nsz Git - cparser/blob - type.c

   1 #include <config.h>
   2
   3 #include <stdio.h>
   4 #include <assert.h>
   5 #include "type_t.h"
   6 #include "type_hash.h"
   7 #include "adt/error.h"
   8
   9 static struct obstack   _type_obst;
  10 struct obstack         *type_obst = &_type_obst;
  11 static FILE            *out;
  12 static int              type_visited = 0;
  13
  14 static void intern_print_type_pre(type_t *type, bool top);
  15 static void intern_print_type_post(type_t *type, bool top);
  16
  17 void init_types(void)
  18 {
  19         obstack_init(type_obst);
  20 }
  21
  22 void exit_types(void)
  23 {
  24         obstack_free(type_obst, NULL);
  25 }
  26
  27 void type_set_output(FILE *stream)
  28 {
  29         out = stream;
  30 }
  31
  32 void inc_type_visited(void)
  33 {
  34         type_visited++;
  35 }
  36
  37 void print_type_qualifiers(type_qualifiers_t qualifiers)
  38 {
  39         if(qualifiers & TYPE_QUALIFIER_CONST)    fputs("const ",    out);
  40         if(qualifiers & TYPE_QUALIFIER_VOLATILE) fputs("volatile ", out);
  41         if(qualifiers & TYPE_QUALIFIER_RESTRICT) fputs("restrict ", out);
  42 }
  43
  44 static
  45 void print_atomic_type(const atomic_type_t *type)
  46 {
  47         print_type_qualifiers(type->type.qualifiers);
  48
  49         const char *s;
  50         switch(type->atype) {
  51         case ATOMIC_TYPE_INVALID:     s = "INVALIDATOMIC";      break;
  52         case ATOMIC_TYPE_VOID:        s = "void";               break;
  53         case ATOMIC_TYPE_BOOL:        s = "_Bool";              break;
  54         case ATOMIC_TYPE_CHAR:        s = "char";               break;
  55         case ATOMIC_TYPE_SCHAR:       s = "signed char";        break;
  56         case ATOMIC_TYPE_UCHAR:       s = "unsigned char";      break;
  57         case ATOMIC_TYPE_INT:         s = "int";                break;
  58         case ATOMIC_TYPE_UINT:        s = "unsigned int";       break;
  59         case ATOMIC_TYPE_SHORT:       s = "short";              break;
  60         case ATOMIC_TYPE_USHORT:      s = "unsigned short";     break;
  61         case ATOMIC_TYPE_LONG:        s = "long";               break;
  62         case ATOMIC_TYPE_ULONG:       s = "unsigned long";      break;
  63         case ATOMIC_TYPE_LONGLONG:    s = "long long";          break;
  64         case ATOMIC_TYPE_ULONGLONG:   s = "unsigned long long"; break;
  65         case ATOMIC_TYPE_LONG_DOUBLE: s = "long double";        break;
  66         case ATOMIC_TYPE_FLOAT:       s = "float";              break;
  67         case ATOMIC_TYPE_DOUBLE:      s = "double";             break;
  68         default:                      s = "UNKNOWNATOMIC";      break;
  69         }
  70         fputs(s, out);
  71 }
  72
  73 static void print_function_type_pre(const function_type_t *type, bool top)
  74 {
  75         print_type_qualifiers(type->type.qualifiers);
  76
  77         intern_print_type_pre(type->return_type, false);
  78
  79         /* don't emit braces if we're the toplevel type... */
  80         if(!top)
  81                 fputc('(', out);
  82 }
  83
  84 static void print_function_type_post(const function_type_t *type,
  85                                      const context_t *context, bool top)
  86 {
  87         intern_print_type_post(type->return_type, false);
  88         /* don't emit braces if we're the toplevel type... */
  89         if(!top)
  90                 fputc(')', out);
  91
  92         fputc('(', out);
  93
  94         int                 first     = 1;
  95         if(context == NULL) {
  96                 function_parameter_t *parameter = type->parameters;
  97                 for( ; parameter != NULL; parameter = parameter->next) {
  98                         if(first) {
  99                                 first = 0;
 100                         } else {
 101                                 fputs(", ", out);
 102                         }
 103                         print_type(parameter->type);
 104                 }
 105         } else {
 106                 declaration_t *parameter = context->declarations;
 107                 for( ; parameter != NULL; parameter = parameter->next) {
 108                         if(first) {
 109                                 first = 0;
