1 -*- C -*- 2 3 # Yacc compatible skeleton for Bison 4 5 # Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation, 6 # Inc. 7 8 # This program is free software: you can redistribute it and/or modify 9 # it under the terms of the GNU General Public License as published by 10 # the Free Software Foundation, either version 3 of the License, or 11 # (at your option) any later version. 12 # 13 # This program is distributed in the hope that it will be useful, 14 # but WITHOUT ANY WARRANTY; without even the implied warranty of 15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 # GNU General Public License for more details. 17 # 18 # You should have received a copy of the GNU General Public License 19 # along with this program. If not, see <http://www.gnu.org/licenses/>. 20 21 # Check the value of %define api.push-pull. 22 b4_percent_define_default([[api.push-pull]], [[pull]]) 23 b4_percent_define_check_values([[[[api.push-pull]], 24 [[pull]], [[push]], [[both]]]]) 25 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]]) 26 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]]) 27 m4_case(b4_percent_define_get([[api.push-pull]]), 28 [pull], [m4_define([b4_push_flag], [[0]])], 29 [push], [m4_define([b4_pull_flag], [[0]])]) 30 31 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing 32 # tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the 33 # behavior of Bison at all when push parsing is already requested. 34 b4_define_flag_if([use_push_for_pull]) 35 b4_use_push_for_pull_if([ 36 b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])], 37 [m4_define([b4_push_flag], [[1]])])]) 38 39 # Check the value of %define parse.lac and friends, where LAC stands for 40 # lookahead correction. 41 b4_percent_define_default([[parse.lac]], [[none]]) 42 b4_percent_define_default([[parse.lac.es-capacity-initial]], [[20]]) 43 b4_percent_define_default([[parse.lac.memory-trace]], [[failures]]) 44 b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]], 45 [[[[parse.lac.memory-trace]], 46 [[failures]], [[full]]]]) 47 b4_define_flag_if([lac]) 48 m4_define([b4_lac_flag], 49 [m4_if(b4_percent_define_get([[parse.lac]]), 50 [none], [[0]], [[1]])]) 51 52 m4_include(b4_pkgdatadir/[c.m4]) 53 54 ## ---------------- ## 55 ## Default values. ## 56 ## ---------------- ## 57 58 # Stack parameters. 59 m4_define_default([b4_stack_depth_max], [10000]) 60 m4_define_default([b4_stack_depth_init], [200]) 61 62 63 ## ------------------------ ## 64 ## Pure/impure interfaces. ## 65 ## ------------------------ ## 66 67 b4_percent_define_default([[api.pure]], [[false]]) 68 b4_percent_define_check_values([[[[api.pure]], 69 [[false]], [[true]], [[]], [[full]]]]) 70 71 m4_define([b4_pure_flag], [[0]]) 72 m4_case(b4_percent_define_get([[api.pure]]), 73 [false], [m4_define([b4_pure_flag], [[0]])], 74 [true], [m4_define([b4_pure_flag], [[1]])], 75 [], [m4_define([b4_pure_flag], [[1]])], 76 [full], [m4_define([b4_pure_flag], [[2]])]) 77 78 m4_define([b4_pure_if], 79 [m4_case(b4_pure_flag, 80 [0], [$2], 81 [1], [$1], 82 [2], [$1])]) 83 [m4_fatal([invalid api.pure value: ]$1)])]) 84 85 # b4_yyerror_arg_loc_if(ARG) 86 # -------------------------- 87 # Expand ARG iff yyerror is to be given a location as argument. 88 m4_define([b4_yyerror_arg_loc_if], 89 [b4_locations_if([m4_case(b4_pure_flag, 90 [1], [m4_ifset([b4_parse_param], [$1])], 91 [2], [$1])])]) 92 93 # b4_yyerror_args 94 # --------------- 95 # Arguments passed to yyerror: user args plus yylloc. 96 m4_define([b4_yyerror_args], 97 [b4_yyerror_arg_loc_if([&yylloc, ])dnl 98 m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])]) 99 100 101 # b4_lex_param 102 # ------------ 103 # Accumulate in b4_lex_param all the yylex arguments. 104 # b4_lex_param arrives quoted twice, but we want to keep only one level. 105 m4_define([b4_lex_param], 106 m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl 107 b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl 108 m4_ifdef([b4_lex_param], b4_lex_param))) 109 110 111 ## ------------ ## 112 ## Data Types. ## 113 ## ------------ ## 114 115 # b4_int_type(MIN, MAX) 116 # --------------------- 117 # Return the smallest int type able to handle numbers ranging from 118 # MIN to MAX (included). Overwrite the version from c.m4, which 119 # uses only C89 types, so that the user can override the shorter 120 # types, and so that pre-C89 compilers are handled correctly. 121 m4_define([b4_int_type], 122 [m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8], 123 b4_ints_in($@, [-128], [127]), [1], [yytype_int8], 124 125 b4_ints_in($@, [0], [65535]), [1], [yytype_uint16], 126 b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16], 127 128 m4_eval([0 <= $1]), [1], [unsigned int], 129 130 [int])]) 131 132 133 ## ----------------- ## 134 ## Semantic Values. ## 135 ## ----------------- ## 136 137 138 # b4_lhs_value([TYPE]) 139 # -------------------- 140 # Expansion of $<TYPE>$. 141 m4_define([b4_lhs_value], 142 [(yyval[]m4_ifval([$1], [.$1]))]) 143 144 145 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) 146 # -------------------------------------- 147 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH 148 # symbols on RHS. 149 m4_define([b4_rhs_value], 150 [(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))]) 151 152 153 154 ## ----------- ## 155 ## Locations. ## 156 ## ----------- ## 157 158 # b4_lhs_location() 159 # ----------------- 160 # Expansion of @$. 161 m4_define([b4_lhs_location], 162 [(yyloc)]) 163 164 165 # b4_rhs_location(RULE-LENGTH, NUM) 166 # --------------------------------- 167 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols 168 # on RHS. 169 m4_define([b4_rhs_location], 170 [(yylsp@{($2) - ($1)@})]) 171 172 173 ## -------------- ## 174 ## Declarations. ## 175 ## -------------- ## 176 177 # b4_declare_scanner_communication_variables 178 # ------------------------------------------ 179 # Declare the variables that are global, or local to YYPARSE if 180 # pure-parser. 181 m4_define([b4_declare_scanner_communication_variables], [[ 182 /* The lookahead symbol. */ 183 int yychar; 184 185 ]b4_pure_if([[ 186 #if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__ 187 /* Suppress an incorrect diagnostic about yylval being uninitialized. */ 188 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \ 189 _Pragma ("GCC diagnostic push") \ 190 _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\ 191 _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"") 192 # define YY_IGNORE_MAYBE_UNINITIALIZED_END \ 193 _Pragma ("GCC diagnostic pop") 194 #else 195 /* Default value used for initialization, for pacifying older GCCs 196 or non-GCC compilers. */ 197 static YYSTYPE yyval_default; 198 # define YY_INITIAL_VALUE(Value) = Value 199 #endif]b4_locations_if([[ 200 static YYLTYPE yyloc_default][]b4_yyloc_default[;]])])[ 201 #ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 202 # define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 203 # define YY_IGNORE_MAYBE_UNINITIALIZED_END 204 #endif 205 #ifndef YY_INITIAL_VALUE 206 # define YY_INITIAL_VALUE(Value) /* Nothing. */ 207 #endif 208 209 /* The semantic value of the lookahead symbol. */ 210 YYSTYPE yylval YY_INITIAL_VALUE(yyval_default);]b4_locations_if([[ 211 212 /* Location data for the lookahead symbol. */ 213 YYLTYPE yylloc]b4_pure_if([ = yyloc_default], [b4_yyloc_default])[; 214 ]])b4_pure_if([], [[ 215 216 /* Number of syntax errors so far. */ 217 int yynerrs;]])]) 218 219 220 # b4_declare_parser_state_variables 221 # --------------------------------- 222 # Declare all the variables that are needed to maintain the parser state 223 # between calls to yypush_parse. 224 m4_define([b4_declare_parser_state_variables], [b4_pure_if([[ 225 /* Number of syntax errors so far. */ 226 int yynerrs; 227 ]])[ 228 int yystate; 229 /* Number of tokens to shift before error messages enabled. */ 230 int yyerrstatus; 231 232 /* The stacks and their tools: 233 `yyss': related to states. 234 `yyvs': related to semantic values.]b4_locations_if([[ 235 `yyls': related to locations.]])