tests/cxx-type.at

   1 # Checking GLR Parsing.                         -*- Autotest -*-
   2
   3 # Copyright (C) 2002-2013 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 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 ';'        { $$ = new_nterm ("<error>", YY_NULLPTR, YY_NULLPTR, YY_NULLPTR); }
  98      | '@'              { YYACCEPT; }
  99      ;
 100
 101 expr : ID
 102      | TYPENAME '(' expr ')'
 103                         { $$ = new_nterm ("<cast>(%s,%s)", ]$[3, ]$[1, YY_NULLPTR); }
 104      | expr '+' expr    { $$ = new_nterm ("+(%s,%s)", ]$[1, ]$[3, YY_NULLPTR); }
 105      | expr '=' expr    { $$ = new_nterm ("=(%s,%s)", ]$[1, ]$[3, YY_NULLPTR); }
 106      ;
 107
 108 decl : TYPENAME declarator ';'
 109                         { $$ = new_nterm ("<declare>(%s,%s)", ]$[1, ]$[2, YY_NULLPTR); }
 110      | TYPENAME declarator '=' expr ';'
 111                         { $$ = 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 #include <assert.h>
 126
 127 int
 128 main (int argc, char **argv)
 129 {
 130   assert (argc == 2);
 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       assert (!feof (stdin));
 156       c = getchar ();
 157       switch (c)
 158         {
 159         case EOF:
 160           return 0;
 161         case '\t':
 162           colNum = (colNum + 7) & ~7;
 163           break;
 164         case ' ': case '\f':
 165           colNum += 1;
 166           break;
 167         case '\n':
 168           lineNum += 1;
 169           colNum = 0;
 170           break;
 171         default:
 172           {
 173             int tok;]AT_LOCATION_IF([[
 174             yylloc.first_line = yylloc.last_line = lineNum;
 175             yylloc.first_column = colNum;]])[
 176             if (isalpha (c))
 177               {
 178                 i = 0;
 179
 180                 do
 181                   {
 182                     buffer[i++] = c;
 183                     colNum += 1;
 184                     assert (i != sizeof buffer - 1);
 185                     c = getchar ();
 186                   }
 187                 while (isalnum (c) || c == '_');
 188
 189                 ungetc (c, stdin);
 190                 buffer[i++] = 0;
 191                 tok = isupper ((unsigned char) buffer[0]) ? TYPENAME : ID;
 192                 yylval = new_term (strcpy ((char *) malloc (i), buffer));
 193               }
 194             else
 195               {
 196                 colNum += 1;
 197                 tok = c;
 198                 yylval = YY_NULLPTR;
 199               }]AT_LOCATION_IF([[
 200             yylloc.last_column = colNum-1;]])[
 201             return tok;
 202           }
 203         }
 204     }
 205 }
 206
 207 static Node *
 208 new_nterm (char const *form, Node *child0, Node *child1, Node *child2)
 209 {
 210   Node *node = (Node *) malloc (sizeof (Node));
 211   node->nterm.isNterm = 1;
 212   node->nterm.parents = 0;
 213   node->nterm.form = form;
 214   node->nterm.children[0] = child0;
 215   if (child0)
 216     child0->nodeInfo.parents += 1;
 217   node->nterm.children[1] = child1;
 218   if (child1)
 219     child1->nodeInfo.parents += 1;
 220   node->nterm.children[2] = child2;
 221   if (child2)
 222     child2->nodeInfo.parents += 1;
 223   return node;
 224 }
 225
 226 static Node *
 227 new_term (char *text)
 228 {
 229   Node *node = (Node *) malloc (sizeof (Node));
