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);
  62 BT_HIDDEN
  63 int yylex(union YYSTYPE *yyval, struct ctf_scanner *scanner);
  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 scanner);
  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_ast *ast = ctf_scanner_get_ast(scanner);
 366         struct ctf_node *node;
 367
 368         node = malloc(sizeof(*node));
 369         if (!node) {
 370                 printfl_fatal(yyget_lineno(scanner->scanner), "out of memory");
 371                 return &error_node;
 372         }
 373         memset(node, 0, sizeof(*node));
 374         node->type = type;
 375         node->lineno = yyget_lineno(scanner->scanner);
 376         BT_INIT_LIST_HEAD(&node->tmp_head);
 377         bt_list_add(&node->gc, &ast->allocated_nodes);
 378         bt_list_add(&node->siblings, &node->tmp_head);
 379
 380         switch (type) {
 381         case NODE_ROOT:
 382                 node->type = NODE_ERROR;
 383                 printfn_fatal(node, "trying to create root node");
 384                 break;
 385
 386         case NODE_EVENT:
 387                 BT_INIT_LIST_HEAD(&node->u.event.declaration_list);
 388                 break;
 389         case NODE_STREAM:
 390                 BT_INIT_LIST_HEAD(&node->u.stream.declaration_list);
 391                 break;
 392         case NODE_ENV:
 393                 BT_INIT_LIST_HEAD(&node->u.env.declaration_list);
 394                 break;
 395         case NODE_TRACE:
 396                 BT_INIT_LIST_HEAD(&node->u.trace.declaration_list);
 397                 break;
 398         case NODE_CLOCK:
 399                 BT_INIT_LIST_HEAD(&node->u.clock.declaration_list);
 400                 break;
 401         case NODE_CALLSITE:
 402                 BT_INIT_LIST_HEAD(&node->u.callsite.declaration_list);
 403                 break;
 404
 405         case NODE_CTF_EXPRESSION:
 406                 BT_INIT_LIST_HEAD(&node->u.ctf_expression.left);
 407                 BT_INIT_LIST_HEAD(&node->u.ctf_expression.right);
 408                 break;
 409         case NODE_UNARY_EXPRESSION:
 410                 break;
 411
 412         case NODE_TYPEDEF:
 413                 BT_INIT_LIST_HEAD(&node->u._typedef.type_declarators);
 414                 break;
 415         case NODE_TYPEALIAS_TARGET:
 416                 BT_INIT_LIST_HEAD(&node->u.typealias_target.type_declarators);
 417                 break;
 418         case NODE_TYPEALIAS_ALIAS:
 419                 BT_INIT_LIST_HEAD(&node->u.typealias_alias.type_declarators);
 420                 break;
 421         case NODE_TYPEALIAS:
 422                 break;
 423
 424         case NODE_TYPE_SPECIFIER:
 425                 break;
 426         case NODE_TYPE_SPECIFIER_LIST:
 427                 BT_INIT_LIST_HEAD(&node->u.type_specifier_list.head);
 428                 break;
 429         case NODE_POINTER:
 430                 break;
 431         case NODE_TYPE_DECLARATOR:
 432                 BT_INIT_LIST_HEAD(&node->u.type_declarator.pointers);
 433                 break;
 434
 435         case NODE_FLOATING_POINT:
 436                 BT_INIT_LIST_HEAD(&node->u.floating_point.expressions);
 437                 break;
 438         case NODE_INTEGER:
 439                 BT_INIT_LIST_HEAD(&node->u.integer.expressions);
 440                 break;
 441         case NODE_STRING:
 442                 BT_INIT_LIST_HEAD(&node->u.string.expressions);
 443                 break;
 444         case NODE_ENUMERATOR:
 445                 BT_INIT_LIST_HEAD(&node->u.enumerator.values);
 446                 break;
 447         case NODE_ENUM:
 448                 BT_INIT_LIST_HEAD(&node->u._enum.enumerator_list);
 449                 break;
 450         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 451                 BT_INIT_LIST_HEAD(&node->u.struct_or_variant_declaration.type_declarators);
 452                 break;
 453         case NODE_VARIANT:
 454                 BT_INIT_LIST_HEAD(&node->u.variant.declaration_list);
 455                 break;
 456         case NODE_STRUCT:
 457                 BT_INIT_LIST_HEAD(&node->u._struct.declaration_list);
 458                 BT_INIT_LIST_HEAD(&node->u._struct.min_align);
 459                 break;
 460
 461         case NODE_UNKNOWN:
 462         default:
 463                 node->type = NODE_ERROR;
 464                 printfn_fatal(node, "unknown node type '%d'", (int) type);
 465                 break;
 466         }
 467
 468         return node;
 469 }
 470
 471 static int reparent_ctf_expression(struct ctf_node *node,
 472                                    struct ctf_node *parent)
 473 {
 474         switch (parent->type) {
 475         case NODE_EVENT:
 476                 _bt_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 477                 break;
 478         case NODE_STREAM:
 479                 _bt_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 480                 break;
 481         case NODE_ENV:
 482                 _bt_list_splice_tail(&node->tmp_head, &parent->u.env.declaration_list);
 483                 break;
 484         case NODE_TRACE:
 485                 _bt_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 486                 break;
 487         case NODE_CLOCK:
 488                 _bt_list_splice_tail(&node->tmp_head, &parent->u.clock.declaration_list);
 489                 break;
 490         case NODE_CALLSITE:
 491                 _bt_list_splice_tail(&node->tmp_head, &parent->u.callsite.declaration_list);
 492                 break;
 493         case NODE_FLOATING_POINT:
 494                 _bt_list_splice_tail(&node->tmp_head, &parent->u.floating_point.expressions);
 495                 break;
 496         case NODE_INTEGER:
 497                 _bt_list_splice_tail(&node->tmp_head, &parent->u.integer.expressions);
 498                 break;
 499         case NODE_STRING:
 500                 _bt_list_splice_tail(&node->tmp_head, &parent->u.string.expressions);
 501                 break;
 502
 503         case NODE_ROOT:
 504         case NODE_CTF_EXPRESSION:
 505         case NODE_TYPEDEF:
 506         case NODE_TYPEALIAS_TARGET:
 507         case NODE_TYPEALIAS_ALIAS:
 508         case NODE_TYPEALIAS:
 509         case NODE_TYPE_SPECIFIER:
 510         case NODE_TYPE_SPECIFIER_LIST:
 511         case NODE_POINTER:
 512         case NODE_TYPE_DECLARATOR:
 513         case NODE_ENUMERATOR:
 514         case NODE_ENUM:
 515         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 516         case NODE_VARIANT:
 517         case NODE_STRUCT:
 518         case NODE_UNARY_EXPRESSION:
 519                 return -EPERM;
 520
 521         case NODE_UNKNOWN:
 522         default:
 523                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 524                 return -EINVAL;
 525         }
 526         return 0;
 527 }
 528
 529 static int reparent_typedef(struct ctf_node *node, struct ctf_node *parent)
 530 {
 531         switch (parent->type) {
 532         case NODE_ROOT:
 533                 _bt_list_splice_tail(&node->tmp_head, &parent->u.root.declaration_list);
 534                 break;
 535         case NODE_EVENT:
 536                 _bt_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 537                 break;
 538         case NODE_STREAM:
 539                 _bt_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 540                 break;
 541         case NODE_ENV:
 542                 _bt_list_splice_tail(&node->tmp_head, &parent->u.env.declaration_list);
 543                 break;
 544         case NODE_TRACE:
 545                 _bt_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 546                 break;
 547         case NODE_CLOCK:
 548                 _bt_list_splice_tail(&node->tmp_head, &parent->u.clock.declaration_list);
 549                 break;
 550         case NODE_CALLSITE:
 551                 _bt_list_splice_tail(&node->tmp_head, &parent->u.callsite.declaration_list);
 552                 break;
 553         case NODE_VARIANT:
 554                 _bt_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 555                 break;
 556         case NODE_STRUCT:
 557                 _bt_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 558                 break;
 559
 560         case NODE_FLOATING_POINT:
 561         case NODE_INTEGER:
 562         case NODE_STRING:
 563         case NODE_CTF_EXPRESSION:
 564         case NODE_TYPEDEF:
 565         case NODE_TYPEALIAS_TARGET:
 566         case NODE_TYPEALIAS_ALIAS:
 567         case NODE_TYPEALIAS:
 568         case NODE_TYPE_SPECIFIER:
 569         case NODE_TYPE_SPECIFIER_LIST:
 570         case NODE_POINTER:
 571         case NODE_TYPE_DECLARATOR:
 572         case NODE_ENUMERATOR:
 573         case NODE_ENUM:
 574         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 575         case NODE_UNARY_EXPRESSION:
 576                 return -EPERM;
 577
 578         case NODE_UNKNOWN:
 579         default:
