1 # -*- C -*- 2 # Yacc compatible skeleton for Bison 3 4 # Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2021 Free Software 5 # Foundation, Inc. 6 7 m4_pushdef([b4_copyright_years], 8 [1984, 1989-1990, 2000-2015, 2018-2021]) 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 <https://www.gnu.org/licenses/>. 22 23 m4_include(b4_skeletonsdir/[c.m4]) 24 25 26 ## ---------- ## 27 ## api.pure. ## 28 ## ---------- ## 29 30 b4_percent_define_default([[api.pure]], [[false]]) 31 b4_percent_define_check_values([[[[api.pure]], 32 [[false]], [[true]], [[]], [[full]]]]) 33 34 m4_define([b4_pure_flag], [[0]]) 35 m4_case(b4_percent_define_get([[api.pure]]), 36 [false], [m4_define([b4_pure_flag], [[0]])], 37 [true], [m4_define([b4_pure_flag], [[1]])], 38 [], [m4_define([b4_pure_flag], [[1]])], 39 [full], [m4_define([b4_pure_flag], [[2]])]) 40 41 m4_define([b4_pure_if], 42 [m4_case(b4_pure_flag, 43 [0], [$2], 44 [1], [$1], 45 [2], [$1])]) 46 [m4_fatal([invalid api.pure value: ]$1)])]) 47 48 ## --------------- ## 49 ## api.push-pull. ## 50 ## --------------- ## 51 52 # b4_pull_if, b4_push_if 53 # ---------------------- 54 # Whether the pull/push APIs are needed. Both can be enabled. 55 56 b4_percent_define_default([[api.push-pull]], [[pull]]) 57 b4_percent_define_check_values([[[[api.push-pull]], 58 [[pull]], [[push]], [[both]]]]) 59 b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]]) 60 b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]]) 61 m4_case(b4_percent_define_get([[api.push-pull]]), 62 [pull], [m4_define([b4_push_flag], [[0]])], 63 [push], [m4_define([b4_pull_flag], [[0]])]) 64 65 # Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing 66 # tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the 67 # behavior of Bison at all when push parsing is already requested. 68 b4_define_flag_if([use_push_for_pull]) 69 b4_use_push_for_pull_if([ 70 b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])], 71 [m4_define([b4_push_flag], [[1]])])]) 72 73 ## ----------- ## 74 ## parse.lac. ## 75 ## ----------- ## 76 77 b4_percent_define_default([[parse.lac]], [[none]]) 78 b4_percent_define_default([[parse.lac.es-capacity-initial]], [[20]]) 79 b4_percent_define_default([[parse.lac.memory-trace]], [[failures]]) 80 b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]], 81 [[[[parse.lac.memory-trace]], 82 [[failures]], [[full]]]]) 83 b4_define_flag_if([lac]) 84 m4_define([b4_lac_flag], 85 [m4_if(b4_percent_define_get([[parse.lac]]), 86 [none], [[0]], [[1]])]) 87 88 ## ---------------- ## 89 ## Default values. ## 90 ## ---------------- ## 91 92 # Stack parameters. 93 m4_define_default([b4_stack_depth_max], [10000]) 94 m4_define_default([b4_stack_depth_init], [200]) 95 96 97 # b4_yyerror_arg_loc_if(ARG) 98 # -------------------------- 99 # Expand ARG iff yyerror is to be given a location as argument. 100 m4_define([b4_yyerror_arg_loc_if], 101 [b4_locations_if([m4_case(b4_pure_flag, 102 [1], [m4_ifset([b4_parse_param], [$1])], 103 [2], [$1])])]) 104 105 # b4_yyerror_formals 106 # ------------------ 107 m4_define([b4_yyerror_formals], 108 [b4_pure_if([b4_locations_if([, [[const ]b4_api_PREFIX[LTYPE *yyllocp], [&yylloc]]])[]dnl 109 m4_ifdef([b4_parse_param], [, b4_parse_param])[]dnl 110 ,])dnl 111 [[const char *msg], [msg]]]) 112 113 114 115 # b4_yyerror_args 116 # --------------- 117 # Arguments passed to yyerror: user args plus yylloc. 118 m4_define([b4_yyerror_args], 119 [b4_yyerror_arg_loc_if([&yylloc, ])dnl 120 m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])]) 121 122 123 124 ## ----------------- ## 125 ## Semantic Values. ## 126 ## ----------------- ## 127 128 129 # b4_accept([SYMBOL-NUM]) 130 # ----------------------- 131 # Used in actions of the rules of accept, the initial symbol, to call 132 # YYACCEPT. If SYMBOL-NUM is specified, run "yyvalue->SLOT = $2;" 133 # before, using the slot of SYMBOL-NUM. 134 m4_define([b4_accept], 135 [m4_ifval([$1], 136 [b4_symbol_value(yyimpl->yyvalue, [$1]) = b4_rhs_value(2, 1, [$1]); ]) YYACCEPT]) 137 138 139 # b4_lhs_value(SYMBOL-NUM, [TYPE]) 140 # -------------------------------- 141 # See README. 142 m4_define([b4_lhs_value], 143 [b4_symbol_value(yyval, [$1], [$2])]) 144 145 146 # b4_rhs_value(RULE-LENGTH, POS, [SYMBOL-NUM], [TYPE]) 147 # ---------------------------------------------------- 148 # See README. 149 m4_define([b4_rhs_value], 150 [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3], [$4])]) 151 152 153 ## ----------- ## 154 ## Locations. ## 155 ## ----------- ## 156 157 # b4_lhs_location() 158 # ----------------- 159 # Expansion of @$. 160 # Overparenthetized to avoid obscure problems with "foo$$bar = foo$1bar". 161 m4_define([b4_lhs_location], 162 [(yyloc)]) 163 164 165 # b4_rhs_location(RULE-LENGTH, POS) 166 # --------------------------------- 167 # Expansion of @POS, where the current rule has RULE-LENGTH symbols 168 # on RHS. 169 # Overparenthetized to avoid obscure problems with "foo$$bar = foo$1bar". 170 m4_define([b4_rhs_location], 171 [(yylsp@{b4_subtract([$2], [$1])@})]) 172 173 174 ## -------------- ## 175 ## Declarations. ## 176 ## -------------- ## 177 178 # _b4_declare_sub_yyparse(START-SYMBOL-NUM, SWITCHING-TOKEN-SYMBOL-NUM) 179 # --------------------------------------------------------------------- 180 # Define the return type of the parsing function for SYMBOL-NUM, and 181 # declare its parsing function. 182 m4_define([_b4_declare_sub_yyparse], 183 [[ 184 // Return type when parsing one ]_b4_symbol($1, tag)[. 185 typedef struct 186 {]b4_symbol_if([$1], [has_type], [[ 187 ]_b4_symbol($1, type)[ yyvalue;]])[ 188 int yystatus; 189 int yynerrs; 190 } ]b4_prefix[parse_]_b4_symbol($1, id)[_t; 191 192 // Parse one ]_b4_symbol($1, tag)[. 193 ]b4_prefix[parse_]_b4_symbol($1, id)[_t ]b4_prefix[parse_]_b4_symbol($1, id)[ (]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param)], [void])[); 194 ]]) 195 196 197 # _b4_first_switching_token 198 # ------------------------- 199 m4_define([b4_first], [$1]) 200 m4_define([b4_second], [$2]) 201 m4_define([_b4_first_switching_token], 202 [b4_second(b4_first(b4_start_symbols))]) 203 204 205 # _b4_define_sub_yyparse(START-SYMBOL-NUM, SWITCHING-TOKEN-SYMBOL-NUM) 206 # -------------------------------------------------------------------- 207 # Define the parsing function for START-SYMBOL-NUM. 208 m4_define([_b4_define_sub_yyparse], 209 [[ 210 ]b4_prefix[parse_]_b4_symbol($1, id)[_t 211 ]b4_prefix[parse_]_b4_symbol($1, id)[ (]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param)], [void])[) 212 { 213 ]b4_prefix[parse_]_b4_symbol($1, id)[_t yyres; 214 yy_parse_impl_t yyimpl; 215 yyres.yystatus = yy_parse_impl (]b4_symbol($2, id)[, &yyimpl]m4_ifset([b4_parse_param], 216 [[, ]b4_args(b4_parse_param)])[);]b4_symbol_if([$1], [has_type], [[ 217 yyres.yyvalue = yyimpl.yyvalue.]b4_symbol($1, slot)[;]])[ 218 yyres.yynerrs = yyimpl.yynerrs; 219 return yyres; 220 } 221 ]]) 222 223 224 # b4_declare_scanner_communication_variables 225 # ------------------------------------------ 226 # Declare the variables that are global, or local to YYPARSE if 227 # pure-parser. 228 m4_define([b4_declare_scanner_communication_variables], [[ 229 ]m4_ifdef([b4_start_symbols], [], 230 [[/* Lookahead token kind. */ 231 int yychar; 232 ]])[ 233 ]b4_pure_if([[ 234 /* The semantic value of the lookahead symbol. */ 235 /* Default value used for initialization, for pacifying older GCCs 236 or non-GCC compilers. */ 237 YY_INITIAL_VALUE (static YYSTYPE yyval_default;) 238 YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);]b4_locations_if([[ 239 240 /* Location data for the lookahead symbol. */ 241 static YYLTYPE yyloc_default]b4_yyloc_default[; 242 YYLTYPE yylloc = yyloc_default;]])], 243 [[/* The semantic value of the lookahead symbol. */ 244 YYSTYPE yylval;]b4_locations_if([[ 245 /* Location data for the lookahead symbol. */ 246 YYLTYPE yylloc]b4_yyloc_default[;]])[ 247 /* Number of syntax errors so far. */ 248 int yynerrs;]])]) 249 250 251 # b4_declare_parser_state_variables([INIT]) 252 # ----------------------------------------- 253 # Declare all the variables that are needed to maintain the parser state 254 # between calls to yypush_parse. 255 # If INIT is non-null, initialize these variables. 