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* Version 125.txr-125Kaz Kylheku2015-11-206-382/+436
| | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated.
* Combat spurious retention in few more functions.Kaz Kylheku2015-11-201-13/+17
| | | | | | | * lib.c (sub_list, replace_list): Use original list variable instead of copying it to iter. Use gc_hint on list so that the old value doesn't hang around on the stack, while a register copy marches through the list.
* last function becomes generic.Kaz Kylheku2015-11-202-6/+17
| | | | | | * lib.c (last): Handle non-list sequences via sub function. * txr.1: Updated description of last.
* TXR_COMPAT option.Kaz Kylheku2015-11-202-1/+54
| | | | | | | | | * txr.c (txr_main): Implement handling of TXR_COMPAT environment variable. Also, before entering interactive mode, if compatibility has been set via TXR_COMPAT, emit an informative message about this. * txr.1: Documented TXR_COMPAT.
* New equality substitution.Kaz Kylheku2015-11-206-34/+189
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the equal method is defined for structs, its return value is used in their place for hashing and comparison. * eval.h (eq_s, eql_s, equal_s): Declared. * hash.c (equal_hash): If a COBJ defines an equalsub function, we call it. If it returns non-nil, we take the object in its place and recurse. * lib.c (equal): Refactored to support equality substitution. (less): Support equality substitution. * lib.h (cobj_ops): New function pointer member, equalsub. Only struct instances define this, currently. (cobj_ops_init): Add null entry to initializer for equalsub. (cobj_ops_init_ex): New initialiation macro for situations when the equalsub member must be provided. * struct.c (struct struct_type): new member eqmslot. (make_struct_type): Initialize emslot to zero. (static_slot_set, static_slot_ensure): If eqmslot is -1, indicating positive knowledge that there is no equal method static slot, we must invalidate that with a zero: it is no longer known whether there is or isn't such a slot. (get_equal_method, struct_inst_equalsub): New static functions. (struct_inst_ops): Initialize the equalsub member using new cobj_ops_init_ex macro. * txr.1: Document equality substitution.
* Fix buggy less function.Kaz Kylheku2015-11-201-32/+38
| | | | | | | | | | | | | | | | | | | Allowing rankings among types which documentation says are not comparable. * lib.c (enum less_handling): New enum. (less_tab): Elements are values of the less_handling enum. (less_tab_init): Entries are renumbered. Everything that was given precedence 5 or higher is now zero: not comparable. Precedences 0 to 4 remap to 1 to 5. less_tab is populated differently, since there are four values now. If either the left or right type has 0 precedence, the value is less_cannot: comparison is not possible. (less): Only a less_tab value of less_compare now passes control through to the switch statement. The less_cannot value shortcuts to a cannot compare error. Types that cannot occur in the switch now are removed, and a default case goes to internal error.
* Fix type hole in equal function w.r.t. COBJ.Kaz Kylheku2015-11-201-1/+1
| | | | | | | | * lib.c (equal): We cannot pass both arguments to the left object's equal function just because both arguments are COBJ. We must make sure they are using the same operations. The equal functions blindly assume that both arguments are objects of the same type, and cast the pointers.
* Introducing lazy structs.Kaz Kylheku2015-11-204-3/+182
| | | | | | | | | | | | | | | | | | | | | | | * share/txr/stdlib/struct.tl (lnew): New macro. * struct.c (struct_type): Turn id into a bitfield one bit smaller than cnum. New Boolean bitfield lazy. (struct_init): Register make-lazy-struct intrinsic. (make_struct): Initialize lazy bitfield to zero. (lazy_struct_init, check_init_lazy_struct): New static functions. (make_lazy_struct): New function. (copy_struct, clear_struct, replace_struct, reset_struct, lookup_slot, struct_inst_equal, struct_inst_hash): Call check_init_lazy_struct on all structures involved. (lookup_slot): Call check_init_lazy_struct. (struct_inst_mark): If the struct is lazy, it has one instance slot which must be marked, holding the argfun function passed into make_lazy_struct. * struct.h (make_lazy_struct): Declared. * txr.1: Documented lnew and make-lazy-struct.
* @(next) takes Lisp expression as source now.Kaz Kylheku2015-11-202-3/+36
| | | | | | | | | | | * match.c (v_next): Evaluate the source expression as TXR Lisp, unless it is meta-expression or meta-variable, or the compatibility option is set to 124 or lower. In those cases treat it as an expression of the TXR Pattern * txr.1: Updated documentation of @(next) and all relevant examples of @(next) everywhere. Added compatibility notes.
