formats/ctf/metadata/ctf-parser.y

   1 %{
   2 /*
   3  * ctf-parser.y
   4  *
   5  * Common Trace Format Metadata Grammar.
   6  *
   7  * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  */
  19
  20 #include <stdio.h>
  21 #include <unistd.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include <assert.h>
  25 #include <glib.h>
  26 #include <errno.h>
  27 #include <inttypes.h>
  28 #include <babeltrace/list.h>
  29 #include "ctf-scanner.h"
  30 #include "ctf-parser.h"
  31 #include "ctf-ast.h"
  32
  33 /*
  34  * TODO: support enum, variant and struct declarations in scopes.
  35  */
  36
  37 /* Join two lists, put "add" at the end of "head".  */
  38 static inline void
  39 _cds_list_splice_tail (struct cds_list_head *add, struct cds_list_head *head)
  40 {
  41         /* Do nothing if the list which gets added is empty.  */
  42         if (add != add->next) {
  43                 add->next->prev = head->prev;
  44                 add->prev->next = head;
  45                 head->prev->next = add->next;
  46                 head->prev = add->prev;
  47         }
  48 }
  49
  50 #define printf_dbg(fmt, args...)        fprintf(stderr, "%s: " fmt, __func__, ## args)
  51
  52 int yyparse(struct ctf_scanner *scanner);
  53 int yylex(union YYSTYPE *yyval, struct ctf_scanner *scanner);
  54 int yylex_init_extra(struct ctf_scanner *scanner, yyscan_t * ptr_yy_globals);
  55 int yylex_destroy(yyscan_t yyscanner) ;
  56 void yyset_in(FILE * in_str, yyscan_t scanner);
  57
  58 int yydebug;
  59
  60 struct gc_string {
  61         struct cds_list_head gc;
  62         size_t alloclen;
  63         char s[];
  64 };
  65
  66 static const char *node_type_to_str[] = {
  67         [ NODE_UNKNOWN ] = "NODE_UNKNOWN",
  68         [ NODE_ROOT ] = "NODE_ROOT",
  69         [ NODE_EVENT ] = "NODE_EVENT",
  70         [ NODE_STREAM ] = "NODE_STREAM",
  71         [ NODE_TRACE ] = "NODE_TRACE",
  72         [ NODE_CTF_EXPRESSION ] = "NODE_CTF_EXPRESSION",
  73         [ NODE_UNARY_EXPRESSION ] = "NODE_UNARY_EXPRESSION",
  74         [ NODE_TYPEDEF ] = "NODE_TYPEDEF",
  75         [ NODE_TYPEALIAS_TARGET ] = "NODE_TYPEALIAS_TARGET",
  76         [ NODE_TYPEALIAS_ALIAS ] = "NODE_TYPEALIAS_ALIAS",
  77         [ NODE_TYPEALIAS ] = "NODE_TYPEALIAS",
  78         [ NODE_TYPE_SPECIFIER ] = "NODE_TYPE_SPECIFIER",
  79         [ NODE_TYPE_SPECIFIER_LIST ] = "NODE_TYPE_SPECIFIER_LIST",
  80         [ NODE_POINTER ] = "NODE_POINTER",
  81         [ NODE_TYPE_DECLARATOR ] = "NODE_TYPE_DECLARATOR",
  82         [ NODE_FLOATING_POINT ] = "NODE_FLOATING_POINT",
  83         [ NODE_INTEGER ] = "NODE_INTEGER",
  84         [ NODE_STRING ] = "NODE_STRING",
  85         [ NODE_ENUMERATOR ] = "NODE_ENUMERATOR",
  86         [ NODE_ENUM ] = "NODE_ENUM",
  87         [ NODE_STRUCT_OR_VARIANT_DECLARATION ] = "NODE_STRUCT_OR_VARIANT_DECLARATION",
  88         [ NODE_VARIANT ] = "NODE_VARIANT",
  89         [ NODE_STRUCT ] = "NODE_STRUCT",
  90 };
  91
  92 const char *node_type(struct ctf_node *node)
  93 {
  94         if (node->type < NR_NODE_TYPES)
  95                 return node_type_to_str[node->type];
  96         else
  97                 return NULL;
  98 }
  99
 100 static struct gc_string *gc_string_alloc(struct ctf_scanner *scanner,
 101                                          size_t len)
 102 {
 103         struct gc_string *gstr;
 104         size_t alloclen;
 105
 106         /* TODO: could be faster with find first bit or glib Gstring */
 107         /* sizeof long to account for malloc header (int or long ?) */
 108         for (alloclen = 8; alloclen < sizeof(long) + sizeof(*gstr) + len;
 109              alloclen *= 2);
 110
 111         gstr = malloc(alloclen);
 112         cds_list_add(&gstr->gc, &scanner->allocated_strings);
 113         gstr->alloclen = alloclen;
 114         return gstr;
 115 }
 116
 117 /*
 118  * note: never use gc_string_append on a string that has external references.
 119  * gsrc will be garbage collected immediately, and gstr might be.
 120  * Should only be used to append characters to a string literal or constant.
 121  */
 122 struct gc_string *gc_string_append(struct ctf_scanner *scanner,
 123                                    struct gc_string *gstr,
 124                                    struct gc_string *gsrc)
 125 {
 126         size_t newlen = strlen(gsrc->s) + strlen(gstr->s) + 1;
 127         size_t alloclen;
 128
 129         /* TODO: could be faster with find first bit or glib Gstring */
 130         /* sizeof long to account for malloc header (int or long ?) */
 131         for (alloclen = 8; alloclen < sizeof(long) + sizeof(*gstr) + newlen;
 132              alloclen *= 2);
 133
 134         if (alloclen > gstr->alloclen) {
 135                 struct gc_string *newgstr;
 136
 137                 newgstr = gc_string_alloc(scanner, newlen);
 138                 strcpy(newgstr->s, gstr->s);
 139                 strcat(newgstr->s, gsrc->s);
 140                 cds_list_del(&gstr->gc);
 141                 free(gstr);
 142                 gstr = newgstr;
 143         } else {
 144                 strcat(gstr->s, gsrc->s);
 145         }
 146         cds_list_del(&gsrc->gc);
 147         free(gsrc);
 148         return gstr;
 149 }
 150
 151 void setstring(struct ctf_scanner *scanner, YYSTYPE *lvalp, const char *src)
 152 {
 153         lvalp->gs = gc_string_alloc(scanner, strlen(src) + 1);
 154         strcpy(lvalp->gs->s, src);
 155 }
 156
 157 static void init_scope(struct ctf_scanner_scope *scope,
 158                        struct ctf_scanner_scope *parent)
 159 {
 160         scope->parent = parent;
 161         scope->types = g_hash_table_new_full(g_str_hash, g_str_equal,
 162                                              NULL, NULL);
 163 }
 164
 165 static void finalize_scope(struct ctf_scanner_scope *scope)
 166 {
 167         g_hash_table_destroy(scope->types);
 168 }
 169
 170 static void push_scope(struct ctf_scanner *scanner)
 171 {
 172         struct ctf_scanner_scope *ns;
 173
 174         printf_dbg("push scope\n");
 175         ns = malloc(sizeof(struct ctf_scanner_scope));
 176         init_scope(ns, scanner->cs);
 177         scanner->cs = ns;
 178 }
 179
 180 static void pop_scope(struct ctf_scanner *scanner)
 181 {
 182         struct ctf_scanner_scope *os;
 183
 184         printf_dbg("pop scope\n");
 185         os = scanner->cs;
 186         scanner->cs = os->parent;
 187         finalize_scope(os);
 188         free(os);
 189 }
 190
 191 static int lookup_type(struct ctf_scanner_scope *s, const char *id)
 192 {
 193         int ret;
 194
 195         ret = (int) (long) g_hash_table_lookup(s->types, id);
 196         printf_dbg("lookup %p %s %d\n", s, id, ret);
 197         return ret;
 198 }
 199
 200 int is_type(struct ctf_scanner *scanner, const char *id)
 201 {
 202         struct ctf_scanner_scope *it;
 203         int ret = 0;
 204
 205         for (it = scanner->cs; it != NULL; it = it->parent) {
 206                 if (lookup_type(it, id)) {
 207                         ret = 1;
 208                         break;
 209                 }
 210         }
 211         printf_dbg("is type %s %d\n", id, ret);
 212         return ret;
 213 }
 214
 215 static void add_type(struct ctf_scanner *scanner, struct gc_string *id)
 216 {
 217         printf_dbg("add type %s\n", id->s);
 218         if (lookup_type(scanner->cs, id->s))
 219                 return;
 220         g_hash_table_insert(scanner->cs->types, id->s, id->s);
 221 }
 222
 223 static struct ctf_node *make_node(struct ctf_scanner *scanner,
 224                                   enum node_type type)
 225 {
 226         struct ctf_ast *ast = ctf_scanner_get_ast(scanner);
 227         struct ctf_node *node;
 228
 229         node = malloc(sizeof(*node));
 230         if (!node)
 231                 return NULL;
 232         memset(node, 0, sizeof(*node));
 233         node->type = type;
 234         CDS_INIT_LIST_HEAD(&node->tmp_head);
 235         cds_list_add(&node->gc, &ast->allocated_nodes);
 236         cds_list_add(&node->siblings, &node->tmp_head);
 237
 238         switch (type) {
 239         case NODE_ROOT:
 240                 fprintf(stderr, "[error] %s: trying to create root node\n", __func__);
 241                 break;
 242
 243         case NODE_EVENT:
 244                 CDS_INIT_LIST_HEAD(&node->u.event.declaration_list);
 245                 break;
 246         case NODE_STREAM:
 247                 CDS_INIT_LIST_HEAD(&node->u.stream.declaration_list);
 248                 break;
 249         case NODE_TRACE:
 250                 CDS_INIT_LIST_HEAD(&node->u.trace.declaration_list);
 251                 break;
 252
 253         case NODE_CTF_EXPRESSION:
 254                 CDS_INIT_LIST_HEAD(&node->u.ctf_expression.left);
 255                 CDS_INIT_LIST_HEAD(&node->u.ctf_expression.right);
 256                 break;
 257         case NODE_UNARY_EXPRESSION:
 258                 break;
 259
 260         case NODE_TYPEDEF:
 261                 CDS_INIT_LIST_HEAD(&node->u._typedef.type_declarators);
 262                 break;
 263         case NODE_TYPEALIAS_TARGET:
 264                 CDS_INIT_LIST_HEAD(&node->u.typealias_target.type_declarators);
 265                 break;
 266         case NODE_TYPEALIAS_ALIAS:
 267                 CDS_INIT_LIST_HEAD(&node->u.typealias_alias.type_declarators);
 268                 break;
 269         case NODE_TYPEALIAS:
 270                 break;
 271
 272         case NODE_TYPE_SPECIFIER:
 273                 break;
 274         case NODE_TYPE_SPECIFIER_LIST:
 275                 CDS_INIT_LIST_HEAD(&node->u.type_specifier_list.head);
 276                 break;
 277         case NODE_POINTER:
 278                 break;
 279         case NODE_TYPE_DECLARATOR:
 280                 CDS_INIT_LIST_HEAD(&node->u.type_declarator.pointers);
 281                 break;
 282
 283         case NODE_FLOATING_POINT:
 284                 CDS_INIT_LIST_HEAD(&node->u.floating_point.expressions);
 285                 break;
 286         case NODE_INTEGER:
 287                 CDS_INIT_LIST_HEAD(&node->u.integer.expressions);
 288                 break;
 289         case NODE_STRING:
 290                 CDS_INIT_LIST_HEAD(&node->u.string.expressions);
 291                 break;
 292         case NODE_ENUMERATOR:
 293                 CDS_INIT_LIST_HEAD(&node->u.enumerator.values);
 294                 break;
 295         case NODE_ENUM:
 296                 CDS_INIT_LIST_HEAD(&node->u._enum.enumerator_list);
 297                 break;
 298         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 299                 CDS_INIT_LIST_HEAD(&node->u.struct_or_variant_declaration.type_declarators);
 300                 break;
 301         case NODE_VARIANT:
 302                 CDS_INIT_LIST_HEAD(&node->u.variant.declaration_list);
 303                 break;
 304         case NODE_STRUCT:
 305                 CDS_INIT_LIST_HEAD(&node->u._struct.declaration_list);
 306                 break;
 307
 308         case NODE_UNKNOWN:
 309         default:
 310                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 311                         (int) type);
 312                 break;
 313         }
 314
 315         return node;
 316 }
 317
 318 static int reparent_ctf_expression(struct ctf_node *node,
 319                                    struct ctf_node *parent)
 320 {
 321         switch (parent->type) {
 322         case NODE_EVENT:
 323                 _cds_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 324                 break;
 325         case NODE_STREAM:
 326                 _cds_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 327                 break;
 328         case NODE_TRACE:
 329                 _cds_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 330                 break;
 331         case NODE_FLOATING_POINT:
 332                 _cds_list_splice_tail(&node->tmp_head, &parent->u.floating_point.expressions);
 333                 break;
 334         case NODE_INTEGER:
 335                 _cds_list_splice_tail(&node->tmp_head, &parent->u.integer.expressions);
 336                 break;
 337         case NODE_STRING:
