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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 [$2])])
81
82
83 # b4_yyerror_args
84 # ---------------
85 # Arguments passed to yyerror: user args plus yylloc.
86 m4_define([b4_yyerror_args],
87 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
88 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
89
90
91 # b4_lex_param
92 # ------------
93 # Accumulate in b4_lex_param all the yylex arguments.
94 # b4_lex_param arrives quoted twice, but we want to keep only one level.
95 m4_define([b4_lex_param],
96 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
97 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
98 m4_ifdef([b4_lex_param], b4_lex_param)))
99
100
101 ## ------------ ##
102 ## Data Types. ##
103 ## ------------ ##
104
105 # b4_int_type(MIN, MAX)
106 # ---------------------
107 # Return the smallest int type able to handle numbers ranging from
108 # MIN to MAX (included). Overwrite the version from c.m4, which
109 # uses only C89 types, so that the user can override the shorter
110 # types, and so that pre-C89 compilers are handled correctly.
111 m4_define([b4_int_type],
112 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
113 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
114
115 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
116 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
117
118 m4_eval([0 <= $1]), [1], [unsigned int],
119
120 [int])])
121
122
123 ## ----------------- ##
124 ## Semantic Values. ##
125 ## ----------------- ##
126
127
128 # b4_lhs_value([TYPE])
129 # --------------------
130 # Expansion of $<TYPE>$.
131 m4_define([b4_lhs_value],
132 [b4_symbol_value(yyval, [$1])])
133
134
135 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
136 # --------------------------------------
137 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
138 # symbols on RHS.
139 m4_define([b4_rhs_value],
140 [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
141
142
143
144 ## ----------- ##
145 ## Locations. ##
146 ## ----------- ##
147
148 # b4_lhs_location()
149 # -----------------
150 # Expansion of @$.
151 m4_define([b4_lhs_location],
152 [(yyloc)])
153
154
155 # b4_rhs_location(RULE-LENGTH, NUM)
156 # ---------------------------------
157 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
158 # on RHS.
159 m4_define([b4_rhs_location],
160 [(yylsp@{b4_subtract([$2], [$1])@})])
161
162
163 ## ------------------ ##
164 ## Parser variables. ##
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 thru 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 ## --------------------------------------------------------- ##
231 ## Defining symbol actions, e.g., printers and destructors. ##
232 ## --------------------------------------------------------- ##
233
234 # We do want M4 expansion after # for CPP macros.
235 m4_changecom()
236 m4_divert_push(0)dnl
237 @output(b4_parser_file_name@)@
238 b4_copyright([Bison implementation for Yacc-like parsers in C])[
239
240 /* C LALR(1) parser skeleton written by Richard Stallman, by
241 simplifying the original so-called "semantic" parser. */
242
243 /* All symbols defined below should begin with yy or YY, to avoid
244 infringing on user name space. This should be done even for local
245 variables, as they might otherwise be expanded by user macros.
246 There are some unavoidable exceptions within include files to
247 define necessary library symbols; they are noted "INFRINGES ON
248 USER NAME SPACE" below. */
249
250 ]b4_identification
251 b4_percent_code_get([[top]])[]dnl
252 m4_if(b4_prefix, [yy], [],
253 [[/* Substitute the variable and function names. */]b4_pull_if([[
254 #define yyparse ]b4_prefix[parse]])b4_push_if([[
255 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
256 #define yypull_parse ]b4_prefix[pull_parse]])[
257 #define yypstate_new ]b4_prefix[pstate_new
258 #define yypstate_delete ]b4_prefix[pstate_delete
259 #define yypstate ]b4_prefix[pstate]])[
260 #define yylex ]b4_prefix[lex
261 #define yyerror ]b4_prefix[error
262 #define yylval ]b4_prefix[lval
263 #define yychar ]b4_prefix[char
264 #define yydebug ]b4_prefix[debug
265 #define yynerrs ]b4_prefix[nerrs
266 ]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
267
268 /* Copy the first part of user declarations. */
269 ]b4_user_pre_prologue[
270
271 /* Enabling traces. */
272 #ifndef YYDEBUG
273 # define YYDEBUG ]b4_parse_trace_if([1], [0])[
274 #endif
275
276 /* Enabling verbose error messages. */
277 #ifdef YYERROR_VERBOSE
278 # undef YYERROR_VERBOSE
279 # define YYERROR_VERBOSE 1
280 #else
281 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
282 #endif
283
284 /* Enabling the token table. */
285 #ifndef YYTOKEN_TABLE
286 # define YYTOKEN_TABLE ]b4_token_table[
287 #endif
288
289 ]b4_percent_code_get([[requires]])[]dnl
290
291 b4_token_enums_defines(b4_tokens)[
292
293 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
294 ]m4_ifdef([b4_stype],
295 [[typedef union ]b4_union_name[
296 {
297 ]b4_user_stype[
298 } YYSTYPE;
299 # define YYSTYPE_IS_TRIVIAL 1]],
300 [m4_if(b4_tag_seen_flag, 0,
301 [[typedef int YYSTYPE;
302 # define YYSTYPE_IS_TRIVIAL 1]])])[
303 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
304 # define YYSTYPE_IS_DECLARED 1
305 #endif]b4_locations_if([[
306
307 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
308 typedef struct YYLTYPE
309 {
310 int first_line;
311 int first_column;
312 int last_line;
313 int last_column;
314 } YYLTYPE;
315 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
316 # define YYLTYPE_IS_DECLARED 1
317 # define YYLTYPE_IS_TRIVIAL 1
318 #endif]])b4_push_if([[
319
320 #ifndef YYPUSH_DECLS
321 # define YYPUSH_DECLS
322 struct yypstate;
323 typedef struct yypstate yypstate;
324 enum { YYPUSH_MORE = 4 };
325
326 ]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
327 ])b4_c_function_decl([[yypush_parse]], [[int]],
328 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
329 [[[int yypushed_char]], [[yypushed_char]]],
330 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
331 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
332 b4_parse_param]))
333 b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
334 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
335 b4_parse_param]))])
336 b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
337 b4_c_function_decl([[yypstate_delete]], [[void]],
338 [[[yypstate *yyps]], [[yyps]]])[
339 #endif]])
340
341 b4_percent_code_get([[provides]])[]dnl
342
343 [/* Copy the second part of user declarations. */
344 ]b4_user_post_prologue
345 b4_percent_code_get[]dnl
346
347 [#ifdef short
348 # undef short
349 #endif
350
351 #ifdef YYTYPE_UINT8
352 typedef YYTYPE_UINT8 yytype_uint8;
353 #else
354 typedef unsigned char yytype_uint8;
355 #endif
356
357 #ifdef YYTYPE_INT8
358 typedef YYTYPE_INT8 yytype_int8;
359 #elif ]b4_c_modern[
360 typedef signed char yytype_int8;
361 #else
362 typedef short int yytype_int8;
363 #endif
364
365 #ifdef YYTYPE_UINT16
366 typedef YYTYPE_UINT16 yytype_uint16;
367 #else
368 typedef unsigned short int yytype_uint16;
369 #endif
370
371 #ifdef YYTYPE_INT16
372 typedef YYTYPE_INT16 yytype_int16;
373 #else
374 typedef short int yytype_int16;
375 #endif
376
377 #ifndef YYSIZE_T
378 # ifdef __SIZE_TYPE__
379 # define YYSIZE_T __SIZE_TYPE__
380 # elif defined size_t
381 # define YYSIZE_T size_t
382 # elif ! defined YYSIZE_T && ]b4_c_modern[
383 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
384 # define YYSIZE_T size_t
385 # else
386 # define YYSIZE_T unsigned int
387 # endif
388 #endif
389
390 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
