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1 -*- C -*-
2 # Yacc compatible skeleton for Bison
3
4 # Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005,
5 # 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6
7 m4_pushdef([b4_copyright_years],
8 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010])
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, don't let BISON_USE_PUSH_FOR_PULL modify Bison's
35 # behavior 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 m4_include(b4_pkgdatadir/[c.m4])
42
43 ## ---------------- ##
44 ## Default values. ##
45 ## ---------------- ##
46
47 # Stack parameters.
48 m4_define_default([b4_stack_depth_max], [10000])
49 m4_define_default([b4_stack_depth_init], [200])
50
51
52 ## ------------------------ ##
53 ## Pure/impure interfaces. ##
54 ## ------------------------ ##
55
56 b4_percent_define_default([[api.pure]], [[false]])
57 b4_define_flag_if([pure])
58 m4_define([b4_pure_flag],
59 [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])
60
61 # b4_yacc_pure_if(IF-TRUE, IF-FALSE)
62 # ----------------------------------
63 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
64 m4_define([b4_yacc_pure_if],
65 [b4_pure_if([m4_ifset([b4_parse_param],
66 [$1], [$2])],
67 [$2])])
68
69
70 # b4_yyerror_args
71 # ---------------
72 # Arguments passed to yyerror: user args plus yylloc.
73 m4_define([b4_yyerror_args],
74 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
75 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
76
77
78 # b4_lex_param
79 # ------------
80 # Accumulate in b4_lex_param all the yylex arguments.
81 # b4_lex_param arrives quoted twice, but we want to keep only one level.
82 m4_define([b4_lex_param],
83 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
84 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
85 m4_ifdef([b4_lex_param], b4_lex_param)))
86
87
88 ## ------------ ##
89 ## Data Types. ##
90 ## ------------ ##
91
92 # b4_int_type(MIN, MAX)
93 # ---------------------
94 # Return the smallest int type able to handle numbers ranging from
95 # MIN to MAX (included). Overwrite the version from c.m4, which
96 # uses only C89 types, so that the user can override the shorter
97 # types, and so that pre-C89 compilers are handled correctly.
98 m4_define([b4_int_type],
99 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
100 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
101
102 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
103 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
104
105 m4_eval([0 <= $1]), [1], [unsigned int],
106
107 [int])])
108
109
110 ## ----------------- ##
111 ## Semantic Values. ##
112 ## ----------------- ##
113
114
115 # b4_lhs_value([TYPE])
116 # --------------------
117 # Expansion of $<TYPE>$.
118 m4_define([b4_lhs_value],
119 [b4_symbol_value(yyval, [$1])])
120
121
122 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
123 # --------------------------------------
124 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
125 # symbols on RHS.
126 m4_define([b4_rhs_value],
127 [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
128
129
130
131 ## ----------- ##
132 ## Locations. ##
133 ## ----------- ##
134
135 # b4_lhs_location()
136 # -----------------
137 # Expansion of @$.
138 m4_define([b4_lhs_location],
139 [(yyloc)])
140
141
142 # b4_rhs_location(RULE-LENGTH, NUM)
143 # ---------------------------------
144 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
145 # on RHS.
146 m4_define([b4_rhs_location],
147 [(yylsp@{b4_subtract([$2], [$1])@})])
148
149
150 ## ------------------ ##
151 ## Parser variables. ##
152 ## ------------------ ##
153
154 # b4_declare_scanner_communication_variables
155 # ------------------------------------------
156 # Declare the variables that are global, or local to YYPARSE if
157 # pure-parser.
158 m4_define([b4_declare_scanner_communication_variables], [[
159 /* The lookahead symbol. */
160 int yychar;
161
162 /* The semantic value of the lookahead symbol. */
163 YYSTYPE yylval;]b4_locations_if([[
164
165 /* Location data for the lookahead symbol. */
166 YYLTYPE yylloc;]])b4_pure_if([], [[
167
168 /* Number of syntax errors so far. */
169 int yynerrs;]])])
170
171
172 # b4_declare_parser_state_variables
173 # ---------------------------------
174 # Declare all the variables that are needed to maintain the parser state
175 # between calls to yypush_parse.
176 m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
177 /* Number of syntax errors so far. */
178 int yynerrs;
179 ]])[
180 int yystate;
181 /* Number of tokens to shift before error messages enabled. */
182 int yyerrstatus;
183
184 /* The stacks and their tools:
185 `yyss': related to states.
186 `yyvs': related to semantic values.]b4_locations_if([[
187 `yyls': related to locations.]])[
188
189 Refer to the stacks thru separate pointers, to allow yyoverflow
190 to reallocate them elsewhere. */
191
192 /* The state stack. */
193 yytype_int16 yyssa[YYINITDEPTH];
194 yytype_int16 *yyss;
195 yytype_int16 *yyssp;
196
197 /* The semantic value stack. */
198 YYSTYPE yyvsa[YYINITDEPTH];
199 YYSTYPE *yyvs;
200 YYSTYPE *yyvsp;]b4_locations_if([[
201
202 /* The location stack. */
203 YYLTYPE yylsa[YYINITDEPTH];
204 YYLTYPE *yyls;
205 YYLTYPE *yylsp;
206
207 /* The locations where the error started and ended. */
208 YYLTYPE yyerror_range[3];]])[
209
210 YYSIZE_T yystacksize;]])
211
212
213 ## --------------------------------------------------------- ##
214 ## Defining symbol actions, e.g., printers and destructors. ##
215 ## --------------------------------------------------------- ##
216
217 # We do want M4 expansion after # for CPP macros.
218 m4_changecom()
219 m4_divert_push(0)dnl
220 @output(b4_parser_file_name@)@
221 b4_copyright([Implementation for Bison's Yacc-like parsers in C])[
222
223 /* C LALR(1) parser skeleton written by Richard Stallman, by
224 simplifying the original so-called "semantic" parser. */
225
226 /* All symbols defined below should begin with yy or YY, to avoid
227 infringing on user name space. This should be done even for local
228 variables, as they might otherwise be expanded by user macros.
