cgram.y revision 1.410
1 %{ 2 /* $NetBSD: cgram.y,v 1.410 2022/04/30 22:31:23 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 1.410 2022/04/30 22:31:23 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 size_t 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 read_until_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 debug_step("%s:%zu: clearing flags", file, line); 79 clear_warn_flags(); 80 olwarn = LWARN_BAD; 81 } 82 83 static void 84 SAVE_WARN_FLAGS(const char *file, size_t line) 85 { 86 lint_assert(olwarn == LWARN_BAD); 87 debug_step("%s:%zu: saving flags %d", file, line, lwarn); 88 olwarn = lwarn; 89 } 90 91 static void 92 RESTORE_WARN_FLAGS(const char *file, size_t line) 93 { 94 if (olwarn != LWARN_BAD) { 95 lwarn = olwarn; 96 debug_step("%s:%zu: restoring flags %d", file, line, lwarn); 97 olwarn = LWARN_BAD; 98 } else 99 CLEAR_WARN_FLAGS(file, line); 100 } 101 #else 102 #define CLEAR_WARN_FLAGS(f, l) clear_warn_flags(), olwarn = LWARN_BAD 103 #define SAVE_WARN_FLAGS(f, l) olwarn = lwarn 104 #define RESTORE_WARN_FLAGS(f, l) \ 105 (void)(olwarn == LWARN_BAD ? (clear_warn_flags(), 0) : (lwarn = olwarn)) 106 #endif 107 108 #define clear_warning_flags() CLEAR_WARN_FLAGS(__FILE__, __LINE__) 109 #define save_warning_flags() SAVE_WARN_FLAGS(__FILE__, __LINE__) 110 #define restore_warning_flags() RESTORE_WARN_FLAGS(__FILE__, __LINE__) 111 112 /* unbind the anonymous struct members from the struct */ 113 static void 114 anonymize(sym_t *s) 115 { 116 for ( ; s != NULL; s = s->s_next) 117 s->u.s_member.sm_sou_type = NULL; 118 } 119 120 #if YYDEBUG && (YYBYACC || YYBISON) 121 #define YYSTYPE_TOSTRING cgram_to_string 122 #endif 123 #if YYDEBUG && YYBISON 124 #define YYPRINT cgram_print 125 #endif 126 127 %} 128 129 %expect 129 130 131 %union { 132 val_t *y_val; 133 sbuf_t *y_name; 134 sym_t *y_sym; 135 op_t y_op; 136 scl_t y_scl; 137 tspec_t y_tspec; 138 tqual_t y_tqual; 139 type_t *y_type; 140 tnode_t *y_tnode; 141 range_t y_range; 142 strg_t *y_string; 143 qual_ptr *y_qual_ptr; 144 bool y_seen_statement; 145 struct generic_association *y_generic; 146 struct array_size y_array_size; 147 bool y_in_system_header; 148 }; 149 150 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 151 %token T_POINT T_ARROW 152 %token T_COMPLEMENT T_LOGNOT 153 %token <y_op> T_INCDEC 154 %token T_SIZEOF 155 %token T_BUILTIN_OFFSETOF 156 %token T_TYPEOF 157 %token T_EXTENSION 158 %token T_ALIGNAS 159 %token T_ALIGNOF 160 %token T_ASTERISK 161 %token <y_op> T_MULTIPLICATIVE 162 %token <y_op> T_ADDITIVE 163 %token <y_op> T_SHIFT 164 %token <y_op> T_RELATIONAL 165 %token <y_op> T_EQUALITY 166 %token T_AMPER 167 %token T_BITXOR 168 %token T_BITOR 169 %token T_LOGAND 170 %token T_LOGOR 171 %token T_QUEST 172 %token T_COLON 173 %token T_ASSIGN 174 %token <y_op> T_OPASSIGN 175 %token T_COMMA 176 %token T_SEMI 177 %token T_ELLIPSIS 178 %token T_REAL 179 %token T_IMAG 180 %token T_GENERIC 181 %token T_NORETURN 182 183 /* storage classes (extern, static, auto, register and typedef) */ 184 %token <y_scl> T_SCLASS 185 186 /* 187 * predefined type keywords (char, int, short, long, unsigned, signed, 188 * float, double, void); see T_TYPENAME for types from typedef 189 */ 190 %token <y_tspec> T_TYPE 191 192 /* qualifiers (const, volatile, restrict, _Thread_local) */ 193 %token <y_tqual> T_QUAL 194 195 /* struct or union */ 196 %token <y_tspec> T_STRUCT_OR_UNION 197 198 /* remaining keywords */ 199 %token T_ASM 200 %token T_BREAK 201 %token T_CASE 202 %token T_CONTINUE 203 %token T_DEFAULT 204 %token T_DO 205 %token T_ELSE 206 %token T_ENUM 207 %token T_FOR 208 %token T_GOTO 209 %token T_IF 210 %token T_PACKED 211 %token T_RETURN 212 %token T_SWITCH 213 %token T_SYMBOLRENAME 214 %token T_WHILE 215 %token T_STATIC_ASSERT 216 217 %token T_ATTRIBUTE 218 %token T_AT_ALIAS 219 %token T_AT_ALIGNED 220 %token T_AT_ALLOC_SIZE 221 %token T_AT_ALWAYS_INLINE 222 %token T_AT_BOUNDED 223 %token T_AT_BUFFER 224 %token T_AT_COLD 225 %token T_AT_COMMON 226 %token T_AT_CONSTRUCTOR 227 %token T_AT_DEPRECATED 228 %token T_AT_DESTRUCTOR 229 %token T_AT_DISABLE_SANITIZER_INSTRUMENTATION 230 %token T_AT_FALLTHROUGH 231 %token T_AT_FORMAT 232 %token T_AT_FORMAT_ARG 233 %token T_AT_FORMAT_GNU_PRINTF 234 %token T_AT_FORMAT_PRINTF 235 %token T_AT_FORMAT_SCANF 236 %token T_AT_FORMAT_STRFMON 237 %token T_AT_FORMAT_STRFTIME 238 %token T_AT_FORMAT_SYSLOG 239 %token T_AT_GNU_INLINE 240 %token T_AT_HOT 241 %token T_AT_MALLOC 242 %token T_AT_MAY_ALIAS 243 %token T_AT_MINBYTES 244 %token T_AT_MODE 245 %token T_AT_NO_SANITIZE 246 %token T_AT_NO_SANITIZE_THREAD 247 %token T_AT_NOINLINE 248 %token T_AT_NONNULL 249 %token T_AT_NONSTRING 250 %token T_AT_NORETURN 251 %token T_AT_NOTHROW 252 %token T_AT_NO_INSTRUMENT_FUNCTION 253 %token T_AT_OPTIMIZE 254 %token T_AT_OPTNONE 255 %token T_AT_PACKED 256 %token T_AT_PCS 257 %token T_AT_PURE 258 %token T_AT_REGPARM 259 %token T_AT_RETURNS_NONNULL 260 %token T_AT_RETURNS_TWICE 261 %token T_AT_SECTION 262 %token T_AT_SENTINEL 263 %token T_AT_STRING 264 %token T_AT_TARGET 265 %token T_AT_TLS_MODEL 266 %token T_AT_TUNION 267 %token T_AT_UNUSED 268 %token T_AT_USED 269 %token T_AT_VISIBILITY 270 %token T_AT_WARN_UNUSED_RESULT 271 %token T_AT_WEAK 272 273 %left T_THEN 274 %left T_ELSE 275 %right T_QUEST T_COLON 276 %left T_LOGOR 277 %left T_LOGAND 278 %left T_BITOR 279 %left T_BITXOR 280 %left T_AMPER 281 %left T_EQUALITY 282 %left T_RELATIONAL 283 %left T_SHIFT 284 %left T_ADDITIVE 285 %left T_ASTERISK T_MULTIPLICATIVE 286 287 %token <y_name> T_NAME 288 %token <y_name> T_TYPENAME 289 %token <y_val> T_CON 290 %token <y_string> T_STRING 291 292 %type <y_sym> identifier_sym 293 %type <y_name> identifier 294 %type <y_string> string 295 296 %type <y_tnode> primary_expression 297 %type <y_tnode> generic_selection 298 %type <y_generic> generic_assoc_list 299 %type <y_generic> generic_association 300 %type <y_tnode> postfix_expression 301 %type <y_tnode> gcc_statement_expr_list 302 %type <y_tnode> gcc_statement_expr_item 303 %type <y_op> point_or_arrow 304 %type <y_tnode> argument_expression_list 305 %type <y_tnode> unary_expression 306 %type <y_tnode> cast_expression 307 %type <y_tnode> conditional_expression 308 %type <y_tnode> assignment_expression 309 %type <y_tnode> expression_opt 310 %type <y_tnode> expression 311 %type <y_tnode> constant_expr 312 313 %type <y_type> begin_type_typespec 314 %type <y_type> type_specifier 315 %type <y_type> notype_type_specifier 316 %type <y_type> struct_or_union_specifier 317 %type <y_tspec> struct_or_union 318 %type <y_sym> braced_struct_declaration_list 319 %type <y_sym> struct_declaration_list_with_rbrace 320 %type <y_sym> struct_declaration_list 321 %type <y_sym> struct_declaration 322 %type <y_sym> notype_struct_declarators 323 %type <y_sym> type_struct_declarators 324 %type <y_sym> notype_struct_declarator 325 %type <y_sym> type_struct_declarator 326 %type <y_type> enum_specifier 327 %type <y_sym> enum_declaration 328 %type <y_sym> enums_with_opt_comma 329 %type <y_sym> enumerator_list 330 %type <y_sym> enumerator 331 %type <y_qual_ptr> type_qualifier 332 %type <y_qual_ptr> pointer 333 %type <y_qual_ptr> asterisk 334 %type <y_qual_ptr> type_qualifier_list_opt 335 %type <y_qual_ptr> type_qualifier_list 336 %type <y_sym> notype_declarator 337 %type <y_sym> type_declarator 338 %type <y_sym> notype_direct_declarator 339 %type <y_sym> type_direct_declarator 340 %type <y_sym> type_param_declarator 341 %type <y_sym> notype_param_declarator 342 %type <y_sym> direct_param_declarator 343 %type <y_sym> direct_notype_param_declarator 344 %type <y_sym> param_list 345 %type <y_array_size> array_size_opt 346 %type <y_tnode> array_size 347 %type <y_sym> identifier_list 348 %type <y_type> type_name 349 %type <y_sym> abstract_declaration 350 %type <y_sym> abstract_declarator 351 %type <y_sym> direct_abstract_declarator 352 %type <y_sym> abstract_decl_param_list 353 %type <y_sym> vararg_parameter_type_list 354 %type <y_sym> parameter_type_list 355 %type <y_sym> parameter_declaration 356 %type <y_range> range 357 %type <y_name> asm_or_symbolrename_opt 358 359 %type <y_seen_statement> block_item_list 360 %type <y_seen_statement> block_item 361 %type <y_tnode> do_while_expr 362 %type <y_sym> func_declarator 363 %type <y_in_system_header> sys 364 365 %{ 366 #if YYDEBUG && YYBISON 367 static inline void cgram_print(FILE *, int, YYSTYPE); 368 #endif 369 %} 370 371 %% 372 373 program: 374 /* empty */ { 375 /* TODO: Make this an error in C99 mode as well. */ 376 if (!allow_trad && !allow_c99) { 377 /* empty translation unit */ 378 error(272); 