 230   node->term.isNterm = 0;
 231   node->term.parents = 0;
 232   node->term.text = text;
 233   return node;
 234 }
 235
 236 static void
 237 free_node (Node *node)
 238 {
 239   if (!node)
 240     return;
 241   node->nodeInfo.parents -= 1;
 242   /* Free only if 0 (last parent) or -1 (no parents).  */
 243   if (node->nodeInfo.parents > 0)
 244     return;
 245   if (node->nodeInfo.isNterm == 1)
 246     {
 247       free_node (node->nterm.children[0]);
 248       free_node (node->nterm.children[1]);
 249       free_node (node->nterm.children[2]);
 250     }
 251   else
 252     free (node->term.text);
 253   free (node);
 254 }
 255
 256 static char *
 257 node_to_string (Node *node)
 258 {
 259   char *child0;
 260   char *child1;
 261   char *child2;
 262   char *buffer;
 263   if (!node)
 264     {
 265       buffer = (char *) malloc (1);
 266       buffer[0] = 0;
 267     }
 268   else if (node->nodeInfo.isNterm == 1)
 269     {
 270       child0 = node_to_string (node->nterm.children[0]);
 271       child1 = node_to_string (node->nterm.children[1]);
 272       child2 = node_to_string (node->nterm.children[2]);
 273       buffer = (char *) malloc (strlen (node->nterm.form) + strlen (child0)
 274                                 + strlen (child1) + strlen (child2) + 1);
 275       sprintf (buffer, node->nterm.form, child0, child1, child2);
 276       free (child0);
 277       free (child1);
 278       free (child2);
 279     }
 280   else
 281     buffer = strdup (node->term.text);
 282   return buffer;
 283 }
 284
 285 ]]
 286 m4_bmatch([$2], [stmtMerge],
 287 [[static YYSTYPE
 288 stmtMerge (YYSTYPE x0, YYSTYPE x1)
 289 {
 290   return new_nterm ("<OR>(%s,%s)", x0, x1, YY_NULLPTR);
 291 }
 292 ]])
 293 )
 294
 295 AT_DATA([test-input],
 296 [[
 297
 298 z + q;
 299
 300 T x;
 301
 302 T x = y;
 303
 304 x = y;
 305
 306 T (x) + y;
 307
 308 T (x);
 309
 310 T (y) = z + q;
 311
 312 T (y y) = z + q;
 313
 314 z + q;
 315
 316 @
 317
 318 This is total garbage, but it should be ignored.
 319 ]])
 320
 321 AT_BISON_CHECK([-o types.c types.y], 0, [], ignore)
 322 AT_COMPILE([types])
 323 AT_BISON_OPTION_POPDEFS
 324 ])
 325
 326 m4_define([_AT_RESOLVED_GLR_OUTPUT],
 327 [[+(z,q)
 328 <declare>(T,x)
 329 <init-declare>(T,x,y)
 330 =(x,y)
 331 +(<cast>(x,T),y)
 332 <declare>(T,x)
 333 <init-declare>(T,y,+(z,q))
 334 <error>
 335 +(z,q)
 336 ]])
 337
 338 m4_define([_AT_RESOLVED_GLR_OUTPUT_WITH_LOC],
 339 [[3.0-3.5: +(z,q)
 340 5.0-5.3: <declare>(T,x)
 341 7.0-7.7: <init-declare>(T,x,y)
 342 9.0-9.5: =(x,y)
 343 11.0-11.9: +(<cast>(x,T),y)
 344 13.0-13.5: <declare>(T,x)
 345 15.0-15.13: <init-declare>(T,y,+(z,q))
 346 17.0-17.15: <error>
 347 19.0-19.5: +(z,q)
 348 ]])
 349
 350 m4_define([_AT_AMBIG_GLR_OUTPUT],
 351 [[+(z,q)
 352 <declare>(T,x)
 353 <init-declare>(T,x,y)
 354 =(x,y)
 355 +(<cast>(x,T),y)
 356 <OR>(<declare>(T,x),<cast>(x,T))
 357 <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
 358 <error>
 359 +(z,q)
 360 ]])
 361
 362 m4_define([_AT_AMBIG_GLR_OUTPUT_WITH_LOC],
 363 [[3.0-3.5: +(z,q)
 364 5.0-5.3: <declare>(T,x)
 365 7.0-7.7: <init-declare>(T,x,y)
 366 9.0-9.5: =(x,y)
 367 11.0-11.9: +(<cast>(x,T),y)
 368 13.0-13.5: <OR>(<declare>(T,x),<cast>(x,T))
 369 15.0-15.13: <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
 370 17.0-17.15: <error>
 371 19.0-19.5: +(z,q)
 372 ]])
 373
