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1                                                              -*- C -*-
2 # Yacc compatible skeleton for Bison
3 
4 # Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2019 Free Software
5 # Foundation, Inc.
6 
7 m4_pushdef([b4_copyright_years],
8            [1984, 1989-1990, 2000-2015, 2018-2019])
9 
10 # This program is free software: you can redistribute it and/or modify
11 # it under the terms of the GNU General Public License as published by
12 # the Free Software Foundation, either version 3 of the License, or
13 # (at your option) any later version.
14 #
15 # This program is distributed in the hope that it will be useful,
16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 # GNU General Public License for more details.
19 #
20 # You should have received a copy of the GNU General Public License
21 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
22 
23 # Check the value of %define api.push-pull.
24 b4_percent_define_default([[api.push-pull]], [[pull]])
25 b4_percent_define_check_values([[[[api.push-pull]],
26                                  [[pull]], [[push]], [[both]]]])
27 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
28 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
29 m4_case(b4_percent_define_get([[api.push-pull]]),
30         [pull], [m4_define([b4_push_flag], [[0]])],
31         [push], [m4_define([b4_pull_flag], [[0]])])
32 
33 # Handle BISON_USE_PUSH_FOR_PULL for the test suite.  So that push parsing
34 # tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the
35 # behavior of Bison at all when push parsing is already requested.
36 b4_define_flag_if([use_push_for_pull])
37 b4_use_push_for_pull_if([
38   b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
39              [m4_define([b4_push_flag], [[1]])])])
40 
41 # Check the value of %define parse.lac and friends, where LAC stands for
42 # lookahead correction.
43 b4_percent_define_default([[parse.lac]], [[none]])
44 b4_percent_define_default([[parse.lac.es-capacity-initial]], [[20]])
45 b4_percent_define_default([[parse.lac.memory-trace]], [[failures]])
46 b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]],
47                                [[[[parse.lac.memory-trace]],
48                                  [[failures]], [[full]]]])
49 b4_define_flag_if([lac])
50 m4_define([b4_lac_flag],
51           [m4_if(b4_percent_define_get([[parse.lac]]),
52                  [none], [[0]], [[1]])])
53 
54 m4_include(b4_skeletonsdir/[c.m4])
55 
56 ## ---------------- ##
57 ## Default values.  ##
58 ## ---------------- ##
59 
60 # Stack parameters.
61 m4_define_default([b4_stack_depth_max], [10000])
62 m4_define_default([b4_stack_depth_init],  [200])
63 
64 
65 ## ------------------------ ##
66 ## Pure/impure interfaces.  ##
67 ## ------------------------ ##
68 
69 b4_percent_define_default([[api.pure]], [[false]])
70 b4_percent_define_check_values([[[[api.pure]],
71                                  [[false]], [[true]], [[]], [[full]]]])
72 
73 m4_define([b4_pure_flag], [[0]])
74 m4_case(b4_percent_define_get([[api.pure]]),
75         [false], [m4_define([b4_pure_flag], [[0]])],
76         [true],  [m4_define([b4_pure_flag], [[1]])],
77         [],      [m4_define([b4_pure_flag], [[1]])],
78         [full],  [m4_define([b4_pure_flag], [[2]])])
79 
80 m4_define([b4_pure_if],
81 [m4_case(b4_pure_flag,
82          [0], [$2],
83          [1], [$1],
84          [2], [$1])])
85          [m4_fatal([invalid api.pure value: ]$1)])])
86 
87 # b4_yyerror_arg_loc_if(ARG)
88 # --------------------------
89 # Expand ARG iff yyerror is to be given a location as argument.
90 m4_define([b4_yyerror_arg_loc_if],
91 [b4_locations_if([m4_case(b4_pure_flag,
92                           [1], [m4_ifset([b4_parse_param], [$1])],
93                           [2], [$1])])])
94 
95 # b4_yyerror_args
96 # ---------------
97 # Arguments passed to yyerror: user args plus yylloc.
98 m4_define([b4_yyerror_args],
99 [b4_yyerror_arg_loc_if([&yylloc, ])dnl
100 m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
101 
102 
103 
104 ## ------------ ##
105 ## Data Types.  ##
106 ## ------------ ##
107 
108 # b4_int_type(MIN, MAX)
109 # ---------------------
110 # Return the smallest int type able to handle numbers ranging from
111 # MIN to MAX (included).  Overwrite the version from c.m4, which
112 # uses only C89 types, so that the user can override the shorter
113 # types, and so that pre-C89 compilers are handled correctly.
114 m4_define([b4_int_type],
115 [m4_if(b4_ints_in($@,      [0],   [255]), [1], [yytype_uint8],
116        b4_ints_in($@,   [-128],   [127]), [1], [yytype_int8],
117 
118        b4_ints_in($@,      [0], [65535]), [1], [yytype_uint16],
119        b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
120 
121        m4_eval([0 <= $1]),                [1], [unsigned],
122 
123                                                [int])])
124 
125 
126 ## ----------------- ##
127 ## Semantic Values.  ##
128 ## ----------------- ##
129 
130 
131 # b4_lhs_value(SYMBOL-NUM, [TYPE])
132 # --------------------------------
133 # See README.
134 m4_define([b4_lhs_value],
135 [b4_symbol_value(yyval, [$1], [$2])])
136 
137 
138 # b4_rhs_value(RULE-LENGTH, POS, [SYMBOL-NUM], [TYPE])
139 # ----------------------------------------------------
140 # See README.
141 m4_define([b4_rhs_value],
142 [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3], [$4])])
143 
144 
145 ## ----------- ##
146 ## Locations.  ##
147 ## ----------- ##
148 
149 # b4_lhs_location()
150 # -----------------
151 # Expansion of @$.
152 m4_define([b4_lhs_location],
153 [(yyloc)])
154 
155 
156 # b4_rhs_location(RULE-LENGTH, POS)
157 # ---------------------------------
158 # Expansion of @POS, where the current rule has RULE-LENGTH symbols
159 # on RHS.
160 m4_define([b4_rhs_location],
161 [(yylsp@{b4_subtract([$2], [$1])@})])
162 
163 
164 ## -------------- ##
165 ## Declarations.  ##
166 ## -------------- ##
167 
168 # b4_declare_scanner_communication_variables
169 # ------------------------------------------
170 # Declare the variables that are global, or local to YYPARSE if
171 # pure-parser.
172 m4_define([b4_declare_scanner_communication_variables], [[
173 /* The lookahead symbol.  */
174 int yychar;
175 
176 ]b4_pure_if([[
177 /* The semantic value of the lookahead symbol.  */
178 /* Default value used for initialization, for pacifying older GCCs
179    or non-GCC compilers.  */
180 YY_INITIAL_VALUE (static YYSTYPE yyval_default;)
181 YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);]b4_locations_if([[
182 
183 /* Location data for the lookahead symbol.  */
184 static YYLTYPE yyloc_default]b4_yyloc_default[;
185 YYLTYPE yylloc = yyloc_default;]])],
186 [[/* The semantic value of the lookahead symbol.  */
187 YYSTYPE yylval;]b4_locations_if([[
188 /* Location data for the lookahead symbol.  */
189 YYLTYPE yylloc]b4_yyloc_default[;]])[
190 /* Number of syntax errors so far.  */
191 int yynerrs;]])])
192 
193 
194 # b4_declare_parser_state_variables
195 # ---------------------------------
196 # Declare all the variables that are needed to maintain the parser state
197 # between calls to yypush_parse.
198 m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
199     /* Number of syntax errors so far.  */
200     int yynerrs;
201 ]])[
202     int yystate;
203     /* Number of tokens to shift before error messages enabled.  */
204     int yyerrstatus;
205 
206     /* The stacks and their tools:
207        'yyss': related to states.
208        'yyvs': related to semantic values.]b4_locations_if([[
209        'yyls': related to locations.]])[
210 
211        Refer to the stacks through separate pointers, to allow yyoverflow
212        to reallocate them elsewhere.  */
213 
214     /* The state stack.  */
215     yytype_int16 yyssa[YYINITDEPTH];
216     yytype_int16 *yyss;
217     yytype_int16 *yyssp;
218 
219     /* The semantic value stack.  */
220     YYSTYPE yyvsa[YYINITDEPTH];
221     YYSTYPE *yyvs;
222     YYSTYPE *yyvsp;]b4_locations_if([[
223 
224     /* The location stack.  */
225     YYLTYPE yylsa[YYINITDEPTH];
226     YYLTYPE *yyls;
227     YYLTYPE *yylsp;
228 
229     /* The locations where the error started and ended.  */
230     YYLTYPE yyerror_range[3];]])[
231 
232     YYSIZE_T yystacksize;]b4_lac_if([[
233 
234     yytype_int16 yyesa@{]b4_percent_define_get([[parse.lac.es-capacity-initial]])[@};
235     yytype_int16 *yyes;
236     YYSIZE_T yyes_capacity;]])])
237 
238 
239 # _b4_declare_yyparse_push
240 # ------------------------
241 # Declaration of yyparse (and dependencies) when using the push parser
242 # (including in pull mode).
