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  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  25  * SOFTWARE.
  26  */
  27
  28 #include <stdio.h>
  29 #include <ctype.h>
  30 #include <unistd.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <assert.h>
  34 #include <glib.h>
  35 #include <errno.h>
  36 #include <inttypes.h>
  37 #include <babeltrace/list.h>
  38 #include <babeltrace/babeltrace-internal.h>
  39 #include "ctf-scanner.h"
  40 #include "ctf-parser.h"
  41 #include "ctf-ast.h"
  42 #include "objstack.h"
  43
  44 BT_HIDDEN
  45 int yydebug;
  46
  47 /* Join two lists, put "add" at the end of "head".  */
  48 static inline void
  49 _bt_list_splice_tail (struct bt_list_head *add, struct bt_list_head *head)
  50 {
  51         /* Do nothing if the list which gets added is empty.  */
  52         if (add != add->next) {
  53                 add->next->prev = head->prev;
  54                 add->prev->next = head;
  55                 head->prev->next = add->next;
  56                 head->prev = add->prev;
  57         }
  58 }
  59
  60 BT_HIDDEN
  61 int yyparse(struct ctf_scanner *scanner, yyscan_t yyscanner);
  62 BT_HIDDEN
  63 int yylex(union YYSTYPE *yyval, yyscan_t yyscanner);
  64 BT_HIDDEN
  65 int yylex_init_extra(struct ctf_scanner *scanner, yyscan_t * ptr_yy_globals);
  66 BT_HIDDEN
  67 int yylex_destroy(yyscan_t yyscanner);
  68 BT_HIDDEN
  69 void yyrestart(FILE * in_str, yyscan_t yyscanner);
  70 BT_HIDDEN
  71 int yyget_lineno(yyscan_t yyscanner);
  72 BT_HIDDEN
  73 char *yyget_text(yyscan_t yyscanner);
  74
  75 static const char *node_type_to_str[] = {
  76 #define ENTRY(S)        [S] = #S,
  77         FOREACH_CTF_NODES(ENTRY)
  78 #undef ENTRY
  79 };
  80
  81 /*
  82  * Static node for out of memory errors. Only "type" is used. lineno is
  83  * always left at 0. The rest of the node content can be overwritten,
  84  * but is never used.
  85  */
  86 static struct ctf_node error_node = {
  87         .type = NODE_ERROR,
  88 };
  89
  90 BT_HIDDEN
  91 const char *node_type(struct ctf_node *node)
  92 {
  93         if (node->type < NR_NODE_TYPES)
  94                 return node_type_to_str[node->type];
  95         else
  96                 return NULL;
  97 }
  98
  99 void setstring(struct ctf_scanner *scanner, YYSTYPE *lvalp, const char *src)
 100 {
 101         lvalp->s = objstack_alloc(scanner->objstack, strlen(src) + 1);
 102         strcpy(lvalp->s, src);
 103 }
 104
 105 static
 106 int str_check(size_t str_len, size_t offset, size_t len)
 107 {
 108         /* check overflow */
 109         if (offset + len < offset)
 110                 return -1;
 111         if (offset + len > str_len)
 112                 return -1;
 113         return 0;
 114 }
 115
 116 static
 117 int bt_isodigit(int c)
 118 {
 119         switch (c) {
 120         case '0':
 121         case '1':
 122         case '2':
 123         case '3':
 124         case '4':
 125         case '5':
 126         case '6':
 127         case '7':
 128                 return 1;
 129         default:
 130                 return 0;
 131         }
 132 }
 133
 134 static
 135 int parse_base_sequence(const char *src, size_t len, size_t pos,
 136                 char *buffer, size_t *buf_len, int base)
 137 {
 138         const size_t max_char = 3;
 139         int nr_char = 0;
 140
 141         while (!str_check(len, pos, 1) && nr_char < max_char) {
 142                 char c = src[pos++];
 143
 144                 if (base == 8) {
 145                         if (bt_isodigit(c))
 146                                 buffer[nr_char++] = c;
 147                         else
 148                                 break;
 149                 } else if (base == 16) {
 150                         if (isxdigit(c))
 151                                 buffer[nr_char++] = c;
 152                         else
 153                                 break;
 154
 155                 } else {
 156                         /* Unsupported base */
 157                         return -1;
 158                 }
 159         }
 160         assert(nr_char > 0);
 161         buffer[nr_char] = '\0';
 162         *buf_len = nr_char;
 163         return 0;
 164 }
 165
 166 static
 167 int import_basic_string(struct ctf_scanner *scanner, YYSTYPE *lvalp,
 168                 size_t len, const char *src, char delim)
 169 {
 170         size_t pos = 0, dpos = 0;
 171
 172         if (str_check(len, pos, 1))
 173                 return -1;
 174         if (src[pos++] != delim)
 175                 return -1;
 176
 177         while (src[pos] != delim) {
 178                 char c;
 179
 180                 if (str_check(len, pos, 1))
 181                         return -1;
 182                 c = src[pos++];
 183                 if (c == '\\') {
 184                         if (str_check(len, pos, 1))
 185                                 return -1;
 186                         c = src[pos++];
 187
 188                         switch (c) {
 189                         case 'a':
 190                                 c = '\a';
 191                                 break;
 192                         case 'b':
 193                                 c = '\b';
 194                                 break;
 195                         case 'f':
 196                                 c = '\f';
 197                                 break;
 198                         case 'n':
 199                                 c = '\n';
 200                                 break;
 201                         case 'r':
 202                                 c = '\r';
 203                                 break;
 204                         case 't':
 205                                 c = '\t';
 206                                 break;
 207                         case 'v':
 208                                 c = '\v';
 209                                 break;
 210                         case '\\':
 211                                 c = '\\';
 212                                 break;
 213                         case '\'':
 214                                 c = '\'';
 215                                 break;
 216                         case '\"':
 217                                 c = '\"';
 218                                 break;
 219                         case '?':
 220                                 c = '?';
 221                                 break;
 222                         case '0':
 223                         case '1':
 224                         case '2':
 225                         case '3':
 226                         case '4':
 227                         case '5':
 228                         case '6':
 229                         case '7':
 230                         {
 231                                 char oct_buffer[4];
 232                                 size_t oct_len;
 233
 234                                 if (parse_base_sequence(src, len, pos - 1,
 235                                                 oct_buffer, &oct_len, 8))
 236                                         return -1;
 237                                 c = strtoul(&oct_buffer[0], NULL, 8);
 238                                 pos += oct_len - 1;
 239                                 break;
 240                         }
 241                         case 'x':
 242                         {
 243                                 char hex_buffer[4];
 244                                 size_t hex_len;
 245
 246                                 if (parse_base_sequence(src, len, pos,
 247                                                 hex_buffer, &hex_len, 16))
 248                                         return -1;
 249                                 c = strtoul(&hex_buffer[0], NULL, 16);
 250                                 pos += hex_len;
 251                                 break;
 252                         }
 253                         default:
 254                                 return -1;
 255                         }
 256                 }
 257                 if (str_check(len, dpos, 1))
 258                         return -1;
 259                 lvalp->s[dpos++] = c;
 260         }
 261
 262         if (str_check(len, dpos, 1))
 263                 return -1;
 264         lvalp->s[dpos++] = '\0';
 265
 266         if (str_check(len, pos, 1))
 267                 return -1;
 268         if (src[pos++] != delim)
 269                 return -1;
 270
 271         if (str_check(len, pos, 1))
 272                 return -1;
 273         if (src[pos] != '\0')
 274                 return -1;
 275         return 0;
 276 }
 277
 278 int import_string(struct ctf_scanner *scanner, YYSTYPE *lvalp,
 279                 const char *src, char delim)
 280 {
 281         size_t len;
 282
 283         len = strlen(src) + 1;
 284         lvalp->s = objstack_alloc(scanner->objstack, len);
 285         if (src[0] == 'L') {
 286                 // TODO: import wide string
 287                 printfl_error(yyget_lineno(scanner),
 288                         "Wide string not supported yet.");
 289                 return -1;
 290         } else {
 291                 return import_basic_string(scanner, lvalp, len, src, delim);
 292         }
 293 }
 294
 295 static void init_scope(struct ctf_scanner_scope *scope,
 296                        struct ctf_scanner_scope *parent)
 297 {
 298         scope->parent = parent;
 299         scope->types = g_hash_table_new_full(g_str_hash, g_str_equal,
 300                                              NULL, NULL);
 301 }
 302
 303 static void finalize_scope(struct ctf_scanner_scope *scope)
 304 {
 305         g_hash_table_destroy(scope->types);
 306 }
 307
 308 static void push_scope(struct ctf_scanner *scanner)
 309 {
 310         struct ctf_scanner_scope *ns;
 311
 312         printf_debug("push scope\n");
 313         ns = malloc(sizeof(struct ctf_scanner_scope));
 314         init_scope(ns, scanner->cs);
 315         scanner->cs = ns;
 316 }
 317
 318 static void pop_scope(struct ctf_scanner *scanner)
 319 {
 320         struct ctf_scanner_scope *os;
 321
 322         printf_debug("pop scope\n");
 323         os = scanner->cs;
 324         scanner->cs = os->parent;
 325         finalize_scope(os);
 326         free(os);
 327 }
 328
 329 static int lookup_type(struct ctf_scanner_scope *s, const char *id)
 330 {
 331         int ret;
 332
 333         ret = (int) (long) g_hash_table_lookup(s->types, id);
 334         printf_debug("lookup %p %s %d\n", s, id, ret);
 335         return ret;
 336 }
 337
 338 BT_HIDDEN
 339 int is_type(struct ctf_scanner *scanner, const char *id)
 340 {
 341         struct ctf_scanner_scope *it;
 342         int ret = 0;
 343
 344         for (it = scanner->cs; it != NULL; it = it->parent) {
 345                 if (lookup_type(it, id)) {
 346                         ret = 1;
 347                         break;
 348                 }
 349         }
 350         printf_debug("is type %s %d\n", id, ret);
 351         return ret;
 352 }
 353
 354 static void add_type(struct ctf_scanner *scanner, char *id)
 355 {
 356         printf_debug("add type %s\n", id);
 357         if (lookup_type(scanner->cs, id))
 358                 return;
 359         g_hash_table_insert(scanner->cs->types, id, id);
 360 }
 361
 362 static struct ctf_node *make_node(struct ctf_scanner *scanner,
 363                                   enum node_type type)
 364 {
 365         struct ctf_node *node;
 366
 367         node = objstack_alloc(scanner->objstack, sizeof(*node));
 368         if (!node) {
 369                 printfl_fatal(yyget_lineno(scanner->scanner), "out of memory");
 370                 return &error_node;
 371         }
 372         node->type = type;
 373         node->lineno = yyget_lineno(scanner->scanner);
 374         BT_INIT_LIST_HEAD(&node->tmp_head);
 375         bt_list_add(&node->siblings, &node->tmp_head);
 376
 377         switch (type) {
 378         case NODE_ROOT:
 379                 node->type = NODE_ERROR;
 380                 printfn_fatal(node, "trying to create root node");
 381                 break;
 382
 383         case NODE_EVENT:
 384                 BT_INIT_LIST_HEAD(&node->u.event.declaration_list);
 385                 break;
 386         case NODE_STREAM:
 387                 BT_INIT_LIST_HEAD(&node->u.stream.declaration_list);
 388                 break;
 389         case NODE_ENV:
 390                 BT_INIT_LIST_HEAD(&node->u.env.declaration_list);
 391                 break;
 392         case NODE_TRACE:
 393                 BT_INIT_LIST_HEAD(&node->u.trace.declaration_list);
 394                 break;
 395         case NODE_CLOCK:
 396                 BT_INIT_LIST_HEAD(&node->u.clock.declaration_list);
 397                 break;
 398         case NODE_CALLSITE:
 399                 BT_INIT_LIST_HEAD(&node->u.callsite.declaration_list);
 400                 break;
 401
 402         case NODE_CTF_EXPRESSION:
 403                 BT_INIT_LIST_HEAD(&node->u.ctf_expression.left);
 404                 BT_INIT_LIST_HEAD(&node->u.ctf_expression.right);
 405                 break;
 406         case NODE_UNARY_EXPRESSION:
 407                 break;
 408
 409         case NODE_TYPEDEF:
 410                 BT_INIT_LIST_HEAD(&node->u._typedef.type_declarators);
 411                 break;
 412         case NODE_TYPEALIAS_TARGET:
 413                 BT_INIT_LIST_HEAD(&node->u.typealias_target.type_declarators);
 414                 break;
 415         case NODE_TYPEALIAS_ALIAS:
 416                 BT_INIT_LIST_HEAD(&node->u.typealias_alias.type_declarators);
