tests/actions.at

   1 # Executing Actions.                               -*- Autotest -*-
   2
   3 # Copyright (C) 2001-2012 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([[User Actions.]])
  19
  20 ## ------------------ ##
  21 ## Mid-rule actions.  ##
  22 ## ------------------ ##
  23
  24 AT_SETUP([Mid-rule actions])
  25
  26 # Bison once forgot the mid-rule actions.  It was because the action
  27 # was attached to the host rule (the one with the mid-rule action),
  28 # instead of being attached to the empty rule dedicated to this
  29 # action.
  30
  31 AT_BISON_OPTION_PUSHDEFS
  32 AT_DATA_GRAMMAR([[input.y]],
  33 [[%error-verbose
  34 %debug
  35 %{
  36 ]AT_YYERROR_DECLARE[
  37 ]AT_YYLEX_DECLARE[
  38 %}
  39 %%
  40 exp:     { putchar ('0'); }
  41      '1' { putchar ('1'); }
  42      '2' { putchar ('2'); }
  43      '3' { putchar ('3'); }
  44      '4' { putchar ('4'); }
  45      '5' { putchar ('5'); }
  46      '6' { putchar ('6'); }
  47      '7' { putchar ('7'); }
  48      '8' { putchar ('8'); }
  49      '9' { putchar ('9'); }
  50          { putchar ('\n'); }
  51    ;
  52 %%
  53 ]AT_YYERROR_DEFINE[
  54 ]AT_YYLEX_DEFINE(["123456789"])[
  55 int
  56 main (void)
  57 {
  58   return yyparse ();
  59 }
  60 ]])
  61 AT_BISON_OPTION_POPDEFS
  62
  63 AT_BISON_CHECK([-d -v -o input.c input.y])
  64 AT_COMPILE([input])
  65 AT_PARSER_CHECK([./input], 0,
  66 [[0123456789
  67 ]])
  68
  69 AT_CLEANUP
  70
  71
  72 ## ------------------ ##
  73 ## Initial location.  ##
  74 ## ------------------ ##
  75
  76 # AT_TEST(SKELETON-NAME, DIRECTIVES)
  77 # ----------------------------------
  78 # Check the the initial location is correct.
  79 m4_pushdef([AT_TEST],
  80 [AT_SETUP([Initial location: $1 $2])
  81
  82 AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1" $2 %parse-param { int x }])
  83 AT_DATA_GRAMMAR([[input.y]],
  84 [[%defines /* FIXME: Required by lalr1.cc in Bison 2.6. */
  85 %locations
  86 %debug
  87 %skeleton "$1"
  88 $2
  89 %parse-param { int x } // Useless, but used to force yyerror purity.
  90 %code
  91 {
  92 # include <stdio.h>
  93 # include <stdlib.h> // getenv
  94 ]AT_YYERROR_DECLARE[
  95 ]AT_YYLEX_DECLARE[
  96 }
  97 %%
  98 exp: { ]AT_SKEL_CC_IF([[std::cerr << @$ << std::endl]],
  99                       [[YY_LOCATION_PRINT(stderr, @$); fputc ('\n', stderr)]])[; }
 100 %%
 101 ]AT_YYERROR_DEFINE[
 102
 103 ]AT_YYLEX_PROTOTYPE[
 104 {]AT_PURE_IF([
 105   YYUSE(lvalp);
 106   YYUSE(llocp);], [AT_SKEL_CC_IF([
 107   YYUSE(lvalp);
 108   YYUSE(llocp);])])[
 109   return 'x';
 110 }
 111
 112 int
 113 main (void)
 114 {]AT_SKEL_CC_IF([[
 115   yy::parser p (0);
 116   p.set_debug_level (!!getenv("YYDEBUG"));
 117   return p.parse ();]], [[
 118   yydebug = !!getenv("YYDEBUG");
 119   return !!yyparse (0);]])[
 120 }
 121 ]])
 122
 123 AT_FULL_COMPILE([input])
 124 AT_PARSER_CHECK([./input], 1, [],
 125 [[1.1
 126 1.1: syntax error
 127 ]])
 128 AT_BISON_OPTION_POPDEFS
 129 AT_CLEANUP
 130 ])
 131
 132 ## FIXME: test Java, and iterate over skeletons.
 133 AT_TEST([yacc.c])
 134 AT_TEST([yacc.c], [%define api.pure])
 135 AT_TEST([yacc.c], [%define api.push-pull both])
 136 AT_TEST([yacc.c], [%define api.push-pull both %define api.pure])
 137 AT_TEST([glr.c])
 138 AT_TEST([lalr1.cc])
 139 AT_TEST([glr.cc])
 140
 141 m4_popdef([AT_TEST])
 142
 143
 144
 145 ## ---------------- ##
 146 ## Exotic Dollars.  ##
 147 ## ---------------- ##
 148
 149 AT_SETUP([Exotic Dollars])
 150
 151 AT_BISON_OPTION_PUSHDEFS
 152 AT_DATA_GRAMMAR([[input.y]],
 153 [[%error-verbose
 154 %debug
 155 %{
 156 ]AT_YYERROR_DECLARE[
 157 ]AT_YYLEX_DECLARE[
 158 # define USE(Var)
 159 %}
 160
 161 %union
 162 {
 163   int val;
 164 };
 165
 166 %type <val> a_1 a_2 a_5
 167             sum_of_the_five_previous_values
 168
 169 %%
 170 exp: a_1 a_2 { $<val>$ = 3; } { $<val>$ = $<val>3 + 1; } a_5
 171      sum_of_the_five_previous_values
 172     {
 173        USE (($1, $2, $<foo>3, $<foo>4, $5));
 174        printf ("%d\n", $6);
 175     }
 176 ;
 177 a_1: { $$ = 1; };
 178 a_2: { $$ = 2; };
 179 a_5: { $$ = 5; };
 180
 181 sum_of_the_five_previous_values:
 182     {
 183        $$ = $<val>0 + $<val>-1 + $<val>-2 + $<val>-3 + $<val>-4;
 184     }
 185 ;
 186
 187 %%
 188 ]AT_YYERROR_DEFINE[
 189 ]AT_YYLEX_DEFINE[
 190 int
 191 main (void)
 192 {
 193   return yyparse ();
 194 }
 195 ]])
 196
 197 AT_BISON_CHECK([-d -v -o input.c input.y], 0)
 198 AT_COMPILE([input])
 199 AT_PARSER_CHECK([./input], 0,
 200 [[15
 201 ]])
 202
 203 # Make sure that fields after $n or $-n are parsed correctly.  At one
 204 # point while implementing dashes in symbol names, we were dropping
 205 # fields after $-n.
 206 AT_DATA_GRAMMAR([[input.y]],
 207 [[
 208 %{
 209 #include <stdio.h>
 210 ]AT_YYERROR_DECLARE[
 211 ]AT_YYLEX_DECLARE[
 212   typedef struct { int val; } stype;
 213 # define YYSTYPE stype
 214 %}
 215
 216 %%
 217 start: one two { $$.val = $1.val + $2.val; } sum ;
 218 one: { $$.val = 1; } ;
 219 two: { $$.val = 2; } ;
 220 sum: { printf ("%d\n", $0.val + $-1.val + $-2.val); } ;
 221
 222 %%
 223 ]AT_YYERROR_DEFINE[
 224 ]AT_YYLEX_DEFINE[
 225 int
 226 main (void)
 227 {
 228   return yyparse ();
 229 }
 230 ]])
 231
 232 AT_FULL_COMPILE([input])
 233 AT_PARSER_CHECK([[./input]], [[0]],
 234 [[6
 235 ]])
 236
 237 AT_BISON_OPTION_POPDEFS
 238 AT_CLEANUP
 239
 240
 241
 242 ## -------------------------- ##
 243 ## Printers and Destructors.  ##
 244 ## -------------------------- ##
 245
 246 # _AT_CHECK_PRINTER_AND_DESTRUCTOR($1, $2, $3, $4,
 247 #                                  BISON-DIRECTIVE, UNION-FLAG)
 248 # -------------------------------------------------------------
 249 m4_define([_AT_CHECK_PRINTER_AND_DESTRUCTOR],
 250 [# Make sure complex $n work.
