tests/named-refs.at

   1 # Named references test.                           -*- Autotest -*-
   2
   3 # Copyright (C) 2009-2015 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 ## Undefined and ambiguous references.  ##
 193 ## ------------------------------------ ##
 194
 195
 196 AT_SETUP([Undefined and ambiguous references])
 197 AT_BISON_OPTION_PUSHDEFS
 198 AT_DATA_GRAMMAR([test.y],
 199 [[
 200 %{
 201 static int power (int base, int exponent);
 202 ]AT_YYERROR_DECLARE[
 203 ]AT_YYLEX_DECLARE[
 204 %}
 205
 206 %union
 207 {
 208   int ival;
 209 };
 210
 211 %token CALC_EOF 0 "end of input"
 212 %token <ival> NUM "number"
 213 %type  <ival> exp
 214
 215 %nonassoc '='   /* comparison          */
 216 %left '-' '+'
 217 %left '*' '/'
 218 %precedence NEG /* negation--unary minus */
 219 %right '^'      /* exponentiation        */
 220
 221 %%
 222 input:
 223   line
 224 | input line         {}
 225 ;
 226
 227 line:
 228   '\n'
 229 | exp '\n'           {}
 230 ;
 231
 232 exp:
 233   NUM { $$ = $NUM; }
 234 | exp[l] '=' exp[r]
 235   {
 236     if ($l != $r)
 237       fprintf (stderr, "calc: error: %d != %d\n", $l, $r);
 238    $$ = $l;
 239   }
 240 | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
 241 | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 242 | exp[x] '*' { $<ival>$ = $x; } [l] exp[r] { $$ = $l * $r; }
 243 | exp[l] '/' exp[r]  { $$ = $l / $r;        }
 244 | '-' exp  %prec NEG { $$ = -$2;            }
 245 | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
 246 | '(' exp ')'        { $$ = $expo;           }
 247 | '(' error ')'      { $$ = 1111; yyerrok;  }
 248 | '!'                { $$ = 0; YYERROR;     }
 249 | '-' error          { $$ = 0; YYERROR;     }
 250 ;
 251 %%
 252 ]])
 253
 254 AT_BISON_CHECK([-fcaret -o test.c test.y], 1, [],
 255 [[test.y:52.51-60: error: invalid reference: '$<ival>lo9'
 256  | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
 257                                                    ^^^^^^^^^^
 258 test.y:52.3-68:      symbol not found in production: lo9
 259  | exp[x] '+' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>lo9 + $r; }
 260    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 261 test.y:53.51-60: warning: misleading reference: '$<ival>exp' [-Wother]
 262  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 263                                                    ^^^^^^^^^^
 264 test.y:44.1-3:       refers to: $exp at $$
 265  exp:
 266  ^^^
 267 test.y:53.7:         possibly meant: $x, hiding $exp at $1
 268  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 269        ^
 270 test.y:53.41:        possibly meant: $r, hiding $exp at $4
 271  | exp[x] '-' { $<ival>$ = $x; } [l] exp[r] { $$ = $<ival>exp - $r; }
 272                                          ^
 273 test.y:54.51-52: error: $l of 'exp' has no declared type
 274  | exp[x] '*' { $<ival>$ = $x; } [l] exp[r] { $$ = $l * $r; }
 275                                                    ^^
 276 test.y:57.40-43: error: invalid reference: '$r12'
 277  | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
 278                                         ^^^^
 279 test.y:57.3-47:      symbol not found in production: r12
 280  | exp[l] '^' exp[r]  { $$ = power ($l, $r12); }
 281    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 282 test.y:58.29-33: error: invalid reference: '$expo'
 283  | '(' exp ')'        { $$ = $expo;           }
 284                              ^^^^^
 285 test.y:58.3-46:      symbol not found in production: expo
 286  | '(' exp ')'        { $$ = $expo;           }
 287    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 288 ]])
 289 AT_BISON_OPTION_POPDEFS
 290 AT_CLEANUP
 291
 292
 293 ## ----------------------- ##
 294 ## Misleading references.  ##
 295 ## ----------------------- ##
 296
 297 AT_SETUP([Misleading references])