243 m4_define([_b4_declare_yyparse_push],
244 [[#ifndef YYPUSH_MORE_DEFINED
245 # define YYPUSH_MORE_DEFINED
246 enum { YYPUSH_MORE = 4 };
247 #endif
248 
249 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
250 
251 ]b4_pull_if([b4_function_declare([b4_prefix[parse]], [[int]], b4_parse_param)
252 ])b4_function_declare([b4_prefix[push_parse]], [[int]],
253   [[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([,
254   [[[int pushed_char]], [[pushed_char]]],
255   [[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([,
256   [[b4_api_PREFIX[LTYPE *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,
257   b4_parse_param]))
258 b4_pull_if([b4_function_declare([b4_prefix[pull_parse]], [[int]],
259   [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,
260   b4_parse_param]))])
261 b4_function_declare([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
262                     [[[void]], []])
263 b4_function_declare([b4_prefix[pstate_delete]], [[void]],
264                    [[b4_prefix[pstate *ps]], [[ps]]])dnl
265 ])
266 
267 # _b4_declare_yyparse
268 # -------------------
269 # When not the push parser.
270 m4_define([_b4_declare_yyparse],
271 [b4_function_declare(b4_prefix[parse], [int], b4_parse_param)])
272 
273 
274 # b4_declare_yyparse
275 # ------------------
276 m4_define([b4_declare_yyparse],
277 [b4_push_if([_b4_declare_yyparse_push],
278             [_b4_declare_yyparse])[]dnl
279 ])
280 
281 
282 # b4_shared_declarations
283 # ----------------------
284 # Declaration that might either go into the header (if --defines)
285 # or open coded in the parser body.
286 m4_define([b4_shared_declarations],
287 [b4_cpp_guard_open([b4_spec_defines_file])[
288 ]b4_declare_yydebug[
289 ]b4_percent_code_get([[requires]])[
290 ]b4_token_enums_defines[
291 ]b4_declare_yylstype[
292 ]b4_declare_yyparse[
293 ]b4_percent_code_get([[provides]])[
294 ]b4_cpp_guard_close([b4_spec_defines_file])[]dnl
295 ])
296 
297 ## -------------- ##
298 ## Output files.  ##
299 ## -------------- ##
300 
301 b4_output_begin([b4_parser_file_name])[
302 ]b4_copyright([Bison implementation for Yacc-like parsers in C])[
303 /* C LALR(1) parser skeleton written by Richard Stallman, by
304    simplifying the original so-called "semantic" parser.  */
305 
306 /* All symbols defined below should begin with yy or YY, to avoid
307    infringing on user name space.  This should be done even for local
308    variables, as they might otherwise be expanded by user macros.
309    There are some unavoidable exceptions within include files to
310    define necessary library symbols; they are noted "INFRINGES ON
311    USER NAME SPACE" below.  */
312 
313 ]b4_disclaimer[
314 ]b4_identification[
315 ]b4_percent_code_get([[top]])[]dnl
316 m4_if(b4_api_prefix, [yy], [],
317 [[/* Substitute the type names.  */
318 #define YYSTYPE         ]b4_api_PREFIX[STYPE]b4_locations_if([[
319 #define YYLTYPE         ]b4_api_PREFIX[LTYPE]])])[
320 ]m4_if(b4_prefix, [yy], [],
321 [[/* Substitute the variable and function names.  */]b4_pull_if([[
322 #define yyparse         ]b4_prefix[parse]])b4_push_if([[
323 #define yypush_parse    ]b4_prefix[push_parse]b4_pull_if([[
324 #define yypull_parse    ]b4_prefix[pull_parse]])[
325 #define yypstate_new    ]b4_prefix[pstate_new
326 #define yypstate_delete ]b4_prefix[pstate_delete
327 #define yypstate        ]b4_prefix[pstate]])[
328 #define yylex           ]b4_prefix[lex
329 #define yyerror         ]b4_prefix[error
330 #define yydebug         ]b4_prefix[debug
331 #define yynerrs         ]b4_prefix[nerrs
332 ]]b4_pure_if([], [[
333 #define yylval          ]b4_prefix[lval
334 #define yychar          ]b4_prefix[char]b4_locations_if([[
335 #define yylloc          ]b4_prefix[lloc]])]))[
336 
337 ]b4_user_pre_prologue[
338 ]b4_null_define[
339 
340 /* Enabling verbose error messages.  */
341 #ifdef YYERROR_VERBOSE
342 # undef YYERROR_VERBOSE
343 # define YYERROR_VERBOSE 1
344 #else
345 # define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
346 #endif
347 
348 ]m4_ifval(m4_quote(b4_spec_defines_file),
349 [[/* In a future release of Bison, this section will be replaced
350    by #include "@basename(]b4_spec_defines_file[@)".  */
351 ]])dnl
352 b4_shared_declarations[
353 
354 ]b4_user_post_prologue[
355 ]b4_percent_code_get[]dnl
356 
357 [#ifdef short
358 # undef short
359 #endif
360 
361 #ifdef YYTYPE_UINT8
362 typedef YYTYPE_UINT8 yytype_uint8;
363 #else
364 typedef unsigned char yytype_uint8;
365 #endif
366 
367 #ifdef YYTYPE_INT8
368 typedef YYTYPE_INT8 yytype_int8;
369 #else
370 typedef signed char yytype_int8;
371 #endif
372 
373 #ifdef YYTYPE_UINT16
374 typedef YYTYPE_UINT16 yytype_uint16;
375 #else
376 typedef unsigned short yytype_uint16;
377 #endif
378 
379 #ifdef YYTYPE_INT16
380 typedef YYTYPE_INT16 yytype_int16;
381 #else
382 typedef short yytype_int16;
383 #endif
384 
385 #ifndef YYSIZE_T
386 # ifdef __SIZE_TYPE__
387 #  define YYSIZE_T __SIZE_TYPE__
388 # elif defined size_t
389 #  define YYSIZE_T size_t
390 # elif ! defined YYSIZE_T
391 #  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
392 #  define YYSIZE_T size_t
393 # else
394 #  define YYSIZE_T unsigned
395 # endif
396 #endif
397 
398 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
399 
400 #ifndef YY_
401 # if defined YYENABLE_NLS && YYENABLE_NLS
402 #  if ENABLE_NLS
403 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
404 #   define YY_(Msgid) dgettext ("bison-runtime", Msgid)
405 #  endif
406 # endif
407 # ifndef YY_
408 #  define YY_(Msgid) Msgid
409 # endif
410 #endif
411 
412 ]b4_attribute_define[
413 
414 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
415 
416 /* The parser invokes alloca or malloc; define the necessary symbols.  */]dnl
417 b4_push_if([], [b4_lac_if([], [[
418 
419 # ifdef YYSTACK_USE_ALLOCA
420 #  if YYSTACK_USE_ALLOCA
421 #   ifdef __GNUC__
422 #    define YYSTACK_ALLOC __builtin_alloca
423 #   elif defined __BUILTIN_VA_ARG_INCR
424 #    include <alloca.h> /* INFRINGES ON USER NAME SPACE */
425 #   elif defined _AIX
426 #    define YYSTACK_ALLOC __alloca
427 #   elif defined _MSC_VER
428 #    include <malloc.h> /* INFRINGES ON USER NAME SPACE */
429 #    define alloca _alloca
430 #   else
431 #    define YYSTACK_ALLOC alloca
432 #    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
433 #     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
434       /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
435 #     ifndef EXIT_SUCCESS
436 #      define EXIT_SUCCESS 0
437 #     endif
438 #    endif
439 #   endif
440 #  endif
441 # endif]])])[
442 
443 # ifdef YYSTACK_ALLOC
444    /* Pacify GCC's 'empty if-body' warning.  */
445 #  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
446 #  ifndef YYSTACK_ALLOC_MAXIMUM
447     /* The OS might guarantee only one guard page at the bottom of the stack,
448        and a page size can be as small as 4096 bytes.  So we cannot safely
449        invoke alloca (N) if N exceeds 4096.  Use a slightly smaller number
450        to allow for a few compiler-allocated temporary stack slots.  */
451 #   define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
452 #  endif
453 # else
454 #  define YYSTACK_ALLOC YYMALLOC
455 #  define YYSTACK_FREE YYFREE
456 #  ifndef YYSTACK_ALLOC_MAXIMUM
457 #   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
458 #  endif
459 #  if (defined __cplusplus && ! defined EXIT_SUCCESS \
460        && ! ((defined YYMALLOC || defined malloc) \
461              && (defined YYFREE || defined free)))
462 #   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
463 #   ifndef EXIT_SUCCESS
464 #    define EXIT_SUCCESS 0
465 #   endif
466 #  endif
467 #  ifndef YYMALLOC
468 #   define YYMALLOC malloc
469 #   if ! defined malloc && ! defined EXIT_SUCCESS
470 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
471 #   endif
472 #  endif
473 #  ifndef YYFREE
474 #   define YYFREE free
475 #   if ! defined free && ! defined EXIT_SUCCESS
476 void free (void *); /* INFRINGES ON USER NAME SPACE */
477 #   endif
478 #  endif
479 # endif]b4_lac_if([[
480 # define YYCOPY_NEEDED 1]])[
481 #endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[
482 
483 
484 #if (! defined yyoverflow \
485      && (! defined __cplusplus \
486          || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \
487              && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL)))
488 
489 /* A type that is properly aligned for any stack member.  */
490 union yyalloc
491 {
492   yytype_int16 yyss_alloc;
493   YYSTYPE yyvs_alloc;]b4_locations_if([
494   YYLTYPE yyls_alloc;])[
495 };
496 
