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 /*
 843  * Expect two shift-reduce conflicts. Caused by enum name-opt : type {}
 844  * vs struct { int :value; } (unnamed bit-field). The default is to
 845  * shift, so whenever we encounter an enumeration, we are doing the
 846  * proper thing (shift). It is illegal to declare an enumeration
 847  * "bit-field", so it is OK if this situation ends up in a parsing
 848  * error.
 849  */
 850 %expect 2
 851 %start file
 852 %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
 853 %token <gs> IDENTIFIER ID_TYPE
 854 %token ERROR
 855 %union
 856 {
 857         long long ll;
 858         char c;
 859         struct gc_string *gs;
 860         struct ctf_node *n;
 861 }
 862
 863 %type <gs> keywords
 864 %type <gs> s_char s_char_sequence c_char c_char_sequence
 865
 866 %type <n> postfix_expression unary_expression unary_expression_or_range
 867
 868 %type <n> declaration
 869 %type <n> event_declaration
 870 %type <n> stream_declaration
 871 %type <n> trace_declaration
 872 %type <n> integer_declaration_specifiers
 873 %type <n> declaration_specifiers
 874 %type <n> alias_declaration_specifiers
 875
 876 %type <n> type_declarator_list
 877 %type <n> integer_type_specifier
 878 %type <n> type_specifier
 879 %type <n> struct_type_specifier
 880 %type <n> variant_type_specifier
 881 %type <n> declaration_specifiers_or_integer_constant
 882 %type <n> enum_type_specifier
 883 %type <n> struct_or_variant_declaration_list
 884 %type <n> struct_or_variant_declaration
 885 %type <n> struct_or_variant_declarator_list
 886 %type <n> struct_or_variant_declarator
 887 %type <n> enumerator_list
 888 %type <n> enumerator
 889 %type <n> abstract_declarator_list
 890 %type <n> abstract_declarator
 891 %type <n> direct_abstract_declarator
 892 %type <n> alias_abstract_declarator_list
 893 %type <n> alias_abstract_declarator
 894 %type <n> direct_alias_abstract_declarator
 895 %type <n> declarator
 896 %type <n> direct_declarator
 897 %type <n> type_declarator
 898 %type <n> direct_type_declarator
 899 %type <n> pointer
 900 %type <n> ctf_assignment_expression_list
 901 %type <n> ctf_assignment_expression
 902
 903 %%
 904
 905 file:
 906                 declaration
 907                 {
 908                         if (set_parent_node($1, &ctf_scanner_get_ast(scanner)->root))
 909                                 reparent_error(scanner, "error reparenting to root");
 910                 }
 911         |       file declaration
 912                 {
 913                         if (set_parent_node($2, &ctf_scanner_get_ast(scanner)->root))
 914                                 reparent_error(scanner, "error reparenting to root");
 915                 }
 916         ;
 917
 918 keywords:
 919                 VOID
 920                 {       $$ = yylval.gs;         }
 921         |       CHAR
 922                 {       $$ = yylval.gs;         }
 923         |       SHORT
 924                 {       $$ = yylval.gs;         }
 925         |       INT
 926                 {       $$ = yylval.gs;         }
 927         |       LONG
 928                 {       $$ = yylval.gs;         }
 929         |       FLOAT
 930                 {       $$ = yylval.gs;         }
 931         |       DOUBLE
 932                 {       $$ = yylval.gs;         }
 933         |       SIGNED
 934                 {       $$ = yylval.gs;         }
 935         |       UNSIGNED
 936                 {       $$ = yylval.gs;         }
 937         |       _BOOL
 938                 {       $$ = yylval.gs;         }
 939         |       _COMPLEX
 940                 {       $$ = yylval.gs;         }
 941         |       _IMAGINARY
 942                 {       $$ = yylval.gs;         }
 943         |       FLOATING_POINT
 944                 {       $$ = yylval.gs;         }
 945         |       INTEGER
 946                 {       $$ = yylval.gs;         }
 947         |       STRING
 948                 {       $$ = yylval.gs;         }
 949         |       ENUM
 950                 {       $$ = yylval.gs;         }
 951         |       VARIANT
 952                 {       $$ = yylval.gs;         }
 953         |       STRUCT
 954                 {       $$ = yylval.gs;         }
 955         |       CONST
 956                 {       $$ = yylval.gs;         }
 957         |       TYPEDEF
 958                 {       $$ = yylval.gs;         }
 959         |       EVENT
 960                 {       $$ = yylval.gs;         }
 961         |       STREAM
 962                 {       $$ = yylval.gs;         }
 963         |       TRACE
 964                 {       $$ = yylval.gs;         }
 965         ;
 966
 967 /* 1.5 Constants */
 968
 969 c_char_sequence:
 970                 c_char
 971                 {       $$ = $1;                                        }
 972         |       c_char_sequence c_char
 973                 {       $$ = gc_string_append(scanner, $1, $2);         }
 974         ;
 975
 976 c_char:
 977                 CHAR_STRING_TOKEN
 978                 {       $$ = yylval.gs;                                 }
 979         |       ESCSEQ
 980                 {
 981                         reparent_error(scanner, "escape sequences not supported yet");
 982                 }
 983         ;
 984
 985 /* 1.6 String literals */
 986
 987 s_char_sequence:
 988                 s_char
 989                 {       $$ = $1;                                        }
 990         |       s_char_sequence s_char
 991                 {       $$ = gc_string_append(scanner, $1, $2);         }
 992         ;
 993
 994 s_char:
 995                 CHAR_STRING_TOKEN
 996                 {       $$ = yylval.gs;                                 }
 997         |       ESCSEQ
 998                 {
 999                         reparent_error(scanner, "escape sequences not supported yet");
1000                 }
1001         ;
1002
1003 /* 2: Phrase structure grammar */
1004
1005 postfix_expression:
1006                 IDENTIFIER
1007                 {
1008                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1009                         $$->u.unary_expression.type = UNARY_STRING;
1010                         $$->u.unary_expression.u.string = yylval.gs->s;
1011                 }
1012         |       ID_TYPE
1013                 {
1014                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1015                         $$->u.unary_expression.type = UNARY_STRING;
1016                         $$->u.unary_expression.u.string = yylval.gs->s;
1017                 }
1018         |       keywords
1019                 {
1020                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1021                         $$->u.unary_expression.type = UNARY_STRING;
1022                         $$->u.unary_expression.u.string = yylval.gs->s;
1023                 }
1024         |       DECIMAL_CONSTANT
1025                 {
1026                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1027                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1028                         sscanf(yylval.gs->s, "%" PRIu64,
1029                                &$$->u.unary_expression.u.unsigned_constant);
1030                 }
1031         |       OCTAL_CONSTANT
1032                 {
1033                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1034                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1035                         sscanf(yylval.gs->s, "0%" PRIo64,
1036                                &$$->u.unary_expression.u.unsigned_constant);
1037                 }
1038         |       HEXADECIMAL_CONSTANT
1039                 {
1040                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1041                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1042                         sscanf(yylval.gs->s, "0x%" PRIx64,
1043                                &$$->u.unary_expression.u.unsigned_constant);
1044                 }
1045         |       STRING_LITERAL_START DQUOTE
1046                 {
1047                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1048                         $$->u.unary_expression.type = UNARY_STRING;
1049                         $$->u.unary_expression.u.string = "";
1050                 }
1051         |       STRING_LITERAL_START s_char_sequence DQUOTE
1052                 {
1053                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1054                         $$->u.unary_expression.type = UNARY_STRING;
1055                         $$->u.unary_expression.u.string = $2->s;
1056                 }
1057         |       CHARACTER_CONSTANT_START c_char_sequence SQUOTE
