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1 -*- C -*-
2
3 # Yacc compatible skeleton for Bison
4
5 # Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation,
6 # Inc.
7
8 # This program is free software: you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation, either version 3 of the License, or
11 # (at your option) any later version.
12 #
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
17 #
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20
21 # Check the value of %define api.push-pull.
22 b4_percent_define_default([[api.push-pull]], [[pull]])
23 b4_percent_define_check_values([[[[api.push-pull]],
24 [[pull]], [[push]], [[both]]]])
25 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
26 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
27 m4_case(b4_percent_define_get([[api.push-pull]]),
28 [pull], [m4_define([b4_push_flag], [[0]])],
29 [push], [m4_define([b4_pull_flag], [[0]])])
30
31 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
32 # tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the
33 # behavior of Bison at all when push parsing is already requested.
34 b4_define_flag_if([use_push_for_pull])
35 b4_use_push_for_pull_if([
36 b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
37 [m4_define([b4_push_flag], [[1]])])])
38
39 # Check the value of %define parse.lac and friends, where LAC stands for
40 # lookahead correction.
41 b4_percent_define_default([[parse.lac]], [[none]])
42 b4_percent_define_default([[parse.lac.es-capacity-initial]], [[20]])
43 b4_percent_define_default([[parse.lac.memory-trace]], [[failures]])
44 b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]],
45 [[[[parse.lac.memory-trace]],
46 [[failures]], [[full]]]])
47 b4_define_flag_if([lac])
48 m4_define([b4_lac_flag],
49 [m4_if(b4_percent_define_get([[parse.lac]]),
50 [none], [[0]], [[1]])])
51
52 m4_include(b4_pkgdatadir/[c.m4])
53
54 ## ---------------- ##
55 ## Default values. ##
56 ## ---------------- ##
57
58 # Stack parameters.
59 m4_define_default([b4_stack_depth_max], [10000])
60 m4_define_default([b4_stack_depth_init], [200])
61
62
63 ## ------------------------ ##
64 ## Pure/impure interfaces. ##
65 ## ------------------------ ##
66
67 b4_percent_define_default([[api.pure]], [[false]])
68 b4_percent_define_check_values([[[[api.pure]],
69 [[false]], [[true]], [[]], [[full]]]])
70
71 m4_define([b4_pure_flag], [[0]])
72 m4_case(b4_percent_define_get([[api.pure]]),
73 [false], [m4_define([b4_pure_flag], [[0]])],
74 [true], [m4_define([b4_pure_flag], [[1]])],
75 [], [m4_define([b4_pure_flag], [[1]])],
76 [full], [m4_define([b4_pure_flag], [[2]])])
77
78 m4_define([b4_pure_if],
79 [m4_case(b4_pure_flag,
80 [0], [$2],
81 [1], [$1],
82 [2], [$1])])
83 [m4_fatal([invalid api.pure value: ]$1)])])
84
85 # b4_yyerror_arg_loc_if(ARG)
86 # --------------------------
87 # Expand ARG iff yyerror is to be given a location as argument.
88 m4_define([b4_yyerror_arg_loc_if],
89 [b4_locations_if([m4_case(b4_pure_flag,
90 [1], [m4_ifset([b4_parse_param], [$1])],
91 [2], [$1])])])
92
93 # b4_yyerror_args
94 # ---------------
95 # Arguments passed to yyerror: user args plus yylloc.
96 m4_define([b4_yyerror_args],
97 [b4_yyerror_arg_loc_if([&yylloc, ])dnl
98 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
99
100
101 # b4_lex_param
102 # ------------
103 # Accumulate in b4_lex_param all the yylex arguments.
104 # b4_lex_param arrives quoted twice, but we want to keep only one level.
105 m4_define([b4_lex_param],
106 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
107 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
108 m4_ifdef([b4_lex_param], b4_lex_param)))
109
110
111 ## ------------ ##
112 ## Data Types. ##
113 ## ------------ ##
114
115 # b4_int_type(MIN, MAX)
116 # ---------------------
117 # Return the smallest int type able to handle numbers ranging from
118 # MIN to MAX (included). Overwrite the version from c.m4, which
119 # uses only C89 types, so that the user can override the shorter
120 # types, and so that pre-C89 compilers are handled correctly.
121 m4_define([b4_int_type],
122 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
123 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
124
125 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
126 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
127
128 m4_eval([0 <= $1]), [1], [unsigned int],
129
130 [int])])
131
132
133 ## ----------------- ##
134 ## Semantic Values. ##
135 ## ----------------- ##
136
137
138 # b4_lhs_value([TYPE])
139 # --------------------
140 # Expansion of $<TYPE>$.
141 m4_define([b4_lhs_value],
142 [(yyval[]m4_ifval([$1], [.$1]))])
143
144
145 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
146 # --------------------------------------
147 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
148 # symbols on RHS.
149 m4_define([b4_rhs_value],
150 [(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))])
151
152
153
154 ## ----------- ##
155 ## Locations. ##
156 ## ----------- ##
157
158 # b4_lhs_location()
159 # -----------------
160 # Expansion of @$.
161 m4_define([b4_lhs_location],
162 [(yyloc)])
163
164
165 # b4_rhs_location(RULE-LENGTH, NUM)
166 # ---------------------------------
167 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
168 # on RHS.
169 m4_define([b4_rhs_location],
170 [(yylsp@{($2) - ($1)@})])
171
172
173 ## -------------- ##
174 ## Declarations. ##
175 ## -------------- ##
176
177 # b4_declare_scanner_communication_variables
178 # ------------------------------------------
179 # Declare the variables that are global, or local to YYPARSE if
180 # pure-parser.
181 m4_define([b4_declare_scanner_communication_variables], [[
182 /* The lookahead symbol. */
183 int yychar;
184
185 ]b4_pure_if([[
186 #if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
187 /* Suppress an incorrect diagnostic about yylval being uninitialized. */
188 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
189 _Pragma ("GCC diagnostic push") \
190 _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
191 _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
192 # define YY_IGNORE_MAYBE_UNINITIALIZED_END \
193 _Pragma ("GCC diagnostic pop")
194 #else
195 /* Default value used for initialization, for pacifying older GCCs
196 or non-GCC compilers. */
197 static YYSTYPE yyval_default;
198 # define YY_INITIAL_VALUE(Value) = Value
199 #endif]b4_locations_if([[
200 static YYLTYPE yyloc_default][]b4_yyloc_default[;]])])[
201 #ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
202 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
203 # define YY_IGNORE_MAYBE_UNINITIALIZED_END
204 #endif
205 #ifndef YY_INITIAL_VALUE
206 # define YY_INITIAL_VALUE(Value) /* Nothing. */
207 #endif
208
209 /* The semantic value of the lookahead symbol. */
210 YYSTYPE yylval YY_INITIAL_VALUE(yyval_default);]b4_locations_if([[
211
212 /* Location data for the lookahead symbol. */
213 YYLTYPE yylloc]b4_pure_if([ = yyloc_default], [b4_yyloc_default])[;
214 ]])b4_pure_if([], [[
215
216 /* Number of syntax errors so far. */
217 int yynerrs;]])])
218
219
220 # b4_declare_parser_state_variables
221 # ---------------------------------
222 # Declare all the variables that are needed to maintain the parser state
223 # between calls to yypush_parse.
224 m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
225 /* Number of syntax errors so far. */
226 int yynerrs;
227 ]])[
228 int yystate;
229 /* Number of tokens to shift before error messages enabled. */
230 int yyerrstatus;
231
232 /* The stacks and their tools:
233 `yyss': related to states.
234 `yyvs': related to semantic values.]b4_locations_if([[
235 `yyls': related to locations.]])[
236
237 Refer to the stacks through separate pointers, to allow yyoverflow
238 to reallocate them elsewhere. */
239
240 /* The state stack. */
241 yytype_int16 yyssa[YYINITDEPTH];
242 yytype_int16 *yyss;
243 yytype_int16 *yyssp;
244
245 /* The semantic value stack. */
246 YYSTYPE yyvsa[YYINITDEPTH];
247 YYSTYPE *yyvs;
248 YYSTYPE *yyvsp;]b4_locations_if([[
249
250 /* The location stack. */
251 YYLTYPE yylsa[YYINITDEPTH];
252 YYLTYPE *yyls;
253 YYLTYPE *yylsp;
254
255 /* The locations where the error started and ended. */
256 YYLTYPE yyerror_range[3];]])[
257
258 YYSIZE_T yystacksize;]b4_lac_if([[
259
260 yytype_int16 yyesa@{]b4_percent_define_get([[parse.lac.es-capacity-initial]])[@};
261 yytype_int16 *yyes;
262 YYSIZE_T yyes_capacity;]])])
263
264
265 # b4_declare_yyparse_push_
266 # ------------------------
267 # Declaration of yyparse (and dependencies) when using the push parser
268 # (including in pull mode).
