tests/c++.at

   1 # Checking the C++ Features.                    -*- Autotest -*-
   2
   3 # Copyright (C) 2004-2005, 2007-2013 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([[C++ Features.]])
  19
  20
  21 ## ---------- ##
  22 ## Variants.  ##
  23 ## ---------- ##
  24
  25 # AT_TEST([DIRECTIVES])
  26 # ---------------------
  27 # Check the support of variants in C++, with the additional DIRECTIVES.
  28 m4_pushdef([AT_TEST],
  29 [AT_SETUP([Variants $1])
  30
  31 AT_BISON_OPTION_PUSHDEFS([%skeleton "lalr1.cc" $1])
  32 # Store strings and integers in a list of strings.
  33 AT_DATA_GRAMMAR([list.yy],
  34 [[%debug
  35 %skeleton "lalr1.cc"
  36 %defines
  37 %define api.value.type variant
  38 ]m4_bpatsubst([$1], [\\n], [
  39 ])[
  40
  41 %code requires // code for the .hh file
  42 {
  43 #include <list>
  44 #include <string>
  45 typedef std::list<std::string> strings_type;
  46 }
  47
  48 %code // code for the .cc file
  49 {
  50 #include <cstdlib> // abort, getenv
  51 #include <iostream>
  52 #include <sstream>
  53
  54   namespace yy
  55   {
  56     static]AT_TOKEN_CTOR_IF([[
  57     parser::symbol_type yylex ()]], [[
  58     parser::token_type yylex (parser::semantic_type* yylval]AT_LOCATION_IF([,
  59                               parser::location_type* yylloc])[)]])[;
  60   }
  61
  62   // Printing a list of strings (for %printer).
  63   // Koening look up will look into std, since that's an std::list.
  64   namespace std
  65   {
  66     std::ostream&
  67     operator<<(std::ostream& o, const strings_type& s)
  68     {
  69       o << '(';
  70       for (strings_type::const_iterator i = s.begin (); i != s.end (); ++i)
  71         {
  72           if (i != s.begin ())
  73             o << ", ";
  74           o << *i;
  75         }
  76       return o << ')';
  77     }
  78   }
  79
  80   // Conversion to string.
  81   template <typename T>
  82     inline
  83     std::string
  84     string_cast (const T& t)
  85   {
  86     std::ostringstream o;
  87     o << t;
  88     return o.str ();
  89   }
  90 }
  91
  92 %token <::std::string> TEXT;
  93 %token <int> NUMBER;
  94 %token END_OF_FILE 0;
  95
  96 %type <::std::string> item;
  97 // Using the template type to exercize its parsing.
  98 // Starting with :: to ensure we don't output "<::" which starts by the
  99 // digraph for the left square bracket.
 100 %type <::std::list<std::string>> list result;
 101
 102 %printer { yyo << $][$; }
 103   <int> <::std::string> <::std::list<std::string>>;
 104 %%
 105
 106 result:
 107   list          { std::cout << $][1 << std::endl; }
 108 ;
 109
 110 list:
 111   /* nothing */ { /* Generates an empty string list */ }
 112 | list item     { std::swap ($][$,$][1); $$.push_back ($][2); }
 113 | list error    { std::swap ($][$,$][1); }
 114 ;
 115
 116 item:
 117   TEXT          { std::swap ($][$,$][1); }
 118 | NUMBER        { if ($][1 == 3) YYERROR; else $][$ = string_cast ($][1); }
 119 ;
 120 %%
 121
 122 #ifdef TWO_STAGE_BUILD
 123 # define BUILD(Type, Value) build<Type> () = Value
 124 #else
 125 # define BUILD(Type, Value) build (Value)
 126 #endif
 127
 128 #define STAGE_MAX 5
 129 namespace yy
 130 {
 131   static]AT_TOKEN_CTOR_IF([[
 132   parser::symbol_type yylex ()]], [[
 133   parser::token_type yylex (parser::semantic_type* yylval]AT_LOCATION_IF([,
 134                             parser::location_type* yylloc])[)]])[
 135   {]AT_LOCATION_IF([
 136     typedef parser::location_type location;])[
 137     static int stage = -1;
 138     ++stage;
 139     if (stage == STAGE_MAX)