256 m4_define([b4_declare_parser_state_variables], 257 [b4_pure_if([[ 258 /* Number of syntax errors so far. */ 259 int yynerrs]m4_ifval([$1], [ = 0])[; 260 ]])[ 261 yy_state_fast_t yystate]m4_ifval([$1], [ = 0])[; 262 /* Number of tokens to shift before error messages enabled. */ 263 int yyerrstatus]m4_ifval([$1], [ = 0])[; 264 265 /* Refer to the stacks through separate pointers, to allow yyoverflow 266 to reallocate them elsewhere. */ 267 268 /* Their size. */ 269 YYPTRDIFF_T yystacksize]m4_ifval([$1], [ = YYINITDEPTH])[; 270 271 /* The state stack: array, bottom, top. */ 272 yy_state_t yyssa[YYINITDEPTH]; 273 yy_state_t *yyss]m4_ifval([$1], [ = yyssa])[; 274 yy_state_t *yyssp]m4_ifval([$1], [ = yyss])[; 275 276 /* The semantic value stack: array, bottom, top. */ 277 YYSTYPE yyvsa[YYINITDEPTH]; 278 YYSTYPE *yyvs]m4_ifval([$1], [ = yyvsa])[; 279 YYSTYPE *yyvsp]m4_ifval([$1], [ = yyvs])[;]b4_locations_if([[ 280 281 /* The location stack: array, bottom, top. */ 282 YYLTYPE yylsa[YYINITDEPTH]; 283 YYLTYPE *yyls]m4_ifval([$1], [ = yylsa])[; 284 YYLTYPE *yylsp]m4_ifval([$1], [ = yyls])[;]])[]b4_lac_if([[ 285 286 yy_state_t yyesa@{]b4_percent_define_get([[parse.lac.es-capacity-initial]])[@}; 287 yy_state_t *yyes]m4_ifval([$1], [ = yyesa])[; 288 YYPTRDIFF_T yyes_capacity][]m4_ifval([$1], 289 [m4_do([ = b4_percent_define_get([[parse.lac.es-capacity-initial]]) < YYMAXDEPTH], 290 [ ? b4_percent_define_get([[parse.lac.es-capacity-initial]])], 291 [ : YYMAXDEPTH])])[;]])]) 292 293 294 m4_define([b4_macro_define], 295 [[#]define $1 $2]) 296 297 m4_define([b4_macro_undef], 298 [[#]undef $1]) 299 300 m4_define([b4_pstate_macro_define], 301 [b4_macro_define([$1], [yyps->$1])]) 302 303 # b4_parse_state_variable_macros(b4_macro_define|b4_macro_undef) 304 # -------------------------------------------------------------- 305 m4_define([b4_parse_state_variable_macros], 306 [b4_pure_if([$1([b4_prefix[]nerrs])]) 307 $1([yystate]) 308 $1([yyerrstatus]) 309 $1([yyssa]) 310 $1([yyss]) 311 $1([yyssp]) 312 $1([yyvsa]) 313 $1([yyvs]) 314 $1([yyvsp])[]b4_locations_if([ 315 $1([yylsa]) 316 $1([yyls]) 317 $1([yylsp])]) 318 $1([yystacksize])[]b4_lac_if([ 319 $1([yyesa]) 320 $1([yyes]) 321 $1([yyes_capacity])])]) 322 323 324 325 326 # _b4_declare_yyparse_push 327 # ------------------------ 328 # Declaration of yyparse (and dependencies) when using the push parser 329 # (including in pull mode). 330 m4_define([_b4_declare_yyparse_push], 331 [[#ifndef YYPUSH_MORE_DEFINED 332 # define YYPUSH_MORE_DEFINED 333 enum { YYPUSH_MORE = 4 }; 334 #endif 335 336 typedef struct ]b4_prefix[pstate ]b4_prefix[pstate; 337 338 ]b4_pull_if([[ 339 int ]b4_prefix[parse (]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param)], [void])[);]])[ 340 int ]b4_prefix[push_parse (]b4_prefix[pstate *ps]b4_pure_if([[, 341 int pushed_char, ]b4_api_PREFIX[STYPE const *pushed_val]b4_locations_if([[, ]b4_api_PREFIX[LTYPE *pushed_loc]])])b4_user_formals[); 342 ]b4_pull_if([[int ]b4_prefix[pull_parse (]b4_prefix[pstate *ps]b4_user_formals[);]])[ 343 ]b4_prefix[pstate *]b4_prefix[pstate_new (void); 344 void ]b4_prefix[pstate_delete (]b4_prefix[pstate *ps); 345 ]]) 346 347 348 # _b4_declare_yyparse 349 # ------------------- 350 # When not the push parser. 351 m4_define([_b4_declare_yyparse], 352 [[int ]b4_prefix[parse (]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param)], [void])[); 353 ]m4_ifdef([b4_start_symbols], 354 [m4_map([_b4_declare_sub_yyparse], m4_defn([b4_start_symbols]))])]) 355 356 357 # b4_declare_yyparse 358 # ------------------ 359 m4_define([b4_declare_yyparse], 360 [b4_push_if([_b4_declare_yyparse_push], 361 [_b4_declare_yyparse])[]dnl 362 ]) 363 364 365 # b4_declare_yyerror_and_yylex 366 # ---------------------------- 367 # Comply with POSIX Yacc. 368 # <https://austingroupbugs.net/view.php?id=1388#c5220> 369 m4_define([b4_declare_yyerror_and_yylex], 370 [b4_posix_if([[#if !defined ]b4_prefix[error && !defined ]b4_api_PREFIX[ERROR_IS_DECLARED 371 ]b4_function_declare([b4_prefix[error]], void, b4_yyerror_formals)[ 372 #endif 373 #if !defined ]b4_prefix[lex && !defined ]b4_api_PREFIX[LEX_IS_DECLARED 374 ]b4_function_declare([b4_prefix[lex]], int, b4_yylex_formals)[ 375 #endif 376 ]])dnl 377 ]) 378 379 380 # b4_shared_declarations 381 # ---------------------- 382 # Declarations that might either go into the header (if --header) 383 # or into the implementation file. 384 m4_define([b4_shared_declarations], 385 [b4_cpp_guard_open([b4_spec_mapped_header_file])[ 386 ]b4_declare_yydebug[ 387 ]b4_percent_code_get([[requires]])[ 388 ]b4_token_enums_defines[ 389 ]b4_declare_yylstype[ 390 ]b4_declare_yyerror_and_yylex[ 391 ]b4_declare_yyparse[ 392 ]b4_percent_code_get([[provides]])[ 393 ]b4_cpp_guard_close([b4_spec_mapped_header_file])[]dnl 394 ]) 395 396 397 # b4_header_include_if(IF-TRUE, IF-FALSE) 398 # --------------------------------------- 399 # Run IF-TRUE if we generate an output file and api.header.include 400 # is defined. 401 m4_define([b4_header_include_if], 402 [m4_ifval(m4_quote(b4_spec_header_file), 403 [b4_percent_define_ifdef([[api.header.include]], 404 [$1], 405 [$2])], 406 [$2])]) 407 408 m4_if(b4_spec_header_file, [y.tab.h], [], 409 [b4_percent_define_default([[api.header.include]], 410 [["@basename(]b4_spec_header_file[@)"]])]) 411 412 413 414 415 ## -------------- ## 416 ## Output files. ## 417 ## -------------- ## 418 419 420 b4_header_if([[ 421 ]b4_output_begin([b4_spec_header_file])[ 422 ]b4_copyright([Bison interface for Yacc-like parsers in C])[ 423 ]b4_disclaimer[ 424 ]b4_shared_declarations[ 425 ]b4_output_end[ 426 ]])# b4_header_if 427 428 b4_output_begin([b4_parser_file_name])[ 429 ]b4_copyright([Bison implementation for Yacc-like parsers in C])[ 430 /* C LALR(1) parser skeleton written by Richard Stallman, by 431 simplifying the original so-called "semantic" parser. */ 432 433 ]b4_disclaimer[ 434 /* All symbols defined below should begin with yy or YY, to avoid 435 infringing on user name space. This should be done even for local 436 variables, as they might otherwise be expanded by user macros. 437 There are some unavoidable exceptions within include files to 438 define necessary library symbols; they are noted "INFRINGES ON 439 USER NAME SPACE" below. */ 440 441 ]b4_identification[ 442 ]b4_percent_code_get([[top]])[]dnl 443 m4_if(b4_api_prefix, [yy], [], 444 [[/* Substitute the type names. */ 445 #define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[ 446 #define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[ 447 ]m4_if(b4_prefix, [yy], [], 448 [[/* Substitute the variable and function names. */]b4_pull_if([[ 449 #define yyparse ]b4_prefix[parse]])b4_push_if([[ 450 #define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[ 451 #define yypull_parse ]b4_prefix[pull_parse]])[ 452 #define yypstate_new ]b4_prefix[pstate_new 453 #define yypstate_clear ]b4_prefix[pstate_clear 454 #define yypstate_delete ]b4_prefix[pstate_delete 455 #define yypstate ]b4_prefix[pstate]])[ 456 #define yylex ]b4_prefix[lex 457 #define yyerror ]b4_prefix[error 458 #define yydebug ]b4_prefix[debug 459 #define yynerrs ]b4_prefix[nerrs]]b4_pure_if([], [[ 460 #define yylval ]b4_prefix[lval 461 #define yychar ]b4_prefix[char]b4_locations_if([[ 462 #define yylloc ]b4_prefix[lloc]])]))[ 463 464 ]b4_user_pre_prologue[ 465 ]b4_cast_define[ 466 ]b4_null_define[ 467 468 ]b4_header_include_if([[#include ]b4_percent_define_get([[api.header.include]])], 469 [m4_ifval(m4_quote(b4_spec_header_file), 470 [/* Use api.header.include to #include this header 471 instead of duplicating it here. */ 472 ])b4_shared_declarations])[ 473 ]b4_declare_symbol_enum[ 474 475 ]b4_user_post_prologue[ 476 ]b4_percent_code_get[ 477 ]b4_c99_int_type_define[ 478 479 ]b4_sizes_types_define[ 480 481 /* Stored state numbers (used for stacks). */ 482 typedef ]b4_int_type(0, m4_eval(b4_states_number - 1))[ yy_state_t; 483 484 /* State numbers in computations. */ 485 typedef int yy_state_fast_t; 486 487 #ifndef YY_ 488 # if defined YYENABLE_NLS && YYENABLE_NLS 489 # if ENABLE_NLS 490 # include <libintl.h> /* INFRINGES ON USER NAME SPACE */ 491 # define YY_(Msgid) dgettext ("bison-runtime", Msgid) 492 # endif 493 # endif 494 # ifndef YY_ 495 # define YY_(Msgid) Msgid 496 # endif 497 #endif 498 ]b4_has_translations_if([ 499 #ifndef N_ 500 # define N_(Msgid) Msgid 501 #endif 502 ])[ 503 504 ]b4_attribute_define[ 505 506 ]b4_parse_assert_if([[#ifdef NDEBUG 507 # define YY_ASSERT(E) ((void) (0 && (E))) 508 #else 509 # include <assert.h> /* INFRINGES ON USER NAME SPACE */ 510 # define YY_ASSERT(E) assert (E) 511 #endif 512 ]], 513 [[#define YY_ASSERT(E) ((void) (0 && (E)))]])[ 514 515 #if ]b4_lac_if([[1]], [b4_parse_error_case([simple], [[!defined yyoverflow]], [[1]])])[ 516 517 /* The parser invokes alloca or malloc; define the necessary symbols. */]dnl 518 b4_push_if([], [b4_lac_if([], [[ 519 520 # ifdef YYSTACK_USE_ALLOCA 521 # if YYSTACK_USE_ALLOCA 522 # ifdef __GNUC__ 523 # define YYSTACK_ALLOC __builtin_alloca 524 # elif defined __BUILTIN_VA_ARG_INCR 525 # include <alloca.h> /* INFRINGES ON USER NAME SPACE */ 526 # elif defined _AIX 527 # define YYSTACK_ALLOC __alloca 528 # elif defined _MSC_VER 529 # include <malloc.h> /* INFRINGES ON USER NAME SPACE */ 530 # define alloca _alloca 531 # else 532 # define YYSTACK_ALLOC alloca 533 # if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS 534 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */ 535 /* Use EXIT_SUCCESS as a witness for stdlib.h. */ 536 # ifndef EXIT_SUCCESS 537 # define EXIT_SUCCESS 0 538 # endif 539 # endif 540 # endif 541 # endif 542 # endif]])])[ 543 544 # ifdef YYSTACK_ALLOC 545 /* Pacify GCC's 'empty if-body' warning. */ 546 # define YYSTACK_FREE(Ptr) do { /* empty */; } while (0) 547 # ifndef YYSTACK_ALLOC_MAXIMUM 548 /* The OS might guarantee only one