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: { $$ = $1 ; };
  32 exp: { @$ = @1 ; };
  33 ]])
  34
  35 AT_BISON_CHECK([input.y], [1], [],
  36 [[input.y:2.13-14: error: integer out of range: '$1'
  37 input.y:3.13-14: error: integer out of range: '@1'
  38 ]])
  39
  40 AT_CLEANUP
  41
  42
  43 ## -------------- ##
  44 ## Type Clashes.  ##
  45 ## -------------- ##
  46
  47 AT_SETUP([Type Clashes])
  48
  49 AT_DATA([input.y],
  50 [[%union { int bar; }
  51 %token foo
  52 %type <bar> exp
  53 %%
  54 exp: foo { $$; } foo { $2; } foo
  55    | foo
  56    | /* Empty. */
  57    ;
  58 ]])
  59
  60 AT_BISON_CHECK([input.y], [1], [],
  61 [[input.y:5.12-13: error: $$ for the midrule at $2 of 'exp' has no declared type
  62 input.y:5.24-25: error: $2 of 'exp' has no declared type
  63 input.y:5.6-32: warning: type clash on default action: <bar> != <> [-Wother]
  64 input.y:6.6-8: warning: type clash on default action: <bar> != <> [-Wother]
  65 input.y:7.5: warning: empty rule for typed nonterminal, and no action [-Wother]
  66 ]])
  67
  68 AT_CLEANUP
  69
  70
  71 # _AT_UNUSED_VALUES_DECLARATIONS()
  72 # --------------------------------
  73 # Generate the token, type, and destructor
  74 # declarations for the unused values tests.
  75 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
  76 [[[%token <integer> INT;
  77 %type <integer> a b c d e f g h i j k l;
  78 %destructor { destroy ($$); } 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 ($$); } <>;
 200 ]])
 201
 202 AT_BISON_CHECK([input.y], [1], [],
 203 [[input.y:1.13-29: error: %destructor redeclaration for <*>
 204 input.y:1.13-29:     previous declaration
 205 input.y:2.10-24: error: %printer redeclaration for <*>
 206 input.y:2.10-24:     previous declaration
 207 input.y:4.13-29: error: %destructor redeclaration for <*>
 208 input.y:1.13-29:     previous declaration
 209 input.y:5.10-24: error: %printer redeclaration for <*>
 210 input.y:2.10-24:     previous declaration
 211 input.y:7.13-29: error: %destructor redeclaration for <>
 212 input.y:7.13-29:     previous declaration
 213 input.y:8.10-24: error: %printer redeclaration for <>
 214 input.y:8.10-24:     previous declaration
 215 input.y:10.13-29: error: %destructor redeclaration for <>
 216 input.y:7.13-29:      previous declaration
 217 input.y:11.10-24: error: %printer redeclaration for <>
 218 input.y:8.10-24:      previous declaration
 219 input.y:17.13-29: error: %destructor redeclaration for <*>
 220 input.y:4.13-29:      previous declaration
 221 input.y:18.10-24: error: %printer redeclaration for <*>
 222 input.y:5.10-24:      previous declaration
 223 input.y:20.13-29: error: %destructor redeclaration for <>
 224 input.y:10.13-29:     previous declaration
 225 input.y:21.10-24: error: %printer redeclaration for <>
 226 input.y:11.10-24:     previous declaration
 227 ]])
 228
 229 AT_CLEANUP
 230
 231
 232 ## ---------------------------------------------- ##
 233 ## Per-type %printer and %destructor redeclared.  ##
 234 ## ---------------------------------------------- ##
 235
 236 AT_SETUP([Per-type %printer and %destructor redeclared])
 237
 238 AT_DATA([[input.y]],
 239 [[%destructor { destroy ($$); } <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: error: %destructor redeclaration for <field1>
 255 input.y:1.13-29:     previous declaration
 256 input.y:4.13-29: error: %destructor redeclaration for <field1>
 257 input.y:4.13-29:     previous declaration
 258 input.y:5.10-24: error: %printer redeclaration for <field2>
 259 input.y:2.10-24:     previous declaration
 260 input.y:5.10-24: error: %printer redeclaration for <field2>
 261 input.y:5.10-24:     previous declaration
 262 input.y:11.13-29: error: %destructor redeclaration for <field1>
 263 input.y:4.13-29:      previous declaration
 264 input.y:11.13-29: error: %destructor redeclaration for <field2>
 265 input.y:1.13-29:      previous declaration
 266 input.y:12.10-24: error: %printer redeclaration for <field1>
 267 input.y:2.10-24:      previous declaration
 268 input.y:12.10-24: error: %printer redeclaration for <field2>
 269 input.y:5.10-24:      previous declaration
 270 ]])
 271
 272 AT_CLEANUP
 273
 274 ## ------------------- ##
 275 ## Undefined symbols.  ##
 276 ## ------------------- ##
 277
 278 AT_SETUP([Undefined symbols])
 279
 280 AT_DATA([[input.y]],
 281 [[%printer {} foo baz
 282 %destructor {} bar
 283 %type <foo> qux
 284 %%
 285 exp: bar;
 286 ]])
 287
 288 AT_BISON_CHECK([input.y], [1], [],
 289 [[input.y:2.16-18: error: 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 input.y:3.13-15: warning: symbol qux is used, but is not defined as a token and has no rules [-Wother]
 293 ]])
 294
 295 AT_CLEANUP
 296
 297
 298 ## ----------------------------------------------------- ##
 299 ## Unassociated types used for a printer or destructor.  ##
 300 ## ----------------------------------------------------- ##
 301
 302 AT_SETUP([Unassociated types used for a printer or destructor])
 303
 304 AT_DATA([[input.y]],
 305 [[%token <type1> tag1
 306 %type <type2> tag2
 307
 308 %printer { } <type1> <type3>
 309 %destructor { } <type2> <type4>
 310
 311 %%
 312
 313 exp: tag1 { $1; }
 314    | tag2 { $1; }
 315
 316 tag2: "a" { $$; }
 317 ]])
 318
 319 AT_BISON_CHECK([input.y], [0], [],
 320 [[input.y:4.22-28: warning: type <type3> is used, but is not associated to any symbol [-Wother]
 321 input.y:5.25-31: warning: type <type4> is used, but is not associated to any symbol [-Wother]
 322 ]])
 323
 324 AT_CLEANUP
 325
 326
 327 ## --------------------------------- ##
 328 ## Useless printers or destructors.  ##
 329 ## --------------------------------- ##
 330
 331 AT_SETUP([Useless printers or destructors])
 332
 333 # AT_TEST([INPUT], [STDERR])
 334 # --------------------------
 335 m4_pushdef([AT_TEST],
 336 [AT_DATA([[input.y]],
 337 [$1
 338 ])
 339 AT_BISON_CHECK([input.y], [0], [], [$2
 340 ])])
 341
 342 AT_TEST([[%token <type1> token1
 343 %token <type2> token2
 344 %token <type3> token3
 345 %token <type4> token4
 346 %token <type5> token51 token52
 347 %token <type6> token61 token62
 348 %token <type7> token7
 349
 350 %printer {} token1
 351 %destructor {} token2
 352 %printer {} token51
 353 %destructor {} token61
 354
 355 %printer {} token7
 356
 357 %printer {} <type1>
 358 %destructor {} <type2>
 359 %printer {} <type3>
 360 %destructor {} <type4>
 361
 362 %printer {} <type5>
 363 %destructor {} <type6>
 364
 365 %destructor {} <type7>
 366
 367 %%
 368 exp: "a";]],
 369 [[input.y:16.13-19: warning: useless %printer for type <type1> [-Wother]
 370 input.y:17.16-22: warning: useless %destructor for type <type2> [-Wother]]])
 371
 372 # If everybody is typed, <> is useless.