 298 AT_DATA_GRAMMAR([test.y],
 299 [[
 300 %%
 301 start: foo foo.bar { $foo.bar; }
 302 foo: '1'
 303 foo.bar: '2'
 304 ]])
 305 AT_BISON_CHECK([-o test.c test.y], 0, [],
 306 [[test.y:11.22-29: warning: misleading reference: '$foo.bar' [-Wother]
 307 test.y:11.8-10:      refers to: $foo at $1
 308 test.y:11.12-18:     possibly meant: $[foo.bar] at $2
 309 ]])
 310 AT_CLEANUP
 311
 312 #######################################################################
 313
 314 AT_SETUP([Many kinds of errors])
 315 AT_DATA_GRAMMAR([test.y],
 316 [[
 317 %token IDENT
 318 %token NUMBER
 319 %token ASSIGNOP
 320 %token IF
 321 %token IF1
 322 %token THEN
 323 %token ELSE
 324 %token FI
 325 %token WHILE
 326 %token DO
 327 %token OD
 328 %start program
 329 %%
 330 if_stmt1: IF expr[cond] THEN stmt[then] ELSE stmt.list[else] FI
 331           { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
 332 if_stmt2: IF expr[cond] THEN stmt[then] FI
 333           { $if_stmt2 = new IfStmt($cond, $stmt.field, 0); };
 334 if_stmt3: IF expr[cond] THEN stmt.list FI
 335           { $if_stmt3 = new IfStmt($cond, $stmt.list, 0); };
 336 if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 337           { $if_stmt4 = new IfStmt($cond, $xyz, $cond); };
 338 if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 339           { $if_stmt5 = new IfStmt($cond, $stmt.list, $else); };
 340 if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 341           { $if_stmt6 = new IfStmt($cond, $stmt.list.field, $else); };
 342 if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 343           { $if_stmt7 = new IfStmt($cond, $[stmt.list].field, $else); };
 344 if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 345           { $if_stmt8 = new IfStmt($cond, $then.1, $else); };
 346 if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 347           { $if_stmt9 = new IfStmt($cond, $then.1.field, $else); };
 348 if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 349           { $if_stmt10 = new IfStmt($cond, $stmt.x, 0); };
 350 if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 351           { $if-stmt-a = new IfStmt($cond, $then, $else); };
 352 if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 353           { $[if-stmt-b] = new IfStmt($cond, $then-a.f, $else); };
 354 program: stmt.list;
 355 stmt.list:  stmt ';' stmt.list { $3->insert($stmt); $$ = $3; }
 356         |   stmt ';' { SL = new StmtList();  SL->insert($1); $$ = SL; }
 357         ;
 358 stmt:  assign_stmt { $$ = $1; }
 359     |  if_stmt { $$ = $1; }
 360     |  if_stmt1 { $$ = $1; }
 361     |  while_stmt { $$ = $1; }
 362     ;
 363 assign_stmt: IDENT ASSIGNOP expr
 364        { $$ = new AssignStmt(string($1),$3); };
 365 if_stmt: IF expr[cond] THEN stmt.list FI
 366        { $if_stmt = new IfStmt($cond, $[stmt.list], 0); };
 367 while_stmt[res]: WHILE expr DO stmt.list OD
 368        { $res = new WhileStmt($[expr], $[stmt.list]); };
 369 expr: expr '+' term   { $$ = new Plus($1,$3); }
 370     | expr '-' term   { $$ = new Minus($1,$3); }
 371     | term            { $$ = $1; }
 372     ;
 373 term: term '*' factor   { $$ = new Times($1,$3); }
 374     | factor            { $$ = $1; }
 375     ;
 376 factor:     '(' expr ')'  { $$ = $2; }
 377     |       NUMBER { $$ = new Number($1); }
 378     |       IDENT { $$ = new Ident(string($1)); }
 379     ;
 380 ]])
 381 AT_BISON_CHECK([-o test.c test.y], 1, [],
 382 [[test.y:24.36-41: error: invalid reference: '$cond1'
 383 test.y:23.11-24.62:  symbol not found in production: cond1
 384 test.y:26.43-53: error: invalid reference: '$stmt.field'
 385 test.y:25.11-26.60:  symbol not found in production: stmt
 386 test.y:25.35-38:     possibly meant: $then.field, hiding $stmt.field at $4
 387 test.y:28.43-52: error: invalid reference: '$stmt.list'
 388 test.y:27.11-28.59:  symbol not found in production: stmt
