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Implement print-circle, allowing recursive and circular structures to be read. src/ChangeLog addition: 2011-09-04 Aidan Kehoe <kehoea@parhasard.net> * alloc.c: * alloc.c (ALLOC_FROB_BLOCK_LISP_OBJECT_1): * alloc.c (ALLOC_FROB_BLOCK_LISP_OBJECT): * alloc.c (cons_print_preprocess): * alloc.c (vector_print_preprocess): * alloc.c (vector_nsubst_structures_descend): * alloc.c (Fmake_symbol): * alloc.c (UNMARK_symbol): * alloc.c (sweep_symbols): * alloc.c (reinit_alloc_objects_early): * alloc.c (reinit_alloc_early): * bytecode.c: * bytecode.c (compiled_function_print_preprocess): * bytecode.c (compiled_function_nsubst_structures_descend): * bytecode.c (set_compiled_function_arglist): * bytecode.c (set_compiled_function_interactive): * bytecode.c (bytecode_objects_create): * chartab.c: * chartab.c (print_preprocess_mapper): * chartab.c (nsubst_structures_mapper): * chartab.c (char_table_nsubst_structures_descend): * chartab.c (chartab_objects_create): * elhash.c: * elhash.c (nsubst_structures_map_hash_table): * elhash.c (hash_table_nsubst_structures_descend): * elhash.c (print_preprocess_mapper): * elhash.c (hash_table_print_preprocess): * elhash.c (inchash_eq): * elhash.c (hash_table_objects_create): * elhash.c (syms_of_elhash): * elhash.h: * emacs.c (main_1): * fns.c: * fns.c (check_eq_nokey): * fns.c (Fnsubst): * fns.c (syms_of_fns): * lisp.h: * lisp.h (struct Lisp_Symbol): * lisp.h (IN_OBARRAY): * lisp.h (struct): * lisp.h (PRINT_PREPROCESS): * lread.c (read1): * lrecord.h: * lrecord.h (struct lrecord_implementation): * lrecord.h (DEFINE_DUMPABLE_MODULE_LISP_OBJECT): * print.c: * print.c (PRINT_CIRCLE_LIMIT): * print.c (print_continuous_numbering_changed): * print.c (print_prepare): * print.c (print_finish): * print.c (Fprin1_to_string): * print.c (print_cons): * print.c (print_preprocess_inchash_eq): * print.c (print_preprocess): * print.c (print_sort_get_numbers): * print.c (print_sort_compare_ordinals): * print.c (print_gensym_or_circle): * print.c (nsubst_structures_descend): * print.c (nsubst_structures): * print.c (print_internal): * print.c (print_symbol): * print.c (vars_of_print): * rangetab.c: * rangetab.c (range_table_print_preprocess): * rangetab.c (range_table_nsubst_structures_descend): * rangetab.c (rangetab_objects_create): * rangetab.c (syms_of_rangetab): * symbols.c: * symbols.c (symbol_print_preprocess): * symbols.c (Fintern): * symbols.c (Funintern): * symbols.c (reinit_symbol_objects_early): * symbols.c (init_symbols_once_early): * symsinit.h: Implement print-circle, printing circular structures in a readable fashion, and treating them appropriately on read. This is by means of two new object methods, print_preprocess (detecting circularities), and nsubst_structures_descend (replacing placeholders with the read objects). Expose the substitution to Lisp via #'nsubst and its new :descend-structures keyword. Store information as to whether symbols are interned in obarray or not in their header, making checking for keywords and uninterned symbols (and thus printing) cheaper. Default print_gensym to t, as Common Lisp does, and as a more-than-decade old comment suggests. lisp/ChangeLog addition: 2011-09-04 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el (byte-compile-output-file-form): * bytecomp.el (byte-compile-output-docform): Bind print-circle, print-continuous-numbering in these functions, now those variables are available. * lisp.el (forward-sexp): * lisp.el (backward-sexp): Recognise leading #N= as being part of an expression. tests/ChangeLog addition: 2011-09-04 Aidan Kehoe <kehoea@parhasard.net> * automated/lisp-reader-tests.el: * automated/lisp-tests.el (literal-with-uninterned): * automated/symbol-tests.el (foo): Test print-circle, for printing (mutually-)recursive and circular structures. Bind print-continuous-numbering where appropriate.
author Aidan Kehoe <kehoea@parhasard.net>
date Sun, 04 Sep 2011 19:51:35 +0100
parents 308d34e9f07d
children
line wrap: on
line source

