tests/input.at

   1 # Checking the Bison scanner.                    -*- Autotest -*-
   2
   3 # Copyright (C) 2002-2012 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([[Input Processing.]])
  19
  20 # Mostly test that we are robust to mistakes.
  21
  22
  23 ## ------------ ##
  24 ## Invalid $n.  ##
  25 ## ------------ ##
  26
  27 AT_SETUP([Invalid $n and @n])
  28
  29 AT_DATA([input.y],
  30 [[%%
  31 exp: { $$ = $1 ; };
  32 exp: { @$ = @1 ; };
  33 ]])
  34
  35 AT_BISON_CHECK([input.y], [1], [],
  36 [[input.y:2.13-14: integer out of range: '$1'
  37 input.y:3.13-14: integer out of range: '@1'
  38 ]])
  39
  40 AT_CLEANUP
  41
  42
  43 ## -------------- ##
  44 ## Type Clashes.  ##
  45 ## -------------- ##
  46
  47 AT_SETUP([Type Clashes])
  48
  49 AT_DATA([input.y],
  50 [[%union { int bar; }
  51 %token foo
  52 %type <bar> exp
  53 %%
  54 exp: foo { $$; } foo { $2; } foo
  55    | foo
  56    | /* Empty. */
  57    ;
  58 ]])
  59
  60 AT_BISON_CHECK([input.y], [1], [],
  61 [[input.y:5.12-13: $$ for the midrule at $2 of 'exp' has no declared type
  62 input.y:5.24-25: $2 of 'exp' has no declared type
  63 input.y:5.6-32: warning: type clash on default action: <bar> != <> [-Wother]
  64 input.y:6.6-8: warning: type clash on default action: <bar> != <> [-Wother]
  65 input.y:7.5: warning: empty rule for typed nonterminal, and no action [-Wother]
  66 ]])
  67
  68 AT_CLEANUP
  69
  70
  71 # _AT_UNUSED_VALUES_DECLARATIONS()
  72 # --------------------------------
  73 # Generate the token, type, and destructor
  74 # declarations for the unused values tests.
  75 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
  76 [[[%token <integer> INT;
  77 %type <integer> a b c d e f g h i j k l;
  78 %destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
  79
  80
  81 # AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER, CHECK_MIDRULE_VALUES)
  82 # ----------------------------------------------------------------
  83 # Generate a grammar to test unused values, compile it, run it.  If
  84 # DECLARATIONS_AFTER is set, then the token, type, and destructor
  85 # declarations are generated after the rules rather than before.  If
  86 # CHECK_MIDRULE_VALUES is set, then --warnings=midrule-values is set.
  87 m4_define([AT_CHECK_UNUSED_VALUES],
  88 [AT_DATA([input.y],
  89 m4_ifval($1, [
  90
  91
  92 ], [_AT_UNUSED_VALUES_DECLARATIONS
  93 ])[[%%
  94 start:
  95   'a' a { $]2[; } | 'b' b { $]2[; } | 'c' c { $]2[; } | 'd' d { $]2[; }
  96 | 'e' e { $]2[; } | 'f' f { $]2[; } | 'g' g { $]2[; } | 'h' h { $]2[; }
  97 | 'i' i { $]2[; } | 'j' j { $]2[; } | 'k' k { $]2[; } | 'l' l { $]2[; }
  98 ;
  99
 100 a: INT | INT { } INT { } INT { };
 101 b: INT | /* empty */;
 102 c: INT | INT { $]1[; } INT { $<integer>2; } INT { $<integer>4; };
 103 d: INT | INT { } INT { $]1[; } INT { $<integer>2; };
 104 e: INT | INT { } INT {  } INT { $]1[; };
 105 f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
 106 g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
 107 h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
 108 i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
 109 j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
 110 k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
 111 l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
 112 _AT_UNUSED_VALUES_DECLARATIONS])
 113 )
 114
 115 AT_BISON_CHECK(m4_ifval($2, [ --warnings=midrule-values ])[ input.y], [0], [],
 116 [[input.y:11.10-32: warning: unset value: $]$[ [-Wother]
 117 input.y:11.10-32: warning: unused value: $]1[ [-Wother]
 118 input.y:11.10-32: warning: unused value: $]3[ [-Wother]
 119 input.y:11.10-32: warning: unused value: $]5[ [-Wother]
 120 input.y:12.9: warning: empty rule for typed nonterminal, and no action [-Wother]
 121 ]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $$ [-Wmidrule-values]
 122 input.y:13.26-41: warning: unset value: $$ [-Wmidrule-values]
 123 ]]])[[input.y:13.10-62: warning: unset value: $]$[ [-Wother]
 124 input.y:13.10-62: warning: unused value: $]3[ [-Wother]
 125 input.y:13.10-62: warning: unused value: $]5[ [-Wother]
 126 ]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$ [-Wmidrule-values]
 127 ]]])[[input.y:14.10-49: warning: unset value: $]$[ [-Wother]
 128 input.y:14.10-49: warning: unused value: $]3[ [-Wother]
 129 input.y:14.10-49: warning: unused value: $]5[ [-Wother]
 130 input.y:15.10-37: warning: unset value: $]$[ [-Wother]
 131 input.y:15.10-37: warning: unused value: $]3[ [-Wother]
 132 input.y:15.10-37: warning: unused value: $]5[ [-Wother]
 133 input.y:17.10-58: warning: unset value: $]$[ [-Wother]
 134 input.y:17.10-58: warning: unused value: $]1[ [-Wother]
 135 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[ [-Wmidrule-values]
 136 ]]])[[input.y:17.10-58: warning: unused value: $]3[ [-Wother]
 137 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[ [-Wmidrule-values]
 138 ]]])[[input.y:17.10-58: warning: unused value: $]5[ [-Wother]
 139 input.y:18.10-72: warning: unset value: $]$[ [-Wother]
 140 input.y:18.10-72: warning: unused value: $]1[ [-Wother]
 141 input.y:18.10-72: warning: unused value: $]3[ [-Wother]
 142 ]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[ [-Wmidrule-values]
 143 ]]])[[input.y:18.10-72: warning: unused value: $]5[ [-Wother]
 144 ]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[ [-Wmidrule-values]
 145 ]]])[[input.y:21.10-68: warning: unset value: $]$[ [-Wother]
 146 input.y:21.10-68: warning: unused value: $]1[ [-Wother]
 147 input.y:21.10-68: warning: unused value: $]2[ [-Wother]
 148 ]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[ [-Wmidrule-values]
 149 ]]]))])
 150
 151
 152 ## --------------- ##
 153 ## Unused values.  ##
 154 ## --------------- ##
 155
 156 AT_SETUP([Unused values])
 157 AT_CHECK_UNUSED_VALUES
 158 AT_CHECK_UNUSED_VALUES(, [1])
 159 AT_CLEANUP
 160
 161
 162 ## ------------------------------------------ ##
 163 ## Unused values before symbol declarations.  ##
 164 ## ------------------------------------------ ##
 165
 166 AT_SETUP([Unused values before symbol declarations])
 167 AT_CHECK_UNUSED_VALUES([1])
 168 AT_CHECK_UNUSED_VALUES([1], [1])
 169 AT_CLEANUP
 170
 171
 172 ## --------------------------------------------- ##
