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[bison.git] / data / yacc.c
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 _STDLIB_H && ]b4_c_modern[
423 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
424 # ifndef _STDLIB_H
425 # define _STDLIB_H 1
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 _STDLIB_H \
450 && ! ((defined YYMALLOC || defined malloc) \
451 && (defined YYFREE || defined free)))
452 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
453 # ifndef _STDLIB_H
454 # define _STDLIB_H 1
455 # endif
456 # endif
457 # ifndef YYMALLOC
458 # define YYMALLOC malloc
459 # if ! defined malloc && ! defined _STDLIB_H && ]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 _STDLIB_H && ]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 an ordinary
910 "syntax error" message will suffice instead. Return 2 if *YYMSG is
911 not large enough to hold the message. In the last case, also set
912 *YYMSG_ALLOC to either (a) the required number of bytes or (b) zero
913 if the required number of bytes is too large to store. */
914 static int
915 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
916 int yystate, int yytoken)
917 {
918 int yyn = yypact[yystate];
919
920 if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
921 return 1;
922 else
923 {
924 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);
925 YYSIZE_T yysize = yysize0;
926 YYSIZE_T yysize1;
927 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
928 /* Internationalized format string. */
929 const char *yyformat = 0;
930 /* Arguments of yyformat. */
931 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
932
933 /* Start YYX at -YYN if negative to avoid negative indexes in
934 YYCHECK. In other words, skip the first -YYN actions for this
935 state because they are default actions. */
936 int yyxbegin = yyn < 0 ? -yyn : 0;
937
938 /* Stay within bounds of both yycheck and yytname. */
939 int yychecklim = YYLAST - yyn + 1;
940 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
941 /* Number of reported tokens (one for the "unexpected", one per
942 "expected"). */
943 int yycount = 0;
944 int yyx;
945
946 yyarg[yycount++] = yytname[yytoken];
947
948 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
949 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
950 && !yytable_value_is_error (yytable[yyx + yyn]))
951 {
952 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
953 {
954 yycount = 1;
955 yysize = yysize0;
956 break;
957 }
958 yyarg[yycount++] = yytname[yyx];
959 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
960 if (! (yysize <= yysize1
961 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
962 {
963 /* Overflow. */
964 *yymsg_alloc = 0;
965 return 2;
966 }
967 yysize = yysize1;
968 }
969
970 switch (yycount)
971 {
972 #define YYCASE_(N, S) \
973 case N: \
974 yyformat = S; \
975 break
976 YYCASE_(1, YY_("syntax error, unexpected %s"));
977 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
978 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
979 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
980 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
981 #undef YYCASE_
982 }
983
984 yysize1 = yysize + yystrlen (yyformat);
985 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
986 {
987 /* Overflow. */
988 *yymsg_alloc = 0;
989 return 2;
990 }
991 yysize = yysize1;
992
993 if (*yymsg_alloc < yysize)
994 {
995 *yymsg_alloc = 2 * yysize;
996 if (! (yysize <= *yymsg_alloc
997 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
998 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
999 return 2;
1000 }
1001
1002 /* Avoid sprintf, as that infringes on the user's name space.
1003 Don't have undefined behavior even if the translation
1004 produced a string with the wrong number of "%s"s. */
1005 {
1006 char *yyp = *yymsg;
1007 int yyi = 0;
1008 while ((*yyp = *yyformat) != '\0')
1009 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1010 {
1011 yyp += yytnamerr (yyp, yyarg[yyi++]);
1012 yyformat += 2;
1013 }
1014 else
1015 {
1016 yyp++;
1017 yyformat++;
1018 }
1019 }
1020 return 0;
1021 }
1022 }
1023 #endif /* YYERROR_VERBOSE */
1024 \f
1025
1026 ]b4_yydestruct_generate([b4_c_function_def])b4_push_if([], [[
1027
1028
1029 /* Prevent warnings from -Wmissing-prototypes. */
1030 #ifdef YYPARSE_PARAM
1031 ]b4_c_function_decl([yyparse], [int],
1032 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1033 #else /* ! YYPARSE_PARAM */
