form updated to use
+	curry_123_2. Test of eval return value eliminated. In function
+	calls, eval isn't used for reducing symbol arguments to values,
+	because it now throws in the unbound case, and it's not worth
+	setting up a catch for this. Instead, assoc is used directly.
+
+2011-10-05  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_files): In function calls, the deletion of
+	the unbound variable from the argument list can be done
+	with a destructive operation since that list is a copy.
+
+2011-10-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* LICENSE, Makefile, configure, filter.c, filter.h, gc.c, gc.h, hash.c,
+	hash.h, lib.c, lib.h, match.c, match.h, parser.h, parser.l, parser.y,
+	regex.c, regex.h, stream.c, stream.h, txr.1, txr.c, txr.h, unwind.c,
+	unwind.h, utf8.c, utf8.h: Updated e-mail address.
+
+2011-10-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_line, match_files): Another correction to how bindings
+	are handled in collect/coll. New bindings from the main clause and
+	last clause must override old bindings. This is done by some
+	additional set difference operations based on symbol identity.
+	Otherwise it is possible to end up with multiple bindings for the
+	same symbol, which is untidy. If the collect clause scrubs a variable
+	with forget and re-binds it, then combining that environment 
+	with the previous bindings will create a duplicate.
+	Also, fixed a serious bug with the bindings from the last clause;
+	the append was wrongly put into the loop that processes the collected
+	lists.
+
+2011-10-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (acons): New function.
+	(set_diff): Optimize common case: list1 and list2
+	are the same, or list2 is substructure of list1.
+	Situations in which this won't be the case for variable bindings are
+	rare.
+
+	* lib.h (acons): Declared.
+
+	* match.c (match_line): Use acons rather than acons_new, when binding
+	variables that we know are new (the symbol is unbound). 
+	When computing the set difference over bindings, use cons cell
+	equality, rather than symbol equality. Symbol equality is wrong
+	because a binding can be removed, and then a new binding can be
+	introduced using the same symbol. This must be treated as
+	a different binding.
+
+2011-10-04  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfixes to the semantics of binding environments, which
+	were broken in the face of deletions (local, forget).
+	For some stupid reason, I had written a destructive routine for
+	removing elements from an association list, and used it
+	as the basis for the local and forget directives.
+
+	* lib.c (eq_f, car_f): New variables.
+	(identity_tramp, equal_tramp): Obsolete functions removed.
+	(apply): Broken function disabled at run time.
+	(funcall, funcall1, funcall2): Throw meaningful error instead
+	of aborting.
+	(alist_remove_test): New static function.
+	(alist_remove, alist_remove1): Rewritten to be functional
+	rather than destructive.
+	(alist_nremove, alist_nremove1): Destructive functions,
+	using previous implementations of alist and alist_nremove.
+	(do_sort): Recurses directly rather than via sort. That was
+	probably why this helper was introduced!
+	(find, set_diff): New functions.
+	(obj_init): gc-protect new variables eq_f and car_f, and initialize
+	them. Initializations for equal_f and identity_f changed to
+	use equal and identity directly, without the obsolete wrappers.
+
+	* lib.h (eq_f, car_f, alist_nremove, alist_nremove1,
+	find, set_diff): Declared.
+
+	* match.c (match_line): Use set_diff to determine what bindings
+	are new, rather than ldiff and ldiff-like logic which break when
+	the new bindings do not share structure with the old.
+	(match_files): Likewise.
+
+2011-10-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Starte dodcumenting the forgotten merge directive.
+
+2011-10-03  Kaz Kylheku  <kaz@kylheku.com>
+
+	Implemented new last clause for collect and coll.
+	Bugfix in cases inside coll: was not collecting bindings.
+	Bugfix for until inside coll: was not seeing bindings
+	from main clause.
+
+	* lib.c (ldiff): New function.
+
+	* lib.h (ldiff): Declared.
+
+	* match.c (match_line): Implemented last clause. Fixed cases
+	handling by moving misplaced termination check.
+	(match_files): Implemented last clause.
+
+	* parser.y (until_last): New nonterminal symbol.
+	(collect_clause): Refactored syntax to support until and last.
+	(elem): Likewise.
+
+	* txr.1: Updated.
+
+2011-10-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (rep_elem): Bugfix: forgotten o_elems_transform on
+	syntax tree of o_elems constituent, leading to problems with
+	consecutive variables in a @(rep).
+
+2011-10-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_line): Handle trailer_s directive.
+	(match_files): Remove check against trailer_s not having trailing
+	material. If it doesn't, it's a vertical directive processed here,
+	otherwise leave it alone so match_line processed it.
+
+2011-10-02  Kaz Kylheku  <kaz@kylheku.com>
+
+	Compiles as C++ again.
+
+	* lib.h (cons_set): New macro.
+
+	* match.c (match_line, match_files): In collect clause handlers,
+	move variable declarations above goto, and initialize with
+	cons_set, instead of declaring and initializing with cons_bind.
+	This eliminates the stupid C++ error that goto skips a variable
+	initialization (which happens even when it can be trivially
+	proven that the has no next use at the goto site!)
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 038
+
+	New eof directive.
+
+	Fixes in skip directive to work very well with eof.
+
+	Consecutive variable matching semantics improved; concept of double
+	variable match introduced for unbound variable followed by
+	regex variable.
+
+	Directives collect and coll have keyword arguments for more control
+	over their behavior.
+
+	Parallel directives (all, some, none, ...) are available in
+	horizontal mode.
+
+	New choose directive for selecting one of numerous alternatives
+
+	GC bugfix in new filtering code.
+
+	The code has an issue compling with GNU C++ instead of C,
+	which is something that is supported by this project.
+	Not a release-blocking issue. Not easy to fix without
+	restructuring some code.
+
+	* txr.c (version): Bumped.
+
+	* txr.1: Bumped version and set date.
+
+	* configure (txr_ver): Bumped.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Maintaining C++ compiling (except for two issues that will
+	need another commit).
+
+	* filter.c: Include "gc.h" for prototype of protect.
+	(struct filter_pair): Use const wchar_t *, so we can assign
+	literals.
+	(html_hex_continue): Ditto.
+
+	* lib.c (and): Function renamed to andf, since and is a C++
+	operator.
+
+	* lib.h (and): Declaration renamed.
+
+	* match.c (match_files): Use of and updated to andf.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	HACKING: Clarified that --vg-debug is also needed to turn on on
+	the Valgrind support at run-time, in addition to building it in.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	New test case, covering some filtering from HTML/XML.
+
+	* Makefile: Defined TXR_ARGS for new test case.
+
+	* tests/008/students.expected: New file.
+	* tests/008/students.txr: New file.
+	* tests/008/students.xml: New file.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* filter.c (filters, filter_init): Serious gc bug fixed: neglected to
+	inform the garbage collector about the filters global variable.
+	Ouch!
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	New test case under tests/008.
+
+	* Makefile: Made previous TXR_ARGS for 008 specific
+	to tokenizing test case, and introduced separate TXR_ARGS
+	for this test case.
+
+	* tests/008/configfile: New file.
+
+	* tests/008/configfile.expected: New file.
+
+	* tests/008/configfile.txr: New file.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Tokenizing test case, exercising for @(coll :gap 0)
+	and horizontal @(choose :shortest ...).
+
+	* Makefile: Defined TXR_ARGS for tests/008 directory.
+
+	* tests/008/data: New file.
+	* tests/008/tokenize.expected: New file.
+	* tests/008/tokenize.txr: New file.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	New test case, covering exception handling across nested
+	function invocations.
+
+	* Makefile (TEST): Test targets marked as .PHONY, because they are.
+
+	* tests/007/except-1.expected: New file.
+	* tests/007/except-1.txr: New file.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y (all_clause, some_clause, none_clause, maybe_clause,
+	cases_clause, choose_clause, elem): Regression bug fix: bad list calls
+	in parser, lacking nao terminator.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	Regression bug fix: longest match variables broken by
+	2011-09-28 commit which introduced the double var match.
+
+	* match.c (match_line): Handle case where modifier is t.
+
+	* parser.y (var_op): Produce modifir as (t) rather than t.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Documented choose and horizontal mode for paralle
+	constructs.
+
+2011-10-01  Kaz Kylheku  <kaz@kylheku.com>
+
+	New directive: choose.
+
+	* match.c (choose_s, longest_k, shortest_k): New variables.
+	(match_line, match_files): Introduced choose directive.
+	(match_init): Initialize new variables.
+
+	* match.h (choose_s): Declared.
+
+	* parser.l (yybadtoken): Handle CHOOSE.
+	(CHOOSE): Clause added for returning this token.
+
+	* parser.y: Added #include "match.h".
+	(CHOOSE): New token symbol.
+	(choose_clause): New nonterminal symbol.
+	(clause): choose_clause added.
+	(all_clause, some_clause, none_clause,  maybe_clause,
+	cases_clause): Abstract syntax tree tweaked.
+	(choose_clause): New syntax.
+	(elem): Abstract syntax trees tweaked for many clauses.
+	New CHOOSE clauses.
+	(out_clause): New error case for choose_clause.
+
+2011-09-30  Kaz Kylheku  <kaz@kylheku.com>
+
+	* HACKING: Updated with debugging hints.
+
+2011-09-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* txr.1: Clarified consecutive variables and documented double
+	variable match.
+
+2011-09-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.l: Implemented backslash continuations in SPECIAL
+	state, regexes and string literals.
+
+	* txr.1: Documented.
+
+2011-09-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_line): Implemented horizontal all, some,
+	none, maybe and cases directives.
+	(match_files): Recognize horizontal version of these directives
+	by the presence of the extra symbol t and do not process.
+	Also, bugfix in the all directive: not resetting the
+	all_match flag when short circuiting out.
+	* parser.y (clause_parts_h, additional_parts_h): New nonterminals.
+	(elem): New clauses added.
+
+2011-09-29  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (chars_k): New variable.
+	(match_line): Keyword arguments in coll implemented.
+	(match_init): chars_k variable initialized.
+
+	* parser.l (COLL): Lexical syntax changed to allow for
+	argument material.
+
+	* parser.y (elem): Coll syntax rewritten for arguments.
+
+	* txr.1: Updated.
+
+2011-09-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (mingap_k, maxgap_k, gap_k, times_k, lines_k): New
+	symbol variables.
+	(match_lines): Keyword arguments in collect implemented.
+	(match_init): New function.
+
+	* match.h (match_init): Declared.
+
+	* parser.l (COLLECT): Lexical syntax changed for COLLECT to
+	allow for argument material.
+
+	* parser.y (%union): obj renamed to val.
+	(exprs_opt): New nonterminal.
+	(collect_clause): Rewritten for arguments.
+
+	* txr.c (main): Call to match_init introduced.
+
+2011-09-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_line): Bugfix in double var. Do not
+	prepend the next_pat to the specline if it is nil.
+
+2011-09-28  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_line): Logic restructured to allow for
+	regex variables which also have nested variables.
+	Previously this code was assuming that the cases were
+	mutually exclusive, and the parser happened to work that way.
+	Also, added support for a "double var" match which occurs
+	when an unbound variable is followed by a regex variable.
+	This case should be allowed because it makes sense.
+	It's similar to a variable followed by a regex, except
+	that the regex is also a variable binding.
+
+	* parser.y (o_elems_transform): New function.
+	(o_elems_opt, o_elems_opt2, quasilit): Transform o_elems with new
+	function. This is needed because subst_vars doesn't
+	deal with the nested var syntax for consecutive variables.
+	(var): New syntax case '{' IDENT exprs '}' elem. This
+	allows consecutive variables to be nested in all cases.
+
+2011-09-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y ('{', '}'): Nope, still not right.
+	These must have exactly the same precedence as
+	IDENT for this to work right, of course.
+
+2011-09-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* parser.y ('{', '}'): Bugfix: precedence of these
+	terminals was causing @foo@foo to be parsed differently
+	from @foo@{foo}. We need consecutive variables to be
+	specially folded in the syntax under a single var_s
+	node.
+
+2011-09-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_files): One more fix to this, argh.
+	The test for !data should be done after matching,
+	before incrementing to the next line. Then it is a true
+	bottom of the loop test. This commit allows
+	@(skip)
+	@first_line
+	@(skip nil 3)
+	@(eof)
+	to correctly match the first line of the input, not
+	the fourth one from the bottom, since the
+	second skip has an unbounded range.
+
+2011-09-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_files): Another bugfix to skip.
+	If a hard skip tries to go beyond EOF, then the query
+	must fail. However, a skip to exactly EOF is fine.
+	I.e. data can hit nil at the same time as the right
+	number of skip iterations is performed.
+
+2011-09-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_files): Bugfix in skip directive.
+	We should try the match at least once even if there is no data
+	after a hard skip, so that the query has an opportunity
+	to do an explicit match for no data, as with @(endp).
+	This commit makes possible queries like:
+	@fourth_line_from_bottom
+	@(skip 1 3)
+	@(eof)
+	This query depends on @(skip 1 3) not failing when
+	it runs out of data, because @(eof) checks for htis.
+
+2011-09-27  Kaz Kylheku  <kaz@kylheku.com>
+
+	* lib.c (eof_s): New symbol variable.
+	(obj_init): New variable initialized.
+
+	* lib.h (eof_s): Declared.
+
+	* match.c (match_files): New @(eof) directive explicitly
+	matches end of data.
+
+	* txr.1: Updated.
+
+2011-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 037
+
+	Short-circuiting behavior for @(all) and @(none).
+
+	Obsolete forms of @(next) and @(output) syntax are gone.
+
+	New filtering feature for substitutions in output.  Filtering to and
+	from HTML built in, plus user-defined filtering with deffilter.
+
+	Bugfixes: wrong error message in throw; lack of support for escaping
+	backslashes in literals and regexes.
+
+	* txr.c (version): Bumped to 037.
+
+	* txr.1: Set version to 037 and bumped date.
+
+	* configure: Bumped txr_ver to 037.
+
+2011-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support &#NNNN; decimal escapes also.
+
+	* filter.c (html_hex_continue): Bail with nil if no digits
+	are collected. The &#x; syntax is not translated to anything.
+	(html_dec_continue): New function.
+	(html_hex_handler): Function renamed to html_numeric_handler.
+	(filter_init): Change function-based trie node over to
+	html_numeric_handler.
+
+2011-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Support &#xNNNN; hex escapes in html.  Bugfix in field formatting.
+	chr function inlined.
+
+	* filter.c (trie_value_at, trie_lookup_feed_char): Handle function
+	case.
+	(build_filter): New parameter, compress_p.
+	(html_hex_continue, html_hex_handler): New functions.
+	(filter_init): Add a function-based node to the from_html trie.
+
+	* lib.c (chr): Function removed.
+	(functionp) New function.
+
+	* lib.h (chr): Declaration replaced with inline function.
+	(functionp): Declared.
+
+	* match.c (format_field): Bugfix: failed to apply filter
+	that came in as an argument.
+
+2011-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Bugfixes: Consistent escaping in various literals. Double
+	backslash codes for single backslash. Output clause can be empty.
+
+	* parser.l (char_esc): Backslash handled.
+	Use internal_error rather than abort.
+	(REGCHAR, LITCHAR): Backslash added to lexical syntax.
+
+	* parser.y (output_clause): Allow empty output clause.
+
+2011-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	New feature: @(deffilter)
+
+	Bugfix in @(throw) when non-symbol is thrown: exception message
+	referred to the symbol throw rather than the erroneous object.
+
+	* filter.c (build_filter_from_list, register_filter): New functions.
+
+	* filter.h (register_filter): New function declared.
+
+	* lib.c (deffilter_s): New variable defined.
+	(chain): Function changed from single list argument to variable
+	argument list to reduce the complexity of use.
+	(do_and, and): New functions.
+	(obj_init): deffilter_s initializatio added.
+
+	* lib.h (deffilter_s, and): New declarations.
+	(chain): Declaration updated to new function signature.
+	(eq): Changed from macro to inline function.
+
+	* match.c (do_output_line): Simplified expression involving chain.
+	(do_output): Likewise.
+	(match_files): Bugfix in error handling of throw.
+	Implementation of deffilter.
+
+	* txr.1: Documented deffilter.
+
+2011-09-26  Kaz Kylheku  <kaz@kylheku.com>
+
+	Trie compression. Hash table iteration.
+	Bugfix in typeof.
+
+	* filter.c (trie_compress): New function.
+	(trie_value_at, trie_lookup_feed_char, filter_string): Handle cons cell
+	nodes in trie.
+	(build_filter): Call trie_compress.
+
+	* gc.c (cobj_destroy_op): Function renamed to cobj_destroy_stub_op
+	since it doesn't do anything.
+	(cobj_destroy_free_op): New function.
+	* hash.c (struct hash_iter): New type.
+	(hash_destroy): Function removed.
+	(hash_ops): Reference to hash_destroy replaced with
+	cobj_destroy_free_op.
+	(hash_count, hash_iter_mark, hash_begin, hash_next): New functions.
+	(hash_iter_ops): New static structure.
+	* hash.h (hash_count, hash_begin, hash_next): New functions declared.
+	* lib.c (hash_iter_s): New symbol variable.
+	(typeof): Bugfix: TAG_LIT type tag not handled.
+	(vecref): New function.
+	(obj_init): Initialize hash_iter_s.
+	* lib.h (cobj_destroy_op): Declaration renamed.
+	(cobj_destroy_free_op, vecref): New functions declared.
+	(hash_iter_s): New variable declared.
+	* stream.c (string_in_ops, byte_in_ops): cobj_destroy_op
+	renamed to cobj_destroy_stub_op.
+
+2011-09-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Filtering from HTML implemented.
+
+	* filter.c (from_html_k): New variable.
+	(to_html_table): New static array.
+	(filter_init): Intern new symbol. Instantiate new filter
+	and store in filters hash.
+
+2011-09-25  Kaz Kylheku  <kaz@kylheku.com>
+
+	Filtering feature for variable substitution in output.
+
+	* filter.c, filter.h: New files.
+
+	* Makefile (OBJS): filter.o added.
+
+	* gc.c (mark_obj): Mark new alloc field of string objets.
+
+	* hash.c (struct hash): New member, userdata.
+	(hash_mark): Mark new userdata member of hash.
+	(make_hash): Initialize userdata.
+	(get_hash_userdata, set_hash_userdata, hashp): New functions.
+
+	* hash.h (get_hash_userdata, set_hash_userdata, hashp): New functions
+	declared.
+
+	* lib.c (getplist, string_extend, cobjp): New functions.
+	(string_own, string, string_utf8): Initialize new alloc field to nil.
+	(mkstring, mkustring): Initialize new alloc field to actual size.
+	(length_str): When length is computed and cached, also compute
+	and cache alloc.
+	(init): Call filter_init.
+
+	* lib.h (string string): New member, alloc.
+	(num_fast): Macro converted to inline function.
+	(getplist, string_extend, cobjp): New functions declared.
+
+	* match.c (match_line): Follows change of modifier s-exp syntax.
+	(format_field): New parameter, filter.
+	New modifier syntax parsed. Filter retrieved, and applied.
+	(subst_vars): New parameter, filter. Filter is either applied
+	in this function or passed to format_field, as needed.
+	(eval_form): Pass nil to new parameter of subst_vars.
+	(do_output_line): New parameter, filter. Passed down to subst_vars.
+	(do_output): New parameter, filter. Passed down to do_output_line.
+	(match_files): Pass nil filter to subst_vars in cat directive.
+	Output directive refactored to parse keywords, extract the
+	filter and pass down to do_output.
+
+	* parser.y (regex): Generate (sys:regex regex syntax ...)
+	instead of (regex syntax ...).
+	(elem, expr): Updated w.r.t. regex syntax change.
+	(var): Cases '{' IDENT regex '}' and '{' IDENT NUMBER '}'
+	are removed. new syntax '{' IDENT exprs '}' to handle these
+	more generally and allow for keywords.