 417                 break;
 418         case NODE_TYPEALIAS:
 419                 break;
 420
 421         case NODE_TYPE_SPECIFIER:
 422                 break;
 423         case NODE_TYPE_SPECIFIER_LIST:
 424                 BT_INIT_LIST_HEAD(&node->u.type_specifier_list.head);
 425                 break;
 426         case NODE_POINTER:
 427                 break;
 428         case NODE_TYPE_DECLARATOR:
 429                 BT_INIT_LIST_HEAD(&node->u.type_declarator.pointers);
 430                 break;
 431
 432         case NODE_FLOATING_POINT:
 433                 BT_INIT_LIST_HEAD(&node->u.floating_point.expressions);
 434                 break;
 435         case NODE_INTEGER:
 436                 BT_INIT_LIST_HEAD(&node->u.integer.expressions);
 437                 break;
 438         case NODE_STRING:
 439                 BT_INIT_LIST_HEAD(&node->u.string.expressions);
 440                 break;
 441         case NODE_ENUMERATOR:
 442                 BT_INIT_LIST_HEAD(&node->u.enumerator.values);
 443                 break;
 444         case NODE_ENUM:
 445                 BT_INIT_LIST_HEAD(&node->u._enum.enumerator_list);
 446                 break;
 447         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 448                 BT_INIT_LIST_HEAD(&node->u.struct_or_variant_declaration.type_declarators);
 449                 break;
 450         case NODE_VARIANT:
 451                 BT_INIT_LIST_HEAD(&node->u.variant.declaration_list);
 452                 break;
 453         case NODE_STRUCT:
 454                 BT_INIT_LIST_HEAD(&node->u._struct.declaration_list);
 455                 BT_INIT_LIST_HEAD(&node->u._struct.min_align);
 456                 break;
 457
 458         case NODE_UNKNOWN:
 459         default:
 460                 node->type = NODE_ERROR;
 461                 printfn_fatal(node, "unknown node type '%d'", (int) type);
 462                 break;
 463         }
 464
 465         return node;
 466 }
 467
 468 static int reparent_ctf_expression(struct ctf_node *node,
 469                                    struct ctf_node *parent)
 470 {
 471         switch (parent->type) {
 472         case NODE_EVENT:
 473                 _bt_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 474                 break;
 475         case NODE_STREAM:
 476                 _bt_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 477                 break;
 478         case NODE_ENV:
 479                 _bt_list_splice_tail(&node->tmp_head, &parent->u.env.declaration_list);
 480                 break;
 481         case NODE_TRACE:
 482                 _bt_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 483                 break;
 484         case NODE_CLOCK:
 485                 _bt_list_splice_tail(&node->tmp_head, &parent->u.clock.declaration_list);
 486                 break;
 487         case NODE_CALLSITE:
 488                 _bt_list_splice_tail(&node->tmp_head, &parent->u.callsite.declaration_list);
 489                 break;
 490         case NODE_FLOATING_POINT:
 491                 _bt_list_splice_tail(&node->tmp_head, &parent->u.floating_point.expressions);
 492                 break;
 493         case NODE_INTEGER:
 494                 _bt_list_splice_tail(&node->tmp_head, &parent->u.integer.expressions);
 495                 break;
 496         case NODE_STRING:
 497                 _bt_list_splice_tail(&node->tmp_head, &parent->u.string.expressions);
 498                 break;
 499
 500         case NODE_ROOT:
 501         case NODE_CTF_EXPRESSION:
 502         case NODE_TYPEDEF:
 503         case NODE_TYPEALIAS_TARGET:
 504         case NODE_TYPEALIAS_ALIAS:
 505         case NODE_TYPEALIAS:
 506         case NODE_TYPE_SPECIFIER:
 507         case NODE_TYPE_SPECIFIER_LIST:
 508         case NODE_POINTER:
 509         case NODE_TYPE_DECLARATOR:
 510         case NODE_ENUMERATOR:
 511         case NODE_ENUM:
 512         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 513         case NODE_VARIANT:
 514         case NODE_STRUCT:
 515         case NODE_UNARY_EXPRESSION:
 516                 return -EPERM;
 517
 518         case NODE_UNKNOWN:
 519         default:
 520                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 521                 return -EINVAL;
 522         }
 523         return 0;
 524 }
 525
 526 static int reparent_typedef(struct ctf_node *node, struct ctf_node *parent)
 527 {
 528         switch (parent->type) {
 529         case NODE_ROOT:
 530                 _bt_list_splice_tail(&node->tmp_head, &parent->u.root.declaration_list);
 531                 break;
 532         case NODE_EVENT:
 533                 _bt_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 534                 break;
 535         case NODE_STREAM:
 536                 _bt_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 537                 break;
 538         case NODE_ENV:
 539                 _bt_list_splice_tail(&node->tmp_head, &parent->u.env.declaration_list);
 540                 break;
 541         case NODE_TRACE:
 542                 _bt_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 543                 break;
 544         case NODE_CLOCK:
 545                 _bt_list_splice_tail(&node->tmp_head, &parent->u.clock.declaration_list);
 546                 break;
 547         case NODE_CALLSITE:
 548                 _bt_list_splice_tail(&node->tmp_head, &parent->u.callsite.declaration_list);
 549                 break;
 550         case NODE_VARIANT:
 551                 _bt_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 552                 break;
 553         case NODE_STRUCT:
 554                 _bt_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 555                 break;
 556
 557         case NODE_FLOATING_POINT:
 558         case NODE_INTEGER:
 559         case NODE_STRING:
 560         case NODE_CTF_EXPRESSION:
 561         case NODE_TYPEDEF:
 562         case NODE_TYPEALIAS_TARGET:
 563         case NODE_TYPEALIAS_ALIAS:
 564         case NODE_TYPEALIAS:
 565         case NODE_TYPE_SPECIFIER:
 566         case NODE_TYPE_SPECIFIER_LIST:
 567         case NODE_POINTER:
 568         case NODE_TYPE_DECLARATOR:
 569         case NODE_ENUMERATOR:
 570         case NODE_ENUM:
 571         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 572         case NODE_UNARY_EXPRESSION:
 573                 return -EPERM;
 574
 575         case NODE_UNKNOWN:
 576         default:
 577                 printfn_fatal(node, "unknown node type %d", parent->type);
 578                 return -EINVAL;
 579         }
 580         return 0;
 581 }
 582
 583 static int reparent_typealias(struct ctf_node *node, struct ctf_node *parent)
 584 {
 585         switch (parent->type) {
 586         case NODE_ROOT:
 587                 _bt_list_splice_tail(&node->tmp_head, &parent->u.root.declaration_list);
 588                 break;
 589         case NODE_EVENT:
 590                 _bt_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 591                 break;
 592         case NODE_STREAM:
 593                 _bt_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 594                 break;
 595         case NODE_ENV:
 596                 _bt_list_splice_tail(&node->tmp_head, &parent->u.env.declaration_list);
 597                 break;
 598         case NODE_TRACE:
 599                 _bt_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 600                 break;
 601         case NODE_CLOCK:
 602                 _bt_list_splice_tail(&node->tmp_head, &parent->u.clock.declaration_list);
 603                 break;
 604         case NODE_CALLSITE:
 605                 _bt_list_splice_tail(&node->tmp_head, &parent->u.callsite.declaration_list);
 606                 break;
 607         case NODE_VARIANT:
 608                 _bt_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 609                 break;
 610         case NODE_STRUCT:
 611                 _bt_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 612                 break;
 613
 614         case NODE_FLOATING_POINT:
 615         case NODE_INTEGER:
 616         case NODE_STRING:
 617         case NODE_CTF_EXPRESSION:
 618         case NODE_TYPEDEF:
 619         case NODE_TYPEALIAS_TARGET:
 620         case NODE_TYPEALIAS_ALIAS:
 621         case NODE_TYPEALIAS:
 622         case NODE_TYPE_SPECIFIER:
 623         case NODE_TYPE_SPECIFIER_LIST:
 624         case NODE_POINTER:
 625         case NODE_TYPE_DECLARATOR:
 626         case NODE_ENUMERATOR:
 627         case NODE_ENUM:
 628         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 629         case NODE_UNARY_EXPRESSION:
 630                 return -EPERM;
 631
 632         case NODE_UNKNOWN:
 633         default:
 634                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 635                 return -EINVAL;
 636         }
 637         return 0;
 638 }
 639
 640 static int reparent_type_specifier(struct ctf_node *node,
 641                                    struct ctf_node *parent)
 642 {
 643         switch (parent->type) {
 644         case NODE_TYPE_SPECIFIER_LIST:
 645                 _bt_list_splice_tail(&node->tmp_head, &parent->u.type_specifier_list.head);
 646                 break;
 647
 648         case NODE_TYPE_SPECIFIER:
 649         case NODE_EVENT:
 650         case NODE_STREAM:
 651         case NODE_ENV:
 652         case NODE_TRACE:
 653         case NODE_CLOCK:
 654         case NODE_CALLSITE:
 655         case NODE_VARIANT:
 656         case NODE_STRUCT:
 657         case NODE_TYPEDEF:
 658         case NODE_TYPEALIAS_TARGET:
 659         case NODE_TYPEALIAS_ALIAS:
 660         case NODE_TYPE_DECLARATOR:
 661         case NODE_ENUM:
 662         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 663         case NODE_TYPEALIAS:
 664         case NODE_FLOATING_POINT:
 665         case NODE_INTEGER:
 666         case NODE_STRING:
 667         case NODE_CTF_EXPRESSION:
 668         case NODE_POINTER:
 669         case NODE_ENUMERATOR:
 670         case NODE_UNARY_EXPRESSION:
 671                 return -EPERM;
 672
 673         case NODE_UNKNOWN:
 674         default:
 675                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 676                 return -EINVAL;
 677         }
 678         return 0;
 679 }
 680
 681 static int reparent_type_specifier_list(struct ctf_node *node,
 682                                         struct ctf_node *parent)
 683 {
 684         switch (parent->type) {
 685         case NODE_ROOT:
 686                 bt_list_add_tail(&node->siblings, &parent->u.root.declaration_list);
 687                 break;
 688         case NODE_EVENT:
 689                 bt_list_add_tail(&node->siblings, &parent->u.event.declaration_list);
 690                 break;
 691         case NODE_STREAM:
 692                 bt_list_add_tail(&node->siblings, &parent->u.stream.declaration_list);
 693                 break;
 694         case NODE_ENV:
 695                 bt_list_add_tail(&node->siblings, &parent->u.env.declaration_list);
 696                 break;
 697         case NODE_TRACE:
 698                 bt_list_add_tail(&node->siblings, &parent->u.trace.declaration_list);
 699                 break;
 700         case NODE_CLOCK:
 701                 bt_list_add_tail(&node->siblings, &parent->u.clock.declaration_list);
 702                 break;
 703         case NODE_CALLSITE:
 704                 bt_list_add_tail(&node->siblings, &parent->u.callsite.declaration_list);
 705                 break;
 706         case NODE_VARIANT:
 707                 bt_list_add_tail(&node->siblings, &parent->u.variant.declaration_list);
 708                 break;
 709         case NODE_STRUCT:
 710                 bt_list_add_tail(&node->siblings, &parent->u._struct.declaration_list);
 711                 break;
 712         case NODE_TYPEDEF:
 713                 parent->u._typedef.type_specifier_list = node;
 714                 break;
 715         case NODE_TYPEALIAS_TARGET:
 716                 parent->u.typealias_target.type_specifier_list = node;
 717                 break;
 718         case NODE_TYPEALIAS_ALIAS:
 719                 parent->u.typealias_alias.type_specifier_list = node;
 720                 break;
 721         case NODE_ENUM:
 722                 parent->u._enum.container_type = node;
 723                 break;
 724         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 725                 parent->u.struct_or_variant_declaration.type_specifier_list = node;
 726                 break;
 727         case NODE_TYPE_DECLARATOR:
 728         case NODE_TYPE_SPECIFIER:
 729         case NODE_TYPEALIAS:
 730         case NODE_FLOATING_POINT:
 731         case NODE_INTEGER:
 732         case NODE_STRING:
 733         case NODE_CTF_EXPRESSION:
 734         case NODE_POINTER:
 735         case NODE_ENUMERATOR:
 736         case NODE_UNARY_EXPRESSION:
 737                 return -EPERM;
 738
 739         case NODE_UNKNOWN:
 740         default:
 741                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 742                 return -EINVAL;
 743         }
 744         return 0;
 745 }
 746
 747 static int reparent_type_declarator(struct ctf_node *node,
 748                                     struct ctf_node *parent)
 749 {
 750         switch (parent->type) {
 751         case NODE_TYPE_DECLARATOR:
 752                 parent->u.type_declarator.type = TYPEDEC_NESTED;
 753                 parent->u.type_declarator.u.nested.type_declarator = node;
 754                 break;
