tests/named-refs.at

   1 # Named references test.                           -*- Autotest -*-
   2
   3 # Copyright (C) 2009-2013 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 AT_BISON_OPTION_PUSHDEFS
  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 ]AT_YYERROR_DECLARE[
  37 ]AT_YYLEX_DECLARE[
  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 %precedence 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 ]AT_YYERROR_DEFINE[
  87 static int get_char (void)
  88 {
  89   int res = getc (input);
  90   return res;
  91 }
  92
  93 static void unget_char (int c)
  94 {
  95   ungetc (c, input);
  96 }
  97
  98 static int read_signed_integer (void)
  99 {
 100   int c = get_char ();
 101   int sign = 1;
 102   int n = 0;
 103   if (c == '-')
 104     {
 105       c = get_char ();
 106       sign = -1;
 107     }
 108   while (isdigit (c))
 109     {
 110       n = 10 * n + (c - '0');
 111       c = get_char ();
 112     }
 113   unget_char ( c);
 114   return sign * n;
 115 }
 116
 117 static int
 118 yylex (void)
 119 {
 120   int c;
 121   /* Skip white space.  */
 122   while ((c = get_char ()) == ' ' || c == '\t') {}
 123
 124   /* process numbers   */
 125   if (c == '.' || isdigit (c))
 126     {
 127       unget_char ( c);
 128       (yylval).ival = read_signed_integer ();
 129       return NUM;
 130     }
 131
 132   /* Return end-of-file.  */
 133   if (c == EOF)
 134     return CALC_EOF;
 135
 136   /* Return single chars. */
 137   return c;
 138 }
 139
 140 static int power (int base, int exponent)
 141 {
 142   int res = 1;
 143   assert (0 <= exponent);
 144   for (/* Niente */; exponent; --exponent)
 145     res *= base;
 146   return res;
 147 }
 148
 149 int main (int argc, const char **argv)
 150 {
 151   semantic_value result = 0;
 152   int count = 0;
 153   int status;
 154   if (argc == 2)
 155     input = fopen (argv[1], "r");
 156   else
 157     input = stdin;
 158   if (!input)
 159     {
 160       perror (argv[1]);
 161       return 3;
 162     }
 163   status = yyparse ();
 164   fclose (input);
 165   assert (global_result == result);
 166   assert (global_count == count);
 167   return status;
 168 }
 169 ]])
 170
 171 AT_DATA([input.txt],
 172 [[
 173 1 + 2 * 3 = 7
 174 1 + 2 * -3 = -5
 175 -1^2 = -1
 176 (-1)^2 = 1
 177 ---1 = -1
 178 1 - 2 - 3 = -4
 179 1 - (2 - 3) = 2
 180 2^2^3 = 256
 181 (2^2)^3 = 64
 182 ]])
 183
 184 AT_FULL_COMPILE([[test]])
 185 AT_PARSER_CHECK([./test input.txt], 0, [], [stderr])
 186 AT_BISON_OPTION_POPDEFS
 187 AT_CLEANUP
 188
 189
 190
 191 #######################################################################
 192
 193
 194 AT_SETUP([Undefined and ambiguous references])
 195 AT_BISON_OPTION_PUSHDEFS
 196 AT_DATA_GRAMMAR([test.y],
 197 [[
 198 %{
 199 static int power (int base, int exponent);
 200 ]AT_YYERROR_DECLARE[
 201 ]AT_YYLEX_DECLARE[
 202 %}
 203
 204 %union
 205 {
 206   int ival;
 207 };
 208
 209 %token CALC_EOF 0 "end of input"
 210 %token <ival> NUM "number"
 211 %type  <ival> exp
 212
 213 %nonassoc '='   /* comparison          */
 214 %left '-' '+'
 215 %left '*' '/'
 216 %precedence NEG /* negation--unary minus */
 217 %right '^'      /* exponentiation        */
 218
 219 %%
 220 input:
 221   line
 222 | input line         {}
 223 ;
 224
 225 line:
 226   '\n'
 227 | exp '\n'           {}
 228 ;
 229
 230 exp:
 231   NUM { $$ = $NUM; }
 232 | exp[l] '=' exp[r]
 233   {
 234     if ($l != $r)
 235       fprintf (stderr, "calc: error: %d != %d\n", $l, $r);
 236    $$ = $l;
 237   }
 238 | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
 239 | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 240 | exp[x] '*' { $<ival>$ = $x; } [l] exp[r] { $$ = $l * $r; }
 241 | exp[l] '/' exp[r]  { $$ = $l / $r;        }
 242 | '-' exp  %prec NEG { $$ = -$2;            }
 243 | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
 244 | '(' exp ')'        { $$ = $expo;           }
 245 | '(' error ')'      { $$ = 1111; yyerrok;  }
 246 | '!'                { $$ = 0; YYERROR;     }
 247 | '-' error          { $$ = 0; YYERROR;     }
 248 ;
 249 %%
 250 ]])
 251
 252 AT_BISON_CHECK([-fcaret -o test.c test.y], 1, [],
 253 [[test.y:50.51-60: error: invalid reference: '$<ival>lo9'
 254  | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