 338                 _cds_list_splice_tail(&node->tmp_head, &parent->u.string.expressions);
 339                 break;
 340
 341         case NODE_ROOT:
 342         case NODE_CTF_EXPRESSION:
 343         case NODE_TYPEDEF:
 344         case NODE_TYPEALIAS_TARGET:
 345         case NODE_TYPEALIAS_ALIAS:
 346         case NODE_TYPEALIAS:
 347         case NODE_TYPE_SPECIFIER:
 348         case NODE_TYPE_SPECIFIER_LIST:
 349         case NODE_POINTER:
 350         case NODE_TYPE_DECLARATOR:
 351         case NODE_ENUMERATOR:
 352         case NODE_ENUM:
 353         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 354         case NODE_VARIANT:
 355         case NODE_STRUCT:
 356         case NODE_UNARY_EXPRESSION:
 357                 return -EPERM;
 358
 359         case NODE_UNKNOWN:
 360         default:
 361                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 362                         (int) parent->type);
 363                 return -EINVAL;
 364         }
 365         return 0;
 366 }
 367
 368 static int reparent_typedef(struct ctf_node *node, struct ctf_node *parent)
 369 {
 370         switch (parent->type) {
 371         case NODE_ROOT:
 372                 _cds_list_splice_tail(&node->tmp_head, &parent->u.root.declaration_list);
 373                 break;
 374         case NODE_EVENT:
 375                 _cds_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 376                 break;
 377         case NODE_STREAM:
 378                 _cds_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 379                 break;
 380         case NODE_TRACE:
 381                 _cds_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 382                 break;
 383         case NODE_VARIANT:
 384                 _cds_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 385                 break;
 386         case NODE_STRUCT:
 387                 _cds_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 388                 break;
 389
 390         case NODE_FLOATING_POINT:
 391         case NODE_INTEGER:
 392         case NODE_STRING:
 393         case NODE_CTF_EXPRESSION:
 394         case NODE_TYPEDEF:
 395         case NODE_TYPEALIAS_TARGET:
 396         case NODE_TYPEALIAS_ALIAS:
 397         case NODE_TYPEALIAS:
 398         case NODE_TYPE_SPECIFIER:
 399         case NODE_TYPE_SPECIFIER_LIST:
 400         case NODE_POINTER:
 401         case NODE_TYPE_DECLARATOR:
 402         case NODE_ENUMERATOR:
 403         case NODE_ENUM:
 404         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 405         case NODE_UNARY_EXPRESSION:
 406                 return -EPERM;
 407
 408         case NODE_UNKNOWN:
 409         default:
 410                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 411                         (int) parent->type);
 412                 return -EINVAL;
 413         }
 414         return 0;
 415 }
 416
 417 static int reparent_typealias(struct ctf_node *node, struct ctf_node *parent)
 418 {
 419         switch (parent->type) {
 420         case NODE_ROOT:
 421                 _cds_list_splice_tail(&node->tmp_head, &parent->u.root.declaration_list);
 422                 break;
 423         case NODE_EVENT:
 424                 _cds_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 425                 break;
 426         case NODE_STREAM:
 427                 _cds_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 428                 break;
 429         case NODE_TRACE:
 430                 _cds_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 431                 break;
 432         case NODE_VARIANT:
 433                 _cds_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 434                 break;
 435         case NODE_STRUCT:
 436                 _cds_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 437                 break;
 438
 439         case NODE_FLOATING_POINT:
 440         case NODE_INTEGER:
 441         case NODE_STRING:
 442         case NODE_CTF_EXPRESSION:
 443         case NODE_TYPEDEF:
 444         case NODE_TYPEALIAS_TARGET:
 445         case NODE_TYPEALIAS_ALIAS:
 446         case NODE_TYPEALIAS:
 447         case NODE_TYPE_SPECIFIER:
 448         case NODE_TYPE_SPECIFIER_LIST:
 449         case NODE_POINTER:
 450         case NODE_TYPE_DECLARATOR:
 451         case NODE_ENUMERATOR:
 452         case NODE_ENUM:
 453         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 454         case NODE_UNARY_EXPRESSION:
 455                 return -EPERM;
 456
 457         case NODE_UNKNOWN:
 458         default:
 459                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 460                         (int) parent->type);
 461                 return -EINVAL;
 462         }
 463         return 0;
 464 }
 465
 466 static int reparent_type_specifier(struct ctf_node *node,
 467                                    struct ctf_node *parent)
 468 {
 469         switch (parent->type) {
 470         case NODE_TYPE_SPECIFIER_LIST:
 471                 _cds_list_splice_tail(&node->tmp_head, &parent->u.type_specifier_list.head);
 472                 break;
 473
 474         case NODE_TYPE_SPECIFIER:
 475         case NODE_EVENT:
 476         case NODE_STREAM:
 477         case NODE_TRACE:
 478         case NODE_VARIANT:
 479         case NODE_STRUCT:
 480         case NODE_TYPEDEF:
 481         case NODE_TYPEALIAS_TARGET:
 482         case NODE_TYPEALIAS_ALIAS:
 483         case NODE_TYPE_DECLARATOR:
 484         case NODE_ENUM:
 485         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 486         case NODE_TYPEALIAS:
 487         case NODE_FLOATING_POINT:
 488         case NODE_INTEGER:
 489         case NODE_STRING:
 490         case NODE_CTF_EXPRESSION:
 491         case NODE_POINTER:
 492         case NODE_ENUMERATOR:
 493         case NODE_UNARY_EXPRESSION:
 494                 return -EPERM;
 495
 496         case NODE_UNKNOWN:
 497         default:
 498                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 499                         (int) parent->type);
 500                 return -EINVAL;
 501         }
 502         return 0;
 503 }
 504
 505 static int reparent_type_specifier_list(struct ctf_node *node,
 506                                         struct ctf_node *parent)
 507 {
 508         switch (parent->type) {
 509         case NODE_ROOT:
 510                 cds_list_add_tail(&node->siblings, &parent->u.root.declaration_list);
 511                 break;
 512         case NODE_EVENT:
 513                 cds_list_add_tail(&node->siblings, &parent->u.event.declaration_list);
 514                 break;
 515         case NODE_STREAM:
 516                 cds_list_add_tail(&node->siblings, &parent->u.stream.declaration_list);
 517                 break;
 518         case NODE_TRACE:
 519                 cds_list_add_tail(&node->siblings, &parent->u.trace.declaration_list);
 520                 break;
 521         case NODE_VARIANT:
 522                 cds_list_add_tail(&node->siblings, &parent->u.variant.declaration_list);
 523                 break;
 524         case NODE_STRUCT:
 525                 cds_list_add_tail(&node->siblings, &parent->u._struct.declaration_list);
 526                 break;
 527         case NODE_TYPEDEF:
 528                 parent->u._typedef.type_specifier_list = node;
 529                 break;
 530         case NODE_TYPEALIAS_TARGET:
 531                 parent->u.typealias_target.type_specifier_list = node;
 532                 break;
 533         case NODE_TYPEALIAS_ALIAS:
 534                 parent->u.typealias_alias.type_specifier_list = node;
 535                 break;
 536         case NODE_TYPE_DECLARATOR:
 537                 parent->u.type_declarator.type = TYPEDEC_NESTED;
 538                 parent->u.type_declarator.u.nested.length = node;
 539                 break;
 540         case NODE_ENUM:
 541                 parent->u._enum.container_type = node;
 542                 break;
 543         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 544                 parent->u.struct_or_variant_declaration.type_specifier_list = node;
 545                 break;
 546         case NODE_TYPE_SPECIFIER:
 547         case NODE_TYPEALIAS:
 548         case NODE_FLOATING_POINT:
 549         case NODE_INTEGER:
 550         case NODE_STRING:
 551         case NODE_CTF_EXPRESSION:
 552         case NODE_POINTER:
 553         case NODE_ENUMERATOR:
 554         case NODE_UNARY_EXPRESSION:
 555                 return -EPERM;
 556
 557         case NODE_UNKNOWN:
 558         default:
 559                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 560                         (int) parent->type);
 561                 return -EINVAL;
 562         }
 563         return 0;
 564 }
 565
 566 static int reparent_type_declarator(struct ctf_node *node,
 567                                     struct ctf_node *parent)
 568 {
 569         switch (parent->type) {
 570         case NODE_TYPE_DECLARATOR:
 571                 parent->u.type_declarator.type = TYPEDEC_NESTED;
 572                 parent->u.type_declarator.u.nested.type_declarator = node;
 573                 break;
 574         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 575                 _cds_list_splice_tail(&node->tmp_head, &parent->u.struct_or_variant_declaration.type_declarators);
 576                 break;
 577         case NODE_TYPEDEF:
 578                 _cds_list_splice_tail(&node->tmp_head, &parent->u._typedef.type_declarators);
 579                 break;
 580         case NODE_TYPEALIAS_TARGET:
 581                 _cds_list_splice_tail(&node->tmp_head, &parent->u.typealias_target.type_declarators);
 582                 break;
 583         case NODE_TYPEALIAS_ALIAS:
 584                 _cds_list_splice_tail(&node->tmp_head, &parent->u.typealias_alias.type_declarators);
 585                 break;
 586
 587         case NODE_ROOT:
 588         case NODE_EVENT:
 589         case NODE_STREAM:
 590         case NODE_TRACE:
 591         case NODE_VARIANT:
 592         case NODE_STRUCT:
 593         case NODE_TYPEALIAS:
 594         case NODE_ENUM:
 595         case NODE_FLOATING_POINT:
 596         case NODE_INTEGER:
 597         case NODE_STRING:
 598         case NODE_CTF_EXPRESSION:
 599         case NODE_TYPE_SPECIFIER:
 600         case NODE_TYPE_SPECIFIER_LIST:
 601         case NODE_POINTER:
 602         case NODE_ENUMERATOR:
 603         case NODE_UNARY_EXPRESSION:
 604                 return -EPERM;
 605
 606         case NODE_UNKNOWN:
 607         default:
 608                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 609                         (int) parent->type);
 610                 return -EINVAL;
 611         }
 612         return 0;
 613 }
 614
 615 /*
 616  * set_parent_node
 617  *
 618  * Link node to parent. Returns 0 on success, -EPERM if it is not permitted to
 619  * create the link declared by the input, -ENOENT if node or parent is NULL,
 620  * -EINVAL if there is an internal structure problem.
 621  */
 622 static int set_parent_node(struct ctf_node *node,
 623                          struct ctf_node *parent)
 624 {
 625         if (!node || !parent)
 626                 return -ENOENT;
 627
 628         /* Note: Linking to parent will be done only by an external visitor */
 629
 630         switch (node->type) {
 631         case NODE_ROOT:
 632                 fprintf(stderr, "[error] %s: trying to reparent root node\n", __func__);
 633                 return -EINVAL;
 634
 635         case NODE_EVENT:
 636                 if (parent->type == NODE_ROOT) {
 637                         _cds_list_splice_tail(&node->tmp_head, &parent->u.root.event);
 638                 } else {
 639                         return -EPERM;
 640                 }
 641                 break;
 642         case NODE_STREAM:
 643                 if (parent->type == NODE_ROOT) {
 644                         _cds_list_splice_tail(&node->tmp_head, &parent->u.root.stream);
 645                 } else {
 646                         return -EPERM;
 647                 }
 648                 break;
 649         case NODE_TRACE:
 650                 if (parent->type == NODE_ROOT) {
