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: $$ for the midrule at $2 of `exp' has no declared type
  62 input.y:5.24-25: $2 of `exp' has no declared type
  63 input.y:5.6-32: warning: type clash on default action: <bar> != <>
  64 input.y:6.6-8: warning: type clash on default action: <bar> != <>
  65 input.y:7.5: warning: empty rule for typed nonterminal, and no action
  66 ]])
  67
  68 AT_CLEANUP
  69
  70
  71 # _AT_UNUSED_VALUES_DECLARATIONS()
  72 # --------------------------------
  73 # Generate the token, type, and destructor
  74 # declarations for the unused values tests.
  75 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
  76 [[[%token <integer> INT;
  77 %type <integer> a b c d e f g h i j k l;
  78 %destructor { destroy ($$); } 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: $]$[
 117 input.y:11.10-32: warning: unused value: $]1[
 118 input.y:11.10-32: warning: unused value: $]3[
 119 input.y:11.10-32: warning: unused value: $]5[
 120 input.y:12.9: warning: empty rule for typed nonterminal, and no action
 121 ]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $$
 122 input.y:13.26-41: warning: unset value: $$
 123 ]]])[[input.y:13.10-62: warning: unset value: $]$[
 124 input.y:13.10-62: warning: unused value: $]3[
 125 input.y:13.10-62: warning: unused value: $]5[
 126 ]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
 127 ]]])[[input.y:14.10-49: warning: unset value: $]$[
 128 input.y:14.10-49: warning: unused value: $]3[
 129 input.y:14.10-49: warning: unused value: $]5[
 130 input.y:15.10-37: warning: unset value: $]$[
 131 input.y:15.10-37: warning: unused value: $]3[
 132 input.y:15.10-37: warning: unused value: $]5[
 133 input.y:17.10-58: warning: unset value: $]$[
 134 input.y:17.10-58: warning: unused value: $]1[
 135 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
 136 ]]])[[input.y:17.10-58: warning: unused value: $]3[
 137 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[
 138 ]]])[[input.y:17.10-58: warning: unused value: $]5[
 139 input.y:18.10-72: warning: unset value: $]$[
 140 input.y:18.10-72: warning: unused value: $]1[
 141 input.y:18.10-72: warning: unused value: $]3[
 142 ]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
 143 ]]])[[input.y:18.10-72: warning: unused value: $]5[
 144 ]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[
 145 ]]])[[input.y:21.10-68: warning: unset value: $]$[
 146 input.y:21.10-68: warning: unused value: $]1[
 147 input.y:21.10-68: warning: unused value: $]2[
 148 ]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
 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 { destroy ($$); } <*> <*>
 181
 182 %destructor { destroy ($$); } <*>
 183 %printer { destroy ($$); } <*>
 184
 185 %destructor { destroy ($$); } <> <>
 186 %printer { destroy ($$); } <> <>
 187
 188 %destructor { destroy ($$); } <>
 189 %printer { destroy ($$); } <>
 190
 191 %%
 192
 193 start: ;
 194
 195 %destructor { destroy ($$); } <*>;
 196 %printer { destroy ($$); } <*>;
 197
 198 %destructor { destroy ($$); } <>;
 199 %printer { destroy ($$); } <>;
 200 ]])
 201
 202 AT_BISON_CHECK([input.y], [1], [],
 203 [[input.y:1.13-29: redeclaration for default tagged %destructor
 204 input.y:1.13-29: previous declaration
 205 input.y:2.10-26: redeclaration for default tagged %printer
 206 input.y:2.10-26: previous declaration
 207 input.y:4.13-29: redeclaration for default tagged %destructor
 208 input.y:1.13-29: previous declaration
 209 input.y:5.10-26: redeclaration for default tagged %printer
 210 input.y:2.10-26: previous declaration
 211 input.y:7.13-29: redeclaration for default tagless %destructor
 212 input.y:7.13-29: previous declaration
 213 input.y:8.10-26: redeclaration for default tagless %printer
 214 input.y:8.10-26: previous declaration
 215 input.y:10.13-29: redeclaration for default tagless %destructor
 216 input.y:7.13-29: previous declaration
 217 input.y:11.10-26: redeclaration for default tagless %printer
 218 input.y:8.10-26: previous declaration
 219 input.y:17.13-29: redeclaration for default tagged %destructor
 220 input.y:4.13-29: previous declaration
 221 input.y:18.10-26: redeclaration for default tagged %printer
 222 input.y:5.10-26: previous declaration
 223 input.y:20.13-29: redeclaration for default tagless %destructor
 224 input.y:10.13-29: previous declaration
 225 input.y:21.10-26: redeclaration for default tagless %printer