1034 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1035 #endif /* ! YYPARSE_PARAM */]])b4_pure_if([], [
1036
1037 b4_declare_scanner_communication_variables])[]b4_push_if([[
1038
1039
1040 struct yypstate
1041 {]b4_declare_parser_state_variables[
1042 /* Used to determine if this is the first time this instance has
1043 been used. */
1044 int yynew;
1045 };]b4_pure_if([], [[
1046
1047 static char yypstate_allocated = 0;]])b4_pull_if([
1048
1049 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1050 {
1051 return yypull_parse (0]m4_ifset([b4_parse_param],
1052 [[, ]b4_c_args(b4_parse_param)])[);
1053 }
1054
1055 ]b4_c_function_def([[yypull_parse]], [[int]],
1056 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1057 b4_parse_param]))[
1058 {
1059 int yystatus;
1060 yypstate *yyps_local;]b4_pure_if([[
1061 int yychar;
1062 YYSTYPE yylval;]b4_locations_if([[
1063 YYLTYPE yylloc;]])])[
1064 if (yyps == 0)
1065 {
1066 yyps_local = yypstate_new ();
1067 if (!yyps_local)
1068 {]b4_pure_if([[
1069 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1070 if (!yypstate_allocated)
1071 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1072 return 2;
1073 }
1074 }
1075 else
1076 yyps_local = yyps;
1077 do {
1078 yychar = YYLEX;
1079 yystatus =
1080 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1081 } while (yystatus == YYPUSH_MORE);
1082 if (yyps == 0)
1083 yypstate_delete (yyps_local);
1084 return yystatus;
1085 }]])[
1086
1087 /* Initialize the parser data structure. */
1088 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1089 {
1090 yypstate *yyps;]b4_pure_if([], [[
1091 if (yypstate_allocated)
1092 return 0;]])[
1093 yyps = (yypstate *) malloc (sizeof *yyps);
1094 if (!yyps)
1095 return 0;
1096 yyps->yynew = 1;]b4_pure_if([], [[
1097 yypstate_allocated = 1;]])[
1098 return yyps;
1099 }
1100
1101 ]b4_c_function_def([[yypstate_delete]], [[void]],
1102 [[[yypstate *yyps]], [[yyps]]])[
1103 {
1104 #ifndef yyoverflow
1105 /* If the stack was reallocated but the parse did not complete, then the
1106 stack still needs to be freed. */
1107 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1108 YYSTACK_FREE (yyps->yyss);
1109 #endif
1110 free (yyps);]b4_pure_if([], [[
1111 yypstate_allocated = 0;]])[
1112 }
1113 ]b4_pure_if([[
1114 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1115 #define yystate yyps->yystate
1116 #define yyerrstatus yyps->yyerrstatus
1117 #define yyssa yyps->yyssa
1118 #define yyss yyps->yyss
1119 #define yyssp yyps->yyssp
1120 #define yyvsa yyps->yyvsa
1121 #define yyvs yyps->yyvs
1122 #define yyvsp yyps->yyvsp]b4_locations_if([[
1123 #define yylsa yyps->yylsa
1124 #define yyls yyps->yyls
1125 #define yylsp yyps->yylsp
1126 #define yyerror_range yyps->yyerror_range]])[
1127 #define yystacksize yyps->yystacksize
1128
1129
1130 /*---------------.
1131 | yypush_parse. |
1132 `---------------*/
1133
1134 ]b4_c_function_def([[yypush_parse]], [[int]],
1135 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1136 [[[int yypushed_char]], [[yypushed_char]]],
1137 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1138 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1139 b4_parse_param]))], [[
1140
1141
1142 /*----------.
1143 | yyparse. |
1144 `----------*/
1145
1146 #ifdef YYPARSE_PARAM
1147 ]b4_c_function_def([yyparse], [int],
1148 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1149 #else /* ! YYPARSE_PARAM */
1150 ]b4_c_function_def([yyparse], [int], b4_parse_param)[
1151 #endif]])[
1152 {]b4_pure_if([b4_declare_scanner_communication_variables
1153 ])b4_push_if([b4_pure_if([], [[
1154 int yypushed_char = yychar;
1155 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1156 YYLTYPE yypushed_loc = yylloc;]])
1157 ])],
1158 [b4_declare_parser_state_variables
1159 ])[
1160 int yyn;
1161 int yyresult;
1162 /* Lookahead token as an internal (translated) token number. */
1163 int yytoken;
1164 /* The variables used to return semantic value and location from the
1165 action routines. */
1166 YYSTYPE yyval;]b4_locations_if([[
1167 YYLTYPE yyloc;]])[
1168
1169 #if YYERROR_VERBOSE
1170 /* Buffer for error messages, and its allocated size. */
1171 char yymsgbuf[128];
1172 char *yymsg = yymsgbuf;
1173 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1174 #endif
1175
1176 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1177
1178 /* The number of symbols on the RHS of the reduced rule.
