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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, 2006,
5 # 2007, 2008, 2009 Free Software Foundation, Inc.
6
7 m4_pushdef([b4_copyright_years],
8 [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
9 2007, 2008, 2009])
10
11 # This program is free software: you can redistribute it and/or modify
12 # it under the terms of the GNU General Public License as published by
13 # the Free Software Foundation, either version 3 of the License, or
14 # (at your option) any later version.
15 #
16 # This program is distributed in the hope that it will be useful,
17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 # GNU General Public License for more details.
20 #
21 # You should have received a copy of the GNU General Public License
22 # along with this program. If not, see <http://www.gnu.org/licenses/>.
23
24 # Check the value of %define api.push-pull.
25 b4_percent_define_default([[api.push-pull]], [[pull]])
26 b4_percent_define_check_values([[[[api.push-pull]],
27 [[pull]], [[push]], [[both]]]])
28 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
29 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
30 m4_case(b4_percent_define_get([[api.push-pull]]),
31 [pull], [m4_define([b4_push_flag], [[0]])],
32 [push], [m4_define([b4_pull_flag], [[0]])])
33
34 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
35 # tests function as written, don't let BISON_USE_PUSH_FOR_PULL modify Bison's
36 # behavior at all when push parsing is already requested.
37 b4_define_flag_if([use_push_for_pull])
38 b4_use_push_for_pull_if([
39 b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
40 [m4_define([b4_push_flag], [[1]])])])
41
42 m4_include(b4_pkgdatadir/[c.m4])
43
44 ## ---------------- ##
45 ## Default values. ##
46 ## ---------------- ##
47
48 # Stack parameters.
49 m4_define_default([b4_stack_depth_max], [10000])
50 m4_define_default([b4_stack_depth_init], [200])
51
52
53 ## ------------------------ ##
54 ## Pure/impure interfaces. ##
55 ## ------------------------ ##
56
57 b4_percent_define_default([[api.pure]], [[false]])
58 b4_define_flag_if([pure])
59 m4_define([b4_pure_flag],
60 [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])
61
62 # b4_yacc_pure_if(IF-TRUE, IF-FALSE)
63 # ----------------------------------
64 # Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise.
65 m4_define([b4_yacc_pure_if],
66 [b4_pure_if([m4_ifset([b4_parse_param],
67 [$1], [$2])],
68 [$2])])
69
70
71 # b4_yyerror_args
72 # ---------------
73 # Arguments passed to yyerror: user args plus yylloc.
74 m4_define([b4_yyerror_args],
75 [b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl
76 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])])
77
78
79 # b4_lex_param
80 # ------------
81 # Accumulate in b4_lex_param all the yylex arguments.
82 # b4_lex_param arrives quoted twice, but we want to keep only one level.
83 m4_define([b4_lex_param],
84 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl
85 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl
86 m4_ifdef([b4_lex_param], b4_lex_param)))
87
88
89 ## ------------ ##
90 ## Data Types. ##
91 ## ------------ ##
92
93 # b4_int_type(MIN, MAX)
94 # ---------------------
95 # Return the smallest int type able to handle numbers ranging from
96 # MIN to MAX (included). Overwrite the version from c.m4, which
97 # uses only C89 types, so that the user can override the shorter
98 # types, and so that pre-C89 compilers are handled correctly.
99 m4_define([b4_int_type],
100 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
101 b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
102
103 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
104 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
105
106 m4_eval([0 <= $1]), [1], [unsigned int],
107
108 [int])])
109
110
111 ## ----------------- ##
112 ## Semantic Values. ##
113 ## ----------------- ##
114
115
116 # b4_lhs_value([TYPE])
117 # --------------------
118 # Expansion of $<TYPE>$.
119 m4_define([b4_lhs_value],
120 [b4_symbol_value(yyval, [$1])])
121
122
123 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
124 # --------------------------------------
125 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
126 # symbols on RHS.
127 m4_define([b4_rhs_value],
128 [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
129
130
131
132 ## ----------- ##
133 ## Locations. ##
134 ## ----------- ##
135
136 # b4_lhs_location()
137 # -----------------
138 # Expansion of @$.
139 m4_define([b4_lhs_location],
140 [(yyloc)])
141
142
143 # b4_rhs_location(RULE-LENGTH, NUM)
144 # ---------------------------------
145 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
146 # on RHS.
147 m4_define([b4_rhs_location],
148 [(yylsp@{b4_subtract([$2], [$1])@})])
149
150
151 ## ------------------ ##
152 ## Parser variables. ##
153 ## ------------------ ##
154
155 # b4_declare_scanner_communication_variables
156 # ------------------------------------------
157 # Declare the variables that are global, or local to YYPARSE if
158 # pure-parser.
159 m4_define([b4_declare_scanner_communication_variables], [[
160 /* The lookahead symbol. */
161 int yychar;
162
163 /* The semantic value of the lookahead symbol. */
164 YYSTYPE yylval;]b4_locations_if([[
165
166 /* Location data for the lookahead symbol. */
167 YYLTYPE yylloc;]])b4_pure_if([], [[
168
169 /* Number of syntax errors so far. */
170 int yynerrs;]])])
171
172
173 # b4_declare_parser_state_variables
174 # ---------------------------------
175 # Declare all the variables that are needed to maintain the parser state
176 # between calls to yypush_parse.
177 m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
178 /* Number of syntax errors so far. */
179 int yynerrs;
180 ]])[
181 int yystate;
182 /* Number of tokens to shift before error messages enabled. */
183 int yyerrstatus;
184
185 /* The stacks and their tools:
186 `yyss': related to states.
187 `yyvs': related to semantic values.]b4_locations_if([[
188 `yyls': related to locations.]])[
189
190 Refer to the stacks thru separate pointers, to allow yyoverflow
191 to reallocate them elsewhere. */
192
193 /* The state stack. */
194 yytype_int16 yyssa[YYINITDEPTH];
195 yytype_int16 *yyss;
196 yytype_int16 *yyssp;
197
198 /* The semantic value stack. */
199 YYSTYPE yyvsa[YYINITDEPTH];
200 YYSTYPE *yyvs;
201 YYSTYPE *yyvsp;]b4_locations_if([[
202
203 /* The location stack. */
204 YYLTYPE yylsa[YYINITDEPTH];
205 YYLTYPE *yyls;
206 YYLTYPE *yylsp;
207
208 /* The locations where the error started and ended. */
209 YYLTYPE yyerror_range[2];]])[
210
211 YYSIZE_T yystacksize;]])
212
213
214 ## --------------------------------------------------------- ##
215 ## Defining symbol actions, e.g., printers and destructors. ##
216 ## --------------------------------------------------------- ##
217
218 # We do want M4 expansion after # for CPP macros.