 580                 printfn_fatal(node, "unknown node type %d", parent->type);
 581                 return -EINVAL;
 582         }
 583         return 0;
 584 }
 585
 586 static int reparent_typealias(struct ctf_node *node, struct ctf_node *parent)
 587 {
 588         switch (parent->type) {
 589         case NODE_ROOT:
 590                 _bt_list_splice_tail(&node->tmp_head, &parent->u.root.declaration_list);
 591                 break;
 592         case NODE_EVENT:
 593                 _bt_list_splice_tail(&node->tmp_head, &parent->u.event.declaration_list);
 594                 break;
 595         case NODE_STREAM:
 596                 _bt_list_splice_tail(&node->tmp_head, &parent->u.stream.declaration_list);
 597                 break;
 598         case NODE_ENV:
 599                 _bt_list_splice_tail(&node->tmp_head, &parent->u.env.declaration_list);
 600                 break;
 601         case NODE_TRACE:
 602                 _bt_list_splice_tail(&node->tmp_head, &parent->u.trace.declaration_list);
 603                 break;
 604         case NODE_CLOCK:
 605                 _bt_list_splice_tail(&node->tmp_head, &parent->u.clock.declaration_list);
 606                 break;
 607         case NODE_CALLSITE:
 608                 _bt_list_splice_tail(&node->tmp_head, &parent->u.callsite.declaration_list);
 609                 break;
 610         case NODE_VARIANT:
 611                 _bt_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 612                 break;
 613         case NODE_STRUCT:
 614                 _bt_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 615                 break;
 616
 617         case NODE_FLOATING_POINT:
 618         case NODE_INTEGER:
 619         case NODE_STRING:
 620         case NODE_CTF_EXPRESSION:
 621         case NODE_TYPEDEF:
 622         case NODE_TYPEALIAS_TARGET:
 623         case NODE_TYPEALIAS_ALIAS:
 624         case NODE_TYPEALIAS:
 625         case NODE_TYPE_SPECIFIER:
 626         case NODE_TYPE_SPECIFIER_LIST:
 627         case NODE_POINTER:
 628         case NODE_TYPE_DECLARATOR:
 629         case NODE_ENUMERATOR:
 630         case NODE_ENUM:
 631         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 632         case NODE_UNARY_EXPRESSION:
 633                 return -EPERM;
 634
 635         case NODE_UNKNOWN:
 636         default:
 637                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 638                 return -EINVAL;
 639         }
 640         return 0;
 641 }
 642
 643 static int reparent_type_specifier(struct ctf_node *node,
 644                                    struct ctf_node *parent)
 645 {
 646         switch (parent->type) {
 647         case NODE_TYPE_SPECIFIER_LIST:
 648                 _bt_list_splice_tail(&node->tmp_head, &parent->u.type_specifier_list.head);
 649                 break;
 650
 651         case NODE_TYPE_SPECIFIER:
 652         case NODE_EVENT:
 653         case NODE_STREAM:
 654         case NODE_ENV:
 655         case NODE_TRACE:
 656         case NODE_CLOCK:
 657         case NODE_CALLSITE:
 658         case NODE_VARIANT:
 659         case NODE_STRUCT:
 660         case NODE_TYPEDEF:
 661         case NODE_TYPEALIAS_TARGET:
 662         case NODE_TYPEALIAS_ALIAS:
 663         case NODE_TYPE_DECLARATOR:
 664         case NODE_ENUM:
 665         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 666         case NODE_TYPEALIAS:
 667         case NODE_FLOATING_POINT:
 668         case NODE_INTEGER:
 669         case NODE_STRING:
 670         case NODE_CTF_EXPRESSION:
 671         case NODE_POINTER:
 672         case NODE_ENUMERATOR:
 673         case NODE_UNARY_EXPRESSION:
 674                 return -EPERM;
 675
 676         case NODE_UNKNOWN:
 677         default:
 678                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 679                 return -EINVAL;
 680         }
 681         return 0;
 682 }
 683
 684 static int reparent_type_specifier_list(struct ctf_node *node,
 685                                         struct ctf_node *parent)
 686 {
 687         switch (parent->type) {
 688         case NODE_ROOT:
 689                 bt_list_add_tail(&node->siblings, &parent->u.root.declaration_list);
 690                 break;
 691         case NODE_EVENT:
 692                 bt_list_add_tail(&node->siblings, &parent->u.event.declaration_list);
 693                 break;
 694         case NODE_STREAM:
 695                 bt_list_add_tail(&node->siblings, &parent->u.stream.declaration_list);
 696                 break;
 697         case NODE_ENV:
 698                 bt_list_add_tail(&node->siblings, &parent->u.env.declaration_list);
 699                 break;
 700         case NODE_TRACE:
 701                 bt_list_add_tail(&node->siblings, &parent->u.trace.declaration_list);
 702                 break;
 703         case NODE_CLOCK:
 704                 bt_list_add_tail(&node->siblings, &parent->u.clock.declaration_list);
 705                 break;
 706         case NODE_CALLSITE:
 707                 bt_list_add_tail(&node->siblings, &parent->u.callsite.declaration_list);
 708                 break;
 709         case NODE_VARIANT:
 710                 bt_list_add_tail(&node->siblings, &parent->u.variant.declaration_list);
 711                 break;
 712         case NODE_STRUCT:
 713                 bt_list_add_tail(&node->siblings, &parent->u._struct.declaration_list);
 714                 break;
 715         case NODE_TYPEDEF:
 716                 parent->u._typedef.type_specifier_list = node;
 717                 break;
 718         case NODE_TYPEALIAS_TARGET:
 719                 parent->u.typealias_target.type_specifier_list = node;
 720                 break;
 721         case NODE_TYPEALIAS_ALIAS:
 722                 parent->u.typealias_alias.type_specifier_list = node;
 723                 break;
 724         case NODE_ENUM:
 725                 parent->u._enum.container_type = node;
 726                 break;
 727         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 728                 parent->u.struct_or_variant_declaration.type_specifier_list = node;
 729                 break;
 730         case NODE_TYPE_DECLARATOR:
 731         case NODE_TYPE_SPECIFIER:
 732         case NODE_TYPEALIAS:
 733         case NODE_FLOATING_POINT:
 734         case NODE_INTEGER:
 735         case NODE_STRING:
 736         case NODE_CTF_EXPRESSION:
 737         case NODE_POINTER:
 738         case NODE_ENUMERATOR:
 739         case NODE_UNARY_EXPRESSION:
 740                 return -EPERM;
 741
 742         case NODE_UNKNOWN:
 743         default:
 744                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 745                 return -EINVAL;
 746         }
 747         return 0;
 748 }
 749
 750 static int reparent_type_declarator(struct ctf_node *node,
 751                                     struct ctf_node *parent)
 752 {
 753         switch (parent->type) {
 754         case NODE_TYPE_DECLARATOR:
 755                 parent->u.type_declarator.type = TYPEDEC_NESTED;
 756                 parent->u.type_declarator.u.nested.type_declarator = node;
 757                 break;
 758         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 759                 _bt_list_splice_tail(&node->tmp_head, &parent->u.struct_or_variant_declaration.type_declarators);
 760                 break;
 761         case NODE_TYPEDEF:
 762                 _bt_list_splice_tail(&node->tmp_head, &parent->u._typedef.type_declarators);
 763                 break;
 764         case NODE_TYPEALIAS_TARGET:
 765                 _bt_list_splice_tail(&node->tmp_head, &parent->u.typealias_target.type_declarators);
 766                 break;
 767         case NODE_TYPEALIAS_ALIAS:
 768                 _bt_list_splice_tail(&node->tmp_head, &parent->u.typealias_alias.type_declarators);
 769                 break;
 770
 771         case NODE_ROOT:
 772         case NODE_EVENT:
 773         case NODE_STREAM:
 774         case NODE_ENV:
 775         case NODE_TRACE:
 776         case NODE_CLOCK:
 777         case NODE_CALLSITE:
 778         case NODE_VARIANT:
 779         case NODE_STRUCT:
 780         case NODE_TYPEALIAS:
 781         case NODE_ENUM:
 782         case NODE_FLOATING_POINT:
 783         case NODE_INTEGER:
 784         case NODE_STRING:
 785         case NODE_CTF_EXPRESSION:
 786         case NODE_TYPE_SPECIFIER:
 787         case NODE_TYPE_SPECIFIER_LIST:
 788         case NODE_POINTER:
 789         case NODE_ENUMERATOR:
 790         case NODE_UNARY_EXPRESSION:
 791                 return -EPERM;
 792
 793         case NODE_UNKNOWN:
 794         default:
 795                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 796                 return -EINVAL;
 797         }
 798         return 0;
 799 }
 800
 801 /*
 802  * set_parent_node
 803  *
 804  * Link node to parent. Returns 0 on success, -EPERM if it is not permitted to
 805  * create the link declared by the input, -ENOENT if node or parent is NULL,
 806  * -EINVAL if there is an internal structure problem.