497 /* The size of the maximum gap between one aligned stack and the next.  */
498 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
499 
500 /* The size of an array large to enough to hold all stacks, each with
501    N elements.  */
502 ]b4_locations_if(
503 [# define YYSTACK_BYTES(N) \
504      ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
505       + 2 * YYSTACK_GAP_MAXIMUM)],
506 [# define YYSTACK_BYTES(N) \
507      ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
508       + YYSTACK_GAP_MAXIMUM)])[
509 
510 # define YYCOPY_NEEDED 1
511 
512 /* Relocate STACK from its old location to the new one.  The
513    local variables YYSIZE and YYSTACKSIZE give the old and new number of
514    elements in the stack, and YYPTR gives the new location of the
515    stack.  Advance YYPTR to a properly aligned location for the next
516    stack.  */
517 # define YYSTACK_RELOCATE(Stack_alloc, Stack)                           \
518     do                                                                  \
519       {                                                                 \
520         YYSIZE_T yynewbytes;                                            \
521         YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
522         Stack = &yyptr->Stack_alloc;                                    \
523         yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
524         yyptr += yynewbytes / sizeof (*yyptr);                          \
525       }                                                                 \
526     while (0)
527 
528 #endif
529 
530 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED
531 /* Copy COUNT objects from SRC to DST.  The source and destination do
532    not overlap.  */
533 # ifndef YYCOPY
534 #  if defined __GNUC__ && 1 < __GNUC__
535 #   define YYCOPY(Dst, Src, Count) \
536       __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
537 #  else
538 #   define YYCOPY(Dst, Src, Count)              \
539       do                                        \
540         {                                       \
541           YYSIZE_T yyi;                         \
542           for (yyi = 0; yyi < (Count); yyi++)   \
543             (Dst)[yyi] = (Src)[yyi];            \
544         }                                       \
545       while (0)
546 #  endif
547 # endif
548 #endif /* !YYCOPY_NEEDED */
549 
550 /* YYFINAL -- State number of the termination state.  */
551 #define YYFINAL  ]b4_final_state_number[
552 /* YYLAST -- Last index in YYTABLE.  */
553 #define YYLAST   ]b4_last[
554 
555 /* YYNTOKENS -- Number of terminals.  */
556 #define YYNTOKENS  ]b4_tokens_number[
557 /* YYNNTS -- Number of nonterminals.  */
558 #define YYNNTS  ]b4_nterms_number[
559 /* YYNRULES -- Number of rules.  */
560 #define YYNRULES  ]b4_rules_number[
561 /* YYNSTATES -- Number of states.  */
562 #define YYNSTATES  ]b4_states_number[
563 
564 #define YYUNDEFTOK  ]b4_undef_token_number[
565 #define YYMAXUTOK   ]b4_user_token_number_max[
566 
567 /* YYTRANSLATE(TOKEN-NUM) -- Symbol number corresponding to TOKEN-NUM
568    as returned by yylex, with out-of-bounds checking.  */
569 #define YYTRANSLATE(YYX)                                                \
570   ((unsigned) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
571 
572 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
573    as returned by yylex.  */
574 static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
575 {
576   ]b4_translate[
577 };
578 
579 #if ]b4_api_PREFIX[DEBUG
580 ]b4_integral_parser_table_define([rline], [b4_rline],
581      [[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[
582 #endif
583 
584 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
585 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
586    First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
587 static const char *const yytname[] =
588 {
589   ]b4_tname[
590 };
591 #endif
592 
593 # ifdef YYPRINT
594 /* YYTOKNUM[NUM] -- (External) token number corresponding to the
595    (internal) symbol number NUM (which must be that of a token).  */
596 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
597 {
598   ]b4_toknum[
599 };
600 # endif
601 
602 #define YYPACT_NINF ]b4_pact_ninf[
603 
604 #define yypact_value_is_default(Yystate) \
605   ]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[
606 
607 #define YYTABLE_NINF ]b4_table_ninf[
608 
609 #define yytable_value_is_error(Yytable_value) \
610   ]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[
611 
612 ]b4_parser_tables_define[
613 
614 #define yyerrok         (yyerrstatus = 0)
615 #define yyclearin       (yychar = YYEMPTY)
616 #define YYEMPTY         (-2)
617 #define YYEOF           0
618 
619 #define YYACCEPT        goto yyacceptlab
620 #define YYABORT         goto yyabortlab
621 #define YYERROR         goto yyerrorlab
622 
623 
624 #define YYRECOVERING()  (!!yyerrstatus)
625 
626 #define YYBACKUP(Token, Value)                                    \
627   do                                                              \
628     if (yychar == YYEMPTY)                                        \
629       {                                                           \
630         yychar = (Token);                                         \
631         yylval = (Value);                                         \
632         YYPOPSTACK (yylen);                                       \
633         yystate = *yyssp;                                         \]b4_lac_if([[
634         YY_LAC_DISCARD ("YYBACKUP");                              \]])[
635         goto yybackup;                                            \
636       }                                                           \
637     else                                                          \
638       {                                                           \
639         yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
640         YYERROR;                                                  \
641       }                                                           \
642   while (0)
643 
644 /* Error token number */
645 #define YYTERROR        1
646 #define YYERRCODE       256
647 
648 ]b4_locations_if([[
649 ]b4_yylloc_default_define[
650 #define YYRHSLOC(Rhs, K) ((Rhs)[K])
651 ]])[
652 
653 /* Enable debugging if requested.  */
654 #if ]b4_api_PREFIX[DEBUG
655 
656 # ifndef YYFPRINTF
657 #  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
658 #  define YYFPRINTF fprintf
659 # endif
660 
661 # define YYDPRINTF(Args)                        \
662 do {                                            \
663   if (yydebug)                                  \
664     YYFPRINTF Args;                             \
665 } while (0)
666 
667 ]b4_yy_location_print_define[
668 
669 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)                    \
670 do {                                                                      \
671   if (yydebug)                                                            \
672     {                                                                     \
673       YYFPRINTF (stderr, "%s ", Title);                                   \
674       yy_symbol_print (stderr,                                            \
675                   Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
676       YYFPRINTF (stderr, "\n");                                           \
677     }                                                                     \
678 } while (0)
679 
680 ]b4_yy_symbol_print_define[
681 
682 /*------------------------------------------------------------------.
683 | yy_stack_print -- Print the state stack from its BOTTOM up to its |
684 | TOP (included).                                                   |
685 `------------------------------------------------------------------*/
686 
687 ]b4_function_define([yy_stack_print], [static void],
688                    [[yytype_int16 *yybottom], [yybottom]],
689                    [[yytype_int16 *yytop],    [yytop]])[
690 {
691   YYFPRINTF (stderr, "Stack now");
692   for (; yybottom <= yytop; yybottom++)
693     {
694       int yybot = *yybottom;
695       YYFPRINTF (stderr, " %d", yybot);
696     }
697   YYFPRINTF (stderr, "\n");
698 }
699 
700 # define YY_STACK_PRINT(Bottom, Top)                            \
701 do {                                                            \
702   if (yydebug)                                                  \
703     yy_stack_print ((Bottom), (Top));                           \
704 } while (0)
705 
706 
707 /*------------------------------------------------.
