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* place macros: adjustment to expansion strategy.Kaz Kylheku2019-06-052-25/+37
| | | | | | | | | | * share/txr/stdlib/place.tl (sys:pl-expand): At each expansion round, repeatedly expand the form as a place macro until that can no longer be done and only then try macroexpand-1, instead of just trying one place macro expansion. * txr.1: Updated and revised description of expansion under define-place-macro.
* arith: INT_PTR_MIN overflow bugfix.Kaz Kylheku2019-06-031-1/+1
| | | | | * arith.c (int_flo): Don't subtract one from INT_PTR_MIN any more, since it is now the most negative integer already.
* bugfix: list length: off-by-one error huge lists.Kaz Kylheku2019-05-311-0/+2
| | | | | | | | | | | | * lib.c (length_list, length_proper_list): Fix off-by-one bug when calculating lengths of lists that overflow the cnum type. Note that we will never see regular lists which hit this situation, because there are more values in the range [0, INT_PTR_MAX] then there are possible pointers in the system, However, lazy lists can be that long or longer, because as we calculate the length of a lazy list, the part we have already traversed can be garbage-collected under the right circumstances.
* posix: add close function.Kaz Kylheku2019-05-302-0/+39
| | | | | | | * sysif.c (close_wrap): New static function. (sysif_init): close intrinsic registered. * txr.1: Documented.
* doc: missing word under mask.Kaz Kylheku2019-05-291-1/+1
| | | | * txr.1: add missing "or" to make "bitwise or".
* doc: typo under ldiff.Kaz Kylheku2019-05-291-1/+1
| | | | * txr.1: Misplaced comma nudged left.
* doc: formatting of sident charsKaz Kylheku2019-05-291-3/+3
| | | | * txr: use .verb block instead of .mono block.
* path-private-to-me-p: bugfix: not including superuser.Kaz Kylheku2019-05-292-22/+41
| | | | | | | | | | | | * share/txr/stdlib/path-test.tl (path-private-to-me, path-strictly-private-to-me): These functions were neglecting to trust the root user, as documented. If the file is owned by root, we treat it as if it were owned by the caller. Furthermore, if we have to process the group membership, we allow the group to contain the superuser's name. * txr.1: Documentation improved, and the treatment of groups documented.
* mpi: avoid additive inverse of most negative integer.Kaz Kylheku2019-05-251-3/+6
| | | | | | | | | * mpi.c (mp_set_int, mp_set_intptr, mp_set_double_intptr): When the signed input is negative, do not simply calculate its inverse with unary minus, because it could be the most negative value that has no additive inverse. Instead, convert to unsigned first, then apply the unary minus to the unsigned type, which calculates the two's complement.
* bugfix: c_num won't convert most negative value.Kaz Kylheku2019-05-253-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | This bug causes a problem particularly in FFI. THe conversion of an integer to the FFI int type begins by conversion via c_num to the cnum type, which is at least as wide as int. Alas, the INT_MIN value (e.g. #x-80000000 on 32 bits) will not convert! Fixing this has a ripple effect. We alter the INT_PTR_MIN constant to include this value. This causes the derived NUM_MIN to also include the extra negative value, extending the fixnum range by one value. Everything seems to be okay. * configure: Decrease value of INT_PTR_MIN and DOUBLE_INTPTR_MIN constants by one to include the most negative two's complement value. * ffi.c (make_ffi_type_enum): We must not subtract 1 from INT_PTR_MIN here any more. * mpi.c (mp_in_range): If the bignum is negative, then extend the range check by one value, so that we don't reject the most negative two's complement value.
* lib: remove unused numeric macros.Kaz Kylheku2019-05-251-2/+0
| | | | * lib.h (maxint, minint): Remove unused macros.
* nsis: fixes for file assoc module from NSIS Wiki.Kaz Kylheku2019-05-251-2/+11
| | | | * win/fassoc.nsh: Patch applied.
* windows: register file associations.Kaz Kylheku2019-05-252-0/+146
| | | | | | | | | Add registration of .txr, .tl and .tlo suffixe. * inst.nsi: Include fassoc.nsh file. Associate .txr, .tl and .tlo with txr-win.exe * win/fassoc.nsh: New file.