 807  */
 808 static int set_parent_node(struct ctf_node *node,
 809                          struct ctf_node *parent)
 810 {
 811         if (!node || !parent)
 812                 return -ENOENT;
 813
 814         /* Note: Linking to parent will be done only by an external visitor */
 815
 816         switch (node->type) {
 817         case NODE_ROOT:
 818                 printfn_fatal(node, "trying to reparent root node");
 819                 return -EINVAL;
 820
 821         case NODE_EVENT:
 822                 if (parent->type == NODE_ROOT) {
 823                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.event);
 824                 } else {
 825                         return -EPERM;
 826                 }
 827                 break;
 828         case NODE_STREAM:
 829                 if (parent->type == NODE_ROOT) {
 830                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.stream);
 831                 } else {
 832                         return -EPERM;
 833                 }
 834                 break;
 835         case NODE_ENV:
 836                 if (parent->type == NODE_ROOT) {
 837                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.env);
 838                 } else {
 839                         return -EPERM;
 840                 }
 841                 break;
 842         case NODE_TRACE:
 843                 if (parent->type == NODE_ROOT) {
 844                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.trace);
 845                 } else {
 846                         return -EPERM;
 847                 }
 848                 break;
 849         case NODE_CLOCK:
 850                 if (parent->type == NODE_ROOT) {
 851                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.clock);
 852                 } else {
 853                         return -EPERM;
 854                 }
 855                 break;
 856         case NODE_CALLSITE:
 857                 if (parent->type == NODE_ROOT) {
 858                         _bt_list_splice_tail(&node->tmp_head, &parent->u.root.callsite);
 859                 } else {
 860                         return -EPERM;
 861                 }
 862                 break;
 863
 864         case NODE_CTF_EXPRESSION:
 865                 return reparent_ctf_expression(node, parent);
 866         case NODE_UNARY_EXPRESSION:
 867                 if (parent->type == NODE_TYPE_DECLARATOR)
 868                         parent->u.type_declarator.bitfield_len = node;
 869                 else
 870                         return -EPERM;
 871                 break;
 872
 873         case NODE_TYPEDEF:
 874                 return reparent_typedef(node, parent);
 875         case NODE_TYPEALIAS_TARGET:
 876                 if (parent->type == NODE_TYPEALIAS)
 877                         parent->u.typealias.target = node;
 878                 else
 879                         return -EINVAL;
 880         case NODE_TYPEALIAS_ALIAS:
 881                 if (parent->type == NODE_TYPEALIAS)
 882                         parent->u.typealias.alias = node;
 883                 else
 884                         return -EINVAL;
 885         case NODE_TYPEALIAS:
 886                 return reparent_typealias(node, parent);
 887
 888         case NODE_POINTER:
 889                 if (parent->type == NODE_TYPE_DECLARATOR) {
 890                         _bt_list_splice_tail(&node->tmp_head, &parent->u.type_declarator.pointers);
 891                 } else
 892                         return -EPERM;
 893                 break;
 894         case NODE_TYPE_DECLARATOR:
 895                 return reparent_type_declarator(node, parent);
 896
 897         case NODE_TYPE_SPECIFIER_LIST:
 898                 return reparent_type_specifier_list(node, parent);
 899
 900         case NODE_TYPE_SPECIFIER:
 901                 return reparent_type_specifier(node, parent);
 902
 903         case NODE_FLOATING_POINT:
 904         case NODE_INTEGER:
 905         case NODE_STRING:
 906         case NODE_ENUM:
 907         case NODE_VARIANT:
 908         case NODE_STRUCT:
 909                 return -EINVAL; /* Dealt with internally within grammar */
 910
 911         case NODE_ENUMERATOR:
 912                 if (parent->type == NODE_ENUM) {
 913                         _bt_list_splice_tail(&node->tmp_head, &parent->u._enum.enumerator_list);
 914                 } else {
 915                         return -EPERM;
 916                 }
 917                 break;
 918         case NODE_STRUCT_OR_VARIANT_DECLARATION:
 919                 switch (parent->type) {
 920                 case NODE_STRUCT:
 921                         _bt_list_splice_tail(&node->tmp_head, &parent->u._struct.declaration_list);
 922                         break;
 923                 case NODE_VARIANT:
 924                         _bt_list_splice_tail(&node->tmp_head, &parent->u.variant.declaration_list);
 925                         break;
 926                 default:
 927                         return -EINVAL;
 928                 }
 929                 break;
 930
 931         case NODE_UNKNOWN:
 932         default:
 933                 printfn_fatal(node, "unknown node type '%d'", (int) parent->type);
 934                 return -EINVAL;
 935         }
 936         return 0;
 937 }
 938
 939 BT_HIDDEN
 940 void yyerror(struct ctf_scanner *scanner, const char *str)
 941 {
 942         printfl_error(yyget_lineno(scanner->scanner),
 943                 "token \"%s\": %s\n",
 944                 yyget_text(scanner->scanner), str);
 945 }
 946
 947 BT_HIDDEN
 948 int yywrap(void)
 949 {
 950         return 1;
 951 }
 952
 953 #define reparent_error(scanner, str)                            \
 954 do {                                                            \
 955         yyerror(scanner, YY_("reparent_error: " str));  \
 956         YYERROR;                                                \
 957 } while (0)
 958
 959 static struct ctf_ast *ctf_ast_alloc(void)
 960 {
 961         struct ctf_ast *ast;
 962
 963         ast = malloc(sizeof(*ast));
 964         if (!ast)
 965                 return NULL;
 966         memset(ast, 0, sizeof(*ast));
 967         BT_INIT_LIST_HEAD(&ast->allocated_nodes);
 968         ast->root.type = NODE_ROOT;
 969         BT_INIT_LIST_HEAD(&ast->root.tmp_head);
 970         BT_INIT_LIST_HEAD(&ast->root.u.root.declaration_list);
 971         BT_INIT_LIST_HEAD(&ast->root.u.root.trace);
 972         BT_INIT_LIST_HEAD(&ast->root.u.root.env);
 973         BT_INIT_LIST_HEAD(&ast->root.u.root.stream);
 974         BT_INIT_LIST_HEAD(&ast->root.u.root.event);
 975         BT_INIT_LIST_HEAD(&ast->root.u.root.clock);
 976         BT_INIT_LIST_HEAD(&ast->root.u.root.callsite);
 977         return ast;
 978 }
 979
 980 static void ctf_ast_free(struct ctf_ast *ast)
 981 {
 982         struct ctf_node *node, *tmp;
 983
 984         bt_list_for_each_entry_safe(node, tmp, &ast->allocated_nodes, gc)
 985                 free(node);
 986         free(ast);
 987 }
 988
 989 int ctf_scanner_append_ast(struct ctf_scanner *scanner)
 990 {
 991         return yyparse(scanner);
 992 }
 993
 994 struct ctf_scanner *ctf_scanner_alloc(FILE *input)
 995 {
 996         struct ctf_scanner *scanner;
 997         int ret;
 998
 999         yydebug = babeltrace_debug;
1000
1001         scanner = malloc(sizeof(*scanner));
1002         if (!scanner)
1003                 return NULL;
1004         memset(scanner, 0, sizeof(*scanner));
1005
1006         ret = yylex_init_extra(scanner, &scanner->scanner);
1007         if (ret) {
1008                 printf_fatal("yylex_init error");
1009                 goto cleanup_scanner;
1010         }
1011         /* Start processing new stream */
1012         yyrestart(input, scanner->scanner);
1013
1014         scanner->ast = ctf_ast_alloc();
1015         if (!scanner->ast)
1016                 goto cleanup_lexer;
1017         scanner->objstack = objstack_create();
1018         if (!scanner->objstack)
1019                 goto cleanup_ast;
1020         init_scope(&scanner->root_scope, NULL);
1021         scanner->cs = &scanner->root_scope;
1022
1023         if (yydebug)
1024                 fprintf(stdout, "Scanner input is a%s.\n",
1025                         isatty(fileno(input)) ? "n interactive tty" :
1026                                                 " noninteractive file");
1027
1028         return scanner;
1029
1030 cleanup_ast:
1031         ctf_ast_free(scanner->ast);
1032 cleanup_lexer:
1033         ret = yylex_destroy(scanner->scanner);
1034         if (!ret)
1035                 printf_fatal("yylex_destroy error");
1036 cleanup_scanner:
1037         free(scanner);
1038         return NULL;
1039 }
1040
1041 void ctf_scanner_free(struct ctf_scanner *scanner)
1042 {
1043         int ret;
1044
1045         finalize_scope(&scanner->root_scope);
1046         objstack_destroy(scanner->objstack);
1047         ctf_ast_free(scanner->ast);
1048         ret = yylex_destroy(scanner->scanner);
1049         if (ret)
1050                 printf_error("yylex_destroy error");
1051         free(scanner);
1052 }
1053
1054 %}
1055
1056 %define api.pure
1057         /* %locations */
1058 %error-verbose
1059 %parse-param {struct ctf_scanner *scanner}
1060 %lex-param {struct ctf_scanner *scanner}
1061 /*
1062  * Expect two shift-reduce conflicts. Caused by enum name-opt : type {}
1063  * vs struct { int :value; } (unnamed bit-field). The default is to
1064  * shift, so whenever we encounter an enumeration, we are doing the
1065  * proper thing (shift). It is illegal to declare an enumeration
1066  * "bit-field", so it is OK if this situation ends up in a parsing
1067  * error.