269 m4_define([b4_declare_yyparse_push_],
270 [[#ifndef YYPUSH_MORE_DEFINED
271 # define YYPUSH_MORE_DEFINED
272 enum { YYPUSH_MORE = 4 };
273 #endif
274
275 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
276
277 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
278 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
279 [[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([,
280 [[[int pushed_char]], [[pushed_char]]],
281 [[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([,
282 [[b4_api_PREFIX[LTYPE *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,
283 b4_parse_param]))
284 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
285 [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,
286 b4_parse_param]))])
287 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
288 [[[void]], []])
289 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
290 [[b4_prefix[pstate *ps]], [[ps]]])dnl
291 ])
292
293 # b4_declare_yyparse_
294 # -------------------
295 # When not the push parser.
296 m4_define([b4_declare_yyparse_],
297 [[#ifdef YYPARSE_PARAM
298 ]b4_c_function_decl(b4_prefix[parse], [int],
299 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
300 #else /* ! YYPARSE_PARAM */
301 ]b4_c_function_decl(b4_prefix[parse], [int], b4_parse_param)[
302 #endif /* ! YYPARSE_PARAM */]dnl
303 ])
304
305
306 # b4_declare_yyparse
307 # ------------------
308 m4_define([b4_declare_yyparse],
309 [b4_push_if([b4_declare_yyparse_push_],
310 [b4_declare_yyparse_])[]dnl
311 ])
312
313
314 # b4_shared_declarations
315 # ----------------------
316 # Declaration that might either go into the header (if --defines)
317 # or open coded in the parser body.
318 m4_define([b4_shared_declarations],
319 [b4_cpp_guard_open([b4_spec_defines_file])[
320 ]b4_declare_yydebug[
321 ]b4_percent_code_get([[requires]])[
322 ]b4_token_enums_defines(b4_tokens)[
323 ]b4_declare_yylstype[
324 ]b4_declare_yyparse[
325 ]b4_percent_code_get([[provides]])[
326 ]b4_cpp_guard_close([b4_spec_defines_file])[]dnl
327 ])
328
329
330 ## -------------- ##
331 ## Output files. ##
332 ## -------------- ##
333
334 b4_output_begin([b4_parser_file_name])
335 b4_copyright([Bison implementation for Yacc-like parsers in C],
336 [1984, 1989-1990, 2000-2012])[
337
338 /* C LALR(1) parser skeleton written by Richard Stallman, by
339 simplifying the original so-called "semantic" parser. */
340
341 /* All symbols defined below should begin with yy or YY, to avoid
342 infringing on user name space. This should be done even for local
343 variables, as they might otherwise be expanded by user macros.
344 There are some unavoidable exceptions within include files to
345 define necessary library symbols; they are noted "INFRINGES ON
346 USER NAME SPACE" below. */
347
348 ]b4_identification
349 b4_percent_code_get([[top]])[]dnl
350 m4_if(b4_api_prefix, [yy], [],
351 [[/* Substitute the type names. */
352 #define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[
353 #define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[
354 ]m4_if(b4_prefix, [yy], [],
355 [[/* Substitute the variable and function names. */]b4_pull_if([[
356 #define yyparse ]b4_prefix[parse]])b4_push_if([[
357 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
358 #define yypull_parse ]b4_prefix[pull_parse]])[
359 #define yypstate_new ]b4_prefix[pstate_new
360 #define yypstate_delete ]b4_prefix[pstate_delete
361 #define yypstate ]b4_prefix[pstate]])[
362 #define yylex ]b4_prefix[lex
363 #define yyerror ]b4_prefix[error
364 #define yylval ]b4_prefix[lval
365 #define yychar ]b4_prefix[char
366 #define yydebug ]b4_prefix[debug
367 #define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
368 #define yylloc ]b4_prefix[lloc]])])[
369
370 /* Copy the first part of user declarations. */
371 ]b4_user_pre_prologue[
372
373 ]b4_null_define[
374
375 /* Enabling verbose error messages. */
376 #ifdef YYERROR_VERBOSE
377 # undef YYERROR_VERBOSE
378 # define YYERROR_VERBOSE 1
379 #else
380 # define YYERROR_VERBOSE ]b4_error_verbose_flag[
381 #endif
382
383 ]m4_ifval(m4_quote(b4_spec_defines_file),
384 [[/* In a future release of Bison, this section will be replaced
385 by #include "@basename(]b4_spec_defines_file[@)". */
386 ]])dnl
387 b4_shared_declarations[
388
389 /* Copy the second part of user declarations. */
390 ]b4_user_post_prologue
391 b4_percent_code_get[]dnl
392
393 [#ifdef short
394 # undef short
395 #endif
396
397 #ifdef YYTYPE_UINT8
398 typedef YYTYPE_UINT8 yytype_uint8;
399 #else
400 typedef unsigned char yytype_uint8;
401 #endif
402
403 #ifdef YYTYPE_INT8
404 typedef YYTYPE_INT8 yytype_int8;
405 #elif ]b4_c_modern[
406 typedef signed char yytype_int8;
407 #else
408 typedef short int yytype_int8;
409 #endif
410
411 #ifdef YYTYPE_UINT16
412 typedef YYTYPE_UINT16 yytype_uint16;
413 #else
414 typedef unsigned short int yytype_uint16;
415 #endif
416
417 #ifdef YYTYPE_INT16
418 typedef YYTYPE_INT16 yytype_int16;
419 #else
420 typedef short int yytype_int16;
421 #endif
422
423 #ifndef YYSIZE_T
424 # ifdef __SIZE_TYPE__
425 # define YYSIZE_T __SIZE_TYPE__
426 # elif defined size_t
427 # define YYSIZE_T size_t
428 # elif ! defined YYSIZE_T && ]b4_c_modern[
429 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
430 # define YYSIZE_T size_t
431 # else
432 # define YYSIZE_T unsigned int
433 # endif
434 #endif
435
436 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
437
438 #ifndef YY_
439 # if defined YYENABLE_NLS && YYENABLE_NLS
440 # if ENABLE_NLS
441 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
442 # define YY_(Msgid) dgettext ("bison-runtime", Msgid)
443 # endif
444 # endif
445 # ifndef YY_
446 # define YY_(Msgid) Msgid
447 # endif
448 #endif
449
450 /* Suppress unused-variable warnings by "using" E. */
451 #if ! defined lint || defined __GNUC__
452 # define YYUSE(E) ((void) (E))
453 #else
454 # define YYUSE(E) /* empty */
455 #endif
456
457 /* Identity function, used to suppress warnings about constant conditions. */
458 #ifndef lint
459 # define YYID(N) (N)
460 #else
461 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
462 {
463 return yyi;
464 }
465 #endif
466
467 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
468
469 /* The parser invokes alloca or malloc; define the necessary symbols. */]dnl
470 b4_push_if([], [b4_lac_if([], [[
471
472 # ifdef YYSTACK_USE_ALLOCA
473 # if YYSTACK_USE_ALLOCA
474 # ifdef __GNUC__
475 # define YYSTACK_ALLOC __builtin_alloca
476 # elif defined __BUILTIN_VA_ARG_INCR
477 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
478 # elif defined _AIX
479 # define YYSTACK_ALLOC __alloca
480 # elif defined _MSC_VER
481 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
482 # define alloca _alloca
483 # else
484 # define YYSTACK_ALLOC alloca
485 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && ]b4_c_modern[
486 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
487 /* Use EXIT_SUCCESS as a witness for stdlib.h. */
488 # ifndef EXIT_SUCCESS
489 # define EXIT_SUCCESS 0
490 # endif
491 # endif
492 # endif
493 # endif
494 # endif]])])[
495
496 # ifdef YYSTACK_ALLOC
497 /* Pacify GCC's `empty if-body' warning. */
498 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
499 # ifndef YYSTACK_ALLOC_MAXIMUM
500 /* The OS might guarantee only one guard page at the bottom of the stack,
501 and a page size can be as small as 4096 bytes. So we cannot safely
502 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
503 to allow for a few compiler-allocated temporary stack slots. */
504 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
505 # endif
506 # else
507 # define YYSTACK_ALLOC YYMALLOC
508 # define YYSTACK_FREE YYFREE
509 # ifndef YYSTACK_ALLOC_MAXIMUM
510 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
511 # endif
512 # if (defined __cplusplus && ! defined EXIT_SUCCESS \
513 && ! ((defined YYMALLOC || defined malloc) \
514 && (defined YYFREE || defined free)))
515 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
516 # ifndef EXIT_SUCCESS
517 # define EXIT_SUCCESS 0
518 # endif
519 # endif
520 # ifndef YYMALLOC
521 # define YYMALLOC malloc
522 # if ! defined malloc && ! defined EXIT_SUCCESS && ]b4_c_modern[
523 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
524 # endif
525 # endif
526 # ifndef YYFREE
527 # define YYFREE free
528 # if ! defined free && ! defined EXIT_SUCCESS && ]b4_c_modern[
529 void free (void *); /* INFRINGES ON USER NAME SPACE */
530 # endif
531 # endif
532 # endif]b4_lac_if([[
533 # define YYCOPY_NEEDED 1]])[