* placelet: add comment.Kaz Kylheku2019-05-231-1/+13
| | | | | | | * share/txr/stdlib/place.tl (sys:placelet-1): Adding comment explaining why the explicit expansion and temporary proxy place are necessary, even though in most cases it can work fine without them.
* asm: remove unused symbol macro.Kaz Kylheku2019-05-221-2/+0
| | | | | * share/txr/stdlib/asm.tl (%oc-list%): Unused global symbol macro removed.
* Version 216.txr-216Kaz Kylheku2019-05-207-1025/+1111
| | | | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated. * protsym.c: Likewise.
* doc: missing deindent under Function FiltersKaz Kylheku2019-05-201-1/+1
| | | | * txr.1: .PP added.
* compile-file: input path harmonized with load.Kaz Kylheku2019-05-202-31/+101
| | | | | | | | | | | | | | * share/txr/stdlib/compiler.tl (open-compile-streams): The input file is now determined in a manner similar to the load function. If the path is relative and there is a *load-path* binding, then it is now considered relative to *load-path*. It is considered suffixed only if ending in .tl or .txr. If unsuffixed, then it is first tried with the .tl suffix. (usr:compile-file): Bind *load-path* to the actual path used for loading the file, rather than the input path. * txr.1: Documented.
* load: always bind *load-path* to actual path.Kaz Kylheku2019-05-202-15/+28
| | | | | | | | | | | * eval.c (load): Bind *load-path* to the real path that was used to open the file, not to the tentative path to which the .tl suffix was added, subject to compatibility option. * txr.1: Documentation for load revised for better wording and to document the above change. Fixed *load-path* being wrongly called a macro, and also load being called a macro. Compat note added.
* oop: derived hook.Kaz Kylheku2019-05-153-13/+75
| | | | | | | | | | | * struct.c (derived_s): New symbol variable. (struct_init): Initialize derived_s symbol. (make_struct_type): Check for derived method in parent, and invoke. * struct.h (derived_s): Declared. * txr.1: Documented.
* oop: new new* and lnew* macros.Kaz Kylheku2019-05-153-26/+64
| | | | | | | | | | | | * lisplib.c (struct_set_entries): Add autoload entries for new* and lnew* symbols. * share/txr/stdlib/struct.tl (sys:new-type, sys:new-expander): New functions. (new, lnew): Macros now implemented using sys:new-expander. (new*, lnew*): New macros. * txr.1: Documented.
* oop: new function: struct-type-name.Kaz Kylheku2019-05-153-0/+22
| | | | | | | | | * struct.c (struct_init): Register struct-type-name intrinsic. (struct_type_name): New function. * struct.h (struct_type_name): Declared. * txr.1: Documented.
* structs: eliminate declaration of nonexistent var.Kaz Kylheku2019-05-111-1/+1
| | | | * struct.h (static_slot_s): Dangling declaration removed.
* debugger: use window-mapdo.Kaz Kylheku2019-05-031-2/+2
| | | | | | * share/txr/stdlib/debugger.tl (print-backtrace): Use the new window-mapdo instead of window-map, to avoid consing a list that is throw away.
* interpreter: small code tidying in me_interp_macro.Kaz Kylheku2019-05-021-2/+1
| | | | | | * eval.c (me_interp_macro): Combine initialization and assignment into one. There was previously code between the two that got removed when the old debugger was scrubbed.
* interpreter: don't bother with dot position.Kaz Kylheku2019-05-021-6/+1
| | | | | | * eval.c (do_eval_args): Since function call expressions all undergo the dot-to-apply transform, there is no need look for a form in the dot position.
* bugfix: apply regression.Kaz Kylheku2019-05-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | Refactorings to apply released TXR 192 broke it, causing apply to fail to treat non-list sequences as individual arguments, as documented. This affects dotted application as well. ;; wrong (list . "abc") -> "abc" ;; correct (list . "abc") -> (#\a #\b #\c) With some misgivings, I'm not making the behavior subject to the -C compat option. * eval.c (applyv): Two things are wrong here: we moved the last fixed argument into args->list without turning it into a one-element list. Secondly, we didn't pass this list through apply_intrinsic_frob_args. We can combine both actions into just calling tolist, which is what apply_intrinsic_frob_args will do with the car of a one-element list.
