tests/input.at

   1 # Checking the Bison scanner.                    -*- Autotest -*-
   2 # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   3 # Free Software Foundation, Inc.
   4
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 AT_BANNER([[Input Processing.]])
  19
  20 # Mostly test that we are robust to mistakes.
  21
  22
  23 ## ------------ ##
  24 ## Invalid $n.  ##
  25 ## ------------ ##
  26
  27 AT_SETUP([Invalid $n and @n])
  28
  29 AT_DATA([input.y],
  30 [[%%
  31 exp: { $$ = $1 ; };
  32 exp: { @$ = @1 ; };
  33 ]])
  34
  35 AT_BISON_CHECK([input.y], [1], [],
  36 [[input.y:2.13-14: integer out of range: `$1'
  37 input.y:3.13-14: integer out of range: `@1'
  38 ]])
  39
  40 AT_CLEANUP
  41
  42
  43 ## -------------- ##
  44 ## Type Clashes.  ##
  45 ## -------------- ##
  46
  47 AT_SETUP([Type Clashes])
  48
  49 AT_DATA([input.y],
  50 [[%union { int bar; }
  51 %token foo
  52 %type <bar> exp
  53 %%
  54 exp: foo { $$; } foo { $2; } foo
  55    | foo
  56    | /* Empty. */
  57    ;
  58 ]])
  59
  60 AT_BISON_CHECK([input.y], [1], [],
  61 [[input.y:5.12-13: $$ for the midrule at $2 of `exp' has no declared type
  62 input.y:5.24-25: $2 of `exp' has no declared type
  63 input.y:5.6-32: warning: type clash on default action: <bar> != <>
  64 input.y:6.6-8: warning: type clash on default action: <bar> != <>
  65 input.y:7.5: warning: empty rule for typed nonterminal, and no action
  66 ]])
  67
  68 AT_CLEANUP
  69
  70
  71 # _AT_UNUSED_VALUES_DECLARATIONS()
  72 # --------------------------------------------
  73 # Generate the token, type, and destructor
  74 # declarations for the unused values tests.
  75
  76 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
  77 [[[%token <integer> INT;
  78 %type <integer> a b c d e f g h i j k l;
  79 %destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
  80
  81
  82 # AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER, CHECK_MIDRULE_VALUES)
  83 # ------------------------------------------------------------------
  84 # Generate a grammar to test unused values,
  85 # compile it, run it.  If DECLARATIONS_AFTER
  86 # is set, then the token, type, and destructor
  87 # declarations are generated after the rules
  88 # rather than before.  If CHECK_MIDRULE_VALUES
  89 # is set, then --warnings=midrule-values is
  90 # set.
  91
  92 m4_define([AT_CHECK_UNUSED_VALUES],
  93 [AT_DATA([input.y],
  94 m4_ifval($1, [
  95
  96
  97 ], [_AT_UNUSED_VALUES_DECLARATIONS
  98 ])[[%%
  99 start:
 100   'a' a { $]2[; } | 'b' b { $]2[; } | 'c' c { $]2[; } | 'd' d { $]2[; }
 101 | 'e' e { $]2[; } | 'f' f { $]2[; } | 'g' g { $]2[; } | 'h' h { $]2[; }
 102 | 'i' i { $]2[; } | 'j' j { $]2[; } | 'k' k { $]2[; } | 'l' l { $]2[; }
 103 ;
 104
 105 a: INT | INT { } INT { } INT { };
 106 b: INT | /* empty */;
 107 c: INT | INT { $]1[; } INT { $<integer>2; } INT { $<integer>4; };
 108 d: INT | INT { } INT { $]1[; } INT { $<integer>2; };
 109 e: INT | INT { } INT {  } INT { $]1[; };
 110 f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
 111 g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
 112 h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
 113 i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
 114 j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
 115 k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
 116 l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
 117 _AT_UNUSED_VALUES_DECLARATIONS])
 118 )
 119
 120 AT_BISON_CHECK(m4_ifval($2, [ --warnings=midrule-values ])[ input.y], [0], [],
 121 [[input.y:11.10-32: warning: unset value: $]$[
 122 input.y:11.10-32: warning: unused value: $]1[
 123 input.y:11.10-32: warning: unused value: $]3[
 124 input.y:11.10-32: warning: unused value: $]5[
 125 input.y:12.9: warning: empty rule for typed nonterminal, and no action
 126 ]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $$
 127 input.y:13.26-41: warning: unset value: $$
 128 ]]])[[input.y:13.10-62: warning: unset value: $]$[
 129 input.y:13.10-62: warning: unused value: $]3[
 130 input.y:13.10-62: warning: unused value: $]5[
 131 ]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
 132 ]]])[[input.y:14.10-49: warning: unset value: $]$[
 133 input.y:14.10-49: warning: unused value: $]3[
 134 input.y:14.10-49: warning: unused value: $]5[
 135 input.y:15.10-37: warning: unset value: $]$[
 136 input.y:15.10-37: warning: unused value: $]3[
 137 input.y:15.10-37: warning: unused value: $]5[
