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 inputs.  ##
  25 ## ---------------- ##
  26
  27 AT_SETUP([Invalid inputs])
  28
  29 AT_DATA([input.y],
  30 [[\000\001\002\377?
  31 %%
  32 ?
  33 default: 'a' }
  34 %&
  35 %a-does-not-exist
  36 %-
  37 %{
  38 ]])
  39 AT_CHECK([[$PERL -pi -e 's/\\(\d{3})/chr(oct($1))/ge' input.y || exit 77]])
  40
  41 AT_BISON_CHECK([input.y], [1], [],
  42 [[input.y:1.1-2: error: invalid characters: '\0\001\002\377?'
  43 input.y:3.1: error: invalid character: '?'
  44 input.y:4.14: error: invalid character: '}'
  45 input.y:5.1: error: invalid character: '%'
  46 input.y:5.2: error: invalid character: '&'
  47 input.y:6.1-17: error: invalid directive: '%a-does-not-exist'
  48 input.y:7.1: error: invalid character: '%'
  49 input.y:7.2: error: invalid character: '-'
  50 input.y:8.1-9.0: error: missing '%}' at end of file
  51 input.y:8.1-9.0: error: syntax error, unexpected %{...%}
  52 ]])
  53
  54 AT_CLEANUP
  55
  56
  57 AT_SETUP([Invalid inputs with {}])
  58
  59 # We used to SEGV here.  See
  60 # http://lists.gnu.org/archive/html/bug-bison/2005-07/msg00053.html
  61
  62 AT_DATA([input.y],
  63 [[
  64 %destructor
  65 %initial-action
  66 %lex-param
  67 %parse-param
  68 %printer
  69 %union
  70 ]])
  71
  72 AT_BISON_CHECK([input.y], [1], [],
  73 [[input.y:3.1-15: error: syntax error, unexpected %initial-action, expecting {...}
  74 ]])
  75
  76 AT_CLEANUP
  77
  78
  79
  80 ## ------------ ##
  81 ## Invalid $n.  ##
  82 ## ------------ ##
  83
  84 AT_SETUP([Invalid $n and @n])
  85
  86 AT_DATA([input.y],
  87 [[%%
  88 exp: { $$ = $1 ; };
  89 exp: { @$ = @1 ; };
  90 ]])
  91
  92 AT_BISON_CHECK([input.y], [1], [],
  93 [[input.y:2.13-14: error: integer out of range: '$1'
  94 input.y:3.13-14: error: integer out of range: '@1'
  95 ]])
  96
  97 AT_CLEANUP
  98
  99
 100 ## -------------- ##
 101 ## Type Clashes.  ##
 102 ## -------------- ##
 103
 104 AT_SETUP([Type Clashes])
 105
 106 AT_DATA([input.y],
 107 [[%union { int bar; }
 108 %token foo
 109 %type <bar> exp
 110 %%
 111 exp: foo { $$; } foo { $2; } foo
 112    | foo
 113    | /* Empty. */
 114    ;
 115 ]])
 116
 117 AT_BISON_CHECK([input.y], [1], [],
 118 [[input.y:5.12-13: error: $$ for the midrule at $2 of 'exp' has no declared type
 119 input.y:5.24-25: error: $2 of 'exp' has no declared type
 120 input.y:5.6-32: warning: type clash on default action: <bar> != <>
 121 input.y:6.6-8: warning: type clash on default action: <bar> != <>
 122 input.y:7.5: warning: empty rule for typed nonterminal, and no action
 123 ]])
 124
 125 AT_CLEANUP
 126
 127
 128 # _AT_UNUSED_VALUES_DECLARATIONS()
 129 # --------------------------------
 130 # Generate the token, type, and destructor
 131 # declarations for the unused values tests.
 132
 133 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
 134 [[[%token <integer> INT;
 135 %type <integer> a b c d e f g h i j k l;
 136 %destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
 137
 138
 139 # AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER, CHECK_MIDRULE_VALUES)
 140 # ------------------------------------------------------------------
 141 # Generate a grammar to test unused values,
 142 # compile it, run it.  If DECLARATIONS_AFTER
 143 # is set, then the token, type, and destructor
 144 # declarations are generated after the rules
 145 # rather than before.  If CHECK_MIDRULE_VALUES
 146 # is set, then --warnings=midrule-values is
 147 # set.
 148
 149 m4_define([AT_CHECK_UNUSED_VALUES],
 150 [AT_DATA([input.y],
 151 m4_ifval($1, [
 152
 153
 154 ], [_AT_UNUSED_VALUES_DECLARATIONS
 155 ])[[%%
 156 start:
 157   'a' a { $]2[; } | 'b' b { $]2[; } | 'c' c { $]2[; } | 'd' d { $]2[; }
 158 | 'e' e { $]2[; } | 'f' f { $]2[; } | 'g' g { $]2[; } | 'h' h { $]2[; }
 159 | 'i' i { $]2[; } | 'j' j { $]2[; } | 'k' k { $]2[; } | 'l' l { $]2[; }
 160 ;
 161
 162 a: INT | INT { } INT { } INT { };
 163 b: INT | /* empty */;
 164 c: INT | INT { $]1[; } INT { $<integer>2; } INT { $<integer>4; };
 165 d: INT | INT { } INT { $]1[; } INT { $<integer>2; };
 166 e: INT | INT { } INT {  } INT { $]1[; };
 167 f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
 168 g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
 169 h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
 170 i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
 171 j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
 172 k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
 173 l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
 174 _AT_UNUSED_VALUES_DECLARATIONS])
 175 )
 176
 177 AT_BISON_CHECK(m4_ifval($2, [ --warnings=midrule-values ])[ input.y], [0], [],
 178 [[input.y:11.10-32: warning: unset value: $]$[
 179 input.y:11.10-32: warning: unused value: $]1[
 180 input.y:11.10-32: warning: unused value: $]3[
 181 input.y:11.10-32: warning: unused value: $]5[
 182 input.y:12.9: warning: empty rule for typed nonterminal, and no action
 183 ]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $$
 184 input.y:13.26-41: warning: unset value: $$
 185 ]]])[[input.y:13.10-62: warning: unset value: $]$[
 186 input.y:13.10-62: warning: unused value: $]3[
 187 input.y:13.10-62: warning: unused value: $]5[
 188 ]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
 189 ]]])[[input.y:14.10-49: warning: unset value: $]$[
 190 input.y:14.10-49: warning: unused value: $]3[
 191 input.y:14.10-49: warning: unused value: $]5[
 192 input.y:15.10-37: warning: unset value: $]$[
 193 input.y:15.10-37: warning: unused value: $]3[
 194 input.y:15.10-37: warning: unused value: $]5[
 195 input.y:17.10-58: warning: unset value: $]$[
 196 input.y:17.10-58: warning: unused value: $]1[
 197 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
 198 ]]])[[input.y:17.10-58: warning: unused value: $]3[
 199 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[
 200 ]]])[[input.y:17.10-58: warning: unused value: $]5[