 651                         _cds_list_splice_tail(&node->tmp_head, &parent->u.root.trace);
 652                 } else {
 653                         return -EPERM;
 654                 }
 655                 break;
 656
 657         case NODE_CTF_EXPRESSION:
 658                 return reparent_ctf_expression(node, parent);
 659         case NODE_UNARY_EXPRESSION:
 660                 if (parent->type == NODE_TYPE_DECLARATOR)
 661                         parent->u.type_declarator.bitfield_len = node;
 662                 else
 663                         return -EPERM;
 664                 break;
 665
 666         case NODE_TYPEDEF:
 667                 return reparent_typedef(node, parent);
 668         case NODE_TYPEALIAS_TARGET:
 669                 if (parent->type == NODE_TYPEALIAS)
 670                         parent->u.typealias.target = node;
 671                 else
 672                         return -EINVAL;
 673         case NODE_TYPEALIAS_ALIAS:
 674                 if (parent->type == NODE_TYPEALIAS)
 675                         parent->u.typealias.alias = node;
 676                 else
 677                         return -EINVAL;
 678         case NODE_TYPEALIAS:
 679                 return reparent_typealias(node, parent);
 680
 681         case NODE_POINTER:
 682                 if (parent->type == NODE_TYPE_DECLARATOR) {
 683                         _cds_list_splice_tail(&node->tmp_head, &parent->u.type_declarator.pointers);
 684                 } else
 685                         return -EPERM;
 686                 break;
 687         case NODE_TYPE_DECLARATOR:
 688                 return reparent_type_declarator(node, parent);
 689
 690         case NODE_TYPE_SPECIFIER_LIST:
 691                 return reparent_type_specifier_list(node, parent);
 692
 693         case NODE_TYPE_SPECIFIER:
 694                 return reparent_type_specifier(node, parent);
 695
 696         case NODE_FLOATING_POINT:
 697         case NODE_INTEGER:
 698         case NODE_STRING:
 699         case NODE_ENUM:
 700         case NODE_VARIANT:
 701         case NODE_STRUCT:
 702                 return -EINVAL; /* Dealt with internally within grammar */
 703
 704         case NODE_ENUMERATOR:
 705                 if (parent->type == NODE_ENUM) {
 706                         _cds_list_splice_tail(&node->tmp_head, &parent->u._enum.enumerator_list);
 707                 } else {
 708                         return -EPERM;
 709                 }
 710                 break;
 711         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 712                 switch (parent->type) {
 713                 case NODE_STRUCT:
 714                         _cds_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 715                         break;
 716                 case NODE_VARIANT:
 717                         _cds_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 718                         break;
 719                 default:
 720                         return -EINVAL;
 721                 }
 722                 break;
 723
 724         case NODE_UNKNOWN:
 725         default:
 726                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
 727                         (int) parent->type);
 728                 return -EINVAL;
 729         }
 730         return 0;
 731 }
 732
 733 void yyerror(struct ctf_scanner *scanner, const char *str)
 734 {
 735         fprintf(stderr, "error %s\n", str);
 736 }
 737
 738 int yywrap(void)
 739 {
 740         return 1;
 741 }
 742
 743 #define reparent_error(scanner, str)                            \
 744 do {                                                            \
 745         yyerror(scanner, YY_("reparent_error: " str "\n"));     \
 746         YYERROR;                                                \
 747 } while (0)
 748
 749 static void free_strings(struct cds_list_head *list)
 750 {
 751         struct gc_string *gstr, *tmp;
 752
 753         cds_list_for_each_entry_safe(gstr, tmp, list, gc)
 754                 free(gstr);
 755 }
 756
 757 static struct ctf_ast *ctf_ast_alloc(void)
 758 {
 759         struct ctf_ast *ast;
 760
 761         ast = malloc(sizeof(*ast));
 762         if (!ast)
 763                 return NULL;
 764         memset(ast, 0, sizeof(*ast));
 765         CDS_INIT_LIST_HEAD(&ast->allocated_nodes);
 766         ast->root.type = NODE_ROOT;
 767         CDS_INIT_LIST_HEAD(&ast->root.tmp_head);
 768         CDS_INIT_LIST_HEAD(&ast->root.u.root.declaration_list);
 769         CDS_INIT_LIST_HEAD(&ast->root.u.root.trace);
 770         CDS_INIT_LIST_HEAD(&ast->root.u.root.stream);
 771         CDS_INIT_LIST_HEAD(&ast->root.u.root.event);
 772         return ast;
 773 }
 774
 775 static void ctf_ast_free(struct ctf_ast *ast)
 776 {
 777         struct ctf_node *node, *tmp;
 778
 779         cds_list_for_each_entry_safe(node, tmp, &ast->allocated_nodes, gc)
 780                 free(node);
 781 }
 782
 783 int ctf_scanner_append_ast(struct ctf_scanner *scanner)
 784 {
 785         return yyparse(scanner);
 786 }
 787
 788 struct ctf_scanner *ctf_scanner_alloc(FILE *input)
 789 {
 790         struct ctf_scanner *scanner;
 791         int ret;
 792
 793         scanner = malloc(sizeof(*scanner));
 794         if (!scanner)
 795                 return NULL;
 796         memset(scanner, 0, sizeof(*scanner));
 797
 798         ret = yylex_init_extra(scanner, &scanner->scanner);
 799         if (ret) {
 800                 fprintf(stderr, "yylex_init error\n");
 801                 goto cleanup_scanner;
 802         }
 803         yyset_in(input, scanner);
 804
 805         scanner->ast = ctf_ast_alloc();
 806         if (!scanner->ast)
 807                 goto cleanup_lexer;
 808         init_scope(&scanner->root_scope, NULL);
 809         scanner->cs = &scanner->root_scope;
 810         CDS_INIT_LIST_HEAD(&scanner->allocated_strings);
 811
 812         return scanner;
 813
 814 cleanup_lexer:
 815         ret = yylex_destroy(scanner->scanner);
 816         if (!ret)
 817                 fprintf(stderr, "yylex_destroy error\n");
 818 cleanup_scanner:
 819         free(scanner);
 820         return NULL;
 821 }
 822
 823 void ctf_scanner_free(struct ctf_scanner *scanner)
 824 {
 825         int ret;
 826
 827         finalize_scope(&scanner->root_scope);
 828         free_strings(&scanner->allocated_strings);
 829         ctf_ast_free(scanner->ast);
 830         ret = yylex_destroy(scanner->scanner);
 831         if (ret)
 832                 fprintf(stderr, "yylex_destroy error\n");
 833         free(scanner);
 834 }
 835
 836 %}
 837
 838 %define api.pure
 839         /* %locations */
 840 %parse-param {struct ctf_scanner *scanner}
 841 %lex-param {struct ctf_scanner *scanner}
 842 %start file
 843 %token CHARACTER_CONSTANT_START SQUOTE STRING_LITERAL_START DQUOTE ESCSEQ CHAR_STRING_TOKEN LSBRAC RSBRAC LPAREN RPAREN LBRAC RBRAC RARROW STAR PLUS MINUS LT GT TYPEASSIGN COLON SEMICOLON DOTDOTDOT DOT EQUAL COMMA CONST CHAR DOUBLE ENUM EVENT FLOATING_POINT FLOAT INTEGER INT LONG SHORT SIGNED STREAM STRING STRUCT TRACE TYPEALIAS TYPEDEF UNSIGNED VARIANT VOID _BOOL _COMPLEX _IMAGINARY DECIMAL_CONSTANT OCTAL_CONSTANT HEXADECIMAL_CONSTANT
 844 %token <gs> IDENTIFIER ID_TYPE
 845 %token ERROR
 846 %union
 847 {
 848         long long ll;
 849         char c;
 850         struct gc_string *gs;
 851         struct ctf_node *n;
 852 }
 853
 854 %type <gs> keywords
 855 %type <gs> s_char s_char_sequence c_char c_char_sequence
 856
 857 %type <n> postfix_expression unary_expression unary_expression_or_range
 858
 859 %type <n> declaration
 860 %type <n> event_declaration
 861 %type <n> stream_declaration
 862 %type <n> trace_declaration
 863 %type <n> declaration_specifiers
 864 %type <n> alias_declaration_specifiers
 865
 866 %type <n> type_declarator_list
 867 %type <n> type_specifier
 868 %type <n> struct_type_specifier
 869 %type <n> variant_type_specifier
 870 %type <n> declaration_specifiers_or_integer_constant
 871 %type <n> enum_type_specifier
 872 %type <n> struct_or_variant_declaration_list
 873 %type <n> struct_or_variant_declaration
 874 %type <n> struct_or_variant_declarator_list
 875 %type <n> struct_or_variant_declarator
 876 %type <n> enumerator_list
 877 %type <n> enumerator
 878 %type <n> abstract_declarator_list
 879 %type <n> abstract_declarator
 880 %type <n> direct_abstract_declarator
 881 %type <n> alias_abstract_declarator_list
 882 %type <n> alias_abstract_declarator
 883 %type <n> direct_alias_abstract_declarator
 884 %type <n> declarator
 885 %type <n> direct_declarator
 886 %type <n> type_declarator
 887 %type <n> direct_type_declarator
 888 %type <n> pointer
 889 %type <n> ctf_assignment_expression_list
 890 %type <n> ctf_assignment_expression
 891
 892 %%
 893
 894 file:
 895                 declaration
 896                 {
 897                         if (set_parent_node($1, &ctf_scanner_get_ast(scanner)->root))
 898                                 reparent_error(scanner, "error reparenting to root");
 899                 }
 900         |       file declaration
 901                 {
 902                         if (set_parent_node($2, &ctf_scanner_get_ast(scanner)->root))
 903                                 reparent_error(scanner, "error reparenting to root");
 904                 }
 905         ;
 906
 907 keywords:
 908                 VOID
 909                 {       $$ = yylval.gs;         }
 910         |       CHAR
 911                 {       $$ = yylval.gs;         }
 912         |       SHORT
 913                 {       $$ = yylval.gs;         }
 914         |       INT
 915                 {       $$ = yylval.gs;         }
 916         |       LONG
 917                 {       $$ = yylval.gs;         }
 918         |       FLOAT
 919                 {       $$ = yylval.gs;         }
 920         |       DOUBLE
 921                 {       $$ = yylval.gs;         }
 922         |       SIGNED
 923                 {       $$ = yylval.gs;         }
 924         |       UNSIGNED
 925                 {       $$ = yylval.gs;         }
 926         |       _BOOL
 927                 {       $$ = yylval.gs;         }
 928         |       _COMPLEX
 929                 {       $$ = yylval.gs;         }
 930         |       _IMAGINARY
 931                 {       $$ = yylval.gs;         }
 932         |       FLOATING_POINT
 933                 {       $$ = yylval.gs;         }
 934         |       INTEGER
 935                 {       $$ = yylval.gs;         }
 936         |       STRING
 937                 {       $$ = yylval.gs;         }
 938         |       ENUM
 939                 {       $$ = yylval.gs;         }
 940         |       VARIANT
 941                 {       $$ = yylval.gs;         }
 942         |       STRUCT
 943                 {       $$ = yylval.gs;         }
 944         |       CONST
 945                 {       $$ = yylval.gs;         }
 946         |       TYPEDEF
 947                 {       $$ = yylval.gs;         }
 948         |       EVENT
 949                 {       $$ = yylval.gs;         }
 950         |       STREAM
 951                 {       $$ = yylval.gs;         }
 952         |       TRACE
 953                 {       $$ = yylval.gs;         }
 954         ;
 955
 956 /* 1.5 Constants */
 957
 958 c_char_sequence:
 959                 c_char
 960                 {       $$ = $1;                                        }
 961         |       c_char_sequence c_char
 962                 {       $$ = gc_string_append(scanner, $1, $2);         }
 963         ;
 964
 965 c_char:
 966                 CHAR_STRING_TOKEN
 967                 {       $$ = yylval.gs;                                 }
 968         |       ESCSEQ
 969                 {
 970                         reparent_error(scanner, "escape sequences not supported yet");
 971                 }
 972         ;
 973
 974 /* 1.6 String literals */
 975
 976 s_char_sequence:
 977                 s_char
 978                 {       $$ = $1;                                        }
 979         |       s_char_sequence s_char
 980                 {       $$ = gc_string_append(scanner, $1, $2);         }
 981         ;
 982
