tests/regression.at

   1 # Bison Regressions.                               -*- Autotest -*-
   2
   3 # Copyright (C) 2001-2013 Free Software Foundation, Inc.
   4
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 AT_BANNER([[Regression tests.]])
  19
  20
  21 ## ------------------ ##
  22 ## Trivial grammars.  ##
  23 ## ------------------ ##
  24
  25 AT_SETUP([Trivial grammars])
  26
  27 AT_BISON_OPTION_PUSHDEFS
  28 AT_DATA_GRAMMAR([input.y],
  29 [[%{
  30 ]AT_YYERROR_DECLARE_EXTERN[
  31 ]AT_YYLEX_DECLARE_EXTERN[
  32 #define YYSTYPE int *
  33 %}
  34
  35 %error-verbose
  36
  37 %%
  38
  39 program: 'x';
  40 ]])
  41 AT_BISON_OPTION_POPDEFS
  42
  43 AT_BISON_CHECK([-o input.c input.y])
  44 AT_COMPILE([input.o])
  45 AT_COMPILE([input.o], [-DYYDEBUG -c input.c])
  46
  47 AT_CLEANUP
  48
  49
  50
  51 ## ----------------- ##
  52 ## YYSTYPE typedef.  ##
  53 ## ----------------- ##
  54
  55 AT_SETUP([YYSTYPE typedef])
  56
  57 AT_BISON_OPTION_PUSHDEFS
  58 AT_DATA_GRAMMAR([input.y],
  59 [[%{
  60 ]AT_YYERROR_DECLARE_EXTERN[
  61 ]AT_YYLEX_DECLARE_EXTERN[
  62 typedef union { char const *val; } YYSTYPE;
  63 %}
  64
  65 %type <val> program
  66
  67 %%
  68
  69 program: { $$ = ""; };
  70 ]])
  71 AT_BISON_OPTION_POPDEFS
  72
  73 AT_BISON_CHECK([-o input.c input.y])
  74 AT_COMPILE([input.o])
  75
  76 AT_CLEANUP
  77
  78
  79
  80 ## ------------------------------------- ##
  81 ## Early token definitions with --yacc.  ##
  82 ## ------------------------------------- ##
  83
  84
  85 AT_SETUP([Early token definitions with --yacc])
  86
  87 # Found in GCJ: they expect the tokens to be defined before the user
  88 # prologue, so that they can use the token definitions in it.
  89
  90 AT_BISON_OPTION_PUSHDEFS
  91 AT_DATA_GRAMMAR([input.y],
  92 [[%{
  93 ]AT_YYERROR_DECLARE_EXTERN[
  94 ]AT_YYLEX_DECLARE_EXTERN[
  95 %}
  96
  97 %union
  98 {
  99   int val;
 100 };
 101 %{
 102 #ifndef MY_TOKEN
 103 # error "MY_TOKEN not defined."
 104 #endif
 105 %}
 106 %token MY_TOKEN
 107 %%
 108 exp: MY_TOKEN;
 109 %%
 110 ]])
 111 AT_BISON_OPTION_POPDEFS
 112
 113 AT_BISON_CHECK([-y -o input.c input.y])
 114 AT_COMPILE([input.o])
 115
 116 AT_CLEANUP
 117
 118
 119
 120 ## ---------------------------------------- ##
 121 ## Early token definitions without --yacc.  ##
 122 ## ---------------------------------------- ##
 123
 124
 125 AT_SETUP([Early token definitions without --yacc])
 126
 127 # Found in GCJ: they expect the tokens to be defined before the user
 128 # prologue, so that they can use the token definitions in it.
 129
 130 AT_BISON_OPTION_PUSHDEFS
 131 AT_DATA_GRAMMAR([input.y],
 132 [[%{
 133 ]AT_YYERROR_DECLARE_EXTERN[
 134 ]AT_YYLEX_DECLARE_EXTERN[
 135 void print_my_token (void);
 136 %}
 137
 138 %union
 139 {
 140   int val;
 141 };
 142 %{
 143 #include <stdio.h>
 144 void
 145 print_my_token (void)
 146 {
 147   enum yytokentype my_token = MY_TOKEN;
 148   printf ("%d\n", my_token);
 149 }
 150 %}
 151 %token MY_TOKEN
 152 %%
 153 exp: MY_TOKEN;
 154 %%
 155 ]])
 156 AT_BISON_OPTION_POPDEFS
 157
 158 AT_BISON_CHECK([-o input.c input.y])
 159 AT_COMPILE([input.o])
 160
 161 AT_CLEANUP
 162
 163
 164
 165 ## ---------------- ##
 166 ## Braces parsing.  ##
 167 ## ---------------- ##
 168
 169
 170 AT_SETUP([Braces parsing])
 171
 172 AT_BISON_OPTION_PUSHDEFS
 173 AT_DATA([input.y],
 174 [[/* Bison used to swallow the character after '}'. */
 175
 176 %%
 177 exp: { tests = {{{{{{{{{{}}}}}}}}}}; };
 178 %%
 179 ]])
 180 AT_BISON_OPTION_POPDEFS
 181
 182 AT_BISON_CHECK([-v -o input.c input.y])
 183
 184 AT_CHECK([grep 'tests = {{{{{{{{{{}}}}}}}}}};' input.c], 0, [ignore])
 185
 186 AT_CLEANUP
 187
 188
 189 ## ------------------ ##
 190 ## Duplicate string.  ##
 191 ## ------------------ ##
 192
 193
 194 AT_SETUP([Duplicate string])
 195
 196 AT_BISON_OPTION_PUSHDEFS
 197 AT_DATA([input.y],
 198 [[/* 'Bison -v' used to dump core when two tokens are defined with the same
 199    string, as LE and GE below. */
 200
 201 %token NUM
 202 %token LE "<="
 203 %token GE "<="
 204
 205 %%
 206 exp: '(' exp ')' | NUM ;
 207 %%
 208 ]])
 209 AT_BISON_OPTION_POPDEFS
 210
 211 AT_BISON_CHECK([-v -o input.c input.y], 0, [],
 212 [[input.y:6.8-14: warning: symbol "<=" used more than once as a literal string [-Wother]
 213 ]])
 214
 215 AT_CLEANUP
 216
 217
 218 ## ------------------- ##
 219 ## Rule Line Numbers.  ##
 220 ## ------------------- ##
 221
 222 AT_SETUP([Rule Line Numbers])
 223
 224 AT_KEYWORDS([report])
 225
 226 AT_BISON_OPTION_PUSHDEFS
 227 AT_DATA([input.y],
 228 [[%%
 229 expr:
 230 'a'
 231
 232 {
 233
 234 }
 235
 236 'b'
 237
 238 {
 239
 240 }
 241
 242 |
 243
 244
 245 {
 246
 247
 248 }
 249
 250 'c'
 251
 252 {
 253
 254 };
 255 ]])
 256 AT_BISON_OPTION_POPDEFS
 257
 258 AT_BISON_CHECK([-o input.c -v input.y])
 259
 260 # Check the contents of the report.