379 } else if (allow_c90) { 380 /* empty translation unit */ 381 warning(272); 382 } 383 } 384 | translation_unit 385 ; 386 387 identifier_sym: /* helper for struct/union/enum */ 388 identifier { 389 $$ = getsym($1); 390 } 391 ; 392 393 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 394 identifier: 395 T_NAME { 396 debug_step("cgram: name '%s'", $1->sb_name); 397 $$ = $1; 398 } 399 | T_TYPENAME { 400 debug_step("cgram: typename '%s'", $1->sb_name); 401 $$ = $1; 402 } 403 ; 404 405 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 406 string: 407 T_STRING 408 | string T_STRING { 409 if (!allow_c90) { 410 /* concatenated strings are illegal in traditional C */ 411 warning(219); 412 } 413 $$ = cat_strings($1, $2); 414 } 415 ; 416 417 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 418 primary_expression: 419 T_NAME { 420 bool sys_name, sys_next; 421 sys_name = in_system_header; 422 if (yychar < 0) 423 yychar = yylex(); 424 sys_next = in_system_header; 425 in_system_header = sys_name; 426 $$ = build_name(getsym($1), yychar == T_LPAREN); 427 in_system_header = sys_next; 428 } 429 | T_CON { 430 $$ = build_constant(gettyp($1->v_tspec), $1); 431 } 432 | string { 433 $$ = build_string($1); 434 } 435 | T_LPAREN expression T_RPAREN { 436 if ($2 != NULL) 437 $2->tn_parenthesized = true; 438 $$ = $2; 439 } 440 | generic_selection 441 /* GCC primary-expression, see c_parser_postfix_expression */ 442 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 443 symtyp = FMEMBER; 444 $$ = build_offsetof($3, getsym($5)); 445 } 446 ; 447 448 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 449 generic_selection: 450 T_GENERIC T_LPAREN assignment_expression T_COMMA 451 generic_assoc_list T_RPAREN { 452 /* generic selection requires C11 or later */ 453 c11ism(345); 454 $$ = build_generic_selection($3, $5); 455 } 456 ; 457 458 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 459 generic_assoc_list: 460 generic_association 461 | generic_assoc_list T_COMMA generic_association { 462 $3->ga_prev = $1; 463 $$ = $3; 464 } 465 ; 466 467 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 468 generic_association: 469 type_name T_COLON assignment_expression { 470 $$ = block_zero_alloc(sizeof(*$$)); 471 $$->ga_arg = $1; 472 $$->ga_result = $3; 473 } 474 | T_DEFAULT T_COLON assignment_expression { 475 $$ = block_zero_alloc(sizeof(*$$)); 476 $$->ga_arg = NULL; 477 $$->ga_result = $3; 478 } 479 ; 480 481 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 482 postfix_expression: 483 primary_expression 484 | postfix_expression T_LBRACK sys expression T_RBRACK { 485 $$ = build_unary(INDIR, $3, build_binary($1, PLUS, $3, $4)); 486 } 487 | postfix_expression T_LPAREN sys T_RPAREN { 488 $$ = build_function_call($1, $3, NULL); 489 } 490 | postfix_expression T_LPAREN sys argument_expression_list T_RPAREN { 491 $$ = build_function_call($1, $3, $4); 492 } 493 | postfix_expression point_or_arrow sys T_NAME { 494 $$ = build_member_access($1, $2, $3, $4); 495 } 496 | postfix_expression T_INCDEC sys { 497 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $3, $1); 498 } 499 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 500 sym_t *tmp = mktempsym($2); 501 begin_initialization(tmp); 502 cgram_declare(tmp, true, NULL); 503 } init_lbrace initializer_list comma_opt init_rbrace { 504 if (!allow_c99) 505 /* compound literals are a C99/GCC extension */ 506 gnuism(319); 507 $$ = build_name(*current_initsym(), false); 508 end_initialization(); 509 } 510 | T_LPAREN compound_statement_lbrace { 511 begin_statement_expr(); 512 } gcc_statement_expr_list { 513 do_statement_expr($4); 514 } compound_statement_rbrace T_RPAREN { 515 $$ = end_statement_expr(); 516 } 517 ; 518 519 comma_opt: /* helper for 'postfix_expression' */ 520 /* empty */ 521 | T_COMMA 522 ; 523 524 /* 525 * The inner part of a GCC statement-expression of the form ({ ... }). 