 226 input.y:11.10-26: previous declaration
 227 ]])
 228
 229 AT_CLEANUP
 230
 231
 232 ## ---------------------------------------------- ##
 233 ## Per-type %printer and %destructor redeclared.  ##
 234 ## ---------------------------------------------- ##
 235
 236 AT_SETUP([Per-type %printer and %destructor redeclared])
 237
 238 AT_DATA([[input.y]],
 239 [[%destructor { destroy ($$); } <field1> <field2>
 240 %printer { destroy ($$); } <field1> <field2>
 241
 242 %destructor { destroy ($$); } <field1> <field1>
 243 %printer { destroy ($$); } <field2> <field2>
 244
 245 %%
 246
 247 start: ;
 248
 249 %destructor { destroy ($$); } <field2> <field1>;
 250 %printer { destroy ($$); } <field2> <field1>;
 251 ]])
 252
 253 AT_BISON_CHECK([input.y], [1], [],
 254 [[input.y:4.13-29: %destructor redeclaration for <field1>
 255 input.y:1.13-29: previous declaration
 256 input.y:4.13-29: %destructor redeclaration for <field1>
 257 input.y:4.13-29: previous declaration
 258 input.y:5.10-26: %printer redeclaration for <field2>
 259 input.y:2.10-26: previous declaration
 260 input.y:5.10-26: %printer redeclaration for <field2>
 261 input.y:5.10-26: previous declaration
 262 input.y:11.13-29: %destructor redeclaration for <field1>
 263 input.y:4.13-29: previous declaration
 264 input.y:11.13-29: %destructor redeclaration for <field2>
 265 input.y:1.13-29: previous declaration
 266 input.y:12.10-26: %printer redeclaration for <field1>
 267 input.y:2.10-26: previous declaration
 268 input.y:12.10-26: %printer redeclaration for <field2>
 269 input.y:5.10-26: previous declaration
 270 ]])
 271
 272 AT_CLEANUP
 273
 274
 275 ## ---------------------------------------- ##
 276 ## Unused values with default %destructor.  ##
 277 ## ---------------------------------------- ##
 278
 279 AT_SETUP([Unused values with default %destructor])
 280
 281 AT_DATA([[input.y]],
 282 [[%destructor { destroy ($$); } <>
 283 %type <tag> tagged
 284
 285 %%
 286
 287 start: end end tagged tagged { $<tag>1; $3; } ;
 288 end: { } ;
 289 tagged: { } ;
 290 ]])
 291
 292 AT_BISON_CHECK([input.y], [0], [],
 293 [[input.y:6.8-45: warning: unset value: $$
 294 input.y:6.8-45: warning: unused value: $2
 295 input.y:7.6-8: warning: unset value: $$
 296 ]])
 297
 298 AT_DATA([[input.y]],
 299 [[%destructor { destroy ($$); } <*>
 300 %type <tag> tagged
 301
 302 %%
 303
 304 start: end end tagged tagged { $<tag>1; $3; } ;
 305 end: { } ;
 306 tagged: { } ;
 307 ]])
 308
 309 AT_BISON_CHECK([input.y], [0], [],
 310 [[input.y:6.8-45: warning: unused value: $4
 311 input.y:8.9-11: warning: unset value: $$
 312 ]])
 313
 314 AT_CLEANUP
 315
 316
 317 ## ----------------------------------------- ##
 318 ## Unused values with per-type %destructor.  ##
 319 ## ----------------------------------------- ##
 320
 321 AT_SETUP([Unused values with per-type %destructor])
 322
 323 AT_DATA([[input.y]],
 324 [[%destructor { destroy ($$); } <field1>
 325 %type <field1> start end
 326
 327 %%
 328
 329 start: end end { $1; } ;
 330 end: { }  ;
 331 ]])
 332
 333 AT_BISON_CHECK([input.y], [0], [],
 334 [[input.y:6.8-22: warning: unset value: $$
 335 input.y:6.8-22: warning: unused value: $2
 336 input.y:7.6-8: warning: unset value: $$
 337 ]])
 338
 339 AT_CLEANUP
 340
 341
 342 ## ---------------------- ##
 343 ## Incompatible Aliases.  ##
 344 ## ---------------------- ##
 345
 346 AT_SETUP([Incompatible Aliases])
 347
 348 AT_DATA([input.y],
 349 [[%token foo "foo"
 350
 351 %type <bar>       foo
 352 %printer {bar}    foo
 353 %destructor {bar} foo
 354 %left             foo
 355
 356 %type <baz>       "foo"
 357 %printer {baz}    "foo"
 358 %destructor {baz} "foo"
 359 %left             "foo"
 360
 361 %%
 362 exp: foo;
 363 ]])
 364
 365 AT_BISON_CHECK([input.y], [1], [],
 366 [[input.y:8.7-11: %type redeclaration for foo
 367 input.y:3.7-11: previous declaration
 368 input.y:10.13-17: %destructor redeclaration for foo
 369 input.y:5.13-17: previous declaration
 370 input.y:9.10-14: %printer redeclaration for foo
 371 input.y:4.10-14: previous declaration
 372 input.y:11.1-5: %left redeclaration for foo
 373 input.y:6.1-5: previous declaration
 374 ]])
 375
 376 AT_CLEANUP
 377
 378
 379
 380 ## ----------------------- ##
 381 ## Torturing the Scanner.  ##
 382 ## ----------------------- ##
 383
 384 # Be sure to compile and run, so that the C compiler checks what
 385 # we do.
