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