 173 ## Default %printer and %destructor redeclared.  ##
 174 ## --------------------------------------------- ##
 175
 176 AT_SETUP([Default %printer and %destructor redeclared])
 177
 178 AT_DATA([[input.y]],
 179 [[%destructor { destroy ($$); } <*> <*>
 180 %printer { print ($$); } <*> <*>
 181
 182 %destructor { destroy ($$); } <*>
 183 %printer { print ($$); } <*>
 184
 185 %destructor { destroy ($$); } <> <>
 186 %printer { print ($$); } <> <>
 187
 188 %destructor { destroy ($$); } <>
 189 %printer { print ($$); } <>
 190
 191 %%
 192
 193 start: ;
 194
 195 %destructor { destroy ($$); } <*>;
 196 %printer { print ($$); } <*>;
 197
 198 %destructor { destroy ($$); } <>;
 199 %printer { print ($$); } <>;
 200 ]])
 201
 202 AT_BISON_CHECK([input.y], [1], [],
 203 [[input.y:1.13-29: %destructor redeclaration for <*>
 204 input.y:1.13-29: previous declaration
 205 input.y:2.10-24: %printer redeclaration for <*>
 206 input.y:2.10-24: previous declaration
 207 input.y:4.13-29: %destructor redeclaration for <*>
 208 input.y:1.13-29: previous declaration
 209 input.y:5.10-24: %printer redeclaration for <*>
 210 input.y:2.10-24: previous declaration
 211 input.y:7.13-29: %destructor redeclaration for <>
 212 input.y:7.13-29: previous declaration
 213 input.y:8.10-24: %printer redeclaration for <>
 214 input.y:8.10-24: previous declaration
 215 input.y:10.13-29: %destructor redeclaration for <>
 216 input.y:7.13-29: previous declaration
 217 input.y:11.10-24: %printer redeclaration for <>
 218 input.y:8.10-24: previous declaration
 219 input.y:17.13-29: %destructor redeclaration for <*>
 220 input.y:4.13-29: previous declaration
 221 input.y:18.10-24: %printer redeclaration for <*>
 222 input.y:5.10-24: previous declaration
 223 input.y:20.13-29: %destructor redeclaration for <>
 224 input.y:10.13-29: previous declaration
 225 input.y:21.10-24: %printer redeclaration for <>
 226 input.y:11.10-24: previous declaration
 227 ]])
 228
 229 AT_CLEANUP
 230
 231
 232 ## ---------------------------------------------- ##
 233 ## Per-type %printer and %destructor redeclared.  ##
 234 ## ---------------------------------------------- ##
 235
 236 AT_SETUP([Per-type %printer and %destructor redeclared])
 237
 238 AT_DATA([[input.y]],
 239 [[%destructor { destroy ($$); } <field1> <field2>
 240 %printer { print ($$); } <field1> <field2>
 241
 242 %destructor { destroy ($$); } <field1> <field1>
 243 %printer { print ($$); } <field2> <field2>
 244
 245 %%
 246
 247 start: ;
 248
 249 %destructor { destroy ($$); } <field2> <field1>;
 250 %printer { print ($$); } <field2> <field1>;
 251 ]])
 252
 253 AT_BISON_CHECK([input.y], [1], [],
 254 [[input.y:4.13-29: %destructor redeclaration for <field1>
 255 input.y:1.13-29: previous declaration
 256 input.y:4.13-29: %destructor redeclaration for <field1>
 257 input.y:4.13-29: previous declaration
 258 input.y:5.10-24: %printer redeclaration for <field2>
 259 input.y:2.10-24: previous declaration
 260 input.y:5.10-24: %printer redeclaration for <field2>
 261 input.y:5.10-24: previous declaration
 262 input.y:11.13-29: %destructor redeclaration for <field1>
 263 input.y:4.13-29: previous declaration
 264 input.y:11.13-29: %destructor redeclaration for <field2>
 265 input.y:1.13-29: previous declaration
 266 input.y:12.10-24: %printer redeclaration for <field1>
 267 input.y:2.10-24: previous declaration
 268 input.y:12.10-24: %printer redeclaration for <field2>
 269 input.y:5.10-24: previous declaration
 270 ]])
 271
 272 AT_CLEANUP
 273
 274 ## ----------------------------------------------------- ##
 275 ## Undeclared symbols used for a printer or destructor.  ##
 276 ## ----------------------------------------------------- ##
 277
 278 AT_SETUP([Undeclared symbols used for a printer or destructor])
 279
 280 AT_DATA([[input.y]],
 281 [[%printer {} foo baz
 282 %destructor {} bar
 283
 284 %%
 285 exp: bar;
 286 ]])
 287
 288 AT_BISON_CHECK([input.y], [1], [],
 289 [[input.y:2.16-18: symbol bar is used, but is not defined as a token and has no rules
 290 input.y:1.17-19: warning: symbol baz is used, but is not defined as a token and has no rules [-Wother]
 291 input.y:1.13-15: warning: symbol foo is used, but is not defined as a token and has no rules [-Wother]
 292 ]])
 293
 294 AT_CLEANUP
 295
 296
 297 ## ----------------------------------------------------- ##
 298 ## Unassociated types used for a printer or destructor.  ##
 299 ## ----------------------------------------------------- ##
 300
 301 AT_SETUP([Unassociated types used for a printer or destructor])
 302
 303 AT_DATA([[input.y]],
 304 [[%token <type1> tag1
 305 %type <type2> tag2
 306
 307 %printer { } <type1> <type3>
 308 %destructor { } <type2> <type4>
 309
 310 %%
 311
 312 exp: tag1 { $1; }
 313    | tag2 { $1; }
 314
 315 tag2: "a" { $$; }
 316 ]])
 317
 318 AT_BISON_CHECK([input.y], [0], [],
 319 [[input.y:4.22-28: warning: type <type3> is used, but is not associated to any symbol [-Wother]
 320 input.y:5.25-31: warning: type <type4> is used, but is not associated to any symbol [-Wother]
 321 ]])
 322
 323 AT_CLEANUP
 324
 325
 326 ## --------------------------------- ##
 327 ## Useless printers or destructors.  ##
 328 ## --------------------------------- ##
 329
 330 AT_SETUP([Useless printers or destructors])
 331
 332 # AT_TEST([INPUT], [STDERR])
 333 # --------------------------
 334 m4_pushdef([AT_TEST],
 335 [AT_DATA([[input.y]],
 336 [$1
 337 ])
 338 AT_BISON_CHECK([input.y], [0], [], [$2
 339 ])])
 340
 341 AT_TEST([[%token <type1> token1
 342 %token <type2> token2
 343 %token <type3> token3
 344 %token <type4> token4
 345 %token <type5> token51 token52
 346 %token <type6> token61 token62
 347 %token <type7> token7
 348
 349 %printer {} token1
 350 %destructor {} token2
 351 %printer {} token51
 352 %destructor {} token61
 353
 354 %printer {} token7
 355
 356 %printer {} <type1>
 357 %destructor {} <type2>
 358 %printer {} <type3>
 359 %destructor {} <type4>
 360
 361 %printer {} <type5>
 362 %destructor {} <type6>
 363
 364 %destructor {} <type7>
 365
 366 %%
 367 exp: "a";]],
 368 [[input.y:16.13-19: warning: useless %printer for type <type1> [-Wother]
 369 input.y:17.16-22: warning: useless %destructor for type <type2> [-Wother]]])
 370
 371 # If everybody is typed, <> is useless.
