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 [AT_BISON_OPTION_PUSHDEFS([%glr-parser $1])
  27
  28 AT_DATA_GRAMMAR([types.y],
  29 [[/* Simplified C++ Type and Expression Grammar.  */
  30
  31 $1
  32
  33 %code requires
  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   #define YYSTYPE Node *
  55 }
  56
  57 %code
  58 {
  59   static Node *new_nterm (char const *, Node *, Node *, Node *);
  60   static Node *new_term (char *);
  61   static void free_node (Node *);
  62   static char *node_to_string (Node *);
  63 ]m4_bmatch([$2], [stmtMerge],
  64 [ static YYSTYPE stmtMerge (YYSTYPE x0, YYSTYPE x1);])[
  65   #define YYINITDEPTH 10
  66   #define YYSTACKEXPANDABLE 1
  67   ]AT_YYERROR_DECLARE[
  68   ]AT_YYLEX_DECLARE[
  69 }
  70
  71 %token TYPENAME ID
  72
  73 %right '='
  74 %left '+'
  75
  76 %glr-parser
  77
  78 %destructor { free_node ($$); } stmt expr decl declarator TYPENAME ID
  79
  80 %%
  81
  82 prog :
  83      | prog stmt   {
  84                         char *output;]AT_LOCATION_IF([
  85                         printf ("%d.%d-%d.%d: ",
  86                              @2.first_line, @2.first_column,
  87                              @2.last_line, @2.last_column);])[
  88                         output = node_to_string (]$[2);
  89                         printf ("%s\n", output);
  90                         free (output);
  91                         free_node (]$[2);
  92                    }
  93      ;
  94
  95 stmt : expr ';'  $2     { $$ = ]$[1; }
  96      | decl      $3
  97      | error ';'        { $$ = new_nterm ("<error>", YY_NULL, YY_NULL, YY_NULL); }
  98      | '@'              { YYACCEPT; }
  99      ;
 100
 101 expr : ID
 102      | TYPENAME '(' expr ')'
 103                         { $$ = new_nterm ("<cast>(%s,%s)", ]$[3, ]$[1, YY_NULL); }
 104      | expr '+' expr    { $$ = new_nterm ("+(%s,%s)", ]$[1, ]$[3, YY_NULL); }
 105      | expr '=' expr    { $$ = new_nterm ("=(%s,%s)", ]$[1, ]$[3, YY_NULL); }
 106      ;
 107
 108 decl : TYPENAME declarator ';'
 109                         { $$ = new_nterm ("<declare>(%s,%s)", ]$[1, ]$[2, YY_NULL); }
 110      | TYPENAME declarator '=' expr ';'
 111                         { $$ = new_nterm ("<init-declare>(%s,%s,%s)", ]$[1,
 112                                           ]$[2, ]$[4); }
 113      ;
 114
 115 declarator : ID
 116      | '(' declarator ')' { $$ = ]$[2; }
 117      ;
 118
 119 %%
 120
 121 #include <ctype.h>
 122 #include <stdlib.h>
 123 #include <string.h>
 124 #include <stdarg.h>
 125
 126 int
 127 main (int argc, char **argv)
 128 {
 129   if (argc != 2)
 130     abort ();
 131   if (!freopen (argv[1], "r", stdin))
 132     return 3;
 133   return yyparse ();
 134 }
 135
 136 ]AT_YYERROR_DEFINE[
 137
 138 ]AT_YYLEX_PROTOTYPE[
 139 {
 140   char buffer[256];
 141   int c;
 142   unsigned int i;
 143   static int lineNum = 1;
 144   static int colNum = 0;
 145
 146 #if YYPURE
 147 # undef yylloc
 148 # define yylloc (*llocp)
 149 # undef yylval
 150 # define yylval (*lvalp)
 151 #endif
 152
 153   while (1)
 154     {
 155       if (feof (stdin))
 156         abort ();
 157       c = getchar ();
 158       switch (c)
 159         {
 160         case EOF:
 161           return 0;
 162         case '\t':
 163           colNum = (colNum + 7) & ~7;
 164           break;
 165         case ' ': case '\f':
 166           colNum += 1;
 167           break;
 168         case '\n':
 169           lineNum += 1;
 170           colNum = 0;
 171           break;
 172         default:
 173           {
 174             int tok;]AT_LOCATION_IF([[
 175             yylloc.first_line = yylloc.last_line = lineNum;
