tests/input.at

   1 # Checking the Bison scanner.                    -*- Autotest -*-
   2
   3 # Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   4 # Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 AT_BANNER([[Input Processing.]])
  20
  21 # Mostly test that we are robust to mistakes.
  22
  23
  24 ## ------------ ##
  25 ## Invalid $n.  ##
  26 ## ------------ ##
  27
  28 AT_SETUP([Invalid $n and @n])
  29
  30 AT_DATA([input.y],
  31 [[%%
  32 exp: { $$ = $1 ; };
  33 exp: { @$ = @1 ; };
  34 ]])
  35
  36 AT_BISON_CHECK([input.y], [1], [],
  37 [[input.y:2.13-14: integer out of range: `$1'
  38 input.y:3.13-14: integer out of range: `@1'
  39 ]])
  40
  41 AT_CLEANUP
  42
  43
  44 ## -------------- ##
  45 ## Type Clashes.  ##
  46 ## -------------- ##
  47
  48 AT_SETUP([Type Clashes])
  49
  50 AT_DATA([input.y],
  51 [[%union { int bar; }
  52 %token foo
  53 %type <bar> exp
  54 %%
  55 exp: foo { $$; } foo { $2; } foo
  56    | foo
  57    | /* Empty. */
  58    ;
  59 ]])
  60
  61 AT_BISON_CHECK([input.y], [1], [],
  62 [[input.y:5.12-13: $$ for the midrule at $2 of `exp' has no declared type
  63 input.y:5.24-25: $2 of `exp' has no declared type
  64 input.y:5.6-32: warning: type clash on default action: <bar> != <>
  65 input.y:6.6-8: warning: type clash on default action: <bar> != <>
  66 input.y:7.5: warning: empty rule for typed nonterminal, and no action
  67 ]])
  68
  69 AT_CLEANUP
  70
  71
  72 # _AT_UNUSED_VALUES_DECLARATIONS()
  73 # --------------------------------------------
  74 # Generate the token, type, and destructor
  75 # declarations for the unused values tests.
  76
  77 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
  78 [[[%token <integer> INT;
  79 %type <integer> a b c d e f g h i j k l;
  80 %destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
  81
  82
  83 # AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER, CHECK_MIDRULE_VALUES)
  84 # ------------------------------------------------------------------
  85 # Generate a grammar to test unused values,
  86 # compile it, run it.  If DECLARATIONS_AFTER
  87 # is set, then the token, type, and destructor
  88 # declarations are generated after the rules
  89 # rather than before.  If CHECK_MIDRULE_VALUES
  90 # is set, then --warnings=midrule-values is
  91 # set.
  92
  93 m4_define([AT_CHECK_UNUSED_VALUES],
  94 [AT_DATA([input.y],
  95 m4_ifval($1, [
  96
  97
  98 ], [_AT_UNUSED_VALUES_DECLARATIONS
  99 ])[[%%
 100 start:
 101   'a' a { $]2[; } | 'b' b { $]2[; } | 'c' c { $]2[; } | 'd' d { $]2[; }
 102 | 'e' e { $]2[; } | 'f' f { $]2[; } | 'g' g { $]2[; } | 'h' h { $]2[; }
 103 | 'i' i { $]2[; } | 'j' j { $]2[; } | 'k' k { $]2[; } | 'l' l { $]2[; }
 104 ;
 105
 106 a: INT | INT { } INT { } INT { };
 107 b: INT | /* empty */;
 108 c: INT | INT { $]1[; } INT { $<integer>2; } INT { $<integer>4; };
 109 d: INT | INT { } INT { $]1[; } INT { $<integer>2; };
 110 e: INT | INT { } INT {  } INT { $]1[; };
 111 f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
 112 g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
 113 h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
 114 i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
 115 j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
 116 k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
 117 l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
 118 _AT_UNUSED_VALUES_DECLARATIONS])
 119 )
 120
 121 AT_BISON_CHECK(m4_ifval($2, [ --warnings=midrule-values ])[ input.y], [0], [],
 122 [[input.y:11.10-32: warning: unset value: $]$[
 123 input.y:11.10-32: warning: unused value: $]1[
 124 input.y:11.10-32: warning: unused value: $]3[
 125 input.y:11.10-32: warning: unused value: $]5[
 126 input.y:12.9: warning: empty rule for typed nonterminal, and no action
 127 ]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $$
 128 input.y:13.26-41: warning: unset value: $$
 129 ]]])[[input.y:13.10-62: warning: unset value: $]$[
 130 input.y:13.10-62: warning: unused value: $]3[
 131 input.y:13.10-62: warning: unused value: $]5[
 132 ]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
 133 ]]])[[input.y:14.10-49: warning: unset value: $]$[
 134 input.y:14.10-49: warning: unused value: $]3[
 135 input.y:14.10-49: warning: unused value: $]5[
 136 input.y:15.10-37: warning: unset value: $]$[
 137 input.y:15.10-37: warning: unused value: $]3[
 138 input.y:15.10-37: warning: unused value: $]5[
 139 input.y:17.10-58: warning: unset value: $]$[
