tests/input.at

   1 # Checking the Bison scanner.                    -*- Autotest -*-
   2 # Copyright (C) 2002-2007, 2009-2010 Free Software Foundation, Inc.
   3
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 AT_BANNER([[Input Processing.]])
  18
  19 # Mostly test that we are robust to mistakes.
  20
  21
  22 ## ------------ ##
  23 ## Invalid $n.  ##
  24 ## ------------ ##
  25
  26 AT_SETUP([Invalid $n and @n])
  27
  28 AT_DATA([input.y],
  29 [[%%
  30 exp: { $$ = $1 ; };
  31 exp: { @$ = @1 ; };
  32 ]])
  33
  34 AT_BISON_CHECK([input.y], [1], [],
  35 [[input.y:2.13-14: integer out of range: `$1'
  36 input.y:3.13-14: integer out of range: `@1'
  37 ]])
  38
  39 AT_CLEANUP
  40
  41
  42 ## -------------- ##
  43 ## Type Clashes.  ##
  44 ## -------------- ##
  45
  46 AT_SETUP([Type Clashes])
  47
  48 AT_DATA([input.y],
  49 [[%union { int bar; }
  50 %token foo
  51 %type <bar> exp
  52 %%
  53 exp: foo { $$; } foo { $2; } foo
  54    | foo
  55    | /* Empty. */
  56    ;
  57 ]])
  58
  59 AT_BISON_CHECK([input.y], [1], [],
  60 [[input.y:5.12-13: $$ for the midrule at $2 of `exp' has no declared type
  61 input.y:5.24-25: $2 of `exp' has no declared type
  62 input.y:5.6-32: warning: type clash on default action: <bar> != <>
  63 input.y:6.6-8: warning: type clash on default action: <bar> != <>
  64 input.y:7.5: warning: empty rule for typed nonterminal, and no action
  65 ]])
  66
  67 AT_CLEANUP
  68
  69
  70 # _AT_UNUSED_VALUES_DECLARATIONS()
  71 # --------------------------------------------
  72 # Generate the token, type, and destructor
  73 # declarations for the unused values tests.
  74
  75 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
  76 [[[%token <integer> INT;
  77 %type <integer> a b c d e f g h i j k l;
  78 %destructor { destroy ($$); } 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,
  84 # compile it, run it.  If DECLARATIONS_AFTER
  85 # is set, then the token, type, and destructor
  86 # declarations are generated after the rules
  87 # rather than before.  If CHECK_MIDRULE_VALUES
  88 # is set, then --warnings=midrule-values is
  89 # set.
  90
  91 m4_define([AT_CHECK_UNUSED_VALUES],
  92 [AT_DATA([input.y],
  93 m4_ifval($1, [
  94
  95
  96 ], [_AT_UNUSED_VALUES_DECLARATIONS
  97 ])[[%%
  98 start:
  99   'a' a { $]2[ } | 'b' b { $]2[ } | 'c' c { $]2[ } | 'd' d { $]2[ } | 'e' e { $]2[ }
 100 | 'f' f { $]2[ } | 'g' g { $]2[ } | 'h' h { $]2[ } | 'i' i { $]2[ } | 'j' j { $]2[ }
 101 | 'k' k { $]2[ } | 'l' l { $]2[ }
 102 ;
 103
 104 a: INT | INT { } INT { } INT { };
 105 b: INT | /* empty */;
 106 c: INT | INT { $]1[ } INT { $<integer>2 } INT { $<integer>4 };
 107 d: INT | INT { } INT { $]1[ } INT { $<integer>2 };
 108 e: INT | INT { } INT {  } INT { $]1[ };
 109 f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
 110 g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
 111 h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
 112 i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
 113 j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
 114 k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
 115 l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
 116 _AT_UNUSED_VALUES_DECLARATIONS])
 117 )
 118
 119 AT_BISON_CHECK(m4_ifval($2, [ --warnings=midrule-values ])[ input.y], [0], [],
 120 [[input.y:11.10-32: warning: unset value: $]$[
 121 input.y:11.10-32: warning: unused value: $]1[
 122 input.y:11.10-32: warning: unused value: $]3[
 123 input.y:11.10-32: warning: unused value: $]5[
 124 input.y:12.9: warning: empty rule for typed nonterminal, and no action
 125 ]]m4_ifval($2, [[[input.y:13.14-19: warning: unset value: $$