 389 test.y:27.30-38:     possibly meant: $[stmt.list] at $4
 390 test.y:30.43-46: error: ambiguous reference: '$xyz'
 391 test.y:29.35-37:     refers to: $xyz at $4
 392 test.y:29.50-52:     refers to: $xyz at $6
 393 test.y:32.43-52: error: invalid reference: '$stmt.list'
 394 test.y:31.11-32.63:  symbol not found in production: stmt
 395 test.y:31.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 396 test.y:31.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 397 test.y:34.43-58: error: invalid reference: '$stmt.list.field'
 398 test.y:33.11-34.69:  symbol not found in production: stmt
 399 test.y:33.40-43:     possibly meant: $then.field, hiding $[stmt.list].field at $4
 400 test.y:33.61-64:     possibly meant: $else.field, hiding $[stmt.list].field at $6
 401 test.y:36.43-54: error: invalid reference: '$[stmt.list]'
 402 test.y:35.11-36.71:  symbol not found in production: stmt.list
 403 test.y:35.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 404 test.y:35.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 405 test.y:38.43-49: error: invalid reference: '$then.1'
 406 test.y:37.11-38.60:  symbol not found in production: then
 407 test.y:37.40-45:     possibly meant: $[then.1] at $4
 408 test.y:40.43-55: error: invalid reference: '$then.1.field'
 409 test.y:39.11-40.66:  symbol not found in production: then
 410 test.y:39.40-45:     possibly meant: $[then.1].field at $4
 411 test.y:42.44-50: error: invalid reference: '$stmt.x'
 412 test.y:41.12-42.57:  symbol not found in production: stmt
 413 test.y:41.36-41:     possibly meant: $[stmt.x].x, hiding $stmt.x at $4
 414 test.y:41.36-41:     possibly meant: $[stmt.x] at $4
 415 test.y:44.13-22: error: invalid reference: '$if-stmt-a'
 416 test.y:43.12-44.59:  symbol not found in production: if
 417 test.y:43.1-9:       possibly meant: $[if-stmt-a] at $$
 418 test.y:46.46-54: error: invalid reference: '$then-a.f'
 419 test.y:45.12-46.65:  symbol not found in production: then
 420 test.y:45.41-46:     possibly meant: $[then-a].f at $4
 421 ]])
 422
 423 AT_BISON_CHECK([-fcaret -o test.c test.y], 1, [],
 424 [[test.y:24.36-41: error: invalid reference: '$cond1'
 425            { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
 426                                     ^^^^^^
 427 test.y:23.11-24.62:  symbol not found in production: cond1
 428  if_stmt1: IF expr[cond] THEN stmt[then] ELSE stmt.list[else] FI
 429            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 430 test.y:26.43-53: error: invalid reference: '$stmt.field'
 431            { $if_stmt2 = new IfStmt($cond, $stmt.field, 0); };
 432                                            ^^^^^^^^^^^
 433 test.y:25.11-26.60:  symbol not found in production: stmt
 434  if_stmt2: IF expr[cond] THEN stmt[then] FI
 435            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 436 test.y:25.35-38:     possibly meant: $then.field, hiding $stmt.field at $4
 437  if_stmt2: IF expr[cond] THEN stmt[then] FI
 438                                    ^^^^
 439 test.y:28.43-52: error: invalid reference: '$stmt.list'
 440            { $if_stmt3 = new IfStmt($cond, $stmt.list, 0); };
 441                                            ^^^^^^^^^^
 442 test.y:27.11-28.59:  symbol not found in production: stmt
 443  if_stmt3: IF expr[cond] THEN stmt.list FI
 444            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 445 test.y:27.30-38:     possibly meant: $[stmt.list] at $4
 446  if_stmt3: IF expr[cond] THEN stmt.list FI
 447                               ^^^^^^^^^
 448 test.y:30.43-46: error: ambiguous reference: '$xyz'
 449            { $if_stmt4 = new IfStmt($cond, $xyz, $cond); };
 450                                            ^^^^
 451 test.y:29.35-37:     refers to: $xyz at $4
 452  if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 453                                    ^^^
