tests/actions.at

   1 # Executing Actions.                               -*- Autotest -*-
   2 # Copyright (C) 2001, 2002, 2003, 2004, 2005 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 2, or (at your option)
   7 # 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, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17 # 02110-1301, USA.
  18
  19 AT_BANNER([[User Actions.]])
  20
  21 ## ------------------ ##
  22 ## Mid-rule actions.  ##
  23 ## ------------------ ##
  24
  25 AT_SETUP([Mid-rule actions])
  26
  27 # Bison once forgot the mid-rule actions.  It was because the action
  28 # was attached to the host rule (the one with the mid-rule action),
  29 # instead of being attached to the empty rule dedicated to this
  30 # action.
  31
  32 AT_DATA_GRAMMAR([[input.y]],
  33 [[%{
  34 # include <stdio.h>
  35 # include <stdlib.h>
  36   static void yyerror (const char *msg);
  37   static int yylex (void);
  38 # define YYDEBUG         1
  39 # define YYERROR_VERBOSE 1
  40 %}
  41 %%
  42 exp:     { putchar ('0'); }
  43      '1' { putchar ('1'); }
  44      '2' { putchar ('2'); }
  45      '3' { putchar ('3'); }
  46      '4' { putchar ('4'); }
  47      '5' { putchar ('5'); }
  48      '6' { putchar ('6'); }
  49      '7' { putchar ('7'); }
  50      '8' { putchar ('8'); }
  51      '9' { putchar ('9'); }
  52          { putchar ('\n'); }
  53    ;
  54 %%
  55 static int
  56 yylex (void)
  57 {
  58   static const char *input = "123456789";
  59   return *input++;
  60 }
  61
  62 static void
  63 yyerror (const char *msg)
  64 {
  65   fprintf (stderr, "%s\n", msg);
  66 }
  67
  68 int
  69 main (void)
  70 {
  71   return yyparse ();
  72 }
  73 ]])
  74
  75 AT_CHECK([bison -d -v -o input.c input.y])
  76 AT_COMPILE([input])
  77 AT_PARSER_CHECK([./input], 0,
  78 [[0123456789
  79 ]])
  80
  81 AT_CLEANUP
  82
  83
  84
  85
  86
  87 ## ---------------- ##
  88 ## Exotic Dollars.  ##
  89 ## ---------------- ##
  90
  91 AT_SETUP([Exotic Dollars])
  92
  93 AT_DATA_GRAMMAR([[input.y]],
  94 [[%{
  95 # include <stdio.h>
  96 # include <stdlib.h>
  97   static void yyerror (const char *msg);
  98   static int yylex (void);
  99 # define YYDEBUG         1
 100 # define YYERROR_VERBOSE 1
 101 %}
 102
 103 %union
 104 {
 105   int val;
 106 };
 107
 108 %type <val> a_1 a_2 a_5
 109             sum_of_the_five_previous_values
 110
 111 %%
 112 exp: a_1 a_2 { $<val>$ = 3; } { $<val>$ = $<val>3 + 1; } a_5
 113      sum_of_the_five_previous_values
 114     {
 115        printf ("%d\n", $6);
 116     }
 117 ;
 118 a_1: { $$ = 1; };
 119 a_2: { $$ = 2; };
 120 a_5: { $$ = 5; };
 121
 122 sum_of_the_five_previous_values:
 123     {
 124        $$ = $<val>0 + $<val>-1 + $<val>-2 + $<val>-3 + $<val>-4;
 125     }
 126 ;
 127
 128 %%
 129 static int
 130 yylex (void)
 131 {
 132   return EOF;
 133 }
 134
 135 static void
 136 yyerror (const char *msg)
 137 {
 138   fprintf (stderr, "%s\n", msg);
 139 }
 140
 141 int
 142 main (void)
 143 {
 144   return yyparse ();
 145 }
 146 ]])
 147
 148 AT_CHECK([bison -d -v -o input.c input.y])
 149 AT_COMPILE([input])
 150 AT_PARSER_CHECK([./input], 0,
 151 [[15
 152 ]])
 153
 154 AT_CLEANUP
 155
 156
 157
 158 ## -------------------------- ##
 159 ## Printers and Destructors.  ##
 160 ## -------------------------- ##
 161
 162 # _AT_CHECK_PRINTER_AND_DESTRUCTOR($1, $2, $3, $4, BISON-DIRECTIVE, UNION-FLAG)
 163 # -----------------------------------------------------------------------------
 164 m4_define([_AT_CHECK_PRINTER_AND_DESTRUCTOR],
 165 [# Make sure complex $n work.
