tests/named-refs.at

   1 # Named references test.                           -*- Autotest -*-
   2
   3 # Copyright (C) 2009 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 %left 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 %left 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: `$<ival>lo9', symbol not found
 259 test.y:51.51-60: warning: misleading reference: `$<ival>exp'
 260 test.y:42.1-3: warning:   refers to: $exp at $$
 261 test.y:51.7: warning:   possibly meant: $x, hiding $exp at $1
 262 test.y:51.41: warning:   possibly meant: $r, hiding $exp at $4
 263 test.y:52.51-52: $l of `exp' has no declared type
 264 test.y:55.46-49: invalid reference: `$r12', symbol not found
 265 test.y:56.29-33: invalid reference: `$expo', symbol not found
 266 ]])
 267 AT_CLEANUP
 268
 269 #######################################################################
 270
 271 AT_SETUP([Misleading references])
 272 AT_DATA_GRAMMAR([test.y],
 273 [[
 274 %%
 275 start: foo foo.bar { $foo.bar; }
 276 foo: '1'
 277 foo.bar: '2'
 278 ]])
 279 AT_BISON_CHECK([-o test.c test.y], 0, [],
 280 [[test.y:11.22-29: warning: misleading reference: `$foo.bar'
 281 test.y:11.8-10: warning:   refers to: $foo at $1
 282 test.y:11.12-18: warning:   possibly meant: $[foo.bar] at $2
 283 ]])
 284 AT_CLEANUP
 285
 286 #######################################################################
 287
 288 AT_SETUP([Many kinds of errors])
 289 AT_DATA_GRAMMAR([test.y],
 290 [[
 291 %token IDENT
 292 %token NUMBER
 293 %token ASSIGNOP
 294 %token IF
 295 %token IF1
 296 %token THEN
 297 %token ELSE
 298 %token FI
 299 %token WHILE
 300 %token DO
 301 %token OD
 302 %start program
 303 %%
 304 if_stmt1: IF expr[cond] THEN stmt[then] ELSE stmt.list[else] FI
 305           { $if_stmt1 = new IfStmt($cond1, $then.f1, $else); };
 306 if_stmt2: IF expr[cond] THEN stmt[then] FI
 307           { $if_stmt2 = new IfStmt($cond, $stmt.field, 0); };
 308 if_stmt3: IF expr[cond] THEN stmt.list FI
 309           { $if_stmt3 = new IfStmt($cond, $stmt.list, 0); };
 310 if_stmt4: IF expr[cond] THEN stmt[xyz] ELSE stmt[xyz] FI
 311           { $if_stmt4 = new IfStmt($cond, $xyz, $cond); };
 312 if_stmt5: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 313           { $if_stmt5 = new IfStmt($cond, $stmt.list, $else); };
 314 if_stmt6: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 315           { $if_stmt6 = new IfStmt($cond, $stmt.list.field, $else); };
 316 if_stmt7: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 317           { $if_stmt7 = new IfStmt($cond, $[stmt.list].field, $else); };
 318 if_stmt8: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 319           { $if_stmt8 = new IfStmt($cond, $then.1, $else); };
 320 if_stmt9: IF expr[cond] THEN stmt.list[then.1] ELSE stmt.list[else] FI
 321           { $if_stmt9 = new IfStmt($cond, $then.1.field, $else); };
 322 if_stmt10: IF expr[cond] THEN stmt[stmt.x] FI
 323           { $if_stmt10 = new IfStmt($cond, $stmt.x, 0); };
 324 if-stmt-a: IF expr[cond] THEN stmt.list[then] ELSE stmt.list[else] FI
 325           { $if-stmt-a = new IfStmt($cond, $then, $else); };
 326 if-stmt-b: IF expr[cond] THEN if-stmt-a[then-a] ELSE stmt.list[else] FI
 327           { $[if-stmt-b] = new IfStmt($cond, $then-a.f, $else); };
 328 program: stmt.list;
 329 stmt.list:  stmt ';' stmt.list { $3->insert($stmt); $$ = $3; }
 330         |   stmt ';' { SL = new StmtList();  SL->insert($1); $$ = SL; }
 331         ;
 332 stmt:  assign_stmt { $$ = $1; }
 333     |  if_stmt { $$ = $1; }
 334     |  if_stmt1 { $$ = $1; }
 335     |  while_stmt { $$ = $1; }
 336     ;
 337 assign_stmt: IDENT ASSIGNOP expr
 338        { $$ = new AssignStmt(string($1),$3); };
 339 if_stmt: IF expr[cond] THEN stmt.list FI
 340        { $if_stmt = new IfStmt($cond, $[stmt.list], 0); };
 341 while_stmt[res]: WHILE expr DO stmt.list OD
 342        { $res = new WhileStmt($[expr], $[stmt.list]); };
 343 expr: expr '+' term   { $$ = new Plus($1,$3); }
 344     | expr '-' term   { $$ = new Minus($1,$3); }