219 m4_changecom()
220 m4_divert_push(0)dnl
221 @output(b4_parser_file_name@)@
222 b4_copyright([Implementation for Bison's Yacc-like parsers in C])[
223
224 /* C LALR(1) parser skeleton written by Richard Stallman, by
225 simplifying the original so-called "semantic" parser. */
226
227 /* All symbols defined below should begin with yy or YY, to avoid
228 infringing on user name space. This should be done even for local
229 variables, as they might otherwise be expanded by user macros.
230 There are some unavoidable exceptions within include files to
231 define necessary library symbols; they are noted "INFRINGES ON
232 USER NAME SPACE" below. */
233
234 ]b4_identification
235 b4_percent_code_get([[top]])[]dnl
236 m4_if(b4_prefix, [yy], [],
237 [[/* Substitute the variable and function names. */]b4_pull_if([[
238 #define yyparse ]b4_prefix[parse]])b4_push_if([[
239 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
240 #define yypull_parse ]b4_prefix[pull_parse]])[
241 #define yypstate_new ]b4_prefix[pstate_new
242 #define yypstate_delete ]b4_prefix[pstate_delete
243 #define yypstate ]b4_prefix[pstate]])[
244 #define yylex ]b4_prefix[lex
245 #define yyerror ]b4_prefix[error
246 #define yylval ]b4_prefix[lval
247 #define yychar ]b4_prefix[char
248 #define yydebug ]b4_prefix[debug
249 #define yynerrs ]b4_prefix[nerrs
250 ]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[
251
252 /* Copy the first part of user declarations. */
253 ]b4_user_pre_prologue[
254
255 /* Enabling traces. */
256 #ifndef YYDEBUG
257 # define YYDEBUG ]b4_parse_trace_if([1], [0])[
258 #endif
259
260 /* Enabling verbose error messages. */
261 #ifdef YYERROR_VERBOSE
262 # undef YYERROR_VERBOSE
263 # define YYERROR_VERBOSE 1
264 #else
265 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
266 #endif
267
268 /* Enabling the token table. */
269 #ifndef YYTOKEN_TABLE
270 # define YYTOKEN_TABLE ]b4_token_table[
271 #endif
272
273 ]b4_percent_code_get([[requires]])[]dnl
274
275 b4_token_enums_defines(b4_tokens)[
276
277 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
278 ]m4_ifdef([b4_stype],
279 [[typedef union ]b4_union_name[
280 {
281 ]b4_user_stype[
282 } YYSTYPE;
283 # define YYSTYPE_IS_TRIVIAL 1]],
284 [m4_if(b4_tag_seen_flag, 0,
285 [[typedef int YYSTYPE;
286 # define YYSTYPE_IS_TRIVIAL 1]])])[
287 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
288 # define YYSTYPE_IS_DECLARED 1
289 #endif]b4_locations_if([[
290
291 #if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
292 typedef struct YYLTYPE
293 {
294 int first_line;
295 int first_column;
296 int last_line;
297 int last_column;
298 } YYLTYPE;
299 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
300 # define YYLTYPE_IS_DECLARED 1
301 # define YYLTYPE_IS_TRIVIAL 1
302 #endif]])b4_push_if([[
303
304 #ifndef YYPUSH_DECLS
305 # define YYPUSH_DECLS
306 struct yypstate;
307 typedef struct yypstate yypstate;
308 enum { YYPUSH_MORE = 4 };
309
310 ]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param)
311 ])b4_c_function_decl([[yypush_parse]], [[int]],
312 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
313 [[[int yypushed_char]], [[yypushed_char]]],
314 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
315 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
316 b4_parse_param]))
317 b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]],
318 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
319 b4_parse_param]))])
320 b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []])
321 b4_c_function_decl([[yypstate_delete]], [[void]],
322 [[[yypstate *yyps]], [[yyps]]])[
323 #endif]])
324
325 b4_percent_code_get([[provides]])[]dnl
326
327 [/* Copy the second part of user declarations. */
328 ]b4_user_post_prologue
329 b4_percent_code_get[]dnl
330
331 [#ifdef short
332 # undef short
333 #endif
334
335 #ifdef YYTYPE_UINT8
336 typedef YYTYPE_UINT8 yytype_uint8;
337 #else
338 typedef unsigned char yytype_uint8;
339 #endif
340
341 #ifdef YYTYPE_INT8
342 typedef YYTYPE_INT8 yytype_int8;
343 #elif ]b4_c_modern[
344 typedef signed char yytype_int8;
345 #else
346 typedef short int yytype_int8;
347 #endif
348
349 #ifdef YYTYPE_UINT16
350 typedef YYTYPE_UINT16 yytype_uint16;
351 #else
352 typedef unsigned short int yytype_uint16;
353 #endif
354
355 #ifdef YYTYPE_INT16
356 typedef YYTYPE_INT16 yytype_int16;
357 #else
358 typedef short int yytype_int16;
359 #endif
360
361 #ifndef YYSIZE_T
362 # ifdef __SIZE_TYPE__
363 # define YYSIZE_T __SIZE_TYPE__
364 # elif defined size_t
365 # define YYSIZE_T size_t
366 # elif ! defined YYSIZE_T && ]b4_c_modern[
367 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */
368 # define YYSIZE_T size_t
369 # else
370 # define YYSIZE_T unsigned int
371 # endif
372 #endif
373
374 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
375
376 #ifndef YY_
377 # if defined YYENABLE_NLS && YYENABLE_NLS
378 # if ENABLE_NLS
379 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */
380 # define YY_(msgid) dgettext ("bison-runtime", msgid)
381 # endif
382 # endif
383 # ifndef YY_
384 # define YY_(msgid) msgid
385 # endif
386 #endif
387
388 /* Suppress unused-variable warnings by "using" E. */
389 #if ! defined lint || defined __GNUC__
390 # define YYUSE(e) ((void) (e))
391 #else
392 # define YYUSE(e) /* empty */
393 #endif
394
395 /* Identity function, used to suppress warnings about constant conditions. */
396 #ifndef lint
397 # define YYID(n) (n)
398 #else
399 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[
400 {
401 return yyi;
402 }
403 #endif
404
405 #if ! defined yyoverflow || YYERROR_VERBOSE
406
407 ]b4_push_if([],
408 [[/* The parser invokes alloca or malloc; define the necessary symbols. */
409
410 # ifdef YYSTACK_USE_ALLOCA
411 # if YYSTACK_USE_ALLOCA
412 # ifdef __GNUC__
413 # define YYSTACK_ALLOC __builtin_alloca
414 # elif defined __BUILTIN_VA_ARG_INCR
415 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */
416 # elif defined _AIX
417 # define YYSTACK_ALLOC __alloca
418 # elif defined _MSC_VER
419 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */
420 # define alloca _alloca
421 # else
422 # define YYSTACK_ALLOC alloca