 372 AT_TEST([[%type <type> exp
 373 %token <type> a
 374 %printer {} <> <*>
 375 %%
 376 exp: a;]],
 377 [[input.y:3.13-14: warning: useless %printer for type <> [-Wother]]])
 378
 379 # If nobody is typed, <*> is useless.
 380 AT_TEST([[%token a
 381 %printer {} <> <*>
 382 %%
 383 exp: a;]],
 384 [[input.y:2.16-18: warning: useless %printer for type <*> [-Wother]]])
 385
 386 m4_popdef([AT_TEST])
 387
 388 AT_CLEANUP
 389
 390
 391 ## ---------------------------------------- ##
 392 ## Unused values with default %destructor.  ##
 393 ## ---------------------------------------- ##
 394
 395 AT_SETUP([Unused values with default %destructor])
 396
 397 AT_DATA([[input.y]],
 398 [[%destructor { destroy ($$); } <>
 399 %type <tag> tagged
 400
 401 %%
 402
 403 start: end end tagged tagged { $<tag>1; $3; } ;
 404 end: { } ;
 405 tagged: { } ;
 406 ]])
 407
 408 AT_BISON_CHECK([input.y], [0], [],
 409 [[input.y:6.8-45: warning: unset value: $$ [-Wother]
 410 input.y:6.8-45: warning: unused value: $2 [-Wother]
 411 input.y:7.6-8: warning: unset value: $$ [-Wother]
 412 ]])
 413
 414 AT_DATA([[input.y]],
 415 [[%destructor { destroy ($$); } <*>
 416 %type <tag> tagged
 417
 418 %%
 419
 420 start: end end tagged tagged { $<tag>1; $3; } ;
 421 end: { } ;
 422 tagged: { } ;
 423 ]])
 424
 425 AT_BISON_CHECK([input.y], [0], [],
 426 [[input.y:6.8-45: warning: unused value: $4 [-Wother]
 427 input.y:8.9-11: warning: unset value: $$ [-Wother]
 428 ]])
 429
 430 AT_CLEANUP
 431
 432
 433 ## ----------------------------------------- ##
 434 ## Unused values with per-type %destructor.  ##
 435 ## ----------------------------------------- ##
 436
 437 AT_SETUP([Unused values with per-type %destructor])
 438
 439 AT_DATA([[input.y]],
 440 [[%destructor { destroy ($$); } <field1>
 441 %type <field1> start end
 442
 443 %%
 444
 445 start: end end { $1; } ;
 446 end: { }  ;
 447 ]])
 448
 449 AT_BISON_CHECK([input.y], [0], [],
 450 [[input.y:6.8-22: warning: unset value: $$ [-Wother]
 451 input.y:6.8-22: warning: unused value: $2 [-Wother]
 452 input.y:7.6-8: warning: unset value: $$ [-Wother]
 453 ]])
 454
 455 AT_CLEANUP
 456
 457
 458 ## ---------------------- ##
 459 ## Incompatible Aliases.  ##
 460 ## ---------------------- ##
 461
 462 AT_SETUP([Incompatible Aliases])
 463
 464 AT_DATA([input.y],
 465 [[%token foo "foo"
 466
 467 %type <bar>       foo
 468 %printer {bar}    foo
 469 %destructor {bar} foo
 470 %left             foo
 471
 472 %type <baz>       "foo"
 473 %printer {baz}    "foo"
 474 %destructor {baz} "foo"
 475 %left             "foo"
 476
 477 %%
 478 exp: foo;
 479 ]])
 480
 481 AT_BISON_CHECK([input.y], [1], [],
 482 [[input.y:8.7-11: %type redeclaration for foo
 483 input.y:3.7-11: previous declaration
 484 input.y:10.13-17: %destructor redeclaration for foo
 485 input.y:5.13-17: previous declaration
 486 input.y:9.10-14: %printer redeclaration for foo
 487 input.y:4.10-14: previous declaration
 488 input.y:11.1-5: %left redeclaration for foo
 489 input.y:6.1-5: previous declaration
 490 ]])
 491
 492 AT_CLEANUP
 493
 494
 495
 496 ## ----------------------- ##
 497 ## Torturing the Scanner.  ##
 498 ## ----------------------- ##
 499
 500 # Be sure to compile and run, so that the C compiler checks what
 501 # we do.
 502
 503 AT_SETUP([Torturing the Scanner])
 504
 505 AT_BISON_OPTION_PUSHDEFS
 506 AT_DATA([input.y], [])
 507 AT_BISON_CHECK([input.y], [1], [],
 508 [[input.y:1.1: syntax error, unexpected end of file
 509 ]])
 510
 511
 512 AT_DATA([input.y],
 513 [{}
 514 ])
 515 AT_BISON_CHECK([input.y], [1], [],
 516 [[input.y:1.1-2: syntax error, unexpected {...}
 517 ]])
 518
 519
 520 AT_DATA_GRAMMAR([input.y],
 521 [[%{
 522 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 523 const char *foo = "So %{ and %} can be here too.";
 524
 525 #if 0
 526 /* These examples test Bison while not stressing C compilers too much.
 527    Many C compilers mishandle backslash-newlines, so this part of the
 528    test is inside "#if 0".  The comment and string are written so that
 529    the "#endif" will be seen regardless of the C compiler bugs that we
 530    know about, namely:
 531
 532      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 533      comment.
 534
 535      The Apple Darwin compiler (as of late 2002) mishandles
 536      \\[newline]' within a character constant.
