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