cgram.y revision 1.264
1 %{ 2 /* $NetBSD: cgram.y,v 1.264 2021/07/06 20:56:38 rillig Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved. 6 * Copyright (c) 1994, 1995 Jochen Pohl 7 * All Rights Reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Jochen Pohl for 20 * The NetBSD Project. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(__RCSID) && !defined(lint) 38 __RCSID("$NetBSD: cgram.y,v 1.264 2021/07/06 20:56:38 rillig Exp $"); 39 #endif 40 41 #include <limits.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "lint1.h" 46 47 extern char *yytext; 48 49 /* 50 * Contains the level of current declaration, used for symbol table entries. 51 * 0 is the top-level, > 0 is inside a function body. 52 */ 53 int block_level; 54 55 /* 56 * level for memory allocation. Normally the same as block_level. 57 * An exception is the declaration of arguments in prototypes. Memory 58 * for these can't be freed after the declaration, but symbols must 59 * be removed from the symbol table after the declaration. 60 */ 61 int mem_block_level; 62 63 /* 64 * Save the no-warns state and restore it to avoid the problem where 65 * if (expr) { stmt } / * NOLINT * / stmt; 66 */ 67 static int olwarn = LWARN_BAD; 68 69 static void cgram_declare(sym_t *, bool, sbuf_t *); 70 static void ignore_up_to_rparen(void); 71 static sym_t *symbolrename(sym_t *, sbuf_t *); 72 73 74 #ifdef DEBUG 75 static void 76 CLEAR_WARN_FLAGS(const char *file, size_t line) 77 { 78 printf("%s:%d: %s:%zu: clearing flags\n", 79 curr_pos.p_file, curr_pos.p_line, file, line); 80 clear_warn_flags(); 81 olwarn = LWARN_BAD; 82 } 83 84 static void 85 SAVE_WARN_FLAGS(const char *file, size_t line) 86 { 87 lint_assert(olwarn == LWARN_BAD); 88 printf("%s:%d: %s:%zu: saving flags %d\n", 89 curr_pos.p_file, curr_pos.p_line, file, line, lwarn); 90 olwarn = lwarn; 91 } 92 93 static void 94 RESTORE_WARN_FLAGS(const char *file, size_t line) 95 { 96 if (olwarn != LWARN_BAD) { 97 lwarn = olwarn; 98 printf("%s:%d: %s:%zu: restoring flags %d\n", 99 curr_pos.p_file, curr_pos.p_line, file, line, lwarn); 100 olwarn = LWARN_BAD; 101 } else 102 CLEAR_WARN_FLAGS(file, line); 103 } 104 #define cgram_debug(fmt, args...) printf("cgram_debug: " fmt "\n", ##args) 105 #else 106 #define CLEAR_WARN_FLAGS(f, l) clear_warn_flags(), olwarn = LWARN_BAD 107 #define SAVE_WARN_FLAGS(f, l) olwarn = lwarn 108 #define RESTORE_WARN_FLAGS(f, l) \ 109 (void)(olwarn == LWARN_BAD ? (clear_warn_flags(), 0) : (lwarn = olwarn)) 110 #define cgram_debug(fmt, args...) do { } while (false) 111 #endif 112 113 #define clear_warning_flags() CLEAR_WARN_FLAGS(__FILE__, __LINE__) 114 #define save_warning_flags() SAVE_WARN_FLAGS(__FILE__, __LINE__) 115 #define restore_warning_flags() RESTORE_WARN_FLAGS(__FILE__, __LINE__) 116 117 /* unbind the anonymous struct members from the struct */ 118 static void 119 anonymize(sym_t *s) 120 { 121 for ( ; s != NULL; s = s->s_next) 122 s->s_styp = NULL; 123 } 124 %} 125 126 %expect 162 127 128 %union { 129 val_t *y_val; 130 sbuf_t *y_sb; 131 sym_t *y_sym; 132 op_t y_op; 133 scl_t y_scl; 134 tspec_t y_tspec; 135 tqual_t y_tqual; 136 type_t *y_type; 137 tnode_t *y_tnode; 138 range_t y_range; 139 strg_t *y_string; 140 qual_ptr *y_qual_ptr; 141 bool y_seen_statement; 142 struct generic_association *y_generic; 143 }; 144 145 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 146 %token T_POINT T_ARROW 147 %token <y_op> T_UNARY 148 %token <y_op> T_INCDEC 149 %token T_SIZEOF 150 %token T_BUILTIN_OFFSETOF 151 %token T_TYPEOF 152 %token T_EXTENSION 153 %token T_ALIGNAS 154 %token T_ALIGNOF 155 %token T_ASTERISK 156 %token <y_op> T_MULTIPLICATIVE 157 %token <y_op> T_ADDITIVE 158 %token <y_op> T_SHIFT 159 %token <y_op> T_RELATIONAL 160 %token <y_op> T_EQUALITY 161 %token T_AMPER 162 %token T_BITXOR 163 %token T_BITOR 164 %token T_LOGAND 165 %token T_LOGOR 166 %token T_QUEST 167 %token T_COLON 168 %token T_ASSIGN 169 %token <y_op> T_OPASSIGN 170 %token T_COMMA 171 %token T_SEMI 172 %token T_ELLIPSIS 173 %token T_REAL 174 %token T_IMAG 175 %token T_GENERIC 176 %token T_NORETURN 177 178 /* storage classes (extern, static, auto, register and typedef) */ 179 %token <y_scl> T_SCLASS 180 181 /* 182 * predefined type keywords (char, int, short, long, unsigned, signed, 183 * float, double, void); see T_TYPENAME 184 */ 185 %token <y_tspec> T_TYPE 186 187 /* qualifiers (const, volatile, restrict, _Thread_local) */ 188 %token <y_tqual> T_QUAL 189 190 /* struct or union */ 191 %token <y_tspec> T_STRUCT_OR_UNION 192 193 /* remaining keywords */ 194 %token T_ASM 195 %token T_BREAK 196 %token T_CASE 197 %token T_CONTINUE 198 %token T_DEFAULT 199 %token T_DO 200 %token T_ELSE 201 %token T_ENUM 202 %token T_FOR 203 %token T_GOTO 204 %token T_IF 205 %token T_PACKED 206 %token T_RETURN 207 %token T_SWITCH 208 %token T_SYMBOLRENAME 209 %token T_WHILE 210 /* Type Attributes */ 211 %token <y_type> T_ATTRIBUTE 212 %token <y_type> T_AT_ALIAS 213 %token <y_type> T_AT_ALIGNED 214 %token <y_type> T_AT_ALLOC_SIZE 215 %token <y_type> T_AT_ALWAYS_INLINE 216 %token <y_type> T_AT_BOUNDED 217 %token <y_type> T_AT_BUFFER 218 %token <y_type> T_AT_COLD 219 %token <y_type> T_AT_COMMON 220 %token <y_type> T_AT_CONSTRUCTOR 221 %token <y_type> T_AT_DEPRECATED 222 %token <y_type> T_AT_DESTRUCTOR 223 %token <y_type> T_AT_FALLTHROUGH 224 %token <y_type> T_AT_FORMAT 225 %token <y_type> T_AT_FORMAT_ARG 226 %token <y_type> T_AT_FORMAT_GNU_PRINTF 227 %token <y_type> T_AT_FORMAT_PRINTF 228 %token <y_type> T_AT_FORMAT_SCANF 229 %token <y_type> T_AT_FORMAT_STRFMON 230 %token <y_type> T_AT_FORMAT_STRFTIME 231 %token <y_type> T_AT_FORMAT_SYSLOG 232 %token <y_type> T_AT_GNU_INLINE 233 %token <y_type> T_AT_MALLOC 234 %token <y_type> T_AT_MAY_ALIAS 235 %token <y_type> T_AT_MINBYTES 236 %token <y_type> T_AT_MODE 237 %token <y_type> T_AT_NOINLINE 238 %token <y_type> T_AT_NONNULL 239 %token <y_type> T_AT_NONSTRING 240 %token <y_type> T_AT_NORETURN 241 %token <y_type> T_AT_NOTHROW 242 %token <y_type> T_AT_NO_INSTRUMENT_FUNCTION 243 %token <y_type> T_AT_OPTIMIZE 244 %token <y_type> T_AT_PACKED 245 %token <y_type> T_AT_PCS 246 %token <y_type> T_AT_PURE 247 %token <y_type> T_AT_RETURNS_TWICE 248 %token <y_type> T_AT_SECTION 249 %token <y_type> T_AT_SENTINEL 250 %token <y_type> T_AT_STRING 251 %token <y_type> T_AT_TLS_MODEL 252 %token <y_type> T_AT_TUNION 253 %token <y_type> T_AT_UNUSED 254 %token <y_type> T_AT_USED 255 %token <y_type> T_AT_VISIBILITY 256 %token <y_type> T_AT_WARN_UNUSED_RESULT 257 %token <y_type> T_AT_WEAK 258 259 %left T_COMMA 260 %right T_ASSIGN T_OPASSIGN 261 %right T_QUEST T_COLON 262 %left T_LOGOR 263 %left T_LOGAND 264 %left T_BITOR 265 %left T_BITXOR 266 %left T_AMPER 267 %left T_EQUALITY 268 %left T_RELATIONAL 269 %left T_SHIFT 270 %left T_ADDITIVE 271 %left T_ASTERISK T_MULTIPLICATIVE 272 %right T_UNARY T_INCDEC T_SIZEOF T_REAL T_IMAG 273 %left T_LPAREN T_LBRACK T_POINT T_ARROW 274 275 %token <y_sb> T_NAME 276 %token <y_sb> T_TYPENAME 277 %token <y_val> T_CON 278 %token <y_string> T_STRING 279 280 %type <y_sym> func_decl 281 %type <y_sym> notype_decl 282 %type <y_sym> type_decl 283 %type <y_type> typespec 284 %type <y_type> clrtyp_typespec 285 %type <y_type> notype_typespec 286 %type <y_type> struct_spec 287 %type <y_type> enum_spec 288 %type <y_sym> struct_tag 289 %type <y_sym> enum_tag 290 %type <y_tspec> struct 291 %type <y_sym> struct_declaration 292 %type <y_sb> identifier 293 %type <y_sym> member_declaration_list_with_rbrace 294 %type <y_sym> member_declaration_list 295 %type <y_sym> member_declaration 296 %type <y_sym> notype_member_decls 297 %type <y_sym> type_member_decls 298 %type <y_sym> notype_member_decl 299 %type <y_sym> type_member_decl 300 %type <y_tnode> constant_expr 301 %type <y_tnode> array_size 302 %type <y_sym> enum_declaration 303 %type <y_sym> enumerator_list 304 %type <y_sym> enumerator 305 %type <y_sym> enumeration_constant 306 %type <y_sym> notype_direct_decl 307 %type <y_sym> type_direct_decl 308 %type <y_qual_ptr> pointer 309 %type <y_qual_ptr> asterisk 310 %type <y_sym> type_param_decl 311 %type <y_sym> param_list 312 %type <y_sym> abstract_decl_param_list 313 %type <y_sym> direct_param_decl 314 %type <y_sym> notype_param_decl 315 %type <y_sym> direct_notype_param_decl 316 %type <y_qual_ptr> type_qualifier_list_opt 317 %type <y_qual_ptr> type_qualifier_list 318 %type <y_qual_ptr> type_qualifier 319 %type <y_sym> identifier_list 320 %type <y_sym> abstract_declarator 321 %type <y_sym> direct_abstract_declarator 322 %type <y_sym> vararg_parameter_type_list 323 %type <y_sym> parameter_type_list 324 %type <y_sym> parameter_declaration 325 %type <y_tnode> expr 326 %type <y_tnode> assignment_expression 327 %type <y_tnode> gcc_statement_expr_list 328 %type <y_tnode> gcc_statement_expr_item 329 %type <y_tnode> term 330 %type <y_tnode> generic_selection 331 %type <y_tnode> func_arg_list 332 %type <y_op> point_or_arrow 333 %type <y_type> type_name 334 %type <y_sym> abstract_declaration 335 %type <y_tnode> do_while_expr 336 %type <y_tnode> expr_opt 337 %type <y_string> string 338 %type <y_string> string2 339 %type <y_sb> asm_or_symbolrename_opt 340 %type <y_range> range 341 %type <y_seen_statement> block_item_list 342 %type <y_seen_statement> block_item 343 %type <y_generic> generic_assoc_list 344 %type <y_generic> generic_association 345 346 347 %% 348 349 program: 350 /* empty */ { 351 if (sflag) { 352 /* empty translation unit */ 353 error(272); 354 } else if (!tflag) { 355 /* empty translation unit */ 356 warning(272); 357 } 358 } 359 | translation_unit 360 ; 361 362 translation_unit: /* C99 6.9 */ 363 external_declaration 364 | translation_unit external_declaration 365 ; 366 367 external_declaration: /* C99 6.9 */ 368 asm_statement 369 | function_definition { 370 global_clean_up_decl(false); 371 clear_warning_flags(); 372 } 373 | top_level_declaration { 374 global_clean_up_decl(false); 375 clear_warning_flags(); 376 } 377 ; 378 379 /* 380 * On the top level, lint allows several forms of declarations that it doesn't 381 * allow in functions. For example, a single ';' is an empty declaration and 382 * is supported by some compilers, but in a function it would be an empty 383 * statement, not a declaration. This makes a difference in C90 mode, where 384 * a statement must not be followed by a declaration. 385 * 386 * See 'declaration' for all other declarations. 387 */ 388 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 389 T_SEMI { 390 if (sflag) { 391 /* empty declaration */ 392 error(0); 393 } else if (!tflag) { 394 /* empty declaration */ 395 warning(0); 396 } 397 } 398 | clrtyp deftyp notype_init_decls T_SEMI { 399 if (sflag) { 400 /* old style declaration; add 'int' */ 401 error(1); 402 } else if (!tflag) { 403 /* old style declaration; add 'int' */ 404 warning(1); 405 } 406 } 407 | declmods deftyp T_SEMI { 408 if (dcs->d_scl == TYPEDEF) { 409 /* typedef declares no type name */ 410 warning(72); 411 } else { 412 /* empty declaration */ 413 warning(2); 414 } 415 } 416 | declmods deftyp notype_init_decls T_SEMI 417 | declaration_specifiers deftyp T_SEMI { 418 if (dcs->d_scl == TYPEDEF) { 419 /* typedef declares no type name */ 420 warning(72); 421 } else if (!dcs->d_nonempty_decl) { 422 /* empty declaration */ 423 warning(2); 424 } 425 } 426 | declaration_specifiers deftyp type_init_decls T_SEMI 427 | error T_SEMI { 428 global_clean_up(); 429 } 430 | error T_RBRACE { 431 global_clean_up(); 432 } 433 ; 434 435 function_definition: /* C99 6.9.1 */ 436 func_decl { 437 if ($1->s_type->t_tspec != FUNC) { 438 /* syntax error '%s' */ 439 error(249, yytext); 440 YYERROR; 441 } 442 if ($1->s_type->t_typedef) { 443 /* ()-less function definition */ 444 error(64); 445 YYERROR; 446 } 447 funcdef($1); 448 block_level++; 449 begin_declaration_level(ARG); 450 if (lwarn == LWARN_NONE) 451 $1->s_used = true; 452 } arg_declaration_list_opt { 453 end_declaration_level(); 454 block_level--; 455 check_func_lint_directives(); 456 check_func_old_style_arguments(); 457 begin_control_statement(CS_FUNCTION_BODY); 458 } compound_statement { 459 funcend(); 460 end_control_statement(CS_FUNCTION_BODY); 461 } 462 ; 463 464 func_decl: 465 clrtyp deftyp notype_decl { 466 $$ = $3; 467 } 468 | declmods deftyp notype_decl { 469 $$ = $3; 470 } 471 | declaration_specifiers deftyp type_decl { 472 $$ = $3; 473 } 474 ; 475 476 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 477 /* empty */ 478 | arg_declaration_list 479 ; 480 481 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 482 arg_declaration 483 | arg_declaration_list arg_declaration 484 /* XXX or better "arg_declaration error" ? */ 485 | error 486 ; 487 488 /* 489 * "arg_declaration" is separated from "declaration" because it 490 * needs other error handling. 