* C99: get rid of useless inline instantiations.Kaz Kylheku2019-05-024-36/+0
| | | | | | | | | | | * hash.c, lib.c, parser.y, unwind.c: Remove useless declarations that were believed to be C99 inline instantiations. This was mistakenly added at the time the Solaris issue was discovered that _XOPEN_SOURCE values of 600 or greater require compiling in C99 mode. We use "static inline" under C99 for inline functions; instantiation is not applicable at all to inline functions that don't have external linkage.
* loading: try unsuffixed files directly last.Kaz Kylheku2019-05-012-96/+145
| | | | | | | | | | | | | | | | | | | | | | | | | In this patch we change the strategy for resolving unsuffixed paths in load and @(load). In load, an unsuffixed name is tried with a .tlo suffix, then .tl and only if those don't resolve to a file it is tried as-is. The previous order is as-is, .tlo, .tl. Similarly in @(load), but unsuffixed paths are tried as .txr, then .tlo, then .tl. The motivation for this is to avoid probing the filesystem multiple times the optimized case that we care about: loading .tlo files from Lisp. * parser.c (open_txr_file): Rearrange the probing strategy. Also recognize .txr_profile as a suffix, treating it like .tl. This is so that we don't probe for .txr_profile.tlo and .txr_profile.tl before finding the profile. (load_rcfile): Take advantage of the new path-not-found exception. We avoid wastefully checking with path-exists-p to avoid calling open_txr_file. We just let open_txr_file throw an exception if the file doesn't exist, and then distinguish the non-existence case in the handler. * txr.1: Updated @(load) and load documentation.
* lib: more nuanced file access errors.Kaz Kylheku2019-05-019-66/+144
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several new more specific exception types are derived from file-error and used. Error handlers can distinguish unexpected non-existence, unexpected existence and permission errors from each other and other errors. * lib.c (path_not_found_s, path_exists_s, path_permission_s): New symbol variables. (obj_init): New variables initialized. * lib.h (path_not_found_s, path_exists_s, path_permission_s): Declared. * parser.c (open_txr_file): Use new errno_to_file_error function to convert errno to exception symbol. * socket.c (open_sockfd): Likewise. * stream.c (open_directory, open_file, open_fileno, open_command, open_process, run, remove_path, rename_path): Likewise, and process-error is used in open_process and run instead of file-error for problems related to creating the process. * sysif.c (errno_to_file_error): New function. (mkdir_wrap, ensure_dir, chdir_wrap, getcwd_wrap, mknod_wrap, chmod_wrap, symlink_wrap, link_wrap, readlink_wrap, stat_impl, umask_wrap, ): Use errno_to_file_error to convert errno to exception symbol. (exec_wrap): Use process-error instead of file-error. * sysif.c (errno_to_file_error): Declared. * unwind.c (uw_init): Register path-not-found, path-exists and path-permission as subtypes of file-error. * txr.1: Documented.
* build: allow $(pwd)/configure to work.Kaz Kylheku2019-04-292-2/+13
| | | | | | | | | | | | | | | | | | | | | When the build is being done in the source directory, allow the configure script to be executed via path names other than just ./configure, such as an absolute path. Some distros use this. * configure (build_in_srcdir): New variable. (inode): New function. Rather than checking whether "$source_dir" is ".", we test whether they are the same inode. If they are the same, we now also set the build_in_srcdir variable in addition to generating the usual warning. (gen_config_make): Propagate the build_in_srcdir into config.make. * Makefile: use the build_in_srcdir variable from config.make to determine whether we are building in the source directory, rather than relying on top_srcdir being blank.