+
+	* txr.1: Updated.
+
+2011-09-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Numeric constants become real constants.
+
+	Vector code cleanup.
+
+	* lib.h (zero, one, two, negone, maxint, minint): Extern declarations
+	removed, macros introduced for these identifiers.
+
+	* lib.c (zero, one, two, negone, maxint, minint): File scope
+	definitions removed.
+	(vector): Use vec_alloc and vec_fill enums instead of constants.
+	(obj_init): Remove references to removed definitions.
+
+2011-09-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* LICENSE, Makefile, configure, gc.c, gc.h, hash.c, hash.h, lib.c,
+	lib.h, match.c, match.h, parser.h, parser.l, parser.y, regex.c,
+	regex.h, stream.c, stream.h, txr.1, txr.c, txr.h, unwind.c, unwind.h,
+	utf8.c, utf8.h: Updated copyright year.
+
+2011-09-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c, parser.y: Support for old output syntax removed.
+	Leading :nothrow with trailing material is an error now.
+
+	* txr.1: Updated. Made note of errors in pipes being asynchronous.
+
+2011-09-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* tests/002/query-1.txr: Old next syntax rewritten to new.
+
+2011-09-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	* match.c (match_files): Some cleanup in preparation of new
+	features. Support for obsolescent @(next) syntax is gone.
+
+2011-09-23  Kaz Kylheku  <kaz@kylheku.com>
+
+	Semantics tweak: short circuiting behavior for @(all) and @(none).
+
+	* match.c (match_files): Added a couple of break statements.
+
+	* txr.1: Updated.
+
+2011-09-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Version 036
+
+	Extension to @(skip).
+
+	* txr.c (version): Bumped to 036.
+
+	* txr.1: Set version to 036.
+
+	* configure: Bumped txr_ver to 036.
+
+2011-09-22  Kaz Kylheku  <kaz@kylheku.com>
+
+	Useful second argument in skip directive for skipping
+	a minimum number of lines.
+
+	* match.c (match_files): New behavior in skip_s case.
+
+	* txr.1: Documented.
+
+2010-10-05  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 035
+
+	Fixes garbage-collection-related problem affecting @(freeform)
+	that was revealed by "make tests" on x86-64 system, gcc 4.3.2.
+
+	Fixes show-stopper stupidity, again: a query that matches 
+	the end of data terminates successfully rather than failing.  This
+	is because version 032 did not properly address the breakage
+	introduced in the 2010-01-21 change to match.c involving the dataline
+	variable. The "fix" only prevented the program from aborting in that
+	situation.
+
+	* txr.c (version): Bumped to 035.
+
+	* txr.1: Set version to 035.
+
+	* configure: Bumped txr_ver to 035.
+
+2010-10-04  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_files): Bugfix. A (sub)query that runs out of data
+	lines to match must fail. Extra data lines relative to the spec
+	are tolerated; extra spec lines unmet by data aren't.
+
+2010-10-03  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.h (lazy_string): Fix incorrect comment.
+
+	* lib.c (split_str, split_str_set): It is necessary to protect input
+	parameters against GC, because we cache their internal pointers,
+	after which we no longer refer to the objects themselves. Moreover,
+	we perform object allocation, and then keep using the internal
+	pointers.
+
+2010-09-30  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Fix formatting problem.
+
+2010-03-01  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Fix inaccuracies: files are not read into memory all at
+	once, and a query doesn't execute if it had errors.
+
+2010-02-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 034
+
+	Patched up broken @(freeform) directive.
+
+	* txr.c (version): Bumped to 034.
+
+	* txr.1: Set version to 034.
+
+	* configure: Bumped txr_ver to 034.
+
+2010-02-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New testcases for freeform.
+
+	* tests/006/data: New UTF-8 file.
+
+	* tests/006/freeform-1.txr: Likewise.
+
+	* tests/006/freeform-1.expected: Likewise.
+
+	* tests/006/freeform-2.txr: Likewise.
+
+	* tests/006/freeform-2.expected: Likewise.
+
+	* Makefile (TXR_ARGS): New target-specific assignment to set
+	data for test case set 006.
+
+2010-02-27  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (length_str_gt, length_str_ge, length_str_lt, length_str_le):
+	Added missing support for literal string type.
+
+2010-02-27  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (search_str): Bugfix for empty haystack case: checks for end
+	of string must use postincrement on the index, otherwise the access
+	goes past the null terminator.
+
+2010-02-27  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_lines): Bugfix in freeform directive.
+	If the virtual line is partially matched, the remainder of
+	the line is folded back into list form. In this case, the
+	data line number must be incremented. Otherwise the calling
+	context may conclude that no progress was made, and
+	skip a line of input. I.e. the unmatched part of the input
+	is a new line, even if there had originally
+	been no line break at that point.
+
+2010-02-27  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.h (split_str_sep): Declared.
+
+	* lib.c (split_str_sep): New function. 
+	(split_str): Semantics changed; the second argument
+	is not a set of separator characters (like in split_str_sep)
+	but rather a separator string. Fixed bug: if the input
+	string is empty, the output list is empty. This caused
+	infinite looping behavior in @(freeform).
+
+2010-02-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (init_str): Bugfix: copy only len characters, not len + 1, so
+	that we don't clobber the null terminator in the target string, or try
+	read past the end of the source data.  This affects the @(freeform)
+	directive.
+
+2010-01-26  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 033
+
+	Addressed exponential memory behaviors
+	in derivative-based regex matching.
+
+	* txr.c (version): Bumped to 033.
+
+	* txr.1: Set version to 033.
+
+	* configure: Bumped txr_ver to 033.
+
+2010-01-26  Kaz Kylheku  <kkylheku@gmail.com>
+
+	hash.c (hash_process_weak): There is no point in fixing up
+	the type codes of spuriously reached nodes; reached objects
+	will not be removed by weak processing and so it's better
+	to just detect those situations and short-circuit.
+
+2010-01-26  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Optimization in derivative-based regex engine.
+	Exponential memory consumption behavior was observed when
+	matching the input aaaaaa....
+	against the regex a?a?a?a?....aaaa....
+	The fix is to eliminate common subexpressions
+	from the derivative for the or operator.
+
+	* lib.c (memqual, mapcon): New functions
+
+	* lib.h (memqual, mapcon): Declared.
+
+	* regex.c (flatten_or, unflatten_or,
+	unique_first, reduce_or): New functions.
+	(reg_derivative): Apply reduce_or
+	to the constructed disjunction.
+
+2010-01-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fixing weak hash tables.
+
+	* gc.c, gc.h (REACHABLE, FREE): Moved to header.
+
+	* hash.c (hash_mark): Fix broken list push code.
+	(has_process_weak): Defend against conservative
+	garbage collector. We cannot trust that the
+	conses which make up the chain backbone
+	and hash entry pairs are unmarked, because the
+	hash vectors might be reached through
+	spurious references.
+
+2010-01-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 032
+
+	Fix showstopper stupidity.
+
+	* match.c (match_files): Fix incorrect change involving dataline
+	variable made on 2010-01-21; failure to check for end of data.
+
+	* txr.c (version): Bumped to 032.
+
+	* txr.1: Set version to 032.
+
+	* configure: Bumped txr_ver to 032.
+
+2010-01-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 031
+
+	Addresses some spurious object retention problems related to the GC's
+	conservative scan of the stack.
+
+	* txr.c (version): Bumped to 031.
+
+	* txr.1: Set version to 031.
+
+	* configure: Bumped txr_ver to 031.
+
+2010-01-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_files): Workaround for GC issue
+	discovered on Red Hat EL 4 with gcc 3.4.3.
+	In the collect loop, set car(success) to nil.
+	Somehow the generated code hangs on to the last
+	matching position for a regex, preventing GC.
+
+2010-01-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* stream.c (vformat_num): Fix bad width calculation.
+
+2010-01-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fix for unbounded memory growth problem reproduced with GCC 4.4.1
+	on 32 bit x86 Fedora. This happens because the lazy list variable
+	``data'' in the match_files function is optimized to a register,
+	but a stale value of that variable persists in the backing storage.
+
+	* gc.h (gc_hint): New macro.
+	(gc_hint_func): Declared.
+
+	* gc.c (gc_hint_func): New function.
+
+	* match.c (match_files): Use gc_hint on the data lazy list.
+
+2010-01-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_files): Reduce scope, and bogus use of, dataline
+	variable.
+
+2010-01-19  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 030
+
+	Fixed grammar conflicts.
+
+	R1~R2 syntax supported in regexes.
+
+	* txr.c (version): Bumped to 030.
+
+	* txr.1: Set version to 030.
+
+	* configure: Bumped txr_ver to 030.
+
+2010-01-19  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.y (regex): Getting rid of empty '/' '/' production
+	again.
+	(regexpr): Re-introducing empty production; this time using
+	%prec LOW trick to give this interpretation the lowest
+	possible precedence. Thus expressions like /&/ work again.
+	(regbranch): New production to allow R1~R2 to be valid.
+
+	* txr.1: Documented.
+
+2010-01-19  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.l (grammar): The ^ character is no longer considered
+	a special regex token, just a regular character.
+
+	* parser.y (LOW): New phony terminal symbol, used as place holder
+	for lowest precedence.
+	(grammar): Fixed numerous conflicts in regex section by refactoring.
+	The regex nonterminal no longer has an empty derivation.
+	A regex character class no longer has an empty derivation; this is
+	handled by special rules. Ambiguity around ^ is resolved; this is
+	parsed as a regular character and specially recognized.
+	Ambiguity between catenation of terms and postfix operators
+	resolved in favor of shift by giving catenation low
+	precedence using %prec LOW.
+
+2010-01-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 029
+
+	Performance optimizations of derivative-based regexes.
+
+	New syntax: [] and [^].
+
+	Saner semantics for % operator.
+
+	* txr.c (version): Bumped to 029.
+
+	* txr.1: Set version to 029.
+
+	* configure: Bumped txr_ver to 029.
+
+2010-01-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* regex.c (reg_derivative_list, reg_derivative): Recognition
+	of cases to reduce consing. In reg_derivative_list, we avoid
+	consing the full or expression if either branch is t, and
+	also save a cons when the first element has a null derivative.
+	In reg_derivative the oneplus and zeroplus cases are split,
+	since zeroplus can re-use the input expression, when it's
+	just a one-character match, deriving nil.
+
+2010-01-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Adjust semantics of non-greedy operator R%S, to avoid the broken
+	case whereby R%S matches nothing at all when S is not empty
+	but equivalent to empty, or more generally when S is nullable.
+	A much nicer definition is ``the intersection of R* and
+	the set of all strings that do not contain a non-empty substring
+	that matches S, followed by S''.
+
+	* regex.c (dv_compile_regex): Adjust syntactic sugar for the %
+	operator, taking advantage of the reg_nullable function to keep the
+	simpler syntactic sugar for cases where S is not nullable.
+
+	* txr.1: Document accordingly.
+
+2010-01-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.y (regterm, regclass): Relocate handling
+	of empty [] into regterm, via empty derivation.
+
+2010-01-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Regex syntactic tweaks: support the [] syntax
+	to match no character and [^] as its complement,
+	being synonymous with the wildcard dot.
+
+	* parser.y (regterm): Added new productions.
+
+	* txr.1: Documented.
+
+2010-01-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 028.
+
+	Code cleanup.
+
+	New additional regex implementation using regex derivatives,
+	providing new operators: regex complement, intersection,
+	non-greedy match.
+
+	Regex syntax bugfixes.
+
+	* txr.c (version): Bumped to 028.
+
+	* txr.1: Bumped version to 028.
+
+	* configure: Bumped txr_ver to 028.
+
+	* match.c (dest_bind): Remove spurious syntax.
+
+2010-01-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Get rid of parens from regex operator descriptions.
+	Correct wrong text: all operators can take an empty regex.
+	Clarify escaping rules within a character class.
+	Describe Kleene and non-greedy behavior more accurately.
+
+2010-01-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* genman.txr, txr.1: Encode version differently; extract
+	from text during HTML conversion.
+
+2010-01-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Automate the maintenance of the HTML-ized man page.
+
+	* Makefile (txr-manpage.html): New target, generated from txr.1
+	man page.
+
+	* genman.txr: New txr query to transform the output of man2html.
+
+2010-01-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Implemented non-greedy operator.
+
+	* lib.c (nongreedy_s): New symbol globals.
+	(obj_init): New symbol interned.
+
+	* lib.h (nongreedy_s): Declared.
+
+	* parser.l (grammar): Support % as a regex operator.
+
+	* parser.y (grammar): Define '%' nonterminal,
+	on th esame precedence level as '*'.
+	(regterm): Add the % expression as a term.
+	(regchar): Recognize % as ordinary character in a character
+	class. Also, bugfix: recognize & and ~ similarly.
+
+	* regex.c (dv_compile_regex): Implement % as a syntactic sugar
+	via an algebraic transformation to a more complex expression.
+	(regex_requires_dv): A regex containing the % operator requires
+	derivatives.
+
+	* txr.1: Documented %; moved exotic regex notes to end of document.
+
+2010-01-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* regex.c (reg_derivative_list): Bugfix: wrong algebra,
+	taking a double derivative of the first item.
+
+2010-01-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Fix accidental edit garbage.
+
+2010-01-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Fix accidental .b, which should have been .B.
+	Revised description of regex operators. Added section
+	on intersection and complement, which may not be familiar
+	to regex users.
+
+2010-01-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* regex.c (reg_derivative): Bugfix: remove invalid
+	algebraic reductions in the derivative for the or operator.
+
+2010-01-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Bugfix: allow unescaped / to be used in regex character classes.
+
+	To do this, we no longer make the lexer look for the terminating
+	slash which ends the regex syntax. This is driven by the parser,
+	which calls a special function in the lexer to indicate that
+	the regex parsing is done.
+
+	* parser.h (end_of_regex): New function declared.
+
+	* parser.l (REGCLASS): Unused start condition removed.
+	(grammar): A slash character in the REGEX start condition is now simply
+	returned as an operator token; no popping of the state stack takes
+	place. The scanner stays in REGEX mode.
+	(end_of_regex): New function.
+
+	* parser.y (regex): Call end_of_regex when a regex is successfully
+	scanned through to terminating slash, or if a syntax error occurs.
+	(regchar): Can derive a / terminal now, thus including it in a
+	regex character class.
+
+2010-01-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.y (precedence): bugfix: character classes like this [^*]
+	being treated as a non-complemented set of two characters.
+
+2010-01-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Dynamically determine which regex implementation to use:
+	NFA or derivatives. The default behavior is NFA, with
+	derivatives used if the regular expression contains
+	uses of complement or intersection. The --dv-regex
+	option forces derivatives always.
+
+	* regex.c (opt_derivative_regex): Default value is 0 now.
+	(regex_requires_dv): New function.
+	(regex_compile): If regex_requires_dv function reports
+	true, or if the opt_derivative_regex flag is true,
+	treat the regex with the derivative-based implementation.
+
+	* txr.c (txr_main): Implemented --dv-regex option
+	to set the opt_derivative_regex flag.
+
+2010-01-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.h (c_num): Remove redundant declaration.
+
+2010-01-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Impelement derivative-based regular expressions.
+
+	* lib.c (chset_s, compiled_regex_s): New symbol globals.
+	(obj_init): New symbols interned.
+
+	* lib.h (chest_s, compiled_regex_s): Declared.
+
+	* match.c (match_line, match_files): Use regexp predicate
+	function instead of typeof for detecting regex.
+
+	* parser.y (regexpr, regbranch, regterm): Minor syntactic refactoring.
+
+	* regex.h (union nfa_state, nfa_state_t, struct nfa, enum nfam_result,
+	nfa_machine_t, nfa_compile_regex, nfa_free, nfa_run,
+	nfa_machine_reset, nfa_machine_init, nfa_machine_cleanup,
+	nfa_machine_feed, nfa_machine_match_span, regex_nfa): Declarations
+	for internal material removed from header, some moved into regex.c.
+
+	* regex.c: Includes txr.h now to get declaration of new option global.
+	(union nfa_state, nfa_state_t, struct nfa,
+	nfa_compile_regex, nfa_free, nfa_run, regex_nfa): Declarations
+	moved from regex.h.
+	(enum nfam_result, nfa_machine_reset, nfa_machine_init,
+	nfa_machine_cleanup, nfa_machine_feed, nfa_machine_match_span):
+	Renamed from nfam_* and nfa_machine_* to regm_* and regex_machine_*.
+	Functions made static. Regex machine is now polymorphic: the
+	machine is instantiated based on whether the regex is NFA or
+	derivative type, and the behavior of the functions is type dependent.
+	(nfa_machine_t): Renamed to regex_machine_t, now typedef name for union
+	regex_machine.
+	(struct dv_machine, union regex_machine): New types.
+	(struct nfa_machine): New member is_nfa. A few members rearranged,
+	so that union common members are at the start of the structure.
+	(opt_derivative_regex): New global added.
+	(char_set_compile, char_set_cobj_destroy): New function.
+	(char_set_cobj_ops): New static structure.
+	(nfa_compile_set): Refactored to use char_set_compile; made static.
+	(nfa_compile_list): New function.
+	(nfa_compile_regex): Refactored to follow new syntax from parser.y;
+	made static.
+	(nfa_free, nfa_run, regex_nfa): Made static.
+	(dv_compile_regex, reg_nullable_list, reg_nullable,
+	reg_derivative_list, reg_derivative, dv_run): New functions.
+	(regex_compile): Can compile either kind of regex now.
+	(search_regex, match_regex): Decoupled from dependency on NFA
+	implementation.
+
+	* txr.h (opt_derivative_regex): Declared.
+
+	* dep.mk: Regenerated.
+
+2010-01-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Remove incorrect implementation of extended
+	regex operations (complement, intersection).
+	The syntax extensions documentation are retained.
+
+	* regex.c (struct any_char_set, struct small_char_set, struct
+	displaced_char_set): refs field removed.
+	(nfa_kind_t): Removed enum members nfa_super_accept,
+	nfa_reject, nfa_compl_empty, nfa_compl_wild,
+	nfa_compl_single, nfa_compl_set.
+	(nfa_super_accept_state, nfa_is_accept_state): Removed.
+	(char_set_create, char_set_destroy): Reverted.
+	(char_set_clone): Removed.
+	(nfa_state_empty_convert, nfa_state_merge): Reverted.
+	(nfa_compl_state, nfa_compl): Removed.
+	(nfa_compile_regex, nfa_all_states, nfa_closure, nfa_move): Reverted.
+
+2010-01-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Some fine tuning in regex grammar.
+
+	* parser.y (regex): Empty regex handled by
+	allowing regex to generate empty, rather than
+	a special case production for '/' '/'. Thus
+	empty subexpressions are possible.
+	(regbranch, regterm): Complement is handled
+	in regbranch, so that it has lower precedence
+	than aggregation.
+
+2010-01-05  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Implemented the regular expression ~ and & operators.
+	This turns out to be easy to do in NFA land.
+	The complement of an NFA has exactly the same number
+	and configuration of states and transitions, except
+	that the states have an inverted meaning; and furthermore,
+	failed character transitions are routed to an extra
+	state (which in this impelmentation is permanently
+	allocated and shared by all regexes). The regex &
+	is implemented trivially using DeMorgan's.
+
+	Also, bugfix: regular expressions like A|B|C are allowed
+	now by the syntax, rather than constituting syntax error.
+	Previously, this would have been entered as (A|B)|C.
+
+	* lib.c (comp_s, and_s): New symbol globals.
+	(obj_init): New symbols interned.
+
+	* lib.h (comp_s, and_s): Declared.
+
+	* parser.l (grammar): Provide new ~ and & tokens in REGEX state.
+
+	* parser.y (regexpr): Constituents of '|' are regexprs,
+	rather than regbranches (see bugfix note above).
+	The '&' operator is added.
