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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 [$2])])
81
82
83 # b4_yyerror_args
84 # ---------------
85 # Arguments passed to yyerror: user args plus yylloc.
86 m4_define([b4_yyerror_args],
87 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
88 m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
89
90
91 # b4_lex_param
92 # ------------
93 # Accumulate in b4_lex_param all the yylex arguments.
94 # b4_lex_param arrives quoted twice, but we want to keep only one level.
95 m4_define([b4_lex_param],
96 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
97 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
98 m4_ifdef([b4_lex_param], b4_lex_param)))
99
100
101 ## ------------ ##
102 ## Data Types. ##
103 ## ------------ ##
104
105 # b4_int_type(MIN, MAX)
106 # ---------------------
107 # Return the smallest int type able to handle numbers ranging from
108 # MIN to MAX (included). Overwrite the version from c.m4, which
109 # uses only C89 types, so that the user can override the shorter
110 # types, and so that pre-C89 compilers are handled correctly.
111 m4_define([b4_int_type],
112 [m4_if(b4_ints_in($@, [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_function_declare([b4_prefix[parse]], [[int]], b4_parse_param)
243 ])b4_function_declare([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_function_declare([b4_prefix[pull_parse]], [[int]],
250 [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,
251 b4_parse_param]))])
252 b4_function_declare([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
253 [[[void]], []])
254 b4_function_declare([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 [b4_function_declare(b4_prefix[parse], [int], b4_parse_param)])
263
264
265 # b4_declare_yyparse
266 # ------------------
267 m4_define([b4_declare_yyparse],
268 [b4_push_if([b4_declare_yyparse_push_],
269 [b4_declare_yyparse_])[]dnl
270 ])
271
272
273 # b4_shared_declarations
274 # ----------------------
275 # Declaration that might either go into the header (if --defines)
276 # or open coded in the parser body.
277 m4_define([b4_shared_declarations],
278 [b4_cpp_guard_open([b4_spec_defines_file])[
279 ]b4_declare_yydebug[
280 ]b4_percent_code_get([[requires]])[
281 ]b4_token_enums_defines[
282 ]b4_declare_yylstype[
283 ]b4_declare_yyparse[
284 ]b4_percent_code_get([[provides]])[
285 ]b4_cpp_guard_close([b4_spec_defines_file])[]dnl
286 ])
287
288 ## -------------- ##
289 ## Output files. ##
290 ## -------------- ##
291
292 # We do want M4 expansion after # for CPP macros.
293 m4_changecom()
294 m4_divert_push(0)dnl
295 @output(b4_parser_file_name@)@
296 b4_copyright([Bison implementation for Yacc-like parsers in C])[
297
298 /* C LALR(1) parser skeleton written by Richard Stallman, by
299 simplifying the original so-called "semantic" parser. */
300
301 /* All symbols defined below should begin with yy or YY, to avoid
302 infringing on user name space. This should be done even for local
303 variables, as they might otherwise be expanded by user macros.
304 There are some unavoidable exceptions within include files to
305 define necessary library symbols; they are noted "INFRINGES ON
306 USER NAME SPACE" below. */
307
308 ]b4_identification
309 b4_percent_code_get([[top]])[]dnl
310 m4_if(b4_api_prefix, [yy], [],
311 [[/* Substitute the type names. */
312 #define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[
313 #define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[
314 ]m4_if(b4_prefix, [yy], [],
315 [[/* Substitute the variable and function names. */]b4_pull_if([[
316 #define yyparse ]b4_prefix[parse]])b4_push_if([[
317 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
318 #define yypull_parse ]b4_prefix[pull_parse]])[
319 #define yypstate_new ]b4_prefix[pstate_new
320 #define yypstate_delete ]b4_prefix[pstate_delete
321 #define yypstate ]b4_prefix[pstate]])[
322 #define yylex ]b4_prefix[lex
323 #define yyerror ]b4_prefix[error
324 #define yylval ]b4_prefix[lval
325 #define yychar ]b4_prefix[char
326 #define yydebug ]b4_prefix[debug
327 #define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
328 #define yylloc ]b4_prefix[lloc]])])[
329
330 /* Copy the first part of user declarations. */
331 ]b4_user_pre_prologue[
332
333 ]b4_null_define[
334
335 /* Enabling verbose error messages. */
336 #ifdef YYERROR_VERBOSE
337 # undef YYERROR_VERBOSE
338 # define YYERROR_VERBOSE 1
339 #else
340 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
341 #endif
342
343 /* In a future release of Bison, this section will be replaced
344 by #include "@basename(]b4_spec_defines_file[@)". */
345 ]b4_shared_declarations[
346
347 /* Copy the second part of user declarations. */
348 ]b4_user_post_prologue
349 b4_percent_code_get[]dnl
350
351 [#ifdef short
352 # undef short
353 #endif
354
355 #ifdef YYTYPE_UINT8
356 typedef YYTYPE_UINT8 yytype_uint8;
357 #else
358 typedef unsigned char yytype_uint8;
359 #endif
360
361 #ifdef YYTYPE_INT8
362 typedef YYTYPE_INT8 yytype_int8;
363 #else
364 typedef signed char yytype_int8;
365 #endif
366
367 #ifdef YYTYPE_UINT16
368 typedef YYTYPE_UINT16 yytype_uint16;
369 #else
370 typedef unsigned short int yytype_uint16;
371 #endif
372
373 #ifdef YYTYPE_INT16
374 typedef YYTYPE_INT16 yytype_int16;
375 #else
376 typedef short int yytype_int16;
377 #endif
378
379 #ifndef YYSIZE_T
380 # ifdef __SIZE_TYPE__
381 # define YYSIZE_T __SIZE_TYPE__
382 # elif defined size_t
383 # define YYSIZE_T size_t
384 # elif ! defined YYSIZE_T
385 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
386 # define YYSIZE_T size_t
387 # else
388 # define YYSIZE_T unsigned int
389 # endif
390 #endif
391
392 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
393
394 #ifndef YY_
395 # if defined YYENABLE_NLS && YYENABLE_NLS
396 # if ENABLE_NLS
397 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
398 # define YY_(msgid) dgettext ("bison-runtime", msgid)
399 # endif
400 # endif
401 # ifndef YY_
402 # define YY_(msgid) msgid
403 # endif
404 #endif
405
406 /* Suppress unused-variable warnings by "using" E. */
407 #ifdef __GNUC__
408 # define YYUSE(e) ((void) (e))
409 #else
410 # define YYUSE(e) /* empty */
411 #endif
412
413 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
414
415 /* The parser invokes alloca or malloc; define the necessary symbols. */]dnl
416 b4_push_if([], [b4_lac_if([], [[
417
418 # ifdef YYSTACK_USE_ALLOCA
419 # if YYSTACK_USE_ALLOCA
420 # ifdef __GNUC__
421 # define YYSTACK_ALLOC __builtin_alloca
422 # elif defined __BUILTIN_VA_ARG_INCR
423 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
424 # elif defined _AIX
425 # define YYSTACK_ALLOC __alloca
426 # elif defined _MSC_VER
427 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
428 # define alloca _alloca
429 # else
430 # define YYSTACK_ALLOC alloca