534 #endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[
535
536
537 #if (! defined yyoverflow \
538 && (! defined __cplusplus \
539 || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \
540 && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL)))
541
542 /* A type that is properly aligned for any stack member. */
543 union yyalloc
544 {
545 yytype_int16 yyss_alloc;
546 YYSTYPE yyvs_alloc;]b4_locations_if([
547 YYLTYPE yyls_alloc;])[
548 };
549
550 /* The size of the maximum gap between one aligned stack and the next. */
551 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
552
553 /* The size of an array large to enough to hold all stacks, each with
554 N elements. */
555 ]b4_locations_if(
556 [# define YYSTACK_BYTES(N) \
557 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
558 + 2 * YYSTACK_GAP_MAXIMUM)],
559 [# define YYSTACK_BYTES(N) \
560 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
561 + YYSTACK_GAP_MAXIMUM)])[
562
563 # define YYCOPY_NEEDED 1
564
565 /* Relocate STACK from its old location to the new one. The
566 local variables YYSIZE and YYSTACKSIZE give the old and new number of
567 elements in the stack, and YYPTR gives the new location of the
568 stack. Advance YYPTR to a properly aligned location for the next
569 stack. */
570 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
571 do \
572 { \
573 YYSIZE_T yynewbytes; \
574 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
575 Stack = &yyptr->Stack_alloc; \
576 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
577 yyptr += yynewbytes / sizeof (*yyptr); \
578 } \
579 while (YYID (0))
580
581 #endif
582
583 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED
584 /* Copy COUNT objects from SRC to DST. The source and destination do
585 not overlap. */
586 # ifndef YYCOPY
587 # if defined __GNUC__ && 1 < __GNUC__
588 # define YYCOPY(Dst, Src, Count) \
589 __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
590 # else
591 # define YYCOPY(Dst, Src, Count) \
592 do \
593 { \
594 YYSIZE_T yyi; \
595 for (yyi = 0; yyi < (Count); yyi++) \
596 (Dst)[yyi] = (Src)[yyi]; \
597 } \
598 while (YYID (0))
599 # endif
600 # endif
601 #endif /* !YYCOPY_NEEDED */
602
603 /* YYFINAL -- State number of the termination state. */
604 #define YYFINAL ]b4_final_state_number[
605 /* YYLAST -- Last index in YYTABLE. */
606 #define YYLAST ]b4_last[
607
608 /* YYNTOKENS -- Number of terminals. */
609 #define YYNTOKENS ]b4_tokens_number[
610 /* YYNNTS -- Number of nonterminals. */
611 #define YYNNTS ]b4_nterms_number[
612 /* YYNRULES -- Number of rules. */
613 #define YYNRULES ]b4_rules_number[
614 /* YYNRULES -- Number of states. */
615 #define YYNSTATES ]b4_states_number[
616
617 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
618 #define YYUNDEFTOK ]b4_undef_token_number[
619 #define YYMAXUTOK ]b4_user_token_number_max[
620
621 #define YYTRANSLATE(YYX) \
622 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
623
624 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
625 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
626 {
627 ]b4_translate[
628 };
629
630 #if ]b4_api_PREFIX[DEBUG
631 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
632 YYRHS. */
633 static const ]b4_int_type_for([b4_prhs])[ yyprhs[] =
634 {
635 ]b4_prhs[
636 };
637
638 /* YYRHS -- A `-1'-separated list of the rules' RHS. */
639 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] =
640 {
641 ]b4_rhs[
642 };
643
644 /* YYRLINE[YYN] -- source line where rule number YYN was defined. */
645 static const ]b4_int_type_for([b4_rline])[ yyrline[] =
646 {
647 ]b4_rline[
648 };
649 #endif
650
651 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
652 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
653 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
654 static const char *const yytname[] =
655 {
656 ]b4_tname[
657 };
658 #endif
659
660 # ifdef YYPRINT
661 /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
662 token YYLEX-NUM. */
663 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
664 {
665 ]b4_toknum[
666 };
667 # endif
668
669 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
670 static const ]b4_int_type_for([b4_r1])[ yyr1[] =
671 {
672 ]b4_r1[
673 };
674
675 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
676 static const ]b4_int_type_for([b4_r2])[ yyr2[] =
677 {
678 ]b4_r2[
679 };
680
681 /* YYDEFACT[STATE-NAME] -- Default reduction number in state STATE-NUM.
682 Performed when YYTABLE doesn't specify something else to do. Zero
683 means the default is an error. */
684 static const ]b4_int_type_for([b4_defact])[ yydefact[] =
685 {
686 ]b4_defact[
687 };
688
689 /* YYDEFGOTO[NTERM-NUM]. */
690 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] =
691 {
692 ]b4_defgoto[
693 };
694
695 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
696 STATE-NUM. */
697 #define YYPACT_NINF ]b4_pact_ninf[
698 static const ]b4_int_type_for([b4_pact])[ yypact[] =
699 {
700 ]b4_pact[
701 };
702
703 /* YYPGOTO[NTERM-NUM]. */
704 static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] =
705 {
706 ]b4_pgoto[
707 };
708
709 /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
710 positive, shift that token. If negative, reduce the rule which
711 number is the opposite. If YYTABLE_NINF, syntax error. */
712 #define YYTABLE_NINF ]b4_table_ninf[
713 static const ]b4_int_type_for([b4_table])[ yytable[] =
714 {
715 ]b4_table[
716 };
717
718 #define yypact_value_is_default(Yystate) \
719 ]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[
720
721 #define yytable_value_is_error(Yytable_value) \
722 ]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[
723
724 static const ]b4_int_type_for([b4_check])[ yycheck[] =
725 {
726 ]b4_check[
727 };
728
729 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
730 symbol of state STATE-NUM. */
731 static const ]b4_int_type_for([b4_stos])[ yystos[] =
732 {
733 ]b4_stos[
734 };
735
736 #define yyerrok (yyerrstatus = 0)
737 #define yyclearin (yychar = YYEMPTY)
738 #define YYEMPTY (-2)
739 #define YYEOF 0
740
741 #define YYACCEPT goto yyacceptlab
742 #define YYABORT goto yyabortlab
743 #define YYERROR goto yyerrorlab
744
745
746 /* Like YYERROR except do call yyerror. This remains here temporarily
747 to ease the transition to the new meaning of YYERROR, for GCC.
748 Once GCC version 2 has supplanted version 1, this can go. However,
749 YYFAIL appears to be in use. Nevertheless, it is formally deprecated
750 in Bison 2.4.2's NEWS entry, where a plan to phase it out is
751 discussed. */
752
753 #define YYFAIL goto yyerrlab
754 #if defined YYFAIL
755 /* This is here to suppress warnings from the GCC cpp's
756 -Wunused-macros. Normally we don't worry about that warning, but
757 some users do, and we want to make it easy for users to remove
758 YYFAIL uses, which will produce warnings from Bison 2.5. */
759 #endif
760
761 #define YYRECOVERING() (!!yyerrstatus)
762
763 #define YYBACKUP(Token, Value) \
764 do \
765 if (yychar == YYEMPTY) \
766 { \
767 yychar = (Token); \
768 yylval = (Value); \
769 YYPOPSTACK (yylen); \
770 yystate = *yyssp; \]b4_lac_if([[
771 YY_LAC_DISCARD ("YYBACKUP"); \]])[
772 goto yybackup; \
773 } \
774 else \
775 { \
776 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
777 YYERROR; \
778 } \
779 while (YYID (0))
780
781 /* Error token number */
782 #define YYTERROR 1
783 #define YYERRCODE 256
784
785 ]b4_locations_if([[
786 ]b4_yylloc_default_define[
787 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
788 ]])[
789 ]b4_yy_location_print_define[
790
791 /* YYLEX -- calling `yylex' with the right arguments. */
792 #ifdef YYLEX_PARAM
793 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
794 #else
795 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
796 #endif
797
798 /* Enable debugging if requested. */
799 #if ]b4_api_PREFIX[DEBUG
800
801 # ifndef YYFPRINTF
802 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
803 # define YYFPRINTF fprintf
804 # endif
805
806 # define YYDPRINTF(Args) \
807 do { \
808 if (yydebug) \
809 YYFPRINTF Args; \
810 } while (YYID (0))
811
812 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
813 do { \
814 if (yydebug) \
815 { \
816 YYFPRINTF (stderr, "%s ", Title); \
817 yy_symbol_print (stderr, \
818 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
819 YYFPRINTF (stderr, "\n"); \
820 } \
821 } while (YYID (0))
822
823 ]b4_yy_symbol_print_generate([b4_c_function_def])[
824
825 /*------------------------------------------------------------------.