 126 input.y:13.25-39: warning: unset value: $$
 127 ]]])[[input.y:13.10-59: warning: unset value: $]$[
 128 input.y:13.10-59: warning: unused value: $]3[
 129 input.y:13.10-59: warning: unused value: $]5[
 130 ]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
 131 ]]])[[input.y:14.10-47: warning: unset value: $]$[
 132 input.y:14.10-47: warning: unused value: $]3[
 133 input.y:14.10-47: warning: unused value: $]5[
 134 input.y:15.10-36: warning: unset value: $]$[
 135 input.y:15.10-36: warning: unused value: $]3[
 136 input.y:15.10-36: warning: unused value: $]5[
 137 input.y:17.10-58: warning: unset value: $]$[
 138 input.y:17.10-58: warning: unused value: $]1[
 139 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
 140 ]]])[[input.y:17.10-58: warning: unused value: $]3[
 141 ]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[
 142 ]]])[[input.y:17.10-58: warning: unused value: $]5[
 143 input.y:18.10-72: warning: unset value: $]$[
 144 input.y:18.10-72: warning: unused value: $]1[
 145 input.y:18.10-72: warning: unused value: $]3[
 146 ]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
 147 ]]])[[input.y:18.10-72: warning: unused value: $]5[
 148 ]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[
 149 ]]])[[input.y:21.10-68: warning: unset value: $]$[
 150 input.y:21.10-68: warning: unused value: $]1[
 151 input.y:21.10-68: warning: unused value: $]2[
 152 ]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
 153 ]]]))])
 154
 155
 156 ## --------------- ##
 157 ## Unused values.  ##
 158 ## --------------- ##
 159
 160 AT_SETUP([Unused values])
 161 AT_CHECK_UNUSED_VALUES
 162 AT_CHECK_UNUSED_VALUES(, [1])
 163 AT_CLEANUP
 164
 165
 166 ## ------------------------------------------ ##
 167 ## Unused values before symbol declarations.  ##
 168 ## ------------------------------------------ ##
 169
 170 AT_SETUP([Unused values before symbol declarations])
 171 AT_CHECK_UNUSED_VALUES([1])
 172 AT_CHECK_UNUSED_VALUES([1], [1])
 173 AT_CLEANUP
 174
 175
 176 ## --------------------------------------------- ##
 177 ## Default %printer and %destructor redeclared.  ##
 178 ## --------------------------------------------- ##
 179
 180 AT_SETUP([Default %printer and %destructor redeclared])
 181
 182 AT_DATA([[input.y]],
 183 [[%destructor { destroy ($$); } <*> <*>
 184 %printer { destroy ($$); } <*> <*>
 185
 186 %destructor { destroy ($$); } <*>
 187 %printer { destroy ($$); } <*>
 188
 189 %destructor { destroy ($$); } <> <>
 190 %printer { destroy ($$); } <> <>
 191
 192 %destructor { destroy ($$); } <>
 193 %printer { destroy ($$); } <>
 194
 195 %%
 196
 197 start: ;
 198
 199 %destructor { destroy ($$); } <*>;
 200 %printer { destroy ($$); } <*>;
 201
 202 %destructor { destroy ($$); } <>;
 203 %printer { destroy ($$); } <>;
 204 ]])
 205
 206 AT_BISON_CHECK([input.y], [1], [],
 207 [[input.y:1.13-29: redeclaration for default tagged %destructor
 208 input.y:1.13-29: previous declaration
 209 input.y:2.10-26: redeclaration for default tagged %printer
 210 input.y:2.10-26: previous declaration
 211 input.y:4.13-29: redeclaration for default tagged %destructor
 212 input.y:1.13-29: previous declaration
 213 input.y:5.10-26: redeclaration for default tagged %printer
 214 input.y:2.10-26: previous declaration
 215 input.y:7.13-29: redeclaration for default tagless %destructor
 216 input.y:7.13-29: previous declaration
 217 input.y:8.10-26: redeclaration for default tagless %printer
 218 input.y:8.10-26: previous declaration
 219 input.y:10.13-29: redeclaration for default tagless %destructor
 220 input.y:7.13-29: previous declaration
 221 input.y:11.10-26: redeclaration for default tagless %printer