+	(regterm): The '~' operator is added.
+
+	* regex.c (struct any_char_set, struct small_char_set, struct
+	displaced_char_set): refs field added.
+	(nfa_kind_t): New enum members nfa_super_accept,
+	nfa_reject, nfa_compl_empty, nfa_compl_wild,
+	nfa_compl_single, nfa_compl_set.
+	(nfa_super_accept_state): New static structure.
+	(nfa_is_accept_state): New inline function.
+	(char_set_create): Initialize reference count to 1.
+	(char_set_destroy): Decrement refcount, free if zero.
+	(char_set_clone): New function.
+	(nfa_state_empty_convert, nfa_state_merge): Handle nfa_reject state,
+	the complement of nfa_accept.
+	(nfa_compl_state, nfa_compl): New functions.
+	(nfa_compile_regex): Handle new operators.
+	(nfa_all_states, nfa_closure): Handle new state types.
+	(nfa_move): Handle new types according to special rules:
+	the new complemented states that have character transitions have a next
+	move to the super-accept state if they do not match the input
+	character.
+	
+	* txr.1: Documented new regex operators.
+
+2009-12-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (make_package, find_package): Eliminate declaration
+	in the middle of statement block.
+
+	* lib.h (TAG_MASK): Becomes type cnum rather than long.
+	(nao): Based off 1 rather than -1 to avoid left shift of
+	negative number.
+
+2009-12-09  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.l (YYINPUT): Fix signed/unsigned comparison.
+
+2009-12-09  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* hash.c (sethash): New function.
+
+	* hash.h (sethash): Declared.
+
+	* lib.c (cobj_handle): New function.
+
+	* lib.h (cobj_handle): Declared.
+
+2009-12-08  Kaz Kylheku  <kkylheku@gmail.com>
+
+	All COBJ operations have default implementations now;
+	no null pointer check over struct cobj_ops operations.
+
+	New typechecking function for COBJ objects.
+
+	* gc.c (finalize): Assume function pointer destroy
+	is not null.
+	(cobj_destroy_op): New function.
+	(mark_obj): Assume function pointer mark is not null.
+	(cobj_mark_op): New function.
+
+	* hash.c (ll_hash): Assume function pointer hash
+	is not null.
+	(cobj_hash_op): New function.
+	(hash_equal): Function removed.
+	(hash_ops): Replaced hash_equal with cobj_equal_op.
+
+	* lib.c (class_check, cobj_equal_op): New functions.
+
+	* lib.h (cobj_equal_op, cobj_destroy_op, cobj_mark_op,
+	cobj_hash_op): Declarations added.
+	(system_package, user_package, class_check): Declaration added.
+
+	* regex.c (regex_equal): Function removed.
+	(regex_obj_ops): regex_equal replaced with cobj_equal_op.
+
+	* stream.c (common_equal): Function removed.
+	(stdio_ops, pipe_ops, string_in_ops, byte_in_ops,
+	string_out_ops, dir_ops): common_equal replaced
+	with cobj_equal_op, and all previously null
+	function pointers populated with default functions.
+
+2009-12-05  Kaz Kylheku  <kkylheku@gmail.com>
+
+	More void * to mem_t * conversion.
+
+	* stream.c (stdio_put_char_callback, stdio_get_char_callback,
+	stdio_put_string, stdio_put_char, stdio_snarf_line, stdio_get_char):
+	Convert void * to mem_t *.
+
+	* utf8.c (utf8_encode, utf8_decode): Convert void * to mem_t *.
+
+	* utf8.h (utf8_encode, utf8_decode): Update declarations.
+
+2009-12-04  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Eliminate the void * disease. Generic pointers are of mem_t *
+	from now on, which is compatible with unsigned char *.
+	No implicit conversion to or from this type, in C or C++.
+
+	* hash.c (make_hash): Convert void * to mem_t *.
+
+	* lib.c (oom_realloc, chk_malloc, chk_realloc, vec_set_fill,
+	cobj, init): Convert to using mem_t *.
+
+	* lib.h (mem_t): New typedef.
+	(struct cobj): Convert void * to mem_t *.
+	(oom_realloc, chk_malloc, chk_realloc, init): Declarations updated.
+
+	* regex.c (regex_compile): Convert void * to mem_t *.
+
+	* stream.c (snarf_line, string_out_put_string, make_stdio_stream,
+	make_pipe_stream, make_string_input_stream,
+	make_string_byte_input_stream, make_string_output_stream,
+	get_string_from_stream): Convert void * to mem_t *.
+
+	* txr.c (oom_realloc_handler): Convert void * to mem_t *.
+
+2009-12-03  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* gc.c (heap_min_bound, heap_max_bound): New static globals.
+	(more): Update heap_min_bound and heap_max_bound.
+	(in_heap): Do early rejection tests on the pointer. If it's
+	not aligned, or it's completely outside of the bounding
+	box of the heap area, short circuit to false.
+
+2009-12-03  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 027.
+
+	Code cleanup.
+	
+	gc-related bugfix.
+
+	Improved file copying semantics of make install,
+	and adherence for DESTDIR convention.
+
+	* txr.c (version): Bumped to 027.
+
+	* txr.1: Bumped version to 027.
+
+	* configure: Bumped txr_ver to 027.
+
+2009-12-03  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (CFLAGS): Better test for g++, when removing
+	warning options not appropriate for g++. Sometimes
+	g++ may be called something that dosn't end in g++,
+	like g++4.
+
+2009-12-03  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.l (YY_NO_UNPUT): Removed superfluous #define. This is not
+	needed because suppressing generation of unput is requested via
+	the %option. In scanners generated by the legacy version of
+	flex, 2.5.4, still widely in use. this redundancy leads to
+	a multiple #define YY_NO_UNPUT and a compiler warning.
+
+2009-12-03  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fix for failing test suite on MIPS machine, due to
+	gc failing to mark a local variable in txr_main.
+
+	* txr.c (txr_main): Changed from internal linkage to external.
+	This prevents gcc -O2 from inlining txr_main into main.
+	We need separate stack frames for main and txr_main,
+	in order to be sure that when walking to the bottom of
+	stack pointer, we visit all locals in main. This is the
+	whole reason why there is a separate txr_main.
+
+2009-12-02  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (tests): Don't depend on the executable. Otherwise,
+	during make install-tests, if it doesn't exist in the
+	install directory, a gcc compile command gets deposited
+	into the run.sh generated script.
+	(install-tests): Fixes to make this work when using
+	a separate build directory. Split the cpio -p job
+	into a cpio -i piping into cpio -o.
+
+2009-12-02  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (install-tests): New target. Provides a way to make the
+	test cases part of the installation, and a generated script to run the
+	commands on the installation host.
+
+2009-12-02  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fix annoyances with dependency generation, such as picking up local
+	files that are not in the project.
+
+	* Makefile (depend): Rule passes object file names as arguments
+	to depend.txr script.
+
+	* depend.txr: Changed to take names of object files from command line,
+	rather than scanning the directory for all .c files. Switched
+	to new style next directives, using quasiliterals.
+
+	* dep.mk: Regenerated.
+
+2009-11-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (CFLAGS): If the compiler matches the pattern %g++,
+	then remove some C-front-end-specific warnings from CFLAGS,
+	which the g++ front end will complain about.
+
+2009-11-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (CFLAGS): add -Dlint to CFLAGS when compiling y.tab.o.
+	This suppresses some warnings from a byacc-generated parser,
+	and gets rid of a useless static sccsid array. May help with
+	Bison-generated parser also.
+
+2009-11-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.l: Use flex options to suppress generation of the
+	unused functons yyunput and yyinput, thus getting rid of
+	some compiler diagnostics.
+
+2009-11-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Code cleanup. All private functions static. Private stuff
+	in regex module not exposed in header. Etc.
+
+	* configure (diag_flags): Add -Wmissing-prototypes and
+	-Wstrict-prototypes.
+
+	* gc.c (more): Turn into prototyped definition with (void).
+
+	* gc.h (unmark): Declared.
+
+	* hash.c (hash_equal, hash_destroy, hash_mark, hash_grow): Private
+	functions defined static.
+
+	* lib.c (flatten_helper, do_bind2, do_bind2other): Likewise.
+
+	* lib.h (make_package, merge, d): Declared.
+
+	* match.c (dump_shell_string, dump_byte_string, dump_var,
+	dump_bindings, depth, weird_merge, bindable, dest_bind, match_line,
+	format_field, subst_vars, eval_form, complex_open, complex_snarf,
+	complex_stream, robust_length, bind_car, bind_cdr, extract_vars,
+	extract_bindings, do_output_line, do_output, match_files): Private
+	functions defined static.
+	(map_leaf_lists, complex_close): Unused functions removed.
+	
+	* parser.h (yyerror): Declared.
+
+	* regex.c (bitcell_t, BITCELL_ALL1, CHAR_SET_SIZE,
+	chset_type_t, cset_L0_t, cset_L1_t, cset_L2_t, cset_L3_t,
+	struct any_char_set, struct small_char_set, struct displaced_char_set,
+	struct large_char_set, struct xlarge_char_set, union char_set,
+	nfa_kind_t, struct nfa_state_accept, struct nfa_state_empty,
+	struct nfa_state_single, struct nfa_state_set, struct nfa_state,
+	struct nfa_machine): Definitions moved here from regex.h file.
+	(L0_fill_range, L0_contains, L1_full, L1_fill_range, L1_contains,
+	L1_free, L2_full, L2_fill_range, L2_contains, L2_free, L3_fill_range,
+	L3_contains, L3_free, char_set_create, char_set_destroy,
+	char_set_compl, char_set_add, char_set_add_range, char_set_contains,
+	nfa_state_accept, nfa_state_empty, nfa_state_single, nfa_state_wild,
+	nfa_state_free, nfa_state_shallow_free, nfa_state_set,
+	nfa_state_empty_convert, nfa_state_merge, nfa_make, nfa_combine,
+	nfa_compile_set, nfa_all-states, nfa_closure, nfa_move): Private
+	functions defined static.
+
+	* regex.h (bitcell_t, BITCELL_ALL1, CHAR_SET_SIZE,
+	chset_type_t, cset_L0_t, cset_L1_t, cset_L2_t, cset_L3_t,
+	struct any_char_set, struct small_char_set, struct displaced_char_set,
+	struct large_char_set, struct xlarge_char_set, union char_set,
+	nfa_kind_t, struct nfa_state_accept, struct nfa_state_empty,
+	struct nfa_state_single, struct nfa_state_set, struct nfa_state,
+	struct nfa_machine): Definitions removed.
+	(char_set_created, char_set_destroy, char_set_compl, char_set_add,
+	char_set_add_range, char_set_contains nfa_state_accept,
+	nfa_state_empty, nfa_state_single, nfa_state_wild, nfa_state_set,
+	nfa_state_free, nfa_state_shallow_free, nfa_state_merge): Extern
+	declarations removed.
+
+	* stream.c (stdio_stream_print, stdio_stream_destroy,
+	stdio_stream_mark, stdio_get_char, stdio_get_byte,
+	string_in_stream_mark, vformat_str): Private functions defined static.
+
+	* txr.c (oom_realloc_handler, help, hint,
+	remove_hash_bang_line): Likewise.
+
+	* unwind.c (uw_unwind_to_exit_point): Likewise.
+
+2009-11-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* configure: Workaround in banner code for coreutils printf %.*s bug.
+
+2009-11-27  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Switching to DESTDIR convention for install.
+	Make install step does some things more correctly now,
+	without relying on the install program.
+
+	* configure: Help text doesn't refer to ``Makefile variables''
+	but ``make variables'', or ``variables in config.make''.
+	The install_prefix variable becomes DESTDIR now in
+	config.make.
+
+	* Make (INSTALL): New rule body macro. 
+	(install): Uses of mkdir -p and cp switched to a call
+	to the INSTALL macro.
+
+2009-11-26  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 026.
+
+	Fixed wchar_t build problem in parser.y.
+
+	Improved configure script to auto-detect yacc program.
+	Txr works with either Berkeley yacc (byacc) or Bison.
+
+	Fixed some two uninitialized memory bugs.
+
+	Valgrind API is now used to integrate GC memory manager
+	with valgrind.
+
+	The symbols nothrow and args in the next directive
+	are now keyword symbols, written :nothrow and
+	:args.  (Breaks backward compatibility; sorry!)
+
+	* txr.c (version): Bumped to 026.
+
+	* txr.1: Bumped version to 026.
+
+	* configure: Bumped txr_ver to 026.
+
+2009-11-26  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Not all systems have a yacc alias for the yacc program. 
+	txr is known to work with two yacc implementations: GNU Bison
+	and Berkeley yacc. Let's add some auto-detection for yacc.
+
+	* Makefile: use "include" rather than "-include" for
+	including config.make, so that make fails if the file does
+	not exist.
+	(conftest.yacc): New target. Just outputs the value of the
+	variable expansion of $(YACC).
+
+	* configure (yaccname): New variable.
+	(gen_config_make): New function.
+	Steps added to test for existence of various yaccs.
+
+2009-11-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* gc.c (mark_mem_region): Bugfix: do not mess with the valgrind
+	accessibility of the heap object if valgrind debugging is not enabled.
+
+2009-11-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.y (grammar): Fixes for bison 2.4.1. Remove superfluous action
+	in chrlit.  Include <stdlib.h> for abort.
+
+2009-11-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Refinements to Valgrind support.
+
+	* gc.c (mark_mem_region): If a pointer from the stack is valid
+	for the heap, it may point to a free object, which is marked
+	in accessible. We must grant the garbage collector access
+	to the object. If the object is free, close off access.
+	This is not 100% correct, because if the object is accessible
+	but undefined, then we end up flipping it to defined.
+	(sweep): Before sweeping each heap, mark the entire block as defined.
+	This is necessary because sweep accesses blocks, which may be free,
+	and thus inaccessible. Then, during the sweep, any block
+	which is already free must be marked inaccessible again.
+	This means that the remaining blocks that are reachable become defined.
+	Here that is okay, because gc has marked all those blocks. If any
+	of them had uninitialized members, that would have been caught
+	by valgrind during the marking phase, if not sooner.
+
+2009-11-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	More Valgrind support. New option --vg-debug which turns on
+	Valgrind protection of free blocks. This works independently
+	of --gc-debug.
+
+	* gc.c (opt_vg_debug): New conditionally defined global variable.
+	(more): Mark entire heap of free blocks inaccessible, if
+	vg debugging is enabled.
+	(make_obj): If vg debugging enabled, mark returned block as accessible,
+	but undefined, and take care to grant self temporary access while
+	manipulating the free list.
+	(finalize): Removed old debugging logic of not freeing strings
+	and vectors during gc debug. If the null pointers are ever a problem
+	during debugging, they can be checked inside obj_print, and
+	turned into #<garbage ...> notation.
+	(sweep): Switch to FIFO free block recycling if vg debugging is
+	enabled, just like when gc debugging is enabled.
+	Mark freed blocks as inaccessible, careful to grant self
+	temporary access while manipulating the free list.
+
+	* txr.c (txr_main): Parse the --vg-debug option.
+
+	* txr.h (opt_vg_debug): Conditionally declared.
+
+2009-11-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fix a build breakage that may happen on some platforms.
+	The parser.y file includes "utf8.h", which uses the the type wint_t.
+	It also includes "lib.h" which uses "wchar_t". But it fails
+	to include any headers which define these types.
+	The generated y.tab.c picks up wchar_t by the Bison-inserted
+	inclusion of <stdlib.h>, so that's how we got that. But wint_t does not
+	come from any of the headers---if they are standard-conforming.
+
+	* parser.y: Add inclusion of <stddef.h> and <wchar.h>.
+
+2009-11-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	More valgrind integration. Vector objects keep displaced pointers
+	to vector data; they point to element 0 which is actually the third
+	element of the vector. If an object is only referenced by interior
+	pointers, Valgrind reports it as possibly leaked. This change
+	conditionally adds a pointer to the true start of the vector,
+	if Valgrind support is enabled.
+
+	* lib.h (struct vec): vec_true_start, new member.
+
+	* lib.c (vector, vec_set_fill):  Maintain vec_true_start.
+
+2009-11-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	First stab at Valgrind integration. First goal: eliminate false
+	positives when gc is accessing uninitialized parts of the stack.
+
+	* configure (valgrind): New variable. Defaults to false (do not
+	build valgrind support). New check for whether the valgrind API
+	is actually avilable if --valgrind is selected.
+	(HAVE_VALGRIND): Conditionally added to config.h.
+
+	* gc.c: Conditionally include valgrind memcheck.h header.
+	(mark_mem_region): After pulling out a value from the stack,
+	mark that copy as defined memory using VALGRIND_MAKE_MEM_DEFINED.
+	(mark): Removed check for a registered root variable pointer
+	being null; this cannot happen, unless someone registers a
+	null pointer, or the stack is trashed. The comment about a
+	possible null was misleading.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fix uninitialized memory locations.
+
+	* hash.c (make_hash): Uninitialized h->count member.
+
+	* lib.c (mkustring): Preallocated string buffer to have its
+	null terminator byte initialized, because the caller
+	does not do so (e.g. see lit_har_helper in parser.y).
+	The calling module is responsible for initializing all API-accessible
+	parts of the string, but the null belongs to the string implementation.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Switching to keyword symbols for :args and :nothrow.
+
+	* lib.c (args_s, nothrow_s): Renamed to args_k and nothrow_k.
+	(flattn_s): Renamed to flatten_s.
+	(obj_init): args_k and nothrow_k interned in keyword package.
+
+	* lib.h (args_s, nothrow_s, flattn_s): Declarations updated.
+
+	* match.c (match_files): Follow name changes.
+
+	* tests/004/query1.txr: Changed nothrow to :nothrow.
+
+	* txr.1: Documentation updated.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	/Now/ this can be released as 025.
+
+	utf8.c (utf8_from_uc): Fix bug introduced several commits ago (porting
+	to C++). Caught by regression test suite. Found using git bisect.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 025
+
+	External changes:
+
+	Flattening an empty list produces an empty list, not (()),
+	which is a list containing an empty list.
+
+	Tightened up semantics of bind, merge and other forms.
+	Fixed false positives in binding.
+
+	More bugfixes in the parser leading to garbage error messages.
+	(Still no regression test cases for error cases, oops).
+
+	Fixed crash in regexp function.
+
+	Symbol packages added. Keyword symbols (symbols in keyword package)
+	introduced.
+
+	Clarified semantics that t, nil and keywords evaluate to themselves.
+
+	Fixed bugs in the system for building in a separate directory.
+
+	Configuration script now tests the compiler for sanity, and runs
+	compiler-based tests to detects which integer type to use for casting
+	an obj_t * value to a number, and what specifiers to use for
+	inline functions.
+
+	Internal changes:
+	
+	Macros replaced with inline functions.
+
+	Uses of obj_t * replaced with val typedef everywhere.
+
+	Exceptions occuring during early initialization no longer
+	lead to an infinite recursion due to streams not working.
+
+	The long type is no longer used, but a configured typedef.
+
+	Configure script now spits out a "config.h" header that is
+	widely included.
+
+	Symbol globals renamed to _s naming scheme.
+
+	Code made portable to C++. A new configure flag --ccname make it easier
+	to switch compilers.
+
+	* txr.c (version): Bumped to 025.
+
+	* txr.1: Bumped version to 025.
+
+	* configure: Bumped txr_ver to 025.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Auto-detect what specifiers to use for inline functions.
+	Allow compiler command to be set independently of full path
+	for easier compiler switching.
+
+	* Makefile (conftest.o): Target removed. What this rule does
+	is already an implicit rule; and nowhere else in the Makefile
+	are there rules for .c -> .o.
+	(conftest2): New target, for two-translation-unit config test program.
+	(INLINE_FLAGS): Removed.
+
+	* configure (ccname, inline): New variables.
