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)
 976 {
 977         return yyparse(scanner, scanner->scanner);
 978 }
 979
 980 struct ctf_scanner *ctf_scanner_alloc(FILE *input)
 981 {
 982         struct ctf_scanner *scanner;
 983         int ret;
 984
 985         yydebug = babeltrace_debug;
 986
 987         scanner = malloc(sizeof(*scanner));
 988         if (!scanner)
 989                 return NULL;
 990         memset(scanner, 0, sizeof(*scanner));
 991
 992         ret = yylex_init_extra(scanner, &scanner->scanner);
 993         if (ret) {
 994                 printf_fatal("yylex_init error");
 995                 goto cleanup_scanner;
 996         }
 997         /* Start processing new stream */
 998         yyrestart(input, scanner->scanner);
 999
1000         scanner->objstack = objstack_create();
1001         if (!scanner->objstack)
1002                 goto cleanup_lexer;
1003         scanner->ast = ctf_ast_alloc(scanner);
1004         if (!scanner->ast)
1005                 goto cleanup_objstack;
1006         init_scope(&scanner->root_scope, NULL);
1007         scanner->cs = &scanner->root_scope;
1008
1009         if (yydebug)
1010                 fprintf(stdout, "Scanner input is a%s.\n",
1011                         isatty(fileno(input)) ? "n interactive tty" :
1012                                                 " noninteractive file");
1013
1014         return scanner;
1015
1016 cleanup_objstack:
1017         objstack_destroy(scanner->objstack);
1018 cleanup_lexer:
1019         ret = yylex_destroy(scanner->scanner);
1020         if (!ret)
1021                 printf_fatal("yylex_destroy error");
1022 cleanup_scanner:
1023         free(scanner);
1024         return NULL;
1025 }
1026
1027 void ctf_scanner_free(struct ctf_scanner *scanner)
1028 {
1029         int ret;
1030
1031         finalize_scope(&scanner->root_scope);
1032         objstack_destroy(scanner->objstack);
1033         ret = yylex_destroy(scanner->scanner);
1034         if (ret)
1035                 printf_error("yylex_destroy error");
1036         free(scanner);
1037 }
1038
1039 %}
1040
1041 %define api.pure
1042         /* %locations */
1043 %error-verbose
1044 %parse-param {struct ctf_scanner *scanner}
1045 %parse-param {yyscan_t yyscanner}
1046 %lex-param {yyscan_t yyscanner}
1047 /*
1048  * Expect two shift-reduce conflicts. Caused by enum name-opt : type {}
1049  * vs struct { int :value; } (unnamed bit-field). The default is to
1050  * shift, so whenever we encounter an enumeration, we are doing the
1051  * proper thing (shift). It is illegal to declare an enumeration
1052  * "bit-field", so it is OK if this situation ends up in a parsing
1053  * error.
1054  */
1055 %expect 2
1056 %start file
1057 %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
1058 %token <s> IDENTIFIER ID_TYPE
1059 %token ERROR
1060 %union
1061 {
1062         long long ll;
1063         unsigned long long ull;
1064         char c;
1065         char *s;
1066         struct ctf_node *n;
1067 }
1068
1069 %type <s> STRING_LITERAL CHARACTER_LITERAL
1070
1071 %type <s> keywords
1072
1073 %type <ull> INTEGER_LITERAL
1074 %type <n> postfix_expression unary_expression unary_expression_or_range
1075
1076 %type <n> declaration
1077 %type <n> event_declaration
1078 %type <n> stream_declaration
1079 %type <n> env_declaration
1080 %type <n> trace_declaration
1081 %type <n> clock_declaration
1082 %type <n> callsite_declaration
1083 %type <n> integer_declaration_specifiers
1084 %type <n> declaration_specifiers
1085 %type <n> alias_declaration_specifiers
1086
1087 %type <n> type_declarator_list
1088 %type <n> integer_type_specifier
1089 %type <n> type_specifier
1090 %type <n> struct_type_specifier
1091 %type <n> variant_type_specifier
1092 %type <n> enum_type_specifier
1093 %type <n> struct_or_variant_declaration_list
1094 %type <n> struct_or_variant_declaration
1095 %type <n> struct_or_variant_declarator_list
1096 %type <n> struct_or_variant_declarator
1097 %type <n> enumerator_list
1098 %type <n> enumerator
1099 %type <n> abstract_declarator_list
1100 %type <n> abstract_declarator
1101 %type <n> direct_abstract_declarator
1102 %type <n> alias_abstract_declarator_list
1103 %type <n> alias_abstract_declarator
1104 %type <n> direct_alias_abstract_declarator
1105 %type <n> declarator
1106 %type <n> direct_declarator
1107 %type <n> type_declarator
1108 %type <n> direct_type_declarator
1109 %type <n> pointer
1110 %type <n> ctf_assignment_expression_list
1111 %type <n> ctf_assignment_expression
1112
1113 %%
1114
1115 file:
1116                 declaration
1117                 {
1118                         if (set_parent_node($1, &ctf_scanner_get_ast(scanner)->root))
1119                                 reparent_error(scanner, "error reparenting to root");
1120                 }
1121         |       file declaration
1122                 {
1123                         if (set_parent_node($2, &ctf_scanner_get_ast(scanner)->root))
1124                                 reparent_error(scanner, "error reparenting to root");
1125                 }
1126         ;
1127
1128 keywords:
1129                 VOID
1130                 {       $$ = yylval.s;          }
1131         |       CHAR
1132                 {       $$ = yylval.s;          }
1133         |       SHORT
1134                 {       $$ = yylval.s;          }
1135         |       INT
1136                 {       $$ = yylval.s;          }
1137         |       LONG
1138                 {       $$ = yylval.s;          }
1139         |       FLOAT
1140                 {       $$ = yylval.s;          }
1141         |       DOUBLE
1142                 {       $$ = yylval.s;          }
1143         |       SIGNED
1144                 {       $$ = yylval.s;          }
1145         |       UNSIGNED
1146                 {       $$ = yylval.s;          }
1147         |       _BOOL
1148                 {       $$ = yylval.s;          }
1149         |       _COMPLEX
1150                 {       $$ = yylval.s;          }
1151         |       _IMAGINARY
1152                 {       $$ = yylval.s;          }
1153         |       FLOATING_POINT
1154                 {       $$ = yylval.s;          }
1155         |       INTEGER
1156                 {       $$ = yylval.s;          }
1157         |       STRING
1158                 {       $$ = yylval.s;          }
1159         |       ENUM
1160                 {       $$ = yylval.s;          }
1161         |       VARIANT
1162                 {       $$ = yylval.s;          }
1163         |       STRUCT
1164                 {       $$ = yylval.s;          }
1165         |       CONST
1166                 {       $$ = yylval.s;          }
1167         |       TYPEDEF
1168                 {       $$ = yylval.s;          }
1169         |       EVENT
1170                 {       $$ = yylval.s;          }
1171         |       STREAM
1172                 {       $$ = yylval.s;          }
1173         |       ENV
1174                 {       $$ = yylval.s;          }
1175         |       TRACE
1176                 {       $$ = yylval.s;          }
1177         |       CLOCK
1178                 {       $$ = yylval.s;          }
1179         |       CALLSITE
1180                 {       $$ = yylval.s;          }
1181         |       TOK_ALIGN
1182                 {       $$ = yylval.s;          }
1183         ;
1184
1185
1186 /* 2: Phrase structure grammar */
1187
1188 postfix_expression:
1189                 IDENTIFIER
1190                 {
1191                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1192                         $$->u.unary_expression.type = UNARY_STRING;
1193                         $$->u.unary_expression.u.string = yylval.s;
1194                 }
1195         |       ID_TYPE
1196                 {
1197                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1198                         $$->u.unary_expression.type = UNARY_STRING;
1199                         $$->u.unary_expression.u.string = yylval.s;
1200                 }
1201         |       keywords
1202                 {
1203                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1204                         $$->u.unary_expression.type = UNARY_STRING;
1205                         $$->u.unary_expression.u.string = yylval.s;
1206                 }
1207         |       INTEGER_LITERAL
1208                 {
1209                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1210                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1211                         $$->u.unary_expression.u.unsigned_constant = $1;
1212                 }
1213         |       STRING_LITERAL
1214                 {
1215                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1216                         $$->u.unary_expression.type = UNARY_STRING;
1217                         $$->u.unary_expression.u.string = $1;
1218                 }
1219         |       CHARACTER_LITERAL
1220                 {
1221                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1222                         $$->u.unary_expression.type = UNARY_STRING;