423 # if ! defined _ALLOCA_H && ! defined _STDLIB_H && ]b4_c_modern[
424 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
425 # ifndef _STDLIB_H
426 # define _STDLIB_H 1
427 # endif
428 # endif
429 # endif
430 # endif
431 # endif
432
433 ]])dnl
434 [# ifdef YYSTACK_ALLOC
435 /* Pacify GCC's `empty if-body' warning. */
436 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0))
437 # ifndef YYSTACK_ALLOC_MAXIMUM
438 /* The OS might guarantee only one guard page at the bottom of the stack,
439 and a page size can be as small as 4096 bytes. So we cannot safely
440 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
441 to allow for a few compiler-allocated temporary stack slots. */
442 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
443 # endif
444 # else
445 # define YYSTACK_ALLOC YYMALLOC
446 # define YYSTACK_FREE YYFREE
447 # ifndef YYSTACK_ALLOC_MAXIMUM
448 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
449 # endif
450 # if (defined __cplusplus && ! defined _STDLIB_H \
451 && ! ((defined YYMALLOC || defined malloc) \
452 && (defined YYFREE || defined free)))
453 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
454 # ifndef _STDLIB_H
455 # define _STDLIB_H 1
456 # endif
457 # endif
458 # ifndef YYMALLOC
459 # define YYMALLOC malloc
460 # if ! defined malloc && ! defined _STDLIB_H && ]b4_c_modern[
461 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
462 # endif
463 # endif
464 # ifndef YYFREE
465 # define YYFREE free
466 # if ! defined free && ! defined _STDLIB_H && ]b4_c_modern[
467 void free (void *); /* INFRINGES ON USER NAME SPACE */
468 # endif
469 # endif
470 # endif
471 #endif /* ! defined yyoverflow || YYERROR_VERBOSE */
472
473
474 #if (! defined yyoverflow \
475 && (! defined __cplusplus \
476 || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \
477 && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
478
479 /* A type that is properly aligned for any stack member. */
480 union yyalloc
481 {
482 yytype_int16 yyss_alloc;
483 YYSTYPE yyvs_alloc;]b4_locations_if([
484 YYLTYPE yyls_alloc;])[
485 };
486
487 /* The size of the maximum gap between one aligned stack and the next. */
488 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
489
490 /* The size of an array large to enough to hold all stacks, each with
491 N elements. */
492 ]b4_locations_if(
493 [# define YYSTACK_BYTES(N) \
494 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
495 + 2 * YYSTACK_GAP_MAXIMUM)],
496 [# define YYSTACK_BYTES(N) \
497 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
498 + YYSTACK_GAP_MAXIMUM)])[
499
500 /* Copy COUNT objects from FROM to TO. The source and destination do
501 not overlap. */
502 # ifndef YYCOPY
503 # if defined __GNUC__ && 1 < __GNUC__
504 # define YYCOPY(To, From, Count) \
505 __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
506 # else
507 # define YYCOPY(To, From, Count) \
508 do \
509 { \
510 YYSIZE_T yyi; \
511 for (yyi = 0; yyi < (Count); yyi++) \
512 (To)[yyi] = (From)[yyi]; \
513 } \
514 while (YYID (0))
515 # endif
516 # endif
517
518 /* Relocate STACK from its old location to the new one. The
519 local variables YYSIZE and YYSTACKSIZE give the old and new number of
520 elements in the stack, and YYPTR gives the new location of the
521 stack. Advance YYPTR to a properly aligned location for the next
522 stack. */
523 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \
524 do \
525 { \
526 YYSIZE_T yynewbytes; \
527 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
528 Stack = &yyptr->Stack_alloc; \
529 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
530 yyptr += yynewbytes / sizeof (*yyptr); \
531 } \
532 while (YYID (0))
533
534 #endif
535
536 /* YYFINAL -- State number of the termination state. */
537 #define YYFINAL ]b4_final_state_number[
538 /* YYLAST -- Last index in YYTABLE. */
539 #define YYLAST ]b4_last[
540
541 /* YYNTOKENS -- Number of terminals. */
542 #define YYNTOKENS ]b4_tokens_number[
543 /* YYNNTS -- Number of nonterminals. */
544 #define YYNNTS ]b4_nterms_number[
545 /* YYNRULES -- Number of rules. */
546 #define YYNRULES ]b4_rules_number[
547 /* YYNSTATES -- Number of states. */
548 #define YYNSTATES ]b4_states_number[
549
550 /* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
551 by yylex, with out-of-bounds checking. */
552 #define YYUNDEFTOK ]b4_undef_token_number[
553 #define YYMAXUTOK ]b4_user_token_number_max[
554
555 #define YYTRANSLATE(YYX) \
556 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
557
558 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
559 as returned by yylex, without out-of-bounds checking. */
560 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
561 {
562 ]b4_translate[
563 };
564
565 #if YYDEBUG
566 ]b4_integral_parser_table_define([rline], [b4_rline],
567 [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
568 #endif
569
570 #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
571 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
572 First, the terminals, then, starting at YYNTOKENS, nonterminals. */
573 static const char *const yytname[] =
574 {
575 ]b4_tname[
576 };
577 #endif
578
579 # ifdef YYPRINT
580 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
581 (internal) symbol number NUM (which must be that of a token). */
582 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
583 {
584 ]b4_toknum[
585 };
586 # endif
587
588 #define YYPACT_NINF ]b4_pact_ninf[
589
590 #define yypact_value_is_default(yystate) \
591 ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[
592
593 #define YYTABLE_NINF ]b4_table_ninf[
594
595 #define yytable_value_is_error(yytable_value) \
596 ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[
597
598 ]b4_parser_tables_define[
599
600 #define yyerrok (yyerrstatus = 0)
601 #define yyclearin (yychar = YYEMPTY)
602 #define YYEMPTY (-2)
603 #define YYEOF 0
604
605 #define YYACCEPT goto yyacceptlab
606 #define YYABORT goto yyabortlab
607 #define YYERROR goto yyerrorlab
608
609
610 /* Like YYERROR except do call yyerror. This remains here temporarily
611 to ease the transition to the new meaning of YYERROR, for GCC.