/* Execution of byte code produced by bytecomp.el.
   Implementation of compiled-function objects.
   Copyright (C) 1992, 1993 Free Software Foundation, Inc.
   Copyright (C) 1995, 2002, 2010 Ben Wing.

This file is part of XEmacs.

XEmacs is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

XEmacs is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with XEmacs.  If not, see <http://www.gnu.org/licenses/>. */

/* Synched up with: Mule 2.0, FSF 19.30. */

/* There is more than one place in bytecode.c that may want to do something
   with the list of all the opcodes.  To handle this, we extract them into
   a separate file that can get included after defining OPCODE(sym, val)
   appropriately.  No need to undefine OPCODE; that happens automatically.
*/

  OPCODE (varref,  			010)
  OPCODE (varset,  			020)
  OPCODE (varbind, 			030)
  OPCODE (call,    			040)
  OPCODE (unbind,  			050)

  OPCODE (nth,     			070)
  OPCODE (symbolp, 			071)
  OPCODE (consp,   			072)
  OPCODE (stringp, 			073)
  OPCODE (listp,   			074)
  OPCODE (old_eq,  			075)
  OPCODE (old_memq, 			076)
  OPCODE (not,    			077)
  OPCODE (car,    			0100)
  OPCODE (cdr, 	  			0101)
  OPCODE (cons,   			0102)
  OPCODE (list1,  			0103)
  OPCODE (list2,  			0104)
  OPCODE (list3,  			0105)
  OPCODE (list4,  			0106)
  OPCODE (length, 			0107)
  OPCODE (aref,   			0110)
  OPCODE (aset,   			0111)
  OPCODE (symbol_value, 		0112)
  OPCODE (symbol_function, 		0113)
  OPCODE (set,    			0114)
  OPCODE (fset,   			0115)
  OPCODE (get,    			0116)
  OPCODE (subseq, 			0117)
  OPCODE (concat2, 			0120)
  OPCODE (concat3, 			0121)
  OPCODE (concat4, 			0122)
  OPCODE (sub1, 			0123)
  OPCODE (add1, 			0124)
  OPCODE (eqlsign, 			0125)
  OPCODE (gtr, 				0126)
  OPCODE (lss, 				0127)
  OPCODE (leq, 				0130)
  OPCODE (geq, 				0131)
  OPCODE (diff, 			0132)
  OPCODE (negate, 			0133)
  OPCODE (plus, 			0134)
  OPCODE (max, 				0135)
  OPCODE (min, 				0136)
  OPCODE (mult, 			0137)