 454 test.y:29.50-52:     refers to: $xyz at $6
 455  if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 456                                                   ^^^
 457 test.y:32.43-52: error: invalid reference: '$stmt.list'
 458            { $if_stmt5 = new IfStmt($cond, $stmt.list, $else); };
 459                                            ^^^^^^^^^^
 460 test.y:31.11-32.63:  symbol not found in production: stmt
 461  if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 462            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 463 test.y:31.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 464  if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 465                                         ^^^^
 466 test.y:31.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 467  if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 468                                                              ^^^^
 469 test.y:34.43-58: error: invalid reference: '$stmt.list.field'
 470            { $if_stmt6 = new IfStmt($cond, $stmt.list.field, $else); };
 471                                            ^^^^^^^^^^^^^^^^
 472 test.y:33.11-34.69:  symbol not found in production: stmt
 473  if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 474            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 475 test.y:33.40-43:     possibly meant: $then.field, hiding $[stmt.list].field at $4
 476  if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 477                                         ^^^^
 478 test.y:33.61-64:     possibly meant: $else.field, hiding $[stmt.list].field at $6
 479  if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 480                                                              ^^^^
 481 test.y:36.43-54: error: invalid reference: '$[stmt.list]'
 482            { $if_stmt7 = new IfStmt($cond, $[stmt.list].field, $else); };
 483                                            ^^^^^^^^^^^^
 484 test.y:35.11-36.71:  symbol not found in production: stmt.list
 485  if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 486            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 487 test.y:35.40-43:     possibly meant: $then, hiding $[stmt.list] at $4
 488  if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 489                                         ^^^^
 490 test.y:35.61-64:     possibly meant: $else, hiding $[stmt.list] at $6
 491  if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 492                                                              ^^^^
 493 test.y:38.43-49: error: invalid reference: '$then.1'
 494            { $if_stmt8 = new IfStmt($cond, $then.1, $else); };
 495                                            ^^^^^^^
 496 test.y:37.11-38.60:  symbol not found in production: then
 497  if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 498            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 499 test.y:37.40-45:     possibly meant: $[then.1] at $4
 500  if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 501                                         ^^^^^^
 502 test.y:40.43-55: error: invalid reference: '$then.1.field'
 503            { $if_stmt9 = new IfStmt($cond, $then.1.field, $else); };
 504                                            ^^^^^^^^^^^^^
 505 test.y:39.11-40.66:  symbol not found in production: then
 506  if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 507            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 508 test.y:39.40-45:     possibly meant: $[then.1].field at $4
 509  if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 510                                         ^^^^^^
 511 test.y:42.44-50: error: invalid reference: '$stmt.x'
 512            { $if_stmt10 = new IfStmt($cond, $stmt.x, 0); };
 513                                             ^^^^^^^
 514 test.y:41.12-42.57:  symbol not found in production: stmt