826 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
827 | TOP (included). |
828 `------------------------------------------------------------------*/
829
830 ]b4_c_function_def([yy_stack_print], [static void],
831 [[yytype_int16 *yybottom], [yybottom]],
832 [[yytype_int16 *yytop], [yytop]])[
833 {
834 YYFPRINTF (stderr, "Stack now");
835 for (; yybottom <= yytop; yybottom++)
836 {
837 int yybot = *yybottom;
838 YYFPRINTF (stderr, " %d", yybot);
839 }
840 YYFPRINTF (stderr, "\n");
841 }
842
843 # define YY_STACK_PRINT(Bottom, Top) \
844 do { \
845 if (yydebug) \
846 yy_stack_print ((Bottom), (Top)); \
847 } while (YYID (0))
848
849
850 /*------------------------------------------------.
851 | Report that the YYRULE is going to be reduced. |
852 `------------------------------------------------*/
853
854 ]b4_c_function_def([yy_reduce_print], [static void],
855 [[YYSTYPE *yyvsp], [yyvsp]],
856 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
857 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
858 b4_parse_param]))[
859 {
860 int yynrhs = yyr2[yyrule];
861 int yyi;
862 unsigned long int yylno = yyrline[yyrule];
863 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
864 yyrule - 1, yylno);
865 /* The symbols being reduced. */
866 for (yyi = 0; yyi < yynrhs; yyi++)
867 {
868 YYFPRINTF (stderr, " $%d = ", yyi + 1);
869 yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi],
870 &]b4_rhs_value(yynrhs, yyi + 1)[
871 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
872 b4_user_args[);
873 YYFPRINTF (stderr, "\n");
874 }
875 }
876
877 # define YY_REDUCE_PRINT(Rule) \
878 do { \
879 if (yydebug) \
880 yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
881 } while (YYID (0))
882
883 /* Nonzero means print parse trace. It is left uninitialized so that
884 multiple parsers can coexist. */
885 int yydebug;
886 #else /* !]b4_api_PREFIX[DEBUG */
887 # define YYDPRINTF(Args)
888 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
889 # define YY_STACK_PRINT(Bottom, Top)
890 # define YY_REDUCE_PRINT(Rule)
891 #endif /* !]b4_api_PREFIX[DEBUG */
892
893
894 /* YYINITDEPTH -- initial size of the parser's stacks. */
895 #ifndef YYINITDEPTH
896 # define YYINITDEPTH ]b4_stack_depth_init[
897 #endif
898
899 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
900 if the built-in stack extension method is used).
901
902 Do not make this value too large; the results are undefined if
903 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
904 evaluated with infinite-precision integer arithmetic. */
905
906 #ifndef YYMAXDEPTH
907 # define YYMAXDEPTH ]b4_stack_depth_max[
908 #endif]b4_lac_if([[
909
910 /* Given a state stack such that *YYBOTTOM is its bottom, such that
911 *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty
912 stack, and such that *YYCAPACITY is the maximum number of elements it
913 can hold without a reallocation, make sure there is enough room to
914 store YYADD more elements. If not, allocate a new stack using
915 YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM,
916 *YYTOP, and *YYCAPACITY to reflect the new capacity and memory
917 location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack
918 using YYSTACK_FREE. Return 0 if successful or if no reallocation is
919 required. Return 1 if memory is exhausted. */
920 static int
921 yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
922 #if ]b4_api_PREFIX[DEBUG
923 char const *yydebug_prefix,
924 char const *yydebug_suffix,
925 #endif
926 yytype_int16 **yybottom,
927 yytype_int16 *yybottom_no_free,
928 yytype_int16 **yytop, yytype_int16 *yytop_empty)
929 {
930 YYSIZE_T yysize_old =
931 *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1;
932 YYSIZE_T yysize_new = yysize_old + yyadd;
933 if (*yycapacity < yysize_new)
934 {
935 YYSIZE_T yyalloc = 2 * yysize_new;
936 yytype_int16 *yybottom_new;
937 /* Use YYMAXDEPTH for maximum stack size given that the stack
938 should never need to grow larger than the main state stack
939 needs to grow without LAC. */
940 if (YYMAXDEPTH < yysize_new)
941 {
942 YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix,
943 yydebug_suffix));
944 return 1;
945 }
946 if (YYMAXDEPTH < yyalloc)
947 yyalloc = YYMAXDEPTH;
948 yybottom_new =
949 (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new);
950 if (!yybottom_new)
951 {
952 YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix,
953 yydebug_suffix));
954 return 1;
955 }
956 if (*yytop != yytop_empty)
957 {
958 YYCOPY (yybottom_new, *yybottom, yysize_old);
959 *yytop = yybottom_new + (yysize_old - 1);
960 }
961 if (*yybottom != yybottom_no_free)
962 YYSTACK_FREE (*yybottom);
963 *yybottom = yybottom_new;
964 *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]),
965 [full], [[
966 YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix,
967 (unsigned long int) yyalloc, yydebug_suffix));]])[
968 }
969 return 0;
970 }
971
972 /* Establish the initial context for the current lookahead if no initial
973 context is currently established.
974
975 We define a context as a snapshot of the parser stacks. We define
976 the initial context for a lookahead as the context in which the
977 parser initially examines that lookahead in order to select a
978 syntactic action. Thus, if the lookahead eventually proves
979 syntactically unacceptable (possibly in a later context reached via a
980 series of reductions), the initial context can be used to determine
981 the exact set of tokens that would be syntactically acceptable in the
982 lookahead's place. Moreover, it is the context after which any
983 further semantic actions would be erroneous because they would be
984 determined by a syntactically unacceptable token.
985
986 YY_LAC_ESTABLISH should be invoked when a reduction is about to be
987 performed in an inconsistent state (which, for the purposes of LAC,
988 includes consistent states that don't know they're consistent because
989 their default reductions have been disabled). Iff there is a
990 lookahead token, it should also be invoked before reporting a syntax
991 error. This latter case is for the sake of the debugging output.
992
993 For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as
994 follows. If no initial context is currently established for the
995 current lookahead, then check if that lookahead can eventually be
996 shifted if syntactic actions continue from the current context.
997 Report a syntax error if it cannot. */
998 #define YY_LAC_ESTABLISH \
999 do { \
1000 if (!yy_lac_established) \
1001 { \
1002 YYDPRINTF ((stderr, \
1003 "LAC: initial context established for %s\n", \
1004 yytname[yytoken])); \
1005 yy_lac_established = 1; \
1006 { \
1007 int yy_lac_status = \
1008 yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \
1009 if (yy_lac_status == 2) \
1010 goto yyexhaustedlab; \
1011 if (yy_lac_status == 1) \
1012 goto yyerrlab; \
1013 } \
1014 } \
1015 } while (YYID (0))
1016
1017 /* Discard any previous initial lookahead context because of Event,
1018 which may be a lookahead change or an invalidation of the currently
1019 established initial context for the current lookahead.