[ 236 237 Refer to the stacks through separate pointers, to allow yyoverflow 238 to reallocate them elsewhere. */ 239 240 /* The state stack. */ 241 yytype_int16 yyssa[YYINITDEPTH]; 242 yytype_int16 *yyss; 243 yytype_int16 *yyssp; 244 245 /* The semantic value stack. */ 246 YYSTYPE yyvsa[YYINITDEPTH]; 247 YYSTYPE *yyvs; 248 YYSTYPE *yyvsp;]b4_locations_if([[ 249 250 /* The location stack. */ 251 YYLTYPE yylsa[YYINITDEPTH]; 252 YYLTYPE *yyls; 253 YYLTYPE *yylsp; 254 255 /* The locations where the error started and ended. */ 256 YYLTYPE yyerror_range[3];]])[ 257 258 YYSIZE_T yystacksize;]b4_lac_if([[ 259 260 yytype_int16 yyesa@{]b4_percent_define_get([[parse.lac.es-capacity-initial]])[@}; 261 yytype_int16 *yyes; 262 YYSIZE_T yyes_capacity;]])]) 263 264 265 # b4_declare_yyparse_push_ 266 # ------------------------ 267 # Declaration of yyparse (and dependencies) when using the push parser 268 # (including in pull mode). 269 m4_define([b4_declare_yyparse_push_], 270 [[#ifndef YYPUSH_MORE_DEFINED 271 # define YYPUSH_MORE_DEFINED 272 enum { YYPUSH_MORE = 4 }; 273 #endif 274 275 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate; 276 277 ]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param) 278 ])b4_c_function_decl([b4_prefix[push_parse]], [[int]], 279 [[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([, 280 [[[int pushed_char]], [[pushed_char]]], 281 [[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([, 282 [[b4_api_PREFIX[LTYPE *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [, 283 b4_parse_param])) 284 b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]], 285 [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [, 286 b4_parse_param]))]) 287 b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]], 288 [[[void]], []]) 289 b4_c_function_decl([b4_prefix[pstate_delete]], [[void]], 290 [[b4_prefix[pstate *ps]], [[ps]]])dnl 291 ]) 292 293 # b4_declare_yyparse_ 294 # ------------------- 295 # When not the push parser. 296 m4_define([b4_declare_yyparse_], 297 [[#ifdef YYPARSE_PARAM 298 ]b4_c_function_decl(b4_prefix[parse], [int], 299 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[ 300 #else /* ! YYPARSE_PARAM */ 301 ]b4_c_function_decl(b4_prefix[parse], [int], b4_parse_param)[ 302 #endif /* ! YYPARSE_PARAM */]dnl 303 ]) 304 305 306 # b4_declare_yyparse 307 # ------------------ 308 m4_define([b4_declare_yyparse], 309 [b4_push_if([b4_declare_yyparse_push_], 310 [b4_declare_yyparse_])[]dnl 311 ]) 312 313 314 # b4_shared_declarations 315 # ---------------------- 316 # Declaration that might either go into the header (if --defines) 317 # or open coded in the parser body. 318 m4_define([b4_shared_declarations], 319 [b4_cpp_guard_open([b4_spec_defines_file])[ 320 ]b4_declare_yydebug[ 321 ]b4_percent_code_get([[requires]])[ 322 ]b4_token_enums_defines(b4_tokens)[ 323 ]b4_declare_yylstype[ 324 ]b4_declare_yyparse[ 325 ]b4_percent_code_get([[provides]])[ 326 ]b4_cpp_guard_close([b4_spec_defines_file])[]dnl 327 ]) 328 329 330 ## -------------- ## 331 ## Output files. ## 332 ## -------------- ## 333 334 b4_output_begin([b4_parser_file_name]) 335 b4_copyright([Bison implementation for Yacc-like parsers in C], 336 [1984, 1989-1990, 2000-2012])[ 337 338 /* C LALR(1) parser skeleton written by Richard Stallman, by 339 simplifying the original so-called "semantic" parser. */ 340 341 /* All symbols defined below should begin with yy or YY, to avoid 342 infringing on user name space. This should be done even for local 343 variables, as they might otherwise be expanded by user macros. 344 There are some unavoidable exceptions within include files to 345 define necessary library symbols; they are noted "INFRINGES ON 346 USER NAME SPACE" below. */ 347 348 ]b4_identification 349 b4_percent_code_get([[top]])[]dnl 350 m4_if(b4_api_prefix, [yy], [], 351 [[/* Substitute the type names. */ 352 #define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[ 353 #define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[ 354 ]m4_if(b4_prefix, [yy], [], 355 [[/* Substitute the variable and function names. */]b4_pull_if([[ 356 #define yyparse ]b4_prefix[parse]])b4_push_if([[ 357 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[ 358 #define yypull_parse ]b4_prefix[pull_parse]])[ 359 #define yypstate_new ]b4_prefix[pstate_new 360 #define yypstate_delete ]b4_prefix[pstate_delete 361 #define yypstate ]b4_prefix[pstate]])[ 362 #define yylex ]b4_prefix[lex 363 #define yyerror ]b4_prefix[error 364 #define yylval ]b4_prefix[lval 365 #define yychar ]b4_prefix[char 366 #define yydebug ]b4_prefix[debug 367 #define yynerrs ]b4_prefix[nerrs]b4_locations_if([[ 368 #define yylloc ]b4_prefix[lloc]])])[ 369 370 /* Copy the first part of user declarations. */ 371 ]b4_user_pre_prologue[ 372 373 ]b4_null_define[ 374 375 /* Enabling verbose error messages. */ 376 #ifdef YYERROR_VERBOSE 377 # undef YYERROR_VERBOSE 378 # define YYERROR_VERBOSE 1 379 #else 380 # define YYERROR_VERBOSE ]b4_error_verbose_flag[ 381 #endif 382 383 ]m4_ifval(m4_quote(b4_spec_defines_file), 384 [[/* In a future release of Bison, this section will be replaced 385 by #include "@basename(]b4_spec_defines_file[@)". */ 386 ]])dnl 387 b4_shared_declarations[ 388 389 /* Copy the second part of user declarations. */ 390 ]b4_user_post_prologue 391 b4_percent_code_get[]dnl 392 393 [#ifdef short 394 # undef short 395 #endif 396 397 #ifdef YYTYPE_UINT8 398 typedef YYTYPE_UINT8 yytype_uint8; 399 #else 400 typedef unsigned char yytype_uint8; 401 #endif 402 403 #ifdef YYTYPE_INT8 404 typedef YYTYPE_INT8 yytype_int8; 405 #elif ]b4_c_modern[ 406 typedef signed char yytype_int8; 407 #else 408 typedef short int yytype_int8; 409 #endif 410 411 #ifdef YYTYPE_UINT16 412 typedef YYTYPE_UINT16 yytype_uint16; 413 #else 414 typedef unsigned short int yytype_uint16; 415 #endif 416 417 #ifdef YYTYPE_INT16 418 typedef YYTYPE_INT16 yytype_int16; 419 #else 420 typedef short int yytype_int16; 421 #endif 422 423 #ifndef YYSIZE_T 424 # ifdef __SIZE_TYPE__ 425 # define YYSIZE_T __SIZE_TYPE__ 426 # elif defined size_t 427 # define YYSIZE_T size_t 428 # elif ! defined YYSIZE_T && ]b4_c_modern[ 429 # include <stddef.h> /* INFRINGES ON USER NAME SPACE */ 430 # define YYSIZE_T size_t 431 # else 432 # define YYSIZE_T unsigned int 433 # endif 434 #endif 435 436 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1) 437 438 #ifndef YY_ 439 # if defined YYENABLE_NLS && YYENABLE_NLS 440 # if ENABLE_NLS 441 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */ 442 # define YY_(Msgid) dgettext ("bison-runtime", Msgid) 443 # endif 444 # endif 445 # ifndef YY_ 446 # define YY_(Msgid) Msgid 447 # endif 448 #endif 449 450 /* Suppress unused-variable warnings by "using" E. */ 451 #if ! defined lint || defined __GNUC__ 452 # define YYUSE(E) ((void) (E)) 453 #else 454 # define YYUSE(E) /* empty */ 455 #endif 456 457 /* Identity function, used to suppress warnings about constant conditions. */ 458 #ifndef lint 459 # define YYID(N) (N) 460 #else 461 ]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[ 462 { 463 return yyi; 464 } 465 #endif 466 467 #if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[ 468 469 /* The parser invokes alloca or malloc; define the necessary symbols. */]dnl 470 b4_push_if([], [b4_lac_if([], [[ 471 472 # ifdef YYSTACK_USE_ALLOCA 473 # if YYSTACK_USE_ALLOCA 474 # ifdef __GNUC__ 475 # define YYSTACK_ALLOC __builtin_alloca 476 # elif defined __BUILTIN_VA_ARG_INCR 477 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */ 478 # elif defined _AIX 479 # define YYSTACK_ALLOC __alloca 480 # elif defined _MSC_VER 481 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */ 482 # define alloca _alloca 483 # else 484 # define YYSTACK_ALLOC alloca 485 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && ]b4_c_modern[ 486 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */ 487 /* Use EXIT_SUCCESS as a witness for stdlib.h. */ 488 # ifndef EXIT_SUCCESS 489 # define EXIT_SUCCESS 0 490 # endif 491 # endif 492 # endif 493 # endif 494 # endif]])])[ 495 496 # ifdef YYSTACK_ALLOC 497 /* Pacify GCC's `empty if-body' warning. */ 498 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0)) 499 # ifndef YYSTACK_ALLOC_MAXIMUM 500 /* The OS might guarantee only one guard page at the bottom of the stack, 501 and a page size can be as small as 4096 bytes. So we cannot safely 