 251 m4_if([$1$2$3$4], $[1]$[2]$[3]$[4], [],
 252        [m4_fatal([$0: Invalid arguments: $@])])dnl
 253
 254 # Be sure to pass all the %directives to this macro to have correct
 255 # helping macros.  So don't put any directly in the Bison file.
 256 AT_BISON_OPTION_PUSHDEFS([$5])
 257 AT_DATA_GRAMMAR([[input.y]],
 258 [[%code requires {
 259 #include <stdio.h>
 260 #include <stdlib.h>
 261 #include <string.h>
 262 #include <assert.h>
 263
 264 #define YYINITDEPTH 10
 265 #define YYMAXDEPTH 10
 266 #define RANGE(Location) ]AT_LALR1_CC_IF([(Location).begin.line, (Location).end.line],
 267       [(Location).first_line, (Location).last_line])[
 268
 269 /* Display the symbol type Symbol.  */
 270 #define V(Symbol, Value, Location, Sep) \
 271    fprintf (stderr, #Symbol " (%d@%d-%d)" Sep, Value, RANGE(Location))
 272 }
 273
 274 $5
 275 ]m4_ifval([$6], [%union
 276 {
 277   int ival;
 278 }])
 279 AT_LALR1_CC_IF([%define global_tokens_and_yystype])
 280 m4_ifval([$6], [[%code provides {]], [[%code {]])
 281 AT_LALR1_CC_IF([typedef yy::location YYLTYPE;])[
 282 ]AT_YYLEX_DECLARE[
 283 ]AT_LALR1_CC_IF([], [AT_YYERROR_DECLARE])
 284 [}
 285
 286 ]m4_ifval([$6], [%type <ival> '(' 'x' 'y' ')' ';' thing line input END])[
 287
 288 /* FIXME: This %printer isn't actually tested.  */
 289 %printer
 290   {
 291     ]AT_LALR1_CC_IF([debug_stream () << $$;],
 292                     [fprintf (yyoutput, "%d", $$)])[;
 293   }
 294   input line thing 'x' 'y'
 295
 296 %destructor
 297   { fprintf (stderr, "Freeing nterm input (%d@%d-%d)\n", $$, RANGE (@$)); }
 298   input
 299
 300 %destructor
 301   { fprintf (stderr, "Freeing nterm line (%d@%d-%d)\n", $$, RANGE (@$)); }
 302   line
 303
 304 %destructor
 305   { fprintf (stderr, "Freeing nterm thing (%d@%d-%d)\n", $$, RANGE (@$)); }
 306   thing
 307
 308 %destructor
 309   { fprintf (stderr, "Freeing token 'x' (%d@%d-%d)\n", $$, RANGE (@$)); }
 310   'x'
 311
 312 %destructor
 313   { fprintf (stderr, "Freeing token 'y' (%d@%d-%d)\n", $$, RANGE (@$)); }
 314   'y'
 315
 316 %token END 0
 317 %destructor
 318   { fprintf (stderr, "Freeing token END (%d@%d-%d)\n", $$, RANGE (@$)); }
 319   END
 320
 321 %%
 322 /*
 323    This grammar is made to exercise error recovery.
 324    "Lines" starting with `(' support error recovery, with
 325    ')' as synchronizing token.  Lines starting with 'x' can never
 326    be recovered from if in error.
 327 */
 328
 329 input:
 330   /* Nothing. */
 331     {
 332       $$ = 0;
 333       V(input, $$, @$, ": /* Nothing */\n");
 334     }
 335 | line input /* Right recursive to load the stack so that popping at
 336                 END can be exercised.  */
 337     {
 338       $$ = 2;
 339       V(input, $$, @$, ": ");
 340       V(line,  $1, @1, " ");
 341       V(input, $2, @2, "\n");
 342     }
 343 ;
 344
 345 line:
 346   thing thing thing ';'
 347     {
 348       $$ = $1;
 349       V(line,  $$, @$, ": ");
 350       V(thing, $1, @1, " ");
 351       V(thing, $2, @2, " ");
 352       V(thing, $3, @3, " ");
 353       V(;,     $4, @4, "\n");
 354     }
 355 | '(' thing thing ')'
 356     {
 357       $$ = $1;
 358       V(line,  $$, @$, ": ");
 359       V('(',   $1, @1, " ");
 360       V(thing, $2, @2, " ");
 361       V(thing, $3, @3, " ");
 362       V(')',   $4, @4, "\n");
 363     }
 364 | '(' thing ')'
 365     {
 366       $$ = $1;
 367       V(line,  $$, @$, ": ");
 368       V('(',   $1, @1, " ");
 369       V(thing, $2, @2, " ");
 370       V(')',   $3, @3, "\n");
 371     }
 372 | '(' error ')'
 373     {
 374       $$ = -1;
 375       V(line,  $$, @$, ": ");
 376       V('(',   $1, @1, " ");
 377       fprintf (stderr, "error (@%d-%d) ", RANGE (@2));
 378       V(')',   $3, @3, "\n");
 379     }
 380 ;
 381
 382 thing:
 383   'x'
 384     {
 385       $$ = $1;
 386       V(thing, $$, @$, ": ");
 387       V('x',   $1, @1, "\n");
 388     }
 389 ;
 390 %%
 391 /* Alias to ARGV[1]. */
 392 const char *source = YY_NULL;
 393
 394 ]AT_YYERROR_DEFINE[
 395
 396 static
 397 ]AT_YYLEX_PROTOTYPE[
 398 {
 399   static unsigned int counter = 0;
 400
 401   int c = ]AT_VAL[]m4_ifval([$6], [.ival])[ = counter++;
 402   /* As in BASIC, line numbers go from 10 to 10.  */
 403   ]AT_LOC_FIRST_LINE[ = ]AT_LOC_FIRST_COLUMN[ = 10 * c;
 404   ]AT_LOC_LAST_LINE[ = ]AT_LOC_LAST_COLUMN[ = ]AT_LOC_FIRST_LINE[ + 9;
 405   assert (0 <= c && c <= strlen (source));
 406   if (source[c])
 407     fprintf (stderr, "sending: '%c'", source[c]);
 408   else
 409     fprintf (stderr, "sending: END");
 410   fprintf (stderr, " (%d@%d-%d)\n", c, RANGE (]AT_LOC[));
 411   return source[c];
 412 }
 413 ]AT_LALR1_CC_IF(
 414 [static bool yydebug;
 415 int
 416 yyparse ()
 417 {
 418   yy::parser parser;
 419   parser.set_debug_level (yydebug);
 420   return parser.parse ();
 421 }
 422 ])[
 423
 424 int
 425 main (int argc, const char *argv[])
 426 {
 427   int status;
 428   yydebug = !!getenv ("YYDEBUG");
 429   assert (argc == 2);
 430   source = argv[1];
 431   status = yyparse ();
 432   switch (status)
 433     {
 434       case 0: fprintf (stderr, "Successful parse.\n"); break;
 435       case 1: fprintf (stderr, "Parsing FAILED.\n"); break;
 436       default: fprintf (stderr, "Parsing FAILED (status %d).\n", status); break;
 437     }
 438   return status;
 439 }
 440 ]])
 441
 442 AT_FULL_COMPILE([input])
 443
 444
 445 # Check the location of "empty"
 446 # -----------------------------
 447 # I.e., epsilon-reductions, as in "(x)" which ends by reducing
 448 # an empty "line" nterm.
 449 # FIXME: This location is not satisfying.  Depend on the lookahead?
 450 AT_PARSER_CHECK([./input '(x)'], 0, [],
 451 [[sending: '(' (0@0-9)
 452 sending: 'x' (1@10-19)
 453 thing (1@10-19): 'x' (1@10-19)
 454 sending: ')' (2@20-29)
 455 line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29)
 456 sending: END (3@30-39)
 457 input (0@29-29): /* Nothing */
 458 input (2@0-29): line (0@0-29) input (0@29-29)
 459 Freeing token END (3@30-39)
 460 Freeing nterm input (2@0-29)
 461 Successful parse.
 462 ]])
 463
 464
 465 # Check locations in error recovery
 466 # ---------------------------------
 467 # '(y)' is an error, but can be recovered from.  But what's the location
 468 # of the error itself ('y'), and of the resulting reduction ('(error)').