391
392 #ifndef YY_
393 # if defined YYENABLE_NLS && YYENABLE_NLS
394 # if ENABLE_NLS
395 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
396 # define YY_(msgid) dgettext ("bison-runtime", msgid)
397 # endif
398 # endif
399 # ifndef YY_
400 # define YY_(msgid) msgid
401 # endif
402 #endif
403
404 /* Suppress unused-variable warnings by "using" E. */
405 #if ! defined lint || defined __GNUC__
406 # define YYUSE(e) ((void) (e))
407 #else
408 # define YYUSE(e) /* empty */
409 #endif
410
411 /* Identity function, used to suppress warnings about constant conditions. */
412 #ifndef lint
413 # define YYID(n) (n)
414 #else
415 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
416 {
417 return yyi;
418 }
419 #endif
420
421 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
422
423 /* The parser invokes alloca or malloc; define the necessary symbols. */]dnl
424 b4_push_if([], [b4_lac_if([], [[
425
426 # ifdef YYSTACK_USE_ALLOCA
427 # if YYSTACK_USE_ALLOCA
428 # ifdef __GNUC__
429 # define YYSTACK_ALLOC __builtin_alloca
430 # elif defined __BUILTIN_VA_ARG_INCR
431 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
432 # elif defined _AIX
433 # define YYSTACK_ALLOC __alloca
434 # elif defined _MSC_VER
435 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
436 # define alloca _alloca
437 # else
438 # define YYSTACK_ALLOC alloca
439 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && ]b4_c_modern[
440 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
441 # ifndef EXIT_SUCCESS
442 # define EXIT_SUCCESS 0
443 # endif
444 # endif
445 # endif
446 # endif
447 # endif]])])[
448
449 # ifdef YYSTACK_ALLOC
450 /* Pacify GCC's `empty if-body' warning. */
451 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
452 # ifndef YYSTACK_ALLOC_MAXIMUM
453 /* The OS might guarantee only one guard page at the bottom of the stack,
454 and a page size can be as small as 4096 bytes. So we cannot safely
455 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
456 to allow for a few compiler-allocated temporary stack slots. */
457 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
458 # endif
459 # else
460 # define YYSTACK_ALLOC YYMALLOC
461 # define YYSTACK_FREE YYFREE
462 # ifndef YYSTACK_ALLOC_MAXIMUM
463 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
464 # endif
465 # if (defined __cplusplus && ! defined EXIT_SUCCESS \
466 && ! ((defined YYMALLOC || defined malloc) \
467 && (defined YYFREE || defined free)))
468 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
469 # ifndef EXIT_SUCCESS
470 # define EXIT_SUCCESS 0
471 # endif
472 # endif
473 # ifndef YYMALLOC
474 # define YYMALLOC malloc
475 # if ! defined malloc && ! defined EXIT_SUCCESS && ]b4_c_modern[
476 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
477 # endif
478 # endif
479 # ifndef YYFREE
480 # define YYFREE free
481 # if ! defined free && ! defined EXIT_SUCCESS && ]b4_c_modern[
482 void free (void *); /* INFRINGES ON USER NAME SPACE */
483 # endif
484 # endif
485 # endif]b4_lac_if([[
486 # define YYCOPY_NEEDED 1]])[
487 #endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[
488
489
490 #if (! defined yyoverflow \
491 && (! defined __cplusplus \
492 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
493 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
494
495 /* A type that is properly aligned for any stack member. */
496 union yyalloc
497 {
498 yytype_int16 yyss_alloc;
499 YYSTYPE yyvs_alloc;]b4_locations_if([
500 YYLTYPE yyls_alloc;])[
501 };
502
503 /* The size of the maximum gap between one aligned stack and the next. */
504 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
505
506 /* The size of an array large to enough to hold all stacks, each with
507 N elements. */
508 ]b4_locations_if(
509 [# define YYSTACK_BYTES(N) \
510 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
511 + 2 * YYSTACK_GAP_MAXIMUM)],
512 [# define YYSTACK_BYTES(N) \
513 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
514 + YYSTACK_GAP_MAXIMUM)])[
515
516 # define YYCOPY_NEEDED 1
517
518 /* Relocate STACK from its old location to the new one. The
519 local variables YYSIZE and YYSTACKSIZE give the old and new number of
520 elements in the stack, and YYPTR gives the new location of the
521 stack. Advance YYPTR to a properly aligned location for the next
522 stack. */
523 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
524 do \
525 { \
526 YYSIZE_T yynewbytes; \
527 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
528 Stack = &yyptr->Stack_alloc; \
529 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
530 yyptr += yynewbytes / sizeof (*yyptr); \
531 } \
532 while (YYID (0))
533
534 #endif
535
536 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED
537 /* Copy COUNT objects from FROM to TO. The source and destination do
538 not overlap. */
539 # ifndef YYCOPY
540 # if defined __GNUC__ && 1 < __GNUC__
541 # define YYCOPY(To, From, Count) \
542 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
543 # else
544 # define YYCOPY(To, From, Count) \
545 do \
546 { \
547 YYSIZE_T yyi; \
548 for (yyi = 0; yyi < (Count); yyi++) \
549 (To)[yyi] = (From)[yyi]; \
550 } \
551 while (YYID (0))
552 # endif
553 # endif
554 #endif /* !YYCOPY_NEEDED */
555
556 /* YYFINAL -- State number of the termination state. */
557 #define YYFINAL ]b4_final_state_number[
558 /* YYLAST -- Last index in YYTABLE. */
559 #define YYLAST ]b4_last[
560
561 /* YYNTOKENS -- Number of terminals. */
562 #define YYNTOKENS ]b4_tokens_number[
563 /* YYNNTS -- Number of nonterminals. */
564 #define YYNNTS ]b4_nterms_number[
565 /* YYNRULES -- Number of rules. */
566 #define YYNRULES ]b4_rules_number[
567 /* YYNSTATES -- Number of states. */
568 #define YYNSTATES ]b4_states_number[
569
570 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
571 by yylex, with out-of-bounds checking. */
572 #define YYUNDEFTOK ]b4_undef_token_number[
573 #define YYMAXUTOK ]b4_user_token_number_max[
574
575 #define YYTRANSLATE(YYX) \
576 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
577
578 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
579 as returned by yylex, without out-of-bounds checking. */
580 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
581 {
582 ]b4_translate[
583 };
584
585 #if YYDEBUG
586 ]b4_integral_parser_table_define([rline], [b4_rline],
587 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
588 #endif
589
590 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
591 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
592 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
593 static const char *const yytname[] =
594 {
595 ]b4_tname[
596 };
597 #endif
598
599 # ifdef YYPRINT
600 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
601 (internal) symbol number NUM (which must be that of a token). */
602 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
603 {
604 ]b4_toknum[
605 };
606 # endif
607
608 #define YYPACT_NINF ]b4_pact_ninf[
609
610 #define yypact_value_is_default(yystate) \
611 ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
612
613 #define YYTABLE_NINF ]b4_table_ninf[
614
615 #define yytable_value_is_error(yytable_value) \
616 ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
617
618 ]b4_parser_tables_define[
619
620 #define yyerrok (yyerrstatus = 0)
621 #define yyclearin (yychar = YYEMPTY)
622 #define YYEMPTY (-2)
623 #define YYEOF 0
624
625 #define YYACCEPT goto yyacceptlab
626 #define YYABORT goto yyabortlab
627 #define YYERROR goto yyerrorlab
628
629
630 /* Like YYERROR except do call yyerror. This remains here temporarily
631 to ease the transition to the new meaning of YYERROR, for GCC.