 983 s_char:
 984                 CHAR_STRING_TOKEN
 985                 {       $$ = yylval.gs;                                 }
 986         |       ESCSEQ
 987                 {
 988                         reparent_error(scanner, "escape sequences not supported yet");
 989                 }
 990         ;
 991
 992 /* 2: Phrase structure grammar */
 993
 994 postfix_expression:
 995                 IDENTIFIER
 996                 {
 997                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
 998                         $$->u.unary_expression.type = UNARY_STRING;
 999                         $$->u.unary_expression.u.string = yylval.gs->s;
1000                 }
1001         |       ID_TYPE
1002                 {
1003                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1004                         $$->u.unary_expression.type = UNARY_STRING;
1005                         $$->u.unary_expression.u.string = yylval.gs->s;
1006                 }
1007         |       keywords
1008                 {
1009                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1010                         $$->u.unary_expression.type = UNARY_STRING;
1011                         $$->u.unary_expression.u.string = yylval.gs->s;
1012                 }
1013
1014         |       DECIMAL_CONSTANT
1015                 {
1016                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1017                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1018                         sscanf(yylval.gs->s, "%" PRIu64,
1019                                &$$->u.unary_expression.u.unsigned_constant);
1020                 }
1021         |       OCTAL_CONSTANT
1022                 {
1023                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1024                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1025                         sscanf(yylval.gs->s, "0%" PRIo64,
1026                                &$$->u.unary_expression.u.unsigned_constant);
1027                 }
1028         |       HEXADECIMAL_CONSTANT
1029                 {
1030                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1031                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1032                         sscanf(yylval.gs->s, "0x%" PRIx64,
1033                                &$$->u.unary_expression.u.unsigned_constant);
1034                 }
1035         |       STRING_LITERAL_START DQUOTE
1036                 {
1037                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1038                         $$->u.unary_expression.type = UNARY_STRING;
1039                         $$->u.unary_expression.u.string = "";
1040                 }
1041         |       STRING_LITERAL_START s_char_sequence DQUOTE
1042                 {
1043                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1044                         $$->u.unary_expression.type = UNARY_STRING;
1045                         $$->u.unary_expression.u.string = $2->s;
1046                 }
1047         |       CHARACTER_CONSTANT_START c_char_sequence SQUOTE
1048                 {
1049                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1050                         $$->u.unary_expression.type = UNARY_STRING;
1051                         $$->u.unary_expression.u.string = $2->s;
1052                 }
1053         |       LPAREN unary_expression RPAREN
1054                 {
1055                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1056                         $$->u.unary_expression.type = UNARY_NESTED;
1057                         $$->u.unary_expression.u.nested_exp = $2;
1058                 }
1059         |       postfix_expression LSBRAC unary_expression RSBRAC
1060                 {
1061                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1062                         $$->u.unary_expression.type = UNARY_SBRAC;
1063                         $$->u.unary_expression.u.sbrac_exp = $3;
1064                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1065                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1066                 }
1067         |       postfix_expression DOT IDENTIFIER
1068                 {
1069                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1070                         $$->u.unary_expression.type = UNARY_STRING;
1071                         $$->u.unary_expression.u.string = yylval.gs->s;
1072                         $$->u.unary_expression.link = UNARY_DOTLINK;
1073                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1074                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1075                 }
1076         |       postfix_expression DOT ID_TYPE
1077                 {
1078                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1079                         $$->u.unary_expression.type = UNARY_STRING;
1080                         $$->u.unary_expression.u.string = yylval.gs->s;
1081                         $$->u.unary_expression.link = UNARY_DOTLINK;
1082                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1083                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1084                 }
1085         |       postfix_expression RARROW IDENTIFIER
1086                 {
1087                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1088                         $$->u.unary_expression.type = UNARY_STRING;
1089                         $$->u.unary_expression.u.string = yylval.gs->s;
1090                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1091                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1092                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1093                 }
1094         |       postfix_expression RARROW ID_TYPE
1095                 {
1096                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1097                         $$->u.unary_expression.type = UNARY_STRING;
1098                         $$->u.unary_expression.u.string = yylval.gs->s;
1099                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1100                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1101                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1102                 }
1103         ;
1104
1105 unary_expression:
1106                 postfix_expression
1107                 {       $$ = $1;                                }
1108         |       PLUS postfix_expression
1109                 {       $$ = $2;                                }
1110         |       MINUS postfix_expression
1111                 {
1112                         $$ = $2;
1113                         if ($$->u.unary_expression.type != UNARY_SIGNED_CONSTANT
1114                                 && $$->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT)
1115                                 reparent_error(scanner, "expecting numeric constant");
1116
1117                         if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1118                                 $$->u.unary_expression.type = UNARY_SIGNED_CONSTANT;
1119                                 $$->u.unary_expression.u.signed_constant =
1120                                         -($$->u.unary_expression.u.unsigned_constant);
1121                         } else {
1122                                 $$->u.unary_expression.u.signed_constant =
1123                                         -($$->u.unary_expression.u.signed_constant);
1124                         }
1125                 }
1126         ;
1127
1128 unary_expression_or_range:
1129                 unary_expression DOTDOTDOT unary_expression
1130                 {
1131                         $$ = $1;
1132                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->tmp_head);
1133                         $3->u.unary_expression.link = UNARY_DOTDOTDOT;
1134                 }
1135         |       unary_expression
1136                 {       $$ = $1;                }
1137         ;
1138
1139 /* 2.2: Declarations */
1140
1141 declaration:
1142                 declaration_specifiers SEMICOLON
1143                 {       $$ = $1;        }
1144         |       event_declaration
1145                 {       $$ = $1;        }
1146         |       stream_declaration
1147                 {       $$ = $1;        }
1148         |       trace_declaration
1149                 {       $$ = $1;        }
1150         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1151                 {
1152                         struct ctf_node *list;
1153
1154                         $$ = make_node(scanner, NODE_TYPEDEF);
1155                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1156                         $$->u._typedef.type_specifier_list = list;
1157                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1158                         _cds_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1159                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
1160                 }
1161         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1162                 {
1163                         struct ctf_node *list;
1164
1165                         $$ = make_node(scanner, NODE_TYPEDEF);
1166                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1167                         $$->u._typedef.type_specifier_list = list;
1168                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1169                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1170                 }
1171         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
1172                 {
1173                         struct ctf_node *list;
1174
1175                         $$ = make_node(scanner, NODE_TYPEDEF);
1176                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1177                         $$->u._typedef.type_specifier_list = list;
1178                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1179                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1180                 }
1181         |       TYPEALIAS declaration_specifiers abstract_declarator_list COLON alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
1182                 {
1183                         struct ctf_node *list;
1184
1185                         $$ = make_node(scanner, NODE_TYPEALIAS);
1186                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
1187                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
1188
1189                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1190                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
1191                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1192                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
1193
1194                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1195                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
1196                         _cds_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1197                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
1198                 }
1199         ;
1200
1201 event_declaration:
1202                 event_declaration_begin event_declaration_end
1203                 {
1204                         $$ = make_node(scanner, NODE_EVENT);
1205                 }
1206         |       event_declaration_begin ctf_assignment_expression_list event_declaration_end
1207                 {
1208                         $$ = make_node(scanner, NODE_EVENT);
1209                         if (set_parent_node($2, $$))
1210                                 reparent_error(scanner, "event_declaration");
1211                 }
1212         ;
1213
1214 event_declaration_begin:
1215                 EVENT LBRAC
1216                 {       push_scope(scanner);    }
1217         ;
1218
1219 event_declaration_end:
1220                 RBRAC SEMICOLON
1221                 {       pop_scope(scanner);     }
1222         ;
1223
1224
1225 stream_declaration:
1226                 stream_declaration_begin stream_declaration_end
1227                 {