431 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
432 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
433 /* Use EXIT_SUCCESS as a witness for stdlib.h. */
434 # ifndef EXIT_SUCCESS
435 # define EXIT_SUCCESS 0
436 # endif
437 # endif
438 # endif
439 # endif
440 # endif]])])[
441
442 # ifdef YYSTACK_ALLOC
443 /* Pacify GCC's `empty if-body' warning. */
444 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
445 # ifndef YYSTACK_ALLOC_MAXIMUM
446 /* The OS might guarantee only one guard page at the bottom of the stack,
447 and a page size can be as small as 4096 bytes. So we cannot safely
448 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
449 to allow for a few compiler-allocated temporary stack slots. */
450 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
451 # endif
452 # else
453 # define YYSTACK_ALLOC YYMALLOC
454 # define YYSTACK_FREE YYFREE
455 # ifndef YYSTACK_ALLOC_MAXIMUM
456 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
457 # endif
458 # if (defined __cplusplus && ! defined EXIT_SUCCESS \
459 && ! ((defined YYMALLOC || defined malloc) \
460 && (defined YYFREE || defined free)))
461 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
462 # ifndef EXIT_SUCCESS
463 # define EXIT_SUCCESS 0
464 # endif
465 # endif
466 # ifndef YYMALLOC
467 # define YYMALLOC malloc
468 # if ! defined malloc && ! defined EXIT_SUCCESS
469 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
470 # endif
471 # endif
472 # ifndef YYFREE
473 # define YYFREE free
474 # if ! defined free && ! defined EXIT_SUCCESS
475 void free (void *); /* INFRINGES ON USER NAME SPACE */
476 # endif
477 # endif
478 # endif]b4_lac_if([[
479 # define YYCOPY_NEEDED 1]])[
480 #endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[
481
482
483 #if (! defined yyoverflow \
484 && (! defined __cplusplus \
485 || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \
486 && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL)))
487
488 /* A type that is properly aligned for any stack member. */
489 union yyalloc
490 {
491 yytype_int16 yyss_alloc;
492 YYSTYPE yyvs_alloc;]b4_locations_if([
493 YYLTYPE yyls_alloc;])[
494 };
495
496 /* The size of the maximum gap between one aligned stack and the next. */
497 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
498
499 /* The size of an array large to enough to hold all stacks, each with
500 N elements. */
501 ]b4_locations_if(
502 [# define YYSTACK_BYTES(N) \
503 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
504 + 2 * YYSTACK_GAP_MAXIMUM)],
505 [# define YYSTACK_BYTES(N) \
506 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
507 + YYSTACK_GAP_MAXIMUM)])[
508
509 # define YYCOPY_NEEDED 1
510
511 /* Relocate STACK from its old location to the new one. The
512 local variables YYSIZE and YYSTACKSIZE give the old and new number of
513 elements in the stack, and YYPTR gives the new location of the
514 stack. Advance YYPTR to a properly aligned location for the next
515 stack. */
516 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
517 do \
518 { \
519 YYSIZE_T yynewbytes; \
520 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
521 Stack = &yyptr->Stack_alloc; \
522 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
523 yyptr += yynewbytes / sizeof (*yyptr); \
524 } \
525 while (0)
526
527 #endif
528
529 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED
530 /* Copy COUNT objects from SRC to DST. The source and destination do
531 not overlap. */
532 # ifndef YYCOPY
533 # if defined __GNUC__ && 1 < __GNUC__
534 # define YYCOPY(Dst, Src, Count) \
535 __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
536 # else
537 # define YYCOPY(Dst, Src, Count) \
538 do \
539 { \
540 YYSIZE_T yyi; \
541 for (yyi = 0; yyi < (Count); yyi++) \
542 (Dst)[yyi] = (Src)[yyi]; \
543 } \
544 while (0)
545 # endif
546 # endif
547 #endif /* !YYCOPY_NEEDED */
548
549 /* YYFINAL -- State number of the termination state. */
550 #define YYFINAL ]b4_final_state_number[
551 /* YYLAST -- Last index in YYTABLE. */
552 #define YYLAST ]b4_last[
553
554 /* YYNTOKENS -- Number of terminals. */
555 #define YYNTOKENS ]b4_tokens_number[
556 /* YYNNTS -- Number of nonterminals. */
557 #define YYNNTS ]b4_nterms_number[
558 /* YYNRULES -- Number of rules. */
559 #define YYNRULES ]b4_rules_number[
560 /* YYNSTATES -- Number of states. */
561 #define YYNSTATES ]b4_states_number[
562
563 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
564 by yylex, with out-of-bounds checking. */
565 #define YYUNDEFTOK ]b4_undef_token_number[
566 #define YYMAXUTOK ]b4_user_token_number_max[
567
568 #define YYTRANSLATE(YYX) \
569 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
570
571 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
572 as returned by yylex, without out-of-bounds checking. */
573 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
574 {
575 ]b4_translate[
576 };
577
578 #if ]b4_api_PREFIX[DEBUG
579 ]b4_integral_parser_table_define([rline], [b4_rline],
580 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
581 #endif
582
583 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
584 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
585 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
586 static const char *const yytname[] =
587 {
588 ]b4_tname[
589 };
590 #endif
591
592 # ifdef YYPRINT
593 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
594 (internal) symbol number NUM (which must be that of a token). */
595 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
596 {
597 ]b4_toknum[
598 };
599 # endif
600
601 #define YYPACT_NINF ]b4_pact_ninf[
602
603 #define yypact_value_is_default(yystate) \
604 ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
605
606 #define YYTABLE_NINF ]b4_table_ninf[
607
608 #define yytable_value_is_error(yytable_value) \
609 ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
610
611 ]b4_parser_tables_define[
612
613 #define yyerrok (yyerrstatus = 0)
614 #define yyclearin (yychar = YYEMPTY)
615 #define YYEMPTY (-2)
616 #define YYEOF 0
617
618 #define YYACCEPT goto yyacceptlab
619 #define YYABORT goto yyabortlab
620 #define YYERROR goto yyerrorlab
621
622
623 #define YYRECOVERING() (!!yyerrstatus)
624
625 #define YYBACKUP(Token, Value) \
626 do \
627 if (yychar == YYEMPTY) \
628 { \
629 yychar = (Token); \
630 yylval = (Value); \
631 YYPOPSTACK (yylen); \
632 yystate = *yyssp; \]b4_lac_if([[
633 YY_LAC_DISCARD ("YYBACKUP"); \]])[
634 goto yybackup; \
635 } \
636 else \
637 { \
638 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
639 YYERROR; \
640 } \
641 while (0)
642
643
644 #define YYTERROR 1
645 #define YYERRCODE 256
646
647 ]b4_locations_if([[
648 ]b4_yylloc_default_define[
649 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
650
651 /* YY_LOCATION_PRINT -- Print the location on the stream.