1058                 {
1059                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1060                         $$->u.unary_expression.type = UNARY_STRING;
1061                         $$->u.unary_expression.u.string = $2->s;
1062                 }
1063         |       LPAREN unary_expression RPAREN
1064                 {
1065                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1066                         $$->u.unary_expression.type = UNARY_NESTED;
1067                         $$->u.unary_expression.u.nested_exp = $2;
1068                 }
1069         |       postfix_expression LSBRAC unary_expression RSBRAC
1070                 {
1071                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1072                         $$->u.unary_expression.type = UNARY_SBRAC;
1073                         $$->u.unary_expression.u.sbrac_exp = $3;
1074                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1075                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1076                 }
1077         |       postfix_expression DOT IDENTIFIER
1078                 {
1079                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1080                         $$->u.unary_expression.type = UNARY_STRING;
1081                         $$->u.unary_expression.u.string = yylval.gs->s;
1082                         $$->u.unary_expression.link = UNARY_DOTLINK;
1083                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1084                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1085                 }
1086         |       postfix_expression DOT ID_TYPE
1087                 {
1088                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1089                         $$->u.unary_expression.type = UNARY_STRING;
1090                         $$->u.unary_expression.u.string = yylval.gs->s;
1091                         $$->u.unary_expression.link = UNARY_DOTLINK;
1092                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1093                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1094                 }
1095         |       postfix_expression RARROW IDENTIFIER
1096                 {
1097                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1098                         $$->u.unary_expression.type = UNARY_STRING;
1099                         $$->u.unary_expression.u.string = yylval.gs->s;
1100                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1101                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1102                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1103                 }
1104         |       postfix_expression RARROW ID_TYPE
1105                 {
1106                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1107                         $$->u.unary_expression.type = UNARY_STRING;
1108                         $$->u.unary_expression.u.string = yylval.gs->s;
1109                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1110                         cds_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1111                         cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1112                 }
1113         ;
1114
1115 unary_expression:
1116                 postfix_expression
1117                 {       $$ = $1;                                }
1118         |       PLUS postfix_expression
1119                 {       $$ = $2;                                }
1120         |       MINUS postfix_expression
1121                 {
1122                         $$ = $2;
1123                         if ($$->u.unary_expression.type != UNARY_SIGNED_CONSTANT
1124                                 && $$->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT)
1125                                 reparent_error(scanner, "expecting numeric constant");
1126
1127                         if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1128                                 $$->u.unary_expression.type = UNARY_SIGNED_CONSTANT;
1129                                 $$->u.unary_expression.u.signed_constant =
1130                                         -($$->u.unary_expression.u.unsigned_constant);
1131                         } else {
1132                                 $$->u.unary_expression.u.signed_constant =
1133                                         -($$->u.unary_expression.u.signed_constant);
1134                         }
1135                 }
1136         ;
1137
1138 unary_expression_or_range:
1139                 unary_expression DOTDOTDOT unary_expression
1140                 {
1141                         $$ = $1;
1142                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->tmp_head);
1143                         $3->u.unary_expression.link = UNARY_DOTDOTDOT;
1144                 }
1145         |       unary_expression
1146                 {       $$ = $1;                }
1147         ;
1148
1149 /* 2.2: Declarations */
1150
1151 declaration:
1152                 declaration_specifiers SEMICOLON
1153                 {       $$ = $1;        }
1154         |       event_declaration
1155                 {       $$ = $1;        }
1156         |       stream_declaration
1157                 {       $$ = $1;        }
1158         |       trace_declaration
1159                 {       $$ = $1;        }
1160         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1161                 {
1162                         struct ctf_node *list;
1163
1164                         $$ = make_node(scanner, NODE_TYPEDEF);
1165                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1166                         $$->u._typedef.type_specifier_list = list;
1167                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1168                         _cds_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1169                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
1170                 }
1171         |       TYPEDEF declaration_specifiers 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(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1179                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1180                 }
1181         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
1182                 {
1183                         struct ctf_node *list;
1184
1185                         $$ = make_node(scanner, NODE_TYPEDEF);
1186                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1187                         $$->u._typedef.type_specifier_list = list;
1188                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1189                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1190                 }
1191         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
1192                 {
1193                         struct ctf_node *list;
1194
1195                         $$ = make_node(scanner, NODE_TYPEALIAS);
1196                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
1197                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
1198
1199                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1200                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
1201                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1202                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
1203
1204                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1205                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
1206                         _cds_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1207                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
1208                 }
1209         ;
1210
1211 event_declaration:
1212                 event_declaration_begin event_declaration_end
1213                 {
1214                         $$ = make_node(scanner, NODE_EVENT);
1215                 }
1216         |       event_declaration_begin ctf_assignment_expression_list event_declaration_end
1217                 {
1218                         $$ = make_node(scanner, NODE_EVENT);
1219                         if (set_parent_node($2, $$))
1220                                 reparent_error(scanner, "event_declaration");
1221                 }
1222         ;
1223
1224 event_declaration_begin:
1225                 EVENT LBRAC
1226                 {       push_scope(scanner);    }
1227         ;
1228
1229 event_declaration_end:
1230                 RBRAC SEMICOLON
1231                 {       pop_scope(scanner);     }
1232         ;
1233
1234
1235 stream_declaration:
1236                 stream_declaration_begin stream_declaration_end