 261 AT_CHECK([cat input.output], [],
 262 [[Grammar
 263
 264     0 $accept: expr $end
 265
 266     1 $@1: /* empty */
 267
 268     2 expr: 'a' $@1 'b'
 269
 270     3 $@2: /* empty */
 271
 272     4 expr: $@2 'c'
 273
 274
 275 Terminals, with rules where they appear
 276
 277 $end (0) 0
 278 'a' (97) 2
 279 'b' (98) 2
 280 'c' (99) 4
 281 error (256)
 282
 283
 284 Nonterminals, with rules where they appear
 285
 286 $accept (6)
 287     on left: 0
 288 expr (7)
 289     on left: 2 4, on right: 0
 290 $@1 (8)
 291     on left: 1, on right: 2
 292 $@2 (9)
 293     on left: 3, on right: 4
 294
 295
 296 State 0
 297
 298     0 $accept: . expr $end
 299
 300     'a'  shift, and go to state 1
 301
 302     $default  reduce using rule 3 ($@2)
 303
 304     expr  go to state 2
 305     $@2   go to state 3
 306
 307
 308 State 1
 309
 310     2 expr: 'a' . $@1 'b'
 311
 312     $default  reduce using rule 1 ($@1)
 313
 314     $@1  go to state 4
 315
 316
 317 State 2
 318
 319     0 $accept: expr . $end
 320
 321     $end  shift, and go to state 5
 322
 323
 324 State 3
 325
 326     4 expr: $@2 . 'c'
 327
 328     'c'  shift, and go to state 6
 329
 330
 331 State 4
 332
 333     2 expr: 'a' $@1 . 'b'
 334
 335     'b'  shift, and go to state 7
 336
 337
 338 State 5
 339
 340     0 $accept: expr $end .
 341
 342     $default  accept
 343
 344
 345 State 6
 346
 347     4 expr: $@2 'c' .
 348
 349     $default  reduce using rule 4 (expr)
 350
 351
 352 State 7
 353
 354     2 expr: 'a' $@1 'b' .
 355
 356     $default  reduce using rule 2 (expr)
 357 ]])
 358
 359 AT_CLEANUP
 360
 361
 362
 363 ## ---------------------- ##
 364 ## Mixing %token styles.  ##
 365 ## ---------------------- ##
 366
 367
 368 AT_SETUP([Mixing %token styles])
 369
 370 # Taken from the documentation.
 371 AT_DATA([input.y],
 372 [[%token  <operator>  OR      "||"
 373 %token  <operator>  LE 134  "<="
 374 %left  OR  "<="
 375 %%
 376 exp: ;
 377 %%
 378 ]])
 379
 380 AT_BISON_CHECK([-v -o input.c input.y])
 381
 382 AT_CLEANUP
 383
 384
 385
 386 ## ---------------- ##
 387 ## Invalid inputs.  ##
 388 ## ---------------- ##
 389
 390
 391 AT_SETUP([Invalid inputs])
 392
 393 AT_DATA([input.y],
 394 [[%%
 395 ?
 396 default: 'a' }
 397 %&
 398 %a-does-not-exist
 399 %-
 400 %{
 401 ]])
 402
 403 AT_BISON_CHECK([input.y], [1], [],
 404 [[input.y:2.1: error: invalid character: '?'
 405 input.y:3.14: error: invalid character: '}'
 406 input.y:4.1: error: invalid character: '%'
 407 input.y:4.2: error: invalid character: '&'
 408 input.y:5.1-17: error: invalid directive: '%a-does-not-exist'
 409 input.y:6.1: error: invalid character: '%'
 410 input.y:6.2: error: invalid character: '-'
 411 input.y:7.1-8.0: error: missing '%}' at end of file
 412 input.y:7.1-8.0: error: syntax error, unexpected %{...%}
 413 ]])
 414
 415 AT_CLEANUP
 416
 417
 418 AT_SETUP([Invalid inputs with {}])
 419
 420 AT_DATA([input.y],
 421 [[
 422 %destructor
 423 %initial-action
 424 %lex-param
 425 %parse-param
 426 %printer
 427 %union
 428 ]])
 429
 430 AT_BISON_CHECK([input.y], [1], [],
 431 [[input.y:3.1-15: error: syntax error, unexpected %initial-action, expecting {...}
 432 ]])
 433
 434 AT_CLEANUP
 435
 436
 437
 438 ## ------------------- ##
 439 ## Token definitions.  ##
 440 ## ------------------- ##
 441
 442
 443 AT_SETUP([Token definitions])
 444
 445 AT_BISON_OPTION_PUSHDEFS
 446 # Bison managed, when fed with '%token 'f' "f"' to #define 'f'!
 447 AT_DATA_GRAMMAR([input.y],
 448 [%{
 449 ]AT_YYERROR_DECLARE[
 450 ]AT_YYLEX_DECLARE[
 451 %}
 452 [%error-verbose
 453 %token MYEOF 0 "end of file"
 454 %token 'a' "a"
 455 %token B_TOKEN "b"
 456 %token C_TOKEN 'c'
 457 %token 'd' D_TOKEN
 458 %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
 459 %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
 460 %%
 461 exp: "a" "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!";
 462 %%
 463 ]AT_YYERROR_DEFINE[
 464 ]AT_YYLEX_DEFINE([{ SPECIAL }])[
 465 ]AT_MAIN_DEFINE[
 466 ]])
 467 AT_BISON_OPTION_POPDEFS
 468
 469 # Checking the warning message guarantees that the trigraph "??!" isn't
 470 # unnecessarily escaped here even though it would need to be if encoded in a
 471 # C-string literal.  Also notice that unnecessary escaping, such as "\?", from
 472 # the user specification is eliminated.
 473 AT_BISON_CHECK([-o input.c input.y], [[0]], [[]],
 474 [[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
 475 input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
 476 ]])
 477 AT_BISON_CHECK([-fcaret -o input.c input.y], [[0]], [[]],
 478 [[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
 479  %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
 480         ^^^^^^^
 481 input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
 482  %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
 483         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 484 ]])
 485 AT_COMPILE([input])
 486
 487 # Checking the error message here guarantees that yytname, which does contain
 488 # C-string literals, does have the trigraph escaped correctly.  Thus, the
 489 # symbol name reported by the parser is exactly the same as that reported by
 490 # Bison itself.