1179 Keep to zero when no symbol should be popped. */
1180 int yylen = 0;]b4_push_if([[
1181
1182 if (!yyps->yynew)
1183 {
1184 yyn = yypact[yystate];
1185 goto yyread_pushed_token;
1186 }]])[
1187
1188 yytoken = 0;
1189 yyss = yyssa;
1190 yyvs = yyvsa;]b4_locations_if([[
1191 yyls = yylsa;]])[
1192 yystacksize = YYINITDEPTH;
1193
1194 YYDPRINTF ((stderr, "Starting parse\n"));
1195
1196 yystate = 0;
1197 yyerrstatus = 0;
1198 yynerrs = 0;
1199 yychar = YYEMPTY; /* Cause a token to be read. */
1200
1201 /* Initialize stack pointers.
1202 Waste one element of value and location stack
1203 so that they stay on the same level as the state stack.
1204 The wasted elements are never initialized. */
1205 yyssp = yyss;
1206 yyvsp = yyvs;]b4_locations_if([[
1207 yylsp = yyls;
1208
1209 #if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
1210 /* Initialize the default location before parsing starts. */
1211 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1212 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1213 #endif]])
1214 m4_ifdef([b4_initial_action],[
1215 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1216 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1217 /* User initialization code. */
1218 b4_user_initial_action
1219 m4_popdef([b4_dollar_dollar])dnl
1220 m4_popdef([b4_at_dollar])])dnl
1221 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1222 ]])dnl
1223 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1224 ]])[
1225 goto yysetstate;
1226
1227 /*------------------------------------------------------------.
1228 | yynewstate -- Push a new state, which is found in yystate. |
1229 `------------------------------------------------------------*/
1230 yynewstate:
1231 /* In all cases, when you get here, the value and location stacks
1232 have just been pushed. So pushing a state here evens the stacks. */
1233 yyssp++;
1234
1235 yysetstate:
1236 *yyssp = yystate;
1237
1238 if (yyss + yystacksize - 1 <= yyssp)
1239 {
1240 /* Get the current used size of the three stacks, in elements. */
1241 YYSIZE_T yysize = yyssp - yyss + 1;
1242
1243 #ifdef yyoverflow
1244 {
1245 /* Give user a chance to reallocate the stack. Use copies of
1246 these so that the &'s don't force the real ones into
1247 memory. */
1248 YYSTYPE *yyvs1 = yyvs;
1249 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1250 YYLTYPE *yyls1 = yyls;])[
1251
1252 /* Each stack pointer address is followed by the size of the
1253 data in use in that stack, in bytes. This used to be a
1254 conditional around just the two extra args, but that might
1255 be undefined if yyoverflow is a macro. */
1256 yyoverflow (YY_("memory exhausted"),
1257 &yyss1, yysize * sizeof (*yyssp),
1258 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1259 &yyls1, yysize * sizeof (*yylsp),])[
1260 &yystacksize);
1261 ]b4_locations_if([
1262 yyls = yyls1;])[
1263 yyss = yyss1;
1264 yyvs = yyvs1;
1265 }
1266 #else /* no yyoverflow */
1267 # ifndef YYSTACK_RELOCATE
1268 goto yyexhaustedlab;
1269 # else
1270 /* Extend the stack our own way. */
1271 if (YYMAXDEPTH <= yystacksize)
1272 goto yyexhaustedlab;
1273 yystacksize *= 2;
1274 if (YYMAXDEPTH < yystacksize)
1275 yystacksize = YYMAXDEPTH;
1276
1277 {
1278 yytype_int16 *yyss1 = yyss;
1279 union yyalloc *yyptr =
1280 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1281 if (! yyptr)
1282 goto yyexhaustedlab;
1283 YYSTACK_RELOCATE (yyss_alloc, yyss);
1284 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1285 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1286 # undef YYSTACK_RELOCATE
1287 if (yyss1 != yyssa)
1288 YYSTACK_FREE (yyss1);
1289 }
1290 # endif
1291 #endif /* no yyoverflow */
1292
1293 yyssp = yyss + yysize - 1;
1294 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1295 yylsp = yyls + yysize - 1;])[
1296
1297 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1298 (unsigned long int) yystacksize));
1299
1300 if (yyss + yystacksize - 1 <= yyssp)
1301 YYABORT;
1302 }
1303
1304 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1305
1306 if (yystate == YYFINAL)
1307 YYACCEPT;
1308
1309 goto yybackup;
1310
1311 /*-----------.