526 * 527 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 528 */ 529 gcc_statement_expr_list: 530 gcc_statement_expr_item 531 | gcc_statement_expr_list gcc_statement_expr_item { 532 $$ = $2; 533 } 534 ; 535 536 gcc_statement_expr_item: 537 declaration_or_error { 538 clear_warning_flags(); 539 $$ = NULL; 540 } 541 | non_expr_statement { 542 $$ = expr_alloc_tnode(); 543 $$->tn_type = gettyp(VOID); 544 } 545 | expression T_SEMI { 546 if ($1 == NULL) { /* in case of syntax errors */ 547 $$ = expr_alloc_tnode(); 548 $$->tn_type = gettyp(VOID); 549 } else { 550 /* XXX: do that only on the last name */ 551 if ($1->tn_op == NAME) 552 $1->tn_sym->s_used = true; 553 expr($1, false, false, false, false); 554 seen_fallthrough = false; 555 $$ = $1; 556 } 557 } 558 ; 559 560 point_or_arrow: /* helper for 'postfix_expression' */ 561 T_POINT { 562 symtyp = FMEMBER; 563 $$ = POINT; 564 } 565 | T_ARROW { 566 symtyp = FMEMBER; 567 $$ = ARROW; 568 } 569 ; 570 571 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 572 argument_expression_list: 573 assignment_expression { 574 $$ = build_function_argument(NULL, $1); 575 } 576 | argument_expression_list T_COMMA assignment_expression { 577 $$ = build_function_argument($1, $3); 578 } 579 ; 580 581 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 582 unary_expression: 583 postfix_expression 584 | T_INCDEC sys unary_expression { 585 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2, $3); 586 } 587 | T_AMPER sys cast_expression { 588 $$ = build_unary(ADDR, $2, $3); 589 } 590 | T_ASTERISK sys cast_expression { 591 $$ = build_unary(INDIR, $2, $3); 592 } 593 | T_ADDITIVE sys cast_expression { 594 if (!allow_c90 && $1 == PLUS) { 595 /* unary + is illegal in traditional C */ 596 warning(100); 597 } 598 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2, $3); 599 } 600 | T_COMPLEMENT sys cast_expression { 601 $$ = build_unary(COMPL, $2, $3); 602 } 603 | T_LOGNOT sys cast_expression { 604 $$ = build_unary(NOT, $2, $3); 605 } 606 | T_REAL sys cast_expression { /* GCC c_parser_unary_expression */ 607 $$ = build_unary(REAL, $2, $3); 608 } 609 | T_IMAG sys cast_expression { /* GCC c_parser_unary_expression */ 610 $$ = build_unary(IMAG, $2, $3); 611 } 612 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 613 $$ = $2; 614 } 615 | T_SIZEOF unary_expression { 616 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 617 if ($$ != NULL) 618 check_expr_misc($2, 619 false, false, false, false, false, true); 620 } 621 | T_SIZEOF T_LPAREN type_name T_RPAREN { 622 $$ = build_sizeof($3); 623 } 624 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 625 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 626 /* TODO: c11ism */ 627 $$ = build_alignof($3); 628 } 629 ; 630 631 /* The rule 'unary_operator' is inlined into unary_expression. */ 632 633 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 634 cast_expression: 635 unary_expression 636 | T_LPAREN type_name T_RPAREN cast_expression { 637 $$ = cast($4, $2); 638 } 639 ; 640 641 expression_opt: 642 /* empty */ { 643 $$ = NULL; 644 } 645 | expression 646 ; 647 648 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 649 /* 'conditional_expression' also implements 'additive_expression'. */ 650 /* 'conditional_expression' also implements 'shift_expression'. */ 651 /* 'conditional_expression' also implements 'relational_expression'. */ 652 /* 'conditional_expression' also implements 'equality_expression'. */ 653 /* 'conditional_expression' also implements 'AND_expression'. */ 654 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 655 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 656 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 657 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 658 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 659 conditional_expression: 660 cast_expression 661 | conditional_expression T_ASTERISK sys conditional_expression { 662 $$ = build_binary($1, MULT, $3, $4); 663 } 664 | conditional_expression T_MULTIPLICATIVE sys conditional_expression { 665 $$ = build_binary($1, $2, $3, $4); 666 } 667 | conditional_expression T_ADDITIVE sys conditional_expression { 668 $$ = build_binary($1, $2, $3, $4); 669 } 670 | conditional_expression T_SHIFT sys conditional_expression { 671 $$ = build_binary($1, $2, $3, $4); 672 } 673 | conditional_expression T_RELATIONAL sys conditional_expression { 674 $$ = build_binary($1, $2, $3, $4); 675 } 676 | conditional_expression T_EQUALITY sys conditional_expression { 677 $$ = build_binary($1, $2, $3, $4); 678 } 679 | conditional_expression T_AMPER sys conditional_expression { 680 $$ = build_binary($1, BITAND, $3, $4); 681 } 682 | conditional_expression