612 Once GCC version 2 has supplanted version 1, this can go. */
613
614 #define YYFAIL goto yyerrlab
615
616 #define YYRECOVERING() (!!yyerrstatus)
617
618 #define YYBACKUP(Token, Value) \
619 do \
620 if (yychar == YYEMPTY && yylen == 1) \
621 { \
622 yychar = (Token); \
623 yylval = (Value); \
624 yytoken = YYTRANSLATE (yychar); \
625 YYPOPSTACK (1); \
626 goto yybackup; \
627 } \
628 else \
629 { \
630 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
631 YYERROR; \
632 } \
633 while (YYID (0))
634
635
636 #define YYTERROR 1
637 #define YYERRCODE 256
638
639
640 /* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
641 If N is 0, then set CURRENT to the empty location which ends
642 the previous symbol: RHS[0] (always defined). */
643
644 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
645 #ifndef YYLLOC_DEFAULT
646 # define YYLLOC_DEFAULT(Current, Rhs, N) \
647 do \
648 if (YYID (N)) \
649 { \
650 (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
651 (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
652 (Current).last_line = YYRHSLOC (Rhs, N).last_line; \
653 (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
654 } \
655 else \
656 { \
657 (Current).first_line = (Current).last_line = \
658 YYRHSLOC (Rhs, 0).last_line; \
659 (Current).first_column = (Current).last_column = \
660 YYRHSLOC (Rhs, 0).last_column; \
661 } \
662 while (YYID (0))
663 #endif
664
665
666 /* YY_LOCATION_PRINT -- Print the location on the stream.
667 This macro was not mandated originally: define only if we know
668 we won't break user code: when these are the locations we know. */
669
670 #ifndef YY_LOCATION_PRINT
671 # if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
672 # define YY_LOCATION_PRINT(File, Loc) \
673 fprintf (File, "%d.%d-%d.%d", \
674 (Loc).first_line, (Loc).first_column, \
675 (Loc).last_line, (Loc).last_column)
676 # else
677 # define YY_LOCATION_PRINT(File, Loc) ((void) 0)
678 # endif
679 #endif
680
681
682 /* YYLEX -- calling `yylex' with the right arguments. */
683
684 #ifdef YYLEX_PARAM
685 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM)
686 #else
687 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[
688 #endif
689
690 /* Enable debugging if requested. */
691 #if YYDEBUG
692
693 # ifndef YYFPRINTF
694 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */
695 # define YYFPRINTF fprintf
696 # endif
697
698 # define YYDPRINTF(Args) \
699 do { \
700 if (yydebug) \
701 YYFPRINTF Args; \
702 } while (YYID (0))
703
704 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
705 do { \
706 if (yydebug) \
707 { \
708 YYFPRINTF (stderr, "%s ", Title); \
709 yy_symbol_print (stderr, \
710 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
711 YYFPRINTF (stderr, "\n"); \
712 } \
713 } while (YYID (0))
714
715 ]b4_yy_symbol_print_generate([b4_c_function_def])[
716
717 /*------------------------------------------------------------------.
718 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
719 | TOP (included). |
720 `------------------------------------------------------------------*/
721
722 ]b4_c_function_def([yy_stack_print], [static void],
723 [[yytype_int16 *yybottom], [yybottom]],
724 [[yytype_int16 *yytop], [yytop]])[
725 {
726 YYFPRINTF (stderr, "Stack now");
727 for (; yybottom <= yytop; yybottom++)
728 {
729 int yybot = *yybottom;
730 YYFPRINTF (stderr, " %d", yybot);
731 }
732 YYFPRINTF (stderr, "\n");
733 }
734
735 # define YY_STACK_PRINT(Bottom, Top) \
736 do { \
737 if (yydebug) \
738 yy_stack_print ((Bottom), (Top)); \
739 } while (YYID (0))
740
741
742 /*------------------------------------------------.
743 | Report that the YYRULE is going to be reduced. |
744 `------------------------------------------------*/
745
746 ]b4_c_function_def([yy_reduce_print], [static void],
747 [[yytype_int16 *yyssp], [yyssp]],
748 [[YYSTYPE *yyvsp], [yyvsp]],
749 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
750 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
751 b4_parse_param]))[
752 {
753 unsigned long int yylno = yyrline[yyrule];
754 int yynrhs = yyr2[yyrule];
755 int yyi;
756 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
757 yyrule - 1, yylno);
758 /* The symbols being reduced. */
759 for (yyi = 0; yyi < yynrhs; yyi++)
760 {
761 YYFPRINTF (stderr, " $%d = ", yyi + 1);
762 yy_symbol_print (stderr,
763 yystos[yyssp[yyi + 1 - yynrhs]],
764 &]b4_rhs_value(yynrhs, yyi + 1)[
765 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
766 b4_user_args[);
767 YYFPRINTF (stderr, "\n");
768 }
769 }
770
771 # define YY_REDUCE_PRINT(Rule) \
772 do { \
773 if (yydebug) \
774 yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
775 } while (YYID (0))
776
777 /* Nonzero means print parse trace. It is left uninitialized so that
778 multiple parsers can coexist. */
779 int yydebug;
780 #else /* !YYDEBUG */
781 # define YYDPRINTF(Args)
782 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
783 # define YY_STACK_PRINT(Bottom, Top)
784 # define YY_REDUCE_PRINT(Rule)
785 #endif /* !YYDEBUG */
786
787
788 /* YYINITDEPTH -- initial size of the parser's stacks. */
789 #ifndef YYINITDEPTH
790 # define YYINITDEPTH ]b4_stack_depth_init[
791 #endif
792
793 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
794 if the built-in stack extension method is used).
795
796 Do not make this value too large; the results are undefined if
797 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
798 evaluated with infinite-precision integer arithmetic. */
799
800 #ifndef YYMAXDEPTH
801 # define YYMAXDEPTH ]b4_stack_depth_max[
802 #endif
803
804 \f
805
806 #if YYERROR_VERBOSE
807
808 # ifndef yystrlen
809 # if defined __GLIBC__ && defined _STRING_H
810 # define yystrlen strlen
811 # else
812 /* Return the length of YYSTR. */
813 ]b4_c_function_def([yystrlen], [static YYSIZE_T],
814 [[const char *yystr], [yystr]])[
815 {
816 YYSIZE_T yylen;
817 for (yylen = 0; yystr[yylen]; yylen++)
818 continue;
819 return yylen;
820 }
821 # endif
822 # endif
823
824 # ifndef yystpcpy
825 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
826 # define yystpcpy stpcpy
827 # else
828 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
829 YYDEST. */
830 ]b4_c_function_def([yystpcpy], [static char *],
831 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
832 {
833 char *yyd = yydest;
834 const char *yys = yysrc;
835
836 while ((*yyd++ = *yys++) != '\0')
837 continue;
838
839 return yyd - 1;
840 }
841 # endif
842 # endif
843
844 # ifndef yytnamerr
845 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
846 quotes and backslashes, so that it's suitable for yyerror. The
847 heuristic is that double-quoting is unnecessary unless the string
848 contains an apostrophe, a comma, or backslash (other than
849 backslash-backslash). YYSTR is taken from yytname. If YYRES is
850 null, do not copy; instead, return the length of what the result
851 would have been. */
852 static YYSIZE_T
853 yytnamerr (char *yyres, const char *yystr)
854 {
855 if (*yystr == '"')
856 {
857 YYSIZE_T yyn = 0;
858 char const *yyp = yystr;
859
860 for (;;)
861 switch (*++yyp)
862 {
863 case '\'':
864 case ',':
865 goto do_not_strip_quotes;
866
867 case '\\':
868 if (*++yyp != '\\')
869 goto do_not_strip_quotes;
870 /* Fall through. */
871 default:
872 if (yyres)
873 yyres[yyn] = *yyp;
874 yyn++;
875 break;
876
877 case '"':
878 if (yyres)
879 yyres[yyn] = '\0';
880 return yyn;
881 }
882 do_not_strip_quotes: ;
883 }
884
885 if (! yyres)
886 return yystrlen (yystr);
887
888 return yystpcpy (yyres, yystr) - yyres;
889 }
890 # endif
891
892 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
893 about the unexpected token YYTOKEN while in state YYSTATE.