 140 input.y:17.10-58: warning: unused value: $]1[
 141 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
 142 ]]])[[input.y:17.10-58: warning: unused value: $]3[
 143 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[
 144 ]]])[[input.y:17.10-58: warning: unused value: $]5[
 145 input.y:18.10-72: warning: unset value: $]$[
 146 input.y:18.10-72: warning: unused value: $]1[
 147 input.y:18.10-72: warning: unused value: $]3[
 148 ]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
 149 ]]])[[input.y:18.10-72: warning: unused value: $]5[
 150 ]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[
 151 ]]])[[input.y:21.10-68: warning: unset value: $]$[
 152 input.y:21.10-68: warning: unused value: $]1[
 153 input.y:21.10-68: warning: unused value: $]2[
 154 ]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
 155 ]]]))])
 156
 157
 158 ## --------------- ##
 159 ## Unused values.  ##
 160 ## --------------- ##
 161
 162 AT_SETUP([Unused values])
 163 AT_CHECK_UNUSED_VALUES
 164 AT_CHECK_UNUSED_VALUES(, [1])
 165 AT_CLEANUP
 166
 167
 168 ## ------------------------------------------ ##
 169 ## Unused values before symbol declarations.  ##
 170 ## ------------------------------------------ ##
 171
 172 AT_SETUP([Unused values before symbol declarations])
 173 AT_CHECK_UNUSED_VALUES([1])
 174 AT_CHECK_UNUSED_VALUES([1], [1])
 175 AT_CLEANUP
 176
 177
 178 ## --------------------------------------------- ##
 179 ## Default %printer and %destructor redeclared.  ##
 180 ## --------------------------------------------- ##
 181
 182 AT_SETUP([Default %printer and %destructor redeclared])
 183
 184 AT_DATA([[input.y]],
 185 [[%destructor { destroy ($$); } <*> <*>
 186 %printer { destroy ($$); } <*> <*>
 187
 188 %destructor { destroy ($$); } <*>
 189 %printer { destroy ($$); } <*>
 190
 191 %destructor { destroy ($$); } <> <>
 192 %printer { destroy ($$); } <> <>
 193
 194 %destructor { destroy ($$); } <>
 195 %printer { destroy ($$); } <>
 196
 197 %%
 198
 199 start: ;
 200
 201 %destructor { destroy ($$); } <*>;
 202 %printer { destroy ($$); } <*>;
 203
 204 %destructor { destroy ($$); } <>;
 205 %printer { destroy ($$); } <>;
 206 ]])
 207
 208 AT_BISON_CHECK([input.y], [1], [],
 209 [[input.y:1.13-29: redeclaration for default tagged %destructor
 210 input.y:1.13-29: previous declaration
 211 input.y:2.10-26: redeclaration for default tagged %printer
 212 input.y:2.10-26: previous declaration
 213 input.y:4.13-29: redeclaration for default tagged %destructor
 214 input.y:1.13-29: previous declaration
 215 input.y:5.10-26: redeclaration for default tagged %printer
 216 input.y:2.10-26: previous declaration
 217 input.y:7.13-29: redeclaration for default tagless %destructor
 218 input.y:7.13-29: previous declaration
 219 input.y:8.10-26: redeclaration for default tagless %printer
 220 input.y:8.10-26: previous declaration
 221 input.y:10.13-29: redeclaration for default tagless %destructor
 222 input.y:7.13-29: previous declaration
 223 input.y:11.10-26: redeclaration for default tagless %printer
 224 input.y:8.10-26: previous declaration
 225 input.y:17.13-29: redeclaration for default tagged %destructor
 226 input.y:4.13-29: previous declaration
 227 input.y:18.10-26: redeclaration for default tagged %printer
 228 input.y:5.10-26: previous declaration
 229 input.y:20.13-29: redeclaration for default tagless %destructor
 230 input.y:10.13-29: previous declaration
 231 input.y:21.10-26: redeclaration for default tagless %printer
 232 input.y:11.10-26: previous declaration
 233 ]])
 234
 235 AT_CLEANUP
 236
 237
 238 ## ---------------------------------------------- ##
 239 ## Per-type %printer and %destructor redeclared.  ##
 240 ## ---------------------------------------------- ##
 241
 242 AT_SETUP([Per-type %printer and %destructor redeclared])
 243
 244 AT_DATA([[input.y]],
 245 [[%destructor { destroy ($$); } <field1> <field2>
 246 %printer { destroy ($$); } <field1> <field2>
 247
 248 %destructor { destroy ($$); } <field1> <field1>
 249 %printer { destroy ($$); } <field2> <field2>
 250
 251 %%
 252
 253 start: ;
 254
 255 %destructor { destroy ($$); } <field2> <field1>;
 256 %printer { destroy ($$); } <field2> <field1>;
 257 ]])
 258
 259 AT_BISON_CHECK([input.y], [1], [],
 260 [[input.y:4.13-29: %destructor redeclaration for <field1>
 261 input.y:1.13-29: previous declaration
 262 input.y:4.13-29: %destructor redeclaration for <field1>
 263 input.y:4.13-29: previous declaration