 166 m4_if([$1$2$3], $[1]$[2]$[3], [],
 167        [m4_fatal([$0: Invalid arguments: $@])])dnl
 168
 169 # Be sure to pass all the %directives to this macro to have correct
 170 # helping macros.  So don't put any directly in the Bison file.
 171 AT_BISON_OPTION_PUSHDEFS([$5])
 172 AT_DATA_GRAMMAR([[input.y]],
 173 [[%{
 174 #include <stdio.h>
 175 #include <stdlib.h>
 176 #include <assert.h>
 177
 178 #define YYINITDEPTH 10
 179 #define YYMAXDEPTH 10
 180 ]AT_LALR1_CC_IF(
 181   [#define RANGE(Location) (Location).begin.line, (Location).end.line],
 182   [#define RANGE(Location) (Location).first_line, (Location).last_line])
 183 [%}
 184
 185 $5]
 186 m4_ifval([$6], [%union
 187 {
 188   int ival;
 189 }])
 190 AT_LALR1_CC_IF([%define "global_tokens_and_yystype"])
 191 [
 192 %{
 193 ]AT_LALR1_CC_IF([typedef yy::location YYLTYPE;
 194                 m4_ifval([$6], , [#define YYSTYPE int])])
 195 [static int yylex (]AT_LEX_FORMALS[);
 196 ]AT_LALR1_CC_IF([], [static void yyerror (const char *msg);])
 197 [%}
 198
 199 ]m4_ifval([$6], [%type <ival> '(' 'x' 'y' ')' ';' thing line input])[
 200
 201 %printer
 202   {
 203     ]AT_LALR1_CC_IF([debug_stream () << $$;],
 204                     [fprintf (yyoutput, "%d", $$)])[;
 205   }
 206   input line thing 'x' 'y'
 207
 208 %destructor
 209   { printf ("Freeing nterm input (%d@%d-%d)\n", $$, RANGE (@$)); }
 210   input
 211
 212 %destructor
 213   { printf ("Freeing nterm line (%d@%d-%d)\n", $$, RANGE (@$)); }
 214   line
 215
 216 %destructor
 217   { printf ("Freeing nterm thing (%d@%d-%d)\n", $$, RANGE (@$)); }
 218   thing
 219
 220 %destructor
 221   { printf ("Freeing token 'x' (%d@%d-%d)\n", $$, RANGE (@$)); }
 222   'x'
 223
 224 %destructor
 225   { printf ("Freeing token 'y' (%d@%d-%d)\n", $$, RANGE (@$)); }
 226   'y'
 227
 228 %%
 229 /*
 230    This grammar is made to exercise error recovery.
 231    "Lines" starting with `(' support error recovery, with
 232    ')' as synchronizing token.  Lines starting with 'x' can never
 233    be recovered from if in error.