 201 input.y:18.10-72: warning: unset value: $]$[
 202 input.y:18.10-72: warning: unused value: $]1[
 203 input.y:18.10-72: warning: unused value: $]3[
 204 ]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
 205 ]]])[[input.y:18.10-72: warning: unused value: $]5[
 206 ]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[
 207 ]]])[[input.y:21.10-68: warning: unset value: $]$[
 208 input.y:21.10-68: warning: unused value: $]1[
 209 input.y:21.10-68: warning: unused value: $]2[
 210 ]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
 211 ]]]))])
 212
 213
 214 ## --------------- ##
 215 ## Unused values.  ##
 216 ## --------------- ##
 217
 218 AT_SETUP([Unused values])
 219 AT_CHECK_UNUSED_VALUES
 220 AT_CHECK_UNUSED_VALUES(, [1])
 221 AT_CLEANUP
 222
 223
 224 ## ------------------------------------------ ##
 225 ## Unused values before symbol declarations.  ##
 226 ## ------------------------------------------ ##
 227
 228 AT_SETUP([Unused values before symbol declarations])
 229 AT_CHECK_UNUSED_VALUES([1])
 230 AT_CHECK_UNUSED_VALUES([1], [1])
 231 AT_CLEANUP
 232
 233
 234 ## --------------------------------------------- ##
 235 ## Default %printer and %destructor redeclared.  ##
 236 ## --------------------------------------------- ##
 237
 238 AT_SETUP([Default %printer and %destructor redeclared])
 239
 240 AT_DATA([[input.y]],
 241 [[%destructor { destroy ($$); } <*> <*>
 242 %printer { print ($$); } <*> <*>
 243
 244 %destructor { destroy ($$); } <*>
 245 %printer { print ($$); } <*>
 246
 247 %destructor { destroy ($$); } <> <>
 248 %printer { print ($$); } <> <>
 249
 250 %destructor { destroy ($$); } <>
 251 %printer { print ($$); } <>
 252
 253 %%
 254
 255 start: ;
 256
 257 %destructor { destroy ($$); } <*>;
 258 %printer { print ($$); } <*>;
 259
 260 %destructor { destroy ($$); } <>;
 261 %printer { print ($$); } <>;
 262 ]])
 263
 264 AT_BISON_CHECK([input.y], [1], [],
 265 [[input.y:1.13-29: error: redeclaration for default tagged %destructor
 266 input.y:1.13-29:     previous declaration
 267 input.y:2.10-24: error: redeclaration for default tagged %printer
 268 input.y:2.10-24:     previous declaration
 269 input.y:4.13-29: error: redeclaration for default tagged %destructor
 270 input.y:1.13-29:     previous declaration
 271 input.y:5.10-24: error: redeclaration for default tagged %printer
 272 input.y:2.10-24:     previous declaration
 273 input.y:7.13-29: error: redeclaration for default tagless %destructor
 274 input.y:7.13-29:     previous declaration
 275 input.y:8.10-24: error: redeclaration for default tagless %printer
 276 input.y:8.10-24:     previous declaration
 277 input.y:10.13-29: error: redeclaration for default tagless %destructor
 278 input.y:7.13-29:      previous declaration
 279 input.y:11.10-24: error: redeclaration for default tagless %printer
 280 input.y:8.10-24:      previous declaration
 281 input.y:17.13-29: error: redeclaration for default tagged %destructor
 282 input.y:4.13-29:      previous declaration
 283 input.y:18.10-24: error: redeclaration for default tagged %printer
 284 input.y:5.10-24:      previous declaration
 285 input.y:20.13-29: error: redeclaration for default tagless %destructor
 286 input.y:10.13-29:     previous declaration
 287 input.y:21.10-24: error: redeclaration for default tagless %printer
 288 input.y:11.10-24:     previous declaration
 289 ]])
 290
 291 AT_CLEANUP
 292
 293
 294 ## ---------------------------------------------- ##
 295 ## Per-type %printer and %destructor redeclared.  ##
 296 ## ---------------------------------------------- ##
 297
 298 AT_SETUP([Per-type %printer and %destructor redeclared])
 299
 300 AT_DATA([[input.y]],
 301 [[%destructor { destroy ($$); } <field1> <field2>
 302 %printer { print ($$); } <field1> <field2>
 303
 304 %destructor { destroy ($$); } <field1> <field1>
 305 %printer { print ($$); } <field2> <field2>
 306
 307 %%
 308
 309 start: ;
 310
 311 %destructor { destroy ($$); } <field2> <field1>;
 312 %printer { print ($$); } <field2> <field1>;
 313 ]])
 314
 315 AT_BISON_CHECK([input.y], [1], [],
 316 [[input.y:4.13-29: error: %destructor redeclaration for <field1>
 317 input.y:1.13-29:     previous declaration
 318 input.y:4.13-29: error: %destructor redeclaration for <field1>
 319 input.y:4.13-29:     previous declaration
 320 input.y:5.10-24: error: %printer redeclaration for <field2>
 321 input.y:2.10-24:     previous declaration
 322 input.y:5.10-24: error: %printer redeclaration for <field2>
 323 input.y:5.10-24:     previous declaration
 324 input.y:11.13-29: error: %destructor redeclaration for <field1>
 325 input.y:4.13-29:      previous declaration
 326 input.y:11.13-29: error: %destructor redeclaration for <field2>
 327 input.y:1.13-29:      previous declaration
 328 input.y:12.10-24: error: %printer redeclaration for <field1>
 329 input.y:2.10-24:      previous declaration
 330 input.y:12.10-24: error: %printer redeclaration for <field2>
 331 input.y:5.10-24:      previous declaration
 332 ]])
 333
 334 AT_CLEANUP
 335
 336
 337 ## ---------------------------------------- ##
 338 ## Unused values with default %destructor.  ##
 339 ## ---------------------------------------- ##
 340
 341 AT_SETUP([Unused values with default %destructor])
 342
 343 AT_DATA([[input.y]],
 344 [[%destructor { destroy ($$); } <>
 345 %type <tag> tagged
 346
 347 %%
 348
 349 start: end end tagged tagged { $<tag>1; $3; } ;
 350 end: { } ;
 351 tagged: { } ;
 352 ]])
 353
 354 AT_BISON_CHECK([input.y], [0], [],
 355 [[input.y:6.8-45: warning: unset value: $$
 356 input.y:6.8-45: warning: unused value: $2
 357 input.y:7.6-8: warning: unset value: $$
 358 ]])
 359
 360 AT_DATA([[input.y]],
 361 [[%destructor { destroy ($$); } <*>
 362 %type <tag> tagged
 363
 364 %%
 365
 366 start: end end tagged tagged { $<tag>1; $3; } ;
 367 end: { } ;
 368 tagged: { } ;
 369 ]])
 370
 371 AT_BISON_CHECK([input.y], [0], [],