 140       {]AT_TOKEN_CTOR_IF([[
 141         return parser::make_END_OF_FILE (]AT_LOCATION_IF([location ()])[);]],
 142 [AT_LOCATION_IF([
 143         *yylloc = location ();])[
 144         return parser::token::END_OF_FILE;]])[
 145       }
 146     else if (stage % 2)
 147       {]AT_TOKEN_CTOR_IF([[
 148         return parser::make_NUMBER (stage]AT_LOCATION_IF([, location ()])[);]],
 149 [[
 150         yylval->BUILD (int, stage);]AT_LOCATION_IF([
 151         *yylloc = location ();])[
 152         return parser::token::NUMBER;]])[
 153       }
 154     else
 155       {]AT_TOKEN_CTOR_IF([[
 156         return parser::make_TEXT (string_cast (stage)]AT_LOCATION_IF([, location ()])[);]], [[
 157         yylval->BUILD (std::string, string_cast (stage));]AT_LOCATION_IF([
 158         *yylloc = location ();])[
 159         return parser::token::TEXT;]])[
 160       }
 161     abort ();
 162   }
 163 }
 164
 165 ]AT_YYERROR_DEFINE[
 166
 167 int
 168 main ()
 169 {
 170   yy::parser p;
 171   p.set_debug_level (!!getenv ("YYDEBUG"));
 172   return p.parse ();
 173 }
 174 ]])
 175
 176 AT_BISON_CHECK([-o list.cc list.yy])
 177 AT_COMPILE_CXX([list], [$NO_STRICT_ALIAS_CXXFLAGS list.cc])
 178 AT_PARSER_CHECK([./list], 0,
 179 [(0, 1, 2, 4)
 180 ])
 181
 182 AT_BISON_OPTION_POPDEFS
 183 AT_CLEANUP
 184 ])
 185
 186 AT_TEST([])
 187 AT_TEST([%define parse.assert])
 188 AT_TEST([%locations %define parse.assert])
 189 AT_TEST([[%define parse.assert %code {\n#define TWO_STAGE_BUILD\n}]])
 190 AT_TEST([[%define parse.assert %define api.token.constructor]])
 191 AT_TEST([[%define parse.assert %define api.token.constructor %define api.token.prefix "TOK_"]])
 192 AT_TEST([[%locations %define parse.assert %define api.token.constructor %define api.token.prefix "TOK_"]])
 193
 194 m4_popdef([AT_TEST])
 195
 196
 197 ## ----------------------- ##
 198 ## Doxygen Documentation.  ##
 199 ## ----------------------- ##
 200
 201 m4_define([AT_CHECK_DOXYGEN],
 202 [m4_case([$1],
 203          [Public],  [m4_pushdef([AT_DOXYGEN_PRIVATE], [NO])],
 204          [Private], [m4_pushdef([AT_DOXYGEN_PRIVATE], [YES])],
 205          [m4_fatal([invalid argument: $1])])
 206 AT_SETUP([Doxygen $1 Documentation])
 207
 208 AT_BISON_OPTION_PUSHDEFS([%skeleton "lalr1.cc"])
 209 AT_DATA([input.yy],
 210 [[%skeleton "lalr1.cc"
 211 %locations
 212 %debug
 213 %defines
 214 %%
 215 exp:;
 216 %%
 217 ]AT_YYERROR_DEFINE[
 218 ]])
 219
 220 AT_BISON_CHECK([-o input.cc input.yy], 0)
 221
 222 AT_DATA([Doxyfile],
 223 [# The PROJECT_NAME tag is a single word (or a sequence of words
 224 # surrounded by quotes) that should identify the project.
 225 PROJECT_NAME = "Bison C++ Parser"
 226
 227 # The QUIET tag can be used to turn on/off the messages that are
 228 # generated by doxygen. Possible values are YES and NO. If left blank
 229 # NO is used.
 230 QUIET = YES
 231
 232 # The WARNINGS tag can be used to turn on/off the warning messages
 233 # that are generated by doxygen. Possible values are YES and NO. If
 234 # left blank NO is used.
 235 WARNINGS     = YES
 236 # If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate
 237 # warnings for undocumented members. If EXTRACT_ALL is set to YES then
 238 # this flag will automatically be disabled.
 239 WARN_IF_UNDOCUMENTED   = YES
 240 # If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings
 241 # for potential errors in the documentation, such as not documenting
 242 # some parameters in a documented function, or documenting parameters
 243 # that don't exist or using markup commands wrongly.