502 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number 503 to allow for a few compiler-allocated temporary stack slots. */ 504 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */ 505 # endif 506 # else 507 # define YYSTACK_ALLOC YYMALLOC 508 # define YYSTACK_FREE YYFREE 509 # ifndef YYSTACK_ALLOC_MAXIMUM 510 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM 511 # endif 512 # if (defined __cplusplus && ! defined EXIT_SUCCESS \ 513 && ! ((defined YYMALLOC || defined malloc) \ 514 && (defined YYFREE || defined free))) 515 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */ 516 # ifndef EXIT_SUCCESS 517 # define EXIT_SUCCESS 0 518 # endif 519 # endif 520 # ifndef YYMALLOC 521 # define YYMALLOC malloc 522 # if ! defined malloc && ! defined EXIT_SUCCESS && ]b4_c_modern[ 523 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */ 524 # endif 525 # endif 526 # ifndef YYFREE 527 # define YYFREE free 528 # if ! defined free && ! defined EXIT_SUCCESS && ]b4_c_modern[ 529 void free (void *); /* INFRINGES ON USER NAME SPACE */ 530 # endif 531 # endif 532 # endif]b4_lac_if([[ 533 # define YYCOPY_NEEDED 1]])[ 534 #endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[ 535 536 537 #if (! defined yyoverflow \ 538 && (! defined __cplusplus \ 539 || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \ 540 && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL))) 541 542 /* A type that is properly aligned for any stack member. */ 543 union yyalloc 544 { 545 yytype_int16 yyss_alloc; 546 YYSTYPE yyvs_alloc;]b4_locations_if([ 547 YYLTYPE yyls_alloc;])[ 548 }; 549 550 /* The size of the maximum gap between one aligned stack and the next. */ 551 # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1) 552 553 /* The size of an array large to enough to hold all stacks, each with 554 N elements. */ 555 ]b4_locations_if( 556 [# define YYSTACK_BYTES(N) \ 557 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \ 558 + 2 * YYSTACK_GAP_MAXIMUM)], 559 [# define YYSTACK_BYTES(N) \ 560 ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \ 561 + YYSTACK_GAP_MAXIMUM)])[ 562 563 # define YYCOPY_NEEDED 1 564 565 /* Relocate STACK from its old location to the new one. The 566 local variables YYSIZE and YYSTACKSIZE give the old and new number of 567 elements in the stack, and YYPTR gives the new location of the 568 stack. Advance YYPTR to a properly aligned location for the next 569 stack. */ 570 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \ 571 do \ 572 { \ 573 YYSIZE_T yynewbytes; \ 574 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \ 575 Stack = &yyptr->Stack_alloc; \ 576 yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \ 577 yyptr += yynewbytes / sizeof (*yyptr); \ 578 } \ 579 while (YYID (0)) 580 581 #endif 582 583 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED 584 /* Copy COUNT objects from SRC to DST. The source and destination do 585 not overlap. */ 586 # ifndef YYCOPY 587 # if defined __GNUC__ && 1 < __GNUC__ 588 # define YYCOPY(Dst, Src, Count) \ 589 __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src))) 590 # else 591 # define YYCOPY(Dst, Src, Count) \ 592 do \ 593 { \ 594 YYSIZE_T yyi; \ 595 for (yyi = 0; yyi < (Count); yyi++) \ 596 (Dst)[yyi] = (Src)[yyi]; \ 597 } \ 598 while (YYID (0)) 599 # endif 600 # endif 601 #endif /* !YYCOPY_NEEDED */ 602 603 /* YYFINAL -- State number of the termination state. */ 604 #define YYFINAL ]b4_final_state_number[ 605 /* YYLAST -- Last index in YYTABLE. */ 606 #define YYLAST ]b4_last[ 607 608 /* YYNTOKENS -- Number of terminals. */ 609 #define YYNTOKENS ]b4_tokens_number[ 610 /* YYNNTS -- Number of nonterminals. */ 611 #define YYNNTS ]b4_nterms_number[ 612 /* YYNRULES -- Number of rules. */ 613 #define YYNRULES ]b4_rules_number[ 614 /* YYNRULES -- Number of states. */ 615 #define YYNSTATES ]b4_states_number[ 616 617 /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ 618 #define YYUNDEFTOK ]b4_undef_token_number[ 619 #define YYMAXUTOK ]b4_user_token_number_max[ 620 621 #define YYTRANSLATE(YYX) \ 622 ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) 623 624 /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */ 625 static const ]b4_int_type_for([b4_translate])[ yytranslate[] = 626 { 627 ]b4_translate[ 628 }; 629 630 #if ]b4_api_PREFIX[DEBUG 631 /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in 632 YYRHS. */ 633 static const ]b4_int_type_for([b4_prhs])[ yyprhs[] = 634 { 635 ]b4_prhs[ 636 }; 637 638 /* YYRHS -- A `-1'-separated list of the rules' RHS. */ 639 static const ]b4_int_type_for([b4_rhs])[ yyrhs[] = 640 { 641 ]b4_rhs[ 642 }; 643 644 /* YYRLINE[YYN] -- source line where rule number YYN was defined. */ 645 static const ]b4_int_type_for([b4_rline])[ yyrline[] = 646 { 647 ]b4_rline[ 648 }; 649 #endif 650 651 #if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[ 652 /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. 653 First, the terminals, then, starting at YYNTOKENS, nonterminals. */ 654 static const char *const yytname[] = 655 { 656 ]b4_tname[ 657 }; 658 #endif 659 660 # ifdef YYPRINT 661 /* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to 662 token YYLEX-NUM. */ 663 static const ]b4_int_type_for([b4_toknum])[ yytoknum[] = 664 { 665 ]b4_toknum[ 666 }; 667 # endif 668 669 /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ 670 static const ]b4_int_type_for([b4_r1])[ yyr1[] = 671 { 672 ]b4_r1[ 673 }; 674 675 /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ 676 static const ]b4_int_type_for([b4_r2])[ yyr2[] = 677 { 678 ]b4_r2[ 679 }; 680 681 /* YYDEFACT[STATE-NAME] -- Default reduction number in state STATE-NUM. 682 Performed when YYTABLE doesn't specify something else to do. Zero 683 means the default is an error. */ 684 static const ]b4_int_type_for([b4_defact])[ yydefact[] = 685 { 686 ]b4_defact[ 687 }; 688 689 /* YYDEFGOTO[NTERM-NUM]. */ 690 static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] = 691 { 692 ]b4_defgoto[ 693 }; 694 695 /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing 696 STATE-NUM. */ 697 #define YYPACT_NINF ]b4_pact_ninf[ 698 static const ]b4_int_type_for([b4_pact])[ yypact[] = 699 { 700 ]b4_pact[ 701 }; 702 703 /* YYPGOTO[NTERM-NUM]. */ 704 static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] = 705 { 706 ]b4_pgoto[ 707 }; 708 709 /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If 710 positive, shift that token. If negative, reduce the rule which 711 number is the opposite. If YYTABLE_NINF, syntax error. */ 712 #define YYTABLE_NINF ]b4_table_ninf[ 713 static const ]b4_int_type_for([b4_table])[ yytable[] = 714 { 715 ]b4_table[ 716 }; 717 718 #define yypact_value_is_default(Yystate) \ 719 ]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[ 720 721 #define yytable_value_is_error(Yytable_value) \ 722 ]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[ 723 724 static const ]b4_int_type_for([b4_check])[ yycheck[] = 725 { 726 ]b4_check[ 727 }; 728 729 /* YYSTOS[STATE-NUM] -- The (internal number of the) accessing 730 symbol of state STATE-NUM. */ 731 static const ]b4_int_type_for([b4_stos])[ yystos[] = 732 { 733 ]b4_stos[ 734 }; 735 736 #define yyerrok (yyerrstatus = 0) 737 #define yyclearin (yychar = YYEMPTY) 738 #define YYEMPTY (-2) 739 #define YYEOF 0 740 741 #define YYACCEPT goto yyacceptlab 742 #define YYABORT goto yyabortlab 743 #define YYERROR goto yyerrorlab 744 745 746 /* Like YYERROR except do call yyerror. This remains here temporarily 747 to ease the transition to the new meaning of YYERROR, for GCC. 748 Once GCC version 2 has supplanted version 1, this can go. However, 749 YYFAIL appears to be in use. Nevertheless, it is formally deprecated 750 in Bison 2.4.2's NEWS entry, where a plan to phase it out is 751 discussed. */ 752 753 #define YYFAIL goto yyerrlab 754 #if defined YYFAIL 755 /* This is here to suppress warnings from the GCC cpp's 756 -Wunused-macros. Normally we don't worry about that warning, but 757 some users do, and we want to make it easy for users to remove 758 YYFAIL uses, which will produce warnings from Bison 2.5. */ 759 #endif 760 761 #define YYRECOVERING() (!!yyerrstatus) 762 763 #define YYBACKUP(Token, Value) \ 764 do \ 765 if (yychar == YYEMPTY) \ 766 { \ 767 yychar = (Token); \ 768 yylval = (Value); \ 769 YYPOPSTACK (yylen); \ 770 yystate = *yyssp; \]b4_lac_if([[ 771 YY_LAC_DISCARD ("YYBACKUP"); \]])[ 772 goto yybackup; \ 773 } \ 774 else \ 775 { \ 776 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \ 777 YYERROR; \ 778 } \ 779 while (YYID (0)) 780 781 /* Error token number */ 782 #define YYTERROR 1 783 #define YYERRCODE 256 784 785 ]b4_locations_if([[ 786 ]b4_yylloc_default_define[ 787 #define YYRHSLOC(Rhs, K) ((Rhs)[K]) 788 ]])[ 789 ]b4_yy_location_print_define[ 790 791 /* YYLEX -- calling `yylex' with the right arguments. */ 792 #ifdef YYLEX_PARAM 793 # define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM) 794 #else 795 # define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[ 796 #endif 797 798 /* Enable debugging if requested. */ 799 #if ]b4_api_PREFIX[DEBUG 800 801 # ifndef YYFPRINTF 802 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */ 803 # define YYFPRINTF fprintf 804 # endif 805 806 # define YYDPRINTF(Args) \ 807 do { \ 808 if (yydebug) \ 809 YYFPRINTF Args; \ 810 } while (YYID (0)) 811 812 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ 813 do { \ 814 if (yydebug) \ 815 { \ 816 YYFPRINTF (stderr, "%s ", Title); \ 817 yy_symbol_print (stderr, \ 818 Type, Value]b4_locations_if([, Location])[]b4_user_args[); \ 819 YYFPRINTF (stderr, "\n"); \ 820 } \ 821 } while (YYID (0)) 822 823 ]b4_yy_symbol_print_generate([b4_c_function_def])[ 824 825 /*------------------------------------------------------------------. 826 | yy_stack_print -- Print the state stack from its BOTTOM up to its | 827 | TOP (included). | 828 `------------------------------------------------------------------*/ 829 830 ]b4_c_function_def([yy_stack_print], [static void], 831 [[yytype_int16 *yybottom], [yybottom]], 832 [[yytype_int16 *yytop], [yytop]])[ 833 { 834 YYFPRINTF (stderr, "Stack now"); 835 for (; yybottom <= yytop; yybottom++) 836 { 837 int yybot = *yybottom; 838 YYFPRINTF (stderr, " %d", yybot); 839 } 840 YYFPRINTF (stderr, "\n"); 841 } 842 843 # define YY_STACK_PRINT(Bottom, Top) \ 844 do { \ 845 if (yydebug) \ 846 yy_stack_print ((Bottom), (Top)); \ 847 } while (YYID (0)) 848 849 850 /*------------------------------------------------. 851 | Report that the YYRULE is going to be reduced. | 852 `------------------------------------------------*/ 853 854 ]b4_c_function_def([yy_reduce_print], [static void], 855 [[YYSTYPE *yyvsp], [yyvsp]], 856 b4_locations_if([[[YYLTYPE *yylsp], [yylsp]], 857 ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [, 858 b4_parse_param]))[ 859 { 860 int yynrhs = yyr2[yyrule]; 861 int yyi; 862 unsigned long int yylno = yyrline[yyrule]; 863 YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n", 864 yyrule - 1, yylno); 865 /* The symbols being reduced. */ 866 for (yyi = 0; yyi < yynrhs; yyi++) 867 { 868 YYFPRINTF (stderr, " $%d = ", yyi + 1); 869 yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi], 870 &]b4_rhs_value(yynrhs, yyi + 1)[ 871 ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl 872 b4_user_args[); 873 YYFPRINTF (stderr, "\n"); 874 } 875 } 876 877 # define YY_REDUCE_PRINT(Rule) \ 878 do { \ 879 if (yydebug) \ 880 yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \ 881 } while (YYID (0)) 882 883 /* Nonzero means print parse trace. It is left uninitialized so that 884 multiple parsers can coexist. */ 885 int yydebug; 886 #else /* !]b4_api_PREFIX[DEBUG */ 887 # define YYDPRINTF(Args) 888 # define YY_SYMBOL_PRINT(Title, Type, Value, Location) 889 # define YY_STACK_PRINT(Bottom, Top) 890 # define YY_REDUCE_PRINT(Rule) 891 #endif /* !]b4_api_PREFIX[DEBUG */ 892 893 894 /* YYINITDEPTH -- initial size of the parser's stacks. */ 895 #ifndef YYINITDEPTH 896 # define YYINITDEPTH ]b4_stack_depth_init[ 897 #endif 898 899 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only 900 if the built-in stack extension method is used). 901 902 Do not make this value too large; the results are undefined if 903 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH) 904 evaluated with infinite-precision integer arithmetic. */ 905 906 #ifndef YYMAXDEPTH 907 # define YYMAXDEPTH ]b4_stack_depth_max[ 908 #endif]b4_lac_if([[ 909 910 /* Given a state stack such that *YYBOTTOM is its bottom, such that 911 *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty 912 stack, and such that *YYCAPACITY is the maximum number of elements it 913 can hold without a reallocation, make sure there is enough room to 914 store YYADD more elements. If not, allocate a new stack using 915 YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM, 916 *YYTOP, and *YYCAPACITY to reflect the new capacity and memory 917 location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack 918 using YYSTACK_FREE. Return 0 if successful or if no reallocation is 919 required. Return 1 if memory is exhausted. */ 920 static int 921 yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd, 922 #if ]b4_api_PREFIX[DEBUG 923 char const *yydebug_prefix, 924 char const *yydebug_suffix, 925 #endif 926 yytype_int16 **yybottom, 927 yytype_int16 *yybottom_no_free, 928 yytype_int16 **yytop, yytype_int16 *yytop_empty) 929 { 930 YYSIZE_T yysize_old = 931 *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1; 932 YYSIZE_T yysize_new = yysize_old + yyadd; 933 if (*yycapacity < yysize_new) 934 { 935 YYSIZE_T yyalloc = 2 * yysize_new; 936 yytype_int16 *yybottom_new; 937 /* Use YYMAXDEPTH for maximum stack size given that the stack 938 should never need to grow larger than the main state stack 939 needs to grow without LAC. */ 940 if (YYMAXDEPTH < yysize_new) 941 { 942 YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix, 943 yydebug_suffix)); 944 return 1; 945 } 946 if (YYMAXDEPTH < yyalloc) 947 yyalloc = YYMAXDEPTH; 948 yybottom_new = 949 (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new); 950 if (!yybottom_new) 951 { 952 YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix, 953 yydebug_suffix)); 954 return 1; 955 } 956 if (*yytop != yytop_empty) 957 { 958 YYCOPY (yybottom_new, *yybottom, yysize_old); 959 *yytop = yybottom_new + (yysize_old - 1); 960 } 961 if (*yybottom != yybottom_no_free) 962 YYSTACK_FREE (*yybottom); 963 *yybottom = yybottom_new; 964 *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]), 965 [full], [[ 966 YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix, 967 (unsigned long int) yyalloc, yydebug_suffix));]])[ 968 } 969 return 0; 970 } 971 972 /* Establish the initial context for the current lookahead if no initial 973 context is currently established. 974 975 We define a context as a snapshot of the parser stacks. We define 976 the initial context for a lookahead as the context in which the 977 parser initially examines that lookahead in order to select a 978 syntactic action. Thus, if the lookahead eventually proves 979 syntactically unacceptable (possibly in a later context reached via a 980 series of reductions), the initial context can be used to determine 981 the exact set of tokens that would be syntactically acceptable in the 982 lookahead's place. Moreover, it is the context after which any 983 further semantic actions would be erroneous because they would be 984 determined by a syntactically unacceptable token. 985 986 YY_LAC_ESTABLISH should be invoked when a reduction is about to be 987 performed in an inconsistent state (which, for the purposes of LAC, 988 includes consistent states that don't know they're consistent because 989 their default reductions have been disabled). Iff there is a 990 lookahead token, it should also be invoked before reporting a syntax 991 error. This latter case is for the sake of the debugging output. 992 993 For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as 994 follows. If no initial context is currently established for the 995 current lookahead, then check if that lookahead can eventually be 996 shifted if syntactic actions continue from the current context. 