1223                         $$->u.unary_expression.u.string = $1;
1224                 }
1225         |       LPAREN unary_expression RPAREN
1226                 {
1227                         $$ = $2;
1228                 }
1229         |       postfix_expression LSBRAC unary_expression RSBRAC
1230                 {
1231                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1232                         $$->u.unary_expression.type = UNARY_SBRAC;
1233                         $$->u.unary_expression.u.sbrac_exp = $3;
1234                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1235                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1236                 }
1237         |       postfix_expression DOT IDENTIFIER
1238                 {
1239                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1240                         $$->u.unary_expression.type = UNARY_STRING;
1241                         $$->u.unary_expression.u.string = yylval.s;
1242                         $$->u.unary_expression.link = UNARY_DOTLINK;
1243                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1244                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1245                 }
1246         |       postfix_expression DOT ID_TYPE
1247                 {
1248                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1249                         $$->u.unary_expression.type = UNARY_STRING;
1250                         $$->u.unary_expression.u.string = yylval.s;
1251                         $$->u.unary_expression.link = UNARY_DOTLINK;
1252                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1253                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1254                 }
1255         |       postfix_expression RARROW IDENTIFIER
1256                 {
1257                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1258                         $$->u.unary_expression.type = UNARY_STRING;
1259                         $$->u.unary_expression.u.string = yylval.s;
1260                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1261                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1262                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1263                 }
1264         |       postfix_expression RARROW ID_TYPE
1265                 {
1266                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1267                         $$->u.unary_expression.type = UNARY_STRING;
1268                         $$->u.unary_expression.u.string = yylval.s;
1269                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1270                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1271                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1272                 }
1273         ;
1274
1275 unary_expression:
1276                 postfix_expression
1277                 {       $$ = $1;                                }
1278         |       PLUS postfix_expression
1279                 {
1280                         $$ = $2;
1281                         if ($$->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT
1282                                 && $$->u.unary_expression.type != UNARY_SIGNED_CONSTANT) {
1283                                 reparent_error(scanner, "expecting numeric constant");
1284                         }
1285                 }
1286         |       MINUS postfix_expression
1287                 {
1288                         $$ = $2;
1289                         if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1290                                 $$->u.unary_expression.type = UNARY_SIGNED_CONSTANT;
1291                                 $$->u.unary_expression.u.signed_constant =
1292                                         -($$->u.unary_expression.u.unsigned_constant);
1293                         } else if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1294                                 $$->u.unary_expression.u.signed_constant =
1295                                         -($$->u.unary_expression.u.signed_constant);
1296                         } else {
1297                                 reparent_error(scanner, "expecting numeric constant");
1298                         }
1299                 }
1300         ;
1301
1302 unary_expression_or_range:
1303                 unary_expression DOTDOTDOT unary_expression
1304                 {
1305                         $$ = $1;
1306                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->tmp_head);
1307                         $3->u.unary_expression.link = UNARY_DOTDOTDOT;
1308                 }
1309         |       unary_expression
1310                 {       $$ = $1;                }
1311         ;
1312
1313 /* 2.2: Declarations */
1314
1315 declaration:
1316                 declaration_specifiers SEMICOLON
1317                 {       $$ = $1;        }
1318         |       event_declaration
1319                 {       $$ = $1;        }
1320         |       stream_declaration
1321                 {       $$ = $1;        }
1322         |       env_declaration
1323                 {       $$ = $1;        }
1324         |       trace_declaration
1325                 {       $$ = $1;        }
1326         |       clock_declaration
1327                 {       $$ = $1;        }
1328         |       callsite_declaration
1329                 {       $$ = $1;        }
1330         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1331                 {
1332                         struct ctf_node *list;
1333
1334                         $$ = make_node(scanner, NODE_TYPEDEF);
1335                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1336                         $$->u._typedef.type_specifier_list = list;
1337                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1338                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1339                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
1340                 }
1341         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1342                 {
1343                         struct ctf_node *list;
1344
1345                         $$ = make_node(scanner, NODE_TYPEDEF);
1346                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1347                         $$->u._typedef.type_specifier_list = list;
1348                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1349                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1350                 }
1351         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
1352                 {
1353                         struct ctf_node *list;
1354
1355                         $$ = make_node(scanner, NODE_TYPEDEF);
1356                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1357                         $$->u._typedef.type_specifier_list = list;
1358                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1359                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1360                 }
1361         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
1362                 {
1363                         struct ctf_node *list;
1364
1365                         $$ = make_node(scanner, NODE_TYPEALIAS);
1366                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
1367                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
1368
1369                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1370                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
1371                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1372                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
1373
1374                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1375                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
1376                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1377                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
1378                 }
1379         ;
1380
1381 event_declaration:
1382                 event_declaration_begin event_declaration_end
1383                 {
1384                         $$ = make_node(scanner, NODE_EVENT);
1385                 }
1386         |       event_declaration_begin ctf_assignment_expression_list event_declaration_end
1387                 {
1388                         $$ = make_node(scanner, NODE_EVENT);
1389                         if (set_parent_node($2, $$))
1390                                 reparent_error(scanner, "event_declaration");
1391                 }
1392         ;
1393
1394 event_declaration_begin:
1395                 EVENT LBRAC
1396                 {       push_scope(scanner);    }
1397         ;
1398
1399 event_declaration_end:
1400                 RBRAC SEMICOLON
1401                 {       pop_scope(scanner);     }
1402         ;
1403
1404
1405 stream_declaration:
1406                 stream_declaration_begin stream_declaration_end
1407                 {
1408                         $$ = make_node(scanner, NODE_STREAM);
1409                 }
1410         |       stream_declaration_begin ctf_assignment_expression_list stream_declaration_end
1411                 {
1412                         $$ = make_node(scanner, NODE_STREAM);
1413                         if (set_parent_node($2, $$))
1414                                 reparent_error(scanner, "stream_declaration");
1415                 }
1416         ;
1417
1418 stream_declaration_begin:
1419                 STREAM LBRAC
1420                 {       push_scope(scanner);    }
1421         ;
1422
1423 stream_declaration_end:
1424                 RBRAC SEMICOLON
1425                 {       pop_scope(scanner);     }
1426         ;
1427
1428 env_declaration:
1429                 env_declaration_begin env_declaration_end
1430                 {
1431                         $$ = make_node(scanner, NODE_ENV);
1432                 }
1433         |       env_declaration_begin ctf_assignment_expression_list env_declaration_end
1434                 {
1435                         $$ = make_node(scanner, NODE_ENV);
1436                         if (set_parent_node($2, $$))
1437                                 reparent_error(scanner, "env declaration");
1438                 }
1439         ;
1440
1441 env_declaration_begin:
1442                 ENV LBRAC
1443                 {       push_scope(scanner);    }
1444         ;
1445
1446 env_declaration_end:
1447                 RBRAC SEMICOLON
1448                 {       pop_scope(scanner);     }
1449         ;
1450
1451 trace_declaration:
1452                 trace_declaration_begin trace_declaration_end
1453                 {
1454                         $$ = make_node(scanner, NODE_TRACE);
1455                 }
1456         |       trace_declaration_begin ctf_assignment_expression_list trace_declaration_end
1457                 {
1458                         $$ = make_node(scanner, NODE_TRACE);
1459                         if (set_parent_node($2, $$))
1460                                 reparent_error(scanner, "trace_declaration");
1461                 }
1462         ;
1463
1464 trace_declaration_begin:
1465                 TRACE LBRAC
1466                 {       push_scope(scanner);    }
1467         ;
1468
1469 trace_declaration_end:
1470                 RBRAC SEMICOLON
1471                 {       pop_scope(scanner);     }
1472         ;
1473
1474 clock_declaration:
1475                 CLOCK clock_declaration_begin clock_declaration_end
1476                 {
1477                         $$ = make_node(scanner, NODE_CLOCK);
1478                 }
1479         |       CLOCK clock_declaration_begin ctf_assignment_expression_list clock_declaration_end
1480                 {
1481                         $$ = make_node(scanner, NODE_CLOCK);
1482                         if (set_parent_node($3, $$))
1483                                 reparent_error(scanner, "trace_declaration");
1484                 }
1485         ;
1486
1487 clock_declaration_begin:
1488                 LBRAC
1489                 {       push_scope(scanner);    }
1490         ;
1491
1492 clock_declaration_end:
1493                 RBRAC SEMICOLON
1494                 {       pop_scope(scanner);     }
1495         ;
1496
1497 callsite_declaration:
1498                 CALLSITE callsite_declaration_begin callsite_declaration_end
1499                 {
1500                         $$ = make_node(scanner, NODE_CALLSITE);
1501                 }
1502         |       CALLSITE callsite_declaration_begin ctf_assignment_expression_list callsite_declaration_end
1503                 {
1504                         $$ = make_node(scanner, NODE_CALLSITE);
1505                         if (set_parent_node($3, $$))
1506                                 reparent_error(scanner, "trace_declaration");
1507                 }
1508         ;
1509
1510 callsite_declaration_begin:
1511                 LBRAC
1512                 {       push_scope(scanner);    }
1513         ;
1514
1515 callsite_declaration_end:
1516                 RBRAC SEMICOLON
1517                 {       pop_scope(scanner);     }
1518         ;
1519
1520 integer_declaration_specifiers:
1521                 CONST
1522                 {
1523                         struct ctf_node *node;
1524
1525                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1526                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1527                         node->u.type_specifier.type = TYPESPEC_CONST;
1528                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1529                 }
1530         |       integer_type_specifier
1531                 {
1532                         struct ctf_node *node;
1533
1534                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1535                         node = $1;
1536                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1537                 }
1538         |       integer_declaration_specifiers CONST
1539                 {
1540                         struct ctf_node *node;
1541
1542                         $$ = $1;
1543                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1544                         node->u.type_specifier.type = TYPESPEC_CONST;
1545                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1546                 }
1547         |       integer_declaration_specifiers integer_type_specifier
1548                 {
1549                         $$ = $1;
1550                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1551                 }
1552         ;
1553
1554 declaration_specifiers:
1555                 CONST
1556                 {
1557                         struct ctf_node *node;
1558
1559                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1560                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1561                         node->u.type_specifier.type = TYPESPEC_CONST;
1562                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1563                 }
1564         |       type_specifier
1565                 {
1566                         struct ctf_node *node;
1567
1568                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1569                         node = $1;
1570                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1571                 }
1572         |       declaration_specifiers CONST
1573                 {
1574                         struct ctf_node *node;
1575
1576                         $$ = $1;
1577                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1578                         node->u.type_specifier.type = TYPESPEC_CONST;
1579                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1580                 }
1581         |       declaration_specifiers type_specifier
1582                 {
1583                         $$ = $1;
1584                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1585                 }
1586         ;
1587
1588 type_declarator_list:
1589                 type_declarator
1590                 {       $$ = $1;        }
1591         |       type_declarator_list COMMA type_declarator
1592                 {
1593                         $$ = $1;
1594                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1595                 }
1596         ;
1597
1598 integer_type_specifier:
1599                 CHAR
1600                 {
1601                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1602                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1603                 }
1604         |       SHORT
1605                 {
1606                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1607                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1608                 }
1609         |       INT
1610                 {
1611                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1612                         $$->u.type_specifier.type = TYPESPEC_INT;
1613                 }
1614         |       LONG
1615                 {
1616                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1617                         $$->u.type_specifier.type = TYPESPEC_LONG;
1618                 }
1619         |       SIGNED
1620                 {
1621                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1622                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1623                 }
1624         |       UNSIGNED
1625                 {
1626                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1627                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1628                 }
1629         |       _BOOL
1630                 {
1631                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1632                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1633                 }
1634         |       ID_TYPE
1635                 {