1237                 {
1238                         $$ = make_node(scanner, NODE_STREAM);
1239                 }
1240         |       stream_declaration_begin ctf_assignment_expression_list stream_declaration_end
1241                 {
1242                         $$ = make_node(scanner, NODE_STREAM);
1243                         if (set_parent_node($2, $$))
1244                                 reparent_error(scanner, "stream_declaration");
1245                 }
1246         ;
1247
1248 stream_declaration_begin:
1249                 STREAM LBRAC
1250                 {       push_scope(scanner);    }
1251         ;
1252
1253 stream_declaration_end:
1254                 RBRAC SEMICOLON
1255                 {       pop_scope(scanner);     }
1256         ;
1257
1258
1259 trace_declaration:
1260                 trace_declaration_begin trace_declaration_end
1261                 {
1262                         $$ = make_node(scanner, NODE_TRACE);
1263                 }
1264         |       trace_declaration_begin ctf_assignment_expression_list trace_declaration_end
1265                 {
1266                         $$ = make_node(scanner, NODE_TRACE);
1267                         if (set_parent_node($2, $$))
1268                                 reparent_error(scanner, "trace_declaration");
1269                 }
1270         ;
1271
1272 trace_declaration_begin:
1273                 TRACE LBRAC
1274                 {       push_scope(scanner);    }
1275         ;
1276
1277 trace_declaration_end:
1278                 RBRAC SEMICOLON
1279                 {       pop_scope(scanner);     }
1280         ;
1281
1282 integer_declaration_specifiers:
1283                 CONST
1284                 {
1285                         struct ctf_node *node;
1286
1287                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1288                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1289                         node->u.type_specifier.type = TYPESPEC_CONST;
1290                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1291                 }
1292         |       integer_type_specifier
1293                 {
1294                         struct ctf_node *node;
1295
1296                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1297                         node = $1;
1298                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1299                 }
1300         |       integer_declaration_specifiers CONST
1301                 {
1302                         struct ctf_node *node;
1303
1304                         $$ = $1;
1305                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1306                         node->u.type_specifier.type = TYPESPEC_CONST;
1307                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1308                 }
1309         |       integer_declaration_specifiers integer_type_specifier
1310                 {
1311                         $$ = $1;
1312                         cds_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1313                 }
1314         ;
1315
1316 declaration_specifiers:
1317                 CONST
1318                 {
1319                         struct ctf_node *node;
1320
1321                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1322                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1323                         node->u.type_specifier.type = TYPESPEC_CONST;
1324                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1325                 }
1326         |       type_specifier
1327                 {
1328                         struct ctf_node *node;
1329
1330                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1331                         node = $1;
1332                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1333                 }
1334         |       declaration_specifiers CONST
1335                 {
1336                         struct ctf_node *node;
1337
1338                         $$ = $1;
1339                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1340                         node->u.type_specifier.type = TYPESPEC_CONST;
1341                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1342                 }
1343         |       declaration_specifiers type_specifier
1344                 {
1345                         $$ = $1;
1346                         cds_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1347                 }
1348         ;
1349
1350 type_declarator_list:
1351                 type_declarator
1352                 {       $$ = $1;        }
1353         |       type_declarator_list COMMA type_declarator
1354                 {
1355                         $$ = $1;
1356                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1357                 }
1358         ;
1359
1360 integer_type_specifier:
1361                 CHAR
1362                 {
1363                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1364                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1365                 }
1366         |       SHORT
1367                 {
1368                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1369                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1370                 }
1371         |       INT
1372                 {
1373                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1374                         $$->u.type_specifier.type = TYPESPEC_INT;
1375                 }
1376         |       LONG
1377                 {
1378                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1379                         $$->u.type_specifier.type = TYPESPEC_LONG;
1380                 }
1381         |       SIGNED
1382                 {
1383                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1384                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1385                 }
1386         |       UNSIGNED
1387                 {
1388                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1389                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1390                 }
1391         |       _BOOL
1392                 {
1393                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1394                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1395                 }
1396         |       ID_TYPE
1397                 {
1398                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1399                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1400                         $$->u.type_specifier.id_type = yylval.gs->s;
1401                 }
1402         |       INTEGER LBRAC RBRAC
1403                 {
1404                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1405                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1406                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1407                 }
1408         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1409                 {
1410                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1411                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1412                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1413                         if (set_parent_node($3, $$->u.type_specifier.node))
1414                                 reparent_error(scanner, "integer reparent error");
1415                 }
1416         ;
1417
1418 type_specifier:
1419                 VOID
1420                 {
1421                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1422                         $$->u.type_specifier.type = TYPESPEC_VOID;
1423                 }
1424         |       CHAR
1425                 {
1426                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1427                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1428                 }
1429         |       SHORT
1430                 {
1431                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1432                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1433                 }
1434         |       INT
1435                 {
1436                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1437                         $$->u.type_specifier.type = TYPESPEC_INT;
1438                 }
1439         |       LONG
1440                 {
1441                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1442                         $$->u.type_specifier.type = TYPESPEC_LONG;
1443                 }
1444         |       FLOAT