 372 [[input.y:6.8-45: warning: unused value: $4
 373 input.y:8.9-11: warning: unset value: $$
 374 ]])
 375
 376 AT_CLEANUP
 377
 378
 379 ## ----------------------------------------- ##
 380 ## Unused values with per-type %destructor.  ##
 381 ## ----------------------------------------- ##
 382
 383 AT_SETUP([Unused values with per-type %destructor])
 384
 385 AT_DATA([[input.y]],
 386 [[%destructor { destroy ($$); } <field1>
 387 %type <field1> start end
 388
 389 %%
 390
 391 start: end end { $1; } ;
 392 end: { }  ;
 393 ]])
 394
 395 AT_BISON_CHECK([input.y], [0], [],
 396 [[input.y:6.8-22: warning: unset value: $$
 397 input.y:6.8-22: warning: unused value: $2
 398 input.y:7.6-8: warning: unset value: $$
 399 ]])
 400
 401 AT_CLEANUP
 402
 403
 404 ## ---------------------- ##
 405 ## Incompatible Aliases.  ##
 406 ## ---------------------- ##
 407
 408 AT_SETUP([Incompatible Aliases])
 409
 410 AT_DATA([input.y],
 411 [[%token foo "foo"
 412
 413 %type <bar>       foo
 414 %printer {bar}    foo
 415 %destructor {bar} foo
 416 %left             foo
 417
 418 %type <baz>       "foo"
 419 %printer {baz}    "foo"
 420 %destructor {baz} "foo"
 421 %left             "foo"
 422
 423 %%
 424 exp: foo;
 425 ]])
 426
 427 AT_BISON_CHECK([input.y], [1], [],
 428 [[input.y:8.7-11: error: %type redeclaration for foo
 429 input.y:3.7-11:     previous declaration
 430 input.y:10.13-17: error: %destructor redeclaration for foo
 431 input.y:5.13-17:      previous declaration
 432 input.y:9.10-14: error: %printer redeclaration for foo
 433 input.y:4.10-14:     previous declaration
 434 input.y:11.1-5: error: %left redeclaration for foo
 435 input.y:6.1-5:      previous declaration
 436 ]])
 437
 438 AT_CLEANUP
 439
 440
 441
 442 ## ----------------------- ##
 443 ## Torturing the Scanner.  ##
 444 ## ----------------------- ##
 445
 446 # Be sure to compile and run, so that the C compiler checks what
 447 # we do.
 448
 449 AT_SETUP([Torturing the Scanner])
 450
 451 AT_BISON_OPTION_PUSHDEFS
 452 AT_DATA([input.y], [])
 453 AT_BISON_CHECK([input.y], [1], [],
 454 [[input.y:1.1: error: syntax error, unexpected end of file
 455 ]])
 456
 457
 458 AT_DATA([input.y],
 459 [{}
 460 ])
 461 AT_BISON_CHECK([input.y], [1], [],
 462 [[input.y:1.1-2: error: syntax error, unexpected {...}
 463 ]])
 464
 465
 466 AT_DATA_GRAMMAR([input.y],
 467 [[%{
 468 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 469 const char *foo = "So %{ and %} can be here too.";
 470
 471 #if 0
 472 /* These examples test Bison while not stressing C compilers too much.
 473    Many C compilers mishandle backslash-newlines, so this part of the
 474    test is inside "#if 0".  The comment and string are written so that
 475    the "#endif" will be seen regardless of the C compiler bugs that we
 476    know about, namely:
 477
 478      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 479      comment.
 480
 481      The Apple Darwin compiler (as of late 2002) mishandles
 482      \\[newline]' within a character constant.
 483
 484    */
 485
 486 /\
 487 * A comment with backslash-newlines in it. %} *\
 488 \
 489 /
 490 /* { Close the above comment, if the C compiler mishandled it.  */
 491
 492 char str[] = "\\
 493 " A string with backslash-newlines in it %{ %} \\
 494 \
 495 "";
 496
 497 char apostrophe = '\'';
 498 #endif
 499
 500 #include <stdio.h>
 501 #include <stdlib.h>
 502 #include <assert.h>
 503 %}
 504 /* %{ and %} can be here too. */
 505
 506 %{
 507 /* Exercise pre-prologue dependency to %union.  */
 508 typedef int value;
 509 %}
 510
 511 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 512
 513 /* Also exercise %union. */
 514 %union
 515 {
 516   value ival; /* A comment to exercise an old bug. */
 517 };
 518
 519
 520 /* Exercise post-prologue dependency to %union.  */
 521 %{
 522 static YYSTYPE value_as_yystype (value val);
 523
 524 /* Exercise quotes in declarations.  */
 525 char quote[] = "@:>@@:>@,";
 526 %}
 527
 528 %{
 529 ]AT_YYERROR_DECLARE[
 530 ]AT_YYLEX_DECLARE[
 531 %}
 532
 533 %type <ival> '@<:@'
 534
 535 /* Exercise quotes in strings.  */
 536 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 537
 538 %%
 539 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 540 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 541   {
 542     /* Exercise quotes in braces.  */
 543     char tmp[] = "@<:@%c@:>@,\n";
 544     printf (tmp, $1);
 545   }
 546 ;
 547
 548 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 549 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 550 output.or.oline.opt: ;|oline;;|output;;;
 551 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 552 %%
 553 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 554
 555 static YYSTYPE
 556 value_as_yystype (value val)
 557 {
 558   YYSTYPE res;
 559   res.ival = val;
 560   return res;
 561 }
 562 ]AT_YYERROR_DEFINE[
 563 static int
 564 yylex (void)
 565 {
 566   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
 567 #output "; /* "
 568   */
 569   static size_t toknum;
 570   assert (toknum < sizeof input);
 571   yylval = value_as_yystype (input[toknum]);
 572   return input[toknum++];
 573 }
 574 ]])
 575
 576 # Pacify Emacs' font-lock-mode: "
 577
 578 AT_DATA([main.c],
 579 [[typedef int value;
 580 #include "input.h"
 581
 582 int yyparse (void);
 583
 584 int
 585 main (void)
 586 {
 587   return yyparse ();
 588 }
 589 ]])
 590 AT_BISON_OPTION_POPDEFS
 591
 592 AT_BISON_CHECK([-d -v -o input.c input.y])
 593 AT_COMPILE([input.o])
 594 AT_COMPILE([main.o])
 595 AT_COMPILE([input], [input.o main.o])
 596 AT_PARSER_CHECK([./input], 0,
 597 [[[@<:@],
 598 ]])
 599
 600 AT_CLEANUP
 601
 602
 603 ## ---------------------- ##
 604 ## Typed symbol aliases.  ##
 605 ## ---------------------- ##
 606
 607 AT_SETUP([Typed symbol aliases])
 608
 609 # Bison 2.0 broke typed symbol aliases - ensure they work.