 374 m4_define([_AT_GLR_STDERR],
 375 [[syntax error
 376 ]])
 377
 378 m4_define([_AT_GLR_STDERR_WITH_LOC],
 379 [[17.5: syntax error
 380 ]])
 381
 382 m4_define([_AT_VERBOSE_GLR_STDERR],
 383 [[syntax error, unexpected ID, expecting '=' or '+' or ')'
 384 ]])
 385
 386 m4_define([_AT_VERBOSE_GLR_STDERR_WITH_LOC],
 387 [[17.5: syntax error, unexpected ID, expecting '=' or '+' or ')'
 388 ]])
 389
 390 ## ---------------------------------------------------- ##
 391 ## Compile the grammar described in the documentation.  ##
 392 ## ---------------------------------------------------- ##
 393
 394 AT_SETUP([GLR: Resolve ambiguity, impure, no locations])
 395 _AT_TEST_GLR_CXXTYPES([],
 396                       [%dprec 1], [%dprec 2])
 397 AT_PARSER_CHECK([[./types test-input]], 0,
 398                 [_AT_RESOLVED_GLR_OUTPUT], [_AT_GLR_STDERR])
 399 AT_CLEANUP
 400
 401 AT_SETUP([GLR: Resolve ambiguity, impure, locations])
 402 _AT_TEST_GLR_CXXTYPES([%locations],[%dprec 1],[%dprec 2])
 403 AT_PARSER_CHECK([[./types test-input]], 0,
 404                 [_AT_RESOLVED_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 405 AT_CLEANUP
 406
 407 AT_SETUP([GLR: Resolve ambiguity, pure, no locations])
 408 _AT_TEST_GLR_CXXTYPES([%define api.pure],
 409                       [%dprec 1], [%dprec 2])
 410 AT_PARSER_CHECK([[./types test-input]], 0,
 411                 [_AT_RESOLVED_GLR_OUTPUT], [_AT_GLR_STDERR])
 412 AT_CLEANUP
 413
 414 AT_SETUP([GLR: Resolve ambiguity, pure, locations])
 415 _AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
 416                       [%dprec 1], [%dprec 2])
 417 AT_PARSER_CHECK([[./types test-input]], 0,
 418                 [_AT_RESOLVED_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 419 AT_CLEANUP
 420
 421 AT_SETUP([GLR: Merge conflicting parses, impure, no locations])
 422 _AT_TEST_GLR_CXXTYPES([],
 423                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 424 AT_PARSER_CHECK([[./types test-input]], 0,
 425                 [_AT_AMBIG_GLR_OUTPUT], [_AT_GLR_STDERR])
 426 AT_CLEANUP
 427
 428 AT_SETUP([GLR: Merge conflicting parses, impure, locations])
 429 _AT_TEST_GLR_CXXTYPES([%locations],
 430                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 431 AT_PARSER_CHECK([[./types test-input]], 0,
 432                 [_AT_AMBIG_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 433 AT_CLEANUP
 434
 435 AT_SETUP([GLR: Merge conflicting parses, pure, no locations])
 436 _AT_TEST_GLR_CXXTYPES([%define api.pure],
 437                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 438 AT_PARSER_CHECK([[./types test-input]], 0,
 439                 [_AT_AMBIG_GLR_OUTPUT], [_AT_GLR_STDERR])
 440 AT_CLEANUP
 441 AT_SETUP([GLR: Merge conflicting parses, pure, locations])
 442 _AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
 443                       [%merge <stmtMerge>],[%merge <stmtMerge>])
 444 AT_PARSER_CHECK([[./types test-input]], 0,
 445                 [_AT_AMBIG_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
 446 AT_CLEANUP
 447
 448 AT_SETUP([GLR: Verbose messages, resolve ambiguity, impure, no locations])
 449 _AT_TEST_GLR_CXXTYPES([%error-verbose],
 450                       [%merge <stmtMerge>], [%merge <stmtMerge>])
 451 AT_PARSER_CHECK([[./types test-input]], 0,
 452                 [_AT_AMBIG_GLR_OUTPUT], [_AT_VERBOSE_GLR_STDERR])
 453 AT_CLEANUP