894
895 Return 0 if *YYMSG was successfully written. Return 1 if an ordinary
896 "syntax error" message will suffice instead. Return 2 if *YYMSG is
897 not large enough to hold the message. In the last case, also set
898 *YYMSG_ALLOC to either (a) the required number of bytes or (b) zero
899 if the required number of bytes is too large to store. */
900 static int
901 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
902 int yystate, int yytoken)
903 {
904 int yyn = yypact[yystate];
905
906 if (! (YYPACT_NINF < yyn && yyn <= YYLAST))
907 return 1;
908 else
909 {
910 YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);
911 YYSIZE_T yysize = yysize0;
912 YYSIZE_T yysize1;
913 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
914 /* Internationalized format string. */
915 const char *yyformat = 0;
916 /* Arguments of yyformat. */
917 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
918
919 /* Start YYX at -YYN if negative to avoid negative indexes in
920 YYCHECK. In other words, skip the first -YYN actions for this
921 state because they are default actions. */
922 int yyxbegin = yyn < 0 ? -yyn : 0;
923
924 /* Stay within bounds of both yycheck and yytname. */
925 int yychecklim = YYLAST - yyn + 1;
926 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
927 /* Number of reported tokens (one for the "unexpected", one per
928 "expected"). */
929 int yycount = 0;
930 int yyx;
931
932 yyarg[yycount++] = yytname[yytoken];
933
934 for (yyx = yyxbegin; yyx < yyxend; ++yyx)
935 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
936 && !yytable_value_is_error (yytable[yyx + yyn]))
937 {
938 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
939 {
940 yycount = 1;
941 yysize = yysize0;
942 break;
943 }
944 yyarg[yycount++] = yytname[yyx];
945 yysize1 = yysize + yytnamerr (0, yytname[yyx]);
946 if (! (yysize <= yysize1
947 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
948 {
949 /* Overflow. */
950 *yymsg_alloc = 0;
951 return 2;
952 }
953 yysize = yysize1;
954 }
955
956 switch (yycount)
957 {
958 #define YYCASE_(N, S) \
959 case N: \
960 yyformat = S; \
961 break
962 YYCASE_(1, YY_("syntax error, unexpected %s"));
963 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
964 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
965 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
966 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
967 #undef YYCASE_
968 }
969
970 yysize1 = yysize + yystrlen (yyformat);
971 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
972 {
973 /* Overflow. */
974 *yymsg_alloc = 0;
975 return 2;
976 }
977 yysize = yysize1;
978
979 if (*yymsg_alloc < yysize)
980 {
981 *yymsg_alloc = 2 * yysize;
982 if (! (yysize <= *yymsg_alloc
983 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
984 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
985 return 2;
986 }
987
988 /* Avoid sprintf, as that infringes on the user's name space.
989 Don't have undefined behavior even if the translation
990 produced a string with the wrong number of "%s"s. */
991 {
992 char *yyp = *yymsg;
993 int yyi = 0;
994 while ((*yyp = *yyformat) != '\0')
995 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
996 {
997 yyp += yytnamerr (yyp, yyarg[yyi++]);
998 yyformat += 2;
999 }
1000 else
1001 {
1002 yyp++;
1003 yyformat++;
1004 }
1005 }
1006 return 0;
1007 }
1008 }
1009 #endif /* YYERROR_VERBOSE */
1010 \f
1011
1012 ]b4_yydestruct_generate([b4_c_function_def])b4_push_if([], [[
1013
1014
1015 /* Prevent warnings from -Wmissing-prototypes. */
1016 #ifdef YYPARSE_PARAM
1017 ]b4_c_function_decl([yyparse], [int],
1018 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1019 #else /* ! YYPARSE_PARAM */
1020 ]b4_c_function_decl([yyparse], [int], b4_parse_param)[
1021 #endif /* ! YYPARSE_PARAM */]])b4_pure_if([], [
1022
1023 b4_declare_scanner_communication_variables])[]b4_push_if([[
1024
1025
1026 struct yypstate
1027 {]b4_declare_parser_state_variables[
1028 /* Used to determine if this is the first time this instance has
1029 been used. */
1030 int yynew;
1031 };]b4_pure_if([], [[
1032
1033 static char yypstate_allocated = 0;]])b4_pull_if([
1034
1035 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
1036 {
1037 return yypull_parse (0]m4_ifset([b4_parse_param],
1038 [[, ]b4_c_args(b4_parse_param)])[);
1039 }
1040
1041 ]b4_c_function_def([[yypull_parse]], [[int]],
1042 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1043 b4_parse_param]))[
1044 {
1045 int yystatus;
1046 yypstate *yyps_local;]b4_pure_if([[
1047 int yychar;
1048 YYSTYPE yylval;]b4_locations_if([[
1049 YYLTYPE yylloc;]])])[
1050 if (yyps == 0)
1051 {
1052 yyps_local = yypstate_new ();
1053 if (!yyps_local)
1054 {]b4_pure_if([[
1055 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1056 if (!yypstate_allocated)
1057 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1058 return 2;
1059 }
1060 }
1061 else
1062 yyps_local = yyps;
1063 do {
1064 yychar = YYLEX;
1065 yystatus =
1066 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
1067 } while (yystatus == YYPUSH_MORE);
1068 if (yyps == 0)
1069 yypstate_delete (yyps_local);
1070 return yystatus;
1071 }]])[
1072
1073 /* Initialize the parser data structure. */
1074 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[
1075 {
1076 yypstate *yyps;]b4_pure_if([], [[
1077 if (yypstate_allocated)
1078 return 0;]])[
1079 yyps = (yypstate *) malloc (sizeof *yyps);
1080 if (!yyps)
1081 return 0;
1082 yyps->yynew = 1;]b4_pure_if([], [[
1083 yypstate_allocated = 1;]])[
1084 return yyps;
1085 }
1086
1087 ]b4_c_function_def([[yypstate_delete]], [[void]],
1088 [[[yypstate *yyps]], [[yyps]]])[
1089 {
1090 #ifndef yyoverflow
1091 /* If the stack was reallocated but the parse did not complete, then the
1092 stack still needs to be freed. */
1093 if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1094 YYSTACK_FREE (yyps->yyss);
1095 #endif
1096 free (yyps);]b4_pure_if([], [[
1097 yypstate_allocated = 0;]])[
1098 }
1099 ]b4_pure_if([[
1100 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1101 #define yystate yyps->yystate
1102 #define yyerrstatus yyps->yyerrstatus
1103 #define yyssa yyps->yyssa
1104 #define yyss yyps->yyss
1105 #define yyssp yyps->yyssp
1106 #define yyvsa yyps->yyvsa
1107 #define yyvs yyps->yyvs
1108 #define yyvsp yyps->yyvsp]b4_locations_if([[
1109 #define yylsa yyps->yylsa
1110 #define yyls yyps->yyls
1111 #define yylsp yyps->yylsp
1112 #define yyerror_range yyps->yyerror_range]])[
1113 #define yystacksize yyps->yystacksize
1114
1115
1116 /*---------------.