 755         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 756                 _bt_list_splice_tail(&node->tmp_head, &parent->u.struct_or_variant_declaration.type_declarators);
 757                 break;
 758         case NODE_TYPEDEF:
 759                 _bt_list_splice_tail(&node->tmp_head, &parent->u._typedef.type_declarators);
 760                 break;
 761         case NODE_TYPEALIAS_TARGET:
 762                 _bt_list_splice_tail(&node->tmp_head, &parent->u.typealias_target.type_declarators);
 763                 break;
 764         case NODE_TYPEALIAS_ALIAS:
 765                 _bt_list_splice_tail(&node->tmp_head, &parent->u.typealias_alias.type_declarators);
 766                 break;
 767
 768         case NODE_ROOT:
 769         case NODE_EVENT:
 770         case NODE_STREAM:
 771         case NODE_ENV:
 772         case NODE_TRACE:
 773         case NODE_CLOCK:
 774         case NODE_CALLSITE:
 775         case NODE_VARIANT:
 776         case NODE_STRUCT:
 777         case NODE_TYPEALIAS:
 778         case NODE_ENUM:
 779         case NODE_FLOATING_POINT:
 780         case NODE_INTEGER:
 781         case NODE_STRING:
 782         case NODE_CTF_EXPRESSION:
 783         case NODE_TYPE_SPECIFIER:
 784         case NODE_TYPE_SPECIFIER_LIST:
 785         case NODE_POINTER:
 786         case NODE_ENUMERATOR:
 787         case NODE_UNARY_EXPRESSION:
 788                 return -EPERM;
 789
 790         case NODE_UNKNOWN:
 791         default:
 792                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 793                 return -EINVAL;
 794         }
 795         return 0;
 796 }
 797
 798 /*
 799  * set_parent_node
 800  *
 801  * Link node to parent. Returns 0 on success, -EPERM if it is not permitted to
 802  * create the link declared by the input, -ENOENT if node or parent is NULL,
 803  * -EINVAL if there is an internal structure problem.
 804  */
 805 static int set_parent_node(struct ctf_node *node,
 806                          struct ctf_node *parent)
 807 {
 808         if (!node || !parent)
 809                 return -ENOENT;
 810
 811         /* Note: Linking to parent will be done only by an external visitor */
 812
 813         switch (node->type) {
 814         case NODE_ROOT:
 815                 printfn_fatal(node, "trying to reparent root node");
 816                 return -EINVAL;
 817
 818         case NODE_EVENT:
 819                 if (parent->type == NODE_ROOT) {
 820                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.event);
 821                 } else {
 822                         return -EPERM;
 823                 }
 824                 break;
 825         case NODE_STREAM:
 826                 if (parent->type == NODE_ROOT) {
 827                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.stream);
 828                 } else {
 829                         return -EPERM;
 830                 }
 831                 break;
 832         case NODE_ENV:
 833                 if (parent->type == NODE_ROOT) {
 834                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.env);
 835                 } else {
 836                         return -EPERM;
 837                 }
 838                 break;
 839         case NODE_TRACE:
 840                 if (parent->type == NODE_ROOT) {
 841                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.trace);
 842                 } else {
 843                         return -EPERM;
 844                 }
 845                 break;
 846         case NODE_CLOCK:
 847                 if (parent->type == NODE_ROOT) {
 848                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.clock);
 849                 } else {
 850                         return -EPERM;
 851                 }
 852                 break;
 853         case NODE_CALLSITE:
 854                 if (parent->type == NODE_ROOT) {
 855                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.callsite);
 856                 } else {
 857                         return -EPERM;
 858                 }
 859                 break;
 860
 861         case NODE_CTF_EXPRESSION:
 862                 return reparent_ctf_expression(node, parent);
 863         case NODE_UNARY_EXPRESSION:
 864                 if (parent->type == NODE_TYPE_DECLARATOR)
 865                         parent->u.type_declarator.bitfield_len = node;
 866                 else
 867                         return -EPERM;
 868                 break;
 869
 870         case NODE_TYPEDEF:
 871                 return reparent_typedef(node, parent);
 872         case NODE_TYPEALIAS_TARGET:
 873                 if (parent->type == NODE_TYPEALIAS)
 874                         parent->u.typealias.target = node;
 875                 else
 876                         return -EINVAL;
 877         case NODE_TYPEALIAS_ALIAS:
 878                 if (parent->type == NODE_TYPEALIAS)
 879                         parent->u.typealias.alias = node;
 880                 else
 881                         return -EINVAL;
 882         case NODE_TYPEALIAS:
 883                 return reparent_typealias(node, parent);
 884
 885         case NODE_POINTER:
 886                 if (parent->type == NODE_TYPE_DECLARATOR) {
 887                         _bt_list_splice_tail(&node->tmp_head, &parent->u.type_declarator.pointers);
 888                 } else
 889                         return -EPERM;
 890                 break;
 891         case NODE_TYPE_DECLARATOR:
 892                 return reparent_type_declarator(node, parent);
 893
 894         case NODE_TYPE_SPECIFIER_LIST:
 895                 return reparent_type_specifier_list(node, parent);
 896
 897         case NODE_TYPE_SPECIFIER:
 898                 return reparent_type_specifier(node, parent);
 899
 900         case NODE_FLOATING_POINT:
 901         case NODE_INTEGER:
 902         case NODE_STRING:
 903         case NODE_ENUM:
 904         case NODE_VARIANT:
 905         case NODE_STRUCT:
 906                 return -EINVAL; /* Dealt with internally within grammar */
 907
 908         case NODE_ENUMERATOR:
 909                 if (parent->type == NODE_ENUM) {
 910                         _bt_list_splice_tail(&node->tmp_head, &parent->u._enum.enumerator_list);
 911                 } else {
 912                         return -EPERM;
 913                 }
 914                 break;
 915         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 916                 switch (parent->type) {
 917                 case NODE_STRUCT:
 918                         _bt_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 919                         break;
 920                 case NODE_VARIANT:
 921                         _bt_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 922                         break;
 923                 default:
 924                         return -EINVAL;
 925                 }
 926                 break;
 927
 928         case NODE_UNKNOWN:
 929         default:
 930                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 931                 return -EINVAL;
 932         }
 933         return 0;
 934 }
 935
 936 BT_HIDDEN
 937 void yyerror(struct ctf_scanner *scanner, yyscan_t yyscanner, const char *str)
 938 {
 939         printfl_error(yyget_lineno(scanner->scanner),
 940                 "token \"%s\": %s\n",
 941                 yyget_text(scanner->scanner), str);
 942 }
 943
 944 BT_HIDDEN
 945 int yywrap(void)
 946 {
 947         return 1;
 948 }
 949
 950 #define reparent_error(scanner, str)                            \
 951 do {                                                            \
 952         yyerror(scanner, scanner->scanner, YY_("reparent_error: " str)); \
 953         YYERROR;                                                \
 954 } while (0)
 955
 956 static struct ctf_ast *ctf_ast_alloc(struct ctf_scanner *scanner)
 957 {
 958         struct ctf_ast *ast;
 959
 960         ast = objstack_alloc(scanner->objstack, sizeof(*ast));
 961         if (!ast)
 962                 return NULL;
 963         ast->root.type = NODE_ROOT;
 964         BT_INIT_LIST_HEAD(&ast->root.tmp_head);
 965         BT_INIT_LIST_HEAD(&ast->root.u.root.declaration_list);
 966         BT_INIT_LIST_HEAD(&ast->root.u.root.trace);
 967         BT_INIT_LIST_HEAD(&ast->root.u.root.env);
 968         BT_INIT_LIST_HEAD(&ast->root.u.root.stream);
 969         BT_INIT_LIST_HEAD(&ast->root.u.root.event);
 970         BT_INIT_LIST_HEAD(&ast->root.u.root.clock);
 971         BT_INIT_LIST_HEAD(&ast->root.u.root.callsite);
 972         return ast;
 973 }
 974
 975 int ctf_scanner_append_ast(struct ctf_scanner *scanner, FILE *input)
 976 {
 977         /* Start processing new stream */
 978         yyrestart(input, scanner->scanner);
 979         if (yydebug)
 980                 fprintf(stdout, "Scanner input is a%s.\n",
 981                         isatty(fileno(input)) ? "n interactive tty" :
 982                                                 " noninteractive file");
 983         return yyparse(scanner, scanner->scanner);
 984 }
 985
 986 struct ctf_scanner *ctf_scanner_alloc(void)
 987 {
 988         struct ctf_scanner *scanner;
 989         int ret;
 990
 991         yydebug = babeltrace_debug;
 992
 993         scanner = malloc(sizeof(*scanner));
 994         if (!scanner)
 995                 return NULL;
 996         memset(scanner, 0, sizeof(*scanner));
 997         ret = yylex_init_extra(scanner, &scanner->scanner);
 998         if (ret) {
 999                 printf_fatal("yylex_init error");
1000                 goto cleanup_scanner;
1001         }
1002         scanner->objstack = objstack_create();
1003         if (!scanner->objstack)
1004                 goto cleanup_lexer;
1005         scanner->ast = ctf_ast_alloc(scanner);
1006         if (!scanner->ast)
1007                 goto cleanup_objstack;
1008         init_scope(&scanner->root_scope, NULL);
1009         scanner->cs = &scanner->root_scope;
1010
1011         return scanner;
1012
1013 cleanup_objstack:
1014         objstack_destroy(scanner->objstack);
1015 cleanup_lexer:
1016         ret = yylex_destroy(scanner->scanner);
1017         if (!ret)
1018                 printf_fatal("yylex_destroy error");
1019 cleanup_scanner:
1020         free(scanner);
1021         return NULL;
1022 }
1023
1024 void ctf_scanner_free(struct ctf_scanner *scanner)
1025 {
1026         int ret;
1027
1028         finalize_scope(&scanner->root_scope);
1029         objstack_destroy(scanner->objstack);
1030         ret = yylex_destroy(scanner->scanner);
1031         if (ret)
1032                 printf_error("yylex_destroy error");
1033         free(scanner);
1034 }
1035
1036 %}
1037
1038 %define api.pure
1039         /* %locations */
1040 %error-verbose
1041 %parse-param {struct ctf_scanner *scanner}
1042 %parse-param {yyscan_t yyscanner}
1043 %lex-param {yyscan_t yyscanner}
1044 /*
1045  * Expect two shift-reduce conflicts. Caused by enum name-opt : type {}
1046  * vs struct { int :value; } (unnamed bit-field). The default is to
1047  * shift, so whenever we encounter an enumeration, we are doing the
1048  * proper thing (shift). It is illegal to declare an enumeration
1049  * "bit-field", so it is OK if this situation ends up in a parsing
1050  * error.
1051  */
1052 %expect 2
1053 %start file
1054 %token INTEGER_LITERAL STRING_LITERAL CHARACTER_LITERAL LSBRAC RSBRAC LPAREN RPAREN LBRAC RBRAC RARROW STAR PLUS MINUS LT GT TYPEASSIGN COLON SEMICOLON DOTDOTDOT DOT EQUAL COMMA CONST CHAR DOUBLE ENUM ENV EVENT FLOATING_POINT FLOAT INTEGER INT LONG SHORT SIGNED STREAM STRING STRUCT TRACE CALLSITE CLOCK TYPEALIAS TYPEDEF UNSIGNED VARIANT VOID _BOOL _COMPLEX _IMAGINARY TOK_ALIGN
1055 %token <s> IDENTIFIER ID_TYPE
1056 %token ERROR
1057 %union
1058 {
1059         long long ll;
1060         unsigned long long ull;
1061         char c;
1062         char *s;
1063         struct ctf_node *n;
1064 }
1065
1066 %type <s> STRING_LITERAL CHARACTER_LITERAL
1067
1068 %type <s> keywords
1069
1070 %type <ull> INTEGER_LITERAL
1071 %type <n> postfix_expression unary_expression unary_expression_or_range
1072
1073 %type <n> declaration
1074 %type <n> event_declaration
1075 %type <n> stream_declaration
1076 %type <n> env_declaration
1077 %type <n> trace_declaration
1078 %type <n> clock_declaration
1079 %type <n> callsite_declaration
1080 %type <n> integer_declaration_specifiers
1081 %type <n> declaration_specifiers
1082 %type <n> alias_declaration_specifiers
1083
1084 %type <n> type_declarator_list
1085 %type <n> integer_type_specifier
1086 %type <n> type_specifier
1087 %type <n> struct_type_specifier
1088 %type <n> variant_type_specifier
1089 %type <n> enum_type_specifier
1090 %type <n> struct_or_variant_declaration_list
1091 %type <n> struct_or_variant_declaration
1092 %type <n> struct_or_variant_declarator_list
1093 %type <n> struct_or_variant_declarator
1094 %type <n> enumerator_list
1095 %type <n> enumerator
1096 %type <n> abstract_declarator_list
1097 %type <n> abstract_declarator
1098 %type <n> direct_abstract_declarator
1099 %type <n> alias_abstract_declarator_list
1100 %type <n> alias_abstract_declarator
1101 %type <n> direct_alias_abstract_declarator
1102 %type <n> declarator
1103 %type <n> direct_declarator
1104 %type <n> type_declarator
1105 %type <n> direct_type_declarator
1106 %type <n> pointer
1107 %type <n> ctf_assignment_expression_list
1108 %type <n> ctf_assignment_expression
1109
1110 %%
1111
1112 file:
1113                 declaration
1114                 {
1115                         if (set_parent_node($1, &ctf_scanner_get_ast(scanner)->root))