1228                         $$ = make_node(scanner, NODE_STREAM);
1229                 }
1230         |       stream_declaration_begin ctf_assignment_expression_list stream_declaration_end
1231                 {
1232                         $$ = make_node(scanner, NODE_STREAM);
1233                         if (set_parent_node($2, $$))
1234                                 reparent_error(scanner, "stream_declaration");
1235                 }
1236         ;
1237
1238 stream_declaration_begin:
1239                 STREAM LBRAC
1240                 {       push_scope(scanner);    }
1241         ;
1242
1243 stream_declaration_end:
1244                 RBRAC SEMICOLON
1245                 {       pop_scope(scanner);     }
1246         ;
1247
1248
1249 trace_declaration:
1250                 trace_declaration_begin trace_declaration_end
1251                 {
1252                         $$ = make_node(scanner, NODE_TRACE);
1253                 }
1254         |       trace_declaration_begin ctf_assignment_expression_list trace_declaration_end
1255                 {
1256                         $$ = make_node(scanner, NODE_TRACE);
1257                         if (set_parent_node($2, $$))
1258                                 reparent_error(scanner, "trace_declaration");
1259                 }
1260         ;
1261
1262 trace_declaration_begin:
1263                 TRACE LBRAC
1264                 {       push_scope(scanner);    }
1265         ;
1266
1267 trace_declaration_end:
1268                 RBRAC SEMICOLON
1269                 {       pop_scope(scanner);     }
1270         ;
1271
1272 declaration_specifiers:
1273                 CONST
1274                 {
1275                         struct ctf_node *node;
1276
1277                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1278                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1279                         node->u.type_specifier.type = TYPESPEC_CONST;
1280                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1281                 }
1282         |       type_specifier
1283                 {
1284                         struct ctf_node *node;
1285
1286                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1287                         node = $1;
1288                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1289                 }
1290         |       declaration_specifiers CONST
1291                 {
1292                         struct ctf_node *node;
1293
1294                         $$ = $1;
1295                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1296                         node->u.type_specifier.type = TYPESPEC_CONST;
1297                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1298                 }
1299         |       declaration_specifiers type_specifier
1300                 {
1301                         $$ = $1;
1302                         cds_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1303                 }
1304         ;
1305
1306 type_declarator_list:
1307                 type_declarator
1308                 {       $$ = $1;        }
1309         |       type_declarator_list COMMA type_declarator
1310                 {
1311                         $$ = $1;
1312                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1313                 }
1314         ;
1315
1316 type_specifier:
1317                 VOID
1318                 {
1319                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1320                         $$->u.type_specifier.type = TYPESPEC_VOID;
1321                 }
1322         |       CHAR
1323                 {
1324                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1325                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1326                 }
1327         |       SHORT
1328                 {
1329                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1330                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1331                 }
1332         |       INT
1333                 {
1334                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1335                         $$->u.type_specifier.type = TYPESPEC_INT;
1336                 }
1337         |       LONG
1338                 {
1339                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1340                         $$->u.type_specifier.type = TYPESPEC_LONG;
1341                 }
1342         |       FLOAT
1343                 {
1344                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1345                         $$->u.type_specifier.type = TYPESPEC_FLOAT;
1346                 }
1347         |       DOUBLE
1348                 {
1349                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1350                         $$->u.type_specifier.type = TYPESPEC_DOUBLE;
1351                 }
1352         |       SIGNED
1353                 {
1354                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1355                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1356                 }
1357         |       UNSIGNED
1358                 {
1359                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1360                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1361                 }
1362         |       _BOOL
1363                 {
1364                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1365                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1366                 }
1367         |       _COMPLEX
1368                 {
1369                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1370                         $$->u.type_specifier.type = TYPESPEC_COMPLEX;
1371                 }
1372         |       _IMAGINARY
1373                 {
1374                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1375                         $$->u.type_specifier.type = TYPESPEC_IMAGINARY;
1376                 }
1377         |       ID_TYPE
1378                 {
1379                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1380                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1381                         $$->u.type_specifier.id_type = yylval.gs->s;
1382                 }
1383         |       FLOATING_POINT LBRAC RBRAC
1384                 {
1385                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1386                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1387                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1388                 }
1389         |       FLOATING_POINT LBRAC ctf_assignment_expression_list RBRAC
1390                 {
1391                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1392                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1393                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1394                         if (set_parent_node($3, $$->u.type_specifier.node))
1395                                 reparent_error(scanner, "floating point reparent error");
1396                 }
1397         |       INTEGER LBRAC RBRAC
1398                 {
1399                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1400                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1401                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1402                 }
1403         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1404                 {
1405                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1406                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1407                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1408                         if (set_parent_node($3, $$->u.type_specifier.node))
1409                                 reparent_error(scanner, "integer reparent error");
1410                 }
1411         |       STRING LBRAC RBRAC
1412                 {
1413                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1414                         $$->u.type_specifier.type = TYPESPEC_STRING;
1415                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1416                 }
1417         |       STRING LBRAC ctf_assignment_expression_list RBRAC
1418                 {
1419                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1420                         $$->u.type_specifier.type = TYPESPEC_STRING;
1421                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1422                         if (set_parent_node($3, $$->u.type_specifier.node))
1423                                 reparent_error(scanner, "string reparent error");
1424                 }
1425         |       ENUM enum_type_specifier
1426                 {
1427                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1428                         $$->u.type_specifier.type = TYPESPEC_ENUM;
1429                         $$->u.type_specifier.node = $2;
1430                 }
1431         |       VARIANT variant_type_specifier
1432                 {
1433                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1434                         $$->u.type_specifier.type = TYPESPEC_VARIANT;
1435                         $$->u.type_specifier.node = $2;
1436                 }
1437         |       STRUCT struct_type_specifier
1438                 {
1439                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1440                         $$->u.type_specifier.type = TYPESPEC_STRUCT;
1441                         $$->u.type_specifier.node = $2;
1442                 }
1443         ;
1444
1445 struct_type_specifier:
1446                 struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1447                 {
1448                         $$ = make_node(scanner, NODE_STRUCT);
1449                         $$->u._struct.has_body = 1;
1450                         if (set_parent_node($2, $$))
1451                                 reparent_error(scanner, "struct reparent error");
1452                 }
1453         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1454                 {
1455                         $$ = make_node(scanner, NODE_STRUCT);
1456                         $$->u._struct.has_body = 1;
1457                         $$->u._struct.name = $1->s;
1458                         if (set_parent_node($3, $$))
1459                                 reparent_error(scanner, "struct reparent error");
1460                 }
1461         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1462                 {
1463                         $$ = make_node(scanner, NODE_STRUCT);
1464                         $$->u._struct.has_body = 1;
1465                         $$->u._struct.name = $1->s;
1466                         if (set_parent_node($3, $$))
1467                                 reparent_error(scanner, "struct reparent error");
1468                 }
1469         |       IDENTIFIER
1470                 {
1471                         $$ = make_node(scanner, NODE_STRUCT);
1472                         $$->u._struct.has_body = 0;
1473                         $$->u._struct.name = $1->s;
1474                 }
1475         |       ID_TYPE
1476                 {
1477                         $$ = make_node(scanner, NODE_STRUCT);
1478                         $$->u._struct.has_body = 0;
1479                         $$->u._struct.name = $1->s;
1480                 }
1481         ;
1482
1483 struct_declaration_begin:
1484                 LBRAC
1485                 {       push_scope(scanner);    }
1486         ;
1487
1488 struct_declaration_end:
1489                 RBRAC
1490                 {       pop_scope(scanner);     }
1491         ;
1492
1493 variant_type_specifier:
1494                 variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1495                 {
1496                         $$ = make_node(scanner, NODE_VARIANT);
1497                         $$->u.variant.has_body = 1;
1498                         if (set_parent_node($2, $$))
1499                                 reparent_error(scanner, "variant reparent error");
1500                 }