guard page at the bottom of the stack, 549 and a page size can be as small as 4096 bytes. So we cannot safely 550 invoke alloca (N) if N exceeds 4096. Use a slightly smaller number 551 to allow for a few compiler-allocated temporary stack slots. */ 552 # define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */ 553 # endif 554 # else 555 # define YYSTACK_ALLOC YYMALLOC 556 # define YYSTACK_FREE YYFREE 557 # ifndef YYSTACK_ALLOC_MAXIMUM 558 # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM 559 # endif 560 # if (defined __cplusplus && ! defined EXIT_SUCCESS \ 561 && ! ((defined YYMALLOC || defined malloc) \ 562 && (defined YYFREE || defined free))) 563 # include <stdlib.h> /* INFRINGES ON USER NAME SPACE */ 564 # ifndef EXIT_SUCCESS 565 # define EXIT_SUCCESS 0 566 # endif 567 # endif 568 # ifndef YYMALLOC 569 # define YYMALLOC malloc 570 # if ! defined malloc && ! defined EXIT_SUCCESS 571 void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */ 572 # endif 573 # endif 574 # ifndef YYFREE 575 # define YYFREE free 576 # if ! defined free && ! defined EXIT_SUCCESS 577 void free (void *); /* INFRINGES ON USER NAME SPACE */ 578 # endif 579 # endif 580 # endif]b4_lac_if([[ 581 # define YYCOPY_NEEDED 1]])[ 582 #endif /* ]b4_lac_if([[1]], [b4_parse_error_case([simple], [[!defined yyoverflow]], [[1]])])[ */ 583 584 #if (! defined yyoverflow \ 585 && (! defined __cplusplus \ 586 || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \ 587 && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL))) 588 589 /* A type that is properly aligned for any stack member. */ 590 union yyalloc 591 { 592 yy_state_t yyss_alloc; 593 YYSTYPE yyvs_alloc;]b4_locations_if([ 594 YYLTYPE yyls_alloc;])[ 595 }; 596 597 /* The size of the maximum gap between one aligned stack and the next. */ 598 # define YYSTACK_GAP_MAXIMUM (YYSIZEOF (union yyalloc) - 1) 599 600 /* The size of an array large to enough to hold all stacks, each with 601 N elements. */ 602 ]b4_locations_if( 603 [# define YYSTACK_BYTES(N) \ 604 ((N) * (YYSIZEOF (yy_state_t) + YYSIZEOF (YYSTYPE) \ 605 + YYSIZEOF (YYLTYPE)) \ 606 + 2 * YYSTACK_GAP_MAXIMUM)], 607 [# define YYSTACK_BYTES(N) \ 608 ((N) * (YYSIZEOF (yy_state_t) + YYSIZEOF (YYSTYPE)) \ 609 + YYSTACK_GAP_MAXIMUM)])[ 610 611 # define YYCOPY_NEEDED 1 612 613 /* Relocate STACK from its old location to the new one. The 614 local variables YYSIZE and YYSTACKSIZE give the old and new number of 615 elements in the stack, and YYPTR gives the new location of the 616 stack. Advance YYPTR to a properly aligned location for the next 617 stack. */ 618 # define YYSTACK_RELOCATE(Stack_alloc, Stack) \ 619 do \ 620 { \ 621 YYPTRDIFF_T yynewbytes; \ 622 YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \ 623 Stack = &yyptr->Stack_alloc; \ 624 yynewbytes = yystacksize * YYSIZEOF (*Stack) + YYSTACK_GAP_MAXIMUM; \ 625 yyptr += yynewbytes / YYSIZEOF (*yyptr); \ 626 } \ 627 while (0) 628 629 #endif 630 631 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED 632 /* Copy COUNT objects from SRC to DST. The source and destination do 633 not overlap. */ 634 # ifndef YYCOPY 635 # if defined __GNUC__ && 1 < __GNUC__ 636 # define YYCOPY(Dst, Src, Count) \ 637 __builtin_memcpy (Dst, Src, YY_CAST (YYSIZE_T, (Count)) * sizeof (*(Src))) 638 # else 639 # define YYCOPY(Dst, Src, Count) \ 640 do \ 641 { \ 642 YYPTRDIFF_T yyi; \ 643 for (yyi = 0; yyi < (Count); yyi++) \ 644 (Dst)[yyi] = (Src)[yyi]; \ 645 } \ 646 while (0) 647 # endif 648 # endif 649 #endif /* !YYCOPY_NEEDED */ 650 651 /* YYFINAL -- State number of the termination state. */ 652 #define YYFINAL ]b4_final_state_number[ 653 /* YYLAST -- Last index in YYTABLE. */ 654 #define YYLAST ]b4_last[ 655 656 /* YYNTOKENS -- Number of terminals. */ 657 #define YYNTOKENS ]b4_tokens_number[ 658 /* YYNNTS -- Number of nonterminals. */ 659 #define YYNNTS ]b4_nterms_number[ 660 /* YYNRULES -- Number of rules. */ 661 #define YYNRULES ]b4_rules_number[ 662 /* YYNSTATES -- Number of states. */ 663 #define YYNSTATES ]b4_states_number[ 664 665 /* YYMAXUTOK -- Last valid token kind. */ 666 #define YYMAXUTOK ]b4_code_max[ 667 668 669 /* YYTRANSLATE(TOKEN-NUM) -- Symbol number corresponding to TOKEN-NUM 670 as returned by yylex, with out-of-bounds checking. */ 671 ]b4_api_token_raw_if(dnl 672 [[#define YYTRANSLATE(YYX) YY_CAST (yysymbol_kind_t, YYX)]], 673 [[#define YYTRANSLATE(YYX) \ 674 (0 <= (YYX) && (YYX) <= YYMAXUTOK \ 675 ? YY_CAST (yysymbol_kind_t, yytranslate[YYX]) \ 676 : ]b4_symbol_prefix[YYUNDEF) 677 678 /* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM 679 as returned by yylex. */ 680 static const ]b4_int_type_for([b4_translate])[ yytranslate[] = 681 { 682 ]b4_translate[ 683 };]])[ 684 685 #if ]b4_api_PREFIX[DEBUG 686 ]b4_integral_parser_table_define([rline], [b4_rline], 687 [[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[ 688 #endif 689 690 /** Accessing symbol of state STATE. */ 691 #define YY_ACCESSING_SYMBOL(State) YY_CAST (yysymbol_kind_t, yystos[State]) 692 693 #if ]b4_parse_error_case([simple], [b4_api_PREFIX[DEBUG || ]b4_token_table_flag], [[1]])[ 694 /* The user-facing name of the symbol whose (internal) number is 695 YYSYMBOL. No bounds checking. */ 696 static const char *yysymbol_name (yysymbol_kind_t yysymbol) YY_ATTRIBUTE_UNUSED; 697 698 ]b4_parse_error_bmatch([simple\|verbose], 699 [[/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. 700 First, the terminals, then, starting at YYNTOKENS, nonterminals. */ 701 static const char *const yytname[] = 702 { 703 ]b4_tname[ 704 }; 705 706 static const char * 707 yysymbol_name (yysymbol_kind_t yysymbol) 708 { 709 return yytname[yysymbol]; 710 }]], 711 [[static const char * 712 yysymbol_name (yysymbol_kind_t yysymbol) 713 { 714 static const char *const yy_sname[] = 715 { 716 ]b4_symbol_names[ 717 };]b4_has_translations_if([[ 718 /* YYTRANSLATABLE[SYMBOL-NUM] -- Whether YY_SNAME[SYMBOL-NUM] is 719 internationalizable. */ 720 static ]b4_int_type_for([b4_translatable])[ yytranslatable[] = 721 { 722 ]b4_translatable[ 723 }; 724 return (yysymbol < YYNTOKENS && yytranslatable[yysymbol] 725 ? _(yy_sname[yysymbol]) 726 : yy_sname[yysymbol]);]], [[ 727 return yy_sname[yysymbol];]])[ 728 }]])[ 729 #endif 730 731 #define YYPACT_NINF (]b4_pact_ninf[) 732 733 #define yypact_value_is_default(Yyn) \ 734 ]b4_table_value_equals([[pact]], [[Yyn]], [b4_pact_ninf], [YYPACT_NINF])[ 735 736 #define YYTABLE_NINF (]b4_table_ninf[) 737 738 #define yytable_value_is_error(Yyn) \ 739 ]b4_table_value_equals([[table]], [[Yyn]], [b4_table_ninf], [YYTABLE_NINF])[ 740 741 ]b4_parser_tables_define[ 742 743 enum { YYENOMEM = -2 }; 744 745 #define yyerrok (yyerrstatus = 0) 746 #define yyclearin (yychar = ]b4_symbol(empty, id)[) 747 748 #define YYACCEPT goto yyacceptlab 749 #define YYABORT goto yyabortlab 750 #define YYERROR goto yyerrorlab 751 #define YYNOMEM goto yyexhaustedlab 752 753 754 #define YYRECOVERING() (!!yyerrstatus) 755 756 #define YYBACKUP(Token, Value) \ 757 do \ 758 if (yychar == ]b4_symbol(empty, id)[) \ 759 { \ 760 yychar = (Token); \ 761 yylval = (Value); \ 762 YYPOPSTACK (yylen); \ 763 yystate = *yyssp; \]b4_lac_if([[ 764 YY_LAC_DISCARD ("YYBACKUP"); \]])[ 765 goto yybackup; \ 766 } \ 767 else \ 768 { \ 769 yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \ 770 YYERROR; \ 771 } \ 772 while (0) 773 774 /* Backward compatibility with an undocumented macro. 775 Use ]b4_symbol(error, id)[ or ]b4_symbol(undef, id)[. */ 776 #define YYERRCODE ]b4_symbol(undef, id)[ 777 ]b4_locations_if([[ 778 ]b4_yylloc_default_define[ 779 #define YYRHSLOC(Rhs, K) ((Rhs)[K]) 780 ]])[ 781 782 /* Enable debugging if requested. */ 783 #if ]b4_api_PREFIX[DEBUG 784 785 # ifndef YYFPRINTF 786 # include <stdio.h> /* INFRINGES ON USER NAME SPACE */ 787 # define YYFPRINTF fprintf 788 # endif 789 790 # define YYDPRINTF(Args) \ 791 do { \ 792 if (yydebug) \ 793 YYFPRINTF Args; \ 794 } while (0) 795 796 ]b4_yylocation_print_define[ 797 798 # define YY_SYMBOL_PRINT(Title, Kind, Value, Location) \ 799 do { \ 800 if (yydebug) \ 801 { \ 802 YYFPRINTF (stderr, "%s ", Title); \ 803 yy_symbol_print (stderr, \ 804 Kind, Value]b4_locations_if([, Location])[]b4_user_args[); \ 805 YYFPRINTF (stderr, "\n"); \ 806 } \ 807 } while (0) 808 809 ]b4_yy_symbol_print_define[ 810 811 /*------------------------------------------------------------------. 812 | yy_stack_print -- Print the state stack from its BOTTOM up to its | 813 | TOP (included). | 814 `------------------------------------------------------------------*/ 815 816 static void 817 yy_stack_print (yy_state_t *yybottom, yy_state_t *yytop) 818 { 819 YYFPRINTF (stderr, "Stack now"); 820 for (; yybottom <= yytop; yybottom++) 821 { 822 int yybot = *yybottom; 823 YYFPRINTF (stderr, " %d", yybot); 824 } 825 YYFPRINTF (stderr, "\n"); 826 } 827 828 # define YY_STACK_PRINT(Bottom, Top) \ 829 do { \ 830 if (yydebug) \ 831 yy_stack_print ((Bottom), (Top)); \ 832 } while (0) 833 834 835 /*------------------------------------------------. 