]> git.saurik.com Git - bison.git/blob - data/yacc.c
projects / bison.git / blob
? search:


80b7ab5ff5cc001832b08cbd8b87dbbc5ef41ce4
[bison.git] / data / yacc.c
1 -*- C -*-
2 # Yacc compatible skeleton for Bison
3
4 # Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation,
5 # Inc.
6
7 m4_pushdef([b4_copyright_years],
8 [1984, 1989-1990, 2000-2012])
9
10 # This program is free software: you can redistribute it and/or modify
11 # it under the terms of the GNU General Public License as published by
12 # the Free Software Foundation, either version 3 of the License, or
13 # (at your option) any later version.
14 #
15 # This program is distributed in the hope that it will be useful,
16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 # GNU General Public License for more details.
19 #
20 # You should have received a copy of the GNU General Public License
21 # along with this program. If not, see <http://www.gnu.org/licenses/>.
22
23 # Check the value of %define api.push-pull.
24 b4_percent_define_default([[api.push-pull]], [[pull]])
25 b4_percent_define_check_values([[[[api.push-pull]],
26 [[pull]], [[push]], [[both]]]])
27 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
28 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
29 m4_case(b4_percent_define_get([[api.push-pull]]),
30 [pull], [m4_define([b4_push_flag], [[0]])],
31 [push], [m4_define([b4_pull_flag], [[0]])])
32
33 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
34 # tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the
35 # behavior of Bison at all when push parsing is already requested.
36 b4_define_flag_if([use_push_for_pull])
37 b4_use_push_for_pull_if([
38 b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
39 [m4_define([b4_push_flag], [[1]])])])
40
41 # Check the value of %define parse.lac and friends, where LAC stands for
42 # lookahead correction.
43 b4_percent_define_default([[parse.lac]], [[none]])
44 b4_percent_define_default([[parse.lac.es-capacity-initial]], [[20]])
45 b4_percent_define_default([[parse.lac.memory-trace]], [[failures]])
46 b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]],
47 [[[[parse.lac.memory-trace]],
48 [[failures]], [[full]]]])
49 b4_define_flag_if([lac])
50 m4_define([b4_lac_flag],
51 [m4_if(b4_percent_define_get([[parse.lac]]),
52 [none], [[0]], [[1]])])
53
54 m4_include(b4_pkgdatadir/[c.m4])
55
56 ## ---------------- ##
57 ## Default values. ##
58 ## ---------------- ##
59
60 # Stack parameters.
61 m4_define_default([b4_stack_depth_max], [10000])
62 m4_define_default([b4_stack_depth_init], [200])
63
64
65 ## ------------------------ ##
66 ## Pure/impure interfaces. ##
67 ## ------------------------ ##
68
69 b4_percent_define_default([[api.pure]], [[false]])
70 b4_define_flag_if([pure])
71 m4_define([b4_pure_flag],
72 [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])
73
74 # b4_yacc_pure_if(IF-TRUE, IF-FALSE)
75 # ----------------------------------
76 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
77 m4_define([b4_yacc_pure_if],
78 [b4_pure_if([m4_ifset([b4_parse_param],
79 [$1], [$2])],
80 [$2])])
81
82
83 # b4_yyerror_args
84 # ---------------
85 # Arguments passed to yyerror: user args plus yylloc.
86 m4_define([b4_yyerror_args],
87 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
88 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
89
90
91 # b4_lex_param
92 # ------------
93 # Accumulate in b4_lex_param all the yylex arguments.
94 # b4_lex_param arrives quoted twice, but we want to keep only one level.
95 m4_define([b4_lex_param],
96 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
97 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
98 m4_ifdef([b4_lex_param], b4_lex_param)))
99
100
101 ## ------------ ##
102 ## Data Types. ##
103 ## ------------ ##
104
105 # b4_int_type(MIN, MAX)
106 # ---------------------
107 # Return the smallest int type able to handle numbers ranging from
108 # MIN to MAX (included). Overwrite the version from c.m4, which
109 # uses only C89 types, so that the user can override the shorter
110 # types, and so that pre-C89 compilers are handled correctly.
111 m4_define([b4_int_type],
112 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
113 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
114
115 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
116 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
117
118 m4_eval([0 <= $1]), [1], [unsigned int],
119
120 [int])])
121
122
123 ## ----------------- ##
124 ## Semantic Values. ##
125 ## ----------------- ##
126
127
128 # b4_lhs_value([TYPE])
129 # --------------------
130 # Expansion of $<TYPE>$.
131 m4_define([b4_lhs_value],
132 [b4_symbol_value(yyval, [$1])])
133
134
135 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
136 # --------------------------------------
137 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
138 # symbols on RHS.
139 m4_define([b4_rhs_value],
140 [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
141
142
143
144 ## ----------- ##
145 ## Locations. ##
146 ## ----------- ##
147
148 # b4_lhs_location()
149 # -----------------
150 # Expansion of @$.
151 m4_define([b4_lhs_location],
152 [(yyloc)])
153
154
155 # b4_rhs_location(RULE-LENGTH, NUM)
156 # ---------------------------------
157 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
158 # on RHS.
159 m4_define([b4_rhs_location],
160 [(yylsp@{b4_subtract([$2], [$1])@})])
161
162
163 ## -------------- ##
164 ## Declarations. ##
165 ## -------------- ##
166
167 # b4_declare_scanner_communication_variables
168 # ------------------------------------------
169 # Declare the variables that are global, or local to YYPARSE if
170 # pure-parser.
171 m4_define([b4_declare_scanner_communication_variables], [[
172 /* The lookahead symbol. */
173 int yychar;
174
175 /* The semantic value of the lookahead symbol. */
176 YYSTYPE yylval;]b4_locations_if([[
177
178 /* Location data for the lookahead symbol. */
179 YYLTYPE yylloc;]])b4_pure_if([], [[
180
181 /* Number of syntax errors so far. */
182 int yynerrs;]])])
183
184
185 # b4_declare_parser_state_variables
186 # ---------------------------------
187 # Declare all the variables that are needed to maintain the parser state
188 # between calls to yypush_parse.
189 m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
190 /* Number of syntax errors so far. */
191 int yynerrs;
192 ]])[
193 int yystate;
194 /* Number of tokens to shift before error messages enabled. */
195 int yyerrstatus;
196
197 /* The stacks and their tools:
198 `yyss': related to states.
199 `yyvs': related to semantic values.]b4_locations_if([[
200 `yyls': related to locations.]])[
201
202 Refer to the stacks through separate pointers, to allow yyoverflow
203 to reallocate them elsewhere. */
204
205 /* The state stack. */
206 yytype_int16 yyssa[YYINITDEPTH];
207 yytype_int16 *yyss;
208 yytype_int16 *yyssp;
209
210 /* The semantic value stack. */
211 YYSTYPE yyvsa[YYINITDEPTH];
212 YYSTYPE *yyvs;
213 YYSTYPE *yyvsp;]b4_locations_if([[
214
215 /* The location stack. */
216 YYLTYPE yylsa[YYINITDEPTH];
217 YYLTYPE *yyls;
218 YYLTYPE *yylsp;
219
220 /* The locations where the error started and ended. */
221 YYLTYPE yyerror_range[3];]])[
222
223 YYSIZE_T yystacksize;]b4_lac_if([[
224
225 yytype_int16 yyesa@{]b4_percent_define_get([[parse.lac.es-capacity-initial]])[@};
226 yytype_int16 *yyes;
227 YYSIZE_T yyes_capacity;]])])
228
229
230 # b4_declare_yyparse_push_
231 # ------------------------
232 # Declaration of yyparse (and dependencies) when using the push parser
233 # (including in pull mode).
234 m4_define([b4_declare_yyparse_push_],
235 [[#ifndef YYPUSH_MORE_DEFINED
236 # define YYPUSH_MORE_DEFINED
237 enum { YYPUSH_MORE = 4 };
238 #endif
239
240 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
241
242 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
243 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
244 [[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([,
245 [[[int pushed_char]], [[pushed_char]]],
246 [[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([,
247 [[b4_api_PREFIX[LTYPE const *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,
248 b4_parse_param]))
249 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
250 [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,
251 b4_parse_param]))])
252 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
253 [[[void]], []])
254 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
255 [[b4_prefix[pstate *ps]], [[ps]]])dnl
256 ])
257
258 # b4_declare_yyparse_
259 # -------------------
260 # When not the push parser.