1501         |       LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1502                 {
1503                         $$ = make_node(scanner, NODE_VARIANT);
1504                         $$->u.variant.has_body = 1;
1505                         $$->u.variant.choice = $2->s;
1506                         if (set_parent_node($5, $$))
1507                                 reparent_error(scanner, "variant reparent error");
1508                 }
1509         |       LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1510                 {
1511                         $$ = make_node(scanner, NODE_VARIANT);
1512                         $$->u.variant.has_body = 1;
1513                         $$->u.variant.choice = $2->s;
1514                         if (set_parent_node($5, $$))
1515                                 reparent_error(scanner, "variant reparent error");
1516                 }
1517         |       IDENTIFIER variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1518                 {
1519                         $$ = make_node(scanner, NODE_VARIANT);
1520                         $$->u.variant.has_body = 1;
1521                         $$->u.variant.name = $1->s;
1522                         if (set_parent_node($3, $$))
1523                                 reparent_error(scanner, "variant reparent error");
1524                 }
1525         |       IDENTIFIER LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1526                 {
1527                         $$ = make_node(scanner, NODE_VARIANT);
1528                         $$->u.variant.has_body = 1;
1529                         $$->u.variant.name = $1->s;
1530                         $$->u.variant.choice = $3->s;
1531                         if (set_parent_node($6, $$))
1532                                 reparent_error(scanner, "variant reparent error");
1533                 }
1534         |       IDENTIFIER LT IDENTIFIER GT
1535                 {
1536                         $$ = make_node(scanner, NODE_VARIANT);
1537                         $$->u.variant.has_body = 0;
1538                         $$->u.variant.name = $1->s;
1539                         $$->u.variant.choice = $3->s;
1540                 }
1541         |       IDENTIFIER LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1542                 {
1543                         $$ = make_node(scanner, NODE_VARIANT);
1544                         $$->u.variant.has_body = 1;
1545                         $$->u.variant.name = $1->s;
1546                         $$->u.variant.choice = $3->s;
1547                         if (set_parent_node($6, $$))
1548                                 reparent_error(scanner, "variant reparent error");
1549                 }
1550         |       IDENTIFIER LT ID_TYPE GT
1551                 {
1552                         $$ = make_node(scanner, NODE_VARIANT);
1553                         $$->u.variant.has_body = 0;
1554                         $$->u.variant.name = $1->s;
1555                         $$->u.variant.choice = $3->s;
1556                 }
1557         |       ID_TYPE variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1558                 {
1559                         $$ = make_node(scanner, NODE_VARIANT);
1560                         $$->u.variant.has_body = 1;
1561                         $$->u.variant.name = $1->s;
1562                         if (set_parent_node($3, $$))
1563                                 reparent_error(scanner, "variant reparent error");
1564                 }
1565         |       ID_TYPE LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1566                 {
1567                         $$ = make_node(scanner, NODE_VARIANT);
1568                         $$->u.variant.has_body = 1;
1569                         $$->u.variant.name = $1->s;
1570                         $$->u.variant.choice = $3->s;
1571                         if (set_parent_node($6, $$))
1572                                 reparent_error(scanner, "variant reparent error");
1573                 }
1574         |       ID_TYPE LT IDENTIFIER GT
1575                 {
1576                         $$ = make_node(scanner, NODE_VARIANT);
1577                         $$->u.variant.has_body = 0;
1578                         $$->u.variant.name = $1->s;
1579                         $$->u.variant.choice = $3->s;
1580                 }
1581         |       ID_TYPE LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1582                 {
1583                         $$ = make_node(scanner, NODE_VARIANT);
1584                         $$->u.variant.has_body = 1;
1585                         $$->u.variant.name = $1->s;
1586                         $$->u.variant.choice = $3->s;
1587                         if (set_parent_node($6, $$))
1588                                 reparent_error(scanner, "variant reparent error");
1589                 }
1590         |       ID_TYPE LT ID_TYPE GT
1591                 {
1592                         $$ = make_node(scanner, NODE_VARIANT);
1593                         $$->u.variant.has_body = 0;
1594                         $$->u.variant.name = $1->s;
1595                         $$->u.variant.choice = $3->s;
1596                 }
1597         ;
1598
1599 variant_declaration_begin:
1600                 LBRAC
1601                 {       push_scope(scanner);    }
1602         ;
1603
1604 variant_declaration_end:
1605                 RBRAC
1606                 {       pop_scope(scanner);     }
1607         ;
1608
1609 declaration_specifiers_or_integer_constant:
1610                 declaration_specifiers
1611                 {       $$ = $1;                }
1612         |       DECIMAL_CONSTANT
1613                 {
1614                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1615                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1616                         sscanf(yylval.gs->s, "%" PRIu64,
1617                                &$$->u.unary_expression.u.unsigned_constant);
1618                 }
1619         |       OCTAL_CONSTANT
1620                 {
1621                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1622                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1623                         sscanf(yylval.gs->s, "0%" PRIo64,
1624                                &$$->u.unary_expression.u.unsigned_constant);
1625                 }
1626         |       HEXADECIMAL_CONSTANT
1627                 {
1628                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1629                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1630                         sscanf(yylval.gs->s, "0x%" PRIx64,
1631                                &$$->u.unary_expression.u.unsigned_constant);
1632                 }
1633         ;
1634
1635 enum_type_specifier:
1636                 LBRAC enumerator_list RBRAC
1637                 {
1638                         $$ = make_node(scanner, NODE_ENUM);
1639                         $$->u._enum.has_body = 1;
1640                         _cds_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
1641                 }
1642         |       LT declaration_specifiers GT LBRAC enumerator_list RBRAC
1643                 {
1644                         $$ = make_node(scanner, NODE_ENUM);
1645                         $$->u._enum.has_body = 1;
1646                         ($$)->u._enum.container_type = $2;
1647                         _cds_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
1648                 }
1649         |       IDENTIFIER LBRAC enumerator_list RBRAC
1650                 {
1651                         $$ = make_node(scanner, NODE_ENUM);
1652                         $$->u._enum.has_body = 1;
1653                         $$->u._enum.enum_id = $1->s;
1654                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1655                 }
1656         |       IDENTIFIER LT declaration_specifiers GT LBRAC enumerator_list RBRAC
1657                 {
1658                         $$ = make_node(scanner, NODE_ENUM);
1659                         $$->u._enum.has_body = 1;
1660                         $$->u._enum.enum_id = $1->s;
1661                         ($$)->u._enum.container_type = $3;
1662                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u._enum.enumerator_list);
1663                 }
1664         |       ID_TYPE LBRAC enumerator_list RBRAC
1665                 {
1666                         $$ = make_node(scanner, NODE_ENUM);
1667                         $$->u._enum.has_body = 1;
1668                         $$->u._enum.enum_id = $1->s;
1669                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1670                 }
1671         |       ID_TYPE LT declaration_specifiers GT LBRAC enumerator_list RBRAC
1672                 {
1673                         $$ = make_node(scanner, NODE_ENUM);
1674                         $$->u._enum.has_body = 1;
1675                         $$->u._enum.enum_id = $1->s;
1676                         ($$)->u._enum.container_type = $3;
1677                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u._enum.enumerator_list);
1678                 }
1679         |       LBRAC enumerator_list COMMA RBRAC
1680                 {
1681                         $$ = make_node(scanner, NODE_ENUM);
1682                         $$->u._enum.has_body = 1;
1683                         _cds_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
1684                 }
1685         |       LT declaration_specifiers GT LBRAC enumerator_list COMMA RBRAC
1686                 {
1687                         $$ = make_node(scanner, NODE_ENUM);
1688                         $$->u._enum.has_body = 1;
1689                         ($$)->u._enum.container_type = $2;
1690                         _cds_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
1691                 }
1692         |       IDENTIFIER LBRAC enumerator_list COMMA RBRAC
1693                 {
1694                         $$ = make_node(scanner, NODE_ENUM);
1695                         $$->u._enum.has_body = 1;
1696                         $$->u._enum.enum_id = $1->s;
1697                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1698                 }
1699         |       IDENTIFIER LT declaration_specifiers GT LBRAC enumerator_list COMMA RBRAC
1700                 {
1701                         $$ = make_node(scanner, NODE_ENUM);
1702                         $$->u._enum.has_body = 1;
1703                         $$->u._enum.enum_id = $1->s;
1704                         ($$)->u._enum.container_type = $3;
1705                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u._enum.enumerator_list);
1706                 }
1707         |       IDENTIFIER
1708                 {
1709                         $$ = make_node(scanner, NODE_ENUM);
1710                         $$->u._enum.has_body = 0;
1711                         $$->u._enum.enum_id = $1->s;
1712                 }
1713         |       IDENTIFIER LT declaration_specifiers GT
1714                 {
1715                         $$ = make_node(scanner, NODE_ENUM);
1716                         $$->u._enum.has_body = 0;
1717                         $$->u._enum.enum_id = $1->s;
1718                         ($$)->u._enum.container_type = $3;
1719                 }
1720         |       ID_TYPE LBRAC enumerator_list COMMA RBRAC
1721                 {
1722                         $$ = make_node(scanner, NODE_ENUM);
1723                         $$->u._enum.has_body = 1;
1724                         $$->u._enum.enum_id = $1->s;
1725                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1726                 }
1727         |       ID_TYPE LT declaration_specifiers GT LBRAC enumerator_list COMMA RBRAC
1728                 {
1729                         $$ = make_node(scanner, NODE_ENUM);
1730                         $$->u._enum.has_body = 1;
1731                         $$->u._enum.enum_id = $1->s;
1732                         ($$)->u._enum.container_type = $3;
1733                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u._enum.enumerator_list);
1734                 }
1735         |       ID_TYPE
1736                 {
1737                         $$ = make_node(scanner, NODE_ENUM);