 138 input.y:17.10-58: warning: unset value: $]$[
 139 input.y:17.10-58: warning: unused value: $]1[
 140 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
 141 ]]])[[input.y:17.10-58: warning: unused value: $]3[
 142 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[
 143 ]]])[[input.y:17.10-58: warning: unused value: $]5[
 144 input.y:18.10-72: warning: unset value: $]$[
 145 input.y:18.10-72: warning: unused value: $]1[
 146 input.y:18.10-72: warning: unused value: $]3[
 147 ]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
 148 ]]])[[input.y:18.10-72: warning: unused value: $]5[
 149 ]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[
 150 ]]])[[input.y:21.10-68: warning: unset value: $]$[
 151 input.y:21.10-68: warning: unused value: $]1[
 152 input.y:21.10-68: warning: unused value: $]2[
 153 ]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
 154 ]]]))])
 155
 156
 157 ## --------------- ##
 158 ## Unused values.  ##
 159 ## --------------- ##
 160
 161 AT_SETUP([Unused values])
 162 AT_CHECK_UNUSED_VALUES
 163 AT_CHECK_UNUSED_VALUES(, [1])
 164 AT_CLEANUP
 165
 166
 167 ## ------------------------------------------ ##
 168 ## Unused values before symbol declarations.  ##
 169 ## ------------------------------------------ ##
 170
 171 AT_SETUP([Unused values before symbol declarations])
 172 AT_CHECK_UNUSED_VALUES([1])
 173 AT_CHECK_UNUSED_VALUES([1], [1])
 174 AT_CLEANUP
 175
 176
 177 ## --------------------------------------------- ##
 178 ## Default %printer and %destructor redeclared.  ##
 179 ## --------------------------------------------- ##
 180
 181 AT_SETUP([Default %printer and %destructor redeclared])
 182
 183 AT_DATA([[input.y]],
 184 [[%destructor { destroy ($$); } <*> <*>
 185 %printer { destroy ($$); } <*> <*>
 186
 187 %destructor { destroy ($$); } <*>
 188 %printer { destroy ($$); } <*>
 189
 190 %destructor { destroy ($$); } <> <>
 191 %printer { destroy ($$); } <> <>
 192
 193 %destructor { destroy ($$); } <>
 194 %printer { destroy ($$); } <>
 195
 196 %%
 197
 198 start: ;
 199
 200 %destructor { destroy ($$); } <*>;
 201 %printer { destroy ($$); } <*>;
 202
 203 %destructor { destroy ($$); } <>;
 204 %printer { destroy ($$); } <>;
 205 ]])
 206
 207 AT_BISON_CHECK([input.y], [1], [],
 208 [[input.y:1.13-29: redeclaration for default tagged %destructor
 209 input.y:1.13-29: previous declaration
 210 input.y:2.10-26: redeclaration for default tagged %printer
 211 input.y:2.10-26: previous declaration
 212 input.y:4.13-29: redeclaration for default tagged %destructor
 213 input.y:1.13-29: previous declaration
 214 input.y:5.10-26: redeclaration for default tagged %printer
 215 input.y:2.10-26: previous declaration
 216 input.y:7.13-29: redeclaration for default tagless %destructor
 217 input.y:7.13-29: previous declaration
 218 input.y:8.10-26: redeclaration for default tagless %printer
 219 input.y:8.10-26: previous declaration
 220 input.y:10.13-29: redeclaration for default tagless %destructor
 221 input.y:7.13-29: previous declaration
 222 input.y:11.10-26: redeclaration for default tagless %printer
 223 input.y:8.10-26: previous declaration
 224 input.y:17.13-29: redeclaration for default tagged %destructor
 225 input.y:4.13-29: previous declaration
 226 input.y:18.10-26: redeclaration for default tagged %printer
 227 input.y:5.10-26: previous declaration
 228 input.y:20.13-29: redeclaration for default tagless %destructor
 229 input.y:10.13-29: previous declaration
 230 input.y:21.10-26: redeclaration for default tagless %printer
 231 input.y:11.10-26: previous declaration
 232 ]])
 233
 234 AT_CLEANUP
 235
 236
 237 ## ---------------------------------------------- ##
 238 ## Per-type %printer and %destructor redeclared.  ##
 239 ## ---------------------------------------------- ##
 240
 241 AT_SETUP([Per-type %printer and %destructor redeclared])
 242
 243 AT_DATA([[input.y]],
 244 [[%destructor { destroy ($$); } <field1> <field2>
 245 %printer { destroy ($$); } <field1> <field2>
 246
 247 %destructor { destroy ($$); } <field1> <field1>
 248 %printer { destroy ($$); } <field2> <field2>
 249
 250 %%
 251
 252 start: ;
 253
 254 %destructor { destroy ($$); } <field2> <field1>;
 255 %printer { destroy ($$); } <field2> <field1>;
 256 ]])
 257
 258 AT_BISON_CHECK([input.y], [1], [],
 259 [[input.y:4.13-29: %destructor redeclaration for <field1>
 260 input.y:1.13-29: previous declaration
 261 input.y:4.13-29: %destructor redeclaration for <field1>
 262 input.y:4.13-29: previous declaration