229 There are some unavoidable exceptions within include files to
230 define necessary library symbols; they are noted "INFRINGES ON
231 USER NAME SPACE" below. */
232
233 ]b4_identification
234 b4_percent_code_get([[top]])[]dnl
235 m4_if(b4_prefix, [yy], [],
236 [[/* Substitute the variable and function names. */]b4_pull_if([[
237 #define yyparse ]b4_prefix[parse]])b4_push_if([[
238 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
239 #define yypull_parse ]b4_prefix[pull_parse]])[
240 #define yypstate_new ]b4_prefix[pstate_new
241 #define yypstate_delete ]b4_prefix[pstate_delete
242 #define yypstate ]b4_prefix[pstate]])[
243 #define yylex ]b4_prefix[lex
244 #define yyerror ]b4_prefix[error
245 #define yylval ]b4_prefix[lval
246 #define yychar ]b4_prefix[char
247 #define yydebug ]b4_prefix[debug
248 #define yynerrs ]b4_prefix[nerrs
249 ]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
250
251 /* Copy the first part of user declarations. */
252 ]b4_user_pre_prologue[
253
254 /* Enabling traces. */
255 #ifndef YYDEBUG
256 # define YYDEBUG ]b4_parse_trace_if([1], [0])[
257 #endif
258
259 /* Enabling verbose error messages. */
260 #ifdef YYERROR_VERBOSE
261 # undef YYERROR_VERBOSE
262 # define YYERROR_VERBOSE 1
263 #else
264 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
265 #endif
266
267 /* Enabling the token table. */
268 #ifndef YYTOKEN_TABLE
269 # define YYTOKEN_TABLE ]b4_token_table[
270 #endif
271
272 ]b4_percent_code_get([[requires]])[]dnl
273
274 b4_token_enums_defines(b4_tokens)[
275
276 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
277 ]m4_ifdef([b4_stype],
278 [[typedef union ]b4_union_name[
279 {
280 ]b4_user_stype[
281 } YYSTYPE;
282 # define YYSTYPE_IS_TRIVIAL 1]],
283 [m4_if(b4_tag_seen_flag, 0,
284 [[typedef int YYSTYPE;
285 # define YYSTYPE_IS_TRIVIAL 1]])])[
286 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
287 # define YYSTYPE_IS_DECLARED 1
288 #endif]b4_locations_if([[
289
290 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
291 typedef struct YYLTYPE
292 {
293 int first_line;
294 int first_column;
295 int last_line;
296 int last_column;
297 } YYLTYPE;
298 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
299 # define YYLTYPE_IS_DECLARED 1
300 # define YYLTYPE_IS_TRIVIAL 1
301 #endif]])b4_push_if([[
302
303 #ifndef YYPUSH_DECLS
304 # define YYPUSH_DECLS
305 struct yypstate;
306 typedef struct yypstate yypstate;
307 enum { YYPUSH_MORE = 4 };
308
309 ]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
310 ])b4_c_function_decl([[yypush_parse]], [[int]],
311 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
312 [[[int yypushed_char]], [[yypushed_char]]],
313 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
314 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
315 b4_parse_param]))
316 b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
317 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
318 b4_parse_param]))])
319 b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
320 b4_c_function_decl([[yypstate_delete]], [[void]],
321 [[[yypstate *yyps]], [[yyps]]])[
322 #endif]])
323
324 b4_percent_code_get([[provides]])[]dnl
325
326 [/* Copy the second part of user declarations. */
327 ]b4_user_post_prologue
328 b4_percent_code_get[]dnl
329
330 [#ifdef short
331 # undef short
332 #endif
333
334 #ifdef YYTYPE_UINT8
335 typedef YYTYPE_UINT8 yytype_uint8;
336 #else
337 typedef unsigned char yytype_uint8;
338 #endif
339
340 #ifdef YYTYPE_INT8
341 typedef YYTYPE_INT8 yytype_int8;
342 #elif ]b4_c_modern[
343 typedef signed char yytype_int8;
344 #else
345 typedef short int yytype_int8;
346 #endif
347
348 #ifdef YYTYPE_UINT16
349 typedef YYTYPE_UINT16 yytype_uint16;
350 #else
351 typedef unsigned short int yytype_uint16;
352 #endif
353
354 #ifdef YYTYPE_INT16
355 typedef YYTYPE_INT16 yytype_int16;
356 #else
357 typedef short int yytype_int16;
358 #endif
359
360 #ifndef YYSIZE_T
361 # ifdef __SIZE_TYPE__
362 # define YYSIZE_T __SIZE_TYPE__
363 # elif defined size_t
364 # define YYSIZE_T size_t
365 # elif ! defined YYSIZE_T && ]b4_c_modern[
366 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
367 # define YYSIZE_T size_t
368 # else
369 # define YYSIZE_T unsigned int
370 # endif
371 #endif
372
373 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
374
375 #ifndef YY_
376 # if defined YYENABLE_NLS && YYENABLE_NLS
377 # if ENABLE_NLS
378 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
379 # define YY_(msgid) dgettext ("bison-runtime", msgid)
380 # endif
381 # endif
382 # ifndef YY_
383 # define YY_(msgid) msgid
384 # endif
385 #endif
386
387 /* Suppress unused-variable warnings by "using" E. */
388 #if ! defined lint || defined __GNUC__
389 # define YYUSE(e) ((void) (e))
390 #else
391 # define YYUSE(e) /* empty */
392 #endif
393
394 /* Identity function, used to suppress warnings about constant conditions. */
395 #ifndef lint
396 # define YYID(n) (n)
397 #else
398 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
399 {
400 return yyi;
401 }
402 #endif
403
404 #if ! defined yyoverflow || YYERROR_VERBOSE
405
406 ]b4_push_if([],
407 [[/* The parser invokes alloca or malloc; define the necessary symbols. */
408
409 # ifdef YYSTACK_USE_ALLOCA
410 # if YYSTACK_USE_ALLOCA
411 # ifdef __GNUC__
412 # define YYSTACK_ALLOC __builtin_alloca
413 # elif defined __BUILTIN_VA_ARG_INCR
414 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
415 # elif defined _AIX
416 # define YYSTACK_ALLOC __alloca
417 # elif defined _MSC_VER
418 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
419 # define alloca _alloca
420 # else
421 # define YYSTACK_ALLOC alloca
422 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && ]b4_c_modern[
423 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
424 # ifndef EXIT_SUCCESS
425 # define EXIT_SUCCESS 0
426 # endif
427 # endif
428 # endif
429 # endif
430 # endif
431
432 ]])dnl
433 [# ifdef YYSTACK_ALLOC
434 /* Pacify GCC's `empty if-body' warning. */
435 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
436 # ifndef YYSTACK_ALLOC_MAXIMUM
437 /* The OS might guarantee only one guard page at the bottom of the stack,
438 and a page size can be as small as 4096 bytes. So we cannot safely
439 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
440 to allow for a few compiler-allocated temporary stack slots. */
441 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
442 # endif
443 # else
444 # define YYSTACK_ALLOC YYMALLOC
445 # define YYSTACK_FREE YYFREE
446 # ifndef YYSTACK_ALLOC_MAXIMUM
447 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
448 # endif
449 # if (defined __cplusplus && ! defined EXIT_SUCCESS \
450 && ! ((defined YYMALLOC || defined malloc) \
451 && (defined YYFREE || defined free)))
452 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
453 # ifndef EXIT_SUCCESS