1738                         $$->u._enum.has_body = 0;
1739                         $$->u._enum.enum_id = $1->s;
1740                 }
1741         |       ID_TYPE LT declaration_specifiers GT
1742                 {
1743                         $$ = make_node(scanner, NODE_ENUM);
1744                         $$->u._enum.has_body = 0;
1745                         $$->u._enum.enum_id = $1->s;
1746                         ($$)->u._enum.container_type = $3;
1747                 }
1748         ;
1749
1750 struct_or_variant_declaration_list:
1751                 /* empty */
1752                 {       $$ = NULL;      }
1753         |       struct_or_variant_declaration_list struct_or_variant_declaration
1754                 {
1755                         if ($1) {
1756                                 $$ = $1;
1757                                 cds_list_add_tail(&($2)->siblings, &($$)->tmp_head);
1758                         } else {
1759                                 $$ = $2;
1760                                 cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1761                         }
1762                 }
1763         ;
1764
1765 struct_or_variant_declaration:
1766                 declaration_specifiers struct_or_variant_declarator_list SEMICOLON
1767                 {
1768                         struct ctf_node *list;
1769
1770                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1771                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1772                         $$ = make_node(scanner, NODE_STRUCT_OR_VARIANT_DECLARATION);
1773                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
1774                         _cds_list_splice_tail(&($2)->tmp_head, &($$)->u.struct_or_variant_declaration.type_declarators);
1775                 }
1776         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1777                 {
1778                         struct ctf_node *list;
1779
1780                         $$ = make_node(scanner, NODE_TYPEDEF);
1781                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1782                         $$->u._typedef.type_specifier_list = list;
1783                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1784                         _cds_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1785                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
1786                 }
1787         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1788                 {
1789                         struct ctf_node *list;
1790
1791                         $$ = make_node(scanner, NODE_TYPEDEF);
1792                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1793                         $$->u._typedef.type_specifier_list = list;
1794                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1795                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1796                 }
1797         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
1798                 {
1799                         struct ctf_node *list;
1800
1801                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1802                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1803                         $$ = make_node(scanner, NODE_TYPEDEF);
1804                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
1805                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1806                 }
1807         |       TYPEALIAS declaration_specifiers abstract_declarator_list COLON alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
1808                 {
1809                         struct ctf_node *list;
1810
1811                         $$ = make_node(scanner, NODE_TYPEALIAS);
1812                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
1813                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
1814
1815                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1816                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
1817                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1818                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
1819
1820                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1821                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
1822                         _cds_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1823                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
1824                 }
1825         ;
1826
1827 alias_declaration_specifiers:
1828                 CONST
1829                 {
1830                         struct ctf_node *node;
1831
1832                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1833                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1834                         node->u.type_specifier.type = TYPESPEC_CONST;
1835                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1836                 }
1837         |       type_specifier
1838                 {
1839                         struct ctf_node *node;
1840
1841                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1842                         node = $1;
1843                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1844                 }
1845         |       IDENTIFIER
1846                 {
1847                         struct ctf_node *node;
1848
1849                         add_type(scanner, $1);
1850                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1851                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1852                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
1853                         node->u.type_specifier.id_type = yylval.gs->s;
1854                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1855                 }
1856         |       alias_declaration_specifiers CONST
1857                 {
1858                         struct ctf_node *node;
1859
1860                         $$ = $1;
1861                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1862                         node->u.type_specifier.type = TYPESPEC_CONST;
1863                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1864                 }
1865         |       alias_declaration_specifiers type_specifier
1866                 {
1867                         $$ = $1;
1868                         cds_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1869                 }
1870         |       alias_declaration_specifiers IDENTIFIER
1871                 {
1872                         struct ctf_node *node;
1873
1874                         add_type(scanner, $2);
1875                         $$ = $1;
1876                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1877                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
1878                         node->u.type_specifier.id_type = yylval.gs->s;
1879                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1880                 }
1881         ;
1882
1883 struct_or_variant_declarator_list:
1884                 struct_or_variant_declarator
1885                 {       $$ = $1;        }
1886         |       struct_or_variant_declarator_list COMMA struct_or_variant_declarator
1887                 {
1888                         $$ = $1;
1889                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1890                 }
1891         ;
1892
1893 struct_or_variant_declarator:
1894                 declarator
1895                 {       $$ = $1;        }
1896         |       COLON unary_expression
1897                 {       $$ = $2;        }
1898         |       declarator COLON unary_expression
1899                 {
1900                         $$ = $1;
1901                         if (set_parent_node($3, $1))
1902                                 reparent_error(scanner, "struct_or_variant_declarator");
1903                 }
1904         ;
1905
1906 enumerator_list:
1907                 enumerator
1908                 {       $$ = $1;        }
1909         |       enumerator_list COMMA enumerator
1910                 {
1911                         $$ = $1;
1912                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1913                 }
1914         ;
1915
1916 enumerator:
1917                 IDENTIFIER
1918                 {
1919                         $$ = make_node(scanner, NODE_ENUMERATOR);
1920                         $$->u.enumerator.id = $1->s;
1921                 }
1922         |       ID_TYPE
1923                 {
1924                         $$ = make_node(scanner, NODE_ENUMERATOR);
1925                         $$->u.enumerator.id = $1->s;
1926                 }
1927         |       keywords
1928                 {
1929                         $$ = make_node(scanner, NODE_ENUMERATOR);
1930                         $$->u.enumerator.id = $1->s;
1931                 }
1932         |       STRING_LITERAL_START DQUOTE
1933                 {
1934                         $$ = make_node(scanner, NODE_ENUMERATOR);
1935                         $$->u.enumerator.id = "";
1936                 }
1937         |       STRING_LITERAL_START s_char_sequence DQUOTE
1938                 {
1939                         $$ = make_node(scanner, NODE_ENUMERATOR);
1940                         $$->u.enumerator.id = $2->s;
1941                 }
1942         |       IDENTIFIER EQUAL unary_expression_or_range
1943                 {
1944                         $$ = make_node(scanner, NODE_ENUMERATOR);
1945                         $$->u.enumerator.id = $1->s;
1946                         cds_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
1947                 }
1948         |       ID_TYPE EQUAL unary_expression_or_range
1949                 {
1950                         $$ = make_node(scanner, NODE_ENUMERATOR);
1951                         $$->u.enumerator.id = $1->s;
1952                         cds_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
1953                 }
1954         |       keywords EQUAL unary_expression_or_range
1955                 {
1956                         $$ = make_node(scanner, NODE_ENUMERATOR);
1957                         $$->u.enumerator.id = $1->s;
1958                         cds_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
1959                 }
1960         |       STRING_LITERAL_START DQUOTE EQUAL unary_expression_or_range
1961                 {
1962                         $$ = make_node(scanner, NODE_ENUMERATOR);
1963                         $$->u.enumerator.id = "";
1964                         cds_list_splice(&($4)->tmp_head, &($$)->u.enumerator.values);
1965                 }
1966         |       STRING_LITERAL_START s_char_sequence DQUOTE EQUAL unary_expression_or_range
1967                 {
1968                         $$ = make_node(scanner, NODE_ENUMERATOR);
1969                         $$->u.enumerator.id = $2->s;
1970                         cds_list_splice(&($5)->tmp_head, &($$)->u.enumerator.values);
1971                 }
1972         ;
1973
1974 abstract_declarator_list:
1975                 abstract_declarator
1976                 {       $$ = $1;        }
1977         |       abstract_declarator_list COMMA abstract_declarator
1978                 {
1979                         $$ = $1;
1980                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1981                 }
1982         ;
1983
1984 abstract_declarator:
1985                 direct_abstract_declarator
1986                 {       $$ = $1;        }
1987         |       pointer direct_abstract_declarator
1988                 {
1989                         $$ = $2;
1990                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
1991                 }
1992         ;
1993
1994 direct_abstract_declarator:
1995                 /* empty */
1996                 {
1997                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
1998                         $$->u.type_declarator.type = TYPEDEC_ID;
1999                         /* id is NULL */
2000                 }
2001         |       IDENTIFIER