261 m4_define([b4_declare_yyparse_],
262 [[#ifdef YYPARSE_PARAM
263 ]b4_c_function_decl(b4_prefix[parse], [int],
264 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
265 #else /* ! YYPARSE_PARAM */
266 ]b4_c_function_decl(b4_prefix[parse], [int], b4_parse_param)[
267 #endif /* ! YYPARSE_PARAM */]dnl
268 ])
269
270
271 # b4_declare_yyparse
272 # ------------------
273 m4_define([b4_declare_yyparse],
274 [b4_push_if([b4_declare_yyparse_push_],
275 [b4_declare_yyparse_])[]dnl
276 ])
277
278
279 # b4_shared_declarations
280 # ----------------------
281 # Declaration that might either go into the header (if --defines)
282 # or open coded in the parser body.
283 m4_define([b4_shared_declarations],
284 [b4_cpp_guard_open([b4_spec_defines_file])[
285 ]b4_declare_yydebug[
286 ]b4_percent_code_get([[requires]])[
287 ]b4_token_enums_defines[
288 ]b4_declare_yylstype[
289 ]b4_declare_yyparse[
290 ]b4_percent_code_get([[provides]])[
291 ]b4_cpp_guard_close([b4_spec_defines_file])[]dnl
292 ])
293
294 ## -------------- ##
295 ## Output files. ##
296 ## -------------- ##
297
298 # We do want M4 expansion after # for CPP macros.
299 m4_changecom()
300 m4_divert_push(0)dnl
301 @output(b4_parser_file_name@)@
302 b4_copyright([Bison implementation for Yacc-like parsers in C])[
303
304 /* C LALR(1) parser skeleton written by Richard Stallman, by
305 simplifying the original so-called "semantic" parser. */
306
307 /* All symbols defined below should begin with yy or YY, to avoid
308 infringing on user name space. This should be done even for local
309 variables, as they might otherwise be expanded by user macros.
310 There are some unavoidable exceptions within include files to
311 define necessary library symbols; they are noted "INFRINGES ON
312 USER NAME SPACE" below. */
313
314 ]b4_identification
315 b4_percent_code_get([[top]])[]dnl
316 m4_if(b4_api_prefix, [yy], [],
317 [[/* Substitute the type names. */
318 #define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[
319 #define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[
320 ]m4_if(b4_prefix, [yy], [],
321 [[/* Substitute the variable and function names. */]b4_pull_if([[
322 #define yyparse ]b4_prefix[parse]])b4_push_if([[
323 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
324 #define yypull_parse ]b4_prefix[pull_parse]])[
325 #define yypstate_new ]b4_prefix[pstate_new
326 #define yypstate_delete ]b4_prefix[pstate_delete
327 #define yypstate ]b4_prefix[pstate]])[
328 #define yylex ]b4_prefix[lex
329 #define yyerror ]b4_prefix[error
330 #define yylval ]b4_prefix[lval
331 #define yychar ]b4_prefix[char
332 #define yydebug ]b4_prefix[debug
333 #define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
334 #define yylloc ]b4_prefix[lloc]])])[
335
336 /* Copy the first part of user declarations. */
337 ]b4_user_pre_prologue[
338
339 ]b4_null_define[
340
341 /* Enabling verbose error messages. */
342 #ifdef YYERROR_VERBOSE
343 # undef YYERROR_VERBOSE
344 # define YYERROR_VERBOSE 1
345 #else
346 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
347 #endif
348
349 /* In a future release of Bison, this section will be replaced
350 by #include "@basename(]b4_spec_defines_file[@)". */
351 ]b4_shared_declarations[
352
353 /* Copy the second part of user declarations. */
354 ]b4_user_post_prologue
355 b4_percent_code_get[]dnl
356
357 [#ifdef short
358 # undef short
359 #endif
360
361 #ifdef YYTYPE_UINT8
362 typedef YYTYPE_UINT8 yytype_uint8;
363 #else
364 typedef unsigned char yytype_uint8;
365 #endif
366
367 #ifdef YYTYPE_INT8
368 typedef YYTYPE_INT8 yytype_int8;
369 #elif ]b4_c_modern[
370 typedef signed char yytype_int8;
371 #else
372 typedef short int yytype_int8;
373 #endif
374
375 #ifdef YYTYPE_UINT16
376 typedef YYTYPE_UINT16 yytype_uint16;
377 #else
378 typedef unsigned short int yytype_uint16;
379 #endif
380
381 #ifdef YYTYPE_INT16
382 typedef YYTYPE_INT16 yytype_int16;
383 #else
384 typedef short int yytype_int16;
385 #endif
386
387 #ifndef YYSIZE_T
388 # ifdef __SIZE_TYPE__
389 # define YYSIZE_T __SIZE_TYPE__
390 # elif defined size_t
391 # define YYSIZE_T size_t
392 # elif ! defined YYSIZE_T && ]b4_c_modern[
393 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
394 # define YYSIZE_T size_t
395 # else
396 # define YYSIZE_T unsigned int
397 # endif
398 #endif
399
400 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
401
402 #ifndef YY_
403 # if defined YYENABLE_NLS && YYENABLE_NLS
404 # if ENABLE_NLS
405 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
406 # define YY_(msgid) dgettext ("bison-runtime", msgid)
407 # endif
408 # endif
409 # ifndef YY_
410 # define YY_(msgid) msgid
411 # endif
412 #endif
413
414 /* Suppress unused-variable warnings by "using" E. */
415 #if ! defined lint || defined __GNUC__
416 # define YYUSE(e) ((void) (e))
417 #else
418 # define YYUSE(e) /* empty */
419 #endif
420
421 /* Identity function, used to suppress warnings about constant conditions. */
422 #ifndef lint
423 # define YYID(n) (n)
424 #else
425 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
426 {
427 return yyi;
428 }
429 #endif
430
431 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
432
433 /* The parser invokes alloca or malloc; define the necessary symbols. */]dnl
434 b4_push_if([], [b4_lac_if([], [[
435
436 # ifdef YYSTACK_USE_ALLOCA
437 # if YYSTACK_USE_ALLOCA
438 # ifdef __GNUC__
439 # define YYSTACK_ALLOC __builtin_alloca
440 # elif defined __BUILTIN_VA_ARG_INCR
441 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
442 # elif defined _AIX
443 # define YYSTACK_ALLOC __alloca
444 # elif defined _MSC_VER
445 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
446 # define alloca _alloca
447 # else
448 # define YYSTACK_ALLOC alloca
449 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && ]b4_c_modern[
450 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
451 /* Use EXIT_SUCCESS as a witness for stdlib.h. */
452 # ifndef EXIT_SUCCESS
453 # define EXIT_SUCCESS 0
454 # endif
455 # endif
456 # endif
457 # endif
458 # endif]])])[
459
460 # ifdef YYSTACK_ALLOC
461 /* Pacify GCC's `empty if-body' warning. */
462 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
463 # ifndef YYSTACK_ALLOC_MAXIMUM
464 /* The OS might guarantee only one guard page at the bottom of the stack,
465 and a page size can be as small as 4096 bytes. So we cannot safely
466 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
467 to allow for a few compiler-allocated temporary stack slots. */
468 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
469 # endif
470 # else
471 # define YYSTACK_ALLOC YYMALLOC
472 # define YYSTACK_FREE YYFREE
473 # ifndef YYSTACK_ALLOC_MAXIMUM
474 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
475 # endif
476 # if (defined __cplusplus && ! defined EXIT_SUCCESS \
477 && ! ((defined YYMALLOC || defined malloc) \
478 && (defined YYFREE || defined free)))
479 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
480 # ifndef EXIT_SUCCESS
481 # define EXIT_SUCCESS 0
482 # endif
483 # endif
484 # ifndef YYMALLOC
485 # define YYMALLOC malloc
486 # if ! defined malloc && ! defined EXIT_SUCCESS && ]b4_c_modern[
487 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
488 # endif
489 # endif
490 # ifndef YYFREE
491 # define YYFREE free
492 # if ! defined free && ! defined EXIT_SUCCESS && ]b4_c_modern[
493 void free (void *); /* INFRINGES ON USER NAME SPACE */
494 # endif
495 # endif
496 # endif]b4_lac_if([[
497 # define YYCOPY_NEEDED 1]])[
498 #endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[
499
500
501 #if (! defined yyoverflow \
502 && (! defined __cplusplus \
503 || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \
504 && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL)))
505
506 /* A type that is properly aligned for any stack member. */
507 union yyalloc
508 {