 386
 387 AT_SETUP([Torturing the Scanner])
 388
 389
 390 AT_DATA([input.y], [])
 391 AT_BISON_CHECK([input.y], [1], [],
 392 [[input.y:1.1: syntax error, unexpected end of file
 393 ]])
 394
 395
 396 AT_DATA([input.y],
 397 [{}
 398 ])
 399 AT_BISON_CHECK([input.y], [1], [],
 400 [[input.y:1.1-2: syntax error, unexpected {...}
 401 ]])
 402
 403
 404 AT_DATA_GRAMMAR([input.y],
 405 [[%{
 406 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 407 const char *foo = "So %{ and %} can be here too.";
 408
 409 #if 0
 410 /* These examples test Bison while not stressing C compilers too much.
 411    Many C compilers mishandle backslash-newlines, so this part of the
 412    test is inside "#if 0".  The comment and string are written so that
 413    the "#endif" will be seen regardless of the C compiler bugs that we
 414    know about, namely:
 415
 416      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 417      comment.
 418
 419      The Apple Darwin compiler (as of late 2002) mishandles
 420      \\[newline]' within a character constant.
 421
 422    */
 423
 424 /\
 425 * A comment with backslash-newlines in it. %} *\
 426 \
 427 /
 428 /* { Close the above comment, if the C compiler mishandled it.  */
 429
 430 char str[] = "\\
 431 " A string with backslash-newlines in it %{ %} \\
 432 \
 433 "";
 434
 435 char apostrophe = '\'';
 436 #endif
 437
 438 #include <stdio.h>
 439 #include <stdlib.h>
 440 %}
 441 /* %{ and %} can be here too. */
 442
 443 %{
 444 /* Exercise pre-prologue dependency to %union.  */
 445 typedef int value;
 446 %}
 447
 448 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 449
 450 /* Also exercise %union. */
 451 %union
 452 {
 453   value ival; /* A comment to exercise an old bug. */
 454 };
 455
 456
 457 /* Exercise post-prologue dependency to %union.  */
 458 %{
 459 static YYSTYPE value_as_yystype (value val);
 460
 461 /* Exercise quotes in declarations.  */
 462 char quote[] = "@:>@@:>@,";
 463 %}
 464
 465 %{
 466 static void yyerror (const char *s);
 467 static int yylex (void);
 468 %}
 469
 470 %type <ival> '@<:@'
 471
 472 /* Exercise quotes in strings.  */
 473 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 474
 475 %%
 476 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 477 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 478   {
 479     /* Exercise quotes in braces.  */
 480     char tmp[] = "@<:@%c@:>@,\n";
 481     printf (tmp, $1);
 482   }
 483 ;
 484
 485 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 486 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 487 output.or.oline.opt: ;|oline;;|output;;;
 488 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 489 %%
 490 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 491
 492 static YYSTYPE
 493 value_as_yystype (value val)
 494 {
 495   YYSTYPE res;
 496   res.ival = val;
 497   return res;
 498 }
 499
 500 static int
 501 yylex (void)
 502 {
 503   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
 504 #output "; /* "
 505   */
 506   static size_t toknum;
 507   if (! (toknum < sizeof input))
 508     abort ();
 509   yylval = value_as_yystype (input[toknum]);
 510   return input[toknum++];
 511 }
 512
 513 static void
 514 yyerror (const char *msg)
 515 {
 516   fprintf (stderr, "%s\n", msg);
 517 }
 518 ]])
 519
 520 # Pacify Emacs'font-lock-mode: "
 521
 522 AT_DATA([main.c],
 523 [[typedef int value;
 524 #include "input.h"
 525
 526 int yyparse (void);
 527
 528 int
 529 main (void)
 530 {
 531   return yyparse ();
 532 }
 533 ]])
 534
 535 AT_BISON_CHECK([-d -v -o input.c input.y])
 536 AT_COMPILE([input.o], [-c input.c])
 537 AT_COMPILE([main.o], [-c main.c])
 538 AT_COMPILE([input], [input.o main.o])
 539 AT_PARSER_CHECK([./input], 0,
 540 [[[@<:@],
 541 ]])
 542
 543 AT_CLEANUP
 544
 545
 546 ## ---------------------- ##
 547 ## Typed symbol aliases.  ##
 548 ## ---------------------- ##
 549
 550 AT_SETUP([Typed symbol aliases])
 551
 552 # Bison 2.0 broke typed symbol aliases - ensure they work.
 553
 554 AT_DATA_GRAMMAR([input.y],
 555 [[%union
 556 {
 557   int val;
 558 };
 559 %token <val> MY_TOKEN "MY TOKEN"
 560 %type <val> exp
 561 %%
 562 exp: "MY TOKEN";
 563 %%
 564 ]])
 565
 566 AT_BISON_CHECK([-o input.c input.y])
 567
 568 AT_CLEANUP
 569
 570
 571 ## --------- ##
 572 ## Require.  ##
 573 ## --------- ##
 574
 575 m4_define([AT_CHECK_REQUIRE],
 576 [AT_SETUP([Require $1])
 577 AT_DATA_GRAMMAR([input.y],
 578 [[%require "$1";
 579 %%
 580 empty_file:;
 581 ]])
 582 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
 583 AT_CLEANUP
 584 ])
 585
 586 AT_CHECK_REQUIRE(1.0, 0)
 587 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 588 ## FIXME: Some day augment this version number.