 469 AT_PARSER_CHECK([./input '(y)'], 0, [],
 470 [[sending: '(' (0@0-9)
 471 sending: 'y' (1@10-19)
 472 10.10-19.18: syntax error, unexpected 'y', expecting 'x'
 473 Freeing token 'y' (1@10-19)
 474 sending: ')' (2@20-29)
 475 line (-1@0-29): '(' (0@0-9) error (@10-19) ')' (2@20-29)
 476 sending: END (3@30-39)
 477 input (0@29-29): /* Nothing */
 478 input (2@0-29): line (-1@0-29) input (0@29-29)
 479 Freeing token END (3@30-39)
 480 Freeing nterm input (2@0-29)
 481 Successful parse.
 482 ]])
 483
 484
 485 # Syntax errors caught by the parser
 486 # ----------------------------------
 487 # Exercise the discarding of stack top and input until `error'
 488 # can be reduced.
 489 #
 490 #     '(', 'x', 'x', 'x', 'x', 'x', ')',
 491 #
 492 # Load the stack and provoke an error that cannot be caught by the
 493 # grammar, to check that the stack is cleared.  And make sure the
 494 # lookahead is freed.
 495 #
 496 #     '(', 'x', ')',
 497 #     '(', 'x', ')',
 498 #     'y'
 499 AT_PARSER_CHECK([./input '(xxxxx)(x)(x)y'], 1, [],
 500 [[sending: '(' (0@0-9)
 501 sending: 'x' (1@10-19)
 502 thing (1@10-19): 'x' (1@10-19)
 503 sending: 'x' (2@20-29)
 504 thing (2@20-29): 'x' (2@20-29)
 505 sending: 'x' (3@30-39)
 506 30.30-39.38: syntax error, unexpected 'x', expecting ')'
 507 Freeing nterm thing (2@20-29)
 508 Freeing nterm thing (1@10-19)
 509 Freeing token 'x' (3@30-39)
 510 sending: 'x' (4@40-49)
 511 Freeing token 'x' (4@40-49)
 512 sending: 'x' (5@50-59)
 513 Freeing token 'x' (5@50-59)
 514 sending: ')' (6@60-69)
 515 line (-1@0-69): '(' (0@0-9) error (@10-59) ')' (6@60-69)
 516 sending: '(' (7@70-79)
 517 sending: 'x' (8@80-89)
 518 thing (8@80-89): 'x' (8@80-89)
 519 sending: ')' (9@90-99)
 520 line (7@70-99): '(' (7@70-79) thing (8@80-89) ')' (9@90-99)
 521 sending: '(' (10@100-109)
 522 sending: 'x' (11@110-119)
 523 thing (11@110-119): 'x' (11@110-119)
 524 sending: ')' (12@120-129)
 525 line (10@100-129): '(' (10@100-109) thing (11@110-119) ')' (12@120-129)
 526 sending: 'y' (13@130-139)
 527 input (0@129-129): /* Nothing */
 528 input (2@100-129): line (10@100-129) input (0@129-129)
 529 input (2@70-129): line (7@70-99) input (2@100-129)
 530 input (2@0-129): line (-1@0-69) input (2@70-129)
 531 130.130-139.138: syntax error, unexpected 'y', expecting END
 532 Freeing nterm input (2@0-129)
 533 Freeing token 'y' (13@130-139)
 534 Parsing FAILED.
 535 ]])
 536
 537
 538 # Syntax error caught by the parser where lookahead = END
 539 # --------------------------------------------------------
 540 # Load the stack and provoke an error that cannot be caught by the
 541 # grammar, to check that the stack is cleared.  And make sure the
 542 # lookahead is freed.
 543 #
 544 #     '(', 'x', ')',
 545 #     '(', 'x', ')',
 546 #     'x'
 547 AT_PARSER_CHECK([./input '(x)(x)x'], 1, [],
 548 [[sending: '(' (0@0-9)
 549 sending: 'x' (1@10-19)
 550 thing (1@10-19): 'x' (1@10-19)
 551 sending: ')' (2@20-29)
 552 line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29)
 553 sending: '(' (3@30-39)
 554 sending: 'x' (4@40-49)
 555 thing (4@40-49): 'x' (4@40-49)
 556 sending: ')' (5@50-59)
 557 line (3@30-59): '(' (3@30-39) thing (4@40-49) ')' (5@50-59)
 558 sending: 'x' (6@60-69)
 559 thing (6@60-69): 'x' (6@60-69)
 560 sending: END (7@70-79)
 561 70.70-79.78: syntax error, unexpected END, expecting 'x'
 562 Freeing nterm thing (6@60-69)
 563 Freeing nterm line (3@30-59)
 564 Freeing nterm line (0@0-29)
 565 Freeing token END (7@70-79)
 566 Parsing FAILED.
 567 ]])
 568
 569
 570 # Check destruction upon stack overflow
 571 # -------------------------------------
 572 # Upon stack overflow, all symbols on the stack should be destroyed.
 573 # Only check for yacc.c.
 574 AT_YACC_IF([
 575 AT_PARSER_CHECK([./input '(x)(x)(x)(x)(x)(x)(x)'], 2, [],
 576 [[sending: '(' (0@0-9)
 577 sending: 'x' (1@10-19)
 578 thing (1@10-19): 'x' (1@10-19)
 579 sending: ')' (2@20-29)
 580 line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29)
 581 sending: '(' (3@30-39)
 582 sending: 'x' (4@40-49)
 583 thing (4@40-49): 'x' (4@40-49)
 584 sending: ')' (5@50-59)
 585 line (3@30-59): '(' (3@30-39) thing (4@40-49) ')' (5@50-59)
 586 sending: '(' (6@60-69)
 587 sending: 'x' (7@70-79)
 588 thing (7@70-79): 'x' (7@70-79)
 589 sending: ')' (8@80-89)
 590 line (6@60-89): '(' (6@60-69) thing (7@70-79) ')' (8@80-89)
 591 sending: '(' (9@90-99)
 592 sending: 'x' (10@100-109)
 593 thing (10@100-109): 'x' (10@100-109)
 594 sending: ')' (11@110-119)
 595 line (9@90-119): '(' (9@90-99) thing (10@100-109) ')' (11@110-119)
 596 sending: '(' (12@120-129)
 597 sending: 'x' (13@130-139)
 598 thing (13@130-139): 'x' (13@130-139)
 599 sending: ')' (14@140-149)
 600 line (12@120-149): '(' (12@120-129) thing (13@130-139) ')' (14@140-149)
 601 sending: '(' (15@150-159)
 602 sending: 'x' (16@160-169)
 603 thing (16@160-169): 'x' (16@160-169)
 604 sending: ')' (17@170-179)
 605 line (15@150-179): '(' (15@150-159) thing (16@160-169) ')' (17@170-179)
 606 sending: '(' (18@180-189)
 607 sending: 'x' (19@190-199)
 608 thing (19@190-199): 'x' (19@190-199)
 609 sending: ')' (20@200-209)
 610 200.200-209.208: memory exhausted
 611 Freeing nterm thing (19@190-199)
 612 Freeing nterm line (15@150-179)
 613 Freeing nterm line (12@120-149)
 614 Freeing nterm line (9@90-119)
 615 Freeing nterm line (6@60-89)
 616 Freeing nterm line (3@30-59)
 617 Freeing nterm line (0@0-29)
 618 Parsing FAILED (status 2).
 619 ]])
 620 ])
 621
 622 AT_BISON_OPTION_POPDEFS
 623 ])# _AT_CHECK_PRINTER_AND_DESTRUCTOR
 624
 625
 626 # AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS], [UNION-FLAG], [SKIP_FLAG])
 627 # ---------------------------------------------------------------------------
 628 m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR],
 629 [AT_SETUP([Printers and Destructors$2]m4_ifval([$1], [[: $1]]))
 630
 631 $3
 632 _AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], $[4],
 633 [%error-verbose
 634 %debug
 635 %verbose
 636 %locations
 637 $1], [$2])
 638
 639 AT_CLEANUP
 640 ])
 641
 642
 643 AT_CHECK_PRINTER_AND_DESTRUCTOR([])
 644 AT_CHECK_PRINTER_AND_DESTRUCTOR([], [ with union])
 645
 646 AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"])
 647 AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"], [ with union])
 648
 649 AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser])
 650 AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser], [ with union])
 651
 652
 653
 654 ## ----------------------------------------- ##
 655 ## Default tagless %printer and %destructor. ##
 656 ## ----------------------------------------- ##
 657
 658 # Check that the right %printer and %destructor are called, that they're not
 659 # called for $end, and that $$ and @$ work correctly.