708 | Report that the YYRULE is going to be reduced.  |
709 `------------------------------------------------*/
710 
711 ]b4_function_define([yy_reduce_print], [static void],
712                    [[yytype_int16 *yyssp], [yyssp]],
713                    [[YYSTYPE *yyvsp], [yyvsp]],
714     b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
715                    ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
716                    b4_parse_param]))[
717 {
718   unsigned long yylno = yyrline[yyrule];
719   int yynrhs = yyr2[yyrule];
720   int yyi;
721   YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
722              yyrule - 1, yylno);
723   /* The symbols being reduced.  */
724   for (yyi = 0; yyi < yynrhs; yyi++)
725     {
726       YYFPRINTF (stderr, "   $%d = ", yyi + 1);
727       yy_symbol_print (stderr,
728                        yystos[yyssp[yyi + 1 - yynrhs]],
729                        &]b4_rhs_value(yynrhs, yyi + 1)[
730                        ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
731                        b4_user_args[);
732       YYFPRINTF (stderr, "\n");
733     }
734 }
735 
736 # define YY_REDUCE_PRINT(Rule)          \
737 do {                                    \
738   if (yydebug)                          \
739     yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
740 } while (0)
741 
742 /* Nonzero means print parse trace.  It is left uninitialized so that
743    multiple parsers can coexist.  */
744 int yydebug;
745 #else /* !]b4_api_PREFIX[DEBUG */
746 # define YYDPRINTF(Args)
747 # define YY_SYMBOL_PRINT(Title, Type, Value, Location)
748 # define YY_STACK_PRINT(Bottom, Top)
749 # define YY_REDUCE_PRINT(Rule)
750 #endif /* !]b4_api_PREFIX[DEBUG */
751 
752 
753 /* YYINITDEPTH -- initial size of the parser's stacks.  */
754 #ifndef YYINITDEPTH
755 # define YYINITDEPTH ]b4_stack_depth_init[
756 #endif
757 
758 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
759    if the built-in stack extension method is used).
760 
761    Do not make this value too large; the results are undefined if
762    YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
763    evaluated with infinite-precision integer arithmetic.  */
764 
765 #ifndef YYMAXDEPTH
766 # define YYMAXDEPTH ]b4_stack_depth_max[
767 #endif]b4_lac_if([[
768 
769 /* Given a state stack such that *YYBOTTOM is its bottom, such that
770    *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty
771    stack, and such that *YYCAPACITY is the maximum number of elements it
772    can hold without a reallocation, make sure there is enough room to
773    store YYADD more elements.  If not, allocate a new stack using
774    YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM,
775    *YYTOP, and *YYCAPACITY to reflect the new capacity and memory
776    location.  If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack
777    using YYSTACK_FREE.  Return 0 if successful or if no reallocation is
778    required.  Return 1 if memory is exhausted.  */
779 static int
780 yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
781 #if ]b4_api_PREFIX[DEBUG
782                       char const *yydebug_prefix,
783                       char const *yydebug_suffix,
784 #endif
785                       yytype_int16 **yybottom,
786                       yytype_int16 *yybottom_no_free,
787                       yytype_int16 **yytop, yytype_int16 *yytop_empty)
788 {
789   YYSIZE_T yysize_old =
790     (YYSIZE_T) (*yytop == yytop_empty ? 0 : *yytop - *yybottom + 1);
791   YYSIZE_T yysize_new = yysize_old + yyadd;
792   if (*yycapacity < yysize_new)
793     {
794       YYSIZE_T yyalloc = 2 * yysize_new;
795       yytype_int16 *yybottom_new;
796       /* Use YYMAXDEPTH for maximum stack size given that the stack
797          should never need to grow larger than the main state stack
798          needs to grow without LAC.  */
799       if (YYMAXDEPTH < yysize_new)
800         {
801           YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix,
802                       yydebug_suffix));
803           return 1;
804         }
805       if (YYMAXDEPTH < yyalloc)
806         yyalloc = YYMAXDEPTH;
807       yybottom_new =
808         (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new);
809       if (!yybottom_new)
810         {
811           YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix,
812                       yydebug_suffix));
813           return 1;
814         }
815       if (*yytop != yytop_empty)
816         {
817           YYCOPY (yybottom_new, *yybottom, yysize_old);
818           *yytop = yybottom_new + (yysize_old - 1);
819         }
820       if (*yybottom != yybottom_no_free)
821         YYSTACK_FREE (*yybottom);
822       *yybottom = yybottom_new;
823       *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]),
824                                    [full], [[
825       YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix,
826                   (unsigned long) yyalloc, yydebug_suffix));]])[
827     }
828   return 0;
829 }
830 
831 /* Establish the initial context for the current lookahead if no initial
832    context is currently established.
833 
834    We define a context as a snapshot of the parser stacks.  We define
835    the initial context for a lookahead as the context in which the
836    parser initially examines that lookahead in order to select a
837    syntactic action.  Thus, if the lookahead eventually proves
838    syntactically unacceptable (possibly in a later context reached via a
839    series of reductions), the initial context can be used to determine
840    the exact set of tokens that would be syntactically acceptable in the
841    lookahead's place.  Moreover, it is the context after which any
842    further semantic actions would be erroneous because they would be
843    determined by a syntactically unacceptable token.
844 
845    YY_LAC_ESTABLISH should be invoked when a reduction is about to be
846    performed in an inconsistent state (which, for the purposes of LAC,
847    includes consistent states that don't know they're consistent because
848    their default reductions have been disabled).  Iff there is a
849    lookahead token, it should also be invoked before reporting a syntax
850    error.  This latter case is for the sake of the debugging output.
851 
852    For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as
853    follows.  If no initial context is currently established for the
854    current lookahead, then check if that lookahead can eventually be
855    shifted if syntactic actions continue from the current context.
856    Report a syntax error if it cannot.  */
857 #define YY_LAC_ESTABLISH                                         \
858 do {                                                             \
859   if (!yy_lac_established)                                       \
860     {                                                            \
861       YYDPRINTF ((stderr,                                        \
862                   "LAC: initial context established for %s\n",   \
863                   yytname[yytoken]));                            \
864       yy_lac_established = 1;                                    \
865       {                                                          \
866         int yy_lac_status =                                      \
867           yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \
868         if (yy_lac_status == 2)                                  \
869           goto yyexhaustedlab;                                   \
870         if (yy_lac_status == 1)                                  \
871           goto yyerrlab;                                         \
872       }                                                          \
873     }                                                            \
874 } while (0)
875 
876 /* Discard any previous initial lookahead context because of Event,
877    which may be a lookahead change or an invalidation of the currently
878    established initial context for the current lookahead.