997 Report a syntax error if it cannot. */ 998 #define YY_LAC_ESTABLISH \ 999 do { \ 1000 if (!yy_lac_established) \ 1001 { \ 1002 YYDPRINTF ((stderr, \ 1003 "LAC: initial context established for %s\n", \ 1004 yytname[yytoken])); \ 1005 yy_lac_established = 1; \ 1006 { \ 1007 int yy_lac_status = \ 1008 yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \ 1009 if (yy_lac_status == 2) \ 1010 goto yyexhaustedlab; \ 1011 if (yy_lac_status == 1) \ 1012 goto yyerrlab; \ 1013 } \ 1014 } \ 1015 } while (YYID (0)) 1016 1017 /* Discard any previous initial lookahead context because of Event, 1018 which may be a lookahead change or an invalidation of the currently 1019 established initial context for the current lookahead. 1020 1021 The most common example of a lookahead change is a shift. An example 1022 of both cases is syntax error recovery. That is, a syntax error 1023 occurs when the lookahead is syntactically erroneous for the 1024 currently established initial context, so error recovery manipulates 1025 the parser stacks to try to find a new initial context in which the 1026 current lookahead is syntactically acceptable. If it fails to find 1027 such a context, it discards the lookahead. */ 1028 #if ]b4_api_PREFIX[DEBUG 1029 # define YY_LAC_DISCARD(Event) \ 1030 do { \ 1031 if (yy_lac_established) \ 1032 { \ 1033 if (yydebug) \ 1034 YYFPRINTF (stderr, "LAC: initial context discarded due to " \ 1035 Event "\n"); \ 1036 yy_lac_established = 0; \ 1037 } \ 1038 } while (YYID (0)) 1039 #else 1040 # define YY_LAC_DISCARD(Event) yy_lac_established = 0 1041 #endif 1042 1043 /* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can 1044 eventually (after perhaps some reductions) be shifted, return 1 if 1045 not, or return 2 if memory is exhausted. As preconditions and 1046 postconditions: *YYES_CAPACITY is the allocated size of the array to 1047 which *YYES points, and either *YYES = YYESA or *YYES points to an 1048 array allocated with YYSTACK_ALLOC. yy_lac may overwrite the 1049 contents of either array, alter *YYES and *YYES_CAPACITY, and free 1050 any old *YYES other than YYESA. */ 1051 static int 1052 yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes, 1053 YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken) 1054 { 1055 yytype_int16 *yyes_prev = yyssp; 1056 yytype_int16 *yyesp = yyes_prev; 1057 YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken])); 1058 if (yytoken == YYUNDEFTOK) 1059 { 1060 YYDPRINTF ((stderr, " Always Err\n")); 1061 return 1; 1062 } 1063 while (1) 1064 { 1065 int yyrule = yypact[*yyesp]; 1066 if (yypact_value_is_default (yyrule) 1067 || (yyrule += yytoken) < 0 || YYLAST < yyrule 1068 || yycheck[yyrule] != yytoken) 1069 { 1070 yyrule = yydefact[*yyesp]; 1071 if (yyrule == 0) 1072 { 1073 YYDPRINTF ((stderr, " Err\n")); 1074 return 1; 1075 } 1076 } 1077 else 1078 { 1079 yyrule = yytable[yyrule]; 1080 if (yytable_value_is_error (yyrule)) 1081 { 1082 YYDPRINTF ((stderr, " Err\n")); 1083 return 1; 1084 } 1085 if (0 < yyrule) 1086 { 1087 YYDPRINTF ((stderr, " S%d\n", yyrule)); 1088 return 0; 1089 } 1090 yyrule = -yyrule; 1091 } 1092 { 1093 YYSIZE_T yylen = yyr2[yyrule]; 1094 YYDPRINTF ((stderr, " R%d", yyrule - 1)); 1095 if (yyesp != yyes_prev) 1096 { 1097 YYSIZE_T yysize = yyesp - *yyes + 1; 1098 if (yylen < yysize) 1099 { 1100 yyesp -= yylen; 1101 yylen = 0; 1102 } 1103 else 1104 { 1105 yylen -= yysize; 1106 yyesp = yyes_prev; 1107 } 1108 } 1109 if (yylen) 1110 yyesp = yyes_prev -= yylen; 1111 } 1112 { 1113 int yystate; 1114 { 1115 int yylhs = yyr1[yyrule] - YYNTOKENS; 1116 yystate = yypgoto[yylhs] + *yyesp; 1117 if (yystate < 0 || YYLAST < yystate 1118 || yycheck[yystate] != *yyesp) 1119 yystate = yydefgoto[yylhs]; 1120 else 1121 yystate = yytable[yystate]; 1122 } 1123 if (yyesp == yyes_prev) 1124 { 1125 yyesp = *yyes; 1126 *yyesp = yystate; 1127 } 1128 else 1129 { 1130 if (yy_lac_stack_realloc (yyes_capacity, 1, 1131 #if ]b4_api_PREFIX[DEBUG 1132 " (", ")", 1133 #endif 1134 yyes, yyesa, &yyesp, yyes_prev)) 1135 { 1136 YYDPRINTF ((stderr, "\n")); 1137 return 2; 1138 } 1139 *++yyesp = yystate; 1140 } 1141 YYDPRINTF ((stderr, " G%d", yystate)); 1142 } 1143 } 1144 }]])[ 1145 1146 1147 #if YYERROR_VERBOSE 1148 1149 # ifndef yystrlen 1150 # if defined __GLIBC__ && defined _STRING_H 1151 # define yystrlen strlen 1152 # else 1153 /* Return the length of YYSTR. */ 1154 ]b4_c_function_def([yystrlen], [static YYSIZE_T], 1155 [[const char *yystr], [yystr]])[ 1156 { 1157 YYSIZE_T yylen; 1158 for (yylen = 0; yystr[yylen]; yylen++) 1159 continue; 1160 return yylen; 1161 } 1162 # endif 1163 # endif 1164 1165 # ifndef yystpcpy 1166 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE 1167 # define yystpcpy stpcpy 1168 # else 1169 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in 1170 YYDEST. */ 1171 ]b4_c_function_def([yystpcpy], [static char *], 1172 [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[ 1173 { 1174 char *yyd = yydest; 1175 const char *yys = yysrc; 1176 1177 while ((*yyd++ = *yys++) != '\0') 1178 continue; 1179 1180 return yyd - 1; 1181 } 1182 # endif 1183 # endif 1184 1185 # ifndef yytnamerr 1186 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary 1187 quotes and backslashes, so that it's suitable for yyerror. The 1188 heuristic is that double-quoting is unnecessary unless the string 1189 contains an apostrophe, a comma, or backslash (other than 1190 backslash-backslash). YYSTR is taken from yytname. If YYRES is 1191 null, do not copy; instead, return the length of what the result 1192 would have been. */ 1193 static YYSIZE_T 1194 yytnamerr (char *yyres, const char *yystr) 1195 { 1196 if (*yystr == '"') 1197 { 1198 YYSIZE_T yyn = 0; 1199 char const *yyp = yystr; 1200 1201 for (;;) 1202 switch (*++yyp) 1203 { 1204 case '\'': 1205 case ',': 1206 goto do_not_strip_quotes; 1207 1208 case '\\': 1209 if (*++yyp != '\\') 1210 goto do_not_strip_quotes; 1211 /* Fall through. */ 1212 default: 1213 if (yyres) 1214 yyres[yyn] = *yyp; 1215 yyn++; 1216 break; 1217 1218 case '"': 1219 if (yyres) 1220 yyres[yyn] = '\0'; 1221 return yyn; 1222 } 1223 do_not_strip_quotes: ; 1224 } 1225 1226 if (! yyres) 1227 return yystrlen (yystr); 1228 1229 return yystpcpy (yyres, yystr) - yyres; 1230 } 1231 # endif 1232 1233 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message 1234 about the unexpected token YYTOKEN for the state stack whose top is 1235 YYSSP.]b4_lac_if([[ In order to see if a particular token T is a 1236 valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[ 1237 1238 Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is 1239 not large enough to hold the message. In that case, also set 1240 *YYMSG_ALLOC to the required number of bytes. Return 2 if the 1241 required number of bytes is too large to store]b4_lac_if([[ or if 1242 yy_lac returned 2]])[. */ 1243 static int 1244 yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg, 1245 ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes, 1246 YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken) 1247 { 1248 YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]); 1249 YYSIZE_T yysize = yysize0; 1250 enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; 1251 /* Internationalized format string. */ 1252 const char *yyformat = YY_NULL; 1253 /* Arguments of yyformat. */ 1254 char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; 1255 /* Number of reported tokens (one for the "unexpected", one per 1256 "expected"). */ 1257 int yycount = 0; 1258 1259 /* There are many possibilities here to consider: 1260 - Assume YYFAIL is not used. It's too flawed to consider. See 1261 <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html> 1262 for details. YYERROR is fine as it does not invoke this 1263 function. 1264 - If this state is a consistent state with a default action, then 1265 the only way this function was invoked is if the default action 1266 is an error action. In that case, don't check for expected 1267 tokens because there are none. 1268 - The only way there can be no lookahead present (in yychar) is if 1269 this state is a consistent state with a default action. Thus, 1270 detecting the absence of a lookahead is sufficient to determine 1271 that there is no unexpected or expected token to report. In that 1272 case, just report a simple "syntax error". 