 537
 538    */
 539
 540 /\
 541 * A comment with backslash-newlines in it. %} *\
 542 \
 543 /
 544 /* { Close the above comment, if the C compiler mishandled it.  */
 545
 546 char str[] = "\\
 547 " A string with backslash-newlines in it %{ %} \\
 548 \
 549 "";
 550
 551 char apostrophe = '\'';
 552 #endif
 553
 554 #include <stdio.h>
 555 #include <stdlib.h>
 556 #include <assert.h>
 557 %}
 558 /* %{ and %} can be here too. */
 559
 560 %{
 561 /* Exercise pre-prologue dependency to %union.  */
 562 typedef int value;
 563 %}
 564
 565 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 566
 567 /* Also exercise %union. */
 568 %union
 569 {
 570   value ival; /* A comment to exercise an old bug. */
 571 };
 572
 573
 574 /* Exercise post-prologue dependency to %union.  */
 575 %{
 576 static YYSTYPE value_as_yystype (value val);
 577
 578 /* Exercise quotes in declarations.  */
 579 char quote[] = "@:>@@:>@,";
 580 %}
 581
 582 %{
 583 ]AT_YYERROR_DECLARE[
 584 ]AT_YYLEX_DECLARE[
 585 %}
 586
 587 %type <ival> '@<:@'
 588
 589 /* Exercise quotes in strings.  */
 590 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 591
 592 %%
 593 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 594 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 595   {
 596     /* Exercise quotes in braces.  */
 597     char tmp[] = "@<:@%c@:>@,\n";
 598     printf (tmp, $1);
 599   }
 600 ;
 601
 602 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 603 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 604 output.or.oline.opt: ;|oline;;|output;;;
 605 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 606 %%
 607 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 608
 609 static YYSTYPE
 610 value_as_yystype (value val)
 611 {
 612   YYSTYPE res;
 613   res.ival = val;
 614   return res;
 615 }
 616 ]AT_YYERROR_DEFINE[
 617 static int
 618 yylex (void)
 619 {
 620   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
 621 #output "; /* "
 622   */
 623   static size_t toknum;
 624   assert (toknum < sizeof input);
 625   yylval = value_as_yystype (input[toknum]);
 626   return input[toknum++];
 627 }
 628 ]])
 629
 630 # Pacify Emacs'font-lock-mode: "
 631
 632 AT_DATA([main.c],
 633 [[typedef int value;
 634 #include "input.h"
 635
 636 int yyparse (void);
 637
 638 int
 639 main (void)
 640 {
 641   return yyparse ();
 642 }
 643 ]])
 644 AT_BISON_OPTION_POPDEFS
 645
 646 AT_BISON_CHECK([-d -v -o input.c input.y])
 647 AT_COMPILE([input.o])
 648 AT_COMPILE([main.o])
 649 AT_COMPILE([input], [input.o main.o])
 650 AT_PARSER_CHECK([./input], 0,
 651 [[[@<:@],
 652 ]])
 653
 654 AT_CLEANUP
 655
 656
 657 ## ---------------------- ##
 658 ## Typed symbol aliases.  ##
 659 ## ---------------------- ##
 660
 661 AT_SETUP([Typed symbol aliases])
 662
 663 # Bison 2.0 broke typed symbol aliases - ensure they work.
 664
 665 AT_DATA_GRAMMAR([input.y],
 666 [[%union
 667 {
 668   int val;
 669 };
 670 %token <val> MY_TOKEN "MY TOKEN"
 671 %type <val> exp
 672 %%
 673 exp: "MY TOKEN";
 674 %%
 675 ]])
 676
 677 AT_BISON_CHECK([-o input.c input.y])
 678
 679 AT_CLEANUP
 680
 681
 682 ## --------- ##
 683 ## Require.  ##
 684 ## --------- ##
 685
 686 m4_define([AT_CHECK_REQUIRE],
 687 [AT_SETUP([Require $1])
 688 AT_DATA_GRAMMAR([input.y],
 689 [[%require "$1";
 690 %%
 691 empty_file:;
 692 ]])
 693 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
 694 AT_CLEANUP
 695 ])
 696
 697 AT_CHECK_REQUIRE(1.0, 0)
 698 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 699 ## FIXME: Some day augment this version number.
 700 AT_CHECK_REQUIRE(100.0, 63)
 701
 702
 703 ## ------------------------------------- ##
 704 ## String aliases for character tokens.  ##
 705 ## ------------------------------------- ##
 706
 707 AT_SETUP([String aliases for character tokens])
 708
 709 # Bison once thought a character token and its alias were different
 710 # symbols with the same user token number.
 711
 712 AT_DATA_GRAMMAR([input.y],
 713 [[%token 'a' "a"
 714 %%
 715 start: 'a';
 716 %%
 717 ]])
 718
 719 AT_BISON_CHECK([-o input.c input.y])
 720
 721 AT_CLEANUP
 722
 723
 724 ## -------------- ##
 725 ## Symbol names.  ##
 726 ## -------------- ##
 727
 728 AT_SETUP([Symbols])
 729
 730 AT_BISON_OPTION_PUSHDEFS
 731 AT_DATA_GRAMMAR([input.y],
 732 [[%token WITH-DASH
 733 %token WITHOUT_DASH "WITHOUT-DASH"
 734 %token WITH.PERIOD
 735 %token WITHOUT_PERIOD "WITHOUT.PERIOD"
 736 %code {
 737   ]AT_YYERROR_DECLARE[
 738   ]AT_YYLEX_DECLARE[
 739 }
 740 %%
 741 start: with-dash without_dash with.period without_period;
 742 with-dash: WITH-DASH;
 743 without_dash: "WITHOUT-DASH";
 744 with.period: WITH.PERIOD;
 745 without_period: "WITHOUT.PERIOD";
 746 %%
 747 ]AT_YYERROR_DEFINE[
 748 ]AT_YYLEX_DEFINE[
 749 ]])
 750 AT_BISON_OPTION_POPDEFS
 751
 752 # POSIX Yacc accept periods, but not dashes.
 753 AT_BISON_CHECK([--yacc input.y], [1], [],
 754 [[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Wyacc]
 755 input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash [-Wyacc]
 756 ]])
 757
 758 # So warn about them.
 759 AT_BISON_CHECK([-Wyacc input.y], [], [],
 760 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Wyacc]
 761 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash [-Wyacc]
 762 ]])
 763
 764 # Dashes are fine for GNU Bison.
 765 AT_BISON_CHECK([-o input.c input.y])
 766
 767 # Make sure we don't export silly token identifiers with periods or dashes.
 768 AT_COMPILE([input.o])
 769
 770
 771 # Periods are genuine letters, they can start identifiers.
 772 # Digits and dashes cannot.
 773 AT_DATA_GRAMMAR([input.y],
 774 [[%token .GOOD
 775          -GOOD
 776          1NV4L1D
 777          -123
 778 %%
 779 start: .GOOD GOOD
 780 ]])
 781 AT_BISON_CHECK([-o input.c input.y], [1], [],
 782 [[input.y:10.10: invalid character: '-'
 783 input.y:11.10-16: invalid identifier: '1NV4L1D'
 784 input.y:12.10: invalid character: '-'
 785 ]])
 786
 787 AT_CLEANUP
 788
 789
 790 ## ----------------- ##
 791 ## Numbered tokens.  ##
 792 ## ----------------- ##
 793
 794 AT_SETUP([Numbered tokens])
 795
 796 AT_DATA_GRAMMAR([redecl.y],
 797 [[%token DECIMAL_1     11259375
 798          HEXADECIMAL_1 0xabcdef
 799          HEXADECIMAL_2 0xFEDCBA
 800          DECIMAL_2     16702650
 801 %%
 802 start: DECIMAL_1 HEXADECIMAL_2;
 803 ]])
 804
 805 AT_BISON_CHECK([redecl.y], [1], [],
 806 [[redecl.y:10.10-22: user token number 11259375 redeclaration for HEXADECIMAL_1
 807 redecl.y:9.8-16: previous declaration for DECIMAL_1
 808 redecl.y:12.10-18: user token number 16702650 redeclaration for DECIMAL_2
 809 redecl.y:11.10-22: previous declaration for HEXADECIMAL_2
 810 ]])
 811
 812 AT_DATA_GRAMMAR([too-large.y],
 813 [[%token TOO_LARGE_DEC 999999999999999999999
 814          TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
 815 %%
 816 start: TOO_LARGE_DEC TOO_LARGE_HEX
 817 %%
 818 ]])
 819
 820 AT_BISON_CHECK([too-large.y], [1], [],
 821 [[too-large.y:9.22-42: integer out of range: '999999999999999999999'
 822 too-large.y:10.24-44: integer out of range: '0xFFFFFFFFFFFFFFFFFFF'
 823 ]])
 824
 825 AT_CLEANUP
 826
 827
 828 ## --------------------- ##
 829 ## Unclosed constructs.  ##
 830 ## --------------------- ##
 831
 832 AT_SETUP([Unclosed constructs])
 833
 834 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed
 835 # constructs, so they were prepended to whatever it STRING_GROW'ed
 836 # next.  It also threw them away rather than returning them to the
 837 # parser.  The effect was confusing subsequent error messages.