1445                 {
1446                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1447                         $$->u.type_specifier.type = TYPESPEC_FLOAT;
1448                 }
1449         |       DOUBLE
1450                 {
1451                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1452                         $$->u.type_specifier.type = TYPESPEC_DOUBLE;
1453                 }
1454         |       SIGNED
1455                 {
1456                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1457                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1458                 }
1459         |       UNSIGNED
1460                 {
1461                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1462                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1463                 }
1464         |       _BOOL
1465                 {
1466                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1467                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1468                 }
1469         |       _COMPLEX
1470                 {
1471                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1472                         $$->u.type_specifier.type = TYPESPEC_COMPLEX;
1473                 }
1474         |       _IMAGINARY
1475                 {
1476                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1477                         $$->u.type_specifier.type = TYPESPEC_IMAGINARY;
1478                 }
1479         |       ID_TYPE
1480                 {
1481                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1482                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1483                         $$->u.type_specifier.id_type = yylval.gs->s;
1484                 }
1485         |       FLOATING_POINT LBRAC RBRAC
1486                 {
1487                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1488                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1489                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1490                 }
1491         |       FLOATING_POINT LBRAC ctf_assignment_expression_list RBRAC
1492                 {
1493                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1494                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1495                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1496                         if (set_parent_node($3, $$->u.type_specifier.node))
1497                                 reparent_error(scanner, "floating point reparent error");
1498                 }
1499         |       INTEGER LBRAC RBRAC
1500                 {
1501                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1502                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1503                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1504                 }
1505         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1506                 {
1507                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1508                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1509                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1510                         if (set_parent_node($3, $$->u.type_specifier.node))
1511                                 reparent_error(scanner, "integer reparent error");
1512                 }
1513         |       STRING LBRAC RBRAC
1514                 {
1515                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1516                         $$->u.type_specifier.type = TYPESPEC_STRING;
1517                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1518                 }
1519         |       STRING LBRAC ctf_assignment_expression_list RBRAC
1520                 {
1521                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1522                         $$->u.type_specifier.type = TYPESPEC_STRING;
1523                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1524                         if (set_parent_node($3, $$->u.type_specifier.node))
1525                                 reparent_error(scanner, "string reparent error");
1526                 }
1527         |       ENUM enum_type_specifier
1528                 {
1529                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1530                         $$->u.type_specifier.type = TYPESPEC_ENUM;
1531                         $$->u.type_specifier.node = $2;
1532                 }
1533         |       VARIANT variant_type_specifier
1534                 {
1535                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1536                         $$->u.type_specifier.type = TYPESPEC_VARIANT;
1537                         $$->u.type_specifier.node = $2;
1538                 }
1539         |       STRUCT struct_type_specifier
1540                 {
1541                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1542                         $$->u.type_specifier.type = TYPESPEC_STRUCT;
1543                         $$->u.type_specifier.node = $2;
1544                 }
1545         ;
1546
1547 struct_type_specifier:
1548                 struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1549                 {
1550                         $$ = make_node(scanner, NODE_STRUCT);
1551                         $$->u._struct.has_body = 1;
1552                         if ($2 && set_parent_node($2, $$))
1553                                 reparent_error(scanner, "struct reparent error");
1554                 }
1555         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1556                 {
1557                         $$ = make_node(scanner, NODE_STRUCT);
1558                         $$->u._struct.has_body = 1;
1559                         $$->u._struct.name = $1->s;
1560                         if ($3 && set_parent_node($3, $$))
1561                                 reparent_error(scanner, "struct reparent error");
1562                 }
1563         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1564                 {
1565                         $$ = make_node(scanner, NODE_STRUCT);
1566                         $$->u._struct.has_body = 1;
1567                         $$->u._struct.name = $1->s;
1568                         if ($3 && set_parent_node($3, $$))
1569                                 reparent_error(scanner, "struct reparent error");
1570                 }
1571         |       IDENTIFIER
1572                 {
1573                         $$ = make_node(scanner, NODE_STRUCT);
1574                         $$->u._struct.has_body = 0;
1575                         $$->u._struct.name = $1->s;
1576                 }
1577         |       ID_TYPE
1578                 {
1579                         $$ = make_node(scanner, NODE_STRUCT);
1580                         $$->u._struct.has_body = 0;
1581                         $$->u._struct.name = $1->s;
1582                 }
1583         ;
1584
1585 struct_declaration_begin:
1586                 LBRAC
1587                 {       push_scope(scanner);    }
1588         ;
1589
1590 struct_declaration_end:
1591                 RBRAC
1592                 {       pop_scope(scanner);     }
1593         ;
1594
1595 variant_type_specifier:
1596                 variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1597                 {
1598                         $$ = make_node(scanner, NODE_VARIANT);
1599                         $$->u.variant.has_body = 1;
1600                         if ($2 && set_parent_node($2, $$))
1601                                 reparent_error(scanner, "variant reparent error");
1602                 }
1603         |       LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1604                 {
1605                         $$ = make_node(scanner, NODE_VARIANT);
1606                         $$->u.variant.has_body = 1;
1607                         $$->u.variant.choice = $2->s;
1608                         if ($5 && set_parent_node($5, $$))
1609                                 reparent_error(scanner, "variant reparent error");
1610                 }
1611         |       LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1612                 {
1613                         $$ = make_node(scanner, NODE_VARIANT);
1614                         $$->u.variant.has_body = 1;
1615                         $$->u.variant.choice = $2->s;
1616                         if ($5 && set_parent_node($5, $$))
1617                                 reparent_error(scanner, "variant reparent error");
1618                 }
1619         |       IDENTIFIER variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1620                 {