+	(inline_flags): Variable removed. INLINE_FLAGS not generated
+	any more in config.make.  Added test for what inline specifiers to use,
+	which is turned into #define INLINE ... in the config.h header.
+
+	* lib.h: (tag, is_ptr, is_num, is_chr, is_lit, type, auto_str,
+	static_str, litptr): Changed from inline to INLINE.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Changes to make the code portable to C++ compilers, which
+	can be taken advantage of for better diagnostics.
+
+	* gc.c (more, mark_obj, sweep, unmark): Obey stricter C++ rules
+	with regard to enumerations. 
+	(make_obj): Avoid using C++ keyword "try".
+
+	* lib.c: Removed duplicate definitions of objects, found by C++.
+	(chk_malloc, chk_realloc): Casts needed when converting from void *.
+	(list): Discovered and fixed lack of va_end.
+	(trim_str, acons_new_l): Avoid use of C++ keyword "new".
+	(make_sym): Follow rename of struct member.
+
+	* lib.h (struct sym): Renamed val member to value.
+	(null): Added missing declaration.
+
+	* match.c (enum fpip_close, struct fpip): Moved and named enum out of
+	struct.
+
+	* regex.c (L0_full): Cast added in signed/unsigned comparison.
+	(L1_fill_range, L2_fill_range, L3_fill_range, char_set_create):
+	Don't mark static blank structures const; then they need initializers
+	in C++.
+	(char_set_compl, char-set_destroy, char_set_contains, nfa_compile_set):
+	Avoid using the C++ keyword "compl".
+
+	* regex.h (struct any_char_set, struct small_char_set, struct
+	displaced_char_set, struct large_char_set, struct xlarge_char_set):
+	Renamed compl member to comp.
+
+	* utf8.c (utf8_from_uc, ut8_decode): Obey stricter C++ rules
+	with regard to enumerations.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fixed broken yyerrorf. It was still taking char *, and passing
+	that as an object to vformat, resulting in #<garbage: ...>
+	output.
+
+	* parser.h (yybadtoken): Declaration updated.
+
+	* parser.l (yybadtoken): Redefined to take val argument.
+	The tok stays as int; this is closely coupled to yacc,
+	so why bother with num().
+
+	* parser.y (grammar): Fix occurences of yybadtoken to pass
+	proper literal objects using the lit macro, or nil in
+	the one case when there is no context.
+
+2009-11-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Renaming global variables that denote symbols, such that they
+	have a _s suffix.
+
+	* lib.c (cons_t, str_t, chr_t, num_t, sym_t, pkg_t, fun_t, vec_t,
+	stream_t, hash_t, lcons_t, lstr_t, cobj_t var, regex, set, cset, wild,
+	oneplus zeroplus, optional, compound, or, quasi skip, trailer, block,
+	next, freeform, fail, accept all, some, none, maybe, cases, collect,
+	until, coll define, output, single, frst, lst, empty, repeat, rep
+	flattn, forget, local, mrge, bind, cat, args try, catch, finally,
+	nothrow, throw, defex error, type_error, internal_err, numeric_err,
+	range_err query_error, file_error, process_error): Symbol globals
+	renamed to cons_s, str_s, chr_s, num_s, sym_s, pkg_s, fun_s, vec_s, t,
+	cons_s, str_s, chr_s, num_s, sym_s, pkg_s, fun_s, vec_s, stream_s,
+	hash_s, lcons_s, lstr_s, cobj_s, var_s, regex_s, set_s, cset_s, wild_s,
+	oneplus_s, zeroplus_s, optional_s, compound_s, or_s, quasi_s, skip_s,
+	trailer_s, block_s, next_s, freeform_s, fail_s, accept_s, all_s,
+	some_s, none_s, maybe_s, cases_s, collect_s, until_s, coll_s, define_s,
+	output_s, single_s, first_s, last_s, empty_s, repeat_s, rep_s,
+	flattn_s, forget_s, local_s, merge_s, bind_s, cat_s, args_s, try_s,
+	catch_s, finally_s, nothrow_s, throw_s, defex_s, error_s, type_error_s,
+	internal_error_s, numeric_error_s, range_error_s, query_error_s,
+	file_error_s, process_error_s,
+	(code2type, typeof, make_package, intern, obj_init): Symbols
+	references follow rename.
+
+	* lib.h (cons_t, str_t, chr_t, num_t, sym_t, pkg_t, fun_t, vec_t,
+	stream_t, hash_t, lcons_t, lstr_t, cobj_t var, regex, set, cset, wild,
+	oneplus zeroplus, optional, compound, or, quasi skip, trailer, block,
+	next, freeform, fail, accept all, some, none, maybe, cases, collect,
+	until, coll define, output, single, frst, lst, empty, repeat, rep
+	flattn, forget, local, mrge, bind, cat, args try, catch, finally,
+	nothrow, throw, defex error, type_error, internal_err, numeric_err,
+	range_err query_error, file_error, process_error): Declarations
+	updated.
+
+	* hash.c (make_hash): Symbol references follow rename.
+
+	* match.c (sem_error, file_err, dump_var, match_line, subst_vars,
+	eval_form, complex_stream, extract_vars, do_output_line, do_output,
+	match_files): Likewise.
+
+	* parser.y (grammar, repeat_rep_helper, define_transform): Likewise.
+
+	* regex.c (nfa_compile_set, nf_compile_regex, regex_compile,
+	regexp, regex_nfa): Likewise.
+
+	* stream.c (stdio_maybe_read_error, stdio_maybe_write_error,
+	stdio_close, pipe_close, make_stdio_stream, make_pipe_stream,
+	make_string_input_stream, make_string_byte_input_stream,
+	make_string_output_stream, get_string_from_stream, make_dir_stream,
+	close_stream, get_line, get_char, get_byte, vformat, format,
+	put_string, put_char): Likewise.
+
+	* txr.c (txr_main): Likewise.
+
+	* unwind.c (uw_throw,  uw_errorf, type_mismatch, uw_register_subtype,
+	uw_init): Likewise.
+
+	* unwind.h (internal_error, numeric_assert, range_bug_unless);
+	Likewise.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* configure (platform_flags, remove_flags): New config variables.
+
+	* Makefile (CFLAGS): Take into account new flags.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Follow up on 64 bit compilation warnings.
+
+	* lib.c (chr, chrp): Do not convert directly between wchar_t and
+	the pointer type; go through cnum intermediate value.
+
+	* stream.c (vformat): Fix bad cast from pointer to int; this was
+	missed in the conversion to cnum because it should have been a
+	cast to long originally.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (conftest.o): revert change that took CFLAGS from
+	this target.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* configure: Don't rely on higher precision arithmetic from the build
+	machine's shell. POSIX requires shell arithmetic to be only signed
+	long. We can't compute the INT_PTR_MAX constant in the shell, but
+	rather generate a constant C expression to compute it.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Reporting of compile errors during configuration for easier
+	configure debugging.
+
+	* Makefile (conftest): Pass all of the CFLAGS when building
+	conftest. This way bad compiler options are caught
+	right in the basic compiler sanity test.
+
+	* configure: Compiler jobs are redirected to temporary error
+	file conftest.err which is dumped if there is a failure.
+	Parting text is improved: the user should not blindly
+	trust the success of the configuration but check its sanity.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* configure: Bugfix in parsing configuration variables
+	which contain the = character.
+
+	* Makefile (conftest.o): Pass full CFLAGS to configuration test
+	builds. If some flags don't work with the compiler, this should
+	be caught.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (CFLAGS): Added -I. so current directory is first
+	in the include search path. This is needed for finding
+	generated header files, when building in a separate directory.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (chk_malloc, chk_realloc): Fix diagnosable conversion,
+	caught by gcc 4.1.1.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* configure (cross): Print out value of $cross in --help.
+
+	* depend.txr: Add "config.h" to list of headers that are not
+	prefixed with $(top_srcdir).
+
+	* dep.mk: Regenerated.
+
+2009-11-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Improving portability. It is no longer assumed that pointers
+	can be converted to a type long and vice versa. The configure
+	script tries to detect the appropriate type to use. Also,
+	some run-time checking is performed in the streams module
+	to detect which conversions specifier strings to use for
+	printing numbers.
+
+	* Makefile (conftest, conftest.o, conftest.syms): New targets.
+	Used by the configure script. 
+
+	* configure (intptr, nm): New configuration variables.
+	Generating config.make is no longer the last step; compiler tests are
+	performed after config.make is set up, so that rules in the Makefile
+	can be used for doing the compiling. (This is the cleanest way to do
+	it, since the paths to the tools may contain Make variable expansion
+	syntax).  New steps are added to try to detect whether the compiler has
+	a wider integer type than the c89 long, and which of the available
+	types (including, potentially, the extra wide type) is suitable for
+	holding a pointer. Results are generated into a header config.h.
+
+	* dep.mk: Regenerated.
+
+	* lib.h (NUM_MAX, NUM_MIN): Now derived from INT_PTR_MAX and
+	INT_PTR_MIN macros, which come from config.h.
+	(cnum): New typedef name.
+	(cobj ops, tag, auto_str, static_str, litptr, lit_noex):
+	Changed long to cnum.
+	(num, c_num): Declaration updated.
+
+	* lib.c (equal, length, num, c_num, plus, minus, neg, search_str,
+	cat_str, vector, vec_set_fill, obj_print, obj_pprint): Changed
+	long to cnum.
+
+	* gc.c (mark_obj): Changed long to cnum.
+
+	* hash.c (stuct hash, ll_hash, hash_mark, hash_grow,
+	hash_process_weak): Changed long to cnum.
+
+	* match.c (complex_open, do_output_line, do_output, match_files):
+	Changed long to cnum.
+
+	* parser.h (lineno): Declaration updated.
+
+	* parser.l (lineno): Redefined as cnum.
+	(grammar): Changed long to cnum.
+
+	* parser.y (%union/yystype): num member changed to cnum.
+	of config.h added.
+
+	* regex.c (nfa_run, nfa_machine_match_span, search_regex):
+	Changed long to cnum.
+
+	* regex.h (struct nfa_machine): Members last_accept_pos and count
+	changed to cnum.
+	(nfa_run, nfa_machine_match_span): Declarations updated.
+
+	* stream.c (struct fmt): New type.
+	(fmt_tab): New static array.
+	(num_fmt): New static pointer.
+	(detect_format_string): New function.
+	(vformat): Changed long to cnum. Formatting of numbers uses
+	num_fmt.
+	(stream_init): Call detect_format_string.
+
+	* txr.c, unwind.c, utf8.c: include config.h.
+
+	* unwind.h (internal_error): Local declaration of num updated.
+
+2009-11-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Introducing symbol packages. Internal symbols are now in
+	a system package instead of being hacked with the $ prefix.
+	Keyword symbols are provided. In the matcher, evaluation
+	is tightened up. Keywords, nil and t are not bindeable, and
+	errors are thrown if attempts are made to bind them.
+	Destructuring in dest_bind is strict in the number of items.
+	String streams are exploited to print bindings to objects
+	that are not strings or characters. Numerous bugfixes.
+
+	* lib.h (enum type, type_t): new member: PKG.
+	(struct stym): New member: package.
+	(struct package): New type.
+	(union obj, obj_t): New member pk.
+	(interned_syms): Declaration removed.
+	(keyword_package, pkg_t): Declared.
+	(intern, acons_new_l): Declarations updated.
+	(find_package, symbol_package, keywordp): Declared.
+
+	* lib.c (interned_syms): Definition removed.
+	(packages, pkg_t, system_package, keyword_package, user_package): New
+	global variables.
+	(code2type, equal, obj_pprint): Handle PKG case.
+	(symbol_package, make_package, find_package, keywordp): New functions.
+	(make_sym): Initialize package field of symbol.
+	(intern): Takes package argument. Rewritten using packages,
+	which use hash tables to store symbols.
+	(acons_new_l): Takes extra pointer argument to return an extra
+	value.
+	(obj_init): Updated to handle packages. The orders of some
+	initializations have to change. The way nil is added as a symbol is
+	quite different, and a special hack for the symbol t is used.
+	Most symbols go into the user_package, but symbols that were
+	previously namespaced with $ go to the system package.
+	(obj_print): SYM cases now considers the packge of a symbol.
+	Symbols in the user package are printed as before.
+	Symbols with no package are printed using #: notation;
+	keywords with : notation; and all others with their package prefix.
+	PKG case is handled.
+
+	* gc.c (finalize): Handle PKG case.
+	(mark_obj): For SYM, mark the new package member. Handle PKG case.
+
+	* hash.h (gethash_l): Declaration updated.
+
+	* hash.c (ll_hash): Handle PKG case.
+	(gethash_l): Extra argument added to distinguish new addition
+	from existing find.
+
+	* match.c (dump_var): Dumps any object now by printing to
+	a string with a string stream.
+	(bindable): New function.
+	(dest_bind): Tightened up to distinguish bindable symbols
+	from non-bindable. Symbols that stand for themselves, including nil,
+	can only match themselves. Destructuring matches have to
+	match in the number of elements: dot notation can be used
+	to match superfluous elements.
+	(eval_form): Tightened up to recognize bindable symbols.
+	(match_files): Various directives honor non-bindable symbols (cat,
+	merge, flatten).
+
+	* parser.l (yybadtoken): Handle KEYWORD case.
+	(grammar): TOK can start with : . Returned as KEYWORD terminal,
+	with a lexeme that no longer has the : character.
+
+	* parser.y (KEYWORD): New nonterminal.
+	(grammar): Calls to intern given extra parameter.
+	In the expr rule, KEYWORD turned into symbol in keyword package.
+
+	* regex.c (regexp): Bugfix: dereferencing non pointer.
+
+	* stream.c (vformat): Bugfixes in state machine: handling
+	of prefix digits; printing of numbers in ~s. 
+
+	* txr.c (txr_main): Intern calls updated.
+
+	* txr.1: Updated with information about nil, t and keywords.
+	More details about destructuring matching in bind.
+
+2009-11-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* unwind.c (uw_throw): If streams are not initialized,
+	we have an unhandled exception too early in initialization.
+	Use C stream to print an error message and abort.
+	Using the nil stream variable will just cause a recursion bomb.
+
+2009-11-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (intern): Symbol interning to hash tables.
+	(obj_init): interned_syms must be created as a hash
+	table. Rearranged the order of some initializations so
+	the vector code called by hash works.
+
+2009-11-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (dest_bind): Fix breakage from two commits ago;
+	was falling through to unsuccessful return in the
+	consp case.
+
+2009-11-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.y (grammar): Fix error actions that do not assign
+	a value to $$.
+
+2009-11-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (dest_bind): Extended to handle more general forms
+	by using eval_form rather than direct symbol binding lookups.
+	False positive return fixed.
+	(match_line): Fixed merge to use eval_from
+	rather than direct symbol binding.
+
+2009-11-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (flatten): Semantics change. The flatten function
+	should not map nil -> (nil), but nil -> nil.
+
+2009-11-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Changing ``obj_t *'' occurences to a ``val'' typedef. (Ideally,
+	we wouldn't have to declare object variables at all, so why
+	use an obtuse syntax to do so?)
+
+	* lib.h (val): New typedef name. Used throughout.
+
+	* gc.c, gc.h, hash.c, hash.h, lib.c, match.c, match.h, parser.h,
+	parser.l, parser.y, regex.c, regex.h stream.c,, stream.h, txr.c,
+	unwind.c, unwind.h: Replace obj_t * with val almost everywhere.
+	Low-level gc functinos that work with arrays of obj_t use
+	obj_t *. Seeing pointer arithmetic on a val doesn't make sense.
+	In macros we use obj_t *, to reduce the chances of clashing
+	with some local variable called val.
+
+2009-11-19  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Fixed mangled formatting of exception handling example.
+
+2009-11-19  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Get rid of macros in favor of safer inline functions. 
+
+	The recent auto_str("byte str") error could have been caught
+	at compile time.
+
+	* Makefile (CFLAGS): Include expansion of INLINE_FLAGS.
+
+	* configure (inline_flags): New variable.
+	(INLINE_FLAGS): New variable generated in config.make.
+
+	* lib.h (tag, is_ptr, is_num, is_chr, is_lit, type,
+	auto_str, static_str, litptr): Function-like macros converted to
+	functions.
+
+2009-11-19  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 024
+
+	Fixed show-stopper breakage in parse error diagnostic function.
+
+	Fixed bug introduced back in 015: collects that don't yield
+	any variable bindings being wrongly treated as failed.
+
+	* txr.c (version): Bumped to 024.
+
+	* txr.1: Bumped version to 024.
+
+2009-11-19  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Use unsigned char * as allocator return value.
+
+	* lib.c (chk_malloc, chk_realloc): Return unsigned char *.
+
+	* lib.c (chk_malloc, chk_realloc): Declarations updated.
+
+	* utf8 (utf8_dup_to_uc): Remove cast to unsigned char *.
+
+2009-11-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Following-up on diagnostics obtained by running code through C++
+	compiler. Idea: allocator functions return char * instead of void *,
+	like malloc did in classic pre-ANSI C. That way we are forced to 
+	use a cast except when the target pointer is char * already.
+
+	* lib.c (progname): Duplicate definition of global removed.
+	(equal): Some default: cases to switch statements added.
+	(chk_malloc): Returns char *.
+	(chk_realloc): Returns char *, but takes void * on the way in.
+	That way we get C++-like behavior.
+	(chk_strdup): Oops, this returned void * instead of wchar_t *.
+	c++ catches boo boo.
+	(stringp): Added default: case to switch.
+	(vec_set_fill): Cast return value of chk_realloc.
+
+	* lib.h (chk_malloc, chk_realloc, chk_strdup): Declarations updated.
+
+	* parser.h (lineno): extern qualifier added to prevent duplicate
+	definitions of.
+
+	* regex.c (nfa_free, nfa_run, nfa_machine_init, regex_compile): Cast
+	return value of chk_malloc.
+
+	* stream.c (snarf_line, get_string_from_stream): Cast return value of
+	chk_realloc.
+
+2009-11-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_line, match_files): Fix broken behavior of collect
+	that doesn't match anything. It is not a failed match, as the
+	documentation makes perfectly clear.  Collect/coll were introduced
+	in txr-006 and had the proper non-failing semantics.
+	However, in txr-015, during code restructuring, a bug crept in.
+	When changing to a different debugiging function, for some reason
+	I added the nil returns.
+
+2009-11-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.l (yyerror): Total breakage: can't take auto_str of char *
+	string. 
+	(yyerrorf): Total breakage: arguments of wrong types. Detected
+	by vformat as garbage.
+
+2009-11-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	txr.1: Clarified handling of UTF-8, now that it's precise and portable.
+
+2009-11-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 023
+
+	Minor bugfix.
+
+	Code cleanup. Portability.
+
+	Completely removed dependency on C99 wide character stream functions,
+	and character encoding support from glibc. All UTF-8 encoding
+	and decoding is done by the program itself.
+
+	Removed the use of all GNU extensions and C99 syntax.
+
+	txr now requires a C90 compiler, and POSIX 1003.1 and 1003.2.
+
+	* txr.c (version): Bumped to 023.
+
+	* txr.1: Bumped version to 023.
+
+2009-11-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	More removal of C99 wide character I/O, and tightening up
+	of standard conformance.
+
+	* configure (lang_flags): Specify -D_POSIX_C_SOURCE=2 to obtain
+	POSIX 1003.1 and POSIX 1003.2 functions from the headers,
+	without GNU extensions. Specify -std=c89 to get C89 conformance
+	from gcc. 
+
+	* match.c (dump_byte_string): New function.
+	(dump_shell_string): Retargetted to object streams.
+	(dump_var, dump_bindings): Retargetted to object streams.
+	Changed back to using a byte string for the array index prefixes,
+	to avoid using the wide-character swprintf.
+
+	* parser.l (grammar): Eliminate wcsdup uses in favor of chk_strdup.