 222 input.y:8.10-26: previous declaration
 223 input.y:17.13-29: redeclaration for default tagged %destructor
 224 input.y:4.13-29: previous declaration
 225 input.y:18.10-26: redeclaration for default tagged %printer
 226 input.y:5.10-26: previous declaration
 227 input.y:20.13-29: redeclaration for default tagless %destructor
 228 input.y:10.13-29: previous declaration
 229 input.y:21.10-26: redeclaration for default tagless %printer
 230 input.y:11.10-26: previous declaration
 231 ]])
 232
 233 AT_CLEANUP
 234
 235
 236 ## ---------------------------------------------- ##
 237 ## Per-type %printer and %destructor redeclared.  ##
 238 ## ---------------------------------------------- ##
 239
 240 AT_SETUP([Per-type %printer and %destructor redeclared])
 241
 242 AT_DATA([[input.y]],
 243 [[%destructor { destroy ($$); } <field1> <field2>
 244 %printer { destroy ($$); } <field1> <field2>
 245
 246 %destructor { destroy ($$); } <field1> <field1>
 247 %printer { destroy ($$); } <field2> <field2>
 248
 249 %%
 250
 251 start: ;
 252
 253 %destructor { destroy ($$); } <field2> <field1>;
 254 %printer { destroy ($$); } <field2> <field1>;
 255 ]])
 256
 257 AT_BISON_CHECK([input.y], [1], [],
 258 [[input.y:4.13-29: %destructor redeclaration for <field1>
 259 input.y:1.13-29: previous declaration
 260 input.y:4.13-29: %destructor redeclaration for <field1>
 261 input.y:4.13-29: previous declaration
 262 input.y:5.10-26: %printer redeclaration for <field2>
 263 input.y:2.10-26: previous declaration
 264 input.y:5.10-26: %printer redeclaration for <field2>
 265 input.y:5.10-26: previous declaration
 266 input.y:11.13-29: %destructor redeclaration for <field1>
 267 input.y:4.13-29: previous declaration
 268 input.y:11.13-29: %destructor redeclaration for <field2>
 269 input.y:1.13-29: previous declaration
 270 input.y:12.10-26: %printer redeclaration for <field1>
 271 input.y:2.10-26: previous declaration
 272 input.y:12.10-26: %printer redeclaration for <field2>
 273 input.y:5.10-26: previous declaration
 274 ]])
 275
 276 AT_CLEANUP
 277
 278
 279 ## ---------------------------------------- ##
 280 ## Unused values with default %destructor.  ##
 281 ## ---------------------------------------- ##
 282
 283 AT_SETUP([Unused values with default %destructor])
 284
 285 AT_DATA([[input.y]],
 286 [[%destructor { destroy ($$); } <>
 287 %type <tag> tagged
 288
 289 %%
 290
 291 start: end end tagged tagged { $<tag>1; $3; } ;
 292 end: { } ;
 293 tagged: { } ;
 294 ]])
 295
 296 AT_BISON_CHECK([input.y], [0], [],
 297 [[input.y:6.8-45: warning: unset value: $$
 298 input.y:6.8-45: warning: unused value: $2
 299 input.y:7.6-8: warning: unset value: $$
 300 ]])
 301
 302 AT_DATA([[input.y]],
 303 [[%destructor { destroy ($$); } <*>
 304 %type <tag> tagged
 305
 306 %%
 307
 308 start: end end tagged tagged { $<tag>1; $3; } ;
 309 end: { } ;
 310 tagged: { } ;
 311 ]])
 312
 313 AT_BISON_CHECK([input.y], [0], [],
 314 [[input.y:6.8-45: warning: unused value: $4
 315 input.y:8.9-11: warning: unset value: $$
 316 ]])
 317
 318 AT_CLEANUP
 319
 320
 321 ## ----------------------------------------- ##
 322 ## Unused values with per-type %destructor.  ##
 323 ## ----------------------------------------- ##
 324
 325 AT_SETUP([Unused values with per-type %destructor])
 326
 327 AT_DATA([[input.y]],
 328 [[%destructor { destroy ($$); } <field1>
 329 %type <field1> start end
 330
 331 %%
 332
 333 start: end end { $1; } ;
 334 end: { }  ;
 335 ]])
 336
 337 AT_BISON_CHECK([input.y], [0], [],
 338 [[input.y:6.8-22: warning: unset value: $$
 339 input.y:6.8-22: warning: unused value: $2
 340 input.y:7.6-8: warning: unset value: $$
 341 ]])