 234 */
 235
 236 input:
 237   /* Nothing. */
 238     {
 239       $$ = 0;
 240       printf ("input (%d@%d-%d): /* Nothing */\n", $$, RANGE (@$));
 241     }
 242 | line input /* Right recursive to load the stack so that popping at
 243                 EOF can be exercised.  */
 244     {
 245       $$ = 2;
 246       printf ("input (%d@%d-%d): line (%d@%d-%d) input (%d@%d-%d)\n",
 247               $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2));
 248     }
 249 ;
 250
 251 line:
 252   thing thing thing ';'
 253     {
 254       $$ = $1;
 255       printf ("line (%d@%d-%d): thing (%d@%d-%d) thing (%d@%d-%d) thing (%d@%d-%d) ';' (%d@%d-%d)\n",
 256               $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2),
 257               $3, RANGE (@3), $4, RANGE (@4));
 258     }
 259 | '(' thing thing ')'
 260     {
 261       $$ = $1;
 262       printf ("line (%d@%d-%d): '(' (%d@%d-%d) thing (%d@%d-%d) thing (%d@%d-%d) ')' (%d@%d-%d)\n",
 263               $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2),
 264               $3, RANGE (@3), $4, RANGE (@4));
 265     }
 266 | '(' thing ')'
 267     {
 268       $$ = $1;
 269       printf ("line (%d@%d-%d): '(' (%d@%d-%d) thing (%d@%d-%d) ')' (%d@%d-%d)\n",
 270               $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2), $3, RANGE (@3));
 271     }
 272 | '(' error ')'
 273     {
 274       $$ = -1;
 275       printf ("line (%d@%d-%d): '(' (%d@%d-%d) error (@%d-%d) ')' (%d@%d-%d)\n",
 276               $$, RANGE (@$), $1, RANGE (@1), RANGE (@2), $3, RANGE (@3));
 277     }
 278 ;
 279
 280 thing:
 281   'x'
 282     {
 283       $$ = $1;
 284       printf ("thing (%d@%d-%d): 'x' (%d@%d-%d)\n",
 285               $$, RANGE (@$), $1, RANGE (@1));
 286     }
 287 ;
 288 %%
 289 /* Alias to ARGV[1]. */
 290 const char *source = 0;
 291
 292 static int
 293 yylex (]AT_LEX_FORMALS[)
 294 {
 295   static unsigned int counter = 0;
 296
 297   int c = ]AT_VAL[]m4_ifval([$6], [.ival])[ = counter++;
 298   /* As in BASIC, line numbers go from 10 to 10.  */
 299 ]AT_LALR1_CC_IF(
 300 [ AT_LOC.begin.line = AT_LOC.begin.column = 10 * c;
 301   AT_LOC.end.line = AT_LOC.end.column = AT_LOC.begin.line + 9;
 302 ],
 303 [ AT_LOC.first_line = AT_LOC.first_column = 10 * c;
 304   AT_LOC.last_line = AT_LOC.last_column = AT_LOC.first_line + 9;
 305 ])[
 306
 307   if (source[c])
 308     printf ("sending: '%c'", source[c]);
 309   else
 310     printf ("sending: EOF");
 311   printf (" (%d@%d-%d)\n", c, RANGE (]AT_LOC[));
 312   return source[c];
 313 }
 314
 315 ]AT_LALR1_CC_IF(
 316 [/* A C++ error reporting function. */
 317 void
 318 yy::parser::error (const location& l, const std::string& m)
 319 {
 320   printf ("%d-%d: %s\n", RANGE (l), m.c_str());
 321 }
 322
 323 static bool yydebug;
 324 int
 325 yyparse ()
 326 {
 327   yy::parser parser;
 328   parser.set_debug_level (yydebug);
 329   return parser.parse ();
 330 }
 331 ],
 332 [static void
 333 yyerror (const char *msg)
 334 {
 335   printf ("%d-%d: %s\n", RANGE (yylloc), msg);
 336 }])[
 337
 338 int
 339 main (int argc, const char *argv[])
 340 {
 341   int status;
 342   yydebug = !!getenv ("YYDEBUG");
 343   assert (argc == 2);
 344   source = argv[1];
 345   status = yyparse ();
 346   switch (status)
 347     {
 348       case 0: printf ("Successful parse.\n"); break;
 349       case 1: printf ("Parsing FAILED.\n"); break;
 350       default: printf ("Parsing FAILED (status %d).\n", status); break;
 351     }
 352   return status;
 353 }
 354 ]])
 355
 356 AT_LALR1_CC_IF(
 357   [AT_CHECK([bison -o input.cc input.y])
 358    AT_COMPILE_CXX([input])],
 359   [AT_CHECK([bison -o input.c input.y])
 360    AT_COMPILE([input])])
 361
 362
 363 # Check the location of "empty"
 364 # -----------------------------
 365 # I.e., epsilon-reductions, as in "(x)" which ends by reducing
 366 # an empty "line" nterm.