652 This macro was not mandated originally: define only if we know
653 we won't break user code: when these are the locations we know. */
654
655 #ifndef YY_LOCATION_PRINT
656 # if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
657 # define YY_LOCATION_PRINT(File, Loc) \
658 fprintf (File, "%d.%d-%d.%d", \
659 (Loc).first_line, (Loc).first_column, \
660 (Loc).last_line, (Loc).last_column)
661 # else
662 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
663 # endif
664 #endif]], [[
665
666
667 /* This macro is provided for backward compatibility. */
668
669 #ifndef YY_LOCATION_PRINT
670 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
671 #endif]])[
672
673
674 /* YYLEX -- calling `yylex' with the right arguments. */
675
676 #ifdef YYLEX_PARAM
677 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
678 #else
679 # define YYLEX ]b4_function_call([yylex], [int], b4_lex_param)[
680 #endif
681
682 /* Enable debugging if requested. */
683 #if ]b4_api_PREFIX[DEBUG
684
685 # ifndef YYFPRINTF
686 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
687 # define YYFPRINTF fprintf
688 # endif
689
690 # define YYDPRINTF(Args) \
691 do { \
692 if (yydebug) \
693 YYFPRINTF Args; \
694 } while (0)
695
696 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
697 do { \
698 if (yydebug) \
699 { \
700 YYFPRINTF (stderr, "%s ", Title); \
701 yy_symbol_print (stderr, \
702 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
703 YYFPRINTF (stderr, "\n"); \
704 } \
705 } while (0)
706
707 ]b4_yy_symbol_print_define[
708
709 /*------------------------------------------------------------------.
710 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
711 | TOP (included). |
712 `------------------------------------------------------------------*/
713
714 ]b4_function_define([yy_stack_print], [static void],
715 [[yytype_int16 *yybottom], [yybottom]],
716 [[yytype_int16 *yytop], [yytop]])[
717 {
718 YYFPRINTF (stderr, "Stack now");
719 for (; yybottom <= yytop; yybottom++)
720 {
721 int yybot = *yybottom;
722 YYFPRINTF (stderr, " %d", yybot);
723 }
724 YYFPRINTF (stderr, "\n");
725 }
726
727 # define YY_STACK_PRINT(Bottom, Top) \
728 do { \
729 if (yydebug) \
730 yy_stack_print ((Bottom), (Top)); \
731 } while (0)
732
733
734 /*------------------------------------------------.
735 | Report that the YYRULE is going to be reduced. |
736 `------------------------------------------------*/
737
738 ]b4_function_define([yy_reduce_print], [static void],
739 [[yytype_int16 *yyssp], [yyssp]],
740 [[YYSTYPE *yyvsp], [yyvsp]],
741 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
742 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
743 b4_parse_param]))[
744 {
745 unsigned long int yylno = yyrline[yyrule];
746 int yynrhs = yyr2[yyrule];
747 int yyi;
748 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
749 yyrule - 1, yylno);
750 /* The symbols being reduced. */
751 for (yyi = 0; yyi < yynrhs; yyi++)
752 {
753 YYFPRINTF (stderr, " $%d = ", yyi + 1);
754 yy_symbol_print (stderr,
755 yystos[yyssp[yyi + 1 - yynrhs]],
756 &]b4_rhs_value(yynrhs, yyi + 1)[
757 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
758 b4_user_args[);
759 YYFPRINTF (stderr, "\n");
760 }
761 }
762
763 # define YY_REDUCE_PRINT(Rule) \
764 do { \
765 if (yydebug) \
766 yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
767 } while (0)
768
769 /* Nonzero means print parse trace. It is left uninitialized so that
770 multiple parsers can coexist. */
771 int yydebug;
772 #else /* !]b4_api_PREFIX[DEBUG */
773 # define YYDPRINTF(Args)
774 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
775 # define YY_STACK_PRINT(Bottom, Top)
776 # define YY_REDUCE_PRINT(Rule)
777 #endif /* !]b4_api_PREFIX[DEBUG */
778
779
780 /* YYINITDEPTH -- initial size of the parser's stacks. */
781 #ifndef YYINITDEPTH
782 # define YYINITDEPTH ]b4_stack_depth_init[
783 #endif
784
785 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
786 if the built-in stack extension method is used).
787
788 Do not make this value too large; the results are undefined if
789 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
790 evaluated with infinite-precision integer arithmetic. */
791
792 #ifndef YYMAXDEPTH
793 # define YYMAXDEPTH ]b4_stack_depth_max[
794 #endif]b4_lac_if([[
795
796 /* Given a state stack such that *YYBOTTOM is its bottom, such that
797 *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty
798 stack, and such that *YYCAPACITY is the maximum number of elements it
799 can hold without a reallocation, make sure there is enough room to
800 store YYADD more elements. If not, allocate a new stack using
801 YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM,
802 *YYTOP, and *YYCAPACITY to reflect the new capacity and memory
803 location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack
804 using YYSTACK_FREE. Return 0 if successful or if no reallocation is
805 required. Return 1 if memory is exhausted. */
806 static int
807 yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
808 #if ]b4_api_PREFIX[DEBUG
809 char const *yydebug_prefix,
810 char const *yydebug_suffix,
811 #endif
812 yytype_int16 **yybottom,
813 yytype_int16 *yybottom_no_free,
814 yytype_int16 **yytop, yytype_int16 *yytop_empty)
815 {
816 YYSIZE_T yysize_old =
817 *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1;
818 YYSIZE_T yysize_new = yysize_old + yyadd;
819 if (*yycapacity < yysize_new)
820 {
821 YYSIZE_T yyalloc = 2 * yysize_new;
822 yytype_int16 *yybottom_new;
823 /* Use YYMAXDEPTH for maximum stack size given that the stack
824 should never need to grow larger than the main state stack
825 needs to grow without LAC. */
826 if (YYMAXDEPTH < yysize_new)
827 {
828 YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix,
829 yydebug_suffix));
830 return 1;
831 }
832 if (YYMAXDEPTH < yyalloc)
833 yyalloc = YYMAXDEPTH;
834 yybottom_new =
835 (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new);
836 if (!yybottom_new)
837 {
838 YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix,
839 yydebug_suffix));
840 return 1;
841 }
842 if (*yytop != yytop_empty)
843 {
844 YYCOPY (yybottom_new, *yybottom, yysize_old);
845 *yytop = yybottom_new + (yysize_old - 1);
846 }
847 if (*yybottom != yybottom_no_free)
848 YYSTACK_FREE (*yybottom);
849 *yybottom = yybottom_new;
850 *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]),
851 [full], [[
852 YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix,
853 (unsigned long int) yyalloc, yydebug_suffix));]])[
854 }
855 return 0;
856 }
857
858 /* Establish the initial context for the current lookahead if no initial
859 context is currently established.
860
861 We define a context as a snapshot of the parser stacks. We define
862 the initial context for a lookahead as the context in which the
863 parser initially examines that lookahead in order to select a
864 syntactic action. Thus, if the lookahead eventually proves
865 syntactically unacceptable (possibly in a later context reached via a
866 series of reductions), the initial context can be used to determine
867 the exact set of tokens that would be syntactically acceptable in the
868 lookahead's place. Moreover, it is the context after which any
869 further semantic actions would be erroneous because they would be
870 determined by a syntactically unacceptable token.
871
872 YY_LAC_ESTABLISH should be invoked when a reduction is about to be
873 performed in an inconsistent state (which, for the purposes of LAC,
874 includes consistent states that don't know they're consistent because
875 their default reductions have been disabled). Iff there is a
876 lookahead token, it should also be invoked before reporting a syntax
877 error. This latter case is for the sake of the debugging output.