 610
 611 AT_DATA_GRAMMAR([input.y],
 612 [[%union
 613 {
 614   int val;
 615 };
 616 %token <val> MY_TOKEN "MY TOKEN"
 617 %type <val> exp
 618 %%
 619 exp: "MY TOKEN";
 620 %%
 621 ]])
 622
 623 AT_BISON_CHECK([-o input.c input.y])
 624
 625 AT_CLEANUP
 626
 627
 628 ## --------- ##
 629 ## Require.  ##
 630 ## --------- ##
 631
 632 m4_define([AT_CHECK_REQUIRE],
 633 [AT_SETUP([Require $1])
 634 AT_DATA_GRAMMAR([input.y],
 635 [[%require "$1";
 636 %%
 637 empty_file:;
 638 ]])
 639 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
 640 AT_CLEANUP
 641 ])
 642
 643 AT_CHECK_REQUIRE(1.0, 0)
 644 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 645 ## FIXME: Some day augment this version number.
 646 AT_CHECK_REQUIRE(100.0, 63)
 647
 648
 649 ## ------------------------------------- ##
 650 ## String aliases for character tokens.  ##
 651 ## ------------------------------------- ##
 652
 653 AT_SETUP([String aliases for character tokens])
 654
 655 # Bison once thought a character token and its alias were different symbols
 656 # with the same user token number.
 657
 658 AT_DATA_GRAMMAR([input.y],
 659 [[%token 'a' "a"
 660 %%
 661 start: 'a';
 662 %%
 663 ]])
 664
 665 AT_BISON_CHECK([-o input.c input.y])
 666
 667 AT_CLEANUP
 668
 669
 670 ## -------------- ##
 671 ## Symbol names.  ##
 672 ## -------------- ##
 673
 674 AT_SETUP([Symbols])
 675
 676 AT_BISON_OPTION_PUSHDEFS
 677 AT_DATA_GRAMMAR([input.y],
 678 [[%token WITH-DASH
 679 %token WITHOUT_DASH "WITHOUT-DASH"
 680 %token WITH.PERIOD
 681 %token WITHOUT_PERIOD "WITHOUT.PERIOD"
 682 %code {
 683   ]AT_YYERROR_DECLARE[
 684   ]AT_YYLEX_DECLARE[
 685 }
 686 %%
 687 start: with-dash without_dash with.period without_period;
 688 with-dash: WITH-DASH;
 689 without_dash: "WITHOUT-DASH";
 690 with.period: WITH.PERIOD;
 691 without_period: "WITHOUT.PERIOD";
 692 %%
 693 ]AT_YYERROR_DEFINE[
 694 ]AT_YYLEX_DEFINE[
 695 ]])
 696 AT_BISON_OPTION_POPDEFS
 697
 698 # POSIX Yacc accept periods, but not dashes.
 699 AT_BISON_CHECK([--yacc input.y], [1], [],
 700 [[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 701 input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
 702 ]])
 703
 704 # So warn about them.
 705 AT_BISON_CHECK([-Wyacc input.y], [], [],
 706 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 707 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
 708 ]])
 709
 710 # Dashes are fine for GNU Bison.
 711 AT_BISON_CHECK([-o input.c input.y])
 712
 713 # Make sure we don't export silly token identifiers with periods or dashes.
 714 AT_COMPILE([input.o])
 715
 716
 717 # Periods are genuine letters, they can start identifiers.
 718 # Digits and dashes cannot.
 719 AT_DATA_GRAMMAR([input.y],
 720 [[%token .GOOD
 721          -GOOD
 722          1NV4L1D
 723          -123
 724 %%
 725 start: .GOOD GOOD
 726 ]])
 727 AT_BISON_CHECK([-o input.c input.y], [1], [],
 728 [[input.y:10.10: error: invalid character: '-'
 729 input.y:11.10-16: error: invalid identifier: '1NV4L1D'
 730 input.y:12.10: error: invalid character: '-'
 731 ]])
 732
 733 AT_CLEANUP
 734
 735
 736 ## ----------------- ##
 737 ## Numbered tokens.  ##
 738 ## ----------------- ##
 739
 740 AT_SETUP([Numbered tokens])
 741
 742 AT_DATA_GRAMMAR([redecl.y],
 743 [[%token DECIMAL_1     11259375
 744          HEXADECIMAL_1 0xabcdef
 745          HEXADECIMAL_2 0xFEDCBA
 746          DECIMAL_2     16702650
 747 %%
 748 start: DECIMAL_1 HEXADECIMAL_2;
 749 ]])
 750
 751 AT_BISON_CHECK([redecl.y], [1], [],
 752 [[redecl.y:10.10-22: error: user token number 11259375 redeclaration for HEXADECIMAL_1
 753 redecl.y:9.8-16:       previous declaration for DECIMAL_1
 754 redecl.y:12.10-18: error: user token number 16702650 redeclaration for DECIMAL_2
 755 redecl.y:11.10-22:     previous declaration for HEXADECIMAL_2
 756 ]])
 757
 758 AT_DATA_GRAMMAR([too-large.y],
 759 [[%token TOO_LARGE_DEC 999999999999999999999
 760          TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
 761 %%
 762 start: TOO_LARGE_DEC TOO_LARGE_HEX
 763 %%
 764 ]])
 765
 766 AT_BISON_CHECK([too-large.y], [1], [],
 767 [[too-large.y:9.22-42: error: integer out of range: '999999999999999999999'
 768 too-large.y:10.24-44: error: integer out of range: '0xFFFFFFFFFFFFFFFFFFF'
 769 ]])
 770
 771 AT_CLEANUP
 772
 773
 774 ## --------------------- ##
 775 ## Unclosed constructs.  ##
 776 ## --------------------- ##
 777
 778 AT_SETUP([Unclosed constructs])
 779
 780 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
 781 # they were prepended to whatever it STRING_GROW'ed next.  It also threw them
 782 # away rather than returning them to the parser.  The effect was confusing
 783 # subsequent error messages.
 784
 785 AT_DATA([input.y],
 786 [[%token A "a
 787 %token B "b"
 788 %token AB "ab" // Used to complain that "ab" was already used.
 789 %token C '1
 790 %token TWO "2"
 791 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
 792
 793 %%
 794
 795 start: ;
 796
 797 // Used to report a syntax error because it didn't see any kind of symbol
 798 // identifier.
 799 %type <f> 'a
 800 ;
 801 %type <f> "a
 802 ;
 803 // Used to report a syntax error because it didn't see braced code.