1116                                 reparent_error(scanner, "error reparenting to root");
1117                 }
1118         |       file declaration
1119                 {
1120                         if (set_parent_node($2, &ctf_scanner_get_ast(scanner)->root))
1121                                 reparent_error(scanner, "error reparenting to root");
1122                 }
1123         ;
1124
1125 keywords:
1126                 VOID
1127                 {       $$ = yylval.s;          }
1128         |       CHAR
1129                 {       $$ = yylval.s;          }
1130         |       SHORT
1131                 {       $$ = yylval.s;          }
1132         |       INT
1133                 {       $$ = yylval.s;          }
1134         |       LONG
1135                 {       $$ = yylval.s;          }
1136         |       FLOAT
1137                 {       $$ = yylval.s;          }
1138         |       DOUBLE
1139                 {       $$ = yylval.s;          }
1140         |       SIGNED
1141                 {       $$ = yylval.s;          }
1142         |       UNSIGNED
1143                 {       $$ = yylval.s;          }
1144         |       _BOOL
1145                 {       $$ = yylval.s;          }
1146         |       _COMPLEX
1147                 {       $$ = yylval.s;          }
1148         |       _IMAGINARY
1149                 {       $$ = yylval.s;          }
1150         |       FLOATING_POINT
1151                 {       $$ = yylval.s;          }
1152         |       INTEGER
1153                 {       $$ = yylval.s;          }
1154         |       STRING
1155                 {       $$ = yylval.s;          }
1156         |       ENUM
1157                 {       $$ = yylval.s;          }
1158         |       VARIANT
1159                 {       $$ = yylval.s;          }
1160         |       STRUCT
1161                 {       $$ = yylval.s;          }
1162         |       CONST
1163                 {       $$ = yylval.s;          }
1164         |       TYPEDEF
1165                 {       $$ = yylval.s;          }
1166         |       EVENT
1167                 {       $$ = yylval.s;          }
1168         |       STREAM
1169                 {       $$ = yylval.s;          }
1170         |       ENV
1171                 {       $$ = yylval.s;          }
1172         |       TRACE
1173                 {       $$ = yylval.s;          }
1174         |       CLOCK
1175                 {       $$ = yylval.s;          }
1176         |       CALLSITE
1177                 {       $$ = yylval.s;          }
1178         |       TOK_ALIGN
1179                 {       $$ = yylval.s;          }
1180         ;
1181
1182
1183 /* 2: Phrase structure grammar */
1184
1185 postfix_expression:
1186                 IDENTIFIER
1187                 {
1188                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1189                         $$->u.unary_expression.type = UNARY_STRING;
1190                         $$->u.unary_expression.u.string = yylval.s;
1191                 }
1192         |       ID_TYPE
1193                 {
1194                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1195                         $$->u.unary_expression.type = UNARY_STRING;
1196                         $$->u.unary_expression.u.string = yylval.s;
1197                 }
1198         |       keywords
1199                 {
1200                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1201                         $$->u.unary_expression.type = UNARY_STRING;
1202                         $$->u.unary_expression.u.string = yylval.s;
1203                 }
1204         |       INTEGER_LITERAL
1205                 {
1206                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1207                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1208                         $$->u.unary_expression.u.unsigned_constant = $1;
1209                 }
1210         |       STRING_LITERAL
1211                 {
1212                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1213                         $$->u.unary_expression.type = UNARY_STRING;
1214                         $$->u.unary_expression.u.string = $1;
1215                 }
1216         |       CHARACTER_LITERAL
1217                 {
1218                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1219                         $$->u.unary_expression.type = UNARY_STRING;
1220                         $$->u.unary_expression.u.string = $1;
1221                 }
1222         |       LPAREN unary_expression RPAREN
1223                 {
1224                         $$ = $2;
1225                 }
1226         |       postfix_expression LSBRAC unary_expression RSBRAC
1227                 {
1228                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1229                         $$->u.unary_expression.type = UNARY_SBRAC;
1230                         $$->u.unary_expression.u.sbrac_exp = $3;
1231                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1232                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1233                 }
1234         |       postfix_expression DOT IDENTIFIER
1235                 {
1236                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1237                         $$->u.unary_expression.type = UNARY_STRING;
1238                         $$->u.unary_expression.u.string = yylval.s;
1239                         $$->u.unary_expression.link = UNARY_DOTLINK;
1240                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1241                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1242                 }
1243         |       postfix_expression DOT ID_TYPE
1244                 {
1245                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1246                         $$->u.unary_expression.type = UNARY_STRING;
1247                         $$->u.unary_expression.u.string = yylval.s;
1248                         $$->u.unary_expression.link = UNARY_DOTLINK;
1249                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1250                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1251                 }
1252         |       postfix_expression RARROW IDENTIFIER
1253                 {
1254                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1255                         $$->u.unary_expression.type = UNARY_STRING;
1256                         $$->u.unary_expression.u.string = yylval.s;
1257                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1258                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1259                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1260                 }
1261         |       postfix_expression RARROW ID_TYPE
1262                 {
1263                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1264                         $$->u.unary_expression.type = UNARY_STRING;
1265                         $$->u.unary_expression.u.string = yylval.s;
1266                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1267                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1268                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1269                 }
1270         ;
1271
1272 unary_expression:
1273                 postfix_expression
1274                 {       $$ = $1;                                }
1275         |       PLUS postfix_expression
1276                 {
1277                         $$ = $2;
1278                         if ($$->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT
1279                                 && $$->u.unary_expression.type != UNARY_SIGNED_CONSTANT) {
1280                                 reparent_error(scanner, "expecting numeric constant");
1281                         }
1282                 }
1283         |       MINUS postfix_expression
1284                 {
1285                         $$ = $2;
1286                         if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1287                                 $$->u.unary_expression.type = UNARY_SIGNED_CONSTANT;
1288                                 $$->u.unary_expression.u.signed_constant =
1289                                         -($$->u.unary_expression.u.unsigned_constant);
1290                         } else if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1291                                 $$->u.unary_expression.u.signed_constant =
1292                                         -($$->u.unary_expression.u.signed_constant);
1293                         } else {
1294                                 reparent_error(scanner, "expecting numeric constant");
1295                         }
1296                 }
1297         ;
1298
1299 unary_expression_or_range:
1300                 unary_expression DOTDOTDOT unary_expression
1301                 {
1302                         $$ = $1;
1303                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->tmp_head);
1304                         $3->u.unary_expression.link = UNARY_DOTDOTDOT;
1305                 }
1306         |       unary_expression
1307                 {       $$ = $1;                }
1308         ;
1309
1310 /* 2.2: Declarations */
1311
1312 declaration:
1313                 declaration_specifiers SEMICOLON
1314                 {       $$ = $1;        }
1315         |       event_declaration
1316                 {       $$ = $1;        }
1317         |       stream_declaration
1318                 {       $$ = $1;        }
1319         |       env_declaration
1320                 {       $$ = $1;        }
1321         |       trace_declaration
1322                 {       $$ = $1;        }
1323         |       clock_declaration
1324                 {       $$ = $1;        }
1325         |       callsite_declaration
1326                 {       $$ = $1;        }
1327         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1328                 {
1329                         struct ctf_node *list;
1330
1331                         $$ = make_node(scanner, NODE_TYPEDEF);
1332                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1333                         $$->u._typedef.type_specifier_list = list;
1334                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1335                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1336                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
1337                 }
1338         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1339                 {
1340                         struct ctf_node *list;
1341
1342                         $$ = make_node(scanner, NODE_TYPEDEF);
1343                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1344                         $$->u._typedef.type_specifier_list = list;
1345                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1346                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1347                 }
1348         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
1349                 {
1350                         struct ctf_node *list;
1351
1352                         $$ = make_node(scanner, NODE_TYPEDEF);
1353                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1354                         $$->u._typedef.type_specifier_list = list;
1355                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1356                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1357                 }
1358         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
1359                 {
1360                         struct ctf_node *list;
1361
1362                         $$ = make_node(scanner, NODE_TYPEALIAS);
1363                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
1364                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
1365
1366                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1367                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
1368                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1369                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
1370
1371                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1372                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
1373                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1374                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
1375                 }
1376         ;
1377
1378 event_declaration:
1379                 event_declaration_begin event_declaration_end
1380                 {
1381                         $$ = make_node(scanner, NODE_EVENT);
1382                 }
1383         |       event_declaration_begin ctf_assignment_expression_list event_declaration_end
1384                 {
1385                         $$ = make_node(scanner, NODE_EVENT);
1386                         if (set_parent_node($2, $$))
1387                                 reparent_error(scanner, "event_declaration");
1388                 }
1389         ;
1390
1391 event_declaration_begin:
1392                 EVENT LBRAC
1393                 {       push_scope(scanner);    }
1394         ;
1395
1396 event_declaration_end:
1397                 RBRAC SEMICOLON
1398                 {       pop_scope(scanner);     }
1399         ;
1400
1401
1402 stream_declaration:
1403                 stream_declaration_begin stream_declaration_end
1404                 {