 342
 343 AT_CLEANUP
 344
 345
 346 ## ---------------------- ##
 347 ## Incompatible Aliases.  ##
 348 ## ---------------------- ##
 349
 350 AT_SETUP([Incompatible Aliases])
 351
 352 AT_DATA([input.y],
 353 [[%token foo "foo"
 354
 355 %type <bar>       foo
 356 %printer {bar}    foo
 357 %destructor {bar} foo
 358 %left             foo
 359
 360 %type <baz>       "foo"
 361 %printer {baz}    "foo"
 362 %destructor {baz} "foo"
 363 %left             "foo"
 364
 365 %%
 366 exp: foo;
 367 ]])
 368
 369 AT_BISON_CHECK([input.y], [1], [],
 370 [[input.y:8.7-11: %type redeclaration for foo
 371 input.y:3.7-11: previous declaration
 372 input.y:10.13-17: %destructor redeclaration for foo
 373 input.y:5.13-17: previous declaration
 374 input.y:9.10-14: %printer redeclaration for foo
 375 input.y:4.10-14: previous declaration
 376 input.y:11.1-5: %left redeclaration for foo
 377 input.y:6.1-5: previous declaration
 378 ]])
 379
 380 AT_CLEANUP
 381
 382
 383
 384 ## ----------------------- ##
 385 ## Torturing the Scanner.  ##
 386 ## ----------------------- ##
 387
 388 # Be sure to compile and run, so that the C compiler checks what
 389 # we do.
 390
 391 AT_SETUP([Torturing the Scanner])
 392
 393
 394 AT_DATA([input.y], [])
 395 AT_BISON_CHECK([input.y], [1], [],
 396 [[input.y:1.1: syntax error, unexpected end of file
 397 ]])
 398
 399
 400 AT_DATA([input.y],
 401 [{}
 402 ])
 403 AT_BISON_CHECK([input.y], [1], [],
 404 [[input.y:1.1-2: syntax error, unexpected {...}
 405 ]])
 406
 407
 408 AT_DATA_GRAMMAR([input.y],
 409 [[%{
 410 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 411 const char *foo = "So %{ and %} can be here too.";
 412
 413 #if 0
 414 /* These examples test Bison while not stressing C compilers too much.
 415    Many C compilers mishandle backslash-newlines, so this part of the
 416    test is inside "#if 0".  The comment and string are written so that
 417    the "#endif" will be seen regardless of the C compiler bugs that we
 418    know about, namely:
 419
 420      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 421      comment.
 422
 423      The Apple Darwin compiler (as of late 2002) mishandles
 424      \\[newline]' within a character constant.
 425
 426    */
 427
 428 /\
 429 * A comment with backslash-newlines in it. %} *\
 430 \
 431 /
 432 /* { Close the above comment, if the C compiler mishandled it.  */
 433
 434 char str[] = "\\
 435 " A string with backslash-newlines in it %{ %} \\
 436 \
 437 "";
 438
 439 char apostrophe = '\'';
 440 #endif
 441
 442 #include <stdio.h>
 443 #include <stdlib.h>
 444 %}
 445 /* %{ and %} can be here too. */
 446
 447 %{
 448 /* Exercise pre-prologue dependency to %union.  */
 449 typedef int value;
 450 %}
 451
 452 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 453
 454 /* Also exercise %union. */
 455 %union
 456 {
 457   value ival; /* A comment to exercise an old bug. */
 458 };
 459
 460
 461 /* Exercise post-prologue dependency to %union.  */
 462 %{
 463 static YYSTYPE value_as_yystype (value val);
 464
 465 /* Exercise quotes in declarations.  */
 466 char quote[] = "@:>@@:>@,";
 467 %}
 468
 469 %{
 470 static void yyerror (const char *s);
 471 static int yylex (void);
 472 %}
 473
 474 %type <ival> '@<:@'
 475
 476 /* Exercise quotes in strings.  */
 477 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 478
 479 %%
 480 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 481 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 482   {
 483     /* Exercise quotes in braces.  */
 484     char tmp[] = "@<:@%c@:>@,\n";
 485     printf (tmp, $1);
 486   }
 487 ;
 488