1020
1021 The most common example of a lookahead change is a shift. An example
1022 of both cases is syntax error recovery. That is, a syntax error
1023 occurs when the lookahead is syntactically erroneous for the
1024 currently established initial context, so error recovery manipulates
1025 the parser stacks to try to find a new initial context in which the
1026 current lookahead is syntactically acceptable. If it fails to find
1027 such a context, it discards the lookahead. */
1028 #if ]b4_api_PREFIX[DEBUG
1029 # define YY_LAC_DISCARD(Event) \
1030 do { \
1031 if (yy_lac_established) \
1032 { \
1033 if (yydebug) \
1034 YYFPRINTF (stderr, "LAC: initial context discarded due to " \
1035 Event "\n"); \
1036 yy_lac_established = 0; \
1037 } \
1038 } while (YYID (0))
1039 #else
1040 # define YY_LAC_DISCARD(Event) yy_lac_established = 0
1041 #endif
1042
1043 /* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can
1044 eventually (after perhaps some reductions) be shifted, return 1 if
1045 not, or return 2 if memory is exhausted. As preconditions and
1046 postconditions: *YYES_CAPACITY is the allocated size of the array to
1047 which *YYES points, and either *YYES = YYESA or *YYES points to an
1048 array allocated with YYSTACK_ALLOC. yy_lac may overwrite the
1049 contents of either array, alter *YYES and *YYES_CAPACITY, and free
1050 any old *YYES other than YYESA. */
1051 static int
1052 yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
1053 YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
1054 {
1055 yytype_int16 *yyes_prev = yyssp;
1056 yytype_int16 *yyesp = yyes_prev;
1057 YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken]));
1058 if (yytoken == YYUNDEFTOK)
1059 {
1060 YYDPRINTF ((stderr, " Always Err\n"));
1061 return 1;
1062 }
1063 while (1)
1064 {
1065 int yyrule = yypact[*yyesp];
1066 if (yypact_value_is_default (yyrule)
1067 || (yyrule += yytoken) < 0 || YYLAST < yyrule
1068 || yycheck[yyrule] != yytoken)
1069 {
1070 yyrule = yydefact[*yyesp];
1071 if (yyrule == 0)
1072 {
1073 YYDPRINTF ((stderr, " Err\n"));
1074 return 1;
1075 }
1076 }
1077 else
1078 {
1079 yyrule = yytable[yyrule];
1080 if (yytable_value_is_error (yyrule))
1081 {
1082 YYDPRINTF ((stderr, " Err\n"));
1083 return 1;
1084 }
1085 if (0 < yyrule)
1086 {
1087 YYDPRINTF ((stderr, " S%d\n", yyrule));
1088 return 0;
1089 }
1090 yyrule = -yyrule;
1091 }
1092 {
1093 YYSIZE_T yylen = yyr2[yyrule];
1094 YYDPRINTF ((stderr, " R%d", yyrule - 1));
1095 if (yyesp != yyes_prev)
1096 {
1097 YYSIZE_T yysize = yyesp - *yyes + 1;
1098 if (yylen < yysize)
1099 {
1100 yyesp -= yylen;
1101 yylen = 0;
1102 }
1103 else
1104 {
1105 yylen -= yysize;
1106 yyesp = yyes_prev;
1107 }
1108 }
1109 if (yylen)
1110 yyesp = yyes_prev -= yylen;
1111 }
1112 {
1113 int yystate;
1114 {
1115 int yylhs = yyr1[yyrule] - YYNTOKENS;
1116 yystate = yypgoto[yylhs] + *yyesp;
1117 if (yystate < 0 || YYLAST < yystate
1118 || yycheck[yystate] != *yyesp)
1119 yystate = yydefgoto[yylhs];
1120 else
1121 yystate = yytable[yystate];
1122 }
1123 if (yyesp == yyes_prev)
1124 {
1125 yyesp = *yyes;
1126 *yyesp = yystate;
1127 }
1128 else
1129 {
1130 if (yy_lac_stack_realloc (yyes_capacity, 1,
1131 #if ]b4_api_PREFIX[DEBUG
1132 " (", ")",
1133 #endif
1134 yyes, yyesa, &yyesp, yyes_prev))
1135 {
1136 YYDPRINTF ((stderr, "\n"));
1137 return 2;
1138 }
1139 *++yyesp = yystate;
1140 }
1141 YYDPRINTF ((stderr, " G%d", yystate));
1142 }
1143 }
1144 }]])[
1145
1146
1147 #if YYERROR_VERBOSE
1148
1149 # ifndef yystrlen
1150 # if defined __GLIBC__ && defined _STRING_H
1151 # define yystrlen strlen
1152 # else
1153 /* Return the length of YYSTR. */
1154 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
1155 [[const char *yystr], [yystr]])[
1156 {
1157 YYSIZE_T yylen;
1158 for (yylen = 0; yystr[yylen]; yylen++)
1159 continue;
1160 return yylen;
1161 }
1162 # endif
1163 # endif
1164
1165 # ifndef yystpcpy
1166 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
1167 # define yystpcpy stpcpy
1168 # else
1169 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
1170 YYDEST. */
1171 ]b4_c_function_def([yystpcpy], [static char *],
1172 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
1173 {
1174 char *yyd = yydest;
1175 const char *yys = yysrc;
1176
1177 while ((*yyd++ = *yys++) != '\0')
1178 continue;
1179
1180 return yyd - 1;
1181 }
1182 # endif
1183 # endif
1184
1185 # ifndef yytnamerr
1186 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
1187 quotes and backslashes, so that it's suitable for yyerror. The
1188 heuristic is that double-quoting is unnecessary unless the string
1189 contains an apostrophe, a comma, or backslash (other than
1190 backslash-backslash). YYSTR is taken from yytname. If YYRES is
1191 null, do not copy; instead, return the length of what the result
1192 would have been. */
1193 static YYSIZE_T
1194 yytnamerr (char *yyres, const char *yystr)
1195 {
1196 if (*yystr == '"')
1197 {
1198 YYSIZE_T yyn = 0;
1199 char const *yyp = yystr;
1200
1201 for (;;)
1202 switch (*++yyp)
1203 {
1204 case '\'':
1205 case ',':
1206 goto do_not_strip_quotes;
1207
1208 case '\\':
1209 if (*++yyp != '\\')
1210 goto do_not_strip_quotes;
1211 /* Fall through. */
1212 default:
1213 if (yyres)
1214 yyres[yyn] = *yyp;
1215 yyn++;
1216 break;
1217
1218 case '"':
1219 if (yyres)
1220 yyres[yyn] = '\0';
1221 return yyn;
1222 }
1223 do_not_strip_quotes: ;
1224 }
1225
1226 if (! yyres)
1227 return yystrlen (yystr);
1228
1229 return yystpcpy (yyres, yystr) - yyres;
1230 }
1231 # endif
1232
1233 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
1234 about the unexpected token YYTOKEN for the state stack whose top is
1235 YYSSP.]b4_lac_if([[ In order to see if a particular token T is a
1236 valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[
1237
1238 Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is
1239 not large enough to hold the message. In that case, also set
1240 *YYMSG_ALLOC to the required number of bytes. Return 2 if the
1241 required number of bytes is too large to store]b4_lac_if([[ or if
1242 yy_lac returned 2]])[. */
1243 static int
1244 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
1245 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
1246 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
1247 {
1248 YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
1249 YYSIZE_T yysize = yysize0;
1250 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
1251 /* Internationalized format string. */
1252 const char *yyformat = YY_NULL;
1253 /* Arguments of yyformat. */
1254 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
1255 /* Number of reported tokens (one for the "unexpected", one per
1256 "expected"). */
1257 int yycount = 0;
1258
1259 /* There are many possibilities here to consider:
1260 - Assume YYFAIL is not used. It's too flawed to consider. See
1261 <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
1262 for details. YYERROR is fine as it does not invoke this
1263 function.
1264 - If this state is a consistent state with a default action, then
1265 the only way this function was invoked is if the default action
1266 is an error action. In that case, don't check for expected
1267 tokens because there are none.
1268 - The only way there can be no lookahead present (in yychar) is if
1269 this state is a consistent state with a default action. Thus,
1270 detecting the absence of a lookahead is sufficient to determine
1271 that there is no unexpected or expected token to report. In that
1272 case, just report a simple "syntax error".