878
879 For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as
880 follows. If no initial context is currently established for the
881 current lookahead, then check if that lookahead can eventually be
882 shifted if syntactic actions continue from the current context.
883 Report a syntax error if it cannot. */
884 #define YY_LAC_ESTABLISH \
885 do { \
886 if (!yy_lac_established) \
887 { \
888 YYDPRINTF ((stderr, \
889 "LAC: initial context established for %s\n", \
890 yytname[yytoken])); \
891 yy_lac_established = 1; \
892 { \
893 int yy_lac_status = \
894 yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \
895 if (yy_lac_status == 2) \
896 goto yyexhaustedlab; \
897 if (yy_lac_status == 1) \
898 goto yyerrlab; \
899 } \
900 } \
901 } while (0)
902
903 /* Discard any previous initial lookahead context because of Event,
904 which may be a lookahead change or an invalidation of the currently
905 established initial context for the current lookahead.
906
907 The most common example of a lookahead change is a shift. An example
908 of both cases is syntax error recovery. That is, a syntax error
909 occurs when the lookahead is syntactically erroneous for the
910 currently established initial context, so error recovery manipulates
911 the parser stacks to try to find a new initial context in which the
912 current lookahead is syntactically acceptable. If it fails to find
913 such a context, it discards the lookahead. */
914 #if ]b4_api_PREFIX[DEBUG
915 # define YY_LAC_DISCARD(Event) \
916 do { \
917 if (yy_lac_established) \
918 { \
919 if (yydebug) \
920 YYFPRINTF (stderr, "LAC: initial context discarded due to " \
921 Event "\n"); \
922 yy_lac_established = 0; \
923 } \
924 } while (0)
925 #else
926 # define YY_LAC_DISCARD(Event) yy_lac_established = 0
927 #endif
928
929 /* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can
930 eventually (after perhaps some reductions) be shifted, return 1 if
931 not, or return 2 if memory is exhausted. As preconditions and
932 postconditions: *YYES_CAPACITY is the allocated size of the array to
933 which *YYES points, and either *YYES = YYESA or *YYES points to an
934 array allocated with YYSTACK_ALLOC. yy_lac may overwrite the
935 contents of either array, alter *YYES and *YYES_CAPACITY, and free
936 any old *YYES other than YYESA. */
937 static int
938 yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
939 YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
940 {
941 yytype_int16 *yyes_prev = yyssp;
942 yytype_int16 *yyesp = yyes_prev;
943 YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken]));
944 if (yytoken == YYUNDEFTOK)
945 {
946 YYDPRINTF ((stderr, " Always Err\n"));
947 return 1;
948 }
949 while (1)
950 {
951 int yyrule = yypact[*yyesp];
952 if (yypact_value_is_default (yyrule)
953 || (yyrule += yytoken) < 0 || YYLAST < yyrule
954 || yycheck[yyrule] != yytoken)
955 {
956 yyrule = yydefact[*yyesp];
957 if (yyrule == 0)
958 {
959 YYDPRINTF ((stderr, " Err\n"));
960 return 1;
961 }
962 }
963 else
964 {
965 yyrule = yytable[yyrule];
966 if (yytable_value_is_error (yyrule))
967 {
968 YYDPRINTF ((stderr, " Err\n"));
969 return 1;
970 }
971 if (0 < yyrule)
972 {
973 YYDPRINTF ((stderr, " S%d\n", yyrule));
974 return 0;
975 }
976 yyrule = -yyrule;
977 }
978 {
979 YYSIZE_T yylen = yyr2[yyrule];
980 YYDPRINTF ((stderr, " R%d", yyrule - 1));
981 if (yyesp != yyes_prev)
982 {
983 YYSIZE_T yysize = yyesp - *yyes + 1;
984 if (yylen < yysize)
985 {
986 yyesp -= yylen;
987 yylen = 0;
988 }
989 else
990 {
991 yylen -= yysize;
992 yyesp = yyes_prev;
993 }
994 }
995 if (yylen)
996 yyesp = yyes_prev -= yylen;
997 }
998 {
999 int yystate;
1000 {
1001 int yylhs = yyr1[yyrule] - YYNTOKENS;
1002 yystate = yypgoto[yylhs] + *yyesp;
1003 if (yystate < 0 || YYLAST < yystate
1004 || yycheck[yystate] != *yyesp)
1005 yystate = yydefgoto[yylhs];
1006 else
1007 yystate = yytable[yystate];
1008 }
1009 if (yyesp == yyes_prev)
1010 {
1011 yyesp = *yyes;
1012 *yyesp = yystate;
1013 }
1014 else
1015 {
1016 if (yy_lac_stack_realloc (yyes_capacity, 1,
1017 #if ]b4_api_PREFIX[DEBUG
1018 " (", ")",
1019 #endif
1020 yyes, yyesa, &yyesp, yyes_prev))
1021 {
1022 YYDPRINTF ((stderr, "\n"));
1023 return 2;
1024 }
1025 *++yyesp = yystate;
1026 }
1027 YYDPRINTF ((stderr, " G%d", yystate));
1028 }
1029 }
1030 }]])[
1031
1032
1033 #if YYERROR_VERBOSE
1034
1035 # ifndef yystrlen
1036 # if defined __GLIBC__ && defined _STRING_H
1037 # define yystrlen strlen
1038 # else
1039 /* Return the length of YYSTR. */
1040 ]b4_function_define([yystrlen], [static YYSIZE_T],
1041 [[const char *yystr], [yystr]])[
1042 {
1043 YYSIZE_T yylen;
1044 for (yylen = 0; yystr[yylen]; yylen++)
1045 continue;
1046 return yylen;
1047 }
1048 # endif
1049 # endif
1050
1051 # ifndef yystpcpy
1052 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
1053 # define yystpcpy stpcpy
1054 # else
1055 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
1056 YYDEST. */
1057 ]b4_function_define([yystpcpy], [static char *],
1058 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
1059 {
1060 char *yyd = yydest;
1061 const char *yys = yysrc;
1062
1063 while ((*yyd++ = *yys++) != '\0')
1064 continue;
1065
1066 return yyd - 1;
1067 }
1068 # endif
1069 # endif
1070
1071 # ifndef yytnamerr
1072 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
1073 quotes and backslashes, so that it's suitable for yyerror. The
1074 heuristic is that double-quoting is unnecessary unless the string
1075 contains an apostrophe, a comma, or backslash (other than
1076 backslash-backslash). YYSTR is taken from yytname. If YYRES is
1077 null, do not copy; instead, return the length of what the result
1078 would have been. */
1079 static YYSIZE_T
1080 yytnamerr (char *yyres, const char *yystr)
1081 {
1082 if (*yystr == '"')
1083 {
1084 YYSIZE_T yyn = 0;
1085 char const *yyp = yystr;
1086
1087 for (;;)
1088 switch (*++yyp)
1089 {
1090 case '\'':
1091 case ',':
1092 goto do_not_strip_quotes;
1093
1094 case '\\':
1095 if (*++yyp != '\\')
1096 goto do_not_strip_quotes;
1097 /* Fall through. */
1098 default:
1099 if (yyres)
1100 yyres[yyn] = *yyp;
1101 yyn++;
1102 break;
1103
1104 case '"':
1105 if (yyres)
1106 yyres[yyn] = '\0';
1107 return yyn;
1108 }
1109 do_not_strip_quotes: ;
1110 }
1111
1112 if (! yyres)
1113 return yystrlen (yystr);
1114
1115 return yystpcpy (yyres, yystr) - yyres;
1116 }
1117 # endif
1118
1119 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
1120 about the unexpected token YYTOKEN for the state stack whose top is
1121 YYSSP.]b4_lac_if([[ In order to see if a particular token T is a
1122 valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[
1123
1124 Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is
1125 not large enough to hold the message. In that case, also set
1126 *YYMSG_ALLOC to the required number of bytes. Return 2 if the
1127 required number of bytes is too large to store]b4_lac_if([[ or if
1128 yy_lac returned 2]])[. */
1129 static int
1130 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
1131 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
1132 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
1133 {
1134 YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
1135 YYSIZE_T yysize = yysize0;
1136 YYSIZE_T yysize1;
1137 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
1138 /* Internationalized format string. */
1139 const char *yyformat = YY_NULL;
1140 /* Arguments of yyformat. */
1141 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
1142 /* Number of reported tokens (one for the "unexpected", one per
1143 "expected"). */
1144 int yycount = 0;
1145
1146 /* There are many possibilities here to consider:
1147 - If this state is a consistent state with a default action, then
1148 the only way this function was invoked is if the default action
1149 is an error action. In that case, don't check for expected
1150 tokens because there are none.