 110                         } else {
 111                                 fputs(", ", out);
 112                         }
 113                         print_type_ext(parameter->type, parameter->symbol,
 114                                        &parameter->context);
 115                 }
 116         }
 117         if(type->variadic) {
 118                 if(first) {
 119                         first = 0;
 120                 } else {
 121                         fputs(", ", out);
 122                 }
 123                 fputs("...", out);
 124         }
 125         if(first && !type->unspecified_parameters) {
 126                 fputs("void", out);
 127         }
 128         fputc(')', out);
 129 }
 130
 131 static void print_pointer_type_pre(const pointer_type_t *type)
 132 {
 133         intern_print_type_pre(type->points_to, false);
 134         fputs("*", out);
 135         print_type_qualifiers(type->type.qualifiers);
 136 }
 137
 138 static void print_pointer_type_post(const pointer_type_t *type)
 139 {
 140         intern_print_type_post(type->points_to, false);
 141 }
 142
 143 static void print_array_type_pre(const array_type_t *type)
 144 {
 145         intern_print_type_pre(type->element_type, false);
 146 }
 147
 148 static void print_array_type_post(const array_type_t *type)
 149 {
 150         fputc('[', out);
 151         if(type->is_static) {
 152                 fputs("static ", out);
 153         }
 154         print_type_qualifiers(type->type.qualifiers);
 155         if(type->size != NULL) {
 156                 print_expression(type->size);
 157         }
 158         fputc(']', out);
 159         intern_print_type_post(type->element_type, false);
 160 }
 161
 162 void print_enum_definition(const declaration_t *declaration)
 163 {
 164         fputs("{\n", out);
 165
 166         change_indent(1);
 167
 168         declaration_t *entry = declaration->next;
 169         for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
 170                entry = entry->next) {
 171
 172                 print_indent();
 173                 fprintf(out, "%s", entry->symbol->string);
 174                 if(entry->init.initializer != NULL) {
 175                         fprintf(out, " = ");
 176                         print_expression(entry->init.enum_value);
 177                 }
 178                 fprintf(out, ",\n");
 179         }
 180
 181         change_indent(-1);
 182         print_indent();
 183         fputs("}", out);
 184 }
 185
 186 static void print_type_enum(const enum_type_t *type)
 187 {
 188         print_type_qualifiers(type->type.qualifiers);
 189         fputs("enum ", out);
 190
 191         declaration_t *declaration = type->declaration;
 192         symbol_t      *symbol      = declaration->symbol;
 193         if(symbol != NULL) {
 194                 fputs(symbol->string, out);
 195         } else {
 196                 print_enum_definition(declaration);
 197         }
 198 }
 199
 200 void print_compound_definition(const declaration_t *declaration)
 201 {
 202         fputs("{\n", out);
 203         change_indent(1);
 204
 205         declaration_t *iter = declaration->context.declarations;
 206         for( ; iter != NULL; iter = iter->next) {
 207                 print_indent();
 208                 print_declaration(iter);
 209                 fputc('\n', out);
 210         }
 211
 212         change_indent(-1);
 213         print_indent();
 214         fputs("}", out);
 215 }
 216
 217 static void print_compound_type(const compound_type_t *type)
 218 {
 219         print_type_qualifiers(type->type.qualifiers);
 220
 221         if(type->type.type == TYPE_COMPOUND_STRUCT) {
 222                 fputs("struct ", out);
 223         } else {
 224                 assert(type->type.type == TYPE_COMPOUND_UNION);
 225                 fputs("union ", out);
 226         }
 227
 228         declaration_t *declaration = type->declaration;
 229         symbol_t      *symbol      = declaration->symbol;
 230         if(symbol != NULL) {
 231                 fputs(symbol->string, out);
 232         } else {
 233                 print_compound_definition(declaration);
 234         }
 235 }
 236
 237 static void print_typedef_type_pre(typedef_type_t *type)
 238 {
 239         fputs(type->declaration->symbol->string, out);
 240 }
 241