 373 AT_TEST([[%type <type> exp
 374 %token <type> a
 375 %printer {} <> <*>
 376 %%
 377 exp: a;]],
 378 [[input.y:3.13-14: warning: useless %printer for type <> [-Wother]]])
 379
 380 # If nobody is typed, <*> is useless.
 381 AT_TEST([[%token a
 382 %printer {} <> <*>
 383 %%
 384 exp: a;]],
 385 [[input.y:2.16-18: warning: useless %printer for type <*> [-Wother]]])
 386
 387 m4_popdef([AT_TEST])
 388
 389 AT_CLEANUP
 390
 391
 392 ## ---------------------------------------- ##
 393 ## Unused values with default %destructor.  ##
 394 ## ---------------------------------------- ##
 395
 396 AT_SETUP([Unused values with default %destructor])
 397
 398 AT_DATA([[input.y]],
 399 [[%destructor { destroy ($$); } <>
 400 %type <tag> tagged
 401
 402 %%
 403
 404 start: end end tagged tagged { $<tag>1; $3; } ;
 405 end: { } ;
 406 tagged: { } ;
 407 ]])
 408
 409 AT_BISON_CHECK([input.y], [0], [],
 410 [[input.y:6.8-45: warning: unset value: $$ [-Wother]
 411 input.y:6.8-45: warning: unused value: $2 [-Wother]
 412 input.y:7.6-8: warning: unset value: $$ [-Wother]
 413 ]])
 414
 415 AT_DATA([[input.y]],
 416 [[%destructor { destroy ($$); } <*>
 417 %type <tag> tagged
 418
 419 %%
 420
 421 start: end end tagged tagged { $<tag>1; $3; } ;
 422 end: { } ;
 423 tagged: { } ;
 424 ]])
 425
 426 AT_BISON_CHECK([input.y], [0], [],
 427 [[input.y:6.8-45: warning: unused value: $4 [-Wother]
 428 input.y:8.9-11: warning: unset value: $$ [-Wother]
 429 ]])
 430
 431 AT_CLEANUP
 432
 433
 434 ## ----------------------------------------- ##
 435 ## Unused values with per-type %destructor.  ##
 436 ## ----------------------------------------- ##
 437
 438 AT_SETUP([Unused values with per-type %destructor])
 439
 440 AT_DATA([[input.y]],
 441 [[%destructor { destroy ($$); } <field1>
 442 %type <field1> start end
 443
 444 %%
 445
 446 start: end end { $1; } ;
 447 end: { }  ;
 448 ]])
 449
 450 AT_BISON_CHECK([input.y], [0], [],
 451 [[input.y:6.8-22: warning: unset value: $$ [-Wother]
 452 input.y:6.8-22: warning: unused value: $2 [-Wother]
 453 input.y:7.6-8: warning: unset value: $$ [-Wother]
 454 ]])
 455
 456 AT_CLEANUP
 457
 458
 459 ## ---------------------- ##
 460 ## Incompatible Aliases.  ##
 461 ## ---------------------- ##
 462
 463 AT_SETUP([Incompatible Aliases])
 464
 465 AT_DATA([input.y],
 466 [[%token foo "foo"
 467
 468 %type <bar>       foo
 469 %printer {bar}    foo
 470 %destructor {bar} foo
 471 %left             foo
 472
 473 %type <baz>       "foo"
 474 %printer {baz}    "foo"
 475 %destructor {baz} "foo"
 476 %left             "foo"
 477
 478 %%
 479 exp: foo;
 480 ]])
 481
 482 AT_BISON_CHECK([input.y], [1], [],
 483 [[input.y:8.7-11: error: %type redeclaration for foo
 484 input.y:3.7-11:     previous declaration
 485 input.y:10.13-17: error: %destructor redeclaration for foo
 486 input.y:5.13-17:      previous declaration
 487 input.y:9.10-14: error: %printer redeclaration for foo
 488 input.y:4.10-14:     previous declaration
 489 input.y:11.1-5: error: %left redeclaration for foo
 490 input.y:6.1-5:      previous declaration
 491 ]])
 492
 493 AT_CLEANUP
 494
 495
 496
 497 ## ----------------------- ##
 498 ## Torturing the Scanner.  ##
 499 ## ----------------------- ##
 500
 501 # Be sure to compile and run, so that the C compiler checks what
 502 # we do.
 503
 504 AT_SETUP([Torturing the Scanner])
 505
 506 AT_BISON_OPTION_PUSHDEFS
 507 AT_DATA([input.y], [])
 508 AT_BISON_CHECK([input.y], [1], [],
 509 [[input.y:1.1: error: syntax error, unexpected end of file
 510 ]])
 511
 512
 513 AT_DATA([input.y],
 514 [{}
 515 ])
 516 AT_BISON_CHECK([input.y], [1], [],
 517 [[input.y:1.1-2: error: syntax error, unexpected {...}
 518 ]])
 519
 520
 521 AT_DATA_GRAMMAR([input.y],
 522 [[%{
 523 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 524 const char *foo = "So %{ and %} can be here too.";
 525
 526 #if 0
 527 /* These examples test Bison while not stressing C compilers too much.