454 # define EXIT_SUCCESS 0
455 # endif
456 # endif
457 # ifndef YYMALLOC
458 # define YYMALLOC malloc
459 # if ! defined malloc && ! defined EXIT_SUCCESS && ]b4_c_modern[
460 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
461 # endif
462 # endif
463 # ifndef YYFREE
464 # define YYFREE free
465 # if ! defined free && ! defined EXIT_SUCCESS && ]b4_c_modern[
466 void free (void *); /* INFRINGES ON USER NAME SPACE */
467 # endif
468 # endif
469 # endif
470 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
471
472
473 #if (! defined yyoverflow \
474 && (! defined __cplusplus \
475 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
476 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
477
478 /* A type that is properly aligned for any stack member. */
479 union yyalloc
480 {
481 yytype_int16 yyss_alloc;
482 YYSTYPE yyvs_alloc;]b4_locations_if([
483 YYLTYPE yyls_alloc;])[
484 };
485
486 /* The size of the maximum gap between one aligned stack and the next. */
487 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
488
489 /* The size of an array large to enough to hold all stacks, each with
490 N elements. */
491 ]b4_locations_if(
492 [# define YYSTACK_BYTES(N) \
493 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
494 + 2 * YYSTACK_GAP_MAXIMUM)],
495 [# define YYSTACK_BYTES(N) \
496 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
497 + YYSTACK_GAP_MAXIMUM)])[
498
499 /* Copy COUNT objects from FROM to TO. The source and destination do
500 not overlap. */
501 # ifndef YYCOPY
502 # if defined __GNUC__ && 1 < __GNUC__
503 # define YYCOPY(To, From, Count) \
504 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
505 # else
506 # define YYCOPY(To, From, Count) \
507 do \
508 { \
509 YYSIZE_T yyi; \
510 for (yyi = 0; yyi < (Count); yyi++) \
511 (To)[yyi] = (From)[yyi]; \
512 } \
513 while (YYID (0))
514 # endif
515 # endif
516
517 /* Relocate STACK from its old location to the new one. The
518 local variables YYSIZE and YYSTACKSIZE give the old and new number of
519 elements in the stack, and YYPTR gives the new location of the
520 stack. Advance YYPTR to a properly aligned location for the next
521 stack. */
522 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
523 do \
524 { \
525 YYSIZE_T yynewbytes; \
526 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
527 Stack = &yyptr->Stack_alloc; \
528 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
529 yyptr += yynewbytes / sizeof (*yyptr); \
530 } \
531 while (YYID (0))
532
533 #endif
534
535 /* YYFINAL -- State number of the termination state. */
536 #define YYFINAL ]b4_final_state_number[
537 /* YYLAST -- Last index in YYTABLE. */
538 #define YYLAST ]b4_last[
539
540 /* YYNTOKENS -- Number of terminals. */
541 #define YYNTOKENS ]b4_tokens_number[
542 /* YYNNTS -- Number of nonterminals. */
543 #define YYNNTS ]b4_nterms_number[
544 /* YYNRULES -- Number of rules. */
545 #define YYNRULES ]b4_rules_number[
546 /* YYNSTATES -- Number of states. */
547 #define YYNSTATES ]b4_states_number[
548
549 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
550 by yylex, with out-of-bounds checking. */
551 #define YYUNDEFTOK ]b4_undef_token_number[
552 #define YYMAXUTOK ]b4_user_token_number_max[
553
554 #define YYTRANSLATE(YYX) \
555 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
556
557 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
558 as returned by yylex, without out-of-bounds checking. */
559 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
560 {
561 ]b4_translate[
562 };
563
564 #if YYDEBUG
565 ]b4_integral_parser_table_define([rline], [b4_rline],
566 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
567 #endif
568
569 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
570 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
571 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
572 static const char *const yytname[] =
573 {
574 ]b4_tname[
575 };
576 #endif
577
578 # ifdef YYPRINT
579 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
580 (internal) symbol number NUM (which must be that of a token). */
581 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
582 {
583 ]b4_toknum[
584 };
585 # endif
586
587 #define YYPACT_NINF ]b4_pact_ninf[
588
589 #define yypact_value_is_default(yystate) \
590 ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
591
592 #define YYTABLE_NINF ]b4_table_ninf[
593
594 #define yytable_value_is_error(yytable_value) \
595 ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
596
597 ]b4_parser_tables_define[
598
599 #define yyerrok (yyerrstatus = 0)
600 #define yyclearin (yychar = YYEMPTY)
601 #define YYEMPTY (-2)
602 #define YYEOF 0
603
604 #define YYACCEPT goto yyacceptlab
605 #define YYABORT goto yyabortlab
606 #define YYERROR goto yyerrorlab
607
608
609 /* Like YYERROR except do call yyerror. This remains here temporarily
610 to ease the transition to the new meaning of YYERROR, for GCC.
611 Once GCC version 2 has supplanted version 1, this can go. However,
612 YYFAIL appears to be in use. Nevertheless, it is formally deprecated
613 in Bison 2.4.2's NEWS entry, where a plan to phase it out is
614 discussed. */
615
616 #define YYFAIL goto yyerrlab
617 #if defined YYFAIL
618 /* This is here to suppress warnings from the GCC cpp's
619 -Wunused-macros. Normally we don't worry about that warning, but
620 some users do, and we want to make it easy for users to remove
621 YYFAIL uses, which will produce warnings from Bison 2.5. */
622 #endif
623
624 #define YYRECOVERING() (!!yyerrstatus)
625
626 #define YYBACKUP(Token, Value) \
627 do \
628 if (yychar == YYEMPTY && yylen == 1) \
629 { \
630 yychar = (Token); \
631 yylval = (Value); \
632 YYPOPSTACK (1); \
633 goto yybackup; \
634 } \
635 else \
636 { \
637 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
638 YYERROR; \
639 } \
640 while (YYID (0))
641
642
643 #define YYTERROR 1
644 #define YYERRCODE 256
645
646
647 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
648 If N is 0, then set CURRENT to the empty location which ends
649 the previous symbol: RHS[0] (always defined). */
650
651 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
652 #ifndef YYLLOC_DEFAULT
653 # define YYLLOC_DEFAULT(Current, Rhs, N) \
654 do \
655 if (YYID (N)) \
656 { \
657 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
658 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
659 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
660 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
661 } \
662 else \
663 { \
664 (Current).first_line = (Current).last_line = \
665 YYRHSLOC (Rhs, 0).last_line; \
666 (Current).first_column = (Current).last_column = \
667 YYRHSLOC (Rhs, 0).last_column; \
668 } \
669 while (YYID (0))
670 #endif]b4_locations_if([[
671
672
673 /* YY_LOCATION_PRINT -- Print the location on the stream.