T_BITXOR sys conditional_expression { 683 $$ = build_binary($1, BITXOR, $3, $4); 684 } 685 | conditional_expression T_BITOR sys conditional_expression { 686 $$ = build_binary($1, BITOR, $3, $4); 687 } 688 | conditional_expression T_LOGAND sys conditional_expression { 689 $$ = build_binary($1, LOGAND, $3, $4); 690 } 691 | conditional_expression T_LOGOR sys conditional_expression { 692 $$ = build_binary($1, LOGOR, $3, $4); 693 } 694 | conditional_expression T_QUEST sys 695 expression T_COLON sys conditional_expression { 696 $$ = build_binary($1, QUEST, $3, 697 build_binary($4, COLON, $6, $7)); 698 } 699 ; 700 701 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 702 assignment_expression: 703 conditional_expression 704 | unary_expression T_ASSIGN sys assignment_expression { 705 $$ = build_binary($1, ASSIGN, $3, $4); 706 } 707 | unary_expression T_OPASSIGN sys assignment_expression { 708 $$ = build_binary($1, $2, $3, $4); 709 } 710 ; 711 712 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 713 expression: 714 assignment_expression 715 | expression T_COMMA sys assignment_expression { 716 $$ = build_binary($1, COMMA, $3, $4); 717 } 718 ; 719 720 constant_expr_list_opt: /* helper for gcc_attribute */ 721 /* empty */ 722 | constant_expr_list 723 ; 724 725 constant_expr_list: /* helper for gcc_attribute */ 726 constant_expr 727 | constant_expr_list T_COMMA constant_expr 728 ; 729 730 constant_expr: /* C99 6.6 */ 731 conditional_expression 732 ; 733 734 declaration_or_error: 735 declaration 736 | error T_SEMI 737 ; 738 739 declaration: /* C99 6.7 */ 740 begin_type_declmods end_type T_SEMI { 741 if (dcs->d_scl == TYPEDEF) { 742 /* typedef declares no type name */ 743 warning(72); 744 } else { 745 /* empty declaration */ 746 warning(2); 747 } 748 } 749 | begin_type_declmods end_type notype_init_declarators T_SEMI { 750 if (dcs->d_scl == TYPEDEF) { 751 /* syntax error '%s' */ 752 error(249, "missing base type for typedef"); 753 } else { 754 /* old style declaration; add 'int' */ 755 error(1); 756 } 757 } 758 | begin_type_declaration_specifiers end_type T_SEMI { 759 if (dcs->d_scl == TYPEDEF) { 760 /* typedef declares no type name */ 761 warning(72); 762 } else if (!dcs->d_nonempty_decl) { 763 /* empty declaration */ 764 warning(2); 765 } 766 } 767 | begin_type_declaration_specifiers end_type 768 type_init_declarators T_SEMI 769 | static_assert_declaration 770 ; 771 772 begin_type_declaration_specifiers: /* see C99 6.7 */ 773 begin_type_typespec { 774 add_type($1); 775 } 776 | begin_type_declmods type_specifier { 777 add_type($2); 778 } 779 | type_attribute begin_type_declaration_specifiers 780 | begin_type_declaration_specifiers declmod 781 | begin_type_declaration_specifiers notype_type_specifier { 782 add_type($2); 783 } 784 ; 785 786 begin_type_declmods: /* see C99 6.7 */ 787 begin_type T_QUAL { 788 add_qualifier($2); 789 } 790 | begin_type T_SCLASS { 791 add_storage_class($2); 792 } 793 | begin_type_declmods declmod 794 ; 795 796 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 797 begin_type_specifier_qualifier_list_postfix 798 | type_attribute_list begin_type_specifier_qualifier_list_postfix 799 ; 800 801 begin_type_specifier_qualifier_list_postfix: 802 begin_type_typespec { 803 add_type($1); 804 } 805 | begin_type_qualifier_list type_specifier { 806 add_type($2); 807 } 808 | begin_type_specifier_qualifier_list_postfix T_QUAL { 809 add_qualifier($2); 810 } 811 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 812 add_type($2); 813 } 814 | begin_type_specifier_qualifier_list_postfix type_attribute 815 ; 816 817 begin_type_typespec: 818 begin_type notype_type_specifier { 819 $$ = $2; 820 } 821 | begin_type T_TYPENAME { 822 $$ = getsym($2)->s_type; 823 } 824 ; 825 826 begin_type_qualifier_list: 827 begin_type T_QUAL { 828 add_qualifier($2); 829 } 830 | begin_type_qualifier_list T_QUAL { 831 add_qualifier($2); 832 } 833 ; 834 835 declmod: 836 T_QUAL { 837 add_qualifier($1); 838 } 839 | T_SCLASS { 840 add_storage_class($1); 841 } 842 | type_attribute_list 843 ; 844 845 type_attribute_list_opt: 846 /* empty */ 847 | type_attribute_list 848 ; 849 850 type_attribute_list: 851 type_attribute 852 | type_attribute_list type_attribute 853 ; 854 855 type_attribute_opt: 856 /* empty */ 857 | type_attribute 858 ; 859 860 