 660
 661 AT_SETUP([Default tagless %printer and %destructor])
 662 AT_BISON_OPTION_PUSHDEFS([%locations])
 663 AT_DATA_GRAMMAR([[input.y]],
 664 [[%error-verbose
 665 %debug
 666 %locations
 667
 668 %{
 669 # include <stdio.h>
 670 # include <stdlib.h>
 671 ]AT_YYLEX_DECLARE[
 672 ]AT_YYERROR_DECLARE[
 673 # define USE(SYM)
 674 %}
 675
 676 %printer {
 677   fprintf (yyoutput, "<*> printer should not be called.\n");
 678 } <*>
 679
 680 %printer {
 681   fprintf (yyoutput, "<> printer for '%c' @ %d", $$, @$.first_column);
 682 } <>
 683 %destructor {
 684   fprintf (stdout, "<> destructor for '%c' @ %d.\n", $$, @$.first_column);
 685 } <>
 686
 687 %printer {
 688   fprintf (yyoutput, "'b'/'c' printer for '%c' @ %d", $$, @$.first_column);
 689 } 'b' 'c'
 690 %destructor {
 691   fprintf (stdout, "'b'/'c' destructor for '%c' @ %d.\n", $$, @$.first_column);
 692 } 'b' 'c'
 693
 694 %destructor {
 695   fprintf (yyoutput, "<*> destructor should not be called.\n");
 696 } <*>
 697
 698 %%
 699
 700 start: 'a' 'b' 'c' 'd' 'e' { $$ = 'S'; USE(($1, $2, $3, $4, $5)); } ;
 701
 702 %%
 703 ]AT_YYERROR_DEFINE[
 704 ]AT_YYLEX_DEFINE(["abcd"], [[yylval = res]])[
 705
 706 int
 707 main (void)
 708 {
 709   yydebug = 1;
 710   return yyparse ();
 711 }
 712 ]])
 713
 714 AT_BISON_CHECK([-o input.c input.y])
 715 AT_COMPILE([input])
 716 AT_PARSER_CHECK([./input], 1,
 717 [[<> destructor for 'd' @ 4.
 718 'b'/'c' destructor for 'c' @ 3.
 719 'b'/'c' destructor for 'b' @ 2.
 720 <> destructor for 'a' @ 1.
 721 ]],
 722 [[Starting parse
 723 Entering state 0
 724 Reading a token: Next token is token 'a' (1.1: <> printer for 'a' @ 1)
 725 Shifting token 'a' (1.1: <> printer for 'a' @ 1)
 726 Entering state 1
 727 Reading a token: Next token is token 'b' (1.2: 'b'/'c' printer for 'b' @ 2)
 728 Shifting token 'b' (1.2: 'b'/'c' printer for 'b' @ 2)
 729 Entering state 3
 730 Reading a token: Next token is token 'c' (1.3: 'b'/'c' printer for 'c' @ 3)
 731 Shifting token 'c' (1.3: 'b'/'c' printer for 'c' @ 3)
 732 Entering state 5
 733 Reading a token: Next token is token 'd' (1.4: <> printer for 'd' @ 4)
 734 Shifting token 'd' (1.4: <> printer for 'd' @ 4)
 735 Entering state 6
 736 Reading a token: Now at end of input.
 737 1.5: syntax error, unexpected $end, expecting 'e'
 738 Error: popping token 'd' (1.4: <> printer for 'd' @ 4)
 739 Stack now 0 1 3 5
 740 Error: popping token 'c' (1.3: 'b'/'c' printer for 'c' @ 3)
 741 Stack now 0 1 3
 742 Error: popping token 'b' (1.2: 'b'/'c' printer for 'b' @ 2)
 743 Stack now 0 1
 744 Error: popping token 'a' (1.1: <> printer for 'a' @ 1)
 745 Stack now 0
 746 Cleanup: discarding lookahead token $end (1.5: )
 747 Stack now 0
 748 ]])
 749
 750 AT_BISON_OPTION_POPDEFS
 751 AT_CLEANUP
 752
 753
 754
 755 ## ------------------------------------------------------ ##
 756 ## Default tagged and per-type %printer and %destructor.  ##
 757 ## ------------------------------------------------------ ##
 758
 759 AT_SETUP([Default tagged and per-type %printer and %destructor])
 760 AT_BISON_OPTION_PUSHDEFS
 761 AT_DATA_GRAMMAR([[input.y]],
 762 [[%error-verbose
 763 %debug
 764
 765 %{
 766 # include <stdio.h>
 767 # include <stdlib.h>
 768 ]AT_YYERROR_DECLARE[
 769 ]AT_YYLEX_DECLARE[
 770 # define USE(SYM)
 771 %}
 772
 773 %printer {
 774   fprintf (yyoutput, "<> printer should not be called.\n");
 775 } <>
 776
 777 %union { int field0; int field1; int field2; }
 778 %type <field0> start 'a' 'g'
 779 %type <field1> 'e'
 780 %type <field2> 'f'
 781 %printer {
 782   fprintf (yyoutput, "<*>/<field2>/e printer");
 783 } <*> 'e' <field2>
 784 %destructor {
 785   fprintf (stdout, "<*>/<field2>/e destructor.\n");
 786 } <*> 'e' <field2>
 787
 788 %type <field1> 'b'
 789 %printer { fprintf (yyoutput, "<field1> printer"); } <field1>
 790 %destructor { fprintf (stdout, "<field1> destructor.\n"); } <field1>
 791
 792 %type <field0> 'c'
 793 %printer { fprintf (yyoutput, "'c' printer"); } 'c'
 794 %destructor { fprintf (stdout, "'c' destructor.\n"); } 'c'
 795
 796 %type <field1> 'd'
 797 %printer { fprintf (yyoutput, "'d' printer"); } 'd'
 798 %destructor { fprintf (stdout, "'d' destructor.\n"); } 'd'
 799
 800 %destructor {
 801   fprintf (yyoutput, "<> destructor should not be called.\n");
 802 } <>
 803
 804 %%
 805
 806 start:
 807   'a' 'b' 'c' 'd' 'e' 'f' 'g'
 808     {
 809       USE(($1, $2, $3, $4, $5, $6, $7));
 810       $$ = 'S';
 811     }
 812   ;
 813
 814 %%
 815 ]AT_YYERROR_DEFINE[
 816 ]AT_YYLEX_DEFINE(["abcdef"])[
 817
 818 int
 819 main (void)
 820 {
 821   yydebug = 1;
 822   return yyparse ();
 823 }
 824 ]])
 825
 826 AT_BISON_CHECK([-o input.c input.y])
 827 AT_COMPILE([input])
 828 AT_PARSER_CHECK([./input], 1,
 829 [[<*>/<field2>/e destructor.
 830 <*>/<field2>/e destructor.
 831 'd' destructor.
 832 'c' destructor.
 833 <field1> destructor.
 834 <*>/<field2>/e destructor.