632 Once GCC version 2 has supplanted version 1, this can go. However,
633 YYFAIL appears to be in use. Nevertheless, it is formally deprecated
634 in Bison 2.4.2's NEWS entry, where a plan to phase it out is
635 discussed. */
636
637 #define YYFAIL goto yyerrlab
638 #if defined YYFAIL
639 /* This is here to suppress warnings from the GCC cpp's
640 -Wunused-macros. Normally we don't worry about that warning, but
641 some users do, and we want to make it easy for users to remove
642 YYFAIL uses, which will produce warnings from Bison 2.5. */
643 #endif
644
645 #define YYRECOVERING() (!!yyerrstatus)
646
647 #define YYBACKUP(Token, Value) \
648 do \
649 if (yychar == YYEMPTY) \
650 { \
651 yychar = (Token); \
652 yylval = (Value); \
653 YYPOPSTACK (yylen); \
654 yystate = *yyssp; \]b4_lac_if([[
655 YY_LAC_DISCARD ("YYBACKUP"); \]])[
656 goto yybackup; \
657 } \
658 else \
659 { \
660 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
661 YYERROR; \
662 } \
663 while (YYID (0))
664
665
666 #define YYTERROR 1
667 #define YYERRCODE 256
668
669
670 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
671 If N is 0, then set CURRENT to the empty location which ends
672 the previous symbol: RHS[0] (always defined). */
673
674 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
675 #ifndef YYLLOC_DEFAULT
676 # define YYLLOC_DEFAULT(Current, Rhs, N) \
677 do \
678 if (YYID (N)) \
679 { \
680 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
681 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
682 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
683 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
684 } \
685 else \
686 { \
687 (Current).first_line = (Current).last_line = \
688 YYRHSLOC (Rhs, 0).last_line; \
689 (Current).first_column = (Current).last_column = \
690 YYRHSLOC (Rhs, 0).last_column; \
691 } \
692 while (YYID (0))
693 #endif]b4_locations_if([[
694
695
696 /* YY_LOCATION_PRINT -- Print the location on the stream.
697 This macro was not mandated originally: define only if we know
698 we won't break user code: when these are the locations we know. */
699
700 #ifndef YY_LOCATION_PRINT
701 # if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
702 # define YY_LOCATION_PRINT(File, Loc) \
703 fprintf (File, "%d.%d-%d.%d", \
704 (Loc).first_line, (Loc).first_column, \
705 (Loc).last_line, (Loc).last_column)
706 # else
707 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
708 # endif
709 #endif]], [[
710
711
712 /* This macro is provided for backward compatibility. */
713
714 #ifndef YY_LOCATION_PRINT
715 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
716 #endif]])[
717
718
719 /* YYLEX -- calling `yylex' with the right arguments. */
720
721 #ifdef YYLEX_PARAM
722 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
723 #else
724 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
725 #endif
726
727 /* Enable debugging if requested. */
728 #if YYDEBUG
729
730 # ifndef YYFPRINTF
731 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
732 # define YYFPRINTF fprintf
733 # endif
734
735 # define YYDPRINTF(Args) \
736 do { \
737 if (yydebug) \
738 YYFPRINTF Args; \
739 } while (YYID (0))
740
741 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
742 do { \
743 if (yydebug) \
744 { \
745 YYFPRINTF (stderr, "%s ", Title); \
746 yy_symbol_print (stderr, \
747 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
748 YYFPRINTF (stderr, "\n"); \
749 } \
750 } while (YYID (0))
751
752 ]b4_yy_symbol_print_generate([b4_c_function_def])[
753
754 /*------------------------------------------------------------------.
755 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
756 | TOP (included). |
757 `------------------------------------------------------------------*/
758
759 ]b4_c_function_def([yy_stack_print], [static void],
760 [[yytype_int16 *yybottom], [yybottom]],
761 [[yytype_int16 *yytop], [yytop]])[
762 {
763 YYFPRINTF (stderr, "Stack now");
764 for (; yybottom <= yytop; yybottom++)
765 {
766 int yybot = *yybottom;
767 YYFPRINTF (stderr, " %d", yybot);
768 }
769 YYFPRINTF (stderr, "\n");
770 }
771
772 # define YY_STACK_PRINT(Bottom, Top) \
773 do { \
774 if (yydebug) \
775 yy_stack_print ((Bottom), (Top)); \
776 } while (YYID (0))
777
778
779 /*------------------------------------------------.
780 | Report that the YYRULE is going to be reduced. |
781 `------------------------------------------------*/
782
783 ]b4_c_function_def([yy_reduce_print], [static void],
784 [[yytype_int16 *yyssp], [yyssp]],
785 [[YYSTYPE *yyvsp], [yyvsp]],
786 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
787 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
788 b4_parse_param]))[
789 {
790 unsigned long int yylno = yyrline[yyrule];
791 int yynrhs = yyr2[yyrule];
792 int yyi;
793 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
794 yyrule - 1, yylno);
795 /* The symbols being reduced. */
796 for (yyi = 0; yyi < yynrhs; yyi++)
797 {
798 YYFPRINTF (stderr, " $%d = ", yyi + 1);
799 yy_symbol_print (stderr,
800 yystos[yyssp[yyi + 1 - yynrhs]],
801 &]b4_rhs_value(yynrhs, yyi + 1)[
802 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
803 b4_user_args[);
804 YYFPRINTF (stderr, "\n");
805 }
806 }
807
808 # define YY_REDUCE_PRINT(Rule) \
809 do { \
810 if (yydebug) \
811 yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
812 } while (YYID (0))
813
814 /* Nonzero means print parse trace. It is left uninitialized so that
815 multiple parsers can coexist. */
816 int yydebug;
817 #else /* !YYDEBUG */
818 # define YYDPRINTF(Args)
819 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
820 # define YY_STACK_PRINT(Bottom, Top)
821 # define YY_REDUCE_PRINT(Rule)
822 #endif /* !YYDEBUG */
823
824
825 /* YYINITDEPTH -- initial size of the parser's stacks. */
826 #ifndef YYINITDEPTH
827 # define YYINITDEPTH ]b4_stack_depth_init[
828 #endif
829
830 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
831 if the built-in stack extension method is used).
832
833 Do not make this value too large; the results are undefined if
834 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
835 evaluated with infinite-precision integer arithmetic. */
836
837 #ifndef YYMAXDEPTH
838 # define YYMAXDEPTH ]b4_stack_depth_max[
839 #endif]b4_lac_if([[
840
841 /* Given a state stack such that *YYBOTTOM is its bottom, such that
842 *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty
843 stack, and such that *YYCAPACITY is the maximum number of elements it
844 can hold without a reallocation, make sure there is enough room to
845 store YYADD more elements. If not, allocate a new stack using
846 YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM,
847 *YYTOP, and *YYCAPACITY to reflect the new capacity and memory
848 location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack
849 using YYSTACK_FREE. Return 0 if successful or if no reallocation is
850 required. Return 1 if memory is exhausted. */
851 static int
852 yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
853 #if YYDEBUG
854 char const *yydebug_prefix,
855 char const *yydebug_suffix,
856 #endif
857 yytype_int16 **yybottom,
858 yytype_int16 *yybottom_no_free,
859 yytype_int16 **yytop, yytype_int16 *yytop_empty)
860 {
861 YYSIZE_T yysize_old =
862 *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1;
863 YYSIZE_T yysize_new = yysize_old + yyadd;
864 if (*yycapacity < yysize_new)
865 {
866 YYSIZE_T yyalloc = 2 * yysize_new;
867 yytype_int16 *yybottom_new;
868 /* Use YYMAXDEPTH for maximum stack size given that the stack
869 should never need to grow larger than the main state stack
870 needs to grow without LAC. */
871 if (YYMAXDEPTH < yysize_new)
872 {
873 YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix,
874 yydebug_suffix));
875 return 1;
876 }
877 if (YYMAXDEPTH < yyalloc)
878 yyalloc = YYMAXDEPTH;
879 yybottom_new =
880 (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new);
881 if (!yybottom_new)
882 {
883 YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix,
884 yydebug_suffix));
885 return 1;
886 }
887 if (*yytop != yytop_empty)
888 {
889 YYCOPY (yybottom_new, *yybottom, yysize_old);
890 *yytop = yybottom_new + (yysize_old - 1);
891 }
892 if (*yybottom != yybottom_no_free)
893 YYSTACK_FREE (*yybottom);
894 *yybottom = yybottom_new;
895 *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]),
896 [full], [[
897 YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix,
898 (unsigned long int) yyalloc, yydebug_suffix));]])[
899 }
900 return 0;
901 }
902
903 /* Establish the initial context for the current lookahead if no initial
904 context is currently established.