* debugger: expand frames.Kaz Kylheku2019-04-295-37/+93
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds special unwind frames for backtracing expansions. With this, we can get rid of the global variable last_form_expanded, since to get the last form expanded, we just search for the most enclosing expand frame. * eval.c (last_form_expanded): Global variable removed. (error_trace): Use uw_last_form_expanded() instead of last_form_expanded. (expand_eval): No need to save and restore last_form_expanded any more. (expand_lisp_setq, expand_setqf, expand_lisp1, do_expand): Use uw_last_form_expanded(). (expand, do_macroexpand_1): Push and pop expand frame. This fixes a bug: do_macroexpand_1 was not recording last_form_expanded. Evaluation of top-level forms uses explicit macroexpansion, therefore top-level evaluation was neglecting to set last_form_expanded. This explains weird behavior I saw in the listener from time to time, when errors would report against the expansion of the wrong form. (eval_init): Remove reference to last_form_expanded variable. * eval.h (last_form_expanded): Declaration removed. * share/txr/stdlib/debug.tl (expand-frame print-trace, expand-frame loc): New methods. (print-backtrace): Include uw-expand frames in the backtrace. * unwind.c (expand_frame_type): New static variable. (uw_find_frames_by_mask): Handle UW_EXPAND. (uw_last_form_expanded, uw_push_expand): New functions. (uw_late_init): Register expand-frame struct type. * unwind.h (enum uw_frtype): New enum member, UW_EXPAND. (uw_last_form_expanded, uw_push_expand): Declared.
* backtrace: check next frame for nil.Kaz Kylheku2019-04-291-1/+1
| | | | | * share/txr/stdlib/debug.tl (fcall-frame print-trace): Don't invoke .(loc) method on nx-fr, if it is nil.
* debugger: move uw-* symbols into sys package.Kaz Kylheku2019-04-291-9/+9
| | | | | | * unwind.c (uw_late_init): Move uw-block, uw-captured-block, uw-menv, uw-catch, uw-handle, uw-cont-copy, uw-guard, uw-fcall and uw-eval into the system package.
* bugfix: source lineno off by one under hash bang.Kaz Kylheku2019-04-214-4/+20
| | | | | | | | | | | | | | * eval.c (load): When we read and discard a hash bang line, we must set the parser line number to two. * parser.c (parser_set_lineno): New function. * parser.h (parser_set_lineno): Declared. * txr.c (check_hash_bang): New argument, occurs. (txr_main): Track whether hash bang has occurred in a new local variable hb_occurs. Then, before parsing, if hash bang has occurred, set the line number to two.
* parser: always use stream-associated parser for parse_once.Kaz Kylheku2019-04-216-26/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This refactoring is needed for fixing the off-by-one line number bug when the hash bang line is processed. * eval.c (load): Don't define parser locally; ensure there is one in the stream and use it. * match.c (v_load): Likewise. * parser.c (get_parser_impl): Renamed to parser_get_impl and changed from internal to external linkage. (ensure_parser): Changed to external linkage. (lisp_parser_impl, read_file_common): Follow rename of get_parser_impl. * parser.h (parse_once): Declaration updated. (parser_get_impl, ensure_parser): Declared. * parser.y (parse_once): Take self parameter; drop parser parameter. Ensure a parser to the stream, rather than declaring one locally. Don't clean up the parser when done, just let the stream clean it up. * txr.c (parse_once_noerr): Parser argument is dropped and not passed to parse_once. Program name is passed as self argument to parse_once. (txr_main): When parsing the TXR pattern query, don't define a parser locally; ensure there is one in the stream and use it, like in load and v_load.
* New function: window-mapdo.Kaz Kylheku2019-04-214-13/+51
| | | | | | | | | | | | | | | | * lib.c (enum wmap_op): New enum type. (window_map_list): Use enum wmap_op for last argument instead of Boolean flag. If the argument is WMAP_MAPDO, do not accumulate. (window_map_vec, window_map, window_mapped): Adjust to new enum argument. (window_mapdo): New function. * lib.h (window_mapdo): Declared. * eval.c (eval_init): window-mapdo intrinsic registered. * txr.1: Documented.
* debugger: eval frames.Kaz Kylheku2019-04-214-32/+97
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We introduce evaluation tracking frames. The backtrace function can use these to deduce the line from which a function is called (if called from interpreted code). Eventually we will have analogous virtual machine frames to do this for compiled code. * eval.c (do_eval): If backtraces are enabled, then push and pop an eval frame, which holds the two key pieces: the form and environment. * share/txr/stdlib/debug.tl ((fcall-frame loc), (fcall-frame print-trace), (eval-frame loc), (eval-frame print-trace)): New methods. (print-backtrace): Loop reduced to just dispatching frame-specific print-trace methods. It gives the previous and next frame to each method. The (fcall-frame print-trace) method prints function frames, using the previous form to deduce the location from which the function is called. The (eval-frame print-trace) method mostly suppresses the printing of eval frames. We print an eval frame if it is the parent of an internal function frame, and if it is the topmost frame (to identify the toplevel form at the root of the backtrace). * unwind.c (form_s): New symbol variable. (eval_frame_type): New static variable. (uw_find_frames_by_mask): Handle UW_EVAL case, producing eval-frame struct. (uw_push_eval): New function. (uw_late_init): Allocate eval-frame struct type, storing it in eval_frame_type, and gc-protect that new variable. Register uw-eval variable evaluating to a one bit mask with the UW_EVAL-th bit set. * unwind.h (enum uw_frtype): New enum constant UW_EVAL. (struct uw_eval): New struct type. (union uw_frame): New member, el. (uw_push_eval): Declared.