1151 - The only way there can be no lookahead present (in yychar) is if
1152 this state is a consistent state with a default action. Thus,
1153 detecting the absence of a lookahead is sufficient to determine
1154 that there is no unexpected or expected token to report. In that
1155 case, just report a simple "syntax error".
1156 - Don't assume there isn't a lookahead just because this state is a
1157 consistent state with a default action. There might have been a
1158 previous inconsistent state, consistent state with a non-default
1159 action, or user semantic action that manipulated yychar.]b4_lac_if([[
1160 In the first two cases, it might appear that the current syntax
1161 error should have been detected in the previous state when yy_lac
1162 was invoked. However, at that time, there might have been a
1163 different syntax error that discarded a different initial context
1164 during error recovery, leaving behind the current lookahead.]], [[
1165 - Of course, the expected token list depends on states to have
1166 correct lookahead information, and it depends on the parser not
1167 to perform extra reductions after fetching a lookahead from the
1168 scanner and before detecting a syntax error. Thus, state merging
1169 (from LALR or IELR) and default reductions corrupt the expected
1170 token list. However, the list is correct for canonical LR with
1171 one exception: it will still contain any token that will not be
1172 accepted due to an error action in a later state.]])[
1173 */
1174 if (yytoken != YYEMPTY)
1175 {
1176 int yyn = yypact[*yyssp];]b4_lac_if([[
1177 YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[
1178 yyarg[yycount++] = yytname[yytoken];
1179 if (!yypact_value_is_default (yyn))
1180 {]b4_lac_if([], [[
1181 /* Start YYX at -YYN if negative to avoid negative indexes in
1182 YYCHECK. In other words, skip the first -YYN actions for
1183 this state because they are default actions. */
1184 int yyxbegin = yyn < 0 ? -yyn : 0;
1185 /* Stay within bounds of both yycheck and yytname. */
1186 int yychecklim = YYLAST - yyn + 1;
1187 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[
1188 int yyx;]b4_lac_if([[
1189
1190 for (yyx = 0; yyx < YYNTOKENS; ++yyx)
1191 if (yyx != YYTERROR && yyx != YYUNDEFTOK)
1192 {
1193 {
1194 int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity,
1195 yyssp, yyx);
1196 if (yy_lac_status == 2)
1197 return 2;
1198 if (yy_lac_status == 1)
1199 continue;
1200 }]], [[
1201
1202 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
1203 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
1204 && !yytable_value_is_error (yytable[yyx + yyn]))
1205 {]])[
1206 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
1207 {
1208 yycount = 1;
1209 yysize = yysize0;
1210 break;
1211 }
1212 yyarg[yycount++] = yytname[yyx];
1213 yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
1214 if (! (yysize <= yysize1
1215 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1216 return 2;
1217 yysize = yysize1;
1218 }
1219 }]b4_lac_if([[
1220 # if ]b4_api_PREFIX[DEBUG
1221 else if (yydebug)
1222 YYFPRINTF (stderr, "No expected tokens.\n");
1223 # endif]])[
1224 }
1225
1226 switch (yycount)
1227 {
1228 # define YYCASE_(N, S) \
1229 case N: \
1230 yyformat = S; \
1231 break
1232 YYCASE_(0, YY_("syntax error"));
1233 YYCASE_(1, YY_("syntax error, unexpected %s"));
1234 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
1235 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
1236 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
1237 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
1238 # undef YYCASE_
1239 }
1240
1241 yysize1 = yysize + yystrlen (yyformat);
1242 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1243 return 2;
1244 yysize = yysize1;
1245
1246 if (*yymsg_alloc < yysize)
1247 {
1248 *yymsg_alloc = 2 * yysize;
1249 if (! (yysize <= *yymsg_alloc
1250 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
1251 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
1252 return 1;
1253 }
1254
1255 /* Avoid sprintf, as that infringes on the user's name space.