1273 - Don't assume there isn't a lookahead just because this state is a
1274 consistent state with a default action. There might have been a
1275 previous inconsistent state, consistent state with a non-default
1276 action, or user semantic action that manipulated yychar.]b4_lac_if([[
1277 In the first two cases, it might appear that the current syntax
1278 error should have been detected in the previous state when yy_lac
1279 was invoked. However, at that time, there might have been a
1280 different syntax error that discarded a different initial context
1281 during error recovery, leaving behind the current lookahead.]], [[
1282 - Of course, the expected token list depends on states to have
1283 correct lookahead information, and it depends on the parser not
1284 to perform extra reductions after fetching a lookahead from the
1285 scanner and before detecting a syntax error. Thus, state merging
1286 (from LALR or IELR) and default reductions corrupt the expected
1287 token list. However, the list is correct for canonical LR with
1288 one exception: it will still contain any token that will not be
1289 accepted due to an error action in a later state.]])[
1290 */
1291 if (yytoken != YYEMPTY)
1292 {
1293 int yyn = yypact[*yyssp];]b4_lac_if([[
1294 YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[
1295 yyarg[yycount++] = yytname[yytoken];
1296 if (!yypact_value_is_default (yyn))
1297 {]b4_lac_if([], [[
1298 /* Start YYX at -YYN if negative to avoid negative indexes in
1299 YYCHECK. In other words, skip the first -YYN actions for
1300 this state because they are default actions. */
1301 int yyxbegin = yyn < 0 ? -yyn : 0;
1302 /* Stay within bounds of both yycheck and yytname. */
1303 int yychecklim = YYLAST - yyn + 1;
1304 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[
1305 int yyx;]b4_lac_if([[
1306
1307 for (yyx = 0; yyx < YYNTOKENS; ++yyx)
1308 if (yyx != YYTERROR && yyx != YYUNDEFTOK)
1309 {
1310 {
1311 int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity,
1312 yyssp, yyx);
1313 if (yy_lac_status == 2)
1314 return 2;
1315 if (yy_lac_status == 1)
1316 continue;
1317 }]], [[
1318
1319 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
1320 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
1321 && !yytable_value_is_error (yytable[yyx + yyn]))
1322 {]])[
1323 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
1324 {
1325 yycount = 1;
1326 yysize = yysize0;
1327 break;
1328 }
1329 yyarg[yycount++] = yytname[yyx];
1330 {
1331 YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
1332 if (! (yysize <= yysize1
1333 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1334 return 2;
1335 yysize = yysize1;
1336 }
1337 }
1338 }]b4_lac_if([[
1339 # if ]b4_api_PREFIX[DEBUG
1340 else if (yydebug)
1341 YYFPRINTF (stderr, "No expected tokens.\n");
1342 # endif]])[
1343 }
1344
1345 switch (yycount)
1346 {
1347 # define YYCASE_(N, S) \
1348 case N: \
1349 yyformat = S; \
1350 break
1351 YYCASE_(0, YY_("syntax error"));
1352 YYCASE_(1, YY_("syntax error, unexpected %s"));
1353 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
1354 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
1355 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
1356 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
1357 # undef YYCASE_
1358 }
1359
1360 {
1361 YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
1362 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1363 return 2;
1364 yysize = yysize1;
1365 }
1366
1367 if (*yymsg_alloc < yysize)
1368 {
1369 *yymsg_alloc = 2 * yysize;
1370 if (! (yysize <= *yymsg_alloc
1371 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
1372 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
1373 return 1;
1374 }
1375
1376 /* Avoid sprintf, as that infringes on the user's name space.
1377 Don't have undefined behavior even if the translation
1378 produced a string with the wrong number of "%s"s. */
1379 {
1380 char *yyp = *yymsg;
1381 int yyi = 0;
1382 while ((*yyp = *yyformat) != '\0')
1383 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1384 {
1385 yyp += yytnamerr (yyp, yyarg[yyi++]);
1386 yyformat += 2;
1387 }
1388 else
1389 {
1390 yyp++;
1391 yyformat++;
1392 }
1393 }
1394 return 0;
1395 }
1396 #endif /* YYERROR_VERBOSE */
1397
1398 ]b4_yydestruct_generate([b4_c_function_def])[
1399
1400 ]b4_pure_if([], [
1401
1402 b4_declare_scanner_communication_variables])[]b4_push_if([[
1403
1404 struct yypstate
1405 {]b4_declare_parser_state_variables[
1406 /* Used to determine if this is the first time this instance has
1407 been used. */
1408 int yynew;
1409 };]b4_pure_if([], [[
1410
1411 static char yypstate_allocated = 0;]])b4_pull_if([
1412
1413 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1414 {
1415 return yypull_parse (YY_NULL]m4_ifset([b4_parse_param],
1416 [[, ]b4_c_args(b4_parse_param)])[);
1417 }
1418
1419 ]b4_c_function_def([[yypull_parse]], [[int]],
1420 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1421 b4_parse_param]))[
1422 {
1423 int yystatus;
1424 yypstate *yyps_local;]b4_pure_if([[
1425 int yychar;
1426 YYSTYPE yylval;]b4_locations_if([[
1427 static YYLTYPE yyloc_default][]b4_yyloc_default[;
1428 YYLTYPE yylloc = yyloc_default;]])])[
1429 if (yyps)
1430 yyps_local = yyps;
1431 else
1432 {
1433 yyps_local = yypstate_new ();
1434 if (!yyps_local)
1435 {]b4_pure_if([[
1436 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1437 if (!yypstate_allocated)
1438 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1439 return 2;
1440 }
1441 }
1442 do {
1443 yychar = YYLEX;
1444 yystatus =
1445 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1446 } while (yystatus == YYPUSH_MORE);
1447 if (!yyps)
1448 yypstate_delete (yyps_local);
1449 return yystatus;
1450 }]])[
1451
1452 /* Initialize the parser data structure. */
1453 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1454 {
1455 yypstate *yyps;]b4_pure_if([], [[
1456 if (yypstate_allocated)
1457 return YY_NULL;]])[
1458 yyps = (yypstate *) malloc (sizeof *yyps);
1459 if (!yyps)
1460 return YY_NULL;
1461 yyps->yynew = 1;]b4_pure_if([], [[
1462 yypstate_allocated = 1;]])[
1463 return yyps;
1464 }
1465
1466 ]b4_c_function_def([[yypstate_delete]], [[void]],
1467 [[[yypstate *yyps]], [[yyps]]])[
1468 {
1469 #ifndef yyoverflow
1470 /* If the stack was reallocated but the parse did not complete, then the
1471 stack still needs to be freed. */
1472 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1473 YYSTACK_FREE (yyps->yyss);
1474 #endif]b4_lac_if([[
1475 if (!yyps->yynew && yyps->yyes != yyps->yyesa)
1476 YYSTACK_FREE (yyps->yyes);]])[
1477 free (yyps);]b4_pure_if([], [[
1478 yypstate_allocated = 0;]])[
1479 }
1480 ]b4_pure_if([[
1481 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1482 #define yystate yyps->yystate
1483 #define yyerrstatus yyps->yyerrstatus
1484 #define yyssa yyps->yyssa
1485 #define yyss yyps->yyss
1486 #define yyssp yyps->yyssp
1487 #define yyvsa yyps->yyvsa
1488 #define yyvs yyps->yyvs
1489 #define yyvsp yyps->yyvsp]b4_locations_if([[
1490 #define yylsa yyps->yylsa
1491 #define yyls yyps->yyls
1492 #define yylsp yyps->yylsp
1493 #define yyerror_range yyps->yyerror_range]])[
1494 #define yystacksize yyps->yystacksize]b4_lac_if([[
1495 #define yyesa yyps->yyesa
1496 #define yyes yyps->yyes
1497 #define yyes_capacity yyps->yyes_capacity]])[
1498
1499
1500 /*---------------.
1501 | yypush_parse. |
1502 `---------------*/
1503
1504 ]b4_c_function_def([[yypush_parse]], [[int]],
1505 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1506 [[[int yypushed_char]], [[yypushed_char]]],
1507 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1508 [[[YYLTYPE *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1509 b4_parse_param]))], [[
1510
1511
1512 /*----------.
1513 | yyparse. |
1514 `----------*/
1515
1516 #ifdef YYPARSE_PARAM
1517 ]b4_c_function_def([yyparse], [int],
1518 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1519 #else /* ! YYPARSE_PARAM */
1520 ]b4_c_function_def([yyparse], [int], b4_parse_param)[
1521 #endif]])[
1522 {]b4_pure_if([b4_declare_scanner_communication_variables
1523 ])b4_push_if([b4_pure_if([], [[
1524 int yypushed_char = yychar;
1525 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1526 YYLTYPE yypushed_loc = yylloc;]])
1527 ])],
1528 [b4_declare_parser_state_variables
1529 ])b4_lac_if([[
1530 int yy_lac_established = 0;]])[
1531 int yyn;
1532 int yyresult;
1533 /* Lookahead token as an internal (translated) token number. */
1534 int yytoken = 0;
1535 /* The variables used to return semantic value and location from the
1536 action routines. */
1537 YYSTYPE yyval;]b4_locations_if([[
1538 YYLTYPE yyloc;]])[
1539
1540 #if YYERROR_VERBOSE
1541 /* Buffer for error messages, and its allocated size. */
1542 char yymsgbuf[128];
1543 char *yymsg = yymsgbuf;
1544 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1545 #endif
1546
1547 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1548
1549 /* The number of symbols on the RHS of the reduced rule.