 528    Many C compilers mishandle backslash-newlines, so this part of the
 529    test is inside "#if 0".  The comment and string are written so that
 530    the "#endif" will be seen regardless of the C compiler bugs that we
 531    know about, namely:
 532
 533      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 534      comment.
 535
 536      The Apple Darwin compiler (as of late 2002) mishandles
 537      \\[newline]' within a character constant.
 538
 539    */
 540
 541 /\
 542 * A comment with backslash-newlines in it. %} *\
 543 \
 544 /
 545 /* { Close the above comment, if the C compiler mishandled it.  */
 546
 547 char str[] = "\\
 548 " A string with backslash-newlines in it %{ %} \\
 549 \
 550 "";
 551
 552 char apostrophe = '\'';
 553 #endif
 554
 555 #include <stdio.h>
 556 #include <stdlib.h>
 557 #include <assert.h>
 558 %}
 559 /* %{ and %} can be here too. */
 560
 561 %{
 562 /* Exercise pre-prologue dependency to %union.  */
 563 typedef int value;
 564 %}
 565
 566 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 567
 568 /* Also exercise %union. */
 569 %union
 570 {
 571   value ival; /* A comment to exercise an old bug. */
 572 };
 573
 574
 575 /* Exercise post-prologue dependency to %union.  */
 576 %{
 577 static YYSTYPE value_as_yystype (value val);
 578
 579 /* Exercise quotes in declarations.  */
 580 char quote[] = "@:>@@:>@,";
 581 %}
 582
 583 %{
 584 ]AT_YYERROR_DECLARE[
 585 ]AT_YYLEX_DECLARE[
 586 %}
 587
 588 %type <ival> '@<:@'
 589
 590 /* Exercise quotes in strings.  */
 591 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 592
 593 %%
 594 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 595 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 596   {
 597     /* Exercise quotes in braces.  */
 598     char tmp[] = "@<:@%c@:>@,\n";
 599     printf (tmp, $1);
 600   }
 601 ;
 602
 603 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 604 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 605 output.or.oline.opt: ;|oline;;|output;;;
 606 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 607 %%
 608 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 609
 610 static YYSTYPE
 611 value_as_yystype (value val)
 612 {
 613   YYSTYPE res;
 614   res.ival = val;
 615   return res;
 616 }
 617 ]AT_YYERROR_DEFINE[
 618 static int
 619 yylex (void)
 620 {
 621   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
 622 #output "; /* "
 623   */
 624   static size_t toknum;
 625   assert (toknum < sizeof input);
 626   yylval = value_as_yystype (input[toknum]);
 627   return input[toknum++];
 628 }
 629 ]])
 630
 631 # Pacify Emacs'font-lock-mode: "
 632
 633 AT_DATA([main.c],
 634 [[typedef int value;
 635 #include "input.h"
 636
 637 int yyparse (void);
 638
 639 int
 640 main (void)
 641 {
 642   return yyparse ();
 643 }
 644 ]])
 645 AT_BISON_OPTION_POPDEFS
 646
 647 AT_BISON_CHECK([-d -v -o input.c input.y])
 648 AT_COMPILE([input.o])
 649 AT_COMPILE([main.o])
 650 AT_COMPILE([input], [input.o main.o])
 651 AT_PARSER_CHECK([./input], 0,
 652 [[[@<:@],
 653 ]])
 654
 655 AT_CLEANUP
 656
 657
 658 ## ---------------------- ##
 659 ## Typed symbol aliases.  ##
 660 ## ---------------------- ##
 661
 662 AT_SETUP([Typed symbol aliases])
 663
 664 # Bison 2.0 broke typed symbol aliases - ensure they work.
 665
 666 AT_DATA_GRAMMAR([input.y],
 667 [[%union
 668 {
 669   int val;
 670 };
 671 %token <val> MY_TOKEN "MY TOKEN"
 672 %type <val> exp
 673 %%
 674 exp: "MY TOKEN";
 675 %%
 676 ]])
 677
 678 AT_BISON_CHECK([-o input.c input.y])
 679
 680 AT_CLEANUP
 681
 682
 683 ## --------- ##
 684 ## Require.  ##
 685 ## --------- ##
 686
 687 m4_define([AT_CHECK_REQUIRE],
 688 [AT_SETUP([Require $1])
 689 AT_DATA_GRAMMAR([input.y],
 690 [[%require "$1";
 691 %%
 692 empty_file:;
 693 ]])
 694 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
 695 AT_CLEANUP
 696 ])
 697
 698 AT_CHECK_REQUIRE(1.0, 0)
 699 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 700 ## FIXME: Some day augment this version number.
 701 AT_CHECK_REQUIRE(100.0, 63)
 702
 703
 704 ## ------------------------------------- ##
 705 ## String aliases for character tokens.  ##
 706 ## ------------------------------------- ##
 707
 708 AT_SETUP([String aliases for character tokens])
 709
 710 # Bison once thought a character token and its alias were different
 711 # symbols with the same user token number.
 712
 713 AT_DATA_GRAMMAR([input.y],
 714 [[%token 'a' "a"
 715 %%
 716 start: 'a';
 717 %%
 718 ]])
 719
 720 AT_BISON_CHECK([-o input.c input.y])
 721
 722 AT_CLEANUP
 723
 724
 725 ## -------------- ##
 726 ## Symbol names.  ##
 727 ## -------------- ##
 728
 729 AT_SETUP([Symbols])
 730
 731 AT_BISON_OPTION_PUSHDEFS
 732 AT_DATA_GRAMMAR([input.y],
 733 [[%token WITH-DASH
 734 %token WITHOUT_DASH "WITHOUT-DASH"
 735 %token WITH.PERIOD
 736 %token WITHOUT_PERIOD "WITHOUT.PERIOD"
 737 %code {
 738   ]AT_YYERROR_DECLARE[
 739   ]AT_YYLEX_DECLARE[
 740 }
 741 %%
 742 start: with-dash without_dash with.period without_period;
 743 with-dash: WITH-DASH;
 744 without_dash: "WITHOUT-DASH";
 745 with.period: WITH.PERIOD;
 746 without_period: "WITHOUT.PERIOD";
 747 %%
 748 ]AT_YYERROR_DEFINE[
 749 ]AT_YYLEX_DEFINE[
 750 ]])
 751 AT_BISON_OPTION_POPDEFS
 752
 753 # POSIX Yacc accept periods, but not dashes.
 754 AT_BISON_CHECK([--yacc -Wno-error input.y], [], [],
 755 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Wyacc]
 756 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash [-Wyacc]
 757 ]])
 758
 759 # So warn about them.