2002                 {
2003                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2004                         $$->u.type_declarator.type = TYPEDEC_ID;
2005                         $$->u.type_declarator.u.id = $1->s;
2006                 }
2007         |       LPAREN abstract_declarator RPAREN
2008                 {
2009                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2010                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2011                         $$->u.type_declarator.u.nested.type_declarator = $2;
2012                 }
2013         |       direct_abstract_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2014                 {
2015                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2016                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2017                         $$->u.type_declarator.u.nested.type_declarator = $1;
2018                         ($$)->u.type_declarator.u.nested.length = $3;
2019                 }
2020         |       direct_abstract_declarator LSBRAC RSBRAC
2021                 {
2022                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2023                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2024                         $$->u.type_declarator.u.nested.type_declarator = $1;
2025                         $$->u.type_declarator.u.nested.abstract_array = 1;
2026                 }
2027         ;
2028
2029 alias_abstract_declarator_list:
2030                 alias_abstract_declarator
2031                 {       $$ = $1;        }
2032         |       alias_abstract_declarator_list COMMA alias_abstract_declarator
2033                 {
2034                         $$ = $1;
2035                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2036                 }
2037         ;
2038
2039 alias_abstract_declarator:
2040                 direct_alias_abstract_declarator
2041                 {       $$ = $1;        }
2042         |       pointer direct_alias_abstract_declarator
2043                 {
2044                         $$ = $2;
2045                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2046                 }
2047         ;
2048
2049 direct_alias_abstract_declarator:
2050                 /* empty */
2051                 {
2052                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2053                         $$->u.type_declarator.type = TYPEDEC_ID;
2054                         /* id is NULL */
2055                 }
2056         |       LPAREN alias_abstract_declarator RPAREN
2057                 {
2058                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2059                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2060                         $$->u.type_declarator.u.nested.type_declarator = $2;
2061                 }
2062         |       direct_alias_abstract_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2063                 {
2064                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2065                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2066                         $$->u.type_declarator.u.nested.type_declarator = $1;
2067                         ($$)->u.type_declarator.u.nested.length = $3;
2068                 }
2069         |       direct_alias_abstract_declarator LSBRAC RSBRAC
2070                 {
2071                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2072                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2073                         $$->u.type_declarator.u.nested.type_declarator = $1;
2074                         $$->u.type_declarator.u.nested.abstract_array = 1;
2075                 }
2076         ;
2077
2078 declarator:
2079                 direct_declarator
2080                 {       $$ = $1;        }
2081         |       pointer direct_declarator
2082                 {
2083                         $$ = $2;
2084                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2085                 }
2086         ;
2087
2088 direct_declarator:
2089                 IDENTIFIER
2090                 {
2091                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2092                         $$->u.type_declarator.type = TYPEDEC_ID;
2093                         $$->u.type_declarator.u.id = $1->s;
2094                 }
2095         |       LPAREN declarator RPAREN
2096                 {
2097                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2098                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2099                         $$->u.type_declarator.u.nested.type_declarator = $2;
2100                 }
2101         |       direct_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2102                 {
2103                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2104                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2105                         $$->u.type_declarator.u.nested.type_declarator = $1;
2106                         ($$)->u.type_declarator.u.nested.length = $3;
2107                 }
2108         ;
2109
2110 type_declarator:
2111                 direct_type_declarator
2112                 {       $$ = $1;        }
2113         |       pointer direct_type_declarator
2114                 {
2115                         $$ = $2;
2116                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2117                 }
2118         ;
2119
2120 direct_type_declarator:
2121                 IDENTIFIER
2122                 {
2123                         add_type(scanner, $1);
2124                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2125                         $$->u.type_declarator.type = TYPEDEC_ID;
2126                         $$->u.type_declarator.u.id = $1->s;
2127                 }
2128         |       LPAREN type_declarator RPAREN
2129                 {
2130                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2131                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2132                         $$->u.type_declarator.u.nested.type_declarator = $2;
2133                 }
2134         |       direct_type_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2135                 {
2136                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2137                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2138                         $$->u.type_declarator.u.nested.type_declarator = $1;
2139                         ($$)->u.type_declarator.u.nested.length = $3;
2140                 }
2141         ;
2142
2143 pointer:
2144                 STAR
2145                 {
2146                         $$ = make_node(scanner, NODE_POINTER);
2147                 }
2148         |       STAR pointer
2149                 {
2150                         $$ = make_node(scanner, NODE_POINTER);
2151                         cds_list_splice(&($2)->tmp_head, &($$)->tmp_head);
2152                 }
2153         |       STAR type_qualifier_list pointer
2154                 {
2155                         $$ = make_node(scanner, NODE_POINTER);
2156                         $$->u.pointer.const_qualifier = 1;
2157                         cds_list_splice(&($3)->tmp_head, &($$)->tmp_head);
2158                 }
2159         ;
2160
2161 type_qualifier_list:
2162                 /* pointer assumes only const type qualifier */
2163                 CONST
2164         |       type_qualifier_list CONST
2165         ;
2166
2167 /* 2.3: CTF-specific declarations */
2168
2169 ctf_assignment_expression_list:
2170                 ctf_assignment_expression SEMICOLON
2171                 {       $$ = $1;        }
2172         |       ctf_assignment_expression_list ctf_assignment_expression SEMICOLON
2173                 {
2174                         $$ = $1;
2175                         cds_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2176                 }
2177         ;
2178
2179 ctf_assignment_expression:
2180                 unary_expression EQUAL unary_expression
2181                 {
2182                         /*
2183                          * Because we have left and right, cannot use
2184                          * set_parent_node.
2185                          */
2186                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2187                         _cds_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2188                         if ($1->u.unary_expression.type != UNARY_STRING)
2189                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2190                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.ctf_expression.right);
2191                 }
2192         |       unary_expression TYPEASSIGN declaration_specifiers      /* Only allow struct */
2193                 {
2194                         /*
2195                          * Because we have left and right, cannot use
2196                          * set_parent_node.
2197                          */
2198                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2199                         _cds_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2200                         if ($1->u.unary_expression.type != UNARY_STRING)
2201                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2202                         cds_list_add_tail(&($3)->siblings, &($$)->u.ctf_expression.right);
2203                 }
2204         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list
2205                 {
2206                         struct ctf_node *list;
2207
2208                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2209                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2210                         _cds_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2211                         $$ = make_node(scanner, NODE_TYPEDEF);
2212                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2213                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2214                 }
2215         |       TYPEDEF declaration_specifiers type_declarator_list
2216                 {
2217                         struct ctf_node *list;
2218
2219                         $$ = make_node(scanner, NODE_TYPEDEF);
2220                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2221                         $$->u._typedef.type_specifier_list = list;
2222                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2223                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2224                 }
2225         |       declaration_specifiers TYPEDEF type_declarator_list
2226                 {
2227                         struct ctf_node *list;
2228
2229                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2230                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2231                         $$ = make_node(scanner, NODE_TYPEDEF);
2232                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2233                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2234                 }
2235         |       TYPEALIAS declaration_specifiers abstract_declarator_list COLON alias_declaration_specifiers alias_abstract_declarator_list
2236                 {
2237                         struct ctf_node *list;
2238
2239                         $$ = make_node(scanner, NODE_TYPEALIAS);
2240                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2241                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2242
2243                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2244                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2245                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2246                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2247
2248                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2249                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2250                         _cds_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2251                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2252                 }
2253         ;