491 */ 492 arg_declaration: 493 declmods deftyp T_SEMI { 494 /* empty declaration */ 495 warning(2); 496 } 497 | declmods deftyp notype_init_decls T_SEMI 498 | declaration_specifiers deftyp T_SEMI { 499 if (!dcs->d_nonempty_decl) { 500 /* empty declaration */ 501 warning(2); 502 } else { 503 /* '%s' declared in argument declaration list */ 504 warning(3, type_name(dcs->d_type)); 505 } 506 } 507 | declaration_specifiers deftyp type_init_decls T_SEMI { 508 if (dcs->d_nonempty_decl) { 509 /* '%s' declared in argument declaration list */ 510 warning(3, type_name(dcs->d_type)); 511 } 512 } 513 | declmods error 514 | declaration_specifiers error 515 ; 516 517 declaration: /* C99 6.7 */ 518 declmods deftyp T_SEMI { 519 if (dcs->d_scl == TYPEDEF) { 520 /* typedef declares no type name */ 521 warning(72); 522 } else { 523 /* empty declaration */ 524 warning(2); 525 } 526 } 527 | declmods deftyp notype_init_decls T_SEMI 528 | declaration_specifiers deftyp T_SEMI { 529 if (dcs->d_scl == TYPEDEF) { 530 /* typedef declares no type name */ 531 warning(72); 532 } else if (!dcs->d_nonempty_decl) { 533 /* empty declaration */ 534 warning(2); 535 } 536 } 537 | declaration_specifiers deftyp type_init_decls T_SEMI 538 | error T_SEMI 539 ; 540 541 clrtyp: 542 /* empty */ { 543 clrtyp(); 544 } 545 ; 546 547 deftyp: 548 /* empty */ { 549 deftyp(); 550 } 551 ; 552 553 declaration_specifiers: /* C99 6.7 */ 554 clrtyp_typespec { 555 add_type($1); 556 } 557 | declmods typespec { 558 add_type($2); 559 } 560 | type_attribute declaration_specifiers 561 | declaration_specifiers declmod 562 | declaration_specifiers notype_typespec { 563 add_type($2); 564 } 565 ; 566 567 declmods: 568 clrtyp T_QUAL { 569 add_qualifier($2); 570 } 571 | clrtyp T_SCLASS { 572 add_storage_class($2); 573 } 574 | declmods declmod 575 ; 576 577 declmod: 578 T_QUAL { 579 add_qualifier($1); 580 } 581 | T_SCLASS { 582 add_storage_class($1); 583 } 584 | type_attribute 585 ; 586 587 clrtyp_typespec: 588 clrtyp notype_typespec { 589 $$ = $2; 590 } 591 | T_TYPENAME clrtyp { 592 $$ = getsym($1)->s_type; 593 } 594 ; 595 596 typespec: 597 notype_typespec 598 | T_TYPENAME { 599 $$ = getsym($1)->s_type; 600 } 601 ; 602 603 notype_typespec: 604 T_TYPE { 605 $$ = gettyp($1); 606 } 607 | T_TYPEOF term { 608 $$ = $2->tn_type; 609 } 610 | struct_spec { 611 end_declaration_level(); 612 $$ = $1; 613 } 614 | enum_spec { 615 end_declaration_level(); 616 $$ = $1; 617 } 618 ; 619 620 struct_spec: 621 struct struct_tag { 622 /* 623 * STDC requires that "struct a;" always introduces 624 * a new tag if "a" is not declared at current level 625 * 626 * yychar is valid because otherwise the parser would not 627 * have been able to decide if it must shift or reduce 628 */ 629 $$ = mktag($2, $1, false, yychar == T_SEMI); 630 } 631 | struct struct_tag { 632 dcs->d_tagtyp = mktag($2, $1, true, false); 633 } struct_declaration { 634 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 635 } 636 | struct { 637 dcs->d_tagtyp = mktag(NULL, $1, true, false); 638 } struct_declaration { 639 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 640 } 641 | struct error { 642 symtyp = FVFT; 643 $$ = gettyp(INT); 644 } 645 ; 646 647 struct: 648 struct type_attribute 649 | T_STRUCT_OR_UNION { 650 symtyp = FTAG; 651 begin_declaration_level($1 == STRUCT ? MOS : MOU); 652 dcs->d_offset = 0; 653 dcs->d_sou_align_in_bits = CHAR_SIZE; 654 $$ = $1; 655 } 656 ; 657 658 struct_tag: 659 identifier { 660 $$ = getsym($1); 661 } 662 ; 663 664 struct_declaration: 665 struct_decl_lbrace member_declaration_list_with_rbrace { 666 $$ = $2; 667 } 668 ; 669 670 struct_decl_lbrace: 671 T_LBRACE { 672 symtyp = FVFT; 673 } 674 ; 675 676 member_declaration_list_with_rbrace: 677 member_declaration_list T_SEMI T_RBRACE 678 | member_declaration_list T_RBRACE { 679 if (sflag) { 680 /* syntax req. ';' after last struct/union member */ 681 error(66); 682 } else { 683 /* syntax req. ';' after last struct/union member */ 684 warning(66); 685 } 686 $$ = $1; 687 } 688 | T_RBRACE { 689 $$ = NULL; 690 } 691 ; 692 693 type_attribute_opt: 694 /* empty */ 695 | type_attribute 696 ; 697 698 member_declaration_list: 699 member_declaration 700 | member_declaration_list T_SEMI member_declaration { 701 $$ = lnklst($1, $3); 702 } 703 ; 704 705 member_declaration: 706 noclass_declmods deftyp { 707 /* too late, i know, but getsym() compensates it */ 708 symtyp = FMEMBER; 709 } notype_member_decls type_attribute_opt { 710 symtyp = FVFT; 711 $$ = $4; 712 } 713 | noclass_declspecs deftyp { 714 symtyp = FMEMBER; 715 } type_member_decls type_attribute_opt { 716 symtyp = FVFT; 717 $$ = $4; 718 } 719 | noclass_declmods deftyp type_attribute_opt { 720 symtyp = FVFT; 721 /* struct or union member must be named */ 722 if (!Sflag) 723 /* anonymous struct/union members is a C9X feature */ 724 warning(49); 725 /* add all the members of the anonymous struct/union */ 726 lint_assert(is_struct_or_union(dcs->d_type->t_tspec)); 727 $$ = dcs->d_type->t_str->sou_first_member; 728 anonymize($$); 729 } 730 | noclass_declspecs deftyp type_attribute_opt { 731 symtyp = FVFT; 732 /* struct or union member must be named */ 733 if (!Sflag) 734 /* anonymous struct/union members is a C9X feature */ 735 warning(49); 736 if (is_struct_or_union(dcs->d_type->t_tspec)) { 737 $$ = dcs->d_type->t_str->sou_first_member; 738 /* add all the members of the anonymous struct/union */ 739 anonymize($$); 740 } else { 741 /* syntax error '%s' */ 742 error(249, "unnamed member"); 743 $$ = NULL; 744 } 745 } 746 | error { 747 symtyp = FVFT; 748 $$ = NULL; 749 } 750 ; 751 752 noclass_declspecs: 753 clrtyp_typespec { 754 add_type($1); 755 } 756 | type_attribute noclass_declspecs 757 | noclass_declmods typespec { 758 add_type($2); 759 } 760 | noclass_declspecs T_QUAL { 761 add_qualifier($2); 762 } 763 | noclass_declspecs notype_typespec { 764 add_type($2); 765 } 766 | noclass_declspecs type_attribute 767 ; 768 769 noclass_declmods: 770 clrtyp T_QUAL { 771 add_qualifier($2); 772 } 773 | noclass_declmods T_QUAL { 774 add_qualifier($2); 775 } 776 ; 777 778 notype_member_decls: 