 244 WARN_IF_DOC_ERROR      = YES
 245 # The WARN_FORMAT tag determines the format of the warning messages
 246 # that doxygen can produce. The string should contain the $file,
 247 # $line, and $text tags, which will be replaced by the file and line
 248 # number from which the warning originated and the warning text.
 249 WARN_FORMAT            = "$file:$line: $text"
 250
 251 # If the EXTRACT_ALL tag is set to YES doxygen will assume all
 252 # entities in documentation are documented, even if no documentation
 253 # was available.  Private class members and static file members will
 254 # be hidden unless the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set
 255 # to YES
 256 EXTRACT_ALL            = YES
 257
 258 # If the EXTRACT_PRIVATE tag is set to YES all private members of a
 259 # class will be included in the documentation.
 260 EXTRACT_PRIVATE        = AT_DOXYGEN_PRIVATE
 261
 262 # If the EXTRACT_STATIC tag is set to YES all static members of a file
 263 # will be included in the documentation.
 264 EXTRACT_STATIC         = AT_DOXYGEN_PRIVATE
 265 ])
 266
 267 AT_CHECK([doxygen --version || exit 77], 0, ignore)
 268 AT_CHECK([doxygen], 0, [], [ignore])
 269
 270 AT_BISON_OPTION_POPDEFS
 271 AT_CLEANUP
 272
 273 m4_popdef([AT_DOXYGEN_PRIVATE])
 274 ])# AT_CHECK_DOXYGEN
 275
 276 AT_CHECK_DOXYGEN([Public])
 277 AT_CHECK_DOXYGEN([Private])
 278
 279
 280 ## ------------ ##
 281 ## Namespaces.  ##
 282 ## ------------ ##
 283
 284 # AT_CHECK_NAMESPACE(NAMESPACE-DECL, [COMPILE-ERROR])
 285 # ---------------------------------------------------
 286 # See if Bison can handle %define namespace "NAMESPACE-DECL".  If COMPILE-ERROR
 287 # is specified, then Bison should accept the input, but compilation will fail,
 288 # so don't check compilation.
 289 m4_define([AT_CHECK_NAMESPACE],
 290 [
 291
 292 AT_DATA_GRAMMAR([[input.y]],
 293 [[%language "C++"
 294 %defines
 295 %define api.namespace "]$1["
 296 %union { int i; }
 297 %define global_tokens_and_yystype
 298 %locations
 299
 300 %code {
 301   // YYSTYPE contains a namespace reference.
 302   int yylex (YYSTYPE *lval, const ]$1[::parser::location_type*) {
 303     lval->i = 3;
 304     return 0;
 305   }
 306 }
 307
 308 %%
 309
 310 start: ;
 311
 312 %%
 313
 314 void
 315 ]$1[::parser::error (const ]$1[::parser::location_type &loc,
 316                      const std::string &msg)
 317 {
 318   std::cerr << "At " << loc << ": " << msg << std::endl;
 319 }
 320
 321 int
 322 main ()
 323 {
 324   ]$1[::parser p;
 325   return p.parse ();
 326 }
 327 ]])
 328
 329 AT_BISON_CHECK([[-o input.cc input.y]])
 330
 331 m4_if([$#], [1],
 332 [AT_COMPILE_CXX([[input]], [[input.cc]])
 333 AT_PARSER_CHECK([[./input]])])
 334
 335 ])
 336
 337 AT_SETUP([[Relative namespace references]])
 338 AT_CHECK_NAMESPACE([[foo]])
 339 AT_CHECK_NAMESPACE([[foo::bar]])
 340 AT_CHECK_NAMESPACE([[foo::bar::baz]])
 341 AT_CLEANUP
 342
 343 AT_SETUP([[Absolute namespace references]])
 344 AT_CHECK_NAMESPACE([[::foo]])
 345 AT_CHECK_NAMESPACE([[::foo::bar]])
 346 AT_CHECK_NAMESPACE([[::foo::bar::baz]])
 347 AT_CHECK_NAMESPACE([[   ::foo]])
 348 AT_CHECK_NAMESPACE([[    ::foo::bar]])
 349 AT_CHECK_NAMESPACE([[  ::foo::bar::baz]])
 350 AT_CLEANUP
 351
 352 AT_SETUP([[Syntactically invalid namespace references]])
 353 AT_CHECK_NAMESPACE([[:foo:bar]], [[-]])
 354 AT_CHECK_NAMESPACE([[foo: :bar]], [[-]])
 355 # This one is interesting because `[3]' is encoded as `@<:@3@:>@', which
 356 # contains single occurrences of `:'.