509 yytype_int16 yyss_alloc;
510 YYSTYPE yyvs_alloc;]b4_locations_if([
511 YYLTYPE yyls_alloc;])[
512 };
513
514 /* The size of the maximum gap between one aligned stack and the next. */
515 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
516
517 /* The size of an array large to enough to hold all stacks, each with
518 N elements. */
519 ]b4_locations_if(
520 [# define YYSTACK_BYTES(N) \
521 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
522 + 2 * YYSTACK_GAP_MAXIMUM)],
523 [# define YYSTACK_BYTES(N) \
524 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
525 + YYSTACK_GAP_MAXIMUM)])[
526
527 # define YYCOPY_NEEDED 1
528
529 /* Relocate STACK from its old location to the new one. The
530 local variables YYSIZE and YYSTACKSIZE give the old and new number of
531 elements in the stack, and YYPTR gives the new location of the
532 stack. Advance YYPTR to a properly aligned location for the next
533 stack. */
534 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
535 do \
536 { \
537 YYSIZE_T yynewbytes; \
538 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
539 Stack = &yyptr->Stack_alloc; \
540 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
541 yyptr += yynewbytes / sizeof (*yyptr); \
542 } \
543 while (YYID (0))
544
545 #endif
546
547 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED
548 /* Copy COUNT objects from SRC to DST. The source and destination do
549 not overlap. */
550 # ifndef YYCOPY
551 # if defined __GNUC__ && 1 < __GNUC__
552 # define YYCOPY(Dst, Src, Count) \
553 __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
554 # else
555 # define YYCOPY(Dst, Src, Count) \
556 do \
557 { \
558 YYSIZE_T yyi; \
559 for (yyi = 0; yyi < (Count); yyi++) \
560 (Dst)[yyi] = (Src)[yyi]; \
561 } \
562 while (YYID (0))
563 # endif
564 # endif
565 #endif /* !YYCOPY_NEEDED */
566
567 /* YYFINAL -- State number of the termination state. */
568 #define YYFINAL ]b4_final_state_number[
569 /* YYLAST -- Last index in YYTABLE. */
570 #define YYLAST ]b4_last[
571
572 /* YYNTOKENS -- Number of terminals. */
573 #define YYNTOKENS ]b4_tokens_number[
574 /* YYNNTS -- Number of nonterminals. */
575 #define YYNNTS ]b4_nterms_number[
576 /* YYNRULES -- Number of rules. */
577 #define YYNRULES ]b4_rules_number[
578 /* YYNSTATES -- Number of states. */
579 #define YYNSTATES ]b4_states_number[
580
581 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
582 by yylex, with out-of-bounds checking. */
583 #define YYUNDEFTOK ]b4_undef_token_number[
584 #define YYMAXUTOK ]b4_user_token_number_max[
585
586 #define YYTRANSLATE(YYX) \
587 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
588
589 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
590 as returned by yylex, without out-of-bounds checking. */
591 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
592 {
593 ]b4_translate[
594 };
595
596 #if ]b4_api_PREFIX[DEBUG
597 ]b4_integral_parser_table_define([rline], [b4_rline],
598 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
599 #endif
600
601 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
602 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
603 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
604 static const char *const yytname[] =
605 {
606 ]b4_tname[
607 };
608 #endif
609
610 # ifdef YYPRINT
611 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
612 (internal) symbol number NUM (which must be that of a token). */
613 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
614 {
615 ]b4_toknum[
616 };
617 # endif
618
619 #define YYPACT_NINF ]b4_pact_ninf[
620
621 #define yypact_value_is_default(yystate) \
622 ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
623
624 #define YYTABLE_NINF ]b4_table_ninf[
625
626 #define yytable_value_is_error(yytable_value) \
627 ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
628
629 ]b4_parser_tables_define[
630
631 #define yyerrok (yyerrstatus = 0)
632 #define yyclearin (yychar = YYEMPTY)
633 #define YYEMPTY (-2)
634 #define YYEOF 0
635
636 #define YYACCEPT goto yyacceptlab
637 #define YYABORT goto yyabortlab
638 #define YYERROR goto yyerrorlab
639
640
641 /* Like YYERROR except do call yyerror. This remains here temporarily
642 to ease the transition to the new meaning of YYERROR, for GCC.
643 Once GCC version 2 has supplanted version 1, this can go. However,
644 YYFAIL appears to be in use. Nevertheless, it is formally deprecated
645 in Bison 2.4.2's NEWS entry, where a plan to phase it out is
646 discussed. */
647
648 #define YYFAIL goto yyerrlab
649 #if defined YYFAIL
650 /* This is here to suppress warnings from the GCC cpp's
651 -Wunused-macros. Normally we don't worry about that warning, but
652 some users do, and we want to make it easy for users to remove
653 YYFAIL uses, which will produce warnings from Bison 2.5. */
654 #endif
655
656 #define YYRECOVERING() (!!yyerrstatus)
657
658 #define YYBACKUP(Token, Value) \
659 do \
660 if (yychar == YYEMPTY) \
661 { \
662 yychar = (Token); \
663 yylval = (Value); \
664 YYPOPSTACK (yylen); \
665 yystate = *yyssp; \]b4_lac_if([[
666 YY_LAC_DISCARD ("YYBACKUP"); \]])[
667 goto yybackup; \
668 } \
669 else \
670 { \
671 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
672 YYERROR; \
673 } \
674 while (YYID (0))
675
676
677 #define YYTERROR 1
678 #define YYERRCODE 256
679
680 ]b4_locations_if([[
681 ]b4_yylloc_default_define[
682 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
683
684 /* YY_LOCATION_PRINT -- Print the location on the stream.
685 This macro was not mandated originally: define only if we know
686 we won't break user code: when these are the locations we know. */
687
688 #ifndef YY_LOCATION_PRINT
689 # if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
690 # define YY_LOCATION_PRINT(File, Loc) \
691 fprintf (File, "%d.%d-%d.%d", \
692 (Loc).first_line, (Loc).first_column, \
693 (Loc).last_line, (Loc).last_column)
694 # else
695 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
696 # endif
697 #endif]], [[
698
699
700 /* This macro is provided for backward compatibility. */
701
702 #ifndef YY_LOCATION_PRINT
703 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
704 #endif]])[
705
706
707 /* YYLEX -- calling `yylex' with the right arguments. */
708
709 #ifdef YYLEX_PARAM
710 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
711 #else
712 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
713 #endif
714
715 /* Enable debugging if requested. */
716 #if ]b4_api_PREFIX[DEBUG
717
718 # ifndef YYFPRINTF
719 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
720 # define YYFPRINTF fprintf
721 # endif
722
723 # define YYDPRINTF(Args) \
724 do { \
725 if (yydebug) \
726 YYFPRINTF Args; \
727 } while (YYID (0))
728
729 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
730 do { \
731 if (yydebug) \
732 { \
733 YYFPRINTF (stderr, "%s ", Title); \
734 yy_symbol_print (stderr, \
735 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
736 YYFPRINTF (stderr, "\n"); \
737 } \
738 } while (YYID (0))
739
740 ]b4_yy_symbol_print_generate([b4_c_function_def])[
741
742 /*------------------------------------------------------------------.
743 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
744 | TOP (included). |
745 `------------------------------------------------------------------*/
746
747 ]b4_c_function_def([yy_stack_print], [static void],
748 [[yytype_int16 *yybottom], [yybottom]],
749 [[yytype_int16 *yytop], [yytop]])[
750 {
751 YYFPRINTF (stderr, "Stack now");
752 for (; yybottom <= yytop; yybottom++)
753 {
754 int yybot = *yybottom;
755 YYFPRINTF (stderr, " %d", yybot);
756 }
757 YYFPRINTF (stderr, "\n");
758 }
759
760 # define YY_STACK_PRINT(Bottom, Top) \
761 do { \
762 if (yydebug) \
763 yy_stack_print ((Bottom), (Top)); \
764 } while (YYID (0))
765
766
767 /*------------------------------------------------.