 176             yylloc.first_column = colNum;]])[
 177             if (isalpha (c))
 178               {
 179                 i = 0;
 180
 181                 do
 182                   {
 183                     buffer[i++] = c;
 184                     colNum += 1;
 185                     if (i == sizeof buffer - 1)
 186                       abort ();
 187                     c = getchar ();
 188                   }
 189                 while (isalnum (c) || c == '_');
 190
 191                 ungetc (c, stdin);
 192                 buffer[i++] = 0;
 193                 tok = isupper ((unsigned char) buffer[0]) ? TYPENAME : ID;
 194                 yylval = new_term (strcpy ((char *) malloc (i), buffer));
 195               }
 196             else
 197               {
 198                 colNum += 1;
 199                 tok = c;
 200                 yylval = YY_NULL;
 201               }]AT_LOCATION_IF([[
 202             yylloc.last_column = colNum-1;]])[
 203             return tok;
 204           }
 205         }
 206     }
 207 }
 208
 209 static Node *
 210 new_nterm (char const *form, Node *child0, Node *child1, Node *child2)
 211 {
 212   Node *node = (Node *) malloc (sizeof (Node));
 213   node->nterm.isNterm = 1;
 214   node->nterm.parents = 0;
 215   node->nterm.form = form;
 216   node->nterm.children[0] = child0;
 217   if (child0)
 218     child0->nodeInfo.parents += 1;
 219   node->nterm.children[1] = child1;
 220   if (child1)
 221     child1->nodeInfo.parents += 1;
 222   node->nterm.children[2] = child2;
 223   if (child2)
 224     child2->nodeInfo.parents += 1;
 225   return node;
 226 }
 227
 228 static Node *
 229 new_term (char *text)
 230 {
 231   Node *node = (Node *) malloc (sizeof (Node));
 232   node->term.isNterm = 0;
 233   node->term.parents = 0;
 234   node->term.text = text;
 235   return node;
 236 }
 237
 238 static void
 239 free_node (Node *node)
 240 {
 241   if (!node)
 242     return;
 243   node->nodeInfo.parents -= 1;
 244   /* Free only if 0 (last parent) or -1 (no parents).  */
 245   if (node->nodeInfo.parents > 0)
 246     return;
 247   if (node->nodeInfo.isNterm == 1)
 248     {
 249       free_node (node->nterm.children[0]);
 250       free_node (node->nterm.children[1]);
 251       free_node (node->nterm.children[2]);
 252     }
 253   else
 254     free (node->term.text);
 255   free (node);
 256 }
 257
 258 static char *
 259 node_to_string (Node *node)
 260 {
 261   char *child0;
 262   char *child1;
 263   char *child2;
 264   char *buffer;
 265   if (!node)
 266     {
 267       buffer = (char *) malloc (1);
 268       buffer[0] = 0;
 269     }
 270   else if (node->nodeInfo.isNterm == 1)
 271     {
 272       child0 = node_to_string (node->nterm.children[0]);
 273       child1 = node_to_string (node->nterm.children[1]);
 274       child2 = node_to_string (node->nterm.children[2]);
 275       buffer = (char *) malloc (strlen (node->nterm.form) + strlen (child0)
 276                                 + strlen (child1) + strlen (child2) + 1);
 277       sprintf (buffer, node->nterm.form, child0, child1, child2);
 278       free (child0);
 279       free (child1);
 280       free (child2);
 281     }
 282   else
 283     buffer = strdup (node->term.text);
 284   return buffer;
 285 }
 286
 287 ]]
 288 m4_bmatch([$2], [stmtMerge],
 289 [[static YYSTYPE
 290 stmtMerge (YYSTYPE x0, YYSTYPE x1)
 291 {
 292   return new_nterm ("<OR>(%s,%s)", x0, x1, YY_NULL);
 293 }
 294 ]])
 295 )
 296
 297 AT_DATA([test-input],
 298 [[
 299
 300 z + q;
 301
 302 T x;
 303
 304 T x = y;
 305
 306 x = y;
 307
 308 T (x) + y;
 309
 310 T (x);
 311
 312 T (y) = z + q;
 313
 314 T (y y) = z + q;
 315
 316 z + q;