 357 AT_CHECK_NAMESPACE([[foo[3]::bar::baz]], [[-]])
 358 AT_CHECK_NAMESPACE([[foo::bar,baz]], [[-]])
 359 AT_CHECK_NAMESPACE([[foo::bar::(baz /* Pacify Emacs ) */]], [[-]])
 360 AT_CLEANUP
 361
 362
 363 ## -------------------------------------- ##
 364 ## Syntax error discarding no lookahead.  ##
 365 ## -------------------------------------- ##
 366
 367 # After a syntax error, lalr1.cc used to not check whether there
 368 # actually is a lookahead before discarding the lookahead.  As a result,
 369 # it mistakenly invoked the destructor for the previous lookahead.
 370
 371 AT_SETUP([[Syntax error discarding no lookahead]])
 372
 373 AT_DATA_GRAMMAR([[input.yy]],
 374 [[%skeleton "lalr1.cc"
 375
 376 %code {
 377   #include <string>
 378   int yylex (yy::parser::semantic_type *);
 379   #define USE(Args)
 380 }
 381
 382 %defines
 383 %define parse.error verbose
 384
 385 %nonassoc 'a' ;
 386
 387 %destructor {
 388   std::cerr << "Discarding 'a'." << std::endl;
 389 } 'a'
 390
 391 %%
 392
 393 start: error-reduce consistent-error 'a' { USE ($3); };
 394
 395 error-reduce:
 396   'a' 'a' consistent-error 'a' { USE (($1, $2, $4)); }
 397 | 'a' error { std::cerr << "Reducing 'a'." << std::endl; USE ($1); }
 398 ;
 399
 400 consistent-error:
 401   'a'
 402 | /*empty*/ %prec 'a'
 403 ;
 404
 405 // Provide another context in which all rules are useful so that this
 406 // test case looks a little more realistic.
 407 start: 'b' consistent-error ;
 408
 409 %%
 410
 411 int
 412 yylex (yy::parser::semantic_type *)
 413 {
 414   static char const *input = "aa";
 415   return *input++;
 416 }
 417
 418 void
 419 yy::parser::error (const std::string &m)
 420 {
 421   std::cerr << m << std::endl;
 422 }
 423
 424 int
 425 main ()
 426 {
 427   yy::parser parser;
 428   return parser.parse ();
 429 }
 430 ]])
 431 AT_BISON_CHECK([[-o input.cc input.yy]])
 432 AT_COMPILE_CXX([[input]])
 433 # This used to print "Discarding 'a'." again at the end.
 434 AT_PARSER_CHECK([[./input]], [[1]], [[]],
 435 [[syntax error
 436 Discarding 'a'.
 437 Reducing 'a'.
 438 ]])
 439
 440 AT_CLEANUP
 441
 442
 443 ## --------------------------- ##
 444 ## Syntax error as exception.  ##
 445 ## --------------------------- ##
 446
 447 AT_SETUP([[Syntax error as exception]])
 448
 449 AT_DATA_GRAMMAR([[input.yy]],
 450 [[%skeleton "lalr1.cc"
 451
 452 %code
 453 {
 454   #include <cstdlib>
 455   int yylex (yy::parser::semantic_type *);
 456 }
 457
 458 %defines
 459 %define api.value.type variant
 460 %define parse.error verbose
 461 %define parse.trace
 462 %%
 463
 464 start:
 465   thing
 466 | start thing
 467 ;
 468
 469 thing:
 470   error   { std::cerr << "caught error" << std::endl; }
 471 | item
 472 ;
 473
 474 item:
 475   'a'
 476 | 's'
 477   {
 478     throw yy::parser::syntax_error ("invalid expression");
 479   }
 480
 481 %%
 482
 483 int
 484 yylex (yy::parser::semantic_type *)
 485 {
 486   // 's': syntax error, 'l': lexical error.