836 | Report that the YYRULE is going to be reduced. | 837 `------------------------------------------------*/ 838 839 static void 840 yy_reduce_print (yy_state_t *yyssp, YYSTYPE *yyvsp,]b4_locations_if([[ YYLTYPE *yylsp,]])[ 841 int yyrule]b4_user_formals[) 842 { 843 int yylno = yyrline[yyrule]; 844 int yynrhs = yyr2[yyrule]; 845 int yyi; 846 YYFPRINTF (stderr, "Reducing stack by rule %d (line %d):\n", 847 yyrule - 1, yylno); 848 /* The symbols being reduced. */ 849 for (yyi = 0; yyi < yynrhs; yyi++) 850 { 851 YYFPRINTF (stderr, " $%d = ", yyi + 1); 852 yy_symbol_print (stderr, 853 YY_ACCESSING_SYMBOL (+yyssp[yyi + 1 - yynrhs]), 854 &]b4_rhs_value(yynrhs, yyi + 1)[]b4_locations_if([, 855 &]b4_rhs_location(yynrhs, yyi + 1))[]b4_user_args[); 856 YYFPRINTF (stderr, "\n"); 857 } 858 } 859 860 # define YY_REDUCE_PRINT(Rule) \ 861 do { \ 862 if (yydebug) \ 863 yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \ 864 } while (0) 865 866 /* Nonzero means print parse trace. It is left uninitialized so that 867 multiple parsers can coexist. */ 868 int yydebug; 869 #else /* !]b4_api_PREFIX[DEBUG */ 870 # define YYDPRINTF(Args) ((void) 0) 871 # define YY_SYMBOL_PRINT(Title, Kind, Value, Location) 872 # define YY_STACK_PRINT(Bottom, Top) 873 # define YY_REDUCE_PRINT(Rule) 874 #endif /* !]b4_api_PREFIX[DEBUG */ 875 876 877 /* YYINITDEPTH -- initial size of the parser's stacks. */ 878 #ifndef YYINITDEPTH 879 # define YYINITDEPTH ]b4_stack_depth_init[ 880 #endif 881 882 /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only 883 if the built-in stack extension method is used). 884 885 Do not make this value too large; the results are undefined if 886 YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH) 887 evaluated with infinite-precision integer arithmetic. */ 888 889 #ifndef YYMAXDEPTH 890 # define YYMAXDEPTH ]b4_stack_depth_max[ 891 #endif]b4_push_if([[ 892 /* Parser data structure. */ 893 struct yypstate 894 {]b4_declare_parser_state_variables[ 895 /* Whether this instance has not started parsing yet. 896 * If 2, it corresponds to a finished parsing. */ 897 int yynew; 898 };]b4_pure_if([], [[ 899 900 /* Whether the only allowed instance of yypstate is allocated. */ 901 static char yypstate_allocated = 0;]])])[ 902 ]b4_lac_if([[ 903 904 /* Given a state stack such that *YYBOTTOM is its bottom, such that 905 *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty 906 stack, and such that *YYCAPACITY is the maximum number of elements it 907 can hold without a reallocation, make sure there is enough room to 908 store YYADD more elements. If not, allocate a new stack using 909 YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM, 910 *YYTOP, and *YYCAPACITY to reflect the new capacity and memory 911 location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack 912 using YYSTACK_FREE. Return 0 if successful or if no reallocation is 913 required. Return YYENOMEM if memory is exhausted. */ 914 static int 915 yy_lac_stack_realloc (YYPTRDIFF_T *yycapacity, YYPTRDIFF_T yyadd, 916 #if ]b4_api_PREFIX[DEBUG 917 char const *yydebug_prefix, 918 char const *yydebug_suffix, 919 #endif 920 yy_state_t **yybottom, 921 yy_state_t *yybottom_no_free, 922 yy_state_t **yytop, yy_state_t *yytop_empty) 923 { 924 YYPTRDIFF_T yysize_old = 925 *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1; 926 YYPTRDIFF_T yysize_new = yysize_old + yyadd; 927 if (*yycapacity < yysize_new) 928 { 929 YYPTRDIFF_T yyalloc = 2 * yysize_new; 930 yy_state_t *yybottom_new; 931 /* Use YYMAXDEPTH for maximum stack size given that the stack 932 should never need to grow larger than the main state stack 933 needs to grow without LAC. */ 934 if (YYMAXDEPTH < yysize_new) 935 { 936 YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix, 937 yydebug_suffix)); 938 return YYENOMEM; 939 } 940 if (YYMAXDEPTH < yyalloc) 941 yyalloc = YYMAXDEPTH; 942 yybottom_new = 943 YY_CAST (yy_state_t *, 944 YYSTACK_ALLOC (YY_CAST (YYSIZE_T, 945 yyalloc * YYSIZEOF (*yybottom_new)))); 946 if (!yybottom_new) 947 { 948 YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix, 949 yydebug_suffix)); 950 return YYENOMEM; 951 } 952 if (*yytop != yytop_empty) 953 { 954 YYCOPY (yybottom_new, *yybottom, yysize_old); 955 *yytop = yybottom_new + (yysize_old - 1); 956 } 957 if (*yybottom != yybottom_no_free) 958 YYSTACK_FREE (*yybottom); 959 *yybottom = yybottom_new; 960 *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]), 961 [full], [[ 962 YY_IGNORE_USELESS_CAST_BEGIN 963 YYDPRINTF ((stderr, "%srealloc to %ld%s", yydebug_prefix, 964 YY_CAST (long, yyalloc), yydebug_suffix)); 965 YY_IGNORE_USELESS_CAST_END]])[ 966 } 967 return 0; 968 } 969 970 /* Establish the initial context for the current lookahead if no initial 971 context is currently established. 972 973 We define a context as a snapshot of the parser stacks. We define 974 the initial context for a lookahead as the context in which the 975 parser initially examines that lookahead in order to select a 976 syntactic action. Thus, if the lookahead eventually proves 977 syntactically unacceptable (possibly in a later context reached via a 978 series of reductions), the initial context can be used to determine 979 the exact set of tokens that would be syntactically acceptable in the 980 lookahead's place. Moreover, it is the context after which any 981 further semantic actions would be erroneous because they would be 982 determined by a syntactically unacceptable token. 983 984 YY_LAC_ESTABLISH should be invoked when a reduction is about to be 985 performed in an inconsistent state (which, for the purposes of LAC, 986 includes consistent states that don't know they're consistent because 987 their default reductions have been disabled). Iff there is a 988 lookahead token, it should also be invoked before reporting a syntax 989 error. This latter case is for the sake of the debugging output. 990 991 For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as 992 follows. If no initial context is currently established for the 993 current lookahead, then check if that lookahead can eventually be 994 shifted if syntactic actions continue from the current context. 995 Report a syntax error if it cannot. */ 996 #define YY_LAC_ESTABLISH \ 997 do { \ 998 if (!yy_lac_established) \ 999 { \ 1000 YYDPRINTF ((stderr, \ 1001 "LAC: initial context established for %s\n", \ 1002 yysymbol_name (yytoken))); \ 1003 yy_lac_established = 1; \ 1004 switch (yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken)) \ 1005 { \ 1006 case YYENOMEM: \ 1007 YYNOMEM; \ 1008 case 1: \ 1009 goto yyerrlab; \ 1010 } \ 1011 } \ 1012 } while (0) 1013 1014 /* Discard any previous initial lookahead context because of Event, 1015 which may be a lookahead change or an invalidation of the currently 1016 established initial context for the current lookahead. 1017 1018 The most common example of a lookahead change is a shift. An example 1019 of both cases is syntax error recovery. That is, a syntax error 1020 occurs when the lookahead is syntactically erroneous for the 1021 currently established initial context, so error recovery manipulates 1022 the parser stacks to try to find a new initial context in which the 1023 current lookahead is syntactically acceptable. If it fails to find 1024 such a context, it discards the lookahead. */ 1025 #if ]b4_api_PREFIX[DEBUG 1026 # define YY_LAC_DISCARD(Event) \ 1027 do { \ 1028 if (yy_lac_established) \ 1029 { \ 1030 YYDPRINTF ((stderr, "LAC: initial context discarded due to " \ 1031 Event "\n")); \ 1032 yy_lac_established = 0; \ 1033 } \ 1034 } while (0) 1035 #else 1036 # define YY_LAC_DISCARD(Event) yy_lac_established = 0 1037 #endif 1038 1039 /* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can 1040 eventually (after perhaps some reductions) be shifted, return 1 if 1041 not, or return YYENOMEM if memory is exhausted. As preconditions and 1042 postconditions: *YYES_CAPACITY is the allocated size of the array to 1043 which *YYES points, and either *YYES = YYESA or *YYES points to an 1044 array allocated with YYSTACK_ALLOC. yy_lac may overwrite the 1045 contents of either array, alter *YYES and *YYES_CAPACITY, and free 1046 any old *YYES other than YYESA. */ 1047 static int 1048 yy_lac (yy_state_t *yyesa, yy_state_t **yyes, 1049 YYPTRDIFF_T *yyes_capacity, yy_state_t *yyssp, yysymbol_kind_t yytoken) 1050 { 1051 yy_state_t *yyes_prev = yyssp; 1052 yy_state_t *yyesp = yyes_prev; 1053 /* Reduce until we encounter a shift and thereby accept the token. */ 1054 YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yysymbol_name (yytoken))); 1055 if (yytoken == ]b4_symbol_prefix[YYUNDEF) 1056 { 1057 YYDPRINTF ((stderr, " Always Err\n")); 1058 return 1; 1059 } 1060 while (1) 1061 { 1062 int yyrule = yypact[+*yyesp]; 1063 if (yypact_value_is_default (yyrule) 1064 || (yyrule += yytoken) < 0 || YYLAST < yyrule 1065 || yycheck[yyrule] != yytoken) 1066 { 1067 /* Use the default action. */ 1068 yyrule = yydefact[+*yyesp]; 1069 if (yyrule == 0) 1070 { 1071 YYDPRINTF ((stderr, " Err\n")); 1072 return 1; 1073 } 1074 } 1075 else 1076 { 1077 /* Use