768 | Report that the YYRULE is going to be reduced. |
769 `------------------------------------------------*/
770
771 ]b4_c_function_def([yy_reduce_print], [static void],
772 [[yytype_int16 *yyssp], [yyssp]],
773 [[YYSTYPE *yyvsp], [yyvsp]],
774 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
775 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
776 b4_parse_param]))[
777 {
778 unsigned long int yylno = yyrline[yyrule];
779 int yynrhs = yyr2[yyrule];
780 int yyi;
781 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
782 yyrule - 1, yylno);
783 /* The symbols being reduced. */
784 for (yyi = 0; yyi < yynrhs; yyi++)
785 {
786 YYFPRINTF (stderr, " $%d = ", yyi + 1);
787 yy_symbol_print (stderr,
788 yystos[yyssp[yyi + 1 - yynrhs]],
789 &]b4_rhs_value(yynrhs, yyi + 1)[
790 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
791 b4_user_args[);
792 YYFPRINTF (stderr, "\n");
793 }
794 }
795
796 # define YY_REDUCE_PRINT(Rule) \
797 do { \
798 if (yydebug) \
799 yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
800 } while (YYID (0))
801
802 /* Nonzero means print parse trace. It is left uninitialized so that
803 multiple parsers can coexist. */
804 int yydebug;
805 #else /* !]b4_api_PREFIX[DEBUG */
806 # define YYDPRINTF(Args)
807 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
808 # define YY_STACK_PRINT(Bottom, Top)
809 # define YY_REDUCE_PRINT(Rule)
810 #endif /* !]b4_api_PREFIX[DEBUG */
811
812
813 /* YYINITDEPTH -- initial size of the parser's stacks. */
814 #ifndef YYINITDEPTH
815 # define YYINITDEPTH ]b4_stack_depth_init[
816 #endif
817
818 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
819 if the built-in stack extension method is used).
820
821 Do not make this value too large; the results are undefined if
822 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
823 evaluated with infinite-precision integer arithmetic. */
824
825 #ifndef YYMAXDEPTH
826 # define YYMAXDEPTH ]b4_stack_depth_max[
827 #endif]b4_lac_if([[
828
829 /* Given a state stack such that *YYBOTTOM is its bottom, such that
830 *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty
831 stack, and such that *YYCAPACITY is the maximum number of elements it
832 can hold without a reallocation, make sure there is enough room to
833 store YYADD more elements. If not, allocate a new stack using
834 YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM,
835 *YYTOP, and *YYCAPACITY to reflect the new capacity and memory
836 location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack
837 using YYSTACK_FREE. Return 0 if successful or if no reallocation is
838 required. Return 1 if memory is exhausted. */
839 static int
840 yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
841 #if ]b4_api_PREFIX[DEBUG
842 char const *yydebug_prefix,
843 char const *yydebug_suffix,
844 #endif
845 yytype_int16 **yybottom,
846 yytype_int16 *yybottom_no_free,
847 yytype_int16 **yytop, yytype_int16 *yytop_empty)
848 {
849 YYSIZE_T yysize_old =
850 *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1;
851 YYSIZE_T yysize_new = yysize_old + yyadd;
852 if (*yycapacity < yysize_new)
853 {
854 YYSIZE_T yyalloc = 2 * yysize_new;
855 yytype_int16 *yybottom_new;
856 /* Use YYMAXDEPTH for maximum stack size given that the stack
857 should never need to grow larger than the main state stack
858 needs to grow without LAC. */
859 if (YYMAXDEPTH < yysize_new)
860 {
861 YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix,
862 yydebug_suffix));
863 return 1;
864 }
865 if (YYMAXDEPTH < yyalloc)
866 yyalloc = YYMAXDEPTH;
867 yybottom_new =
868 (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new);
869 if (!yybottom_new)
870 {
871 YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix,
872 yydebug_suffix));
873 return 1;
874 }
875 if (*yytop != yytop_empty)
876 {
877 YYCOPY (yybottom_new, *yybottom, yysize_old);
878 *yytop = yybottom_new + (yysize_old - 1);
879 }
880 if (*yybottom != yybottom_no_free)
881 YYSTACK_FREE (*yybottom);
882 *yybottom = yybottom_new;
883 *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]),
884 [full], [[
885 YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix,
886 (unsigned long int) yyalloc, yydebug_suffix));]])[
887 }
888 return 0;
889 }
890
891 /* Establish the initial context for the current lookahead if no initial
892 context is currently established.
893
894 We define a context as a snapshot of the parser stacks. We define
895 the initial context for a lookahead as the context in which the
896 parser initially examines that lookahead in order to select a
897 syntactic action. Thus, if the lookahead eventually proves
898 syntactically unacceptable (possibly in a later context reached via a
899 series of reductions), the initial context can be used to determine
900 the exact set of tokens that would be syntactically acceptable in the
901 lookahead's place. Moreover, it is the context after which any
902 further semantic actions would be erroneous because they would be
903 determined by a syntactically unacceptable token.
904
905 YY_LAC_ESTABLISH should be invoked when a reduction is about to be
906 performed in an inconsistent state (which, for the purposes of LAC,
907 includes consistent states that don't know they're consistent because
908 their default reductions have been disabled). Iff there is a
909 lookahead token, it should also be invoked before reporting a syntax
910 error. This latter case is for the sake of the debugging output.
911
912 For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as
913 follows. If no initial context is currently established for the
914 current lookahead, then check if that lookahead can eventually be
915 shifted if syntactic actions continue from the current context.
916 Report a syntax error if it cannot. */
917 #define YY_LAC_ESTABLISH \
918 do { \
919 if (!yy_lac_established) \
920 { \
921 YYDPRINTF ((stderr, \
922 "LAC: initial context established for %s\n", \
923 yytname[yytoken])); \
924 yy_lac_established = 1; \
925 { \
926 int yy_lac_status = \
927 yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \
928 if (yy_lac_status == 2) \
929 goto yyexhaustedlab; \
930 if (yy_lac_status == 1) \
931 goto yyerrlab; \
932 } \
933 } \
934 } while (YYID (0))
935
936 /* Discard any previous initial lookahead context because of Event,
937 which may be a lookahead change or an invalidation of the currently
938 established initial context for the current lookahead.