 263 input.y:5.10-26: %printer redeclaration for <field2>
 264 input.y:2.10-26: previous declaration
 265 input.y:5.10-26: %printer redeclaration for <field2>
 266 input.y:5.10-26: previous declaration
 267 input.y:11.13-29: %destructor redeclaration for <field1>
 268 input.y:4.13-29: previous declaration
 269 input.y:11.13-29: %destructor redeclaration for <field2>
 270 input.y:1.13-29: previous declaration
 271 input.y:12.10-26: %printer redeclaration for <field1>
 272 input.y:2.10-26: previous declaration
 273 input.y:12.10-26: %printer redeclaration for <field2>
 274 input.y:5.10-26: previous declaration
 275 ]])
 276
 277 AT_CLEANUP
 278
 279
 280 ## ---------------------------------------- ##
 281 ## Unused values with default %destructor.  ##
 282 ## ---------------------------------------- ##
 283
 284 AT_SETUP([Unused values with default %destructor])
 285
 286 AT_DATA([[input.y]],
 287 [[%destructor { destroy ($$); } <>
 288 %type <tag> tagged
 289
 290 %%
 291
 292 start: end end tagged tagged { $<tag>1; $3; } ;
 293 end: { } ;
 294 tagged: { } ;
 295 ]])
 296
 297 AT_BISON_CHECK([input.y], [0], [],
 298 [[input.y:6.8-45: warning: unset value: $$
 299 input.y:6.8-45: warning: unused value: $2
 300 input.y:7.6-8: warning: unset value: $$
 301 ]])
 302
 303 AT_DATA([[input.y]],
 304 [[%destructor { destroy ($$); } <*>
 305 %type <tag> tagged
 306
 307 %%
 308
 309 start: end end tagged tagged { $<tag>1; $3; } ;
 310 end: { } ;
 311 tagged: { } ;
 312 ]])
 313
 314 AT_BISON_CHECK([input.y], [0], [],
 315 [[input.y:6.8-45: warning: unused value: $4
 316 input.y:8.9-11: warning: unset value: $$
 317 ]])
 318
 319 AT_CLEANUP
 320
 321
 322 ## ----------------------------------------- ##
 323 ## Unused values with per-type %destructor.  ##
 324 ## ----------------------------------------- ##
 325
 326 AT_SETUP([Unused values with per-type %destructor])
 327
 328 AT_DATA([[input.y]],
 329 [[%destructor { destroy ($$); } <field1>
 330 %type <field1> start end
 331
 332 %%
 333
 334 start: end end { $1; } ;
 335 end: { }  ;
 336 ]])
 337
 338 AT_BISON_CHECK([input.y], [0], [],
 339 [[input.y:6.8-22: warning: unset value: $$
 340 input.y:6.8-22: warning: unused value: $2
 341 input.y:7.6-8: warning: unset value: $$
 342 ]])
 343
 344 AT_CLEANUP
 345
 346
 347 ## ---------------------- ##
 348 ## Incompatible Aliases.  ##
 349 ## ---------------------- ##
 350
 351 AT_SETUP([Incompatible Aliases])
 352
 353 AT_DATA([input.y],
 354 [[%token foo "foo"
 355
 356 %type <bar>       foo
 357 %printer {bar}    foo
 358 %destructor {bar} foo
 359 %left             foo
 360
 361 %type <baz>       "foo"
 362 %printer {baz}    "foo"
 363 %destructor {baz} "foo"
 364 %left             "foo"
 365
 366 %%
 367 exp: foo;
 368 ]])
 369
 370 AT_BISON_CHECK([input.y], [1], [],
 371 [[input.y:8.7-11: %type redeclaration for foo
 372 input.y:3.7-11: previous declaration
 373 input.y:10.13-17: %destructor redeclaration for foo
 374 input.y:5.13-17: previous declaration
 375 input.y:9.10-14: %printer redeclaration for foo
 376 input.y:4.10-14: previous declaration
 377 input.y:11.1-5: %left redeclaration for foo
 378 input.y:6.1-5: previous declaration
 379 ]])
 380
 381 AT_CLEANUP
 382
 383
 384
 385 ## ----------------------- ##
 386 ## Torturing the Scanner.  ##
 387 ## ----------------------- ##
 388
 389 # Be sure to compile and run, so that the C compiler checks what
 390 # we do.
 391
 392 AT_SETUP([Torturing the Scanner])
 393
 394
 395 AT_DATA([input.y], [])
 396 AT_BISON_CHECK([input.y], [1], [],
 397 [[input.y:1.1: syntax error, unexpected end of file
 398 ]])
 399
 400
 401 AT_DATA([input.y],
 402 [{}
 403 ])
 404 AT_BISON_CHECK([input.y], [1], [],
 405 [[input.y:1.1-2: syntax error, unexpected {...}
 406 ]])
 407
 408
 409 AT_DATA_GRAMMAR([input.y],
 410 [[%{
 411 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 412 const char *foo = "So %{ and %} can be here too.";
 413
 414 #if 0
 415 /* These examples test Bison while not stressing C compilers too much.
 416    Many C compilers mishandle backslash-newlines, so this part of the
 417    test is inside "#if 0".  The comment and string are written so that
 418    the "#endif" will be seen regardless of the C compiler bugs that we
 419    know about, namely:
 420
 421      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 422      comment.
 423
 424      The Apple Darwin compiler (as of late 2002) mishandles
 425      \\[newline]' within a character constant.