 264 input.y:5.10-26: %printer redeclaration for <field2>
 265 input.y:2.10-26: previous declaration
 266 input.y:5.10-26: %printer redeclaration for <field2>
 267 input.y:5.10-26: previous declaration
 268 input.y:11.13-29: %destructor redeclaration for <field1>
 269 input.y:4.13-29: previous declaration
 270 input.y:11.13-29: %destructor redeclaration for <field2>
 271 input.y:1.13-29: previous declaration
 272 input.y:12.10-26: %printer redeclaration for <field1>
 273 input.y:2.10-26: previous declaration
 274 input.y:12.10-26: %printer redeclaration for <field2>
 275 input.y:5.10-26: previous declaration
 276 ]])
 277
 278 AT_CLEANUP
 279
 280
 281 ## ---------------------------------------- ##
 282 ## Unused values with default %destructor.  ##
 283 ## ---------------------------------------- ##
 284
 285 AT_SETUP([Unused values with default %destructor])
 286
 287 AT_DATA([[input.y]],
 288 [[%destructor { destroy ($$); } <>
 289 %type <tag> tagged
 290
 291 %%
 292
 293 start: end end tagged tagged { $<tag>1; $3; } ;
 294 end: { } ;
 295 tagged: { } ;
 296 ]])
 297
 298 AT_BISON_CHECK([input.y], [0], [],
 299 [[input.y:6.8-45: warning: unset value: $$
 300 input.y:6.8-45: warning: unused value: $2
 301 input.y:7.6-8: warning: unset value: $$
 302 ]])
 303
 304 AT_DATA([[input.y]],
 305 [[%destructor { destroy ($$); } <*>
 306 %type <tag> tagged
 307
 308 %%
 309
 310 start: end end tagged tagged { $<tag>1; $3; } ;
 311 end: { } ;
 312 tagged: { } ;
 313 ]])
 314
 315 AT_BISON_CHECK([input.y], [0], [],
 316 [[input.y:6.8-45: warning: unused value: $4
 317 input.y:8.9-11: warning: unset value: $$
 318 ]])
 319
 320 AT_CLEANUP
 321
 322
 323 ## ----------------------------------------- ##
 324 ## Unused values with per-type %destructor.  ##
 325 ## ----------------------------------------- ##
 326
 327 AT_SETUP([Unused values with per-type %destructor])
 328
 329 AT_DATA([[input.y]],
 330 [[%destructor { destroy ($$); } <field1>
 331 %type <field1> start end
 332
 333 %%
 334
 335 start: end end { $1; } ;
 336 end: { }  ;
 337 ]])
 338
 339 AT_BISON_CHECK([input.y], [0], [],
 340 [[input.y:6.8-22: warning: unset value: $$
 341 input.y:6.8-22: warning: unused value: $2
 342 input.y:7.6-8: warning: unset value: $$
 343 ]])
 344
 345 AT_CLEANUP
 346
 347
 348 ## ---------------------- ##
 349 ## Incompatible Aliases.  ##
 350 ## ---------------------- ##
 351
 352 AT_SETUP([Incompatible Aliases])
 353
 354 AT_DATA([input.y],
 355 [[%token foo "foo"
 356
 357 %type <bar>       foo
 358 %printer {bar}    foo
 359 %destructor {bar} foo
 360 %left             foo
 361
 362 %type <baz>       "foo"
 363 %printer {baz}    "foo"
 364 %destructor {baz} "foo"
 365 %left             "foo"
 366
 367 %%
 368 exp: foo;
 369 ]])
 370
 371 AT_BISON_CHECK([input.y], [1], [],
 372 [[input.y:8.7-11: %type redeclaration for foo
 373 input.y:3.7-11: previous declaration
 374 input.y:10.13-17: %destructor redeclaration for foo
 375 input.y:5.13-17: previous declaration
 376 input.y:9.10-14: %printer redeclaration for foo
 377 input.y:4.10-14: previous declaration
 378 input.y:11.1-5: %left redeclaration for foo
 379 input.y:6.1-5: previous declaration
 380 ]])
 381
 382 AT_CLEANUP
 383
 384
 385
 386 ## ----------------------- ##
 387 ## Torturing the Scanner.  ##
 388 ## ----------------------- ##
 389
 390 # Be sure to compile and run, so that the C compiler checks what
 391 # we do.
 392
 393 AT_SETUP([Torturing the Scanner])
 394
 395
 396 AT_DATA([input.y], [])
 397 AT_BISON_CHECK([input.y], [1], [],
 398 [[input.y:1.1: syntax error, unexpected end of file
 399 ]])
 400
 401
 402 AT_DATA([input.y],
 403 [{}
 404 ])
 405 AT_BISON_CHECK([input.y], [1], [],
 406 [[input.y:1.1-2: syntax error, unexpected {...}
 407 ]])
 408
 409
 410 AT_DATA_GRAMMAR([input.y],
 411 [[%{
 412 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 413 const char *foo = "So %{ and %} can be here too.";
 414
 415 #if 0
 416 /* These examples test Bison while not stressing C compilers too much.
 417    Many C compilers mishandle backslash-newlines, so this part of the
 418    test is inside "#if 0".  The comment and string are written so that
 419    the "#endif" will be seen regardless of the C compiler bugs that we
 420    know about, namely:
 421
 422      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 423      comment.
 424
 425      The Apple Darwin compiler (as of late 2002) mishandles
 426      \\[newline]' within a character constant.