 838
 839 AT_DATA([input.y],
 840 [[%token A "a
 841 %token B "b"
 842 %token AB "ab" // Used to complain that "ab" was already used.
 843 %token C '1
 844 %token TWO "2"
 845 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
 846
 847 %%
 848
 849 start: ;
 850
 851 // Used to report a syntax error because it didn't see any kind of symbol
 852 // identifier.
 853 %type <f> 'a
 854 ;
 855 %type <f> "a
 856 ;
 857 // Used to report a syntax error because it didn't see braced code.
 858 %destructor { free ($$)
 859 ]])
 860
 861 AT_BISON_CHECK([-o input.c input.y], 1, [],
 862 [[input.y:1.10-2.0: missing '"' at end of line
 863 input.y:4.10-5.0: missing "'" at end of line
 864 input.y:14.11-15.0: missing "'" at end of line
 865 input.y:16.11-17.0: missing '"' at end of line
 866 input.y:19.13-20.0: missing '}' at end of file
 867 input.y:20.1: syntax error, unexpected end of file
 868 ]])
 869
 870 AT_CLEANUP
 871
 872
 873 ## ------------------------- ##
 874 ## %start after first rule.  ##
 875 ## ------------------------- ##
 876
 877 AT_SETUP([%start after first rule])
 878
 879 # Bison once complained that a %start after the first rule was a
 880 # redeclaration of the start symbol.
 881
 882 AT_DATA([input.y],
 883 [[%%
 884 false_start: ;
 885 start: false_start ;
 886 %start start;
 887 ]])
 888
 889 AT_BISON_CHECK([-o input.c input.y])
 890
 891 AT_CLEANUP
 892
 893
 894 ## --------------------- ##
 895 ## %prec takes a token.  ##
 896 ## --------------------- ##
 897
 898 AT_SETUP([%prec takes a token])
 899
 900 # Bison once allowed %prec sym where sym was a nonterminal.
 901
 902 AT_DATA([input.y],
 903 [[%%
 904 start: PREC %prec PREC ;
 905 PREC: ;
 906 ]])
 907
 908 AT_BISON_CHECK([input.y], [1], [],
 909 [[input.y:3.1-4: rule given for PREC, which is a token
 910 ]])
 911
 912 AT_CLEANUP
 913
 914
 915 ## ------------------------------- ##
 916 ## %prec's token must be defined.  ##
 917 ## ------------------------------- ##
 918
 919 AT_SETUP([[%prec's token must be defined]])
 920
 921 # According to POSIX, a %prec token must be defined separately.
 922
 923 AT_DATA([[input.y]],
 924 [[%%
 925 start: %prec PREC ;
 926 ]])
 927
 928 AT_BISON_CHECK([[input.y]], [[0]], [],
 929 [[input.y:2.8-17: warning: token for %prec is not defined: PREC [-Wother]
 930 ]])
 931
 932 AT_CLEANUP
 933
 934
 935 ## -------------------------------- ##
 936 ## Reject unused %code qualifiers.  ##
 937 ## -------------------------------- ##
 938
 939 AT_SETUP([Reject unused %code qualifiers])
 940
 941 AT_DATA([input-c.y],
 942 [[%code q {}
 943 %code bad {}
 944 %code bad {}
 945 %code format {}
 946 %%
 947 start: ;
 948 ]])
 949 AT_BISON_CHECK([[input-c.y]], [[1]], [],
 950 [[input-c.y:1.7: %code qualifier 'q' is not used
 951 input-c.y:2.7-9: %code qualifier 'bad' is not used
 952 input-c.y:3.7-9: %code qualifier 'bad' is not used
 953 input-c.y:4.7-12: %code qualifier 'format' is not used
 954 ]])
 955
 956 AT_DATA([input-c-glr.y],
 957 [[%code q {}
 958 %code bad {}
 959  %code bad {}
 960 %%
 961 start: ;
 962 ]])
 963 AT_BISON_CHECK([[input-c-glr.y]], [[1]], [],
 964 [[input-c-glr.y:1.7: %code qualifier 'q' is not used
 965 input-c-glr.y:2.7-9: %code qualifier 'bad' is not used
 966 input-c-glr.y:3.8-10: %code qualifier 'bad' is not used
 967 ]])
 968
 969 AT_DATA([input-c++.y],
 970 [[%code q {}
 971 %code bad {}
 972  %code q {}
 973 %%
 974 start: ;
 975 ]])
 976 AT_BISON_CHECK([[input-c++.y]], [[1]], [],
 977 [[input-c++.y:1.7: %code qualifier 'q' is not used
 978 input-c++.y:2.7-9: %code qualifier 'bad' is not used
 979 input-c++.y:3.8: %code qualifier 'q' is not used
 980 ]])
 981
 982 AT_DATA([input-c++-glr.y],
 983 [[%code bad {}
 984 %code q {}
 985 %code q {}
 986 %%
 987 start: ;
 988 ]])
 989 AT_BISON_CHECK([[input-c++-glr.y]], [[1]], [],
 990 [[input-c++-glr.y:1.7-9: %code qualifier 'bad' is not used
 991 input-c++-glr.y:2.7: %code qualifier 'q' is not used
 992 input-c++-glr.y:3.7: %code qualifier 'q' is not used
 993 ]])
 994
 995 AT_DATA([special-char-@@.y],
 996 [[%code bad {}
 997 %code q {}
 998 %code q {}
 999 %%
1000 start: ;
1001 ]])
1002 AT_BISON_CHECK([[special-char-@@.y]], [[1]], [],
1003 [[special-char-@@.y:1.7-9: %code qualifier 'bad' is not used
1004 special-char-@@.y:2.7: %code qualifier 'q' is not used
1005 special-char-@@.y:3.7: %code qualifier 'q' is not used
1006 ]])
1007
1008 AT_DATA([special-char-@:>@.y],
1009 [[%code bad {}
1010 %code q {}
1011 %code q {}
1012 %%
1013 start: ;
1014 ]])
1015 AT_BISON_CHECK([[special-char-@:>@.y]], [[1]], [],
1016 [[special-char-@:>@.y:1.7-9: %code qualifier 'bad' is not used
1017 special-char-@:>@.y:2.7: %code qualifier 'q' is not used
1018 special-char-@:>@.y:3.7: %code qualifier 'q' is not used
1019 ]])
1020
1021 AT_CLEANUP
1022
1023
1024 ## ---------------- ##
1025 ## %define errors.  ##
1026 ## ---------------- ##
1027
1028 AT_SETUP([%define errors])
1029
1030 AT_DATA([input-redefined.y],
1031 [[%define var "value1"
1032 %define var "value1"
1033  %define var "value2"
1034 %define special1 "@:>@"
1035 %define special2 "@<:@"
1036 %%
1037 start: ;
1038 ]])
1039
1040 AT_BISON_CHECK([[input-redefined.y]], [[1]], [],
1041 [[input-redefined.y:2.9-11: %define variable 'var' redefined
