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