 489 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 490 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 491 output.or.oline.opt: ;|oline;;|output;;;
 492 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 493 %%
 494 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 495
 496 static YYSTYPE
 497 value_as_yystype (value val)
 498 {
 499   YYSTYPE res;
 500   res.ival = val;
 501   return res;
 502 }
 503
 504 static int
 505 yylex (void)
 506 {
 507   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
 508 #output "; /* "
 509   */
 510   static size_t toknum;
 511   if (! (toknum < sizeof input))
 512     abort ();
 513   yylval = value_as_yystype (input[toknum]);
 514   return input[toknum++];
 515 }
 516
 517 static void
 518 yyerror (const char *msg)
 519 {
 520   fprintf (stderr, "%s\n", msg);
 521 }
 522 ]])
 523
 524 # Pacify Emacs'font-lock-mode: "
 525
 526 AT_DATA([main.c],
 527 [[typedef int value;
 528 #include "input.h"
 529
 530 int yyparse (void);
 531
 532 int
 533 main (void)
 534 {
 535   return yyparse ();
 536 }
 537 ]])
 538
 539 AT_BISON_CHECK([-d -v -o input.c input.y])
 540 AT_COMPILE([input.o], [-c input.c])
 541 AT_COMPILE([main.o], [-c main.c])
 542 AT_COMPILE([input], [input.o main.o])
 543 AT_PARSER_CHECK([./input], 0,
 544 [[[@<:@],
 545 ]])
 546
 547 AT_CLEANUP
 548
 549
 550 ## ---------------------- ##
 551 ## Typed symbol aliases.  ##
 552 ## ---------------------- ##
 553
 554 AT_SETUP([Typed symbol aliases])
 555
 556 # Bison 2.0 broke typed symbol aliases - ensure they work.
 557
 558 AT_DATA_GRAMMAR([input.y],
 559 [[%union
 560 {
 561   int val;
 562 };
 563 %token <val> MY_TOKEN "MY TOKEN"
 564 %type <val> exp
 565 %%
 566 exp: "MY TOKEN";
 567 %%
 568 ]])
 569
 570 AT_BISON_CHECK([-o input.c input.y])
 571
 572 AT_CLEANUP
 573
 574
 575 ## --------- ##
 576 ## Require.  ##
 577 ## --------- ##
 578
 579 m4_define([AT_CHECK_REQUIRE],
 580 [AT_SETUP([Require $1])
 581 AT_DATA_GRAMMAR([input.y],
 582 [[%require "$1";
 583 %%
 584 empty_file:;
 585 ]])
 586 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
 587 AT_CLEANUP
 588 ])
 589
 590 AT_CHECK_REQUIRE(1.0, 0)
 591 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 592 ## FIXME: Some day augment this version number.
 593 AT_CHECK_REQUIRE(100.0, 63)
 594
 595
 596 ## ------------------------------------- ##
 597 ## String aliases for character tokens.  ##
 598 ## ------------------------------------- ##
 599
 600 AT_SETUP([String aliases for character tokens])
 601
 602 # Bison once thought a character token and its alias were different symbols
 603 # with the same user token number.
 604
 605 AT_DATA_GRAMMAR([input.y],
 606 [[%token 'a' "a"
 607 %%
 608 start: 'a';
 609 %%
 610 ]])
 611
 612 AT_BISON_CHECK([-o input.c input.y])
 613
 614 AT_CLEANUP
 615
 616
 617 ## --------------------- ##
 618 ## Unclosed constructs.  ##
 619 ## --------------------- ##
 620
 621 AT_SETUP([Unclosed constructs])
 622
 623 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
 624 # they were prepended to whatever it STRING_GROW'ed next.  It also threw them
 625 # away rather than returning them to the parser.  The effect was confusing
 626 # subsequent error messages.
 627
 628 AT_DATA([input.y],
 629 [[%token A "a
 630 %token B "b"
 631 %token AB "ab" // Used to complain that "ab" was already used.
 632 %token C '1
 633 %token TWO "2"
 634 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
 635
 636 %%
 637
 638 start: ;
 639
 640 // Used to report a syntax error because it didn't see any kind of symbol
 641 // identifier.
 642 %type <f> 'a
 643 ;
 644 %type <f> "a
 645 ;
 646 // Used to report a syntax error because it didn't see braced code.
