tests/cxx-type.at

   1 # Checking GLR Parsing.                         -*- Autotest -*-
   2
   3 # Copyright (C) 2002-2012 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([[C++ Type Syntax (GLR).]])
  19
  20 # _AT_TEST_GLR_CXXTYPES(DECL, RESOLVE1, RESOLVE2)
  21 # -----------------------------------------------
  22 # Store into types.y the calc program, with DECL inserted as a declaration,
  23 # and with RESOLVE1 and RESOLVE2 as annotations on the conflicted rule for
  24 # stmt.  Then compile the result.
  25 m4_define([_AT_TEST_GLR_CXXTYPES],
  26 [
  27 AT_BISON_OPTION_PUSHDEFS([$1])
  28
  29 AT_DATA_GRAMMAR([types.y],
  30 [[/* Simplified C++ Type and Expression Grammar.  */
  31
  32 $1
  33
  34 %{
  35   #include <stdio.h>
  36   union Node {
  37     struct {
  38       int isNterm;
  39       int parents;
  40     } nodeInfo;
  41     struct {
  42       int isNterm; /* 1 */
  43       int parents;
  44       char const *form;
  45       union Node *children[3];
  46     } nterm;
  47     struct {
  48       int isNterm; /* 0 */
  49       int parents;
  50       char *text;
  51     } term;
  52   };
  53   typedef union Node Node;
  54   static Node *new_nterm (char const *, Node *, Node *, Node *);
  55   static Node *new_term (char *);
  56   static void free_node (Node *);
  57   static char *node_to_string (Node *);
  58   #define YYSTYPE Node *
  59 ]m4_bmatch([$2], [stmtMerge],
  60 [ static YYSTYPE stmtMerge (YYSTYPE x0, YYSTYPE x1);])[
  61   #define YYINITDEPTH 10
  62   #define YYSTACKEXPANDABLE 1
  63   struct YYLTYPE;
  64 #if YYPURE
  65 # if YYLSP_NEEDED
  66 #  define LEX_PARAMETERS YYSTYPE *lvalp, struct YYLTYPE *llocp
  67 #  define ERROR_PARAMETERS struct YYLTYPE *llocp, char const *s
  68 # else
  69 #  define LEX_PARAMETERS YYSTYPE *lvalp
  70 # endif
  71 #endif
  72 #ifndef LEX_PARAMETERS
  73 # define LEX_PARAMETERS void
  74 #endif
  75 #ifndef ERROR_PARAMETERS
  76 # define ERROR_PARAMETERS char const *s
  77 #endif
  78   int yylex (LEX_PARAMETERS);
  79   void yyerror (ERROR_PARAMETERS);
  80 %}
  81
  82 %token TYPENAME ID
  83
  84 %right '='
  85 %left '+'
  86
  87 %glr-parser
  88
  89 %destructor { free_node ($$); } stmt expr decl declarator TYPENAME ID
  90
  91 %%
  92
  93 prog :
  94      | prog stmt   {
  95                         char *output;]AT_LOCATION_IF([
  96                         printf ("%d.%d-%d.%d: ",
  97                              @2.first_line, @2.first_column,
  98                              @2.last_line, @2.last_column);])[
  99                         output = node_to_string (]$[2);
 100                         printf ("%s\n", output);
 101                         free (output);
 102                         free_node (]$[2);
 103                    }
 104      ;
 105
 106 stmt : expr ';'  $2     { $$ = ]$[1; }
 107      | decl      $3
 108      | error ';'        { $$ = new_nterm ("<error>", YY_NULL, YY_NULL, YY_NULL); }
 109      | '@'              { YYACCEPT; }
 110      ;
 111
 112 expr : ID
 113      | TYPENAME '(' expr ')'
 114                         { $$ = new_nterm ("<cast>(%s,%s)", ]$[3, ]$[1, YY_NULL); }
 115      | expr '+' expr    { $$ = new_nterm ("+(%s,%s)", ]$[1, ]$[3, YY_NULL); }
 116      | expr '=' expr    { $$ = new_nterm ("=(%s,%s)", ]$[1, ]$[3, YY_NULL); }
 117      ;
 118
 119 decl : TYPENAME declarator ';'