the action from yytable. */ 1078 yyrule = yytable[yyrule]; 1079 if (yytable_value_is_error (yyrule)) 1080 { 1081 YYDPRINTF ((stderr, " Err\n")); 1082 return 1; 1083 } 1084 if (0 < yyrule) 1085 { 1086 YYDPRINTF ((stderr, " S%d\n", yyrule)); 1087 return 0; 1088 } 1089 yyrule = -yyrule; 1090 } 1091 /* By now we know we have to simulate a reduce. */ 1092 YYDPRINTF ((stderr, " R%d", yyrule - 1)); 1093 { 1094 /* Pop the corresponding number of values from the stack. */ 1095 YYPTRDIFF_T yylen = yyr2[yyrule]; 1096 /* First pop from the LAC stack as many tokens as possible. */ 1097 if (yyesp != yyes_prev) 1098 { 1099 YYPTRDIFF_T yysize = yyesp - *yyes + 1; 1100 if (yylen < yysize) 1101 { 1102 yyesp -= yylen; 1103 yylen = 0; 1104 } 1105 else 1106 { 1107 yyesp = yyes_prev; 1108 yylen -= yysize; 1109 } 1110 } 1111 /* Only afterwards look at the main stack. */ 1112 if (yylen) 1113 yyesp = yyes_prev -= yylen; 1114 } 1115 /* Push the resulting state of the reduction. */ 1116 { 1117 yy_state_fast_t yystate; 1118 { 1119 const int yylhs = yyr1[yyrule] - YYNTOKENS; 1120 const int yyi = yypgoto[yylhs] + *yyesp; 1121 yystate = (0 <= yyi && yyi <= YYLAST && yycheck[yyi] == *yyesp 1122 ? yytable[yyi] 1123 : yydefgoto[yylhs]); 1124 } 1125 if (yyesp == yyes_prev) 1126 { 1127 yyesp = *yyes; 1128 YY_IGNORE_USELESS_CAST_BEGIN 1129 *yyesp = YY_CAST (yy_state_t, yystate); 1130 YY_IGNORE_USELESS_CAST_END 1131 } 1132 else 1133 { 1134 if (yy_lac_stack_realloc (yyes_capacity, 1, 1135 #if ]b4_api_PREFIX[DEBUG 1136 " (", ")", 1137 #endif 1138 yyes, yyesa, &yyesp, yyes_prev)) 1139 { 1140 YYDPRINTF ((stderr, "\n")); 1141 return YYENOMEM; 1142 } 1143 YY_IGNORE_USELESS_CAST_BEGIN 1144 *++yyesp = YY_CAST (yy_state_t, yystate); 1145 YY_IGNORE_USELESS_CAST_END 1146 } 1147 YYDPRINTF ((stderr, " G%d", yystate)); 1148 } 1149 } 1150 }]])[ 1151 1152 ]b4_parse_error_case([simple], [], 1153 [[/* Context of a parse error. */ 1154 typedef struct 1155 {]b4_push_if([[ 1156 yypstate* yyps;]], [[ 1157 yy_state_t *yyssp;]b4_lac_if([[ 1158 yy_state_t *yyesa; 1159 yy_state_t **yyes; 1160 YYPTRDIFF_T *yyes_capacity;]])])[ 1161 yysymbol_kind_t yytoken;]b4_locations_if([[ 1162 YYLTYPE *yylloc;]])[ 1163 } yypcontext_t; 1164 1165 /* Put in YYARG at most YYARGN of the expected tokens given the 1166 current YYCTX, and return the number of tokens stored in YYARG. If 1167 YYARG is null, return the number of expected tokens (guaranteed to 1168 be less than YYNTOKENS). Return YYENOMEM on memory exhaustion. 1169 Return 0 if there are more than YYARGN expected tokens, yet fill 1170 YYARG up to YYARGN. */]b4_push_if([[ 1171 static int 1172 yypstate_expected_tokens (yypstate *yyps, 1173 yysymbol_kind_t yyarg[], int yyargn)]], [[ 1174 static int 1175 yypcontext_expected_tokens (const yypcontext_t *yyctx, 1176 yysymbol_kind_t yyarg[], int yyargn)]])[ 1177 { 1178 /* Actual size of YYARG. */ 1179 int yycount = 0; 1180 ]b4_lac_if([[ 1181 int yyx; 1182 for (yyx = 0; yyx < YYNTOKENS; ++yyx) 1183 { 1184 yysymbol_kind_t yysym = YY_CAST (yysymbol_kind_t, yyx); 1185 if (yysym != ]b4_symbol(error, kind)[ && yysym != ]b4_symbol_prefix[YYUNDEF) 1186 switch (yy_lac (]b4_push_if([[yyps->yyesa, &yyps->yyes, &yyps->yyes_capacity, yyps->yyssp, yysym]], 1187 [[yyctx->yyesa, yyctx->yyes, yyctx->yyes_capacity, yyctx->yyssp, yysym]])[)) 1188 { 1189 case YYENOMEM: 1190 return YYENOMEM; 1191 case 1: 1192 continue; 1193 default: 1194 if (!yyarg) 1195 ++yycount; 1196 else if (yycount == yyargn) 1197 return 0; 1198 else 1199 yyarg[yycount++] = yysym; 1200 } 1201 }]], 1202 [[ int yyn = yypact@{+*]b4_push_if([yyps], [yyctx])[->yyssp@}; 1203 if (!yypact_value_is_default (yyn)) 1204 { 1205 /* Start YYX at -YYN if negative to avoid negative indexes in 1206 YYCHECK. In other words, skip the first -YYN actions for 1207 this state because they are default actions. */ 1208 int yyxbegin = yyn < 0 ? -yyn : 0; 1209 /* Stay within bounds of both yycheck and yytname. */ 1210 int yychecklim = YYLAST - yyn + 1; 1211 int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; 1212 int yyx; 1213 for (yyx = yyxbegin; yyx < yyxend; ++yyx) 1214 if (yycheck[yyx + yyn] == yyx && yyx != ]b4_symbol(error, kind)[ 1215 && !yytable_value_is_error (yytable[yyx + yyn])) 1216 { 1217 if (!yyarg) 1218 ++yycount; 1219 else if (yycount == yyargn) 1220 return 0; 1221 else 1222 yyarg[yycount++] = YY_CAST (yysymbol_kind_t, yyx); 1223 } 1224 }]])[ 1225 if (yyarg && yycount == 0 && 0 < yyargn) 1226 yyarg[0] = ]b4_symbol(empty, kind)[; 1227 return yycount; 1228 } 1229 1230 ]b4_push_if([[ 1231 /* Similar to the previous function. */ 1232 static int 1233 yypcontext_expected_tokens (const yypcontext_t *yyctx, 1234 yysymbol_kind_t yyarg[], int yyargn) 1235 { 1236 return yypstate_expected_tokens (yyctx->yyps, yyarg, yyargn); 1237 }]])[ 1238 ]])[ 1239 1240 ]b4_parse_error_bmatch( 1241 [custom], 1242 [[/* The kind of the lookahead of this context. */ 1243 static yysymbol_kind_t 1244 yypcontext_token (const yypcontext_t *yyctx) YY_ATTRIBUTE_UNUSED; 1245 1246 static yysymbol_kind_t 1247 yypcontext_token (const yypcontext_t *yyctx) 1248 { 1249 return yyctx->yytoken; 1250 } 1251 1252 ]b4_locations_if([[/* The location of the lookahead of this context. */ 1253 static YYLTYPE * 1254 yypcontext_location (const yypcontext_t *yyctx) YY_ATTRIBUTE_UNUSED; 1255 1256 static YYLTYPE * 1257 yypcontext_location (const yypcontext_t *yyctx) 1258 { 1259 return yyctx->yylloc; 1260 }]])[ 1261 1262 /* User defined function to report a syntax error. */ 1263 static int 1264 yyreport_syntax_error (const yypcontext_t *yyctx]b4_user_formals[);]], 1265 [detailed\|verbose], 1266 [[#ifndef yystrlen 1267 # if defined __GLIBC__ && defined _STRING_H 1268 # define yystrlen(S) (YY_CAST (YYPTRDIFF_T, strlen (S))) 1269 # else 1270 /* Return the length of YYSTR. */ 1271 static YYPTRDIFF_T 1272 yystrlen (const char *yystr) 1273 { 1274 YYPTRDIFF_T yylen; 1275 for (yylen = 0; yystr[yylen]; yylen++) 1276 continue; 1277 return yylen; 1278 } 1279 # endif 1280 #endif 1281 1282 #ifndef yystpcpy 1283 # if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE 1284 # define yystpcpy stpcpy 1285 # else 1286 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in 1287 YYDEST. */ 1288 static char * 1289 yystpcpy (char *yydest, const char *yysrc) 1290 { 1291 char *yyd = yydest; 1292 const char *yys = yysrc; 1293 1294 while ((*yyd++ = *yys++) != '\0') 1295 continue; 1296 1297 return yyd - 1; 1298 } 1299 # endif 1300 #endif 1301 1302 ]b4_parse_error_case( 1303 [verbose], 1304 [[#ifndef yytnamerr 1305 /* Copy to YYRES the contents of YYSTR after stripping away unnecessary 1306 quotes and backslashes, so that it's suitable for yyerror. The 1307 heuristic is that double-quoting is unnecessary unless the string 1308 contains an apostrophe, a comma, or backslash (other than 1309 backslash-backslash). YYSTR is taken from yytname. If YYRES is 1310 null, do not copy; instead, return the length of what the result 1311 would have been. */ 1312 static YYPTRDIFF_T 1313 yytnamerr (char *yyres, const char *yystr) 1314 { 1315 if (*yystr == '"') 1316 { 1317 YYPTRDIFF_T yyn = 0; 1318 char const *yyp = yystr; 1319 for (;;) 1320 switch (*++yyp) 1321 { 1322 case '\'': 1323 case ',': 1324 goto do_not_strip_quotes; 1325 1326 case '\\': 1327 if (*++yyp != '\\') 1328 goto do_not_strip_quotes; 1329 else 1330 goto append; 1331 1332 append: 1333 default: 1334 if (yyres) 1335 yyres[yyn] = *yyp; 1336 yyn++; 1337 break; 1338 1339 case '"': 1340 if (yyres) 1341 yyres[yyn] = '\0'; 1342 return yyn; 1343 } 1344 do_not_strip_quotes: ; 1345 } 1346 1347 if (yyres) 1348 return yystpcpy (yyres, yystr) - yyres; 1349 else 1350 return yystrlen (yystr); 1351 } 1352 #endif 1353 ]])[ 1354 1355 static int 1356 yy_syntax_error_arguments (const yypcontext_t *yyctx, 1357 yysymbol_kind_t yyarg[], int yyargn) 1358 { 1359 /* Actual size of YYARG. */ 1360 int yycount = 0; 1361 /* There are many possibilities here to consider: 1362 - If this state is a consistent state with a default action, then 1363 the only way this function was invoked is if the default action 1364 is an error action. In that case, don't check for expected 1365 tokens because there are none. 1366 - The only way there can be no lookahead present (in yychar) is if 1367 this state is a consistent state with a default action. Thus, 1368 detecting the absence of a lookahead is sufficient to determine 1369 that there is no unexpected or expected token to report. In that 1370 case, just report a simple "syntax error". 