  OPCODE (point, 			0140)
  OPCODE (eq, 				0141) /* was Bmark, but no longer
						 generated as of v18 */
  OPCODE (goto_char, 			0142)
  OPCODE (insert, 			0143)
  OPCODE (point_max, 			0144)
  OPCODE (point_min, 			0145)
  OPCODE (char_after, 			0146)
  OPCODE (following_char, 		0147)
  OPCODE (preceding_char, 		0150)
  OPCODE (current_column, 		0151)
  OPCODE (indent_to, 			0152)
  OPCODE (equal, 			0153) /* was Bscan_buffer, but no
						 longer generated as of
						 v18 */
  OPCODE (eolp, 			0154)
  OPCODE (eobp, 			0155)
  OPCODE (bolp, 			0156)
  OPCODE (bobp, 			0157)
  OPCODE (current_buffer, 		0160)
  OPCODE (set_buffer, 			0161)
  OPCODE (save_current_buffer, 		0162) /* was Bread_char, but no
						 longer generated as of
						 v19 */
  OPCODE (memq, 			0163) /* was Bset_mark, but no
						 longer generated as of
						 v18 */
  OPCODE (interactive_p, 		0164) /* Needed since interactive-p
						 takes unevalled args */
  OPCODE (forward_char, 		0165)
  OPCODE (forward_word, 		0166)
  OPCODE (skip_chars_forward, 		0167)
  OPCODE (skip_chars_backward, 		0170)
  OPCODE (forward_line, 		0171)
  OPCODE (char_syntax, 			0172)
  OPCODE (buffer_substring, 		0173)
  OPCODE (delete_region, 		0174)
  OPCODE (narrow_to_region, 		0175)
  OPCODE (widen, 			0176)
  OPCODE (end_of_line, 			0177)

  OPCODE (constant2, 			0201)
  OPCODE (goto, 			0202)
  OPCODE (gotoifnil, 			0203)
  OPCODE (gotoifnonnil, 		0204)
  OPCODE (gotoifnilelsepop, 		0205)
  OPCODE (gotoifnonnilelsepop, 		0206)
  OPCODE (return, 			0207)
  OPCODE (discard, 			0210)
  OPCODE (dup, 				0211)

  OPCODE (save_excursion, 		0212)
  OPCODE (save_window_excursion,	0213)
  OPCODE (save_restriction, 		0214)
  OPCODE (catch, 			0215)

  OPCODE (unwind_protect, 		0216)
  OPCODE (condition_case, 		0217)
  OPCODE (temp_output_buffer_setup, 	0220)
  OPCODE (temp_output_buffer_show,  	0221)

  OPCODE (unbind_all,			0222)

  OPCODE (set_marker,			0223)
  OPCODE (match_beginning,		0224)
  OPCODE (match_end,			0225)
  OPCODE (upcase,			0226)
  OPCODE (downcase,			0227)

  OPCODE (string_equal, 		0230)
  OPCODE (string_lessp,     		0231)
  OPCODE (old_equal, 	 		0232)
  OPCODE (nthcdr, 	 		0233)
  OPCODE (elt, 		 		0234)
  OPCODE (old_member, 	 		0235)
  OPCODE (old_assq, 	 		0236)
  OPCODE (nreverse, 	 		0237)
  OPCODE (setcar, 	 		0240)
  OPCODE (setcdr, 	 		0241)
  OPCODE (car_safe, 	 		0242)
  OPCODE (cdr_safe, 	 		0243)
  OPCODE (nconc, 	 		0244)
  OPCODE (quo, 		 		0245)
  OPCODE (rem, 		 		0246)
  OPCODE (numberp, 	 		0247)
  OPCODE (fixnump, 	 		0250) /* Was Bintegerp. */

  OPCODE (Rgoto, 			0252)
  OPCODE (Rgotoifnil, 			0253)
  OPCODE (Rgotoifnonnil, 		0254)
  OPCODE (Rgotoifnilelsepop, 		0255)
  OPCODE (Rgotoifnonnilelsepop, 	0256)

  OPCODE (listN, 			0257)
  OPCODE (concatN, 			0260)
  OPCODE (insertN, 			0261)

  OPCODE (bind_multiple_value_limits,   0262) /* New in 21.5. */
  OPCODE (multiple_value_list_internal, 0263) /* New in 21.5. */
  OPCODE (multiple_value_call,          0264) /* New in 21.5. */
  OPCODE (throw,                        0265) /* New in 21.5. */

  OPCODE (member, 			0266) /* new in v20 */
  OPCODE (assq, 			0267) /* new in v20 */

  OPCODE (constant,			0300)

#undef OPCODE