 487   static char const *input = "asal";
 488   switch (int res = *input++)
 489   {
 490     case 'l':
 491       throw yy::parser::syntax_error ("invalid character");
 492     default:
 493       return res;
 494   }
 495 }
 496
 497 void
 498 yy::parser::error (const std::string &m)
 499 {
 500   std::cerr << "error: " << m << std::endl;
 501 }
 502
 503 int
 504 main ()
 505 {
 506   yy::parser parser;
 507   parser.set_debug_level (!!getenv ("YYDEBUG"));
 508   return parser.parse ();
 509 }
 510 ]])
 511 AT_BISON_CHECK([[-o input.cc input.yy]])
 512 AT_COMPILE_CXX([[input]])
 513
 514 AT_PARSER_CHECK([[./input]], [[0]], [[]],
 515 [[error: invalid expression
 516 caught error
 517 error: invalid character
 518 caught error
 519 ]])
 520
 521 AT_CLEANUP
 522
 523
 524 ## ------------------ ##
 525 ## Exception safety.  ##
 526 ## ------------------ ##
 527
 528 AT_SETUP([[Exception safety]])
 529
 530 AT_BISON_OPTION_PUSHDEFS([%skeleton "lalr1.cc"])
 531
 532 AT_DATA_GRAMMAR([[input.yy]],
 533 [[%skeleton "lalr1.cc"
 534 %defines // FIXME: Mandated in 2.6.
 535 %debug
 536 %error-verbose
 537
 538 %code requires
 539 {
 540   #include <cassert>
 541   #include <cstdlib> // size_t and getenv.
 542   #include <iostream>
 543   #include <list>
 544
 545   bool debug = false;
 546
 547   /// A class that counts its number of instances.
 548   struct Object
 549   {
 550     typedef std::list<const Object*> objects;
 551     static objects instances;
 552     char val;
 553
 554     static bool
 555     empty ()
 556     {
 557       return instances.empty();
 558     }
 559
 560     static void
 561     log (Object const *o, const std::string& msg)
 562     {
 563       if (debug)
 564         {
 565           if (o)
 566             std::cerr << o << "->";
 567           std::cerr << msg << " {";
 568           const char* sep = " ";
 569           for (objects::const_iterator i = instances.begin(),
 570                                        i_end = instances.end();
 571                i != i_end;
 572                ++i)
 573             {
 574               std::cerr << sep << *i;
 575               sep = ", ";
 576             }
 577           std::cerr << " }" << std::endl;
 578         }
 579     }
 580
 581     Object (char v)
 582       : val (v)
 583     {
 584       instances.push_back(this);
 585       log (this, "Object::Object");
 586     }
 587
 588     ~Object ()
 589     {
 590       instances.remove(this);
 591       log (this, "Object::~Object");
 592     }
 593   };
 594 }
 595
 596 %code
 597 {
 598   #include <cassert>
 599   #include <cstring> // strchr
 600   #include <stdexcept>
 601   int yylex (yy::parser::semantic_type *);
 602   Object::objects Object::instances;
 603   static char const *input;
 604 }
 605
 606 %union
 607 {
 608   Object *obj;
 609 }
 610
 611 %initial-action
 612 {
 613   if (strchr (input, 'i'))
 614     throw std::runtime_error ("initial-action");
 615 }
 616
 617 %destructor { delete $$; } <obj>;
 618 %printer
 619 {
 620   yyo << $$ << " '" << $$->val << '\'';
 621   if ($$->val == 'p')
 622     throw std::runtime_error ("printer");
 623 } <obj>;
 624
 625 %token <obj> 'a' 'E' 'e' 'p' 'R' 's' 'T'
 626 %type  <obj> list item
 627
 628 %%
 629
 630 start: list { delete $1; };
 631
 632 list:
 633   item       { $$ = $1; }
 634 | item list  { $$ = $1; delete $2; } // Right recursion to load the stack.
 635 ;
 636
 637 item:
 638   'a'  { $$ = $1; }
 639 | 'e'  { YYUSE ($$); YYUSE($1); error ("syntax error"); }
 640 // Not just 'E', otherwise we reduce when 'E' is the lookahead, and
 641 // then the stack is emptied, defeating the point of the test.
 642 | 'E' 'a' { YYUSE($1); $$ = $2; }
 643 | 'R'  { $$ = YY_NULL; delete $1; YYERROR; }
 644 | 'p'  { $$ = $1; }
 645 | 's'  { $$ = $1; throw std::runtime_error ("reduction"); }
 646 | 'T'  { $$ = YY_NULL; delete $1; YYABORT; }
 647 | error { $$ = YY_NULL; yyerrok; }
 648 ;
 649 %%
 650
 651 int
 652 yylex (yy::parser::semantic_type *lvalp)
 653 {
 654   // 'a': no error.