+	Not only is wcsdup a GNU extension, it doesn't have the OOM check.
+
+	* stream.c: Added <sys/wait.h> header to define WIFEXITED and others.
+
+	* txr.c: Added include of <stdarg.h>. Removed <locale.h>,
+	(main): Removed setlocale call. Not needed any more, since wide
+	stream and string I/O is no longer used from the C library.
+
+2009-11-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Removing use of C99 wide character I/O.
+
+	* stream.c (BROKEN_POPEN_GETWC): Macro removed. Work around no
+	longer needed since the program does not call getwc.
+	(struct stdio_handle): #ifdef text removed.
+	New member added: utf8 decoder.
+	(stdio_maybe_read_error, stdio_maybe_write_error): Treat
+	null handle as an exception rather than nil return. No need
+	to check ferror in stdio_maybe_write_error, since there is no
+	need to distinguish an end-of-file situation from error.
+	(stdio_put_char_callback, stdio_get_char_callback): New functions.
+	(stdio_put_string, stdio_put_char): Retargetted to utf8 encoder.
+	Null handle treated as separate kind of error.
+	(snarf_line, stdio_get_line, stdio_get_char): Retargetted to utf8
+	decoder.
+	(pipe_close): #ifdef text removed.
+	(make_stdio_stream): utf8 decode initialized.
+	(make_pipe_stream): utf8 decoder initialized. #ifdef text removed.
+
+2009-11-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Warning fixes.
+
+	* hash.c (hash_ops): Add missing initializer.
+
+	* match.c (complex_open): Add missing intializer to ret variable.
+
+	* regex.c (regex_obj_ops): Add missing initializer.
+
+	* stream.c (stdio_ops, pipe_ops, string_in_ops, byte_in_ops,
+	string_out_ops, dir_ops): Likewise.
+
+2009-11-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (chrp): Fix broken is_chr(num) call.
+
+2009-11-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* regex.c (nfa_all_states, nfa_closure): visited parameter
+	should be unsigned.
+
+2009-11-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fixes for compliance to C89.
+
+	* lib.c (init): Do not define variable after statements.
+
+	* match.c (match_files): Likewise.
+
+	* regex.h (struct any_char_set, struct small_char_set, struct
+	displaced_char_set, struct large_char_set,
+	struct xlarge_char_set): do not use enum bitfields, which is a GCC
+	extension.
+
+	* unwind.h (enum uw_frtype, uw_frtype_t): Combine into one
+	declartion, eliminating forward enum reference which is a GCC
+	extension.
+	(uw_block_begin): Add dummy typedef to macro so that it requires
+	a following semicolon. Without this, if the macro use is followed
+	by a semicolon, that semicolon looks like a null statement. A
+	subsequent declaration thus follows a statement and is not conforming
+	to C89. Also added an opening do.
+	(uw_block_end): Add while(0) to match do in uw_block_begin.
+	(uw_env_begin, uw_env_end): Add do/while(0) to macro pair, so
+	uw_env_end reuqires a semicolon.
+	(uw_catch_begin, uw_catch_end): Likewise.
+
+2009-11-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 022
+
+	Fix for bug 28033: crash in string output stream.
+	(Used by exception handling).
+
+	New kernel object type introduced which allows C string literals
+	to be used as first-class objects.
+
+	Use of printf-like C formatting eliminated from the code base.
+
+	The dependency on C99 wide character I/O is now minimized.
+
+	* txr.c (version): Bumped to 022.
+
+	* txr.1: Bumped version to 022.
+
+2009-11-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (rebuild): New target. Tired of doing make clean; make.
+
+2009-11-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Big round of changes to switch the code base to use the stream
+	abstraction instead of directly using C standard I/O,
+	to eliminate most uses of C formatted I/O,
+	and fix numerous bugs, such variadic argument lists which
+	lack a terminating ``nao'' sentinel. 
+	
+	Bug 28033 is addressed by this patch, since streams no longer provide
+	printf-compatible formatting. The native formatter is extended with
+	some additional capabilities to take over.
+
+	The work on literal objects is expanded and they are now used
+	throughout the code base.
+
+	Fixed bad realloc in string output stream: reallocating by number
+	of wide chars rather than bytes.
+
+	* gc.c (sweep): Debugging code switched from fprintf to format.
+
+	* lib.c (typ_check, type_check2, car, cdr, car_l, cdr_l, list,
+	num, chrp, apply, cobj_print_op, dump): Retargetted, with help of new
+	literals, to new funtions that take string objects, rather than raw C
+	strings.
+	(obj_print, obj_pprint): Revamped with support for LIT type.
+	Retargetted to not use C style I/O functions in streams.
+
+	* lib.h (lit): Macro retargetted to another macro so that it expands
+	its argument.
+	(lit_noex): New macro, like lit, but does not macro-expand argument.
+	(auto_str): New macro.
+	(static_str): New macro.
+
+	* match.c (debugf, debuglf, sem_error, file_err): Converted from C
+	string to string object.
+	(dest_bind, match_line, LOG_MISMATCH, LOG_MATCH, match_files):
+	Retargetted to new interfaces that take string objects rather than raw
+	C strings.
+	(complex_stream): New function.
+	(do_output_line, do_output, extract): Retargetted from C streams to
+	object streams.	
+
+	* parser.h (yyerrorf): Declaration updated.
+
+	* parser.l (yyerror): Call new yyerrorf interface, using auto_str
+	macro to dress up C string as a temporary object.
+	(yyerrorf): Changed from C strings to object strings.	
+	(yybadtoken, grammar): Retargetted to new yyerrorf.
+
+	* stream.c (strm_ops): put_string and put_char function pointers
+	changed to take object strings rather than C strings.  vcformat and
+	vformat virtuals removed. C formatting is not supported, and vformat is
+	handled above the stream switch level in one place for all streams.
+	(common_vformat, stdio_vcformat, string_out_vcformat, cformat,
+	put_cstring, put_cchar): Functions removed.	
+	(stdio_stream_print, stdio_stream_destroy, stdio_maybe_write_error,
+	stdio_put_string, stdio_put_char, stdio_close, pipe_close,
+	string_out_put_char, make_pipe_stream, make_string_input_stream,
+	make_string_output_stream, make_dir_stream, close_stream,
+	get_line, put_line, get_char, put_char, put_string): Retargetted to new
+	string object interfaces.
+	(stdio_ops, pipe_ops): stdio_vcformat and common_vcformat initializers
+	(string_out_ops): string_out_vcformat and common_vcformat initializers
+	removed.
+	(string_in_ops, byte_in_ops, dir_ops): Two null initializers removed.
+	(string_out_put_string): Converted to object string interface.
+	Unnecessary chk_realloc call suppressed.
+	(get_string_from_stream): Fixed bad call to realloc with incorrect
+	size.
+	(vformat_num, vformat_str): New functions, helper to vformat.
+	(vformat): Rewritten. Is now the formatting engine.
+	(format, put_string, put_char): Interface converted from C string to
+	object string.
+
+	* stream.h (vformat, format): Declarations updated.
+	(vcformat, cformat, put_cstring, put_cchar): Declarations removed.
+
+	* txr.c (oom_realloc_handler, help, txr_main): Retargetted to object
+	stream and strings.
+
+	* unwind.c (uw_throw, type_mismatch, uw_register_subtype): Retargetted
+	to new string object interfaces.
+	(uw_throwf, uw_errorf): Interface changed from C string to object
+	string.
+	(uw_throwcf, uw_errorcf): Functions removed.
+
+	* unwind.h (uw_throwf, uw_errorf, type_mismatch): Declarations updated.
+	(uw_throwcf, uw_errorcf): Declarations removed.
+	(internal_error): Macro interface changed and retargetted to
+	object strings. Also, num hygiene problem worked around with local
+	extern declaration.
+	(numeric_assert, range_bug_unless): Retargetted to object strings.
+
+	* utf8.c (utf8_to, utf8_dup_from_uc, utf8_dup_from,
+	utf8_dup_to_uc): Casts of chk_malloc return value added.
+
+2009-11-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Use the 11 tag bit pattern to denote a new type: LIT. This is a
+	pointer to a C static string, intended for literals. We can now
+	treat literal strings as light-weight objects.
+
+	* lib.h (TAG_MASK): Ensure the constant expr has long type.
+	(TAG_LIT): New macro.
+	(enum type, type_t): New enum member, LIT.
+
+	* gc.c (finalize, mark_obj): Handle LIT type.
+
+	* hash.c (ll_hash): Likewise.
+
+	* lib.c (code2type, equal, stringp, length_str, c_str,
+	obj_print): Likewise.
+	(obj_init): Intern symbols using literal strings.
+	(type): Parentheses added to macro expansion.
+	(is_lit, lit, litptr): New macros.
+
+2009-11-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (chr): Take wchar_t argument, not int. Dropped range check.
+	(c_chr): Return wchar_t not int.
+
+	* lib.h (chr, c_chr): Declarations updated.
+	
+2009-11-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 021.
+
+	Text is represented using wide characters now. Queries and data
+	are parsed as UTF-8, so extended characters can be directly used.
+	Numeric character escapes can go up to \x10FFF.  (More limited on
+	platforms where wchar_t is 16 bit).  Regular expressions support
+	extended characters, directly or through escapes. Regex character set
+	matches can use full Unicode range.  New test case 005 exercises
+	some of these features over Japanese text.
+
+	Failed exit status of pipes, and file close errors are exceptions now.
+
+	Bug fixed in regex character classes.
+
+	Fixed off-by-one error in lazy string implementation, which broke
+	some uses of the @(freeform) directive.
+
+	Fixed all instances of gc bug 28086: objects being prematurely
+	reclaimed.  This showed up when compiling for profiling (gcc -pg).
+
+	The --cc argument of the configure script works properly now.
+
+	Numbers and characters are unboxed types now, encoded directly in
+	the (obj_t *) value. Lowest two bits of (obj_t *) are a tag
+	distinguishing characters, integers and pointers.  The program
+	performs better from not having to cons memory when operating
+	on numbers and characters.
+
+	Discovered bug in glibc: getwc function segfaults when applied to
+	stream returned by popen. Worked around this bug. Bug is filed
+	as 10958 in glibc bugzilla.
+
+	Internals: 
+	
+	Hash tables implemented. Hash tables support weak keys and values.
+
+	* configure, hash.c, lib.c, stream.c, utf8.c: Removed trailing
+	from some lines.
+	
+	* txr.c (version): Bumped to 021. Removed trailing whitespace.
+
+	* txr.1: Bumped version to 021.
+
+2009-11-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Provide both char * and unsigned char * interfaces in UTF-8 module.
+	Fix unsigned and plan char * mixing.
+
+	* utf8.c (utf8_from_uc, utf8_to_uc, utf8_dup_from_uc,
+	utf8_dup_to_uc): New functions.
+	(utf8_from): Fix type of backtrack pointer to unsigned char *.
+
+	* utf8.h (utf8_from_uc, utf8_to_uc, utf8_dup_from_uc,
+	utf8_dup_to_uc): Declared.
+
+	* lib.c (string_utf8): Changed to take char * argument.
+	
+	* lib.h (string_utf8): Declaration updated.
+
+2009-11-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (depend): Marked phony and $(PROG) prerequisite dropped. 
+	(clean, distclean, tests, install): Phony targets marked phony.
+
+	* dep.mk: Regenerated.
+
+2009-11-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* configure (cc): Compute variable properly.
+
+2009-11-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fixes for bug 28086. When constructing a cobj, whose associated
+	C structure contains obj_t * references, we should initialize
+	that C structure after allocating the cobj. If we initialize
+	the structure first, it may end up having the /only/ references
+	to the objects. In that case, the objects are invisible to the
+	garbage collector. The subsquent allocation of the cobj itself
+	then may invoke gc which will turn these objects into dust.
+	The result is a cobj which contains a handle structure that
+	contains references to free objects. The fix is to allocate
+	the handle structure, then the cobj which is associated with
+	that handle, and then initialize the handle, at which point it
+	is okay if the handle has the only references to some objects.
+	Care must be taken not to let a cobj escape with a partially
+	initialized handle structure, and not to trigger gc between
+	allocating the cobj, and initializing the fields.
+
+	* hash.c (make_hash): Fix cobj construction order.
+
+	* stream.c (make_stdio_stream): Fix cobj construction order.
+	(make_pipe_stream): Fix cobj construction order. Also
+	noticed and fixed a bug: h->descr field not being initialized
+	in the currently enabled BROKEN_POPEN_GETWC variant of the code.
+
+2009-11-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New testcase which does some UTF-8 scanning, Unicode regexes,
+	and @(freeform).
+
+	* tests/005/data: New UTF-8 file.
+
+	* tests/005/query-1.txr: Likewise.
+
+	* tests/005/query-1.expected: Likewise.
+
+	* Makefile (TXR_ARGS): New target-specific assignment to set
+	data for test case set 005.
+
+2009-11-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (symbolp): Bugfix: function crashed on NUM argument.
+	(lazy_str): Fix for gc correctness: object from make_obj must be
+	completely intialized before any gc-triggering operation is invoked,
+	otherwise the garbage collector will be traversing an object
+	whose fields contain old garbage.
+	(lazy_str_force_upto): Off-by-one error. To force the object
+	up to index position N, means forcing up to length N+1.
+	This bug can make it look like a lazy string is much shorter
+	than it really is.
+
+2009-11-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Allow -c scripts to not have a trailing newline.
+	Test suite exercises -c now.
+
+	txr.c (txr_main): If the script specified with -c is not terminated
+	by a newline, just add a newline. On the shell command line, it's a
+	nuisance to have to add the extra line before closing the quote. 
+	It's also awkward in scripting, because the shell (or at
+	least Bash 3.0) does not produce a final terminating newline in command
+	substitution syntax like -c "$(cat file)". The last newline in
+	the file is trimmed, and has to be explicitly added in the script
+	itself, which is wrong in the case when the file is empty.
+
+	Makefile (TXR_SCRIPT_ON_CMDLINE): New target-specific variable,
+	arbitarily set for test 002.
+	(%.ok: %.txr): Rule updated to honor TXR_SCRIPT_ON_CMDLINE
+	variable, passing the script body to txr using -c rather than
+	as a file argument.
+
+	txr.1: Document -c change.
+
+2009-11-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Previous commit broke UTF-8 lexing, by changing the get_char
+	semantics on the input stream to wide character input.
+	Also, reading a query the command line (-c) must
+	read bytes from a UTF-8 encoding of the string.
+	We introduce a new get_byte function which can extract bytes
+	from streams which provide it.
+
+	* parser.l (YYINPUT): Call get_byte instead of get_char.
+
+	* stream.c (struct strm_ops): New function pointer, get_byte.
+	(stdio_get_byte): New function.
+	(stdio_ops, pipe_ops): Add new function.
+	(string_in_ops, string_out_ops, dir_ops): Null pointer added.
+	(struct byte_input): New struct type.
+	(byte_in_get_byte): New function.
+	(byte_in_ops): New structure.
+	(make_string_byte_input_stream, get_byte): New functions.
+
+	* stream.h (make_string_byte_input_stream, get_byte): New functions.
+
+	* txr.c (txr_main): Make a byte input stream from the command
+	line spec, rather than a string input stream.
+
+2009-11-12  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Continuing wchar_t conversion. Making sure all stdio calls
+	use wide character functions so that there is no illicit
+	mixing. (But the goal is to replace this usage with txr streams).
+
+	* lib.c (list, cobj_print_op, obj_print, obj_pprint): Use
+	wide string literals and I/O functions.
+
+	* match.c (debuglcf): Converted to wchar_t.
+	(dump_bindings, match_line, match_lines, extract): Use wide string
+	literal and I/O function.
+
+	* parser.h (yyerrorf): Declaration updated.
+
+	* parser.l (yyerror): Use wide-string yyerrorf. Users of
+	yyerror continue to pass multibyte strings.
+	(yyerrorf): Converted to wchar_t.
+	(yybadtoken, grammar): Use wide string literals to call yyerrorf.
+
+	* stream.c (struct strm_ops): vcformat changed to wchar_t.
+	(stdio_vcformat, string_out_vcformat, vcformat, cformat): Likewise.
+
+	* stream.h (vformat, vcformat, cformat): Declarations updated.
+
+	* txr.c (oom_realloc_handler, help, hint, txr_main): Use wide string
+	literals and I/O functions.
+
+	* unwind.c (uw_throwcf, uw_errorcf): Converted to wchar_t.
+
+	* unwind.h (uw_throwcf, uw_errorcf): Declarations updated.
+	(internal_error, numeric_assert, range_bug_unless): Macros
+	fixed to use wide string literals.
+
+2009-11-12  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* utf8.c (utf8_from): Fix total breakage.
+	Was writing out incomplete wide characters on internal
+	state transtions while traversing a single multi-byte character.
+	Also, improved handling of bad bytes close to EOF: if EOF
+	occurs in a multi-byte character, it will backtrack,
+	and skip one bad byte, etc.
+	(utf8_encode, utf8_decoder_init, utf8_decode): New functions.
+
+	* utf8.h (enum utf8_state): New enum.
+	(struct utf8_decoder, utf8_decoder_t): New struct.
+	(utf8_encode, utf8_decoder_init, utf8_decode): Declared.
+
+2009-11-12  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Documenting extended characters in man page.
+	Cleaned up some more issues related to extended characters.
+
+	* parser.l (grammar): Added error sctions for invalid UTF-8 bytes.
+
+	* stream.c (BROKEN_POPEN_GETWC): New macro. Enables workaround
+	for a glibc bug, whereby getwc blows up when applied to a FILE *
+	stream returned from a popen call.
+	(struct strm_ops): put_char function takes wchar_t.
+	(common_format): Use wchar_t rather than int.
+	(stdio_put_string): fputws returns -1, not EOF.
+	(stdio_put_char, put_cchar): Character argument changed to wchar_t.
+	Output done with putwc used instead of putc.
+	(snarf_line, stdio_get_char): Use getwc to read from the stream.
+	(pipe_close, make_pipe_stream): Implement workaround form glibc bug.
+
+	* stream.h (put_cchar): Declaration updated.
+
+	* txr.1: Added notes about international characters.
+
+2009-11-12  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Regular expression module updated to do unicode character sets.
+	Most of the changes are in the area of representing sets.
+
+	Also, a bug was found in the compilation of regex character sets:
+	ranges straddling two adjacent blocks of 32 characters were
+	not being added to the character set. However, ranges falling
+	within a single 32 block, or spanning three or more such blocks,
+	worked properly. This bug is not tickled by common ranges
+	such as A-Z, or 0-9, which land within a 32 block.
+
+	* regex.h (BITCELL_LIT): Macro removed.
+	(CHAR_SET_SIZE): Macro does not depend on UCHAR_MAX any more,
+	but hard-codes a set size of 256. UCHAR_MAX means nothing to us any
+	more since we are using wchar_t. The number 256 is simply an
+	arbitrarily chosen size for representing the small character
+	sets (or the leaves of the radix tree for representing large sets).
+	(chset_type_t): New enum typedef.
+	(cset_L0_t, cset_L1_t, cset_L2_t, cset_L3_t): New array typedefs.
+	(struct char_set): Replaced by union char_set.
+	(struct any_char_set, struct small_char_set, struct displaced_char_set,
+	struct large_char_set, struct xlarge_char_set): New struct types.
+	(char_set_clear): Declaration removed.
+	(char_set_create, char_set_destroy): Declared.
+	(char_set_add, char_set_add_range, char_set_contains,
+	nfa_state_single, nfa_state_set, nfa_machine_feed): Declarations
+	updated for wchar_t.
+	(struct nfa_state_single): member ch changed to wchar_t.
+
+	* regex.c (char_set_clear): Function removed.