1550 Keep to zero when no symbol should be popped. */
1551 int yylen = 0;]b4_push_if([[
1552
1553 if (!yyps->yynew)
1554 {
1555 yyn = yypact[yystate];
1556 goto yyread_pushed_token;
1557 }]])[
1558
1559 yyssp = yyss = yyssa;
1560 yyvsp = yyvs = yyvsa;]b4_locations_if([[
1561 yylsp = yyls = yylsa;]])[
1562 yystacksize = YYINITDEPTH;]b4_lac_if([[
1563
1564 yyes = yyesa;
1565 yyes_capacity = sizeof yyesa / sizeof *yyes;
1566 if (YYMAXDEPTH < yyes_capacity)
1567 yyes_capacity = YYMAXDEPTH;]])[
1568
1569 YYDPRINTF ((stderr, "Starting parse\n"));
1570
1571 yystate = 0;
1572 yyerrstatus = 0;
1573 yynerrs = 0;
1574 yychar = YYEMPTY; /* Cause a token to be read. */
1575 ]m4_ifdef([b4_initial_action], [
1576 b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [],
1577 [b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl
1578 /* User initialization code. */
1579 b4_user_initial_action
1580 b4_dollar_popdef[]dnl
1581 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1582 ]])])dnl
1583 b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[;
1584 ]])dnl
1585 [ goto yysetstate;
1586
1587 /*------------------------------------------------------------.
1588 | yynewstate -- Push a new state, which is found in yystate. |
1589 `------------------------------------------------------------*/
1590 yynewstate:
1591 /* In all cases, when you get here, the value and location stacks
1592 have just been pushed. So pushing a state here evens the stacks. */
1593 yyssp++;
1594
1595 yysetstate:
1596 *yyssp = yystate;
1597
1598 if (yyss + yystacksize - 1 <= yyssp)
1599 {
1600 /* Get the current used size of the three stacks, in elements. */
1601 YYSIZE_T yysize = yyssp - yyss + 1;
1602
1603 #ifdef yyoverflow
1604 {
1605 /* Give user a chance to reallocate the stack. Use copies of
1606 these so that the &'s don't force the real ones into
1607 memory. */
1608 YYSTYPE *yyvs1 = yyvs;
1609 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1610 YYLTYPE *yyls1 = yyls;])[
1611
1612 /* Each stack pointer address is followed by the size of the
1613 data in use in that stack, in bytes. This used to be a
1614 conditional around just the two extra args, but that might
1615 be undefined if yyoverflow is a macro. */
1616 yyoverflow (YY_("memory exhausted"),
1617 &yyss1, yysize * sizeof (*yyssp),
1618 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1619 &yyls1, yysize * sizeof (*yylsp),])[
1620 &yystacksize);
1621 ]b4_locations_if([
1622 yyls = yyls1;])[
1623 yyss = yyss1;
1624 yyvs = yyvs1;
1625 }
1626 #else /* no yyoverflow */
1627 # ifndef YYSTACK_RELOCATE
1628 goto yyexhaustedlab;
1629 # else
1630 /* Extend the stack our own way. */
1631 if (YYMAXDEPTH <= yystacksize)
1632 goto yyexhaustedlab;
1633 yystacksize *= 2;
1634 if (YYMAXDEPTH < yystacksize)
1635 yystacksize = YYMAXDEPTH;
1636
1637 {
1638 yytype_int16 *yyss1 = yyss;
1639 union yyalloc *yyptr =
1640 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1641 if (! yyptr)
1642 goto yyexhaustedlab;
1643 YYSTACK_RELOCATE (yyss_alloc, yyss);
1644 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1645 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1646 # undef YYSTACK_RELOCATE
1647 if (yyss1 != yyssa)
1648 YYSTACK_FREE (yyss1);
1649 }
1650 # endif
1651 #endif /* no yyoverflow */
1652
1653 yyssp = yyss + yysize - 1;
1654 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1655 yylsp = yyls + yysize - 1;])[
1656
1657 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1658 (unsigned long int) yystacksize));
1659
1660 if (yyss + yystacksize - 1 <= yyssp)
1661 YYABORT;
1662 }
1663
1664 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1665
1666 if (yystate == YYFINAL)
1667 YYACCEPT;
1668
1669 goto yybackup;
1670
1671 /*-----------.
1672 | yybackup. |
1673 `-----------*/
1674 yybackup:
1675
1676 /* Do appropriate processing given the current state. Read a
1677 lookahead token if we need one and don't already have one. */
1678
1679 /* First try to decide what to do without reference to lookahead token. */
1680 yyn = yypact[yystate];
1681 if (yypact_value_is_default (yyn))
1682 goto yydefault;
1683
1684 /* Not known => get a lookahead token if don't already have one. */
1685
1686 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1687 if (yychar == YYEMPTY)
1688 {]b4_push_if([[
1689 if (!yyps->yynew)
1690 {]b4_use_push_for_pull_if([], [[
1691 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1692 yyresult = YYPUSH_MORE;
1693 goto yypushreturn;
1694 }
1695 yyps->yynew = 0;]b4_pure_if([], [[
1696 /* Restoring the pushed token is only necessary for the first
1697 yypush_parse invocation since subsequent invocations don't overwrite
1698 it before jumping to yyread_pushed_token. */
1699 yychar = yypushed_char;
1700 yylval = yypushed_val;]b4_locations_if([[
1701 yylloc = yypushed_loc;]])])[
1702 yyread_pushed_token:]])[
1703 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1704 yychar = yypushed_char;
1705 if (yypushed_val)
1706 yylval = *yypushed_val;]b4_locations_if([[
1707 if (yypushed_loc)
1708 yylloc = *yypushed_loc;]])])], [[
1709 yychar = YYLEX;]])[
1710 }
1711
1712 if (yychar <= YYEOF)
1713 {
1714 yychar = yytoken = YYEOF;
1715 YYDPRINTF ((stderr, "Now at end of input.\n"));
1716 }
1717 else
1718 {
1719 yytoken = YYTRANSLATE (yychar);
1720 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1721 }
1722
1723 /* If the proper action on seeing token YYTOKEN is to reduce or to
1724 detect an error, take that action. */
1725 yyn += yytoken;
1726 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[
1727 {
1728 YY_LAC_ESTABLISH;
1729 goto yydefault;
1730 }]], [[
1731 goto yydefault;]])[
1732 yyn = yytable[yyn];
1733 if (yyn <= 0)
1734 {
1735 if (yytable_value_is_error (yyn))
1736 goto yyerrlab;]b4_lac_if([[
1737 YY_LAC_ESTABLISH;]])[
1738 yyn = -yyn;
1739 goto yyreduce;
1740 }
1741
1742 /* Count tokens shifted since error; after three, turn off error
1743 status. */
1744 if (yyerrstatus)
1745 yyerrstatus--;
1746
1747 /* Shift the lookahead token. */
1748 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1749
1750 /* Discard the shifted token. */
1751 yychar = YYEMPTY;]b4_lac_if([[
1752 YY_LAC_DISCARD ("shift");]])[
1753
1754 yystate = yyn;
1755 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
1756 *++yyvsp = yylval;
1757 YY_IGNORE_MAYBE_UNINITIALIZED_END
1758 ]b4_locations_if([ *++yylsp = yylloc;])[
1759 goto yynewstate;
1760
1761
1762 /*-----------------------------------------------------------.
1763 | yydefault -- do the default action for the current state. |
1764 `-----------------------------------------------------------*/
1765 yydefault:
1766 yyn = yydefact[yystate];
1767 if (yyn == 0)
1768 goto yyerrlab;
1769 goto yyreduce;
1770
1771
1772 /*-----------------------------.
1773 | yyreduce -- Do a reduction. |
1774 `-----------------------------*/
1775 yyreduce:
1776 /* yyn is the number of a rule to reduce with. */
1777 yylen = yyr2[yyn];
1778
1779 /* If YYLEN is nonzero, implement the default value of the action:
1780 `$$ = $1'.
1781
1782 Otherwise, the following line sets YYVAL to garbage.
1783 This behavior is undocumented and Bison
1784 users should not rely upon it. Assigning to YYVAL
1785 unconditionally makes the parser a bit smaller, and it avoids a
1786 GCC warning that YYVAL may be used uninitialized. */
1787 yyval = yyvsp[1-yylen];
1788
1789 ]b4_locations_if(
1790 [[ /* Default location. */
1791 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1792 YY_REDUCE_PRINT (yyn);]b4_lac_if([[
1793 {
1794 int yychar_backup = yychar;
1795 switch (yyn)
1796 {
1797 ]b4_user_actions[
1798 default: break;
1799 }
1800 if (yychar_backup != yychar)
1801 YY_LAC_DISCARD ("yychar change");
1802 }]], [[
1803 switch (yyn)
1804 {
1805 ]b4_user_actions[
1806 default: break;
1807 }]])[
1808 /* User semantic actions sometimes alter yychar, and that requires
1809 that yytoken be updated with the new translation. We take the
1810 approach of translating immediately before every use of yytoken.