 367 # FIXME: This location is not satisfying.  Depend on the lookahead?
 368 AT_PARSER_CHECK([./input '(x)'], 0,
 369 [[sending: '(' (0@0-9)
 370 sending: 'x' (1@10-19)
 371 thing (1@10-19): 'x' (1@10-19)
 372 sending: ')' (2@20-29)
 373 line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29)
 374 sending: EOF (3@30-39)
 375 input (0@29-29): /* Nothing */
 376 input (2@0-29): line (0@0-29) input (0@29-29)
 377 Freeing nterm input (2@0-29)
 378 Successful parse.
 379 ]])
 380
 381
 382 # Check locations in error recovery
 383 # ---------------------------------
 384 # '(y)' is an error, but can be recovered from.  But what's the location
 385 # of the error itself ('y'), and of the resulting reduction ('(error)').
 386 AT_PARSER_CHECK([./input '(y)'], 0,
 387 [[sending: '(' (0@0-9)
 388 sending: 'y' (1@10-19)
 389 10-19: syntax error, unexpected 'y', expecting 'x'
 390 Freeing token 'y' (1@10-19)
 391 sending: ')' (2@20-29)
 392 line (-1@0-29): '(' (0@0-9) error (@10-19) ')' (2@20-29)
 393 sending: EOF (3@30-39)
 394 input (0@29-29): /* Nothing */
 395 input (2@0-29): line (-1@0-29) input (0@29-29)
 396 Freeing nterm input (2@0-29)
 397 Successful parse.
 398 ]])
 399
 400
 401 # Syntax errors caught by the parser
 402 # ----------------------------------
 403 # Exercise the discarding of stack top and input until `error'
 404 # can be reduced.
 405 #
 406 #     '(', 'x', 'x', 'x', 'x', 'x', ')',
 407 #
 408 # Load the stack and provoke an error that cannot be caught by the
 409 # grammar, to check that the stack is cleared.  And make sure the
 410 # lookahead is freed.
 411 #
 412 #     '(', 'x', ')',
 413 #     '(', 'x', ')',
 414 #     'y'
 415 AT_PARSER_CHECK([./input '(xxxxx)(x)(x)y'], 1,
 416 [[sending: '(' (0@0-9)
 417 sending: 'x' (1@10-19)
 418 thing (1@10-19): 'x' (1@10-19)
 419 sending: 'x' (2@20-29)
 420 thing (2@20-29): 'x' (2@20-29)
 421 sending: 'x' (3@30-39)
 422 30-39: syntax error, unexpected 'x', expecting ')'
 423 Freeing nterm thing (2@20-29)
 424 Freeing nterm thing (1@10-19)
 425 Freeing token 'x' (3@30-39)
 426 sending: 'x' (4@40-49)
 427 Freeing token 'x' (4@40-49)
 428 sending: 'x' (5@50-59)
 429 Freeing token 'x' (5@50-59)
 430 sending: ')' (6@60-69)
 431 line (-1@0-69): '(' (0@0-9) error (@10-59) ')' (6@60-69)
 432 sending: '(' (7@70-79)
 433 sending: 'x' (8@80-89)
 434 thing (8@80-89): 'x' (8@80-89)
 435 sending: ')' (9@90-99)
 436 line (7@70-99): '(' (7@70-79) thing (8@80-89) ')' (9@90-99)
 437 sending: '(' (10@100-109)
 438 sending: 'x' (11@110-119)
 439 thing (11@110-119): 'x' (11@110-119)
 440 sending: ')' (12@120-129)
 441 line (10@100-129): '(' (10@100-109) thing (11@110-119) ')' (12@120-129)
 442 sending: 'y' (13@130-139)
 443 input (0@129-129): /* Nothing */
 444 input (2@100-129): line (10@100-129) input (0@129-129)
 445 input (2@70-129): line (7@70-99) input (2@100-129)
 446 input (2@0-129): line (-1@0-69) input (2@70-129)
 447 130-139: syntax error, unexpected 'y', expecting $end
 448 Freeing nterm input (2@0-129)
 449 Freeing token 'y' (13@130-139)
 450 Parsing FAILED.
 451 ]])
 452
 453 # Check destruction upon stack overflow
 454 # -------------------------------------
 455 # Upon stack overflow, all symbols on the stack should be destroyed.