+	(CHAR_SET_L0, CHAR_SET_L1, CHAR_SET_L2, CHAR_SET_L3, CHAR_SET_L2_L0,
+	CHAR_SET_L2_HI, CHAR_SET_L1_L0, CHAR_SET_L1_HI, CHAR_SET_L0_L0,
+	CHAR_SET_L0_HI): New macros.
+	(L0_full, L0_fill_range, L0_contains, L1_full, L1_fill_range,
+	L1_contains, L1_free, L2_full, L2_fill_range, L2_contains,
+	L2_free, L3_fill_range, L3_contains, char_set_create,
+	char_set_destroy): New functions.
+	(char_set_compl): Works using a flag rather than by actually
+	computing a complemented set. Also, is no longer a toggle (and
+	was never used that way).
+	(char_set_add, char_set_add_range, char_set_contains): Polymorphic over
+	the different set types.
+	(nfa_state_single, nfa_move, nfa_run, nfa_machine_feed): Converted
+	to wchar_t.
+	(nfa_state_free): Use char_set_destroy to free set.
+	(nfa_state_set): Does not construct the set internally but
+	takes it as a parameter.
+	(nfa_compile_set): Rewritten to perform two passes over the
+	s-expression representing the list of characters and ranges
+	making up the set.  The first pass determines what representation
+	will be used for the set. The second pass stuffs the characters and
+	ranges into the set.
+
+2009-11-11  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.c (main): call setlocale to set the LC_CTYPE to en_US.UTF-8,
+	so that the C library streams do the encoding. Once the program
+	is weaned from C library wide character stream I/O, this can go away.
+
+2009-11-11  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Big conversion to wide characters and UTF-8 support.
+	This is incomplete. There are too many dependencies on
+	wide character support from the C stream I/O library.
+	The regex code does not handle wide characters properly.
+	Character type is still int in some places, rather than wchar_t.
+	Test suite passes though.
+
+	* hash.c (hash_str): Converted to wchar_t.
+
+	* lib.c (progname, type_check, type_check2, type_check3,
+	car, cdr, car_l, cdr_l, equal, chk_strdup, string_own,
+	string, mkstring, mkustring, init_str, length_str,
+	c_str, search_str, sub_str, cat_str, split_str, trim_str,
+	chrp, apply, lazy_str, lazy_str_get_trailing_list,
+	cobj, obj_init, obj_print, obj_pprint, init): Converted to wchar_t.
+	(vector): Cast of chk_malloc return value added.
+	(string_utf8): New function.
+
+	* lib.h (struct string): Member str changed to wchar_t *.
+	(progname, chk_strdup, string_own, string, init_str,
+	c_str, init): Declarations updated.
+	(string_utf8): Declared.
+
+	* match.c (debugf, debuglf, sem_error, file_err, dump_shell_string,
+	dump_var, dump_bindings, dest_bind, match_line, do_output_line,
+	do_output, match_files): Converted to wchar_t.
+
+	* parser.h (spec_file): Declaration updated.
+
+	* parser.l (yy_errorf, char_esc, num_esc): Converted to wchar_t.
+	(ASC, ASCN, U, U2, U3, U4, UANY, UNANN, UONLY): New named
+	regexes, used for lexing utf-8.
+	(grammar): Converted to wchar_t and utf-8 handling.
+
+	* parser.y (%union/yystype): lexeme member changed to wchar_t *,
+	chr member changed to wchar_t.
+
+	* regex.c (nfa_run): Input string is wchar_t *.
+	(search_regex): String from haystack is wchar_t *.
+
+	* regex.h (nfa_run): Declaration updated.
+
+	* stream.c (struct strm_ops, common_vformat, stdio_stream_print,
+	stdio_maybe_read_error, stdio_maybe_write_error, stdio_put_string,
+	stdio_put_char, snarf_line, stdio_get_line, stdio_close, pipe_close,
+	struct string_output, string_out_put_string, string_out_put_char,
+	string_out_vcformat, dir_get_line, make_string_output_stream,
+	get_string_from-stream, make_dir_stream, get_line, get_char,
+	vformat, vcformat, format, cformat, put_string, put_cstring,
+	put_char, put_cchar, stream_init): Converted to wchar_t.
+
+	* stream.h (vformat, format, put_cstring): Declarations updated.
+
+	* txr.c  (version, progname, spec_file, oom_realloc_handler,
+	help, hint, remove_hash_bang_line, main, txr_main): Converted
+	to wchar_t.
+
+	* txr.h (version, progname): Declarations updated.
+
+	* unwind.c (uw_throw, uw_throwf, uw_errorf, type_mismatch,
+	uw_register_subtype): Converted to wchar_t.
+
+	* unwind.h (uw_throwf, uw_errorf, type_mismatch): Declarations updated.
+
+	* utf8.c, utf8.h: New files.
+
+2009-11-10  Kaz Kylheku  <kkylheku@gmail.com>
+
+	hash.c (hash_grow): Rewritten to avoid resizing the vector
+	in place, and thus having to pulling all conses into a big list.
+	TODO: avoid recomputing the hash function over the keys.
+	We could enhance cons cells with two more fields without using
+	additional storage.
+
+2009-11-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Changing representation of objects to allow for unboxed characters.
+	Now numbers and characters fit into a cell. We lose one more bit
+	from the range of numbers.
+
+	* lib.h (TAG_SHIFT, TAG_MASK, TAG_NUM, TAG_PTR, NUM_MASK, NUM_MIN,
+	is_ptr, is_num):  Macros updated.
+	(is_chr, tag): New macros.
+	(struct chr): Removed.
+	(union obj): Updated.
+
+	* lib.c (typeof, equal, chr, chrp, c_chr, obj_print): Updated.
+
+	* hash.c (ll_hash): Characters aren't pointers any longer;
+	use abstract accessor.
+
+2009-11-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Add hash removal.
+
+	* hash.c (remhash): New function.
+
+	* hash.h (remhash): Declared.
+
+2009-11-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Add hash table growth.
+
+	hash.c (hash_grow): New function.
+	(l_gethash): Renamed to gethash_l. Increment count; if load
+	factor gets to two, call hash_grow to double the size.
+
+	hash.h (l_gethash): Declaration changed to gethash_l.
+
+2009-11-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Changing representation of objects to allow the NUM type to be
+	unboxed. If the lowest bit of the obj_t * pointer is 1, then
+	the remaining bits are a number. A lot of assumptions are made:
+	- the long type can be converted to and from a pointer
+	- two's complement.
+	- behavior of << and >> operators when the sign bit is involved.
+
+	* lib.h (TAG_SHIFT, TAG_MASK, TAG_NUM, TAG_PTR, NUM_MASK, NUM_MIN,
+	is_ptr, is_num, type): New macros.
+	(struct num): Removed.
+	(nao): Redefined, so that it doesn't have the numeric tag.
+
+	* lib.c (typeof, type_check2, type_check3, car, car_l, cdr, cdr_l,
+	equal, consp, atom, listp, num, c_num, nump, plus, minus,
+	stringp, lazy_stringp, obj_print, obj_pprint): Fixed these
+	functions to use the new number representation, and not to deference
+	the obj_t * poitner if it is actually a number.
+	(obj_init): Adjusted values of maxint and minint.
+
+	* gc.c (mark_obj, gc_is_reachable): Avoid dereferencing numbers.
+
+	* hash.c (ll_hash): Likewise.
+
+	* match.c (match_line, do_output_line): Likewise.
+
+2009-11-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	First cut at hash tables. One known problem is allocation during gc,
+	due to use of boxed numbers for vector access.
+
+	* gc.c (gc): Disable gc when doing garbage collection, in case
+	something tries to allocate memory during gc, triggering a recursive
+	gc, which would be very bad. Also, call the new function,
+	hash_process_weak, in between the mark and sweep phases.
+	(gc_is_reachable): New function.
+
+	* gc.h (gc_is_reachable): Declared.
+
+	* lib.c (hash_t): New symbol global.
+	(acons_new_l): New function.
+	(obj_init): New symbol interned.
+
+	* lib.h (hash_t, acons_new_l): Declared.
+
+	* hash.c, hash.h: New files.
+
+	* Makefile: New target, hash.o.
+
+	* dep.mk: Regenerated.
+
+2009-11-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Throw exception on stream error during close, or I/O operations.  This
+	is needed for pipes that terminate abnormally or return failed
+	termination. Pipe and stdio streams have an extra description field
+	so they are printed in a readable way.
+
+	* lib.c (process_error): New global defined.
+	(obj_init): New symbol interned.
+	(lazy_stream_func): Pass t to close_stream, so exception
+	is thrown if the close fails.
+	(lazy_stream_cons): Ditto.
+	
+	* lib.h (process_error): Declared.
+
+	* match.c (complex_snarf): Pass new desr argument to make_stdio_stream
+	and make_pipe_stream.
+
+	* stream.c (strm_ops): New argument on close function pointer.
+	(common_destroy): Close without throwing exception. For objects
+	being finalized, we don't care if the close works or not; the
+	program has shown that it doesn't care about the stream by
+	letting it become unreachable, so we don't bother the program
+	by throwing an exception.
+	(stdio_handle): New struct.
+	(stdio_stream_print, stdio_stream_destroy, stdio_stream_mark,
+	stdio_maybe_read_error, stdio_maybe_write_error): New functions.
+	(stdio_put_string, stdio_put_char, stdio_get_line, 
+	stdio_get_char, stdio_vcformat, stdio_close): Updated to new
+	handle format, and throw errors now.
+	(stdio_ops, pipe_ops): Redirected to new functions stdio_stream_print,
+	stdio_stream_destroy and stdio_stream_mark.
+	(pipe_close): Updated to new handle format. Parses status from
+	pclose and throws exceptions appropriate to the situation.
+	(dir_close): Takes extra argument.
+	(make_stdio_stream, make_pipe_stream): New argument added.
+	(make_string_output_stream): Some casts added. 
+	(close_stream): Pass new argument down to virtual function.
+	(stream_init): Pass new argument to make_stdio_stream
+	when creating streams for stdin, stdout and stderr.
+
+	* stream.h (make_stdio_stream, make_pipe_stream, close_stream):
+	Declarations updated.
+
+	* txr.c (txr_main): Pass new argument to make_stdio_stream.
+
+	* unwind.c (uw_init): Register process_error.
+
+2009-11-01  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 020
+
+	Improved documentation.
+
+	Building via configure script.
+
+	Support for cross compiling support.
+
+	Support for building in separate build directory.
+
+	Internal bugfixes.
+
+	Portability bugs fixed; works on x86-64 GNU/Linux.
+
+2009-11-01  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Bug ID 27898: Directory order dependencies in test case.
+	Converted some directories to text files.
+
+	* tests/002/proc/*/task: Directories removed.
+
+	* tests/002/proc/*/tasks: Files created.
+
+	* tests/002/query-1.txr: Query updated.
+
+	* tests/002/query-1.expected: Expected output updated.
+
+2009-11-01  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Bug ID 27895: Calls to protect have an argument list terminated
+	by the integer constant 0 rather than a proper null pointer constant.
+
+	lib.c (obj_init): Properly terminate argument list of protect call.
+
+	stream.c (stream_init): Likewise.
+
+	unwind.c (unwind_init): Likewise.
+
+	txr.c (txr_main): two-argument protect calls rewritten using prot1.
+
+2009-11-01  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Bug ID 27899: Garbage collection problem: method of locating stack
+	bottom is unreliable due to the unpredictable allocation order of local
+	variables. The addresses of stack_bottom_0 and stack_bottom_1 variables
+	do not necessarily bracket the others which means that some local
+	variables in main can be out of the reach of the garbage collector:
+	our stack bottom is wrongly in the middle of the frame.
+
+	* lib.c (init): Removed one of the stack bottom parameters, so there
+	is only one. This is passed straight down to gc_init.
+	Also noticed that the oom_realloc variable was not being set
+	from the oom parameter.
+
+	* lib.h (init): Declaration updated.
+
+	* txr.c (txr_main): New static function.
+	(main): Calls init, and then txr_main. The idea is that txr_main
+	should get fresh stack frame. So the stack_bottom variable in main
+	should be outside of that stack frame.
+
+2009-10-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (equal): Fix broken LSTR and FUN cases.
+
+2009-10-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Got "make tests" working in separate build directory,
+	with .out files going to local tests/ tree.
+
+	* Makefile (depend): Refer to depend.txr and dep.mk
+	using $top_srcdir; no need for symlinks.
+	Changed a few more ./txr references to use $(PROG).
+	(TESTS): Path munging to generate targets with local paths.
+	(%.ok): Fixed diff logic to compare between .expected file
+	in $(top_srcdir) and local .out file.
+
+	* configure: Don't generate symlinks for tests and dep.mk.
+
+2009-10-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Got "make install" working.
+
+	* Makefile (install): New target.
+
+	* configure (mandir, bindir): New variables.
+
+2009-10-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Got build to work in separate build directory.
+
+	* Makefile (CFLAGS): Added -I flag to point header inclusion to the
+	source directory.
+	(PROG): New variable to hold program name.
+	(VPATH): Variable set, as a quick and dirty way to get GNU make
+	to find the prerequisites back in the source directory.
+	* configure: Added steps to symlink the tests directory and dep.mk.
+	* depend.txr: Modified to generate the dependencies with
+	correct references to the top_srcdir, with the exception of
+	locally generated headers.
+	* dep.mk: Regenerated.
+
+2009-10-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Build configuration via configure script, with cross compiling support.
+	(Tested by cross-compiling txr on an x86 GNU/Linux system
+	to run on a MIPS-based GNU/Linux system).
+
+	* configure: New script.
+	* Makefile: (OPT_FLAGS, LANG_FLAGS, DIAG_FLAGS, DBG_FLAGS,
+	LEX_DBG_FLAGS, TXR_DBG_OPTS, LEXLIB): Variables removed;
+	these are now generated in config.make by configure.
+	(config.make): New target to print friendlier diagnostic if
+	the build is not configured.
+	(distclean): New target to do clean, plus remove config.make.
+
+2009-10-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.l (YY_INPUT): Kill tabs with spaces (how did they sneak in?).
+	Fix possible use of uninitialized ch.
+
+2009-10-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Fixed misleading wording (separation versus termination).
+	Added Introduction headings to some major sections.
+	Improved exception handling intro.
+
+2009-10-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 019
+
+	Regexps can be bound to variables.
+
+	New freeform directive.
+
+	* txr.c (version): Bump.
+	* txr.1: Bump version and date.
+
+	* lib.c, match.c, regex.c, regex.h, stream.c: Trailing whitespace
+	removed from lines.
+
+2009-10-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Documented freeform.
+
+2009-10-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Change the freeform line catenation semantics to termination
+	rather than separation.
+
+	* lib.h (lazy_str): Declaration updated.
+
+	* lib.c (lazy_str): Tack terminator onto initial prefix
+	string. Parameter renamed. Also, terminator string cached
+	in the object.
+	(lazy_str_force, lazy_str_force_upto): Terminate, rather
+	than separate.
+
+	* match.c (match_files): sep variable renamed to term.
+
+2009-10-21  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* gc.c (mark_obj): Bugfix: recurse over recently added
+	member, opts, in the lazy_string structure.
+
+2009-10-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Got regex working over lazy strings from freeform.
+
+	Bugfixes.
+
+	* lib.c (length_str): Fixed recursion to wrong length function.
+	(lazy_str_force):  March down list properly. Update lazy
+	string's limit value.
+
+	* match.c (match_line): Convert to lazy-string-aware style; i.e.
+	avoidance of triggering a force of the whole string.
+	(match_files): Bugfix in argument processing of freeform directive.
+
+	* regex.h (nfam_result_t): New typedef.
+	(nfa_machine_reset): New function declaration.
+	(nfa_machine_feed): Updated declaration.
+
+	* regex.c (nfa_machine_init): Refactor to use nfa_machine_reset.
+	(nfa_machine_feed): Return nfam_result_t rather than just int.
+	(search_regex, match_regex): Refactor to work with lazy strings well.
+
+2009-10-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Implement custom separator and limit in freeform.
+
+	* lib.h (lazy_string): New struct member, opts.
+	(lazy_str): Declaration updated.
+
+	* lib.c (lazy_str): New constructor parameters to set the
+	seprator string and numeric line limit.
+	(lazy_str_force, lazy_str_upto): Honor the line limit,
+	and use the separator string if provided.
+
+	* match.c (match_files): Process the arguments for freeform
+	directive.
+
+2009-10-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (sub_str): Avoid invoking c_str which forces the
+	lazy string.
+
+2009-10-20  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Start of implementation for freestyle matching.
+
+	Lazy strings implemented, incompletely.
+
+	Changed string function to implicitly strdup; non-strdup
+	version changed to string_own. Fixed wrong uses of strdup
+	rather than chk_strdup.
+
+	Functions added to regex module to provide regex matching
+	as a state machine to which characters are fed.
+
+	* lib.h (type_t): New enum member LSTR, for lazy strings.
+	(lstr_t, freestyle, type_check3, string_own): Declared.
+	(string): Parameter changed to const char *.
+	(lazy_stringp, split_str, lazy_str, lazy_str_force_upto,
+	lazy_str_force, lazy_str_get_trailing_list, length_str_gt,
+	length_str_ge, length_str_lt, length_str_le): Declared.
+
+	* lib.c (lstr_t, freestyle): New symbol globals.
+	(code2type, obj_print, obj_pprint, equal): Extended to handle LSTR.
+	(type_check3): New function.
+	(string_own): New function; does what string used to do.
+	(string): Duplicates the string with strdup, so callers don't have to.
+	(mkstring, copy_str, trim_str): Use string_own.
+	(stringp): A lazy string is a kind of string.
+	(lazy_stringp): New function.
+	(length_str, c_str, search_str, sub_str, chr_str,
+	chr_str_set): Handle lazy strings.
+	(split_str): New function.
+	(lazy_str, lazy_str_force_upto, lazy_str_force,
+	lazy_str_get_trailing_list, length_str_gt, length_str_ge,
+	length_str_lt, length_str_le): New functions.
+	(obj_init): New symbols interned. Eliminated strdup calls.
+	
+	* gc.c (finalize, mark_obj): Changed to handle LSTR type.
+	Eliminated default case from switch so we get a gcc
+	diagnostic if a case is not handled.
+
+	* match.c (match_files): Eliminated strdup calls.
+	Added freeform directive.
+
+	* parser.y (grammar): Changed string calls to string_own.
+
+	* stream.c (stdio_get_line, get_string_from_stream):
+	Changed string calls to string_own.
+	(dir_get_line): Eliminated chk_strdup call.
+
+	* txr.c (remove_hash_bang_line, main): Eliminated strdup calls.
+
+	* regex.h (nfam_result): New union.
+	(nfa_machine, nfa_machine_t): New struct and typedef.
+	(nfa_machine_init, nfa_machine_cleanup, nfa_machine_feed,
+	nfa_machine_match_span): New functions declared.
+
+	* regex.c (nfa_machine_init, nfa_machine_cleanup, nfa_machine_feed,
+	nfa_machine_match_span): New functions defined.
+
+2009-10-18  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Trivial change allows regexps to be bound to variables,
+	and used for matching. This Just Works because of
+	the way match_line treats variables.
+
+	* match.c (eval_form): Check for a regexp form and return
+	it as a value representing itself.
+	* regex.c (regexp): New function.
+	* regex.h (regexp): Declared.
+
+2009-10-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* deps.mk: Updated.
+
+2009-10-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 018
+
+	Bugfixes: mistakes in debugging calls; infinite looping
+	bug in collect; skip directive not advancing match
+	by proper number of lines bug.
+
+	* match.c (debuglcf): Cosmetic fix.
+	(match_files): After recognizing nothrow in the file spec,
+	replace it by a string. A few places expect first(files) to be
+	a string. The skip directive must return whatever
+	return value it obtained from the nested match_files call,
+	and not substitute the current line number, so that the
+	caller can proceed past the correct number of lines that
+	were matched. Fixed obj_t * being passed to %s printf specifier
+	in debug printf. Collect directive must make progress even
+	if the nested spec makes no progress (returns successfully,
+	but with the original line number).