779 notype_member_decl { 780 $$ = declarator_1_struct_union($1); 781 } 782 | notype_member_decls { 783 symtyp = FMEMBER; 784 } T_COMMA type_member_decl { 785 $$ = lnklst($1, declarator_1_struct_union($4)); 786 } 787 ; 788 789 type_member_decls: 790 type_member_decl { 791 $$ = declarator_1_struct_union($1); 792 } 793 | type_member_decls { 794 symtyp = FMEMBER; 795 } T_COMMA type_member_decl { 796 $$ = lnklst($1, declarator_1_struct_union($4)); 797 } 798 ; 799 800 notype_member_decl: 801 notype_decl 802 | notype_decl T_COLON constant_expr { /* C99 6.7.2.1 */ 803 $$ = bitfield($1, to_int_constant($3, true)); 804 } 805 | { 806 symtyp = FVFT; 807 } T_COLON constant_expr { /* C99 6.7.2.1 */ 808 $$ = bitfield(NULL, to_int_constant($3, true)); 809 } 810 ; 811 812 type_member_decl: 813 type_decl 814 | type_decl T_COLON constant_expr { 815 $$ = bitfield($1, to_int_constant($3, true)); 816 } 817 | { 818 symtyp = FVFT; 819 } T_COLON constant_expr { 820 $$ = bitfield(NULL, to_int_constant($3, true)); 821 } 822 ; 823 824 enum_spec: 825 enum enum_tag { 826 $$ = mktag($2, ENUM, false, false); 827 } 828 | enum enum_tag { 829 dcs->d_tagtyp = mktag($2, ENUM, true, false); 830 } enum_declaration { 831 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 832 } 833 | enum { 834 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 835 } enum_declaration { 836 $$ = complete_tag_enum(dcs->d_tagtyp, $3); 837 } 838 | enum error { 839 symtyp = FVFT; 840 $$ = gettyp(INT); 841 } 842 ; 843 844 enum: 845 T_ENUM { 846 symtyp = FTAG; 847 begin_declaration_level(CTCONST); 848 } 849 ; 850 851 enum_tag: 852 identifier { 853 $$ = getsym($1); 854 } 855 ; 856 857 enum_declaration: 858 enum_decl_lbrace enumerator_list enumerator_list_comma_opt T_RBRACE { 859 $$ = $2; 860 } 861 ; 862 863 enum_decl_lbrace: 864 T_LBRACE { 865 symtyp = FVFT; 866 enumval = 0; 867 } 868 ; 869 870 enumerator_list: /* C99 6.7.2.2 */ 871 enumerator 872 | enumerator_list T_COMMA enumerator { 873 $$ = lnklst($1, $3); 874 } 875 | error { 876 $$ = NULL; 877 } 878 ; 879 880 enumerator_list_comma_opt: 881 /* empty */ 882 | T_COMMA { 883 if (sflag) { 884 /* trailing ',' prohibited in enum declaration */ 885 error(54); 886 } else { 887 /* trailing ',' prohibited in enum declaration */ 888 c99ism(54); 889 } 890 } 891 ; 892 893 enumerator: /* C99 6.7.2.2 */ 894 enumeration_constant { 895 $$ = enumeration_constant($1, enumval, true); 896 } 897 | enumeration_constant T_ASSIGN constant_expr { 898 $$ = enumeration_constant($1, to_int_constant($3, true), false); 899 } 900 ; 901 902 enumeration_constant: /* C99 6.4.4.3 */ 903 identifier { 904 $$ = getsym($1); 905 } 906 ; 907 908 909 /* 910 * For an explanation of 'notype' in the following rules, see the Bison 911 * manual, section 7.1 "Semantic Info in Token Kinds". 912 */ 913 914 notype_init_decls: 915 notype_init_decl 916 | notype_init_decls T_COMMA type_init_decl 917 ; 918 919 type_init_decls: 920 type_init_decl 921 | type_init_decls T_COMMA type_init_decl 922 ; 923 924 notype_init_decl: 925 notype_decl asm_or_symbolrename_opt { 926 cgram_declare($1, false, $2); 927 check_size($1); 928 } 929 | notype_decl asm_or_symbolrename_opt { 930 begin_initialization($1); 931 cgram_declare($1, true, $2); 932 } T_ASSIGN initializer { 933 check_size($1); 934 end_initialization(); 935 } 936 ; 937 938 type_init_decl: 939 type_decl asm_or_symbolrename_opt { 940 cgram_declare($1, false, $2); 941 check_size($1); 942 } 943 | type_decl asm_or_symbolrename_opt { 944 begin_initialization($1); 945 cgram_declare($1, true, $2); 946 } T_ASSIGN initializer { 947 check_size($1); 948 end_initialization(); 949 } 950 ; 951 952 notype_decl: 953 notype_direct_decl 954 | pointer notype_direct_decl { 955 $$ = add_pointer($2, $1); 956 } 957 ; 958 959 type_decl: 960 type_direct_decl 961 | pointer type_direct_decl { 962 $$ = add_pointer($2, $1); 963 } 964 ; 965 966 /* 967 * XXX: shift/reduce conflict, caused by: 968 * type_attribute notype_direct_decl 969 * notype_direct_decl type_attribute 970 */ 971 notype_direct_decl: 972 T_NAME { 973 $$ = declarator_name(getsym($1)); 974 } 975 | T_LPAREN type_decl T_RPAREN { 976 $$ = $2; 977 } 978 | type_attribute notype_direct_decl { 979 $$ = $2; 980 } 981 | notype_direct_decl T_LBRACK T_RBRACK { 982 $$ = add_array($1, false, 0); 983 } 984 | notype_direct_decl T_LBRACK array_size T_RBRACK { 985 $$ = add_array($1, true, to_int_constant($3, false)); 986 } 987 | notype_direct_decl param_list asm_or_symbolrename_opt { 988 $$ = add_function(symbolrename($1, $3), $2); 989 end_declaration_level(); 990 block_level--; 991 } 992 | notype_direct_decl type_attribute 993 ; 994 995 /* 996 * XXX: shift/reduce conflict, caused by: 997 * type_attribute type_direct_decl 998 * type_direct_decl type_attribute 999 */ 1000 type_direct_decl: 1001 identifier { 1002 $$ = declarator_name(getsym($1)); 1003 } 1004 | T_LPAREN type_decl T_RPAREN { 1005 $$ = $2; 1006 } 1007 | type_attribute type_direct_decl { 1008 $$ = $2; 1009 } 1010 | type_direct_decl T_LBRACK T_RBRACK { 1011 $$ = add_array($1, false, 0); 1012 } 1013 | type_direct_decl T_LBRACK array_size T_RBRACK { 1014 $$ = add_array($1, true, to_int_constant($3, false)); 1015 } 1016 | type_direct_decl param_list asm_or_symbolrename_opt { 1017 $$ = add_function(symbolrename($1, $3), $2); 1018 end_declaration_level(); 1019 block_level--; 1020 } 1021 | type_direct_decl type_attribute 1022 ; 1023 1024 /* 1025 * The two distinct rules type_param_decl and notype_param_decl avoid a 1026 * conflict in argument lists. A typename enclosed in parentheses is always 1027 * treated as a typename, not an argument name. For example, after 1028 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1029 * "f(int (double));", not "f(int a);". 