1117 | yypush_parse. |
1118 `---------------*/
1119
1120 ]b4_c_function_def([[yypush_parse]], [[int]],
1121 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1122 [[[int yypushed_char]], [[yypushed_char]]],
1123 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1124 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1125 b4_parse_param]))], [[
1126
1127
1128 /*----------.
1129 | yyparse. |
1130 `----------*/
1131
1132 #ifdef YYPARSE_PARAM
1133 ]b4_c_function_def([yyparse], [int],
1134 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[
1135 #else /* ! YYPARSE_PARAM */
1136 ]b4_c_function_def([yyparse], [int], b4_parse_param)[
1137 #endif]])[
1138 {]b4_pure_if([b4_declare_scanner_communication_variables
1139 ])b4_push_if([b4_pure_if([], [[
1140 int yypushed_char = yychar;
1141 YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1142 YYLTYPE yypushed_loc = yylloc;]])
1143 ])],
1144 [b4_declare_parser_state_variables
1145 ])[
1146 int yyn;
1147 int yyresult;
1148 /* Lookahead token as an internal (translated) token number. */
1149 int yytoken;
1150 /* The variables used to return semantic value and location from the
1151 action routines. */
1152 YYSTYPE yyval;]b4_locations_if([[
1153 YYLTYPE yyloc;]])[
1154
1155 #if YYERROR_VERBOSE
1156 /* Buffer for error messages, and its allocated size. */
1157 char yymsgbuf[128];
1158 char *yymsg = yymsgbuf;
1159 YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1160 #endif
1161
1162 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1163
1164 /* The number of symbols on the RHS of the reduced rule.
1165 Keep to zero when no symbol should be popped. */
1166 int yylen = 0;]b4_push_if([[
1167
1168 if (!yyps->yynew)
1169 {
1170 yyn = yypact[yystate];
1171 goto yyread_pushed_token;
1172 }]])[
1173
1174 yytoken = 0;
1175 yyss = yyssa;
1176 yyvs = yyvsa;]b4_locations_if([[
1177 yyls = yylsa;]])[
1178 yystacksize = YYINITDEPTH;
1179
1180 YYDPRINTF ((stderr, "Starting parse\n"));
1181
1182 yystate = 0;
1183 yyerrstatus = 0;
1184 yynerrs = 0;
1185 yychar = YYEMPTY; /* Cause a token to be read. */
1186
1187 /* Initialize stack pointers.
1188 Waste one element of value and location stack
1189 so that they stay on the same level as the state stack.
1190 The wasted elements are never initialized. */
1191 yyssp = yyss;
1192 yyvsp = yyvs;]b4_locations_if([[
1193 yylsp = yyls;
1194
1195 #if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
1196 /* Initialize the default location before parsing starts. */
1197 yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[;
1198 yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
1199 #endif]])
1200 m4_ifdef([b4_initial_action],[
1201 m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl
1202 m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl
1203 /* User initialization code. */
1204 b4_user_initial_action
1205 m4_popdef([b4_dollar_dollar])dnl
1206 m4_popdef([b4_at_dollar])])dnl
1207 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
1208 ]])dnl
1209 m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
1210 ]])[
1211 goto yysetstate;
1212
1213 /*------------------------------------------------------------.
1214 | yynewstate -- Push a new state, which is found in yystate. |
1215 `------------------------------------------------------------*/
1216 yynewstate:
1217 /* In all cases, when you get here, the value and location stacks
1218 have just been pushed. So pushing a state here evens the stacks. */
1219 yyssp++;
1220
1221 yysetstate:
1222 *yyssp = yystate;
1223
1224 if (yyss + yystacksize - 1 <= yyssp)
1225 {
1226 /* Get the current used size of the three stacks, in elements. */
1227 YYSIZE_T yysize = yyssp - yyss + 1;
1228
1229 #ifdef yyoverflow
1230 {
1231 /* Give user a chance to reallocate the stack. Use copies of
1232 these so that the &'s don't force the real ones into
1233 memory. */
1234 YYSTYPE *yyvs1 = yyvs;
1235 yytype_int16 *yyss1 = yyss;]b4_locations_if([
1236 YYLTYPE *yyls1 = yyls;])[
1237
1238 /* Each stack pointer address is followed by the size of the
1239 data in use in that stack, in bytes. This used to be a
1240 conditional around just the two extra args, but that might
1241 be undefined if yyoverflow is a macro. */
1242 yyoverflow (YY_("memory exhausted"),
1243 &yyss1, yysize * sizeof (*yyssp),
1244 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1245 &yyls1, yysize * sizeof (*yylsp),])[
1246 &yystacksize);
1247 ]b4_locations_if([
1248 yyls = yyls1;])[
1249 yyss = yyss1;
1250 yyvs = yyvs1;
1251 }
1252 #else /* no yyoverflow */
1253 # ifndef YYSTACK_RELOCATE
1254 goto yyexhaustedlab;
1255 # else
1256 /* Extend the stack our own way. */
1257 if (YYMAXDEPTH <= yystacksize)
1258 goto yyexhaustedlab;
1259 yystacksize *= 2;
1260 if (YYMAXDEPTH < yystacksize)
1261 yystacksize = YYMAXDEPTH;
1262
1263 {
1264 yytype_int16 *yyss1 = yyss;
1265 union yyalloc *yyptr =
1266 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1267 if (! yyptr)
1268 goto yyexhaustedlab;
1269 YYSTACK_RELOCATE (yyss_alloc, yyss);
1270 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1271 YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1272 # undef YYSTACK_RELOCATE
1273 if (yyss1 != yyssa)
1274 YYSTACK_FREE (yyss1);
1275 }
1276 # endif
1277 #endif /* no yyoverflow */
1278
1279 yyssp = yyss + yysize - 1;
1280 yyvsp = yyvs + yysize - 1;]b4_locations_if([
1281 yylsp = yyls + yysize - 1;])[
1282
1283 YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1284 (unsigned long int) yystacksize));
1285
1286 if (yyss + yystacksize - 1 <= yyssp)
1287 YYABORT;
1288 }
1289
1290 YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1291
1292 if (yystate == YYFINAL)
1293 YYACCEPT;
1294
1295 goto yybackup;
1296
1297 /*-----------.