 647 %destructor { free ($$)
 648 ]])
 649
 650 AT_BISON_CHECK([-o input.c input.y], 1, [],
 651 [[input.y:1.10-2.0: missing `"' at end of line
 652 input.y:4.10-5.0: missing `'' at end of line
 653 input.y:14.11-15.0: missing `'' at end of line
 654 input.y:16.11-17.0: missing `"' at end of line
 655 input.y:19.13-20.0: missing `}' at end of file
 656 input.y:20.1: syntax error, unexpected end of file
 657 ]])
 658
 659 AT_CLEANUP
 660
 661
 662 ## ------------------------- ##
 663 ## %start after first rule.  ##
 664 ## ------------------------- ##
 665
 666 AT_SETUP([%start after first rule])
 667
 668 # Bison once complained that a %start after the first rule was a redeclaration
 669 # of the start symbol.
 670
 671 AT_DATA([input.y],
 672 [[%%
 673 false_start: ;
 674 start: false_start ;
 675 %start start;
 676 ]])
 677
 678 AT_BISON_CHECK([-o input.c input.y])
 679
 680 AT_CLEANUP
 681
 682
 683 ## --------------------- ##
 684 ## %prec takes a token.  ##
 685 ## --------------------- ##
 686
 687 AT_SETUP([%prec takes a token])
 688
 689 # Bison once allowed %prec sym where sym was a nonterminal.
 690
 691 AT_DATA([input.y],
 692 [[%%
 693 start: PREC %prec PREC ;
 694 PREC: ;
 695 ]])
 696
 697 AT_BISON_CHECK([input.y], [1], [],
 698 [[input.y:3.1-4: rule given for PREC, which is a token
 699 ]])
 700
 701 AT_CLEANUP
 702
 703
 704 ## ------------------------------- ##
 705 ## %prec's token must be defined.  ##
 706 ## ------------------------------- ##
 707
 708 AT_SETUP([[%prec's token must be defined]])
 709
 710 # According to POSIX, a %prec token must be defined separately.
 711
 712 AT_DATA([[input.y]],
 713 [[%%
 714 start: %prec PREC ;
 715 ]])
 716
 717 AT_BISON_CHECK([[input.y]], [[0]], [],
 718 [[input.y:2.8-17: warning: token for %prec is not defined: PREC
 719 ]])
 720
 721 AT_CLEANUP
 722
 723
 724 ## -------------------------------- ##
 725 ## Reject unused %code qualifiers.  ##
 726 ## -------------------------------- ##
 727
 728 AT_SETUP([Reject unused %code qualifiers])
 729
 730 AT_DATA([input-c.y],
 731 [[%code q {}
 732 %code bad {}
 733 %code bad {}
 734 %code format {}
 735 %%
 736 start: ;
 737 ]])
 738 AT_BISON_CHECK([[input-c.y]], [0], [],
 739 [[input-c.y:1.7: warning: %code qualifier `q' is not used
 740 input-c.y:2.7-9: warning: %code qualifier `bad' is not used
 741 input-c.y:3.7-9: warning: %code qualifier `bad' is not used
 742 input-c.y:4.7-12: warning: %code qualifier `format' is not used
 743 ]])
 744
 745 AT_DATA([input-c-glr.y],
 746 [[%code q {}
 747 %code bad {}
 748  %code bad {}
 749 %%
 750 start: ;
 751 ]])
 752 AT_BISON_CHECK([[input-c-glr.y]], [0], [],
 753 [[input-c-glr.y:1.7: warning: %code qualifier `q' is not used
 754 input-c-glr.y:2.7-9: warning: %code qualifier `bad' is not used
 755 input-c-glr.y:3.8-10: warning: %code qualifier `bad' is not used
 756 ]])
 757
 758 AT_DATA([input-c++.y],
 759 [[%code q {}
 760 %code bad {}
 761  %code q {}
 762 %%
 763 start: ;
 764 ]])
 765 AT_BISON_CHECK([[input-c++.y]], [0], [],
 766 [[input-c++.y:1.7: warning: %code qualifier `q' is not used
 767 input-c++.y:2.7-9: warning: %code qualifier `bad' is not used
 768 input-c++.y:3.8: warning: %code qualifier `q' is not used
 769 ]])
 770
 771 AT_DATA([input-c++-glr.y],
 772 [[%code bad {}
 773 %code q {}
 774 %code q {}