 427
 428    */
 429
 430 /\
 431 * A comment with backslash-newlines in it. %} *\
 432 \
 433 /
 434 /* { Close the above comment, if the C compiler mishandled it.  */
 435
 436 char str[] = "\\
 437 " A string with backslash-newlines in it %{ %} \\
 438 \
 439 "";
 440
 441 char apostrophe = '\'';
 442 #endif
 443
 444 #include <stdio.h>
 445 #include <stdlib.h>
 446 %}
 447 /* %{ and %} can be here too. */
 448
 449 %{
 450 /* Exercise pre-prologue dependency to %union.  */
 451 typedef int value;
 452 %}
 453
 454 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 455
 456 /* Also exercise %union. */
 457 %union
 458 {
 459   value ival; /* A comment to exercise an old bug. */
 460 };
 461
 462
 463 /* Exercise post-prologue dependency to %union.  */
 464 %{
 465 static YYSTYPE value_as_yystype (value val);
 466
 467 /* Exercise quotes in declarations.  */
 468 char quote[] = "@:>@@:>@,";
 469 %}
 470
 471 %{
 472 static void yyerror (const char *s);
 473 static int yylex (void);
 474 %}
 475
 476 %type <ival> '@<:@'
 477
 478 /* Exercise quotes in strings.  */
 479 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 480
 481 %%
 482 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 483 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 484   {
 485     /* Exercise quotes in braces.  */
 486     char tmp[] = "@<:@%c@:>@,\n";
 487     printf (tmp, $1);
 488   }
 489 ;
 490
 491 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 492 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 493 output.or.oline.opt: ;|oline;;|output;;;
 494 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 495 %%
 496 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 497
 498 static YYSTYPE
 499 value_as_yystype (value val)
 500 {
 501   YYSTYPE res;
 502   res.ival = val;
 503   return res;
 504 }
 505
 506 static int
 507 yylex (void)
 508 {
 509   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
 510 #output "; /* "
 511   */
 512   static size_t toknum;
 513   if (! (toknum < sizeof input))
 514     abort ();
 515   yylval = value_as_yystype (input[toknum]);
 516   return input[toknum++];
 517 }
 518
 519 static void
 520 yyerror (const char *msg)
 521 {
 522   fprintf (stderr, "%s\n", msg);
 523 }
 524 ]])
 525
 526 # Pacify Emacs'font-lock-mode: "
 527
 528 AT_DATA([main.c],
 529 [[typedef int value;
 530 #include "input.h"
 531
 532 int yyparse (void);
 533
 534 int
 535 main (void)
 536 {
 537   return yyparse ();
 538 }
 539 ]])
 540
 541 AT_BISON_CHECK([-d -v -o input.c input.y])
 542 AT_COMPILE([input.o], [-c input.c])
 543 AT_COMPILE([main.o], [-c main.c])
 544 AT_COMPILE([input], [input.o main.o])
 545 AT_PARSER_CHECK([./input], 0,
 546 [[[@<:@],
 547 ]])
 548
 549 AT_CLEANUP
 550
 551
 552 ## ---------------------- ##
 553 ## Typed symbol aliases.  ##
 554 ## ---------------------- ##
 555
 556 AT_SETUP([Typed symbol aliases])
 557
 558 # Bison 2.0 broke typed symbol aliases - ensure they work.
 559
 560 AT_DATA_GRAMMAR([input.y],
 561 [[%union
 562 {
 563   int val;
 564 };
 565 %token <val> MY_TOKEN "MY TOKEN"
 566 %type <val> exp
 567 %%
 568 exp: "MY TOKEN";
 569 %%
 570 ]])
 571
 572 AT_BISON_CHECK([-o input.c input.y])
 573
 574 AT_CLEANUP
 575
 576
 577 ## --------- ##
 578 ## Require.  ##
 579 ## --------- ##
 580
 581 m4_define([AT_CHECK_REQUIRE],
 582 [AT_SETUP([Require $1])
 583 AT_DATA_GRAMMAR([input.y],
 584 [[%require "$1";
 585 %%
 586 empty_file:;
 587 ]])
 588 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
 589 AT_CLEANUP
 590 ])
 591
 592 AT_CHECK_REQUIRE(1.0, 0)
 593 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 594 ## FIXME: Some day augment this version number.
 595 AT_CHECK_REQUIRE(100.0, 63)
 596
 597
 598 ## ------------------------------------- ##
 599 ## String aliases for character tokens.  ##
 600 ## ------------------------------------- ##
 601
 602 AT_SETUP([String aliases for character tokens])
 603
 604 # Bison once thought a character token and its alias were different symbols
 605 # with the same user token number.
 606
 607 AT_DATA_GRAMMAR([input.y],
 608 [[%token 'a' "a"
 609 %%
 610 start: 'a';
 611 %%
 612 ]])
 613
 614 AT_BISON_CHECK([-o input.c input.y])
 615
 616 AT_CLEANUP
 617
 618
 619 ## -------------- ##
 620 ## Symbol names.  ##
 621 ## -------------- ##
 622
 623 AT_SETUP([Symbols])
 624
 625 AT_DATA_GRAMMAR([input.y],
 626 [[%token WITH-DASH
 627 %token WITHOUT_DASH "WITHOUT-DASH"
 628 %token WITH.PERIOD
 629 %token WITHOUT_PERIOD "WITHOUT.PERIOD"
 630 %code {
 631   void yyerror (char const *);
 632   int yylex (void);
 633 }
 634 %%
 635 start: with-dash without_dash with.period without_period;
 636 with-dash: WITH-DASH;
 637 without_dash: "WITHOUT-DASH";
 638 with.period: WITH.PERIOD;
 639 without_period: "WITHOUT.PERIOD";
 640 %%
 641 ]])
 642
 643 # POSIX Yacc accept periods, but not dashes.
 644 AT_BISON_CHECK([--yacc input.y], [1], [],
 645 [[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 646 input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
 647 ]])
 648
 649 # So warn about them.
 650 AT_BISON_CHECK([-Wyacc input.y], [], [],
 651 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
 652 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
 653 ]])
 654
 655 # Dashes are fine for GNU Bison.
 656 AT_BISON_CHECK([-o input.c input.y])
 657
 658 # Make sure we don't export silly token identifiers with periods or dashes.
 659 AT_COMPILE([input.o], [-c input.c])
 660
 661
 662 # Periods and dashes are genuine letters, they can start identifiers.
 663 # Digits cannot.