+	* txr.c (version): Bump.
+	* txr.1: Bump version and date.
+	* txr/tests/004/query-1.txr: New test case.
+	* tests/004/query-1.expected: Expected result for new test case.
+
+2009-10-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 017
+
+	Bugfix in exception subtype definition (defex).
+
+	Tail recursion in marking function of garbage collector.
+
+	-f option for specifying query file, allowing more
+	options to follow, useful in hash-bang scripting and
+	other situations.
+
+	* txr.c: (version): Bump to 016
+	* txr.1: Bump version to 016.
+
+2009-10-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Documented defex.
+	* unwind.c (uw_register_subtype): Bugfix: if the subtype
+	exists already, we must not delete it and create a new entry, but
+	destructively point its entry to its assigned supertype.
+	An exceptions is thrown rather than abort for attempts
+	to make t a subtype of something other than itself.
+	An attempt to make something other than nil a subtype of nil
+	is diagnosed.  Attempts to redefine the relationship
+	between two types if they are already connected by one;
+	this covers circularity and other cases, while still allowing
+	a relaxed order of definition.
+
+2009-10-17  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* gc.c (mark_obj_tail): New macro.
+	(mark_obj): Optimized with manual tail recursion.
+	The funtion will no longer generate long call stacks
+	for long lists. Descending to the car field of
+	a cons is still recursive, but ``car-heavy''
+	trees are rare.
+
+2009-10-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Resurrect -f option, with different meaning.
+	We need "-f query-file" so that hash-bang scripts
+	can be written which can pass options to txr.
+
+	* txr.c (help, main): Inplement and document -f.
+	Also bugfix: do not throw file open errors as exceptions
+	of type error, because these cause an abort, potentially leading to a
+	core dump. They are now thrown as file_error.
+	* txr.1: Documented -f.
+
+2009-10-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Implemented @(next arg) for treating the command line
+	as an input source.
+
+	* txr.1: Updated, and fixed a few unrelated mistakes.
+	* lib.c (dir): Removed unused symbol globa.
+	(args): New symbol global.
+	* lib.h (dir): Declaration removed.
+	(args): Declared.
+	match.c (match_files): Implemented @(next arg).
+	Had to hack laziness to the file opening logic in match_files.
+	If the function is entered with a spec whose first
+	directive is @(next), then it defers opening the first
+	file in the list of files (since it will be immediately
+	abandoned in favor of another input source).
+	This prevents an error in the situation when the
+	arguments do not name files, and there is a @(next args)
+	directive to process them as an input source.
+
+2009-10-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 016
+
+	Catch clauses with parameters.
+
+	Directive for throwing exceptions: throw.
+
+	Directive for defining exception types: defex.
+
+	-f option renamed to -c.
+
+	* txr.c: (version): Bump to 016
+	* txr.1: Bump version to 016.
+
+2009-10-16  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.c (help, main): Changed -f argument to -c. This
+	is consistent with the -c argument of the shell;
+	-f looks like awk's -f option, which specifies a file,
+	not a literal script body.
+
+	* txr.1: Updated.
+
+2009-10-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: Grammar, spelling.
+
+2009-10-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.y (clauses_opt): Long overdue nonterminal added.
+	(define_clause) simplified with clauses_opt.
+	(try_clause): Error handling improved.
+	(catch_clauses_opt): Catch and finally clauses can be empty.
+	Error cases added.
+	* txr.1: Updated.
+
+2009-10-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_files): Use alist_remove1 for a one
+	element removal.
+
+2009-10-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* unwind.c (uw_throw): Add program prefix before
+	unhandled exception text. Print it in the
+	standard notation if it's not a string literal.
+	* match.c (sem_error, file_err): Don't stick program
+	prefix into exception text.
+
+2009-10-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* unwind.c (uw_exception_subtype_p, uw_init):
+	Slight change in representation for exception subtypes,
+	saving one node in the list.
+
+2009-10-15  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New throw and defex directives, catches with arguments.
+
+	* lib.c (defex, throw): New symbol globals.
+	(obj_init): Symbols interned.
+	* lib.h (defex, throw): Declared.
+	* match.c (match_files): Implemented throw and defex.
+	Argument handling in catches.
+	* unwind.c (uw_register_subtype): Returns right
+	argument, so we can cleverly use it with reduce_left.
+	* unwind.h (uw_register_subtype): Declaration updated.
+	* txr.1: Updated.
+
+2009-10-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 015
+
+	Code restructuring.
+
+	Corruption bugfix in gc-debugging code.
+
+	The nil symbol more properly implemented.
+
+	Semantics change: collect treated as a failed match if it
+	does not collect anything.
+
+	Bugfix in function argument reconciliation: must only
+	be done for unbound parameters.
+
+	New @(local) directive (synonym of forget) for expressing
+	local variables in functions.
+
+	Quasi-literals: backquote-delimited literals that contain interpolated
+	variables. Useful in next, output, bind and function calls.
+
+	Hygiene: some implementation-inserted syntax tree elements
+	are now in their own namespace so they can't clash with user-defined
+	constructs.
+
+	Rewritten streams implementation.
+
+	Exception handling: try/catch/finally.
+
+	Exceptions used internally and externally.
+
+	File errors are mapped to exceptions now.
+
+	Hash bang (#!) scripting supported.
+
+	New -f paramater, allowing entire query to be specified
+	as argument rather than from a file or stdin.
+
+	* txr.c: (version): Bump to 014.
+	* txr.1: Bump version to 014. More documentation about
+	exceptions.
+
+2009-10-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Support for hash bang execution, and embedding query
+	in a command line argument.
+
+	* txr.c (remove_hash_bang_line): New function.
+	(main): Added -f option. Initialize and gc-protect yyin_stream, and
+	use it in all places where yyin was previously set up.
+	Diagnose when -a, -D and -f are wrongly clumped with other options.
+	Remove the first line of the query if it starts with #!.
+	* parser.h (yyin): Declaration removed.
+	(yyin_stream): Declared.
+	* parser.l (YY_INPUT): Macro defined.
+	(yyin_stream): New global.
+	* stream.c (string_in_get_line, string_in_get_char): Bugfix:
+	wrong length function used.
+	(string_in_ops): Bugfix: wrong get_char function wired in.
+	(get_char): New function.
+	* stream.h (get_char): Declared.
+	* txr.1: -f option documented.
+
+2009-10-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (obj_print, obj_pprint): Print #<garbage ...>
+	syntax if an object has a bad type code; do not just return
+	without printing anything.
+
+2009-10-14  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Code cleanup and documentation.
+
+	* txr.1: Start documenting quasiliterals, exception handling and
+	nothrow in next and output.
+	* parser.y (catch_clauses_opt): Add missing empty production, so that
+	a try block doesn't have to have a finally clause.
+	* lib.h (or2, or3, or4): New macros.
+	* match.c (match_files): Allow output and next forms which just
+	have one argument that is nothrow, as documented.
+	* stream.c common_vformat, string_out_vcformat, string_out_vcformat,
+	make_string_output_stream, make_dir_stream, close_stream, get_line,
+	vformat, vcformat, format, cformat, put_string, put_cstring,
+	put_char): Switch to new style type assertions.
+
+2009-10-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New syntax for next and output directives, taking advantage
+	of quasi-literals. Non-throwing behavior can be specified in
+	both using nothrow. The old syntax is supported, and has
+	the old semantics (non-throwing). Hence, the test cases
+	pass again without modification.
+
+	File open errors thrown as file_error type.
+
+	* lib.c (nothrow, file_error): New symbol globals.
+	(obj_init): New symbols interned.
+	* lib.h (nothrow, file_error): Declared.
+	* match.c (file_err): New function.
+	(eval_form): Bugfix: if input is nil, or an atom other than a symbol,
+	return the value hoisted into a cons. A nil return strictly means,
+	unbound variable.
+	(match_files): Support new syntax for next and and output.
+	Throw open errors as file_err.
+	* parser.l (grammar): Change how OUTPUT is returned to the
+	style similar to DEFINE, so interior forms can be parsed.
+	* parser.y (grammar): Fix up output_clause with new syntax.
+	* unwind.c (uw_throw): Do not abort on unhandled file_error,
+	but terminate with a failed status.
+	(uw_init): Register file_error as a subtype of error exception.
+
+2009-10-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	First cut at working try/catch/finally implementation.
+
+	* lib.c (try, catch, finally): New symbol globals.
+	(obj_init): New symbols interned.
+	* lib.h (try, catch, finally: Declared.
+	* parser.y (TRY, CATCH, FINALLY): New tokens.
+	(try_clause, catch_clauses_opt): New nonterminal grammar symbols.
+	* parser.l (yybadtoken): TRY, CATCH and FINALLY handled.
+	(grammar): New cases for try, catch and finally.
+	* unwind.h (struct uw_catch): New member called visible.
+	(uw_continue): New parameter added.
+	(uw_exception_subtype_p): Declared.
+	(uw_catch_begin): Macro rewritten to use switch logic
+	around setjmp.
+	(uw_do_unwind, uw_catch, uw_unwind): New macros.
+	(uw_catch_end): Rewritten to close switch, and automatically
+	continue the unwinding if the block is entered as an unwind.
+	* unwind.c (uw_unwind_to_exit_point): Exception catching
+	frames made invisible via new flag prior to control passing to them.
+	longjmp code 2 introduced for distinguishing a catch from
+	an unwind. Visibility flag is checked and invisible frames
+	are skipped.
+	(uw_push_catch): cont member of the unwind frame initialized to zero.
+	(exception_subtype_p): Renamed to uw_exception_subtype_p, changed
+	to extern. Fixed wrong order of arguments to assoc.
+	(uw_throw): Honor visibility flag: do not consider invisible
+	catch frames.
+	(uw_register_subtype): sup/sub mixup bugfix.
+	(uw_continue): Takes extra argument: the continuation frame
+	that (re)establishes the exit point for the unwinding.
+	This allows nested unwinding action to take place in a finally,
+	and then to continue to the original exit point.
+	* match.c (match_files): Handling for try directive added.
+
+2009-10-13  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* parser.l (yybadtoken): Bugfix: added missing LITCHAR case.
+	* unwind.h (internal_error): Fixed broken macro.
+	* match.c (match_line, match_files): sem_error bugfix: used %a instead
+	of ~a.
+	(match_files): Wrap block handler in compound statement, otherwise the
+	macroexpansion declares a variable in the middle of a statement, which
+	is a gcc extension to C90 (or a C99 feature,
+	but we aren't using C99).
+
+2009-10-08  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Exception handling for query errors.
+	Verbose logging decoupled from yyerror functions.
+	Superior object-oriented formatting used for cleaner code.
+
+	* lib.c (query_error): New symbol global.
+	(obj_init): New symbol interned.
+	* lib.h (query_error): Declared.
+	* match.c (output_produced): Variable changed to external linkage.
+	(debugf, debuglf, debuglcf, sem_error): New static functions.
+	(dest_bind, match_line, match_files): Regtargetted away from
+	the yyerrorf and yyerrorlf functions to use debugf,
+	debuglf, debuglcf for logging and sem_error for throwing
+	query errors as exceptions.
+	* parser.h (spec_file_str): New global declared.
+	* parser.l (yyerror): Calls yyerrorf instead of yyerrorlf;
+	lets yyerrorf increment error count.
+	(yyerrorf): Loses level argument.
+	(yyerrorlf): Function removed.
+	(yybadtoken): Retargetted from yyerrorlf to yyerrorf.
+	(grammar): yyerrorf call fixed up.
+	* txr.c (spec_file_str): New global defined.
+	(main): Protects new global against gc, and initializes it.
+	* unwind.c (uw_throw): If an unhandled exception is of
+	type query_error, it results in an exit rather than abort.
+	The false string is conditionally printed.
+	(uw_init): Register query_error as subtype of error.
+
+2009-10-08  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Exception handling framework implemented.
+
+	* lib.c (cobj_t, error, type_error, internal_err, numeric_err,
+	range_err): New symbol globals.
+	(prog_string): New string global.
+	(code2type): New static function.
+	(typeof): Rewritten using code2type.
+	(type_check, type_check2): New static functions.
+	(car, cdr, list, plus, minus, length_str, chr_p, chr_str,
+	chr_str_set, apply, funcall, funcall1, funcall2,
+	vec_get_fill, vecref_l, lazy_stream_cons): Checks and
+	assertions rewritten using new functions and macros.
+	(obj_init): prog_string protected from gc.
+	New symbols interned.
+	(init): uw_init() call moved after obj_init() because
+	it needs stable symbols.
+	* lib.h (cobj_t, error, type_error, internal_err, numeric_err,
+	range_err, prog_string, type_check, type_check2): Declared.
+	* match.c (dump_var, complex_snarf, complex_close): abort
+	calls rewritten to use exception handling.
+	* regex.c (nfa_all_states, nfa_closure, nfa_move): Likewise.
+	* stream.c (string_out_vcformat): Bugfix: fill index not updated.
+	(make_string_output_stream): Bugfix: initial buffer not null terminated.
+	(get_string_from_stream): New function.
+	* stream.h (get_string_from_stream): Declared.
+	* txr.c (main): Some error prints turned to throws.
+	* unwind.c (unwind_to_exit_point): Supports UW_CATCH frames,
+	whose finalization logic has to be invoked during unwinding,
+	and as target exit points.
+	(uw_init): Installs exception symbols into
+	subtyping hirearchy.
+	(uw_push_catch, exception_subtype_p, uw_throw, uw_throwf,
+	uw_errorf, uw_throwcf, uw_errorcf, type_mismatch,
+	uw_register_subtype, uw_continue): New functions.
+	(exception_subtypes): New static global.
+	* unwind.h (noreturn): New macro, conditionally defined on __GNUC__.
+	(enum uw_frtype): New member, UW_CATCH.
+	(struct uw_catch): New struct type.
+	(union uw_frame): New member, ca.
+	(uw_push_catch, exception_subtype_p, uw_throw, uw_throwf,
+	uw_errorf, uw_throwcf, uw_errorcf, type_mismatch,
+	uw_register_subtype, uw_continue): New functions declared.
+	(uw_catch_begin, uw_catch_end, internal_error, type_assert,
+	bug_unless, numeric_assert, range_bug_unless): New macros.
+
+2009-10-07  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Rewritten streams implementation.
+
+	* stream.h, stream.c: New files.
+	* Makefile (OBJS): New object file stream.o.
+	* dep.mk: Dependencies updated.
+	* gc.c (finalize): STREAM case removed.  Call destroy only if not null.
+	(mark_obj): STREAM case removed.
+	* lib.c (push, pop): New functions.
+	(equal): STREAM case removed.
+	(sub_str): Allow from parameter to be nil, defaulting to zero.
+	(stdio_line_read, stdio_line_write, stdio_close, stdio_line_stream,
+	pipe_close, pipe_line_stream, dirent_read, dirent_close,
+	dirent_stream, stream_get, stream_pushback, stream_put,
+	stream_close): Functions removed.
+	(stream_ops dirent_stream_ops, stdio_line_stream_ops,
+	struct stream_ops, pipe_line_stream_op): Static structs removed.
+	(lazy_stream_func, lazy_stream_cons): Retargetted to new streams.
+	(cobj_print_op): Likewise.
+	(init): Disables and restores GC, instead of doing it in obj_init.
+	(obj_print): Retargetted to new streams.
+	(obj_pprint): New function.
+	(obj_init): Does not manipulate gc_state any more, moved to init.
+	Call to stream_init added.
+	(d, snarf): Retargetted to new streams.
+	(snarf_line): Removed, now appears in stream.c, retargetted
+	to new streams.
+	* lib.h (enum type): STREAM removed.
+	(struct stream, struct stream_ops): Removed.
+	(struct cobj_ops): Retargetted to new streams.
+	(union obj): sm member removed.
+	(push, pop, obj_pprint): Declared.
+	(stdio_line_stream, pipe_line_stream, dirent_stream, stream_get,
+	stream_pushback, stream_put, stream_close, snarf_line): Removed.
+	(cobj_print_op, dump, snarf): Modified.
+	* match.c (dump_bindings, complex_snarf): Retargetted to new streams.
+	* txr.c (main): format used to dump bindings and specs in verbose mode.
+
+2009-10-07  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Implemented quasi-literals: string literals which may
+	contain variables to be interpolated.
+
+	Also, took care of a hygiene problem with respect to some
+	parser-generated forms, which must be invisible to the user.
+
+	* Makefile (LEX_DB_FLAGS): New variable; helpful
+	in generating a lexical analyzer with debug tracing.
+	* parser.l (nesting, closechar): Static variables removed.
+	(char_esc): Add \` escape for quasi-literals.
+	(stack): New %option, to generate a scanner which has
+	a start condition stack.
+	(QSILIT): New start condition.
+	(grammar): Refactored to use start condition stacks.
+	Quasi-literal lexical analysis added.
+	* parser.y (lit_char_helper): New function, for factoring out
+	some common logic between string literals and quasi literals.
+	(quasilit, quasi_item, quasi_items): New grammar symbols and
+	production rules.
+	(strlit): Rule shortened with new helper function.
+	Bugfix: error case assigns nil to $$.
+	(chrlist): Bugfix: error case assigns nil to $$.
+	(LITCHAR): Added to %prec table to fix shift-reduce problem.
+	(expr): Production now can generate a quasilit.
+	* lib.c (quasi): New symbol global.
+	(obj_init): Intern quasi as "$quasi", so the user can
+	make a function called quasi.  Also, var and regex are now interned
+	with the names "$var" and "$regex" for the same reason.
+	* lib.h (quasi): Declared.
+	* match.c (eval_form): Rewritten with recursive processing
+	to handle deeply embedded variables, as well as quasi-strings.
+	(subst_vars): Handles quasi-strings.
+	(match_files): Function calls now use eval_form for function
+	argument evaluation, except of course in the special case that if an
+	argument is a symbol, it may be unbound.
+
+2009-10-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_files): No error message for merging to
+	a symbol which is already bound; the existing behavior
+	is to destructively update the binding, which is useful,
+	and so the error is pointless.
+
+2009-10-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Introduce local as synonym to forget. It does exactly the
+	same thing; a previous binding is forgotten. This spelling
+	is nicer for functions.
+	* lib.h (local): Declared.
+	* lib.c (local): Defined.
+	(obj_init): New symbol interned.
+
+2009-10-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Bugfix: function parameter reconciliation (after function call
+	completes) must only consider the unbound parameters.
+	Otherwise false mismatches result if the function destructively
+	manipulated some bindings of bound parameters.
+	E.g. @(define foo (a)) is called as @(foo "bar") and internally
+	it rebinds bound parameter a to "baz". This situation is
+	not a mismatch. The rebinding is thrown away.
+
+	* match.c (match_files): When processing a function call,
+	keep an alist which associates arguments and unbound parameters.
+	Then, after the function call, process the alist, rather
+	than the full parameter list.
+
+2009-10-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Semantics change: collect fails if it does not collect
+	anything. Non-failing behavior can be obtained by
+	wrapping with @(maybe) (but no such workaround for coll yet).
+
+	* match.c (match_line): Return nil if coll collected nothing.
+	(match_files): Return nil if collect collected nothing.
+
+
+2009-10-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Bugfix: nil must be on the list of interned symbols.
+
+	* lib.c (sym_name): Function removed. This was like
+	symbol_name but did not accept nil.
+	(intern): Use symbol_name instead of sym_name, allowing
+	nil to be on the list of interned symbols.
+	(obj_init): Add nil to interned_syms list.
+	(nil_string): Changed from "NIL" to "nil".
+	* match.c (dest_bind): Treat nil as a value, not a symbol.
+	(match_files): Treat nil as a value when it's
+	a function argument.