 317
 318 @
 319
 320 This is total garbage, but it should be ignored.
 321 ]])
 322
 323 AT_BISON_CHECK([-o types.c types.y], 0, [], ignore)
 324 AT_COMPILE([types])
 325 AT_BISON_OPTION_POPDEFS
 326 ])
 327
 328 m4_define([_AT_RESOLVED_GLR_OUTPUT],
 329 [[+(z,q)
 330 <declare>(T,x)
 331 <init-declare>(T,x,y)
 332 =(x,y)
 333 +(<cast>(x,T),y)
 334 <declare>(T,x)
 335 <init-declare>(T,y,+(z,q))
 336 <error>
 337 +(z,q)
 338 ]])
 339
 340 m4_define([_AT_RESOLVED_GLR_OUTPUT_WITH_LOC],
 341 [[3.0-3.5: +(z,q)
 342 5.0-5.3: <declare>(T,x)
 343 7.0-7.7: <init-declare>(T,x,y)
 344 9.0-9.5: =(x,y)
 345 11.0-11.9: +(<cast>(x,T),y)
 346 13.0-13.5: <declare>(T,x)
 347 15.0-15.13: <init-declare>(T,y,+(z,q))
 348 17.0-17.15: <error>
 349 19.0-19.5: +(z,q)
 350 ]])
 351
 352 m4_define([_AT_AMBIG_GLR_OUTPUT],
 353 [[+(z,q)
 354 <declare>(T,x)
 355 <init-declare>(T,x,y)
 356 =(x,y)
 357 +(<cast>(x,T),y)
 358 <OR>(<declare>(T,x),<cast>(x,T))
 359 <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
 360 <error>
 361 +(z,q)
 362 ]])
 363
 364 m4_define([_AT_AMBIG_GLR_OUTPUT_WITH_LOC],
 365 [[3.0-3.5: +(z,q)
 366 5.0-5.3: <declare>(T,x)
 367 7.0-7.7: <init-declare>(T,x,y)
 368 9.0-9.5: =(x,y)
 369 11.0-11.9: +(<cast>(x,T),y)
 370 13.0-13.5: <OR>(<declare>(T,x),<cast>(x,T))
 371 15.0-15.13: <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
 372 17.0-17.15: <error>
 373 19.0-19.5: +(z,q)
 374 ]])
 375
 376 m4_define([_AT_GLR_STDERR],
 377 [[syntax error
 378 ]])
 379
 380 m4_define([_AT_GLR_STDERR_WITH_LOC],
 381 [[17.5-4: syntax error
 382 ]])
 383
 384 m4_define([_AT_VERBOSE_GLR_STDERR],
 385 [[syntax error, unexpected ID, expecting '=' or '+' or ')'
 386 ]])
 387
 388 m4_define([_AT_VERBOSE_GLR_STDERR_WITH_LOC],
 389 [[17.5-4: syntax error, unexpected ID, expecting '=' or '+' or ')'
 390 ]])
 391
 392 ## ---------------------------------------------------- ##
 393 ## Compile the grammar described in the documentation.  ##
 394 ## ---------------------------------------------------- ##
 395
 396 AT_SETUP([GLR: Resolve ambiguity, impure, no locations])
 397 _AT_TEST_GLR_CXXTYPES([],
 398                       [%dprec 1], [%dprec 2])
 399 AT_PARSER_CHECK([[./types test-input]], 0,
 400                 [_AT_RESOLVED_GLR_OUTPUT], [_AT_GLR_STDERR])
 401 AT_CLEANUP
 402
 403 AT_SETUP([GLR: Resolve ambiguity, impure, locations])
 404 _AT_TEST_GLR_CXXTYPES([%locations],[%dprec 1],[%dprec 2])
 405 AT_PARSER_CHECK([[./types test-input]], 0,
 406                 [_AT_RESOLVED_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 407 AT_CLEANUP
 408
 409 AT_SETUP([GLR: Resolve ambiguity, pure, no locations])
 410 _AT_TEST_GLR_CXXTYPES([%define api.pure],
 411                       [%dprec 1], [%dprec 2])
 412 AT_PARSER_CHECK([[./types test-input]], 0,
 413                 [_AT_RESOLVED_GLR_OUTPUT], [_AT_GLR_STDERR])
 414 AT_CLEANUP
 415
 416 AT_SETUP([GLR: Resolve ambiguity, pure, locations])
 417 _AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
 418                       [%dprec 1], [%dprec 2])
 419 AT_PARSER_CHECK([[./types test-input]], 0,
 420                 [_AT_RESOLVED_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 421 AT_CLEANUP
 422
 423 AT_SETUP([GLR: Merge conflicting parses, impure, no locations])
 424 _AT_TEST_GLR_CXXTYPES([],
 425                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 426 AT_PARSER_CHECK([[./types test-input]], 0,
 427                 [_AT_AMBIG_GLR_OUTPUT], [_AT_GLR_STDERR])
 428 AT_CLEANUP
 429
 430 AT_SETUP([GLR: Merge conflicting parses, impure, locations])
 431 _AT_TEST_GLR_CXXTYPES([%locations],
 432                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 433 AT_PARSER_CHECK([[./types test-input]], 0,
 434                 [_AT_AMBIG_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 435 AT_CLEANUP
 436
 437 AT_SETUP([GLR: Merge conflicting parses, pure, no locations])
 438 _AT_TEST_GLR_CXXTYPES([%define api.pure],
 439                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 440 AT_PARSER_CHECK([[./types test-input]], 0,
 441                 [_AT_AMBIG_GLR_OUTPUT], [_AT_GLR_STDERR])
 442 AT_CLEANUP
 443 AT_SETUP([GLR: Merge conflicting parses, pure, locations])
 444 _AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
 445                       [%merge <stmtMerge>],[%merge <stmtMerge>])
 446 AT_PARSER_CHECK([[./types test-input]], 0,
 447                 [_AT_AMBIG_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 448 AT_CLEANUP
 449
 450 AT_SETUP([GLR: Verbose messages, resolve ambiguity, impure, no locations])
 451 _AT_TEST_GLR_CXXTYPES([%error-verbose],
 452                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 453 AT_PARSER_CHECK([[./types test-input]], 0,
 454                 [_AT_AMBIG_GLR_OUTPUT], [_AT_VERBOSE_GLR_STDERR])
 455 AT_CLEANUP