1298 | yybackup. |
1299 `-----------*/
1300 yybackup:
1301
1302 /* Do appropriate processing given the current state. Read a
1303 lookahead token if we need one and don't already have one. */
1304
1305 /* First try to decide what to do without reference to lookahead token. */
1306 yyn = yypact[yystate];
1307 if (yypact_value_is_default (yyn))
1308 goto yydefault;
1309
1310 /* Not known => get a lookahead token if don't already have one. */
1311
1312 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
1313 if (yychar == YYEMPTY)
1314 {]b4_push_if([[
1315 if (!yyps->yynew)
1316 {]b4_use_push_for_pull_if([], [[
1317 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1318 yyresult = YYPUSH_MORE;
1319 goto yypushreturn;
1320 }
1321 yyps->yynew = 0;]b4_pure_if([], [[
1322 /* Restoring the pushed token is only necessary for the first
1323 yypush_parse invocation since subsequent invocations don't overwrite
1324 it before jumping to yyread_pushed_token. */
1325 yychar = yypushed_char;
1326 yylval = yypushed_val;]b4_locations_if([[
1327 yylloc = yypushed_loc;]])])[
1328 yyread_pushed_token:]])[
1329 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1330 yychar = yypushed_char;
1331 if (yypushed_val)
1332 yylval = *yypushed_val;]b4_locations_if([[
1333 if (yypushed_loc)
1334 yylloc = *yypushed_loc;]])])], [[
1335 yychar = YYLEX;]])[
1336 }
1337
1338 if (yychar <= YYEOF)
1339 {
1340 yychar = yytoken = YYEOF;
1341 YYDPRINTF ((stderr, "Now at end of input.\n"));
1342 }
1343 else
1344 {
1345 yytoken = YYTRANSLATE (yychar);
1346 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1347 }
1348
1349 /* If the proper action on seeing token YYTOKEN is to reduce or to
1350 detect an error, take that action. */
1351 yyn += yytoken;
1352 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
1353 goto yydefault;
1354 yyn = yytable[yyn];
1355 if (yyn <= 0)
1356 {
1357 if (yytable_value_is_error (yyn))
1358 goto yyerrlab;
1359 yyn = -yyn;
1360 goto yyreduce;
1361 }
1362
1363 /* Count tokens shifted since error; after three, turn off error
1364 status. */
1365 if (yyerrstatus)
1366 yyerrstatus--;
1367
1368 /* Shift the lookahead token. */
1369 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1370
1371 /* Discard the shifted token. */
1372 yychar = YYEMPTY;
1373
1374 yystate = yyn;
1375 *++yyvsp = yylval;
1376 ]b4_locations_if([ *++yylsp = yylloc;])[
1377 goto yynewstate;
1378
1379
1380 /*-----------------------------------------------------------.
1381 | yydefault -- do the default action for the current state. |
1382 `-----------------------------------------------------------*/
1383 yydefault:
1384 yyn = yydefact[yystate];
1385 if (yyn == 0)
1386 goto yyerrlab;
1387 goto yyreduce;
1388
1389
1390 /*-----------------------------.
1391 | yyreduce -- Do a reduction. |
1392 `-----------------------------*/
1393 yyreduce:
1394 /* yyn is the number of a rule to reduce with. */
1395 yylen = yyr2[yyn];
1396
1397 /* If YYLEN is nonzero, implement the default value of the action:
1398 `$$ = $1'.
1399
1400 Otherwise, the following line sets YYVAL to garbage.
1401 This behavior is undocumented and Bison
1402 users should not rely upon it. Assigning to YYVAL
1403 unconditionally makes the parser a bit smaller, and it avoids a
1404 GCC warning that YYVAL may be used uninitialized. */
1405 yyval = yyvsp[1-yylen];
1406
1407 ]b4_locations_if(
1408 [[ /* Default location. */
1409 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
1410 YY_REDUCE_PRINT (yyn);
1411 switch (yyn)
1412 {
1413 ]b4_user_actions[
1414 default: break;
1415 }
1416 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1417
1418 YYPOPSTACK (yylen);
1419 yylen = 0;
1420 YY_STACK_PRINT (yyss, yyssp);
1421
1422 *++yyvsp = yyval;]b4_locations_if([
1423 *++yylsp = yyloc;])[
1424
1425 /* Now `shift' the result of the reduction. Determine what state
1426 that goes to, based on the state we popped back to and the rule
1427 number reduced by. */
1428
1429 yyn = yyr1[yyn];
1430
1431 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
1432 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
1433 yystate = yytable[yystate];
1434 else
1435 yystate = yydefgoto[yyn - YYNTOKENS];
1436
1437 goto yynewstate;
1438
1439
1440 /*------------------------------------.
1441 | yyerrlab -- here on detecting error |
1442 `------------------------------------*/
1443 yyerrlab:
1444 /* If not already recovering from an error, report this error. */
1445 if (!yyerrstatus)
1446 {
1447 ++yynerrs;
1448 #if ! YYERROR_VERBOSE
1449 yyerror (]b4_yyerror_args[YY_("syntax error"));
1450 #else
1451 while (1)
1452 {
1453 int yysyntax_error_status =
1454 yysyntax_error (&yymsg_alloc, &yymsg, yystate, yytoken);
1455 if (yysyntax_error_status == 2 && 0 < yymsg_alloc)
1456 {
1457 if (yymsg != yymsgbuf)
1458 YYSTACK_FREE (yymsg);
1459 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1460 if (yymsg)
1461 continue;
1462 yymsg = yymsgbuf;
1463 yymsg_alloc = sizeof yymsgbuf;
1464 }
1465 if (yysyntax_error_status == 0)
1466 yyerror (]b4_yyerror_args[yymsg);
1467 else
1468 yyerror (]b4_yyerror_args[YY_("syntax error"));
1469 if (yysyntax_error_status == 2)
1470 goto yyexhaustedlab;
1471 break;
1472 }
1473 #endif
1474 }
1475
1476 ]b4_locations_if([[ yyerror_range[0] = yylloc;]])[
1477
1478 if (yyerrstatus == 3)
1479 {
1480 /* If just tried and failed to reuse lookahead token after an
1481 error, discard it. */
1482
1483 if (yychar <= YYEOF)
1484 {
1485 /* Return failure if at end of input. */
1486 if (yychar == YYEOF)
1487 YYABORT;
1488 }
1489 else
1490 {
1491 yydestruct ("Error: discarding",
1492 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1493 yychar = YYEMPTY;
1494 }
1495 }
1496
1497 /* Else will try to reuse lookahead token after shifting the error
1498 token. */
1499 goto yyerrlab1;
1500
1501
1502 /*---------------------------------------------------.