 120                         { $$ = new_nterm ("<declare>(%s,%s)", ]$[1, ]$[2, YY_NULL); }
 121      | TYPENAME declarator '=' expr ';'
 122                         { $$ = new_nterm ("<init-declare>(%s,%s,%s)", ]$[1,
 123                                           ]$[2, ]$[4); }
 124      ;
 125
 126 declarator : ID
 127      | '(' declarator ')' { $$ = ]$[2; }
 128      ;
 129
 130 %%
 131
 132 #include <ctype.h>
 133 #include <stdlib.h>
 134 #include <string.h>
 135 #include <stdarg.h>
 136
 137 int
 138 main (int argc, char **argv)
 139 {
 140   if (argc != 2)
 141     abort ();
 142   if (!freopen (argv[1], "r", stdin))
 143     return 3;
 144   return yyparse ();
 145 }
 146
 147 int
 148 yylex (LEX_PARAMETERS)
 149 {
 150   char buffer[256];
 151   int c;
 152   unsigned int i;
 153   static int lineNum = 1;
 154   static int colNum = 0;
 155
 156 #if YYPURE
 157 # undef yylloc
 158 # define yylloc (*llocp)
 159 # undef yylval
 160 # define yylval (*lvalp)
 161 #endif
 162
 163   while (1)
 164     {
 165       if (feof (stdin))
 166         abort ();
 167       c = getchar ();
 168       switch (c)
 169         {
 170         case EOF:
 171           return 0;
 172         case '\t':
 173           colNum = (colNum + 7) & ~7;
 174           break;
 175         case ' ': case '\f':
 176           colNum += 1;
 177           break;
 178         case '\n':
 179           lineNum += 1;
 180           colNum = 0;
 181           break;
 182         default:
 183           {
 184             int tok;
 185 #if YYLSP_NEEDED
 186             yylloc.first_line = yylloc.last_line = lineNum;
 187             yylloc.first_column = colNum;
 188 #endif
 189             if (isalpha (c))
 190               {
 191                 i = 0;
 192
 193                 do
 194                   {
 195                     buffer[i++] = c;
 196                     colNum += 1;
 197                     if (i == sizeof buffer - 1)
 198                       abort ();
 199                     c = getchar ();
 200                   }
 201                 while (isalnum (c) || c == '_');
 202
 203                 ungetc (c, stdin);
 204                 buffer[i++] = 0;
 205                 tok = isupper ((unsigned char) buffer[0]) ? TYPENAME : ID;
 206                 yylval = new_term (strcpy ((char *) malloc (i), buffer));
 207               }
 208             else
 209               {
 210                 colNum += 1;
 211                 tok = c;
 212                 yylval = YY_NULL;
 213               }
 214 #if YYLSP_NEEDED
 215             yylloc.last_column = colNum-1;
 216 #endif
 217             return tok;
 218           }
 219         }
 220     }
 221 }
 222
 223 void
 224 yyerror (ERROR_PARAMETERS)
 225 {
 226 #if YYPURE && YYLSP_NEEDED
 227   /* Pacify GCC by using llocp.  */
 228   if (! llocp)
 229     abort ();
 230 #endif
 231   fprintf (stderr, "%s\n", s);
 232 }
 233
 234 static Node *
 235 new_nterm (char const *form, Node *child0, Node *child1, Node *child2)
 236 {
 237   Node *node = (Node *) malloc (sizeof (Node));
 238   node->nterm.isNterm = 1;
 239   node->nterm.parents = 0;
 240   node->nterm.form = form;
 241   node->nterm.children[0] = child0;
 242   if (child0)
 243     child0->nodeInfo.parents += 1;
 244   node->nterm.children[1] = child1;
 245   if (child1)
 246     child1->nodeInfo.parents += 1;
 247   node->nterm.children[2] = child2;