674 This macro was not mandated originally: define only if we know
675 we won't break user code: when these are the locations we know. */
676
677 #ifndef YY_LOCATION_PRINT
678 # if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
679 # define YY_LOCATION_PRINT(File, Loc) \
680 fprintf (File, "%d.%d-%d.%d", \
681 (Loc).first_line, (Loc).first_column, \
682 (Loc).last_line, (Loc).last_column)
683 # else
684 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
685 # endif
686 #endif]], [[
687
688
689 /* This macro is provided for backward compatibility. */
690
691 #ifndef YY_LOCATION_PRINT
692 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
693 #endif]])[
694
695
696 /* YYLEX -- calling `yylex' with the right arguments. */
697
698 #ifdef YYLEX_PARAM
699 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
700 #else
701 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
702 #endif
703
704 /* Enable debugging if requested. */
705 #if YYDEBUG
706
707 # ifndef YYFPRINTF
708 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
709 # define YYFPRINTF fprintf
710 # endif
711
712 # define YYDPRINTF(Args) \
713 do { \
714 if (yydebug) \
715 YYFPRINTF Args; \
716 } while (YYID (0))
717
718 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
719 do { \
720 if (yydebug) \
721 { \
722 YYFPRINTF (stderr, "%s ", Title); \
723 yy_symbol_print (stderr, \
724 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
725 YYFPRINTF (stderr, "\n"); \
726 } \
727 } while (YYID (0))
728
729 ]b4_yy_symbol_print_generate([b4_c_function_def])[
730
731 /*------------------------------------------------------------------.
732 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
733 | TOP (included). |
734 `------------------------------------------------------------------*/
735
736 ]b4_c_function_def([yy_stack_print], [static void],
737 [[yytype_int16 *yybottom], [yybottom]],
738 [[yytype_int16 *yytop], [yytop]])[
739 {
740 YYFPRINTF (stderr, "Stack now");
741 for (; yybottom <= yytop; yybottom++)
742 {
743 int yybot = *yybottom;
744 YYFPRINTF (stderr, " %d", yybot);
745 }
746 YYFPRINTF (stderr, "\n");
747 }
748
749 # define YY_STACK_PRINT(Bottom, Top) \
750 do { \
751 if (yydebug) \
752 yy_stack_print ((Bottom), (Top)); \
753 } while (YYID (0))
754
755
756 /*------------------------------------------------.
757 | Report that the YYRULE is going to be reduced. |
758 `------------------------------------------------*/
759
760 ]b4_c_function_def([yy_reduce_print], [static void],
761 [[yytype_int16 *yyssp], [yyssp]],
762 [[YYSTYPE *yyvsp], [yyvsp]],
763 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
764 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
765 b4_parse_param]))[
766 {
767 unsigned long int yylno = yyrline[yyrule];
768 int yynrhs = yyr2[yyrule];
769 int yyi;
770 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
771 yyrule - 1, yylno);
772 /* The symbols being reduced. */
773 for (yyi = 0; yyi < yynrhs; yyi++)
774 {
775 YYFPRINTF (stderr, " $%d = ", yyi + 1);
776 yy_symbol_print (stderr,
777 yystos[yyssp[yyi + 1 - yynrhs]],
778 &]b4_rhs_value(yynrhs, yyi + 1)[
779 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
780 b4_user_args[);
781 YYFPRINTF (stderr, "\n");
782 }
783 }
784
785 # define YY_REDUCE_PRINT(Rule) \
786 do { \
787 if (yydebug) \
788 yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
789 } while (YYID (0))
790
791 /* Nonzero means print parse trace. It is left uninitialized so that
792 multiple parsers can coexist. */
793 int yydebug;
794 #else /* !YYDEBUG */
795 # define YYDPRINTF(Args)
796 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
797 # define YY_STACK_PRINT(Bottom, Top)
798 # define YY_REDUCE_PRINT(Rule)
799 #endif /* !YYDEBUG */
800
801
802 /* YYINITDEPTH -- initial size of the parser's stacks. */
803 #ifndef YYINITDEPTH
804 # define YYINITDEPTH ]b4_stack_depth_init[
805 #endif
806
807 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
808 if the built-in stack extension method is used).
809
810 Do not make this value too large; the results are undefined if
811 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
812 evaluated with infinite-precision integer arithmetic. */
813
814 #ifndef YYMAXDEPTH
815 # define YYMAXDEPTH ]b4_stack_depth_max[
816 #endif
817
818 \f
819
820 #if YYERROR_VERBOSE
821
822 # ifndef yystrlen
823 # if defined __GLIBC__ && defined _STRING_H
824 # define yystrlen strlen
825 # else
826 /* Return the length of YYSTR. */
827 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
828 [[const char *yystr], [yystr]])[
829 {
830 YYSIZE_T yylen;
831 for (yylen = 0; yystr[yylen]; yylen++)
832 continue;
833 return yylen;
834 }
835 # endif
836 # endif
837
838 # ifndef yystpcpy
839 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
840 # define yystpcpy stpcpy
841 # else
842 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
843 YYDEST. */
844 ]b4_c_function_def([yystpcpy], [static char *],
845 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
846 {
847 char *yyd = yydest;
848 const char *yys = yysrc;
849
850 while ((*yyd++ = *yys++) != '\0')
851 continue;
852
853 return yyd - 1;
854 }
855 # endif
856 # endif
857
858 # ifndef yytnamerr
859 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
860 quotes and backslashes, so that it's suitable for yyerror. The
861 heuristic is that double-quoting is unnecessary unless the string
862 contains an apostrophe, a comma, or backslash (other than
863 backslash-backslash). YYSTR is taken from yytname. If YYRES is
864 null, do not copy; instead, return the length of what the result
865 would have been. */
866 static YYSIZE_T
867 yytnamerr (char *yyres, const char *yystr)
868 {
869 if (*yystr == '"')
870 {
871 YYSIZE_T yyn = 0;
872 char const *yyp = yystr;
873
874 for (;;)
875 switch (*++yyp)
876 {
877 case '\'':
878 case ',':
879 goto do_not_strip_quotes;
880
881 case '\\':
882 if (*++yyp != '\\')
883 goto do_not_strip_quotes;
884 /* Fall through. */
885 default:
886 if (yyres)
887 yyres[yyn] = *yyp;
888 yyn++;
889 break;
890
891 case '"':
892 if (yyres)
893 yyres[yyn] = '\0';
894 return yyn;
895 }
896 do_not_strip_quotes: ;
897 }
898
899 if (! yyres)
900 return yystrlen (yystr);
901
902 return yystpcpy (yyres, yystr) - yyres;
903 }
904 # endif
905
906 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
907 about the unexpected token YYTOKEN while in state YYSTATE.