 242 static void print_typeof_type_pre(typeof_type_t *type)
 243 {
 244         fputs("typeof(", out);
 245         if(type->expression != NULL) {
 246                 assert(type->typeof_type == NULL);
 247                 print_expression(type->expression);
 248         } else {
 249                 print_type(type->typeof_type);
 250         }
 251         fputc(')', out);
 252 }
 253
 254 static void intern_print_type_pre(type_t *type, bool top)
 255 {
 256         switch(type->type) {
 257         case TYPE_INVALID:
 258                 fputs("invalid", out);
 259                 return;
 260         case TYPE_ENUM:
 261                 print_type_enum(&type->enumt);
 262                 return;
 263         case TYPE_ATOMIC:
 264                 print_atomic_type(&type->atomic);
 265                 return;
 266         case TYPE_COMPOUND_STRUCT:
 267         case TYPE_COMPOUND_UNION:
 268                 print_compound_type(&type->compound);
 269                 return;
 270         case TYPE_BUILTIN:
 271                 fputs(type->builtin.symbol->string, out);
 272                 return;
 273         case TYPE_FUNCTION:
 274                 print_function_type_pre(&type->function, top);
 275                 return;
 276         case TYPE_POINTER:
 277                 print_pointer_type_pre(&type->pointer);
 278                 return;
 279         case TYPE_ARRAY:
 280                 print_array_type_pre(&type->array);
 281                 return;
 282         case TYPE_TYPEDEF:
 283                 print_typedef_type_pre(&type->typedeft);
 284                 return;
 285         case TYPE_TYPEOF:
 286                 print_typeof_type_pre(&type->typeoft);
 287                 return;
 288         }
 289         fputs("unknown", out);
 290 }
 291
 292 static void intern_print_type_post(type_t *type, bool top)
 293 {
 294         switch(type->type) {
 295         case TYPE_FUNCTION:
 296                 print_function_type_post(&type->function, NULL, top);
 297                 return;
 298         case TYPE_POINTER:
 299                 print_pointer_type_post(&type->pointer);
 300                 return;
 301         case TYPE_ARRAY:
 302                 print_array_type_post(&type->array);
 303                 return;
 304         case TYPE_INVALID:
 305         case TYPE_ATOMIC:
 306         case TYPE_ENUM:
 307         case TYPE_COMPOUND_STRUCT:
 308         case TYPE_COMPOUND_UNION:
 309         case TYPE_BUILTIN:
 310         case TYPE_TYPEOF:
 311         case TYPE_TYPEDEF:
 312                 break;
 313         }
 314 }
 315
 316 void print_type(type_t *type)
 317 {
 318         print_type_ext(type, NULL, NULL);
 319 }
 320
 321 void print_type_ext(type_t *type, const symbol_t *symbol,
 322                     const context_t *context)
 323 {
 324         if(type == NULL) {
 325                 fputs("nil type", out);
 326                 return;
 327         }
 328
 329         intern_print_type_pre(type, true);
 330         if(symbol != NULL) {
 331                 fputc(' ', out);
 332                 fputs(symbol->string, out);
 333         }
 334         if(type->type == TYPE_FUNCTION) {
 335                 print_function_type_post(&type->function, context, true);
 336         } else {
 337                 intern_print_type_post(type, true);
 338         }
 339 }
 340
 341 static size_t get_type_size(type_t *type)
 342 {
 343         switch(type->type) {
 344         case TYPE_ATOMIC:          return sizeof(atomic_type_t);
 345         case TYPE_COMPOUND_STRUCT:
 346         case TYPE_COMPOUND_UNION:  return sizeof(compound_type_t);
 347         case TYPE_ENUM:            return sizeof(enum_type_t);
 348         case TYPE_FUNCTION:        return sizeof(function_type_t);
 349         case TYPE_POINTER:         return sizeof(pointer_type_t);
 350         case TYPE_ARRAY:           return sizeof(array_type_t);
 351         case TYPE_BUILTIN:         return sizeof(builtin_type_t);
 352         case TYPE_TYPEDEF:         return sizeof(typedef_type_t);
 353         case TYPE_TYPEOF:          return sizeof(typeof_type_t);
 354         case TYPE_INVALID:         panic("invalid type found");
 355         }
 356         panic("unknown type found");
 357 }
 358
 359 /**
 360  * duplicates a type
 361  * note that this does not produce a deep copy!