1312 | yybackup. |
1313 `-----------*/
1314 yybackup:
1315
1316 /* Do appropriate processing given the current state. Read a
1317 lookahead token if we need one and don't already have one. */
1318
1319 /* First try to decide what to do without reference to lookahead token. */
1320 yyn = yypact[yystate];
1321 if (yypact_value_is_default (yyn))
1322 goto yydefault;
1323
1324 /* Not known => get a lookahead token if don't already have one. */
1325
1326 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1327 if (yychar == YYEMPTY)
1328 {]b4_push_if([[
1329 if (!yyps->yynew)
1330 {]b4_use_push_for_pull_if([], [[
1331 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1332 yyresult = YYPUSH_MORE;
1333 goto yypushreturn;
1334 }
1335 yyps->yynew = 0;]b4_pure_if([], [[
1336 /* Restoring the pushed token is only necessary for the first
1337 yypush_parse invocation since subsequent invocations don't overwrite
1338 it before jumping to yyread_pushed_token. */
1339 yychar = yypushed_char;
1340 yylval = yypushed_val;]b4_locations_if([[
1341 yylloc = yypushed_loc;]])])[
1342 yyread_pushed_token:]])[
1343 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1344 yychar = yypushed_char;
1345 if (yypushed_val)
1346 yylval = *yypushed_val;]b4_locations_if([[
1347 if (yypushed_loc)
1348 yylloc = *yypushed_loc;]])])], [[
1349 yychar = YYLEX;]])[
1350 }
1351
1352 if (yychar <= YYEOF)
1353 {
1354 yychar = yytoken = YYEOF;
1355 YYDPRINTF ((stderr, "Now at end of input.\n"));
1356 }
1357 else
1358 {
1359 yytoken = YYTRANSLATE (yychar);
1360 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1361 }
1362
1363 /* If the proper action on seeing token YYTOKEN is to reduce or to
1364 detect an error, take that action. */
1365 yyn += yytoken;
1366 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1367 goto yydefault;
1368 yyn = yytable[yyn];
1369 if (yyn <= 0)
1370 {
1371 if (yytable_value_is_error (yyn))
1372 goto yyerrlab;
1373 yyn = -yyn;
1374 goto yyreduce;
1375 }
1376
1377 /* Count tokens shifted since error; after three, turn off error
1378 status. */
1379 if (yyerrstatus)
1380 yyerrstatus--;
1381
1382 /* Shift the lookahead token. */
1383 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1384
1385 /* Discard the shifted token. */
1386 yychar = YYEMPTY;
1387
1388 yystate = yyn;
1389 *++yyvsp = yylval;
1390 ]b4_locations_if([ *++yylsp = yylloc;])[
1391 goto yynewstate;
1392
1393
1394 /*-----------------------------------------------------------.
1395 | yydefault -- do the default action for the current state. |
1396 `-----------------------------------------------------------*/
1397 yydefault:
1398 yyn = yydefact[yystate];
1399 if (yyn == 0)
1400 goto yyerrlab;
1401 goto yyreduce;
1402
1403
1404 /*-----------------------------.
1405 | yyreduce -- Do a reduction. |
1406 `-----------------------------*/
1407 yyreduce:
1408 /* yyn is the number of a rule to reduce with. */
1409 yylen = yyr2[yyn];
1410
1411 /* If YYLEN is nonzero, implement the default value of the action:
1412 `$$ = $1'.
1413
1414 Otherwise, the following line sets YYVAL to garbage.
1415 This behavior is undocumented and Bison
1416 users should not rely upon it. Assigning to YYVAL
1417 unconditionally makes the parser a bit smaller, and it avoids a
1418 GCC warning that YYVAL may be used uninitialized. */
1419 yyval = yyvsp[1-yylen];
1420
1421 ]b4_locations_if(
1422 [[ /* Default location. */
1423 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1424 YY_REDUCE_PRINT (yyn);
1425 switch (yyn)
1426 {
1427 ]b4_user_actions[
1428 default: break;
1429 }
1430 /* User semantic actions sometimes alter yychar, and that requires
1431 that yytoken be updated with the new translation. We take the
1432 approach of translating immediately before every use of yytoken.