879 
880    The most common example of a lookahead change is a shift.  An example
881    of both cases is syntax error recovery.  That is, a syntax error
882    occurs when the lookahead is syntactically erroneous for the
883    currently established initial context, so error recovery manipulates
884    the parser stacks to try to find a new initial context in which the
885    current lookahead is syntactically acceptable.  If it fails to find
886    such a context, it discards the lookahead.  */
887 #if ]b4_api_PREFIX[DEBUG
888 # define YY_LAC_DISCARD(Event)                                           \
889 do {                                                                     \
890   if (yy_lac_established)                                                \
891     {                                                                    \
892       if (yydebug)                                                       \
893         YYFPRINTF (stderr, "LAC: initial context discarded due to "      \
894                    Event "\n");                                          \
895       yy_lac_established = 0;                                            \
896     }                                                                    \
897 } while (0)
898 #else
899 # define YY_LAC_DISCARD(Event) yy_lac_established = 0
900 #endif
901 
902 /* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can
903    eventually (after perhaps some reductions) be shifted, return 1 if
904    not, or return 2 if memory is exhausted.  As preconditions and
905    postconditions: *YYES_CAPACITY is the allocated size of the array to
906    which *YYES points, and either *YYES = YYESA or *YYES points to an
907    array allocated with YYSTACK_ALLOC.  yy_lac may overwrite the
908    contents of either array, alter *YYES and *YYES_CAPACITY, and free
909    any old *YYES other than YYESA.  */
910 static int
911 yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
912         YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
913 {
914   yytype_int16 *yyes_prev = yyssp;
915   yytype_int16 *yyesp = yyes_prev;
916   YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken]));
917   if (yytoken == YYUNDEFTOK)
918     {
919       YYDPRINTF ((stderr, " Always Err\n"));
920       return 1;
921     }
922   while (1)
923     {
924       int yyrule = yypact[*yyesp];
925       if (yypact_value_is_default (yyrule)
926           || (yyrule += yytoken) < 0 || YYLAST < yyrule
927           || yycheck[yyrule] != yytoken)
928         {
929           yyrule = yydefact[*yyesp];
930           if (yyrule == 0)
931             {
932               YYDPRINTF ((stderr, " Err\n"));
933               return 1;
934             }
935         }
936       else
937         {
938           yyrule = yytable[yyrule];
939           if (yytable_value_is_error (yyrule))
940             {
941               YYDPRINTF ((stderr, " Err\n"));
942               return 1;
943             }
944           if (0 < yyrule)
945             {
946               YYDPRINTF ((stderr, " S%d\n", yyrule));
947               return 0;
948             }
949           yyrule = -yyrule;
950         }
951       {
952         YYSIZE_T yylen = yyr2[yyrule];
953         YYDPRINTF ((stderr, " R%d", yyrule - 1));
954         if (yyesp != yyes_prev)
955           {
956             YYSIZE_T yysize = (YYSIZE_T) (yyesp - *yyes + 1);
957             if (yylen < yysize)
958               {
959                 yyesp -= yylen;
960                 yylen = 0;
961               }
962             else
963               {
964                 yylen -= yysize;
965                 yyesp = yyes_prev;
966               }
967           }
968         if (yylen)
969           yyesp = yyes_prev -= yylen;
970       }
971       {
972         yytype_int16 yystate;
973         {
974           const int yylhs = yyr1[yyrule] - YYNTOKENS;
975           const int yyi = yypgoto[yylhs] + *yyesp;
976           yystate = ((yytype_int16)
977                      (0 <= yyi && yyi <= YYLAST && yycheck[yyi] == *yyesp
978                       ? yytable[yyi]
979                       : yydefgoto[yylhs]));
980         }
981         if (yyesp == yyes_prev)
982           {
983             yyesp = *yyes;
984             *yyesp = yystate;
985           }
986         else
987           {
988             if (yy_lac_stack_realloc (yyes_capacity, 1,
989 #if ]b4_api_PREFIX[DEBUG
990                                       " (", ")",
991 #endif
992                                       yyes, yyesa, &yyesp, yyes_prev))
993               {
994                 YYDPRINTF ((stderr, "\n"));
995                 return 2;
996               }
997             *++yyesp = yystate;
998           }
999         YYDPRINTF ((stderr, " G%d", (int) yystate));
1000       }
1001     }
1002 }]])[
1003 
1004 
1005 #if YYERROR_VERBOSE
1006 
1007 # ifndef yystrlen
1008 #  if defined __GLIBC__ && defined _STRING_H
1009 #   define yystrlen strlen
1010 #  else
1011 /* Return the length of YYSTR.  */
1012 ]b4_function_define([yystrlen], [static YYSIZE_T],
1013    [[const char *yystr], [yystr]])[
1014 {
1015   YYSIZE_T yylen;
1016   for (yylen = 0; yystr[yylen]; yylen++)
1017     continue;
1018   return yylen;
1019 }
1020 #  endif
1021 # endif
1022 
1023 # ifndef yystpcpy
1024 #  if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
1025 #   define yystpcpy stpcpy
1026 #  else
1027 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
1028    YYDEST.  */
1029 ]b4_function_define([yystpcpy], [static char *],
1030    [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
1031 {
1032   char *yyd = yydest;
1033   const char *yys = yysrc;
1034 
1035   while ((*yyd++ = *yys++) != '\0')
1036     continue;
1037 
1038   return yyd - 1;
1039 }
1040 #  endif
1041 # endif
1042 
1043 # ifndef yytnamerr
1044 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary
1045    quotes and backslashes, so that it's suitable for yyerror.  The
1046    heuristic is that double-quoting is unnecessary unless the string
1047    contains an apostrophe, a comma, or backslash (other than
1048    backslash-backslash).  YYSTR is taken from yytname.  If YYRES is
1049    null, do not copy; instead, return the length of what the result
1050    would have been.  */
1051 static YYSIZE_T
1052 yytnamerr (char *yyres, const char *yystr)
1053 {
1054   if (*yystr == '"')
1055     {
1056       YYSIZE_T yyn = 0;
1057       char const *yyp = yystr;
1058 
1059       for (;;)
1060         switch (*++yyp)
1061           {
1062           case '\'':
1063           case ',':
1064             goto do_not_strip_quotes;
1065 
1066           case '\\':
1067             if (*++yyp != '\\')
1068               goto do_not_strip_quotes;
1069             else
1070               goto append;
1071 
1072           append:
1073           default:
1074             if (yyres)
1075               yyres[yyn] = *yyp;
1076             yyn++;
1077             break;
1078 
1079           case '"':
1080             if (yyres)
1081               yyres[yyn] = '\0';
1082             return yyn;
1083           }
1084     do_not_strip_quotes: ;
1085     }
1086 
1087   if (! yyres)
1088     return yystrlen (yystr);
1089 
1090   return (YYSIZE_T) (yystpcpy (yyres, yystr) - yyres);
1091 }
1092 # endif
1093 
1094 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
1095    about the unexpected token YYTOKEN for the state stack whose top is
1096    YYSSP.]b4_lac_if([[  In order to see if a particular token T is a
1097    valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[
1098 
1099    Return 0 if *YYMSG was successfully written.  Return 1 if *YYMSG is
1100    not large enough to hold the message.  In that case, also set
1101    *YYMSG_ALLOC to the required number of bytes.  Return 2 if the
1102    required number of bytes is too large to store]b4_lac_if([[ or if
1103    yy_lac returned 2]])[.  */
1104 static int
1105 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
1106                 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
1107                 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
1108 {
1109   YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
1110   YYSIZE_T yysize = yysize0;
1111   enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
1112   /* Internationalized format string. */
1113   const char *yyformat = YY_NULLPTR;
1114   /* Arguments of yyformat. */
1115   char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
1116   /* Number of reported tokens (one for the "unexpected", one per
1117      "expected"). */
1118   int yycount = 0;
1119 
1120   /* There are many possibilities here to consider:
1121      - If this state is a consistent state with a default action, then
1122        the only way this function was invoked is if the default action
1123        is an error action.  In that case, don't check for expected
1124        tokens because there are none.
1125      - The only way there can be no lookahead present (in yychar) is if
1126        this state is a consistent state with a default action.  Thus,
1127        detecting the absence of a lookahead is sufficient to determine
1128        that there is no unexpected or expected token to report.  In that
1129        case, just report a simple "syntax error".
1130      - Don't assume there isn't a lookahead just because this state is a
1131        consistent state with a default action.  There might have been a
1132        previous inconsistent state, consistent state with a non-default
1133        action, or user semantic action that manipulated yychar.]b4_lac_if([[
1134        In the first two cases, it might appear that the current syntax
1135        error should have been detected in the previous state when yy_lac
1136        was invoked.  However, at that time, there might have been a
1137        different syntax error that discarded a different initial context
1138        during error recovery, leaving behind the current lookahead.]], [[
1139      - Of course, the expected token list depends on states to have
1140        correct lookahead information, and it depends on the parser not
1141        to perform extra reductions after fetching a lookahead from the
1142        scanner and before detecting a syntax error.  Thus, state merging
1143        (from LALR or IELR) and default reductions corrupt the expected
1144        token list.  However, the list is correct for canonical LR with
1145        one exception: it will still contain any token that will not be
1146        accepted due to an error action in a later state.]])[
1147   */
1148   if (yytoken != YYEMPTY)
1149     {
1150       int yyn = yypact[*yyssp];]b4_lac_if([[
1151       YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[
1152       yyarg[yycount++] = yytname[yytoken];
1153       if (!yypact_value_is_default (yyn))
1154         {]b4_lac_if([], [[
1155           /* Start YYX at -YYN if negative to avoid negative indexes in
1156              YYCHECK.  In other words, skip the first -YYN actions for
1157              this state because they are default actions.  */
1158           int yyxbegin = yyn < 0 ? -yyn : 0;
1159           /* Stay within bounds of both yycheck and yytname.  */
1160           int yychecklim = YYLAST - yyn + 1;
1161           int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[
1162           int yyx;]b4_lac_if([[
1163 
1164           for (yyx = 0; yyx < YYNTOKENS; ++yyx)
1165             if (yyx != YYTERROR && yyx != YYUNDEFTOK)
1166               {
1167                 {
1168                   int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity,
1169                                               yyssp, yyx);
1170                   if (yy_lac_status == 2)
1171                     return 2;
1172                   if (yy_lac_status == 1)
1173                     continue;
1174                 }]], [[
1175 
1176           for (yyx = yyxbegin; yyx < yyxend; ++yyx)
1177             if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
1178                 && !yytable_value_is_error (yytable[yyx + yyn]))
1179               {]])[
1180                 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
1181                   {
1182                     yycount = 1;
1183                     yysize = yysize0;
1184                     break;
1185                   }
1186                 yyarg[yycount++] = yytname[yyx];
1187                 {
1188                   YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
1189                   if (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)
1190                     yysize = yysize1;
1191                   else
1192                     return 2;
1193                 }
1194               }
1195         }]b4_lac_if([[
1196 # if ]b4_api_PREFIX[DEBUG
1197       else if (yydebug)
1198         YYFPRINTF (stderr, "No expected tokens.\n");
1199 # endif]])[
1200     }
1201 
1202   switch (yycount)
1203     {
1204 # define YYCASE_(N, S)                      \
1205       case N:                               \
1206         yyformat = S;                       \
1207       break
1208     default: /* Avoid compiler warnings. */
1209       YYCASE_(0, YY_("syntax error"));
1210       YYCASE_(1, YY_("syntax error, unexpected %s"));
1211       YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
1212       YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
1213       YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
1214       YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
1215 # undef YYCASE_
1216     }
1217 
1218   {
1219     YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
1220     if (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)
1221       yysize = yysize1;
1222     else
1223       return 2;
1224   }
1225 
1226   if (*yymsg_alloc < yysize)
1227     {
1228       *yymsg_alloc = 2 * yysize;
1229       if (! (yysize <= *yymsg_alloc
1230              && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
1231         *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
1232       return 1;
1233     }
1234 
1235   /* Avoid sprintf, as that infringes on the user's name space.