 589 AT_CHECK_REQUIRE(100.0, 63)
 590
 591
 592 ## ------------------------------------- ##
 593 ## String aliases for character tokens.  ##
 594 ## ------------------------------------- ##
 595
 596 AT_SETUP([String aliases for character tokens])
 597
 598 # Bison once thought a character token and its alias were different
 599 # symbols with the same user token number.
 600
 601 AT_DATA_GRAMMAR([input.y],
 602 [[%token 'a' "a"
 603 %%
 604 start: 'a';
 605 %%
 606 ]])
 607
 608 AT_BISON_CHECK([-o input.c input.y])
 609
 610 AT_CLEANUP
 611
 612
 613 ## -------------- ##
 614 ## Symbol names.  ##
 615 ## -------------- ##
 616
 617 AT_SETUP([Symbols])
 618
 619 AT_DATA_GRAMMAR([input.y],
 620 [[%token WITH-DASH
 621 %token WITHOUT_DASH "WITHOUT-DASH"
 622 %token WITH.PERIOD
 623 %token WITHOUT_PERIOD "WITHOUT.PERIOD"
 624 %code {
 625   void yyerror (char const *);
 626   int yylex (void);
 627 }
 628 %%
 629 start: with-dash without_dash with.period without_period;
 630 with-dash: WITH-DASH;
 631 without_dash: "WITHOUT-DASH";
 632 with.period: WITH.PERIOD;
 633 without_period: "WITHOUT.PERIOD";
 634 %%
 635 ]])
 636
 637 # POSIX Yacc accept periods, but not dashes.
 638 AT_BISON_CHECK([--yacc input.y], [1], [],
 639 [[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 640 input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
 641 ]])
 642
 643 # So warn about them.
 644 AT_BISON_CHECK([-Wyacc input.y], [], [],
 645 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 646 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
 647 ]])
 648
 649 # Dashes are fine for GNU Bison.
 650 AT_BISON_CHECK([-o input.c input.y])
 651
 652 # Make sure we don't export silly token identifiers with periods or dashes.
 653 AT_COMPILE([input.o], [-c input.c])
 654
 655
 656 # Periods and dashes are genuine letters, they can start identifiers.
 657 # Digits cannot.
 658 AT_DATA_GRAMMAR([input.y],
 659 [[%token .GOOD
 660          -GOOD
 661          1NV4L1D
 662 %%
 663 start: .GOOD -GOOD
 664 ]])
 665 AT_BISON_CHECK([-o input.c input.y], [1], [],
 666 [[input.y:11.10-16: invalid identifier: `1NV4L1D'
 667 ]])
 668
 669 AT_CLEANUP
 670
 671
 672 ## ----------------- ##
 673 ## Numbered tokens.  ##
 674 ## ----------------- ##
 675
 676 AT_SETUP([Numbered tokens])
 677
 678 AT_DATA_GRAMMAR([redecl.y],
 679 [[%token DECIMAL_1     11259375
 680          HEXADECIMAL_1 0xabcdef
 681          HEXADECIMAL_2 0xFEDCBA
 682          DECIMAL_2     16702650
 683 %%
 684 start: DECIMAL_1 HEXADECIMAL_2;
 685 ]])
 686
 687 AT_BISON_CHECK([redecl.y], [1], [],
 688 [[redecl.y:10.10-22: user token number 11259375 redeclaration for HEXADECIMAL_1
 689 redecl.y:9.8-16: previous declaration for DECIMAL_1
 690 redecl.y:12.10-18: user token number 16702650 redeclaration for DECIMAL_2
 691 redecl.y:11.10-22: previous declaration for HEXADECIMAL_2
 692 ]])
 693
 694 AT_DATA_GRAMMAR([too-large.y],
 695 [[%token TOO_LARGE_DEC 999999999999999999999
 696          TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
 697 %%
 698 start: TOO_LARGE_DEC TOO_LARGE_HEX
 699 %%
 700 ]])
 701
 702 AT_BISON_CHECK([too-large.y], [1], [],
 703 [[too-large.y:9.22-42: integer out of range: `999999999999999999999'
 704 too-large.y:10.24-44: integer out of range: `0xFFFFFFFFFFFFFFFFFFF'
 705 ]])
 706
 707 AT_CLEANUP
 708
 709
 710 ## --------------------- ##
 711 ## Unclosed constructs.  ##
 712 ## --------------------- ##
 713
 714 AT_SETUP([Unclosed constructs])
 715
 716 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed
 717 # constructs, so they were prepended to whatever it STRING_GROW'ed
 718 # next.  It also threw them away rather than returning them to the
 719 # parser.  The effect was confusing subsequent error messages.
 720
 721 AT_DATA([input.y],
 722 [[%token A "a
 723 %token B "b"
 724 %token AB "ab" // Used to complain that "ab" was already used.
 725 %token C '1
 726 %token TWO "2"
 727 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
 728
 729 %%
 730
 731 start: ;
 732
 733 // Used to report a syntax error because it didn't see any kind of symbol
 734 // identifier.
 735 %type <f> 'a
 736 ;
 737 %type <f> "a
 738 ;
 739 // Used to report a syntax error because it didn't see braced code.