1433 One alternative is translating here after every semantic action,
1434 but that translation would be missed if the semantic action invokes
1435 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1436 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
1437 incorrect destructor might then be invoked immediately. In the
1438 case of YYERROR or YYBACKUP, subsequent parser actions might lead
1439 to an incorrect destructor call or verbose syntax error message
1440 before the lookahead is translated. */
1441 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1442
1443 YYPOPSTACK (yylen);
1444 yylen = 0;
1445 YY_STACK_PRINT (yyss, yyssp);
1446
1447 *++yyvsp = yyval;]b4_locations_if([
1448 *++yylsp = yyloc;])[
1449
1450 /* Now `shift' the result of the reduction. Determine what state
1451 that goes to, based on the state we popped back to and the rule
1452 number reduced by. */
1453
1454 yyn = yyr1[yyn];
1455
1456 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1457 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1458 yystate = yytable[yystate];
1459 else
1460 yystate = yydefgoto[yyn - YYNTOKENS];
1461
1462 goto yynewstate;
1463
1464
1465 /*------------------------------------.
1466 | yyerrlab -- here on detecting error |
1467 `------------------------------------*/
1468 yyerrlab:
1469 /* Make sure we have latest lookahead translation. See comments at
1470 user semantic actions for why this is necessary. */
1471 yytoken = YYTRANSLATE (yychar);
1472
1473 /* If not already recovering from an error, report this error. */
1474 if (!yyerrstatus)
1475 {
1476 ++yynerrs;
1477 #if ! YYERROR_VERBOSE
1478 yyerror (]b4_yyerror_args[YY_("syntax error"));
1479 #else
1480 while (1)
1481 {
1482 int yysyntax_error_status =
1483 yysyntax_error (&yymsg_alloc, &yymsg, yystate, yytoken);
1484 if (yysyntax_error_status == 2 && 0 < yymsg_alloc)
1485 {
1486 if (yymsg != yymsgbuf)
1487 YYSTACK_FREE (yymsg);
1488 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1489 if (yymsg)
1490 continue;
1491 yymsg = yymsgbuf;
1492 yymsg_alloc = sizeof yymsgbuf;
1493 }
1494 if (yysyntax_error_status == 0)
1495 yyerror (]b4_yyerror_args[yymsg);
1496 else
1497 yyerror (]b4_yyerror_args[YY_("syntax error"));
1498 if (yysyntax_error_status == 2)
1499 goto yyexhaustedlab;
1500 break;
1501 }
1502 #endif
1503 }
1504
1505 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
1506
1507 if (yyerrstatus == 3)
1508 {
1509 /* If just tried and failed to reuse lookahead token after an
1510 error, discard it. */
1511
1512 if (yychar <= YYEOF)
1513 {
1514 /* Return failure if at end of input. */
1515 if (yychar == YYEOF)
1516 YYABORT;
1517 }
1518 else
1519 {
1520 yydestruct ("Error: discarding",
1521 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1522 yychar = YYEMPTY;
1523 }
1524 }
1525
1526 /* Else will try to reuse lookahead token after shifting the error
1527 token. */
1528 goto yyerrlab1;
1529
1530
1531 /*---------------------------------------------------.
1532 | yyerrorlab -- error raised explicitly by YYERROR. |
1533 `---------------------------------------------------*/
1534 yyerrorlab:
1535
1536 /* Pacify compilers like GCC when the user code never invokes
1537 YYERROR and the label yyerrorlab therefore never appears in user
1538 code. */
1539 if (/*CONSTCOND*/ 0)
1540 goto yyerrorlab;
1541
1542 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
1543 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1544 this YYERROR. */
1545 YYPOPSTACK (yylen);
1546 yylen = 0;
1547 YY_STACK_PRINT (yyss, yyssp);
1548 yystate = *yyssp;
1549 goto yyerrlab1;
1550
1551
1552 /*-------------------------------------------------------------.
1553 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1554 `-------------------------------------------------------------*/
1555 yyerrlab1:
1556 yyerrstatus = 3; /* Each real token shifted decrements this. */
1557
1558 for (;;)
1559 {
1560 yyn = yypact[yystate];
1561 if (!yypact_value_is_default (yyn))
1562 {
1563 yyn += YYTERROR;
1564 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1565 {
1566 yyn = yytable[yyn];
1567 if (0 < yyn)
1568 break;
1569 }
1570 }
1571
1572 /* Pop the current state because it cannot handle the error token. */
1573 if (yyssp == yyss)
1574 YYABORT;
1575
1576 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
1577 yydestruct ("Error: popping",
1578 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1579 YYPOPSTACK (1);
1580 yystate = *yyssp;
1581 YY_STACK_PRINT (yyss, yyssp);
1582 }
1583
1584 *++yyvsp = yylval;
1585 ]b4_locations_if([[
1586 yyerror_range[2] = yylloc;
1587 /* Using YYLLOC is tempting, but would change the location of
1588 the lookahead. YYLOC is available though. */
1589 YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1590 *++yylsp = yyloc;]])[
1591
1592 /* Shift the error token. */
1593 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1594
1595 yystate = yyn;
1596 goto yynewstate;
1597
1598
1599 /*-------------------------------------.