 760 AT_BISON_CHECK([-Wyacc input.y], [], [],
 761 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Wyacc]
 762 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash [-Wyacc]
 763 ]])
 764
 765 # Dashes are fine for GNU Bison.
 766 AT_BISON_CHECK([-o input.c input.y])
 767
 768 # Make sure we don't export silly token identifiers with periods or dashes.
 769 AT_COMPILE([input.o])
 770
 771
 772 # Periods are genuine letters, they can start identifiers.
 773 # Digits and dashes cannot.
 774 AT_DATA_GRAMMAR([input.y],
 775 [[%token .GOOD
 776          -GOOD
 777          1NV4L1D
 778          -123
 779 %%
 780 start: .GOOD GOOD
 781 ]])
 782 AT_BISON_CHECK([-o input.c input.y], [1], [],
 783 [[input.y:10.10: error: invalid character: '-'
 784 input.y:11.10-16: error: invalid identifier: '1NV4L1D'
 785 input.y:12.10: error: invalid character: '-'
 786 ]])
 787
 788 AT_CLEANUP
 789
 790
 791 ## ----------------- ##
 792 ## Numbered tokens.  ##
 793 ## ----------------- ##
 794
 795 AT_SETUP([Numbered tokens])
 796
 797 AT_DATA_GRAMMAR([redecl.y],
 798 [[%token DECIMAL_1     11259375
 799          HEXADECIMAL_1 0xabcdef
 800          HEXADECIMAL_2 0xFEDCBA
 801          DECIMAL_2     16702650
 802 %%
 803 start: DECIMAL_1 HEXADECIMAL_2;
 804 ]])
 805
 806 AT_BISON_CHECK([redecl.y], [1], [],
 807 [[redecl.y:10.10-22: error: user token number 11259375 redeclaration for HEXADECIMAL_1
 808 redecl.y:9.8-16:       previous declaration for DECIMAL_1
 809 redecl.y:12.10-18: error: user token number 16702650 redeclaration for DECIMAL_2
 810 redecl.y:11.10-22:     previous declaration for HEXADECIMAL_2
 811 ]])
 812
 813 AT_DATA_GRAMMAR([too-large.y],
 814 [[%token TOO_LARGE_DEC 999999999999999999999
 815          TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
 816 %%
 817 start: TOO_LARGE_DEC TOO_LARGE_HEX
 818 %%
 819 ]])
 820
 821 AT_BISON_CHECK([too-large.y], [1], [],
 822 [[too-large.y:9.22-42: error: integer out of range: '999999999999999999999'
 823 too-large.y:10.24-44: error: integer out of range: '0xFFFFFFFFFFFFFFFFFFF'
 824 ]])
 825
 826 AT_CLEANUP
 827
 828
 829 ## --------------------- ##
 830 ## Unclosed constructs.  ##
 831 ## --------------------- ##
 832
 833 AT_SETUP([Unclosed constructs])
 834
 835 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed
 836 # constructs, so they were prepended to whatever it STRING_GROW'ed
 837 # next.  It also threw them away rather than returning them to the
 838 # parser.  The effect was confusing subsequent error messages.
 839
 840 AT_DATA([input.y],
 841 [[%token A "a
 842 %token B "b"
 843 %token AB "ab" // Used to complain that "ab" was already used.
 844 %token C '1
 845 %token TWO "2"
 846 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
 847
 848 %%
 849
 850 start: ;
 851
 852 // Used to report a syntax error because it didn't see any kind of symbol
 853 // identifier.
 854 %type <f> 'a
 855 ;
 856 %type <f> "a
 857 ;
 858 // Used to report a syntax error because it didn't see braced code.
 859 %destructor { free ($$)
 860 ]])
 861
 862 AT_BISON_CHECK([-o input.c input.y], 1, [],
 863 [[input.y:1.10-2.0: error: missing '"' at end of line
 864 input.y:4.10-5.0: error: missing "'" at end of line
 865 input.y:14.11-15.0: error: missing "'" at end of line
 866 input.y:16.11-17.0: error: missing '"' at end of line
 867 input.y:19.13-20.0: error: missing '}' at end of file
 868 input.y:20.1: error: syntax error, unexpected end of file
 869 ]])
 870
 871 AT_CLEANUP
 872
 873
 874 ## ------------------------- ##
 875 ## %start after first rule.  ##
 876 ## ------------------------- ##
 877
 878 AT_SETUP([%start after first rule])
 879
 880 # Bison once complained that a %start after the first rule was a
 881 # redeclaration of the start symbol.
 882
 883 AT_DATA([input.y],
 884 [[%%
 885 false_start: ;
 886 start: false_start ;
 887 %start start;
 888 ]])
 889
 890 AT_BISON_CHECK([-o input.c input.y])
 891
 892 AT_CLEANUP
 893
 894
 895 ## --------------------- ##
 896 ## %prec takes a token.  ##
 897 ## --------------------- ##
 898
 899 AT_SETUP([%prec takes a token])
 900
 901 # Bison once allowed %prec sym where sym was a nonterminal.
 902
 903 AT_DATA([input.y],
 904 [[%%
 905 start: PREC %prec PREC ;
 906 PREC: ;
 907 ]])
 908
 909 AT_BISON_CHECK([input.y], [1], [],
 910 [[input.y:3.1-4: error: rule given for PREC, which is a token
 911 ]])
 912
 913 AT_CLEANUP
 914
 915
 916 ## ------------------------------- ##
 917 ## %prec's token must be defined.  ##
 918 ## ------------------------------- ##
 919
 920 AT_SETUP([[%prec's token must be defined]])
 921
 922 # According to POSIX, a %prec token must be defined separately.