939
940 The most common example of a lookahead change is a shift. An example
941 of both cases is syntax error recovery. That is, a syntax error
942 occurs when the lookahead is syntactically erroneous for the
943 currently established initial context, so error recovery manipulates
944 the parser stacks to try to find a new initial context in which the
945 current lookahead is syntactically acceptable. If it fails to find
946 such a context, it discards the lookahead. */
947 #if ]b4_api_PREFIX[DEBUG
948 # define YY_LAC_DISCARD(Event) \
949 do { \
950 if (yy_lac_established) \
951 { \
952 if (yydebug) \
953 YYFPRINTF (stderr, "LAC: initial context discarded due to " \
954 Event "\n"); \
955 yy_lac_established = 0; \
956 } \
957 } while (YYID (0))
958 #else
959 # define YY_LAC_DISCARD(Event) yy_lac_established = 0
960 #endif
961
962 /* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can
963 eventually (after perhaps some reductions) be shifted, return 1 if
964 not, or return 2 if memory is exhausted. As preconditions and
965 postconditions: *YYES_CAPACITY is the allocated size of the array to
966 which *YYES points, and either *YYES = YYESA or *YYES points to an
967 array allocated with YYSTACK_ALLOC. yy_lac may overwrite the
968 contents of either array, alter *YYES and *YYES_CAPACITY, and free
969 any old *YYES other than YYESA. */
970 static int
971 yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
972 YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
973 {
974 yytype_int16 *yyes_prev = yyssp;
975 yytype_int16 *yyesp = yyes_prev;
976 YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken]));
977 if (yytoken == YYUNDEFTOK)
978 {
979 YYDPRINTF ((stderr, " Always Err\n"));
980 return 1;
981 }
982 while (1)
983 {
984 int yyrule = yypact[*yyesp];
985 if (yypact_value_is_default (yyrule)
986 || (yyrule += yytoken) < 0 || YYLAST < yyrule
987 || yycheck[yyrule] != yytoken)
988 {
989 yyrule = yydefact[*yyesp];
990 if (yyrule == 0)
991 {
992 YYDPRINTF ((stderr, " Err\n"));
993 return 1;
994 }
995 }
996 else
997 {
998 yyrule = yytable[yyrule];
999 if (yytable_value_is_error (yyrule))
1000 {
1001 YYDPRINTF ((stderr, " Err\n"));
1002 return 1;
1003 }
1004 if (0 < yyrule)
1005 {
1006 YYDPRINTF ((stderr, " S%d\n", yyrule));
1007 return 0;
1008 }
1009 yyrule = -yyrule;
1010 }
1011 {
1012 YYSIZE_T yylen = yyr2[yyrule];
1013 YYDPRINTF ((stderr, " R%d", yyrule - 1));
1014 if (yyesp != yyes_prev)
1015 {
1016 YYSIZE_T yysize = yyesp - *yyes + 1;
1017 if (yylen < yysize)
1018 {
1019 yyesp -= yylen;
1020 yylen = 0;
1021 }
1022 else
1023 {
1024 yylen -= yysize;
1025 yyesp = yyes_prev;
1026 }
1027 }
1028 if (yylen)
1029 yyesp = yyes_prev -= yylen;
1030 }
1031 {
1032 int yystate;
1033 {
1034 int yylhs = yyr1[yyrule] - YYNTOKENS;
1035 yystate = yypgoto[yylhs] + *yyesp;
1036 if (yystate < 0 || YYLAST < yystate
1037 || yycheck[yystate] != *yyesp)
1038 yystate = yydefgoto[yylhs];
1039 else
1040 yystate = yytable[yystate];
1041 }
1042 if (yyesp == yyes_prev)
1043 {
1044 yyesp = *yyes;
1045 *yyesp = yystate;
1046 }
1047 else
1048 {
1049 if (yy_lac_stack_realloc (yyes_capacity, 1,
1050 #if ]b4_api_PREFIX[DEBUG
1051 " (", ")",
1052 #endif
1053 yyes, yyesa, &yyesp, yyes_prev))
1054 {
1055 YYDPRINTF ((stderr, "\n"));
1056 return 2;
1057 }
1058 *++yyesp = yystate;
1059 }
1060 YYDPRINTF ((stderr, " G%d", yystate));
1061 }
1062 }
1063 }]])[
1064
1065
1066 #if YYERROR_VERBOSE
1067
1068 # ifndef yystrlen
1069 # if defined __GLIBC__ && defined _STRING_H
1070 # define yystrlen strlen
1071 # else
1072 /* Return the length of YYSTR. */
1073 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
1074 [[const char *yystr], [yystr]])[
1075 {
1076 YYSIZE_T yylen;
1077 for (yylen = 0; yystr[yylen]; yylen++)
1078 continue;
1079 return yylen;
1080 }
1081 # endif
1082 # endif
1083
1084 # ifndef yystpcpy
1085 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
1086 # define yystpcpy stpcpy
1087 # else
1088 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
1089 YYDEST. */
1090 ]b4_c_function_def([yystpcpy], [static char *],
1091 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
1092 {
1093 char *yyd = yydest;
1094 const char *yys = yysrc;
1095
1096 while ((*yyd++ = *yys++) != '\0')
1097 continue;
1098
1099 return yyd - 1;
1100 }
1101 # endif
1102 # endif
1103
1104 # ifndef yytnamerr
1105 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
1106 quotes and backslashes, so that it's suitable for yyerror. The
1107 heuristic is that double-quoting is unnecessary unless the string
1108 contains an apostrophe, a comma, or backslash (other than
1109 backslash-backslash). YYSTR is taken from yytname. If YYRES is
1110 null, do not copy; instead, return the length of what the result
1111 would have been. */
1112 static YYSIZE_T
1113 yytnamerr (char *yyres, const char *yystr)
1114 {
1115 if (*yystr == '"')
1116 {
1117 YYSIZE_T yyn = 0;
1118 char const *yyp = yystr;
1119
1120 for (;;)
1121 switch (*++yyp)
1122 {
1123 case '\'':
1124 case ',':
1125 goto do_not_strip_quotes;
1126
1127 case '\\':
1128 if (*++yyp != '\\')
1129 goto do_not_strip_quotes;
1130 /* Fall through. */
1131 default:
1132 if (yyres)
1133 yyres[yyn] = *yyp;
1134 yyn++;
1135 break;
1136
1137 case '"':
1138 if (yyres)
1139 yyres[yyn] = '\0';
1140 return yyn;
1141 }
1142 do_not_strip_quotes: ;
1143 }
1144
1145 if (! yyres)
1146 return yystrlen (yystr);
1147
1148 return yystpcpy (yyres, yystr) - yyres;
1149 }
1150 # endif
1151
1152 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
1153 about the unexpected token YYTOKEN for the state stack whose top is
1154 YYSSP.]b4_lac_if([[ In order to see if a particular token T is a
1155 valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[
1156
1157 Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is
1158 not large enough to hold the message. In that case, also set
1159 *YYMSG_ALLOC to the required number of bytes. Return 2 if the
1160 required number of bytes is too large to store]b4_lac_if([[ or if
1161 yy_lac returned 2]])[. */
1162 static int
1163 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
1164 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
1165 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
1166 {
1167 YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
1168 YYSIZE_T yysize = yysize0;
1169 YYSIZE_T yysize1;
1170 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
1171 /* Internationalized format string. */
1172 const char *yyformat = YY_NULL;
1173 /* Arguments of yyformat. */
1174 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
1175 /* Number of reported tokens (one for the "unexpected", one per
1176 "expected"). */
1177 int yycount = 0;
1178
1179 /* There are many possibilities here to consider:
1180 - Assume YYFAIL is not used. It's too flawed to consider. See
1181 <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
1182 for details. YYERROR is fine as it does not invoke this
1183 function.
1184 - If this state is a consistent state with a default action, then
1185 the only way this function was invoked is if the default action
1186 is an error action. In that case, don't check for expected
1187 tokens because there are none.
1188 - The only way there can be no lookahead present (in yychar) is if
1189 this state is a consistent state with a default action. Thus,
1190 detecting the absence of a lookahead is sufficient to determine
1191 that there is no unexpected or expected token to report. In that
1192 case, just report a simple "syntax error".
1193 - Don't assume there isn't a lookahead just because this state is a
1194 consistent state with a default action. There might have been a
1195 previous inconsistent state, consistent state with a non-default
1196 action, or user semantic action that manipulated yychar.]b4_lac_if([[
1197 In the first two cases, it might appear that the current syntax
1198 error should have been detected in the previous state when yy_lac
1199 was invoked. However, at that time, there might have been a
1200 different syntax error that discarded a different initial context
1201 during error recovery, leaving behind the current lookahead.]], [[
1202 - Of course, the expected token list depends on states to have
1203 correct lookahead information, and it depends on the parser not
1204 to perform extra reductions after fetching a lookahead from the
1205 scanner and before detecting a syntax error. Thus, state merging
1206 (from LALR or IELR) and default reductions corrupt the expected
1207 token list. However, the list is correct for canonical LR with
1208 one exception: it will still contain any token that will not be
1209 accepted due to an error action in a later state.]])[
1210 */
1211 if (yytoken != YYEMPTY)
1212 {
1213 int yyn = yypact[*yyssp];]b4_lac_if([[
1214 YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[
1215 yyarg[yycount++] = yytname[yytoken];
1216 if (!yypact_value_is_default (yyn))
1217 {]b4_lac_if([], [[
1218 /* Start YYX at -YYN if negative to avoid negative indexes in
1219 YYCHECK. In other words, skip the first -YYN actions for
1220 this state because they are default actions. */
1221 int yyxbegin = yyn < 0 ? -yyn : 0;
1222 /* Stay within bounds of both yycheck and yytname. */
1223 int yychecklim = YYLAST - yyn + 1;
1224 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[
1225 int yyx;]b4_lac_if([[
1226
1227 for (yyx = 0; yyx < YYNTOKENS; ++yyx)
1228 if (yyx != YYTERROR && yyx != YYUNDEFTOK)
1229 {
1230 {
1231 int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity,
1232 yyssp, yyx);
1233 if (yy_lac_status == 2)
1234 return 2;
1235 if (yy_lac_status == 1)
1236 continue;
1237 }]], [[
1238
1239 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
1240 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
1241 && !yytable_value_is_error (yytable[yyx + yyn]))
1242 {]])[
1243 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
1244 {
1245 yycount = 1;
1246 yysize = yysize0;
1247 break;
1248 }
1249 yyarg[yycount++] = yytname[yyx];
1250 yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
1251 if (! (yysize <= yysize1
1252 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1253 return 2;
1254 yysize = yysize1;
1255 }
1256 }]b4_lac_if([[
1257 # if ]b4_api_PREFIX[DEBUG
1258 else if (yydebug)
1259 YYFPRINTF (stderr, "No expected tokens.\n");
1260 # endif]])[
1261 }
1262
1263 switch (yycount)
1264 {
1265 # define YYCASE_(N, S) \
1266 case N: \
1267 yyformat = S; \
1268 break
1269 YYCASE_(0, YY_("syntax error"));
1270 YYCASE_(1, YY_("syntax error, unexpected %s"));
1271 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
1272 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
1273 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
1274 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
1275 # undef YYCASE_
1276 }
1277
1278 yysize1 = yysize + yystrlen (yyformat);
1279 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1280 return 2;
1281 yysize = yysize1;
1282
1283 if (*yymsg_alloc < yysize)
1284 {
1285 *yymsg_alloc = 2 * yysize;
1286 if (! (yysize <= *yymsg_alloc
1287 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
1288 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
1289 return 1;
1290 }
1291
1292 /* Avoid sprintf, as that infringes on the user's name space.