1068  */
1069 %expect 2
1070 %start file
1071 %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
1072 %token <s> IDENTIFIER ID_TYPE
1073 %token ERROR
1074 %union
1075 {
1076         long long ll;
1077         unsigned long long ull;
1078         char c;
1079         char *s;
1080         struct ctf_node *n;
1081 }
1082
1083 %type <s> STRING_LITERAL CHARACTER_LITERAL
1084
1085 %type <s> keywords
1086
1087 %type <ull> INTEGER_LITERAL
1088 %type <n> postfix_expression unary_expression unary_expression_or_range
1089
1090 %type <n> declaration
1091 %type <n> event_declaration
1092 %type <n> stream_declaration
1093 %type <n> env_declaration
1094 %type <n> trace_declaration
1095 %type <n> clock_declaration
1096 %type <n> callsite_declaration
1097 %type <n> integer_declaration_specifiers
1098 %type <n> declaration_specifiers
1099 %type <n> alias_declaration_specifiers
1100
1101 %type <n> type_declarator_list
1102 %type <n> integer_type_specifier
1103 %type <n> type_specifier
1104 %type <n> struct_type_specifier
1105 %type <n> variant_type_specifier
1106 %type <n> enum_type_specifier
1107 %type <n> struct_or_variant_declaration_list
1108 %type <n> struct_or_variant_declaration
1109 %type <n> struct_or_variant_declarator_list
1110 %type <n> struct_or_variant_declarator
1111 %type <n> enumerator_list
1112 %type <n> enumerator
1113 %type <n> abstract_declarator_list
1114 %type <n> abstract_declarator
1115 %type <n> direct_abstract_declarator
1116 %type <n> alias_abstract_declarator_list
1117 %type <n> alias_abstract_declarator
1118 %type <n> direct_alias_abstract_declarator
1119 %type <n> declarator
1120 %type <n> direct_declarator
1121 %type <n> type_declarator
1122 %type <n> direct_type_declarator
1123 %type <n> pointer
1124 %type <n> ctf_assignment_expression_list
1125 %type <n> ctf_assignment_expression
1126
1127 %%
1128
1129 file:
1130                 declaration
1131                 {
1132                         if (set_parent_node($1, &ctf_scanner_get_ast(scanner)->root))
1133                                 reparent_error(scanner, "error reparenting to root");
1134                 }
1135         |       file declaration
1136                 {
1137                         if (set_parent_node($2, &ctf_scanner_get_ast(scanner)->root))
1138                                 reparent_error(scanner, "error reparenting to root");
1139                 }
1140         ;
1141
1142 keywords:
1143                 VOID
1144                 {       $$ = yylval.s;          }
1145         |       CHAR
1146                 {       $$ = yylval.s;          }
1147         |       SHORT
1148                 {       $$ = yylval.s;          }
1149         |       INT
1150                 {       $$ = yylval.s;          }
1151         |       LONG
1152                 {       $$ = yylval.s;          }
1153         |       FLOAT
1154                 {       $$ = yylval.s;          }
1155         |       DOUBLE
1156                 {       $$ = yylval.s;          }
1157         |       SIGNED
1158                 {       $$ = yylval.s;          }
1159         |       UNSIGNED
1160                 {       $$ = yylval.s;          }
1161         |       _BOOL
1162                 {       $$ = yylval.s;          }
1163         |       _COMPLEX
1164                 {       $$ = yylval.s;          }
1165         |       _IMAGINARY
1166                 {       $$ = yylval.s;          }
1167         |       FLOATING_POINT
1168                 {       $$ = yylval.s;          }
1169         |       INTEGER
1170                 {       $$ = yylval.s;          }
1171         |       STRING
1172                 {       $$ = yylval.s;          }
1173         |       ENUM
1174                 {       $$ = yylval.s;          }
1175         |       VARIANT
1176                 {       $$ = yylval.s;          }
1177         |       STRUCT
1178                 {       $$ = yylval.s;          }
1179         |       CONST
1180                 {       $$ = yylval.s;          }
1181         |       TYPEDEF
1182                 {       $$ = yylval.s;          }
1183         |       EVENT
1184                 {       $$ = yylval.s;          }
1185         |       STREAM
1186                 {       $$ = yylval.s;          }
1187         |       ENV
1188                 {       $$ = yylval.s;          }
1189         |       TRACE
1190                 {       $$ = yylval.s;          }
1191         |       CLOCK
1192                 {       $$ = yylval.s;          }
1193         |       CALLSITE
1194                 {       $$ = yylval.s;          }
1195         |       TOK_ALIGN
1196                 {       $$ = yylval.s;          }
1197         ;
1198
1199
1200 /* 2: Phrase structure grammar */
1201
1202 postfix_expression:
1203                 IDENTIFIER
1204                 {
1205                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1206                         $$->u.unary_expression.type = UNARY_STRING;
1207                         $$->u.unary_expression.u.string = yylval.s;
1208                 }
1209         |       ID_TYPE
1210                 {
1211                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1212                         $$->u.unary_expression.type = UNARY_STRING;
1213                         $$->u.unary_expression.u.string = yylval.s;
1214                 }
1215         |       keywords
1216                 {
1217                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1218                         $$->u.unary_expression.type = UNARY_STRING;
1219                         $$->u.unary_expression.u.string = yylval.s;
1220                 }
1221         |       INTEGER_LITERAL
1222                 {
1223                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1224                         $$->u.unary_expression.type = UNARY_UNSIGNED_CONSTANT;
1225                         $$->u.unary_expression.u.unsigned_constant = $1;
1226                 }
1227         |       STRING_LITERAL
1228                 {
1229                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1230                         $$->u.unary_expression.type = UNARY_STRING;
1231                         $$->u.unary_expression.u.string = $1;
1232                 }
1233         |       CHARACTER_LITERAL
1234                 {
1235                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1236                         $$->u.unary_expression.type = UNARY_STRING;
1237                         $$->u.unary_expression.u.string = $1;
1238                 }
1239         |       LPAREN unary_expression RPAREN
1240                 {
1241                         $$ = $2;
1242                 }
1243         |       postfix_expression LSBRAC unary_expression RSBRAC
1244                 {
1245                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1246                         $$->u.unary_expression.type = UNARY_SBRAC;
1247                         $$->u.unary_expression.u.sbrac_exp = $3;
1248                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1249                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1250                 }
1251         |       postfix_expression DOT IDENTIFIER
1252                 {
1253                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1254                         $$->u.unary_expression.type = UNARY_STRING;
1255                         $$->u.unary_expression.u.string = yylval.s;
1256                         $$->u.unary_expression.link = UNARY_DOTLINK;
1257                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1258                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1259                 }
1260         |       postfix_expression DOT ID_TYPE
1261                 {
1262                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1263                         $$->u.unary_expression.type = UNARY_STRING;
1264                         $$->u.unary_expression.u.string = yylval.s;
1265                         $$->u.unary_expression.link = UNARY_DOTLINK;
1266                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1267                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1268                 }
1269         |       postfix_expression RARROW IDENTIFIER
1270                 {
1271                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1272                         $$->u.unary_expression.type = UNARY_STRING;
1273                         $$->u.unary_expression.u.string = yylval.s;
1274                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1275                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1276                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1277                 }
1278         |       postfix_expression RARROW ID_TYPE
1279                 {
1280                         $$ = make_node(scanner, NODE_UNARY_EXPRESSION);
1281                         $$->u.unary_expression.type = UNARY_STRING;
1282                         $$->u.unary_expression.u.string = yylval.s;
1283                         $$->u.unary_expression.link = UNARY_ARROWLINK;
1284                         bt_list_splice(&($1)->tmp_head, &($$)->tmp_head);
1285                         bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
1286                 }
1287         ;
1288
1289 unary_expression:
1290                 postfix_expression
1291                 {       $$ = $1;                                }
1292         |       PLUS postfix_expression
1293                 {
1294                         $$ = $2;
1295                         if ($$->u.unary_expression.type != UNARY_UNSIGNED_CONSTANT
1296                                 && $$->u.unary_expression.type != UNARY_SIGNED_CONSTANT) {
1297                                 reparent_error(scanner, "expecting numeric constant");
1298                         }
1299                 }
1300         |       MINUS postfix_expression
1301                 {
1302                         $$ = $2;
1303                         if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1304                                 $$->u.unary_expression.type = UNARY_SIGNED_CONSTANT;
1305                                 $$->u.unary_expression.u.signed_constant =
1306                                         -($$->u.unary_expression.u.unsigned_constant);
1307                         } else if ($$->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT) {
1308                                 $$->u.unary_expression.u.signed_constant =
1309                                         -($$->u.unary_expression.u.signed_constant);
1310                         } else {
1311                                 reparent_error(scanner, "expecting numeric constant");
1312                         }
1313                 }
1314         ;
1315
1316 unary_expression_or_range:
1317                 unary_expression DOTDOTDOT unary_expression
1318                 {
1319                         $$ = $1;
1320                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->tmp_head);
1321                         $3->u.unary_expression.link = UNARY_DOTDOTDOT;
1322                 }
1323         |       unary_expression
1324                 {       $$ = $1;                }
1325         ;
1326
1327 /* 2.2: Declarations */
1328
1329 declaration:
1330                 declaration_specifiers SEMICOLON
1331                 {       $$ = $1;        }
1332         |       event_declaration
1333                 {       $$ = $1;        }
1334         |       stream_declaration
1335                 {       $$ = $1;        }
1336         |       env_declaration
1337                 {       $$ = $1;        }
1338         |       trace_declaration
1339                 {       $$ = $1;        }
1340         |       clock_declaration
1341                 {       $$ = $1;        }
1342         |       callsite_declaration
1343                 {       $$ = $1;        }
1344         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1345                 {
1346                         struct ctf_node *list;
1347
1348                         $$ = make_node(scanner, NODE_TYPEDEF);
1349                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1350                         $$->u._typedef.type_specifier_list = list;
1351                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1352                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1353                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
1354                 }
1355         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
1356                 {
1357                         struct ctf_node *list;
1358
1359                         $$ = make_node(scanner, NODE_TYPEDEF);
1360                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1361                         $$->u._typedef.type_specifier_list = list;
1362                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1363                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1364                 }
1365         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
1366                 {
1367                         struct ctf_node *list;
1368
1369                         $$ = make_node(scanner, NODE_TYPEDEF);
1370                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1371                         $$->u._typedef.type_specifier_list = list;
1372                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1373                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
1374                 }
1375         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
1376                 {
1377                         struct ctf_node *list;
1378
1379                         $$ = make_node(scanner, NODE_TYPEALIAS);
1380                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
1381                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
1382
1383                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1384                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
1385                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1386                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