1371 - Don't assume there isn't a lookahead just because this state is a 1372 consistent state with a default action. There might have been a 1373 previous inconsistent state, consistent state with a non-default 1374 action, or user semantic action that manipulated yychar.]b4_lac_if([[ 1375 In the first two cases, it might appear that the current syntax 1376 error should have been detected in the previous state when yy_lac 1377 was invoked. However, at that time, there might have been a 1378 different syntax error that discarded a different initial context 1379 during error recovery, leaving behind the current lookahead.]], [[ 1380 - Of course, the expected token list depends on states to have 1381 correct lookahead information, and it depends on the parser not 1382 to perform extra reductions after fetching a lookahead from the 1383 scanner and before detecting a syntax error. Thus, state merging 1384 (from LALR or IELR) and default reductions corrupt the expected 1385 token list. However, the list is correct for canonical LR with 1386 one exception: it will still contain any token that will not be 1387 accepted due to an error action in a later state.]])[ 1388 */ 1389 if (yyctx->yytoken != ]b4_symbol(empty, kind)[) 1390 { 1391 int yyn;]b4_lac_if([[ 1392 YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[ 1393 if (yyarg) 1394 yyarg[yycount] = yyctx->yytoken; 1395 ++yycount; 1396 yyn = yypcontext_expected_tokens (yyctx, 1397 yyarg ? yyarg + 1 : yyarg, yyargn - 1); 1398 if (yyn == YYENOMEM) 1399 return YYENOMEM;]b4_lac_if([[ 1400 else if (yyn == 0) 1401 YYDPRINTF ((stderr, "No expected tokens.\n"));]])[ 1402 else 1403 yycount += yyn; 1404 } 1405 return yycount; 1406 } 1407 1408 /* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message 1409 about the unexpected token YYTOKEN for the state stack whose top is 1410 YYSSP.]b4_lac_if([[ In order to see if a particular token T is a 1411 valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[ 1412 1413 Return 0 if *YYMSG was successfully written. Return -1 if *YYMSG is 1414 not large enough to hold the message. In that case, also set 1415 *YYMSG_ALLOC to the required number of bytes. Return YYENOMEM if the 1416 required number of bytes is too large to store]b4_lac_if([[ or if 1417 yy_lac returned YYENOMEM]])[. */ 1418 static int 1419 yysyntax_error (YYPTRDIFF_T *yymsg_alloc, char **yymsg, 1420 const yypcontext_t *yyctx) 1421 { 1422 enum { YYARGS_MAX = 5 }; 1423 /* Internationalized format string. */ 1424 const char *yyformat = YY_NULLPTR; 1425 /* Arguments of yyformat: reported tokens (one for the "unexpected", 1426 one per "expected"). */ 1427 yysymbol_kind_t yyarg[YYARGS_MAX]; 1428 /* Cumulated lengths of YYARG. */ 1429 YYPTRDIFF_T yysize = 0; 1430 1431 /* Actual size of YYARG. */ 1432 int yycount = yy_syntax_error_arguments (yyctx, yyarg, YYARGS_MAX); 1433 if (yycount == YYENOMEM) 1434 return YYENOMEM; 1435 1436 switch (yycount) 1437 { 1438 #define YYCASE_(N, S) \ 1439 case N: \ 1440 yyformat = S; \ 1441 break 1442 default: /* Avoid compiler warnings. */ 1443 YYCASE_(0, YY_("syntax error")); 1444 YYCASE_(1, YY_("syntax error, unexpected %s")); 1445 YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); 1446 YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); 1447 YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); 1448 YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); 1449 #undef YYCASE_ 1450 } 1451 1452 /* Compute error message size. Don't count the "%s"s, but reserve 1453 room for the terminator. */ 1454 yysize = yystrlen (yyformat) - 2 * yycount + 1; 1455 { 1456 int yyi; 1457 for (yyi = 0; yyi < yycount; ++yyi) 1458 { 1459 YYPTRDIFF_T yysize1 1460 = yysize + ]b4_parse_error_case( 1461 [verbose], [[yytnamerr (YY_NULLPTR, yytname[yyarg[yyi]])]], 1462 [[yystrlen (yysymbol_name (yyarg[yyi]))]]);[ 1463 if (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM) 1464 yysize = yysize1; 1465 else 1466 return YYENOMEM; 1467 } 1468 } 1469 1470 if (*yymsg_alloc < yysize) 1471 { 1472 *yymsg_alloc = 2 * yysize; 1473 if (! (yysize <= *yymsg_alloc 1474 && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM)) 1475 *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM; 1476 return -1; 1477 } 1478 1479 /* Avoid sprintf, as that infringes on the user's name space. 1480 Don't have undefined behavior even if the translation 1481 produced a string with the wrong number of "%s"s. */ 1482 { 1483 char *yyp = *yymsg; 1484 int yyi = 0; 1485 while ((*yyp = *yyformat) != '\0') 1486 if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount) 1487 {]b4_parse_error_case([verbose], [[ 1488 yyp += yytnamerr (yyp, yytname[yyarg[yyi++]]);]], [[ 1489 yyp = yystpcpy (yyp, yysymbol_name (yyarg[yyi++]));]])[ 1490 yyformat += 2; 1491 } 1492 else 1493 { 1494 ++yyp; 1495 ++yyformat; 1496 } 1497 } 1498 return 0; 1499 } 1500 ]])[ 1501 1502 ]b4_yydestruct_define[ 1503 1504 ]b4_pure_if([], [b4_declare_scanner_communication_variables])[ 1505 1506 ]b4_push_if([b4_pull_if([[ 1507 1508 int 1509 yyparse (]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param)], [void])[) 1510 { 1511 yypstate *yyps = yypstate_new (); 1512 if (!yyps) 1513 {]b4_pure_if([b4_locations_if([[ 1514 static YYLTYPE yyloc_default][]b4_yyloc_default[; 1515 YYLTYPE yylloc = yyloc_default;]])[ 1516 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[ 1517 if (!yypstate_allocated) 1518 yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[ 1519 return 2; 1520 } 1521 int yystatus = yypull_parse (yyps]b4_user_args[); 1522 yypstate_delete (yyps); 1523 return yystatus; 1524 } 1525 1526 int 1527 yypull_parse (yypstate *yyps]b4_user_formals[) 1528 { 1529 YY_ASSERT (yyps);]b4_pure_if([b4_locations_if([[ 1530 static YYLTYPE yyloc_default][]b4_yyloc_default[; 1531 YYLTYPE yylloc = yyloc_default;]])])[ 1532 int yystatus; 1533 do { 1534 ]b4_pure_if([[ YYSTYPE yylval; 1535 int ]])[yychar = ]b4_yylex[; 1536 yystatus = yypush_parse (yyps]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[); 1537 } while (yystatus == YYPUSH_MORE); 1538 return yystatus; 1539 }]])[ 1540 1541 ]b4_parse_state_variable_macros([b4_pstate_macro_define])[ 1542 1543 /* Initialize the parser data structure. */ 1544 static void 1545 yypstate_clear (yypstate *yyps) 1546 { 1547 yynerrs = 0; 1548 yystate = 0; 1549 yyerrstatus = 0; 1550 1551 yyssp = yyss; 1552 yyvsp = yyvs;]b4_locations_if([[ 1553 yylsp = yyls;]])[ 1554 1555 /* Initialize the state stack, in case yypcontext_expected_tokens is 1556 called before the first call to yyparse. */ 1557 *yyssp = 0; 1558 yyps->yynew = 1; 1559 } 1560 1561 /* Initialize the parser data structure. */ 1562 yypstate * 1563 yypstate_new (void) 1564 { 1565 yypstate *yyps;]b4_pure_if([], [[ 1566 if (yypstate_allocated) 1567 return YY_NULLPTR;]])[ 1568 yyps = YY_CAST (yypstate *, YYMALLOC (sizeof *yyps)); 1569 if (!yyps) 1570 return YY_NULLPTR;]b4_pure_if([], [[ 1571 yypstate_allocated = 1;]])[ 1572 yystacksize = YYINITDEPTH; 1573 yyss = yyssa; 1574 yyvs = yyvsa;]b4_locations_if([[ 1575 yyls = yylsa;]])[]b4_lac_if([[ 1576 yyes = yyesa; 1577 yyes_capacity = ]b4_percent_define_get([[parse.lac.es-capacity-initial]])[; 1578 if (YYMAXDEPTH < yyes_capacity) 1579 yyes_capacity = YYMAXDEPTH;]])[ 1580 yypstate_clear (yyps); 1581 return yyps; 1582 } 1583 1584 void 1585 yypstate_delete (yypstate *yyps) 1586 { 1587 if (yyps) 1588 { 1589 #ifndef yyoverflow 1590 /* If the stack was reallocated but the parse did not complete, then the 1591 stack still needs to be freed. */ 1592 if (yyss != yyssa) 1593 YYSTACK_FREE (yyss); 1594 #endif]b4_lac_if([[ 1595 if (yyes != yyesa) 1596 YYSTACK_FREE (yyes);]])[ 1597 YYFREE (yyps);]b4_pure_if([], [[ 1598 yypstate_allocated = 0;]])[ 1599 } 1600 } 1601 ]])[ 1602 1603 ]b4_push_if([[ 1604 /*---------------. 1605 | yypush_parse. | 1606 `---------------*/ 1607 1608 int 1609 yypush_parse (yypstate *yyps]b4_pure_if([[, 1610 int yypushed_char, YYSTYPE const *yypushed_val]b4_locations_if([[, YYLTYPE *yypushed_loc]])])b4_user_formals[)]], 1611 [[ 1612 /*----------. 1613 | yyparse. | 1614 `----------*/ 1615 1616 ]m4_ifdef([b4_start_symbols], 1617 [[// Extract data from the parser. 1618 typedef struct 1619 { 1620 YYSTYPE yyvalue; 1621 int yynerrs; 1622 } yy_parse_impl_t; 1623 1624 // Run a full parse, using YYCHAR as switching token. 