tests/named-refs.at

   1 # Named references test.                           -*- Autotest -*-
   2
   3 # Copyright (C) 2009-2012 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([[Named references tests.]])
  19
  20 AT_SETUP([Tutorial calculator])
  21
  22 AT_DATA_GRAMMAR([test.y],
  23 [[
  24 %{
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <ctype.h>
  29 typedef int semantic_value;
  30 FILE *input;
  31 static semantic_value global_result = 0;
  32 static int global_count = 0;
  33 static int power (int base, int exponent);
  34 static void yyerror (const char *s);
  35 int yylex (void);
  36 %}
  37
  38 %union
  39 {
  40   semantic_value ival;
  41 };
  42
  43 %token CALC_EOF 0 "end of input"
  44 %token <ival> NUM "number"
  45 %type  <ival> exp
  46
  47 %nonassoc '='   /* comparison          */
  48 %left '-' '+'
  49 %left '*' '/'
  50 %precedence NEG /* negation--unary minus */
  51 %right '^'      /* exponentiation        */
  52
  53 %%
  54 input:
  55   line
  56 | input line         {  }
  57 ;
  58
  59 line:
  60   '\n'
  61 | exp '\n'           {  }
  62 ;
  63
  64 exp:
  65   NUM                { $$ = $NUM; }
  66 | exp[l] '=' exp[r]
  67   {
  68     if ($l != $r)
  69       fprintf (stderr, "calc: error: %d != %d\n", $l, $r);
  70    $$ = $l;
  71   }
  72 | exp[x] '+' { $<ival>$ = $x; } [l] exp[r]  { $$ = $<ival>l + $r;    }
  73 | exp[l] '-' exp[r]        { $$ = $l - $r;        }
  74 | exp[l] '*' exp[r]        { $$ = $l * $r;        }
  75 | exp[l] '/' exp[r]  { $$ = $l / $r;        }
  76 | '-' exp  %prec NEG { $$ = -$2;            }
  77 | exp[l] '^' exp[r]        { $$ = power ($l, $r); }
  78 | '(' exp[e] ')'        { $$ = $e;           }
  79 | '(' error ')'      { $$ = 1111; yyerrok;  }
  80 | '!'                { $$ = 0; YYERROR;     }
  81 | '-' error          { $$ = 0; YYERROR;     }
  82 ;
  83 %%
  84
  85 static void yyerror (const char *s)
  86 {
  87   fprintf (stderr, "%s\n", s);
  88 }
  89
  90 static int get_char (void)
  91 {
  92   int res = getc (input);
  93   return res;
  94 }
  95
  96 static void unget_char (int c)
  97 {
  98   ungetc (c, input);
  99 }
 100
 101 static int read_signed_integer (void)
 102 {
 103   int c = get_char ();
 104   int sign = 1;
 105   int n = 0;
 106   if (c == '-')
 107     {
 108       c = get_char ();
 109       sign = -1;
 110     }
 111   while (isdigit (c))
 112     {
 113       n = 10 * n + (c - '0');
 114       c = get_char ();
 115     }
 116   unget_char ( c);
 117   return sign * n;
 118 }
 119
 120 int yylex (void)
 121 {
 122   int c;
 123   /* Skip white space.  */
 124   while ((c = get_char ()) == ' ' || c == '\t') {}
 125
 126   /* process numbers   */
 127   if (c == '.' || isdigit (c))
 128     {
 129       unget_char ( c);
 130       (yylval).ival = read_signed_integer ();
 131       return NUM;
 132     }
 133
 134   /* Return end-of-file.  */
 135   if (c == EOF)
 136     return CALC_EOF;
 137
 138   /* Return single chars. */
 139   return c;
 140 }
 141
 142 static int power (int base, int exponent)
 143 {
 144   int res = 1;
 145   if (exponent < 0)
 146     exit (3);
 147   for (/* Niente */; exponent; --exponent)
 148     res *= base;
 149   return res;
 150 }
 151
 152 int main (int argc, const char **argv)
 153 {
 154   semantic_value result = 0;
 155   int count = 0;
 156   int status;
 157   if (argc == 2)
 158     input = fopen (argv[1], "r");
 159   else
 160     input = stdin;
 161   if (!input)
 162     {
 163       perror (argv[1]);
 164       return 3;
 165     }
 166   status = yyparse ();
 167   fclose (input);
 168   if (global_result != result)