1387
1388                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1389                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
1390                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
1391                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
1392                 }
1393         ;
1394
1395 event_declaration:
1396                 event_declaration_begin event_declaration_end
1397                 {
1398                         $$ = make_node(scanner, NODE_EVENT);
1399                 }
1400         |       event_declaration_begin ctf_assignment_expression_list event_declaration_end
1401                 {
1402                         $$ = make_node(scanner, NODE_EVENT);
1403                         if (set_parent_node($2, $$))
1404                                 reparent_error(scanner, "event_declaration");
1405                 }
1406         ;
1407
1408 event_declaration_begin:
1409                 EVENT LBRAC
1410                 {       push_scope(scanner);    }
1411         ;
1412
1413 event_declaration_end:
1414                 RBRAC SEMICOLON
1415                 {       pop_scope(scanner);     }
1416         ;
1417
1418
1419 stream_declaration:
1420                 stream_declaration_begin stream_declaration_end
1421                 {
1422                         $$ = make_node(scanner, NODE_STREAM);
1423                 }
1424         |       stream_declaration_begin ctf_assignment_expression_list stream_declaration_end
1425                 {
1426                         $$ = make_node(scanner, NODE_STREAM);
1427                         if (set_parent_node($2, $$))
1428                                 reparent_error(scanner, "stream_declaration");
1429                 }
1430         ;
1431
1432 stream_declaration_begin:
1433                 STREAM LBRAC
1434                 {       push_scope(scanner);    }
1435         ;
1436
1437 stream_declaration_end:
1438                 RBRAC SEMICOLON
1439                 {       pop_scope(scanner);     }
1440         ;
1441
1442 env_declaration:
1443                 env_declaration_begin env_declaration_end
1444                 {
1445                         $$ = make_node(scanner, NODE_ENV);
1446                 }
1447         |       env_declaration_begin ctf_assignment_expression_list env_declaration_end
1448                 {
1449                         $$ = make_node(scanner, NODE_ENV);
1450                         if (set_parent_node($2, $$))
1451                                 reparent_error(scanner, "env declaration");
1452                 }
1453         ;
1454
1455 env_declaration_begin:
1456                 ENV LBRAC
1457                 {       push_scope(scanner);    }
1458         ;
1459
1460 env_declaration_end:
1461                 RBRAC SEMICOLON
1462                 {       pop_scope(scanner);     }
1463         ;
1464
1465 trace_declaration:
1466                 trace_declaration_begin trace_declaration_end
1467                 {
1468                         $$ = make_node(scanner, NODE_TRACE);
1469                 }
1470         |       trace_declaration_begin ctf_assignment_expression_list trace_declaration_end
1471                 {
1472                         $$ = make_node(scanner, NODE_TRACE);
1473                         if (set_parent_node($2, $$))
1474                                 reparent_error(scanner, "trace_declaration");
1475                 }
1476         ;
1477
1478 trace_declaration_begin:
1479                 TRACE LBRAC
1480                 {       push_scope(scanner);    }
1481         ;
1482
1483 trace_declaration_end:
1484                 RBRAC SEMICOLON
1485                 {       pop_scope(scanner);     }
1486         ;
1487
1488 clock_declaration:
1489                 CLOCK clock_declaration_begin clock_declaration_end
1490                 {
1491                         $$ = make_node(scanner, NODE_CLOCK);
1492                 }
1493         |       CLOCK clock_declaration_begin ctf_assignment_expression_list clock_declaration_end
1494                 {
1495                         $$ = make_node(scanner, NODE_CLOCK);
1496                         if (set_parent_node($3, $$))
1497                                 reparent_error(scanner, "trace_declaration");
1498                 }
1499         ;
1500
1501 clock_declaration_begin:
1502                 LBRAC
1503                 {       push_scope(scanner);    }
1504         ;
1505
1506 clock_declaration_end:
1507                 RBRAC SEMICOLON
1508                 {       pop_scope(scanner);     }
1509         ;
1510
1511 callsite_declaration:
1512                 CALLSITE callsite_declaration_begin callsite_declaration_end
1513                 {
1514                         $$ = make_node(scanner, NODE_CALLSITE);
1515                 }
1516         |       CALLSITE callsite_declaration_begin ctf_assignment_expression_list callsite_declaration_end
1517                 {
1518                         $$ = make_node(scanner, NODE_CALLSITE);
1519                         if (set_parent_node($3, $$))
1520                                 reparent_error(scanner, "trace_declaration");
1521                 }
1522         ;
1523
1524 callsite_declaration_begin:
1525                 LBRAC
1526                 {       push_scope(scanner);    }
1527         ;
1528
1529 callsite_declaration_end:
1530                 RBRAC SEMICOLON
1531                 {       pop_scope(scanner);     }
1532         ;
1533
1534 integer_declaration_specifiers:
1535                 CONST
1536                 {
1537                         struct ctf_node *node;
1538
1539                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1540                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1541                         node->u.type_specifier.type = TYPESPEC_CONST;
1542                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1543                 }
1544         |       integer_type_specifier
1545                 {
1546                         struct ctf_node *node;
1547
1548                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1549                         node = $1;
1550                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1551                 }
1552         |       integer_declaration_specifiers CONST
1553                 {
1554                         struct ctf_node *node;
1555
1556                         $$ = $1;
1557                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1558                         node->u.type_specifier.type = TYPESPEC_CONST;
1559                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1560                 }
1561         |       integer_declaration_specifiers integer_type_specifier
1562                 {
1563                         $$ = $1;
1564                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1565                 }
1566         ;
1567
1568 declaration_specifiers:
1569                 CONST
1570                 {
1571                         struct ctf_node *node;
1572
1573                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1574                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1575                         node->u.type_specifier.type = TYPESPEC_CONST;
1576                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1577                 }
1578         |       type_specifier
1579                 {
1580                         struct ctf_node *node;
1581
1582                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
1583                         node = $1;
1584                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1585                 }
1586         |       declaration_specifiers CONST
1587                 {
1588                         struct ctf_node *node;
1589
1590                         $$ = $1;
1591                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
1592                         node->u.type_specifier.type = TYPESPEC_CONST;
1593                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
1594                 }
1595         |       declaration_specifiers type_specifier
1596                 {
1597                         $$ = $1;
1598                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
1599                 }
1600         ;
1601
1602 type_declarator_list:
1603                 type_declarator
1604                 {       $$ = $1;        }
1605         |       type_declarator_list COMMA type_declarator
1606                 {
1607                         $$ = $1;
1608                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
1609                 }
1610         ;
1611
1612 integer_type_specifier:
1613                 CHAR
1614                 {
1615                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1616                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1617                 }
1618         |       SHORT
1619                 {
1620                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1621                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1622                 }
1623         |       INT
1624                 {
1625                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1626                         $$->u.type_specifier.type = TYPESPEC_INT;
1627                 }
1628         |       LONG
1629                 {
1630                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1631                         $$->u.type_specifier.type = TYPESPEC_LONG;
1632                 }
1633         |       SIGNED
1634                 {
1635                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1636                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1637                 }
1638         |       UNSIGNED
1639                 {
1640                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1641                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1642                 }
1643         |       _BOOL
1644                 {
1645                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1646                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1647                 }
1648         |       ID_TYPE
1649                 {
1650                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1651                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1652                         $$->u.type_specifier.id_type = yylval.s;
1653                 }
1654         |       INTEGER LBRAC RBRAC
1655                 {
1656                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1657                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1658                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1659                 }
1660         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1661                 {
1662                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1663                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1664                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1665                         if (set_parent_node($3, $$->u.type_specifier.node))
1666                                 reparent_error(scanner, "integer reparent error");
1667                 }
1668         ;
1669
1670 type_specifier:
1671                 VOID
1672                 {
1673                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1674                         $$->u.type_specifier.type = TYPESPEC_VOID;
1675                 }
1676         |       CHAR
1677                 {
1678                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1679                         $$->u.type_specifier.type = TYPESPEC_CHAR;
1680                 }
1681         |       SHORT
1682                 {
1683                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1684                         $$->u.type_specifier.type = TYPESPEC_SHORT;
1685                 }
1686         |       INT
1687                 {
1688                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1689                         $$->u.type_specifier.type = TYPESPEC_INT;
1690                 }
1691         |       LONG
1692                 {
1693                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1694                         $$->u.type_specifier.type = TYPESPEC_LONG;
1695                 }
1696         |       FLOAT
1697                 {
1698                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1699                         $$->u.type_specifier.type = TYPESPEC_FLOAT;
1700                 }
1701         |       DOUBLE
1702                 {
1703                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1704                         $$->u.type_specifier.type = TYPESPEC_DOUBLE;
1705                 }
1706         |       SIGNED
1707                 {
1708                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1709                         $$->u.type_specifier.type = TYPESPEC_SIGNED;
1710                 }
1711         |       UNSIGNED
1712                 {
1713                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1714                         $$->u.type_specifier.type = TYPESPEC_UNSIGNED;
1715                 }
1716         |       _BOOL
1717                 {
1718                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1719                         $$->u.type_specifier.type = TYPESPEC_BOOL;
1720                 }
1721         |       _COMPLEX
1722                 {
1723                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1724                         $$->u.type_specifier.type = TYPESPEC_COMPLEX;
1725                 }
1726         |       _IMAGINARY
1727                 {
1728                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1729                         $$->u.type_specifier.type = TYPESPEC_IMAGINARY;
1730                 }
1731         |       ID_TYPE
1732                 {
1733                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1734                         $$->u.type_specifier.type = TYPESPEC_ID_TYPE;