905
906 We define a context as a snapshot of the parser stacks. We define
907 the initial context for a lookahead as the context in which the
908 parser initially examines that lookahead in order to select a
909 syntactic action. Thus, if the lookahead eventually proves
910 syntactically unacceptable (possibly in a later context reached via a
911 series of reductions), the initial context can be used to determine
912 the exact set of tokens that would be syntactically acceptable in the
913 lookahead's place. Moreover, it is the context after which any
914 further semantic actions would be erroneous because they would be
915 determined by a syntactically unacceptable token.
916
917 YY_LAC_ESTABLISH should be invoked when a reduction is about to be
918 performed in an inconsistent state (which, for the purposes of LAC,
919 includes consistent states that don't know they're consistent because
920 their default reductions have been disabled). Iff there is a
921 lookahead token, it should also be invoked before reporting a syntax
922 error. This latter case is for the sake of the debugging output.
923
924 For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as
925 follows. If no initial context is currently established for the
926 current lookahead, then check if that lookahead can eventually be
927 shifted if syntactic actions continue from the current context.
928 Report a syntax error if it cannot. */
929 #define YY_LAC_ESTABLISH \
930 do { \
931 if (!yy_lac_established) \
932 { \
933 YYDPRINTF ((stderr, \
934 "LAC: initial context established for %s\n", \
935 yytname[yytoken])); \
936 yy_lac_established = 1; \
937 { \
938 int yy_lac_status = \
939 yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \
940 if (yy_lac_status == 2) \
941 goto yyexhaustedlab; \
942 if (yy_lac_status == 1) \
943 goto yyerrlab; \
944 } \
945 } \
946 } while (YYID (0))
947
948 /* Discard any previous initial lookahead context because of Event,
949 which may be a lookahead change or an invalidation of the currently
950 established initial context for the current lookahead.
951
952 The most common example of a lookahead change is a shift. An example
953 of both cases is syntax error recovery. That is, a syntax error
954 occurs when the lookahead is syntactically erroneous for the
955 currently established initial context, so error recovery manipulates
956 the parser stacks to try to find a new initial context in which the
957 current lookahead is syntactically acceptable. If it fails to find
958 such a context, it discards the lookahead. */
959 #if YYDEBUG
960 # define YY_LAC_DISCARD(Event) \
961 do { \
962 if (yy_lac_established) \
963 { \
964 if (yydebug) \
965 YYFPRINTF (stderr, "LAC: initial context discarded due to " \
966 Event "\n"); \
967 yy_lac_established = 0; \
968 } \
969 } while (YYID (0))
970 #else
971 # define YY_LAC_DISCARD(Event) yy_lac_established = 0
972 #endif
973
974 /* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can
975 eventually (after perhaps some reductions) be shifted, return 1 if
976 not, or return 2 if memory is exhausted. As preconditions and
977 postconditions: *YYES_CAPACITY is the allocated size of the array to
978 which *YYES points, and either *YYES = YYESA or *YYES points to an
979 array allocated with YYSTACK_ALLOC. yy_lac may overwrite the
980 contents of either array, alter *YYES and *YYES_CAPACITY, and free
981 any old *YYES other than YYESA. */
982 static int
983 yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
984 YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
985 {
986 yytype_int16 *yyes_prev = yyssp;
987 yytype_int16 *yyesp = yyes_prev;
988 YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken]));
989 if (yytoken == YYUNDEFTOK)
990 {
991 YYDPRINTF ((stderr, " Always Err\n"));
992 return 1;
993 }
994 while (1)
995 {
996 int yyrule = yypact[*yyesp];
997 if (yypact_value_is_default (yyrule)
998 || (yyrule += yytoken) < 0 || YYLAST < yyrule
999 || yycheck[yyrule] != yytoken)
1000 {
1001 yyrule = yydefact[*yyesp];
1002 if (yyrule == 0)
1003 {
1004 YYDPRINTF ((stderr, " Err\n"));
1005 return 1;
1006 }
1007 }
1008 else
1009 {
1010 yyrule = yytable[yyrule];
1011 if (yytable_value_is_error (yyrule))
1012 {
1013 YYDPRINTF ((stderr, " Err\n"));
1014 return 1;
1015 }
1016 if (0 < yyrule)
1017 {
1018 YYDPRINTF ((stderr, " S%d\n", yyrule));
1019 return 0;
1020 }
1021 yyrule = -yyrule;
1022 }
1023 {
1024 YYSIZE_T yylen = yyr2[yyrule];
1025 YYDPRINTF ((stderr, " R%d", yyrule - 1));
1026 if (yyesp != yyes_prev)
1027 {
1028 YYSIZE_T yysize = yyesp - *yyes + 1;
1029 if (yylen < yysize)
1030 {
1031 yyesp -= yylen;
1032 yylen = 0;
1033 }
1034 else
1035 {
1036 yylen -= yysize;
1037 yyesp = yyes_prev;
1038 }
1039 }
1040 if (yylen)
1041 yyesp = yyes_prev -= yylen;
1042 }
1043 {
1044 int yystate;
1045 {
1046 int yylhs = yyr1[yyrule] - YYNTOKENS;
1047 yystate = yypgoto[yylhs] + *yyesp;
1048 if (yystate < 0 || YYLAST < yystate
1049 || yycheck[yystate] != *yyesp)
1050 yystate = yydefgoto[yylhs];
1051 else
1052 yystate = yytable[yystate];
1053 }
1054 if (yyesp == yyes_prev)
1055 {
1056 yyesp = *yyes;
1057 *yyesp = yystate;
1058 }
1059 else
1060 {
1061 if (yy_lac_stack_realloc (yyes_capacity, 1,
1062 #if YYDEBUG
1063 " (", ")",
1064 #endif
1065 yyes, yyesa, &yyesp, yyes_prev))
1066 {
1067 YYDPRINTF ((stderr, "\n"));
1068 return 2;
1069 }
1070 *++yyesp = yystate;
1071 }
1072 YYDPRINTF ((stderr, " G%d", yystate));
1073 }
1074 }
1075 }]])[
1076
1077
1078 #if YYERROR_VERBOSE
1079
1080 # ifndef yystrlen
1081 # if defined __GLIBC__ && defined _STRING_H
1082 # define yystrlen strlen
1083 # else
1084 /* Return the length of YYSTR. */
1085 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
1086 [[const char *yystr], [yystr]])[
1087 {
1088 YYSIZE_T yylen;
1089 for (yylen = 0; yystr[yylen]; yylen++)
1090 continue;
1091 return yylen;
1092 }
1093 # endif
1094 # endif
1095
1096 # ifndef yystpcpy
1097 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
1098 # define yystpcpy stpcpy
1099 # else
1100 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
1101 YYDEST. */
1102 ]b4_c_function_def([yystpcpy], [static char *],
1103 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
1104 {
1105 char *yyd = yydest;
1106 const char *yys = yysrc;
1107
1108 while ((*yyd++ = *yys++) != '\0')
1109 continue;
1110
1111 return yyd - 1;
1112 }
1113 # endif
1114 # endif
1115
1116 # ifndef yytnamerr
1117 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
1118 quotes and backslashes, so that it's suitable for yyerror. The
1119 heuristic is that double-quoting is unnecessary unless the string
1120 contains an apostrophe, a comma, or backslash (other than
1121 backslash-backslash). YYSTR is taken from yytname. If YYRES is
1122 null, do not copy; instead, return the length of what the result
1123 would have been. */
1124 static YYSIZE_T
1125 yytnamerr (char *yyres, const char *yystr)
1126 {
1127 if (*yystr == '"')
1128 {
1129 YYSIZE_T yyn = 0;
1130 char const *yyp = yystr;
1131
1132 for (;;)
1133 switch (*++yyp)
1134 {
1135 case '\'':
1136 case ',':
1137 goto do_not_strip_quotes;
1138
1139 case '\\':
1140 if (*++yyp != '\\')
1141 goto do_not_strip_quotes;
1142 /* Fall through. */
1143 default:
1144 if (yyres)
1145 yyres[yyn] = *yyp;
1146 yyn++;
1147 break;
1148
1149 case '"':
1150 if (yyres)
1151 yyres[yyn] = '\0';
1152 return yyn;
1153 }
1154 do_not_strip_quotes: ;
1155 }
1156
1157 if (! yyres)
1158 return yystrlen (yystr);
1159
1160 return yystpcpy (yyres, yystr) - yyres;
1161 }
1162 # endif
1163
1164 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
1165 about the unexpected token YYTOKEN for the state stack whose top is
1166 YYSSP.]b4_lac_if([[ In order to see if a particular token T is a
1167 valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[
1168
1169 Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is
1170 not large enough to hold the message. In that case, also set
1171 *YYMSG_ALLOC to the required number of bytes. Return 2 if the
1172 required number of bytes is too large to store]b4_lac_if([[ or if
1173 yy_lac returned 2]])[. */
1174 static int
1175 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
1176 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
1177 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
1178 {
1179 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);
1180 YYSIZE_T yysize = yysize0;
1181 YYSIZE_T yysize1;
1182 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
1183 /* Internationalized format string. */
1184 const char *yyformat = 0;
1185 /* Arguments of yyformat. */
1186 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
1187 /* Number of reported tokens (one for the "unexpected", one per
1188 "expected"). */
1189 int yycount = 0;
1190
1191 /* There are many possibilities here to consider:
1192 - Assume YYFAIL is not used. It's too flawed to consider. See
1193 <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
1194 for details. YYERROR is fine as it does not invoke this
1195 function.