1636                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1637                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1638                         $$->u.type_specifier.id_type = yylval.s;
1639                 }
1640         |       INTEGER LBRAC RBRAC
1641                 {
1642                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1643                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1644                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1645                 }
1646         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1647                 {
1648                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1649                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1650                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1651                         if (set_parent_node($3, $$->u.type_specifier.node))
1652                                 reparent_error(scanner, "integer reparent error");
1653                 }
1654         ;
1655
1656 type_specifier:
1657                 VOID
1658                 {
1659                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1660                         $$->u.type_specifier.type = TYPESPEC_VOID;
1661                 }
1662         |       CHAR
1663                 {
1664                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1665                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1666                 }
1667         |       SHORT
1668                 {
1669                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1670                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1671                 }
1672         |       INT
1673                 {
1674                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1675                         $$->u.type_specifier.type = TYPESPEC_INT;
1676                 }
1677         |       LONG
1678                 {
1679                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1680                         $$->u.type_specifier.type = TYPESPEC_LONG;
1681                 }
1682         |       FLOAT
1683                 {
1684                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1685                         $$->u.type_specifier.type = TYPESPEC_FLOAT;
1686                 }
1687         |       DOUBLE
1688                 {
1689                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1690                         $$->u.type_specifier.type = TYPESPEC_DOUBLE;
1691                 }
1692         |       SIGNED
1693                 {
1694                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1695                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1696                 }
1697         |       UNSIGNED
1698                 {
1699                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1700                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1701                 }
1702         |       _BOOL
1703                 {
1704                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1705                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1706                 }
1707         |       _COMPLEX
1708                 {
1709                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1710                         $$->u.type_specifier.type = TYPESPEC_COMPLEX;
1711                 }
1712         |       _IMAGINARY
1713                 {
1714                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1715                         $$->u.type_specifier.type = TYPESPEC_IMAGINARY;
1716                 }
1717         |       ID_TYPE
1718                 {
1719                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1720                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1721                         $$->u.type_specifier.id_type = yylval.s;
1722                 }
1723         |       FLOATING_POINT LBRAC RBRAC
1724                 {
1725                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1726                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1727                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1728                 }
1729         |       FLOATING_POINT LBRAC ctf_assignment_expression_list RBRAC
1730                 {
1731                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1732                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1733                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1734                         if (set_parent_node($3, $$->u.type_specifier.node))
1735                                 reparent_error(scanner, "floating point reparent error");
1736                 }
1737         |       INTEGER LBRAC RBRAC
1738                 {
1739                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1740                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1741                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1742                 }
1743         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1744                 {
1745                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1746                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1747                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1748                         if (set_parent_node($3, $$->u.type_specifier.node))
1749                                 reparent_error(scanner, "integer reparent error");
1750                 }
1751         |       STRING
1752                 {
1753                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1754                         $$->u.type_specifier.type = TYPESPEC_STRING;
1755                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1756                 }
1757         |       STRING LBRAC RBRAC
1758                 {
1759                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1760                         $$->u.type_specifier.type = TYPESPEC_STRING;
1761                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1762                 }
1763         |       STRING LBRAC ctf_assignment_expression_list RBRAC
1764                 {
1765                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1766                         $$->u.type_specifier.type = TYPESPEC_STRING;
1767                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1768                         if (set_parent_node($3, $$->u.type_specifier.node))
1769                                 reparent_error(scanner, "string reparent error");
1770                 }
1771         |       ENUM enum_type_specifier
1772                 {
1773                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1774                         $$->u.type_specifier.type = TYPESPEC_ENUM;
1775                         $$->u.type_specifier.node = $2;
1776                 }
1777         |       VARIANT variant_type_specifier
1778                 {
1779                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1780                         $$->u.type_specifier.type = TYPESPEC_VARIANT;
1781                         $$->u.type_specifier.node = $2;
1782                 }
1783         |       STRUCT struct_type_specifier
1784                 {
1785                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1786                         $$->u.type_specifier.type = TYPESPEC_STRUCT;
1787                         $$->u.type_specifier.node = $2;
1788                 }
1789         ;
1790
1791 struct_type_specifier:
1792                 struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1793                 {
1794                         $$ = make_node(scanner, NODE_STRUCT);
1795                         $$->u._struct.has_body = 1;
1796                         if ($2 && set_parent_node($2, $$))
1797                                 reparent_error(scanner, "struct reparent error");
1798                 }
1799         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1800                 {
1801                         $$ = make_node(scanner, NODE_STRUCT);
1802                         $$->u._struct.has_body = 1;
1803                         $$->u._struct.name = $1;
1804                         if ($3 && set_parent_node($3, $$))
1805                                 reparent_error(scanner, "struct reparent error");
1806                 }
1807         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1808                 {
1809                         $$ = make_node(scanner, NODE_STRUCT);
1810                         $$->u._struct.has_body = 1;
1811                         $$->u._struct.name = $1;
1812                         if ($3 && set_parent_node($3, $$))
1813                                 reparent_error(scanner, "struct reparent error");
1814                 }
1815         |       IDENTIFIER
1816                 {
1817                         $$ = make_node(scanner, NODE_STRUCT);