908
909 Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is
910 not large enough to hold the message. In that case, also set
911 *YYMSG_ALLOC to the required number of bytes. Return 2 if the
912 required number of bytes is too large to store. */
913 static int
914 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
915 int yystate, int yytoken)
916 {
917 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);
918 YYSIZE_T yysize = yysize0;
919 YYSIZE_T yysize1;
920 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
921 /* Internationalized format string. */
922 const char *yyformat = 0;
923 /* Arguments of yyformat. */
924 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
925 /* Number of reported tokens (one for the "unexpected", one per
926 "expected"). */
927 int yycount = 0;
928
929 /* There are many possibilities here to consider:
930 - Assume YYFAIL is not used. It's too flawed to consider. See
931 <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
932 for details. YYERROR is fine as it does not invoke this
933 function.
934 - If this state is a consistent state with a default action, then
935 the only way this function was invoked is if the default action
936 is an error action. In that case, don't check for expected
937 tokens because there are none.
938 - The only way there can be no lookahead present (in yychar) is if
939 this state is a consistent state with a default action. Thus,
940 detecting the absence of a lookahead is sufficient to determine
941 that there is no unexpected or expected token to report. In that
942 case, just report a simple "syntax error".
943 - Don't assume there isn't a lookahead just because this state is a
944 consistent state with a default action. There might have been a
945 previous inconsistent state, consistent state with a non-default
946 action, or user semantic action that manipulated yychar.
947 - Of course, the expected token list depends on states to have
948 correct lookahead information, and it depends on the parser not
949 to perform extra reductions after fetching a lookahead from the
950 scanner and before detecting a syntax error. Thus, state merging
951 (from LALR or IELR) and default reductions corrupt the expected
952 token list. However, the list is correct for canonical LR with
953 one exception: it will still contain any token that will not be
954 accepted due to an error action in a later state.
955 */
956 if (yytoken != YYEMPTY)
957 {
958 int yyn = yypact[yystate];
959 yyarg[yycount++] = yytname[yytoken];
960 if (!yypact_value_is_default (yyn))
961 {
962 /* Start YYX at -YYN if negative to avoid negative indexes in
963 YYCHECK. In other words, skip the first -YYN actions for
964 this state because they are default actions. */
965 int yyxbegin = yyn < 0 ? -yyn : 0;
966 /* Stay within bounds of both yycheck and yytname. */
967 int yychecklim = YYLAST - yyn + 1;
968 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
969 int yyx;
970 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
971 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
972 && !yytable_value_is_error (yytable[yyx + yyn]))
973 {
974 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
975 {
976 yycount = 1;
977 yysize = yysize0;
978 break;
979 }
980 yyarg[yycount++] = yytname[yyx];
981 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
982 if (! (yysize <= yysize1
983 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
984 return 2;
985 yysize = yysize1;
986 }
987 }
988 }
989
990 switch (yycount)
991 {
992 #define YYCASE_(N, S) \
993 case N: \
994 yyformat = S; \
995 break
996 YYCASE_(0, YY_("syntax error"));
997 YYCASE_(1, YY_("syntax error, unexpected %s"));
998 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
999 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
1000 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
1001 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
1002 #undef YYCASE_
1003 }
1004
1005 yysize1 = yysize + yystrlen (yyformat);
1006 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
1007 return 2;
1008 yysize = yysize1;
1009
1010 if (*yymsg_alloc < yysize)
1011 {
1012 *yymsg_alloc = 2 * yysize;
1013 if (! (yysize <= *yymsg_alloc
1014 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
1015 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
1016 return 1;
1017 }
1018
1019 /* Avoid sprintf, as that infringes on the user's name space.
1020 Don't have undefined behavior even if the translation
1021 produced a string with the wrong number of "%s"s. */
1022 {
1023 char *yyp = *yymsg;
1024 int yyi = 0;
1025 while ((*yyp = *yyformat) != '\0')
1026 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1027 {
1028 yyp += yytnamerr (yyp, yyarg[yyi++]);
1029 yyformat += 2;
1030 }
1031 else
1032 {
1033 yyp++;
1034 yyformat++;
1035 }
1036 }
1037 return 0;
1038 }
1039 #endif /* YYERROR_VERBOSE */
1040 \f
1041
1042 ]b4_yydestruct_generate([b4_c_function_def])b4_push_if([], [[
1043
1044
1045 /* Prevent warnings from -Wmissing-prototypes. */
1046 #ifdef YYPARSE_PARAM
1047 ]b4_c_function_decl([yyparse], [int],
1048 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1049 #else /* ! YYPARSE_PARAM */
1050 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1051 #endif /* ! YYPARSE_PARAM */]])b4_pure_if([], [
1052
1053 b4_declare_scanner_communication_variables])[]b4_push_if([[
1054
1055
1056 struct yypstate
1057 {]b4_declare_parser_state_variables[
1058 /* Used to determine if this is the first time this instance has
1059 been used. */
1060 int yynew;
1061 };]b4_pure_if([], [[
1062
1063 static char yypstate_allocated = 0;]])b4_pull_if([
1064
1065 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1066 {
1067 return yypull_parse (0]m4_ifset([b4_parse_param],
1068 [[, ]b4_c_args(b4_parse_param)])[);
1069 }
1070
1071 ]b4_c_function_def([[yypull_parse]], [[int]],
1072 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1073 b4_parse_param]))[
1074 {
1075 int yystatus;
1076 yypstate *yyps_local;]b4_pure_if([[
1077 int yychar;
1078 YYSTYPE yylval;]b4_locations_if([[
1079 YYLTYPE yylloc;]])])[
1080 if (yyps == 0)
1081 {
1082 yyps_local = yypstate_new ();
1083 if (!yyps_local)
1084 {]b4_pure_if([[
1085 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1086 if (!yypstate_allocated)
1087 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1088 return 2;
1089 }
1090 }
1091 else
1092 yyps_local = yyps;
1093 do {
1094 yychar = YYLEX;
1095 yystatus =
1096 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1097 } while (yystatus == YYPUSH_MORE);
1098 if (yyps == 0)
1099 yypstate_delete (yyps_local);
1100 return yystatus;
1101 }]])[
1102
1103 /* Initialize the parser data structure. */
1104 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1105 {
1106 yypstate *yyps;]b4_pure_if([], [[
1107 if (yypstate_allocated)
1108 return 0;]])[
1109 yyps = (yypstate *) malloc (sizeof *yyps);
1110 if (!yyps)
1111 return 0;
1112 yyps->yynew = 1;]b4_pure_if([], [[
1113 yypstate_allocated = 1;]])[
1114 return yyps;
1115 }
1116
1117 ]b4_c_function_def([[yypstate_delete]], [[void]],
1118 [[[yypstate *yyps]], [[yyps]]])[
1119 {
1120 #ifndef yyoverflow
1121 /* If the stack was reallocated but the parse did not complete, then the
1122 stack still needs to be freed. */
1123 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1124 YYSTACK_FREE (yyps->yyss);
1125 #endif
1126 free (yyps);]b4_pure_if([], [[
1127 yypstate_allocated = 0;]])[
1128 }
1129 ]b4_pure_if([[
1130 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1131 #define yystate yyps->yystate
1132 #define yyerrstatus yyps->yyerrstatus
1133 #define yyssa yyps->yyssa
1134 #define yyss yyps->yyss
1135 #define yyssp yyps->yyssp
1136 #define yyvsa yyps->yyvsa
1137 #define yyvs yyps->yyvs
1138 #define yyvsp yyps->yyvsp]b4_locations_if([[
1139 #define yylsa yyps->yylsa
1140 #define yyls yyps->yyls
1141 #define yylsp yyps->yylsp
1142 #define yyerror_range yyps->yyerror_range]])[
1143 #define yystacksize yyps->yystacksize
1144
1145
1146 /*---------------.