1293 Don't have undefined behavior even if the translation
1294 produced a string with the wrong number of "%s"s. */
1295 {
1296 char *yyp = *yymsg;
1297 int yyi = 0;
1298 while ((*yyp = *yyformat) != '\0')
1299 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1300 {
1301 yyp += yytnamerr (yyp, yyarg[yyi++]);
1302 yyformat += 2;
1303 }
1304 else
1305 {
1306 yyp++;
1307 yyformat++;
1308 }
1309 }
1310 return 0;
1311 }
1312 #endif /* YYERROR_VERBOSE */
1313
1314 ]b4_yydestruct_generate([b4_c_function_def])[
1315
1316 ]b4_pure_if([], [
1317
1318 b4_declare_scanner_communication_variables])[]b4_push_if([[
1319
1320 struct yypstate
1321 {]b4_declare_parser_state_variables[
1322 /* Used to determine if this is the first time this instance has
1323 been used. */
1324 int yynew;
1325 };]b4_pure_if([], [[
1326
1327 static char yypstate_allocated = 0;]])b4_pull_if([
1328
1329 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1330 {
1331 return yypull_parse (YY_NULL]m4_ifset([b4_parse_param],
1332 [[, ]b4_c_args(b4_parse_param)])[);
1333 }
1334
1335 ]b4_c_function_def([[yypull_parse]], [[int]],
1336 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1337 b4_parse_param]))[
1338 {
1339 int yystatus;
1340 yypstate *yyps_local;]b4_pure_if([[
1341 int yychar;
1342 YYSTYPE yylval;]b4_locations_if([[
1343 YYLTYPE yylloc;]])])[
1344 if (yyps)
1345 yyps_local = yyps;
1346 else
1347 {
1348 yyps_local = yypstate_new ();
1349 if (!yyps_local)
1350 {]b4_pure_if([[
1351 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1352 if (!yypstate_allocated)
1353 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1354 return 2;
1355 }
1356 }
1357 do {
1358 yychar = YYLEX;
1359 yystatus =
1360 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1361 } while (yystatus == YYPUSH_MORE);
1362 if (!yyps)
1363 yypstate_delete (yyps_local);
1364 return yystatus;
1365 }]])[
1366
1367 /* Initialize the parser data structure. */
1368 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1369 {
1370 yypstate *yyps;]b4_pure_if([], [[
1371 if (yypstate_allocated)
1372 return YY_NULL;]])[
1373 yyps = (yypstate *) malloc (sizeof *yyps);
1374 if (!yyps)
1375 return YY_NULL;
1376 yyps->yynew = 1;]b4_pure_if([], [[
1377 yypstate_allocated = 1;]])[
1378 return yyps;
1379 }
1380
1381 ]b4_c_function_def([[yypstate_delete]], [[void]],
1382 [[[yypstate *yyps]], [[yyps]]])[
1383 {
1384 #ifndef yyoverflow
1385 /* If the stack was reallocated but the parse did not complete, then the
1386 stack still needs to be freed. */
1387 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1388 YYSTACK_FREE (yyps->yyss);
1389 #endif]b4_lac_if([[
1390 if (!yyps->yynew && yyps->yyes != yyps->yyesa)
1391 YYSTACK_FREE (yyps->yyes);]])[
1392 free (yyps);]b4_pure_if([], [[
1393 yypstate_allocated = 0;]])[
1394 }
1395 ]b4_pure_if([[
1396 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1397 #define yystate yyps->yystate
1398 #define yyerrstatus yyps->yyerrstatus
1399 #define yyssa yyps->yyssa
1400 #define yyss yyps->yyss
1401 #define yyssp yyps->yyssp
1402 #define yyvsa yyps->yyvsa
1403 #define yyvs yyps->yyvs
1404 #define yyvsp yyps->yyvsp]b4_locations_if([[
1405 #define yylsa yyps->yylsa
1406 #define yyls yyps->yyls
1407 #define yylsp yyps->yylsp
1408 #define yyerror_range yyps->yyerror_range]])[
1409 #define yystacksize yyps->yystacksize]b4_lac_if([[
1410 #define yyesa yyps->yyesa
1411 #define yyes yyps->yyes
1412 #define yyes_capacity yyps->yyes_capacity]])[
1413
1414
1415 /*---------------.
1416 | yypush_parse. |
1417 `---------------*/
1418
1419 ]b4_c_function_def([[yypush_parse]], [[int]],
1420 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1421 [[[int yypushed_char]], [[yypushed_char]]],
1422 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1423 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1424 b4_parse_param]))], [[
1425
1426
1427 /*----------.
1428 | yyparse. |
1429 `----------*/
1430
1431 #ifdef YYPARSE_PARAM
1432 ]b4_c_function_def([yyparse], [int],
1433 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1434 #else /* ! YYPARSE_PARAM */
1435 ]b4_c_function_def([yyparse], [int], b4_parse_param)[
1436 #endif]])[
1437 {]b4_pure_if([b4_declare_scanner_communication_variables
1438 ])b4_push_if([b4_pure_if([], [[
1439 int yypushed_char = yychar;
1440 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1441 YYLTYPE yypushed_loc = yylloc;]])
1442 ])],
1443 [b4_declare_parser_state_variables
1444 ])b4_lac_if([[
1445 int yy_lac_established = 0;]])[
1446 int yyn;
1447 int yyresult;
1448 /* Lookahead token as an internal (translated) token number. */
1449 int yytoken;
1450 /* The variables used to return semantic value and location from the
1451 action routines. */
1452 YYSTYPE yyval;]b4_locations_if([[
1453 YYLTYPE yyloc;]])[
1454
1455 #if YYERROR_VERBOSE
1456 /* Buffer for error messages, and its allocated size. */
1457 char yymsgbuf[128];
1458 char *yymsg = yymsgbuf;
1459 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1460 #endif
1461
1462 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1463
1464 /* The number of symbols on the RHS of the reduced rule.
1465 Keep to zero when no symbol should be popped. */
1466 int yylen = 0;]b4_push_if([[
1467
1468 if (!yyps->yynew)
1469 {
1470 yyn = yypact[yystate];
1471 goto yyread_pushed_token;
1472 }]])[
1473
1474 yytoken = 0;
1475 yyss = yyssa;
1476 yyvs = yyvsa;]b4_locations_if([[
1477 yyls = yylsa;]])[
1478 yystacksize = YYINITDEPTH;]b4_lac_if([[
1479
1480 yyes = yyesa;
1481 yyes_capacity = sizeof yyesa / sizeof *yyes;
1482 if (YYMAXDEPTH < yyes_capacity)
1483 yyes_capacity = YYMAXDEPTH;]])[
1484
1485 YYDPRINTF ((stderr, "Starting parse\n"));
1486
1487 yystate = 0;
1488 yyerrstatus = 0;
1489 yynerrs = 0;
1490 yychar = YYEMPTY; /* Cause a token to be read. */
1491
1492 /* Initialize stack pointers.