 491 AT_DATA([experr],
 492 [[syntax error, unexpected "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!", expecting a
 493 ]])
 494 AT_PARSER_CHECK([./input], 1, [], [experr])
 495 AT_CLEANUP
 496
 497
 498
 499 ## -------------------- ##
 500 ## Characters Escapes.  ##
 501 ## -------------------- ##
 502
 503
 504 AT_SETUP([Characters Escapes])
 505
 506 AT_BISON_OPTION_PUSHDEFS
 507 AT_DATA_GRAMMAR([input.y],
 508 [%{
 509 ]AT_YYERROR_DECLARE_EXTERN[
 510 ]AT_YYLEX_DECLARE_EXTERN[
 511 %}
 512 [%%
 513 exp:
 514   '\'' "\'"
 515 | '\"' "\""
 516 | '"'  "'" /* Pacify font-lock-mode: ". */
 517 ;
 518 ]])
 519
 520 AT_BISON_OPTION_POPDEFS
 521
 522 AT_BISON_CHECK([-o input.c input.y])
 523 AT_COMPILE([input.o])
 524 AT_CLEANUP
 525
 526
 527
 528 ## -------------- ##
 529 ## Web2c Report.  ##
 530 ## -------------- ##
 531
 532 # The generation of the reduction was once wrong in Bison, and made it
 533 # miss some reductions.  In the following test case, the reduction on
 534 # 'undef_id_tok' in state 1 was missing.  This is stripped down from
 535 # the actual web2c.y.
 536
 537 AT_SETUP([Web2c Report])
 538
 539 AT_KEYWORDS([report])
 540
 541 AT_DATA([input.y],
 542 [[%token        undef_id_tok const_id_tok
 543
 544 %start CONST_DEC_PART
 545 \f
 546 %%
 547 CONST_DEC_PART:
 548          CONST_DEC_LIST
 549         ;
 550
 551 CONST_DEC_LIST:
 552           CONST_DEC
 553         | CONST_DEC_LIST CONST_DEC
 554         ;
 555
 556 CONST_DEC:
 557           { } undef_id_tok '=' const_id_tok ';'
 558         ;
 559 %%
 560 ]])
 561
 562 AT_BISON_CHECK([-v input.y])
 563 AT_CHECK([cat input.output], 0,
 564 [[Grammar
 565
 566     0 $accept: CONST_DEC_PART $end
 567
 568     1 CONST_DEC_PART: CONST_DEC_LIST
 569
 570     2 CONST_DEC_LIST: CONST_DEC
 571     3               | CONST_DEC_LIST CONST_DEC
 572
 573     4 $@1: /* empty */
 574
 575     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';'
 576
 577
 578 Terminals, with rules where they appear
 579
 580 $end (0) 0
 581 ';' (59) 5
 582 '=' (61) 5
 583 error (256)
 584 undef_id_tok (258) 5
 585 const_id_tok (259) 5
 586
 587
 588 Nonterminals, with rules where they appear
 589
 590 $accept (7)
 591     on left: 0
 592 CONST_DEC_PART (8)
 593     on left: 1, on right: 0
 594 CONST_DEC_LIST (9)
 595     on left: 2 3, on right: 1 3
 596 CONST_DEC (10)
 597     on left: 5, on right: 2 3
 598 $@1 (11)
 599     on left: 4, on right: 5
 600
 601
 602 State 0
 603
 604     0 $accept: . CONST_DEC_PART $end
 605
 606     $default  reduce using rule 4 ($@1)
 607
 608     CONST_DEC_PART  go to state 1
 609     CONST_DEC_LIST  go to state 2
 610     CONST_DEC       go to state 3
 611     $@1             go to state 4
 612
 613
 614 State 1
 615
 616     0 $accept: CONST_DEC_PART . $end
 617
 618     $end  shift, and go to state 5
 619
 620
 621 State 2
 622
 623     1 CONST_DEC_PART: CONST_DEC_LIST .
 624     3 CONST_DEC_LIST: CONST_DEC_LIST . CONST_DEC
 625
 626     undef_id_tok  reduce using rule 4 ($@1)
 627     $default      reduce using rule 1 (CONST_DEC_PART)
 628
 629     CONST_DEC  go to state 6
 630     $@1        go to state 4
 631
 632
 633 State 3
 634
 635     2 CONST_DEC_LIST: CONST_DEC .
 636
 637     $default  reduce using rule 2 (CONST_DEC_LIST)
 638
 639
 640 State 4
 641
 642     5 CONST_DEC: $@1 . undef_id_tok '=' const_id_tok ';'
 643
 644     undef_id_tok  shift, and go to state 7
 645
 646
 647 State 5
 648
 649     0 $accept: CONST_DEC_PART $end .
 650
 651     $default  accept
 652
 653
 654 State 6
 655
 656     3 CONST_DEC_LIST: CONST_DEC_LIST CONST_DEC .
 657
 658     $default  reduce using rule 3 (CONST_DEC_LIST)
 659
 660
 661 State 7
 662
 663     5 CONST_DEC: $@1 undef_id_tok . '=' const_id_tok ';'
 664
 665     '='  shift, and go to state 8
 666
 667
 668 State 8
 669
 670     5 CONST_DEC: $@1 undef_id_tok '=' . const_id_tok ';'
 671
 672     const_id_tok  shift, and go to state 9
 673
 674
 675 State 9
 676
 677     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok . ';'
 678
 679     ';'  shift, and go to state 10
 680
 681
 682 State 10
 683
 684     5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';' .
 685
 686     $default  reduce using rule 5 (CONST_DEC)
 687 ]])
 688
 689 AT_CLEANUP
 690
 691
 692 ## --------------- ##
 693 ## Web2c Actions.  ##
 694 ## --------------- ##
 695
 696 # The generation of the mapping 'state -> action' was once wrong in
 697 # extremely specific situations.  web2c.y exhibits this situation.
 698 # Below is a stripped version of the grammar.  It looks like one can
 699 # simplify it further, but just don't: it is tuned to exhibit a bug,
 700 # which disapears when applying sane grammar transformations.