 804 %destructor { free ($$)
 805 ]])
 806
 807 AT_BISON_CHECK([-o input.c input.y], 1, [],
 808 [[input.y:1.10-2.0: error: missing '"' at end of line
 809 input.y:4.10-5.0: error: missing "'" at end of line
 810 input.y:14.11-15.0: error: missing "'" at end of line
 811 input.y:16.11-17.0: error: missing '"' at end of line
 812 input.y:19.13-20.0: error: missing '}' at end of file
 813 input.y:20.1: error: syntax error, unexpected end of file
 814 ]])
 815
 816 AT_CLEANUP
 817
 818
 819 ## ------------------------- ##
 820 ## %start after first rule.  ##
 821 ## ------------------------- ##
 822
 823 AT_SETUP([%start after first rule])
 824
 825 # Bison once complained that a %start after the first rule was a redeclaration
 826 # of the start symbol.
 827
 828 AT_DATA([input.y],
 829 [[%%
 830 false_start: ;
 831 start: false_start ;
 832 %start start;
 833 ]])
 834
 835 AT_BISON_CHECK([-o input.c input.y])
 836
 837 AT_CLEANUP
 838
 839
 840 ## --------------------- ##
 841 ## %prec takes a token.  ##
 842 ## --------------------- ##
 843
 844 AT_SETUP([%prec takes a token])
 845
 846 # Bison once allowed %prec sym where sym was a nonterminal.
 847
 848 AT_DATA([input.y],
 849 [[%%
 850 start: PREC %prec PREC ;
 851 PREC: ;
 852 ]])
 853
 854 AT_BISON_CHECK([input.y], [1], [],
 855 [[input.y:3.1-4: error: rule given for PREC, which is a token
 856 ]])
 857
 858 AT_CLEANUP
 859
 860
 861 ## ------------------------------- ##
 862 ## %prec's token must be defined.  ##
 863 ## ------------------------------- ##
 864
 865 AT_SETUP([[%prec's token must be defined]])
 866
 867 # According to POSIX, a %prec token must be defined separately.
 868
 869 AT_DATA([[input.y]],
 870 [[%%
 871 start: %prec PREC ;
 872 ]])
 873
 874 AT_BISON_CHECK([[input.y]], [[0]], [],
 875 [[input.y:2.8-17: warning: token for %prec is not defined: PREC
 876 ]])
 877
 878 AT_CLEANUP
 879
 880
 881 ## -------------------------------- ##
 882 ## Reject unused %code qualifiers.  ##
 883 ## -------------------------------- ##
 884
 885 AT_SETUP([Reject unused %code qualifiers])
 886
 887 AT_DATA([input-c.y],
 888 [[%code q {}
 889 %code bad {}
 890 %code bad {}
 891 %code format {}
 892 %%
 893 start: ;
 894 ]])
 895 AT_BISON_CHECK([[input-c.y]], [[1]], [],
 896 [[input-c.y:1.7: error: %code qualifier 'q' is not used
 897 input-c.y:2.7-9: error: %code qualifier 'bad' is not used
 898 input-c.y:3.7-9: error: %code qualifier 'bad' is not used
 899 input-c.y:4.7-12: error: %code qualifier 'format' is not used
 900 ]])
 901
 902 AT_DATA([input-c-glr.y],
 903 [[%code q {}
 904 %code bad {}
 905  %code bad {}
 906 %%
 907 start: ;
 908 ]])
 909 AT_BISON_CHECK([[input-c-glr.y]], [[1]], [],
 910 [[input-c-glr.y:1.7: error: %code qualifier 'q' is not used
 911 input-c-glr.y:2.7-9: error: %code qualifier 'bad' is not used
 912 input-c-glr.y:3.8-10: error: %code qualifier 'bad' is not used
 913 ]])
 914
 915 AT_DATA([input-c++.y],
 916 [[%code q {}
 917 %code bad {}
 918  %code q {}
 919 %%
 920 start: ;
 921 ]])
 922 AT_BISON_CHECK([[input-c++.y]], [[1]], [],
 923 [[input-c++.y:1.7: error: %code qualifier 'q' is not used
 924 input-c++.y:2.7-9: error: %code qualifier 'bad' is not used
 925 input-c++.y:3.8: error: %code qualifier 'q' is not used
 926 ]])
 927
 928 AT_DATA([input-c++-glr.y],
 929 [[%code bad {}
 930 %code q {}
 931 %code q {}
 932 %%
 933 start: ;
 934 ]])
 935 AT_BISON_CHECK([[input-c++-glr.y]], [[1]], [],
 936 [[input-c++-glr.y:1.7-9: error: %code qualifier 'bad' is not used
 937 input-c++-glr.y:2.7: error: %code qualifier 'q' is not used
 938 input-c++-glr.y:3.7: error: %code qualifier 'q' is not used
 939 ]])
 940
 941 AT_DATA([special-char-@@.y],
 942 [[%code bad {}
 943 %code q {}
 944 %code q {}
 945 %%
 946 start: ;
 947 ]])
 948 AT_BISON_CHECK([[special-char-@@.y]], [[1]], [],
 949 [[special-char-@@.y:1.7-9: error: %code qualifier 'bad' is not used
 950 special-char-@@.y:2.7: error: %code qualifier 'q' is not used
 951 special-char-@@.y:3.7: error: %code qualifier 'q' is not used
 952 ]])
 953
 954 AT_DATA([special-char-@:>@.y],
 955 [[%code bad {}
 956 %code q {}
 957 %code q {}
 958 %%
 959 start: ;
 960 ]])
 961 AT_BISON_CHECK([[special-char-@:>@.y]], [[1]], [],
 962 [[special-char-@:>@.y:1.7-9: error: %code qualifier 'bad' is not used
 963 special-char-@:>@.y:2.7: error: %code qualifier 'q' is not used
 964 special-char-@:>@.y:3.7: error: %code qualifier 'q' is not used
 965 ]])
 966
 967 AT_CLEANUP
 968
 969
 970 ## ---------------- ##
 971 ## %define errors.  ##
 972 ## ---------------- ##
 973
 974 AT_SETUP([%define errors])
 975
 976 AT_DATA([input-redefined.y],
 977 [[%define var "value1"
 978 %define var "value1"
 979  %define var "value2"
 980 %define special1 "@:>@"
 981 %define special2 "@<:@"
 982 %%
 983 start: ;
 984 ]])
 985
 986 AT_BISON_CHECK([[input-redefined.y]], [[1]], [],
 987 [[input-redefined.y:2.9-11: error: %define variable 'var' redefined
 988 input-redefined.y:1.9-11:     previous definition
 989 input-redefined.y:3.10-12: error: %define variable 'var' redefined