 169     abort ();
 170   if (global_count != count)
 171     abort ();
 172   return status;
 173 }
 174 ]])
 175
 176 AT_DATA([input.txt],
 177 [[
 178 1 + 2 * 3 = 7
 179 1 + 2 * -3 = -5
 180 -1^2 = -1
 181 (-1)^2 = 1
 182 ---1 = -1
 183 1 - 2 - 3 = -4
 184 1 - (2 - 3) = 2
 185 2^2^3 = 256
 186 (2^2)^3 = 64
 187 ]])
 188
 189 AT_BISON_CHECK([-o test.c test.y])
 190 AT_COMPILE([[test]])
 191 AT_PARSER_CHECK([./test input.txt], 0, [], [stderr])
 192 AT_CLEANUP
 193
 194
 195
 196 #######################################################################
 197
 198
 199 AT_SETUP([Undefined and ambiguous references])
 200
 201 AT_DATA_GRAMMAR([test.y],
 202 [[
 203 %{
 204 static int power (int base, int exponent);
 205 static void yyerror (const char *s);
 206 int yylex (void);
 207 %}
 208
 209 %union
 210 {
 211   int ival;
 212 };
 213
 214 %token CALC_EOF 0 "end of input"
 215 %token <ival> NUM "number"
 216 %type  <ival> exp
 217
 218 %nonassoc '='   /* comparison          */
 219 %left '-' '+'
 220 %left '*' '/'
 221 %precedence NEG /* negation--unary minus */
 222 %right '^'      /* exponentiation        */
 223
 224 %%
 225 input:
 226   line
 227 | input line         {  }
 228 ;
 229
 230 line:
 231   '\n'
 232 | exp '\n'           {  }
 233 ;
 234
 235 exp:
 236   NUM { $$ = $NUM; }
 237 | exp[l] '=' exp[r]
 238   {
 239     if ($l != $r)
 240       fprintf (stderr, "calc: error: %d != %d\n", $l, $r);
 241    $$ = $l;
 242   }
 243 | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
 244 | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 245 | exp[x] '*' { $<ival>$ = $x; } [l] exp[r] { $$ = $l * $r; }
 246 | exp[l] '/' exp[r]  { $$ = $l / $r;        }
 247 | '-' exp  %prec NEG { $$ = -$2;            }
 248 | exp[l] '^' exp[r]        { $$ = power ($l, $r12); }
 249 | '(' exp ')'        { $$ = $expo;           }
 250 | '(' error ')'      { $$ = 1111; yyerrok;  }
 251 | '!'                { $$ = 0; YYERROR;     }
 252 | '-' error          { $$ = 0; YYERROR;     }
 253 ;
 254 %%
 255 ]])
 256
 257 AT_BISON_CHECK([-o test.c test.y], 1, [],
 258 [[test.y:50.51-60: invalid reference: '$<ival>lo9'
 259 test.y:50.3-68:      symbol not found in production: lo9
 260 test.y:51.51-60: warning: misleading reference: '$<ival>exp'
 261 test.y:42.1-3:       warning: refers to: $exp at $$
 262 test.y:51.7:         warning: possibly meant: $x, hiding $exp at $1
 263 test.y:51.41:        warning: possibly meant: $r, hiding $exp at $4
 264 test.y:52.51-52: $l of 'exp' has no declared type
 265 test.y:55.46-49: invalid reference: '$r12'
 266 test.y:55.3-53:      symbol not found in production: r12
 267 test.y:56.29-33: invalid reference: '$expo'
 268 test.y:56.3-46:      symbol not found in production: expo
 269 ]])
 270 AT_CLEANUP
 271
 272 #######################################################################
 273
 274 AT_SETUP([Misleading references])
 275 AT_DATA_GRAMMAR([test.y],
 276 [[
 277 %%
 278 start: foo foo.bar { $foo.bar; }
 279 foo: '1'
 280 foo.bar: '2'
 281 ]])
 282 AT_BISON_CHECK([-o test.c test.y], 0, [],
 283 [[test.y:11.22-29: warning: misleading reference: '$foo.bar'
 284 test.y:11.8-10:      warning: refers to: $foo at $1
 285 test.y:11.12-18:     warning: possibly meant: $[foo.bar] at $2
 286 ]])
 287 AT_CLEANUP
 288
 289 #######################################################################
 290
 291 AT_SETUP([Many kinds of errors])
 292 AT_DATA_GRAMMAR([test.y],
 293 [[
 294 %token IDENT
 295 %token NUMBER
 296 %token ASSIGNOP
 297 %token IF
 298 %token IF1
 299 %token THEN
 300 %token ELSE
 301 %token FI
 302 %token WHILE
 303 %token DO
 304 %token OD
 305 %start program