1147 | yypush_parse. |
1148 `---------------*/
1149
1150 ]b4_c_function_def([[yypush_parse]], [[int]],
1151 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1152 [[[int yypushed_char]], [[yypushed_char]]],
1153 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1154 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1155 b4_parse_param]))], [[
1156
1157
1158 /*----------.
1159 | yyparse. |
1160 `----------*/
1161
1162 #ifdef YYPARSE_PARAM
1163 ]b4_c_function_def([yyparse], [int],
1164 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1165 #else /* ! YYPARSE_PARAM */
1166 ]b4_c_function_def([yyparse], [int], b4_parse_param)[
1167 #endif]])[
1168 {]b4_pure_if([b4_declare_scanner_communication_variables
1169 ])b4_push_if([b4_pure_if([], [[
1170 int yypushed_char = yychar;
1171 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1172 YYLTYPE yypushed_loc = yylloc;]])
1173 ])],
1174 [b4_declare_parser_state_variables
1175 ])[
1176 int yyn;
1177 int yyresult;
1178 /* Lookahead token as an internal (translated) token number. */
1179 int yytoken;
1180 /* The variables used to return semantic value and location from the
1181 action routines. */
1182 YYSTYPE yyval;]b4_locations_if([[
1183 YYLTYPE yyloc;]])[
1184
1185 #if YYERROR_VERBOSE
1186 /* Buffer for error messages, and its allocated size. */
1187 char yymsgbuf[128];
1188 char *yymsg = yymsgbuf;
1189 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1190 #endif
1191
1192 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1193
1194 /* The number of symbols on the RHS of the reduced rule.
1195 Keep to zero when no symbol should be popped. */
1196 int yylen = 0;]b4_push_if([[
1197
1198 if (!yyps->yynew)
1199 {
1200 yyn = yypact[yystate];
1201 goto yyread_pushed_token;
1202 }]])[
1203
1204 yytoken = 0;
1205 yyss = yyssa;
1206 yyvs = yyvsa;]b4_locations_if([[
1207 yyls = yylsa;]])[
1208 yystacksize = YYINITDEPTH;
1209
1210 YYDPRINTF ((stderr, "Starting parse\n"));
1211
1212 yystate = 0;
1213 yyerrstatus = 0;
1214 yynerrs = 0;
1215 yychar = YYEMPTY; /* Cause a token to be read. */
1216
1217 /* Initialize stack pointers.
1218 Waste one element of value and location stack
1219 so that they stay on the same level as the state stack.
1220 The wasted elements are never initialized. */
1221 yyssp = yyss;
1222 yyvsp = yyvs;]b4_locations_if([[
1223 yylsp = yyls;
1224
1225 #if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
1226 /* Initialize the default location before parsing starts. */
1227 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1228 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1229 #endif]])
1230 m4_ifdef([b4_initial_action],[
1231 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1232 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1233 /* User initialization code. */
1234 b4_user_initial_action
1235 m4_popdef([b4_dollar_dollar])dnl
1236 m4_popdef([b4_at_dollar])])dnl
1237 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1238 ]])dnl
1239 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1240 ]])[
1241 goto yysetstate;
1242
1243 /*------------------------------------------------------------.
1244 | yynewstate -- Push a new state, which is found in yystate. |
1245 `------------------------------------------------------------*/
1246 yynewstate:
1247 /* In all cases, when you get here, the value and location stacks
1248 have just been pushed. So pushing a state here evens the stacks. */
1249 yyssp++;
1250
1251 yysetstate:
1252 *yyssp = yystate;
1253
1254 if (yyss + yystacksize - 1 <= yyssp)
1255 {
1256 /* Get the current used size of the three stacks, in elements. */
1257 YYSIZE_T yysize = yyssp - yyss + 1;
1258
1259 #ifdef yyoverflow
1260 {
1261 /* Give user a chance to reallocate the stack. Use copies of
1262 these so that the &'s don't force the real ones into
1263 memory. */
1264 YYSTYPE *yyvs1 = yyvs;
1265 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1266 YYLTYPE *yyls1 = yyls;])[
1267
1268 /* Each stack pointer address is followed by the size of the
1269 data in use in that stack, in bytes. This used to be a
1270 conditional around just the two extra args, but that might
1271 be undefined if yyoverflow is a macro. */
1272 yyoverflow (YY_("memory exhausted"),
1273 &yyss1, yysize * sizeof (*yyssp),
1274 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1275 &yyls1, yysize * sizeof (*yylsp),])[
1276 &yystacksize);
1277 ]b4_locations_if([
1278 yyls = yyls1;])[
1279 yyss = yyss1;
1280 yyvs = yyvs1;
1281 }
1282 #else /* no yyoverflow */
1283 # ifndef YYSTACK_RELOCATE
1284 goto yyexhaustedlab;
1285 # else
1286 /* Extend the stack our own way. */
1287 if (YYMAXDEPTH <= yystacksize)
1288 goto yyexhaustedlab;
1289 yystacksize *= 2;
1290 if (YYMAXDEPTH < yystacksize)
1291 yystacksize = YYMAXDEPTH;
1292
1293 {
1294 yytype_int16 *yyss1 = yyss;
1295 union yyalloc *yyptr =
1296 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1297 if (! yyptr)
1298 goto yyexhaustedlab;
1299 YYSTACK_RELOCATE (yyss_alloc, yyss);
1300 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1301 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1302 # undef YYSTACK_RELOCATE
1303 if (yyss1 != yyssa)
1304 YYSTACK_FREE (yyss1);
1305 }
1306 # endif
1307 #endif /* no yyoverflow */
1308
1309 yyssp = yyss + yysize - 1;
1310 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1311 yylsp = yyls + yysize - 1;])[
1312
1313 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1314 (unsigned long int) yystacksize));
1315
1316 if (yyss + yystacksize - 1 <= yyssp)
1317 YYABORT;
1318 }
1319
1320 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1321
1322 if (yystate == YYFINAL)
1323 YYACCEPT;
1324
1325 goto yybackup;
1326
1327 /*-----------.