 990 input-redefined.y:2.9-11:      previous definition
 991 ]])
 992
 993 AT_DATA([input-unused.y],
 994 [[%define var "value"
 995 %%
 996 start: ;
 997 ]])
 998
 999 AT_BISON_CHECK([[input-unused.y]], [[1]], [],
1000 [[input-unused.y:1.9-11: error: %define variable 'var' is not used
1001 ]])
1002
1003 AT_CLEANUP
1004
1005
1006 ## ----------------------------------- ##
1007 ## %define, --define, --force-define.  ##
1008 ## ----------------------------------- ##
1009
1010 AT_SETUP([[%define, --define, --force-define]])
1011
1012 AT_DATA([[skel.c]],
1013 [[m4@&t@_divert_push(0)@
1014 @output(b4_parser_file_name@)@
1015 [var-dd: ]b4_percent_define_get([[var-dd]])[
1016 var-ff: ]b4_percent_define_get([[var-ff]])[
1017 var-dfg: ]b4_percent_define_get([[var-dfg]])[
1018 var-fd: ]b4_percent_define_get([[var-fd]])
1019 m4@&t@_divert_pop(0)
1020 ]])
1021 AT_DATA([[input.y]],
1022 [[%define var-dfg "gram"
1023 %%
1024 start: ;
1025 ]])
1026 AT_BISON_CHECK([[-Dvar-dd=cmd-d1 -Dvar-dd=cmd-d2 \
1027                  -Fvar-ff=cmd-f1 -Fvar-ff=cmd-f2 \
1028                  -Dvar-dfg=cmd-d -Fvar-dfg=cmd-f \
1029                  -Fvar-fd=cmd-f -Dvar-fd=cmd-d   \
1030                  --skeleton ./skel.c input.y]])
1031 AT_CHECK([[cat input.tab.c]], [[0]],
1032 [[var-dd: cmd-d2
1033 var-ff: cmd-f2
1034 var-dfg: cmd-f
1035 var-fd: cmd-d
1036 ]])
1037
1038 AT_DATA([[input-dg.y]],
1039 [[%define var "gram"
1040 %%
1041 start: ;
1042 ]])
1043 AT_BISON_CHECK([[-Dvar=cmd-d input-dg.y]], [[1]], [],
1044 [[input-dg.y:1.9-11: error: %define variable 'var' redefined
1045 <command line>:1:      previous definition
1046 ]])
1047
1048 AT_DATA([[input-unused.y]],
1049 [[%%
1050 start: ;
1051 ]])
1052 AT_BISON_CHECK([[-Dunused-d -Funused-f input-unused.y]], [[1]], [],
1053 [[<command line>:1: error: %define variable 'unused-d' is not used
1054 <command line>:2: error: %define variable 'unused-f' is not used
1055 ]])
1056
1057 AT_CLEANUP
1058
1059 ## --------------------------- ##
1060 ## %define Boolean variables.  ##
1061 ## --------------------------- ##
1062
1063 AT_SETUP([[%define Boolean variables]])
1064
1065 AT_DATA([Input.y],
1066 [[%language "Java"
1067 %define public "maybe"
1068 %define parser_class_name "Input"
1069 %%
1070 start: ;
1071 ]])
1072
1073 AT_BISON_CHECK([[Input.y]], [1], [],
1074 [[Input.y:2.9-14: error: invalid value for %define Boolean variable 'public'
1075 ]])
1076
1077 AT_CLEANUP
1078
1079 ## ------------------------ ##
1080 ## %define enum variables.  ##
1081 ## ------------------------ ##
1082
1083 AT_SETUP([[%define enum variables]])
1084
1085 # Front-end.
1086 AT_DATA([[input.y]],
1087 [[%define lr.default-reductions bogus
1088 %%
1089 start: ;
1090 ]])
1091 AT_BISON_CHECK([[input.y]], [[1]], [[]],
1092 [[input.y:1.9-29: error: invalid value for %define variable 'lr.default-reductions': 'bogus'
1093 input.y:1.9-29:     accepted value: 'most'
1094 input.y:1.9-29:     accepted value: 'consistent'
1095 input.y:1.9-29:     accepted value: 'accepting'
1096 ]])
1097
1098 # Back-end.
1099 # FIXME: these should be indented, but we shouldn't mess with the m4 yet
1100 AT_DATA([[input.y]],
1101 [[%define api.push-pull neither
1102 %%
1103 start: ;
1104 ]])
1105 AT_BISON_CHECK([[input.y]], [1], [],
1106 [[input.y:1.9-21: error: invalid value for %define variable 'api.push-pull': 'neither'
1107 input.y:1.9-21: error: accepted value: 'pull'
1108 input.y:1.9-21: error: accepted value: 'push'
1109 input.y:1.9-21: error: accepted value: 'both'
1110 ]])
1111
1112 AT_CLEANUP
1113
1114 ## -------------------------------- ##
1115 ## %define backward compatibility.  ##
1116 ## -------------------------------- ##
1117
1118 AT_SETUP([[%define backward compatibility]])
1119
1120 # The error messages tell us whether underscores in these variables are
1121 # being converted to dashes.
1122
1123 AT_DATA([[input.y]],
1124 [[%define api.push_pull "neither"
1125 %%
1126 start: ;
1127 ]])
1128 AT_BISON_CHECK([[input.y]], [1], [],
1129 [[input.y:1.9-21: error: invalid value for %define variable 'api.push-pull': 'neither'
1130 input.y:1.9-21: error: accepted value: 'pull'
1131 input.y:1.9-21: error: accepted value: 'push'
1132 input.y:1.9-21: error: accepted value: 'both'
1133 ]])
1134
1135 AT_DATA([[input.y]],
1136 [[%define lr.keep_unreachable_states maybe
1137 %%
1138 start: ;
1139 ]])
1140 AT_BISON_CHECK([[input.y]], [1], [],
1141 [[input.y:1.9-34: error: invalid value for %define Boolean variable 'lr.keep-unreachable-states'
1142 ]])
1143
1144 AT_DATA([[input.y]],
1145 [[%define foo_bar "baz"
1146 %%
1147 start: ;
1148 ]])
1149 AT_BISON_CHECK([[input.y]], [[1]], [],
1150 [[input.y:1.9-15: error: %define variable 'foo_bar' is not used
1151 ]])
1152
1153 AT_CLEANUP
1154
1155 ## ------------------------- ##
1156 ## Unused %define api.pure.  ##
1157 ## ------------------------- ##
1158
1159 AT_SETUP([[Unused %define api.pure]])
1160
1161 # AT_CHECK_API_PURE(DECLS, VALUE)
1162 # -------------------------------
1163 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
1164 # are specified.