1818                         $$->u._struct.has_body = 0;
1819                         $$->u._struct.name = $1;
1820                 }
1821         |       ID_TYPE
1822                 {
1823                         $$ = make_node(scanner, NODE_STRUCT);
1824                         $$->u._struct.has_body = 0;
1825                         $$->u._struct.name = $1;
1826                 }
1827         |       struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1828                 {
1829                         $$ = make_node(scanner, NODE_STRUCT);
1830                         $$->u._struct.has_body = 1;
1831                         bt_list_add_tail(&($6)->siblings, &$$->u._struct.min_align);
1832                         if ($2 && set_parent_node($2, $$))
1833                                 reparent_error(scanner, "struct reparent error");
1834                 }
1835         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1836                 {
1837                         $$ = make_node(scanner, NODE_STRUCT);
1838                         $$->u._struct.has_body = 1;
1839                         $$->u._struct.name = $1;
1840                         bt_list_add_tail(&($7)->siblings, &$$->u._struct.min_align);
1841                         if ($3 && set_parent_node($3, $$))
1842                                 reparent_error(scanner, "struct reparent error");
1843                 }
1844         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1845                 {
1846                         $$ = make_node(scanner, NODE_STRUCT);
1847                         $$->u._struct.has_body = 1;
1848                         $$->u._struct.name = $1;
1849                         bt_list_add_tail(&($7)->siblings, &$$->u._struct.min_align);
1850                         if ($3 && set_parent_node($3, $$))
1851                                 reparent_error(scanner, "struct reparent error");
1852                 }
1853         ;
1854
1855 struct_declaration_begin:
1856                 LBRAC
1857                 {       push_scope(scanner);    }
1858         ;
1859
1860 struct_declaration_end:
1861                 RBRAC
1862                 {       pop_scope(scanner);     }
1863         ;
1864
1865 variant_type_specifier:
1866                 variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1867                 {
1868                         $$ = make_node(scanner, NODE_VARIANT);
1869                         $$->u.variant.has_body = 1;
1870                         if ($2 && set_parent_node($2, $$))
1871                                 reparent_error(scanner, "variant reparent error");
1872                 }
1873         |       LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1874                 {
1875                         $$ = make_node(scanner, NODE_VARIANT);
1876                         $$->u.variant.has_body = 1;
1877                         $$->u.variant.choice = $2;
1878                         if ($5 && set_parent_node($5, $$))
1879                                 reparent_error(scanner, "variant reparent error");
1880                 }
1881         |       LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1882                 {
1883                         $$ = make_node(scanner, NODE_VARIANT);
1884                         $$->u.variant.has_body = 1;
1885                         $$->u.variant.choice = $2;
1886                         if ($5 && set_parent_node($5, $$))
1887                                 reparent_error(scanner, "variant reparent error");
1888                 }
1889         |       IDENTIFIER variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1890                 {
1891                         $$ = make_node(scanner, NODE_VARIANT);
1892                         $$->u.variant.has_body = 1;
1893                         $$->u.variant.name = $1;
1894                         if ($3 && set_parent_node($3, $$))
1895                                 reparent_error(scanner, "variant reparent error");
1896                 }
1897         |       IDENTIFIER LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1898                 {
1899                         $$ = make_node(scanner, NODE_VARIANT);
1900                         $$->u.variant.has_body = 1;
1901                         $$->u.variant.name = $1;
1902                         $$->u.variant.choice = $3;
1903                         if ($6 && set_parent_node($6, $$))
1904                                 reparent_error(scanner, "variant reparent error");
1905                 }
1906         |       IDENTIFIER LT IDENTIFIER GT
1907                 {
1908                         $$ = make_node(scanner, NODE_VARIANT);
1909                         $$->u.variant.has_body = 0;
1910                         $$->u.variant.name = $1;
1911                         $$->u.variant.choice = $3;
1912                 }
1913         |       IDENTIFIER LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1914                 {
1915                         $$ = make_node(scanner, NODE_VARIANT);
1916                         $$->u.variant.has_body = 1;
1917                         $$->u.variant.name = $1;
1918                         $$->u.variant.choice = $3;
1919                         if ($6 && set_parent_node($6, $$))
1920                                 reparent_error(scanner, "variant reparent error");
1921                 }
1922         |       IDENTIFIER LT ID_TYPE GT
1923                 {
1924                         $$ = make_node(scanner, NODE_VARIANT);
1925                         $$->u.variant.has_body = 0;
1926                         $$->u.variant.name = $1;
1927                         $$->u.variant.choice = $3;
1928                 }
1929         |       ID_TYPE variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1930                 {
1931                         $$ = make_node(scanner, NODE_VARIANT);
1932                         $$->u.variant.has_body = 1;
1933                         $$->u.variant.name = $1;
1934                         if ($3 && set_parent_node($3, $$))
1935                                 reparent_error(scanner, "variant reparent error");
1936                 }
1937         |       ID_TYPE LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1938                 {
1939                         $$ = make_node(scanner, NODE_VARIANT);
1940                         $$->u.variant.has_body = 1;
1941                         $$->u.variant.name = $1;
1942                         $$->u.variant.choice = $3;
1943                         if ($6 && set_parent_node($6, $$))
1944                                 reparent_error(scanner, "variant reparent error");
1945                 }
1946         |       ID_TYPE LT IDENTIFIER GT
1947                 {
1948                         $$ = make_node(scanner, NODE_VARIANT);
1949                         $$->u.variant.has_body = 0;
1950                         $$->u.variant.name = $1;
1951                         $$->u.variant.choice = $3;
1952                 }
1953         |       ID_TYPE LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1954                 {
1955                         $$ = make_node(scanner, NODE_VARIANT);
1956                         $$->u.variant.has_body = 1;
1957                         $$->u.variant.name = $1;
1958                         $$->u.variant.choice = $3;
1959                         if ($6 && set_parent_node($6, $$))
1960                                 reparent_error(scanner, "variant reparent error");
1961                 }
1962         |       ID_TYPE LT ID_TYPE GT
1963                 {
1964                         $$ = make_node(scanner, NODE_VARIANT);
1965                         $$->u.variant.has_body = 0;
1966                         $$->u.variant.name = $1;
1967                         $$->u.variant.choice = $3;
1968                 }
1969         ;
1970
1971 variant_declaration_begin:
1972                 LBRAC
1973                 {       push_scope(scanner);    }
1974         ;
1975
1976 variant_declaration_end:
1977                 RBRAC
1978                 {       pop_scope(scanner);     }
1979         ;
1980
1981 enum_type_specifier:
1982                 LBRAC enumerator_list RBRAC
1983                 {
1984                         $$ = make_node(scanner, NODE_ENUM);
1985                         $$->u._enum.has_body = 1;
1986                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
1987                 }
1988         |       COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
1989                 {
1990                         $$ = make_node(scanner, NODE_ENUM);
1991                         $$->u._enum.has_body = 1;
1992                         ($$)->u._enum.container_type = $2;
1993                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
1994                 }
1995         |       IDENTIFIER LBRAC enumerator_list RBRAC
1996                 {
1997                         $$ = make_node(scanner, NODE_ENUM);
1998                         $$->u._enum.has_body = 1;
1999                         $$->u._enum.enum_id = $1;