type_attribute: /* See C11 6.7 declaration-specifiers */ 861 gcc_attribute 862 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 863 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 864 | T_PACKED { 865 addpacked(); 866 } 867 | T_NORETURN 868 ; 869 870 begin_type: 871 /* empty */ { 872 begin_type(); 873 } 874 ; 875 876 end_type: 877 /* empty */ { 878 end_type(); 879 } 880 ; 881 882 type_specifier: /* C99 6.7.2 */ 883 notype_type_specifier 884 | T_TYPENAME { 885 $$ = getsym($1)->s_type; 886 } 887 ; 888 889 notype_type_specifier: /* see C99 6.7.2 */ 890 T_TYPE { 891 $$ = gettyp($1); 892 } 893 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 894 $$ = block_dup_type($3->tn_type); 895 $$->t_typeof = true; 896 } 897 | struct_or_union_specifier { 898 end_declaration_level(); 899 $$ = $1; 900 } 901 | enum_specifier { 902 end_declaration_level(); 903 $$ = $1; 904 } 905 ; 906 907 struct_or_union_specifier: /* C99 6.7.2.1 */ 908 struct_or_union identifier_sym { 909 /* 910 * STDC requires that "struct a;" always introduces 911 * a new tag if "a" is not declared at current level 912 * 913 * yychar is valid because otherwise the parser would not 914 * have been able to decide if it must shift or reduce 915 */ 916 $$ = mktag($2, $1, false, yychar == T_SEMI); 917 } 918 | struct_or_union identifier_sym { 919 dcs->d_tagtyp = mktag($2, $1, true, false); 920 } braced_struct_declaration_list { 921 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 922 } 923 | struct_or_union { 924 dcs->d_tagtyp = mktag(NULL, $1, true, false); 925 } braced_struct_declaration_list { 926 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 927 } 928 | struct_or_union error { 929 symtyp = FVFT; 930 $$ = gettyp(INT); 931 } 932 ; 933 934 struct_or_union: /* C99 6.7.2.1 */ 935 T_STRUCT_OR_UNION { 936 symtyp = FTAG; 937 begin_declaration_level($1 == STRUCT ? DK_MOS : DK_MOU); 938 dcs->d_offset_in_bits = 0; 939 dcs->d_sou_align_in_bits = CHAR_SIZE; 940 $$ = $1; 941 } 942 | struct_or_union type_attribute 943 ; 944 945 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 946 struct_declaration_lbrace struct_declaration_list_with_rbrace { 947 $$ = $2; 948 } 949 ; 950 951 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 952 T_LBRACE { 953 symtyp = FVFT; 954 } 955 ; 956 957 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 958 struct_declaration_list T_RBRACE 959 | T_RBRACE { 960 /* XXX: This is not allowed by any C standard. */ 961 $$ = NULL; 962 } 963 ; 964 965 struct_declaration_list: /* C99 6.7.2.1 */ 966 struct_declaration 967 | struct_declaration_list struct_declaration { 968 $$ = lnklst($1, $2); 969 } 970 ; 971 972 struct_declaration: /* C99 6.7.2.1 */ 973 begin_type_qualifier_list end_type { 974 /* ^^ There is no check for the missing type-specifier. */ 975 /* too late, i know, but getsym() compensates it */ 976 symtyp = FMEMBER; 977 } notype_struct_declarators type_attribute_opt T_SEMI { 978 symtyp = FVFT; 979 $$ = $4; 980 } 981 | begin_type_specifier_qualifier_list end_type { 982 symtyp = FMEMBER; 983 } type_struct_declarators type_attribute_opt T_SEMI { 984 symtyp = FVFT; 985 $$ = $4; 986 } 987 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 988 /* syntax error '%s' */ 989 error(249, "member without type"); 990 $$ = NULL; 991 } 992 | begin_type_specifier_qualifier_list end_type type_attribute_opt 993 T_SEMI { 994 symtyp = FVFT; 995 if (!allow_c11 && !allow_gcc) 996 /* anonymous struct/union members is a C11 feature */ 997 warning(49); 998 if (is_struct_or_union(dcs->d_type->t_tspec)) { 999 $$ = dcs->d_type->t_str->sou_first_member; 1000 /* add all the members of the anonymous struct/union */ 1001 anonymize($$); 1002 } else { 1003 /* syntax error '%s' */ 1004 error(249, "unnamed member"); 1005 $$ = NULL; 1006 } 1007 } 1008 | static_assert_declaration { 1009 $$ = NULL; 1010 } 1011 | error T_SEMI { 1012 symtyp = FVFT; 1013 $$ = NULL; 1014 } 1015 ; 1016 1017 notype_struct_declarators: 1018 notype_struct_declarator { 1019 $$ = declarator_1_struct_union($1); 1020 } 1021 | notype_struct_declarators { 1022 symtyp = FMEMBER; 1023 } T_COMMA type_struct_declarator { 1024 $$ = lnklst($1, declarator_1_struct_union($4)); 1025 } 1026 ; 1027 1028 type_struct_declarators: 1029 type_struct_declarator { 1030 $$ = declarator_1_struct_union($1); 