1042 input-redefined.y:1.9-11: previous definition
1043 input-redefined.y:3.10-12: %define variable 'var' redefined
1044 input-redefined.y:2.9-11: previous definition
1045 ]])
1046
1047 AT_DATA([input-unused.y],
1048 [[%define var "value"
1049 %%
1050 start: ;
1051 ]])
1052
1053 AT_BISON_CHECK([[input-unused.y]], [[1]], [],
1054 [[input-unused.y:1.9-11: %define variable 'var' is not used
1055 ]])
1056
1057 AT_CLEANUP
1058
1059
1060 ## ----------------------------------- ##
1061 ## %define, --define, --force-define.  ##
1062 ## ----------------------------------- ##
1063
1064 AT_SETUP([[%define, --define, --force-define]])
1065
1066 AT_DATA([[skel.c]],
1067 [[m4@&t@_divert_push(0)@
1068 @output(b4_parser_file_name@)@
1069 [var-dd: ]b4_percent_define_get([[var-dd]])[
1070 var-ff: ]b4_percent_define_get([[var-ff]])[
1071 var-dfg: ]b4_percent_define_get([[var-dfg]])[
1072 var-fd: ]b4_percent_define_get([[var-fd]])
1073 m4@&t@_divert_pop(0)
1074 ]])
1075 AT_DATA([[input.y]],
1076 [[%define var-dfg "gram"
1077 %%
1078 start: ;
1079 ]])
1080 AT_BISON_CHECK([[-Dvar-dd=cmd-d1 -Dvar-dd=cmd-d2 \
1081                  -Fvar-ff=cmd-f1 -Fvar-ff=cmd-f2 \
1082                  -Dvar-dfg=cmd-d -Fvar-dfg=cmd-f \
1083                  -Fvar-fd=cmd-f -Dvar-fd=cmd-d   \
1084                  --skeleton ./skel.c input.y]])
1085 AT_CHECK([[cat input.tab.c]], [[0]],
1086 [[var-dd: cmd-d2
1087 var-ff: cmd-f2
1088 var-dfg: cmd-f
1089 var-fd: cmd-d
1090 ]])
1091
1092 AT_DATA([[input-dg.y]],
1093 [[%define var "gram"
1094 %%
1095 start: ;
1096 ]])
1097 AT_BISON_CHECK([[-Dvar=cmd-d input-dg.y]], [[1]], [],
1098 [[input-dg.y:1.9-11: %define variable 'var' redefined
1099 <command line>:2: previous definition
1100 ]])
1101
1102 AT_DATA([[input-unused.y]],
1103 [[%%
1104 start: ;
1105 ]])
1106 AT_BISON_CHECK([[-Dunused-d -Funused-f input-unused.y]], [[1]], [],
1107 [[<command line>:2: %define variable 'unused-d' is not used
1108 <command line>:3: %define variable 'unused-f' is not used
1109 ]])
1110
1111 AT_CLEANUP
1112
1113 ## --------------------------- ##
1114 ## %define Boolean variables.  ##
1115 ## --------------------------- ##
1116
1117 AT_SETUP([[%define Boolean variables]])
1118
1119 AT_DATA([Input.y],
1120 [[%language "Java"
1121 %define public "maybe"
1122 %define parser_class_name "Input"
1123 %%
1124 start: ;
1125 ]])
1126
1127 AT_BISON_CHECK([[Input.y]], [1], [],
1128 [[Input.y:2.9-14: invalid value for %define Boolean variable 'public'
1129 ]])
1130
1131 AT_CLEANUP
1132
1133 ## ------------------------ ##
1134 ## %define enum variables.  ##
1135 ## ------------------------ ##
1136
1137 AT_SETUP([[%define enum variables]])
1138
1139 # Front-end.
1140 AT_DATA([[input.y]],
1141 [[%define lr.default-reductions bogus
1142 %%
1143 start: ;
1144 ]])
1145 AT_BISON_CHECK([[input.y]], [[1]], [[]],
1146 [[input.y:1.9-29: invalid value for %define variable 'lr.default-reductions': 'bogus'
1147 input.y:1.9-29: accepted value: 'most'
1148 input.y:1.9-29: accepted value: 'consistent'
1149 input.y:1.9-29: accepted value: 'accepting'
1150 ]])
1151
1152 # Back-end.
1153 AT_DATA([[input.y]],
1154 [[%define api.push-pull neither
1155 %%
1156 start: ;
1157 ]])
1158 AT_BISON_CHECK([[input.y]], [1], [],
1159 [[input.y:1.9-21: invalid value for %define variable 'api.push-pull': 'neither'
1160 input.y:1.9-21: accepted value: 'pull'
1161 input.y:1.9-21: accepted value: 'push'
1162 input.y:1.9-21: accepted value: 'both'
1163 ]])
1164
1165 AT_CLEANUP
1166
1167 ## -------------------------------- ##
1168 ## %define backward compatibility.  ##
1169 ## -------------------------------- ##
1170
1171 AT_SETUP([[%define backward compatibility]])
1172
1173 # The error messages tell us whether underscores in these variables are
1174 # being converted to dashes.
1175
1176 AT_DATA([[input.y]],
1177 [[%define api.push_pull "neither"
1178 %%
1179 start: ;
1180 ]])
1181 AT_BISON_CHECK([[input.y]], [1], [],
1182 [[input.y:1.9-21: invalid value for %define variable 'api.push-pull': 'neither'
1183 input.y:1.9-21: accepted value: 'pull'
1184 input.y:1.9-21: accepted value: 'push'
1185 input.y:1.9-21: accepted value: 'both'
1186 ]])
1187
1188 AT_DATA([[input.y]],
1189 [[%define lr.keep_unreachable_states maybe
1190 %%
1191 start: ;
1192 ]])
1193 AT_BISON_CHECK([[input.y]], [1], [],
1194 [[input.y:1.9-34: invalid value for %define Boolean variable 'lr.keep-unreachable-states'
1195 ]])
1196
1197 AT_DATA([[input.y]],
1198 [[%define namespace "foo"
1199 %define api.namespace "foo"
1200 %%
1201 start: ;
1202 ]])
1203 AT_BISON_CHECK([[input.y]], [1], [],
1204 [[input.y:2.9-21: %define variable 'api.namespace' redefined
1205 input.y:1.9-17: previous definition
1206 ]])
1207
1208 AT_DATA([[input.y]],
1209 [[%define foo_bar "baz"
1210 %%
1211 start: ;
1212 ]])
1213 AT_BISON_CHECK([[input.y]], [[1]], [],
1214 [[input.y:1.9-15: %define variable 'foo_bar' is not used
1215 ]])
1216
1217 AT_CLEANUP
1218
1219 ## ------------------------- ##
1220 ## Unused %define api.pure.  ##
1221 ## ------------------------- ##
1222
1223 AT_SETUP([[Unused %define api.pure]])
1224
1225 # AT_CHECK_API_PURE(DECLS, VALUE)
1226 # -------------------------------
1227 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
1228 # are specified.