 701 #
 702 # It used to be wrong on yydefact only:
 703 #
 704 # static const yytype_uint8 yydefact[] =
 705 #  {
 706 # -       2,     0,     1,     0,     0,     2,     3,     2,     5,     4,
 707 # +       2,     0,     1,     0,     0,     0,     3,     2,     5,     4,
 708 #         0,     0
 709 #  };
 710 #
 711 # but let's check all the tables.
 712
 713
 714 AT_SETUP([Web2c Actions])
 715
 716 AT_KEYWORDS([report])
 717
 718 AT_DATA([input.y],
 719 [[%%
 720 statement:  struct_stat;
 721 struct_stat:  /* empty. */ | if else;
 722 if: "if" "const" "then" statement;
 723 else: "else" statement;
 724 %%
 725 ]])
 726
 727 AT_BISON_CHECK([-v -o input.c input.y])
 728
 729 # Check only the tables.
 730 [sed -n 's/  *$//;/^static const.*\[\] =/,/^}/p' input.c >tables.c]
 731
 732 AT_CHECK([[cat tables.c]], 0,
 733 [[static const yytype_uint8 yytranslate[] =
 734 {
 735        0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 736        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 737        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 738        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 739        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 740        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 741        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 742        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 743        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 744        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 745        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 746        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 747        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 748        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 749        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 750        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 751        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 752        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 753        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 754        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 755        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 756        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 757        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 758        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 759        2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
 760        2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
 761        5,     6
 762 };
 763 static const yytype_uint8 yyrline[] =
 764 {
 765        0,     2,     2,     3,     3,     4,     5
 766 };
 767 static const char *const yytname[] =
 768 {
 769   "$end", "error", "$undefined", "\"if\"", "\"const\"", "\"then\"",
 770   "\"else\"", "$accept", "statement", "struct_stat", "if", "else", YY_NULL
 771 };
 772 static const yytype_uint16 yytoknum[] =
 773 {
 774        0,   256,   257,   258,   259,   260,   261
 775 };
 776 static const yytype_int8 yypact[] =
 777 {
 778       -2,    -1,     4,    -8,     0,     2,    -8,    -2,    -8,    -2,
 779       -8,    -8
 780 };
 781 static const yytype_uint8 yydefact[] =
 782 {
 783        3,     0,     0,     2,     0,     0,     1,     3,     4,     3,
 784        6,     5
 785 };
 786 static const yytype_int8 yypgoto[] =
 787 {
 788       -8,    -7,    -8,    -8,    -8
 789 };
 790 static const yytype_int8 yydefgoto[] =
 791 {
 792       -1,     2,     3,     4,     8
 793 };
 794 static const yytype_uint8 yytable[] =
 795 {
 796       10,     1,    11,     5,     6,     0,     7,     9
 797 };
 798 static const yytype_int8 yycheck[] =
 799 {
 800        7,     3,     9,     4,     0,    -1,     6,     5
 801 };
 802 static const yytype_uint8 yystos[] =
 803 {
 804        0,     3,     8,     9,    10,     4,     0,     6,    11,     5,
 805        8,     8
 806 };
 807 static const yytype_uint8 yyr1[] =
 808 {
 809        0,     7,     8,     9,     9,    10,    11
 810 };
 811 static const yytype_uint8 yyr2[] =
 812 {
 813        0,     2,     1,     0,     2,     4,     2
 814 };
 815 ]])
 816
 817 AT_CLEANUP
 818
 819
 820 ## ------------------------- ##
 821 ## yycheck Bound Violation.  ##
 822 ## ------------------------- ##
 823
 824
 825 # _AT_DATA_DANCER_Y(BISON-OPTIONS)
 826 # --------------------------------
 827 # The following grammar, taken from Andrew Suffield's GPL'd implementation
 828 # of DGMTP, the Dancer Generic Message Transport Protocol, used to violate
 829 # yycheck's bounds where issuing a verbose error message.  Keep this test
 830 # so that possible bound checking compilers could check all the skeletons.
 831 m4_define([_AT_DATA_DANCER_Y],
 832 [AT_DATA_GRAMMAR([dancer.y],
 833 [[%code provides
 834 {
 835   ]AT_YYERROR_DECLARE[
 836   ]AT_YYLEX_DECLARE[
 837 }
 838 $1
 839 %token ARROW INVALID NUMBER STRING DATA
 840 %verbose
 841 %error-verbose
 842 /* Grammar follows */
 843 %%
 844 line: header body
 845    ;
 846
 847 header: '<' from ARROW to '>' type ':'
 848    | '<' ARROW to '>' type ':'
 849    | ARROW to type ':'
 850    | type ':'
 851    | '<' '>'
 852    ;
 853
 854 from: DATA
 855    | STRING
 856    | INVALID
 857    ;
 858
 859 to: DATA
 860    | STRING
 861    | INVALID
 862    ;
 863
 864 type: DATA
 865    | STRING
 866    | INVALID
 867    ;
 868
 869 body: /* empty */
 870    | body member
 871    ;
 872
 873 member: STRING
 874    | DATA
 875    | '+' NUMBER
 876    | '-' NUMBER
 877    | NUMBER
 878    | INVALID
 879    ;
 880 %%
 881 ]AT_YYERROR_DEFINE[
 882 ]AT_YYLEX_DEFINE([":"])[
 883 ]AT_MAIN_DEFINE[
 884 ]])
 885 ])# _AT_DATA_DANCER_Y
 886
 887
 888 # AT_CHECK_DANCER(BISON-OPTIONS)
 889 # ------------------------------
 890 # Generate the grammar, compile it, run it.