 835 ]],
 836 [[Starting parse
 837 Entering state 0
 838 Reading a token: Next token is token 'a' (<*>/<field2>/e printer)
 839 Shifting token 'a' (<*>/<field2>/e printer)
 840 Entering state 1
 841 Reading a token: Next token is token 'b' (<field1> printer)
 842 Shifting token 'b' (<field1> printer)
 843 Entering state 3
 844 Reading a token: Next token is token 'c' ('c' printer)
 845 Shifting token 'c' ('c' printer)
 846 Entering state 5
 847 Reading a token: Next token is token 'd' ('d' printer)
 848 Shifting token 'd' ('d' printer)
 849 Entering state 6
 850 Reading a token: Next token is token 'e' (<*>/<field2>/e printer)
 851 Shifting token 'e' (<*>/<field2>/e printer)
 852 Entering state 7
 853 Reading a token: Next token is token 'f' (<*>/<field2>/e printer)
 854 Shifting token 'f' (<*>/<field2>/e printer)
 855 Entering state 8
 856 Reading a token: Now at end of input.
 857 syntax error, unexpected $end, expecting 'g'
 858 Error: popping token 'f' (<*>/<field2>/e printer)
 859 Stack now 0 1 3 5 6 7
 860 Error: popping token 'e' (<*>/<field2>/e printer)
 861 Stack now 0 1 3 5 6
 862 Error: popping token 'd' ('d' printer)
 863 Stack now 0 1 3 5
 864 Error: popping token 'c' ('c' printer)
 865 Stack now 0 1 3
 866 Error: popping token 'b' (<field1> printer)
 867 Stack now 0 1
 868 Error: popping token 'a' (<*>/<field2>/e printer)
 869 Stack now 0
 870 Cleanup: discarding lookahead token $end ()
 871 Stack now 0
 872 ]])
 873
 874 AT_BISON_OPTION_POPDEFS
 875 AT_CLEANUP
 876
 877
 878
 879 ## ------------------------------------------------------------- ##
 880 ## Default %printer and %destructor for user-defined end token.  ##
 881 ## ------------------------------------------------------------- ##
 882
 883 AT_SETUP([Default %printer and %destructor for user-defined end token])
 884
 885 # _AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN(TYPED)
 886 # -------------------------------------------------------------
 887 m4_define([_AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN],
 888 [m4_if($1, 0,
 889   [m4_pushdef([kind], []) m4_pushdef([not_kind], [*])],
 890   [m4_pushdef([kind], [*]) m4_pushdef([not_kind], [])])
 891
 892 AT_BISON_OPTION_PUSHDEFS([%locations])
 893 AT_DATA_GRAMMAR([[input]]$1[[.y]],
 894 [[%error-verbose
 895 %debug
 896 %locations
 897 %initial-action {
 898   @$.first_line = @$.last_line = 1;
 899   @$.first_column = @$.last_column = 1;
 900 }
 901
 902 %{
 903 # include <stdio.h>
 904 # include <stdlib.h>
 905 ]AT_YYERROR_DECLARE[
 906 ]AT_YYLEX_DECLARE[
 907 # define USE(SYM)
 908 %}
 909
 910 %destructor {
 911   fprintf (yyoutput, "<]]not_kind[[> destructor should not be called.\n");
 912 } <]]not_kind[[>
 913
 914 %token END 0
 915 %printer {
 916   fprintf (yyoutput, "<]]kind[[> for '%c' @ %d", $$, @$.first_column);
 917 } <]]kind[[>
 918 %destructor {
 919   fprintf (stdout, "<]]kind[[> for '%c' @ %d.\n", $$, @$.first_column);
 920 } <]]kind[[>
 921
 922 %printer {
 923   fprintf (yyoutput, "<]]not_kind[[> printer should not be called.\n");
 924 } <]]not_kind[[>
 925
 926 ]]m4_if($1, 0, [[[
 927 ]]],
 928 [[[%union { char tag; }
 929 %type <tag> start END]]])[[
 930
 931 %%
 932
 933 start: { $$ = 'S'; } ;
 934
 935 %%
 936
 937 static int
 938 yylex (void)
 939 {
 940   static int called;
 941   if (called++)
 942     abort ();
 943   yylval]]m4_if($1, 0,, [[[.tag]]])[[ = 'E';
 944   yylloc.first_line = yylloc.last_line = 1;
 945   yylloc.first_column = yylloc.last_column = 1;
 946   return 0;
 947 }
 948 ]AT_YYERROR_DEFINE[
 949
 950 int
 951 main (void)
 952 {
 953   yydebug = 1;
 954   return yyparse ();
 955 }
 956 ]])
 957 AT_BISON_OPTION_POPDEFS
 958
 959 AT_BISON_CHECK([-o input$1.c input$1.y])
 960 AT_COMPILE([input$1])
 961 AT_PARSER_CHECK([./input$1], 0,
 962 [[<]]kind[[> for 'E' @ 1.
 963 <]]kind[[> for 'S' @ 1.
 964 ]],
 965 [[Starting parse
 966 Entering state 0
 967 Reducing stack by rule 1 (line 46):
 968 -> $$ = nterm start (1.1: <]]kind[[> for 'S' @ 1)
 969 Stack now 0
 970 Entering state 1
 971 Reading a token: Now at end of input.
 972 Shifting token END (1.1: <]]kind[[> for 'E' @ 1)
 973 Entering state 2
 974 Stack now 0 1 2
 975 Cleanup: popping token END (1.1: <]]kind[[> for 'E' @ 1)
 976 Cleanup: popping nterm start (1.1: <]]kind[[> for 'S' @ 1)
 977 ]])
 978
 979 m4_popdef([kind])
 980 m4_popdef([not_kind])
 981 ])
 982
 983 _AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN(0)
 984 _AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN(1)
 985
 986 AT_CLEANUP
 987
 988
 989
 990 ## ------------------------------------------------------------------ ##
 991 ## Default %printer and %destructor are not for error or $undefined.  ##
 992 ## ------------------------------------------------------------------ ##
 993
 994 AT_SETUP([Default %printer and %destructor are not for error or $undefined])
 995
 996 # If Bison were to apply the default %printer and %destructor to the error
 997 # token or to $undefined:
 998 #   - For the error token:
 999 #     - It would generate warnings for unused $n.
1000 #     - It would invoke the %printer and %destructor on the error token's
1001 #       semantic value, which would be initialized from the lookahead, which
1002 #       would be destroyed separately.
1003 #   - For $undefined, who knows what the semantic value would be.
1004 AT_BISON_OPTION_PUSHDEFS
1005 AT_DATA_GRAMMAR([[input.y]],
1006 [[%debug
1007
1008 %{
1009 # include <stdio.h>
1010 # include <stdlib.h>
1011 ]AT_YYERROR_DECLARE[
1012 ]AT_YYLEX_DECLARE[
1013 # define USE(SYM)
1014 %}
1015
1016 %printer {
1017   fprintf (yyoutput, "'%c'", $$);
1018 } <> <*>
1019 %destructor {
1020   fprintf (stderr, "DESTROY '%c'\n", $$);
1021 } <> <*>
1022
1023 %%
1024
1025 start:
1026   { $$ = 'S'; }
1027   /* In order to reveal the problems that this bug caused during parsing, add
1028    * $2 to USE.  */
1029   | 'a' error 'b' 'c' { USE(($1, $3, $4)); $$ = 'S'; }
1030   ;
1031
1032 %%
1033 ]AT_YYERROR_DEFINE[
1034 ]AT_YYLEX_DEFINE(["abd"], [yylval = res])[
1035 int
1036 main (void)
1037 {
1038   yydebug = 1;
1039   return yyparse ();
1040 }
1041 ]])
1042 AT_BISON_OPTION_POPDEFS
1043
1044 AT_BISON_CHECK([-o input.c input.y])
1045 AT_COMPILE([input])
1046 AT_PARSER_CHECK([./input], [1], [],
1047 [[Starting parse
1048 Entering state 0
1049 Reading a token: Next token is token 'a' ('a')
1050 Shifting token 'a' ('a')
1051 Entering state 1
1052 Reading a token: Next token is token 'b' ('b')
1053 syntax error
1054 Shifting token error ()
1055 Entering state 3
1056 Next token is token 'b' ('b')
1057 Shifting token 'b' ('b')
1058 Entering state 5
1059 Reading a token: Next token is token $undefined ()
1060 Error: popping token 'b' ('b')
1061 DESTROY 'b'
1062 Stack now 0 1 3
1063 Error: popping token error ()
1064 Stack now 0 1
1065 Shifting token error ()
1066 Entering state 3
1067 Next token is token $undefined ()
1068 Error: discarding token $undefined ()
1069 Error: popping token error ()
1070 Stack now 0 1
1071 Shifting token error ()
1072 Entering state 3
1073 Reading a token: Now at end of input.
1074 Cleanup: discarding lookahead token $end ()
1075 Stack now 0 1 3
1076 Cleanup: popping token error ()
1077 Cleanup: popping token 'a' ('a')
1078 DESTROY 'a'
1079 ]])
1080
1081 AT_CLEANUP
1082
1083
1084
1085 ## ------------------------------------------------------ ##
1086 ## Default %printer and %destructor are not for $accept.  ##
1087 ## ------------------------------------------------------ ##
1088
1089 AT_SETUP([Default %printer and %destructor are not for $accept])
1090
1091 # If YYSTYPE is a union and Bison were to apply the default %printer and
1092 # %destructor to $accept:
1093 #   - The %printer and %destructor code generated for $accept would always be
1094 #     dead code because $accept is currently never shifted onto the stack.