1229 m4_define([AT_CHECK_API_PURE],
1230 [
1231 AT_DATA([[input.y]],
1232 [[%define api.pure ]$2[
1233 ]$1[
1234 %%
1235 start: ;
1236 ]])
1237
1238 AT_BISON_CHECK([[input.y]], [[1]], [],
1239 [[input.y:1.9-16: %define variable 'api.pure' is not used
1240 ]])
1241 ])
1242
1243 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
1244 AT_CHECK_API_PURE([[%language "c++" %defines]], [[false]])
1245 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
1246 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[false]])
1247 AT_CHECK_API_PURE([[%language "java"]], [[true]])
1248 AT_CHECK_API_PURE([[%language "java"]], [[false]])
1249
1250 AT_CLEANUP
1251
1252 ## -------------------------------- ##
1253 ## C++ namespace reference errors.  ##
1254 ## -------------------------------- ##
1255
1256 AT_SETUP([[C++ namespace reference errors]])
1257
1258 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
1259 # -------------------------------------------------------------
1260 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
1261 m4_define([AT_CHECK_NAMESPACE_ERROR],
1262 [
1263 AT_DATA([[input.y]],
1264 [[%language "C++"
1265 %defines
1266 %define api.namespace "]$1["
1267 %%
1268 start: ;
1269 ]])
1270
1271 AT_BISON_CHECK([[input.y]], [1], [],
1272 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
1273 [[input.y:3.9-21: ]b4_arg[
1274 ]])])
1275 ])
1276
1277 AT_CHECK_NAMESPACE_ERROR([[]],
1278                          [[namespace reference is empty]])
1279 AT_CHECK_NAMESPACE_ERROR([[                             ]],
1280                          [[namespace reference is empty]])
1281 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
1282                          [[namespace reference has consecutive "::"]])
1283 AT_CHECK_NAMESPACE_ERROR([[foo::        ::bar]],
1284                          [[namespace reference has consecutive "::"]])
1285 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
1286                          [[namespace reference has consecutive "::"]])
1287 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
1288                          [[namespace reference has consecutive "::"]])
1289 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ::]],
1290                          [[namespace reference has consecutive "::"]],
1291                          [[namespace reference has a trailing "::"]])
1292 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
1293                          [[namespace reference has a trailing "::"]])
1294 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ]],
1295                          [[namespace reference has a trailing "::"]])
1296 AT_CHECK_NAMESPACE_ERROR([[::]],
1297                          [[namespace reference has a trailing "::"]])
1298
1299 AT_CLEANUP
1300
1301 ## ------------------------ ##
1302 ## Bad character literals.  ##
1303 ## ------------------------ ##
1304
1305 # Bison used to accept character literals that were empty or contained
1306 # too many characters.
1307
1308 # FIXME: AT_DATA or some variant of AT_DATA may eventually permit
1309 # the final newline to be omitted.  See the threads starting at
1310 # <http://lists.gnu.org/archive/html/bison-patches/2009-07/msg00019.html>.
1311
1312 AT_SETUP([[Bad character literals]])
1313
1314 AT_DATA([empty.y],
1315 [[%%
1316 start: '';
1317 start: '
1318 ]])
1319 AT_CHECK([[perl -e "print 'start: \'';" >> empty.y || exit 77]])
1320
1321 AT_BISON_CHECK([empty.y], [1], [],
1322 [[empty.y:2.8-9: warning: empty character literal [-Wother]
1323 empty.y:3.8-4.0: warning: empty character literal [-Wother]
1324 empty.y:3.8-4.0: missing "'" at end of line
1325 empty.y:4.8: warning: empty character literal [-Wother]
1326 empty.y:4.8: missing "'" at end of file
1327 ]])
1328
1329 AT_DATA([two.y],
1330 [[%%
1331 start: 'ab';
1332 start: 'ab
1333 ]])
1334 AT_CHECK([[perl -e "print 'start: \'ab';" >> two.y || exit 77]])
1335
1336 AT_BISON_CHECK([two.y], [1], [],
1337 [[two.y:2.8-11: warning: extra characters in character literal [-Wother]
1338 two.y:3.8-4.0: warning: extra characters in character literal [-Wother]
1339 two.y:3.8-4.0: missing "'" at end of line
1340 two.y:4.8-10: warning: extra characters in character literal [-Wother]
1341 two.y:4.8-10: missing "'" at end of file
1342 ]])
1343
1344 AT_DATA([three.y],
1345 [[%%
1346 start: 'abc';
1347 start: 'abc
1348 ]])
1349 AT_CHECK([[perl -e "print 'start: \'abc';" >> three.y || exit 77]])
1350
1351 AT_BISON_CHECK([three.y], [1], [],
1352 [[three.y:2.8-12: warning: extra characters in character literal [-Wother]
1353 three.y:3.8-4.0: warning: extra characters in character literal [-Wother]
1354 three.y:3.8-4.0: missing "'" at end of line
1355 three.y:4.8-11: warning: extra characters in character literal [-Wother]
1356 three.y:4.8-11: missing "'" at end of file
1357 ]])
1358
1359 AT_CLEANUP
1360
1361 ## ------------------------- ##
1362 ## Bad escapes in literals.  ##
1363 ## ------------------------- ##
1364
1365 AT_SETUP([[Bad escapes in literals]])
1366
1367 AT_DATA([input.y],
1368 [[%%
1369 start: '\777' '\0' '\xfff' '\x0'
1370        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
1371        '\ ' '\A';
1372 ]])
1373
1374 # It is not easy to create special characters, we cannot even trust tr.
1375 # Beside we cannot even expect "echo '\0'" to output two characters
1376 # (well three with \n): at least Bash 3.2 converts the two-character
1377 # sequence "\0" into a single NUL character.
1378 AT_CHECK([[perl -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
1379            || exit 77]])
1380
1381 AT_BISON_CHECK([input.y], [1], [],
1382 [[input.y:2.9-12: invalid number after \-escape: 777
1383 input.y:2.8-13: warning: empty character literal [-Wother]
1384 input.y:2.16-17: invalid number after \-escape: 0
1385 input.y:2.15-18: warning: empty character literal [-Wother]
1386 input.y:2.21-25: invalid number after \-escape: xfff
1387 input.y:2.20-26: warning: empty character literal [-Wother]
1388 input.y:2.29-31: invalid number after \-escape: x0
1389 input.y:2.28-32: warning: empty character literal [-Wother]
1390 input.y:3.9-14: invalid number after \-escape: uffff
1391 input.y:3.8-15: warning: empty character literal [-Wother]
1392 input.y:3.18-23: invalid number after \-escape: u0000
1393 input.y:3.17-24: warning: empty character literal [-Wother]
1394 input.y:3.27-36: invalid number after \-escape: Uffffffff
1395 input.y:3.26-37: warning: empty character literal [-Wother]
1396 input.y:3.40-49: invalid number after \-escape: U00000000
1397 input.y:3.39-50: warning: empty character literal [-Wother]
1398 input.y:4.9-10: invalid character after \-escape: ' '
1399 input.y:4.8-11: warning: empty character literal [-Wother]
1400 input.y:4.14-15: invalid character after \-escape: A
1401 input.y:4.13-16: warning: empty character literal [-Wother]
1402 input.y:5.9-16: invalid character after \-escape: \t
1403 input.y:5.17: invalid character after \-escape: \f
1404 input.y:5.18: invalid character after \-escape: \0
1405 input.y:5.19: invalid character after \-escape: \001
1406 ]])
1407
1408 AT_CLEANUP
1409
1410 ## ------------------------- ##
1411 ## LAC: Errors for %define.  ##
1412 ## ------------------------- ##
1413
1414 AT_SETUP([[LAC: Errors for %define]])
1415
1416 AT_DATA([[input.y]],
1417 [[%%
1418 start: ;
1419 ]])
1420
1421 # parse.lac.* options are useless if LAC isn't actually activated.