 345     | term            { $$ = $1; }
 346     ;
 347 term: term '*' factor   { $$ = new Times($1,$3); }
 348     | factor            { $$ = $1; }
 349     ;
 350 factor:     '(' expr ')'  { $$ = $2; }
 351     |       NUMBER { $$ = new Number($1); }
 352     |       IDENT { $$ = new Ident(string($1)); }
 353     ;
 354 ]])
 355 AT_BISON_CHECK([-o test.c test.y], 1, [],
 356 [[test.y:24.36-41: invalid reference: `$cond1', symbol not found
 357 test.y:26.43-53: invalid reference: `$stmt.field'
 358 test.y:25.35-38:   possibly meant: $then.field, hiding $stmt.field at $4
 359 test.y:28.43-52: invalid reference: `$stmt.list'
 360 test.y:27.30-38:   possibly meant: $[stmt.list] at $4
 361 test.y:30.43-46: ambiguous reference: `$xyz'
 362 test.y:29.35-37:   refers to: $xyz at $4
 363 test.y:29.50-52:   refers to: $xyz at $6
 364 test.y:32.43-52: invalid reference: `$stmt.list'
 365 test.y:31.40-43:   possibly meant: $then, hiding $[stmt.list] at $4
 366 test.y:31.61-64:   possibly meant: $else, hiding $[stmt.list] at $6
 367 test.y:34.43-58: invalid reference: `$stmt.list.field'
 368 test.y:33.40-43:   possibly meant: $then.field, hiding $[stmt.list].field at $4
 369 test.y:33.61-64:   possibly meant: $else.field, hiding $[stmt.list].field at $6
 370 test.y:36.43-54: invalid reference: `$[stmt.list]'
 371 test.y:35.40-43:   possibly meant: $then, hiding $[stmt.list] at $4
 372 test.y:35.61-64:   possibly meant: $else, hiding $[stmt.list] at $6
 373 test.y:38.43-49: invalid reference: `$then.1'
 374 test.y:37.40-45:   possibly meant: $[then.1] at $4
 375 test.y:40.43-55: invalid reference: `$then.1.field'
 376 test.y:39.40-45:   possibly meant: $[then.1].field at $4
 377 test.y:42.44-50: invalid reference: `$stmt.x'
 378 test.y:41.36-41:   possibly meant: $[stmt.x].x, hiding $stmt.x at $4
 379 test.y:41.36-41:   possibly meant: $[stmt.x] at $4
 380 test.y:44.13-22: invalid reference: `$if-stmt-a'
 381 test.y:43.1-9:   possibly meant: $[if-stmt-a] at $$
 382 test.y:46.46-54: invalid reference: `$then-a.f'
 383 test.y:45.41-46:   possibly meant: $[then-a].f at $4
 384 ]])
 385 AT_CLEANUP
 386
 387 #######################################################################
 388
 389 AT_SETUP([Missing identifiers in brackets])
 390 AT_DATA_GRAMMAR([test.y],
 391 [[
 392 %%
 393 start: foo[] bar
 394   { s = $foo; }
 395 ]])
 396 AT_BISON_CHECK([-o test.c test.y], 1, [],
 397 [[test.y:11.12: an identifier expected
 398 ]])
 399 AT_CLEANUP
 400
 401 #######################################################################
 402
 403 AT_SETUP([Redundant words in brackets])
 404 AT_DATA_GRAMMAR([test.y],
 405 [[
 406 %%
 407 start: foo[ a d ] bar
 408   { s = $foo; }
 409 ]])
 410 AT_BISON_CHECK([-o test.c test.y], 1, [],
 411 [[test.y:11.15: unexpected identifier in bracketed name: `d'
 412 ]])
 413 AT_CLEANUP
 414
 415 #######################################################################
 416
 417 AT_SETUP([Comments in brackets])
 418 AT_DATA_GRAMMAR([test.y],
 419 [[
 420 %%
 421 start: foo[/* comment */] bar
 422   { s = $foo; }
 423 ]])
 424 AT_BISON_CHECK([-o test.c test.y], 1, [],
 425 [[test.y:11.25: an identifier expected
 426 ]])
 427 AT_CLEANUP
 428
 429 #######################################################################
 430
 431 AT_SETUP([Stray symbols in brackets])
 432 AT_DATA_GRAMMAR([test.y],
 433 [[
 434 %%
 435 start: foo[ /* aaa */ *&-+ ] bar
 436   { s = $foo; }
 437 ]])
 438 AT_BISON_CHECK([-o test.c test.y], 1, [],
 439 [[test.y:11.23: invalid character in bracketed name: `*'
 440 test.y:11.24: invalid character in bracketed name: `&'
 441 test.y:11.26: invalid character in bracketed name: `+'
 442 ]])
 443 AT_CLEANUP
 444
 445 #######################################################################
 446
 447 AT_SETUP([Redundant words in LHS brackets])
 448 AT_DATA_GRAMMAR([test.y],
 449 [[
 450 %%
 451 start[a s]: foo
 452 ]])
 453 AT_BISON_CHECK([-o test.c test.y], 1, [],
 454 [[test.y:11.9: unexpected identifier in bracketed name: `s'
 455 ]])
 456 AT_CLEANUP