1328 | yybackup. |
1329 `-----------*/
1330 yybackup:
1331
1332 /* Do appropriate processing given the current state. Read a
1333 lookahead token if we need one and don't already have one. */
1334
1335 /* First try to decide what to do without reference to lookahead token. */
1336 yyn = yypact[yystate];
1337 if (yypact_value_is_default (yyn))
1338 goto yydefault;
1339
1340 /* Not known => get a lookahead token if don't already have one. */
1341
1342 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1343 if (yychar == YYEMPTY)
1344 {]b4_push_if([[
1345 if (!yyps->yynew)
1346 {]b4_use_push_for_pull_if([], [[
1347 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1348 yyresult = YYPUSH_MORE;
1349 goto yypushreturn;
1350 }
1351 yyps->yynew = 0;]b4_pure_if([], [[
1352 /* Restoring the pushed token is only necessary for the first
1353 yypush_parse invocation since subsequent invocations don't overwrite
1354 it before jumping to yyread_pushed_token. */
1355 yychar = yypushed_char;
1356 yylval = yypushed_val;]b4_locations_if([[
1357 yylloc = yypushed_loc;]])])[
1358 yyread_pushed_token:]])[
1359 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1360 yychar = yypushed_char;
1361 if (yypushed_val)
1362 yylval = *yypushed_val;]b4_locations_if([[
1363 if (yypushed_loc)
1364 yylloc = *yypushed_loc;]])])], [[
1365 yychar = YYLEX;]])[
1366 }
1367
1368 if (yychar <= YYEOF)
1369 {
1370 yychar = yytoken = YYEOF;
1371 YYDPRINTF ((stderr, "Now at end of input.\n"));
1372 }
1373 else
1374 {
1375 yytoken = YYTRANSLATE (yychar);
1376 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1377 }
1378
1379 /* If the proper action on seeing token YYTOKEN is to reduce or to
1380 detect an error, take that action. */
1381 yyn += yytoken;
1382 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1383 goto yydefault;
1384 yyn = yytable[yyn];
1385 if (yyn <= 0)
1386 {
1387 if (yytable_value_is_error (yyn))
1388 goto yyerrlab;
1389 yyn = -yyn;
1390 goto yyreduce;
1391 }
1392
1393 /* Count tokens shifted since error; after three, turn off error
1394 status. */
1395 if (yyerrstatus)
1396 yyerrstatus--;
1397
1398 /* Shift the lookahead token. */
1399 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1400
1401 /* Discard the shifted token. */
1402 yychar = YYEMPTY;
1403
1404 yystate = yyn;
1405 *++yyvsp = yylval;
1406 ]b4_locations_if([ *++yylsp = yylloc;])[
1407 goto yynewstate;
1408
1409
1410 /*-----------------------------------------------------------.
1411 | yydefault -- do the default action for the current state. |
1412 `-----------------------------------------------------------*/
1413 yydefault:
1414 yyn = yydefact[yystate];
1415 if (yyn == 0)
1416 goto yyerrlab;
1417 goto yyreduce;
1418
1419
1420 /*-----------------------------.
1421 | yyreduce -- Do a reduction. |
1422 `-----------------------------*/
1423 yyreduce:
1424 /* yyn is the number of a rule to reduce with. */
1425 yylen = yyr2[yyn];
1426
1427 /* If YYLEN is nonzero, implement the default value of the action:
1428 `$$ = $1'.
1429
1430 Otherwise, the following line sets YYVAL to garbage.
1431 This behavior is undocumented and Bison
1432 users should not rely upon it. Assigning to YYVAL
1433 unconditionally makes the parser a bit smaller, and it avoids a
1434 GCC warning that YYVAL may be used uninitialized. */
1435 yyval = yyvsp[1-yylen];
1436
1437 ]b4_locations_if(
1438 [[ /* Default location. */
1439 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1440 YY_REDUCE_PRINT (yyn);
1441 switch (yyn)
1442 {
1443 ]b4_user_actions[
1444 default: break;
1445 }
1446 /* User semantic actions sometimes alter yychar, and that requires
1447 that yytoken be updated with the new translation. We take the
1448 approach of translating immediately before every use of yytoken.
1449 One alternative is translating here after every semantic action,
1450 but that translation would be missed if the semantic action invokes
1451 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1452 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
1453 incorrect destructor might then be invoked immediately. In the
1454 case of YYERROR or YYBACKUP, subsequent parser actions might lead
1455 to an incorrect destructor call or verbose syntax error message
1456 before the lookahead is translated. */
1457 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1458
1459 YYPOPSTACK (yylen);
1460 yylen = 0;
1461 YY_STACK_PRINT (yyss, yyssp);
1462
1463 *++yyvsp = yyval;]b4_locations_if([
1464 *++yylsp = yyloc;])[
1465
1466 /* Now `shift' the result of the reduction. Determine what state
1467 that goes to, based on the state we popped back to and the rule
1468 number reduced by. */
1469
1470 yyn = yyr1[yyn];
1471
1472 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1473 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1474 yystate = yytable[yystate];
1475 else
1476 yystate = yydefgoto[yyn - YYNTOKENS];
1477
1478 goto yynewstate;
1479
1480
1481 /*------------------------------------.
1482 | yyerrlab -- here on detecting error |
1483 `------------------------------------*/
1484 yyerrlab:
1485 /* Make sure we have latest lookahead translation. See comments at
1486 user semantic actions for why this is necessary. */
1487 yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
1488
1489 /* If not already recovering from an error, report this error. */
1490 if (!yyerrstatus)
1491 {
1492 ++yynerrs;
1493 #if ! YYERROR_VERBOSE
1494 yyerror (]b4_yyerror_args[YY_("syntax error"));
1495 #else
1496 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, yystate, \
1497 yytoken)
1498 {
1499 char const *yymsgp = YY_("syntax error");
1500 int yysyntax_error_status = YYSYNTAX_ERROR;
1501 if (yysyntax_error_status == 0)
1502 yymsgp = yymsg;
1503 else if (yysyntax_error_status == 1)
1504 {
1505 if (yymsg != yymsgbuf)
1506 YYSTACK_FREE (yymsg);
1507 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1508 if (!yymsg)
1509 {
1510 yymsg = yymsgbuf;
1511 yymsg_alloc = sizeof yymsgbuf;
1512 yysyntax_error_status = 2;
1513 }
1514 else
1515 {
1516 yysyntax_error_status = YYSYNTAX_ERROR;
1517 yymsgp = yymsg;
1518 }
1519 }
1520 yyerror (]b4_yyerror_args[yymsgp);
1521 if (yysyntax_error_status == 2)
1522 goto yyexhaustedlab;
1523 }
1524 # undef YYSYNTAX_ERROR
1525 #endif
1526 }
1527
1528 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
1529
1530 if (yyerrstatus == 3)
1531 {
1532 /* If just tried and failed to reuse lookahead token after an
1533 error, discard it. */
1534
1535 if (yychar <= YYEOF)
1536 {
1537 /* Return failure if at end of input. */
1538 if (yychar == YYEOF)
1539 YYABORT;
1540 }
1541 else
1542 {
1543 yydestruct ("Error: discarding",
1544 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1545 yychar = YYEMPTY;
1546 }
1547 }
1548
1549 /* Else will try to reuse lookahead token after shifting the error
1550 token. */
1551 goto yyerrlab1;
1552
1553
1554 /*---------------------------------------------------.