 426
 427    */
 428
 429 /\
 430 * A comment with backslash-newlines in it. %} *\
 431 \
 432 /
 433 /* { Close the above comment, if the C compiler mishandled it.  */
 434
 435 char str[] = "\\
 436 " A string with backslash-newlines in it %{ %} \\
 437 \
 438 "";
 439
 440 char apostrophe = '\'';
 441 #endif
 442
 443 #include <stdio.h>
 444 #include <stdlib.h>
 445 %}
 446 /* %{ and %} can be here too. */
 447
 448 %{
 449 /* Exercise pre-prologue dependency to %union.  */
 450 typedef int value;
 451 %}
 452
 453 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 454
 455 /* Also exercise %union. */
 456 %union
 457 {
 458   value ival; /* A comment to exercise an old bug. */
 459 };
 460
 461
 462 /* Exercise post-prologue dependency to %union.  */
 463 %{
 464 static YYSTYPE value_as_yystype (value val);
 465
 466 /* Exercise quotes in declarations.  */
 467 char quote[] = "@:>@@:>@,";
 468 %}
 469
 470 %{
 471 static void yyerror (const char *s);
 472 static int yylex (void);
 473 %}
 474
 475 %type <ival> '@<:@'
 476
 477 /* Exercise quotes in strings.  */
 478 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 479
 480 %%
 481 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 482 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 483   {
 484     /* Exercise quotes in braces.  */
 485     char tmp[] = "@<:@%c@:>@,\n";
 486     printf (tmp, $1);
 487   }
 488 ;
 489
 490 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 491 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 492 output.or.oline.opt: ;|oline;;|output;;;
 493 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 494 %%
 495 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 496
 497 static YYSTYPE
 498 value_as_yystype (value val)
 499 {
 500   YYSTYPE res;
 501   res.ival = val;
 502   return res;
 503 }
 504
 505 static int
 506 yylex (void)
 507 {
 508   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
 509 #output "; /* "
 510   */
 511   static size_t toknum;
 512   if (! (toknum < sizeof input))
 513     abort ();
 514   yylval = value_as_yystype (input[toknum]);
 515   return input[toknum++];
 516 }
 517
 518 static void
 519 yyerror (const char *msg)
 520 {
 521   fprintf (stderr, "%s\n", msg);
 522 }
 523 ]])
 524
 525 # Pacify Emacs'font-lock-mode: "
 526
 527 AT_DATA([main.c],
 528 [[typedef int value;
 529 #include "input.h"
 530
 531 int yyparse (void);
 532
 533 int
 534 main (void)
 535 {
 536   return yyparse ();
 537 }
 538 ]])
 539
 540 AT_BISON_CHECK([-d -v -o input.c input.y])
 541 AT_COMPILE([input.o], [-c input.c])
 542 AT_COMPILE([main.o], [-c main.c])
 543 AT_COMPILE([input], [input.o main.o])
 544 AT_PARSER_CHECK([./input], 0,
 545 [[[@<:@],
 546 ]])
 547
 548 AT_CLEANUP
 549
 550
 551 ## ---------------------- ##
 552 ## Typed symbol aliases.  ##
 553 ## ---------------------- ##
 554
 555 AT_SETUP([Typed symbol aliases])
 556
 557 # Bison 2.0 broke typed symbol aliases - ensure they work.
 558
 559 AT_DATA_GRAMMAR([input.y],
 560 [[%union
 561 {
 562   int val;
 563 };
 564 %token <val> MY_TOKEN "MY TOKEN"
 565 %type <val> exp
 566 %%
 567 exp: "MY TOKEN";
 568 %%
 569 ]])
 570
 571 AT_BISON_CHECK([-o input.c input.y])
 572
 573 AT_CLEANUP
 574
 575
 576 ## --------- ##
 577 ## Require.  ##
 578 ## --------- ##
 579
 580 m4_define([AT_CHECK_REQUIRE],
 581 [AT_SETUP([Require $1])
 582 AT_DATA_GRAMMAR([input.y],
 583 [[%require "$1";
 584 %%
 585 empty_file:;
 586 ]])
 587 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
 588 AT_CLEANUP
 589 ])
 590
 591 AT_CHECK_REQUIRE(1.0, 0)
 592 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 593 ## FIXME: Some day augment this version number.
 594 AT_CHECK_REQUIRE(100.0, 63)
 595
 596
 597 ## ------------------------------------- ##
 598 ## String aliases for character tokens.  ##
 599 ## ------------------------------------- ##
 600
 601 AT_SETUP([String aliases for character tokens])
 602
 603 # Bison once thought a character token and its alias were different symbols
 604 # with the same user token number.
 605
 606 AT_DATA_GRAMMAR([input.y],
 607 [[%token 'a' "a"
 608 %%
 609 start: 'a';
 610 %%
 611 ]])
 612
 613 AT_BISON_CHECK([-o input.c input.y])
 614
 615 AT_CLEANUP
 616
 617
 618 ## -------------- ##
 619 ## Symbol names.  ##
 620 ## -------------- ##
 621
 622 AT_SETUP([Symbols])
 623
 624 AT_DATA_GRAMMAR([input.y],
 625 [[%token WITH-DASH
 626 %token WITHOUT_DASH "WITHOUT-DASH"
 627 %token WITH.PERIOD
 628 %token WITHOUT_PERIOD "WITHOUT.PERIOD"
 629 %code {
 630   void yyerror (char const *);
 631   int yylex (void);
 632 }
 633 %%
 634 start: with-dash without_dash with.period without_period;
 635 with-dash: WITH-DASH;
 636 without_dash: "WITHOUT-DASH";
 637 with.period: WITH.PERIOD;
 638 without_period: "WITHOUT.PERIOD";
 639 %%
 640 ]])
 641
 642 # POSIX Yacc accept periods, but not dashes.
 643 AT_BISON_CHECK([--yacc input.y], [1], [],
 644 [[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 645 input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
 646 ]])
 647
 648 # So warn about them.
 649 AT_BISON_CHECK([-Wyacc input.y], [], [],
 650 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 651 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
 652 ]])
 653
 654 # Dashes are fine for GNU Bison.
 655 AT_BISON_CHECK([-o input.c input.y])
 656
 657 # Make sure we don't export silly token identifiers with periods or dashes.
 658 AT_COMPILE([input.o], [-c input.c])
 659
 660
 661 # Periods and dashes are genuine letters, they can start identifiers.
 662 # Digits cannot.