1030 */ 1031 type_param_decl: 1032 direct_param_decl 1033 | pointer direct_param_decl { 1034 $$ = add_pointer($2, $1); 1035 } 1036 ; 1037 1038 notype_param_decl: 1039 direct_notype_param_decl 1040 | pointer direct_notype_param_decl { 1041 $$ = add_pointer($2, $1); 1042 } 1043 ; 1044 1045 direct_param_decl: 1046 identifier type_attribute_list { 1047 $$ = declarator_name(getsym($1)); 1048 } 1049 | identifier { 1050 $$ = declarator_name(getsym($1)); 1051 } 1052 | T_LPAREN notype_param_decl T_RPAREN { 1053 $$ = $2; 1054 } 1055 | direct_param_decl T_LBRACK T_RBRACK { 1056 $$ = add_array($1, false, 0); 1057 } 1058 | direct_param_decl T_LBRACK array_size T_RBRACK { 1059 $$ = add_array($1, true, to_int_constant($3, false)); 1060 } 1061 | direct_param_decl param_list asm_or_symbolrename_opt { 1062 $$ = add_function(symbolrename($1, $3), $2); 1063 end_declaration_level(); 1064 block_level--; 1065 } 1066 ; 1067 1068 direct_notype_param_decl: 1069 /* XXX: missing identifier type_attribute_list? */ 1070 identifier { 1071 $$ = declarator_name(getsym($1)); 1072 } 1073 | T_LPAREN notype_param_decl T_RPAREN { 1074 $$ = $2; 1075 } 1076 | direct_notype_param_decl T_LBRACK T_RBRACK { 1077 $$ = add_array($1, false, 0); 1078 } 1079 | direct_notype_param_decl T_LBRACK array_size T_RBRACK { 1080 $$ = add_array($1, true, to_int_constant($3, false)); 1081 } 1082 | direct_notype_param_decl param_list asm_or_symbolrename_opt { 1083 $$ = add_function(symbolrename($1, $3), $2); 1084 end_declaration_level(); 1085 block_level--; 1086 } 1087 ; 1088 1089 pointer: /* C99 6.7.5 */ 1090 asterisk type_qualifier_list_opt { 1091 $$ = merge_qualified_pointer($1, $2); 1092 } 1093 | asterisk type_qualifier_list_opt pointer { 1094 $$ = merge_qualified_pointer($1, $2); 1095 $$ = merge_qualified_pointer($$, $3); 1096 } 1097 ; 1098 1099 asterisk: 1100 T_ASTERISK { 1101 $$ = xcalloc(1, sizeof(*$$)); 1102 $$->p_pointer = true; 1103 } 1104 ; 1105 1106 type_qualifier_list_opt: 1107 /* empty */ { 1108 $$ = NULL; 1109 } 1110 | type_qualifier_list 1111 ; 1112 1113 type_qualifier_list: /* C99 6.7.5 */ 1114 type_qualifier 1115 | type_qualifier_list type_qualifier { 1116 $$ = merge_qualified_pointer($1, $2); 1117 } 1118 ; 1119 1120 type_qualifier: 1121 T_QUAL { 1122 $$ = xcalloc(1, sizeof(*$$)); 1123 if ($1 == CONST) { 1124 $$->p_const = true; 1125 } else if ($1 == VOLATILE) { 1126 $$->p_volatile = true; 1127 } else { 1128 lint_assert($1 == RESTRICT || $1 == THREAD); 1129 } 1130 } 1131 ; 1132 1133 align_as: /* See alignment-specifier in C11 6.7.5 */ 1134 typespec 1135 | constant_expr 1136 ; 1137 1138 param_list: 1139 id_list_lparen identifier_list T_RPAREN { 1140 $$ = $2; 1141 } 1142 | abstract_decl_param_list 1143 ; 1144 1145 id_list_lparen: 1146 T_LPAREN { 1147 block_level++; 1148 begin_declaration_level(PROTO_ARG); 1149 } 1150 ; 1151 1152 identifier_list: 1153 T_NAME { 1154 $$ = old_style_function_name(getsym($1)); 1155 } 1156 | identifier_list T_COMMA T_NAME { 1157 $$ = lnklst($1, old_style_function_name(getsym($3))); 1158 } 1159 | identifier_list error 1160 ; 1161 1162 abstract_decl_param_list: 1163 abstract_decl_lparen T_RPAREN type_attribute_opt { 1164 $$ = NULL; 1165 } 1166 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN type_attribute_opt { 1167 dcs->d_proto = true; 1168 $$ = $2; 1169 } 1170 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1171 $$ = NULL; 1172 } 1173 ; 1174 1175 abstract_decl_lparen: 1176 T_LPAREN { 1177 block_level++; 1178 begin_declaration_level(PROTO_ARG); 1179 } 1180 ; 1181 1182 vararg_parameter_type_list: 1183 parameter_type_list 1184 | parameter_type_list T_COMMA T_ELLIPSIS { 1185 dcs->d_vararg = true; 1186 $$ = $1; 1187 } 1188 | T_ELLIPSIS { 1189 if (sflag) { 1190 /* ANSI C requires formal parameter before '...' */ 1191 error(84); 1192 } else if (!tflag) { 1193 /* ANSI C requires formal parameter before '...' */ 1194 warning(84); 1195 } 1196 dcs->d_vararg = true; 1197 $$ = NULL; 1198 } 1199 ; 1200 1201 parameter_type_list: 1202 parameter_declaration 1203 | parameter_type_list T_COMMA parameter_declaration { 1204 $$ = lnklst($1, $3); 1205 } 1206 ; 1207 1208 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1209 parameter_declaration: 1210 declmods deftyp { 1211 $$ = declare_argument(abstract_name(), false); 1212 } 1213 | declaration_specifiers deftyp { 1214 $$ = declare_argument(abstract_name(), false); 1215 } 1216 | declmods deftyp notype_param_decl { 1217 $$ = declare_argument($3, false); 1218 } 1219 | declaration_specifiers deftyp type_param_decl { 1220 $$ = declare_argument($3, false); 1221 } 1222 | declmods deftyp abstract_declarator { 1223 $$ = declare_argument($3, false); 1224 } 1225 | declaration_specifiers deftyp abstract_declarator { 1226 $$ = declare_argument($3, false); 1227 } 1228 ; 1229 1230 asm_or_symbolrename_opt: /* expect only one */ 1231 /* empty */ { 1232 $$ = NULL; 1233 } 1234 | T_ASM T_LPAREN T_STRING T_RPAREN { 1235 freeyyv(&$3, T_STRING); 1236 $$ = NULL; 1237 } 1238 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN { 1239 $$ = $3; 1240 } 1241 ; 1242 1243 initializer: /* C99 6.7.8 "Initialization" */ 1244 expr %prec T_COMMA { 1245 init_expr($1); 1246 } 1247 | init_lbrace init_rbrace { 1248 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1249 } 1250 | init_lbrace initializer_list comma_opt init_rbrace 1251 | error 1252 ; 1253 1254 initializer_list: /* C99 6.7.8 "Initialization" */ 1255 initializer_list_item 1256 | initializer_list T_COMMA initializer_list_item 1257 ; 1258 1259 initializer_list_item: 1260 designation initializer 1261 | initializer 1262 ; 1263 1264 designation: /* C99 6.7.8 "Initialization" */ 1265 designator_list T_ASSIGN 1266 | identifier T_COLON { 1267 /* GCC style struct or union member name in initializer */ 1268 gnuism(315); 1269 add_designator_member($1); 1270 } 1271 ; 1272 1273 designator_list: /* C99 6.7.8 "Initialization" */ 1274 designator 1275 | designator_list designator 1276 ; 1277 1278 designator: /* C99 6.7.8 "Initialization" */ 1279 T_LBRACK range T_RBRACK { 1280 add_designator_subscript($2); 1281 if (!Sflag) 1282 /* array initializer with des.s is a C9X feature */ 1283 warning(321); 1284 } 1285 | T_POINT identifier { 1286 if (!Sflag) 1287 /* struct or union member name in initializer is ... */ 1288 warning(313); 1289 add_designator_member($2); 1290 } 1291 ; 1292 1293 range: 1294 constant_expr { 1295 $$.lo = to_int_constant($1, true); 1296 $$.hi = $$.lo; 1297 } 1298 | constant_expr T_ELLIPSIS constant_expr { 1299 $$.lo = to_int_constant($1, true); 1300 $$.hi = to_int_constant($3, true); 1301 /* initialization with '[a...b]' is a GCC extension */ 1302 gnuism(340); 1303 } 1304 ; 1305 1306 init_lbrace: 1307 T_LBRACE { 1308 init_lbrace(); 1309 } 1310 ; 1311 1312 init_rbrace: 1313 T_RBRACE { 1314 init_rbrace(); 1315 } 1316 ; 1317 1318 type_name: /* C99 6.7.6 */ 1319 { 1320 begin_declaration_level(ABSTRACT); 1321 } abstract_declaration { 1322 end_declaration_level(); 1323 $$ = $2->s_type; 1324 } 1325 ; 1326 1327 abstract_declaration: 1328 noclass_declmods deftyp { 1329 $$ = declare_1_abstract(abstract_name()); 1330 } 1331 | noclass_declspecs deftyp { 1332 $$ = declare_1_abstract(abstract_name()); 1333 } 1334 | noclass_declmods deftyp abstract_declarator { 1335 $$ = declare_1_abstract($3); 1336 } 1337 | noclass_declspecs deftyp abstract_declarator { 1338 $$ = declare_1_abstract($3); 1339 } 1340 ; 1341 1342 abstract_declarator: /* C99 6.7.6 */ 1343 pointer { 1344 $$ = add_pointer(abstract_name(), $1); 1345 } 1346 | direct_abstract_declarator 1347 | pointer direct_abstract_declarator { 1348 $$ = add_pointer($2, $1); 1349 } 1350 | T_TYPEOF term { /* GCC extension */ 1351 $$ = mktempsym($2->tn_type); 1352 } 1353 ; 1354 1355 direct_abstract_declarator: /* C99 6.7.6 */ 1356 T_LPAREN abstract_declarator T_RPAREN { 1357 $$ = $2; 1358 } 1359 | T_LBRACK T_RBRACK { 1360 $$ = add_array(abstract_name(), false, 0); 1361 } 1362 | T_LBRACK array_size T_RBRACK { 1363 $$ = add_array(abstract_name(), true, to_int_constant($2, false)); 1364 } 1365 | type_attribute direct_abstract_declarator { 1366 $$ = $2; 1367 } 1368 | direct_abstract_declarator T_LBRACK T_RBRACK { 1369 $$ = add_array($1, false, 0); 1370 } 1371 | direct_abstract_declarator T_LBRACK T_ASTERISK T_RBRACK { /* C99 */ 1372 $$ = add_array($1, false, 0); 1373 } 1374 | direct_abstract_declarator T_LBRACK array_size T_RBRACK { 1375 $$ = add_array($1, true, to_int_constant($3, false)); 1376 } 1377 | abstract_decl_param_list asm_or_symbolrename_opt { 1378 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1379 end_declaration_level(); 1380 block_level--; 1381 } 1382 | direct_abstract_declarator abstract_decl_param_list asm_or_symbolrename_opt { 1383 $$ = add_function(symbolrename($1, $3), $2); 1384 end_declaration_level(); 1385 block_level--; 1386 } 1387 | direct_abstract_declarator type_attribute 1388 ; 1389 1390 array_size: 1391 type_qualifier_list_opt T_SCLASS constant_expr { 1392 /* C11 6.7.6.3p7 */ 1393 if ($2 != STATIC) 1394 yyerror("Bad attribute"); 1395 /* static array size is a C11 extension */ 1396 c11ism(343); 1397 $$ = $3; 1398 } 1399 | constant_expr 1400 ; 1401 1402 non_expr_statement: 1403 type_attribute T_SEMI 1404 | labeled_statement 1405 | compound_statement 1406 | selection_statement 1407 | iteration_statement 1408 | jump_statement { 1409 seen_fallthrough = false; 1410 } 1411 | asm_statement 1412 ; 1413 1414 statement: /* C99 6.8 */ 1415 expr_statement 1416 | non_expr_statement 1417 ; 1418 1419 labeled_statement: /* C99 6.8.1 */ 1420 label gcc_attribute_list_opt statement 1421 ; 1422 1423 label: 1424 T_NAME T_COLON { 1425 symtyp = FLABEL; 1426 named_label(getsym($1)); 1427 } 1428 | T_CASE constant_expr T_COLON { 1429 case_label($2); 1430 seen_fallthrough = true; 1431 } 1432 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1433 /* XXX: We don't fill all cases */ 1434 case_label($2); 1435 seen_fallthrough = true; 1436 } 1437 | T_DEFAULT T_COLON { 1438 default_label(); 1439 seen_fallthrough = true; 1440 } 1441 ; 1442 1443 compound_statement: /* C99 6.8.2 */ 1444 compound_statement_lbrace compound_statement_rbrace 1445 | compound_statement_lbrace block_item_list compound_statement_rbrace 1446 ; 1447 1448 compound_statement_lbrace: 1449 T_LBRACE { 1450 block_level++; 1451 mem_block_level++; 1452 begin_declaration_level(AUTO); 1453 } 1454 ; 1455 1456 compound_statement_rbrace: 1457 T_RBRACE { 1458 end_declaration_level(); 1459 freeblk(); 1460 mem_block_level--; 1461 block_level--; 1462 seen_fallthrough = false; 1463 } 1464 ; 1465 1466 block_item_list: 1467 block_item 1468 | block_item_list block_item { 1469 if (!Sflag && $1 && !$2) 1470 /* declarations after statements is a C99 feature */ 1471 c99ism(327); 1472 $$ = $1 || $2; 1473 } 1474 ; 1475 1476 block_item: 1477 statement { 1478 $$ = true; 1479 restore_warning_flags(); 1480 } 1481 | declaration { 1482 $$ = false; 1483 restore_warning_flags(); 1484 } 1485 ; 1486 1487 expr_statement: 1488 expr T_SEMI { 1489 expr($1, false, false, false, false); 1490 seen_fallthrough = false; 1491 } 1492 | T_SEMI { 1493 seen_fallthrough = false; 1494 } 1495 ; 1496 1497 selection_statement: /* C99 6.8.4 */ 1498 if_without_else { 1499 save_warning_flags(); 1500 if2(); 1501 if3(false); 1502 } 1503 | if_without_else T_ELSE { 1504 save_warning_flags(); 1505 if2(); 1506 } statement { 1507 clear_warning_flags(); 1508 if3(true); 1509 } 1510 | if_without_else T_ELSE error { 1511 clear_warning_flags(); 1512 if3(false); 1513 } 1514 | switch_expr statement { 1515 clear_warning_flags(); 1516 switch2(); 1517 } 1518 | switch_expr error { 1519 clear_warning_flags(); 1520 switch2(); 1521 } 1522 ; 1523 1524 if_without_else: 1525 if_expr statement 1526 | if_expr error 1527 ; 1528 1529 if_expr: 1530 T_IF T_LPAREN expr T_RPAREN { 1531 if1($3); 1532 clear_warning_flags(); 1533 } 1534 ; 1535 1536 switch_expr: 1537 T_SWITCH T_LPAREN expr T_RPAREN { 1538 switch1($3); 1539 clear_warning_flags(); 1540 } 1541 ; 1542 1543 generic_selection: /* C11 6.5.1.1 */ 1544 T_GENERIC T_LPAREN assignment_expression T_COMMA 1545 generic_assoc_list T_RPAREN { 1546 /* generic selection requires C11 or later */ 1547 c11ism(345); 1548 $$ = build_generic_selection($3, $5); 1549 } 1550 ; 1551 1552 generic_assoc_list: /* C11 6.5.1.1 */ 1553 generic_association 1554 | generic_assoc_list T_COMMA generic_association { 1555 $3->ga_prev = $1; 1556 $$ = $3; 1557 } 1558 ; 1559 1560 generic_association: /* C11 6.5.1.1 */ 1561 type_name T_COLON assignment_expression { 1562 $$ = getblk(sizeof(*$$)); 1563 $$->ga_arg = $1; 1564 $$->ga_result = $3; 1565 } 1566 | T_DEFAULT T_COLON assignment_expression { 1567 $$ = getblk(sizeof(*$$)); 1568 $$->ga_arg = NULL; 1569 $$->ga_result = $3; 1570 } 1571 ; 1572 1573 do_statement: /* C99 6.8.5 */ 1574 do statement { 1575 clear_warning_flags(); 1576 } 1577 ; 1578 1579 iteration_statement: /* C99 6.8.5 */ 1580 while_expr statement { 1581 clear_warning_flags(); 1582 while2(); 1583 } 1584 | while_expr error { 1585 clear_warning_flags(); 1586 while2(); 1587 } 1588 | do_statement do_while_expr { 1589 do2($2); 1590 seen_fallthrough = false; 1591 } 1592 | do error { 1593 clear_warning_flags(); 1594 do2(NULL); 1595 } 1596 | for_exprs statement { 1597 clear_warning_flags(); 1598 for2(); 1599 end_declaration_level(); 1600 block_level--; 1601 } 1602 | for_exprs error { 1603 clear_warning_flags(); 1604 for2(); 1605 end_declaration_level(); 1606 block_level--; 1607 } 1608 ; 1609 1610 while_expr: 1611 T_WHILE T_LPAREN expr T_RPAREN { 1612 while1($3); 1613 clear_warning_flags(); 1614 } 1615 ; 1616 1617 do: 1618 T_DO { 1619 do1(); 1620 } 1621 ; 1622 1623 do_while_expr: 1624 T_WHILE T_LPAREN expr T_RPAREN T_SEMI { 1625 $$ = $3; 1626 } 1627 ; 1628 1629 for_start: 1630 T_FOR T_LPAREN { 1631 begin_declaration_level(AUTO); 1632 block_level++; 1633 } 1634 ; 1635 1636 for_exprs: 1637 for_start declaration_specifiers deftyp notype_init_decls T_SEMI 1638 expr_opt T_SEMI expr_opt T_RPAREN { 1639 /* variable declaration in for loop */ 1640 c99ism(325); 1641 for1(NULL, $6, $8); 1642 clear_warning_flags(); 1643 } 1644 | for_start expr_opt T_SEMI expr_opt T_SEMI expr_opt T_RPAREN { 1645 for1($2, $4, $6); 1646 clear_warning_flags(); 1647 } 1648 ; 1649 1650 expr_opt: 1651 /* empty */ { 1652 $$ = NULL; 1653 } 1654 | expr 1655 ; 1656 1657 jump_statement: /* C99 6.8.6 */ 1658 goto identifier T_SEMI { 1659 do_goto(getsym($2)); 1660 } 1661 | goto error T_SEMI { 1662 symtyp = FVFT; 1663 } 1664 | T_CONTINUE T_SEMI { 1665 do_continue(); 1666 } 1667 | T_BREAK T_SEMI { 1668 do_break(); 1669 } 1670 | T_RETURN T_SEMI { 1671 do_return(NULL); 1672 } 1673 | T_RETURN expr T_SEMI { 1674 do_return($2); 1675 } 1676 ; 1677 1678 goto: 1679 T_GOTO { 1680 symtyp = FLABEL; 1681 } 1682 ; 1683 1684 asm_statement: 1685 T_ASM T_LPAREN read_until_rparen T_SEMI { 1686 setasm(); 1687 } 1688 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1689 setasm(); 1690 } 1691 | T_ASM error 1692 ; 1693 1694 read_until_rparen: 1695 /* empty */ { 1696 ignore_up_to_rparen(); 1697 } 1698 ; 1699 1700 constant_expr_list_opt: 1701 /* empty */ 1702 | constant_expr_list 1703 ; 1704 1705 constant_expr_list: 1706 constant_expr 1707 | constant_expr_list T_COMMA constant_expr 1708 ; 1709 1710 constant_expr: /* C99 6.6 */ 1711 expr %prec T_ASSIGN 1712 ; 1713 1714 expr: 1715 expr T_ASTERISK expr { 1716 $$ = build(MULT, $1, $3); 1717 } 1718 | expr T_MULTIPLICATIVE expr { 1719 $$ = build($2, $1, $3); 1720 } 1721 | expr T_ADDITIVE expr { 1722 $$ = build($2, $1, $3); 1723 } 1724 | expr T_SHIFT expr { 1725 $$ = build($2, $1, $3); 1726 } 1727 | expr T_RELATIONAL expr { 1728 $$ = build($2, $1, $3); 1729 } 1730 | expr T_EQUALITY expr { 1731 $$ = build($2, $1, $3); 1732 } 1733 | expr T_AMPER expr { 1734 $$ = build(BITAND, $1, $3); 1735 } 1736 | expr T_BITXOR expr { 1737 $$ = build(BITXOR, $1, $3); 1738 } 1739 | expr T_BITOR expr { 1740 $$ = build(BITOR, $1, $3); 1741 } 1742 | expr T_LOGAND expr { 1743 $$ = build(LOGAND, $1, $3); 1744 } 1745 | expr T_LOGOR expr { 1746 $$ = build(LOGOR, $1, $3); 1747 } 1748 | expr T_QUEST expr T_COLON expr { 1749 $$ = build(QUEST, $1, build(COLON, $3, $5)); 1750 } 1751 | expr T_ASSIGN expr { 1752 $$ = build(ASSIGN, $1, $3); 1753 } 1754 | expr T_OPASSIGN expr { 1755 $$ = build($2, $1, $3); 1756 } 1757 | expr T_COMMA expr { 1758 $$ = build(COMMA, $1, $3); 1759 } 1760 | term 1761 | generic_selection 1762 ; 1763 1764 assignment_expression: /* C99 6.5.16 */ 1765 expr %prec T_ASSIGN 1766 ; 1767 1768 term: 1769 T_NAME { 1770 /* XXX really necessary? */ 1771 if (yychar < 0) 1772 yychar = yylex(); 1773 $$ = new_name_node(getsym($1), yychar); 1774 } 1775 | string { 1776 $$ = new_string_node($1); 1777 } 1778 | T_CON { 1779 $$ = expr_new_constant(gettyp($1->v_tspec), $1); 1780 } 1781 | T_LPAREN expr T_RPAREN { 1782 if ($2 != NULL) 1783 $2->tn_parenthesized = true; 1784 $$ = $2; 1785 } 1786 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 1787 block_level--; 1788 mem_block_level--; 1789 begin_initialization(mktempsym(dup_type($3->tn_type))); 1790 mem_block_level++; 1791 block_level++; 1792 /* ({ }) is a GCC extension */ 1793 gnuism(320); 1794 } compound_statement_rbrace T_RPAREN { 1795 $$ = new_name_node(*current_initsym(), 0); 1796 end_initialization(); 1797 } 1798 | term T_INCDEC { 1799 $$ = build($2 == INC ? INCAFT : DECAFT, $1, NULL); 1800 } 1801 | T_INCDEC term { 1802 $$ = build($1 == INC ? INCBEF : DECBEF, $2, NULL); 1803 } 1804 | T_ASTERISK term { 1805 $$ = build(INDIR, $2, NULL); 1806 } 1807 | T_AMPER term { 1808 $$ = build(ADDR, $2, NULL); 1809 } 1810 | T_UNARY term { 1811 $$ = build($1, $2, NULL); 1812 } 1813 | T_ADDITIVE term { 1814 if (tflag && $1 == PLUS) { 1815 /* unary + is illegal in traditional C */ 1816 warning(100); 1817 } 1818 $$ = build($1 == PLUS ? UPLUS : UMINUS, $2, NULL); 1819 } 1820 | term T_LBRACK expr T_RBRACK { 1821 $$ = build(INDIR, build(PLUS, $1, $3), NULL); 1822 } 1823 | term T_LPAREN T_RPAREN { 1824 $$ = new_function_call_node($1, NULL); 1825 } 1826 | term T_LPAREN func_arg_list T_RPAREN { 1827 $$ = new_function_call_node($1, $3); 1828 } 1829 | term point_or_arrow T_NAME { 1830 if ($1 != NULL) { 1831 sym_t *msym; 1832 /* 1833 * XXX struct_or_union_member should be integrated 1834 * in build() 1835 */ 1836 if ($2 == ARROW) { 1837 /* 1838 * must do this before struct_or_union_member 1839 * is called 1840 */ 1841 $1 = cconv($1); 1842 } 1843 msym = struct_or_union_member($1, $2, getsym($3)); 1844 $$ = build($2, $1, new_name_node(msym, 0)); 1845 } else { 1846 $$ = NULL; 1847 } 1848 } 1849 | T_REAL term { 1850 $$ = build(REAL, $2, NULL); 1851 } 1852 | T_IMAG term { 1853 $$ = build(IMAG, $2, NULL); 1854 } 1855 | T_EXTENSION term { 1856 $$ = $2; 1857 } 1858 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 1859 symtyp = FMEMBER; 1860 $$ = build_offsetof($3, getsym($5)); 1861 } 1862 | T_SIZEOF term { 1863 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 1864 if ($$ != NULL) 1865 check_expr_misc($2, false, false, false, false, false, true); 1866 } 1867 | T_SIZEOF T_LPAREN type_name T_RPAREN %prec T_SIZEOF { 1868 $$ = build_sizeof($3); 1869 } 1870 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 1871 $$ = build_alignof($3); 1872 } 1873 | T_LPAREN type_name T_RPAREN term %prec T_UNARY { 1874 $$ = cast($4, $2); 1875 } 1876 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 1877 sym_t *tmp = mktempsym($2); 1878 begin_initialization(tmp); 1879 cgram_declare(tmp, true, NULL); 1880 } init_lbrace initializer_list comma_opt init_rbrace { 1881 if (!Sflag) 1882 /* compound literals are a C9X/GCC extension */ 1883 gnuism(319); 1884 $$ = new_name_node(*current_initsym(), 0); 1885 end_initialization(); 1886 } 1887 ; 1888 1889 /* 1890 * The inner part of a GCC statement-expression of the form ({ ... }). 