1735                         $$->u.type_specifier.id_type = yylval.s;
1736                 }
1737         |       FLOATING_POINT LBRAC RBRAC
1738                 {
1739                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1740                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1741                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1742                 }
1743         |       FLOATING_POINT LBRAC ctf_assignment_expression_list RBRAC
1744                 {
1745                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1746                         $$->u.type_specifier.type = TYPESPEC_FLOATING_POINT;
1747                         $$->u.type_specifier.node = make_node(scanner, NODE_FLOATING_POINT);
1748                         if (set_parent_node($3, $$->u.type_specifier.node))
1749                                 reparent_error(scanner, "floating point reparent error");
1750                 }
1751         |       INTEGER LBRAC RBRAC
1752                 {
1753                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1754                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1755                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1756                 }
1757         |       INTEGER LBRAC ctf_assignment_expression_list RBRAC
1758                 {
1759                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1760                         $$->u.type_specifier.type = TYPESPEC_INTEGER;
1761                         $$->u.type_specifier.node = make_node(scanner, NODE_INTEGER);
1762                         if (set_parent_node($3, $$->u.type_specifier.node))
1763                                 reparent_error(scanner, "integer reparent error");
1764                 }
1765         |       STRING
1766                 {
1767                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1768                         $$->u.type_specifier.type = TYPESPEC_STRING;
1769                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1770                 }
1771         |       STRING LBRAC RBRAC
1772                 {
1773                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1774                         $$->u.type_specifier.type = TYPESPEC_STRING;
1775                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1776                 }
1777         |       STRING LBRAC ctf_assignment_expression_list RBRAC
1778                 {
1779                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1780                         $$->u.type_specifier.type = TYPESPEC_STRING;
1781                         $$->u.type_specifier.node = make_node(scanner, NODE_STRING);
1782                         if (set_parent_node($3, $$->u.type_specifier.node))
1783                                 reparent_error(scanner, "string reparent error");
1784                 }
1785         |       ENUM enum_type_specifier
1786                 {
1787                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1788                         $$->u.type_specifier.type = TYPESPEC_ENUM;
1789                         $$->u.type_specifier.node = $2;
1790                 }
1791         |       VARIANT variant_type_specifier
1792                 {
1793                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1794                         $$->u.type_specifier.type = TYPESPEC_VARIANT;
1795                         $$->u.type_specifier.node = $2;
1796                 }
1797         |       STRUCT struct_type_specifier
1798                 {
1799                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER);
1800                         $$->u.type_specifier.type = TYPESPEC_STRUCT;
1801                         $$->u.type_specifier.node = $2;
1802                 }
1803         ;
1804
1805 struct_type_specifier:
1806                 struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1807                 {
1808                         $$ = make_node(scanner, NODE_STRUCT);
1809                         $$->u._struct.has_body = 1;
1810                         if ($2 && set_parent_node($2, $$))
1811                                 reparent_error(scanner, "struct reparent error");
1812                 }
1813         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1814                 {
1815                         $$ = make_node(scanner, NODE_STRUCT);
1816                         $$->u._struct.has_body = 1;
1817                         $$->u._struct.name = $1;
1818                         if ($3 && set_parent_node($3, $$))
1819                                 reparent_error(scanner, "struct reparent error");
1820                 }
1821         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end
1822                 {
1823                         $$ = make_node(scanner, NODE_STRUCT);
1824                         $$->u._struct.has_body = 1;
1825                         $$->u._struct.name = $1;
1826                         if ($3 && set_parent_node($3, $$))
1827                                 reparent_error(scanner, "struct reparent error");
1828                 }
1829         |       IDENTIFIER
1830                 {
1831                         $$ = make_node(scanner, NODE_STRUCT);
1832                         $$->u._struct.has_body = 0;
1833                         $$->u._struct.name = $1;
1834                 }
1835         |       ID_TYPE
1836                 {
1837                         $$ = make_node(scanner, NODE_STRUCT);
1838                         $$->u._struct.has_body = 0;
1839                         $$->u._struct.name = $1;
1840                 }
1841         |       struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1842                 {
1843                         $$ = make_node(scanner, NODE_STRUCT);
1844                         $$->u._struct.has_body = 1;
1845                         bt_list_add_tail(&($6)->siblings, &$$->u._struct.min_align);
1846                         if ($2 && set_parent_node($2, $$))
1847                                 reparent_error(scanner, "struct reparent error");
1848                 }
1849         |       IDENTIFIER struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1850                 {
1851                         $$ = make_node(scanner, NODE_STRUCT);
1852                         $$->u._struct.has_body = 1;
1853                         $$->u._struct.name = $1;
1854                         bt_list_add_tail(&($7)->siblings, &$$->u._struct.min_align);
1855                         if ($3 && set_parent_node($3, $$))
1856                                 reparent_error(scanner, "struct reparent error");
1857                 }
1858         |       ID_TYPE struct_declaration_begin struct_or_variant_declaration_list struct_declaration_end TOK_ALIGN LPAREN unary_expression RPAREN
1859                 {
1860                         $$ = make_node(scanner, NODE_STRUCT);
1861                         $$->u._struct.has_body = 1;
1862                         $$->u._struct.name = $1;
1863                         bt_list_add_tail(&($7)->siblings, &$$->u._struct.min_align);
1864                         if ($3 && set_parent_node($3, $$))
1865                                 reparent_error(scanner, "struct reparent error");
1866                 }
1867         ;
1868
1869 struct_declaration_begin:
1870                 LBRAC
1871                 {       push_scope(scanner);    }
1872         ;
1873
1874 struct_declaration_end:
1875                 RBRAC
1876                 {       pop_scope(scanner);     }
1877         ;
1878
1879 variant_type_specifier:
1880                 variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1881                 {
1882                         $$ = make_node(scanner, NODE_VARIANT);
1883                         $$->u.variant.has_body = 1;
1884                         if ($2 && set_parent_node($2, $$))
1885                                 reparent_error(scanner, "variant reparent error");
1886                 }
1887         |       LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1888                 {
1889                         $$ = make_node(scanner, NODE_VARIANT);
1890                         $$->u.variant.has_body = 1;
1891                         $$->u.variant.choice = $2;
1892                         if ($5 && set_parent_node($5, $$))
1893                                 reparent_error(scanner, "variant reparent error");
1894                 }
1895         |       LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1896                 {
1897                         $$ = make_node(scanner, NODE_VARIANT);
1898                         $$->u.variant.has_body = 1;
1899                         $$->u.variant.choice = $2;
1900                         if ($5 && set_parent_node($5, $$))
1901                                 reparent_error(scanner, "variant reparent error");
1902                 }
1903         |       IDENTIFIER variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1904                 {
1905                         $$ = make_node(scanner, NODE_VARIANT);
1906                         $$->u.variant.has_body = 1;
1907                         $$->u.variant.name = $1;
1908                         if ($3 && set_parent_node($3, $$))
1909                                 reparent_error(scanner, "variant reparent error");
1910                 }
1911         |       IDENTIFIER LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1912                 {
1913                         $$ = make_node(scanner, NODE_VARIANT);
1914                         $$->u.variant.has_body = 1;
1915                         $$->u.variant.name = $1;
1916                         $$->u.variant.choice = $3;
1917                         if ($6 && set_parent_node($6, $$))
1918                                 reparent_error(scanner, "variant reparent error");
1919                 }
1920         |       IDENTIFIER LT IDENTIFIER GT
1921                 {
1922                         $$ = make_node(scanner, NODE_VARIANT);
1923                         $$->u.variant.has_body = 0;
1924                         $$->u.variant.name = $1;
1925                         $$->u.variant.choice = $3;
1926                 }
1927         |       IDENTIFIER LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1928                 {
1929                         $$ = make_node(scanner, NODE_VARIANT);
1930                         $$->u.variant.has_body = 1;
1931                         $$->u.variant.name = $1;
1932                         $$->u.variant.choice = $3;
1933                         if ($6 && set_parent_node($6, $$))
1934                                 reparent_error(scanner, "variant reparent error");
1935                 }
1936         |       IDENTIFIER LT ID_TYPE GT
1937                 {
1938                         $$ = make_node(scanner, NODE_VARIANT);
1939                         $$->u.variant.has_body = 0;
1940                         $$->u.variant.name = $1;
1941                         $$->u.variant.choice = $3;
1942                 }
1943         |       ID_TYPE variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1944                 {
1945                         $$ = make_node(scanner, NODE_VARIANT);
1946                         $$->u.variant.has_body = 1;
1947                         $$->u.variant.name = $1;
1948                         if ($3 && set_parent_node($3, $$))
1949                                 reparent_error(scanner, "variant reparent error");
1950                 }
1951         |       ID_TYPE LT IDENTIFIER GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1952                 {
1953                         $$ = make_node(scanner, NODE_VARIANT);
1954                         $$->u.variant.has_body = 1;
1955                         $$->u.variant.name = $1;
1956                         $$->u.variant.choice = $3;
1957                         if ($6 && set_parent_node($6, $$))
1958                                 reparent_error(scanner, "variant reparent error");
1959                 }
1960         |       ID_TYPE LT IDENTIFIER GT
1961                 {
1962                         $$ = make_node(scanner, NODE_VARIANT);
1963                         $$->u.variant.has_body = 0;
1964                         $$->u.variant.name = $1;
1965                         $$->u.variant.choice = $3;
1966                 }
1967         |       ID_TYPE LT ID_TYPE GT variant_declaration_begin struct_or_variant_declaration_list variant_declaration_end
1968                 {
1969                         $$ = make_node(scanner, NODE_VARIANT);
1970                         $$->u.variant.has_body = 1;
1971                         $$->u.variant.name = $1;
1972                         $$->u.variant.choice = $3;
1973                         if ($6 && set_parent_node($6, $$))
1974                                 reparent_error(scanner, "variant reparent error");
1975                 }
1976         |       ID_TYPE LT ID_TYPE GT
1977                 {
1978                         $$ = make_node(scanner, NODE_VARIANT);
1979                         $$->u.variant.has_body = 0;
1980                         $$->u.variant.name = $1;
1981                         $$->u.variant.choice = $3;
1982                 }
1983         ;
1984
1985 variant_declaration_begin:
1986                 LBRAC
1987                 {       push_scope(scanner);    }
1988         ;
1989
1990 variant_declaration_end:
1991                 RBRAC
1992                 {       pop_scope(scanner);     }
1993         ;
1994
1995 enum_type_specifier:
1996                 LBRAC enumerator_list RBRAC
1997                 {
1998                         $$ = make_node(scanner, NODE_ENUM);
1999                         $$->u._enum.has_body = 1;
2000                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
2001                 }
2002         |       COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
2003                 {
2004                         $$ = make_node(scanner, NODE_ENUM);
2005                         $$->u._enum.has_body = 1;
2006                         ($$)->u._enum.container_type = $2;
2007                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
2008                 }