2000                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2001                 }
2002         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
2003                 {
2004                         $$ = make_node(scanner, NODE_ENUM);
2005                         $$->u._enum.has_body = 1;
2006                         $$->u._enum.enum_id = $1;
2007                         ($$)->u._enum.container_type = $3;
2008                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2009                 }
2010         |       ID_TYPE LBRAC enumerator_list RBRAC
2011                 {
2012                         $$ = make_node(scanner, NODE_ENUM);
2013                         $$->u._enum.has_body = 1;
2014                         $$->u._enum.enum_id = $1;
2015                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2016                 }
2017         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
2018                 {
2019                         $$ = make_node(scanner, NODE_ENUM);
2020                         $$->u._enum.has_body = 1;
2021                         $$->u._enum.enum_id = $1;
2022                         ($$)->u._enum.container_type = $3;
2023                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2024                 }
2025         |       LBRAC enumerator_list COMMA RBRAC
2026                 {
2027                         $$ = make_node(scanner, NODE_ENUM);
2028                         $$->u._enum.has_body = 1;
2029                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
2030                 }
2031         |       COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2032                 {
2033                         $$ = make_node(scanner, NODE_ENUM);
2034                         $$->u._enum.has_body = 1;
2035                         ($$)->u._enum.container_type = $2;
2036                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
2037                 }
2038         |       IDENTIFIER LBRAC enumerator_list COMMA RBRAC
2039                 {
2040                         $$ = make_node(scanner, NODE_ENUM);
2041                         $$->u._enum.has_body = 1;
2042                         $$->u._enum.enum_id = $1;
2043                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2044                 }
2045         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2046                 {
2047                         $$ = make_node(scanner, NODE_ENUM);
2048                         $$->u._enum.has_body = 1;
2049                         $$->u._enum.enum_id = $1;
2050                         ($$)->u._enum.container_type = $3;
2051                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2052                 }
2053         |       IDENTIFIER
2054                 {
2055                         $$ = make_node(scanner, NODE_ENUM);
2056                         $$->u._enum.has_body = 0;
2057                         $$->u._enum.enum_id = $1;
2058                 }
2059         |       ID_TYPE LBRAC enumerator_list COMMA RBRAC
2060                 {
2061                         $$ = make_node(scanner, NODE_ENUM);
2062                         $$->u._enum.has_body = 1;
2063                         $$->u._enum.enum_id = $1;
2064                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2065                 }
2066         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2067                 {
2068                         $$ = make_node(scanner, NODE_ENUM);
2069                         $$->u._enum.has_body = 1;
2070                         $$->u._enum.enum_id = $1;
2071                         ($$)->u._enum.container_type = $3;
2072                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2073                 }
2074         |       ID_TYPE
2075                 {
2076                         $$ = make_node(scanner, NODE_ENUM);
2077                         $$->u._enum.has_body = 0;
2078                         $$->u._enum.enum_id = $1;
2079                 }
2080         ;
2081
2082 struct_or_variant_declaration_list:
2083                 /* empty */
2084                 {       $$ = NULL;      }
2085         |       struct_or_variant_declaration_list struct_or_variant_declaration
2086                 {
2087                         if ($1) {
2088                                 $$ = $1;
2089                                 bt_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2090                         } else {
2091                                 $$ = $2;
2092                                 bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
2093                         }
2094                 }
2095         ;
2096
2097 struct_or_variant_declaration:
2098                 declaration_specifiers struct_or_variant_declarator_list SEMICOLON
2099                 {
2100                         struct ctf_node *list;
2101
2102                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2103                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2104                         $$ = make_node(scanner, NODE_STRUCT_OR_VARIANT_DECLARATION);
2105                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2106                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u.struct_or_variant_declaration.type_declarators);
2107                 }
2108         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
2109                 {
2110                         struct ctf_node *list;
2111
2112                         $$ = make_node(scanner, NODE_TYPEDEF);
2113                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2114                         $$->u._typedef.type_specifier_list = list;
2115                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2116                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2117                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2118                 }
2119         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
2120                 {
2121                         struct ctf_node *list;
2122
2123                         $$ = make_node(scanner, NODE_TYPEDEF);
2124                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2125                         $$->u._typedef.type_specifier_list = list;
2126                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2127                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2128                 }
2129         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
2130                 {
2131                         struct ctf_node *list;
2132
2133                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2134                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2135                         $$ = make_node(scanner, NODE_TYPEDEF);
2136                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2137                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2138                 }
2139         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
2140                 {
2141                         struct ctf_node *list;
2142
2143                         $$ = make_node(scanner, NODE_TYPEALIAS);
2144                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2145                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2146
2147                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2148                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2149                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2150                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2151
2152                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2153                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2154                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2155                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2156                 }
2157         ;
2158
2159 alias_declaration_specifiers:
2160                 CONST
2161                 {
2162                         struct ctf_node *node;
2163
2164                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2165                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2166                         node->u.type_specifier.type = TYPESPEC_CONST;
2167                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2168                 }
2169         |       type_specifier
2170                 {
2171                         struct ctf_node *node;
2172
2173                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2174                         node = $1;
2175                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2176                 }
2177         |       IDENTIFIER
2178                 {
2179                         struct ctf_node *node;
2180
2181                         add_type(scanner, $1);
2182                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2183                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2184                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