1600 | yyacceptlab -- YYACCEPT comes here. |
1601 `-------------------------------------*/
1602 yyacceptlab:
1603 yyresult = 0;
1604 goto yyreturn;
1605
1606 /*-----------------------------------.
1607 | yyabortlab -- YYABORT comes here. |
1608 `-----------------------------------*/
1609 yyabortlab:
1610 yyresult = 1;
1611 goto yyreturn;
1612
1613 #if !defined(yyoverflow) || YYERROR_VERBOSE
1614 /*-------------------------------------------------.
1615 | yyexhaustedlab -- memory exhaustion comes here. |
1616 `-------------------------------------------------*/
1617 yyexhaustedlab:
1618 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1619 yyresult = 2;
1620 /* Fall through. */
1621 #endif
1622
1623 yyreturn:
1624 if (yychar != YYEMPTY)
1625 {
1626 /* Make sure we have latest lookahead translation. See comments at
1627 user semantic actions for why this is necessary. */
1628 yytoken = YYTRANSLATE (yychar);
1629 yydestruct ("Cleanup: discarding lookahead",
1630 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1631 }
1632 /* Do not reclaim the symbols of the rule which action triggered
1633 this YYABORT or YYACCEPT. */
1634 YYPOPSTACK (yylen);
1635 YY_STACK_PRINT (yyss, yyssp);
1636 while (yyssp != yyss)
1637 {
1638 yydestruct ("Cleanup: popping",
1639 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1640 YYPOPSTACK (1);
1641 }
1642 #ifndef yyoverflow
1643 if (yyss != yyssa)
1644 YYSTACK_FREE (yyss);
1645 #endif]b4_push_if([[
1646 yyps->yynew = 1;
1647
1648 yypushreturn:]])[
1649 #if YYERROR_VERBOSE
1650 if (yymsg != yymsgbuf)
1651 YYSTACK_FREE (yymsg);
1652 #endif
1653 /* Make sure YYID is used. */
1654 return YYID (yyresult);
1655 }
1656
1657 ]b4_epilogue[]dnl
1658 b4_defines_if(
1659 [@output(b4_spec_defines_file@)@
1660 b4_copyright([Interface for Bison's Yacc-like parsers in C])dnl
1661
1662 b4_percent_code_get([[requires]])[]dnl
1663
1664 b4_token_enums_defines(b4_tokens)
1665
1666 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1667 ]m4_ifdef([b4_stype],
1668 [[typedef union ]b4_union_name[
1669 {
1670 ]b4_user_stype[
1671 } YYSTYPE;
1672 # define YYSTYPE_IS_TRIVIAL 1]],
1673 [m4_if(b4_tag_seen_flag, 0,
1674 [[typedef int YYSTYPE;
1675 # define YYSTYPE_IS_TRIVIAL 1]])])[
1676 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1677 # define YYSTYPE_IS_DECLARED 1
1678 #endif
1679
1680 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
1681
1682 b4_locations_if(
1683 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1684 typedef struct YYLTYPE
1685 {
1686 int first_line;
1687 int first_column;
1688 int last_line;
1689 int last_column;
1690 } YYLTYPE;
1691 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1692 # define YYLTYPE_IS_DECLARED 1
1693 # define YYLTYPE_IS_TRIVIAL 1
1694 #endif
1695
1696 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
1697 )dnl b4_locations_if
1698 b4_push_if([[
1699 #ifndef YYPUSH_DECLS
1700 # define YYPUSH_DECLS
1701 struct ]b4_prefix[pstate;
1702 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1703 enum { YYPUSH_MORE = 4 };
1704 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
1705 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
1706 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
1707 [[[int yypushed_char]], [[yypushed_char]]],
1708 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1709 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1710 b4_parse_param]))
1711 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
1712 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1713 b4_parse_param]))])
1714 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
1715 [[[void]], []])
1716 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
1717 [[b4_prefix[pstate *yyps]], [[yyps]]])[
1718 #endif
1719 ]])
1720 b4_percent_code_get([[provides]])[]dnl
1721 ])dnl b4_defines_if
1722 m4_divert_pop(0)
1723 m4_popdef([b4_copyright_years])
bison