1196 - If this state is a consistent state with a default action, then
1197 the only way this function was invoked is if the default action
1198 is an error action. In that case, don't check for expected
1199 tokens because there are none.
1200 - The only way there can be no lookahead present (in yychar) is if
1201 this state is a consistent state with a default action. Thus,
1202 detecting the absence of a lookahead is sufficient to determine
1203 that there is no unexpected or expected token to report. In that
1204 case, just report a simple "syntax error".
1205 - Don't assume there isn't a lookahead just because this state is a
1206 consistent state with a default action. There might have been a
1207 previous inconsistent state, consistent state with a non-default
1208 action, or user semantic action that manipulated yychar.]b4_lac_if([[
1209 In the first two cases, it might appear that the current syntax
1210 error should have been detected in the previous state when yy_lac
1211 was invoked. However, at that time, there might have been a
1212 different syntax error that discarded a different initial context
1213 during error recovery, leaving behind the current lookahead.]], [[
1214 - Of course, the expected token list depends on states to have
1215 correct lookahead information, and it depends on the parser not
1216 to perform extra reductions after fetching a lookahead from the
1217 scanner and before detecting a syntax error. Thus, state merging
1218 (from LALR or IELR) and default reductions corrupt the expected
1219 token list. However, the list is correct for canonical LR with
1220 one exception: it will still contain any token that will not be
1221 accepted due to an error action in a later state.]])[
1222 */
1223 if (yytoken != YYEMPTY)
1224 {
1225 int yyn = yypact[*yyssp];]b4_lac_if([[
1226 YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[
1227 yyarg[yycount++] = yytname[yytoken];
1228 if (!yypact_value_is_default (yyn))
1229 {]b4_lac_if([], [[
1230 /* Start YYX at -YYN if negative to avoid negative indexes in
1231 YYCHECK. In other words, skip the first -YYN actions for
1232 this state because they are default actions. */
1233 int yyxbegin = yyn < 0 ? -yyn : 0;
1234 /* Stay within bounds of both yycheck and yytname. */
1235 int yychecklim = YYLAST - yyn + 1;
1236 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[
1237 int yyx;]b4_lac_if([[
1238
1239 for (yyx = 0; yyx < YYNTOKENS; ++yyx)
1240 if (yyx != YYTERROR && yyx != YYUNDEFTOK)
1241 {
1242 {
1243 int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity,
1244 yyssp, yyx);
1245 if (yy_lac_status == 2)
1246 return 2;
1247 if (yy_lac_status == 1)
1248 continue;
1249 }]], [[
1250
1251 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
1252 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
1253 && !yytable_value_is_error (yytable[yyx + yyn]))
1254 {]])[
1255 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
1256 {
1257 yycount = 1;
1258 yysize = yysize0;
1259 break;
1260 }
1261 yyarg[yycount++] = yytname[yyx];
1262 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
1263 if (! (yysize <= yysize1
1264 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1265 return 2;
1266 yysize = yysize1;
1267 }
1268 }]b4_lac_if([[
1269 # if YYDEBUG
1270 else if (yydebug)
1271 YYFPRINTF (stderr, "No expected tokens.\n");
1272 # endif]])[
1273 }
1274
1275 switch (yycount)
1276 {
1277 # define YYCASE_(N, S) \
1278 case N: \
1279 yyformat = S; \
1280 break
1281 YYCASE_(0, YY_("syntax error"));
1282 YYCASE_(1, YY_("syntax error, unexpected %s"));
1283 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
1284 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
1285 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
1286 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
1287 # undef YYCASE_
1288 }
1289
1290 yysize1 = yysize + yystrlen (yyformat);
1291 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1292 return 2;
1293 yysize = yysize1;
1294
1295 if (*yymsg_alloc < yysize)
1296 {
1297 *yymsg_alloc = 2 * yysize;
1298 if (! (yysize <= *yymsg_alloc
1299 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
1300 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
1301 return 1;
1302 }
1303
1304 /* Avoid sprintf, as that infringes on the user's name space.