1031 } 1032 | type_struct_declarators { 1033 symtyp = FMEMBER; 1034 } T_COMMA type_struct_declarator { 1035 $$ = lnklst($1, declarator_1_struct_union($4)); 1036 } 1037 ; 1038 1039 notype_struct_declarator: 1040 notype_declarator 1041 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1042 $$ = bitfield($1, to_int_constant($3, true)); 1043 } 1044 | { 1045 symtyp = FVFT; 1046 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1047 $$ = bitfield(NULL, to_int_constant($3, true)); 1048 } 1049 ; 1050 1051 type_struct_declarator: 1052 type_declarator 1053 | type_declarator T_COLON constant_expr { 1054 $$ = bitfield($1, to_int_constant($3, true)); 1055 } 1056 | { 1057 symtyp = FVFT; 1058 } T_COLON constant_expr { 1059 $$ = bitfield(NULL, to_int_constant($3, true)); 1060 } 1061 ; 1062 1063 /* K&R ---, C90 6.5.2.2, C99 6.7.2.2, C11 6.7.2.2 */ 1064 enum_specifier: /* C99 6.7.2.2 */ 1065 enum gcc_attribute_list_opt identifier_sym { 1066 $$ = mktag($3, ENUM, false, false); 1067 } 1068 | enum gcc_attribute_list_opt identifier_sym { 1069 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1070 } enum_declaration /*gcc_attribute_list_opt*/ { 1071 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1072 } 1073 | enum gcc_attribute_list_opt { 1074 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1075 } enum_declaration /*gcc_attribute_list_opt*/ { 1076 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1077 } 1078 | enum error { 1079 symtyp = FVFT; 1080 $$ = gettyp(INT); 1081 } 1082 ; 1083 1084 enum: /* helper for C99 6.7.2.2 */ 1085 T_ENUM { 1086 symtyp = FTAG; 1087 begin_declaration_level(DK_ENUM_CONST); 1088 } 1089 ; 1090 1091 enum_declaration: /* helper for C99 6.7.2.2 */ 1092 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1093 $$ = $2; 1094 } 1095 ; 1096 1097 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1098 T_LBRACE { 1099 symtyp = FVFT; 1100 enumval = 0; 1101 } 1102 ; 1103 1104 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1105 enumerator_list 1106 | enumerator_list T_COMMA { 1107 if (!allow_c99 && !allow_trad) { 1108 /* trailing ',' prohibited in enum declaration */ 1109 error(54); 1110 } else { 1111 /* trailing ',' prohibited in enum declaration */ 1112 c99ism(54); 1113 } 1114 $$ = $1; 1115 } 1116 ; 1117 1118 enumerator_list: /* C99 6.7.2.2 */ 1119 enumerator 1120 | enumerator_list T_COMMA enumerator { 1121 $$ = lnklst($1, $3); 1122 } 1123 | error { 1124 $$ = NULL; 1125 } 1126 ; 1127 1128 enumerator: /* C99 6.7.2.2 */ 1129 identifier_sym gcc_attribute_list_opt { 1130 $$ = enumeration_constant($1, enumval, true); 1131 } 1132 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1133 $$ = enumeration_constant($1, to_int_constant($4, true), 1134 false); 1135 } 1136 ; 1137 1138 type_qualifier: /* C99 6.7.3 */ 1139 T_QUAL { 1140 $$ = xcalloc(1, sizeof(*$$)); 1141 if ($1 == CONST) 1142 $$->p_const = true; 1143 if ($1 == VOLATILE) 1144 $$->p_volatile = true; 1145 } 1146 ; 1147 1148 pointer: /* C99 6.7.5 */ 1149 asterisk type_qualifier_list_opt { 1150 $$ = merge_qualified_pointer($1, $2); 1151 } 1152 | asterisk type_qualifier_list_opt pointer { 1153 $$ = merge_qualified_pointer($1, $2); 1154 $$ = merge_qualified_pointer($$, $3); 1155 } 1156 ; 1157 1158 asterisk: /* helper for 'pointer' */ 1159 T_ASTERISK { 1160 $$ = xcalloc(1, sizeof(*$$)); 1161 $$->p_pointer = true; 1162 } 1163 ; 1164 1165 type_qualifier_list_opt: /* see C99 6.7.5 */ 1166 /* empty */ { 1167 $$ = NULL; 1168 } 1169 | type_qualifier_list 1170 ; 1171 1172 type_qualifier_list: /* C99 6.7.5 */ 1173 type_qualifier 1174 | type_qualifier_list type_qualifier { 1175 $$ = merge_qualified_pointer($1, $2); 1176 } 1177 ; 1178 1179 /* 1180 * For an explanation of 'notype' in the following rules, see 1181 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1182 */ 1183 1184 notype_init_declarators: 1185 notype_init_declarator 1186 | notype_init_declarators T_COMMA type_init_declarator 1187 ; 1188 1189 type_init_declarators: 1190 type_init_declarator 1191 | type_init_declarators T_COMMA type_init_declarator 1192 ; 1193 1194 notype_init_declarator: 1195 notype_declarator asm_or_symbolrename_opt { 1196 cgram_declare($1, false, $2); 1197 check_size($1); 1198 } 1199 | notype_declarator asm_or_symbolrename_opt { 1200 begin_initialization($1); 1201 