 923
 924 AT_DATA([[input.y]],
 925 [[%%
 926 start: %prec PREC ;
 927 ]])
 928
 929 AT_BISON_CHECK([[input.y]], [[0]], [],
 930 [[input.y:2.8-17: warning: token for %prec is not defined: PREC [-Wother]
 931 ]])
 932
 933 AT_CLEANUP
 934
 935
 936 ## -------------------------------- ##
 937 ## Reject unused %code qualifiers.  ##
 938 ## -------------------------------- ##
 939
 940 AT_SETUP([Reject unused %code qualifiers])
 941
 942 AT_DATA([input-c.y],
 943 [[%code q {}
 944 %code bad {}
 945 %code bad {}
 946 %code format {}
 947 %%
 948 start: ;
 949 ]])
 950 AT_BISON_CHECK([[input-c.y]], [[1]], [],
 951 [[input-c.y:1.7: error: %code qualifier 'q' is not used
 952 input-c.y:2.7-9: error: %code qualifier 'bad' is not used
 953 input-c.y:3.7-9: error: %code qualifier 'bad' is not used
 954 input-c.y:4.7-12: error: %code qualifier 'format' is not used
 955 ]])
 956
 957 AT_DATA([input-c-glr.y],
 958 [[%code q {}
 959 %code bad {}
 960  %code bad {}
 961 %%
 962 start: ;
 963 ]])
 964 AT_BISON_CHECK([[input-c-glr.y]], [[1]], [],
 965 [[input-c-glr.y:1.7: error: %code qualifier 'q' is not used
 966 input-c-glr.y:2.7-9: error: %code qualifier 'bad' is not used
 967 input-c-glr.y:3.8-10: error: %code qualifier 'bad' is not used
 968 ]])
 969
 970 AT_DATA([input-c++.y],
 971 [[%code q {}
 972 %code bad {}
 973  %code q {}
 974 %%
 975 start: ;
 976 ]])
 977 AT_BISON_CHECK([[input-c++.y]], [[1]], [],
 978 [[input-c++.y:1.7: error: %code qualifier 'q' is not used
 979 input-c++.y:2.7-9: error: %code qualifier 'bad' is not used
 980 input-c++.y:3.8: error: %code qualifier 'q' is not used
 981 ]])
 982
 983 AT_DATA([input-c++-glr.y],
 984 [[%code bad {}
 985 %code q {}
 986 %code q {}
 987 %%
 988 start: ;
 989 ]])
 990 AT_BISON_CHECK([[input-c++-glr.y]], [[1]], [],
 991 [[input-c++-glr.y:1.7-9: error: %code qualifier 'bad' is not used
 992 input-c++-glr.y:2.7: error: %code qualifier 'q' is not used
 993 input-c++-glr.y:3.7: error: %code qualifier 'q' is not used
 994 ]])
 995
 996 AT_DATA([special-char-@@.y],
 997 [[%code bad {}
 998 %code q {}
 999 %code q {}
1000 %%
1001 start: ;
1002 ]])
1003 AT_BISON_CHECK([[special-char-@@.y]], [[1]], [],
1004 [[special-char-@@.y:1.7-9: error: %code qualifier 'bad' is not used
1005 special-char-@@.y:2.7: error: %code qualifier 'q' is not used
1006 special-char-@@.y:3.7: error: %code qualifier 'q' is not used
1007 ]])
1008
1009 AT_DATA([special-char-@:>@.y],
1010 [[%code bad {}
1011 %code q {}
1012 %code q {}
1013 %%
1014 start: ;
1015 ]])
1016 AT_BISON_CHECK([[special-char-@:>@.y]], [[1]], [],
1017 [[special-char-@:>@.y:1.7-9: error: %code qualifier 'bad' is not used
1018 special-char-@:>@.y:2.7: error: %code qualifier 'q' is not used
1019 special-char-@:>@.y:3.7: error: %code qualifier 'q' is not used
1020 ]])
1021
1022 AT_CLEANUP
1023
1024
1025 ## ---------------- ##
1026 ## %define errors.  ##
1027 ## ---------------- ##
1028
1029 AT_SETUP([%define errors])
1030
1031 AT_DATA([input-redefined.y],
1032 [[%define var "value1"
1033 %define var "value1"
1034  %define var "value2"
1035 %define special1 "@:>@"
1036 %define special2 "@<:@"
1037 %%
1038 start: ;
1039 ]])
1040
1041 AT_BISON_CHECK([[input-redefined.y]], [[1]], [],
1042 [[input-redefined.y:2.9-11: error: %define variable 'var' redefined
1043 input-redefined.y:1.9-11:     previous definition
1044 input-redefined.y:3.10-12: error: %define variable 'var' redefined
1045 input-redefined.y:2.9-11:      previous definition
1046 ]])
1047
1048 AT_DATA([input-unused.y],
1049 [[%define var "value"
1050 %%
1051 start: ;
1052 ]])
1053
1054 AT_BISON_CHECK([[input-unused.y]], [[1]], [],
1055 [[input-unused.y:1.9-11: error: %define variable 'var' is not used
1056 ]])
1057
1058 AT_CLEANUP
1059
1060
1061 ## ----------------------------------- ##
1062 ## %define, --define, --force-define.  ##
1063 ## ----------------------------------- ##
1064
1065 AT_SETUP([[%define, --define, --force-define]])
1066
1067 AT_DATA([[skel.c]],
1068 [[m4@&t@_divert_push(0)@
1069 @output(b4_parser_file_name@)@
1070 [var-dd: ]b4_percent_define_get([[var-dd]])[
1071 var-ff: ]b4_percent_define_get([[var-ff]])[
1072 var-dfg: ]b4_percent_define_get([[var-dfg]])[
1073 var-fd: ]b4_percent_define_get([[var-fd]])
1074 m4@&t@_divert_pop(0)
1075 ]])
1076 AT_DATA([[input.y]],
1077 [[%define var-dfg "gram"
1078 %%
1079 start: ;
1080 ]])
1081 AT_BISON_CHECK([[-Dvar-dd=cmd-d1 -Dvar-dd=cmd-d2 \
1082                  -Fvar-ff=cmd-f1 -Fvar-ff=cmd-f2 \
1083                  -Dvar-dfg=cmd-d -Fvar-dfg=cmd-f \
1084                  -Fvar-fd=cmd-f -Dvar-fd=cmd-d   \
1085                  --skeleton ./skel.c input.y]])
1086 AT_CHECK([[cat input.tab.c]], [[0]],
1087 [[var-dd: cmd-d2
1088 var-ff: cmd-f2
1089 var-dfg: cmd-f
1090 var-fd: cmd-d
1091 ]])
1092
1093 AT_DATA([[input-dg.y]],
1094 [[%define var "gram"
1095 %%
1096 start: ;
1097 ]])
1098 AT_BISON_CHECK([[-Dvar=cmd-d input-dg.y]], [[1]], [],
1099 [[input-dg.y:1.9-11: error: %define variable 'var' redefined
1100 <command line>:2:      previous definition
1101 ]])
1102
1103 AT_DATA([[input-unused.y]],
1104 [[%%
1105 start: ;
1106 ]])
1107 AT_BISON_CHECK([[-Dunused-d -Funused-f input-unused.y]], [[1]], [],
1108 [[<command line>:2: error: %define variable 'unused-d' is not used
1109 <command line>:3: error: %define variable 'unused-f' is not used
1110 ]])
1111
1112 AT_CLEANUP
1113
1114 ## --------------------------- ##
1115 ## %define Boolean variables.  ##
1116 ## --------------------------- ##
1117
1118 AT_SETUP([[%define Boolean variables]])
1119
1120 AT_DATA([Input.y],
1121 [[%language "Java"
1122 %define public "maybe"
1123 %define parser_class_name "Input"
1124 %%
1125 start: ;
1126 ]])
1127
1128 AT_BISON_CHECK([[Input.y]], [1], [],
1129 [[Input.y:2.9-14: error: invalid value for %define Boolean variable 'public'
1130 ]])
1131
1132 AT_CLEANUP
1133
1134 ## ------------------------ ##
1135 ## %define enum variables.  ##
1136 ## ------------------------ ##
1137
1138 AT_SETUP([[%define enum variables]])
1139
1140 # Front-end.