 362  */
 363 type_t *duplicate_type(type_t *type)
 364 {
 365         size_t size = get_type_size(type);
 366
 367         type_t *copy = obstack_alloc(type_obst, size);
 368         memcpy(copy, type, size);
 369
 370         return copy;
 371 }
 372
 373 type_t *get_unqualified_type(type_t *type)
 374 {
 375         if(type->base.qualifiers == TYPE_QUALIFIER_NONE)
 376                 return type;
 377
 378         type_t *unqualified_type          = duplicate_type(type);
 379         unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
 380
 381         type_t *result = typehash_insert(unqualified_type);
 382         if(result != unqualified_type) {
 383                 obstack_free(type_obst, unqualified_type);
 384         }
 385
 386         return result;
 387 }
 388
 389 bool type_valid(const type_t *type)
 390 {
 391         return type->type != TYPE_INVALID;
 392 }
 393
 394 bool is_type_integer(const type_t *type)
 395 {
 396         assert(!is_typeref(type));
 397
 398         if(type->type == TYPE_ENUM)
 399                 return true;
 400
 401         if(type->type != TYPE_ATOMIC)
 402                 return false;
 403
 404         switch(type->atomic.atype) {
 405         case ATOMIC_TYPE_BOOL:
 406         case ATOMIC_TYPE_CHAR:
 407         case ATOMIC_TYPE_SCHAR:
 408         case ATOMIC_TYPE_UCHAR:
 409         case ATOMIC_TYPE_SHORT:
 410         case ATOMIC_TYPE_USHORT:
 411         case ATOMIC_TYPE_INT:
 412         case ATOMIC_TYPE_UINT:
 413         case ATOMIC_TYPE_LONG:
 414         case ATOMIC_TYPE_ULONG:
 415         case ATOMIC_TYPE_LONGLONG:
 416         case ATOMIC_TYPE_ULONGLONG:
 417                 return true;
 418         default:
 419                 return false;
 420         }
 421 }
 422
 423 bool is_type_floating(const type_t *type)
 424 {
 425         assert(!is_typeref(type));
 426
 427         if(type->type != TYPE_ATOMIC)
 428                 return false;
 429
 430         switch(type->atomic.atype) {
 431         case ATOMIC_TYPE_FLOAT:
 432         case ATOMIC_TYPE_DOUBLE:
 433         case ATOMIC_TYPE_LONG_DOUBLE:
 434 #ifdef PROVIDE_COMPLEX
 435         case ATOMIC_TYPE_FLOAT_COMPLEX:
 436         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 437         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 438         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 439         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 440         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 441 #endif
 442                 return true;
 443         default:
 444                 return false;
 445         }
 446 }
 447
 448 bool is_type_signed(const type_t *type)
 449 {
 450         assert(!is_typeref(type));
 451
 452         /* enum types are int for now */
 453         if(type->type == TYPE_ENUM)
 454                 return true;
 455
 456         if(type->type != TYPE_ATOMIC)
 457                 return false;
 458
 459         switch(type->atomic.atype) {
 460         case ATOMIC_TYPE_CHAR:
 461         case ATOMIC_TYPE_SCHAR:
 462         case ATOMIC_TYPE_SHORT:
 463         case ATOMIC_TYPE_INT:
 464         case ATOMIC_TYPE_LONG:
 465         case ATOMIC_TYPE_LONGLONG:
 466         case ATOMIC_TYPE_FLOAT:
 467         case ATOMIC_TYPE_DOUBLE:
 468         case ATOMIC_TYPE_LONG_DOUBLE:
 469 #ifdef PROVIDE_COMPLEX
 470         case ATOMIC_TYPE_FLOAT_COMPLEX:
 471         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 472         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 473         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 474         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 475         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 476 #endif
 477                 return true;
 478
 479         case ATOMIC_TYPE_BOOL:
 480         case ATOMIC_TYPE_UCHAR:
 481         case ATOMIC_TYPE_USHORT:
 482         case ATOMIC_TYPE_UINT:
 483         case ATOMIC_TYPE_ULONG:
 484         case ATOMIC_TYPE_ULONGLONG:
 485                 return false;
 486
 487         case ATOMIC_TYPE_VOID:
 488         case ATOMIC_TYPE_INVALID:
 489         case ATOMIC_TYPE_LAST:
 490                 return false;
 491         }
 492
 493         panic("invalid atomic type found");
 494         return false;
 495 }