1273 - Don't assume there isn't a lookahead just because this state is a 1274 consistent state with a default action. There might have been a 1275 previous inconsistent state, consistent state with a non-default 1276 action, or user semantic action that manipulated yychar.]b4_lac_if([[ 1277 In the first two cases, it might appear that the current syntax 1278 error should have been detected in the previous state when yy_lac 1279 was invoked. However, at that time, there might have been a 1280 different syntax error that discarded a different initial context 1281 during error recovery, leaving behind the current lookahead.]], [[ 1282 - Of course, the expected token list depends on states to have 1283 correct lookahead information, and it depends on the parser not 1284 to perform extra reductions after fetching a lookahead from the 1285 scanner and before detecting a syntax error. Thus, state merging 1286 (from LALR or IELR) and default reductions corrupt the expected 1287 token list. However, the list is correct for canonical LR with 1288 one exception: it will still contain any token that will not be 1289 accepted due to an error action in a later state.]])[ 1290 */ 1291 if (yytoken != YYEMPTY) 1292 { 1293 int yyn = yypact[*yyssp];]b4_lac_if([[ 1294 YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[ 1295 yyarg[yycount++] = yytname[yytoken]; 1296 if (!yypact_value_is_default (yyn)) 1297 {]b4_lac_if([], [[ 1298 /* Start YYX at -YYN if negative to avoid negative indexes in 1299 YYCHECK. In other words, skip the first -YYN actions for 1300 this state because they are default actions. */ 1301 int yyxbegin = yyn < 0 ? -yyn : 0; 1302 /* Stay within bounds of both yycheck and yytname. */ 1303 int yychecklim = YYLAST - yyn + 1; 1304 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[ 1305 int yyx;]b4_lac_if([[ 1306 1307 for (yyx = 0; yyx < YYNTOKENS; ++yyx) 1308 if (yyx != YYTERROR && yyx != YYUNDEFTOK) 1309 { 1310 { 1311 int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity, 1312 yyssp, yyx); 1313 if (yy_lac_status == 2) 1314 return 2; 1315 if (yy_lac_status == 1) 1316 continue; 1317 }]], [[ 1318 1319 for (yyx = yyxbegin; yyx < yyxend; ++yyx) 1320 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR 1321 && !yytable_value_is_error (yytable[yyx + yyn])) 1322 {]])[ 1323 if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) 1324 { 1325 yycount = 1; 1326 yysize = yysize0; 1327 break; 1328 } 1329 yyarg[yycount++] = yytname[yyx]; 1330 { 1331 YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]); 1332 if (! (yysize <= yysize1 1333 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) 1334 return 2; 1335 yysize = yysize1; 1336 } 1337 } 1338 }]b4_lac_if([[ 1339 # if ]b4_api_PREFIX[DEBUG 1340 else if (yydebug) 1341 YYFPRINTF (stderr, "No expected tokens.\n"); 1342 # endif]])[ 1343 } 1344 1345 switch (yycount) 1346 { 1347 # define YYCASE_(N, S) \ 1348 case N: \ 1349 yyformat = S; \ 1350 break 1351 YYCASE_(0, YY_("syntax error")); 1352 YYCASE_(1, YY_("syntax error, unexpected %s")); 1353 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); 1354 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); 1355 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); 1356 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); 1357 # undef YYCASE_ 1358 } 1359 1360 { 1361 YYSIZE_T yysize1 = yysize + yystrlen (yyformat); 1362 if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) 1363 return 2; 1364 yysize = yysize1; 1365 } 1366 1367 if (*yymsg_alloc < yysize) 1368 { 1369 *yymsg_alloc = 2 * yysize; 1370 if (! (yysize <= *yymsg_alloc 1371 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM)) 1372 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM; 1373 return 1; 1374 } 1375 1376 /* Avoid sprintf, as that infringes on the user's name space. 1377 Don't have undefined behavior even if the translation 1378 produced a string with the wrong number of "%s"s. */ 1379 { 1380 char *yyp = *yymsg; 1381 int yyi = 0; 1382 while ((*yyp = *yyformat) != '\0') 1383 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount) 1384 { 1385 yyp += yytnamerr (yyp, yyarg[yyi++]); 1386 yyformat += 2; 1387 } 1388 else 1389 { 1390 yyp++; 1391 yyformat++; 1392 } 1393 } 1394 return 0; 1395 } 1396 #endif /* YYERROR_VERBOSE */ 1397 1398 ]b4_yydestruct_generate([b4_c_function_def])[ 1399 1400 ]b4_pure_if([], [ 1401 1402 b4_declare_scanner_communication_variables])[]b4_push_if([[ 1403 1404 struct yypstate 1405 {]b4_declare_parser_state_variables[ 1406 /* Used to determine if this is the first time this instance has 1407 been used. */ 1408 int yynew; 1409 };]b4_pure_if([], [[ 1410 1411 static char yypstate_allocated = 0;]])b4_pull_if([ 1412 1413 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ 1414 { 1415 return yypull_parse (YY_NULL]m4_ifset([b4_parse_param], 1416 [[, ]b4_c_args(b4_parse_param)])[); 1417 } 1418 1419 ]b4_c_function_def([[yypull_parse]], [[int]], 1420 [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [, 1421 b4_parse_param]))[ 1422 { 1423 int yystatus; 1424 yypstate *yyps_local;]b4_pure_if([[ 1425 int yychar; 1426 YYSTYPE yylval;]b4_locations_if([[ 1427 static YYLTYPE yyloc_default][]b4_yyloc_default[; 1428 YYLTYPE yylloc = yyloc_default;]])])[ 1429 if (yyps) 1430 yyps_local = yyps; 1431 else 1432 { 1433 yyps_local = yypstate_new (); 1434 if (!yyps_local) 1435 {]b4_pure_if([[ 1436 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[ 1437 if (!yypstate_allocated) 1438 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[ 1439 return 2; 1440 } 1441 } 1442 do { 1443 yychar = YYLEX; 1444 yystatus = 1445 yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[); 1446 } while (yystatus == YYPUSH_MORE); 1447 if (!yyps) 1448 yypstate_delete (yyps_local); 1449 return yystatus; 1450 }]])[ 1451 1452 /* Initialize the parser data structure. */ 1453 ]b4_c_function_def([[yypstate_new]], [[yypstate *]])[ 1454 { 1455 yypstate *yyps;]b4_pure_if([], [[ 1456 if (yypstate_allocated) 1457 return YY_NULL;]])[ 1458 yyps = (yypstate *) malloc (sizeof *yyps); 1459 if (!yyps) 1460 return YY_NULL; 1461 yyps->yynew = 1;]b4_pure_if([], [[ 1462 yypstate_allocated = 1;]])[ 1463 return yyps; 1464 } 1465 1466 ]b4_c_function_def([[yypstate_delete]], [[void]], 1467 [[[yypstate *yyps]], [[yyps]]])[ 1468 { 1469 #ifndef yyoverflow 1470 /* If the stack was reallocated but the parse did not complete, then the 1471 stack still needs to be freed. */ 1472 if (!yyps->yynew && yyps->yyss != yyps->yyssa) 1473 YYSTACK_FREE (yyps->yyss); 1474 #endif]b4_lac_if([[ 1475 if (!yyps->yynew && yyps->yyes != yyps->yyesa) 1476 YYSTACK_FREE (yyps->yyes);]])[ 1477 free (yyps);]b4_pure_if([], [[ 1478 yypstate_allocated = 0;]])[ 1479 } 1480 ]b4_pure_if([[ 1481 #define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[ 1482 #define yystate yyps->yystate 1483 #define yyerrstatus yyps->yyerrstatus 1484 #define yyssa yyps->yyssa 1485 #define yyss yyps->yyss 1486 #define yyssp yyps->yyssp 1487 #define yyvsa yyps->yyvsa 1488 #define yyvs yyps->yyvs 1489 #define yyvsp yyps->yyvsp]b4_locations_if([[ 1490 #define yylsa yyps->yylsa 1491 #define yyls yyps->yyls 1492 #define yylsp yyps->yylsp 1493 #define yyerror_range yyps->yyerror_range]])[ 1494 #define yystacksize yyps->yystacksize]b4_lac_if([[ 1495 #define yyesa yyps->yyesa 1496 #define yyes yyps->yyes 1497 #define yyes_capacity yyps->yyes_capacity]])[ 1498 1499 1500 /*---------------. 1501 | yypush_parse. | 1502 `---------------*/ 1503 1504 ]b4_c_function_def([[yypush_parse]], [[int]], 1505 [[[yypstate *yyps]], [[yyps]]]b4_pure_if([, 1506 [[[int yypushed_char]], [[yypushed_char]]], 1507 [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([, 1508 [[[YYLTYPE *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [, 1509 b4_parse_param]))], [[ 1510 1511 1512 /*----------. 