2009         |       IDENTIFIER LBRAC enumerator_list RBRAC
2010                 {
2011                         $$ = make_node(scanner, NODE_ENUM);
2012                         $$->u._enum.has_body = 1;
2013                         $$->u._enum.enum_id = $1;
2014                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2015                 }
2016         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
2017                 {
2018                         $$ = make_node(scanner, NODE_ENUM);
2019                         $$->u._enum.has_body = 1;
2020                         $$->u._enum.enum_id = $1;
2021                         ($$)->u._enum.container_type = $3;
2022                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2023                 }
2024         |       ID_TYPE LBRAC enumerator_list RBRAC
2025                 {
2026                         $$ = make_node(scanner, NODE_ENUM);
2027                         $$->u._enum.has_body = 1;
2028                         $$->u._enum.enum_id = $1;
2029                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2030                 }
2031         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list RBRAC
2032                 {
2033                         $$ = make_node(scanner, NODE_ENUM);
2034                         $$->u._enum.has_body = 1;
2035                         $$->u._enum.enum_id = $1;
2036                         ($$)->u._enum.container_type = $3;
2037                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2038                 }
2039         |       LBRAC enumerator_list COMMA RBRAC
2040                 {
2041                         $$ = make_node(scanner, NODE_ENUM);
2042                         $$->u._enum.has_body = 1;
2043                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u._enum.enumerator_list);
2044                 }
2045         |       COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2046                 {
2047                         $$ = make_node(scanner, NODE_ENUM);
2048                         $$->u._enum.has_body = 1;
2049                         ($$)->u._enum.container_type = $2;
2050                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._enum.enumerator_list);
2051                 }
2052         |       IDENTIFIER LBRAC enumerator_list COMMA RBRAC
2053                 {
2054                         $$ = make_node(scanner, NODE_ENUM);
2055                         $$->u._enum.has_body = 1;
2056                         $$->u._enum.enum_id = $1;
2057                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2058                 }
2059         |       IDENTIFIER COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2060                 {
2061                         $$ = make_node(scanner, NODE_ENUM);
2062                         $$->u._enum.has_body = 1;
2063                         $$->u._enum.enum_id = $1;
2064                         ($$)->u._enum.container_type = $3;
2065                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2066                 }
2067         |       IDENTIFIER
2068                 {
2069                         $$ = make_node(scanner, NODE_ENUM);
2070                         $$->u._enum.has_body = 0;
2071                         $$->u._enum.enum_id = $1;
2072                 }
2073         |       ID_TYPE LBRAC enumerator_list COMMA RBRAC
2074                 {
2075                         $$ = make_node(scanner, NODE_ENUM);
2076                         $$->u._enum.has_body = 1;
2077                         $$->u._enum.enum_id = $1;
2078                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._enum.enumerator_list);
2079                 }
2080         |       ID_TYPE COLON integer_declaration_specifiers LBRAC enumerator_list COMMA RBRAC
2081                 {
2082                         $$ = make_node(scanner, NODE_ENUM);
2083                         $$->u._enum.has_body = 1;
2084                         $$->u._enum.enum_id = $1;
2085                         ($$)->u._enum.container_type = $3;
2086                         _bt_list_splice_tail(&($5)->tmp_head, &($$)->u._enum.enumerator_list);
2087                 }
2088         |       ID_TYPE
2089                 {
2090                         $$ = make_node(scanner, NODE_ENUM);
2091                         $$->u._enum.has_body = 0;
2092                         $$->u._enum.enum_id = $1;
2093                 }
2094         ;
2095
2096 struct_or_variant_declaration_list:
2097                 /* empty */
2098                 {       $$ = NULL;      }
2099         |       struct_or_variant_declaration_list struct_or_variant_declaration
2100                 {
2101                         if ($1) {
2102                                 $$ = $1;
2103                                 bt_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2104                         } else {
2105                                 $$ = $2;
2106                                 bt_list_add_tail(&($$)->siblings, &($$)->tmp_head);
2107                         }
2108                 }
2109         ;
2110
2111 struct_or_variant_declaration:
2112                 declaration_specifiers struct_or_variant_declarator_list SEMICOLON
2113                 {
2114                         struct ctf_node *list;
2115
2116                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2117                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2118                         $$ = make_node(scanner, NODE_STRUCT_OR_VARIANT_DECLARATION);
2119                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2120                         _bt_list_splice_tail(&($2)->tmp_head, &($$)->u.struct_or_variant_declaration.type_declarators);
2121                 }
2122         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
2123                 {
2124                         struct ctf_node *list;
2125
2126                         $$ = make_node(scanner, NODE_TYPEDEF);
2127                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2128                         $$->u._typedef.type_specifier_list = list;
2129                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2130                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2131                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2132                 }
2133         |       TYPEDEF declaration_specifiers type_declarator_list SEMICOLON
2134                 {
2135                         struct ctf_node *list;
2136
2137                         $$ = make_node(scanner, NODE_TYPEDEF);
2138                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2139                         $$->u._typedef.type_specifier_list = list;
2140                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2141                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2142                 }
2143         |       declaration_specifiers TYPEDEF type_declarator_list SEMICOLON
2144                 {
2145                         struct ctf_node *list;
2146
2147                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2148                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2149                         $$ = make_node(scanner, NODE_TYPEDEF);
2150                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2151                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2152                 }
2153         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list SEMICOLON
2154                 {
2155                         struct ctf_node *list;
2156
2157                         $$ = make_node(scanner, NODE_TYPEALIAS);
2158                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2159                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2160
2161                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2162                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2163                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2164                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2165
2166                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2167                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2168                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2169                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2170                 }
2171         ;
2172
2173 alias_declaration_specifiers:
2174                 CONST
2175                 {
2176                         struct ctf_node *node;
2177
2178                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2179                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2180                         node->u.type_specifier.type = TYPESPEC_CONST;
2181                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2182                 }
2183         |       type_specifier
2184                 {
2185                         struct ctf_node *node;
2186
2187                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2188                         node = $1;
2189                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2190                 }
2191         |       IDENTIFIER
2192                 {
2193                         struct ctf_node *node;
2194
2195                         add_type(scanner, $1);
2196                         $$ = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2197                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2198                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
2199                         node->u.type_specifier.id_type = yylval.s;
2200                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2201                 }
2202         |       alias_declaration_specifiers CONST
2203                 {
2204                         struct ctf_node *node;
2205
2206                         $$ = $1;
2207                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2208                         node->u.type_specifier.type = TYPESPEC_CONST;
2209                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2210                 }
2211         |       alias_declaration_specifiers type_specifier
2212                 {
2213                         $$ = $1;
2214                         bt_list_add_tail(&($2)->siblings, &($$)->u.type_specifier_list.head);
2215                 }
2216         |       alias_declaration_specifiers IDENTIFIER
2217                 {
2218                         struct ctf_node *node;
2219
2220                         add_type(scanner, $2);
2221                         $$ = $1;
2222                         node = make_node(scanner, NODE_TYPE_SPECIFIER);
2223                         node->u.type_specifier.type = TYPESPEC_ID_TYPE;
2224                         node->u.type_specifier.id_type = yylval.s;
2225                         bt_list_add_tail(&node->siblings, &($$)->u.type_specifier_list.head);
2226                 }
2227         ;
2228
2229 struct_or_variant_declarator_list:
2230                 struct_or_variant_declarator
2231                 {       $$ = $1;        }
2232         |       struct_or_variant_declarator_list COMMA struct_or_variant_declarator
2233                 {
2234                         $$ = $1;
2235                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2236                 }
2237         ;
2238
2239 struct_or_variant_declarator:
2240                 declarator
2241                 {       $$ = $1;        }
2242         |       COLON unary_expression
2243                 {       $$ = $2;        }
2244         |       declarator COLON unary_expression
2245                 {
2246                         $$ = $1;
2247                         if (set_parent_node($3, $1))
2248                                 reparent_error(scanner, "struct_or_variant_declarator");
2249                 }
2250         ;
2251
2252 enumerator_list:
2253                 enumerator
2254                 {       $$ = $1;        }
2255         |       enumerator_list COMMA enumerator
2256                 {
2257                         $$ = $1;
2258                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2259                 }
2260         ;
2261
2262 enumerator:
2263                 IDENTIFIER
2264                 {
2265                         $$ = make_node(scanner, NODE_ENUMERATOR);
2266                         $$->u.enumerator.id = $1;
2267                 }
2268         |       ID_TYPE
2269                 {
2270                         $$ = make_node(scanner, NODE_ENUMERATOR);
2271                         $$->u.enumerator.id = $1;
2272                 }
2273         |       keywords
2274                 {
2275                         $$ = make_node(scanner, NODE_ENUMERATOR);
2276                         $$->u.enumerator.id = $1;
2277                 }
2278         |       STRING_LITERAL
2279                 {
2280                         $$ = make_node(scanner, NODE_ENUMERATOR);
2281                         $$->u.enumerator.id = $1;
2282                 }
2283         |       IDENTIFIER EQUAL unary_expression_or_range
2284                 {
2285                         $$ = make_node(scanner, NODE_ENUMERATOR);
2286                         $$->u.enumerator.id = $1;
2287                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2288                 }
2289         |       ID_TYPE EQUAL unary_expression_or_range
2290                 {
2291                         $$ = make_node(scanner, NODE_ENUMERATOR);
2292                         $$->u.enumerator.id = $1;
2293                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2294                 }
2295         |       keywords EQUAL unary_expression_or_range
2296                 {
2297                         $$ = make_node(scanner, NODE_ENUMERATOR);
2298                         $$->u.enumerator.id = $1;
2299                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2300                 }
2301         |       STRING_LITERAL EQUAL unary_expression_or_range
2302                 {
2303                         $$ = make_node(scanner, NODE_ENUMERATOR);
2304                         $$->u.enumerator.id = $1;