 515  if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 516             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 517 test.y:41.36-41:     possibly meant: $[stmt.x].x, hiding $stmt.x at $4
 518  if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 519                                     ^^^^^^
 520 test.y:41.36-41:     possibly meant: $[stmt.x] at $4
 521  if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 522                                     ^^^^^^
 523 test.y:44.13-22: error: invalid reference: '$if-stmt-a'
 524            { $if-stmt-a = new IfStmt($cond, $then, $else); };
 525              ^^^^^^^^^^
 526 test.y:43.12-44.59:  symbol not found in production: if
 527  if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 528             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 529 test.y:43.1-9:       possibly meant: $[if-stmt-a] at $$
 530  if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 531  ^^^^^^^^^
 532 test.y:46.46-54: error: invalid reference: '$then-a.f'
 533            { $[if-stmt-b] = new IfStmt($cond, $then-a.f, $else); };
 534                                               ^^^^^^^^^
 535 test.y:45.12-46.65:  symbol not found in production: then
 536  if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 537             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 538 test.y:45.41-46:     possibly meant: $[then-a].f at $4
 539  if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 540                                          ^^^^^^
 541 ]])
 542
 543 AT_CLEANUP
 544
 545 #######################################################################
 546
 547 AT_SETUP([Missing identifiers in brackets])
 548 AT_DATA_GRAMMAR([test.y],
 549 [[
 550 %%
 551 start: foo[] bar
 552   { s = $foo; }
 553 ]])
 554 AT_BISON_CHECK([-o test.c test.y], 1, [],
 555 [[test.y:11.12: error: an identifier expected
 556 ]])
 557 AT_CLEANUP
 558
 559 #######################################################################
 560
 561 AT_SETUP([Redundant words in brackets])
 562 AT_DATA_GRAMMAR([test.y],
 563 [[
 564 %%
 565 start: foo[ a d ] bar
 566   { s = $foo; }
 567 ]])
 568 AT_BISON_CHECK([-o test.c test.y], 1, [],
 569 [[test.y:11.15: error: unexpected identifier in bracketed name: 'd'
 570 ]])
 571 AT_CLEANUP
 572
 573 #######################################################################
 574
 575 AT_SETUP([Comments in brackets])
 576 AT_DATA_GRAMMAR([test.y],
 577 [[
 578 %%
 579 start: foo[/* comment */] bar
 580   { s = $foo; }
 581 ]])
 582 AT_BISON_CHECK([-o test.c test.y], 1, [],
 583 [[test.y:11.25: error: an identifier expected
 584 ]])
 585 AT_CLEANUP
 586
 587 #######################################################################
 588
 589 AT_SETUP([Stray symbols in brackets])
 590 AT_DATA_GRAMMAR([test.y],
 591 [[
 592 %%
 593 start: foo[ % /* aaa */ *&-.+\000\001\002\377 ] bar
 594   { s = $foo; }
 595 ]])
 596 AT_CHECK([[$PERL -pi -e 's/\\(\d{3})/chr(oct($1))/ge' test.y || exit 77]])
 597 AT_BISON_CHECK([-o test.c test.y], 1, [],
 598 [[test.y:11.13: error: invalid character in bracketed name: '%'
 599 test.y:11.25-27: error: invalid characters in bracketed name: '*&-'
 600 test.y:11.29-30: error: invalid characters in bracketed name: '+\0\001\002\377'
 601 ]])
 602 AT_CLEANUP
 603
 604 #######################################################################
 605
 606 AT_SETUP([Redundant words in LHS brackets])
 607 AT_DATA_GRAMMAR([test.y],
 608 [[
 609 %%
 610 start[a s]: foo;
 611 ]])
 612 AT_BISON_CHECK([-o test.c test.y], 1, [],
 613 [[test.y:11.9: error: unexpected identifier in bracketed name: 's'
 614 ]])
 615 AT_CLEANUP
 616
 617 #######################################################################
 618
 619 # Bison used to free twice the named ref for "a", since a single copy
 620 # was used in two rules.