 663 AT_DATA_GRAMMAR([input.y],
 664 [[%token .GOOD
 665          -GOOD
 666          1NV4L1D
 667 %%
 668 start: .GOOD -GOOD
 669 ]])
 670 AT_BISON_CHECK([-o input.c input.y], [1], [],
 671 [[input.y:11.10-16: invalid identifier: `1NV4L1D'
 672 ]])
 673
 674 AT_CLEANUP
 675
 676
 677 ## ----------------- ##
 678 ## Numbered tokens.  ##
 679 ## ----------------- ##
 680
 681 AT_SETUP([Numbered tokens])
 682
 683 AT_DATA_GRAMMAR([redecl.y],
 684 [[%token DECIMAL_1     11259375
 685          HEXADECIMAL_1 0xabcdef
 686          HEXADECIMAL_2 0xFEDCBA
 687          DECIMAL_2     16702650
 688 %%
 689 start: DECIMAL_1 HEXADECIMAL_2;
 690 ]])
 691
 692 AT_BISON_CHECK([redecl.y], [1], [],
 693 [[redecl.y:10.10-22: user token number 11259375 redeclaration for HEXADECIMAL_1
 694 redecl.y:9.8-16: previous declaration for DECIMAL_1
 695 redecl.y:12.10-18: user token number 16702650 redeclaration for DECIMAL_2
 696 redecl.y:11.10-22: previous declaration for HEXADECIMAL_2
 697 ]])
 698
 699 AT_DATA_GRAMMAR([too-large.y],
 700 [[%token TOO_LARGE_DEC 999999999999999999999
 701          TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
 702 %%
 703 start: TOO_LARGE_DEC TOO_LARGE_HEX
 704 %%
 705 ]])
 706
 707 AT_BISON_CHECK([too-large.y], [1], [],
 708 [[too-large.y:9.22-42: integer out of range: `999999999999999999999'
 709 too-large.y:10.24-44: integer out of range: `0xFFFFFFFFFFFFFFFFFFF'
 710 ]])
 711
 712 AT_CLEANUP
 713
 714
 715 ## --------------------- ##
 716 ## Unclosed constructs.  ##
 717 ## --------------------- ##
 718
 719 AT_SETUP([Unclosed constructs])
 720
 721 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
 722 # they were prepended to whatever it STRING_GROW'ed next.  It also threw them
 723 # away rather than returning them to the parser.  The effect was confusing
 724 # subsequent error messages.
 725
 726 AT_DATA([input.y],
 727 [[%token A "a
 728 %token B "b"
 729 %token AB "ab" // Used to complain that "ab" was already used.
 730 %token C '1
 731 %token TWO "2"
 732 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
 733
 734 %%
 735
 736 start: ;
 737
 738 // Used to report a syntax error because it didn't see any kind of symbol
 739 // identifier.
 740 %type <f> 'a
 741 ;
 742 %type <f> "a
 743 ;
 744 // Used to report a syntax error because it didn't see braced code.
 745 %destructor { free ($$)
 746 ]])
 747
 748 AT_BISON_CHECK([-o input.c input.y], 1, [],
 749 [[input.y:1.10-2.0: missing `"' at end of line
 750 input.y:4.10-5.0: missing `'' at end of line
 751 input.y:14.11-15.0: missing `'' at end of line
 752 input.y:16.11-17.0: missing `"' at end of line
 753 input.y:19.13-20.0: missing `}' at end of file
 754 input.y:20.1: syntax error, unexpected end of file
 755 ]])
 756
 757 AT_CLEANUP
 758
 759
 760 ## ------------------------- ##
 761 ## %start after first rule.  ##
 762 ## ------------------------- ##
 763
 764 AT_SETUP([%start after first rule])
 765
 766 # Bison once complained that a %start after the first rule was a redeclaration
 767 # of the start symbol.
 768
 769 AT_DATA([input.y],
 770 [[%%
 771 false_start: ;
 772 start: false_start ;
 773 %start start;
 774 ]])
 775
 776 AT_BISON_CHECK([-o input.c input.y])
 777
 778 AT_CLEANUP
 779
 780
 781 ## --------------------- ##
 782 ## %prec takes a token.  ##
 783 ## --------------------- ##
 784
 785 AT_SETUP([%prec takes a token])
 786
 787 # Bison once allowed %prec sym where sym was a nonterminal.