1095 #   - $$ for $accept would always be of type YYSTYPE because it's not possible
1096 #     to declare `%type <field> $accept'.  (Also true for $undefined.)
1097 #   - Thus, the compiler might complain that the user code assumes the wrong
1098 #     type for $$ since the code might assume the type associated with a
1099 #     specific union field, which is especially reasonable in C++ since that
1100 #     type may be a base type.  This test case checks for this problem.  (Also
1101 #     true for $undefined and the error token, so there are three warnings for
1102 #     %printer and three for %destructor.)
1103
1104 AT_BISON_OPTION_PUSHDEFS
1105 AT_DATA_GRAMMAR([[input.y]],
1106 [[%debug /* So that %printer is actually compiled.  */
1107
1108 %{
1109 # include <stdio.h>
1110 # include <stdlib.h>
1111 ]AT_YYERROR_DECLARE[
1112 ]AT_YYLEX_DECLARE[
1113 # define USE(SYM)
1114 %}
1115
1116 %printer {
1117   char chr = $$;
1118   fprintf (yyoutput, "'%c'", chr);
1119 } <> <*>
1120 %destructor {
1121   char chr = $$;
1122   fprintf (stderr, "DESTROY '%c'\n", chr);
1123 } <> <*>
1124
1125 %union { char chr; }
1126 %type <chr> start
1127
1128 %%
1129
1130 start: { USE($$); } ;
1131
1132 %%
1133 ]AT_YYERROR_DEFINE[
1134 ]AT_YYLEX_DEFINE[
1135 int
1136 main (void)
1137 {
1138   return yyparse ();
1139 }
1140 ]])
1141 AT_BISON_OPTION_POPDEFS
1142
1143 AT_BISON_CHECK([-o input.c input.y])
1144 AT_COMPILE([input])
1145
1146 AT_CLEANUP
1147
1148
1149
1150 ## ------------------------------------------------------ ##
1151 ## Default %printer and %destructor for mid-rule values.  ##
1152 ## ------------------------------------------------------ ##
1153
1154 AT_SETUP([Default %printer and %destructor for mid-rule values])
1155
1156 AT_BISON_OPTION_PUSHDEFS
1157 AT_DATA_GRAMMAR([[input.y]],
1158 [[%debug /* So that %printer is actually compiled.  */
1159
1160 %{
1161 # include <stdio.h>
1162 # include <stdlib.h>
1163 ]AT_YYERROR_DECLARE[
1164 ]AT_YYLEX_DECLARE[
1165 # define USE(SYM)
1166 # define YYLTYPE int
1167 # define YYLLOC_DEFAULT(Current, Rhs, N) (void)(Rhs)
1168 # define YY_LOCATION_PRINT(File, Loc)
1169 %}
1170
1171 %printer { fprintf (yyoutput, "%d", @$); } <>
1172 %destructor { fprintf (stderr, "DESTROY %d\n", @$); } <>
1173 %printer { fprintf (yyoutput, "<*> printer should not be called"); } <*>
1174 %destructor { fprintf (yyoutput, "<*> destructor should not be called"); } <*>
1175
1176 %%
1177
1178 start:
1179   {           @$ = 1; } // Not set or used.
1180   { USE ($$); @$ = 2; } // Both set and used.
1181   { USE ($$); @$ = 3; } // Only set.
1182   {           @$ = 4; } // Only used.
1183   'c'
1184   { USE (($$, $2, $4, $5)); @$ = 0; }
1185   ;
1186
1187 %%
1188 ]AT_YYERROR_DEFINE[
1189 ]AT_YYLEX_DEFINE[
1190 int
1191 main (void)
1192 {
1193   yydebug = 1;
1194   return yyparse ();
1195 }
1196 ]])
1197 AT_BISON_OPTION_POPDEFS
1198
1199 AT_BISON_CHECK([-o input.c input.y], 0,,
1200 [[input.y:33.3-23: warning: unset value: $$
1201 input.y:30.3-35.37: warning: unused value: $3
1202 ]])
1203
1204 AT_COMPILE([input])
1205 AT_PARSER_CHECK([./input], 1,,
1206 [[Starting parse
1207 Entering state 0
1208 Reducing stack by rule 1 (line 30):
1209 -> $$ = nterm $@1 (: )
1210 Stack now 0
1211 Entering state 2
1212 Reducing stack by rule 2 (line 31):
1213 -> $$ = nterm @2 (: 2)
1214 Stack now 0 2
1215 Entering state 4
1216 Reducing stack by rule 3 (line 32):
1217 -> $$ = nterm @3 (: 3)
1218 Stack now 0 2 4
1219 Entering state 5
1220 Reducing stack by rule 4 (line 33):
1221 -> $$ = nterm @4 (: 4)
1222 Stack now 0 2 4 5
1223 Entering state 6
1224 Reading a token: Now at end of input.
1225 syntax error
1226 Error: popping nterm @4 (: 4)
1227 DESTROY 4
1228 Stack now 0 2 4 5
1229 Error: popping nterm @3 (: 3)
1230 DESTROY 3
1231 Stack now 0 2 4
1232 Error: popping nterm @2 (: 2)
1233 DESTROY 2
1234 Stack now 0 2
1235 Error: popping nterm $@1 (: )
1236 Stack now 0
1237 Cleanup: discarding lookahead token $end (: )
1238 Stack now 0
1239 ]])
1240
1241 AT_CLEANUP
1242
1243
1244 ## ----------------------- ##
1245 ## @$ implies %locations.  ##
1246 ## ----------------------- ##
1247
1248 # Bison once forgot to check for @$ in actions other than semantic actions.
1249
1250 # AT_CHECK_ACTION_LOCATIONS(ACTION-DIRECTIVE)
1251 # -------------------------------------------
1252 m4_define([AT_CHECK_ACTION_LOCATIONS],
1253 [AT_SETUP([[@$ in ]$1[ implies %locations]])
1254 AT_BISON_OPTION_PUSHDEFS
1255 AT_DATA_GRAMMAR([[input.y]],
1256 [[%code {
1257   #include <stdio.h>
1258 ]AT_YYERROR_DECLARE[
1259 ]AT_YYLEX_DECLARE[
1260 }
1261
1262 %debug
1263
1264 ]$1[ {
1265   fprintf (stderr, "%d\n", @$.first_line);
1266 } ]m4_if($1, [%initial-action], [], [[start]])[
1267
1268 %%
1269
1270 start:  ;
1271
1272 %%
1273
1274 static int
1275 yylex (void)
1276 {
1277   return 0;
1278 }
1279
1280 ]AT_YYERROR_DEFINE[
1281 int
1282 main (void)
1283 {
1284   return yyparse ();
1285 }
1286 ]])
1287
1288 AT_BISON_CHECK([[-o input.c input.y]])
1289 AT_COMPILE([[input]])
1290 AT_BISON_OPTION_POPDEFS
1291 AT_CLEANUP])
1292
1293 AT_CHECK_ACTION_LOCATIONS([[%initial-action]])
1294 AT_CHECK_ACTION_LOCATIONS([[%destructor]])
1295 AT_CHECK_ACTION_LOCATIONS([[%printer]])
1296
1297
1298 ## ------------------------- ##
1299 ## Qualified $$ in actions.  ##
1300 ## ------------------------- ##
1301
1302 # Check that we can used qualified $$ (v.g., $<type>$) not only in
1303 # rule actions, but also where $$ is valid: %printer and %destructor.