1405                         $$ = make_node(scanner, NODE_STREAM);
1406                 }
1407         |       stream_declaration_begin ctf_assignment_expression_list stream_declaration_end
1408                 {
1409                         $$ = make_node(scanner, NODE_STREAM);
1410                         if (set_parent_node($2, $$))
1411                                 reparent_error(scanner, "stream_declaration");
1412                 }
1413         ;
1414
1415 stream_declaration_begin:
1416                 STREAM LBRAC
1417                 {       push_scope(scanner);    }
1418         ;
1419
1420 stream_declaration_end:
1421                 RBRAC SEMICOLON
1422                 {       pop_scope(scanner);     }
1423         ;
1424
1425 env_declaration:
1426                 env_declaration_begin env_declaration_end
1427                 {
1428                         $$ = make_node(scanner, NODE_ENV);
1429                 }
1430         |       env_declaration_begin ctf_assignment_expression_list env_declaration_end
1431                 {
1432                         $$ = make_node(scanner, NODE_ENV);
1433                         if (set_parent_node($2, $$))
1434                                 reparent_error(scanner, "env declaration");
1435                 }
1436         ;
1437
1438 env_declaration_begin:
1439                 ENV LBRAC
1440                 {       push_scope(scanner);    }
1441         ;
1442
1443 env_declaration_end:
1444                 RBRAC SEMICOLON
1445                 {       pop_scope(scanner);     }
1446         ;
1447
1448 trace_declaration:
1449                 trace_declaration_begin trace_declaration_end
1450                 {
1451                         $$ = make_node(scanner, NODE_TRACE);
1452                 }
1453         |       trace_declaration_begin ctf_assignment_expression_list trace_declaration_end
1454                 {
1455                         $$ = make_node(scanner, NODE_TRACE);
1456                         if (set_parent_node($2, $$))
1457                                 reparent_error(scanner, "trace_declaration");
1458                 }
1459         ;
1460
1461 trace_declaration_begin:
1462                 TRACE LBRAC
1463                 {       push_scope(scanner);    }
1464         ;
1465
1466 trace_declaration_end:
1467                 RBRAC SEMICOLON
1468                 {       pop_scope(scanner);     }
1469         ;
1470
1471 clock_declaration:
1472                 CLOCK clock_declaration_begin clock_declaration_end
1473                 {
1474                         $$ = make_node(scanner, NODE_CLOCK);
1475                 }
1476         |       CLOCK clock_declaration_begin ctf_assignment_expression_list clock_declaration_end
1477                 {
1478                         $$ = make_node(scanner, NODE_CLOCK);
1479                         if (set_parent_node($3, $$))
1480                                 reparent_error(scanner, "trace_declaration");
1481                 }
1482         ;
1483
1484 clock_declaration_begin:
1485                 LBRAC
1486                 {       push_scope(scanner);    }
1487         ;
1488
1489 clock_declaration_end:
1490                 RBRAC SEMICOLON
1491                 {       pop_scope(scanner);     }
1492         ;
1493
1494 callsite_declaration:
1495                 CALLSITE callsite_declaration_begin callsite_declaration_end
1496                 {
1497                         $$ = make_node(scanner, NODE_CALLSITE);
1498                 }
1499         |       CALLSITE callsite_declaration_begin ctf_assignment_expression_list callsite_declaration_end
1500                 {
1501                         $$ = make_node(scanner, NODE_CALLSITE);
1502                         if (set_parent_node($3, $$))
1503                                 reparent_error(scanner, "trace_declaration");
1504                 }
1505         ;
1506
1507 callsite_declaration_begin:
1508                 LBRAC
1509                 {       push_scope(scanner);    }
1510         ;
1511
1512 callsite_declaration_end:
1513                 RBRAC SEMICOLON
1514                 {       pop_scope(scanner);     }
1515         ;
1516
1517 integer_declaration_specifiers:
1518                 CONST
1519                 {
1520                         struct ctf_node *node;
1521
1522                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1523                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1524                         node->u.type_specifier.type = TYPESPEC_CONST;
1525                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1526                 }
1527         |       integer_type_specifier
1528                 {
1529                         struct ctf_node *node;
1530
1531                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1532                         node = $1;
1533                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1534                 }
1535         |       integer_declaration_specifiers CONST
1536                 {
1537                         struct ctf_node *node;
1538
1539                         $$ = $1;
1540                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1541                         node->u.type_specifier.type = TYPESPEC_CONST;
1542                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1543                 }
1544         |       integer_declaration_specifiers integer_type_specifier
1545                 {
1546                         $$ = $1;
1547                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1548                 }
1549         ;
1550
1551 declaration_specifiers:
1552                 CONST
1553                 {
1554                         struct ctf_node *node;
1555
1556                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1557                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1558                         node->u.type_specifier.type = TYPESPEC_CONST;
1559                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1560                 }
1561         |       type_specifier
1562                 {
1563                         struct ctf_node *node;
1564
1565                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1566                         node = $1;
1567                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1568                 }
1569         |       declaration_specifiers CONST
1570                 {
1571                         struct ctf_node *node;
1572
1573                         $$ = $1;
1574                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1575                         node->u.type_specifier.type = TYPESPEC_CONST;
1576                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1577                 }
1578         |       declaration_specifiers type_specifier
1579                 {
1580                         $$ = $1;
1581                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1582                 }
1583         ;
1584
1585 type_declarator_list:
1586                 type_declarator
1587                 {       $$ = $1;        }
1588         |       type_declarator_list COMMA type_declarator
1589                 {
1590                         $$ = $1;
1591                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1592                 }
1593         ;
1594
1595 integer_type_specifier:
1596                 CHAR
1597                 {
1598                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1599                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1600                 }
1601         |       SHORT
1602                 {
1603                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1604                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1605                 }
1606         |       INT
1607                 {
1608                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1609                         $$->u.type_specifier.type = TYPESPEC_INT;
1610                 }
1611         |       LONG
1612                 {
1613                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1614                         $$->u.type_specifier.type = TYPESPEC_LONG;
1615                 }
1616         |       SIGNED
1617                 {
1618                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1619                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1620                 }
1621         |       UNSIGNED
1622                 {
1623                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1624                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1625                 }
1626         |       _BOOL
1627                 {
1628                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1629                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1630                 }
1631         |       ID_TYPE
1632                 {
1633                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1634                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1635                         $$->u.type_specifier.id_type = yylval.s;
1636                 }
1637         |       INTEGER LBRAC RBRAC
1638                 {
1639                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1640                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1641                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1642                 }
1643         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1644                 {
1645                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1646                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1647                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1648                         if (set_parent_node($3, $$->u.type_specifier.node))
1649                                 reparent_error(scanner, "integer reparent error");
1650                 }
1651         ;
1652
1653 type_specifier:
1654                 VOID
1655                 {
1656                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1657                         $$->u.type_specifier.type = TYPESPEC_VOID;
1658                 }
1659         |       CHAR
1660                 {
1661                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1662                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1663                 }
1664         |       SHORT
1665                 {
1666                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1667                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1668                 }
1669         |       INT
1670                 {
1671                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1672                         $$->u.type_specifier.type = TYPESPEC_INT;
1673                 }
1674         |       LONG
1675                 {
1676                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1677                         $$->u.type_specifier.type = TYPESPEC_LONG;
1678                 }
1679         |       FLOAT
1680                 {
1681                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1682                         $$->u.type_specifier.type = TYPESPEC_FLOAT;
1683                 }
1684         |       DOUBLE
1685                 {
1686                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1687                         $$->u.type_specifier.type = TYPESPEC_DOUBLE;
1688                 }
1689         |       SIGNED
1690                 {
1691                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1692                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1693                 }
1694         |       UNSIGNED
1695                 {
1696                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1697                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1698                 }
1699         |       _BOOL
1700                 {
1701                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1702                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1703                 }
1704         |       _COMPLEX
1705                 {
1706                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1707                         $$->u.type_specifier.type = TYPESPEC_COMPLEX;
1708                 }
1709         |       _IMAGINARY
1710                 {
1711                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1712                         $$->u.type_specifier.type = TYPESPEC_IMAGINARY;
1713                 }
1714         |       ID_TYPE
1715                 {
1716                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1717                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1718                         $$->u.type_specifier.id_type = yylval.s;
1719                 }
1720         |       FLOATING_POINT LBRAC RBRAC
1721                 {
1722                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1723                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1724                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1725                 }
1726         |       FLOATING_POINT LBRAC ctf_assignment_expression_list RBRAC
1727                 {
1728                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1729                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1730                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1731                         if (set_parent_node($3, $$->u.type_specifier.node))