1625 static int 1626 yy_parse_impl (int yychar, yy_parse_impl_t *yyimpl]m4_ifset([b4_parse_param], [, b4_formals(b4_parse_param)])[); 1627 1628 ]m4_map([_b4_define_sub_yyparse], m4_defn([b4_start_symbols]))[ 1629 1630 int 1631 yyparse (]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param)], [void])[) 1632 { 1633 return yy_parse_impl (]b4_symbol(_b4_first_switching_token, id)[, YY_NULLPTR]m4_ifset([b4_parse_param], 1634 [[, ]b4_args(b4_parse_param)])[); 1635 } 1636 1637 static int 1638 yy_parse_impl (int yychar, yy_parse_impl_t *yyimpl]m4_ifset([b4_parse_param], [, b4_formals(b4_parse_param)])[)]], 1639 [[int 1640 yyparse (]m4_ifset([b4_parse_param], [b4_formals(b4_parse_param)], [void])[)]])])[ 1641 {]b4_pure_if([b4_declare_scanner_communication_variables 1642 ])b4_push_if([b4_pure_if([], [[ 1643 int yypushed_char = yychar; 1644 YYSTYPE yypushed_val = yylval;]b4_locations_if([[ 1645 YYLTYPE yypushed_loc = yylloc;]]) 1646 ])], 1647 [b4_declare_parser_state_variables([init]) 1648 ])b4_lac_if([[ 1649 /* Whether LAC context is established. A Boolean. */ 1650 int yy_lac_established = 0;]])[ 1651 int yyn; 1652 /* The return value of yyparse. */ 1653 int yyresult; 1654 /* Lookahead symbol kind. */ 1655 yysymbol_kind_t yytoken = ]b4_symbol(empty, kind)[; 1656 /* The variables used to return semantic value and location from the 1657 action routines. */ 1658 YYSTYPE yyval;]b4_locations_if([[ 1659 YYLTYPE yyloc; 1660 1661 /* The locations where the error started and ended. */ 1662 YYLTYPE yyerror_range[3];]])[ 1663 1664 ]b4_parse_error_bmatch([detailed\|verbose], 1665 [[ /* Buffer for error messages, and its allocated size. */ 1666 char yymsgbuf[128]; 1667 char *yymsg = yymsgbuf; 1668 YYPTRDIFF_T yymsg_alloc = sizeof yymsgbuf;]])[ 1669 1670 #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[) 1671 1672 /* The number of symbols on the RHS of the reduced rule. 1673 Keep to zero when no symbol should be popped. */ 1674 int yylen = 0;]b4_push_if([[ 1675 1676 switch (yyps->yynew) 1677 { 1678 case 0: 1679 yyn = yypact[yystate]; 1680 goto yyread_pushed_token; 1681 1682 case 2: 1683 yypstate_clear (yyps); 1684 break; 1685 1686 default: 1687 break; 1688 }]])[ 1689 1690 YYDPRINTF ((stderr, "Starting parse\n")); 1691 1692 ]m4_ifdef([b4_start_symbols], [], 1693 [[ yychar = ]b4_symbol(empty, id)[; /* Cause a token to be read. */ 1694 ]])[ 1695 ]m4_ifdef([b4_initial_action], [ 1696 b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [], [], 1697 [b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl 1698 b4_user_initial_action 1699 b4_dollar_popdef[]dnl 1700 m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval; 1701 ]])])dnl 1702 b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[; 1703 ]])dnl 1704 [ goto yysetstate; 1705 1706 1707 /*------------------------------------------------------------. 1708 | yynewstate -- push a new state, which is found in yystate. | 1709 `------------------------------------------------------------*/ 1710 yynewstate: 1711 /* In all cases, when you get here, the value and location stacks 1712 have just been pushed. So pushing a state here evens the stacks. */ 1713 yyssp++; 1714 1715 1716 /*--------------------------------------------------------------------. 1717 | yysetstate -- set current state (the top of the stack) to yystate. | 1718 `--------------------------------------------------------------------*/ 1719 yysetstate: 1720 YYDPRINTF ((stderr, "Entering state %d\n", yystate)); 1721 YY_ASSERT (0 <= yystate && yystate < YYNSTATES); 1722 YY_IGNORE_USELESS_CAST_BEGIN 1723 *yyssp = YY_CAST (yy_state_t, yystate); 1724 YY_IGNORE_USELESS_CAST_END 1725 YY_STACK_PRINT (yyss, yyssp); 1726 1727 if (yyss + yystacksize - 1 <= yyssp) 1728 #if !defined yyoverflow && !defined YYSTACK_RELOCATE 1729 YYNOMEM; 1730 #else 1731 { 1732 /* Get the current used size of the three stacks, in elements. */ 1733 YYPTRDIFF_T yysize = yyssp - yyss + 1; 1734 1735 # if defined yyoverflow 1736 { 1737 /* Give user a chance to reallocate the stack. Use copies of 1738 these so that the &'s don't force the real ones into 1739 memory. */ 1740 yy_state_t *yyss1 = yyss; 1741 YYSTYPE *yyvs1 = yyvs;]b4_locations_if([ 1742 YYLTYPE *yyls1 = yyls;])[ 1743 1744 /* Each stack pointer address is followed by the size of the 1745 data in use in that stack, in bytes. This used to be a 1746 conditional around just the two extra args, but that might 1747 be undefined if yyoverflow is a macro. */ 1748 yyoverflow (YY_("memory exhausted"), 1749 &yyss1, yysize * YYSIZEOF (*yyssp), 1750 &yyvs1, yysize * YYSIZEOF (*yyvsp),]b4_locations_if([ 1751 &yyls1, yysize * YYSIZEOF (*yylsp),])[ 1752 &yystacksize); 1753 yyss = yyss1; 1754 yyvs = yyvs1;]b4_locations_if([ 1755 yyls = yyls1;])[ 1756 } 1757 # else /* defined YYSTACK_RELOCATE */ 1758 /* Extend the stack our own way. */ 1759 if (YYMAXDEPTH <= yystacksize) 1760 YYNOMEM; 1761 yystacksize *= 2; 1762 if (YYMAXDEPTH < yystacksize) 1763 yystacksize = YYMAXDEPTH; 1764 1765 { 1766 yy_state_t *yyss1 = yyss; 1767 union yyalloc *yyptr = 1768 YY_CAST (union yyalloc *, 1769 YYSTACK_ALLOC (YY_CAST (YYSIZE_T, YYSTACK_BYTES (yystacksize)))); 1770 if (! yyptr) 1771 YYNOMEM; 1772 YYSTACK_RELOCATE (yyss_alloc, yyss); 1773 YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([ 1774 YYSTACK_RELOCATE (yyls_alloc, yyls);])[ 1775 # undef YYSTACK_RELOCATE 1776 if (yyss1 != yyssa) 1777 YYSTACK_FREE (yyss1); 1778 } 1779 # endif 1780 1781 yyssp = yyss + yysize - 1; 1782 yyvsp = yyvs + yysize - 1;]b4_locations_if([ 1783 yylsp = yyls + yysize - 1;])[ 1784 1785 YY_IGNORE_USELESS_CAST_BEGIN 1786 YYDPRINTF ((stderr, "Stack size increased to %ld\n", 1787 YY_CAST (long, yystacksize))); 1788 YY_IGNORE_USELESS_CAST_END 1789 1790 if (yyss + yystacksize - 1 <= yyssp) 1791 YYABORT; 1792 } 1793 #endif /* !defined yyoverflow && !defined YYSTACK_RELOCATE */ 1794 1795 ]m4_ifdef([b4_start_symbols], [], [[ 1796 if (yystate == YYFINAL) 1797 YYACCEPT;]])[ 1798 1799 goto yybackup; 1800 1801 1802 /*-----------. 1803 | yybackup. | 1804 `-----------*/ 1805 yybackup: 1806 /* Do appropriate processing given the current state. Read a 1807 lookahead token if we need one and don't already have one. */ 1808 1809 /* First try to decide what to do without reference to lookahead token. */ 1810 yyn = yypact[yystate]; 1811 if (yypact_value_is_default (yyn)) 1812 goto yydefault; 1813 1814 /* Not known => get a lookahead token if don't already have one. */ 1815 1816 /* YYCHAR is either empty, or end-of-input, or a valid lookahead. */ 1817 if (yychar == ]b4_symbol(empty, id)[) 1818 {]b4_push_if([[ 1819 if (!yyps->yynew) 1820 {]b4_use_push_for_pull_if([], [[ 1821 YYDPRINTF ((stderr, "Return for a new token:\n"));]])[ 1822 yyresult = YYPUSH_MORE; 1823 goto yypushreturn; 1824 } 1825 yyps->yynew = 0;]b4_pure_if([], [[ 1826 /* Restoring the pushed token is only necessary for the first 1827 yypush_parse invocation since subsequent invocations don't overwrite 1828 it before jumping to yyread_pushed_token. */ 1829 yychar = yypushed_char; 1830 yylval = yypushed_val;]b4_locations_if([[ 1831 yylloc = yypushed_loc;]])])[ 1832 yyread_pushed_token:]])[ 1833 YYDPRINTF ((stderr, "Reading a token\n"));]b4_push_if([b4_pure_if([[ 1834 yychar = yypushed_char; 1835 if (yypushed_val) 1836 yylval = *yypushed_val;]b4_locations_if([[ 1837 if (yypushed_loc) 1838 yylloc = *yypushed_loc;]])])], [[ 1839 yychar = ]b4_yylex[;]])[ 1840 } 1841 1842 if (yychar <= ]b4_symbol(eof, [id])[) 1843 { 1844 yychar = ]b4_symbol(eof, [id])[; 1845 yytoken = ]b4_symbol(eof, [kind])[; 1846 YYDPRINTF ((stderr, "Now at end of input.\n")); 1847 } 1848 else if (yychar == ]b4_symbol(error, [id])[) 1849 { 1850 /* The scanner already issued an error message, process directly 1851 to error recovery. But do not keep the error token as 1852 lookahead, it is too special and may lead us to an endless 1853 loop in error recovery. */ 1854 yychar = ]b4_symbol(undef, [id])[; 1855 yytoken = ]b4_symbol(error, [kind])[;]b4_locations_if([[ 1856 yyerror_range[1] = yylloc;]])[ 1857 goto yyerrlab1; 1858 } 1859 else 1860 { 1861 yytoken = YYTRANSLATE (yychar); 1862 YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); 1863 } 1864 1865 /* If the proper action on seeing token YYTOKEN is to reduce or to 1866 detect an error, take that action. */ 1867 yyn += yytoken; 1868 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[ 1869 { 1870 YY_LAC_ESTABLISH; 1871 goto yydefault; 1872 }]], [[ 1873 goto yydefault;]])[ 1874 yyn = yytable[yyn]; 1875 if (yyn <= 0) 1876 { 1877 if (yytable_value_is_error (yyn)) 1878 goto yyerrlab; 1879 yyn = -yyn;]b4_lac_if([[ 1880 YY_LAC_ESTABLISH;]])[ 1881 goto yyreduce; 1882 } 1883 1884 /* Count tokens shifted since error; after three, turn off error 1885 status. */ 1886 if (yyerrstatus) 1887 yyerrstatus--; 1888 1889 /* Shift the lookahead token. */ 1890 YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); 1891 yystate = yyn; 1892 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 1893 *++yyvsp = yylval; 1894 YY_IGNORE_MAYBE_UNINITIALIZED_END]b4_locations_if([ 1895 *++yylsp = yylloc;])[ 1896 1897 /* Discard the shifted token. */ 1898 yychar = ]b4_symbol(empty, id)[;]b4_lac_if([[ 1899 YY_LAC_DISCARD ("shift");]])[ 1900 goto yynewstate; 1901 1902 1903 /*-----------------------------------------------------------. 1904 | yydefault -- do the default action for the current state. | 1905 `-----------------------------------------------------------*/ 1906 yydefault: 1907 yyn = yydefact[yystate]; 1908 if (yyn == 0) 1909 goto yyerrlab; 1910 goto yyreduce; 1911 1912 1913 /*-----------------------------. 1914 | yyreduce -- do a reduction. | 1915 `-----------------------------*/ 1916 yyreduce: 1917 /* yyn is the number of a rule to reduce with. */ 1918 yylen = yyr2[yyn]; 1919 1920 /* If YYLEN is nonzero, implement the default value of the action: 1921 '$$ = $1'. 1922 1923 Otherwise, the following line sets YYVAL to garbage. 