1236      Don't have undefined behavior even if the translation
1237      produced a string with the wrong number of "%s"s.  */
1238   {
1239     char *yyp = *yymsg;
1240     int yyi = 0;
1241     while ((*yyp = *yyformat) != '\0')
1242       if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
1243         {
1244           yyp += yytnamerr (yyp, yyarg[yyi++]);
1245           yyformat += 2;
1246         }
1247       else
1248         {
1249           yyp++;
1250           yyformat++;
1251         }
1252   }
1253   return 0;
1254 }
1255 #endif /* YYERROR_VERBOSE */
1256 
1257 ]b4_yydestruct_define[
1258 
1259 ]b4_pure_if([], [
1260 
1261 b4_declare_scanner_communication_variables])[]b4_push_if([[
1262 
1263 struct yypstate
1264   {]b4_declare_parser_state_variables[
1265     /* Used to determine if this is the first time this instance has
1266        been used.  */
1267     int yynew;
1268   };]b4_pure_if([], [[
1269 
1270 static char yypstate_allocated = 0;]])b4_pull_if([
1271 
1272 b4_function_define([[yyparse]], [[int]], b4_parse_param)[
1273 {
1274   return yypull_parse (YY_NULLPTR]m4_ifset([b4_parse_param],
1275                                   [[, ]b4_args(b4_parse_param)])[);
1276 }
1277 
1278 ]b4_function_define([[yypull_parse]], [[int]],
1279   [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
1280   b4_parse_param]))[
1281 {]b4_pure_if([b4_locations_if([[
1282   static YYLTYPE yyloc_default][]b4_yyloc_default[;
1283   YYLTYPE yylloc = yyloc_default;]])])[
1284   yypstate *yyps_local;
1285   if (yyps)
1286     yyps_local = yyps;
1287   else
1288     {
1289       yyps_local = yypstate_new ();
1290       if (!yyps_local)
1291         {]b4_pure_if([[
1292           yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
1293           if (!yypstate_allocated)
1294             yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
1295           return 2;
1296         }
1297     }
1298   int yystatus;
1299   do {]b4_pure_if([[
1300     YYSTYPE yylval;
1301     int ]])[yychar = ]b4_lex[;
1302     yystatus =
1303       yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[);
1304   } while (yystatus == YYPUSH_MORE);
1305   if (!yyps)
1306     yypstate_delete (yyps_local);
1307   return yystatus;
1308 }]])[
1309 
1310 /* Initialize the parser data structure.  */
1311 ]b4_function_define([[yypstate_new]], [[yypstate *]])[
1312 {
1313   yypstate *yyps;]b4_pure_if([], [[
1314   if (yypstate_allocated)
1315     return YY_NULLPTR;]])[
1316   yyps = (yypstate *) malloc (sizeof *yyps);
1317   if (!yyps)
1318     return YY_NULLPTR;
1319   yyps->yynew = 1;]b4_pure_if([], [[
1320   yypstate_allocated = 1;]])[
1321   return yyps;
1322 }
1323 
1324 ]b4_function_define([[yypstate_delete]], [[void]],
1325                    [[[yypstate *yyps]], [[yyps]]])[
1326 {
1327   if (yyps)
1328     {
1329 #ifndef yyoverflow
1330       /* If the stack was reallocated but the parse did not complete, then the
1331          stack still needs to be freed.  */
1332       if (!yyps->yynew && yyps->yyss != yyps->yyssa)
1333         YYSTACK_FREE (yyps->yyss);
1334 #endif]b4_lac_if([[
1335       if (!yyps->yynew && yyps->yyes != yyps->yyesa)
1336         YYSTACK_FREE (yyps->yyes);]])[
1337       free (yyps);]b4_pure_if([], [[
1338       yypstate_allocated = 0;]])[
1339     }
1340 }
1341 ]b4_pure_if([[
1342 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
1343 #define yystate yyps->yystate
1344 #define yyerrstatus yyps->yyerrstatus
1345 #define yyssa yyps->yyssa
1346 #define yyss yyps->yyss
1347 #define yyssp yyps->yyssp
1348 #define yyvsa yyps->yyvsa
1349 #define yyvs yyps->yyvs
1350 #define yyvsp yyps->yyvsp]b4_locations_if([[
1351 #define yylsa yyps->yylsa
1352 #define yyls yyps->yyls
1353 #define yylsp yyps->yylsp
1354 #define yyerror_range yyps->yyerror_range]])[
1355 #define yystacksize yyps->yystacksize]b4_lac_if([[
1356 #define yyesa yyps->yyesa
1357 #define yyes yyps->yyes
1358 #define yyes_capacity yyps->yyes_capacity]])[
1359 
1360 
1361 /*---------------.
1362 | yypush_parse.  |
1363 `---------------*/
1364 
1365 ]b4_function_define([[yypush_parse]], [[int]],
1366   [[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
1367   [[[int yypushed_char]], [[yypushed_char]]],
1368   [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
1369   [[[YYLTYPE *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
1370   b4_parse_param]))], [[
1371 
1372 
1373 /*----------.
1374 | yyparse.  |
1375 `----------*/
1376 
1377 ]b4_function_define([yyparse], [int], b4_parse_param)])[
1378 {]b4_pure_if([b4_declare_scanner_communication_variables
1379 ])b4_push_if([b4_pure_if([], [[
1380   int yypushed_char = yychar;
1381   YYSTYPE yypushed_val = yylval;]b4_locations_if([[
1382   YYLTYPE yypushed_loc = yylloc;]])
1383 ])],
1384   [b4_declare_parser_state_variables
1385 ])b4_lac_if([[
1386   int yy_lac_established = 0;]])[
1387   int yyn;
1388   int yyresult;
1389   /* Lookahead token as an internal (translated) token number.  */
1390   int yytoken = 0;
1391   /* The variables used to return semantic value and location from the
1392      action routines.  */
1393   YYSTYPE yyval;]b4_locations_if([[
1394   YYLTYPE yyloc;]])[
1395 
1396 #if YYERROR_VERBOSE
1397   /* Buffer for error messages, and its allocated size.  */
1398   char yymsgbuf[128];
1399   char *yymsg = yymsgbuf;
1400   YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
1401 #endif
1402 
1403 #define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
1404 
1405   /* The number of symbols on the RHS of the reduced rule.
1406      Keep to zero when no symbol should be popped.  */
1407   int yylen = 0;]b4_push_if([[
1408 
1409   if (!yyps->yynew)
1410     {
1411       yyn = yypact[yystate];
1412       goto yyread_pushed_token;
1413     }]])[
1414 
1415   yyssp = yyss = yyssa;
1416   yyvsp = yyvs = yyvsa;]b4_locations_if([[
1417   yylsp = yyls = yylsa;]])[
1418   yystacksize = YYINITDEPTH;]b4_lac_if([[
1419 
1420   yyes = yyesa;
1421   yyes_capacity = sizeof yyesa / sizeof *yyes;
1422   if (YYMAXDEPTH < yyes_capacity)
1423     yyes_capacity = YYMAXDEPTH;]])[
1424 
1425   YYDPRINTF ((stderr, "Starting parse\n"));
1426 
1427   yystate = 0;
1428   yyerrstatus = 0;
1429   yynerrs = 0;
1430   yychar = YYEMPTY; /* Cause a token to be read.  */
1431 ]m4_ifdef([b4_initial_action], [
1432 b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [], [],
1433                   [b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl
1434 b4_user_initial_action
1435 b4_dollar_popdef[]dnl
1436 m4_ifdef([b4_dollar_dollar_used],[[  yyvsp[0] = yylval;
1437 ]])])dnl
1438 b4_locations_if([[  yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[;
1439 ]])dnl
1440 [  goto yysetstate;
1441 
1442 
1443 /*------------------------------------------------------------.
1444 | yynewstate -- push a new state, which is found in yystate.  |
1445 `------------------------------------------------------------*/
1446 yynewstate:
1447   /* In all cases, when you get here, the value and location stacks
1448      have just been pushed.  So pushing a state here evens the stacks.  */
1449   yyssp++;
1450 
1451 
1452 /*--------------------------------------------------------------------.