 306 %%
 307 if_stmt1: IF expr[cond] THEN stmt[then] ELSE stmt.list[else] FI
 308           { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
 309 if_stmt2: IF expr[cond] THEN stmt[then] FI
 310           { $if_stmt2 = new IfStmt($cond, $stmt.field, 0); };
 311 if_stmt3: IF expr[cond] THEN stmt.list FI
 312           { $if_stmt3 = new IfStmt($cond, $stmt.list, 0); };
 313 if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 314           { $if_stmt4 = new IfStmt($cond, $xyz, $cond); };
 315 if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 316           { $if_stmt5 = new IfStmt($cond, $stmt.list, $else); };
 317 if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 318           { $if_stmt6 = new IfStmt($cond, $stmt.list.field, $else); };
 319 if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 320           { $if_stmt7 = new IfStmt($cond, $[stmt.list].field, $else); };
 321 if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 322           { $if_stmt8 = new IfStmt($cond, $then.1, $else); };
 323 if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 324           { $if_stmt9 = new IfStmt($cond, $then.1.field, $else); };
 325 if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 326           { $if_stmt10 = new IfStmt($cond, $stmt.x, 0); };
 327 if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 328           { $if-stmt-a = new IfStmt($cond, $then, $else); };
 329 if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 330           { $[if-stmt-b] = new IfStmt($cond, $then-a.f, $else); };
 331 program: stmt.list;
 332 stmt.list:  stmt ';' stmt.list { $3->insert($stmt); $$ = $3; }
 333         |   stmt ';' { SL = new StmtList();  SL->insert($1); $$ = SL; }
 334         ;
 335 stmt:  assign_stmt { $$ = $1; }
 336     |  if_stmt { $$ = $1; }
 337     |  if_stmt1 { $$ = $1; }
 338     |  while_stmt { $$ = $1; }
 339     ;
 340 assign_stmt: IDENT ASSIGNOP expr
 341        { $$ = new AssignStmt(string($1),$3); };
 342 if_stmt: IF expr[cond] THEN stmt.list FI
 343        { $if_stmt = new IfStmt($cond, $[stmt.list], 0); };
 344 while_stmt[res]: WHILE expr DO stmt.list OD
 345        { $res = new WhileStmt($[expr], $[stmt.list]); };
 346 expr: expr '+' term   { $$ = new Plus($1,$3); }
 347     | expr '-' term   { $$ = new Minus($1,$3); }
 348     | term            { $$ = $1; }
 349     ;
 350 term: term '*' factor   { $$ = new Times($1,$3); }
 351     | factor            { $$ = $1; }
 352     ;
 353 factor:     '(' expr ')'  { $$ = $2; }
 354     |       NUMBER { $$ = new Number($1); }
 355     |       IDENT { $$ = new Ident(string($1)); }
 356     ;
 357 ]])
 358 AT_BISON_CHECK([-o test.c test.y], 1, [],
 359 [[test.y:24.36-41: invalid reference: '$cond1'
 360 test.y:23.11-24.62:  symbol not found in production: cond1
 361 test.y:26.43-53: invalid reference: '$stmt.field'
 362 test.y:25.11-26.60:  symbol not found in production: stmt
 363 test.y:25.35-38:     possibly meant: $then.field, hiding $stmt.field at $4
 364 test.y:28.43-52: invalid reference: '$stmt.list'
 365 test.y:27.11-28.59:  symbol not found in production: stmt
 366 test.y:27.30-38:     possibly meant: $[stmt.list] at $4
 367 test.y:30.43-46: ambiguous reference: '$xyz'
 368 test.y:29.35-37:     refers to: $xyz at $4
 369 test.y:29.50-52:     refers to: $xyz at $6
 370 test.y:32.43-52: invalid reference: '$stmt.list'
 371 test.y:31.11-32.63:  symbol not found in production: stmt
 372 test.y:31.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 373 test.y:31.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 374 test.y:34.43-58: invalid reference: '$stmt.list.field'