1732                                 reparent_error(scanner, "floating point reparent error");
1733                 }
1734         |       INTEGER LBRAC RBRAC
1735                 {
1736                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1737                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1738                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1739                 }
1740         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1741                 {
1742                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1743                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1744                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1745                         if (set_parent_node($3, $$->u.type_specifier.node))
1746                                 reparent_error(scanner, "integer reparent error");
1747                 }
1748         |       STRING
1749                 {
1750                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1751                         $$->u.type_specifier.type = TYPESPEC_STRING;
1752                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1753                 }
1754         |       STRING LBRAC RBRAC
1755                 {
1756                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1757                         $$->u.type_specifier.type = TYPESPEC_STRING;
1758                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1759                 }
1760         |       STRING LBRAC ctf_assignment_expression_list RBRAC
1761                 {
1762                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1763                         $$->u.type_specifier.type = TYPESPEC_STRING;
1764                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1765                         if (set_parent_node($3, $$->u.type_specifier.node))
1766                                 reparent_error(scanner, "string reparent error");
1767                 }
1768         |       ENUM enum_type_specifier
1769                 {
1770                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1771                         $$->u.type_specifier.type = TYPESPEC_ENUM;
1772                         $$->u.type_specifier.node = $2;
1773                 }
1774         |       VARIANT variant_type_specifier
1775                 {
1776                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1777                         $$->u.type_specifier.type = TYPESPEC_VARIANT;
1778                         $$->u.type_specifier.node = $2;
1779                 }
1780         |       STRUCT struct_type_specifier
1781                 {
1782                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1783                         $$->u.type_specifier.type = TYPESPEC_STRUCT;
1784                         $$->u.type_specifier.node = $2;
1785                 }
1786         ;
1787
1788 struct_type_specifier:
1789                 struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1790                 {
1791                         $$ = make_node(scanner, NODE_STRUCT);
1792                         $$->u._struct.has_body = 1;
1793                         if ($2 && set_parent_node($2, $$))
1794                                 reparent_error(scanner, "struct reparent error");
1795                 }
1796         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1797                 {
1798                         $$ = make_node(scanner, NODE_STRUCT);
1799                         $$->u._struct.has_body = 1;
1800                         $$->u._struct.name = $1;
1801                         if ($3 && set_parent_node($3, $$))
1802                                 reparent_error(scanner, "struct reparent error");
1803                 }
1804         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1805                 {
1806                         $$ = make_node(scanner, NODE_STRUCT);
1807                         $$->u._struct.has_body = 1;
1808                         $$->u._struct.name = $1;
1809                         if ($3 && set_parent_node($3, $$))
1810                                 reparent_error(scanner, "struct reparent error");
1811                 }
1812         |       IDENTIFIER
1813                 {
1814                         $$ = make_node(scanner, NODE_STRUCT);
1815                         $$->u._struct.has_body = 0;
1816                         $$->u._struct.name = $1;
1817                 }
1818         |       ID_TYPE
1819                 {
1820                         $$ = make_node(scanner, NODE_STRUCT);
1821                         $$->u._struct.has_body = 0;
1822                         $$->u._struct.name = $1;
1823                 }
1824         |       struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1825                 {
1826                         $$ = make_node(scanner, NODE_STRUCT);
1827                         $$->u._struct.has_body = 1;
1828                         bt_list_add_tail(&($6)->siblings, &$$->u._struct.min_align);
1829                         if ($2 && set_parent_node($2, $$))
1830                                 reparent_error(scanner, "struct reparent error");
1831                 }
1832         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1833                 {
1834                         $$ = make_node(scanner, NODE_STRUCT);
1835                         $$->u._struct.has_body = 1;
1836                         $$->u._struct.name = $1;
1837                         bt_list_add_tail(&($7)->siblings, &$$->u._struct.min_align);
1838                         if ($3 && set_parent_node($3, $$))
1839                                 reparent_error(scanner, "struct reparent error");
1840                 }
1841         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1842                 {
1843                         $$ = make_node(scanner, NODE_STRUCT);
1844                         $$->u._struct.has_body = 1;
1845                         $$->u._struct.name = $1;
1846                         bt_list_add_tail(&($7)->siblings, &$$->u._struct.min_align);
1847                         if ($3 && set_parent_node($3, $$))
1848                                 reparent_error(scanner, "struct reparent error");
1849                 }
1850         ;
1851
1852 struct_declaration_begin:
1853                 LBRAC
1854                 {       push_scope(scanner);    }
1855         ;
1856
1857 struct_declaration_end:
1858                 RBRAC
1859                 {       pop_scope(scanner);     }
1860         ;
1861
1862 variant_type_specifier:
1863                 variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1864                 {
1865                         $$ = make_node(scanner, NODE_VARIANT);
1866                         $$->u.variant.has_body = 1;
1867                         if ($2 && set_parent_node($2, $$))
1868                                 reparent_error(scanner, "variant reparent error");
1869                 }
1870         |       LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1871                 {
1872                         $$ = make_node(scanner, NODE_VARIANT);
1873                         $$->u.variant.has_body = 1;
1874                         $$->u.variant.choice = $2;
1875                         if ($5 && set_parent_node($5, $$))
1876                                 reparent_error(scanner, "variant reparent error");
1877                 }
1878         |       LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1879                 {
1880                         $$ = make_node(scanner, NODE_VARIANT);
1881                         $$->u.variant.has_body = 1;
1882                         $$->u.variant.choice = $2;
1883                         if ($5 && set_parent_node($5, $$))
1884                                 reparent_error(scanner, "variant reparent error");
1885                 }
1886         |       IDENTIFIER variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1887                 {
1888                         $$ = make_node(scanner, NODE_VARIANT);
1889                         $$->u.variant.has_body = 1;
1890                         $$->u.variant.name = $1;
1891                         if ($3 && set_parent_node($3, $$))
1892                                 reparent_error(scanner, "variant reparent error");
1893                 }
1894         |       IDENTIFIER LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1895                 {
1896                         $$ = make_node(scanner, NODE_VARIANT);
1897                         $$->u.variant.has_body = 1;
1898                         $$->u.variant.name = $1;
1899                         $$->u.variant.choice = $3;
1900                         if ($6 && set_parent_node($6, $$))
1901                                 reparent_error(scanner, "variant reparent error");
1902                 }
1903         |       IDENTIFIER LT IDENTIFIER GT
1904                 {
1905                         $$ = make_node(scanner, NODE_VARIANT);
1906                         $$->u.variant.has_body = 0;
1907                         $$->u.variant.name = $1;
1908                         $$->u.variant.choice = $3;
1909                 }
1910         |       IDENTIFIER LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1911                 {
1912                         $$ = make_node(scanner, NODE_VARIANT);
1913                         $$->u.variant.has_body = 1;
1914                         $$->u.variant.name = $1;
1915                         $$->u.variant.choice = $3;
1916                         if ($6 && set_parent_node($6, $$))
1917                                 reparent_error(scanner, "variant reparent error");
1918                 }
1919         |       IDENTIFIER LT ID_TYPE GT
1920                 {
1921                         $$ = make_node(scanner, NODE_VARIANT);
1922                         $$->u.variant.has_body = 0;
1923                         $$->u.variant.name = $1;
1924                         $$->u.variant.choice = $3;
1925                 }
1926         |       ID_TYPE variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1927                 {
1928                         $$ = make_node(scanner, NODE_VARIANT);
1929                         $$->u.variant.has_body = 1;
1930                         $$->u.variant.name = $1;
1931                         if ($3 && set_parent_node($3, $$))
1932                                 reparent_error(scanner, "variant reparent error");
1933                 }
1934         |       ID_TYPE LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1935                 {
1936                         $$ = make_node(scanner, NODE_VARIANT);
1937                         $$->u.variant.has_body = 1;
1938                         $$->u.variant.name = $1;
1939                         $$->u.variant.choice = $3;
1940                         if ($6 && set_parent_node($6, $$))
1941                                 reparent_error(scanner, "variant reparent error");
1942                 }
1943         |       ID_TYPE LT IDENTIFIER GT
1944                 {
1945                         $$ = make_node(scanner, NODE_VARIANT);
1946                         $$->u.variant.has_body = 0;
1947                         $$->u.variant.name = $1;
1948                         $$->u.variant.choice = $3;
1949                 }
1950         |       ID_TYPE LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1951                 {
1952                         $$ = make_node(scanner, NODE_VARIANT);
1953                         $$->u.variant.has_body = 1;
1954                         $$->u.variant.name = $1;
1955                         $$->u.variant.choice = $3;
1956                         if ($6 && set_parent_node($6, $$))
1957                                 reparent_error(scanner, "variant reparent error");
1958                 }
1959         |       ID_TYPE LT ID_TYPE GT
1960                 {
1961                         $$ = make_node(scanner, NODE_VARIANT);
1962                         $$->u.variant.has_body = 0;
1963                         $$->u.variant.name = $1;
1964                         $$->u.variant.choice = $3;
1965                 }
1966         ;
1967
1968 variant_declaration_begin:
1969                 LBRAC
1970                 {       push_scope(scanner);    }
1971         ;
1972
1973 variant_declaration_end:
1974                 RBRAC
1975                 {       pop_scope(scanner);     }
1976         ;
1977
1978 enum_type_specifier:
1979                 LBRAC enumerator_list RBRAC
1980                 {
1981                         $$ = make_node(scanner, NODE_ENUM);
1982                         $$->u._enum.has_body = 1;
1983                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
1984                 }
1985         |       COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
1986                 {
1987                         $$ = make_node(scanner, NODE_ENUM);
1988                         $$->u._enum.has_body = 1;
1989                         ($$)->u._enum.container_type = $2;
1990                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
1991                 }
1992         |       IDENTIFIER LBRAC enumerator_list RBRAC
1993                 {
1994                         $$ = make_node(scanner, NODE_ENUM);
1995                         $$->u._enum.has_body = 1;
1996                         $$->u._enum.enum_id = $1;
1997                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