1422 AT_BISON_CHECK([[-Dparse.lac.es-capacity-initial=1 input.y]],
1423                [[1]], [],
1424 [[<command line>:2: %define variable 'parse.lac.es-capacity-initial' is not used
1425 ]])
1426 AT_BISON_CHECK([[-Dparse.lac.memory-trace=full input.y]],
1427                [[1]], [],
1428 [[<command line>:2: %define variable 'parse.lac.memory-trace' is not used
1429 ]])
1430
1431 AT_CLEANUP
1432
1433 ## --------------------------------------------- ##
1434 ## -Werror is not affected by -Wnone and -Wall.  ##
1435 ## --------------------------------------------- ##
1436
1437 AT_SETUP([[-Werror is not affected by -Wnone and -Wall]])
1438
1439 AT_DATA([[input.y]],
1440 [[%%
1441 foo-bar: ;
1442 ]])
1443
1444 # -Werror is not enabled by -Wall or equivalent.
1445 AT_BISON_CHECK([[-Wall input.y]], [[0]], [[]],
1446 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
1447 ]])
1448 AT_BISON_CHECK([[-W input.y]], [[0]], [[]],
1449 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
1450 ]])
1451 AT_BISON_CHECK([[-Wno-none input.y]], [[0]], [[]],
1452 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
1453 ]])
1454
1455 # -Werror is not disabled by -Wnone or equivalent.
1456 AT_BISON_CHECK([[-Werror,none,yacc input.y]], [[1]], [[]], [[stderr]])
1457 AT_CHECK([[sed 's/^.*bison:/bison:/' stderr]], [[0]],
1458 [[bison: warnings being treated as errors
1459 input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
1460 ]])
1461 [mv stderr experr]
1462 AT_BISON_CHECK([[-Werror,no-all,yacc input.y]], [[1]], [[]], [[experr]])
1463
1464 AT_CLEANUP
1465
1466
1467 ## ------------------------------------------------------ ##
1468 ## %name-prefix and %define api.prefix are incompatible.  ##
1469 ## ------------------------------------------------------ ##
1470
1471 AT_SETUP([[%name-prefix and %define api.prefix are incompatible]])
1472
1473 # AT_TEST(DIRECTIVES, OPTIONS, ERROR-LOCATION)
1474 # --------------------------------------------
1475 m4_pushdef([AT_TEST],
1476 [AT_DATA([[input.y]],
1477 [[$1
1478 %%
1479 exp:;
1480 ]])
1481 AT_BISON_CHECK([[$2 input.y]], [[1]], [[]],
1482 [[$3: '%name-prefix' and '%define api.prefix' cannot be used together
1483 ]])
1484 ])
1485
1486 AT_TEST([%define api.prefix foo %name-prefix "bar"], [], [input.y:1.9-18])
1487 AT_TEST([], [-Dapi.prefix=foo -p bar], [<command line>:2])
1488 AT_TEST([%name-prefix "bar"], [-Dapi.prefix=foo], [<command line>:2])
1489 AT_TEST([%define api.prefix foo], [-p bar], [input.y:1.9-18])
1490
1491 m4_popdef([AT_TEST])
1492
1493 AT_CLEANUP
1494
1495
1496 ## -------------- ##
1497 ## Stray $ or @.  ##
1498 ## -------------- ##
1499
1500 AT_SETUP([[Stray $ or @]])
1501
1502 # Give %printer and %destructor "<*> exp TOK" instead of "<*>" to
1503 # check that the warnings are reported once, not three times.
1504
1505 AT_DATA_GRAMMAR([[input.y]],
1506 [[%type <TYPE> exp
1507 %token <TYPE> TOK TOK2
1508 %destructor     { $%; @%; } <*> exp TOK;
1509 %initial-action { $%; @%; };
1510 %printer        { $%; @%; } <*> exp TOK;
1511 %%
1512 exp: TOK        { $%; @%; $$ = $1; };
1513 ]])
1514
1515 AT_BISON_CHECK([[input.y]], 0, [],
1516 [[input.y:11.19: warning: stray '$' [-Wother]
1517 input.y:11.23: warning: stray '@' [-Wother]
1518 input.y:12.19: warning: stray '$' [-Wother]
1519 input.y:12.23: warning: stray '@' [-Wother]
1520 input.y:13.19: warning: stray '$' [-Wother]
1521 input.y:13.23: warning: stray '@' [-Wother]
1522 input.y:15.19: warning: stray '$' [-Wother]
1523 input.y:15.23: warning: stray '@' [-Wother]
1524 ]])
1525
1526 AT_CLEANUP
1527
1528
1529
1530 ## ---------------- ##
1531 ## Code injection.  ##
1532 ## ---------------- ##
1533
1534
1535 AT_SETUP([[Code injection]])
1536
1537 m4_pattern_allow([^m4_errprintn$])
1538
1539 # AT_TEST([MACRO])
1540 # ----------------
1541 # Try to have MACRO be run by bison.
1542 m4_pushdef([AT_TEST],
1543 [AT_DATA([[input.y]],
1544 [[%type <$1(DEAD %type)> exp
1545 %token <$1(DEAD %token)> a
1546 %token b
1547 %initial-action
1548 {
1549   $$;
1550   $<$1(DEAD %initial-action)>$
1551 };
1552 %printer
1553 {
1554   $$
1555   $<$1(DEAD %printer)>$
1556 } <> <*>;
1557 %lex-param
1558 {
1559   $1(DEAD %lex-param)
1560 };
1561 %parse-param
1562 {
1563   $1(DEAD %parse-param)
1564 };
1565 %%
1566 exp:
1567   a a[name] b
1568   {
1569     $$;
1570     $][1;
1571     $<$1(DEAD action 1)>$
1572     $<$1(DEAD action 2)>1
1573     $<$1(DEAD action 3)>name
1574     $<$1(DEAD action 4)>0
1575     ;
1576   };
1577 ]])
1578
1579 # FIXME: Provide a means to iterate over all the skeletons.
1580 AT_BISON_CHECK([[-d               input.y]])
1581 AT_BISON_CHECK([[-d -S glr.c      input.y]])
1582 AT_BISON_CHECK([[-d -S lalr1.cc   input.y]])
1583 AT_BISON_CHECK([[-d -S glr.cc     input.y]])
1584 AT_BISON_CHECK([[   -S lalr1.java input.y]])
1585 ])
1586
1587 AT_TEST([m4_errprintn])
1588 AT_TEST([@:>@m4_errprintn])
1589
1590 m4_popdef([AT_TEST])
1591
1592 AT_CLEANUP