 664 AT_DATA_GRAMMAR([input.y],
 665 [[%token .GOOD
 666          -GOOD
 667          1NV4L1D
 668 %%
 669 start: .GOOD -GOOD
 670 ]])
 671 AT_BISON_CHECK([-o input.c input.y], [1], [],
 672 [[input.y:11.10-16: invalid identifier: `1NV4L1D'
 673 ]])
 674
 675 AT_CLEANUP
 676
 677
 678 ## ----------------- ##
 679 ## Numbered tokens.  ##
 680 ## ----------------- ##
 681
 682 AT_SETUP([Numbered tokens])
 683
 684 AT_DATA_GRAMMAR([redecl.y],
 685 [[%token DECIMAL_1     11259375
 686          HEXADECIMAL_1 0xabcdef
 687          HEXADECIMAL_2 0xFEDCBA
 688          DECIMAL_2     16702650
 689 %%
 690 start: DECIMAL_1 HEXADECIMAL_2;
 691 ]])
 692
 693 AT_BISON_CHECK([redecl.y], [1], [],
 694 [[redecl.y:10.10-22: user token number 11259375 redeclaration for HEXADECIMAL_1
 695 redecl.y:9.8-16: previous declaration for DECIMAL_1
 696 redecl.y:12.10-18: user token number 16702650 redeclaration for DECIMAL_2
 697 redecl.y:11.10-22: previous declaration for HEXADECIMAL_2
 698 ]])
 699
 700 AT_DATA_GRAMMAR([too-large.y],
 701 [[%token TOO_LARGE_DEC 999999999999999999999
 702          TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
 703 %%
 704 start: TOO_LARGE_DEC TOO_LARGE_HEX
 705 %%
 706 ]])
 707
 708 AT_BISON_CHECK([too-large.y], [1], [],
 709 [[too-large.y:9.22-42: integer out of range: `999999999999999999999'
 710 too-large.y:10.24-44: integer out of range: `0xFFFFFFFFFFFFFFFFFFF'
 711 ]])
 712
 713 AT_CLEANUP
 714
 715
 716 ## --------------------- ##
 717 ## Unclosed constructs.  ##
 718 ## --------------------- ##
 719
 720 AT_SETUP([Unclosed constructs])
 721
 722 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
 723 # they were prepended to whatever it STRING_GROW'ed next.  It also threw them
 724 # away rather than returning them to the parser.  The effect was confusing
 725 # subsequent error messages.
 726
 727 AT_DATA([input.y],
 728 [[%token A "a
 729 %token B "b"
 730 %token AB "ab" // Used to complain that "ab" was already used.
 731 %token C '1
 732 %token TWO "2"
 733 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
 734
 735 %%
 736
 737 start: ;
 738
 739 // Used to report a syntax error because it didn't see any kind of symbol
 740 // identifier.
 741 %type <f> 'a
 742 ;
 743 %type <f> "a
 744 ;
 745 // Used to report a syntax error because it didn't see braced code.
 746 %destructor { free ($$)
 747 ]])
 748
 749 AT_BISON_CHECK([-o input.c input.y], 1, [],
 750 [[input.y:1.10-2.0: missing `"' at end of line
 751 input.y:4.10-5.0: missing `'' at end of line
 752 input.y:14.11-15.0: missing `'' at end of line
 753 input.y:16.11-17.0: missing `"' at end of line
 754 input.y:19.13-20.0: missing `}' at end of file
 755 input.y:20.1: syntax error, unexpected end of file
 756 ]])
 757
 758 AT_CLEANUP
 759
 760
 761 ## ------------------------- ##
 762 ## %start after first rule.  ##
 763 ## ------------------------- ##
 764
 765 AT_SETUP([%start after first rule])
 766
 767 # Bison once complained that a %start after the first rule was a redeclaration
 768 # of the start symbol.
 769
 770 AT_DATA([input.y],
 771 [[%%
 772 false_start: ;
 773 start: false_start ;
 774 %start start;
 775 ]])
 776
 777 AT_BISON_CHECK([-o input.c input.y])
 778
 779 AT_CLEANUP
 780
 781
 782 ## --------------------- ##
 783 ## %prec takes a token.  ##
 784 ## --------------------- ##
 785
 786 AT_SETUP([%prec takes a token])
 787
 788 # Bison once allowed %prec sym where sym was a nonterminal.
 789
 790 AT_DATA([input.y],
 791 [[%%
 792 start: PREC %prec PREC ;
 793 PREC: ;
 794 ]])
 795
 796 AT_BISON_CHECK([input.y], [1], [],
 797 [[input.y:3.1-4: rule given for PREC, which is a token
 798 ]])
 799
 800 AT_CLEANUP
 801
 802
 803 ## ------------------------------- ##
 804 ## %prec's token must be defined.  ##
 805 ## ------------------------------- ##
 806
 807 AT_SETUP([[%prec's token must be defined]])
 808
 809 # According to POSIX, a %prec token must be defined separately.