 891 m4_define([AT_CHECK_DANCER],
 892 [AT_SETUP([Dancer $1])
 893 AT_BISON_OPTION_PUSHDEFS([$1])
 894 _AT_DATA_DANCER_Y([$1])
 895 AT_FULL_COMPILE([dancer])
 896 AT_PARSER_CHECK([./dancer], 1, [],
 897 [syntax error, unexpected ':'
 898 ])
 899 AT_BISON_OPTION_POPDEFS
 900 AT_CLEANUP
 901 ])
 902
 903 AT_CHECK_DANCER()
 904 AT_CHECK_DANCER([%glr-parser])
 905 AT_CHECK_DANCER([%skeleton "lalr1.cc"])
 906
 907
 908 ## ------------------------------------------ ##
 909 ## Diagnostic that expects two alternatives.  ##
 910 ## ------------------------------------------ ##
 911
 912
 913 # _AT_DATA_EXPECT2_Y(BISON-OPTIONS)
 914 # --------------------------------
 915 m4_define([_AT_DATA_EXPECT2_Y],
 916 [AT_DATA_GRAMMAR([expect2.y],
 917 [%{
 918 static int yylex (AT_LALR1_CC_IF([int *], [void]));
 919 AT_LALR1_CC_IF([[#include <cstdlib>]],
 920 [[
 921 ]AT_YYERROR_DECLARE])[
 922 %}
 923 $1
 924 %error-verbose
 925 %token A 1000
 926 %token B
 927
 928 %%
 929 program: /* empty */
 930  | program e ';'
 931  | program error ';';
 932
 933 e: e '+' t | t;
 934 t: A | B;
 935
 936 %%
 937 ]AT_YYERROR_DEFINE[
 938 ]AT_LALR1_CC_IF(
 939 [int
 940 yyparse ()
 941 {
 942   yy::parser parser;
 943   return parser.parse ();
 944 }
 945 ])[
 946
 947 #include <assert.h>
 948 static int
 949 yylex (]AT_LALR1_CC_IF([int *lval], [void])[)
 950 {
 951   static int const tokens[] =
 952     {
 953       1000, '+', '+', -1
 954     };
 955   static size_t toknum;
 956   ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC.  */])[
 957   assert (toknum < sizeof tokens / sizeof *tokens);
 958   return tokens[toknum++];
 959 }
 960 ]AT_MAIN_DEFINE[
 961 ]])
 962 ])# _AT_DATA_EXPECT2_Y
 963
 964
 965 # AT_CHECK_EXPECT2(BISON-OPTIONS)
 966 # -------------------------------
 967 # Generate the grammar, compile it, run it.
 968 m4_define([AT_CHECK_EXPECT2],
 969 [AT_SETUP([Expecting two tokens $1])
 970 AT_BISON_OPTION_PUSHDEFS([$1])
 971 _AT_DATA_EXPECT2_Y([$1])
 972 AT_FULL_COMPILE([expect2])
 973 AT_PARSER_CHECK([./expect2], 1, [],
 974 [syntax error, unexpected '+', expecting A or B
 975 ])
 976 AT_BISON_OPTION_POPDEFS
 977 AT_CLEANUP
 978 ])
 979
 980 AT_CHECK_EXPECT2()
 981 AT_CHECK_EXPECT2([%glr-parser])
 982 AT_CHECK_EXPECT2([%skeleton "lalr1.cc"])
 983
 984
 985
 986 ## --------------------------------------------- ##
 987 ## Braced code in declaration in rules section.  ##
 988 ## --------------------------------------------- ##
 989
 990 AT_SETUP([Braced code in declaration in rules section])
 991
 992 # Bison once mistook braced code in a declaration in the rules section to be a
 993 # rule action.
 994 AT_BISON_OPTION_PUSHDEFS([%debug])
 995 AT_DATA_GRAMMAR([input.y],
 996 [[%{
 997 ]AT_YYERROR_DECLARE[
 998 ]AT_YYLEX_DECLARE[
 999 %}
1000 %debug
1001 %error-verbose
1002 %%
1003
1004 start:
1005   {
1006     printf ("Bison would once convert this action to a midrule because of the"
1007             " subsequent braced code.\n");
1008   }
1009   ;
1010
1011 %destructor { fprintf (stderr, "DESTRUCTOR\n"); } 'a';
1012 %printer { fprintf (yyoutput, "PRINTER"); } 'a';
1013
1014 %%
1015 ]AT_YYERROR_DEFINE[
1016 ]AT_YYLEX_DEFINE(["a"])[
1017 ]AT_MAIN_DEFINE[
1018 ]])
1019 AT_BISON_OPTION_POPDEFS
1020
1021 AT_BISON_CHECK([-o input.c input.y])
1022 AT_COMPILE([input])
1023 AT_PARSER_CHECK([./input --debug], 1,
1024 [[Bison would once convert this action to a midrule because of the subsequent braced code.
1025 ]],
1026 [[Starting parse
1027 Entering state 0
1028 Reducing stack by rule 1 (line 20):
1029 -> $$ = nterm start ()
1030 Stack now 0
1031 Entering state 1
1032 Reading a token: Next token is token 'a' (PRINTER)
1033 syntax error, unexpected 'a', expecting $end
1034 Error: popping nterm start ()
1035 Stack now 0
1036 Cleanup: discarding lookahead token 'a' (PRINTER)
1037 DESTRUCTOR
1038 Stack now 0
1039 ]])
1040
1041 AT_CLEANUP
1042
1043
1044
1045 ## --------------------------------- ##
1046 ## String alias declared after use.  ##
1047 ## --------------------------------- ##
1048
1049 AT_SETUP([String alias declared after use])
1050
1051 # Bison once incorrectly asserted that the symbol number for either a token or
1052 # its alias was the highest symbol number so far at the point of the alias
1053 # declaration.  That was true unless the declaration appeared after their first
1054 # uses and other tokens appeared in between.
1055
1056 AT_DATA([input.y],
1057 [[%%
1058 start: 'a' "A" 'b';
1059 %token 'a' "A";
1060 ]])
1061
1062 AT_BISON_CHECK([-o input.c input.y])
1063
1064 AT_CLEANUP
1065
1066
1067
1068 ## -------------------------------- ##
1069 ## Extra lookahead sets in report.  ##
1070 ## -------------------------------- ##
1071
1072 AT_SETUP([[Extra lookahead sets in report]])
1073
1074 # Bison prints each reduction's lookahead set only next to the associated
1075 # state's one item that (1) is associated with the same rule as the reduction
1076 # and (2) has its dot at the end of its RHS.  Previously, Bison also
1077 # erroneously printed the lookahead set next to all of the state's other items
1078 # associated with the same rule.  This bug affected only the '.output' file and
1079 # not the generated parser source code.
1080
1081 AT_DATA([[input.y]],
1082 [[%%
1083 start: a | 'a' a 'a' ;
1084 a: 'a' ;
1085 ]])
1086
1087 AT_BISON_CHECK([[--report=all input.y]])
1088 AT_CHECK([[sed -n '/^State 1$/,/^State 2$/p' input.output]], [[0]],
1089 [[State 1
1090
1091     2 start: 'a' . a 'a'
1092     3 a: . 'a'
1093     3  | 'a' .  [$end]
1094
1095     'a'  shift, and go to state 4
1096
1097     $default  reduce using rule 3 (a)
1098
1099     a  go to state 5
1100
1101
1102 State 2
1103 ]])
1104
1105 AT_CLEANUP
1106
1107
1108
1109 ## ---------------------------------------- ##
1110 ## Token number in precedence declaration.  ##
1111 ## ---------------------------------------- ##
1112
1113 AT_SETUP([[Token number in precedence declaration]])
1114
1115 # POSIX says token numbers can be declared in %left, %right, and %nonassoc, but
1116 # we lost this in Bison 1.50.