1555 | yyerrorlab -- error raised explicitly by YYERROR. |
1556 `---------------------------------------------------*/
1557 yyerrorlab:
1558
1559 /* Pacify compilers like GCC when the user code never invokes
1560 YYERROR and the label yyerrorlab therefore never appears in user
1561 code. */
1562 if (/*CONSTCOND*/ 0)
1563 goto yyerrorlab;
1564
1565 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
1566 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1567 this YYERROR. */
1568 YYPOPSTACK (yylen);
1569 yylen = 0;
1570 YY_STACK_PRINT (yyss, yyssp);
1571 yystate = *yyssp;
1572 goto yyerrlab1;
1573
1574
1575 /*-------------------------------------------------------------.
1576 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1577 `-------------------------------------------------------------*/
1578 yyerrlab1:
1579 yyerrstatus = 3; /* Each real token shifted decrements this. */
1580
1581 for (;;)
1582 {
1583 yyn = yypact[yystate];
1584 if (!yypact_value_is_default (yyn))
1585 {
1586 yyn += YYTERROR;
1587 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1588 {
1589 yyn = yytable[yyn];
1590 if (0 < yyn)
1591 break;
1592 }
1593 }
1594
1595 /* Pop the current state because it cannot handle the error token. */
1596 if (yyssp == yyss)
1597 YYABORT;
1598
1599 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
1600 yydestruct ("Error: popping",
1601 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1602 YYPOPSTACK (1);
1603 yystate = *yyssp;
1604 YY_STACK_PRINT (yyss, yyssp);
1605 }
1606
1607 *++yyvsp = yylval;
1608 ]b4_locations_if([[
1609 yyerror_range[2] = yylloc;
1610 /* Using YYLLOC is tempting, but would change the location of
1611 the lookahead. YYLOC is available though. */
1612 YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1613 *++yylsp = yyloc;]])[
1614
1615 /* Shift the error token. */
1616 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1617
1618 yystate = yyn;
1619 goto yynewstate;
1620
1621
1622 /*-------------------------------------.
1623 | yyacceptlab -- YYACCEPT comes here. |
1624 `-------------------------------------*/
1625 yyacceptlab:
1626 yyresult = 0;
1627 goto yyreturn;
1628
1629 /*-----------------------------------.
1630 | yyabortlab -- YYABORT comes here. |
1631 `-----------------------------------*/
1632 yyabortlab:
1633 yyresult = 1;
1634 goto yyreturn;
1635
1636 #if !defined(yyoverflow) || YYERROR_VERBOSE
1637 /*-------------------------------------------------.
1638 | yyexhaustedlab -- memory exhaustion comes here. |
1639 `-------------------------------------------------*/
1640 yyexhaustedlab:
1641 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1642 yyresult = 2;
1643 /* Fall through. */
1644 #endif
1645
1646 yyreturn:
1647 if (yychar != YYEMPTY)
1648 {
1649 /* Make sure we have latest lookahead translation. See comments at
1650 user semantic actions for why this is necessary. */
1651 yytoken = YYTRANSLATE (yychar);
1652 yydestruct ("Cleanup: discarding lookahead",
1653 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1654 }
1655 /* Do not reclaim the symbols of the rule which action triggered
1656 this YYABORT or YYACCEPT. */
1657 YYPOPSTACK (yylen);
1658 YY_STACK_PRINT (yyss, yyssp);
1659 while (yyssp != yyss)
1660 {
1661 yydestruct ("Cleanup: popping",
1662 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1663 YYPOPSTACK (1);
1664 }
1665 #ifndef yyoverflow
1666 if (yyss != yyssa)
1667 YYSTACK_FREE (yyss);
1668 #endif]b4_push_if([[
1669 yyps->yynew = 1;
1670
1671 yypushreturn:]])[
1672 #if YYERROR_VERBOSE
1673 if (yymsg != yymsgbuf)
1674 YYSTACK_FREE (yymsg);
1675 #endif
1676 /* Make sure YYID is used. */
1677 return YYID (yyresult);
1678 }
1679
1680 ]b4_epilogue[]dnl
1681 b4_defines_if(
1682 [@output(b4_spec_defines_file@)@
1683 b4_copyright([Interface for Bison's Yacc-like parsers in C])dnl
1684
1685 b4_percent_code_get([[requires]])[]dnl
1686
1687 b4_token_enums_defines(b4_tokens)
1688
1689 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1690 ]m4_ifdef([b4_stype],
1691 [[typedef union ]b4_union_name[
1692 {
1693 ]b4_user_stype[
1694 } YYSTYPE;
1695 # define YYSTYPE_IS_TRIVIAL 1]],
1696 [m4_if(b4_tag_seen_flag, 0,
1697 [[typedef int YYSTYPE;
1698 # define YYSTYPE_IS_TRIVIAL 1]])])[
1699 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1700 # define YYSTYPE_IS_DECLARED 1
1701 #endif
1702
1703 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
1704
1705 b4_locations_if(
1706 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1707 typedef struct YYLTYPE
1708 {
1709 int first_line;
1710 int first_column;
1711 int last_line;
1712 int last_column;
1713 } YYLTYPE;
1714 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1715 # define YYLTYPE_IS_DECLARED 1
1716 # define YYLTYPE_IS_TRIVIAL 1
1717 #endif
1718
1719 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
1720 )dnl b4_locations_if
1721 b4_push_if([[
1722 #ifndef YYPUSH_DECLS
1723 # define YYPUSH_DECLS
1724 struct ]b4_prefix[pstate;
1725 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1726 enum { YYPUSH_MORE = 4 };
1727 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
1728 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
1729 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
1730 [[[int yypushed_char]], [[yypushed_char]]],
1731 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1732 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1733 b4_parse_param]))
1734 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
1735 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1736 b4_parse_param]))])
1737 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
1738 [[[void]], []])
1739 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
1740 [[b4_prefix[pstate *yyps]], [[yyps]]])[
1741 #endif
1742 ]])
1743 b4_percent_code_get([[provides]])[]dnl
1744 ])dnl b4_defines_if
1745 m4_divert_pop(0)
1746 m4_popdef([b4_copyright_years])
bison