 456 # Only check for yacc.c.
 457 AT_YACC_IF([
 458 AT_PARSER_CHECK([./input '(x)(x)(x)(x)(x)(x)(x)'], 2,
 459 [[sending: '(' (0@0-9)
 460 sending: 'x' (1@10-19)
 461 thing (1@10-19): 'x' (1@10-19)
 462 sending: ')' (2@20-29)
 463 line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29)
 464 sending: '(' (3@30-39)
 465 sending: 'x' (4@40-49)
 466 thing (4@40-49): 'x' (4@40-49)
 467 sending: ')' (5@50-59)
 468 line (3@30-59): '(' (3@30-39) thing (4@40-49) ')' (5@50-59)
 469 sending: '(' (6@60-69)
 470 sending: 'x' (7@70-79)
 471 thing (7@70-79): 'x' (7@70-79)
 472 sending: ')' (8@80-89)
 473 line (6@60-89): '(' (6@60-69) thing (7@70-79) ')' (8@80-89)
 474 sending: '(' (9@90-99)
 475 sending: 'x' (10@100-109)
 476 thing (10@100-109): 'x' (10@100-109)
 477 sending: ')' (11@110-119)
 478 line (9@90-119): '(' (9@90-99) thing (10@100-109) ')' (11@110-119)
 479 sending: '(' (12@120-129)
 480 sending: 'x' (13@130-139)
 481 thing (13@130-139): 'x' (13@130-139)
 482 sending: ')' (14@140-149)
 483 line (12@120-149): '(' (12@120-129) thing (13@130-139) ')' (14@140-149)
 484 sending: '(' (15@150-159)
 485 sending: 'x' (16@160-169)
 486 thing (16@160-169): 'x' (16@160-169)
 487 sending: ')' (17@170-179)
 488 line (15@150-179): '(' (15@150-159) thing (16@160-169) ')' (17@170-179)
 489 sending: '(' (18@180-189)
 490 sending: 'x' (19@190-199)
 491 thing (19@190-199): 'x' (19@190-199)
 492 sending: ')' (20@200-209)
 493 200-209: memory exhausted
 494 Freeing nterm thing (19@190-199)
 495 Freeing nterm line (15@150-179)
 496 Freeing nterm line (12@120-149)
 497 Freeing nterm line (9@90-119)
 498 Freeing nterm line (6@60-89)
 499 Freeing nterm line (3@30-59)
 500 Freeing nterm line (0@0-29)
 501 Parsing FAILED (status 2).
 502 ]])
 503 ])
 504
 505 ])
 506
 507
 508 # AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS], [UNION-FLAG], [SKIP_FLAG])
 509 # ---------------------------------------------------------------------------
 510 m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR],
 511 [AT_SETUP([Printers and Destructors $2: $1])
 512
 513 $3
 514 _AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], $[4],
 515 [%error-verbose
 516 %debug
 517 %verbose
 518 %locations
 519 $1], [$2])
 520
 521 AT_CLEANUP
 522 ])
 523
 524
 525 AT_CHECK_PRINTER_AND_DESTRUCTOR([])
 526 AT_CHECK_PRINTER_AND_DESTRUCTOR([], [with union])
 527
 528 # These tests currently fail on a Debian GNU/Linux 3.0r2 x86 host,
 529 # but the 2nd test succeeds on a Solaris 9 sparc hosts (Forte 7 cc).
 530 # Skip them until we figure out what the problem is.
 531 AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"])
 532 AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"], [with union])
 533
 534 AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser])
 535 AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser], [with union])