 248   if (child2)
 249     child2->nodeInfo.parents += 1;
 250   return node;
 251 }
 252
 253 static Node *
 254 new_term (char *text)
 255 {
 256   Node *node = (Node *) malloc (sizeof (Node));
 257   node->term.isNterm = 0;
 258   node->term.parents = 0;
 259   node->term.text = text;
 260   return node;
 261 }
 262
 263 static void
 264 free_node (Node *node)
 265 {
 266   if (!node)
 267     return;
 268   node->nodeInfo.parents -= 1;
 269   /* Free only if 0 (last parent) or -1 (no parents).  */
 270   if (node->nodeInfo.parents > 0)
 271     return;
 272   if (node->nodeInfo.isNterm == 1)
 273     {
 274       free_node (node->nterm.children[0]);
 275       free_node (node->nterm.children[1]);
 276       free_node (node->nterm.children[2]);
 277     }
 278   else
 279     free (node->term.text);
 280   free (node);
 281 }
 282
 283 static char *
 284 node_to_string (Node *node)
 285 {
 286   char *child0;
 287   char *child1;
 288   char *child2;
 289   char *buffer;
 290   if (!node)
 291     {
 292       buffer = (char *) malloc (1);
 293       buffer[0] = 0;
 294     }
 295   else if (node->nodeInfo.isNterm == 1)
 296     {
 297       child0 = node_to_string (node->nterm.children[0]);
 298       child1 = node_to_string (node->nterm.children[1]);
 299       child2 = node_to_string (node->nterm.children[2]);
 300       buffer = (char *) malloc (strlen (node->nterm.form) + strlen (child0)
 301                                 + strlen (child1) + strlen (child2) + 1);
 302       sprintf (buffer, node->nterm.form, child0, child1, child2);
 303       free (child0);
 304       free (child1);
 305       free (child2);
 306     }
 307   else
 308     buffer = strdup (node->term.text);
 309   return buffer;
 310 }
 311
 312 ]]
 313 m4_bmatch([$2], [stmtMerge],
 314 [[static YYSTYPE
 315 stmtMerge (YYSTYPE x0, YYSTYPE x1)
 316 {
 317   return new_nterm ("<OR>(%s,%s)", x0, x1, YY_NULL);
 318 }
 319 ]])
 320 )
 321
 322 AT_DATA([test-input],
 323 [[
 324
 325 z + q;
 326
 327 T x;
 328
 329 T x = y;
 330
 331 x = y;
 332
 333 T (x) + y;
 334
 335 T (x);
 336
 337 T (y) = z + q;
 338
 339 T (y y) = z + q;
 340
 341 z + q;
 342
 343 @
 344
 345 This is total garbage, but it should be ignored.
 346 ]])
 347
 348 AT_BISON_CHECK([-o types.c types.y], 0, [], ignore)
 349 AT_COMPILE([types])
 350 AT_BISON_OPTION_POPDEFS
 351 ])
 352
 353 m4_define([_AT_RESOLVED_GLR_OUTPUT],
 354 [[[+(z,q)
 355 <declare>(T,x)
 356 <init-declare>(T,x,y)
 357 =(x,y)
 358 +(<cast>(x,T),y)
 359 <declare>(T,x)
 360 <init-declare>(T,y,+(z,q))
 361 <error>
 362 +(z,q)
 363 ]]])
 364
 365 m4_define([_AT_RESOLVED_GLR_OUTPUT_WITH_LOC],
 366 [[[3.0-3.5: +(z,q)
 367 5.0-5.3: <declare>(T,x)
 368 7.0-7.7: <init-declare>(T,x,y)
 369 9.0-9.5: =(x,y)
 370 11.0-11.9: +(<cast>(x,T),y)
 371 13.0-13.5: <declare>(T,x)
 372 15.0-15.13: <init-declare>(T,y,+(z,q))
 373 17.0-17.15: <error>
 374 19.0-19.5: +(z,q)
 375 ]]])
 376
 377 m4_define([_AT_AMBIG_GLR_OUTPUT],
 378 [[[+(z,q)
 379 <declare>(T,x)
 380 <init-declare>(T,x,y)
 381 =(x,y)
 382 +(<cast>(x,T),y)
 383 <OR>(<declare>(T,x),<cast>(x,T))
 384 <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
 385 <error>
 386 +(z,q)
 387 ]]])
 388
 389 m4_define([_AT_AMBIG_GLR_OUTPUT_WITH_LOC],
 390 [[[3.0-3.5: +(z,q)
 391 5.0-5.3: <declare>(T,x)
 392 7.0-7.7: <init-declare>(T,x,y)
 393 9.0-9.5: =(x,y)