 255                                                    ^^^^^^^^^^
 256 test.y:50.3-68:      symbol not found in production: lo9
 257  | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
 258    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 259 test.y:51.51-60: warning: misleading reference: '$<ival>exp' [-Wother]
 260  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 261                                                    ^^^^^^^^^^
 262 test.y:42.1-3:       refers to: $exp at $$
 263  exp:
 264  ^^^
 265 test.y:51.7:         possibly meant: $x, hiding $exp at $1
 266  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 267        ^
 268 test.y:51.41:        possibly meant: $r, hiding $exp at $4
 269  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 270                                          ^
 271 test.y:52.51-52: error: $l of 'exp' has no declared type
 272  | exp[x] '*' { $<ival>$ = $x; } [l] exp[r] { $$ = $l * $r; }
 273                                                    ^^
 274 test.y:55.40-43: error: invalid reference: '$r12'
 275  | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
 276                                         ^^^^
 277 test.y:55.3-47:      symbol not found in production: r12
 278  | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
 279    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 280 test.y:56.29-33: error: invalid reference: '$expo'
 281  | '(' exp ')'        { $$ = $expo;           }
 282                              ^^^^^
 283 test.y:56.3-46:      symbol not found in production: expo
 284  | '(' exp ')'        { $$ = $expo;           }
 285    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 286 ]])
 287 AT_BISON_OPTION_POPDEFS
 288 AT_CLEANUP
 289
 290 #######################################################################
 291
 292 AT_SETUP([Misleading references])
 293 AT_DATA_GRAMMAR([test.y],
 294 [[
 295 %%
 296 start: foo foo.bar { $foo.bar; }
 297 foo: '1'
 298 foo.bar: '2'
 299 ]])
 300 AT_BISON_CHECK([-o test.c test.y], 0, [],
 301 [[test.y:11.22-29: warning: misleading reference: '$foo.bar' [-Wother]
 302 test.y:11.8-10:      refers to: $foo at $1
 303 test.y:11.12-18:     possibly meant: $[foo.bar] at $2
 304 ]])
 305 AT_CLEANUP
 306
 307 #######################################################################
 308
 309 AT_SETUP([Many kinds of errors])
 310 AT_DATA_GRAMMAR([test.y],
 311 [[
 312 %token IDENT
 313 %token NUMBER
 314 %token ASSIGNOP
 315 %token IF
 316 %token IF1
 317 %token THEN
 318 %token ELSE
 319 %token FI
 320 %token WHILE
 321 %token DO
 322 %token OD
 323 %start program
 324 %%
 325 if_stmt1: IF expr[cond] THEN stmt[then] ELSE stmt.list[else] FI
 326           { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
 327 if_stmt2: IF expr[cond] THEN stmt[then] FI
 328           { $if_stmt2 = new IfStmt($cond, $stmt.field, 0); };
 329 if_stmt3: IF expr[cond] THEN stmt.list FI
 330           { $if_stmt3 = new IfStmt($cond, $stmt.list, 0); };
 331 if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 332           { $if_stmt4 = new IfStmt($cond, $xyz, $cond); };
 333 if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 334           { $if_stmt5 = new IfStmt($cond, $stmt.list, $else); };
 335 if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 336           { $if_stmt6 = new IfStmt($cond, $stmt.list.field, $else); };
 337 if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 338           { $if_stmt7 = new IfStmt($cond, $[stmt.list].field, $else); };
 339 if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 340           { $if_stmt8 = new IfStmt($cond, $then.1, $else); };
 341 if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 342           { $if_stmt9 = new IfStmt($cond, $then.1.field, $else); };
 343 if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 344           { $if_stmt10 = new IfStmt($cond, $stmt.x, 0); };
 345 if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 346           { $if-stmt-a = new IfStmt($cond, $then, $else); };
 347 if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 348           { $[if-stmt-b] = new IfStmt($cond, $then-a.f, $else); };
 349 program: stmt.list;
 350 stmt.list:  stmt ';' stmt.list { $3->insert($stmt); $$ = $3; }
 351         |   stmt ';' { SL = new StmtList();  SL->insert($1); $$ = SL; }
 352         ;