1891 * 1892 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 1893 */ 1894 gcc_statement_expr_list: 1895 gcc_statement_expr_item 1896 | gcc_statement_expr_list gcc_statement_expr_item { 1897 $$ = $2; 1898 } 1899 ; 1900 1901 gcc_statement_expr_item: 1902 declaration { 1903 clear_warning_flags(); 1904 $$ = NULL; 1905 } 1906 | non_expr_statement { 1907 $$ = expr_zalloc_tnode(); 1908 $$->tn_type = gettyp(VOID); 1909 } 1910 | expr T_SEMI { 1911 if ($1 == NULL) { /* in case of syntax errors */ 1912 $$ = expr_zalloc_tnode(); 1913 $$->tn_type = gettyp(VOID); 1914 } else { 1915 /* XXX: do that only on the last name */ 1916 if ($1->tn_op == NAME) 1917 $1->tn_sym->s_used = true; 1918 $$ = $1; 1919 expr($1, false, false, false, false); 1920 seen_fallthrough = false; 1921 } 1922 } 1923 ; 1924 1925 string: 1926 T_STRING 1927 | T_STRING string2 { 1928 $$ = cat_strings($1, $2); 1929 } 1930 ; 1931 1932 string2: 1933 T_STRING { 1934 if (tflag) { 1935 /* concatenated strings are illegal in traditional C */ 1936 warning(219); 1937 } 1938 $$ = $1; 1939 } 1940 | string2 T_STRING { 1941 $$ = cat_strings($1, $2); 1942 } 1943 ; 1944 1945 func_arg_list: 1946 expr %prec T_COMMA { 1947 $$ = new_function_argument_node(NULL, $1); 1948 } 1949 | func_arg_list T_COMMA expr { 1950 $$ = new_function_argument_node($1, $3); 1951 } 1952 ; 1953 1954 point_or_arrow: 1955 T_POINT { 1956 symtyp = FMEMBER; 1957 $$ = POINT; 1958 } 1959 | T_ARROW { 1960 symtyp = FMEMBER; 1961 $$ = ARROW; 1962 } 1963 ; 1964 1965 identifier: /* C99 6.4.2.1 */ 1966 T_NAME { 1967 $$ = $1; 1968 cgram_debug("name '%s'", $$->sb_name); 1969 } 1970 | T_TYPENAME { 1971 $$ = $1; 1972 cgram_debug("typename '%s'", $$->sb_name); 1973 } 1974 ; 1975 1976 comma_opt: 1977 /* empty */ 1978 | T_COMMA 1979 ; 1980 1981 /* GCC extensions */ 1982 1983 type_attribute_list: 1984 type_attribute 1985 | type_attribute_list type_attribute 1986 ; 1987 1988 type_attribute: 1989 gcc_attribute 1990 | T_ALIGNAS T_LPAREN align_as T_RPAREN 1991 | T_PACKED { 1992 addpacked(); 1993 } 1994 | T_NORETURN 1995 ; 1996 1997 gcc_attribute_list_opt: 1998 /* empty */ 1999 | gcc_attribute_list 2000 ; 2001 2002 gcc_attribute_list: 2003 gcc_attribute 2004 | gcc_attribute_list gcc_attribute 2005 ; 2006 2007 /* https://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html */ 2008 gcc_attribute: 2009 T_ATTRIBUTE T_LPAREN T_LPAREN { 2010 attron = true; 2011 } gcc_attribute_spec_list { 2012 attron = false; 2013 } T_RPAREN T_RPAREN 2014 ; 2015 2016 gcc_attribute_spec_list: 2017 gcc_attribute_spec 2018 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2019 ; 2020 2021 gcc_attribute_spec: 2022 /* empty */ 2023 | T_AT_ALWAYS_INLINE 2024 | T_AT_ALIAS T_LPAREN string T_RPAREN 2025 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2026 | T_AT_ALIGNED 2027 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2028 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2029 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2030 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2031 | T_AT_COLD 2032 | T_AT_COMMON 2033 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2034 | T_AT_CONSTRUCTOR 2035 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2036 | T_AT_DEPRECATED 2037 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2038 | T_AT_DESTRUCTOR 2039 | T_AT_FALLTHROUGH { 2040 fallthru(1); 2041 } 2042 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2043 constant_expr T_COMMA constant_expr T_RPAREN 2044 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2045 | T_AT_GNU_INLINE 2046 | T_AT_MALLOC 2047 | T_AT_MAY_ALIAS 2048 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2049 | T_AT_NOINLINE 2050 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2051 | T_AT_NONNULL 2052 | T_AT_NONSTRING 2053 | T_AT_NORETURN 2054 | T_AT_NOTHROW 2055 | T_AT_NO_INSTRUMENT_FUNCTION 2056 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2057 | T_AT_PACKED { 2058 addpacked(); 2059 } 2060 | T_AT_PCS T_LPAREN string T_RPAREN 2061 | T_AT_PURE 2062 | T_AT_RETURNS_TWICE 2063 | T_AT_SECTION T_LPAREN string T_RPAREN 2064 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2065 | T_AT_SENTINEL 2066 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2067 | T_AT_TUNION 2068 | T_AT_UNUSED { 2069 add_attr_used(); 2070 } 2071 | T_AT_USED { 2072 add_attr_used(); 2073 } 2074 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2075 | T_AT_WARN_UNUSED_RESULT 2076 | T_AT_WEAK 2077 | T_QUAL { 2078 if ($1 != CONST) 2079 yyerror("Bad attribute"); 2080 } 2081 ; 2082 2083 gcc_attribute_bounded: 2084 T_AT_MINBYTES 2085 | T_AT_STRING 2086 | T_AT_BUFFER 2087 ; 2088 2089 gcc_attribute_format: 2090 T_AT_FORMAT_GNU_PRINTF 2091 | T_AT_FORMAT_PRINTF 2092 | T_AT_FORMAT_SCANF 2093 | T_AT_FORMAT_STRFMON 2094 | T_AT_FORMAT_STRFTIME 2095 | T_AT_FORMAT_SYSLOG 2096 ; 2097 2098 %% 2099 2100 /* ARGSUSED */ 2101 int 2102 yyerror(const char *msg) 2103 { 2104 /* syntax error '%s' */ 2105 error(249, yytext); 2106 if (++sytxerr >= 5) 2107 norecover(); 2108 return 0; 2109 } 2110 2111 static void 2112 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2113 { 2114 declare(decl, initflg, renaming); 2115 if (renaming != NULL) 2116 freeyyv(&renaming, T_NAME); 2117 } 2118 2119 /* 2120 * Discard all input tokens up to and including the next 2121 * unmatched right paren 2122 */ 2123 static void 2124 ignore_up_to_rparen(void) 2125 { 2126 int level; 2127 2128 if (yychar < 0) 2129 yychar = yylex(); 2130 freeyyv(&yylval, yychar); 2131 2132 level = 1; 2133 while (yychar != T_RPAREN || --level > 0) { 2134 if (yychar == T_LPAREN) { 2135 level++; 2136 } else if (yychar <= 0) { 2137 break; 2138 } 2139 freeyyv(&yylval, yychar = yylex()); 2140 } 2141 2142 yyclearin; 2143 } 2144 2145 static sym_t * 2146 symbolrename(sym_t *s, sbuf_t *sb) 2147 { 2148 if (sb != NULL) 2149 s->s_rename = sb->sb_name; 2150 return s; 2151 } 2152
Indexes created Fri Oct 03 02:09:57 GMT 2025