1453 | yynewstate -- set current state (the top of the stack) to yystate.  |
1454 `--------------------------------------------------------------------*/
1455 yysetstate:
1456   *yyssp = (yytype_int16) yystate;
1457 
1458   if (yyss + yystacksize - 1 <= yyssp)
1459 #if !defined yyoverflow && !defined YYSTACK_RELOCATE
1460     goto yyexhaustedlab;
1461 #else
1462     {
1463       /* Get the current used size of the three stacks, in elements.  */
1464       YYSIZE_T yysize = (YYSIZE_T) (yyssp - yyss + 1);
1465 
1466 # if defined yyoverflow
1467       {
1468         /* Give user a chance to reallocate the stack.  Use copies of
1469            these so that the &'s don't force the real ones into
1470            memory.  */
1471         YYSTYPE *yyvs1 = yyvs;
1472         yytype_int16 *yyss1 = yyss;]b4_locations_if([
1473         YYLTYPE *yyls1 = yyls;])[
1474 
1475         /* Each stack pointer address is followed by the size of the
1476            data in use in that stack, in bytes.  This used to be a
1477            conditional around just the two extra args, but that might
1478            be undefined if yyoverflow is a macro.  */
1479         yyoverflow (YY_("memory exhausted"),
1480                     &yyss1, yysize * sizeof (*yyssp),
1481                     &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
1482                     &yyls1, yysize * sizeof (*yylsp),])[
1483                     &yystacksize);
1484         yyss = yyss1;
1485         yyvs = yyvs1;]b4_locations_if([
1486         yyls = yyls1;])[
1487       }
1488 # else /* defined YYSTACK_RELOCATE */
1489       /* Extend the stack our own way.  */
1490       if (YYMAXDEPTH <= yystacksize)
1491         goto yyexhaustedlab;
1492       yystacksize *= 2;
1493       if (YYMAXDEPTH < yystacksize)
1494         yystacksize = YYMAXDEPTH;
1495 
1496       {
1497         yytype_int16 *yyss1 = yyss;
1498         union yyalloc *yyptr =
1499           (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
1500         if (! yyptr)
1501           goto yyexhaustedlab;
1502         YYSTACK_RELOCATE (yyss_alloc, yyss);
1503         YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
1504         YYSTACK_RELOCATE (yyls_alloc, yyls);])[
1505 # undef YYSTACK_RELOCATE
1506         if (yyss1 != yyssa)
1507           YYSTACK_FREE (yyss1);
1508       }
1509 # endif
1510 
1511       yyssp = yyss + yysize - 1;
1512       yyvsp = yyvs + yysize - 1;]b4_locations_if([
1513       yylsp = yyls + yysize - 1;])[
1514 
1515       YYDPRINTF ((stderr, "Stack size increased to %lu\n",
1516                   (unsigned long) yystacksize));
1517 
1518       if (yyss + yystacksize - 1 <= yyssp)
1519         YYABORT;
1520     }
1521 #endif /* !defined yyoverflow && !defined YYSTACK_RELOCATE */
1522 
1523   YYDPRINTF ((stderr, "Entering state %d\n", yystate));
1524 
1525   if (yystate == YYFINAL)
1526     YYACCEPT;
1527 
1528   goto yybackup;
1529 
1530 
1531 /*-----------.
1532 | yybackup.  |
1533 `-----------*/
1534 yybackup:
1535   /* Do appropriate processing given the current state.  Read a
1536      lookahead token if we need one and don't already have one.  */
1537 
1538   /* First try to decide what to do without reference to lookahead token.  */
1539   yyn = yypact[yystate];
1540   if (yypact_value_is_default (yyn))
1541     goto yydefault;
1542 
1543   /* Not known => get a lookahead token if don't already have one.  */
1544 
1545   /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
1546   if (yychar == YYEMPTY)
1547     {]b4_push_if([[
1548       if (!yyps->yynew)
1549         {]b4_use_push_for_pull_if([], [[
1550           YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
1551           yyresult = YYPUSH_MORE;
1552           goto yypushreturn;
1553         }
1554       yyps->yynew = 0;]b4_pure_if([], [[
1555       /* Restoring the pushed token is only necessary for the first
1556          yypush_parse invocation since subsequent invocations don't overwrite
1557          it before jumping to yyread_pushed_token.  */
1558       yychar = yypushed_char;
1559       yylval = yypushed_val;]b4_locations_if([[
1560       yylloc = yypushed_loc;]])])[
1561 yyread_pushed_token:]])[
1562       YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
1563       yychar = yypushed_char;
1564       if (yypushed_val)
1565         yylval = *yypushed_val;]b4_locations_if([[
1566       if (yypushed_loc)
1567         yylloc = *yypushed_loc;]])])], [[
1568       yychar = ]b4_lex[;]])[
1569     }
1570 
1571   if (yychar <= YYEOF)
1572     {
1573       yychar = yytoken = YYEOF;
1574       YYDPRINTF ((stderr, "Now at end of input.\n"));
1575     }
1576   else
1577     {
1578       yytoken = YYTRANSLATE (yychar);
1579       YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
1580     }
1581 
1582   /* If the proper action on seeing token YYTOKEN is to reduce or to
1583      detect an error, take that action.  */
1584   yyn += yytoken;
1585   if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[
1586     {
1587       YY_LAC_ESTABLISH;
1588       goto yydefault;
1589     }]], [[
1590     goto yydefault;]])[
1591   yyn = yytable[yyn];
1592   if (yyn <= 0)
1593     {
1594       if (yytable_value_is_error (yyn))
1595         goto yyerrlab;]b4_lac_if([[
1596       YY_LAC_ESTABLISH;]])[
1597       yyn = -yyn;
1598       goto yyreduce;
1599     }
1600 
1601   /* Count tokens shifted since error; after three, turn off error
1602      status.  */
1603   if (yyerrstatus)
1604     yyerrstatus--;
1605 
1606   /* Shift the lookahead token.  */
1607   YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
1608 
1609   /* Discard the shifted token.  */
1610   yychar = YYEMPTY;]b4_lac_if([[
1611   YY_LAC_DISCARD ("shift");]])[
1612 
1613   yystate = yyn;
1614   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
1615   *++yyvsp = yylval;
1616   YY_IGNORE_MAYBE_UNINITIALIZED_END
1617 ]b4_locations_if([  *++yylsp = yylloc;])[
1618   goto yynewstate;
1619 
1620 
1621 /*-----------------------------------------------------------.
1622 | yydefault -- do the default action for the current state.  |
1623 `-----------------------------------------------------------*/
1624 yydefault:
1625   yyn = yydefact[yystate];
1626   if (yyn == 0)
1627     goto yyerrlab;
1628   goto yyreduce;
1629 
1630 
1631 /*-----------------------------.
1632 | yyreduce -- do a reduction.  |
1633 `-----------------------------*/
1634 yyreduce:
1635   /* yyn is the number of a rule to reduce with.  */
1636   yylen = yyr2[yyn];
1637 
1638   /* If YYLEN is nonzero, implement the default value of the action:
1639      '$$ = $1'.
1640 
1641      Otherwise, the following line sets YYVAL to garbage.
1642      This behavior is undocumented and Bison
1643      users should not rely upon it.  Assigning to YYVAL
1644      unconditionally makes the parser a bit smaller, and it avoids a
1645      GCC warning that YYVAL may be used uninitialized.  */
1646   yyval = yyvsp[1-yylen];
1647 
1648 ]b4_locations_if(
1649 [[  /* Default location. */
1650   YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);
1651   yyerror_range[1] = yyloc;]])[
1652   YY_REDUCE_PRINT (yyn);]b4_lac_if([[
1653   {
1654     int yychar_backup = yychar;
1655     switch (yyn)
1656       {
1657 ]b4_user_actions[
1658         default: break;
1659       }
1660     if (yychar_backup != yychar)
1661       YY_LAC_DISCARD ("yychar change");
1662   }]], [[
1663   switch (yyn)
1664     {
1665       ]b4_user_actions[
1666       default: break;
1667     }]])[
1668   /* User semantic actions sometimes alter yychar, and that requires
1669      that yytoken be updated with the new translation.  We take the
1670      approach of translating immediately before every use of yytoken.