 353 stmt:  assign_stmt { $$ = $1; }
 354     |  if_stmt { $$ = $1; }
 355     |  if_stmt1 { $$ = $1; }
 356     |  while_stmt { $$ = $1; }
 357     ;
 358 assign_stmt: IDENT ASSIGNOP expr
 359        { $$ = new AssignStmt(string($1),$3); };
 360 if_stmt: IF expr[cond] THEN stmt.list FI
 361        { $if_stmt = new IfStmt($cond, $[stmt.list], 0); };
 362 while_stmt[res]: WHILE expr DO stmt.list OD
 363        { $res = new WhileStmt($[expr], $[stmt.list]); };
 364 expr: expr '+' term   { $$ = new Plus($1,$3); }
 365     | expr '-' term   { $$ = new Minus($1,$3); }
 366     | term            { $$ = $1; }
 367     ;
 368 term: term '*' factor   { $$ = new Times($1,$3); }
 369     | factor            { $$ = $1; }
 370     ;
 371 factor:     '(' expr ')'  { $$ = $2; }
 372     |       NUMBER { $$ = new Number($1); }
 373     |       IDENT { $$ = new Ident(string($1)); }
 374     ;
 375 ]])
 376 AT_BISON_CHECK([-o test.c test.y], 1, [],
 377 [[test.y:24.36-41: error: invalid reference: '$cond1'
 378 test.y:23.11-24.62:  symbol not found in production: cond1
 379 test.y:26.43-53: error: invalid reference: '$stmt.field'
 380 test.y:25.11-26.60:  symbol not found in production: stmt
 381 test.y:25.35-38:     possibly meant: $then.field, hiding $stmt.field at $4
 382 test.y:28.43-52: error: invalid reference: '$stmt.list'
 383 test.y:27.11-28.59:  symbol not found in production: stmt
 384 test.y:27.30-38:     possibly meant: $[stmt.list] at $4
 385 test.y:30.43-46: error: ambiguous reference: '$xyz'
 386 test.y:29.35-37:     refers to: $xyz at $4
 387 test.y:29.50-52:     refers to: $xyz at $6
 388 test.y:32.43-52: error: invalid reference: '$stmt.list'
 389 test.y:31.11-32.63:  symbol not found in production: stmt
 390 test.y:31.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 391 test.y:31.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 392 test.y:34.43-58: error: invalid reference: '$stmt.list.field'
 393 test.y:33.11-34.69:  symbol not found in production: stmt
 394 test.y:33.40-43:     possibly meant: $then.field, hiding $[stmt.list].field at $4
 395 test.y:33.61-64:     possibly meant: $else.field, hiding $[stmt.list].field at $6
 396 test.y:36.43-54: error: invalid reference: '$[stmt.list]'
 397 test.y:35.11-36.71:  symbol not found in production: stmt.list
 398 test.y:35.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 399 test.y:35.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 400 test.y:38.43-49: error: invalid reference: '$then.1'
 401 test.y:37.11-38.60:  symbol not found in production: then
 402 test.y:37.40-45:     possibly meant: $[then.1] at $4
 403 test.y:40.43-55: error: invalid reference: '$then.1.field'
 404 test.y:39.11-40.66:  symbol not found in production: then
 405 test.y:39.40-45:     possibly meant: $[then.1].field at $4
 406 test.y:42.44-50: error: invalid reference: '$stmt.x'
 407 test.y:41.12-42.57:  symbol not found in production: stmt
 408 test.y:41.36-41:     possibly meant: $[stmt.x].x, hiding $stmt.x at $4
 409 test.y:41.36-41:     possibly meant: $[stmt.x] at $4
 410 test.y:44.13-22: error: invalid reference: '$if-stmt-a'
 411 test.y:43.12-44.59:  symbol not found in production: if
 412 test.y:43.1-9:       possibly meant: $[if-stmt-a] at $$
 413 test.y:46.46-54: error: invalid reference: '$then-a.f'
 414 test.y:45.12-46.65:  symbol not found in production: then
 415 test.y:45.41-46:     possibly meant: $[then-a].f at $4
 416 ]])
 417
 418 AT_BISON_CHECK([-fcaret -o test.c test.y], 1, [],
 419 [[test.y:24.36-41: error: invalid reference: '$cond1'
 420            { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
 421                                     ^^^^^^
 422 test.y:23.11-24.62:  symbol not found in production: cond1
 423  if_stmt1: IF expr[cond] THEN stmt[then] ELSE stmt.list[else] FI
 424            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 425 test.y:26.43-53: error: invalid reference: '$stmt.field'
 426            { $if_stmt2 = new IfStmt($cond, $stmt.field, 0); };
 427                                            ^^^^^^^^^^^
 428 test.y:25.11-26.60:  symbol not found in production: stmt
 429  if_stmt2: IF expr[cond] THEN stmt[then] FI
 430            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 431 test.y:25.35-38:     possibly meant: $then.field, hiding $stmt.field at $4