* unwind: use allocate-struct in frame reification.Kaz Kylheku2019-04-203-12/+8
| | | | | | | | | | * struct.c (allocate_struct): Changed from internal to external linkage. * struct.h (allocate_struct): Declared. * unwind.c (uw_get_frames, uw_find_frames_by_mask): Use allocate_struct instead of make_struct.
* defun: record source loc info.Kaz Kylheku2019-04-201-4/+4
| | | | | | | | | | | | The interpreted defun should tag the function form that is obtainable with func-get-form with source location info. * eval.c (op_defun): In all cases, propagate source loc info from the form to the function form that is bound to the function name. (op_defmacro): Propagate the source location info in the same manner: not from the body (which could be empty) but from the form.
* doc: document --backtraceKaz Kylheku2019-04-201-0/+12
| | | | | * txr.1: Document --backtrace and also that it is implied by --debug.
* New function: allocate-struct.Kaz Kylheku2019-04-192-0/+41
| | | | | | | | * struct.c (struct_init): allocate-struct intrinsic registered. (allocate_struct): New static function. * txr.1: Documented.
* backtrace: adjust backtrace formatting.Kaz Kylheku2019-04-191-2/+6
| | | | | | * share/txr/stdlib/debug.tl (print-backtrace): Force indentation and formatting off, and set maximum length and depth to condense the backtrace output.
* No-op optimization in substring.Kaz Kylheku2019-04-191-0/+2
| | | | | | * lib.c (sub_str): Optimization: if the range spans the entire string, just return it; don't allocate a copy.
* Support max length and depth for object printing.Kaz Kylheku2019-04-186-36/+356
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * hash.c (hash_print_op): Implement max length. * lib.c (lazy_str_put, out_lazy_str): Take struct strm_base * parameter and implement max length. (out_quasi_str_sym): Don't use obj_print_impl for symbol's name string; just put_string. The use of obj_print_impl causes symbols appearing as variables in quasiliterals to be truncated when max length is imposed. (out_quasi_str): Implement max length. (obj_print_impl): Implement max length and depth. Note that there is now always a non-null ctx pointer. (obj_print): Always set up context pointer for obj_print_impl. Context now has pointer to low-level stream structure, where we can access max_length and max_depth. It also carries the recursion depth. * lib.h (lazy_str_put): Declaration updated. * stream.c (strm_base_init): Add initializers for max_length and max_depth. (put_string): Pass stream structure to lazy_str_put. (set_max_length, set_max_depth): New functions. (stream_init): set-max-length and set-max-depth intrinsics registered. * stream.h (struct strm_ctx): New members depth and strm. (struct strm_base): New members max_length and max_depth. (set_max_length, set_max_depth): Declared. * txr.1: Documented.
* doc: wrongly formatted with-resources example.Kaz Kylheku2019-04-171-7/+8
| | | | | | * txr.1: example of with-resources should use .verb not .mono. This must be because it previously used .cblk without indentation.
* streams: force-off indent mode.Kaz Kylheku2019-04-166-32/+93
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The fourth indent mode indent-foff (force off) is introduced. * buf.c (buf_print): Turn on data mode indentation if the current mode is not indent-foff, rather than when it is indent-off. * lib.c (obj_print_impl): The unconditional set_indent_mode calls are replaced with test_neq_set_indent_mode so we only set the mode if it is not forced off. * stream.c (formatv): For the ! directive, turn on data mode identation is not indent-foff, rather than when it is indent-off. (put_string, put_char, width_check): Recognize ident-foff as indentation off. (test_neq_set_indent_mode): New function. (stream_init): Register test-neq-set-indent-mode function and indent-foff variable. * stream.h (indent_mode): New enum constant, indent_foff. (test_neq_set_indent_mode): Declared. * struct.c (struct_inst_print): Turn on data mode indentation if the current mode is not indent-foff, rather than when it is indent-off. * txr.1: Documented.