1998                 }
1999         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
2000                 {
2001                         $$ = make_node(scanner, NODE_ENUM);
2002                         $$->u._enum.has_body = 1;
2003                         $$->u._enum.enum_id = $1;
2004                         ($$)->u._enum.container_type = $3;
2005                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2006                 }
2007         |       ID_TYPE LBRAC enumerator_list RBRAC
2008                 {
2009                         $$ = make_node(scanner, NODE_ENUM);
2010                         $$->u._enum.has_body = 1;
2011                         $$->u._enum.enum_id = $1;
2012                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2013                 }
2014         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
2015                 {
2016                         $$ = make_node(scanner, NODE_ENUM);
2017                         $$->u._enum.has_body = 1;
2018                         $$->u._enum.enum_id = $1;
2019                         ($$)->u._enum.container_type = $3;
2020                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2021                 }
2022         |       LBRAC enumerator_list COMMA RBRAC
2023                 {
2024                         $$ = make_node(scanner, NODE_ENUM);
2025                         $$->u._enum.has_body = 1;
2026                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
2027                 }
2028         |       COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2029                 {
2030                         $$ = make_node(scanner, NODE_ENUM);
2031                         $$->u._enum.has_body = 1;
2032                         ($$)->u._enum.container_type = $2;
2033                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
2034                 }
2035         |       IDENTIFIER LBRAC enumerator_list COMMA RBRAC
2036                 {
2037                         $$ = make_node(scanner, NODE_ENUM);
2038                         $$->u._enum.has_body = 1;
2039                         $$->u._enum.enum_id = $1;
2040                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2041                 }
2042         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2043                 {
2044                         $$ = make_node(scanner, NODE_ENUM);
2045                         $$->u._enum.has_body = 1;
2046                         $$->u._enum.enum_id = $1;
2047                         ($$)->u._enum.container_type = $3;
2048                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2049                 }
2050         |       IDENTIFIER
2051                 {
2052                         $$ = make_node(scanner, NODE_ENUM);
2053                         $$->u._enum.has_body = 0;
2054                         $$->u._enum.enum_id = $1;
2055                 }
2056         |       ID_TYPE LBRAC enumerator_list COMMA RBRAC
2057                 {
2058                         $$ = make_node(scanner, NODE_ENUM);
2059                         $$->u._enum.has_body = 1;
2060                         $$->u._enum.enum_id = $1;
2061                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2062                 }
2063         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2064                 {
2065                         $$ = make_node(scanner, NODE_ENUM);
2066                         $$->u._enum.has_body = 1;
2067                         $$->u._enum.enum_id = $1;
2068                         ($$)->u._enum.container_type = $3;
2069                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2070                 }
2071         |       ID_TYPE
2072                 {
2073                         $$ = make_node(scanner, NODE_ENUM);
2074                         $$->u._enum.has_body = 0;
2075                         $$->u._enum.enum_id = $1;
2076                 }
2077         ;
2078
2079 struct_or_variant_declaration_list:
2080                 /* empty */
2081                 {       $$ = NULL;      }
2082         |       struct_or_variant_declaration_list struct_or_variant_declaration
2083                 {
2084                         if ($1) {
2085                                 $$ = $1;
2086                                 bt_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2087                         } else {
2088                                 $$ = $2;
2089                                 bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
2090                         }
2091                 }
2092         ;
2093
2094 struct_or_variant_declaration:
2095                 declaration_specifiers struct_or_variant_declarator_list SEMICOLON
2096                 {
2097                         struct ctf_node *list;
2098
2099                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2100                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2101                         $$ = make_node(scanner, NODE_STRUCT_OR_VARIANT_DECLARATION);
2102                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2103                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u.struct_or_variant_declaration.type_declarators);
2104                 }
2105         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
2106                 {
2107                         struct ctf_node *list;
2108
2109                         $$ = make_node(scanner, NODE_TYPEDEF);
2110                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2111                         $$->u._typedef.type_specifier_list = list;
2112                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2113                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2114                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2115                 }
2116         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
2117                 {
2118                         struct ctf_node *list;
2119
2120                         $$ = make_node(scanner, NODE_TYPEDEF);
2121                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2122                         $$->u._typedef.type_specifier_list = list;
2123                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2124                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2125                 }
2126         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
2127                 {
2128                         struct ctf_node *list;
2129
2130                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2131                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2132                         $$ = make_node(scanner, NODE_TYPEDEF);
2133                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2134                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2135                 }
2136         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
2137                 {
2138                         struct ctf_node *list;
2139
2140                         $$ = make_node(scanner, NODE_TYPEALIAS);
2141                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2142                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2143
2144                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2145                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2146                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2147                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2148
2149                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2150                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2151                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2152                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2153                 }
2154         ;
2155
2156 alias_declaration_specifiers:
2157                 CONST
2158                 {
2159                         struct ctf_node *node;
2160
2161                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2162                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2163                         node->u.type_specifier.type = TYPESPEC_CONST;
2164                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2165                 }
2166         |       type_specifier
2167                 {
2168                         struct ctf_node *node;
2169
2170                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2171                         node = $1;
2172                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2173                 }
2174         |       IDENTIFIER
2175                 {
2176                         struct ctf_node *node;
2177
2178                         add_type(scanner, $1);
2179                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2180                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2181                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
2182                         node->u.type_specifier.id_type = yylval.s;
2183                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2184                 }
2185         |       alias_declaration_specifiers CONST
2186                 {
2187                         struct ctf_node *node;
2188
2189                         $$ = $1;
2190                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2191                         node->u.type_specifier.type = TYPESPEC_CONST;
2192                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2193                 }
2194         |       alias_declaration_specifiers type_specifier
2195                 {
2196                         $$ = $1;
2197                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
2198                 }
2199         |       alias_declaration_specifiers IDENTIFIER
2200                 {
2201                         struct ctf_node *node;
2202
2203                         add_type(scanner, $2);
2204                         $$ = $1;
2205                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2206                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
2207                         node->u.type_specifier.id_type = yylval.s;
2208                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2209                 }
2210         ;
2211
2212 struct_or_variant_declarator_list:
2213                 struct_or_variant_declarator
2214                 {       $$ = $1;        }
2215         |       struct_or_variant_declarator_list COMMA struct_or_variant_declarator
2216                 {
2217                         $$ = $1;
2218                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2219                 }
2220         ;
2221
2222 struct_or_variant_declarator:
2223                 declarator
2224                 {       $$ = $1;        }
2225         |       COLON unary_expression
2226                 {       $$ = $2;        }
2227         |       declarator COLON unary_expression
2228                 {
2229                         $$ = $1;
2230                         if (set_parent_node($3, $1))
2231                                 reparent_error(scanner, "struct_or_variant_declarator");
2232                 }
2233         ;
2234
2235 enumerator_list:
2236                 enumerator
2237                 {       $$ = $1;        }
2238         |       enumerator_list COMMA enumerator
2239                 {
2240                         $$ = $1;
2241                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2242                 }
2243         ;
2244
2245 enumerator:
2246                 IDENTIFIER
2247                 {
2248                         $$ = make_node(scanner, NODE_ENUMERATOR);
2249                         $$->u.enumerator.id = $1;
2250                 }
2251         |       ID_TYPE
2252                 {
2253                         $$ = make_node(scanner, NODE_ENUMERATOR);
2254                         $$->u.enumerator.id = $1;
2255                 }
2256         |       keywords
2257                 {
2258                         $$ = make_node(scanner, NODE_ENUMERATOR);
2259                         $$->u.enumerator.id = $1;
2260                 }
2261         |       STRING_LITERAL
2262                 {
2263                         $$ = make_node(scanner, NODE_ENUMERATOR);
2264                         $$->u.enumerator.id = $1;
2265                 }
2266         |       IDENTIFIER EQUAL unary_expression_or_range
2267                 {
2268                         $$ = make_node(scanner, NODE_ENUMERATOR);
2269                         $$->u.enumerator.id = $1;
2270                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2271                 }
2272         |       ID_TYPE EQUAL unary_expression_or_range
2273                 {
2274                         $$ = make_node(scanner, NODE_ENUMERATOR);
2275                         $$->u.enumerator.id = $1;
2276                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2277                 }
2278         |       keywords EQUAL unary_expression_or_range
2279                 {
2280                         $$ = make_node(scanner, NODE_ENUMERATOR);
2281                         $$->u.enumerator.id = $1;
2282                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2283                 }
2284         |       STRING_LITERAL EQUAL unary_expression_or_range
2285                 {
2286                         $$ = make_node(scanner, NODE_ENUMERATOR);