1621                         $$ = make_node(scanner, NODE_VARIANT);
1622                         $$->u.variant.has_body = 1;
1623                         $$->u.variant.name = $1->s;
1624                         if ($3 && set_parent_node($3, $$))
1625                                 reparent_error(scanner, "variant reparent error");
1626                 }
1627         |       IDENTIFIER LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1628                 {
1629                         $$ = make_node(scanner, NODE_VARIANT);
1630                         $$->u.variant.has_body = 1;
1631                         $$->u.variant.name = $1->s;
1632                         $$->u.variant.choice = $3->s;
1633                         if ($6 && set_parent_node($6, $$))
1634                                 reparent_error(scanner, "variant reparent error");
1635                 }
1636         |       IDENTIFIER LT IDENTIFIER GT
1637                 {
1638                         $$ = make_node(scanner, NODE_VARIANT);
1639                         $$->u.variant.has_body = 0;
1640                         $$->u.variant.name = $1->s;
1641                         $$->u.variant.choice = $3->s;
1642                 }
1643         |       IDENTIFIER LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1644                 {
1645                         $$ = make_node(scanner, NODE_VARIANT);
1646                         $$->u.variant.has_body = 1;
1647                         $$->u.variant.name = $1->s;
1648                         $$->u.variant.choice = $3->s;
1649                         if ($6 && set_parent_node($6, $$))
1650                                 reparent_error(scanner, "variant reparent error");
1651                 }
1652         |       IDENTIFIER LT ID_TYPE GT
1653                 {
1654                         $$ = make_node(scanner, NODE_VARIANT);
1655                         $$->u.variant.has_body = 0;
1656                         $$->u.variant.name = $1->s;
1657                         $$->u.variant.choice = $3->s;
1658                 }
1659         |       ID_TYPE variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1660                 {
1661                         $$ = make_node(scanner, NODE_VARIANT);
1662                         $$->u.variant.has_body = 1;
1663                         $$->u.variant.name = $1->s;
1664                         if ($3 && set_parent_node($3, $$))
1665                                 reparent_error(scanner, "variant reparent error");
1666                 }
1667         |       ID_TYPE LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1668                 {
1669                         $$ = make_node(scanner, NODE_VARIANT);
1670                         $$->u.variant.has_body = 1;
1671                         $$->u.variant.name = $1->s;
1672                         $$->u.variant.choice = $3->s;
1673                         if ($6 && set_parent_node($6, $$))
1674                                 reparent_error(scanner, "variant reparent error");
1675                 }
1676         |       ID_TYPE LT IDENTIFIER GT
1677                 {
1678                         $$ = make_node(scanner, NODE_VARIANT);
1679                         $$->u.variant.has_body = 0;
1680                         $$->u.variant.name = $1->s;
1681                         $$->u.variant.choice = $3->s;
1682                 }
1683         |       ID_TYPE LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1684                 {
1685                         $$ = make_node(scanner, NODE_VARIANT);
1686                         $$->u.variant.has_body = 1;
1687                         $$->u.variant.name = $1->s;
1688                         $$->u.variant.choice = $3->s;
1689                         if ($6 && set_parent_node($6, $$))
1690                                 reparent_error(scanner, "variant reparent error");
1691                 }
1692         |       ID_TYPE LT ID_TYPE GT
1693                 {
1694                         $$ = make_node(scanner, NODE_VARIANT);
1695                         $$->u.variant.has_body = 0;
1696                         $$->u.variant.name = $1->s;
1697                         $$->u.variant.choice = $3->s;
1698                 }
1699         ;
1700
1701 variant_declaration_begin:
1702                 LBRAC
1703                 {       push_scope(scanner);    }
1704         ;
1705
1706 variant_declaration_end:
1707                 RBRAC
1708                 {       pop_scope(scanner);     }
1709         ;
1710
1711 declaration_specifiers_or_integer_constant:
1712                 declaration_specifiers
1713                 {       $$ = $1;                }
1714         |       DECIMAL_CONSTANT
1715                 {
1716                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1717                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1718                         sscanf(yylval.gs->s, "%" PRIu64,
1719                                &$$->u.unary_expression.u.unsigned_constant);
1720                 }
1721         |       OCTAL_CONSTANT
1722                 {
1723                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1724                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1725                         sscanf(yylval.gs->s, "0%" PRIo64,
1726                                &$$->u.unary_expression.u.unsigned_constant);
1727                 }
1728         |       HEXADECIMAL_CONSTANT
1729                 {
1730                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1731                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1732                         sscanf(yylval.gs->s, "0x%" PRIx64,
1733                                &$$->u.unary_expression.u.unsigned_constant);
1734                 }
1735         ;
1736
1737 enum_type_specifier:
1738                 LBRAC enumerator_list RBRAC
1739                 {
1740                         $$ = make_node(scanner, NODE_ENUM);
1741                         $$->u._enum.has_body = 1;
1742                         _cds_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
1743                 }
1744         |       COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
1745                 {
1746                         $$ = make_node(scanner, NODE_ENUM);
1747                         $$->u._enum.has_body = 1;
1748                         ($$)->u._enum.container_type = $2;
1749                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
1750                 }
1751         |       IDENTIFIER LBRAC enumerator_list RBRAC
1752                 {
1753                         $$ = make_node(scanner, NODE_ENUM);
1754                         $$->u._enum.has_body = 1;
1755                         $$->u._enum.enum_id = $1->s;
1756                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1757                 }
1758         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
1759                 {
1760                         $$ = make_node(scanner, NODE_ENUM);
1761                         $$->u._enum.has_body = 1;
1762                         $$->u._enum.enum_id = $1->s;
1763                         ($$)->u._enum.container_type = $3;
1764                         _cds_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
1765                 }
1766         |       ID_TYPE LBRAC enumerator_list RBRAC
1767                 {
1768                         $$ = make_node(scanner, NODE_ENUM);
1769                         $$->u._enum.has_body = 1;
1770                         $$->u._enum.enum_id = $1->s;
1771                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1772                 }
1773         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
1774                 {
1775                         $$ = make_node(scanner, NODE_ENUM);
1776                         $$->u._enum.has_body = 1;
1777                         $$->u._enum.enum_id = $1->s;
1778                         ($$)->u._enum.container_type = $3;
1779                         _cds_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
1780                 }
1781         |       LBRAC enumerator_list COMMA RBRAC
1782                 {
1783                         $$ = make_node(scanner, NODE_ENUM);
1784                         $$->u._enum.has_body = 1;
1785                         _cds_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
1786                 }
1787         |       COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
1788                 {
1789                         $$ = make_node(scanner, NODE_ENUM);
1790                         $$->u._enum.has_body = 1;
1791                         ($$)->u._enum.container_type = $2;