* debugger: initial backtrace support.Kaz Kylheku2019-04-1611-26/+355
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * debug.c (debug_state): Switch to unsigned, since this is now a bitmask. (sys_print_backtrace_s): New symbol variable. (dbg_clear, dbg_set, dbg_restore): New static functions. (debug_init): Initialize sys_print_backtrace_s. Register dbg-clear, dbg-set, dbg-restore intrinsics. Register dbg-enable, dbg-step, dbg-backtrace and dbg-all bitmask variables, Lisp equivalents of DBG_ENABLE, DBG_SETP, DBG_BACKTRACE and DBG_ALL. (debug_dump_backtrace): New function. * debug.h (opt_debugger): Declaration removed. (debug_state): Declaration updated. (DBG_ENABLE, DBG_STEP, DBG_BACKTRACE, DBG_ALL): New preprocessor symbols. (debug_set_state): Inline function removed. (debug_clear, debug_set, debug_restore): New inline functions. (dbg_backtrace, dbg_fcall_begin, dbg_fcall_end): New macros. (debug_dump_backtrace): Declared. * eval.c (error_trace): Invoke debug_dump_backtrace if support is compiled in and backtraces are enabled. * lib.c (do_generic_funcall): New function, copy of generic_funcall. (generic_funcall): Now a wrapper for do_generic_funcall which registers fcall frames if backtrace support is enabled. (funcall, funcall1, funcall2, funcall3, funcall4): Route to slow generic_funcall path if backtraces are enabled. * lisplib.c (debugger_instantiate, debugger_set_entries): New static functions. (lisplib_init): Autload support for debug module via above new functions. (lisplib_try_load): Save and restore debugger state in new way using debug_set and debug_restore, with specific mask values. * parser.y (parse_once): Disable debugging in new way. * share/txr/stdlib/debug.tl New file. * sighal.h (EJ_DBG_MEMB, EJ_DBG_SAVE, EJ_DBG_REST): New macros for saving/restoring debug state. (EJ_OPT_MEMB, EJ_OPT_SAVE, EJ_OPT_REST): Reference the above macros to include debug state in extended jump context. * txr.c (help): Document --backtrace and that that -d implies --backtrace. (txr_main): Enable debugger using debug_set. Provide new --backtrace option to enable backtraces only. * unwind.c (args_s): New symbol variable. (fcall_frame_type): New static variable. (unwind_to_exit_point): Save pointer to original frame stack and restore it when calling error_trace. This is so that error_trace can walk the stack to collect a backtrace. (uw_find_frames_by_mask, uw_push_fcall): New functions. (uw_late_init): Initialize args_s and fcall_frame_type. gc-protect fcall_frame_type. Register uw-* variables corresponding to the UW_* frame types. * unwind.h (uw_frtype_t): New enum constant UW_FCALL. (struct uw_fcall): New frame structure. (union uw_frame): New member fc. (uw_push_fcall, uw_find_frames_by_mask): Declared.
* cmdline: intercept errors from compiled files.Kaz Kylheku2019-04-161-1/+9
| | | | | | * txr.c (read_compiled_file_noerr): New static function. (txr_main): Use read_compied_file indirectly through read_compiled_file_noerr wrapper.
* cmdline: use handler instead of catch for errors.Kaz Kylheku2019-04-163-8/+21
| | | | | | | | | | | | | | | | | | | Errors encountered when parsing or evaluating a source file should be handled using a handler rather than a catch, so that the unwind stack is available to the error reporting function. This anticipates being able to dump a backtrace. * txr.c (parse_once_noerr, read_eval_stream_noerr): Adjust to reduced argument count in ignerr_func_body macro. * unwind.c (uw_trace_error): New function. * unwind.h (uw_trace_error): Declared. (ignerr_func_body): Revised to establish a handler in addition to the catch. The catch now doesn't do anything other than provide an intercepting exit point; the error_trace call is moved into the handler, and so it executes in a context where unwinding hasn't happened yet.
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