 740 %destructor { free ($$)
 741 ]])
 742
 743 AT_BISON_CHECK([-o input.c input.y], 1, [],
 744 [[input.y:1.10-2.0: missing `"' at end of line
 745 input.y:4.10-5.0: missing `'' at end of line
 746 input.y:14.11-15.0: missing `'' at end of line
 747 input.y:16.11-17.0: missing `"' at end of line
 748 input.y:19.13-20.0: missing `}' at end of file
 749 input.y:20.1: syntax error, unexpected end of file
 750 ]])
 751
 752 AT_CLEANUP
 753
 754
 755 ## ------------------------- ##
 756 ## %start after first rule.  ##
 757 ## ------------------------- ##
 758
 759 AT_SETUP([%start after first rule])
 760
 761 # Bison once complained that a %start after the first rule was a
 762 # redeclaration of the start symbol.
 763
 764 AT_DATA([input.y],
 765 [[%%
 766 false_start: ;
 767 start: false_start ;
 768 %start start;
 769 ]])
 770
 771 AT_BISON_CHECK([-o input.c input.y])
 772
 773 AT_CLEANUP
 774
 775
 776 ## --------------------- ##
 777 ## %prec takes a token.  ##
 778 ## --------------------- ##
 779
 780 AT_SETUP([%prec takes a token])
 781
 782 # Bison once allowed %prec sym where sym was a nonterminal.
 783
 784 AT_DATA([input.y],
 785 [[%%
 786 start: PREC %prec PREC ;
 787 PREC: ;
 788 ]])
 789
 790 AT_BISON_CHECK([input.y], [1], [],
 791 [[input.y:3.1-4: rule given for PREC, which is a token
 792 ]])
 793
 794 AT_CLEANUP
 795
 796
 797 ## ------------------------------- ##
 798 ## %prec's token must be defined.  ##
 799 ## ------------------------------- ##
 800
 801 AT_SETUP([[%prec's token must be defined]])
 802
 803 # According to POSIX, a %prec token must be defined separately.
 804
 805 AT_DATA([[input.y]],
 806 [[%%
 807 start: %prec PREC ;
 808 ]])
 809
 810 AT_BISON_CHECK([[input.y]], [[1]], [],
 811 [[input.y:2.8-17: token for %prec is not defined: PREC
 812 ]])
 813
 814 AT_CLEANUP
 815
 816
 817 ## -------------------------------- ##
 818 ## Reject unused %code qualifiers.  ##
 819 ## -------------------------------- ##
 820
 821 AT_SETUP([Reject unused %code qualifiers])
 822
 823 AT_DATA([input-c.y],
 824 [[%code q {}
 825 %code bad {}
 826 %code bad {}
 827 %code format {}
 828 %%
 829 start: ;
 830 ]])
 831 AT_BISON_CHECK([[input-c.y]], [[1]], [],
 832 [[input-c.y:1.7: %code qualifier `q' is not used
 833 input-c.y:2.7-9: %code qualifier `bad' is not used
 834 input-c.y:3.7-9: %code qualifier `bad' is not used
 835 input-c.y:4.7-12: %code qualifier `format' is not used
 836 ]])
 837
 838 AT_DATA([input-c-glr.y],
 839 [[%code q {}
 840 %code bad {}
 841  %code bad {}
 842 %%
 843 start: ;
 844 ]])
 845 AT_BISON_CHECK([[input-c-glr.y]], [[1]], [],
 846 [[input-c-glr.y:1.7: %code qualifier `q' is not used
 847 input-c-glr.y:2.7-9: %code qualifier `bad' is not used
 848 input-c-glr.y:3.8-10: %code qualifier `bad' is not used
 849 ]])
 850
 851 AT_DATA([input-c++.y],
 852 [[%code q {}
 853 %code bad {}
 854  %code q {}
 855 %%
 856 start: ;
 857 ]])
 858 AT_BISON_CHECK([[input-c++.y]], [[1]], [],
 859 [[input-c++.y:1.7: %code qualifier `q' is not used
 860 input-c++.y:2.7-9: %code qualifier `bad' is not used
 861 input-c++.y:3.8: %code qualifier `q' is not used
 862 ]])
 863
 864 AT_DATA([input-c++-glr.y],
 865 [[%code bad {}
 866 %code q {}
 867 %code q {}
 868 %%
 869 start: ;
 870 ]])
 871 AT_BISON_CHECK([[input-c++-glr.y]], [[1]], [],
 872 [[input-c++-glr.y:1.7-9: %code qualifier `bad' is not used
 873 input-c++-glr.y:2.7: %code qualifier `q' is not used
 874 input-c++-glr.y:3.7: %code qualifier `q' is not used
 875 ]])
 876
 877 AT_DATA([special-char-@@.y],
 878 [[%code bad {}
 879 %code q {}
 880 %code q {}
 881 %%
 882 start: ;
 883 ]])
 884 AT_BISON_CHECK([[special-char-@@.y]], [[1]], [],