* Renaming html filters to get rid of underscore.Kaz Kylheku2015-11-202-27/+31
| | | | | | | | | | | | | | | | | * filter.c (to_html_k, from_html_k, to_html_relaxed_k): Variables removed. (tohtml_k, tohtml_star_k, fromhtml_k): New keyword symbol variables. (to_html_table): Array renamed to tohtml_table. (to_html_relaxed_table): Renamed to tohtml_star_table. (from_html_table): Renamed to fromhtml_table. (html_encode): Refers to tohtml_k. (html_encode_star): Refers to tohtml_star_k. (html_decode): Refers to fromhtml_k. (filter_init): Initialize new symbol variables. Remove old registrations. Register filters under old names too. * txr.1: Document new names.
* New :to_html_relaxed filter and html-encode*.Kaz Kylheku2015-11-202-1/+36
| | | | | | | | | | | * filter.c (to_html_relaxed_k): New keyword symbol variable. (to_html_relaxed_table): New static array. (html_encode_star): New static function. (filter_init): Initialize new symbol variable. Register new filter. Register html-encode* function. * txr.1: Documented :to_html_relaxed filter and html-encode* function.
* Filtering to HTML should include ' -> '.Kaz Kylheku2015-11-201-0/+1
| | | | * filter.c (to_html_table): Add entry for apostrophe.
* @(rep) as shorthand for @(coll :vars nil).Kaz Kylheku2015-11-203-5/+41
| | | | | | | | | | | | | * match.c (h_coll): Check for rep symbol, and handle similarly to v_coll. Use symbol in error message. (dir_tables_init): Bind rep symbol to h_coll. * parser.y (elems): Don't generate rep_elem phrase structure for the sake of catching "rep outside of output"; this production now conflicts with the intent to allow this. (elem): Add various REP productions which clones of COLL. * txr.1: Documented new @(rep) usage.
* Use symbol in diagnostics in collect.Kaz Kylheku2015-11-201-9/+9
| | | | | * match.c (v_collect): Don't use hard-coded "collect" in diagnostics because the symbol can be repeat.
* Address spurious retention across library.Kaz Kylheku2015-11-201-17/+95
| | | | | | | | | | | * lib.c (lazy_conses, term, nthcdr, memq, memql, memqual, member, member_if, remq, remql, remqual, remove_if, keep_if, countqual, countql, countq, count_if, some_satisfy, all_satisfy, none_satisfy, proper_listp, length_list, getplist, do_and, do_or, mappend, find, find_if, posqual, posql, posq, pos, pos_if): Use gc_hint on list parameter. (find_max, pos_max, in, search_list, where): Restructure so that list parameter is used as iterator. Use gc_hint on it.
* Combat spurious retention in args handling code.Kaz Kylheku2015-11-202-3/+6
| | | | | | | | | * args.c (args_normalize): Zap the argument in the array when moving it over to the list. * args.h (args_atz): When zapping the argument in the list, zap the actual car field, rather than the list itself. It seems there is a copy of the list somewhere, so zapping it is not effective.
* Combat spurious retention in mapdo.Kaz Kylheku2015-11-201-0/+2
| | | | | | * lib.c (mapdo): gc_hint the list variable so that the list march isn't entirely optimized into a register, leaving a pointer to the top of the list on the stack.
* Useful debugging function for spurious retention.Kaz Kylheku2015-11-202-0/+13
| | | | | | * gc.c (gc_report_copies): New function * gc.h (gc_report_copies): Declared.
* Provide butlast function.Kaz Kylheku2015-11-204-0/+31
| | | | | | | | | | * eval.c (eval_init): Registered butlast intrinsic. * lib.c (butlast): New function. * lib.h (butlast): Declared. * txr.1: Documented butlast.
* Functors: structs callable as functions.Kaz Kylheku2015-11-202-0/+33
| | | | | | | * lib.c (generic_funcall): If an object is used as a function, get its lambda method and call that. * txr.1: Document functors.
* New uslot function and usl macro.Kaz Kylheku2015-11-205-1/+75
| | | | | | | | | | | | | | * struct.c (struct_init): Register uslot intrinsic function. (uslot_fun): New static function. (uslot): New function. * struct.h (uslot): Declared. * share/txr/stdlib/struct.tl (usl): New macro. * lisplib.c (struct_set_entries): Add usl macro. * txr.1: Documented uslot and usl.