 775 %%
 776 start: ;
 777 ]])
 778 AT_BISON_CHECK([[input-c++-glr.y]], [0], [],
 779 [[input-c++-glr.y:1.7-9: warning: %code qualifier `bad' is not used
 780 input-c++-glr.y:2.7: warning: %code qualifier `q' is not used
 781 input-c++-glr.y:3.7: warning: %code qualifier `q' is not used
 782 ]])
 783
 784 AT_DATA([special-char-@@.y],
 785 [[%code bad {}
 786 %code q {}
 787 %code q {}
 788 %%
 789 start: ;
 790 ]])
 791 AT_BISON_CHECK([[special-char-@@.y]], [0], [],
 792 [[special-char-@@.y:1.7-9: warning: %code qualifier `bad' is not used
 793 special-char-@@.y:2.7: warning: %code qualifier `q' is not used
 794 special-char-@@.y:3.7: warning: %code qualifier `q' is not used
 795 ]])
 796
 797 AT_DATA([special-char-@:>@.y],
 798 [[%code bad {}
 799 %code q {}
 800 %code q {}
 801 %%
 802 start: ;
 803 ]])
 804 AT_BISON_CHECK([[special-char-@:>@.y]], [0], [],
 805 [[special-char-@:>@.y:1.7-9: warning: %code qualifier `bad' is not used
 806 special-char-@:>@.y:2.7: warning: %code qualifier `q' is not used
 807 special-char-@:>@.y:3.7: warning: %code qualifier `q' is not used
 808 ]])
 809
 810 AT_CLEANUP
 811
 812
 813 ## ---------------- ##
 814 ## %define errors.  ##
 815 ## ---------------- ##
 816
 817 AT_SETUP([%define errors])
 818
 819 AT_DATA([input.y],
 820 [[%define var "value1"
 821 %define var "value1"
 822  %define var "value2"
 823 %define special1 "@:>@"
 824 %define special2 "@<:@"
 825 %%
 826 start: ;
 827 ]])
 828
 829 AT_BISON_CHECK([[input.y]], [0], [],
 830 [[input.y:2.9-11: warning: %define variable `var' redefined
 831 input.y:1.9-11: warning: previous definition
 832 input.y:3.10-12: warning: %define variable `var' redefined
 833 input.y:2.9-11: warning: previous definition
 834 input.y:1.9-11: warning: %define variable `var' is not used
 835 input.y:2.9-11: warning: %define variable `var' is not used
 836 input.y:3.10-12: warning: %define variable `var' is not used
 837 input.y:4.9-16: warning: %define variable `special1' is not used
 838 input.y:5.9-16: warning: %define variable `special2' is not used
 839 ]])
 840
 841 AT_CLEANUP
 842
 843 ## --------------------------- ##
 844 ## %define Boolean variables.  ##
 845 ## --------------------------- ##
 846
 847 AT_SETUP([[%define Boolean variables]])
 848
 849 AT_DATA([Input.y],
 850 [[%language "Java"
 851 %define public "maybe"
 852 %define parser_class_name "Input"
 853 %%
 854 start: ;
 855 ]])
 856
 857 AT_BISON_CHECK([[Input.y]], [1], [],
 858 [[Input.y:2.9-14: invalid value for %define Boolean variable `public'
 859 ]])
 860
 861 AT_CLEANUP
 862
 863 ## ------------------------ ##
 864 ## %define enum variables.  ##
 865 ## ------------------------ ##
 866
 867 AT_SETUP([[%define enum variables]])
 868
 869 AT_DATA([[input.y]],
 870 [[%define api.push_pull "neither"
 871 %%
 872 start: ;
 873 ]])
 874
 875 AT_BISON_CHECK([[input.y]], [1], [],
 876 [[input.y:1.9-21: invalid value for %define variable `api.push_pull': `neither'
 877 ]])
 878
 879 AT_CLEANUP
 880
 881 ## ------------------------- ##
 882 ## Unused %define api.pure.  ##
 883 ## ------------------------- ##
 884
 885 AT_SETUP([[Unused %define api.pure]])
 886
 887 # AT_CHECK_API_PURE(DECLS, VALUE)
 888 # -------------------------------
 889 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
 890 # are specified.