 432  if_stmt2: IF expr[cond] THEN stmt[then] FI
 433                                    ^^^^
 434 test.y:28.43-52: error: invalid reference: '$stmt.list'
 435            { $if_stmt3 = new IfStmt($cond, $stmt.list, 0); };
 436                                            ^^^^^^^^^^
 437 test.y:27.11-28.59:  symbol not found in production: stmt
 438  if_stmt3: IF expr[cond] THEN stmt.list FI
 439            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 440 test.y:27.30-38:     possibly meant: $[stmt.list] at $4
 441  if_stmt3: IF expr[cond] THEN stmt.list FI
 442                               ^^^^^^^^^
 443 test.y:30.43-46: error: ambiguous reference: '$xyz'
 444            { $if_stmt4 = new IfStmt($cond, $xyz, $cond); };
 445                                            ^^^^
 446 test.y:29.35-37:     refers to: $xyz at $4
 447  if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 448                                    ^^^
 449 test.y:29.50-52:     refers to: $xyz at $6
 450  if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 451                                                   ^^^
 452 test.y:32.43-52: error: invalid reference: '$stmt.list'
 453            { $if_stmt5 = new IfStmt($cond, $stmt.list, $else); };
 454                                            ^^^^^^^^^^
 455 test.y:31.11-32.63:  symbol not found in production: stmt
 456  if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 457            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 458 test.y:31.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 459  if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 460                                         ^^^^
 461 test.y:31.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 462  if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 463                                                              ^^^^
 464 test.y:34.43-58: error: invalid reference: '$stmt.list.field'
 465            { $if_stmt6 = new IfStmt($cond, $stmt.list.field, $else); };
 466                                            ^^^^^^^^^^^^^^^^
 467 test.y:33.11-34.69:  symbol not found in production: stmt
 468  if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 469            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 470 test.y:33.40-43:     possibly meant: $then.field, hiding $[stmt.list].field at $4
 471  if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 472                                         ^^^^
 473 test.y:33.61-64:     possibly meant: $else.field, hiding $[stmt.list].field at $6
 474  if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 475                                                              ^^^^
 476 test.y:36.43-54: error: invalid reference: '$[stmt.list]'
 477            { $if_stmt7 = new IfStmt($cond, $[stmt.list].field, $else); };
 478                                            ^^^^^^^^^^^^
 479 test.y:35.11-36.71:  symbol not found in production: stmt.list
 480  if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 481            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 482 test.y:35.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 483  if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 484                                         ^^^^
 485 test.y:35.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 486  if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 487                                                              ^^^^
 488 test.y:38.43-49: error: invalid reference: '$then.1'
 489            { $if_stmt8 = new IfStmt($cond, $then.1, $else); };
 490                                            ^^^^^^^
 491 test.y:37.11-38.60:  symbol not found in production: then
 492  if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 493            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 494 test.y:37.40-45:     possibly meant: $[then.1] at $4
 495  if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 496                                         ^^^^^^
 497 test.y:40.43-55: error: invalid reference: '$then.1.field'
 498            { $if_stmt9 = new IfStmt($cond, $then.1.field, $else); };
 499                                            ^^^^^^^^^^^^^
 500 test.y:39.11-40.66:  symbol not found in production: then