* Bugfix: missing macros in autoload.Kaz Kylheku2015-11-141-1/+2
| | | | | * lisplib.c (struct_set_entries): Bugfix: missing meth, umeth and defmeth.
* Version 124.txr-124Kaz Kylheku2015-11-146-526/+569
| | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated.
* Bugfix: broken ~o specifier for bignums.Kaz Kylheku2015-11-141-1/+1
| | | | | | * stream.c (formatv): The commit in which I added the ~b specifier broke bignum octal printing due to an incredibly silly typo.
* Implementing *print-base* and ~d format directive.Kaz Kylheku2015-11-148-92/+173
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * debug.c (show_bindings): Use ~d for level, so as not to be influenced by *print-base*. (debug): Use ~d for line numbers. * lib.c (gensym): Use ~d conversion specifier for formatting gensym counter into symbol name. * match.c (LOG_MISMATCH, LOG_MATCH): Use ~d for line number references. (h_skip, h_coll, h_fun, h_chr, match_line_completely, v_skip, v_fuzz, v_gather, v_collect, v_output, v_filter, v_fun, v_assert, v_load, v_line, h_assert, open_data_source): Use ~d for line refs, number of iterations, errno values. * parser.c (repl): Use ~d for prompt line numbers, numbered variables and the expr-<n> string in error messages. * parser.l (yyerrorf, source_loc_str): Use ~d for line numbers. * stream.c (print_base_s): New symbol variable. (formatv): Implement *print-base*. (stdio_maybe_read_error, stdio_maybe_error, stdio_close, pipe_close, open_directory, open_file, open_fileno, open_tail, open_process, run, remove_path): Use ~d for errno values. (stream_init): Initialize print_base_s and register *print-base* special variable. sysif.c (mkdir_wrap, ensure_dir, getcwd_wrap, mknod_wrap, chmod_wrap, symlink_wrap, link_wrap, readlink_wrap, excec_wrap, stat_impl, pipe_wrap, poll_wrap, getgroups_wrap, setuid_wrap, seteuid_wrap, setgid_wrap): Use ~d for errno values and system function results. * txr.1: Documented *print-base* and ~d conversion specifier.
* New global control over float print precision.Kaz Kylheku2015-11-134-8/+99
| | | | | | | | | | | | | | | | | | * configure (have_dbl_decimal_dig): New variable. New configure test to test for DBL_DECIMAL_DIG or __DBL_DECIMAL_DIG__, resulting in FLO_MAX_DIG macro being deposited in config.h. * arith.c (arith_init): Register flo-max-dig variable. * stream.c (print_flo_precision_s): New symbol variable. (formatv): Obtain default precision from *print-flo-precision* special variable, rather than hard coded DBL_DIG. (stream_init): Initialize print_flo_precision_s variable, and register *print-flo-precision* special. * txr.1: Document flo-max-dig, *print-flo-precision*, and change of behavior in format.
* Formatting in generate, giterate heading.Kaz Kylheku2015-11-121-1/+1
| | | | * txr.1: Missing @, added for comma.
* Explanation about mlet circularity.Kaz Kylheku2015-11-121-1/+4
| | | | | * txr.1: mlet circular references are detected at evaluation time, not by the macro.
* Fix pretty printer mishandling unexpected syntax.Kaz Kylheku2015-11-111-7/+8
| | | | | | | | | * lib.c (obj_print_impl): When rendering quote, quasiquote, unquote, splice, vector literals, and meta-vars/meta-numbers into their read syntax, we must ensure that these forms have the correct abstract syntax. If not, we must print these as ordinary compound expressions. Otherwise we throw errors, or don't print the complete object.
* Consistent parameter name in list_collect_* decls.Kaz Kylheku2015-11-111-5/+5
| | | | | | | * lib.h (list_collect, list_collect_nconc, list_collect_append, list_collect_nreconc, list_collect_revappend): Rename pptail parameter to ptail, like in the lib.c definitions of these.
* Adding revappend and nreconc.Kaz Kylheku2015-11-114-0/+143
| | | | | | | | | | | | | | | * eval.c (eval_init): Register revappend and nreconc intrinsics. * lib.c (list_collect_nreconc): New function. (revlist): New static function. (list_collect_revappend): New function. (revappend, nreconc): New functions. * lib.h (revappend, nreconc): Declared. (list_collect_nreconc, list_collect_revappend): Declared. * txr.1: Documented revappend and nreconc.