2185                         node->u.type_specifier.id_type = yylval.s;
2186                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2187                 }
2188         |       alias_declaration_specifiers CONST
2189                 {
2190                         struct ctf_node *node;
2191
2192                         $$ = $1;
2193                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2194                         node->u.type_specifier.type = TYPESPEC_CONST;
2195                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2196                 }
2197         |       alias_declaration_specifiers type_specifier
2198                 {
2199                         $$ = $1;
2200                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
2201                 }
2202         |       alias_declaration_specifiers IDENTIFIER
2203                 {
2204                         struct ctf_node *node;
2205
2206                         add_type(scanner, $2);
2207                         $$ = $1;
2208                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2209                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
2210                         node->u.type_specifier.id_type = yylval.s;
2211                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2212                 }
2213         ;
2214
2215 struct_or_variant_declarator_list:
2216                 struct_or_variant_declarator
2217                 {       $$ = $1;        }
2218         |       struct_or_variant_declarator_list COMMA struct_or_variant_declarator
2219                 {
2220                         $$ = $1;
2221                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2222                 }
2223         ;
2224
2225 struct_or_variant_declarator:
2226                 declarator
2227                 {       $$ = $1;        }
2228         |       COLON unary_expression
2229                 {       $$ = $2;        }
2230         |       declarator COLON unary_expression
2231                 {
2232                         $$ = $1;
2233                         if (set_parent_node($3, $1))
2234                                 reparent_error(scanner, "struct_or_variant_declarator");
2235                 }
2236         ;
2237
2238 enumerator_list:
2239                 enumerator
2240                 {       $$ = $1;        }
2241         |       enumerator_list COMMA enumerator
2242                 {
2243                         $$ = $1;
2244                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2245                 }
2246         ;
2247
2248 enumerator:
2249                 IDENTIFIER
2250                 {
2251                         $$ = make_node(scanner, NODE_ENUMERATOR);
2252                         $$->u.enumerator.id = $1;
2253                 }
2254         |       ID_TYPE
2255                 {
2256                         $$ = make_node(scanner, NODE_ENUMERATOR);
2257                         $$->u.enumerator.id = $1;
2258                 }
2259         |       keywords
2260                 {
2261                         $$ = make_node(scanner, NODE_ENUMERATOR);
2262                         $$->u.enumerator.id = $1;
2263                 }
2264         |       STRING_LITERAL
2265                 {
2266                         $$ = make_node(scanner, NODE_ENUMERATOR);
2267                         $$->u.enumerator.id = $1;
2268                 }
2269         |       IDENTIFIER EQUAL unary_expression_or_range
2270                 {
2271                         $$ = make_node(scanner, NODE_ENUMERATOR);
2272                         $$->u.enumerator.id = $1;
2273                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2274                 }
2275         |       ID_TYPE EQUAL unary_expression_or_range
2276                 {
2277                         $$ = make_node(scanner, NODE_ENUMERATOR);
2278                         $$->u.enumerator.id = $1;
2279                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2280                 }
2281         |       keywords EQUAL unary_expression_or_range
2282                 {
2283                         $$ = make_node(scanner, NODE_ENUMERATOR);
2284                         $$->u.enumerator.id = $1;
2285                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2286                 }
2287         |       STRING_LITERAL EQUAL unary_expression_or_range
2288                 {
2289                         $$ = make_node(scanner, NODE_ENUMERATOR);
2290                         $$->u.enumerator.id = $1;
2291                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2292                 }
2293         ;
2294
2295 abstract_declarator_list:
2296                 abstract_declarator
2297                 {       $$ = $1;        }
2298         |       abstract_declarator_list COMMA abstract_declarator
2299                 {
2300                         $$ = $1;
2301                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2302                 }
2303         ;
2304
2305 abstract_declarator:
2306                 direct_abstract_declarator
2307                 {       $$ = $1;        }
2308         |       pointer direct_abstract_declarator
2309                 {
2310                         $$ = $2;
2311                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2312                 }
2313         ;
2314
2315 direct_abstract_declarator:
2316                 /* empty */
2317                 {
2318                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2319                         $$->u.type_declarator.type = TYPEDEC_ID;
2320                         /* id is NULL */
2321                 }
2322         |       IDENTIFIER
2323                 {
2324                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2325                         $$->u.type_declarator.type = TYPEDEC_ID;
2326                         $$->u.type_declarator.u.id = $1;
2327                 }
2328         |       LPAREN abstract_declarator RPAREN
2329                 {
2330                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2331                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2332                         $$->u.type_declarator.u.nested.type_declarator = $2;
2333                 }
2334         |       direct_abstract_declarator LSBRAC unary_expression RSBRAC
2335                 {
2336                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2337                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2338                         $$->u.type_declarator.u.nested.type_declarator = $1;
2339                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2340                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2341                 }
2342         |       direct_abstract_declarator LSBRAC RSBRAC
2343                 {
2344                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2345                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2346                         $$->u.type_declarator.u.nested.type_declarator = $1;
2347                         $$->u.type_declarator.u.nested.abstract_array = 1;
2348                 }
2349         ;
2350
2351 alias_abstract_declarator_list:
2352                 alias_abstract_declarator
2353                 {       $$ = $1;        }
2354         |       alias_abstract_declarator_list COMMA alias_abstract_declarator
2355                 {
2356                         $$ = $1;
2357                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2358                 }
2359         ;
2360
2361 alias_abstract_declarator:
2362                 direct_alias_abstract_declarator
2363                 {       $$ = $1;        }
2364         |       pointer direct_alias_abstract_declarator
2365                 {
2366                         $$ = $2;
2367                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2368                 }
2369         ;
2370
2371 direct_alias_abstract_declarator:
2372                 /* empty */
2373                 {
2374                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2375                         $$->u.type_declarator.type = TYPEDEC_ID;
2376                         /* id is NULL */
2377                 }
2378         |       LPAREN alias_abstract_declarator RPAREN
2379                 {
2380                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2381                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2382                         $$->u.type_declarator.u.nested.type_declarator = $2;
2383                 }
2384         |       direct_alias_abstract_declarator LSBRAC unary_expression RSBRAC
2385                 {
2386                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2387                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2388                         $$->u.type_declarator.u.nested.type_declarator = $1;