1305 Don't have undefined behavior even if the translation
1306 produced a string with the wrong number of "%s"s. */
1307 {
1308 char *yyp = *yymsg;
1309 int yyi = 0;
1310 while ((*yyp = *yyformat) != '\0')
1311 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1312 {
1313 yyp += yytnamerr (yyp, yyarg[yyi++]);
1314 yyformat += 2;
1315 }
1316 else
1317 {
1318 yyp++;
1319 yyformat++;
1320 }
1321 }
1322 return 0;
1323 }
1324 #endif /* YYERROR_VERBOSE */
1325
1326 ]b4_yydestruct_generate([b4_c_function_def])b4_push_if([], [[
1327
1328
1329 /* Prevent warnings from -Wmissing-prototypes. */
1330 #ifdef YYPARSE_PARAM
1331 ]b4_c_function_decl([yyparse], [int],
1332 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1333 #else /* ! YYPARSE_PARAM */
1334 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1335 #endif /* ! YYPARSE_PARAM */]])b4_pure_if([], [
1336
1337 b4_declare_scanner_communication_variables])[]b4_push_if([[
1338
1339
1340 struct yypstate
1341 {]b4_declare_parser_state_variables[
1342 /* Used to determine if this is the first time this instance has
1343 been used. */
1344 int yynew;
1345 };]b4_pure_if([], [[
1346
1347 static char yypstate_allocated = 0;]])b4_pull_if([
1348
1349 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1350 {
1351 return yypull_parse (0]m4_ifset([b4_parse_param],
1352 [[, ]b4_c_args(b4_parse_param)])[);
1353 }
1354
1355 ]b4_c_function_def([[yypull_parse]], [[int]],
1356 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1357 b4_parse_param]))[
1358 {
1359 int yystatus;
1360 yypstate *yyps_local;]b4_pure_if([[
1361 int yychar;
1362 YYSTYPE yylval;]b4_locations_if([[
1363 YYLTYPE yylloc;]])])[
1364 if (yyps == 0)
1365 {
1366 yyps_local = yypstate_new ();
1367 if (!yyps_local)
1368 {]b4_pure_if([[
1369 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1370 if (!yypstate_allocated)
1371 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1372 return 2;
1373 }
1374 }
1375 else
1376 yyps_local = yyps;
1377 do {
1378 yychar = YYLEX;
1379 yystatus =
1380 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1381 } while (yystatus == YYPUSH_MORE);
1382 if (yyps == 0)
1383 yypstate_delete (yyps_local);
1384 return yystatus;
1385 }]])[
1386
1387 /* Initialize the parser data structure. */
1388 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1389 {
1390 yypstate *yyps;]b4_pure_if([], [[
1391 if (yypstate_allocated)
1392 return 0;]])[
1393 yyps = (yypstate *) malloc (sizeof *yyps);
1394 if (!yyps)
1395 return 0;
1396 yyps->yynew = 1;]b4_pure_if([], [[
1397 yypstate_allocated = 1;]])[
1398 return yyps;
1399 }
1400
1401 ]b4_c_function_def([[yypstate_delete]], [[void]],
1402 [[[yypstate *yyps]], [[yyps]]])[
1403 {
1404 #ifndef yyoverflow
1405 /* If the stack was reallocated but the parse did not complete, then the
1406 stack still needs to be freed. */
1407 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1408 YYSTACK_FREE (yyps->yyss);
1409 #endif]b4_lac_if([[
1410 if (!yyps->yynew && yyps->yyes != yyps->yyesa)
1411 YYSTACK_FREE (yyps->yyes);]])[
1412 free (yyps);]b4_pure_if([], [[
1413 yypstate_allocated = 0;]])[
1414 }
1415 ]b4_pure_if([[
1416 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1417 #define yystate yyps->yystate
1418 #define yyerrstatus yyps->yyerrstatus
1419 #define yyssa yyps->yyssa
1420 #define yyss yyps->yyss
1421 #define yyssp yyps->yyssp
1422 #define yyvsa yyps->yyvsa
1423 #define yyvs yyps->yyvs
1424 #define yyvsp yyps->yyvsp]b4_locations_if([[
1425 #define yylsa yyps->yylsa
1426 #define yyls yyps->yyls
1427 #define yylsp yyps->yylsp
1428 #define yyerror_range yyps->yyerror_range]])[
1429 #define yystacksize yyps->yystacksize]b4_lac_if([[
1430 #define yyesa yyps->yyesa
1431 #define yyes yyps->yyes
1432 #define yyes_capacity yyps->yyes_capacity]])[
1433
1434
1435 /*---------------.
1436 | yypush_parse. |
1437 `---------------*/
1438
1439 ]b4_c_function_def([[yypush_parse]], [[int]],
1440 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1441 [[[int yypushed_char]], [[yypushed_char]]],
1442 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1443 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1444 b4_parse_param]))], [[
1445
1446
1447 /*----------.
1448 | yyparse. |
1449 `----------*/
1450
1451 #ifdef YYPARSE_PARAM
1452 ]b4_c_function_def([yyparse], [int],
1453 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1454 #else /* ! YYPARSE_PARAM */
1455 ]b4_c_function_def([yyparse], [int], b4_parse_param)[
1456 #endif]])[
1457 {]b4_pure_if([b4_declare_scanner_communication_variables
1458 ])b4_push_if([b4_pure_if([], [[
1459 int yypushed_char = yychar;
1460 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1461 YYLTYPE yypushed_loc = yylloc;]])
1462 ])],
1463 [b4_declare_parser_state_variables
1464 ])b4_lac_if([[
1465 int yy_lac_established = 0;]])[
1466 int yyn;
1467 int yyresult;
1468 /* Lookahead token as an internal (translated) token number. */
1469 int yytoken;
1470 /* The variables used to return semantic value and location from the
1471 action routines. */
1472 YYSTYPE yyval;]b4_locations_if([[
1473 YYLTYPE yyloc;]])[
1474
1475 #if YYERROR_VERBOSE
1476 /* Buffer for error messages, and its allocated size. */
1477 char yymsgbuf[128];
1478 char *yymsg = yymsgbuf;
1479 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1480 #endif
1481
1482 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1483
1484 /* The number of symbols on the RHS of the reduced rule.
1485 Keep to zero when no symbol should be popped. */
1486 int yylen = 0;]b4_push_if([[
1487
1488 if (!yyps->yynew)
1489 {
1490 yyn = yypact[yystate];
1491 goto yyread_pushed_token;
1492 }]])[
1493
1494 yytoken = 0;
1495 yyss = yyssa;
1496 yyvs = yyvsa;]b4_locations_if([[
1497 yyls = yylsa;]])[
1498 yystacksize = YYINITDEPTH;]b4_lac_if([[
1499
1500 yyes = yyesa;
1501 yyes_capacity = sizeof yyesa / sizeof *yyes;
1502 if (YYMAXDEPTH < yyes_capacity)
1503 yyes_capacity = YYMAXDEPTH;]])[
1504
1505 YYDPRINTF ((stderr, "Starting parse\n"));
1506
1507 yystate = 0;
1508 yyerrstatus = 0;
1509 yynerrs = 0;
1510 yychar = YYEMPTY; /* Cause a token to be read. */
1511
1512 /* Initialize stack pointers.
1513 Waste one element of value and location stack
1514 so that they stay on the same level as the state stack.
1515 The wasted elements are never initialized. */
1516 yyssp = yyss;
1517 yyvsp = yyvs;]b4_locations_if([[
1518 yylsp = yyls;
1519
1520 #if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
1521 /* Initialize the default location before parsing starts. */
1522 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1523 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1524 #endif]])
1525 m4_ifdef([b4_initial_action],[
1526 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1527 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1528 /* User initialization code. */
1529 b4_user_initial_action
1530 m4_popdef([b4_dollar_dollar])dnl
1531 m4_popdef([b4_at_dollar])])dnl
1532 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1533 ]])dnl
1534 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1535 ]])[
1536 goto yysetstate;
1537
1538 /*------------------------------------------------------------.
1539 | yynewstate -- Push a new state, which is found in yystate. |
1540 `------------------------------------------------------------*/
1541 yynewstate:
1542 /* In all cases, when you get here, the value and location stacks
1543 have just been pushed. So pushing a state here evens the stacks. */
1544 yyssp++;
1545
1546 yysetstate:
1547 *yyssp = yystate;
1548
1549 if (yyss + yystacksize - 1 <= yyssp)
1550 {
1551 /* Get the current used size of the three stacks, in elements. */
1552 YYSIZE_T yysize = yyssp - yyss + 1;
1553
1554 #ifdef yyoverflow
1555 {
1556 /* Give user a chance to reallocate the stack. Use copies of
1557 these so that the &'s don't force the real ones into
1558 memory. */
1559 YYSTYPE *yyvs1 = yyvs;
1560 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1561 YYLTYPE *yyls1 = yyls;])[
1562
1563 /* Each stack pointer address is followed by the size of the
1564 data in use in that stack, in bytes. This used to be a
1565 conditional around just the two extra args, but that might
1566 be undefined if yyoverflow is a macro. */
1567 yyoverflow (YY_("memory exhausted"),
1568 &yyss1, yysize * sizeof (*yyssp),
1569 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1570 &yyls1, yysize * sizeof (*yylsp),])[
1571 &yystacksize);
1572 ]b4_locations_if([
1573 yyls = yyls1;])[
1574 yyss = yyss1;
1575 yyvs = yyvs1;
1576 }
1577 #else /* no yyoverflow */
1578 # ifndef YYSTACK_RELOCATE
1579 goto yyexhaustedlab;
1580 # else
1581 /* Extend the stack our own way. */
1582 if (YYMAXDEPTH <= yystacksize)
1583 goto yyexhaustedlab;
1584 yystacksize *= 2;
1585 if (YYMAXDEPTH < yystacksize)
1586 yystacksize = YYMAXDEPTH;
1587
1588 {
1589 yytype_int16 *yyss1 = yyss;
1590 union yyalloc *yyptr =
1591 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1592 if (! yyptr)
1593 goto yyexhaustedlab;
1594 YYSTACK_RELOCATE (yyss_alloc, yyss);
1595 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1596 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1597 # undef YYSTACK_RELOCATE
1598 if (yyss1 != yyssa)
1599 YYSTACK_FREE (yyss1);
1600 }
1601 # endif
1602 #endif /* no yyoverflow */
1603
1604 yyssp = yyss + yysize - 1;
1605 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1606 yylsp = yyls + yysize - 1;])[
1607
1608 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1609 (unsigned long int) yystacksize));
1610
1611 if (yyss + yystacksize - 1 <= yyssp)
1612 YYABORT;
1613 }
1614
1615 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1616
1617 if (yystate == YYFINAL)
1618 YYACCEPT;
1619
1620 goto yybackup;
1621
1622 /*-----------.