1256 Don't have undefined behavior even if the translation
1257 produced a string with the wrong number of "%s"s. */
1258 {
1259 char *yyp = *yymsg;
1260 int yyi = 0;
1261 while ((*yyp = *yyformat) != '\0')
1262 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1263 {
1264 yyp += yytnamerr (yyp, yyarg[yyi++]);
1265 yyformat += 2;
1266 }
1267 else
1268 {
1269 yyp++;
1270 yyformat++;
1271 }
1272 }
1273 return 0;
1274 }
1275 #endif /* YYERROR_VERBOSE */
1276
1277 ]b4_yydestruct_define[
1278
1279 ]b4_pure_if([], [
1280
1281 b4_declare_scanner_communication_variables])[]b4_push_if([[
1282
1283 struct yypstate
1284 {]b4_declare_parser_state_variables[
1285 /* Used to determine if this is the first time this instance has
1286 been used. */
1287 int yynew;
1288 };]b4_pure_if([], [[
1289
1290 static char yypstate_allocated = 0;]])b4_pull_if([
1291
1292 b4_function_define([[yyparse]], [[int]], b4_parse_param)[
1293 {
1294 return yypull_parse (YY_NULL]m4_ifset([b4_parse_param],
1295 [[, ]b4_args(b4_parse_param)])[);
1296 }
1297
1298 ]b4_function_define([[yypull_parse]], [[int]],
1299 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1300 b4_parse_param]))[
1301 {
1302 int yystatus;
1303 yypstate *yyps_local;]b4_pure_if([[
1304 int yychar;
1305 YYSTYPE yylval;]b4_locations_if([[
1306 YYLTYPE yylloc;]])])[
1307 if (yyps)
1308 yyps_local = yyps;
1309 else
1310 {
1311 yyps_local = yypstate_new ();
1312 if (!yyps_local)
1313 {]b4_pure_if([[
1314 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1315 if (!yypstate_allocated)
1316 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1317 return 2;
1318 }
1319 }
1320 do {
1321 yychar = YYLEX;
1322 yystatus =
1323 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[);
1324 } while (yystatus == YYPUSH_MORE);
1325 if (!yyps)
1326 yypstate_delete (yyps_local);
1327 return yystatus;
1328 }]])[
1329
1330 /* Initialize the parser data structure. */
1331 ]b4_function_define([[yypstate_new]], [[yypstate *]])[
1332 {
1333 yypstate *yyps;]b4_pure_if([], [[
1334 if (yypstate_allocated)
1335 return YY_NULL;]])[
1336 yyps = (yypstate *) malloc (sizeof *yyps);
1337 if (!yyps)
1338 return YY_NULL;
1339 yyps->yynew = 1;]b4_pure_if([], [[
1340 yypstate_allocated = 1;]])[
1341 return yyps;
1342 }
1343
1344 ]b4_function_define([[yypstate_delete]], [[void]],
1345 [[[yypstate *yyps]], [[yyps]]])[
1346 {
1347 #ifndef yyoverflow
1348 /* If the stack was reallocated but the parse did not complete, then the
1349 stack still needs to be freed. */
1350 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1351 YYSTACK_FREE (yyps->yyss);
1352 #endif]b4_lac_if([[
1353 if (!yyps->yynew && yyps->yyes != yyps->yyesa)
1354 YYSTACK_FREE (yyps->yyes);]])[
1355 free (yyps);]b4_pure_if([], [[
1356 yypstate_allocated = 0;]])[
1357 }
1358 ]b4_pure_if([[
1359 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1360 #define yystate yyps->yystate
1361 #define yyerrstatus yyps->yyerrstatus
1362 #define yyssa yyps->yyssa
1363 #define yyss yyps->yyss
1364 #define yyssp yyps->yyssp
1365 #define yyvsa yyps->yyvsa
1366 #define yyvs yyps->yyvs
1367 #define yyvsp yyps->yyvsp]b4_locations_if([[
1368 #define yylsa yyps->yylsa
1369 #define yyls yyps->yyls
1370 #define yylsp yyps->yylsp
1371 #define yyerror_range yyps->yyerror_range]])[
1372 #define yystacksize yyps->yystacksize]b4_lac_if([[
1373 #define yyesa yyps->yyesa
1374 #define yyes yyps->yyes
1375 #define yyes_capacity yyps->yyes_capacity]])[
1376
1377
1378 /*---------------.
1379 | yypush_parse. |
1380 `---------------*/
1381
1382 ]b4_function_define([[yypush_parse]], [[int]],
1383 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1384 [[[int yypushed_char]], [[yypushed_char]]],
1385 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1386 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1387 b4_parse_param]))], [[
1388
1389
1390 /*----------.
1391 | yyparse. |
1392 `----------*/
1393
1394 ]b4_function_define([yyparse], [int], b4_parse_param)])[
1395 {]b4_pure_if([b4_declare_scanner_communication_variables
1396 ])b4_push_if([b4_pure_if([], [[
1397 int yypushed_char = yychar;
1398 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1399 YYLTYPE yypushed_loc = yylloc;]])
1400 ])],
1401 [b4_declare_parser_state_variables
1402 ])b4_lac_if([[
1403 int yy_lac_established = 0;]])[
1404 int yyn;
1405 int yyresult;
1406 /* Lookahead token as an internal (translated) token number. */
1407 int yytoken = 0;
1408 /* The variables used to return semantic value and location from the
1409 action routines. */
1410 YYSTYPE yyval;]b4_locations_if([[
1411 YYLTYPE yyloc;]])[
1412
1413 #if YYERROR_VERBOSE
1414 /* Buffer for error messages, and its allocated size. */
1415 char yymsgbuf[128];
1416 char *yymsg = yymsgbuf;
1417 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1418 #endif
1419
1420 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1421
1422 /* The number of symbols on the RHS of the reduced rule.
1423 Keep to zero when no symbol should be popped. */
1424 int yylen = 0;]b4_push_if([[
1425
1426 if (!yyps->yynew)
1427 {
1428 yyn = yypact[yystate];
1429 goto yyread_pushed_token;
1430 }]])[
1431
1432 yyss = yyssa;
1433 yyvs = yyvsa;]b4_locations_if([[
1434 yyls = yylsa;]])[
1435 yystacksize = YYINITDEPTH;]b4_lac_if([[
1436
1437 yyes = yyesa;
1438 yyes_capacity = sizeof yyesa / sizeof *yyes;
1439 if (YYMAXDEPTH < yyes_capacity)
1440 yyes_capacity = YYMAXDEPTH;]])[
1441
1442 YYDPRINTF ((stderr, "Starting parse\n"));
1443
1444 yystate = 0;
1445 yyerrstatus = 0;
1446 yynerrs = 0;
1447 yychar = YYEMPTY; /* Cause a token to be read. */
1448
1449 /* Initialize stack pointers.
1450 Waste one element of value and location stack
1451 so that they stay on the same level as the state stack.
1452 The wasted elements are never initialized. */
1453 yyssp = yyss;
1454 yyvsp = yyvs;]b4_locations_if([[
1455 yylsp = yyls;
1456
1457 #if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
1458 /* Initialize the default location before parsing starts. */
1459 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1460 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1461 #endif]])
1462 m4_ifdef([b4_initial_action],[
1463 b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [],
1464 [m4_define([b4_at_dollar_used])yylloc])dnl
1465 /* User initialization code. */
1466 b4_user_initial_action
1467 b4_dollar_popdef[]dnl
1468 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1469 ]])dnl
1470 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1471 ]])])dnl
1472 [ goto yysetstate;
1473
1474 /*------------------------------------------------------------.