1671      One alternative is translating here after every semantic action,
1672      but that translation would be missed if the semantic action invokes
1673      YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
1674      if it invokes YYBACKUP.  In the case of YYABORT or YYACCEPT, an
1675      incorrect destructor might then be invoked immediately.  In the
1676      case of YYERROR or YYBACKUP, subsequent parser actions might lead
1677      to an incorrect destructor call or verbose syntax error message
1678      before the lookahead is translated.  */
1679   YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
1680 
1681   YYPOPSTACK (yylen);
1682   yylen = 0;
1683   YY_STACK_PRINT (yyss, yyssp);
1684 
1685   *++yyvsp = yyval;]b4_locations_if([
1686   *++yylsp = yyloc;])[
1687 
1688   /* Now 'shift' the result of the reduction.  Determine what state
1689      that goes to, based on the state we popped back to and the rule
1690      number reduced by.  */
1691   {
1692     const int yylhs = yyr1[yyn] - YYNTOKENS;
1693     const int yyi = yypgoto[yylhs] + *yyssp;
1694     yystate = (0 <= yyi && yyi <= YYLAST && yycheck[yyi] == *yyssp
1695                ? yytable[yyi]
1696                : yydefgoto[yylhs]);
1697   }
1698 
1699   goto yynewstate;
1700 
1701 
1702 /*--------------------------------------.
1703 | yyerrlab -- here on detecting error.  |
1704 `--------------------------------------*/
1705 yyerrlab:
1706   /* Make sure we have latest lookahead translation.  See comments at
1707      user semantic actions for why this is necessary.  */
1708   yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
1709 
1710   /* If not already recovering from an error, report this error.  */
1711   if (!yyerrstatus)
1712     {
1713       ++yynerrs;
1714 #if ! YYERROR_VERBOSE
1715       yyerror (]b4_yyerror_args[YY_("syntax error"));
1716 #else
1717 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[
1718                                         yyesa, &yyes, &yyes_capacity, \]])[
1719                                         yyssp, yytoken)
1720       {
1721         char const *yymsgp = YY_("syntax error");
1722         int yysyntax_error_status;]b4_lac_if([[
1723         if (yychar != YYEMPTY)
1724           YY_LAC_ESTABLISH;]])[
1725         yysyntax_error_status = YYSYNTAX_ERROR;
1726         if (yysyntax_error_status == 0)
1727           yymsgp = yymsg;
1728         else if (yysyntax_error_status == 1)
1729           {
1730             if (yymsg != yymsgbuf)
1731               YYSTACK_FREE (yymsg);
1732             yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
1733             if (!yymsg)
1734               {
1735                 yymsg = yymsgbuf;
1736                 yymsg_alloc = sizeof yymsgbuf;
1737                 yysyntax_error_status = 2;
1738               }
1739             else
1740               {
1741                 yysyntax_error_status = YYSYNTAX_ERROR;
1742                 yymsgp = yymsg;
1743               }
1744           }
1745         yyerror (]b4_yyerror_args[yymsgp);
1746         if (yysyntax_error_status == 2)
1747           goto yyexhaustedlab;
1748       }
1749 # undef YYSYNTAX_ERROR
1750 #endif
1751     }
1752 
1753 ]b4_locations_if([[  yyerror_range[1] = yylloc;]])[
1754 
1755   if (yyerrstatus == 3)
1756     {
1757       /* If just tried and failed to reuse lookahead token after an
1758          error, discard it.  */
1759 
1760       if (yychar <= YYEOF)
1761         {
1762           /* Return failure if at end of input.  */
1763           if (yychar == YYEOF)
1764             YYABORT;
1765         }
1766       else
1767         {
1768           yydestruct ("Error: discarding",
1769                       yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1770           yychar = YYEMPTY;
1771         }
1772     }
1773 
1774   /* Else will try to reuse lookahead token after shifting the error
1775      token.  */
1776   goto yyerrlab1;
1777 
1778 
1779 /*---------------------------------------------------.
1780 | yyerrorlab -- error raised explicitly by YYERROR.  |
1781 `---------------------------------------------------*/
1782 yyerrorlab:
1783   /* Pacify compilers when the user code never invokes YYERROR and the
1784      label yyerrorlab therefore never appears in user code.  */
1785   if (0)
1786     YYERROR;
1787 
1788   /* Do not reclaim the symbols of the rule whose action triggered
1789      this YYERROR.  */
1790   YYPOPSTACK (yylen);
1791   yylen = 0;
1792   YY_STACK_PRINT (yyss, yyssp);
1793   yystate = *yyssp;
1794   goto yyerrlab1;
1795 
1796 
1797 /*-------------------------------------------------------------.
1798 | yyerrlab1 -- common code for both syntax error and YYERROR.  |
1799 `-------------------------------------------------------------*/
1800 yyerrlab1:
1801   yyerrstatus = 3;      /* Each real token shifted decrements this.  */
1802 
1803   for (;;)
1804     {
1805       yyn = yypact[yystate];
1806       if (!yypact_value_is_default (yyn))
1807         {
1808           yyn += YYTERROR;
1809           if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
1810             {
1811               yyn = yytable[yyn];
1812               if (0 < yyn)
1813                 break;
1814             }
1815         }
1816 
1817       /* Pop the current state because it cannot handle the error token.  */
1818       if (yyssp == yyss)
1819         YYABORT;
1820 
1821 ]b4_locations_if([[      yyerror_range[1] = *yylsp;]])[
1822       yydestruct ("Error: popping",
1823                   yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1824       YYPOPSTACK (1);
1825       yystate = *yyssp;
1826       YY_STACK_PRINT (yyss, yyssp);
1827     }]b4_lac_if([[
1828 
1829   /* If the stack popping above didn't lose the initial context for the
1830      current lookahead token, the shift below will for sure.  */
1831   YY_LAC_DISCARD ("error recovery");]])[
1832 
1833   YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
1834   *++yyvsp = yylval;
1835   YY_IGNORE_MAYBE_UNINITIALIZED_END
1836 ]b4_locations_if([[
1837   yyerror_range[2] = yylloc;
1838   /* Using YYLLOC is tempting, but would change the location of
1839      the lookahead.  YYLOC is available though.  */
1840   YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
1841   *++yylsp = yyloc;]])[
1842 
1843   /* Shift the error token.  */
1844   YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
1845 
1846   yystate = yyn;
1847   goto yynewstate;
1848 
1849 
1850 /*-------------------------------------.
1851 | yyacceptlab -- YYACCEPT comes here.  |
1852 `-------------------------------------*/
1853 yyacceptlab:
1854   yyresult = 0;
1855   goto yyreturn;
1856 
1857 
1858 /*-----------------------------------.
1859 | yyabortlab -- YYABORT comes here.  |
1860 `-----------------------------------*/
1861 yyabortlab:
1862   yyresult = 1;
1863   goto yyreturn;
1864 
1865 
1866 #if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[
1867 /*-------------------------------------------------.
1868 | yyexhaustedlab -- memory exhaustion comes here.  |
1869 `-------------------------------------------------*/
1870 yyexhaustedlab:
1871   yyerror (]b4_yyerror_args[YY_("memory exhausted"));
1872   yyresult = 2;
1873   /* Fall through.  */
1874 #endif
1875 
1876 
1877 /*-----------------------------------------------------.
1878 | yyreturn -- parsing is finished, return the result.  |
1879 `-----------------------------------------------------*/
1880 yyreturn:
1881   if (yychar != YYEMPTY)
1882     {
1883       /* Make sure we have latest lookahead translation.  See comments at
1884          user semantic actions for why this is necessary.  */
1885       yytoken = YYTRANSLATE (yychar);
1886       yydestruct ("Cleanup: discarding lookahead",
1887                   yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
1888     }
1889   /* Do not reclaim the symbols of the rule whose action triggered
1890      this YYABORT or YYACCEPT.  */
1891   YYPOPSTACK (yylen);
1892   YY_STACK_PRINT (yyss, yyssp);
1893   while (yyssp != yyss)
1894     {
1895       yydestruct ("Cleanup: popping",
1896                   yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
1897       YYPOPSTACK (1);
1898     }
1899 #ifndef yyoverflow
1900   if (yyss != yyssa)
1901     YYSTACK_FREE (yyss);
1902 #endif]b4_lac_if([[
1903   if (yyes != yyesa)
1904     YYSTACK_FREE (yyes);]])b4_push_if([[
1905   yyps->yynew = 1;
1906 
1907 
1908 /*-----------------------------------------.
1909 | yypushreturn -- ask for the next token.  |
1910 `-----------------------------------------*/
1911 yypushreturn:]])[
1912 #if YYERROR_VERBOSE
1913   if (yymsg != yymsgbuf)
1914     YYSTACK_FREE (yymsg);
1915 #endif
1916   return yyresult;
1917 }
1918 ]b4_epilogue[]dnl
1919 b4_output_end
1920 
1921 b4_defines_if([[
1922 ]b4_output_begin([b4_spec_defines_file])[
1923 ]b4_copyright([Bison interface for Yacc-like parsers in C])[
1924 ]b4_disclaimer[
1925 ]b4_shared_declarations[
1926 ]b4_output_end[
1927 ]])# b4_defines_if
1928