1117 AT_BISON_OPTION_PUSHDEFS
1118 AT_DATA_GRAMMAR([input.y],
1119 [[%code {
1120   ]AT_YYERROR_DECLARE[
1121   ]AT_YYLEX_DECLARE[
1122 }
1123
1124 %error-verbose
1125 %right END 0
1126 %left TK1 1 TK2 2 "tok alias" 3
1127
1128 %%
1129
1130 start:
1131     TK1 sr_conflict "tok alias"
1132   | start %prec END
1133   ;
1134 sr_conflict:
1135   TK2
1136   | TK2 "tok alias"
1137   ;
1138
1139 %%
1140
1141 ]AT_YYERROR_DEFINE[
1142 ]AT_YYLEX_DEFINE([{ 1, 2, 3, 0 }])[
1143 ]AT_MAIN_DEFINE[
1144 ]])
1145 AT_BISON_OPTION_POPDEFS
1146
1147 AT_BISON_CHECK([[-o input.c input.y]], [[0]],,
1148 [[input.y:24.5-19: warning: rule useless in parser due to conflicts: start: start [-Wother]
1149 input.y:28.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias" [-Wother]
1150 ]])
1151 AT_COMPILE([[input]])
1152 AT_PARSER_CHECK([[./input]])
1153
1154 AT_CLEANUP
1155
1156
1157
1158 ## --------------------------- ##
1159 ## parse-gram.y: LALR = IELR.  ##
1160 ## --------------------------- ##
1161
1162 # If parse-gram.y's LALR and IELR parser tables ever begin to differ, we
1163 # need to fix parse-gram.y or start using IELR.
1164
1165 AT_SETUP([[parse-gram.y: LALR = IELR]])
1166
1167 # Avoid tests/bison's dark magic by processing a local copy of the
1168 # grammar.  Avoid differences in synclines by telling bison that the
1169 # output files have the same name.
1170 [cp $abs_top_srcdir/src/parse-gram.y input.y]
1171 AT_BISON_CHECK([[-o input.c -Dlr.type=lalr input.y]])
1172 [mv input.c lalr.c]
1173 AT_CAPTURE_FILE([lalr.c])
1174 AT_BISON_CHECK([[-o input.c -Dlr.type=ielr input.y]])
1175 [mv input.c ielr.c]
1176 AT_CAPTURE_FILE([ielr.c])
1177 AT_CHECK([[diff lalr.c ielr.c]], [[0]])
1178
1179 AT_CLEANUP
1180
1181
1182
1183 ## -------------------------------------------- ##
1184 ## parse.error=verbose and YYSTACK_USE_ALLOCA.  ##
1185 ## -------------------------------------------- ##
1186
1187 AT_SETUP([[parse.error=verbose and YYSTACK_USE_ALLOCA]])
1188
1189 AT_BISON_OPTION_PUSHDEFS
1190 AT_DATA_GRAMMAR([input.y],
1191 [[%code {
1192   ]AT_YYERROR_DECLARE[
1193   ]AT_YYLEX_DECLARE[
1194   #define YYSTACK_USE_ALLOCA 1
1195 }
1196
1197 %define parse.error verbose
1198
1199 %%
1200
1201 start: check syntax_error syntax_error ;
1202
1203 check:
1204 {
1205   if (128 < sizeof yymsgbuf)
1206     {
1207       fprintf (stderr,
1208                "The initial size of yymsgbuf in yyparse has increased\n"
1209                "since this test group was last updated.  As a result,\n"
1210                "this test group may no longer manage to induce a\n"
1211                "reallocation of the syntax error message buffer.\n"
1212                "This test group must be adjusted to produce a longer\n"
1213                "error message.\n");
1214       YYABORT;
1215     }
1216 }
1217 ;
1218
1219 // Induce a syntax error message whose total length is more than
1220 // sizeof yymsgbuf in yyparse.  Each token here is 64 bytes.
1221 syntax_error:
1222   "123456789112345678921234567893123456789412345678951234567896123A"
1223 | "123456789112345678921234567893123456789412345678951234567896123B"
1224 | error 'a' 'b' 'c'
1225 ;
1226
1227 %%
1228
1229 ]AT_YYERROR_DEFINE[
1230   /* Induce two syntax error messages (which requires full error
1231      recovery by shifting 3 tokens) in order to detect any loss of the
1232      reallocated buffer.  */
1233 ]AT_YYLEX_DEFINE(["abc"])[
1234 ]AT_MAIN_DEFINE[
1235 ]])
1236 AT_BISON_OPTION_POPDEFS
1237
1238 AT_BISON_CHECK([[-o input.c input.y]])
1239 AT_COMPILE([[input]])
1240 AT_PARSER_CHECK([[./input]], [[1]], [],
1241 [[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B
1242 syntax error, unexpected $end, expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B
1243 ]])
1244
1245 AT_CLEANUP
1246
1247
1248
1249 ## ------------------------------ ##
1250 ## parse.error=verbose overflow.  ##
1251 ## ------------------------------ ##
1252
1253 # Imagine the case where YYSTACK_ALLOC_MAXIMUM = YYSIZE_MAXIMUM and an
1254 # invocation of yysyntax_error has caused yymsg_alloc to grow to exactly
1255 # YYSTACK_ALLOC_MAXIMUM (perhaps because the normal doubling of size had
1256 # to be clipped to YYSTACK_ALLOC_MAXIMUM).  In an old version of yacc.c,
1257 # a subsequent invocation of yysyntax_error that overflows during its
1258 # size calculation would return YYSIZE_MAXIMUM to yyparse.  Then,
1259 # yyparse would invoke yyerror using the old contents of yymsg.