1792                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
1793                 }
1794         |       IDENTIFIER LBRAC enumerator_list COMMA RBRAC
1795                 {
1796                         $$ = make_node(scanner, NODE_ENUM);
1797                         $$->u._enum.has_body = 1;
1798                         $$->u._enum.enum_id = $1->s;
1799                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1800                 }
1801         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
1802                 {
1803                         $$ = make_node(scanner, NODE_ENUM);
1804                         $$->u._enum.has_body = 1;
1805                         $$->u._enum.enum_id = $1->s;
1806                         ($$)->u._enum.container_type = $3;
1807                         _cds_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
1808                 }
1809         |       IDENTIFIER
1810                 {
1811                         $$ = make_node(scanner, NODE_ENUM);
1812                         $$->u._enum.has_body = 0;
1813                         $$->u._enum.enum_id = $1->s;
1814                 }
1815         |       ID_TYPE LBRAC enumerator_list COMMA RBRAC
1816                 {
1817                         $$ = make_node(scanner, NODE_ENUM);
1818                         $$->u._enum.has_body = 1;
1819                         $$->u._enum.enum_id = $1->s;
1820                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1821                 }
1822         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
1823                 {
1824                         $$ = make_node(scanner, NODE_ENUM);
1825                         $$->u._enum.has_body = 1;
1826                         $$->u._enum.enum_id = $1->s;
1827                         ($$)->u._enum.container_type = $3;
1828                         _cds_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
1829                 }
1830         |       ID_TYPE
1831                 {
1832                         $$ = make_node(scanner, NODE_ENUM);
1833                         $$->u._enum.has_body = 0;
1834                         $$->u._enum.enum_id = $1->s;
1835                 }
1836         ;
1837
1838 struct_or_variant_declaration_list:
1839                 /* empty */
1840                 {       $$ = NULL;      }
1841         |       struct_or_variant_declaration_list struct_or_variant_declaration
1842                 {
1843                         if ($1) {
1844                                 $$ = $1;
1845                                 cds_list_add_tail(&($2)->siblings, &($$)->tmp_head);
1846                         } else {
1847                                 $$ = $2;
1848                                 cds_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1849                         }
1850                 }
1851         ;
1852
1853 struct_or_variant_declaration:
1854                 declaration_specifiers struct_or_variant_declarator_list SEMICOLON
1855                 {
1856                         struct ctf_node *list;
1857
1858                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1859                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1860                         $$ = make_node(scanner, NODE_STRUCT_OR_VARIANT_DECLARATION);
1861                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
1862                         _cds_list_splice_tail(&($2)->tmp_head, &($$)->u.struct_or_variant_declaration.type_declarators);
1863                 }
1864         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1865                 {
1866                         struct ctf_node *list;
1867
1868                         $$ = make_node(scanner, NODE_TYPEDEF);
1869                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1870                         $$->u._typedef.type_specifier_list = list;
1871                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1872                         _cds_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1873                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
1874                 }
1875         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1876                 {
1877                         struct ctf_node *list;
1878
1879                         $$ = make_node(scanner, NODE_TYPEDEF);
1880                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1881                         $$->u._typedef.type_specifier_list = list;
1882                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1883                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1884                 }
1885         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
1886                 {
1887                         struct ctf_node *list;
1888
1889                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1890                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1891                         $$ = make_node(scanner, NODE_TYPEDEF);
1892                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
1893                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1894                 }
1895         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
1896                 {
1897                         struct ctf_node *list;
1898
1899                         $$ = make_node(scanner, NODE_TYPEALIAS);
1900                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
1901                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
1902
1903                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1904                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
1905                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1906                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
1907
1908                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1909                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
1910                         _cds_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1911                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
1912                 }
1913         ;
1914
1915 alias_declaration_specifiers:
1916                 CONST
1917                 {
1918                         struct ctf_node *node;
1919
1920                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1921                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1922                         node->u.type_specifier.type = TYPESPEC_CONST;
1923                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1924                 }
1925         |       type_specifier
1926                 {
1927                         struct ctf_node *node;
1928
1929                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1930                         node = $1;
1931                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1932                 }
1933         |       IDENTIFIER
1934                 {
1935                         struct ctf_node *node;
1936
1937                         add_type(scanner, $1);
1938                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1939                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1940                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
1941                         node->u.type_specifier.id_type = yylval.gs->s;
1942                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1943                 }
1944         |       alias_declaration_specifiers CONST
1945                 {
1946                         struct ctf_node *node;
1947
1948                         $$ = $1;
1949                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1950                         node->u.type_specifier.type = TYPESPEC_CONST;
1951                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1952                 }
1953         |       alias_declaration_specifiers type_specifier
1954                 {
1955                         $$ = $1;
1956                         cds_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1957                 }
1958         |       alias_declaration_specifiers IDENTIFIER
1959                 {
1960                         struct ctf_node *node;
1961
1962                         add_type(scanner, $2);
1963                         $$ = $1;
1964                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1965                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
1966                         node->u.type_specifier.id_type = yylval.gs->s;