1141 AT_DATA([[input.y]],
1142 [[%define lr.default-reduction bogus
1143 %%
1144 start: ;
1145 ]])
1146 AT_BISON_CHECK([[input.y]], [[1]], [[]],
1147 [[input.y:1.9-28: error: invalid value for %define variable 'lr.default-reduction': 'bogus'
1148 input.y:1.9-28:     accepted value: 'most'
1149 input.y:1.9-28:     accepted value: 'consistent'
1150 input.y:1.9-28:     accepted value: 'accepting'
1151 ]])
1152
1153 # Back-end.
1154 # FIXME: these should be indented, but we shouldn't mess with the m4 yet
1155 AT_DATA([[input.y]],
1156 [[%define api.push-pull neither
1157 %%
1158 start: ;
1159 ]])
1160 AT_BISON_CHECK([[input.y]], [1], [],
1161 [[input.y:1.9-21: error: invalid value for %define variable 'api.push-pull': 'neither'
1162 input.y:1.9-21:     accepted value: 'pull'
1163 input.y:1.9-21:     accepted value: 'push'
1164 input.y:1.9-21:     accepted value: 'both'
1165 ]])
1166
1167 AT_CLEANUP
1168
1169 ## -------------------------------- ##
1170 ## %define backward compatibility.  ##
1171 ## -------------------------------- ##
1172
1173 AT_SETUP([[%define backward compatibility]])
1174
1175 # The error messages tell us whether underscores in these variables are
1176 # being converted to dashes.
1177
1178 AT_DATA([[input.y]],
1179 [[%define api.push_pull "neither"
1180 %%
1181 start: ;
1182 ]])
1183 AT_BISON_CHECK([[input.y]], [1], [],
1184 [[input.y:1.9-21: warning: deprecated %define variable name: 'api.push_pull', use 'api.push-pull' [-Wdeprecated]
1185 input.y:1.9-21: error: invalid value for %define variable 'api.push-pull': 'neither'
1186 input.y:1.9-21:     accepted value: 'pull'
1187 input.y:1.9-21:     accepted value: 'push'
1188 input.y:1.9-21:     accepted value: 'both'
1189 ]])
1190
1191 AT_DATA([[input.y]],
1192 [[%define lr.keep_unreachable_states maybe
1193 %%
1194 start: ;
1195 ]])
1196 AT_BISON_CHECK([[input.y]], [1], [],
1197 [[input.y:1.9-34: warning: deprecated %define variable name: 'lr.keep_unreachable_states', use 'lr.keep-unreachable-state' [-Wdeprecated]
1198 input.y:1.9-34: error: invalid value for %define Boolean variable 'lr.keep-unreachable-state'
1199 ]])
1200
1201 AT_DATA([[input.y]],
1202 [[%define namespace "foo"
1203 %define api.namespace "foo"
1204 %%
1205 start: ;
1206 ]])
1207 AT_BISON_CHECK([[input.y]], [1], [],
1208 [[input.y:1.9-17: warning: deprecated %define variable name: 'namespace', use 'api.namespace' [-Wdeprecated]
1209 input.y:2.9-21: error: %define variable 'api.namespace' redefined
1210 input.y:1.9-17:     previous definition
1211 ]])
1212
1213 AT_DATA([[input.y]],
1214 [[%define foo_bar "baz"
1215 %%
1216 start: ;
1217 ]])
1218 AT_BISON_CHECK([[input.y]], [[1]], [],
1219 [[input.y:1.9-15: error: %define variable 'foo_bar' is not used
1220 ]])
1221
1222 AT_CLEANUP
1223
1224 ## ------------------------- ##
1225 ## Unused %define api.pure.  ##
1226 ## ------------------------- ##
1227
1228 AT_SETUP([[Unused %define api.pure]])
1229
1230 # AT_CHECK_API_PURE(DECLS, VALUE)
1231 # -------------------------------
1232 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
1233 # are specified.
1234 m4_define([AT_CHECK_API_PURE],
1235 [
1236 AT_DATA([[input.y]],
1237 [[%define api.pure ]$2[
1238 ]$1[
1239 %%
1240 start: ;
1241 ]])
1242
1243 AT_BISON_CHECK([[input.y]], [[1]], [],
1244 [[input.y:1.9-16: error: %define variable 'api.pure' is not used
1245 ]])
1246 ])
1247
1248 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
1249 AT_CHECK_API_PURE([[%language "c++" %defines]], [[false]])
1250 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
1251 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[false]])
1252 AT_CHECK_API_PURE([[%language "java"]], [[true]])
1253 AT_CHECK_API_PURE([[%language "java"]], [[false]])
1254
1255 AT_CLEANUP
1256
1257 ## -------------------------------- ##
1258 ## C++ namespace reference errors.  ##
1259 ## -------------------------------- ##
1260
1261 AT_SETUP([[C++ namespace reference errors]])
1262
1263 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
1264 # -------------------------------------------------------------
1265 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
1266 m4_define([AT_CHECK_NAMESPACE_ERROR],
1267 [
1268 AT_DATA([[input.y]],
1269 [[%language "C++"
1270 %defines
1271 %define api.namespace "]$1["
1272 %%
1273 start: ;
1274 ]])
1275
1276 AT_BISON_CHECK([[input.y]], [1], [],
1277 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
1278 [[input.y:3.9-21: error: ]b4_arg[
1279 ]])])
1280 ])
1281
1282 AT_CHECK_NAMESPACE_ERROR([[]],
1283                          [[namespace reference is empty]])
1284 AT_CHECK_NAMESPACE_ERROR([[                             ]],
1285                          [[namespace reference is empty]])
1286 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
1287                          [[namespace reference has consecutive "::"]])
1288 AT_CHECK_NAMESPACE_ERROR([[foo::        ::bar]],
1289                          [[namespace reference has consecutive "::"]])
1290 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
1291                          [[namespace reference has consecutive "::"]])
1292 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
1293                          [[namespace reference has consecutive "::"]])
1294 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ::]],
1295                          [[namespace reference has consecutive "::"]],
1296                          [[namespace reference has a trailing "::"]])
1297 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
1298                          [[namespace reference has a trailing "::"]])
1299 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ]],
1300                          [[namespace reference has a trailing "::"]])
1301 AT_CHECK_NAMESPACE_ERROR([[::]],
1302                          [[namespace reference has a trailing "::"]])
1303
1304 AT_CLEANUP
1305
1306 ## ------------------------ ##
1307 ## Bad character literals.  ##
1308 ## ------------------------ ##
1309
1310 # Bison used to accept character literals that were empty or contained
1311 # too many characters.