1165 m4_define([AT_CHECK_API_PURE],
1166 [
1167 AT_DATA([[input.y]],
1168 [[%define api.pure ]$2[
1169 ]$1[
1170 %%
1171 start: ;
1172 ]])
1173
1174 AT_BISON_CHECK([[input.y]], [[1]], [],
1175 [[input.y:1.9-16: error: %define variable 'api.pure' is not used
1176 ]])
1177 ])
1178
1179 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
1180 AT_CHECK_API_PURE([[%language "c++" %defines]], [[false]])
1181 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
1182 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[false]])
1183 AT_CHECK_API_PURE([[%language "java"]], [[true]])
1184 AT_CHECK_API_PURE([[%language "java"]], [[false]])
1185
1186 AT_CLEANUP
1187
1188 ## -------------------------------- ##
1189 ## C++ namespace reference errors.  ##
1190 ## -------------------------------- ##
1191
1192 AT_SETUP([[C++ namespace reference errors]])
1193
1194 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
1195 # -------------------------------------------------------------
1196 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
1197 m4_define([AT_CHECK_NAMESPACE_ERROR],
1198 [
1199 AT_DATA([[input.y]],
1200 [[%language "C++"
1201 %defines
1202 %define namespace "]$1["
1203 %%
1204 start: ;
1205 ]])
1206
1207 AT_BISON_CHECK([[input.y]], [1], [],
1208 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
1209 [[input.y:3.9-17: error: ]b4_arg[
1210 ]])])
1211 ])
1212
1213 AT_CHECK_NAMESPACE_ERROR([[]],
1214                          [[namespace reference is empty]])
1215 AT_CHECK_NAMESPACE_ERROR([[                             ]],
1216                          [[namespace reference is empty]])
1217 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
1218                          [[namespace reference has consecutive "::"]])
1219 AT_CHECK_NAMESPACE_ERROR([[foo::        ::bar]],
1220                          [[namespace reference has consecutive "::"]])
1221 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
1222                          [[namespace reference has consecutive "::"]])
1223 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
1224                          [[namespace reference has consecutive "::"]])
1225 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ::]],
1226                          [[namespace reference has consecutive "::"]],
1227                          [[namespace reference has a trailing "::"]])
1228 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
1229                          [[namespace reference has a trailing "::"]])
1230 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ]],
1231                          [[namespace reference has a trailing "::"]])
1232 AT_CHECK_NAMESPACE_ERROR([[::]],
1233                          [[namespace reference has a trailing "::"]])
1234
1235 AT_CLEANUP
1236
1237 ## ------------------------ ##
1238 ## Bad character literals.  ##
1239 ## ------------------------ ##
1240
1241 # Bison used to accept character literals that were empty or contained
1242 # too many characters.
1243
1244 # FIXME: AT_DATA or some variant of AT_DATA may eventually permit
1245 # the final newline to be omitted.  See the threads starting at
1246 # <http://lists.gnu.org/archive/html/bison-patches/2009-07/msg00019.html>.
1247
1248 AT_SETUP([[Bad character literals]])
1249
1250 AT_DATA([empty.y],
1251 [[%%
1252 start: '';
1253 start: '
1254 ]])
1255 AT_CHECK([[$PERL -e "print 'start: \'';" >> empty.y || exit 77]])
1256
1257 AT_BISON_CHECK([empty.y], [1], [],
1258 [[empty.y:2.8-9: warning: empty character literal
1259 empty.y:3.8-4.0: warning: empty character literal
1260 empty.y:3.8-4.0: error: missing "'" at end of line
1261 empty.y:4.8: warning: empty character literal
1262 empty.y:4.8: error: missing "'" at end of file
1263 ]])
1264
1265 AT_DATA([two.y],
1266 [[%%
1267 start: 'ab';
1268 start: 'ab
1269 ]])
1270 AT_CHECK([[$PERL -e "print 'start: \'ab';" >> two.y || exit 77]])
1271
1272 AT_BISON_CHECK([two.y], [1], [],
1273 [[two.y:2.8-11: warning: extra characters in character literal
1274 two.y:3.8-4.0: warning: extra characters in character literal
1275 two.y:3.8-4.0: error: missing "'" at end of line
1276 two.y:4.8-10: warning: extra characters in character literal
1277 two.y:4.8-10: error: missing "'" at end of file
1278 ]])
1279
1280 AT_DATA([three.y],
1281 [[%%
1282 start: 'abc';
1283 start: 'abc
1284 ]])
1285 AT_CHECK([[$PERL -e "print 'start: \'abc';" >> three.y || exit 77]])
1286
1287 AT_BISON_CHECK([three.y], [1], [],
1288 [[three.y:2.8-12: warning: extra characters in character literal
1289 three.y:3.8-4.0: warning: extra characters in character literal
1290 three.y:3.8-4.0: error: missing "'" at end of line
1291 three.y:4.8-11: warning: extra characters in character literal
1292 three.y:4.8-11: error: missing "'" at end of file
1293 ]])
1294
1295 AT_CLEANUP
1296
1297 ## ------------------------- ##
1298 ## Bad escapes in literals.  ##
1299 ## ------------------------- ##
1300
1301 AT_SETUP([[Bad escapes in literals]])
1302
1303 AT_DATA([input.y],
1304 [[%%
1305 start: '\777' '\0' '\xfff' '\x0'
1306        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
1307        '\ ' '\A';
1308 ]])
1309
1310 # It is not easy to create special characters, we cannot even trust tr.
1311 # Beside we cannot even expect "echo '\0'" to output two characters
1312 # (well three with \n): at least Bash 3.2 converts the two-character
1313 # sequence "\0" into a single NUL character.
1314 AT_CHECK([[$PERL -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
1315            || exit 77]])
1316
1317 AT_BISON_CHECK([input.y], [1], [],
1318 [[input.y:2.9-12: error: invalid number after \-escape: 777
1319 input.y:2.8-13: warning: empty character literal
1320 input.y:2.16-17: error: invalid number after \-escape: 0
1321 input.y:2.15-18: warning: empty character literal
1322 input.y:2.21-25: error: invalid number after \-escape: xfff
1323 input.y:2.20-26: warning: empty character literal
1324 input.y:2.29-31: error: invalid number after \-escape: x0
1325 input.y:2.28-32: warning: empty character literal
1326 input.y:3.9-14: error: invalid number after \-escape: uffff
1327 input.y:3.8-15: warning: empty character literal
1328 input.y:3.18-23: error: invalid number after \-escape: u0000
1329 input.y:3.17-24: warning: empty character literal
1330 input.y:3.27-36: error: invalid number after \-escape: Uffffffff
1331 input.y:3.26-37: warning: empty character literal
1332 input.y:3.40-49: error: invalid number after \-escape: U00000000
1333 input.y:3.39-50: warning: empty character literal
1334 input.y:4.9-10: error: invalid character after \-escape: ' '
1335 input.y:4.8-11: warning: empty character literal
1336 input.y:4.14-15: error: invalid character after \-escape: A
1337 input.y:4.13-16: warning: empty character literal
1338 input.y:5.9-16: error: invalid character after \-escape: \t
1339 input.y:5.17: error: invalid character after \-escape: \f
1340 input.y:5.18: error: invalid character after \-escape: \0
1341 input.y:5.19: error: invalid character after \-escape: \001
1342 ]])
1343
1344 AT_CLEANUP
1345
1346 ## ------------------------- ##
1347 ## LAC: Errors for %define.  ##
1348 ## ------------------------- ##
1349
1350 AT_SETUP([[LAC: Errors for %define]])
1351
1352 AT_DATA([[input.y]],
1353 [[%%
1354 start: ;
1355 ]])
1356
1357 # parse.lac.* options are useless if LAC isn't actually activated.