 810
 811 AT_DATA([[input.y]],
 812 [[%%
 813 start: %prec PREC ;
 814 ]])
 815
 816 AT_BISON_CHECK([[input.y]], [[0]], [],
 817 [[input.y:2.8-17: warning: token for %prec is not defined: PREC
 818 ]])
 819
 820 AT_CLEANUP
 821
 822
 823 ## -------------------------------- ##
 824 ## Reject unused %code qualifiers.  ##
 825 ## -------------------------------- ##
 826
 827 AT_SETUP([Reject unused %code qualifiers])
 828
 829 AT_DATA([input-c.y],
 830 [[%code q {}
 831 %code bad {}
 832 %code bad {}
 833 %code format {}
 834 %%
 835 start: ;
 836 ]])
 837 AT_BISON_CHECK([[input-c.y]], [[1]], [],
 838 [[input-c.y:1.7: %code qualifier `q' is not used
 839 input-c.y:2.7-9: %code qualifier `bad' is not used
 840 input-c.y:3.7-9: %code qualifier `bad' is not used
 841 input-c.y:4.7-12: %code qualifier `format' is not used
 842 ]])
 843
 844 AT_DATA([input-c-glr.y],
 845 [[%code q {}
 846 %code bad {}
 847  %code bad {}
 848 %%
 849 start: ;
 850 ]])
 851 AT_BISON_CHECK([[input-c-glr.y]], [[1]], [],
 852 [[input-c-glr.y:1.7: %code qualifier `q' is not used
 853 input-c-glr.y:2.7-9: %code qualifier `bad' is not used
 854 input-c-glr.y:3.8-10: %code qualifier `bad' is not used
 855 ]])
 856
 857 AT_DATA([input-c++.y],
 858 [[%code q {}
 859 %code bad {}
 860  %code q {}
 861 %%
 862 start: ;
 863 ]])
 864 AT_BISON_CHECK([[input-c++.y]], [[1]], [],
 865 [[input-c++.y:1.7: %code qualifier `q' is not used
 866 input-c++.y:2.7-9: %code qualifier `bad' is not used
 867 input-c++.y:3.8: %code qualifier `q' is not used
 868 ]])
 869
 870 AT_DATA([input-c++-glr.y],
 871 [[%code bad {}
 872 %code q {}
 873 %code q {}
 874 %%
 875 start: ;
 876 ]])
 877 AT_BISON_CHECK([[input-c++-glr.y]], [[1]], [],
 878 [[input-c++-glr.y:1.7-9: %code qualifier `bad' is not used
 879 input-c++-glr.y:2.7: %code qualifier `q' is not used
 880 input-c++-glr.y:3.7: %code qualifier `q' is not used
 881 ]])
 882
 883 AT_DATA([special-char-@@.y],
 884 [[%code bad {}
 885 %code q {}
 886 %code q {}
 887 %%
 888 start: ;
 889 ]])
 890 AT_BISON_CHECK([[special-char-@@.y]], [[1]], [],
 891 [[special-char-@@.y:1.7-9: %code qualifier `bad' is not used
 892 special-char-@@.y:2.7: %code qualifier `q' is not used
 893 special-char-@@.y:3.7: %code qualifier `q' is not used
 894 ]])
 895
 896 AT_DATA([special-char-@:>@.y],
 897 [[%code bad {}
 898 %code q {}
 899 %code q {}
 900 %%
 901 start: ;
 902 ]])
 903 AT_BISON_CHECK([[special-char-@:>@.y]], [[1]], [],
 904 [[special-char-@:>@.y:1.7-9: %code qualifier `bad' is not used
 905 special-char-@:>@.y:2.7: %code qualifier `q' is not used
 906 special-char-@:>@.y:3.7: %code qualifier `q' is not used
 907 ]])
 908
 909 AT_CLEANUP
 910
 911
 912 ## ---------------- ##
 913 ## %define errors.  ##
 914 ## ---------------- ##
 915
 916 AT_SETUP([%define errors])
 917
 918 AT_DATA([input-redefined.y],
 919 [[%define var "value1"
 920 %define var "value1"
 921  %define var "value2"
 922 %define special1 "@:>@"
 923 %define special2 "@<:@"
 924 %%
 925 start: ;
 926 ]])
 927
 928 AT_BISON_CHECK([[input-redefined.y]], [[1]], [],
 929 [[input-redefined.y:2.9-11: %define variable `var' redefined
 930 input-redefined.y:1.9-11: previous definition
 931 input-redefined.y:3.10-12: %define variable `var' redefined
 932 input-redefined.y:2.9-11: previous definition
 933 ]])
 934
 935 AT_DATA([input-unused.y],
 936 [[%define var "value"
 937 %%
 938 start: ;
 939 ]])
 940
 941 AT_BISON_CHECK([[input-unused.y]], [[1]], [],
 942 [[input-unused.y:1.9-11: %define variable `var' is not used
 943 ]])
 944
 945 AT_CLEANUP
 946
 947
 948 ## ----------------------------------- ##
 949 ## %define, --define, --force-define.  ##
 950 ## ----------------------------------- ##
 951
 952 AT_SETUP([[%define, --define, --force-define]])
 953
 954 AT_DATA([[skel.c]],
 955 [[m4@&t@_divert_push(0)@
 956 @output(b4_parser_file_name@)@
 957 [var-dd: ]b4_percent_define_get([[var-dd]])[
 958 var-ff: ]b4_percent_define_get([[var-ff]])[
 959 var-dfg: ]b4_percent_define_get([[var-dfg]])[
 960 var-fd: ]b4_percent_define_get([[var-fd]])
 961 m4@&t@_divert_pop(0)
 962 ]])
 963 AT_DATA([[input.y]],
 964 [[%define var-dfg "gram"
 965 %%
 966 start: ;
 967 ]])
 968 AT_BISON_CHECK([[-Dvar-dd=cmd-d1 -Dvar-dd=cmd-d2 \
 969                  -Fvar-ff=cmd-f1 -Fvar-ff=cmd-f2 \
 970                  -Dvar-dfg=cmd-d -Fvar-dfg=cmd-f \
 971                  -Fvar-fd=cmd-f -Dvar-fd=cmd-d   \
 972                  --skeleton ./skel.c input.y]])
 973 AT_CHECK([[cat input.tab.c]], [[0]],
 974 [[var-dd: cmd-d2
 975 var-ff: cmd-f2
 976 var-dfg: cmd-f
 977 var-fd: cmd-d
 978 ]])
 979
 980 AT_DATA([[input-dg.y]],
 981 [[%define var "gram"
 982 %%
 983 start: ;
 984 ]])
 985 AT_BISON_CHECK([[-Dvar=cmd-d input-dg.y]], [[1]], [],
 986 [[input-dg.y:1.9-11: %define variable `var' redefined
 987 <command line>:2: previous definition
 988 ]])
 989
 990 AT_DATA([[input-unused.y]],
 991 [[%%
 992 start: ;
 993 ]])
 994 AT_BISON_CHECK([[-Dunused-d -Funused-f input-unused.y]], [[1]], [],
 995 [[<command line>:2: %define variable `unused-d' is not used
 996 <command line>:3: %define variable `unused-f' is not used
 997 ]])
 998
 999 AT_CLEANUP
1000
1001 ## --------------------------- ##
1002 ## %define Boolean variables.  ##
1003 ## --------------------------- ##
1004
1005 AT_SETUP([[%define Boolean variables]])
1006
1007 AT_DATA([Input.y],
1008 [[%language "Java"
1009 %define public "maybe"
1010 %define parser_class_name "Input"
1011 %%
1012 start: ;
1013 ]])
1014
1015 AT_BISON_CHECK([[Input.y]], [1], [],
1016 [[Input.y:2.9-14: invalid value for %define Boolean variable `public'
1017 ]])
1018
1019 AT_CLEANUP
1020
1021 ## ------------------------ ##
1022 ## %define enum variables.  ##
1023 ## ------------------------ ##
1024
1025 AT_SETUP([[%define enum variables]])
1026
1027 # Front-end.