1304 #
1305 # FIXME: Not actually checking %destructor, but it's the same code as
1306 # %printer...
1307 #
1308 # To do that, use a semantic value that has two fields (sem_type),
1309 # declare symbols to have only one of these types (INT, float), and
1310 # use $<type>$ to get the other one.  Including for symbols that are
1311 # not typed (UNTYPED).
1312
1313 m4_pushdef([AT_TEST],
1314 [AT_SETUP([[Qualified $$ in actions: $1]])
1315
1316 AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1"])
1317
1318 AT_DATA_GRAMMAR([[input.y]],
1319 [[%skeleton "$1"
1320 %defines   // FIXME: Mandated by lalr1.cc in Bison 2.6.
1321 %locations // FIXME: Mandated by lalr1.cc in Bison 2.6.
1322 %debug
1323 %code requires
1324 {
1325   typedef struct sem_type
1326   {
1327     int ival;
1328     float fval;
1329   } sem_type;
1330
1331 # define YYSTYPE sem_type
1332
1333 ]AT_SKEL_CC_IF([[
1334 # include <iostream>
1335   static void
1336   report (std::ostream& yyo, int ival, float fval)
1337   {
1338     yyo << "ival: " << ival << ", fval: " <<  fval;
1339   }
1340 ]], [[
1341 # include <stdio.h>
1342   static void
1343   report (FILE* yyo, int ival, float fval)
1344   {
1345     fprintf (yyo, "ival: %d, fval: %1.1f", ival, fval);
1346   }
1347 ]])[
1348 }
1349
1350 %code
1351 {
1352   ]AT_YYERROR_DECLARE[
1353   ]AT_YYLEX_DECLARE[
1354 }
1355
1356 %token UNTYPED
1357 %token <ival> INT
1358 %type <fval> float
1359 %printer { report (yyo, $$,       $<fval>$); } <ival>;
1360 %printer { report (yyo, $<ival>$, $$      ); } <fval>;
1361 %printer { report (yyo, $<ival>$, $<fval>$); } <>;
1362
1363 ]AT_SKEL_CC_IF([[
1364 /* The lalr1.cc skeleton, for backward compatibility, defines
1365    a constructor for position that initializes the filename.  The
1366    glr.cc skeleton does not (and in fact cannot: location/position
1367    are stored in a union, from which objects with constructors are
1368    excluded in C++). */
1369 %initial-action {
1370   @$.initialize ();
1371 }
1372 ]])[
1373
1374 %initial-action
1375 {
1376   $<ival>$ = 42;
1377   $<fval>$ = 4.2;
1378 }
1379
1380 %%
1381 float: UNTYPED INT
1382 {
1383   $$       = $<fval>1 + $<fval>2;
1384   $<ival>$ = $<ival>1 + $][2;
1385 };
1386 %%
1387 ]AT_YYERROR_DEFINE[
1388 ]AT_YYLEX_DEFINE(AT_SKEL_CC_IF([[{yy::parser::token::UNTYPED,
1389                                  yy::parser::token::INT,
1390                                   EOF}]],
1391                                [[{UNTYPED, INT, EOF}]]),
1392                  [AT_VAL.ival = toknum * 10; AT_VAL.fval = toknum / 10.0;])[
1393 int
1394 main (void)
1395 {]AT_SKEL_CC_IF([[
1396   yy::parser p;
1397   p.set_debug_level(1);
1398   return p.parse ();]], [[
1399   yydebug = 1;
1400   return yyparse ();]])[
1401 }
1402 ]])
1403
1404 AT_FULL_COMPILE([[input]])
1405 AT_PARSER_CHECK([./input], 0, [], [stderr])
1406 # Don't be too picky on the traces, GLR is not exactly the same.  Keep
1407 # only the lines from the printer.
1408 #
1409 # Don't care about locations.  FIXME: remove their removal when Bison
1410 # supports C++ without locations.
1411 AT_CHECK([[sed -ne 's/([-0-9.]*: /(/;/ival:/p' stderr]], 0,
1412 [[Reading a token: Next token is token UNTYPED (ival: 10, fval: 0.1)
1413 Shifting token UNTYPED (ival: 10, fval: 0.1)
1414 Reading a token: Next token is token INT (ival: 20, fval: 0.2)
1415 Shifting token INT (ival: 20, fval: 0.2)
1416    $][1 = token UNTYPED (ival: 10, fval: 0.1)
1417    $][2 = token INT (ival: 20, fval: 0.2)
1418 -> $$ = nterm float (ival: 30, fval: 0.3)
1419 Cleanup: popping nterm float (ival: 30, fval: 0.3)
1420 ]])
1421
1422 AT_BISON_OPTION_POPDEFS
1423
1424 AT_CLEANUP
1425 ])
1426
1427 AT_TEST([yacc.c])
1428 AT_TEST([glr.c])
1429 AT_TEST([lalr1.cc])
1430 AT_TEST([glr.cc])
1431
1432 m4_popdef([AT_TEST])
1433
1434 ## ----------------------------------------------- ##
1435 ## Fix user actions without a trailing semicolon.  ##
1436 ## ----------------------------------------------- ##
1437
1438 AT_SETUP([[Fix user actions without a trailing semicolon]])
1439
1440 # This feature is undocumented, but we accidentally broke it in 2.3a,
1441 # and there was a complaint at:
1442 # <http://lists.gnu.org/archive/html/bug-bison/2008-11/msg00001.html>.