 788
 789 AT_DATA([input.y],
 790 [[%%
 791 start: PREC %prec PREC ;
 792 PREC: ;
 793 ]])
 794
 795 AT_BISON_CHECK([input.y], [1], [],
 796 [[input.y:3.1-4: rule given for PREC, which is a token
 797 ]])
 798
 799 AT_CLEANUP
 800
 801
 802 ## -------------------------------- ##
 803 ## Reject unused %code qualifiers.  ##
 804 ## -------------------------------- ##
 805
 806 AT_SETUP([Reject unused %code qualifiers])
 807
 808 AT_DATA([input-c.y],
 809 [[%code q {}
 810 %code bad {}
 811 %code bad {}
 812 %code format {}
 813 %%
 814 start: ;
 815 ]])
 816 AT_BISON_CHECK([[input-c.y]], [0], [],
 817 [[input-c.y:1.7: warning: %code qualifier `q' is not used
 818 input-c.y:2.7-9: warning: %code qualifier `bad' is not used
 819 input-c.y:3.7-9: warning: %code qualifier `bad' is not used
 820 input-c.y:4.7-12: warning: %code qualifier `format' is not used
 821 ]])
 822
 823 AT_DATA([input-c-glr.y],
 824 [[%code q {}
 825 %code bad {}
 826  %code bad {}
 827 %%
 828 start: ;
 829 ]])
 830 AT_BISON_CHECK([[input-c-glr.y]], [0], [],
 831 [[input-c-glr.y:1.7: warning: %code qualifier `q' is not used
 832 input-c-glr.y:2.7-9: warning: %code qualifier `bad' is not used
 833 input-c-glr.y:3.8-10: warning: %code qualifier `bad' is not used
 834 ]])
 835
 836 AT_DATA([input-c++.y],
 837 [[%code q {}
 838 %code bad {}
 839  %code q {}
 840 %%
 841 start: ;
 842 ]])
 843 AT_BISON_CHECK([[input-c++.y]], [0], [],
 844 [[input-c++.y:1.7: warning: %code qualifier `q' is not used
 845 input-c++.y:2.7-9: warning: %code qualifier `bad' is not used
 846 input-c++.y:3.8: warning: %code qualifier `q' is not used
 847 ]])
 848
 849 AT_DATA([input-c++-glr.y],
 850 [[%code bad {}
 851 %code q {}
 852 %code q {}
 853 %%
 854 start: ;
 855 ]])
 856 AT_BISON_CHECK([[input-c++-glr.y]], [0], [],
 857 [[input-c++-glr.y:1.7-9: warning: %code qualifier `bad' is not used
 858 input-c++-glr.y:2.7: warning: %code qualifier `q' is not used
 859 input-c++-glr.y:3.7: warning: %code qualifier `q' is not used
 860 ]])
 861
 862 AT_DATA([special-char-@@.y],
 863 [[%code bad {}
 864 %code q {}
 865 %code q {}
 866 %%
 867 start: ;
 868 ]])
 869 AT_BISON_CHECK([[special-char-@@.y]], [0], [],
 870 [[special-char-@@.y:1.7-9: warning: %code qualifier `bad' is not used
 871 special-char-@@.y:2.7: warning: %code qualifier `q' is not used
 872 special-char-@@.y:3.7: warning: %code qualifier `q' is not used
 873 ]])
 874
 875 AT_DATA([special-char-@:>@.y],
 876 [[%code bad {}
 877 %code q {}
 878 %code q {}
 879 %%
 880 start: ;
 881 ]])
 882 AT_BISON_CHECK([[special-char-@:>@.y]], [0], [],
 883 [[special-char-@:>@.y:1.7-9: warning: %code qualifier `bad' is not used
 884 special-char-@:>@.y:2.7: warning: %code qualifier `q' is not used
 885 special-char-@:>@.y:3.7: warning: %code qualifier `q' is not used
 886 ]])
 887
 888 AT_CLEANUP
 889
 890
 891 ## ---------------- ##
 892 ## %define errors.  ##
 893 ## ---------------- ##
 894
 895 AT_SETUP([%define errors])
 896
 897 AT_DATA([input-redefined.y],
 898 [[%define var "value1"
 899 %define var "value1"
 900  %define var "value2"
 901 %define special1 "@:>@"
 902 %define special2 "@<:@"
 903 %%
 904 start: ;
 905 ]])
 906
 907 AT_BISON_CHECK([[input-redefined.y]], [[1]], [],
 908 [[input-redefined.y:2.9-11: %define variable `var' redefined
 909 input-redefined.y:1.9-11: previous definition
 910 input-redefined.y:3.10-12: %define variable `var' redefined
 911 input-redefined.y:2.9-11: previous definition
 912 ]])
 913
 914 AT_DATA([input-unused.y],
 915 [[%define var "value"
 916 %%
 917 start: ;
 918 ]])
 919
 920 AT_BISON_CHECK([[input-unused.y]], [[0]], [],
 921 [[input-unused.y:1.9-11: warning: %define variable `var' is not used
 922 ]])
 923
 924 AT_CLEANUP
 925
 926
 927 ## ----------------------------------- ##
 928 ## %define, --define, --force-define.  ##
 929 ## ----------------------------------- ##
 930
 931 AT_SETUP([%define, --define, --force-define])
 932
 933 AT_DATA([skel.c],
 934 [[m4@&t@_divert_push(0)@
 935 @output(b4_parser_file_name@)@
 936 [var-dd: ]b4_percent_define_get([[var-dd]])[
 937 var-ff: ]b4_percent_define_get([[var-ff]])[
 938 var-dfg: ]b4_percent_define_get([[var-dfg]])[
 939 var-fd: ]b4_percent_define_get([[var-fd]])
 940 m4@&t@_divert_pop(0)
 941 ]])
 942
 943 AT_DATA([input.y],
 944 [[%define var-dfg "gram"
 945 %%
 946 start: ;
 947 ]])
 948
 949 AT_BISON_CHECK([[-Dvar-dd=cmd-d1 -Dvar-dd=cmd-d2 \
 950                  -Fvar-ff=cmd-f1 -Fvar-ff=cmd-f2 \
 951                  -Dvar-dfg=cmd-d -Fvar-dfg=cmd-f \
 952                  -Fvar-fd=cmd-f -Dvar-fd=cmd-d   \
 953                  -Dunused-d -Funused-f           \
 954                  --skeleton ./skel.c input.y]], [[0]], [],
 955 [[<command line>:10: warning: %define variable `unused-d' is not used
 956 <command line>:11: warning: %define variable `unused-f' is not used
 957 ]])
 958
 959 AT_CHECK([[cat input.tab.c]], [[0]],
 960 [[var-dd: cmd-d2
 961 var-ff: cmd-f2
 962 var-dfg: cmd-f
 963 var-fd: cmd-d
 964 ]])
 965
 966 AT_DATA([input-dg.y],
 967 [[%define var "gram"
 968 %%
 969 start: ;
 970 ]])
 971
 972 AT_BISON_CHECK([[-Dvar=cmd-d input-dg.y]], [[1]], [],
 973 [[input-dg.y:1.9-11: %define variable `var' redefined
 974 <command line>:2: previous definition
 975 ]])
 976
 977 AT_CLEANUP
 978
 979 ## --------------------------- ##
 980 ## %define Boolean variables.  ##
 981 ## --------------------------- ##
 982
 983 AT_SETUP([[%define Boolean variables]])
 984
 985 AT_DATA([Input.y],
 986 [[%language "Java"
 987 %define public "maybe"
 988 %define parser_class_name "Input"
 989 %%
 990 start: ;
 991 ]])
 992
 993 AT_BISON_CHECK([[Input.y]], [1], [],
 994 [[Input.y:2.9-14: invalid value for %define Boolean variable `public'
 995 ]])
 996
 997 AT_CLEANUP
 998
 999 ## ------------------------ ##
1000 ## %define enum variables.  ##
1001 ## ------------------------ ##
1002
1003 AT_SETUP([[%define enum variables]])
1004
1005 # Front-end.