 496
 497 bool is_type_arithmetic(const type_t *type)
 498 {
 499         assert(!is_typeref(type));
 500
 501         if(is_type_integer(type) || is_type_floating(type))
 502                 return true;
 503
 504         return false;
 505 }
 506
 507 bool is_type_scalar(const type_t *type)
 508 {
 509         assert(!is_typeref(type));
 510
 511         switch (type->type) {
 512                 case TYPE_POINTER: return true;
 513                 case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
 514                 default:           break;
 515         }
 516
 517         return is_type_arithmetic(type);
 518 }
 519
 520 bool is_type_incomplete(const type_t *type)
 521 {
 522         assert(!is_typeref(type));
 523
 524         switch(type->type) {
 525         case TYPE_COMPOUND_STRUCT:
 526         case TYPE_COMPOUND_UNION: {
 527                 const compound_type_t *compound_type = &type->compound;
 528                 declaration_t         *declaration   = compound_type->declaration;
 529                 return !declaration->init.is_defined;
 530         }
 531         case TYPE_FUNCTION:
 532                 return true;
 533
 534         case TYPE_ARRAY:
 535                 return type->array.size == NULL;
 536
 537         case TYPE_ATOMIC:
 538         case TYPE_POINTER:
 539         case TYPE_ENUM:
 540         case TYPE_BUILTIN:
 541                 return false;
 542
 543         case TYPE_TYPEDEF:
 544         case TYPE_TYPEOF:
 545                 panic("is_type_incomplete called without typerefs skipped");
 546         case TYPE_INVALID:
 547                 break;
 548         }
 549
 550         panic("invalid type found");
 551 }
 552
 553 static bool function_types_compatible(const function_type_t *func1,
 554                                       const function_type_t *func2)
 555 {
 556         if(!types_compatible(func1->return_type, func2->return_type))
 557                 return false;
 558
 559         /* can parameters be compared? */
 560         if(func1->unspecified_parameters || func2->unspecified_parameters)
 561                 return true;
 562
 563         if(func1->variadic != func2->variadic)
 564                 return false;
 565
 566         /* TODO: handling of unspecified parameters not correct yet */
 567
 568         /* all argument types must be compatible */
 569         function_parameter_t *parameter1 = func1->parameters;
 570         function_parameter_t *parameter2 = func2->parameters;
 571         for( ; parameter1 != NULL && parameter2 != NULL;
 572                         parameter1 = parameter1->next, parameter2 = parameter2->next) {
 573                 type_t *parameter1_type = skip_typeref(parameter1->type);
 574                 type_t *parameter2_type = skip_typeref(parameter2->type);
 575
 576                 parameter1_type = get_unqualified_type(parameter1_type);
 577                 parameter2_type = get_unqualified_type(parameter2_type);
 578
 579                 if(!types_compatible(parameter1_type, parameter2_type))
 580                         return false;
 581         }
 582         /* same number of arguments? */
 583         if(parameter1 != NULL || parameter2 != NULL)
 584                 return false;
 585
 586         return true;
 587 }
 588
 589 static bool array_types_compatible(const array_type_t *array1,
 590                                    const array_type_t *array2)
 591 {
 592         type_t *element_type1 = skip_typeref(array1->element_type);
 593         type_t *element_type2 = skip_typeref(array2->element_type);
 594         if(!types_compatible(element_type1, element_type2))
 595                 return false;
 596
 597         if(array1->size != NULL && array2->size != NULL) {
 598                 /* TODO: check if size expression evaulate to the same value
 599                  * if they are constant */
 600         }
 601
 602         return true;
 603 }
 604
 605 bool types_compatible(const type_t *type1, const type_t *type2)
 606 {
 607         assert(!is_typeref(type1));
 608         assert(!is_typeref(type2));
 609
 610         /* shortcut: the same type is always compatible */
 611         if(type1 == type2)
 612                 return true;
 613
 614         if(type1->base.qualifiers != type2->base.qualifiers)