1475 | yynewstate -- Push a new state, which is found in yystate. |
1476 `------------------------------------------------------------*/
1477 yynewstate:
1478 /* In all cases, when you get here, the value and location stacks
1479 have just been pushed. So pushing a state here evens the stacks. */
1480 yyssp++;
1481
1482 yysetstate:
1483 *yyssp = yystate;
1484
1485 if (yyss + yystacksize - 1 <= yyssp)
1486 {
1487 /* Get the current used size of the three stacks, in elements. */
1488 YYSIZE_T yysize = yyssp - yyss + 1;
1489
1490 #ifdef yyoverflow
1491 {
1492 /* Give user a chance to reallocate the stack. Use copies of
1493 these so that the &'s don't force the real ones into
1494 memory. */
1495 YYSTYPE *yyvs1 = yyvs;
1496 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1497 YYLTYPE *yyls1 = yyls;])[
1498
1499 /* Each stack pointer address is followed by the size of the
1500 data in use in that stack, in bytes. This used to be a
1501 conditional around just the two extra args, but that might
1502 be undefined if yyoverflow is a macro. */
1503 yyoverflow (YY_("memory exhausted"),
1504 &yyss1, yysize * sizeof (*yyssp),
1505 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1506 &yyls1, yysize * sizeof (*yylsp),])[
1507 &yystacksize);
1508 ]b4_locations_if([
1509 yyls = yyls1;])[
1510 yyss = yyss1;
1511 yyvs = yyvs1;
1512 }
1513 #else /* no yyoverflow */
1514 # ifndef YYSTACK_RELOCATE
1515 goto yyexhaustedlab;
1516 # else
1517 /* Extend the stack our own way. */
1518 if (YYMAXDEPTH <= yystacksize)
1519 goto yyexhaustedlab;
1520 yystacksize *= 2;
1521 if (YYMAXDEPTH < yystacksize)
1522 yystacksize = YYMAXDEPTH;
1523
1524 {
1525 yytype_int16 *yyss1 = yyss;
1526 union yyalloc *yyptr =
1527 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1528 if (! yyptr)
1529 goto yyexhaustedlab;
1530 YYSTACK_RELOCATE (yyss_alloc, yyss);
1531 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1532 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1533 # undef YYSTACK_RELOCATE
1534 if (yyss1 != yyssa)
1535 YYSTACK_FREE (yyss1);
1536 }
1537 # endif
1538 #endif /* no yyoverflow */
1539
1540 yyssp = yyss + yysize - 1;
1541 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1542 yylsp = yyls + yysize - 1;])[
1543
1544 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1545 (unsigned long int) yystacksize));
1546
1547 if (yyss + yystacksize - 1 <= yyssp)
1548 YYABORT;
1549 }
1550
1551 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1552
1553 if (yystate == YYFINAL)
1554 YYACCEPT;
1555
1556 goto yybackup;
1557
1558 /*-----------.
1559 | yybackup. |
1560 `-----------*/
1561 yybackup:
1562
1563 /* Do appropriate processing given the current state. Read a
1564 lookahead token if we need one and don't already have one. */
1565
1566 /* First try to decide what to do without reference to lookahead token. */
1567 yyn = yypact[yystate];
1568 if (yypact_value_is_default (yyn))
1569 goto yydefault;
1570
1571 /* Not known => get a lookahead token if don't already have one. */
1572
1573 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1574 if (yychar == YYEMPTY)
1575 {]b4_push_if([[
1576 if (!yyps->yynew)
1577 {]b4_use_push_for_pull_if([], [[
1578 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1579 yyresult = YYPUSH_MORE;
1580 goto yypushreturn;
1581 }
1582 yyps->yynew = 0;]b4_pure_if([], [[
1583 /* Restoring the pushed token is only necessary for the first
1584 yypush_parse invocation since subsequent invocations don't overwrite
1585 it before jumping to yyread_pushed_token. */
1586 yychar = yypushed_char;
1587 yylval = yypushed_val;]b4_locations_if([[
1588 yylloc = yypushed_loc;]])])[
1589 yyread_pushed_token:]])[
1590 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1591 yychar = yypushed_char;
1592 if (yypushed_val)
1593 yylval = *yypushed_val;]b4_locations_if([[
1594 if (yypushed_loc)
1595 yylloc = *yypushed_loc;]])])], [[
1596 yychar = YYLEX;]])[
1597 }
1598
1599 if (yychar <= YYEOF)
1600 {
1601 yychar = yytoken = YYEOF;
1602 YYDPRINTF ((stderr, "Now at end of input.\n"));
1603 }
1604 else
1605 {
1606 yytoken = YYTRANSLATE (yychar);
1607 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1608 }
1609
1610 /* If the proper action on seeing token YYTOKEN is to reduce or to
1611 detect an error, take that action. */
1612 yyn += yytoken;
1613 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[
1614 {
1615 YY_LAC_ESTABLISH;
1616 goto yydefault;
1617 }]], [[
1618 goto yydefault;]])[
1619 yyn = yytable[yyn];
1620 if (yyn <= 0)
1621 {
1622 if (yytable_value_is_error (yyn))
1623 goto yyerrlab;]b4_lac_if([[
1624 YY_LAC_ESTABLISH;]])[
1625 yyn = -yyn;
1626 goto yyreduce;
1627 }
1628
1629 /* Count tokens shifted since error; after three, turn off error
1630 status. */
1631 if (yyerrstatus)
1632 yyerrstatus--;
1633
1634 /* Shift the lookahead token. */
1635 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1636
1637 /* Discard the shifted token. */
1638 yychar = YYEMPTY;]b4_lac_if([[
1639 YY_LAC_DISCARD ("shift");]])[
1640
1641 yystate = yyn;
1642 *++yyvsp = yylval;
1643 ]b4_locations_if([ *++yylsp = yylloc;])[
1644 goto yynewstate;
1645
1646
1647 /*-----------------------------------------------------------.
1648 | yydefault -- do the default action for the current state. |
1649 `-----------------------------------------------------------*/
1650 yydefault:
1651 yyn = yydefact[yystate];
1652 if (yyn == 0)
1653 goto yyerrlab;
1654 goto yyreduce;
1655
1656
1657 /*-----------------------------.
1658 | yyreduce -- Do a reduction. |
1659 `-----------------------------*/
1660 yyreduce:
1661 /* yyn is the number of a rule to reduce with. */
1662 yylen = yyr2[yyn];
1663
1664 /* If YYLEN is nonzero, implement the default value of the action:
1665 `$$ = $1'.
1666
1667 Otherwise, the following line sets YYVAL to garbage.
1668 This behavior is undocumented and Bison
1669 users should not rely upon it. Assigning to YYVAL
1670 unconditionally makes the parser a bit smaller, and it avoids a
1671 GCC warning that YYVAL may be used uninitialized. */
1672 yyval = yyvsp[1-yylen];
1673
1674 ]b4_locations_if(
1675 [[ /* Default location. */
1676 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1677 YY_REDUCE_PRINT (yyn);]b4_lac_if([[
1678 {
1679 int yychar_backup = yychar;
1680 switch (yyn)
1681 {
1682 ]b4_user_actions[
1683 default: break;
1684 }
1685 if (yychar_backup != yychar)
1686 YY_LAC_DISCARD ("yychar change");
1687 }]], [[
1688 switch (yyn)
1689 {
1690 ]b4_user_actions[
1691 default: break;
1692 }]])[
1693 /* User semantic actions sometimes alter yychar, and that requires
1694 that yytoken be updated with the new translation. We take the
1695 approach of translating immediately before every use of yytoken.
1696 One alternative is translating here after every semantic action,
1697 but that translation would be missed if the semantic action invokes
1698 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1699 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
1700 incorrect destructor might then be invoked immediately. In the
1701 case of YYERROR or YYBACKUP, subsequent parser actions might lead
1702 to an incorrect destructor call or verbose syntax error message
1703 before the lookahead is translated. */
1704 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1705
1706 YYPOPSTACK (yylen);
1707 yylen = 0;
1708 YY_STACK_PRINT (yyss, yyssp);
1709
1710 *++yyvsp = yyval;]b4_locations_if([
1711 *++yylsp = yyloc;])[
1712
1713 /* Now `shift' the result of the reduction. Determine what state
1714 that goes to, based on the state we popped back to and the rule
1715 number reduced by. */
1716
1717 yyn = yyr1[yyn];
1718
1719 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1720 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1721 yystate = yytable[yystate];
1722 else
1723 yystate = yydefgoto[yyn - YYNTOKENS];
1724
1725 goto yynewstate;
1726
1727
1728 /*--------------------------------------.