1028 AT_DATA([[input.y]],
1029 [[%define lr.default-reductions bogus
1030 %%
1031 start: ;
1032 ]])
1033 AT_BISON_CHECK([[input.y]], [[1]], [[]],
1034 [[input.y:1.9-29: invalid value for %define variable `lr.default-reductions': `bogus'
1035 input.y:1.9-29: accepted value: `all'
1036 input.y:1.9-29: accepted value: `consistent'
1037 input.y:1.9-29: accepted value: `accepting'
1038 ]])
1039
1040 # Back-end.
1041 AT_DATA([[input.y]],
1042 [[%define api.push-pull neither
1043 %%
1044 start: ;
1045 ]])
1046 AT_BISON_CHECK([[input.y]], [1], [],
1047 [[input.y:1.9-21: invalid value for %define variable `api.push-pull': `neither'
1048 input.y:1.9-21: accepted value: `pull'
1049 input.y:1.9-21: accepted value: `push'
1050 input.y:1.9-21: accepted value: `both'
1051 ]])
1052
1053 AT_CLEANUP
1054
1055 ## -------------------------------- ##
1056 ## %define backward compatibility.  ##
1057 ## -------------------------------- ##
1058
1059 AT_SETUP([[%define backward compatibility]])
1060
1061 # The error messages tell us whether underscores in these variables are
1062 # being converted to dashes.
1063
1064 AT_DATA([[input.y]],
1065 [[%define api.push_pull "neither"
1066 %%
1067 start: ;
1068 ]])
1069 AT_BISON_CHECK([[input.y]], [1], [],
1070 [[input.y:1.9-21: invalid value for %define variable `api.push-pull': `neither'
1071 input.y:1.9-21: accepted value: `pull'
1072 input.y:1.9-21: accepted value: `push'
1073 input.y:1.9-21: accepted value: `both'
1074 ]])
1075
1076 AT_DATA([[input.y]],
1077 [[%define lr.keep_unreachable_states maybe
1078 %%
1079 start: ;
1080 ]])
1081 AT_BISON_CHECK([[input.y]], [1], [],
1082 [[input.y:1.9-34: invalid value for %define Boolean variable `lr.keep-unreachable-states'
1083 ]])
1084
1085 AT_DATA([[input.y]],
1086 [[%define foo_bar "baz"
1087 %%
1088 start: ;
1089 ]])
1090 AT_BISON_CHECK([[input.y]], [[1]], [],
1091 [[input.y:1.9-15: %define variable `foo_bar' is not used
1092 ]])
1093
1094 AT_CLEANUP
1095
1096 ## ------------------------- ##
1097 ## Unused %define api.pure.  ##
1098 ## ------------------------- ##
1099
1100 AT_SETUP([[Unused %define api.pure]])
1101
1102 # AT_CHECK_API_PURE(DECLS, VALUE)
1103 # -------------------------------
1104 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
1105 # are specified.
1106 m4_define([AT_CHECK_API_PURE],
1107 [
1108 AT_DATA([[input.y]],
1109 [[%define api.pure ]$2[
1110 ]$1[
1111 %%
1112 start: ;
1113 ]])
1114
1115 AT_BISON_CHECK([[input.y]], [[1]], [],
1116 [[input.y:1.9-16: %define variable `api.pure' is not used
1117 ]])
1118 ])
1119
1120 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
1121 AT_CHECK_API_PURE([[%language "c++" %defines]], [[false]])
1122 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
1123 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[false]])
1124 AT_CHECK_API_PURE([[%language "java"]], [[true]])
1125 AT_CHECK_API_PURE([[%language "java"]], [[false]])
1126
1127 AT_CLEANUP
1128
1129 ## -------------------------------- ##
1130 ## C++ namespace reference errors.  ##
1131 ## -------------------------------- ##
1132
1133 AT_SETUP([[C++ namespace reference errors]])
1134
1135 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
1136 # -------------------------------------------------------------
1137 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
1138 m4_define([AT_CHECK_NAMESPACE_ERROR],
1139 [
1140 AT_DATA([[input.y]],
1141 [[%language "C++"
1142 %defines
1143 %define namespace "]$1["
1144 %%
1145 start: ;
1146 ]])
1147
1148 AT_BISON_CHECK([[input.y]], [1], [],
1149 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
1150 [[input.y:3.9-17: ]b4_arg[
1151 ]])])
1152 ])
1153
1154 AT_CHECK_NAMESPACE_ERROR([[]],
1155                          [[namespace reference is empty]])
1156 AT_CHECK_NAMESPACE_ERROR([[                             ]],
1157                          [[namespace reference is empty]])
1158 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
1159                          [[namespace reference has consecutive "::"]])
1160 AT_CHECK_NAMESPACE_ERROR([[foo::        ::bar]],
1161                          [[namespace reference has consecutive "::"]])
1162 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
1163                          [[namespace reference has consecutive "::"]])
1164 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
1165                          [[namespace reference has consecutive "::"]])
1166 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ::]],
1167                          [[namespace reference has consecutive "::"]],
1168                          [[namespace reference has a trailing "::"]])
1169 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
1170                          [[namespace reference has a trailing "::"]])
1171 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ]],
1172                          [[namespace reference has a trailing "::"]])
1173 AT_CHECK_NAMESPACE_ERROR([[::]],
1174                          [[namespace reference has a trailing "::"]])
1175
1176 AT_CLEANUP
1177
1178 ## ------------------------ ##
1179 ## Bad character literals.  ##
1180 ## ------------------------ ##
1181
1182 # Bison used to accept character literals that were empty or contained
1183 # too many characters.
