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