1260
1261 AT_SETUP([[parse.error=verbose overflow]])
1262
1263 AT_BISON_OPTION_PUSHDEFS
1264 AT_DATA_GRAMMAR([input.y],
1265 [[%code {
1266   ]AT_YYERROR_DECLARE[
1267   ]AT_YYLEX_DECLARE[
1268
1269   /* This prevents this test case from having to induce error messages
1270      large enough to overflow size_t.  */
1271   #define YYSIZE_T unsigned char
1272
1273   /* Bring in malloc and set EXIT_SUCCESS so yacc.c doesn't try to
1274      provide a malloc prototype using our YYSIZE_T.  */
1275   #include <stdlib.h>
1276   #ifndef EXIT_SUCCESS
1277   # define EXIT_SUCCESS 0
1278   #endif
1279
1280   /* Max depth is usually much smaller than YYSTACK_ALLOC_MAXIMUM, and
1281      we don't want gcc to warn everywhere this constant would be too big
1282      to make sense for our YYSIZE_T.  */
1283   #define YYMAXDEPTH 100
1284 }
1285
1286 %define parse.error verbose
1287
1288 %%
1289
1290 start: syntax_error1 check syntax_error2 ;
1291
1292 // Induce a syntax error message whose total length causes yymsg in
1293 // yyparse to be reallocated to size YYSTACK_ALLOC_MAXIMUM, which
1294 // should be 255.  Each token here is 64 bytes.
1295 syntax_error1:
1296   "123456789112345678921234567893123456789412345678951234567896123A"
1297 | "123456789112345678921234567893123456789412345678951234567896123B"
1298 | "123456789112345678921234567893123456789412345678951234567896123C"
1299 | error 'a' 'b' 'c'
1300 ;
1301
1302 check:
1303 {
1304   if (yymsg_alloc != YYSTACK_ALLOC_MAXIMUM
1305       || YYSTACK_ALLOC_MAXIMUM != YYSIZE_MAXIMUM
1306       || YYSIZE_MAXIMUM != 255)
1307     {
1308       fprintf (stderr,
1309                "The assumptions of this test group are no longer\n"
1310                "valid, so it may no longer catch the error it was\n"
1311                "designed to catch.  Specifically, the following\n"
1312                "values should all be 255:\n\n");
1313       fprintf (stderr, "  yymsg_alloc = %d\n", yymsg_alloc);
1314       fprintf (stderr, "  YYSTACK_ALLOC_MAXIMUM = %d\n",
1315                YYSTACK_ALLOC_MAXIMUM);
1316       fprintf (stderr, "  YYSIZE_MAXIMUM = %d\n", YYSIZE_MAXIMUM);
1317       YYABORT;
1318     }
1319 }
1320 ;
1321
1322 // Now overflow.
1323 syntax_error2:
1324   "123456789112345678921234567893123456789412345678951234567896123A"
1325 | "123456789112345678921234567893123456789412345678951234567896123B"
1326 | "123456789112345678921234567893123456789412345678951234567896123C"
1327 | "123456789112345678921234567893123456789412345678951234567896123D"
1328 | "123456789112345678921234567893123456789412345678951234567896123E"
1329 ;
1330
1331 %%
1332
1333 ]AT_YYERROR_DEFINE[
1334   /* Induce two syntax error messages (which requires full error
1335      recovery by shifting 3 tokens).  */
1336 ]AT_YYLEX_DEFINE(["abc"])[
1337 int
1338 main (void)
1339 {
1340   /* Push parsers throw away the message buffer between tokens, so skip
1341      this test under maintainer-push-check.  */
1342   if (YYPUSH)
1343     return 77;
1344   return yyparse ();
1345 }
1346 ]])
1347
1348 AT_BISON_CHECK([[-o input.c input.y]])
1349
1350 # gcc warns about tautologies and fallacies involving comparisons for
1351 # unsigned char.  However, it doesn't produce these same warnings for
1352 # size_t and many other types when the warnings would seem to make just
1353 # as much sense.  We ignore the warnings.
1354 [CFLAGS="$NO_WERROR_CFLAGS"]
1355 AT_COMPILE([[input]])
1356
1357 AT_PARSER_CHECK([[./input]], [[2]], [],
1358 [[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B or 123456789112345678921234567893123456789412345678951234567896123C
1359 syntax error
1360 memory exhausted
1361 ]])
1362 AT_BISON_OPTION_POPDEFS
1363 AT_CLEANUP
1364
1365
1366
1367 ## ------------------------ ##
1368 ## LAC: Exploratory stack.  ##
1369 ## ------------------------ ##
1370
1371 AT_SETUP([[LAC: Exploratory stack]])
1372
1373 m4_pushdef([AT_LAC_CHECK], [
1374
1375 AT_BISON_OPTION_PUSHDEFS([%debug $1])
1376
1377 AT_DATA_GRAMMAR([input.y],
1378 [[%code {
1379   ]AT_YYERROR_DECLARE[
1380   int yylex (]AT_PURE_IF([[YYSTYPE *]], [[void]])[);
1381 }
1382 %debug
1383 ]$1[
1384 %define parse.error verbose
1385 %token 'c'
1386
1387 %%
1388
1389 // default reductions in inconsistent states
1390 // v   v v   v v v v   v v v v v v v
1391 S: A B A A B A A A A B A A A A A A A B C C A A A A A A A A A A A A B ;
1392 //       ^                     ^                               ^
1393 // LAC reallocs
1394
1395 A: 'a' | /*empty*/ { printf ("inconsistent default reduction\n"); } ;
1396 B: 'b' ;
1397 C: /*empty*/ { printf ("consistent default reduction\n"); } ;
1398
1399 %%
1400 ]AT_YYERROR_DEFINE[
1401 int
1402 yylex (]AT_PURE_IF([[YYSTYPE *v]], [[void]])[)
1403 {
1404   static char const *input = "bbbbc";]AT_PURE_IF([[
1405   *v = 0;]])[
1406   return *input++;
1407 }
1408
1409 ]AT_MAIN_DEFINE[
1410 ]])
1411
1412 AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
1413                  -Dparse.lac.memory-trace=full \
1414                  -o input.c input.y]], [[0]], [],
1415 [[input.y: warning: 21 shift/reduce conflicts [-Wconflicts-sr]
1416 ]])
1417 AT_COMPILE([[input]])
1418 AT_PARSER_CHECK([[./input --debug > stdout.txt 2> stderr.txt]], [[1]])
1419
1420 # Make sure syntax error doesn't forget that 'a' is expected.  It would
1421 # be forgotten without lookahead correction.
1422 AT_CHECK([[grep 'syntax error,' stderr.txt]], [[0]],
1423 [[syntax error, unexpected 'c', expecting 'a' or 'b'
1424 ]])
1425
1426 # Check number of default reductions in inconsistent states to be sure
1427 # syntax error is detected before unnecessary reductions are performed.
1428 AT_CHECK([[$PERL -0777 -ne 'print s/inconsistent default reduction//g;' \
1429            < stdout.txt || exit 77]], [[0]], [[14]])
1430
1431 # Check number of default reductions in consistent states to be sure
1432 # it is performed before the syntax error is detected.