* Improve reverse and nreverse.Kaz Kylheku2015-11-111-16/+68
| | | | | | | | * lib.c (nreverse): Handle strings and vectors individually, and do strings and vectors in-place. (reverse): Handle strings and vectors individually, by duplicating and then in place. Handle lazy strings by forcing, then reversing a copy.
* Print (rcons x y) forms as x..y.Kaz Kylheku2015-11-101-0/+6
| | | | | * lib.c (obj_print_impl): Handle rcons in same place as other special syntax like sys:expr and quote.
* New function: group-reduce.Kaz Kylheku2015-11-104-0/+120
| | | | | | | | | | * eval.c (eval_init): Register group-reduce intrinsic. * hash.c (group_reduce): New function. * hash.h (group_reduce): Declared. * txr.1: Documented group-reduce.
* Add func_n6o.Kaz Kylheku2015-11-102-0/+7
| | | | | | * lib.c (func_n6o): New function. * lib.h (func_n6o): Declared.
* New block* op; functions return* and sys:abscond*.Kaz Kylheku2015-11-092-4/+127
| | | | | | | | | | | | * eval.c (block_star_s): New symbol variable. (op_block_star): New static function. (do_expand): Handle block* symbol. (return_star, abscond_star): New static functions. (eval_init): Initialize block_star_s variable. Register block* operator and return* and sys:abscond* functions. * txr.1: Documented new operator and functions.
* Variable init forms of for go inside nil block.Kaz Kylheku2015-11-082-9/+21
| | | | | | | | * eval.c (op_for): Establish the block before doing any evaluation, subject to the compatibility option. * txr.1: Updated documentation for for, exchanging steps 1 and 2. Added compatibility notes.
* quicksort: tail recurse on longer partition.Kaz Kylheku2015-11-081-3/+8
| | | | | | * lib.c (quicksort): Sort the shorter partition with real recursion, then tail recurse with explicit goto to sort the longer partition.
* Median of three pivot selection in quicksort.Kaz Kylheku2015-11-081-3/+49
| | | | | | * lib.c (med_of_three, middle_pivot): New static functions. (quicksort): Use med_of_three to choose a pivot above a threshold array size, otherwise just the middle element.
* New iread function.Kaz Kylheku2015-11-076-10/+120
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The read function no longer works like it used to on an interactive terminal because of the support for .. and . syntax on a top-level expression. The iread function is provided which uses a modified syntax that doesn't support these operators on a top-level expression. The parser thus doesn't look one token ahead, and so iread can return immediately. * eval.c (eval_init): Register iread intrinsic function. * parser.c (prime_parser): Only push back the recently seen token when priming for a regular Lisp read. Handle the prime_interactive method by preparing a SECRET_ESCAPE_I token. (lisp_parse_impl): New static function, formed from previous lisp_parse. Takes a boolean argument indicating interactive mode. (prime_parser_post): New function. (lisp_parse): Now a wrapper for lisp_parse_impl which passes a nil to indicate noninteractive read. (iread): New function. * parser.h (enum prime_parser): New member, prime_interactive. (scrub_scanner, iread, prime_parser_post): Declared. * parser.l (prime_scanner): Handle the prime_interactive case the same way as prime_lisp. (scrub_scanner): New function. * parser.y (SECRET_ESCAPE_I): New token type. (i_expr): New nonterminal symbol. Like n_expr, but doesn't support dot or dotdot operators, except in nested subexpressions. (spec): Handle SECRET_ESCAPE_I by way of i_expr. (sym_helper): Before freeing the token lexeme, call scrub_scanner. If the token is registered as the scanner's most recently seen token, the scanner must forget that registration, because it is no longer valid. (parse): Call prime_parser_post. * txr.1: Documented iread.
* Version 123.txr-123Kaz Kylheku2015-11-064-4/+15
| | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise.
* Remove unused rel1 function.Kaz Kylheku2015-11-062-8/+0
| | | | | | * gc.c (rel1): Removed. * gc.h (rel1): Declaration removed.
* Fix serious regression in search_regex.Kaz Kylheku2015-11-061-3/+1
| | | | | | | | * regex.c (search_regex): In the Sep 7 2015 commit titled "Don't use prot1 for temporary gc protection", a rel1 call was left behind, causing an assert whenever the function is used for a succesful "from end" search.
* Version 122.txr-122Kaz Kylheku2015-11-056-338/+371
| | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated.