 375 test.y:33.11-34.69:  symbol not found in production: stmt
 376 test.y:33.40-43:     possibly meant: $then.field, hiding $[stmt.list].field at $4
 377 test.y:33.61-64:     possibly meant: $else.field, hiding $[stmt.list].field at $6
 378 test.y:36.43-54: invalid reference: '$[stmt.list]'
 379 test.y:35.11-36.71:  symbol not found in production: stmt.list
 380 test.y:35.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 381 test.y:35.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 382 test.y:38.43-49: invalid reference: '$then.1'
 383 test.y:37.11-38.60:  symbol not found in production: then
 384 test.y:37.40-45:     possibly meant: $[then.1] at $4
 385 test.y:40.43-55: invalid reference: '$then.1.field'
 386 test.y:39.11-40.66:  symbol not found in production: then
 387 test.y:39.40-45:     possibly meant: $[then.1].field at $4
 388 test.y:42.44-50: invalid reference: '$stmt.x'
 389 test.y:41.12-42.57:  symbol not found in production: stmt
 390 test.y:41.36-41:     possibly meant: $[stmt.x].x, hiding $stmt.x at $4
 391 test.y:41.36-41:     possibly meant: $[stmt.x] at $4
 392 test.y:44.13-22: invalid reference: '$if-stmt-a'
 393 test.y:43.12-44.59:  symbol not found in production: if
 394 test.y:43.1-9:       possibly meant: $[if-stmt-a] at $$
 395 test.y:46.46-54: invalid reference: '$then-a.f'
 396 test.y:45.12-46.65:  symbol not found in production: then
 397 test.y:45.41-46:     possibly meant: $[then-a].f at $4
 398 ]])
 399 AT_CLEANUP
 400
 401 #######################################################################
 402
 403 AT_SETUP([Missing identifiers in brackets])
 404 AT_DATA_GRAMMAR([test.y],
 405 [[
 406 %%
 407 start: foo[] bar
 408   { s = $foo; }
 409 ]])
 410 AT_BISON_CHECK([-o test.c test.y], 1, [],
 411 [[test.y:11.12: an identifier expected
 412 ]])
 413 AT_CLEANUP
 414
 415 #######################################################################
 416
 417 AT_SETUP([Redundant words in brackets])
 418 AT_DATA_GRAMMAR([test.y],
 419 [[
 420 %%
 421 start: foo[ a d ] bar
 422   { s = $foo; }
 423 ]])
 424 AT_BISON_CHECK([-o test.c test.y], 1, [],
 425 [[test.y:11.15: unexpected identifier in bracketed name: 'd'
 426 ]])
 427 AT_CLEANUP
 428
 429 #######################################################################
 430
 431 AT_SETUP([Comments in brackets])
 432 AT_DATA_GRAMMAR([test.y],
 433 [[
 434 %%
 435 start: foo[/* comment */] bar
 436   { s = $foo; }
 437 ]])
 438 AT_BISON_CHECK([-o test.c test.y], 1, [],
 439 [[test.y:11.25: an identifier expected
 440 ]])
 441 AT_CLEANUP
 442
 443 #######################################################################
 444
 445 AT_SETUP([Stray symbols in brackets])
 446 AT_DATA_GRAMMAR([test.y],
 447 [[
 448 %%
 449 start: foo[ /* aaa */ *&-.+ ] bar
 450   { s = $foo; }
 451 ]])
 452 AT_BISON_CHECK([-o test.c test.y], 1, [],
 453 [[test.y:11.23: invalid character in bracketed name: '*'
 454 test.y:11.24: invalid character in bracketed name: '&'
 455 test.y:11.25: invalid character in bracketed name: '-'
 456 test.y:11.27: invalid character in bracketed name: '+'
 457 ]])
 458 AT_CLEANUP
 459
 460 #######################################################################
 461
 462 AT_SETUP([Redundant words in LHS brackets])
 463 AT_DATA_GRAMMAR([test.y],
 464 [[
 465 %%
 466 start[a s]: foo;
 467 ]])
 468 AT_BISON_CHECK([-o test.c test.y], 1, [],
 469 [[test.y:11.9: unexpected identifier in bracketed name: 's'
 470 ]])
 471 AT_CLEANUP
 472
 473 #######################################################################
 474
 475 # Bison used to free twice the named ref for "a", since a single copy
 476 # was used in two rules.