2389                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2390                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2391                 }
2392         |       direct_alias_abstract_declarator LSBRAC RSBRAC
2393                 {
2394                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2395                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2396                         $$->u.type_declarator.u.nested.type_declarator = $1;
2397                         $$->u.type_declarator.u.nested.abstract_array = 1;
2398                 }
2399         ;
2400
2401 declarator:
2402                 direct_declarator
2403                 {       $$ = $1;        }
2404         |       pointer direct_declarator
2405                 {
2406                         $$ = $2;
2407                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2408                 }
2409         ;
2410
2411 direct_declarator:
2412                 IDENTIFIER
2413                 {
2414                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2415                         $$->u.type_declarator.type = TYPEDEC_ID;
2416                         $$->u.type_declarator.u.id = $1;
2417                 }
2418         |       LPAREN declarator RPAREN
2419                 {
2420                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2421                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2422                         $$->u.type_declarator.u.nested.type_declarator = $2;
2423                 }
2424         |       direct_declarator LSBRAC unary_expression RSBRAC
2425                 {
2426                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2427                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2428                         $$->u.type_declarator.u.nested.type_declarator = $1;
2429                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2430                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2431                 }
2432         ;
2433
2434 type_declarator:
2435                 direct_type_declarator
2436                 {       $$ = $1;        }
2437         |       pointer direct_type_declarator
2438                 {
2439                         $$ = $2;
2440                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2441                 }
2442         ;
2443
2444 direct_type_declarator:
2445                 IDENTIFIER
2446                 {
2447                         add_type(scanner, $1);
2448                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2449                         $$->u.type_declarator.type = TYPEDEC_ID;
2450                         $$->u.type_declarator.u.id = $1;
2451                 }
2452         |       LPAREN type_declarator RPAREN
2453                 {
2454                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2455                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2456                         $$->u.type_declarator.u.nested.type_declarator = $2;
2457                 }
2458         |       direct_type_declarator LSBRAC unary_expression RSBRAC
2459                 {
2460                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2461                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2462                         $$->u.type_declarator.u.nested.type_declarator = $1;
2463                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2464                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2465                 }
2466         ;
2467
2468 pointer:
2469                 STAR
2470                 {
2471                         $$ = make_node(scanner, NODE_POINTER);
2472                 }
2473         |       STAR pointer
2474                 {
2475                         $$ = make_node(scanner, NODE_POINTER);
2476                         bt_list_splice(&($2)->tmp_head, &($$)->tmp_head);
2477                 }
2478         |       STAR type_qualifier_list pointer
2479                 {
2480                         $$ = make_node(scanner, NODE_POINTER);
2481                         $$->u.pointer.const_qualifier = 1;
2482                         bt_list_splice(&($3)->tmp_head, &($$)->tmp_head);
2483                 }
2484         ;
2485
2486 type_qualifier_list:
2487                 /* pointer assumes only const type qualifier */
2488                 CONST
2489         |       type_qualifier_list CONST
2490         ;
2491
2492 /* 2.3: CTF-specific declarations */
2493
2494 ctf_assignment_expression_list:
2495                 ctf_assignment_expression SEMICOLON
2496                 {       $$ = $1;        }
2497         |       ctf_assignment_expression_list ctf_assignment_expression SEMICOLON
2498                 {
2499                         $$ = $1;
2500                         bt_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2501                 }
2502         ;
2503
2504 ctf_assignment_expression:
2505                 unary_expression EQUAL unary_expression
2506                 {
2507                         /*
2508                          * Because we have left and right, cannot use
2509                          * set_parent_node.
2510                          */
2511                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2512                         _bt_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2513                         if ($1->u.unary_expression.type != UNARY_STRING)
2514                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2515                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.ctf_expression.right);
2516                 }
2517         |       unary_expression TYPEASSIGN declaration_specifiers      /* Only allow struct */
2518                 {
2519                         /*
2520                          * Because we have left and right, cannot use
2521                          * set_parent_node.
2522                          */
2523                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2524                         _bt_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2525                         if ($1->u.unary_expression.type != UNARY_STRING)
2526                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2527                         bt_list_add_tail(&($3)->siblings, &($$)->u.ctf_expression.right);
2528                 }
2529         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list
2530                 {
2531                         struct ctf_node *list;
2532
2533                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2534                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2535                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2536                         $$ = make_node(scanner, NODE_TYPEDEF);
2537                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2538                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2539                 }
2540         |       TYPEDEF declaration_specifiers type_declarator_list
2541                 {
2542                         struct ctf_node *list;
2543
2544                         $$ = make_node(scanner, NODE_TYPEDEF);
2545                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2546                         $$->u._typedef.type_specifier_list = list;
2547                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2548                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2549                 }
2550         |       declaration_specifiers TYPEDEF type_declarator_list
2551                 {
2552                         struct ctf_node *list;
2553
2554                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2555                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2556                         $$ = make_node(scanner, NODE_TYPEDEF);
2557                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2558                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2559                 }
2560         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list
2561                 {
2562                         struct ctf_node *list;
2563
2564                         $$ = make_node(scanner, NODE_TYPEALIAS);
2565                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2566                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2567
2568                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2569                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2570                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2571                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2572
2573                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2574                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2575                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2576                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2577                 }
2578         ;