 891 m4_define([AT_CHECK_API_PURE],
 892 [
 893 AT_DATA([[input.y]],
 894 [[%define api.pure ]$2[
 895 ]$1[
 896 %%
 897 start: ;
 898 ]])
 899
 900 AT_BISON_CHECK([[input.y]], [0], [],
 901 [[input.y:1.9-16: warning: %define variable `api.pure' is not used
 902 ]])
 903 ])
 904
 905 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
 906 AT_CHECK_API_PURE([[%language "c++" %defines]], [["false"]])
 907 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
 908 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [["false"]])
 909 AT_CHECK_API_PURE([[%language "java"]], [["true"]])
 910 AT_CHECK_API_PURE([[%language "java"]], [["false"]])
 911
 912 AT_CLEANUP
 913
 914 ## -------------------------------- ##
 915 ## C++ namespace reference errors.  ##
 916 ## -------------------------------- ##
 917
 918 AT_SETUP([[C++ namespace reference errors]])
 919
 920 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
 921 # -------------------------------------------------------------
 922 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
 923 m4_define([AT_CHECK_NAMESPACE_ERROR],
 924 [
 925 AT_DATA([[input.y]],
 926 [[%language "C++"
 927 %defines
 928 %define namespace "]$1["
 929 %%
 930 start: ;
 931 ]])
 932
 933 AT_BISON_CHECK([[input.y]], [1], [],
 934 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
 935 [[input.y:3.9-17: ]b4_arg[
 936 ]])])
 937 ])
 938
 939 AT_CHECK_NAMESPACE_ERROR([[]],
 940                          [[namespace reference is empty]])
 941 AT_CHECK_NAMESPACE_ERROR([[                             ]],
 942                          [[namespace reference is empty]])
 943 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
 944                          [[namespace reference has consecutive "::"]])
 945 AT_CHECK_NAMESPACE_ERROR([[foo::        ::bar]],
 946                          [[namespace reference has consecutive "::"]])
 947 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
 948                          [[namespace reference has consecutive "::"]])
 949 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
 950                          [[namespace reference has consecutive "::"]])
 951 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ::]],
 952                          [[namespace reference has consecutive "::"]],
 953                          [[namespace reference has a trailing "::"]])
 954 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
 955                          [[namespace reference has a trailing "::"]])
 956 AT_CHECK_NAMESPACE_ERROR([[foo::bar::   ]],
 957                          [[namespace reference has a trailing "::"]])
 958 AT_CHECK_NAMESPACE_ERROR([[::]],
 959                          [[namespace reference has a trailing "::"]])
 960
 961 AT_CLEANUP
 962
 963 ## ------------------------- ##
 964 ## Bad escapes in literals.  ##
 965 ## ------------------------- ##
 966
 967 AT_SETUP([[Bad escapes in literals]])
 968
 969 AT_DATA([input.y],
 970 [[%%
 971 start: '\777' '\0' '\xfff' '\x0'
 972        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
 973        '\ ' '\A';
 974 ]])
 975
 976 # It is not easy to create special characters, we cannot even trust tr.
 977 # Beside we cannot even expect "echo '\0'" to output two characters
 978 # (well three with \n): at least Bash 3.2 converts the two-character
 979 # sequence "\0" into a single NUL character.
 980 AT_CHECK([[perl -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
 981            || exit 77]])
 982
 983 AT_BISON_CHECK([input.y], [1], [],
 984 [[input.y:2.9-12: invalid number after \-escape: 777
 985 input.y:2.16-17: invalid number after \-escape: 0
 986 input.y:2.21-25: invalid number after \-escape: xfff
 987 input.y:2.29-31: invalid number after \-escape: x0
 988 input.y:3.9-14: invalid number after \-escape: uffff
 989 input.y:3.18-23: invalid number after \-escape: u0000
 990 input.y:3.27-36: invalid number after \-escape: Uffffffff
 991 input.y:3.40-49: invalid number after \-escape: U00000000
 992 input.y:4.9-10: invalid character after \-escape: ` '
 993 input.y:4.14-15: invalid character after \-escape: A
 994 input.y:5.9-16: invalid character after \-escape: \t
 995 input.y:5.17: invalid character after \-escape: \f
 996 input.y:5.18: invalid character after \-escape: \0
 997 input.y:5.19: invalid character after \-escape: \001
 998 ]])
 999
1000 AT_CLEANUP