 885 [[special-char-@@.y:1.7-9: %code qualifier `bad' is not used
 886 special-char-@@.y:2.7: %code qualifier `q' is not used
 887 special-char-@@.y:3.7: %code qualifier `q' is not used
 888 ]])
 889
 890 AT_DATA([special-char-@:>@.y],
 891 [[%code bad {}
 892 %code q {}
 893 %code q {}
 894 %%
 895 start: ;
 896 ]])
 897 AT_BISON_CHECK([[special-char-@:>@.y]], [[1]], [],
 898 [[special-char-@:>@.y:1.7-9: %code qualifier `bad' is not used
 899 special-char-@:>@.y:2.7: %code qualifier `q' is not used
 900 special-char-@:>@.y:3.7: %code qualifier `q' is not used
 901 ]])
 902
 903 AT_CLEANUP
 904
 905
 906 ## ---------------- ##
 907 ## %define errors.  ##
 908 ## ---------------- ##
 909
 910 AT_SETUP([%define errors])
 911
 912 AT_DATA([input-redefined.y],
 913 [[%define var "value1"
 914 %define var "value1"
 915  %define var "value2"
 916 %define special1 "@:>@"
 917 %define special2 "@<:@"
 918 %%
 919 start: ;
 920 ]])
 921
 922 AT_BISON_CHECK([[input-redefined.y]], [[1]], [],
 923 [[input-redefined.y:2.9-11: %define variable `var' redefined
 924 input-redefined.y:1.9-11: previous definition
 925 input-redefined.y:3.10-12: %define variable `var' redefined
 926 input-redefined.y:2.9-11: previous definition
 927 ]])
 928
 929 AT_DATA([input-unused.y],
 930 [[%define var "value"
 931 %%
 932 start: ;
 933 ]])
 934
 935 AT_BISON_CHECK([[input-unused.y]], [[1]], [],
 936 [[input-unused.y:1.9-11: %define variable `var' is not used
 937 ]])
 938
 939 AT_CLEANUP
 940
 941
 942 ## ----------------------------------- ##
 943 ## %define, --define, --force-define.  ##
 944 ## ----------------------------------- ##
 945
 946 AT_SETUP([[%define, --define, --force-define]])
 947
 948 AT_DATA([[skel.c]],
 949 [[m4@&t@_divert_push(0)@
 950 @output(b4_parser_file_name@)@
 951 [var-dd: ]b4_percent_define_get([[var-dd]])[
 952 var-ff: ]b4_percent_define_get([[var-ff]])[
 953 var-dfg: ]b4_percent_define_get([[var-dfg]])[
 954 var-fd: ]b4_percent_define_get([[var-fd]])
 955 m4@&t@_divert_pop(0)
 956 ]])
 957 AT_DATA([[input.y]],
 958 [[%define var-dfg "gram"
 959 %%
 960 start: ;
 961 ]])
 962 AT_BISON_CHECK([[-Dvar-dd=cmd-d1 -Dvar-dd=cmd-d2 \
 963                  -Fvar-ff=cmd-f1 -Fvar-ff=cmd-f2 \
 964                  -Dvar-dfg=cmd-d -Fvar-dfg=cmd-f \
 965                  -Fvar-fd=cmd-f -Dvar-fd=cmd-d   \
 966                  --skeleton ./skel.c input.y]])
 967 AT_CHECK([[cat input.tab.c]], [[0]],
 968 [[var-dd: cmd-d2
 969 var-ff: cmd-f2
 970 var-dfg: cmd-f
 971 var-fd: cmd-d
 972 ]])
 973
 974 AT_DATA([[input-dg.y]],
 975 [[%define var "gram"
 976 %%
 977 start: ;
 978 ]])
 979 AT_BISON_CHECK([[-Dvar=cmd-d input-dg.y]], [[1]], [],
 980 [[input-dg.y:1.9-11: %define variable `var' redefined
 981 <command line>:2: previous definition
 982 ]])
 983
 984 AT_DATA([[input-unused.y]],
 985 [[%%
 986 start: ;
 987 ]])
 988 AT_BISON_CHECK([[-Dunused-d -Funused-f input-unused.y]], [[1]], [],
 989 [[<command line>:2: %define variable `unused-d' is not used
 990 <command line>:3: %define variable `unused-f' is not used
 991 ]])
 992
 993 AT_CLEANUP
 994
 995 ## --------------------------- ##
 996 ## %define Boolean variables.  ##
 997 ## --------------------------- ##
 998
 999 AT_SETUP([[%define Boolean variables]])
1000
1001 AT_DATA([Input.y],
1002 [[%language "Java"
1003 %define public "maybe"
1004 %define parser_class_name "Input"
1005 %%
1006 start: ;
1007 ]])
1008
1009 AT_BISON_CHECK([[Input.y]], [1], [],
1010 [[Input.y:2.9-14: invalid value for %define Boolean variable `public'
1011 ]])
1012
1013 AT_CLEANUP
1014
1015 ## ------------------------ ##
1016 ## %define enum variables.  ##
1017 ## ------------------------ ##
1018
1019 AT_SETUP([[%define enum variables]])
1020
1021 # Front-end.