 655   // 'e': user action calls error.
 656   // 'E': syntax error, with yyerror that throws.
 657   // 'i': initial action throws.
 658   // 'l': yylex throws.
 659   // 'R': call YYERROR in the action
 660   // 's': reduction throws.
 661   // 'T': call YYABORT in the action
 662   switch (int res = *input++)
 663   {
 664     case 'l':
 665       throw std::runtime_error ("yylex");
 666     default:
 667       lvalp->obj = new Object (res);
 668       // Fall through.
 669     case 0:
 670       return res;
 671   }
 672 }
 673
 674 /* A C++ error reporting function.  */
 675 void
 676 yy::parser::error (const std::string& m)
 677 {
 678   throw std::runtime_error (m);
 679 }
 680
 681 int
 682 main (int argc, const char *argv[])
 683 {
 684   switch (argc)
 685   {
 686     case 2:
 687       input = argv[1];
 688       break;
 689     case 3:
 690       assert (std::string(argv[1]) == "--debug");
 691       debug = 1;
 692       input = argv[2];
 693       break;
 694     default:
 695       abort ();
 696   }
 697
 698   yy::parser parser;
 699   debug |= !!getenv ("YYDEBUG");
 700   parser.set_debug_level (debug);
 701   int res = 2;
 702   try
 703   {
 704     res = parser.parse ();
 705   }
 706   catch (const std::exception& e)
 707   {
 708     std::cerr << "exception caught: " << e.what () << std::endl;
 709   }
 710   catch (...)
 711   {
 712     std::cerr << "unknown exception caught" << std::endl;
 713   }
 714   Object::log (YY_NULL, "end");
 715   assert (Object::empty());
 716   return res;
 717 }
 718 ]])
 719 AT_BISON_CHECK([[-o input.cc --report=all input.yy]])
 720 AT_COMPILE_CXX([[input]])
 721
 722 AT_PARSER_CHECK([[./input aaaas]], [[2]], [[]],
 723 [[exception caught: reduction
 724 ]])
 725
 726 AT_PARSER_CHECK([[./input aaaal]], [[2]], [[]],
 727 [[exception caught: yylex
 728 ]])
 729
 730 AT_PARSER_CHECK([[./input i]], [[2]], [[]],
 731 [[exception caught: initial-action
 732 ]])
 733
 734 AT_PARSER_CHECK([[./input aaaap]])
 735
 736 AT_PARSER_CHECK([[./input --debug aaaap]], [[2]], [[]], [[stderr]])
 737 AT_CHECK([[grep '^exception caught: printer$' stderr]], [], [ignore])
 738
 739 AT_PARSER_CHECK([[./input aaaae]], [[2]], [[]],
 740 [[exception caught: syntax error
 741 ]])
 742
 743 AT_PARSER_CHECK([[./input aaaaE]], [[2]], [[]],
 744 [[exception caught: syntax error, unexpected $end, expecting 'a'
 745 ]])
 746
 747 AT_PARSER_CHECK([[./input aaaaT]], [[1]])
 748
 749 # There is error-recovery, so exit success.
 750 AT_PARSER_CHECK([[./input aaaaR]], [[0]])
 751
 752 AT_BISON_OPTION_POPDEFS
 753
 754 AT_CLEANUP
 755
 756 ## ------------------------------------ ##
 757 ## C++ GLR parser identifier shadowing  ##
 758 ## ------------------------------------ ##
 759
 760 AT_SETUP([[C++ GLR parser identifier shadowing]])
 761
 762 AT_DATA_GRAMMAR([input.yy], [
 763 %skeleton "glr.cc"
 764
 765 %union
 766 {
 767   int ival;
 768 }
 769
 770 %token <ival> ZERO;
 771
 772 %code
 773 {
 774   int yylex (yy::parser::semantic_type *yylval);
 775 }
 776
 777 %%
 778 exp: ZERO
 779
 780 %%
 781
 782 int yylex (yy::parser::semantic_type *yylval)
 783 {
 784   (void) *yylval;
 785   return yy::parser::token::ZERO;
 786 }
 787
 788 void yy::parser::error (std::string const& msg)
 789 {
 790   (void) msg;
 791 }
 792
 793 int main()
 794 {}
 795 ])
 796
 797 AT_BISON_CHECK([[-o input.cc input.yy]])
 798 AT_COMPILE_CXX([[input]])
 799
 800 AT_CLEANUP