1493 Waste one element of value and location stack
1494 so that they stay on the same level as the state stack.
1495 The wasted elements are never initialized. */
1496 yyssp = yyss;
1497 yyvsp = yyvs;]b4_locations_if([[
1498 yylsp = yyls;
1499
1500 #if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
1501 /* Initialize the default location before parsing starts. */
1502 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1503 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1504 #endif]])
1505 m4_ifdef([b4_initial_action],[
1506 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1507 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1508 /* User initialization code. */
1509 b4_user_initial_action
1510 m4_popdef([b4_dollar_dollar])dnl
1511 m4_popdef([b4_at_dollar])])dnl
1512 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1513 ]])dnl
1514 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1515 ]])[
1516 goto yysetstate;
1517
1518 /*------------------------------------------------------------.
1519 | yynewstate -- Push a new state, which is found in yystate. |
1520 `------------------------------------------------------------*/
1521 yynewstate:
1522 /* In all cases, when you get here, the value and location stacks
1523 have just been pushed. So pushing a state here evens the stacks. */
1524 yyssp++;
1525
1526 yysetstate:
1527 *yyssp = yystate;
1528
1529 if (yyss + yystacksize - 1 <= yyssp)
1530 {
1531 /* Get the current used size of the three stacks, in elements. */
1532 YYSIZE_T yysize = yyssp - yyss + 1;
1533
1534 #ifdef yyoverflow
1535 {
1536 /* Give user a chance to reallocate the stack. Use copies of
1537 these so that the &'s don't force the real ones into
1538 memory. */
1539 YYSTYPE *yyvs1 = yyvs;
1540 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1541 YYLTYPE *yyls1 = yyls;])[
1542
1543 /* Each stack pointer address is followed by the size of the
1544 data in use in that stack, in bytes. This used to be a
1545 conditional around just the two extra args, but that might
1546 be undefined if yyoverflow is a macro. */
1547 yyoverflow (YY_("memory exhausted"),
1548 &yyss1, yysize * sizeof (*yyssp),
1549 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1550 &yyls1, yysize * sizeof (*yylsp),])[
1551 &yystacksize);
1552 ]b4_locations_if([
1553 yyls = yyls1;])[
1554 yyss = yyss1;
1555 yyvs = yyvs1;
1556 }
1557 #else /* no yyoverflow */
1558 # ifndef YYSTACK_RELOCATE
1559 goto yyexhaustedlab;
1560 # else
1561 /* Extend the stack our own way. */
1562 if (YYMAXDEPTH <= yystacksize)
1563 goto yyexhaustedlab;
1564 yystacksize *= 2;
1565 if (YYMAXDEPTH < yystacksize)
1566 yystacksize = YYMAXDEPTH;
1567
1568 {
1569 yytype_int16 *yyss1 = yyss;
1570 union yyalloc *yyptr =
1571 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1572 if (! yyptr)
1573 goto yyexhaustedlab;
1574 YYSTACK_RELOCATE (yyss_alloc, yyss);
1575 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1576 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1577 # undef YYSTACK_RELOCATE
1578 if (yyss1 != yyssa)
1579 YYSTACK_FREE (yyss1);
1580 }
1581 # endif
1582 #endif /* no yyoverflow */
1583
1584 yyssp = yyss + yysize - 1;
1585 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1586 yylsp = yyls + yysize - 1;])[
1587
1588 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1589 (unsigned long int) yystacksize));
1590
1591 if (yyss + yystacksize - 1 <= yyssp)
1592 YYABORT;
1593 }
1594
1595 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1596
1597 if (yystate == YYFINAL)
1598 YYACCEPT;
1599
1600 goto yybackup;
1601
1602 /*-----------.
1603 | yybackup. |
1604 `-----------*/
1605 yybackup:
1606
1607 /* Do appropriate processing given the current state. Read a
1608 lookahead token if we need one and don't already have one. */
1609
1610 /* First try to decide what to do without reference to lookahead token. */
1611 yyn = yypact[yystate];
1612 if (yypact_value_is_default (yyn))
1613 goto yydefault;
1614
1615 /* Not known => get a lookahead token if don't already have one. */
1616
1617 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1618 if (yychar == YYEMPTY)
1619 {]b4_push_if([[
1620 if (!yyps->yynew)
1621 {]b4_use_push_for_pull_if([], [[
1622 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1623 yyresult = YYPUSH_MORE;
1624 goto yypushreturn;
1625 }
1626 yyps->yynew = 0;]b4_pure_if([], [[
1627 /* Restoring the pushed token is only necessary for the first
1628 yypush_parse invocation since subsequent invocations don't overwrite
1629 it before jumping to yyread_pushed_token. */
1630 yychar = yypushed_char;
1631 yylval = yypushed_val;]b4_locations_if([[
1632 yylloc = yypushed_loc;]])])[
1633 yyread_pushed_token:]])[
1634 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1635 yychar = yypushed_char;
1636 if (yypushed_val)
1637 yylval = *yypushed_val;]b4_locations_if([[
1638 if (yypushed_loc)
1639 yylloc = *yypushed_loc;]])])], [[
1640 yychar = YYLEX;]])[
1641 }
1642
1643 if (yychar <= YYEOF)
1644 {
1645 yychar = yytoken = YYEOF;
1646 YYDPRINTF ((stderr, "Now at end of input.\n"));
1647 }
1648 else
1649 {
1650 yytoken = YYTRANSLATE (yychar);
1651 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1652 }
1653
1654 /* If the proper action on seeing token YYTOKEN is to reduce or to
1655 detect an error, take that action. */
1656 yyn += yytoken;
1657 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[
1658 {
1659 YY_LAC_ESTABLISH;
1660 goto yydefault;
1661 }]], [[
1662 goto yydefault;]])[
1663 yyn = yytable[yyn];
1664 if (yyn <= 0)
1665 {
1666 if (yytable_value_is_error (yyn))
1667 goto yyerrlab;]b4_lac_if([[
1668 YY_LAC_ESTABLISH;]])[
1669 yyn = -yyn;
1670 goto yyreduce;
1671 }
1672
1673 /* Count tokens shifted since error; after three, turn off error
1674 status. */
1675 if (yyerrstatus)
1676 yyerrstatus--;
1677
1678 /* Shift the lookahead token. */
1679 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1680
1681 /* Discard the shifted token. */
1682 yychar = YYEMPTY;]b4_lac_if([[
1683 YY_LAC_DISCARD ("shift");]])[
1684
1685 yystate = yyn;
1686 *++yyvsp = yylval;
1687 ]b4_locations_if([ *++yylsp = yylloc;])[
1688 goto yynewstate;
1689
1690
1691 /*-----------------------------------------------------------.
1692 | yydefault -- do the default action for the current state. |
1693 `-----------------------------------------------------------*/
1694 yydefault:
1695 yyn = yydefact[yystate];
1696 if (yyn == 0)
1697 goto yyerrlab;
1698 goto yyreduce;
1699
1700
1701 /*-----------------------------.
1702 | yyreduce -- Do a reduction. |
1703 `-----------------------------*/
1704 yyreduce:
1705 /* yyn is the number of a rule to reduce with. */
1706 yylen = yyr2[yyn];
1707
1708 /* If YYLEN is nonzero, implement the default value of the action:
1709 `$$ = $1'.
1710
1711 Otherwise, the following line sets YYVAL to garbage.
1712 This behavior is undocumented and Bison
1713 users should not rely upon it. Assigning to YYVAL
1714 unconditionally makes the parser a bit smaller, and it avoids a
1715 GCC warning that YYVAL may be used uninitialized. */
1716 yyval = yyvsp[1-yylen];
1717
1718 ]b4_locations_if(
1719 [[ /* Default location. */
1720 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1721 YY_REDUCE_PRINT (yyn);]b4_lac_if([[
1722 {
1723 int yychar_backup = yychar;
1724 switch (yyn)
1725 {
1726 ]b4_user_actions[
1727 default: break;
1728 }
1729 if (yychar_backup != yychar)
1730 YY_LAC_DISCARD ("yychar change");
1731 }]], [[
1732 switch (yyn)
1733 {
1734 ]b4_user_actions[
1735 default: break;
1736 }]])[
1737 /* User semantic actions sometimes alter yychar, and that requires
1738 that yytoken be updated with the new translation. We take the
1739 approach of translating immediately before every use of yytoken.