1623 | yybackup. |
1624 `-----------*/
1625 yybackup:
1626
1627 /* Do appropriate processing given the current state. Read a
1628 lookahead token if we need one and don't already have one. */
1629
1630 /* First try to decide what to do without reference to lookahead token. */
1631 yyn = yypact[yystate];
1632 if (yypact_value_is_default (yyn))
1633 goto yydefault;
1634
1635 /* Not known => get a lookahead token if don't already have one. */
1636
1637 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1638 if (yychar == YYEMPTY)
1639 {]b4_push_if([[
1640 if (!yyps->yynew)
1641 {]b4_use_push_for_pull_if([], [[
1642 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1643 yyresult = YYPUSH_MORE;
1644 goto yypushreturn;
1645 }
1646 yyps->yynew = 0;]b4_pure_if([], [[
1647 /* Restoring the pushed token is only necessary for the first
1648 yypush_parse invocation since subsequent invocations don't overwrite
1649 it before jumping to yyread_pushed_token. */
1650 yychar = yypushed_char;
1651 yylval = yypushed_val;]b4_locations_if([[
1652 yylloc = yypushed_loc;]])])[
1653 yyread_pushed_token:]])[
1654 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1655 yychar = yypushed_char;
1656 if (yypushed_val)
1657 yylval = *yypushed_val;]b4_locations_if([[
1658 if (yypushed_loc)
1659 yylloc = *yypushed_loc;]])])], [[
1660 yychar = YYLEX;]])[
1661 }
1662
1663 if (yychar <= YYEOF)
1664 {
1665 yychar = yytoken = YYEOF;
1666 YYDPRINTF ((stderr, "Now at end of input.\n"));
1667 }
1668 else
1669 {
1670 yytoken = YYTRANSLATE (yychar);
1671 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1672 }
1673
1674 /* If the proper action on seeing token YYTOKEN is to reduce or to
1675 detect an error, take that action. */
1676 yyn += yytoken;
1677 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[
1678 {
1679 YY_LAC_ESTABLISH;
1680 goto yydefault;
1681 }]], [[
1682 goto yydefault;]])[
1683 yyn = yytable[yyn];
1684 if (yyn <= 0)
1685 {
1686 if (yytable_value_is_error (yyn))
1687 goto yyerrlab;]b4_lac_if([[
1688 YY_LAC_ESTABLISH;]])[
1689 yyn = -yyn;
1690 goto yyreduce;
1691 }
1692
1693 /* Count tokens shifted since error; after three, turn off error
1694 status. */
1695 if (yyerrstatus)
1696 yyerrstatus--;
1697
1698 /* Shift the lookahead token. */
1699 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1700
1701 /* Discard the shifted token. */
1702 yychar = YYEMPTY;]b4_lac_if([[
1703 YY_LAC_DISCARD ("shift");]])[
1704
1705 yystate = yyn;
1706 *++yyvsp = yylval;
1707 ]b4_locations_if([ *++yylsp = yylloc;])[
1708 goto yynewstate;
1709
1710
1711 /*-----------------------------------------------------------.
1712 | yydefault -- do the default action for the current state. |
1713 `-----------------------------------------------------------*/
1714 yydefault:
1715 yyn = yydefact[yystate];
1716 if (yyn == 0)
1717 goto yyerrlab;
1718 goto yyreduce;
1719
1720
1721 /*-----------------------------.
1722 | yyreduce -- Do a reduction. |
1723 `-----------------------------*/
1724 yyreduce:
1725 /* yyn is the number of a rule to reduce with. */
1726 yylen = yyr2[yyn];
1727
1728 /* If YYLEN is nonzero, implement the default value of the action:
1729 `$$ = $1'.
1730
1731 Otherwise, the following line sets YYVAL to garbage.
1732 This behavior is undocumented and Bison
1733 users should not rely upon it. Assigning to YYVAL
1734 unconditionally makes the parser a bit smaller, and it avoids a
1735 GCC warning that YYVAL may be used uninitialized. */
1736 yyval = yyvsp[1-yylen];
1737
1738 ]b4_locations_if(
1739 [[ /* Default location. */
1740 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1741 YY_REDUCE_PRINT (yyn);]b4_lac_if([[
1742 {
1743 int yychar_backup = yychar;
1744 switch (yyn)
1745 {
1746 ]b4_user_actions[
1747 default: break;
1748 }
1749 if (yychar_backup != yychar)
1750 YY_LAC_DISCARD ("yychar change");
1751 }]], [[
1752 switch (yyn)
1753 {
1754 ]b4_user_actions[
1755 default: break;
1756 }]])[
1757 /* User semantic actions sometimes alter yychar, and that requires
1758 that yytoken be updated with the new translation. We take the
1759 approach of translating immediately before every use of yytoken.
1760 One alternative is translating here after every semantic action,
1761 but that translation would be missed if the semantic action invokes
1762 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1763 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
1764 incorrect destructor might then be invoked immediately. In the
1765 case of YYERROR or YYBACKUP, subsequent parser actions might lead
1766 to an incorrect destructor call or verbose syntax error message
1767 before the lookahead is translated. */
1768 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1769
1770 YYPOPSTACK (yylen);
1771 yylen = 0;
1772 YY_STACK_PRINT (yyss, yyssp);
1773
1774 *++yyvsp = yyval;]b4_locations_if([
1775 *++yylsp = yyloc;])[
1776
1777 /* Now `shift' the result of the reduction. Determine what state
1778 that goes to, based on the state we popped back to and the rule
1779 number reduced by. */
1780
1781 yyn = yyr1[yyn];
1782
1783 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1784 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1785 yystate = yytable[yystate];
1786 else
1787 yystate = yydefgoto[yyn - YYNTOKENS];
1788
1789 goto yynewstate;
1790
1791
1792 /*------------------------------------.