1022 AT_DATA([[input.y]],
1023 [[%define lr.default-reductions bogus
1024 %%
1025 start: ;
1026 ]])
1027 AT_BISON_CHECK([[input.y]], [[1]], [[]],
1028 [[input.y:1.9-29: invalid value for %define variable `lr.default-reductions': `bogus'
1029 input.y:1.9-29: accepted value: `all'
1030 input.y:1.9-29: accepted value: `consistent'
1031 input.y:1.9-29: accepted value: `accepting'
1032 ]])
1033
1034 # Back-end.
1035 AT_DATA([[input.y]],
1036 [[%define api.push-pull neither
1037 %%
1038 start: ;
1039 ]])
1040 AT_BISON_CHECK([[input.y]], [1], [],
1041 [[input.y:1.9-21: invalid value for %define variable `api.push-pull': `neither'
1042 input.y:1.9-21: accepted value: `pull'
1043 input.y:1.9-21: accepted value: `push'
1044 input.y:1.9-21: accepted value: `both'
1045 ]])
1046
1047 AT_CLEANUP
1048
1049 ## -------------------------------- ##
1050 ## %define backward compatibility.  ##
1051 ## -------------------------------- ##
1052
1053 AT_SETUP([[%define backward compatibility]])
1054
1055 # The error messages tell us whether underscores in these variables are
1056 # being converted to dashes.
1057
1058 AT_DATA([[input.y]],
1059 [[%define api.push_pull "neither"
1060 %%
1061 start: ;
1062 ]])
1063 AT_BISON_CHECK([[input.y]], [1], [],
1064 [[input.y:1.9-21: invalid value for %define variable `api.push-pull': `neither'
1065 input.y:1.9-21: accepted value: `pull'
1066 input.y:1.9-21: accepted value: `push'
1067 input.y:1.9-21: accepted value: `both'
1068 ]])
1069
1070 AT_DATA([[input.y]],
1071 [[%define lr.keep_unreachable_states maybe
1072 %%
1073 start: ;
1074 ]])
1075 AT_BISON_CHECK([[input.y]], [1], [],
1076 [[input.y:1.9-34: invalid value for %define Boolean variable `lr.keep-unreachable-states'
1077 ]])
1078
1079 AT_DATA([[input.y]],
1080 [[%define namespace "foo"
1081 %define api.namespace "foo"
1082 %%
1083 start: ;
1084 ]])
1085 AT_BISON_CHECK([[input.y]], [1], [],
1086 [[input.y:2.9-21: %define variable `api.namespace' redefined
1087 input.y:1.9-17: previous definition
1088 ]])
1089
1090 AT_DATA([[input.y]],
1091 [[%define foo_bar "baz"
1092 %%
1093 start: ;
1094 ]])
1095 AT_BISON_CHECK([[input.y]], [[1]], [],
1096 [[input.y:1.9-15: %define variable `foo_bar' is not used
1097 ]])
1098
1099 AT_CLEANUP
1100
1101 ## ------------------------- ##
1102 ## Unused %define api.pure.  ##
1103 ## ------------------------- ##
1104
1105 AT_SETUP([[Unused %define api.pure]])
1106
1107 # AT_CHECK_API_PURE(DECLS, VALUE)
1108 # -------------------------------
1109 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
1110 # are specified.
1111 m4_define([AT_CHECK_API_PURE],
1112 [
1113 AT_DATA([[input.y]],
1114 [[%define api.pure ]$2[
1115 ]$1[
1116 %%
1117 start: ;
1118 ]])
1119
1120 AT_BISON_CHECK([[input.y]], [[1]], [],
1121 [[input.y:1.9-16: %define variable `api.pure' is not used
1122 ]])
1123 ])
1124
1125 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
1126 AT_CHECK_API_PURE([[%language "c++" %defines]], [[false]])
1127 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
1128 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[false]])
1129 AT_CHECK_API_PURE([[%language "java"]], [[true]])
1130 AT_CHECK_API_PURE([[%language "java"]], [[false]])
1131
1132 AT_CLEANUP
1133
1134 ## -------------------------------- ##
1135 ## C++ namespace reference errors.  ##
1136 ## -------------------------------- ##
1137
1138 AT_SETUP([[C++ namespace reference errors]])
1139
1140 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
1141 # -------------------------------------------------------------
1142 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
1143 m4_define([AT_CHECK_NAMESPACE_ERROR],
1144 [
1145 AT_DATA([[input.y]],
1146 [[%language "C++"
1147 %defines
1148 %define api.namespace "]$1["
1149 %%
1150 start: ;
1151 ]])
1152
1153 AT_BISON_CHECK([[input.y]], [1], [],
1154 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
1155 [[input.y:3.9-21: ]b4_arg[
1156 ]])])
1157 ])
1158
1159 AT_CHECK_NAMESPACE_ERROR([[]],
1160                          [[namespace reference is empty]])
1161 AT_CHECK_NAMESPACE_ERROR([[                             ]],
1162                          [[namespace reference is empty]])
1163 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
1164                          [[namespace reference has consecutive "::"]])
1165 AT_CHECK_NAMESPACE_ERROR([[foo::        ::bar]],
1166                          [[namespace reference has consecutive "::"]])
1167 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
1168                          [[namespace reference has consecutive "::"]])
1169 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
1170                          [[namespace reference has consecutive "::"]])
1171 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ::]],
1172                          [[namespace reference has consecutive "::"]],
1173                          [[namespace reference has a trailing "::"]])
1174 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
1175                          [[namespace reference has a trailing "::"]])
1176 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ]],
1177                          [[namespace reference has a trailing "::"]])
1178 AT_CHECK_NAMESPACE_ERROR([[::]],
1179                          [[namespace reference has a trailing "::"]])
1180
1181 AT_CLEANUP
1182
1183 ## ------------------------ ##
1184 ## Bad character literals.  ##
1185 ## ------------------------ ##
1186
1187 # Bison used to accept character literals that were empty or contained
1188 # too many characters.