 501  if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 502            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 503 test.y:39.40-45:     possibly meant: $[then.1].field at $4
 504  if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 505                                         ^^^^^^
 506 test.y:42.44-50: error: invalid reference: '$stmt.x'
 507            { $if_stmt10 = new IfStmt($cond, $stmt.x, 0); };
 508                                             ^^^^^^^
 509 test.y:41.12-42.57:  symbol not found in production: stmt
 510  if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 511             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 512 test.y:41.36-41:     possibly meant: $[stmt.x].x, hiding $stmt.x at $4
 513  if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 514                                     ^^^^^^
 515 test.y:41.36-41:     possibly meant: $[stmt.x] at $4
 516  if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 517                                     ^^^^^^
 518 test.y:44.13-22: error: invalid reference: '$if-stmt-a'
 519            { $if-stmt-a = new IfStmt($cond, $then, $else); };
 520              ^^^^^^^^^^
 521 test.y:43.12-44.59:  symbol not found in production: if
 522  if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 523             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 524 test.y:43.1-9:       possibly meant: $[if-stmt-a] at $$
 525  if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 526  ^^^^^^^^^
 527 test.y:46.46-54: error: invalid reference: '$then-a.f'
 528            { $[if-stmt-b] = new IfStmt($cond, $then-a.f, $else); };
 529                                               ^^^^^^^^^
 530 test.y:45.12-46.65:  symbol not found in production: then
 531  if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 532             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 533 test.y:45.41-46:     possibly meant: $[then-a].f at $4
 534  if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 535                                          ^^^^^^
 536 ]])
 537
 538 AT_CLEANUP
 539
 540 #######################################################################
 541
 542 AT_SETUP([Missing identifiers in brackets])
 543 AT_DATA_GRAMMAR([test.y],
 544 [[
 545 %%
 546 start: foo[] bar
 547   { s = $foo; }
 548 ]])
 549 AT_BISON_CHECK([-o test.c test.y], 1, [],
 550 [[test.y:11.12: error: an identifier expected
 551 ]])
 552 AT_CLEANUP
 553
 554 #######################################################################
 555
 556 AT_SETUP([Redundant words in brackets])
 557 AT_DATA_GRAMMAR([test.y],
 558 [[
 559 %%
 560 start: foo[ a d ] bar
 561   { s = $foo; }
 562 ]])
 563 AT_BISON_CHECK([-o test.c test.y], 1, [],
 564 [[test.y:11.15: error: unexpected identifier in bracketed name: 'd'
 565 ]])
 566 AT_CLEANUP
 567
 568 #######################################################################
 569
 570 AT_SETUP([Comments in brackets])
 571 AT_DATA_GRAMMAR([test.y],
 572 [[
 573 %%
 574 start: foo[/* comment */] bar
 575   { s = $foo; }
 576 ]])
 577 AT_BISON_CHECK([-o test.c test.y], 1, [],
 578 [[test.y:11.25: error: an identifier expected
 579 ]])
 580 AT_CLEANUP
 581
 582 #######################################################################
 583
 584 AT_SETUP([Stray symbols in brackets])
 585 AT_DATA_GRAMMAR([test.y],
 586 [[
 587 %%
 588 start: foo[ % /* aaa */ *&-.+\000\001\002\377 ] bar
 589   { s = $foo; }
 590 ]])
 591 AT_CHECK([[$PERL -pi -e 's/\\(\d{3})/chr(oct($1))/ge' test.y || exit 77]])
 592 AT_BISON_CHECK([-o test.c test.y], 1, [],
 593 [[test.y:11.13: error: invalid character in bracketed name: '%'
 594 test.y:11.25-27: error: invalid characters in bracketed name: '*&-'
 595 test.y:11.29-30: error: invalid characters in bracketed name: '+\0\001\002\377'
 596 ]])
 597 AT_CLEANUP
 598
 599 #######################################################################
 600
 601 AT_SETUP([Redundant words in LHS brackets])
 602 AT_DATA_GRAMMAR([test.y],
 603 [[
 604 %%
 605 start[a s]: foo;
 606 ]])
 607 AT_BISON_CHECK([-o test.c test.y], 1, [],
 608 [[test.y:11.9: error: unexpected identifier in bracketed name: 's'
 609 ]])
 610 AT_CLEANUP
 611
 612 #######################################################################
 613
 614 # Bison used to free twice the named ref for "a", since a single copy
 615 # was used in two rules.