1967                         cds_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1968                 }
1969         ;
1970
1971 struct_or_variant_declarator_list:
1972                 struct_or_variant_declarator
1973                 {       $$ = $1;        }
1974         |       struct_or_variant_declarator_list COMMA struct_or_variant_declarator
1975                 {
1976                         $$ = $1;
1977                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1978                 }
1979         ;
1980
1981 struct_or_variant_declarator:
1982                 declarator
1983                 {       $$ = $1;        }
1984         |       COLON unary_expression
1985                 {       $$ = $2;        }
1986         |       declarator COLON unary_expression
1987                 {
1988                         $$ = $1;
1989                         if (set_parent_node($3, $1))
1990                                 reparent_error(scanner, "struct_or_variant_declarator");
1991                 }
1992         ;
1993
1994 enumerator_list:
1995                 enumerator
1996                 {       $$ = $1;        }
1997         |       enumerator_list COMMA enumerator
1998                 {
1999                         $$ = $1;
2000                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2001                 }
2002         ;
2003
2004 enumerator:
2005                 IDENTIFIER
2006                 {
2007                         $$ = make_node(scanner, NODE_ENUMERATOR);
2008                         $$->u.enumerator.id = $1->s;
2009                 }
2010         |       ID_TYPE
2011                 {
2012                         $$ = make_node(scanner, NODE_ENUMERATOR);
2013                         $$->u.enumerator.id = $1->s;
2014                 }
2015         |       keywords
2016                 {
2017                         $$ = make_node(scanner, NODE_ENUMERATOR);
2018                         $$->u.enumerator.id = $1->s;
2019                 }
2020         |       STRING_LITERAL_START DQUOTE
2021                 {
2022                         $$ = make_node(scanner, NODE_ENUMERATOR);
2023                         $$->u.enumerator.id = "";
2024                 }
2025         |       STRING_LITERAL_START s_char_sequence DQUOTE
2026                 {
2027                         $$ = make_node(scanner, NODE_ENUMERATOR);
2028                         $$->u.enumerator.id = $2->s;
2029                 }
2030         |       IDENTIFIER EQUAL unary_expression_or_range
2031                 {
2032                         $$ = make_node(scanner, NODE_ENUMERATOR);
2033                         $$->u.enumerator.id = $1->s;
2034                         cds_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2035                 }
2036         |       ID_TYPE EQUAL unary_expression_or_range
2037                 {
2038                         $$ = make_node(scanner, NODE_ENUMERATOR);
2039                         $$->u.enumerator.id = $1->s;
2040                         cds_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2041                 }
2042         |       keywords EQUAL unary_expression_or_range
2043                 {
2044                         $$ = make_node(scanner, NODE_ENUMERATOR);
2045                         $$->u.enumerator.id = $1->s;
2046                         cds_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2047                 }
2048         |       STRING_LITERAL_START DQUOTE EQUAL unary_expression_or_range
2049                 {
2050                         $$ = make_node(scanner, NODE_ENUMERATOR);
2051                         $$->u.enumerator.id = "";
2052                         cds_list_splice(&($4)->tmp_head, &($$)->u.enumerator.values);
2053                 }
2054         |       STRING_LITERAL_START s_char_sequence DQUOTE EQUAL unary_expression_or_range
2055                 {
2056                         $$ = make_node(scanner, NODE_ENUMERATOR);
2057                         $$->u.enumerator.id = $2->s;
2058                         cds_list_splice(&($5)->tmp_head, &($$)->u.enumerator.values);
2059                 }
2060         ;
2061
2062 abstract_declarator_list:
2063                 abstract_declarator
2064                 {       $$ = $1;        }
2065         |       abstract_declarator_list COMMA abstract_declarator
2066                 {
2067                         $$ = $1;
2068                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2069                 }
2070         ;
2071
2072 abstract_declarator:
2073                 direct_abstract_declarator
2074                 {       $$ = $1;        }
2075         |       pointer direct_abstract_declarator
2076                 {
2077                         $$ = $2;
2078                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2079                 }
2080         ;
2081
2082 direct_abstract_declarator:
2083                 /* empty */
2084                 {
2085                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2086                         $$->u.type_declarator.type = TYPEDEC_ID;
2087                         /* id is NULL */
2088                 }
2089         |       IDENTIFIER
2090                 {
2091                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2092                         $$->u.type_declarator.type = TYPEDEC_ID;
2093                         $$->u.type_declarator.u.id = $1->s;
2094                 }
2095         |       LPAREN abstract_declarator RPAREN
2096                 {
2097                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2098                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2099                         $$->u.type_declarator.u.nested.type_declarator = $2;
2100                 }
2101         |       direct_abstract_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2102                 {
2103                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2104                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2105                         $$->u.type_declarator.u.nested.type_declarator = $1;
2106                         ($$)->u.type_declarator.u.nested.length = $3;
2107                 }
2108         |       direct_abstract_declarator LSBRAC RSBRAC
2109                 {
2110                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2111                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2112                         $$->u.type_declarator.u.nested.type_declarator = $1;
2113                         $$->u.type_declarator.u.nested.abstract_array = 1;
2114                 }
2115         ;
2116
2117 alias_abstract_declarator_list:
2118                 alias_abstract_declarator
2119                 {       $$ = $1;        }
2120         |       alias_abstract_declarator_list COMMA alias_abstract_declarator
2121                 {
2122                         $$ = $1;
2123                         cds_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2124                 }
2125         ;
2126
2127 alias_abstract_declarator:
2128                 direct_alias_abstract_declarator
2129                 {       $$ = $1;        }
2130         |       pointer direct_alias_abstract_declarator
2131                 {
2132                         $$ = $2;
2133                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2134                 }
2135         ;
2136
2137 direct_alias_abstract_declarator:
2138                 /* empty */
2139                 {
2140                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2141                         $$->u.type_declarator.type = TYPEDEC_ID;
2142                         /* id is NULL */
2143                 }
2144         |       LPAREN alias_abstract_declarator RPAREN
2145                 {
2146                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2147                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2148                         $$->u.type_declarator.u.nested.type_declarator = $2;
2149                 }
2150         |       direct_alias_abstract_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2151                 {
2152                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2153                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2154                         $$->u.type_declarator.u.nested.type_declarator = $1;
2155                         ($$)->u.type_declarator.u.nested.length = $3;
2156                 }
2157         |       direct_alias_abstract_declarator LSBRAC RSBRAC
2158                 {
2159                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2160                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2161                         $$->u.type_declarator.u.nested.type_declarator = $1;