1503 | yyerrorlab -- error raised explicitly by YYERROR. |
1504 `---------------------------------------------------*/
1505 yyerrorlab:
1506
1507 /* Pacify compilers like GCC when the user code never invokes
1508 YYERROR and the label yyerrorlab therefore never appears in user
1509 code. */
1510 if (/*CONSTCOND*/ 0)
1511 goto yyerrorlab;
1512
1513 ]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen];
1514 ]])[ /* Do not reclaim the symbols of the rule which action triggered
1515 this YYERROR. */
1516 YYPOPSTACK (yylen);
1517 yylen = 0;
1518 YY_STACK_PRINT (yyss, yyssp);
1519 yystate = *yyssp;
1520 goto yyerrlab1;
1521
1522
1523 /*-------------------------------------------------------------.
1524 | yyerrlab1 -- common code for both syntax error and YYERROR. |
1525 `-------------------------------------------------------------*/
1526 yyerrlab1:
1527 yyerrstatus = 3; /* Each real token shifted decrements this. */
1528
1529 for (;;)
1530 {
1531 yyn = yypact[yystate];
1532 if (!yypact_value_is_default (yyn))
1533 {
1534 yyn += YYTERROR;
1535 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1536 {
1537 yyn = yytable[yyn];
1538 if (0 < yyn)
1539 break;
1540 }
1541 }
1542
1543 /* Pop the current state because it cannot handle the error token. */
1544 if (yyssp == yyss)
1545 YYABORT;
1546
1547 ]b4_locations_if([[ yyerror_range[0] = *yylsp;]])[
1548 yydestruct ("Error: popping",
1549 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1550 YYPOPSTACK (1);
1551 yystate = *yyssp;
1552 YY_STACK_PRINT (yyss, yyssp);
1553 }
1554
1555 *++yyvsp = yylval;
1556 ]b4_locations_if([[
1557 yyerror_range[1] = yylloc;
1558 /* Using YYLLOC is tempting, but would change the location of
1559 the lookahead. YYLOC is available though. */
1560 YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
1561 *++yylsp = yyloc;]])[
1562
1563 /* Shift the error token. */
1564 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1565
1566 yystate = yyn;
1567 goto yynewstate;
1568
1569
1570 /*-------------------------------------.
1571 | yyacceptlab -- YYACCEPT comes here. |
1572 `-------------------------------------*/
1573 yyacceptlab:
1574 yyresult = 0;
1575 goto yyreturn;
1576
1577 /*-----------------------------------.
1578 | yyabortlab -- YYABORT comes here. |
1579 `-----------------------------------*/
1580 yyabortlab:
1581 yyresult = 1;
1582 goto yyreturn;
1583
1584 #if !defined(yyoverflow) || YYERROR_VERBOSE
1585 /*-------------------------------------------------.
1586 | yyexhaustedlab -- memory exhaustion comes here. |
1587 `-------------------------------------------------*/
1588 yyexhaustedlab:
1589 yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1590 yyresult = 2;
1591 /* Fall through. */
1592 #endif
1593
1594 yyreturn:
1595 if (yychar != YYEMPTY)
1596 yydestruct ("Cleanup: discarding lookahead",
1597 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1598 /* Do not reclaim the symbols of the rule which action triggered
1599 this YYABORT or YYACCEPT. */
1600 YYPOPSTACK (yylen);
1601 YY_STACK_PRINT (yyss, yyssp);
1602 while (yyssp != yyss)
1603 {
1604 yydestruct ("Cleanup: popping",
1605 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1606 YYPOPSTACK (1);
1607 }
1608 #ifndef yyoverflow
1609 if (yyss != yyssa)
1610 YYSTACK_FREE (yyss);
1611 #endif]b4_push_if([[
1612 yyps->yynew = 1;
1613
1614 yypushreturn:]])[
1615 #if YYERROR_VERBOSE
1616 if (yymsg != yymsgbuf)
1617 YYSTACK_FREE (yymsg);
1618 #endif
1619 /* Make sure YYID is used. */
1620 return YYID (yyresult);
1621 }
1622
1623 ]b4_epilogue[]dnl
1624 b4_defines_if(
1625 [@output(b4_spec_defines_file@)@
1626 b4_copyright([Interface for Bison's Yacc-like parsers in C])dnl
1627
1628 b4_percent_code_get([[requires]])[]dnl
1629
1630 b4_token_enums_defines(b4_tokens)
1631
1632 [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
1633 ]m4_ifdef([b4_stype],
1634 [[typedef union ]b4_union_name[
1635 {
1636 ]b4_user_stype[
1637 } YYSTYPE;
1638 # define YYSTYPE_IS_TRIVIAL 1]],
1639 [m4_if(b4_tag_seen_flag, 0,
1640 [[typedef int YYSTYPE;
1641 # define YYSTYPE_IS_TRIVIAL 1]])])[
1642 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
1643 # define YYSTYPE_IS_DECLARED 1
1644 #endif
1645
1646 ]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]])
1647
1648 b4_locations_if(
1649 [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED
1650 typedef struct YYLTYPE
1651 {
1652 int first_line;
1653 int first_column;
1654 int last_line;
1655 int last_column;
1656 } YYLTYPE;
1657 # define yyltype YYLTYPE /* obsolescent; will be withdrawn */
1658 # define YYLTYPE_IS_DECLARED 1
1659 # define YYLTYPE_IS_TRIVIAL 1
1660 #endif
1661
1662 ]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]])
1663 )dnl b4_locations_if
1664 b4_push_if([[
1665 #ifndef YYPUSH_DECLS
1666 # define YYPUSH_DECLS
1667 struct ]b4_prefix[pstate;
1668 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
1669 enum { YYPUSH_MORE = 4 };
1670 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param)
1671 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]],
1672 [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([,
1673 [[[int yypushed_char]], [[yypushed_char]]],
1674 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1675 [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1676 b4_parse_param]))
1677 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]],
1678 [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1679 b4_parse_param]))])
1680 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
1681 [[[void]], []])
1682 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]],
1683 [[b4_prefix[pstate *yyps]], [[yyps]]])[
1684 #endif
1685 ]])
1686 b4_percent_code_get([[provides]])[]dnl
1687 ])dnl b4_defines_if
1688 m4_divert_pop(0)
1689 m4_popdef([b4_copyright_years])
bison