 616 AT_SETUP([Factored LHS])
 617 AT_DATA_GRAMMAR([test.y],
 618 [[
 619 %%
 620 start[a]: "foo" | "bar";
 621 ]])
 622 AT_BISON_CHECK([-o test.c test.y])
 623 AT_CLEANUP
 624
 625 #######################################################################
 626
 627 AT_SETUP([Unresolved references])
 628 AT_DATA_GRAMMAR([test.y],
 629 [[
 630 %%
 631 stat:
 632   sym_a sym_b { func($sym.field); }
 633 | sym_a sym_b { func($<aa>sym.field); }
 634 | sym_a sym_b { func($[sym.field]); }
 635 | sym_a sym_b { func($<aa>[sym.field]); }
 636 | sym_a sym_b { func($sym); }
 637 | sym_a sym_b { func($<aa>sym); }
 638 | sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
 639 ;
 640
 641 stat1:
 642   sym_a sym_b { func($sym-field); }
 643 | sym_a sym_b { func($<aa>sym-field); }
 644 | sym_a sym_b { func($[sym-field]); }
 645 | sym_a sym_b { func($<aa>[sym-field]); }
 646 | sym_a sym_b { func($sym); }
 647 | sym_a sym_b { func($<aa>sym); }
 648 | sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
 649 ;
 650
 651 sym_a: 'a';
 652 sym_b: 'b';
 653 ]])
 654 AT_BISON_CHECK([-o test.c test.y], 1, [],
 655 [[test.y:12.22-31: error: invalid reference: '$sym.field'
 656 test.y:12.3-35:      symbol not found in production: sym
 657 test.y:13.22-35: error: invalid reference: '$<aa>sym.field'
 658 test.y:13.3-39:      symbol not found in production: sym
 659 test.y:14.22-33: error: invalid reference: '$[sym.field]'
 660 test.y:14.3-37:      symbol not found in production: sym.field
 661 test.y:15.22-37: error: invalid reference: '$<aa>[sym.field]'
 662 test.y:15.3-41:      symbol not found in production: sym.field
 663 test.y:16.22-25: error: invalid reference: '$sym'
 664 test.y:16.3-29:      symbol not found in production: sym
 665 test.y:17.22-29: error: invalid reference: '$<aa>sym'
 666 test.y:17.3-33:      symbol not found in production: sym
 667 test.y:18.22-27: error: invalid reference: '$[sym]'
 668 test.y:18.3-65:      symbol not found in production before $3: sym
 669 test.y:18.52-61: error: invalid reference: '$<aa>[sym]'
 670 test.y:18.3-65:      symbol not found in production: sym
 671 test.y:22.22-31: error: invalid reference: '$sym-field'
 672 test.y:22.3-35:      symbol not found in production: sym
 673 test.y:23.22-35: error: invalid reference: '$<aa>sym-field'
 674 test.y:23.3-39:      symbol not found in production: sym
 675 test.y:24.22-33: error: invalid reference: '$[sym-field]'
 676 test.y:24.3-37:      symbol not found in production: sym-field
 677 test.y:25.22-37: error: invalid reference: '$<aa>[sym-field]'
 678 test.y:25.3-41:      symbol not found in production: sym-field
 679 test.y:26.22-25: error: invalid reference: '$sym'
 680 test.y:26.3-29:      symbol not found in production: sym
 681 test.y:27.22-29: error: invalid reference: '$<aa>sym'
 682 test.y:27.3-33:      symbol not found in production: sym
 683 test.y:28.22-27: error: invalid reference: '$[sym]'
 684 test.y:28.3-65:      symbol not found in production before $3: sym
 685 test.y:28.52-61: error: invalid reference: '$<aa>[sym]'
 686 test.y:28.3-65:      symbol not found in production: sym
 687 ]])
 688 AT_CLEANUP
 689
 690 #######################################################################
 691
 692 AT_SETUP([[$ or @ followed by . or -]])
 693 AT_DATA([[test.y]],
 694 [[
 695 %%
 696 start:
 697   .field { $.field; }
 698 | 'a'    { @.field; }
 699 ;
 700 .field: ;
 701 ]])
 702 AT_BISON_CHECK([[test.y]], [[1]], [],
 703 [[test.y:4.12-18: error: invalid reference: '$.field'
 704 test.y:4.13:        syntax error after '$', expecting integer, letter, '_', '@<:@', or '$'
 705 test.y:4.3-8:       possibly meant: $[.field] at $1
 706 test.y:5.12-18: error: invalid reference: '@.field'
 707 test.y:5.13:        syntax error after '@', expecting integer, letter, '_', '@<:@', or '$'
 708 ]])
 709 AT_DATA([[test.y]],
 710 [[
 711 %%
 712 start:
 713   'a' { $-field; }
 714 | 'b' { @-field; }
 715 ;
 716 ]])
 717 AT_BISON_CHECK([[test.y]], [[0]], [],
 718 [[test.y:4.9: warning: stray '$' [-Wother]
 719 test.y:5.9: warning: stray '@' [-Wother]
 720 ]])
 721 AT_CLEANUP