1312
1313 # FIXME: AT_DATA or some variant of AT_DATA may eventually permit
1314 # the final newline to be omitted.  See the threads starting at
1315 # <http://lists.gnu.org/archive/html/bison-patches/2009-07/msg00019.html>.
1316
1317 AT_SETUP([[Bad character literals]])
1318
1319 AT_DATA([empty.y],
1320 [[%%
1321 start: '';
1322 start: '
1323 ]])
1324 AT_CHECK([[$PERL -e "print 'start: \'';" >> empty.y || exit 77]])
1325
1326 AT_BISON_CHECK([empty.y], [1], [],
1327 [[empty.y:2.8-9: warning: empty character literal [-Wother]
1328 empty.y:3.8-4.0: warning: empty character literal [-Wother]
1329 empty.y:3.8-4.0: error: missing "'" at end of line
1330 empty.y:4.8: warning: empty character literal [-Wother]
1331 empty.y:4.8: error: missing "'" at end of file
1332 ]])
1333
1334 AT_DATA([two.y],
1335 [[%%
1336 start: 'ab';
1337 start: 'ab
1338 ]])
1339 AT_CHECK([[$PERL -e "print 'start: \'ab';" >> two.y || exit 77]])
1340
1341 AT_BISON_CHECK([two.y], [1], [],
1342 [[two.y:2.8-11: warning: extra characters in character literal [-Wother]
1343 two.y:3.8-4.0: warning: extra characters in character literal [-Wother]
1344 two.y:3.8-4.0: error: missing "'" at end of line
1345 two.y:4.8-10: warning: extra characters in character literal [-Wother]
1346 two.y:4.8-10: error: missing "'" at end of file
1347 ]])
1348
1349 AT_DATA([three.y],
1350 [[%%
1351 start: 'abc';
1352 start: 'abc
1353 ]])
1354 AT_CHECK([[$PERL -e "print 'start: \'abc';" >> three.y || exit 77]])
1355
1356 AT_BISON_CHECK([three.y], [1], [],
1357 [[three.y:2.8-12: warning: extra characters in character literal [-Wother]
1358 three.y:3.8-4.0: warning: extra characters in character literal [-Wother]
1359 three.y:3.8-4.0: error: missing "'" at end of line
1360 three.y:4.8-11: warning: extra characters in character literal [-Wother]
1361 three.y:4.8-11: error: missing "'" at end of file
1362 ]])
1363
1364 AT_CLEANUP
1365
1366 ## ------------------------- ##
1367 ## Bad escapes in literals.  ##
1368 ## ------------------------- ##
1369
1370 AT_SETUP([[Bad escapes in literals]])
1371
1372 AT_DATA([input.y],
1373 [[%%
1374 start: '\777' '\0' '\xfff' '\x0'
1375        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
1376        '\ ' '\A';
1377 ]])
1378
1379 # It is not easy to create special characters, we cannot even trust tr.
1380 # Beside we cannot even expect "echo '\0'" to output two characters
1381 # (well three with \n): at least Bash 3.2 converts the two-character
1382 # sequence "\0" into a single NUL character.
1383 AT_CHECK([[$PERL -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
1384            || exit 77]])
1385
1386 AT_BISON_CHECK([input.y], [1], [],
1387 [[input.y:2.9-12: error: invalid number after \-escape: 777
1388 input.y:2.8-13: warning: empty character literal [-Wother]
1389 input.y:2.16-17: error: invalid number after \-escape: 0
1390 input.y:2.15-18: warning: empty character literal [-Wother]
1391 input.y:2.21-25: error: invalid number after \-escape: xfff
1392 input.y:2.20-26: warning: empty character literal [-Wother]
1393 input.y:2.29-31: error: invalid number after \-escape: x0
1394 input.y:2.28-32: warning: empty character literal [-Wother]
1395 input.y:3.9-14: error: invalid number after \-escape: uffff
1396 input.y:3.8-15: warning: empty character literal [-Wother]
1397 input.y:3.18-23: error: invalid number after \-escape: u0000
1398 input.y:3.17-24: warning: empty character literal [-Wother]
1399 input.y:3.27-36: error: invalid number after \-escape: Uffffffff
1400 input.y:3.26-37: warning: empty character literal [-Wother]
1401 input.y:3.40-49: error: invalid number after \-escape: U00000000
1402 input.y:3.39-50: warning: empty character literal [-Wother]
1403 input.y:4.9-10: error: invalid character after \-escape: ' '
1404 input.y:4.8-11: warning: empty character literal [-Wother]
1405 input.y:4.14-15: error: invalid character after \-escape: A
1406 input.y:4.13-16: warning: empty character literal [-Wother]
1407 input.y:5.9-16: error: invalid character after \-escape: \t
1408 input.y:5.17: error: invalid character after \-escape: \f
1409 input.y:5.18: error: invalid character after \-escape: \0
1410 input.y:5.19: error: invalid character after \-escape: \001
1411 ]])
1412
1413 AT_CLEANUP
1414
1415 ## ------------------------- ##
1416 ## LAC: Errors for %define.  ##
1417 ## ------------------------- ##
1418
1419 AT_SETUP([[LAC: Errors for %define]])
1420
1421 AT_DATA([[input.y]],
1422 [[%%
1423 start: ;
1424 ]])
1425
1426 # parse.lac.* options are useless if LAC isn't actually activated.