2287                         $$->u.enumerator.id = $1;
2288                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2289                 }
2290         ;
2291
2292 abstract_declarator_list:
2293                 abstract_declarator
2294                 {       $$ = $1;        }
2295         |       abstract_declarator_list COMMA abstract_declarator
2296                 {
2297                         $$ = $1;
2298                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2299                 }
2300         ;
2301
2302 abstract_declarator:
2303                 direct_abstract_declarator
2304                 {       $$ = $1;        }
2305         |       pointer direct_abstract_declarator
2306                 {
2307                         $$ = $2;
2308                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2309                 }
2310         ;
2311
2312 direct_abstract_declarator:
2313                 /* empty */
2314                 {
2315                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2316                         $$->u.type_declarator.type = TYPEDEC_ID;
2317                         /* id is NULL */
2318                 }
2319         |       IDENTIFIER
2320                 {
2321                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2322                         $$->u.type_declarator.type = TYPEDEC_ID;
2323                         $$->u.type_declarator.u.id = $1;
2324                 }
2325         |       LPAREN abstract_declarator RPAREN
2326                 {
2327                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2328                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2329                         $$->u.type_declarator.u.nested.type_declarator = $2;
2330                 }
2331         |       direct_abstract_declarator LSBRAC unary_expression RSBRAC
2332                 {
2333                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2334                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2335                         $$->u.type_declarator.u.nested.type_declarator = $1;
2336                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2337                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2338                 }
2339         |       direct_abstract_declarator LSBRAC RSBRAC
2340                 {
2341                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2342                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2343                         $$->u.type_declarator.u.nested.type_declarator = $1;
2344                         $$->u.type_declarator.u.nested.abstract_array = 1;
2345                 }
2346         ;
2347
2348 alias_abstract_declarator_list:
2349                 alias_abstract_declarator
2350                 {       $$ = $1;        }
2351         |       alias_abstract_declarator_list COMMA alias_abstract_declarator
2352                 {
2353                         $$ = $1;
2354                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2355                 }
2356         ;
2357
2358 alias_abstract_declarator:
2359                 direct_alias_abstract_declarator
2360                 {       $$ = $1;        }
2361         |       pointer direct_alias_abstract_declarator
2362                 {
2363                         $$ = $2;
2364                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2365                 }
2366         ;
2367
2368 direct_alias_abstract_declarator:
2369                 /* empty */
2370                 {
2371                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2372                         $$->u.type_declarator.type = TYPEDEC_ID;
2373                         /* id is NULL */
2374                 }
2375         |       LPAREN alias_abstract_declarator RPAREN
2376                 {
2377                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2378                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2379                         $$->u.type_declarator.u.nested.type_declarator = $2;
2380                 }
2381         |       direct_alias_abstract_declarator LSBRAC unary_expression RSBRAC
2382                 {
2383                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2384                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2385                         $$->u.type_declarator.u.nested.type_declarator = $1;
2386                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2387                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2388                 }
2389         |       direct_alias_abstract_declarator LSBRAC RSBRAC
2390                 {
2391                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2392                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2393                         $$->u.type_declarator.u.nested.type_declarator = $1;
2394                         $$->u.type_declarator.u.nested.abstract_array = 1;
2395                 }
2396         ;
2397
2398 declarator:
2399                 direct_declarator
2400                 {       $$ = $1;        }
2401         |       pointer direct_declarator
2402                 {
2403                         $$ = $2;
2404                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2405                 }
2406         ;
2407
2408 direct_declarator:
2409                 IDENTIFIER
2410                 {
2411                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2412                         $$->u.type_declarator.type = TYPEDEC_ID;
2413                         $$->u.type_declarator.u.id = $1;
2414                 }
2415         |       LPAREN declarator RPAREN
2416                 {
2417                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2418                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2419                         $$->u.type_declarator.u.nested.type_declarator = $2;
2420                 }
2421         |       direct_declarator LSBRAC unary_expression RSBRAC
2422                 {
2423                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2424                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2425                         $$->u.type_declarator.u.nested.type_declarator = $1;
2426                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2427                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2428                 }
2429         ;
2430
2431 type_declarator:
2432                 direct_type_declarator
2433                 {       $$ = $1;        }
2434         |       pointer direct_type_declarator
2435                 {
2436                         $$ = $2;
2437                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2438                 }
2439         ;
2440
2441 direct_type_declarator:
2442                 IDENTIFIER
2443                 {
2444                         add_type(scanner, $1);
2445                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2446                         $$->u.type_declarator.type = TYPEDEC_ID;
2447                         $$->u.type_declarator.u.id = $1;
2448                 }
2449         |       LPAREN type_declarator RPAREN
2450                 {
2451                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2452                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2453                         $$->u.type_declarator.u.nested.type_declarator = $2;
2454                 }
2455         |       direct_type_declarator LSBRAC unary_expression RSBRAC
2456                 {
2457                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2458                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2459                         $$->u.type_declarator.u.nested.type_declarator = $1;
2460                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2461                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2462                 }
2463         ;
2464
2465 pointer:
2466                 STAR
2467                 {
2468                         $$ = make_node(scanner, NODE_POINTER);
2469                 }
2470         |       STAR pointer
2471                 {
2472                         $$ = make_node(scanner, NODE_POINTER);
2473                         bt_list_splice(&($2)->tmp_head, &($$)->tmp_head);
2474                 }
2475         |       STAR type_qualifier_list pointer
2476                 {
2477                         $$ = make_node(scanner, NODE_POINTER);
2478                         $$->u.pointer.const_qualifier = 1;
2479                         bt_list_splice(&($3)->tmp_head, &($$)->tmp_head);
2480                 }
2481         ;
2482
2483 type_qualifier_list:
2484                 /* pointer assumes only const type qualifier */
2485                 CONST
2486         |       type_qualifier_list CONST
2487         ;
2488
2489 /* 2.3: CTF-specific declarations */
2490
2491 ctf_assignment_expression_list:
2492                 ctf_assignment_expression SEMICOLON
2493                 {       $$ = $1;        }
2494         |       ctf_assignment_expression_list ctf_assignment_expression SEMICOLON
2495                 {
2496                         $$ = $1;
2497                         bt_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2498                 }
2499         ;
2500
2501 ctf_assignment_expression:
2502                 unary_expression EQUAL unary_expression
2503                 {
2504                         /*
2505                          * Because we have left and right, cannot use
2506                          * set_parent_node.
2507                          */
2508                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2509                         _bt_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2510                         if ($1->u.unary_expression.type != UNARY_STRING)
2511                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2512                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.ctf_expression.right);
2513                 }
2514         |       unary_expression TYPEASSIGN declaration_specifiers      /* Only allow struct */
2515                 {
2516                         /*
2517                          * Because we have left and right, cannot use
2518                          * set_parent_node.
2519                          */
2520                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2521                         _bt_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2522                         if ($1->u.unary_expression.type != UNARY_STRING)
2523                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2524                         bt_list_add_tail(&($3)->siblings, &($$)->u.ctf_expression.right);
2525                 }
2526         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list
2527                 {
2528                         struct ctf_node *list;
2529
2530                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2531                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2532                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2533                         $$ = make_node(scanner, NODE_TYPEDEF);
2534                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2535                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2536                 }
2537         |       TYPEDEF declaration_specifiers type_declarator_list
2538                 {
2539                         struct ctf_node *list;
2540
2541                         $$ = make_node(scanner, NODE_TYPEDEF);
2542                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2543                         $$->u._typedef.type_specifier_list = list;
2544                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2545                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2546                 }
2547         |       declaration_specifiers TYPEDEF type_declarator_list
2548                 {
2549                         struct ctf_node *list;
2550
2551                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2552                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2553                         $$ = make_node(scanner, NODE_TYPEDEF);
2554                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2555                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2556                 }
2557         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list
2558                 {
2559                         struct ctf_node *list;
2560
2561                         $$ = make_node(scanner, NODE_TYPEALIAS);
2562                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2563                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2564
2565                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2566                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2567                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2568                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2569
2570                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2571                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2572                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2573                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2574                 }
2575         ;