1740 One alternative is translating here after every semantic action,
1741 but that translation would be missed if the semantic action invokes
1742 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1743 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
1744 incorrect destructor might then be invoked immediately. In the
1745 case of YYERROR or YYBACKUP, subsequent parser actions might lead
1746 to an incorrect destructor call or verbose syntax error message
1747 before the lookahead is translated. */
1748 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1749
1750 YYPOPSTACK (yylen);
1751 yylen = 0;
1752 YY_STACK_PRINT (yyss, yyssp);
1753
1754 *++yyvsp = yyval;]b4_locations_if([
1755 *++yylsp = yyloc;])[
1756
1757 /* Now `shift' the result of the reduction. Determine what state
1758 that goes to, based on the state we popped back to and the rule
1759 number reduced by. */
1760
1761 yyn = yyr1[yyn];
1762
1763 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1764 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1765 yystate = yytable[yystate];
1766 else
1767 yystate = yydefgoto[yyn - YYNTOKENS];
1768
1769 goto yynewstate;
1770
1771
1772 /*------------------------------------.
1773 | yyerrlab -- here on detecting error |
1774 `------------------------------------*/
1775 yyerrlab:
1776 /* Make sure we have latest lookahead translation. See comments at
1777 user semantic actions for why this is necessary. */
1778 yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
1779
1780 /* If not already recovering from an error, report this error. */
1781 if (!yyerrstatus)
1782 {
1783 ++yynerrs;
1784 #if ! YYERROR_VERBOSE
1785 yyerror (]b4_yyerror_args[YY_("syntax error"));
1786 #else
1787 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[
1788 yyesa, &yyes, &yyes_capacity, \]])[
1789 yyssp, yytoken)
1790 {
1791 char const *yymsgp = YY_("syntax error");
1792 int yysyntax_error_status;]b4_lac_if([[
1793 if (yychar != YYEMPTY)
1794 YY_LAC_ESTABLISH;]])[
1795 yysyntax_error_status = YYSYNTAX_ERROR;
1796 if (yysyntax_error_status == 0)
1797 yymsgp = yymsg;
1798 else if (yysyntax_error_status == 1)
1799 {
1800 if (yymsg != yymsgbuf)
1801 YYSTACK_FREE (yymsg);
1802 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1803 if (!yymsg)
1804 {
1805 yymsg = yymsgbuf;
1806 yymsg_alloc = sizeof yymsgbuf;
1807 yysyntax_error_status = 2;
1808 }
1809 else
1810 {
1811 yysyntax_error_status = YYSYNTAX_ERROR;
1812 yymsgp = yymsg;
1813 }
1814 }
1815 yyerror (]b4_yyerror_args[yymsgp);
1816 if (yysyntax_error_status == 2)
1817 goto yyexhaustedlab;
1818 }
1819 # undef YYSYNTAX_ERROR
1820 #endif
1821 }
1822
1823 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
1824
1825 if (yyerrstatus == 3)
1826 {
1827 /* If just tried and failed to reuse lookahead token after an
1828 error, discard it. */
1829
1830 if (yychar <= YYEOF)
1831 {
1832 /* Return failure if at end of input. */
1833 if (yychar == YYEOF)
1834 YYABORT;
1835 }
1836 else
1837 {
1838 yydestruct ("Error: discarding",
1839 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1840 yychar = YYEMPTY;
1841 }
1842 }
1843
1844 /* Else will try to reuse lookahead token after shifting the error
1845 token. */
1846 goto yyerrlab1;
1847
1848
1849 /*---------------------------------------------------.
1850 | yyerrorlab -- error raised explicitly by YYERROR. |
1851 `---------------------------------------------------*/
1852 yyerrorlab:
1853
1854 /* Pacify compilers like GCC when the user code never invokes
1855 YYERROR and the label yyerrorlab therefore never appears in user
1856 code. */
1857 if (/*CONSTCOND*/ 0)
1858 goto yyerrorlab;
1859
1860 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
1861 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1862 this YYERROR. */
1863 YYPOPSTACK (yylen);
1864 yylen = 0;
1865 YY_STACK_PRINT (yyss, yyssp);
1866 yystate = *yyssp;
1867 goto yyerrlab1;
1868
1869
1870 /*-------------------------------------------------------------.
1871 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1872 `-------------------------------------------------------------*/
1873 yyerrlab1:
1874 yyerrstatus = 3; /* Each real token shifted decrements this. */
1875
1876 for (;;)
1877 {
1878 yyn = yypact[yystate];
1879 if (!yypact_value_is_default (yyn))
1880 {
1881 yyn += YYTERROR;
1882 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1883 {
1884 yyn = yytable[yyn];
1885 if (0 < yyn)
1886 break;
1887 }
1888 }
1889
1890 /* Pop the current state because it cannot handle the error token. */
1891 if (yyssp == yyss)
1892 YYABORT;
1893
1894 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
1895 yydestruct ("Error: popping",
1896 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1897 YYPOPSTACK (1);
1898 yystate = *yyssp;
1899 YY_STACK_PRINT (yyss, yyssp);
1900 }]b4_lac_if([[
1901
1902 /* If the stack popping above didn't lose the initial context for the
1903 current lookahead token, the shift below will for sure. */
1904 YY_LAC_DISCARD ("error recovery");]])[
1905
1906 *++yyvsp = yylval;
1907 ]b4_locations_if([[
1908 yyerror_range[2] = yylloc;
1909 /* Using YYLLOC is tempting, but would change the location of
1910 the lookahead. YYLOC is available though. */
1911 YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1912 *++yylsp = yyloc;]])[
1913
1914 /* Shift the error token. */
1915 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1916
1917 yystate = yyn;
1918 goto yynewstate;
1919
1920
1921 /*-------------------------------------.
1922 | yyacceptlab -- YYACCEPT comes here. |
1923 `-------------------------------------*/
1924 yyacceptlab:
1925 yyresult = 0;
1926 goto yyreturn;
1927
1928 /*-----------------------------------.
1929 | yyabortlab -- YYABORT comes here. |
1930 `-----------------------------------*/
1931 yyabortlab:
1932 yyresult = 1;
1933 goto yyreturn;
1934
1935 #if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[
1936 /*-------------------------------------------------.
1937 | yyexhaustedlab -- memory exhaustion comes here. |
1938 `-------------------------------------------------*/
1939 yyexhaustedlab:
1940 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1941 yyresult = 2;
1942 /* Fall through. */
1943 #endif
1944
1945 yyreturn:
1946 if (yychar != YYEMPTY)
1947 {
1948 /* Make sure we have latest lookahead translation. See comments at
1949 user semantic actions for why this is necessary. */
1950 yytoken = YYTRANSLATE (yychar);
1951 yydestruct ("Cleanup: discarding lookahead",
1952 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1953 }
1954 /* Do not reclaim the symbols of the rule which action triggered
1955 this YYABORT or YYACCEPT. */
1956 YYPOPSTACK (yylen);
1957 YY_STACK_PRINT (yyss, yyssp);
1958 while (yyssp != yyss)
1959 {
1960 yydestruct ("Cleanup: popping",
1961 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1962 YYPOPSTACK (1);
1963 }
1964 #ifndef yyoverflow
1965 if (yyss != yyssa)
1966 YYSTACK_FREE (yyss);
1967 #endif]b4_lac_if([[
1968 if (yyes != yyesa)
1969 YYSTACK_FREE (yyes);]])b4_push_if([[
1970 yyps->yynew = 1;
1971
1972 yypushreturn:]])[
1973 #if YYERROR_VERBOSE
1974 if (yymsg != yymsgbuf)
1975 YYSTACK_FREE (yymsg);
1976 #endif
1977 /* Make sure YYID is used. */
1978 return YYID (yyresult);
1979 }
1980
1981 ]b4_epilogue[]dnl
1982 b4_defines_if(
1983 [@output(b4_spec_defines_file@)@
1984 b4_copyright([Bison interface for Yacc-like parsers in C])[
1985
1986 ]b4_shared_declarations[
1987 ]])dnl b4_defines_if
1988 m4_divert_pop(0)
1989 m4_popdef([b4_copyright_years])
bison