1427 AT_BISON_CHECK([[-Dparse.lac.es-capacity-initial=1 input.y]],
1428                [[1]], [],
1429 [[<command line>:2: error: %define variable 'parse.lac.es-capacity-initial' is not used
1430 ]])
1431 AT_BISON_CHECK([[-Dparse.lac.memory-trace=full input.y]],
1432                [[1]], [],
1433 [[<command line>:2: error: %define variable 'parse.lac.memory-trace' is not used
1434 ]])
1435
1436 AT_CLEANUP
1437
1438 ## --------------------------------------------- ##
1439 ## -Werror is not affected by -Wnone and -Wall.  ##
1440 ## --------------------------------------------- ##
1441
1442 AT_SETUP([[-Werror is not affected by -Wnone and -Wall]])
1443
1444 AT_DATA([[input.y]],
1445 [[%%
1446 foo-bar: ;
1447 ]])
1448
1449 # -Werror is not enabled by -Wall or equivalent.
1450 AT_BISON_CHECK([[-Wall input.y]], [[0]], [[]],
1451 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
1452 ]])
1453 AT_BISON_CHECK([[-W input.y]], [[0]], [[]],
1454 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
1455 ]])
1456 AT_BISON_CHECK([[-Wno-none input.y]], [[0]], [[]],
1457 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
1458 ]])
1459
1460 # -Werror is not disabled by -Wnone or equivalent.
1461 AT_BISON_CHECK([[-Werror,none,yacc input.y]], [[1]], [[]], [[stderr]])
1462 AT_CHECK([[sed 's/^.*bison:/bison:/' stderr]], [[0]],
1463 [[input.y:2.1-7: error: POSIX Yacc forbids dashes in symbol names: foo-bar [-Werror=yacc]
1464 ]])
1465 [mv stderr experr]
1466 AT_BISON_CHECK([[-Werror,no-all,yacc input.y]], [[1]], [[]], [[experr]])
1467
1468 AT_CLEANUP
1469
1470
1471 ## ------------------------------------------------------ ##
1472 ## %name-prefix and %define api.prefix are incompatible.  ##
1473 ## ------------------------------------------------------ ##
1474
1475 AT_SETUP([[%name-prefix and %define api.prefix are incompatible]])
1476
1477 # AT_TEST(DIRECTIVES, OPTIONS, ERROR-LOCATION)
1478 # --------------------------------------------
1479 m4_pushdef([AT_TEST],
1480 [AT_DATA([[input.y]],
1481 [[$1
1482 %%
1483 exp:;
1484 ]])
1485 AT_BISON_CHECK([[$2 input.y]], [[1]], [[]],
1486 [[$3: error: '%name-prefix' and '%define api.prefix' cannot be used together
1487 ]])
1488 ])
1489
1490 AT_TEST([%define api.prefix foo %name-prefix "bar"], [], [input.y:1.9-18])
1491 AT_TEST([], [-Dapi.prefix=foo -p bar], [<command line>:2])
1492 AT_TEST([%name-prefix "bar"], [-Dapi.prefix=foo], [<command line>:2])
1493 AT_TEST([%define api.prefix foo], [-p bar], [input.y:1.9-18])
1494
1495 m4_popdef([AT_TEST])
1496
1497 AT_CLEANUP
1498
1499
1500 ## -------------- ##
1501 ## Stray $ or @.  ##
1502 ## -------------- ##
1503
1504 AT_SETUP([[Stray $ or @]])
1505
1506 # Give %printer and %destructor "<*> exp TOK" instead of "<*>" to
1507 # check that the warnings are reported once, not three times.
1508
1509 AT_DATA_GRAMMAR([[input.y]],
1510 [[%type <TYPE> exp
1511 %token <TYPE> TOK TOK2
1512 %destructor     { $%; @%; } <*> exp TOK;
1513 %initial-action { $%; @%; };
1514 %printer        { $%; @%; } <*> exp TOK;
1515 %%
1516 exp: TOK        { $%; @%; $$ = $1; };
1517 ]])
1518
1519 AT_BISON_CHECK([[input.y]], 0, [],
1520 [[input.y:11.19: warning: stray '$' [-Wother]
1521 input.y:11.23: warning: stray '@' [-Wother]
1522 input.y:12.19: warning: stray '$' [-Wother]
1523 input.y:12.23: warning: stray '@' [-Wother]
1524 input.y:13.19: warning: stray '$' [-Wother]
1525 input.y:13.23: warning: stray '@' [-Wother]
1526 input.y:15.19: warning: stray '$' [-Wother]
1527 input.y:15.23: warning: stray '@' [-Wother]
1528 ]])
1529
1530 AT_CLEANUP
1531
1532
1533
1534 ## ---------------- ##
1535 ## Code injection.  ##
1536 ## ---------------- ##
1537
1538
1539 AT_SETUP([[Code injection]])
1540
1541 m4_pattern_allow([^m4_errprintn$])
1542
1543 # AT_TEST([MACRO])
1544 # ----------------
1545 # Try to have MACRO be run by bison.
1546 m4_pushdef([AT_TEST],
1547 [AT_DATA([[input.y]],
1548 [[%type <$1(DEAD %type)> exp
1549 %token <$1(DEAD %token)> a
1550 %token b
1551 %initial-action
1552 {
1553   $$;
1554   $<$1(DEAD %initial-action)>$
1555 };
1556 %printer
1557 {
1558   $$
1559   $<$1(DEAD %printer)>$
1560 } <> <*>;
1561 %lex-param
1562 {
1563   $1(DEAD %lex-param)
1564 };
1565 %parse-param
1566 {
1567   $1(DEAD %parse-param)
1568 };
1569 %%
1570 exp:
1571   a a[name] b
1572   {
1573     $$;
1574     $][1;
1575     $<$1(DEAD action 1)>$
1576     $<$1(DEAD action 2)>1
1577     $<$1(DEAD action 3)>name
1578     $<$1(DEAD action 4)>0
1579     ;
1580   };
1581 ]])
1582
1583 # FIXME: Provide a means to iterate over all the skeletons.
1584 AT_BISON_CHECK([[-d               input.y]])
1585 AT_BISON_CHECK([[-d -S glr.c      input.y]])
1586 AT_BISON_CHECK([[-d -S lalr1.cc   input.y]])
1587 AT_BISON_CHECK([[-d -S glr.cc     input.y]])
1588 AT_BISON_CHECK([[   -S lalr1.java input.y]])
1589 ])
1590
1591 AT_TEST([m4_errprintn])
1592 AT_TEST([@:>@m4_errprintn])
1593
1594 m4_popdef([AT_TEST])
1595
1596 AT_CLEANUP