 615                 return false;
 616         if(type1->type != type2->type)
 617                 return false;
 618
 619         switch(type1->type) {
 620         case TYPE_FUNCTION:
 621                 return function_types_compatible(&type1->function, &type2->function);
 622         case TYPE_ATOMIC:
 623                 return type1->atomic.atype == type2->atomic.atype;
 624         case TYPE_ARRAY:
 625                 return array_types_compatible(&type1->array, &type2->array);
 626         case TYPE_POINTER:
 627                 return types_compatible(type1->pointer.points_to,
 628                                         type2->pointer.points_to);
 629         case TYPE_COMPOUND_STRUCT:
 630         case TYPE_COMPOUND_UNION:
 631         case TYPE_ENUM:
 632         case TYPE_BUILTIN:
 633                 /* TODO: not implemented */
 634                 break;
 635
 636         case TYPE_INVALID:
 637                 panic("invalid type found in compatible types");
 638         case TYPE_TYPEDEF:
 639         case TYPE_TYPEOF:
 640                 panic("typerefs not skipped in compatible types?!?");
 641         }
 642
 643         /* TODO: incomplete */
 644         return false;
 645 }
 646
 647 bool pointers_compatible(const type_t *type1, const type_t *type2)
 648 {
 649         assert(!is_typeref(type1));
 650         assert(!is_typeref(type2));
 651
 652         assert(type1->type == TYPE_POINTER);
 653         assert(type2->type == TYPE_POINTER);
 654         /* TODO */
 655         return true;
 656 }
 657
 658 type_t *skip_typeref(type_t *type)
 659 {
 660         unsigned qualifiers = type->base.qualifiers;
 661
 662         while(1) {
 663                 switch(type->type) {
 664                 case TYPE_TYPEDEF: {
 665                         qualifiers |= type->base.qualifiers;
 666                         const typedef_type_t *typedef_type = &type->typedeft;
 667                         if(typedef_type->resolved_type != NULL) {
 668                                 type = typedef_type->resolved_type;
 669                                 break;
 670                         }
 671                         type = typedef_type->declaration->type;
 672                         continue;
 673                 }
 674                 case TYPE_TYPEOF: {
 675                         const typeof_type_t *typeof_type = &type->typeoft;
 676                         if(typeof_type->typeof_type != NULL) {
 677                                 type = typeof_type->typeof_type;
 678                         } else {
 679                                 type = typeof_type->expression->base.datatype;
 680                         }
 681                         continue;
 682                 }
 683                 default:
 684                         break;
 685                 }
 686                 break;
 687         }
 688
 689         return type;
 690 }
 691
 692
 693
 694 static type_t *identify_new_type(type_t *type)
 695 {
 696         type_t *result = typehash_insert(type);
 697         if(result != type) {
 698                 obstack_free(type_obst, type);
 699         }
 700         return result;
 701 }
 702
 703 type_t *make_atomic_type(atomic_type_type_t atype, type_qualifiers_t qualifiers)
 704 {
 705         type_t *type = obstack_alloc(type_obst, sizeof(atomic_type_t));
 706         memset(type, 0, sizeof(atomic_type_t));
 707
 708         type->type            = TYPE_ATOMIC;
 709         type->base.qualifiers = qualifiers;
 710         type->atomic.atype    = atype;
 711
 712         return identify_new_type(type);
 713 }
 714
 715 type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
 716 {
 717         type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
 718         memset(type, 0, sizeof(pointer_type_t));
 719
 720         type->type              = TYPE_POINTER;
 721         type->base.qualifiers   = qualifiers;
 722         type->pointer.points_to = points_to;
 723
 724         return identify_new_type(type);
 725 }
 726
 727 static __attribute__((unused))
 728 void dbg_type(type_t *type)
 729 {
 730         FILE *old_out = out;
 731         out = stderr;
 732         print_type(type);
 733         puts("\n");
 734         fflush(stderr);
 735         out = old_out;
 736 }