+
+2009-10-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* gc.c (more): Bugfix: free_tail was incorectly calculated,
+	thereby destroying the validity of the FIFO recycling algorithm
+	used when GC debugging is enabled. This showed up as mysterious
+	assertions and crashes.
+	(mark_obj): Do not abort if a free object is marked.
+	(mark_mem_region): Renamed bottom and top variables to low
+	and high. The naming was confusing inverted relative
+	to that in the caller.
+	(sweep): Abort if somehow a block is free and marked reachable.
+
+2009-10-06  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* match.c (match_files): Fixed nonexitent symbol warning for merge
+	directive (complained about wrong symbol).
+
+2009-10-05  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Refactoring matching code.
+
+	* lib.h (cobj_ops): New function pointer, mark.
+	* gc.c (mark_obj): For a COBJ type, call the mark function
+	if the pointer is non-null.
+	(gc_mark): New public function, wrapper that calls
+	the private mark_obj. Implementations of mark for COBJ
+	objects will need to call this.
+	* gc.h (mark_obj): Declared.
+	* regex.c (regex_obj_ops): Explicitly initialize mark function pointer
+	 to null.
+
+2009-10-05  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Code restructuring.
+
+	* Makefile (match.o): New object file.
+	(depend): New rule for generating dep.mk, using txr.
+	(lib.o, lex.yy.o, regex.o, y.tab.o unwind.o, txr.o, match.o, gc.o):
+	Dependency rules removed.
+	* dep.mk: New make include file; captures dependencies. Generated
+	by new depend rule in Makefile, using txr.
+	* depend.txr: Txr query to generate dependencies.
+	* extract.y: File renamed to parser.y
+	(output_produced): Variable removed,
+	moved into new file match.c.
+	(dump_shell_string, dump_shell_string, dump_var, dump_bindings, depth,
+	weird_merge, map_leaf_lists, dest_bind, eval_form, match_line,
+	format_field, subs_vars, complex_open, complex_open_failed,
+	complex_close, complex_snarf, robust_length, bind_car, bind_cdr,
+	extract_vars, extract_bindings, do_output_line, do_output,
+	match_files, extract): Functions removed, added to match.c.
+	(struct fpip): Definition removed, added to match.c
+	(<stdlib.h>, <string.h>, <ctype.h>, <errno.h>, <setjmp.h>,
+	"gc.h", "unwind.h"): Unneeded headers removed.
+	* match.c: New file.
+	* extract.l: Renamed to parser.l.
+	* extract.h: Renamed to parser.h.
+	(opt_loglevel, opt_nobindings, opt_arraydims, version, progname):
+	Declarations moved to txr.h.
+	(extract): Dclaration moved to match.h.
+	* txr.h, match.h: New headers.
+	* gc.h (opt_gc_debug): Moved to txr.h.
+
+2009-10-03  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 014
+
+	New cases directive.
+
+	New define directive: user-defined dynamically scoped functions.
+
+	String literals in bind and function calls.
+
+	EOF in the middle of a line handled properly.
+
+	* extract.l (version): Bump to 014.
+	* txr.1: Bump version to 014.
+
+
+2009-10-02  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New cases directive.
+
+	* extract.l (yybadtoken): Add case for CASES.
+	(grammar): Tokenize cases directive.
+	* extract.y (CASES): New token kind.
+	(cases_clause): New grammar symbol.
+	(grammar): Implement new grammar cases.
+	(match_files): Implement semantics for cases.
+	* lib.c (cases): New global.
+	(obj_init): Intern cases symbol.
+	* lib.h (cases): Declared.
+	* txr.1: Documented.
+
+2009-10-02  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Support for string and character literals.
+
+	* extract.l (char_esc): Support \' and \" escapes.
+	(STRLIT, CHRLIT): New flex start conditions.
+	(grammar): New rules for tokenizing string literals.
+	* extract.y (LITCHAR): New token kind.
+	(strlit, chrlit, litchars): New grammar symbols.
+	(grammar): Implement string literal parsing.
+	(dump_var): Support character objects, treating
+	them as one-character strings.
+	(eval_form): New function.
+	(match_files): In bind directive, allow the right
+	hand side to be an arbitrary object.
+	* lib.c (mkustring, init_str): New functions.
+	(cat_str): Allow characters in the mix, treating
+	them as one-character strings.
+	* lib.h (mkustring, init_str): Declared.
+	(chrp, chr_str, chr_str_set): New function.
+	* txr.1: Documented.
+
+2009-10-02  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Support for query-defined functions.
+
+	* extract.l (yybadtoken): New DEFINE case.
+	(NESTED): New flex start condition.  This allows for different lexing
+	rules in nested lists, so even though for instance @(collect) is a
+	special token @((collect)) isn't.
+	(grammar): Refactored with NESTED.
+	Tokenize define directive.
+	* extract.y (define_transform): New function.
+	(DEFINE): New token kind.
+	(define_clause): New grammar symbol.
+	(match_files): Implement define semantics, and function calls.
+	* lib.c (define): New global.
+	* lib.h (define): Declared.
+	(proper_listp, alist_remove1, copy_cons, copy_alist): New functions.
+	(obj_init): Intern define symbol.
+	(init): Call new function uw_init.
+	* unwind.c (toplevel_env): New static structure.
+	(uw_unwind_to_exit_point): Support new UW_ENV frame type.
+	(uw_init, uw_find_env, uw_push_env, uw_get_func, uw_set_func): New
+	functions.
+	* unwind.h (UW_ENV): New enumeration member in uw_frtype.
+	(uw_dynamic_env): New struct.
+	(uw_block_begin, uw_block_end): Renamed some variables.
+	(uw_env_begin, uw_env_end): New macros.
+	* txr.1: Documented.
+
+2009-10-02  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Misc. bugfixes and improvements.
+
+	* extract.l (grammar): Newline in a directive
+	no longer an error. Why not allow it.
+	* extract.y (grammar): Productions for catching empty bodies in some
+	constructs now end with END newl, rather
+	than just END, so parsing can continue sanely.
+	(match_lines): In diagnostics, don't say "ignored" about material which
+	causes an error that fails the query!
+	* lib.c (mkstring): Initialize length since we know it!
+	(c_str): Take a symbol as an arg, so we don't have
+	to keep writing c_str(symbol_name(sym)).
+	(obj_print): Use isprint rather than isctrl to decide
+	whether to print a character as an escape.
+	(snarf_line): Properly handle EOF in the middle of line.
+
+2009-09-29  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 013
+
+	Some minor garbage collection issues fixed.
+
+	Infinite looping bug fixed.
+
+	New @(trailer) directive.
+
+	* extract.y (match_files): Implemented trailer directive.
+	* extract.l (version): Bump to 013.
+	* lib.h (trailer): Declaration added.
+	* lib.c (trailer): External definition added.
+	(obj_init): Initializer trailer with interned symbol.
+	* txr.1: Documented @(trailer) and bumped version to 013.
+
+2009-09-29  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Looping bug fixed. Certain directives could cause an infinite
+	loop if the query has run out of data.
+
+	* extract.y (match_files): The semantics of the first_file_parsed
+	argument changes a little bit. Previously, if nil was passed,
+	a new lazy stream would be opened for the first file.
+	But this is ambiguous because nil also means empty list;
+	sometimes when we recurse into match_files, the data has ran
+	out and this argument is thus nil. Now, that argument must be
+	the symbol t in order to mean ``open the first file''.
+	If the argument is nil, it unambiously means ``we are at the end of the
+	current file; don't open anything''.
+	(extract): The initial call to match_files now passes
+	the symbol t for the first_file_parsed argument.
+
+2009-09-29  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Fixing some gc issues. The test cases were found to bomb
+	with an assertion when run with --gc-debug enabled,
+	due to a garbage-collected object still being used.
+	This was due to the way the main function was structured.
+
+	Also, the stack ``top'' terminology in the gc was stupidly wrong. Leaf
+	function frames are at the stack top, and main is near the bottom.
+	I was thinking of the ``top caller''.
+
+	* Makefile (TXR_DBG_OPTS): New variable.
+	Tests are now run with --gc-debug, which makes them slower,
+	but has much greater chance of trapping gc problems.
+	* extract.l (main): Two variables are now used for determining the
+	stack bottom. We don't know in which order the compiler
+	places local variables into a stack frame.  (This is a separate
+	question from that of the direction of stack growth).
+	The call to the init function is now done right away.
+	The argument processing section of main does some processing
+	with GC objects, but the init function was being called afterward,
+	before the list of interned symbols is protected from garbage
+	collection! So with --gc-debug turned on, parts of the interned
+	symbol list were being garbage collected (since the variable
+	has not yet been added to the set of root pointers, which is
+	done in the init function).  Also, the use of an unknown --long-option
+	is diagnosed properly now.
+	* gc.c (gc_stack_top): Renamed to gc_stack_bottom, and converted from
+	extern to static.
+	(mark): Follows rename of gc_stack_top to gc_stack_bottom.
+	(sweep): Eliminated the freed variable for counting freed objects,
+	and the associated debug message, which was not useful.
+	Commented why the free list is managed differently when dbg
+	is turned on.
+	(gc_init): New function.
+	* gc.h (gc_stack_top): Declaration removed.
+	(gc_init): Declaration added.
+	* lib.c (min): New macro.
+	(init): Takes two additional arguments which are used to
+	determine the stack bottom. The function first determiens
+	whether the stack grows up or down. Then it takes the
+	greater or smaller of the two potential stack top pointers,
+	based on that. The result is passed go gc_init.
+	* lib.h (init): Declaration updated.
+
+2009-09-28  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 012
+
+	Semantics change of @(until) in @(collect) and @(coll).
+
+	Minor fixes.
+
+	* extract.y (match_line, match_files): The until clauses
+	continue to be processed after the main clauses of the collect
+	or coll (to see the bindings), but are processed before
+	the collection occurs, so that the until will veto
+	the bindings of the last iteration.  Moreover, the data
+	positions stays where it is when this happens, and no
+	arrangement is made to match the until material again.
+
+	* txr.1: Tried to document the change.
+
+
+2009-09-27  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* txr.1: following proofread, fixed various escaping problems and
+	instances of missing text.
+
+2009-09-26  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* lib.c (equal): Bugfixes: wrong fallthrough of FUN case.
+	VEC case must return nil, not break.
+
+2009-09-26  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Preparation for some sorting support.
+
+	* extract.y (merge): Renamed to weird_merge.
+	(map_leaf_lists): New functino.
+	(match_file): Follow weird_merge rename.
+	* lib.c (all_satisfy, none_satisfy, string_lt, do_bind2other,
+	bind2other, merge, do_sort, sort): New functions.
+	* lib.h (all_satsify, none_satisfy, string_lt,
+	bind2other, sort): Declared.
+
+2009-09-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 011
+
+	New @(maybe) clause optionally matches (does not fail if none of
+	its clauses match anything).
+
+	New blocks feature: allows a query or subquery to be
+	abruptly terminated by invoking an exit to a named or anonymous
+	block. @(collect) and @(skip) have implicit anonymous blocks now.
+
+	The @(skip) directive takes a numeric argument now, which limits
+	how many lines are searched.
+
+	* Makefile, extract.l, extract.y, extract.h, gc.c, gc.h, lib.c, lib.h,
+	regex.c, regex.h, txr.1, unwind.c, unwind.h: Copyright notice and
+	license text updated or added, and version bumped up to 011.
+	* tests/001/query-1.txr, tests/001/query-2.txr, tests/001/query-3.txr,
+	tests/002/query-1.txr: Assigned to public domain.
+
+2009-09-25  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New features:
+	- named blocks;
+	- maybe clause;
+	- optional iteration bound on skip.
+
+	* extract.y: includes added: "unwind.h", <setjmp.h>.
+	(MAYBE, OR): New grammar tokens.
+	(maybe_clause): New nonterminal grammar symbol.
+	(expr): A NUMBER can be an expression now, so that @(skip 42)
+	is valid syntax.
+	(match_files): Support for numeric argument in skip directive
+	to bound the search to a maximum number of lines.
+	Anonymous block established around skip.
+	New directives implemented: maybe, block, accept and fail.
+	Anonymous block established around collect.
+	* txr.1: Documentation updated with new features.
+	* Makefile: new object file unwind.o, and associated rules.
+	* extract.l (yybadtoken): New cases for MAYBE and OR.
+	(grammar): Likewise.
+	* lib.c (block, fail, accept): New symbol variables.
+	(obj_init): New symbols interned.
+	* lib.h (block, fail, accept): Declared.
+	(if2, if3): Macros fixed so test expression is not compared to nil,
+	but implicitly tested as boolean.
+	* unwind.c, unwind.h: New source files.
+
+2009-09-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Stability fixes.
+
+	* extract.y (match_files): Fixed invalid string("-") to
+	string(chk_strdup("-")) which caused a freeing of
+	a non-malloced string at gc finalization time.
+	* regex.c (nfa_state_shallow_free): New function: does not
+	free satellite objects, just the structure itself.
+	(nfa_combine): Use nfa_state_shallow_free instead of nfa_state_free,
+	because the merged state inherits ownership of objects from the state
+	being spliced out.
+	(nfa_state_set): Fix lack of initialization of s.visited member of the
+	state structure.
+
+2009-09-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 010
+
+	A file specs can start with $, which means read a directory.
+
+	Data sources are not into memory at once, but on demand,
+	which can reduce memory for many queries.
+
+	Regular expressions are now compiled once, when the
+	query is parsed.
+
+	Character escapes are now supported in regular expressions,
+	and as a special syntax.
+
+	* extract.l (version): Bumped to 010.
+	(grammar): 8 and 9 are not octal digits; handle all regex
+	backslash escaping in lexical grammar.
+	* extract.y (grammar): Get rid of backslash handling from
+	regex grammar. Lexer returns a REGCHAR for every escaped
+	item. In situations where an operator character is implicily
+	literal, like * in a character class, we use the grammar
+	to include that alongside REGCHAR. Bugfixes: the character ], when not
+	closing a class, is not a syntax error but stands for itself;
+	the character - stands for itself outside of character class;
+	the | character is literal in a character class.
+	* txr.1: Updated version. Documented character escapes.
+
+2009-09-24  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Lazy stream list improvement: no extra NIL element caused
+	by end-of-file. Requires push-back support in streams.
+	To avoid introducing a new structure member into streams,
+	we extend the semantics of the label member, and rename
+	it to label_pushback.
+
+	* lib.c (stdio_line_stream, pipe_line_stream,
+	dirent_stream): Follow rename of struct stream member;
+	assert that label is an atom.
+	(stream_get): Check pushback stack first and get item from there.
+	(stream_pushback): New function.
+	(lazy_stream_func): Pull one more item from the stream and
+	use /that/ to decide whether to continue the lazy stream.
+	The extra item is pushed back, if valid.
+	(lazy_stream_cons): Simplified: no hack involving regular cons. Starts
+	the induction by peeking into the stream. If something is there, it is
+	pushed back, and a lazy cons is constructed which will fetch it.
+	(obj_print): Made aware of the pushback, which must be skipped
+	to get to the terminating label.
+	* lib.h (struct stream): Member renamed from label to label_pushback.
+	(stream_pushback): New function declaration.
+
+2009-09-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Escape syntax in regexes, and text. The
+	standard seven character escapes are supported,
+	namely \a, \b, \t, \n, \v, \f, and \r,
+	as well as hex and octal escapes, plus
+	the code \e for ASCII ESC.
+
+	* extract.l (char_esc, num_esc): New functions.
+	(grammar): New lex cases.
+	* lib.c (obj_print): Support all character escapes in printing.
+	Bugfix: backslash printed as two backslashes, not one.
+
+2009-09-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* tests/002/query-1.txr: Modified to use $ to scan thread
+	subdirectories.
+	* tests/002/query-1.expected: Updated.
+
+2009-09-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New COBJ type for wrapping arbitrary C objects into the
+	Lisp-like framework. Compiled regexes are objects now.
+	Regexes in a query are now compiled just once.
+
+	* extract.y (grammar): Regexes compiled while parsing.
+	(match_line): Modify with respect to the abstract syntax
+	tree change, and the interface changes in the match_regex,
+	and search_regex functions.
+	* gc.c (mark_obj, finalize): Handle marking and finalization
+	of COBJ objects.
+	* lib.c (typeof, equal, obj_print): Handle COBJ.
+	(cobj, cobj_print_op): New functions.
+	* lib.h (type_t): New enum element, COBJ.
+	(struct cobj, struct subj_ops): New types.
+	(union obj): New member, co.
+	(cobj, cobj_print_op): New functions declared.
+	* regex.c (regex_equal, regex_destroy, regex_compile, regex_nfa): New
+	functions.
+	(regex_obj_ops): New static struct.
+	(search_regex, match_regex): Interface change. Regex arguments
+	are now compiled regexes. Functions won't handle raw regexes.
+	* regex.h (regex_compile, regex_nfa): New functions declared.
+
+2009-09-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	New feature: file specs that start with $ read directories.
+	Reading from an ``ls'' pipe is too slow.
+
+	Streams and lazy conses implemented. Lazy conses allow us to treat a
+	file or other kind of stream exactly as if it were a list.
+	We can use car and cdr, etc. But only the parts of the list
+	that we actually touch are instantiated on-the-fly by
+	reading from the underlying stream.
+
+	* extract.l: inclusion of <dirent.h> added.
+	* extract.l: inclusion of <dirent.h> added.
+	* extract.y (fpip_closedir): new enumeration in struct fpip,
+	and fpip_noclose removed.
+	(complex_open): Check for leading $, use opendir.
+	(complex_open_failed): New function.
+	(complex_close): Handle fpip_closedir case. Not closing
+	stdin and stdout is handled by explicit comparison now.
+	(complex_snarf): New function, constructs stream of
+	a suitable type, over object returned from complex_close,
+	wraps it in a lazy list.
+	(match_files): Use complex_snarf instead of snarf to get a lazy list.
+	* gc.c: Handle LCONS and STREAM cases.
+	* lib.c (stream_t, lcons_t): New variables holding symbols.
+	(typeof, equal, obj_print): Handle LCONS and STREAM.
+	(car, cdr, car_l, cdr_l, consp, atom, listp): Rewritten to handle
+	LCONS.
+	(chk_strdup, stdio_line_read, stdio_line_write, stdio_close
+	stdio_line_stream, pipe_close, pipe_line_stream,
+	dirent_read, dirent_close, dirent_stream,
+	stream_get, stream_put, stream_close,
+	make_lazycons, lazy_stream_func, lazy_stream_cons): New functions.
+	(stdio_line_stream_ops, pipe_line_stream_ops,
+	dirent_stream_ops): New static structs.
+	(obj_init): Intern new symbols lstream, lcons, and dir.
+	* lib.h (type_t): New enum members STREAM and LCONS.
+	(struct stream, struct stream_ops, struct lazy_cons): New types.
+	(union obj): New members sm and lc.
+	(chk_strdup, stdio_line_stream, pipe_line_stream,
+	dirent_stream, stream_get, stream_put, stream_close,
+	lazy_stream_cons): New function declarations.
+	* regex.c: inclusion of <dirent.h> added
+
+2009-09-23  Kaz Kylheku  <kkylheku@gmail.com>
+
+	Version 009
+
+	User-friendly error messages from parser.
+	Fixed -q option.
+
+	* extract.l (version): Bumped to 009.
+	* txr.1: Updated version.
+
+2009-09-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* Makefile (LIBLEX): New variable.
+	Refer to lex library as -lfl, using variable
+	that can be overridden.
+
+2009-09-22  Kaz Kylheku  <kkylheku@gmail.com>
+
+	* extract.h (yybadtoken): New function declaration.
+	* extract.l (yybadtoken): New function.
+	(main): Fixed -q option.
+	* extract.y (grammar): Lots of new error productions, some
+	phrase rules refactored, resulting in much more user-friendly
+	error diagnosis.
+	* txr.1: -q option semantics clarified.