1793 | yyerrlab -- here on detecting error |
1794 `------------------------------------*/
1795 yyerrlab:
1796 /* Make sure we have latest lookahead translation. See comments at
1797 user semantic actions for why this is necessary. */
1798 yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
1799
1800 /* If not already recovering from an error, report this error. */
1801 if (!yyerrstatus)
1802 {
1803 ++yynerrs;
1804 #if ! YYERROR_VERBOSE
1805 yyerror (]b4_yyerror_args[YY_("syntax error"));
1806 #else
1807 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[
1808 yyesa, &yyes, &yyes_capacity, \]])[
1809 yyssp, yytoken)
1810 {
1811 char const *yymsgp = YY_("syntax error");
1812 int yysyntax_error_status;]b4_lac_if([[
1813 if (yychar != YYEMPTY)
1814 YY_LAC_ESTABLISH;]])[
1815 yysyntax_error_status = YYSYNTAX_ERROR;
1816 if (yysyntax_error_status == 0)
1817 yymsgp = yymsg;
1818 else if (yysyntax_error_status == 1)
1819 {
1820 if (yymsg != yymsgbuf)
1821 YYSTACK_FREE (yymsg);
1822 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1823 if (!yymsg)
1824 {
1825 yymsg = yymsgbuf;
1826 yymsg_alloc = sizeof yymsgbuf;
1827 yysyntax_error_status = 2;
1828 }
1829 else
1830 {
1831 yysyntax_error_status = YYSYNTAX_ERROR;
1832 yymsgp = yymsg;
1833 }
1834 }
1835 yyerror (]b4_yyerror_args[yymsgp);
1836 if (yysyntax_error_status == 2)
1837 goto yyexhaustedlab;
1838 }
1839 # undef YYSYNTAX_ERROR
1840 #endif
1841 }
1842
1843 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
1844
1845 if (yyerrstatus == 3)
1846 {
1847 /* If just tried and failed to reuse lookahead token after an
1848 error, discard it. */
1849
1850 if (yychar <= YYEOF)
1851 {
1852 /* Return failure if at end of input. */
1853 if (yychar == YYEOF)
1854 YYABORT;
1855 }
1856 else
1857 {
1858 yydestruct ("Error: discarding",
1859 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1860 yychar = YYEMPTY;
1861 }
1862 }
1863
1864 /* Else will try to reuse lookahead token after shifting the error
1865 token. */
1866 goto yyerrlab1;
1867
1868
1869 /*---------------------------------------------------.
1870 | yyerrorlab -- error raised explicitly by YYERROR. |
1871 `---------------------------------------------------*/
1872 yyerrorlab:
1873
1874 /* Pacify compilers like GCC when the user code never invokes
1875 YYERROR and the label yyerrorlab therefore never appears in user
1876 code. */
1877 if (/*CONSTCOND*/ 0)
1878 goto yyerrorlab;
1879
1880 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
1881 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1882 this YYERROR. */
1883 YYPOPSTACK (yylen);
1884 yylen = 0;
1885 YY_STACK_PRINT (yyss, yyssp);
1886 yystate = *yyssp;
1887 goto yyerrlab1;
1888
1889
1890 /*-------------------------------------------------------------.
1891 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1892 `-------------------------------------------------------------*/
1893 yyerrlab1:
1894 yyerrstatus = 3; /* Each real token shifted decrements this. */
1895
1896 for (;;)
1897 {
1898 yyn = yypact[yystate];
1899 if (!yypact_value_is_default (yyn))
1900 {
1901 yyn += YYTERROR;
1902 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1903 {
1904 yyn = yytable[yyn];
1905 if (0 < yyn)
1906 break;
1907 }
1908 }
1909
1910 /* Pop the current state because it cannot handle the error token. */
1911 if (yyssp == yyss)
1912 YYABORT;
1913
1914 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
1915 yydestruct ("Error: popping",
1916 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1917 YYPOPSTACK (1);
1918 yystate = *yyssp;
1919 YY_STACK_PRINT (yyss, yyssp);
1920 }]b4_lac_if([[
1921
1922 /* If the stack popping above didn't lose the initial context for the
1923 current lookahead token, the shift below will for sure. */
1924 YY_LAC_DISCARD ("error recovery");]])[
1925
1926 *++yyvsp = yylval;
1927 ]b4_locations_if([[
1928 yyerror_range[2] = yylloc;
1929 /* Using YYLLOC is tempting, but would change the location of
1930 the lookahead. YYLOC is available though. */
1931 YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1932 *++yylsp = yyloc;]])[
1933
1934 /* Shift the error token. */
1935 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1936
1937 yystate = yyn;
1938 goto yynewstate;
1939
1940
1941 /*-------------------------------------.
1942 | yyacceptlab -- YYACCEPT comes here. |
1943 `-------------------------------------*/
1944 yyacceptlab:
1945 yyresult = 0;
1946 goto yyreturn;
1947
1948 /*-----------------------------------.
1949 | yyabortlab -- YYABORT comes here. |
1950 `-----------------------------------*/
1951 yyabortlab:
1952 yyresult = 1;
1953 goto yyreturn;
1954
1955 #if ]b4_lac_if([[1]], [[!defined(yyoverflow) || YYERROR_VERBOSE]])[
1956 /*-------------------------------------------------.
1957 | yyexhaustedlab -- memory exhaustion comes here. |
1958 `-------------------------------------------------*/
1959 yyexhaustedlab:
1960 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1961 yyresult = 2;
1962 /* Fall through. */
1963 #endif
1964
1965 yyreturn:
1966 if (yychar != YYEMPTY)
1967 {
1968 /* Make sure we have latest lookahead translation. See comments at
1969 user semantic actions for why this is necessary. */
1970 yytoken = YYTRANSLATE (yychar);
1971 yydestruct ("Cleanup: discarding lookahead",
1972 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1973 }
1974 /* Do not reclaim the symbols of the rule which action triggered
1975 this YYABORT or YYACCEPT. */
1976 YYPOPSTACK (yylen);
1977 YY_STACK_PRINT (yyss, yyssp);
1978 while (yyssp != yyss)
1979 {
1980 yydestruct ("Cleanup: popping",
1981 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1982 YYPOPSTACK (1);
1983 }
1984 #ifndef yyoverflow
1985 if (yyss != yyssa)
1986 YYSTACK_FREE (yyss);
1987 #endif]b4_lac_if([[
1988 if (yyes != yyesa)
1989 YYSTACK_FREE (yyes);]])b4_push_if([[
1990 yyps->yynew = 1;
1991
1992 yypushreturn:]])[
1993 #if YYERROR_VERBOSE
1994 if (yymsg != yymsgbuf)
1995 YYSTACK_FREE (yymsg);
1996 #endif
1997 /* Make sure YYID is used. */
1998 return YYID (yyresult);
1999 }
2000
2001 ]b4_epilogue[]dnl
2002 b4_defines_if(
2003 [@output(b4_spec_defines_file@)@
2004 b4_copyright([Bison interface for Yacc-like parsers in C])dnl
2005
2006 b4_percent_code_get([[requires]])[]dnl
2007
2008 b4_token_enums_defines(b4_tokens)
2009
2010 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
2011 ]m4_ifdef([b4_stype],
2012 [[typedef union ]b4_union_name[
2013 {
2014 ]b4_user_stype[
2015 } YYSTYPE;
2016 # define YYSTYPE_IS_TRIVIAL 1]],
2017 [m4_if(b4_tag_seen_flag, 0,
2018 [[typedef int YYSTYPE;
2019 # define YYSTYPE_IS_TRIVIAL 1]])])[
2020 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
2021 # define YYSTYPE_IS_DECLARED 1
2022 #endif
2023
2024 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
2025
2026 b4_locations_if(
2027 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
2028 typedef struct YYLTYPE
2029 {
2030 int first_line;
2031 int first_column;
2032 int last_line;
2033 int last_column;
2034 } YYLTYPE;
2035 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
2036 # define YYLTYPE_IS_DECLARED 1
2037 # define YYLTYPE_IS_TRIVIAL 1
2038 #endif
2039
2040 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
2041 )dnl b4_locations_if
2042 b4_push_if([[
2043 #ifndef YYPUSH_DECLS
2044 # define YYPUSH_DECLS
2045 struct ]b4_prefix[pstate;
2046 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
2047 enum { YYPUSH_MORE = 4 };
2048 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
2049 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
2050 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
2051 [[[int yypushed_char]], [[yypushed_char]]],
2052 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
2053 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
2054 b4_parse_param]))
2055 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
2056 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
2057 b4_parse_param]))])
2058 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
2059 [[[void]], []])
2060 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
2061 [[b4_prefix[pstate *yyps]], [[yyps]]])[
2062 #endif
2063 ]])
2064 b4_percent_code_get([[provides]])[]dnl
2065 ])dnl b4_defines_if
2066 m4_divert_pop(0)
2067 m4_popdef([b4_copyright_years])
bison