1924 This behavior is undocumented and Bison 1925 users should not rely upon it. Assigning to YYVAL 1926 unconditionally makes the parser a bit smaller, and it avoids a 1927 GCC warning that YYVAL may be used uninitialized. */ 1928 yyval = yyvsp[1-yylen]; 1929 1930 ]b4_locations_if( 1931 [[ /* Default location. */ 1932 YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen); 1933 yyerror_range[1] = yyloc;]])[ 1934 YY_REDUCE_PRINT (yyn);]b4_lac_if([[ 1935 { 1936 int yychar_backup = yychar; 1937 switch (yyn) 1938 { 1939 ]b4_user_actions[ 1940 default: break; 1941 } 1942 if (yychar_backup != yychar) 1943 YY_LAC_DISCARD ("yychar change"); 1944 }]], [[ 1945 switch (yyn) 1946 { 1947 ]b4_user_actions[ 1948 default: break; 1949 }]])[ 1950 /* User semantic actions sometimes alter yychar, and that requires 1951 that yytoken be updated with the new translation. We take the 1952 approach of translating immediately before every use of yytoken. 1953 One alternative is translating here after every semantic action, 1954 but that translation would be missed if the semantic action invokes 1955 YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or 1956 if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an 1957 incorrect destructor might then be invoked immediately. In the 1958 case of YYERROR or YYBACKUP, subsequent parser actions might lead 1959 to an incorrect destructor call or verbose syntax error message 1960 before the lookahead is translated. */ 1961 YY_SYMBOL_PRINT ("-> $$ =", YY_CAST (yysymbol_kind_t, yyr1[yyn]), &yyval, &yyloc); 1962 1963 YYPOPSTACK (yylen); 1964 yylen = 0; 1965 1966 *++yyvsp = yyval;]b4_locations_if([ 1967 *++yylsp = yyloc;])[ 1968 1969 /* Now 'shift' the result of the reduction. Determine what state 1970 that goes to, based on the state we popped back to and the rule 1971 number reduced by. */ 1972 { 1973 const int yylhs = yyr1[yyn] - YYNTOKENS; 1974 const int yyi = yypgoto[yylhs] + *yyssp; 1975 yystate = (0 <= yyi && yyi <= YYLAST && yycheck[yyi] == *yyssp 1976 ? yytable[yyi] 1977 : yydefgoto[yylhs]); 1978 } 1979 1980 goto yynewstate; 1981 1982 1983 /*--------------------------------------. 1984 | yyerrlab -- here on detecting error. | 1985 `--------------------------------------*/ 1986 yyerrlab: 1987 /* Make sure we have latest lookahead translation. See comments at 1988 user semantic actions for why this is necessary. */ 1989 yytoken = yychar == ]b4_symbol(empty, id)[ ? ]b4_symbol(empty, kind)[ : YYTRANSLATE (yychar); 1990 /* If not already recovering from an error, report this error. */ 1991 if (!yyerrstatus) 1992 { 1993 ++yynerrs; 1994 ]b4_parse_error_case( 1995 [custom], 1996 [[ { 1997 yypcontext_t yyctx 1998 = {]b4_push_if([[yyps]], [[yyssp]b4_lac_if([[, yyesa, &yyes, &yyes_capacity]])])[, yytoken]b4_locations_if([[, &yylloc]])[};]b4_lac_if([[ 1999 if (yychar != ]b4_symbol(empty, id)[) 2000 YY_LAC_ESTABLISH;]])[ 2001 if (yyreport_syntax_error (&yyctx]m4_ifset([b4_parse_param], 2002 [[, ]b4_args(b4_parse_param)])[) == 2) 2003 YYNOMEM; 2004 }]], 2005 [simple], 2006 [[ yyerror (]b4_yyerror_args[YY_("syntax error"));]], 2007 [[ { 2008 yypcontext_t yyctx 2009 = {]b4_push_if([[yyps]], [[yyssp]b4_lac_if([[, yyesa, &yyes, &yyes_capacity]])])[, yytoken]b4_locations_if([[, &yylloc]])[}; 2010 char const *yymsgp = YY_("syntax error"); 2011 int yysyntax_error_status;]b4_lac_if([[ 2012 if (yychar != ]b4_symbol(empty, id)[) 2013 YY_LAC_ESTABLISH;]])[ 2014 yysyntax_error_status = yysyntax_error (&yymsg_alloc, &yymsg, &yyctx); 2015 if (yysyntax_error_status == 0) 2016 yymsgp = yymsg; 2017 else if (yysyntax_error_status == -1) 2018 { 2019 if (yymsg != yymsgbuf) 2020 YYSTACK_FREE (yymsg); 2021 yymsg = YY_CAST (char *, 2022 YYSTACK_ALLOC (YY_CAST (YYSIZE_T, yymsg_alloc))); 2023 if (yymsg) 2024 { 2025 yysyntax_error_status 2026 = yysyntax_error (&yymsg_alloc, &yymsg, &yyctx); 2027 yymsgp = yymsg; 2028 } 2029 else 2030 { 2031 yymsg = yymsgbuf; 2032 yymsg_alloc = sizeof yymsgbuf; 2033 yysyntax_error_status = YYENOMEM; 2034 } 2035 } 2036 yyerror (]b4_yyerror_args[yymsgp); 2037 if (yysyntax_error_status == YYENOMEM) 2038 YYNOMEM; 2039 }]])[ 2040 } 2041 ]b4_locations_if([[ 2042 yyerror_range[1] = yylloc;]])[ 2043 if (yyerrstatus == 3) 2044 { 2045 /* If just tried and failed to reuse lookahead token after an 2046 error, discard it. */ 2047 2048 if (yychar <= ]b4_symbol(eof, [id])[) 2049 { 2050 /* Return failure if at end of input. */ 2051 if (yychar == ]b4_symbol(eof, [id])[) 2052 YYABORT; 2053 } 2054 else 2055 { 2056 yydestruct ("Error: discarding", 2057 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); 2058 yychar = ]b4_symbol(empty, id)[; 2059 } 2060 } 2061 2062 /* Else will try to reuse lookahead token after shifting the error 2063 token. */ 2064 goto yyerrlab1; 2065 2066 2067 /*---------------------------------------------------. 2068 | yyerrorlab -- error raised explicitly by YYERROR. | 2069 `---------------------------------------------------*/ 2070 yyerrorlab: 2071 /* Pacify compilers when the user code never invokes YYERROR and the 2072 label yyerrorlab therefore never appears in user code. */ 2073 if (0) 2074 YYERROR; 2075 ++yynerrs; 2076 2077 /* Do not reclaim the symbols of the rule whose action triggered 2078 this YYERROR. */ 2079 YYPOPSTACK (yylen); 2080 yylen = 0; 2081 YY_STACK_PRINT (yyss, yyssp); 2082 yystate = *yyssp; 2083 goto yyerrlab1; 2084 2085 2086 /*-------------------------------------------------------------. 2087 | yyerrlab1 -- common code for both syntax error and YYERROR. | 2088 `-------------------------------------------------------------*/ 2089 yyerrlab1: 2090 yyerrstatus = 3; /* Each real token shifted decrements this. */ 2091 2092 /* Pop stack until we find a state that shifts the error token. */ 2093 for (;;) 2094 { 2095 yyn = yypact[yystate]; 2096 if (!yypact_value_is_default (yyn)) 2097 { 2098 yyn += ]b4_symbol(error, kind)[; 2099 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == ]b4_symbol(error, kind)[) 2100 { 2101 yyn = yytable[yyn]; 2102 if (0 < yyn) 2103 break; 2104 } 2105 } 2106 2107 /* Pop the current state because it cannot handle the error token. */ 2108 if (yyssp == yyss) 2109 YYABORT; 2110 2111 ]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[ 2112 yydestruct ("Error: popping", 2113 YY_ACCESSING_SYMBOL (yystate), yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); 2114 YYPOPSTACK (1); 2115 yystate = *yyssp; 2116 YY_STACK_PRINT (yyss, yyssp); 2117 }]b4_lac_if([[ 2118 2119 /* If the stack popping above didn't lose the initial context for the 2120 current lookahead token, the shift below will for sure. */ 2121 YY_LAC_DISCARD ("error recovery");]])[ 2122 2123 YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN 2124 *++yyvsp = yylval; 2125 YY_IGNORE_MAYBE_UNINITIALIZED_END 2126 ]b4_locations_if([[ 2127 yyerror_range[2] = yylloc; 2128 ++yylsp; 2129 YYLLOC_DEFAULT (*yylsp, yyerror_range, 2);]])[ 2130 2131 /* Shift the error token. */ 2132 YY_SYMBOL_PRINT ("Shifting", YY_ACCESSING_SYMBOL (yyn), yyvsp, yylsp); 2133 2134 yystate = yyn; 2135 goto yynewstate; 2136 2137 2138 /*-------------------------------------. 2139 | yyacceptlab -- YYACCEPT comes here. | 2140 `-------------------------------------*/ 2141 yyacceptlab: 2142 yyresult = 0; 2143 goto yyreturnlab; 2144 2145 2146 /*-----------------------------------. 2147 | yyabortlab -- YYABORT comes here. | 2148 `-----------------------------------*/ 2149 yyabortlab: 2150 yyresult = 1; 2151 goto yyreturnlab; 2152 2153 2154 /*-----------------------------------------------------------. 2155 | yyexhaustedlab -- YYNOMEM (memory exhaustion) comes here. | 2156 `-----------------------------------------------------------*/ 2157 yyexhaustedlab: 2158 yyerror (]b4_yyerror_args[YY_("memory exhausted")); 2159 yyresult = 2; 2160 goto yyreturnlab; 2161 2162 2163 /*----------------------------------------------------------. 2164 | yyreturnlab -- parsing is finished, clean up and return. | 2165 `----------------------------------------------------------*/ 2166 yyreturnlab: 2167 if (yychar != ]b4_symbol(empty, id)[) 2168 { 2169 /* Make sure we have latest lookahead translation. See comments at 2170 user semantic actions for why this is necessary. */ 2171 yytoken = YYTRANSLATE (yychar); 2172 yydestruct ("Cleanup: discarding lookahead", 2173 yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); 2174 } 2175 /* Do not reclaim the symbols of the rule whose action triggered 2176 this YYABORT or YYACCEPT. */ 2177 YYPOPSTACK (yylen); 2178 YY_STACK_PRINT (yyss, yyssp); 2179 while (yyssp != yyss) 2180 { 2181 yydestruct ("Cleanup: popping", 2182 YY_ACCESSING_SYMBOL (+*yyssp), yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); 2183 YYPOPSTACK (1); 2184 }]b4_push_if([[ 2185 yyps->yynew = 2; 2186 goto yypushreturn; 2187 2188 2189 /*-------------------------. 2190 | yypushreturn -- return. | 2191 `-------------------------*/ 2192 yypushreturn:]], [[ 2193 #ifndef yyoverflow 2194 if (yyss != yyssa) 2195 YYSTACK_FREE (yyss); 2196 #endif]b4_lac_if([[ 2197 if (yyes != yyesa) 2198 YYSTACK_FREE (yyes);]])])[ 2199 ]b4_parse_error_bmatch([detailed\|verbose], 2200 [[ if (yymsg != yymsgbuf) 2201 YYSTACK_FREE (yymsg);]])[]m4_ifdef([b4_start_symbols], [[ 2202 if (yyimpl) 2203 yyimpl->yynerrs = yynerrs;]])[ 2204 return yyresult; 2205 } 2206 ]b4_push_if([b4_parse_state_variable_macros([b4_macro_undef])])[ 2207 ]b4_percent_code_get([[epilogue]])[]dnl 2208 b4_epilogue[]dnl 2209 b4_output_end 2210