1729 | yyerrlab -- here on detecting error. |
1730 `--------------------------------------*/
1731 yyerrlab:
1732 /* Make sure we have latest lookahead translation. See comments at
1733 user semantic actions for why this is necessary. */
1734 yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
1735
1736 /* If not already recovering from an error, report this error. */
1737 if (!yyerrstatus)
1738 {
1739 ++yynerrs;
1740 #if ! YYERROR_VERBOSE
1741 yyerror (]b4_yyerror_args[YY_("syntax error"));
1742 #else
1743 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[
1744 yyesa, &yyes, &yyes_capacity, \]])[
1745 yyssp, yytoken)
1746 {
1747 char const *yymsgp = YY_("syntax error");
1748 int yysyntax_error_status;]b4_lac_if([[
1749 if (yychar != YYEMPTY)
1750 YY_LAC_ESTABLISH;]])[
1751 yysyntax_error_status = YYSYNTAX_ERROR;
1752 if (yysyntax_error_status == 0)
1753 yymsgp = yymsg;
1754 else if (yysyntax_error_status == 1)
1755 {
1756 if (yymsg != yymsgbuf)
1757 YYSTACK_FREE (yymsg);
1758 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1759 if (!yymsg)
1760 {
1761 yymsg = yymsgbuf;
1762 yymsg_alloc = sizeof yymsgbuf;
1763 yysyntax_error_status = 2;
1764 }
1765 else
1766 {
1767 yysyntax_error_status = YYSYNTAX_ERROR;
1768 yymsgp = yymsg;
1769 }
1770 }
1771 yyerror (]b4_yyerror_args[yymsgp);
1772 if (yysyntax_error_status == 2)
1773 goto yyexhaustedlab;
1774 }
1775 # undef YYSYNTAX_ERROR
1776 #endif
1777 }
1778
1779 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
1780
1781 if (yyerrstatus == 3)
1782 {
1783 /* If just tried and failed to reuse lookahead token after an
1784 error, discard it. */
1785
1786 if (yychar <= YYEOF)
1787 {
1788 /* Return failure if at end of input. */
1789 if (yychar == YYEOF)
1790 YYABORT;
1791 }
1792 else
1793 {
1794 yydestruct ("Error: discarding",
1795 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1796 yychar = YYEMPTY;
1797 }
1798 }
1799
1800 /* Else will try to reuse lookahead token after shifting the error
1801 token. */
1802 goto yyerrlab1;
1803
1804
1805 /*---------------------------------------------------.
1806 | yyerrorlab -- error raised explicitly by YYERROR. |
1807 `---------------------------------------------------*/
1808 yyerrorlab:
1809
1810 /* Pacify compilers like GCC when the user code never invokes
1811 YYERROR and the label yyerrorlab therefore never appears in user
1812 code. */
1813 if (/*CONSTCOND*/ 0)
1814 goto yyerrorlab;
1815
1816 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
1817 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1818 this YYERROR. */
1819 YYPOPSTACK (yylen);
1820 yylen = 0;
1821 YY_STACK_PRINT (yyss, yyssp);
1822 yystate = *yyssp;
1823 goto yyerrlab1;
1824
1825
1826 /*-------------------------------------------------------------.
1827 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1828 `-------------------------------------------------------------*/
1829 yyerrlab1:
1830 yyerrstatus = 3; /* Each real token shifted decrements this. */
1831
1832 for (;;)
1833 {
1834 yyn = yypact[yystate];
1835 if (!yypact_value_is_default (yyn))
1836 {
1837 yyn += YYTERROR;
1838 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1839 {
1840 yyn = yytable[yyn];
1841 if (0 < yyn)
1842 break;
1843 }
1844 }
1845
1846 /* Pop the current state because it cannot handle the error token. */
1847 if (yyssp == yyss)
1848 YYABORT;
1849
1850 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
1851 yydestruct ("Error: popping",
1852 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1853 YYPOPSTACK (1);
1854 yystate = *yyssp;
1855 YY_STACK_PRINT (yyss, yyssp);
1856 }]b4_lac_if([[
1857
1858 /* If the stack popping above didn't lose the initial context for the
1859 current lookahead token, the shift below will for sure. */
1860 YY_LAC_DISCARD ("error recovery");]])[
1861
1862 *++yyvsp = yylval;
1863 ]b4_locations_if([[
1864 yyerror_range[2] = yylloc;
1865 /* Using YYLLOC is tempting, but would change the location of
1866 the lookahead. YYLOC is available though. */
1867 YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1868 *++yylsp = yyloc;]])[
1869
1870 /* Shift the error token. */
1871 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1872
1873 yystate = yyn;
1874 goto yynewstate;
1875
1876
1877 /*-------------------------------------.
1878 | yyacceptlab -- YYACCEPT comes here. |
1879 `-------------------------------------*/
1880 yyacceptlab:
1881 yyresult = 0;
1882 goto yyreturn;
1883
1884 /*-----------------------------------.
1885 | yyabortlab -- YYABORT comes here. |
1886 `-----------------------------------*/
1887 yyabortlab:
1888 yyresult = 1;
1889 goto yyreturn;
1890
1891 #if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[
1892 /*-------------------------------------------------.
1893 | yyexhaustedlab -- memory exhaustion comes here. |
1894 `-------------------------------------------------*/
1895 yyexhaustedlab:
1896 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1897 yyresult = 2;
1898 /* Fall through. */
1899 #endif
1900
1901 yyreturn:
1902 if (yychar != YYEMPTY)
1903 {
1904 /* Make sure we have latest lookahead translation. See comments at
1905 user semantic actions for why this is necessary. */
1906 yytoken = YYTRANSLATE (yychar);
1907 yydestruct ("Cleanup: discarding lookahead",
1908 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1909 }
1910 /* Do not reclaim the symbols of the rule which action triggered
1911 this YYABORT or YYACCEPT. */
1912 YYPOPSTACK (yylen);
1913 YY_STACK_PRINT (yyss, yyssp);
1914 while (yyssp != yyss)
1915 {
1916 yydestruct ("Cleanup: popping",
1917 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1918 YYPOPSTACK (1);
1919 }
1920 #ifndef yyoverflow
1921 if (yyss != yyssa)
1922 YYSTACK_FREE (yyss);
1923 #endif]b4_lac_if([[
1924 if (yyes != yyesa)
1925 YYSTACK_FREE (yyes);]])b4_push_if([[
1926 yyps->yynew = 1;
1927
1928 yypushreturn:]])[
1929 #if YYERROR_VERBOSE
1930 if (yymsg != yymsgbuf)
1931 YYSTACK_FREE (yymsg);
1932 #endif
1933 return yyresult;
1934 }
1935 ]b4_epilogue[]dnl
1936 b4_defines_if(
1937 [@output(b4_spec_defines_file@)@
1938 b4_copyright([Bison interface for Yacc-like parsers in C])[
1939
1940 ]b4_shared_declarations[
1941 ]])dnl b4_defines_if
1942 m4_divert_pop(0)
1943 m4_popdef([b4_copyright_years])
bison