 477 AT_SETUP([Factored LHS])
 478 AT_DATA_GRAMMAR([test.y],
 479 [[
 480 %%
 481 start[a]: "foo" | "bar";
 482 ]])
 483 AT_BISON_CHECK([-o test.c test.y])
 484 AT_CLEANUP
 485
 486 #######################################################################
 487
 488 AT_SETUP([Unresolved references])
 489 AT_DATA_GRAMMAR([test.y],
 490 [[
 491 %%
 492 stat:
 493   sym_a sym_b { func($sym.field); }
 494 | sym_a sym_b { func($<aa>sym.field); }
 495 | sym_a sym_b { func($[sym.field]); }
 496 | sym_a sym_b { func($<aa>[sym.field]); }
 497 | sym_a sym_b { func($sym); }
 498 | sym_a sym_b { func($<aa>sym); }
 499 | sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
 500 ;
 501
 502 stat1:
 503   sym_a sym_b { func($sym-field); }
 504 | sym_a sym_b { func($<aa>sym-field); }
 505 | sym_a sym_b { func($[sym-field]); }
 506 | sym_a sym_b { func($<aa>[sym-field]); }
 507 | sym_a sym_b { func($sym); }
 508 | sym_a sym_b { func($<aa>sym); }
 509 | sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
 510 ;
 511
 512 sym_a: 'a';
 513 sym_b: 'b';
 514 ]])
 515 AT_BISON_CHECK([-o test.c test.y], 1, [],
 516 [[test.y:12.22-31: invalid reference: '$sym.field'
 517 test.y:12.3-35:      symbol not found in production: sym
 518 test.y:13.22-35: invalid reference: '$<aa>sym.field'
 519 test.y:13.3-39:      symbol not found in production: sym
 520 test.y:14.22-33: invalid reference: '$[sym.field]'
 521 test.y:14.3-37:      symbol not found in production: sym.field
 522 test.y:15.22-37: invalid reference: '$<aa>[sym.field]'
 523 test.y:15.3-41:      symbol not found in production: sym.field
 524 test.y:16.22-25: invalid reference: '$sym'
 525 test.y:16.3-29:      symbol not found in production: sym
 526 test.y:17.22-29: invalid reference: '$<aa>sym'
 527 test.y:17.3-33:      symbol not found in production: sym
 528 test.y:18.22-27: invalid reference: '$[sym]'
 529 test.y:18.3-65:      symbol not found in production before $3: sym
 530 test.y:18.52-61: invalid reference: '$<aa>[sym]'
 531 test.y:18.3-65:      symbol not found in production: sym
 532 test.y:22.22-31: invalid reference: '$sym-field'
 533 test.y:22.3-35:      symbol not found in production: sym
 534 test.y:23.22-35: invalid reference: '$<aa>sym-field'
 535 test.y:23.3-39:      symbol not found in production: sym
 536 test.y:24.22-33: invalid reference: '$[sym-field]'
 537 test.y:24.3-37:      symbol not found in production: sym-field
 538 test.y:25.22-37: invalid reference: '$<aa>[sym-field]'
 539 test.y:25.3-41:      symbol not found in production: sym-field
 540 test.y:26.22-25: invalid reference: '$sym'
 541 test.y:26.3-29:      symbol not found in production: sym
 542 test.y:27.22-29: invalid reference: '$<aa>sym'
 543 test.y:27.3-33:      symbol not found in production: sym
 544 test.y:28.22-27: invalid reference: '$[sym]'
 545 test.y:28.3-65:      symbol not found in production before $3: sym
 546 test.y:28.52-61: invalid reference: '$<aa>[sym]'
 547 test.y:28.3-65:      symbol not found in production: sym
 548 ]])
 549 AT_CLEANUP
 550
 551 #######################################################################
 552
 553 AT_SETUP([[$ or @ followed by . or -]])
 554 AT_DATA([[test.y]],
 555 [[
 556 %%
 557 start:
 558   .field { $.field; }
 559 | 'a'    { @.field; }
 560 ;
 561 .field: ;
 562 ]])
 563 AT_BISON_CHECK([[test.y]], [[1]], [],
 564 [[test.y:4.12-18: invalid reference: '$.field'
 565 test.y:4.13:        syntax error after '$', expecting integer, letter, '_', '@<:@', or '$'
 566 test.y:4.3-8:       possibly meant: $[.field] at $1
 567 test.y:5.12-18: invalid reference: '@.field'
 568 test.y:5.13:        syntax error after '@', expecting integer, letter, '_', '@<:@', or '$'
 569 ]])
 570 AT_DATA([[test.y]],
 571 [[
 572 %%
 573 start:
 574   'a' { $-field; }
 575 | 'b' { @-field; }
 576 ;
 577 ]])
 578 AT_BISON_CHECK([[test.y]], [[0]], [],
 579 [[test.y:4.9: warning: stray '$'
 580 test.y:5.9: warning: stray '@'
 581 ]])
 582 AT_CLEANUP