* Make small_sigset_t narrower.Kaz Kylheku2015-11-052-2/+2
| | | | | | | | | On 64 bit Darwin, sigset_t is 32 bits, sso our small_sigset_t is actually larger. Let's use unsigned int. * signal.h (small_sigset_t): Use unsignd int for set member. * signal.c (small_sigfillset): Change cast to unsigned int.
* Clear stack area below revived continuation.Kaz Kylheku2015-11-051-0/+1
| | | | | | | | | | | * unwind.c (revive_cont): Don't just reserve frame_slack bytes below the continuation for any stack frame, but clear the bytes to zero. On Cygwin, this fixes a failing continuation test case. The issue is that the cont_obj variable in capture_cont lands into this area (implying it is not captured). When the continuation is revived, the variable has a garbage value, rather than nil, as expected.
* Copy envs for middle-of-binding continuations.Kaz Kylheku2015-11-054-16/+108
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When continuations are captured/restored in the middle of variable binding constructs, a hidden problem occurs. Binding constructs work by allocating an empty environment and then destructively extending it. Since the environment is not on the stack, but a referenced object, it doesn't get deep copied into a continuation. As the continuation is revived repeatedly, parts of the variable binding code are repeatedly re-executed, and keep pushing fresh bindings into the same environment object. Though the new bindings correctly shadow the old, the old bindings are there and potentially hang on to garbage. The solution taken here is to introduce a new kind of frame for handling the situation: a continuation copy handling frame. This frame allows functions to register objects to be copied more deeply if a continuation is captured/revived across them. * eval.c (copy_env): New static function. (copy_env_handler): New static function. (bind_args, bind_macro_params): Install continuation copy handling frame for cloning new_env. (struct bindings_helper_vars): New struct type. (copy_bh_env_handler): New static function. (bindings_helper): Install continuation copy handling frame for de and ne variables which hold environments. The variables are moved to a struct to facilitate access from the handler. * eval.h (copy_env): Declared. * unwind.c (uw_push_cont_copy): New function. (call_copy_handler): New static function. (revive_cont): When a continuation is being revived invoke the copying actions in its continuation copy handling frames, but not if it is only being temporarily revived for immediate unwinding. (capture_cont): After copying the continuation, invoke any continuation copying frames in the "parent": the original frames that were captured. * unwind.h (enum uw_frtype): New type, UW_CONT_COPY. (struct uw_cont_copy): New struct type. (union uw_frame): New member cp. (uw_push_cont_copy): Declared.
* yield-from can omit form; access initial value.Kaz Kylheku2015-11-042-72/+122
| | | | | | | | | | | | | * share/txr/stdlib/yield.tl (sys:rcv-item): New struct type. (sys:obtain-impl): Handle rcv-item, produced by a no-argument yield-from, which requests an immediate resumption with the previously given resume value. The reply value is renamed the resume value. (yield-from, yield): Form argument is optional. * txr.1: Rewrote obtain and yield documentation with lesser focus on implementation and greater focus on abstract semantics.
* Pattern vars accessed from Lisp now dynamic.Kaz Kylheku2015-11-044-5/+73
| | | | | | | | | | | | | | | * eval.c (set_dyn_env): Static function becomes external. * eval.h (set_dyn_env): Declared. * match.c (eval_with_bindings, eval_progn_with_bindings): Evaluate Lisp code in null lexical environment. Instead install the pattern variables as dynamic, so they shadow global variables. A compatibility check for 121 or earlier provides the old behavior. * txr.1: Document scoping rules, and added compatibility notes.
* Factor out excessive uw_set_match_context calls.Kaz Kylheku2015-11-031-51/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | We only need to stash the TXR matcher's context in an environment frame when there is the possibility that Lisp code may be called, or filters which re-enter the matcher directly or through Lisp code. * match.c (eval_with_bindings, eval_progn_with_bindings): New static functions. (dest_bind): Use eval_with_bindings instead of five lines of boilerplate code. (h_chr): No need to stash context around dest_bind; lower levels take care of it. (subst_vars): Do set up match context around the body of this function, for the sake of Lisp calls and filtering in format_field. Use eval_with_bindings. (do_txeval): Remove match context environment frame setup around subst_vars. Use eval_with_bindings, too. (do_output_line): Use eval_with_bindings. (v_output): No match context environment frame around do_output. (v_do, v_require): Use eval_progn_with_bindings instead of five line boilerplate. (v_line): No match context frame around dest_bind. (h_do): Use eval_progn_with_bindings.
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