1513 | yyparse. | 1514 `----------*/ 1515 1516 #ifdef YYPARSE_PARAM 1517 ]b4_c_function_def([yyparse], [int], 1518 [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[ 1519 #else /* ! YYPARSE_PARAM */ 1520 ]b4_c_function_def([yyparse], [int], b4_parse_param)[ 1521 #endif]])[ 1522 {]b4_pure_if([b4_declare_scanner_communication_variables 1523 ])b4_push_if([b4_pure_if([], [[ 1524 int yypushed_char = yychar; 1525 YYSTYPE yypushed_val = yylval;]b4_locations_if([[ 1526 YYLTYPE yypushed_loc = yylloc;]]) 1527 ])], 1528 [b4_declare_parser_state_variables 1529 ])b4_lac_if([[ 1530 int yy_lac_established = 0;]])[ 1531 int yyn; 1532 int yyresult; 1533 /* Lookahead token as an internal (translated) token number. */ 1534 int yytoken = 0; 1535 /* The variables used to return semantic value and location from the 1536 action routines. */ 1537 YYSTYPE yyval;]b4_locations_if([[ 1538 YYLTYPE yyloc;]])[ 1539 1540 #if YYERROR_VERBOSE 1541 /* Buffer for error messages, and its allocated size. */ 1542 char yymsgbuf[128]; 1543 char *yymsg = yymsgbuf; 1544 YYSIZE_T yymsg_alloc = sizeof yymsgbuf; 1545 #endif 1546 1547 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[) 1548 1549 /* The number of symbols on the RHS of the reduced rule. 1550 Keep to zero when no symbol should be popped. */ 1551 int yylen = 0;]b4_push_if([[ 1552 1553 if (!yyps->yynew) 1554 { 1555 yyn = yypact[yystate]; 1556 goto yyread_pushed_token; 1557 }]])[ 1558 1559 yyssp = yyss = yyssa; 1560 yyvsp = yyvs = yyvsa;]b4_locations_if([[ 1561 yylsp = yyls = yylsa;]])[ 1562 yystacksize = YYINITDEPTH;]b4_lac_if([[ 1563 1564 yyes = yyesa; 1565 yyes_capacity = sizeof yyesa / sizeof *yyes; 1566 if (YYMAXDEPTH < yyes_capacity) 1567 yyes_capacity = YYMAXDEPTH;]])[ 1568 1569 YYDPRINTF ((stderr, "Starting parse\n")); 1570 1571 yystate = 0; 1572 yyerrstatus = 0; 1573 yynerrs = 0; 1574 yychar = YYEMPTY; /* Cause a token to be read. */ 1575 ]m4_ifdef([b4_initial_action], [ 1576 b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [], 1577 [b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl 1578 /* User initialization code. */ 1579 b4_user_initial_action 1580 b4_dollar_popdef[]dnl 1581 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval; 1582 ]])])dnl 1583 b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[; 1584 ]])dnl 1585 [ goto yysetstate; 1586 1587 /*------------------------------------------------------------. 1588 | yynewstate -- Push a new state, which is found in yystate. | 1589 `------------------------------------------------------------*/ 1590 yynewstate: 1591 /* In all cases, when you get here, the value and location stacks 1592 have just been pushed. So pushing a state here evens the stacks. */ 1593 yyssp++; 1594 1595 yysetstate: 1596 *yyssp = yystate; 1597 1598 if (yyss + yystacksize - 1 <= yyssp) 1599 { 1600 /* Get the current used size of the three stacks, in elements. */ 1601 YYSIZE_T yysize = yyssp - yyss + 1; 1602 1603 #ifdef yyoverflow 1604 { 1605 /* Give user a chance to reallocate the stack. Use copies of 1606 these so that the &'s don't force the real ones into 1607 memory. */ 1608 YYSTYPE *yyvs1 = yyvs; 1609 yytype_int16 *yyss1 = yyss;]b4_locations_if([ 1610 YYLTYPE *yyls1 = yyls;])[ 1611 1612 /* Each stack pointer address is followed by the size of the 1613 data in use in that stack, in bytes. This used to be a 1614 conditional around just the two extra args, but that might 1615 be undefined if yyoverflow is a macro. */ 1616 yyoverflow (YY_("memory exhausted"), 1617 &yyss1, yysize * sizeof (*yyssp), 1618 &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([ 1619 &yyls1, yysize * sizeof (*yylsp),])[ 1620 &yystacksize); 1621 ]b4_locations_if([ 1622 yyls = yyls1;])[ 1623 yyss = yyss1; 1624 yyvs = yyvs1; 1625 } 1626 #else /* no yyoverflow */ 1627 # ifndef YYSTACK_RELOCATE 1628 goto yyexhaustedlab; 1629 # else 1630 /* Extend the stack our own way. */ 1631 if (YYMAXDEPTH <= yystacksize) 1632 goto yyexhaustedlab; 1633 yystacksize *= 2; 1634 if (YYMAXDEPTH < yystacksize) 1635 yystacksize = YYMAXDEPTH; 1636 1637 { 1638 yytype_int16 *yyss1 = yyss; 1639 union yyalloc *yyptr = 1640 (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize)); 1641 if (! yyptr) 1642 goto yyexhaustedlab; 1643 YYSTACK_RELOCATE (yyss_alloc, yyss); 1644 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([ 1645 YYSTACK_RELOCATE (yyls_alloc, yyls);])[ 1646 # undef YYSTACK_RELOCATE 1647 if (yyss1 != yyssa) 1648 YYSTACK_FREE (yyss1); 1649 } 1650 # endif 1651 #endif /* no yyoverflow */ 1652 1653 yyssp = yyss + yysize - 1; 1654 yyvsp = yyvs + yysize - 1;]b4_locations_if([ 1655 yylsp = yyls + yysize - 1;])[ 1656 1657 YYDPRINTF ((stderr, "Stack size increased to %lu\n", 1658 (unsigned long int) yystacksize)); 1659 1660 if (yyss + yystacksize - 1 <= yyssp) 1661 YYABORT; 1662 } 1663 1664 YYDPRINTF ((stderr, "Entering state %d\n", yystate)); 1665 1666 if (yystate == YYFINAL) 1667 YYACCEPT; 1668 1669 goto yybackup; 1670 1671 /*-----------. 1672 | yybackup. | 1673 `-----------*/ 1674 yybackup: 1675 1676 /* Do appropriate processing given the current state. Read a 1677 lookahead token if we need one and don't already have one. */ 1678 1679 /* First try to decide what to do without reference to lookahead token. */ 1680 yyn = yypact[yystate]; 1681 if (yypact_value_is_default (yyn)) 1682 goto yydefault; 1683 1684 /* Not known => get a lookahead token if don't already have one. */ 1685 1686 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */ 1687 if (yychar == YYEMPTY) 1688 {]b4_push_if([[ 1689 if (!yyps->yynew) 1690 {]b4_use_push_for_pull_if([], [[ 1691 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[ 1692 yyresult = YYPUSH_MORE; 1693 goto yypushreturn; 1694 } 1695 yyps->yynew = 0;]b4_pure_if([], [[ 1696 /* Restoring the pushed token is only necessary for the first 1697 yypush_parse invocation since subsequent invocations don't overwrite 1698 it before jumping to yyread_pushed_token. */ 1699 yychar = yypushed_char; 1700 yylval = yypushed_val;]b4_locations_if([[ 1701 yylloc = yypushed_loc;]])])[ 1702 yyread_pushed_token:]])[ 1703 YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[ 1704 yychar = yypushed_char; 1705 if (yypushed_val) 1706 yylval = *yypushed_val;]b4_locations_if([[ 1707 if (yypushed_loc) 1708 yylloc = *yypushed_loc;]])])], [[ 1709 yychar = YYLEX;]])[ 1710 } 1711 1712 if (yychar <= YYEOF) 1713 { 1714 yychar = yytoken = YYEOF; 1715 YYDPRINTF ((stderr, "Now at end of input.\n")); 1716 } 1717 else 1718 { 1719 yytoken = YYTRANSLATE (yychar); 1720 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); 1721 } 1722 1723 /* If the proper action on seeing token YYTOKEN is to reduce or to 1724 detect an error, take that action. */ 1725 yyn += yytoken; 1726 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[ 1727 { 1728 YY_LAC_ESTABLISH; 1729 goto yydefault; 1730 }]], [[ 1731 goto yydefault;]])[ 1732 yyn = yytable[yyn]; 1733 if (yyn <= 0) 1734 { 1735 if (yytable_value_is_error (yyn)) 1736 goto yyerrlab;]b4_lac_if([[ 1737 YY_LAC_ESTABLISH;]])[ 1738 yyn = -yyn; 1739 goto yyreduce; 1740 } 1741 1742 /* Count tokens shifted since error; after three, turn off error 1743 status. */ 1744 if (yyerrstatus) 1745 yyerrstatus--; 1746 1747 /* Shift the lookahead token. */ 1748 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); 1749 1750 /* Discard the shifted token. */ 1751 yychar = YYEMPTY;]b4_lac_if([[ 1752 YY_LAC_DISCARD ("shift");]])[ 1753 1754 yystate = yyn; 1755 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 1756 *++yyvsp = yylval; 1757 YY_IGNORE_MAYBE_UNINITIALIZED_END 1758 ]b4_locations_if([ *++yylsp = yylloc;])[ 1759 goto yynewstate; 1760 1761 1762 /*-----------------------------------------------------------. 1763 | yydefault -- do the default action for the current state. | 1764 `-----------------------------------------------------------*/ 1765 yydefault: 1766 yyn = yydefact[yystate]; 1767 if (yyn == 0) 1768 goto yyerrlab; 1769 goto yyreduce; 1770 1771 1772 /*-----------------------------. 1773 | yyreduce -- Do a reduction. | 1774 `-----------------------------*/ 1775 yyreduce: 1776 /* yyn is the number of a rule to reduce with. */ 1777 yylen = yyr2[yyn]; 1778 1779 /* If YYLEN is nonzero, implement the default value of the action: 1780 `$$ = $1'. 1781 1782 Otherwise, the following line sets YYVAL to garbage. 