1358 AT_BISON_CHECK([[-Dparse.lac.es-capacity-initial=1 input.y]],
1359                [[1]], [],
1360 [[<command line>:1: error: %define variable 'parse.lac.es-capacity-initial' is not used
1361 ]])
1362 AT_BISON_CHECK([[-Dparse.lac.memory-trace=full input.y]],
1363                [[1]], [],
1364 [[<command line>:1: error: %define variable 'parse.lac.memory-trace' is not used
1365 ]])
1366
1367 AT_CLEANUP
1368
1369 ## --------------------------------------------- ##
1370 ## -Werror is not affected by -Wnone and -Wall.  ##
1371 ## --------------------------------------------- ##
1372
1373 AT_SETUP([[-Werror is not affected by -Wnone and -Wall]])
1374
1375 AT_DATA([[input.y]],
1376 [[%%
1377 foo-bar: ;
1378 ]])
1379
1380 # -Werror is not enabled by -Wall or equivalent.
1381 AT_BISON_CHECK([[-Wall input.y]], [[0]], [[]],
1382 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
1383 ]])
1384 AT_BISON_CHECK([[-W input.y]], [[0]], [[]],
1385 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
1386 ]])
1387 AT_BISON_CHECK([[-Wno-none input.y]], [[0]], [[]],
1388 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
1389 ]])
1390
1391 # -Werror is not disabled by -Wnone or equivalent.
1392 AT_BISON_CHECK([[-Werror,none,yacc input.y]], [[1]], [[]], [[stderr]])
1393 AT_CHECK([[sed 's/^.*bison:/bison:/' stderr]], [[0]],
1394 [[bison: warnings being treated as errors
1395 input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
1396 ]])
1397 [mv stderr experr]
1398 AT_BISON_CHECK([[-Werror,no-all,yacc input.y]], [[1]], [[]], [[experr]])
1399
1400 AT_CLEANUP
1401
1402
1403 ## ------------------------------------------------------ ##
1404 ## %name-prefix and %define api.prefix are incompatible.  ##
1405 ## ------------------------------------------------------ ##
1406
1407 AT_SETUP([[%name-prefix and %define api.prefix are incompatible]])
1408
1409 # AT_TEST(DIRECTIVES, OPTIONS, ERROR-LOCATION)
1410 # --------------------------------------------
1411 m4_pushdef([AT_TEST],
1412 [AT_DATA([[input.y]],
1413 [[$1
1414 %%
1415 exp:;
1416 ]])
1417 AT_BISON_CHECK([[$2 input.y]], [[1]], [[]],
1418 [[$3: error: '%name-prefix' and '%define api.prefix' cannot be used together
1419 ]])
1420 ])
1421
1422 AT_TEST([%define api.prefix foo %name-prefix "bar"], [], [input.y:1.9-18])
1423 AT_TEST([], [-Dapi.prefix=foo -p bar], [<command line>:1])
1424 AT_TEST([%name-prefix "bar"], [-Dapi.prefix=foo], [<command line>:1])
1425 AT_TEST([%define api.prefix foo], [-p bar], [input.y:1.9-18])
1426
1427 m4_popdef([AT_TEST])
1428
1429 AT_CLEANUP
1430
1431
1432 ## -------------- ##
1433 ## Stray $ or @.  ##
1434 ## -------------- ##
1435
1436 AT_SETUP([[Stray $ or @]])
1437
1438 # Give %printer and %destructor "<*> exp TOK" instead of "<*>" to
1439 # check that the warnings are reported once, not three times.
1440
1441 AT_DATA_GRAMMAR([[input.y]],
1442 [[%token TOK
1443 %destructor     { $%; @%; } <*> exp TOK;
1444 %initial-action { $%; @%; };
1445 %printer        { $%; @%; } <*> exp TOK;
1446 %%
1447 exp: TOK        { $%; @%; $$ = $1; };
1448 ]])
1449
1450 AT_BISON_CHECK([[input.y]], 0, [],
1451 [[input.y:10.19: warning: stray '$'
1452 input.y:10.23: warning: stray '@'
1453 input.y:11.19: warning: stray '$'
1454 input.y:11.23: warning: stray '@'
1455 input.y:12.19: warning: stray '$'
1456 input.y:12.23: warning: stray '@'
1457 input.y:14.19: warning: stray '$'
1458 input.y:14.23: warning: stray '@'
1459 ]])
1460
1461 AT_CLEANUP
1462
1463
1464
1465 ## ---------------- ##
1466 ## Code injection.  ##
1467 ## ---------------- ##
1468
1469
1470 AT_SETUP([[Code injection]])
1471
1472 m4_pattern_allow([^m4_errprintn$])
1473
1474 # AT_TEST([MACRO])
1475 # ----------------
1476 # Try to have MACRO be run by bison.
1477 m4_pushdef([AT_TEST],
1478 [AT_DATA([[input.y]],
1479 [[%type <$1(DEAD %type)> exp
1480 %token <$1(DEAD %token)> a
1481 %initial-action
1482 {
1483   $$;
1484   $<$1(DEAD %initial-action)>$
1485 };
1486 %printer
1487 {
1488   $$
1489   $<$1(DEAD %printer)>$
1490 } <> <*>;
1491 %lex-param
1492 {
1493   $1(DEAD %lex-param)
1494 };
1495 %parse-param
1496 {
1497   $1(DEAD %parse-param)
1498 };
1499 %%
1500 exp:
1501   a a[last]
1502   {
1503     $$;
1504     $][1;
1505     $<$1(DEAD action 1)>$
1506     $<$1(DEAD action 2)>1
1507     $<$1(DEAD action 3)>last
1508     $<$1(DEAD action 4)>0
1509     ;
1510   };
1511 ]])
1512
1513 # FIXME: Provide a means to iterate over all the skeletons.
1514 AT_BISON_CHECK([[-d               input.y]])
1515 AT_BISON_CHECK([[-d -S glr.c      input.y]])
1516 AT_BISON_CHECK([[-d -S lalr1.cc   input.y]])
1517 AT_BISON_CHECK([[-d -S glr.cc     input.y]])
1518 AT_BISON_CHECK([[   -S lalr1.java input.y]])
1519 ])
1520
1521 AT_TEST([m4_errprintn])
1522 AT_TEST([@:>@m4_errprintn])
1523
1524 m4_popdef([AT_TEST])
1525
1526 AT_CLEANUP