2162                         $$->u.type_declarator.u.nested.abstract_array = 1;
2163                 }
2164         ;
2165
2166 declarator:
2167                 direct_declarator
2168                 {       $$ = $1;        }
2169         |       pointer direct_declarator
2170                 {
2171                         $$ = $2;
2172                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2173                 }
2174         ;
2175
2176 direct_declarator:
2177                 IDENTIFIER
2178                 {
2179                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2180                         $$->u.type_declarator.type = TYPEDEC_ID;
2181                         $$->u.type_declarator.u.id = $1->s;
2182                 }
2183         |       LPAREN declarator RPAREN
2184                 {
2185                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2186                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2187                         $$->u.type_declarator.u.nested.type_declarator = $2;
2188                 }
2189         |       direct_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2190                 {
2191                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2192                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2193                         $$->u.type_declarator.u.nested.type_declarator = $1;
2194                         ($$)->u.type_declarator.u.nested.length = $3;
2195                 }
2196         ;
2197
2198 type_declarator:
2199                 direct_type_declarator
2200                 {       $$ = $1;        }
2201         |       pointer direct_type_declarator
2202                 {
2203                         $$ = $2;
2204                         cds_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2205                 }
2206         ;
2207
2208 direct_type_declarator:
2209                 IDENTIFIER
2210                 {
2211                         add_type(scanner, $1);
2212                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2213                         $$->u.type_declarator.type = TYPEDEC_ID;
2214                         $$->u.type_declarator.u.id = $1->s;
2215                 }
2216         |       LPAREN type_declarator RPAREN
2217                 {
2218                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2219                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2220                         $$->u.type_declarator.u.nested.type_declarator = $2;
2221                 }
2222         |       direct_type_declarator LSBRAC declaration_specifiers_or_integer_constant RSBRAC
2223                 {
2224                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2225                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2226                         $$->u.type_declarator.u.nested.type_declarator = $1;
2227                         ($$)->u.type_declarator.u.nested.length = $3;
2228                 }
2229         ;
2230
2231 pointer:
2232                 STAR
2233                 {
2234                         $$ = make_node(scanner, NODE_POINTER);
2235                 }
2236         |       STAR pointer
2237                 {
2238                         $$ = make_node(scanner, NODE_POINTER);
2239                         cds_list_splice(&($2)->tmp_head, &($$)->tmp_head);
2240                 }
2241         |       STAR type_qualifier_list pointer
2242                 {
2243                         $$ = make_node(scanner, NODE_POINTER);
2244                         $$->u.pointer.const_qualifier = 1;
2245                         cds_list_splice(&($3)->tmp_head, &($$)->tmp_head);
2246                 }
2247         ;
2248
2249 type_qualifier_list:
2250                 /* pointer assumes only const type qualifier */
2251                 CONST
2252         |       type_qualifier_list CONST
2253         ;
2254
2255 /* 2.3: CTF-specific declarations */
2256
2257 ctf_assignment_expression_list:
2258                 ctf_assignment_expression SEMICOLON
2259                 {       $$ = $1;        }
2260         |       ctf_assignment_expression_list ctf_assignment_expression SEMICOLON
2261                 {
2262                         $$ = $1;
2263                         cds_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2264                 }
2265         ;
2266
2267 ctf_assignment_expression:
2268                 unary_expression EQUAL unary_expression
2269                 {
2270                         /*
2271                          * Because we have left and right, cannot use
2272                          * set_parent_node.
2273                          */
2274                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2275                         _cds_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2276                         if ($1->u.unary_expression.type != UNARY_STRING)
2277                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2278                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.ctf_expression.right);
2279                 }
2280         |       unary_expression TYPEASSIGN declaration_specifiers      /* Only allow struct */
2281                 {
2282                         /*
2283                          * Because we have left and right, cannot use
2284                          * set_parent_node.
2285                          */
2286                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2287                         _cds_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2288                         if ($1->u.unary_expression.type != UNARY_STRING)
2289                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2290                         cds_list_add_tail(&($3)->siblings, &($$)->u.ctf_expression.right);
2291                 }
2292         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list
2293                 {
2294                         struct ctf_node *list;
2295
2296                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2297                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2298                         _cds_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2299                         $$ = make_node(scanner, NODE_TYPEDEF);
2300                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2301                         _cds_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2302                 }
2303         |       TYPEDEF declaration_specifiers type_declarator_list
2304                 {
2305                         struct ctf_node *list;
2306
2307                         $$ = make_node(scanner, NODE_TYPEDEF);
2308                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2309                         $$->u._typedef.type_specifier_list = list;
2310                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2311                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2312                 }
2313         |       declaration_specifiers TYPEDEF type_declarator_list
2314                 {
2315                         struct ctf_node *list;
2316
2317                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2318                         _cds_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2319                         $$ = make_node(scanner, NODE_TYPEDEF);
2320                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2321                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2322                 }
2323         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list
2324                 {
2325                         struct ctf_node *list;
2326
2327                         $$ = make_node(scanner, NODE_TYPEALIAS);
2328                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2329                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2330
2331                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2332                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2333                         _cds_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2334                         _cds_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2335
2336                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2337                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2338                         _cds_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2339                         _cds_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2340                 }
2341         ;