1443 AT_BISON_OPTION_PUSHDEFS
1444 AT_DATA([input.y],
1445 [[%%
1446 start: test2 test1 test0 testc;
1447
1448 test2
1449 : 'a' { semi;                   /* TEST:N:2 */ }
1450 | 'b' { if (0) {no_semi}        /* TEST:N:2 */ }
1451 | 'c' { if (0) {semi;}          /* TEST:N:2 */ }
1452 | 'd' { semi;   no_semi         /* TEST:Y:2 */ }
1453 | 'e' { semi(); no_semi()       /* TEST:Y:2 */ }
1454 | 'f' { semi[]; no_semi[]       /* TEST:Y:2 */ }
1455 | 'g' { semi++; no_semi++       /* TEST:Y:2 */ }
1456 | 'h' { {no_semi} no_semi       /* TEST:Y:2 */ }
1457 | 'i' { {semi;}   no_semi       /* TEST:Y:2 */ }
1458 ;
1459 test1
1460   : 'a' { semi;                 // TEST:N:1 ;
1461 } | 'b' { if (0) {no_semi}      // TEST:N:1 ;
1462 } | 'c' { if (0) {semi;}        // TEST:N:1 ;
1463 } | 'd' { semi;   no_semi       // TEST:Y:1 ;
1464 } | 'e' { semi(); no_semi()     // TEST:Y:1 ;
1465 } | 'f' { semi[]; no_semi[]     // TEST:Y:1 ;
1466 } | 'g' { semi++; no_semi++     // TEST:Y:1 ;
1467 } | 'h' { {no_semi} no_semi     // TEST:Y:1 ;
1468 } | 'i' { {semi;}   no_semi     // TEST:Y:1 ;
1469 } ;
1470 test0
1471   : 'a' { semi;                 // TEST:N:1 {}
1472 } | 'b' { if (0) {no_semi}      // TEST:N:1 {}
1473 } | 'c' { if (0) {semi;}        // TEST:N:1 {}
1474 } | 'd' { semi;   no_semi       // TEST:Y:1 {}
1475 } | 'e' { semi(); no_semi()     // TEST:Y:1 {}
1476 } | 'f' { semi[]; no_semi[]     // TEST:Y:1 {}
1477 } | 'g' { semi++; no_semi++     // TEST:Y:1 {}
1478 } | 'h' { {no_semi} no_semi     // TEST:Y:1 {}
1479 } | 'i' { {semi;}   no_semi     // TEST:Y:1 {}
1480 } ;
1481
1482 testc
1483 : 'a' {
1484 #define TEST_MACRO_N \
1485 []"broken\" $ @ $$ @$ [];\
1486 string;"}
1487 | 'b' {
1488 no_semi
1489 #define TEST_MACRO_N \
1490 []"broken\" $ @ $$ @$ [];\
1491 string;"}
1492 ]])
1493 AT_BISON_OPTION_POPDEFS
1494
1495 AT_BISON_CHECK([[-o input.c input.y]], [0], [],
1496 [[input.y:8.48: warning: a ';' might be needed at the end of action code
1497 input.y:8.48: warning: future versions of Bison will not add the ';'
1498 input.y:9.48: warning: a ';' might be needed at the end of action code
1499 input.y:9.48: warning: future versions of Bison will not add the ';'
1500 input.y:10.48: warning: a ';' might be needed at the end of action code
1501 input.y:10.48: warning: future versions of Bison will not add the ';'
1502 input.y:11.48: warning: a ';' might be needed at the end of action code
1503 input.y:11.48: warning: future versions of Bison will not add the ';'
1504 input.y:12.48: warning: a ';' might be needed at the end of action code
1505 input.y:12.48: warning: future versions of Bison will not add the ';'
1506 input.y:13.48: warning: a ';' might be needed at the end of action code
1507 input.y:13.48: warning: future versions of Bison will not add the ';'
1508 input.y:20.1: warning: a ';' might be needed at the end of action code
1509 input.y:20.1: warning: future versions of Bison will not add the ';'
1510 input.y:21.1: warning: a ';' might be needed at the end of action code
1511 input.y:21.1: warning: future versions of Bison will not add the ';'
1512 input.y:22.1: warning: a ';' might be needed at the end of action code
1513 input.y:22.1: warning: future versions of Bison will not add the ';'
1514 input.y:23.1: warning: a ';' might be needed at the end of action code
1515 input.y:23.1: warning: future versions of Bison will not add the ';'
1516 input.y:24.1: warning: a ';' might be needed at the end of action code
1517 input.y:24.1: warning: future versions of Bison will not add the ';'
1518 input.y:25.1: warning: a ';' might be needed at the end of action code
1519 input.y:25.1: warning: future versions of Bison will not add the ';'
1520 input.y:31.1: warning: a ';' might be needed at the end of action code
1521 input.y:31.1: warning: future versions of Bison will not add the ';'
1522 input.y:32.1: warning: a ';' might be needed at the end of action code
1523 input.y:32.1: warning: future versions of Bison will not add the ';'
1524 input.y:33.1: warning: a ';' might be needed at the end of action code
1525 input.y:33.1: warning: future versions of Bison will not add the ';'
1526 input.y:34.1: warning: a ';' might be needed at the end of action code
1527 input.y:34.1: warning: future versions of Bison will not add the ';'
1528 input.y:35.1: warning: a ';' might be needed at the end of action code
1529 input.y:35.1: warning: future versions of Bison will not add the ';'
1530 input.y:36.1: warning: a ';' might be needed at the end of action code
1531 input.y:36.1: warning: future versions of Bison will not add the ';'
1532 ]])
1533
1534 AT_MATCHES_CHECK([input.c], [[/\* TEST:N:2 \*/ \}$]],       [[3]])
1535 AT_MATCHES_CHECK([input.c], [[/\* TEST:Y:2 \*/ ;\}$]],      [[6]])
1536 AT_MATCHES_CHECK([input.c], [[// TEST:N:1 [;{}]*\n\}$]],    [[6]])
1537 AT_MATCHES_CHECK([input.c], [[// TEST:Y:1 [;{}]*\n;\}$]],  [[12]])
1538 AT_MATCHES_CHECK([input.c], [[#define TEST_MACRO_N \\\n\[\]"broken\\" \$ \@ \$\$ \@\$ \[\];\\\nstring;"\}]], [[2]])
1539
1540 AT_CLEANUP
1541
1542
1543 ## -------------------------------------------------- ##
1544 ## Destroying lookahead assigned by semantic action.  ##
1545 ## -------------------------------------------------- ##
1546
1547 AT_SETUP([[Destroying lookahead assigned by semantic action]])
1548
1549 AT_BISON_OPTION_PUSHDEFS
1550 AT_DATA_GRAMMAR([input.y],
1551 [[
1552 %code {
1553   #include <assert.h>
1554   #include <stdio.h>
1555 ]AT_YYERROR_DECLARE[
1556 ]AT_YYLEX_DECLARE[
1557   #define USE(Var)
1558 }
1559
1560 %destructor { fprintf (stderr, "'a' destructor\n"); } 'a'
1561 %destructor { fprintf (stderr, "'b' destructor\n"); } 'b'
1562
1563 %%
1564
1565 // In a previous version of Bison, yychar assigned by the semantic
1566 // action below was not translated into yytoken before the lookahead was
1567 // discarded and thus before its destructor (selected according to
1568 // yytoken) was called in order to return from yyparse.  This would
1569 // happen even if YYACCEPT was performed in a later semantic action as
1570 // long as only consistent states with default reductions were visited
1571 // in between.  However, we leave YYACCEPT in the same semantic action
1572 // for this test in order to show that skeletons cannot simply translate
1573 // immediately after every semantic action because a semantic action
1574 // that has set yychar might not always return normally.  Instead,
1575 // skeletons must translate before every use of yytoken.
1576 start: 'a' accept { USE($1); } ;
1577 accept: /*empty*/ {
1578   assert (yychar == YYEMPTY);
1579   yychar = 'b';
1580   YYACCEPT;
1581 } ;
1582
1583 %%
1584 ]AT_YYERROR_DEFINE[
1585 ]AT_YYLEX_DEFINE(["a"])[
1586 int
1587 main (void)
1588 {
1589   return yyparse ();
1590 }
1591 ]])
1592 AT_BISON_OPTION_POPDEFS
1593 AT_BISON_CHECK([[-o input.c input.y]])
1594 AT_COMPILE([[input]])
1595 AT_PARSER_CHECK([[./input]], [[0]], [],
1596 [['b' destructor
1597 'a' destructor
1598 ]])
1599
1600 AT_CLEANUP
1601
1602 ## ---------- ##
1603 ## YYBACKUP.  ##
1604 ## ---------- ##
1605
1606 AT_SETUP([[YYBACKUP]])
1607
1608 AT_BISON_OPTION_PUSHDEFS([%pure-parser])
1609
1610 AT_DATA_GRAMMAR([input.y],
1611 [[
1612 %error-verbose
1613 %debug
1614 %pure-parser
1615 %code {
1616 # include <stdio.h>
1617 # include <stdlib.h>
1618 # include <assert.h>
1619
1620   ]AT_YYERROR_DECLARE[
1621   ]AT_YYLEX_DECLARE[
1622 }
1623 %%
1624 input:
1625   exp exp {}
1626 ;
1627
1628 exp:
1629   'a'     { printf ("a: %d\n", $1); }
1630 | 'b'     { YYBACKUP('a', 123); }
1631 | 'c' 'd' { YYBACKUP('a', 456); }
1632 ;
1633
1634 %%
1635 ]AT_YYERROR_DEFINE[
1636 ]AT_YYLEX_DEFINE(["bcd"], [*lvalp = (toknum + 1) * 10])[
1637
1638 int
1639 main (void)
1640 {
1641   yydebug = !!getenv("YYDEBUG");
1642   return yyparse ();
1643 }
1644 ]])
1645 AT_BISON_OPTION_POPDEFS
1646
1647 AT_BISON_CHECK([[-o input.c input.y]])
1648 AT_COMPILE([[input]])
1649 AT_PARSER_CHECK([[./input]], [[0]],
1650 [[a: 123
1651 a: 456
1652 ]])
1653
1654 AT_CLEANUP