1811 One alternative is translating here after every semantic action,
1812 but that translation would be missed if the semantic action invokes
1813 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1814 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
1815 incorrect destructor might then be invoked immediately. In the
1816 case of YYERROR or YYBACKUP, subsequent parser actions might lead
1817 to an incorrect destructor call or verbose syntax error message
1818 before the lookahead is translated. */
1819 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1820
1821 YYPOPSTACK (yylen);
1822 yylen = 0;
1823 YY_STACK_PRINT (yyss, yyssp);
1824
1825 *++yyvsp = yyval;]b4_locations_if([
1826 *++yylsp = yyloc;])[
1827
1828 /* Now `shift' the result of the reduction. Determine what state
1829 that goes to, based on the state we popped back to and the rule
1830 number reduced by. */
1831
1832 yyn = yyr1[yyn];
1833
1834 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1835 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1836 yystate = yytable[yystate];
1837 else
1838 yystate = yydefgoto[yyn - YYNTOKENS];
1839
1840 goto yynewstate;
1841
1842
1843 /*------------------------------------.
1844 | yyerrlab -- here on detecting error |
1845 `------------------------------------*/
1846 yyerrlab:
1847 /* Make sure we have latest lookahead translation. See comments at
1848 user semantic actions for why this is necessary. */
1849 yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
1850
1851 /* If not already recovering from an error, report this error. */
1852 if (!yyerrstatus)
1853 {
1854 ++yynerrs;
1855 #if ! YYERROR_VERBOSE
1856 yyerror (]b4_yyerror_args[YY_("syntax error"));
1857 #else
1858 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[
1859 yyesa, &yyes, &yyes_capacity, \]])[
1860 yyssp, yytoken)
1861 {
1862 char const *yymsgp = YY_("syntax error");
1863 int yysyntax_error_status;]b4_lac_if([[
1864 if (yychar != YYEMPTY)
1865 YY_LAC_ESTABLISH;]])[
1866 yysyntax_error_status = YYSYNTAX_ERROR;
1867 if (yysyntax_error_status == 0)
1868 yymsgp = yymsg;
1869 else if (yysyntax_error_status == 1)
1870 {
1871 if (yymsg != yymsgbuf)
1872 YYSTACK_FREE (yymsg);
1873 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1874 if (!yymsg)
1875 {
1876 yymsg = yymsgbuf;
1877 yymsg_alloc = sizeof yymsgbuf;
1878 yysyntax_error_status = 2;
1879 }
1880 else
1881 {
1882 yysyntax_error_status = YYSYNTAX_ERROR;
1883 yymsgp = yymsg;
1884 }
1885 }
1886 yyerror (]b4_yyerror_args[yymsgp);
1887 if (yysyntax_error_status == 2)
1888 goto yyexhaustedlab;
1889 }
1890 # undef YYSYNTAX_ERROR
1891 #endif
1892 }
1893
1894 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
1895
1896 if (yyerrstatus == 3)
1897 {
1898 /* If just tried and failed to reuse lookahead token after an
1899 error, discard it. */
1900
1901 if (yychar <= YYEOF)
1902 {
1903 /* Return failure if at end of input. */
1904 if (yychar == YYEOF)
1905 YYABORT;
1906 }
1907 else
1908 {
1909 yydestruct ("Error: discarding",
1910 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1911 yychar = YYEMPTY;
1912 }
1913 }
1914
1915 /* Else will try to reuse lookahead token after shifting the error
1916 token. */
1917 goto yyerrlab1;
1918
1919
1920 /*---------------------------------------------------.
1921 | yyerrorlab -- error raised explicitly by YYERROR. |
1922 `---------------------------------------------------*/
1923 yyerrorlab:
1924
1925 /* Pacify compilers like GCC when the user code never invokes
1926 YYERROR and the label yyerrorlab therefore never appears in user
1927 code. */
1928 if (/*CONSTCOND*/ 0)
1929 goto yyerrorlab;
1930
1931 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
1932 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1933 this YYERROR. */
1934 YYPOPSTACK (yylen);
1935 yylen = 0;
1936 YY_STACK_PRINT (yyss, yyssp);
1937 yystate = *yyssp;
1938 goto yyerrlab1;
1939
1940
1941 /*-------------------------------------------------------------.
1942 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1943 `-------------------------------------------------------------*/
1944 yyerrlab1:
1945 yyerrstatus = 3; /* Each real token shifted decrements this. */
1946
1947 for (;;)
1948 {
1949 yyn = yypact[yystate];
1950 if (!yypact_value_is_default (yyn))
1951 {
1952 yyn += YYTERROR;
1953 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1954 {
1955 yyn = yytable[yyn];
1956 if (0 < yyn)
1957 break;
1958 }
1959 }
1960
1961 /* Pop the current state because it cannot handle the error token. */
1962 if (yyssp == yyss)
1963 YYABORT;
1964
1965 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
1966 yydestruct ("Error: popping",
1967 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1968 YYPOPSTACK (1);
1969 yystate = *yyssp;
1970 YY_STACK_PRINT (yyss, yyssp);
1971 }]b4_lac_if([[
1972
1973 /* If the stack popping above didn't lose the initial context for the
1974 current lookahead token, the shift below will for sure. */
1975 YY_LAC_DISCARD ("error recovery");]])[
1976
1977 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
1978 *++yyvsp = yylval;
1979 YY_IGNORE_MAYBE_UNINITIALIZED_END
1980 ]b4_locations_if([[
1981 yyerror_range[2] = yylloc;
1982 /* Using YYLLOC is tempting, but would change the location of
1983 the lookahead. YYLOC is available though. */
1984 YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1985 *++yylsp = yyloc;]])[
1986
1987 /* Shift the error token. */
1988 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1989
1990 yystate = yyn;
1991 goto yynewstate;
1992
1993
1994 /*-------------------------------------.
1995 | yyacceptlab -- YYACCEPT comes here. |
1996 `-------------------------------------*/
1997 yyacceptlab:
1998 yyresult = 0;
1999 goto yyreturn;
2000
2001 /*-----------------------------------.
2002 | yyabortlab -- YYABORT comes here. |
2003 `-----------------------------------*/
2004 yyabortlab:
2005 yyresult = 1;
2006 goto yyreturn;
2007
2008 #if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[
2009 /*-------------------------------------------------.
2010 | yyexhaustedlab -- memory exhaustion comes here. |
2011 `-------------------------------------------------*/
2012 yyexhaustedlab:
2013 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
2014 yyresult = 2;
2015 /* Fall through. */
2016 #endif
2017
2018 yyreturn:
2019 if (yychar != YYEMPTY)
2020 {
2021 /* Make sure we have latest lookahead translation. See comments at
2022 user semantic actions for why this is necessary. */
2023 yytoken = YYTRANSLATE (yychar);
2024 yydestruct ("Cleanup: discarding lookahead",
2025 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
2026 }
2027 /* Do not reclaim the symbols of the rule which action triggered
2028 this YYABORT or YYACCEPT. */
2029 YYPOPSTACK (yylen);
2030 YY_STACK_PRINT (yyss, yyssp);
2031 while (yyssp != yyss)
2032 {
2033 yydestruct ("Cleanup: popping",
2034 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
2035 YYPOPSTACK (1);
2036 }
2037 #ifndef yyoverflow
2038 if (yyss != yyssa)
2039 YYSTACK_FREE (yyss);
2040 #endif]b4_lac_if([[
2041 if (yyes != yyesa)
2042 YYSTACK_FREE (yyes);]])b4_push_if([[
2043 yyps->yynew = 1;
2044
2045 yypushreturn:]])[
2046 #if YYERROR_VERBOSE
2047 if (yymsg != yymsgbuf)
2048 YYSTACK_FREE (yymsg);
2049 #endif
2050 /* Make sure YYID is used. */
2051 return YYID (yyresult);
2052 }
2053
2054
2055 ]b4_epilogue[]dnl
2056 b4_output_end()
2057
2058 b4_defines_if(
2059 [b4_output_begin([b4_spec_defines_file])[
2060 ]b4_copyright([Bison interface for Yacc-like parsers in C],
2061 [1984, 1989-1990, 2000-2012])[
2062
2063 ]b4_shared_declarations[
2064 ]b4_output_end()
2065 ])
bison