1783 This behavior is undocumented and Bison 1784 users should not rely upon it. Assigning to YYVAL 1785 unconditionally makes the parser a bit smaller, and it avoids a 1786 GCC warning that YYVAL may be used uninitialized. */ 1787 yyval = yyvsp[1-yylen]; 1788 1789 ]b4_locations_if( 1790 [[ /* Default location. */ 1791 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[ 1792 YY_REDUCE_PRINT (yyn);]b4_lac_if([[ 1793 { 1794 int yychar_backup = yychar; 1795 switch (yyn) 1796 { 1797 ]b4_user_actions[ 1798 default: break; 1799 } 1800 if (yychar_backup != yychar) 1801 YY_LAC_DISCARD ("yychar change"); 1802 }]], [[ 1803 switch (yyn) 1804 { 1805 ]b4_user_actions[ 1806 default: break; 1807 }]])[ 1808 /* User semantic actions sometimes alter yychar, and that requires 1809 that yytoken be updated with the new translation. We take the 1810 approach of translating immediately before every use of yytoken. 1811 One alternative is translating here after every semantic action, 1812 but that translation would be missed if the semantic action invokes 1813 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or 1814 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an 1815 incorrect destructor might then be invoked immediately. In the 1816 case of YYERROR or YYBACKUP, subsequent parser actions might lead 1817 to an incorrect destructor call or verbose syntax error message 1818 before the lookahead is translated. */ 1819 YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc); 1820 1821 YYPOPSTACK (yylen); 1822 yylen = 0; 1823 YY_STACK_PRINT (yyss, yyssp); 1824 1825 *++yyvsp = yyval;]b4_locations_if([ 1826 *++yylsp = yyloc;])[ 1827 1828 /* Now `shift' the result of the reduction. Determine what state 1829 that goes to, based on the state we popped back to and the rule 1830 number reduced by. */ 1831 1832 yyn = yyr1[yyn]; 1833 1834 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp; 1835 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp) 1836 yystate = yytable[yystate]; 1837 else 1838 yystate = yydefgoto[yyn - YYNTOKENS]; 1839 1840 goto yynewstate; 1841 1842 1843 /*------------------------------------. 1844 | yyerrlab -- here on detecting error | 1845 `------------------------------------*/ 1846 yyerrlab: 1847 /* Make sure we have latest lookahead translation. See comments at 1848 user semantic actions for why this is necessary. */ 1849 yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar); 1850 1851 /* If not already recovering from an error, report this error. */ 1852 if (!yyerrstatus) 1853 { 1854 ++yynerrs; 1855 #if ! YYERROR_VERBOSE 1856 yyerror (]b4_yyerror_args[YY_("syntax error")); 1857 #else 1858 # define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[ 1859 yyesa, &yyes, &yyes_capacity, \]])[ 1860 yyssp, yytoken) 1861 { 1862 char const *yymsgp = YY_("syntax error"); 1863 int yysyntax_error_status;]b4_lac_if([[ 1864 if (yychar != YYEMPTY) 1865 YY_LAC_ESTABLISH;]])[ 1866 yysyntax_error_status = YYSYNTAX_ERROR; 1867 if (yysyntax_error_status == 0) 1868 yymsgp = yymsg; 1869 else if (yysyntax_error_status == 1) 1870 { 1871 if (yymsg != yymsgbuf) 1872 YYSTACK_FREE (yymsg); 1873 yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc); 1874 if (!yymsg) 1875 { 1876 yymsg = yymsgbuf; 1877 yymsg_alloc = sizeof yymsgbuf; 1878 yysyntax_error_status = 2; 1879 } 1880 else 1881 { 1882 yysyntax_error_status = YYSYNTAX_ERROR; 1883 yymsgp = yymsg; 1884 } 1885 } 1886 yyerror (]b4_yyerror_args[yymsgp); 1887 if (yysyntax_error_status == 2) 1888 goto yyexhaustedlab; 1889 } 1890 # undef YYSYNTAX_ERROR 1891 #endif 1892 } 1893 1894 ]b4_locations_if([[ yyerror_range[1] = yylloc;]])[ 1895 1896 if (yyerrstatus == 3) 1897 { 1898 /* If just tried and failed to reuse lookahead token after an 1899 error, discard it. */ 1900 1901 if (yychar <= YYEOF) 1902 { 1903 /* Return failure if at end of input. */ 1904 if (yychar == YYEOF) 1905 YYABORT; 1906 } 1907 else 1908 { 1909 yydestruct ("Error: discarding", 1910 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); 1911 yychar = YYEMPTY; 1912 } 1913 } 1914 1915 /* Else will try to reuse lookahead token after shifting the error 1916 token. */ 1917 goto yyerrlab1; 1918 1919 1920 /*---------------------------------------------------. 1921 | yyerrorlab -- error raised explicitly by YYERROR. | 1922 `---------------------------------------------------*/ 1923 yyerrorlab: 1924 1925 /* Pacify compilers like GCC when the user code never invokes 1926 YYERROR and the label yyerrorlab therefore never appears in user 1927 code. */ 1928 if (/*CONSTCOND*/ 0) 1929 goto yyerrorlab; 1930 1931 ]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen]; 1932 ]])[ /* Do not reclaim the symbols of the rule which action triggered 1933 this YYERROR. */ 1934 YYPOPSTACK (yylen); 1935 yylen = 0; 1936 YY_STACK_PRINT (yyss, yyssp); 1937 yystate = *yyssp; 1938 goto yyerrlab1; 1939 1940 1941 /*-------------------------------------------------------------. 1942 | yyerrlab1 -- common code for both syntax error and YYERROR. | 1943 `-------------------------------------------------------------*/ 1944 yyerrlab1: 1945 yyerrstatus = 3; /* Each real token shifted decrements this. */ 1946 1947 for (;;) 1948 { 1949 yyn = yypact[yystate]; 1950 if (!yypact_value_is_default (yyn)) 1951 { 1952 yyn += YYTERROR; 1953 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) 1954 { 1955 yyn = yytable[yyn]; 1956 if (0 < yyn) 1957 break; 1958 } 1959 } 1960 1961 /* Pop the current state because it cannot handle the error token. */ 1962 if (yyssp == yyss) 1963 YYABORT; 1964 1965 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[ 1966 yydestruct ("Error: popping", 1967 yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); 1968 YYPOPSTACK (1); 1969 yystate = *yyssp; 1970 YY_STACK_PRINT (yyss, yyssp); 1971 }]b4_lac_if([[ 1972 1973 /* If the stack popping above didn't lose the initial context for the 1974 current lookahead token, the shift below will for sure. */ 1975 YY_LAC_DISCARD ("error recovery");]])[ 1976 1977 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 1978 *++yyvsp = yylval; 1979 YY_IGNORE_MAYBE_UNINITIALIZED_END 1980 ]b4_locations_if([[ 1981 yyerror_range[2] = yylloc; 1982 /* Using YYLLOC is tempting, but would change the location of 1983 the lookahead. YYLOC is available though. */ 1984 YYLLOC_DEFAULT (yyloc, yyerror_range, 2); 1985 *++yylsp = yyloc;]])[ 1986 1987 /* Shift the error token. */ 1988 YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp); 1989 1990 yystate = yyn; 1991 goto yynewstate; 1992 1993 1994 /*-------------------------------------. 1995 | yyacceptlab -- YYACCEPT comes here. | 1996 `-------------------------------------*/ 1997 yyacceptlab: 1998 yyresult = 0; 1999 goto yyreturn; 2000 2001 /*-----------------------------------. 2002 | yyabortlab -- YYABORT comes here. | 2003 `-----------------------------------*/ 2004 yyabortlab: 2005 yyresult = 1; 2006 goto yyreturn; 2007 2008 #if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[ 2009 /*-------------------------------------------------. 2010 | yyexhaustedlab -- memory exhaustion comes here. | 2011 `-------------------------------------------------*/ 2012 yyexhaustedlab: 2013 yyerror (]b4_yyerror_args[YY_("memory exhausted")); 2014 yyresult = 2; 2015 /* Fall through. */ 2016 #endif 2017 2018 yyreturn: 2019 if (yychar != YYEMPTY) 2020 { 2021 /* Make sure we have latest lookahead translation. See comments at 2022 user semantic actions for why this is necessary. */ 2023 yytoken = YYTRANSLATE (yychar); 2024 yydestruct ("Cleanup: discarding lookahead", 2025 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); 2026 } 2027 /* Do not reclaim the symbols of the rule which action triggered 2028 this YYABORT or YYACCEPT. */ 2029 YYPOPSTACK (yylen); 2030 YY_STACK_PRINT (yyss, yyssp); 2031 while (yyssp != yyss) 2032 { 2033 yydestruct ("Cleanup: popping", 2034 yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); 2035 YYPOPSTACK (1); 2036 } 2037 #ifndef yyoverflow 2038 if (yyss != yyssa) 2039 YYSTACK_FREE (yyss); 2040 #endif]b4_lac_if([[ 2041 if (yyes != yyesa) 2042 YYSTACK_FREE (yyes);]])b4_push_if([[ 2043 yyps->yynew = 1; 2044 2045 yypushreturn:]])[ 2046 #if YYERROR_VERBOSE 2047 if (yymsg != yymsgbuf) 2048 YYSTACK_FREE (yymsg); 2049 #endif 2050 /* Make sure YYID is used. */ 2051 return YYID (yyresult); 2052 } 2053 2054 2055 ]b4_epilogue[]dnl 2056 b4_output_end() 2057 2058 b4_defines_if( 2059 [b4_output_begin([b4_spec_defines_file])[ 2060 ]b4_copyright([Bison interface for Yacc-like parsers in C], 2061 [1984, 1989-1990, 2000-2012])[ 2062 2063 ]b4_shared_declarations[ 2064 ]b4_output_end() 2065 ]) 2066