1006 AT_DATA([[input.y]],
1007 [[%define lr.default-reductions "bogus"
1008 %%
1009 start: ;
1010 ]])
1011 AT_BISON_CHECK([[input.y]], [[1]], [[]],
1012 [[input.y:1.9-29: invalid value for %define variable `lr.default-reductions': `bogus'
1013 input.y:1.9-29: accepted value: `all'
1014 input.y:1.9-29: accepted value: `consistent'
1015 input.y:1.9-29: accepted value: `accepting'
1016 ]])
1017
1018 # Back-end.
1019 AT_DATA([[input.y]],
1020 [[%define api.push-pull "neither"
1021 %%
1022 start: ;
1023 ]])
1024 AT_BISON_CHECK([[input.y]], [1], [],
1025 [[input.y:1.9-21: invalid value for %define variable `api.push-pull': `neither'
1026 input.y:1.9-21: accepted value: `pull'
1027 input.y:1.9-21: accepted value: `push'
1028 input.y:1.9-21: accepted value: `both'
1029 ]])
1030
1031 AT_CLEANUP
1032
1033 ## -------------------------------- ##
1034 ## %define backward compatibility.  ##
1035 ## -------------------------------- ##
1036
1037 AT_SETUP([[%define backward compatibility]])
1038
1039 # The error messages tell us whether underscores in these variables are
1040 # being converted to dashes.
1041
1042 AT_DATA([[input.y]],
1043 [[%define api.push_pull "neither"
1044 %%
1045 start: ;
1046 ]])
1047 AT_BISON_CHECK([[input.y]], [1], [],
1048 [[input.y:1.9-21: invalid value for %define variable `api.push-pull': `neither'
1049 input.y:1.9-21: accepted value: `pull'
1050 input.y:1.9-21: accepted value: `push'
1051 input.y:1.9-21: accepted value: `both'
1052 ]])
1053
1054 AT_DATA([[input.y]],
1055 [[%define lr.keep_unreachable_states "maybe"
1056 %%
1057 start: ;
1058 ]])
1059 AT_BISON_CHECK([[input.y]], [1], [],
1060 [[input.y:1.9-34: invalid value for %define Boolean variable `lr.keep-unreachable-states'
1061 ]])
1062
1063 AT_DATA([[input.y]],
1064 [[%define foo_bar "baz"
1065 %%
1066 start: ;
1067 ]])
1068 AT_BISON_CHECK([[input.y]], [0], [],
1069 [[input.y:1.9-15: warning: %define variable `foo_bar' is not used
1070 ]])
1071
1072 AT_CLEANUP
1073
1074 ## ------------------------- ##
1075 ## Unused %define api.pure.  ##
1076 ## ------------------------- ##
1077
1078 AT_SETUP([[Unused %define api.pure]])
1079
1080 # AT_CHECK_API_PURE(DECLS, VALUE)
1081 # -------------------------------
1082 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
1083 # are specified.
1084 m4_define([AT_CHECK_API_PURE],
1085 [
1086 AT_DATA([[input.y]],
1087 [[%define api.pure ]$2[
1088 ]$1[
1089 %%
1090 start: ;
1091 ]])
1092
1093 AT_BISON_CHECK([[input.y]], [0], [],
1094 [[input.y:1.9-16: warning: %define variable `api.pure' is not used
1095 ]])
1096 ])
1097
1098 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
1099 AT_CHECK_API_PURE([[%language "c++" %defines]], [["false"]])
1100 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
1101 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [["false"]])
1102 AT_CHECK_API_PURE([[%language "java"]], [["true"]])
1103 AT_CHECK_API_PURE([[%language "java"]], [["false"]])
1104
1105 AT_CLEANUP
1106
1107 ## -------------------------------- ##
1108 ## C++ namespace reference errors.  ##
1109 ## -------------------------------- ##
1110
1111 AT_SETUP([[C++ namespace reference errors]])
1112
1113 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
1114 # -------------------------------------------------------------
1115 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
1116 m4_define([AT_CHECK_NAMESPACE_ERROR],
1117 [
1118 AT_DATA([[input.y]],
1119 [[%language "C++"
1120 %defines
1121 %define namespace "]$1["
1122 %%
1123 start: ;
1124 ]])
1125
1126 AT_BISON_CHECK([[input.y]], [1], [],
1127 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
1128 [[input.y:3.9-17: ]b4_arg[
1129 ]])])
1130 ])
1131
1132 AT_CHECK_NAMESPACE_ERROR([[]],
1133                          [[namespace reference is empty]])
1134 AT_CHECK_NAMESPACE_ERROR([[                             ]],
1135                          [[namespace reference is empty]])
1136 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
1137                          [[namespace reference has consecutive "::"]])
1138 AT_CHECK_NAMESPACE_ERROR([[foo::        ::bar]],
1139                          [[namespace reference has consecutive "::"]])
1140 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
1141                          [[namespace reference has consecutive "::"]])
1142 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
1143                          [[namespace reference has consecutive "::"]])
1144 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ::]],
1145                          [[namespace reference has consecutive "::"]],
1146                          [[namespace reference has a trailing "::"]])
1147 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
1148                          [[namespace reference has a trailing "::"]])
1149 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ]],
1150                          [[namespace reference has a trailing "::"]])
1151 AT_CHECK_NAMESPACE_ERROR([[::]],
1152                          [[namespace reference has a trailing "::"]])
1153
1154 AT_CLEANUP
1155
1156 ## ------------------------ ##
1157 ## Bad character literals.  ##
1158 ## ------------------------ ##
1159
1160 # Bison used to accept character literals that were empty or contained
1161 # too many characters.