2305                         bt_list_splice(&($3)->tmp_head, &($$)->u.enumerator.values);
2306                 }
2307         ;
2308
2309 abstract_declarator_list:
2310                 abstract_declarator
2311                 {       $$ = $1;        }
2312         |       abstract_declarator_list COMMA abstract_declarator
2313                 {
2314                         $$ = $1;
2315                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2316                 }
2317         ;
2318
2319 abstract_declarator:
2320                 direct_abstract_declarator
2321                 {       $$ = $1;        }
2322         |       pointer direct_abstract_declarator
2323                 {
2324                         $$ = $2;
2325                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2326                 }
2327         ;
2328
2329 direct_abstract_declarator:
2330                 /* empty */
2331                 {
2332                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2333                         $$->u.type_declarator.type = TYPEDEC_ID;
2334                         /* id is NULL */
2335                 }
2336         |       IDENTIFIER
2337                 {
2338                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2339                         $$->u.type_declarator.type = TYPEDEC_ID;
2340                         $$->u.type_declarator.u.id = $1;
2341                 }
2342         |       LPAREN abstract_declarator RPAREN
2343                 {
2344                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2345                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2346                         $$->u.type_declarator.u.nested.type_declarator = $2;
2347                 }
2348         |       direct_abstract_declarator LSBRAC unary_expression RSBRAC
2349                 {
2350                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2351                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2352                         $$->u.type_declarator.u.nested.type_declarator = $1;
2353                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2354                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2355                 }
2356         |       direct_abstract_declarator LSBRAC RSBRAC
2357                 {
2358                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2359                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2360                         $$->u.type_declarator.u.nested.type_declarator = $1;
2361                         $$->u.type_declarator.u.nested.abstract_array = 1;
2362                 }
2363         ;
2364
2365 alias_abstract_declarator_list:
2366                 alias_abstract_declarator
2367                 {       $$ = $1;        }
2368         |       alias_abstract_declarator_list COMMA alias_abstract_declarator
2369                 {
2370                         $$ = $1;
2371                         bt_list_add_tail(&($3)->siblings, &($$)->tmp_head);
2372                 }
2373         ;
2374
2375 alias_abstract_declarator:
2376                 direct_alias_abstract_declarator
2377                 {       $$ = $1;        }
2378         |       pointer direct_alias_abstract_declarator
2379                 {
2380                         $$ = $2;
2381                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2382                 }
2383         ;
2384
2385 direct_alias_abstract_declarator:
2386                 /* empty */
2387                 {
2388                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2389                         $$->u.type_declarator.type = TYPEDEC_ID;
2390                         /* id is NULL */
2391                 }
2392         |       LPAREN alias_abstract_declarator RPAREN
2393                 {
2394                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2395                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2396                         $$->u.type_declarator.u.nested.type_declarator = $2;
2397                 }
2398         |       direct_alias_abstract_declarator LSBRAC unary_expression RSBRAC
2399                 {
2400                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2401                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2402                         $$->u.type_declarator.u.nested.type_declarator = $1;
2403                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2404                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2405                 }
2406         |       direct_alias_abstract_declarator LSBRAC RSBRAC
2407                 {
2408                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2409                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2410                         $$->u.type_declarator.u.nested.type_declarator = $1;
2411                         $$->u.type_declarator.u.nested.abstract_array = 1;
2412                 }
2413         ;
2414
2415 declarator:
2416                 direct_declarator
2417                 {       $$ = $1;        }
2418         |       pointer direct_declarator
2419                 {
2420                         $$ = $2;
2421                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2422                 }
2423         ;
2424
2425 direct_declarator:
2426                 IDENTIFIER
2427                 {
2428                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2429                         $$->u.type_declarator.type = TYPEDEC_ID;
2430                         $$->u.type_declarator.u.id = $1;
2431                 }
2432         |       LPAREN declarator RPAREN
2433                 {
2434                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2435                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2436                         $$->u.type_declarator.u.nested.type_declarator = $2;
2437                 }
2438         |       direct_declarator LSBRAC unary_expression RSBRAC
2439                 {
2440                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2441                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2442                         $$->u.type_declarator.u.nested.type_declarator = $1;
2443                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2444                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2445                 }
2446         ;
2447
2448 type_declarator:
2449                 direct_type_declarator
2450                 {       $$ = $1;        }
2451         |       pointer direct_type_declarator
2452                 {
2453                         $$ = $2;
2454                         bt_list_splice(&($1)->tmp_head, &($$)->u.type_declarator.pointers);
2455                 }
2456         ;
2457
2458 direct_type_declarator:
2459                 IDENTIFIER
2460                 {
2461                         add_type(scanner, $1);
2462                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2463                         $$->u.type_declarator.type = TYPEDEC_ID;
2464                         $$->u.type_declarator.u.id = $1;
2465                 }
2466         |       LPAREN type_declarator RPAREN
2467                 {
2468                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2469                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2470                         $$->u.type_declarator.u.nested.type_declarator = $2;
2471                 }
2472         |       direct_type_declarator LSBRAC unary_expression RSBRAC
2473                 {
2474                         $$ = make_node(scanner, NODE_TYPE_DECLARATOR);
2475                         $$->u.type_declarator.type = TYPEDEC_NESTED;
2476                         $$->u.type_declarator.u.nested.type_declarator = $1;
2477                         BT_INIT_LIST_HEAD(&($$)->u.type_declarator.u.nested.length);
2478                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.type_declarator.u.nested.length);
2479                 }
2480         ;
2481
2482 pointer:
2483                 STAR
2484                 {
2485                         $$ = make_node(scanner, NODE_POINTER);
2486                 }
2487         |       STAR pointer
2488                 {
2489                         $$ = make_node(scanner, NODE_POINTER);
2490                         bt_list_splice(&($2)->tmp_head, &($$)->tmp_head);
2491                 }
2492         |       STAR type_qualifier_list pointer
2493                 {
2494                         $$ = make_node(scanner, NODE_POINTER);
2495                         $$->u.pointer.const_qualifier = 1;
2496                         bt_list_splice(&($3)->tmp_head, &($$)->tmp_head);
2497                 }
2498         ;
2499
2500 type_qualifier_list:
2501                 /* pointer assumes only const type qualifier */
2502                 CONST
2503         |       type_qualifier_list CONST
2504         ;
2505
2506 /* 2.3: CTF-specific declarations */
2507
2508 ctf_assignment_expression_list:
2509                 ctf_assignment_expression SEMICOLON
2510                 {       $$ = $1;        }
2511         |       ctf_assignment_expression_list ctf_assignment_expression SEMICOLON
2512                 {
2513                         $$ = $1;
2514                         bt_list_add_tail(&($2)->siblings, &($$)->tmp_head);
2515                 }
2516         ;
2517
2518 ctf_assignment_expression:
2519                 unary_expression EQUAL unary_expression
2520                 {
2521                         /*
2522                          * Because we have left and right, cannot use
2523                          * set_parent_node.
2524                          */
2525                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2526                         _bt_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2527                         if ($1->u.unary_expression.type != UNARY_STRING)
2528                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2529                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.ctf_expression.right);
2530                 }
2531         |       unary_expression TYPEASSIGN declaration_specifiers      /* Only allow struct */
2532                 {
2533                         /*
2534                          * Because we have left and right, cannot use
2535                          * set_parent_node.
2536                          */
2537                         $$ = make_node(scanner, NODE_CTF_EXPRESSION);
2538                         _bt_list_splice_tail(&($1)->tmp_head, &($$)->u.ctf_expression.left);
2539                         if ($1->u.unary_expression.type != UNARY_STRING)
2540                                 reparent_error(scanner, "ctf_assignment_expression left expects string");
2541                         bt_list_add_tail(&($3)->siblings, &($$)->u.ctf_expression.right);
2542                 }
2543         |       declaration_specifiers TYPEDEF declaration_specifiers type_declarator_list
2544                 {
2545                         struct ctf_node *list;
2546
2547                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2548                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2549                         _bt_list_splice_tail(&($3)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2550                         $$ = make_node(scanner, NODE_TYPEDEF);
2551                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2552                         _bt_list_splice_tail(&($4)->tmp_head, &($$)->u._typedef.type_declarators);
2553                 }
2554         |       TYPEDEF declaration_specifiers type_declarator_list
2555                 {
2556                         struct ctf_node *list;
2557
2558                         $$ = make_node(scanner, NODE_TYPEDEF);
2559                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2560                         $$->u._typedef.type_specifier_list = list;
2561                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2562                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2563                 }
2564         |       declaration_specifiers TYPEDEF type_declarator_list
2565                 {
2566                         struct ctf_node *list;
2567
2568                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2569                         _bt_list_splice_tail(&($1)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2570                         $$ = make_node(scanner, NODE_TYPEDEF);
2571                         ($$)->u.struct_or_variant_declaration.type_specifier_list = list;
2572                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u._typedef.type_declarators);
2573                 }
2574         |       TYPEALIAS declaration_specifiers abstract_declarator_list TYPEASSIGN alias_declaration_specifiers alias_abstract_declarator_list
2575                 {
2576                         struct ctf_node *list;
2577
2578                         $$ = make_node(scanner, NODE_TYPEALIAS);
2579                         $$->u.typealias.target = make_node(scanner, NODE_TYPEALIAS_TARGET);
2580                         $$->u.typealias.alias = make_node(scanner, NODE_TYPEALIAS_ALIAS);
2581
2582                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2583                         $$->u.typealias.target->u.typealias_target.type_specifier_list = list;
2584                         _bt_list_splice_tail(&($2)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2585                         _bt_list_splice_tail(&($3)->tmp_head, &($$)->u.typealias.target->u.typealias_target.type_declarators);
2586
2587                         list = make_node(scanner, NODE_TYPE_SPECIFIER_LIST);
2588                         $$->u.typealias.alias->u.typealias_alias.type_specifier_list = list;
2589                         _bt_list_splice_tail(&($5)->u.type_specifier_list.head, &list->u.type_specifier_list.head);
2590                         _bt_list_splice_tail(&($6)->tmp_head, &($$)->u.typealias.alias->u.typealias_alias.type_declarators);
2591                 }
2592         ;