1433 AT_CHECK([[$PERL -0777 -ne 'print s/\bconsistent default reduction//g;' \
1434            < stdout.txt || exit 77]], [[0]], [[2]])
1435
1436 # Check number of reallocs to be sure reallocated memory isn't somehow
1437 # lost between LAC invocations.
1438 AT_CHECK([[$PERL -0777 -ne 'print s/\(realloc//g;' < stderr.txt \
1439            || exit 77]], [[0]], [[3]])
1440
1441 AT_BISON_OPTION_POPDEFS
1442 ])
1443
1444 AT_LAC_CHECK([[%define api.push-pull pull]])
1445 AT_LAC_CHECK([[%define api.push-pull pull %define api.pure]])
1446 AT_LAC_CHECK([[%define api.push-pull both]])
1447 AT_LAC_CHECK([[%define api.push-pull both %define api.pure]])
1448
1449 m4_popdef([AT_LAC_CHECK])
1450
1451 AT_CLEANUP
1452
1453
1454
1455 ## ------------------------ ##
1456 ## LAC: Memory exhaustion.  ##
1457 ## ------------------------ ##
1458
1459 AT_SETUP([[LAC: Memory exhaustion]])
1460
1461 m4_pushdef([AT_LAC_CHECK],
1462 [AT_BISON_OPTION_PUSHDEFS([%debug])
1463 AT_DATA_GRAMMAR([input.y],
1464 [[%code {
1465   ]AT_YYERROR_DECLARE[
1466   ]AT_YYLEX_DECLARE[
1467   #define YYMAXDEPTH 8
1468 }
1469 %debug
1470 %error-verbose
1471
1472 %%
1473
1474 S: A A A A A A A A A ;
1475 A: /*empty*/ | 'a' ;
1476
1477 %%
1478 ]AT_YYERROR_DEFINE[
1479 ]AT_YYLEX_DEFINE(["$1"])[
1480 ]AT_MAIN_DEFINE[
1481 ]])
1482
1483 AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \
1484                  -o input.c input.y]], [[0]], [],
1485 [[input.y: warning: 8 shift/reduce conflicts [-Wconflicts-sr]
1486 ]])
1487 AT_COMPILE([[input]])
1488 AT_BISON_OPTION_POPDEFS
1489 ])
1490
1491 # Check for memory exhaustion during parsing.
1492 AT_LAC_CHECK([])
1493 AT_PARSER_CHECK([[./input --debug]], [[2]], [],
1494 [[Starting parse
1495 Entering state 0
1496 Reading a token: Now at end of input.
1497 LAC: initial context established for $end
1498 LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded)
1499 memory exhausted
1500 Cleanup: discarding lookahead token $end ()
1501 Stack now 0
1502 ]])
1503
1504 # Induce an immediate syntax error with an undefined token, and check
1505 # for memory exhaustion while building syntax error message.
1506 AT_LAC_CHECK([z], [[0]])
1507 AT_PARSER_CHECK([[./input --debug]], [[2]], [],
1508 [[Starting parse
1509 Entering state 0
1510 Reading a token: Next token is token $undefined ()
1511 LAC: initial context established for $undefined
1512 LAC: checking lookahead $undefined: Always Err
1513 Constructing syntax error message
1514 LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded)
1515 syntax error
1516 memory exhausted
1517 Cleanup: discarding lookahead token $undefined ()
1518 Stack now 0
1519 ]])
1520
1521 m4_popdef([AT_LAC_CHECK])
1522
1523 AT_CLEANUP
1524
1525
1526 ## ---------------------- ##
1527 ## Lex and parse params.  ##
1528 ## ---------------------- ##
1529
1530 # AT_TEST(SKELETON)
1531 # -----------------
1532 # Check that the identifier of the params is properly fetched
1533 # even when there are trailing blanks.
1534
1535 m4_pushdef([AT_TEST],
1536 [AT_SETUP([[Lex and parse params: $1]])
1537
1538 ## FIXME: Improve parsing of parse-param.
1539 AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1" %parse-param { int x } %parse-param { int y }])
1540
1541 AT_DATA_GRAMMAR([input.y],
1542 [[%locations
1543 %skeleton "$1"
1544 %union { int ival; }
1545 %parse-param { int x }
1546 // Spaces, tabs, and new lines.
1547 %parse-param { @&t@
1548 @tb@ int y@tb@ @&t@
1549          @&t@
1550  @&t@
1551 }
1552
1553 %{
1554   ]AT_YYERROR_DECLARE[
1555   ]AT_YYLEX_DECLARE[
1556 %}
1557
1558 %%
1559 exp: 'a' { fprintf (stdout, "x: %d, y: %d\n", x, y); };
1560 %%
1561 ]AT_YYERROR_DEFINE[
1562 ]AT_YYLEX_DEFINE(["a"])[
1563
1564 ]AT_SKEL_CC_IF(
1565 [int
1566 yyparse (int x, int y)
1567 {
1568   yy::parser parser(x, y);
1569   return parser.parse ();
1570 }
1571 ])[
1572
1573 int
1574 main (void)
1575 {
1576   return yyparse(1, 2);
1577 }
1578 ]])
1579
1580 AT_FULL_COMPILE([input])
1581 AT_PARSER_CHECK([./input], 0, [[x: 1, y: 2
1582 ]])
1583 AT_BISON_OPTION_POPDEFS
1584
1585 AT_CLEANUP
1586 ])
1587
1588 ## FIXME: test Java, and iterate over skeletons.
1589 AT_TEST([yacc.c])
1590 AT_TEST([glr.c])
1591 AT_TEST([lalr1.cc])
1592 AT_TEST([glr.cc])
1593
1594 m4_popdef([AT_TEST])
1595
1596
1597 ## ----------------------- ##
1598 ## stdio.h is not needed.  ##
1599 ## ----------------------- ##
1600
1601 # At some point, by accident, yy_location_print_ was using fprintf and
1602 # FILE which are from stdio.h, which we do not require.
1603 AT_SETUP([[stdio.h is not needed]])
1604
1605 AT_BISON_OPTION_PUSHDEFS
1606
1607 AT_DATA_GRAMMAR([input.y],
1608 [[%locations
1609 %code
1610 {
1611   static int yylex (void) { return 0; }
1612   static void yyerror (const char* msg) { (void) msg; }
1613 }
1614 %%
1615 exp: {}
1616 %%
1617 ]AT_MAIN_DEFINE[
1618 ]])
1619
1620 AT_FULL_COMPILE([input])
1621
1622 AT_BISON_OPTION_POPDEFS
1623
1624 AT_CLEANUP