1184
1185 # FIXME: AT_DATA or some variant of AT_DATA may eventually permit
1186 # the final newline to be omitted.  See the threads starting at
1187 # <http://lists.gnu.org/archive/html/bison-patches/2009-07/msg00019.html>.
1188
1189 AT_SETUP([[Bad character literals]])
1190
1191 AT_DATA([empty.y],
1192 [[%%
1193 start: '';
1194 start: '
1195 ]])
1196 AT_CHECK([[perl -e "print 'start: \'';" >> empty.y || exit 77]])
1197
1198 AT_BISON_CHECK([empty.y], [1], [],
1199 [[empty.y:2.8-9: warning: empty character literal
1200 empty.y:3.8-4.0: warning: empty character literal
1201 empty.y:3.8-4.0: missing `'' at end of line
1202 empty.y:4.8: warning: empty character literal
1203 empty.y:4.8: missing `'' at end of file
1204 ]])
1205
1206 AT_DATA([two.y],
1207 [[%%
1208 start: 'ab';
1209 start: 'ab
1210 ]])
1211 AT_CHECK([[perl -e "print 'start: \'ab';" >> two.y || exit 77]])
1212
1213 AT_BISON_CHECK([two.y], [1], [],
1214 [[two.y:2.8-11: warning: extra characters in character literal
1215 two.y:3.8-4.0: warning: extra characters in character literal
1216 two.y:3.8-4.0: missing `'' at end of line
1217 two.y:4.8-10: warning: extra characters in character literal
1218 two.y:4.8-10: missing `'' at end of file
1219 ]])
1220
1221 AT_DATA([three.y],
1222 [[%%
1223 start: 'abc';
1224 start: 'abc
1225 ]])
1226 AT_CHECK([[perl -e "print 'start: \'abc';" >> three.y || exit 77]])
1227
1228 AT_BISON_CHECK([three.y], [1], [],
1229 [[three.y:2.8-12: warning: extra characters in character literal
1230 three.y:3.8-4.0: warning: extra characters in character literal
1231 three.y:3.8-4.0: missing `'' at end of line
1232 three.y:4.8-11: warning: extra characters in character literal
1233 three.y:4.8-11: missing `'' at end of file
1234 ]])
1235
1236 AT_CLEANUP
1237
1238 ## ------------------------- ##
1239 ## Bad escapes in literals.  ##
1240 ## ------------------------- ##
1241
1242 AT_SETUP([[Bad escapes in literals]])
1243
1244 AT_DATA([input.y],
1245 [[%%
1246 start: '\777' '\0' '\xfff' '\x0'
1247        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
1248        '\ ' '\A';
1249 ]])
1250
1251 # It is not easy to create special characters, we cannot even trust tr.
1252 # Beside we cannot even expect "echo '\0'" to output two characters
1253 # (well three with \n): at least Bash 3.2 converts the two-character
1254 # sequence "\0" into a single NUL character.
1255 AT_CHECK([[perl -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
1256            || exit 77]])
1257
1258 AT_BISON_CHECK([input.y], [1], [],
1259 [[input.y:2.9-12: invalid number after \-escape: 777
1260 input.y:2.8-13: warning: empty character literal
1261 input.y:2.16-17: invalid number after \-escape: 0
1262 input.y:2.15-18: warning: empty character literal
1263 input.y:2.21-25: invalid number after \-escape: xfff
1264 input.y:2.20-26: warning: empty character literal
1265 input.y:2.29-31: invalid number after \-escape: x0
1266 input.y:2.28-32: warning: empty character literal
1267 input.y:3.9-14: invalid number after \-escape: uffff
1268 input.y:3.8-15: warning: empty character literal
1269 input.y:3.18-23: invalid number after \-escape: u0000
1270 input.y:3.17-24: warning: empty character literal
1271 input.y:3.27-36: invalid number after \-escape: Uffffffff
1272 input.y:3.26-37: warning: empty character literal
1273 input.y:3.40-49: invalid number after \-escape: U00000000
1274 input.y:3.39-50: warning: empty character literal
1275 input.y:4.9-10: invalid character after \-escape: ` '
1276 input.y:4.8-11: warning: empty character literal
1277 input.y:4.14-15: invalid character after \-escape: A
1278 input.y:4.13-16: warning: empty character literal
1279 input.y:5.9-16: invalid character after \-escape: \t
1280 input.y:5.17: invalid character after \-escape: \f
1281 input.y:5.18: invalid character after \-escape: \0
1282 input.y:5.19: invalid character after \-escape: \001
1283 ]])
1284
1285 AT_CLEANUP