 394 11.0-11.9: +(<cast>(x,T),y)
 395 13.0-13.5: <OR>(<declare>(T,x),<cast>(x,T))
 396 15.0-15.13: <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
 397 17.0-17.15: <error>
 398 19.0-19.5: +(z,q)
 399 ]]])
 400
 401 m4_define([_AT_GLR_STDERR],
 402 [[[syntax error
 403 ]]])
 404
 405 m4_define([_AT_VERBOSE_GLR_STDERR],
 406 [[[syntax error, unexpected ID, expecting '=' or '+' or ')'
 407 ]]])
 408
 409 ## ---------------------------------------------------- ##
 410 ## Compile the grammar described in the documentation.  ##
 411 ## ---------------------------------------------------- ##
 412
 413 AT_SETUP([GLR: Resolve ambiguity, impure, no locations])
 414 _AT_TEST_GLR_CXXTYPES([],
 415                       [%dprec 1], [%dprec 2])
 416 AT_PARSER_CHECK([[./types test-input]], 0,
 417                 _AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
 418 AT_CLEANUP
 419
 420 AT_SETUP([GLR: Resolve ambiguity, impure, locations])
 421 _AT_TEST_GLR_CXXTYPES([%locations],[%dprec 1],[%dprec 2])
 422 AT_PARSER_CHECK([[./types test-input]], 0,
 423                 _AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
 424 AT_CLEANUP
 425
 426 AT_SETUP([GLR: Resolve ambiguity, pure, no locations])
 427 _AT_TEST_GLR_CXXTYPES([%define api.pure],
 428                       [%dprec 1], [%dprec 2])
 429 AT_PARSER_CHECK([[./types test-input]], 0,
 430                 _AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
 431 AT_CLEANUP
 432
 433 AT_SETUP([GLR: Resolve ambiguity, pure, locations])
 434 _AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
 435                       [%dprec 1], [%dprec 2])
 436 AT_PARSER_CHECK([[./types test-input]], 0,
 437                 _AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
 438 AT_CLEANUP
 439
 440 AT_SETUP([GLR: Merge conflicting parses, impure, no locations])
 441 _AT_TEST_GLR_CXXTYPES([],
 442                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 443 AT_PARSER_CHECK([[./types test-input]], 0,
 444                 _AT_AMBIG_GLR_OUTPUT, _AT_GLR_STDERR)
 445 AT_CLEANUP
 446
 447 AT_SETUP([GLR: Merge conflicting parses, impure, locations])
 448 _AT_TEST_GLR_CXXTYPES([%locations],
 449                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 450 AT_PARSER_CHECK([[./types test-input]], 0,
 451                 _AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
 452 AT_CLEANUP
 453
 454 AT_SETUP([GLR: Merge conflicting parses, pure, no locations])
 455 _AT_TEST_GLR_CXXTYPES([%define api.pure],
 456                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 457 AT_PARSER_CHECK([[./types test-input]], 0,
 458                 _AT_AMBIG_GLR_OUTPUT, _AT_GLR_STDERR)
 459 AT_CLEANUP
 460 AT_SETUP([GLR: Merge conflicting parses, pure, locations])
 461 _AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
 462                       [%merge <stmtMerge>],[%merge <stmtMerge>])
 463 AT_PARSER_CHECK([[./types test-input]], 0,
 464                 _AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
 465 AT_CLEANUP
 466
 467 AT_SETUP([GLR: Verbose messages, resolve ambiguity, impure, no locations])
 468 _AT_TEST_GLR_CXXTYPES([%error-verbose],
 469                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 470 AT_PARSER_CHECK([[./types test-input]], 0,
 471                 _AT_AMBIG_GLR_OUTPUT, _AT_VERBOSE_GLR_STDERR)
 472 AT_CLEANUP