 621 AT_SETUP([Factored LHS])
 622 AT_DATA_GRAMMAR([test.y],
 623 [[
 624 %%
 625 start[a]: "foo" | "bar";
 626 ]])
 627 AT_BISON_CHECK([-o test.c test.y])
 628 AT_CLEANUP
 629
 630 #######################################################################
 631
 632 AT_SETUP([Unresolved references])
 633 AT_DATA_GRAMMAR([test.y],
 634 [[
 635 %%
 636 stat:
 637   sym_a sym_b { func($sym.field); }
 638 | sym_a sym_b { func($<aa>sym.field); }
 639 | sym_a sym_b { func($[sym.field]); }
 640 | sym_a sym_b { func($<aa>[sym.field]); }
 641 | sym_a sym_b { func($sym); }
 642 | sym_a sym_b { func($<aa>sym); }
 643 | sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
 644 ;
 645
 646 stat1:
 647   sym_a sym_b { func($sym-field); }
 648 | sym_a sym_b { func($<aa>sym-field); }
 649 | sym_a sym_b { func($[sym-field]); }
 650 | sym_a sym_b { func($<aa>[sym-field]); }
 651 | sym_a sym_b { func($sym); }
 652 | sym_a sym_b { func($<aa>sym); }
 653 | sym_a sym_b { func($[sym]); } sym_a sym_b { func($<aa>[sym]); }
 654 ;
 655
 656 sym_a: 'a';
 657 sym_b: 'b';
 658 ]])
 659 AT_BISON_CHECK([-o test.c test.y], 1, [],
 660 [[test.y:12.22-31: error: invalid reference: '$sym.field'
 661 test.y:12.3-35:      symbol not found in production: sym
 662 test.y:13.22-35: error: invalid reference: '$<aa>sym.field'
 663 test.y:13.3-39:      symbol not found in production: sym
 664 test.y:14.22-33: error: invalid reference: '$[sym.field]'
 665 test.y:14.3-37:      symbol not found in production: sym.field
 666 test.y:15.22-37: error: invalid reference: '$<aa>[sym.field]'
 667 test.y:15.3-41:      symbol not found in production: sym.field
 668 test.y:16.22-25: error: invalid reference: '$sym'
 669 test.y:16.3-29:      symbol not found in production: sym
 670 test.y:17.22-29: error: invalid reference: '$<aa>sym'
 671 test.y:17.3-33:      symbol not found in production: sym
 672 test.y:18.22-27: error: invalid reference: '$[sym]'
 673 test.y:18.3-65:      symbol not found in production before $3: sym
 674 test.y:18.52-61: error: invalid reference: '$<aa>[sym]'
 675 test.y:18.3-65:      symbol not found in production: sym
 676 test.y:22.22-31: error: invalid reference: '$sym-field'
 677 test.y:22.3-35:      symbol not found in production: sym
 678 test.y:23.22-35: error: invalid reference: '$<aa>sym-field'
 679 test.y:23.3-39:      symbol not found in production: sym
 680 test.y:24.22-33: error: invalid reference: '$[sym-field]'
 681 test.y:24.3-37:      symbol not found in production: sym-field
 682 test.y:25.22-37: error: invalid reference: '$<aa>[sym-field]'
 683 test.y:25.3-41:      symbol not found in production: sym-field
 684 test.y:26.22-25: error: invalid reference: '$sym'
 685 test.y:26.3-29:      symbol not found in production: sym
 686 test.y:27.22-29: error: invalid reference: '$<aa>sym'
 687 test.y:27.3-33:      symbol not found in production: sym
 688 test.y:28.22-27: error: invalid reference: '$[sym]'
 689 test.y:28.3-65:      symbol not found in production before $3: sym
 690 test.y:28.52-61: error: invalid reference: '$<aa>[sym]'
 691 test.y:28.3-65:      symbol not found in production: sym
 692 ]])
 693 AT_CLEANUP
 694
 695 #######################################################################
 696
 697 AT_SETUP([[$ or @ followed by . or -]])
 698 AT_DATA([[test.y]],
 699 [[
 700 %%
 701 start:
 702   .field { $.field; }
 703 | 'a'    { @.field; }
 704 ;
 705 .field: ;
 706 ]])
 707 AT_BISON_CHECK([[test.y]], [[1]], [],
 708 [[test.y:4.12-18: error: invalid reference: '$.field'
 709 test.y:4.13:        syntax error after '$', expecting integer, letter, '_', '@<:@', or '$'
 710 test.y:4.3-8:       possibly meant: $[.field] at $1
 711 test.y:5.12-18: error: invalid reference: '@.field'
 712 test.y:5.13:        syntax error after '@', expecting integer, letter, '_', '@<:@', or '$'
 713 ]])
 714 AT_DATA([[test.y]],
 715 [[
 716 %%
 717 start:
 718   'a' { $-field; }
 719 | 'b' { @-field; }
 720 ;
 721 ]])
 722 AT_BISON_CHECK([[test.y]], [[0]], [],
 723 [[test.y:4.9: warning: stray '$' [-Wother]
 724 test.y:5.9: warning: stray '@' [-Wother]
 725 ]])
 726 AT_CLEANUP