1162
1163 # FIXME: AT_DATA or some variant of AT_DATA may eventually permit
1164 # the final newline to be omitted.  See the threads starting at
1165 # <http://lists.gnu.org/archive/html/bison-patches/2009-07/msg00019.html>.
1166
1167 AT_SETUP([[Bad character literals]])
1168
1169 AT_DATA([empty.y],
1170 [[%%
1171 start: '';
1172 start: '
1173 ]])
1174 AT_CHECK([[perl -e "print 'start: \'';" >> empty.y || exit 77]])
1175
1176 AT_BISON_CHECK([empty.y], [1], [],
1177 [[empty.y:2.8-9: warning: empty character literal
1178 empty.y:3.8-4.0: warning: empty character literal
1179 empty.y:3.8-4.0: missing `'' at end of line
1180 empty.y:4.8: warning: empty character literal
1181 empty.y:4.8: missing `'' at end of file
1182 ]])
1183
1184 AT_DATA([two.y],
1185 [[%%
1186 start: 'ab';
1187 start: 'ab
1188 ]])
1189 AT_CHECK([[perl -e "print 'start: \'ab';" >> two.y || exit 77]])
1190
1191 AT_BISON_CHECK([two.y], [1], [],
1192 [[two.y:2.8-11: warning: extra characters in character literal
1193 two.y:3.8-4.0: warning: extra characters in character literal
1194 two.y:3.8-4.0: missing `'' at end of line
1195 two.y:4.8-10: warning: extra characters in character literal
1196 two.y:4.8-10: missing `'' at end of file
1197 ]])
1198
1199 AT_DATA([three.y],
1200 [[%%
1201 start: 'abc';
1202 start: 'abc
1203 ]])
1204 AT_CHECK([[perl -e "print 'start: \'abc';" >> three.y || exit 77]])
1205
1206 AT_BISON_CHECK([three.y], [1], [],
1207 [[three.y:2.8-12: warning: extra characters in character literal
1208 three.y:3.8-4.0: warning: extra characters in character literal
1209 three.y:3.8-4.0: missing `'' at end of line
1210 three.y:4.8-11: warning: extra characters in character literal
1211 three.y:4.8-11: missing `'' at end of file
1212 ]])
1213
1214 AT_CLEANUP
1215
1216 ## ------------------------- ##
1217 ## Bad escapes in literals.  ##
1218 ## ------------------------- ##
1219
1220 AT_SETUP([[Bad escapes in literals]])
1221
1222 AT_DATA([input.y],
1223 [[%%
1224 start: '\777' '\0' '\xfff' '\x0'
1225        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
1226        '\ ' '\A';
1227 ]])
1228
1229 # It is not easy to create special characters, we cannot even trust tr.
1230 # Beside we cannot even expect "echo '\0'" to output two characters
1231 # (well three with \n): at least Bash 3.2 converts the two-character
1232 # sequence "\0" into a single NUL character.
1233 AT_CHECK([[perl -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
1234            || exit 77]])
1235
1236 AT_BISON_CHECK([input.y], [1], [],
1237 [[input.y:2.9-12: invalid number after \-escape: 777
1238 input.y:2.8-13: warning: empty character literal
1239 input.y:2.16-17: invalid number after \-escape: 0
1240 input.y:2.15-18: warning: empty character literal
1241 input.y:2.21-25: invalid number after \-escape: xfff
1242 input.y:2.20-26: warning: empty character literal
1243 input.y:2.29-31: invalid number after \-escape: x0
1244 input.y:2.28-32: warning: empty character literal
1245 input.y:3.9-14: invalid number after \-escape: uffff
1246 input.y:3.8-15: warning: empty character literal
1247 input.y:3.18-23: invalid number after \-escape: u0000
1248 input.y:3.17-24: warning: empty character literal
1249 input.y:3.27-36: invalid number after \-escape: Uffffffff
1250 input.y:3.26-37: warning: empty character literal
1251 input.y:3.40-49: invalid number after \-escape: U00000000
1252 input.y:3.39-50: warning: empty character literal
1253 input.y:4.9-10: invalid character after \-escape: ` '
1254 input.y:4.8-11: warning: empty character literal
1255 input.y:4.14-15: invalid character after \-escape: A
1256 input.y:4.13-16: warning: empty character literal
1257 input.y:5.9-16: invalid character after \-escape: \t
1258 input.y:5.17: invalid character after \-escape: \f
1259 input.y:5.18: invalid character after \-escape: \0
1260 input.y:5.19: invalid character after \-escape: \001
1261 ]])
1262
1263 AT_CLEANUP