1189
1190 # FIXME: AT_DATA or some variant of AT_DATA may eventually permit
1191 # the final newline to be omitted.  See the threads starting at
1192 # <http://lists.gnu.org/archive/html/bison-patches/2009-07/msg00019.html>.
1193
1194 AT_SETUP([[Bad character literals]])
1195
1196 AT_DATA([empty.y],
1197 [[%%
1198 start: '';
1199 start: '
1200 ]])
1201 AT_CHECK([[perl -e "print 'start: \'';" >> empty.y || exit 77]])
1202
1203 AT_BISON_CHECK([empty.y], [1], [],
1204 [[empty.y:2.8-9: warning: empty character literal
1205 empty.y:3.8-4.0: warning: empty character literal
1206 empty.y:3.8-4.0: missing `'' at end of line
1207 empty.y:4.8: warning: empty character literal
1208 empty.y:4.8: missing `'' at end of file
1209 ]])
1210
1211 AT_DATA([two.y],
1212 [[%%
1213 start: 'ab';
1214 start: 'ab
1215 ]])
1216 AT_CHECK([[perl -e "print 'start: \'ab';" >> two.y || exit 77]])
1217
1218 AT_BISON_CHECK([two.y], [1], [],
1219 [[two.y:2.8-11: warning: extra characters in character literal
1220 two.y:3.8-4.0: warning: extra characters in character literal
1221 two.y:3.8-4.0: missing `'' at end of line
1222 two.y:4.8-10: warning: extra characters in character literal
1223 two.y:4.8-10: missing `'' at end of file
1224 ]])
1225
1226 AT_DATA([three.y],
1227 [[%%
1228 start: 'abc';
1229 start: 'abc
1230 ]])
1231 AT_CHECK([[perl -e "print 'start: \'abc';" >> three.y || exit 77]])
1232
1233 AT_BISON_CHECK([three.y], [1], [],
1234 [[three.y:2.8-12: warning: extra characters in character literal
1235 three.y:3.8-4.0: warning: extra characters in character literal
1236 three.y:3.8-4.0: missing `'' at end of line
1237 three.y:4.8-11: warning: extra characters in character literal
1238 three.y:4.8-11: missing `'' at end of file
1239 ]])
1240
1241 AT_CLEANUP
1242
1243 ## ------------------------- ##
1244 ## Bad escapes in literals.  ##
1245 ## ------------------------- ##
1246
1247 AT_SETUP([[Bad escapes in literals]])
1248
1249 AT_DATA([input.y],
1250 [[%%
1251 start: '\777' '\0' '\xfff' '\x0'
1252        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
1253        '\ ' '\A';
1254 ]])
1255
1256 # It is not easy to create special characters, we cannot even trust tr.
1257 # Beside we cannot even expect "echo '\0'" to output two characters
1258 # (well three with \n): at least Bash 3.2 converts the two-character
1259 # sequence "\0" into a single NUL character.
1260 AT_CHECK([[perl -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
1261            || exit 77]])
1262
1263 AT_BISON_CHECK([input.y], [1], [],
1264 [[input.y:2.9-12: invalid number after \-escape: 777
1265 input.y:2.8-13: warning: empty character literal
1266 input.y:2.16-17: invalid number after \-escape: 0
1267 input.y:2.15-18: warning: empty character literal
1268 input.y:2.21-25: invalid number after \-escape: xfff
1269 input.y:2.20-26: warning: empty character literal
1270 input.y:2.29-31: invalid number after \-escape: x0
1271 input.y:2.28-32: warning: empty character literal
1272 input.y:3.9-14: invalid number after \-escape: uffff
1273 input.y:3.8-15: warning: empty character literal
1274 input.y:3.18-23: invalid number after \-escape: u0000
1275 input.y:3.17-24: warning: empty character literal
1276 input.y:3.27-36: invalid number after \-escape: Uffffffff
1277 input.y:3.26-37: warning: empty character literal
1278 input.y:3.40-49: invalid number after \-escape: U00000000
1279 input.y:3.39-50: warning: empty character literal
1280 input.y:4.9-10: invalid character after \-escape: ` '
1281 input.y:4.8-11: warning: empty character literal
1282 input.y:4.14-15: invalid character after \-escape: A
1283 input.y:4.13-16: warning: empty character literal
1284 input.y:5.9-16: invalid character after \-escape: \t
1285 input.y:5.17: invalid character after \-escape: \f
1286 input.y:5.18: invalid character after \-escape: \0
1287 input.y:5.19: invalid character after \-escape: \001
1288 ]])
1289
1290 AT_CLEANUP