cgram_declare($1, true, $2); 1202 } T_ASSIGN initializer { 1203 check_size($1); 1204 end_initialization(); 1205 } 1206 ; 1207 1208 type_init_declarator: 1209 type_declarator asm_or_symbolrename_opt { 1210 cgram_declare($1, false, $2); 1211 check_size($1); 1212 } 1213 | type_declarator asm_or_symbolrename_opt { 1214 begin_initialization($1); 1215 cgram_declare($1, true, $2); 1216 } T_ASSIGN initializer { 1217 check_size($1); 1218 end_initialization(); 1219 } 1220 ; 1221 1222 notype_declarator: 1223 notype_direct_declarator 1224 | pointer notype_direct_declarator { 1225 $$ = add_pointer($2, $1); 1226 } 1227 ; 1228 1229 type_declarator: 1230 type_direct_declarator 1231 | pointer type_direct_declarator { 1232 $$ = add_pointer($2, $1); 1233 } 1234 ; 1235 1236 notype_direct_declarator: 1237 type_attribute_list_opt T_NAME { 1238 $$ = declarator_name(getsym($2)); 1239 } 1240 | type_attribute_list_opt T_LPAREN type_declarator T_RPAREN { 1241 $$ = $3; 1242 } 1243 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1244 $$ = add_array($1, $3.has_dim, $3.dim); 1245 } 1246 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1247 $$ = add_function(symbolrename($1, $3), $2); 1248 end_declaration_level(); 1249 block_level--; 1250 } 1251 | notype_direct_declarator type_attribute 1252 ; 1253 1254 type_direct_declarator: 1255 type_attribute_list_opt identifier { 1256 $$ = declarator_name(getsym($2)); 1257 } 1258 | type_attribute_list_opt T_LPAREN type_declarator T_RPAREN { 1259 $$ = $3; 1260 } 1261 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1262 $$ = add_array($1, $3.has_dim, $3.dim); 1263 } 1264 | type_direct_declarator param_list asm_or_symbolrename_opt { 1265 $$ = add_function(symbolrename($1, $3), $2); 1266 end_declaration_level(); 1267 block_level--; 1268 } 1269 | type_direct_declarator type_attribute 1270 ; 1271 1272 /* 1273 * The two distinct rules type_param_declarator and notype_param_declarator 1274 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1275 * always treated as a typename, not an argument name. For example, after 1276 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1277 * "f(int (double));", not "f(int a);". 1278 */ 1279 type_param_declarator: 1280 direct_param_declarator 1281 | pointer direct_param_declarator { 1282 $$ = add_pointer($2, $1); 1283 } 1284 ; 1285 1286 notype_param_declarator: 1287 direct_notype_param_declarator 1288 | pointer direct_notype_param_declarator { 1289 $$ = add_pointer($2, $1); 1290 } 1291 ; 1292 1293 direct_param_declarator: 1294 identifier type_attribute_list { 1295 $$ = declarator_name(getsym($1)); 1296 } 1297 | identifier { 1298 $$ = declarator_name(getsym($1)); 1299 } 1300 | T_LPAREN notype_param_declarator T_RPAREN { 1301 $$ = $2; 1302 } 1303 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1304 gcc_attribute_list_opt { 1305 $$ = add_array($1, $3.has_dim, $3.dim); 1306 } 1307 | direct_param_declarator param_list asm_or_symbolrename_opt { 1308 $$ = add_function(symbolrename($1, $3), $2); 1309 end_declaration_level(); 1310 block_level--; 1311 } 1312 ; 1313 1314 direct_notype_param_declarator: 1315 identifier { 1316 $$ = declarator_name(getsym($1)); 1317 } 1318 | T_LPAREN notype_param_declarator T_RPAREN { 1319 $$ = $2; 1320 } 1321 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1322 $$ = add_array($1, $3.has_dim, $3.dim); 1323 } 1324 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1325 $$ = add_function(symbolrename($1, $3), $2); 1326 end_declaration_level(); 1327 block_level--; 1328 } 1329 ; 1330 1331 param_list: 1332 id_list_lparen identifier_list T_RPAREN { 1333 $$ = $2; 1334 } 1335 | abstract_decl_param_list 1336 ; 1337 1338 id_list_lparen: 1339 T_LPAREN { 1340 block_level++; 1341 begin_declaration_level(DK_PROTO_ARG); 1342 } 1343 ; 1344 1345 array_size_opt: 1346 /* empty */ { 1347 $$.has_dim = false; 1348 $$.dim = 0; 1349 } 1350 | T_ASTERISK { 1351 /* since C99; variable length array of unspecified size */ 1352 $$.has_dim = false; /* TODO: maybe change to true */ 1353 $$.dim = 0; /* just as a placeholder */ 1354 } 1355 | array_size { 1356 $$.has_dim = true; 1357 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1358 } 1359 ; 1360 1361 array_size: 1362 type_qualifier_list_opt T_SCLASS constant_expr { 1363 /* C11 6.7.6.3p7 */ 1364 if ($2 != STATIC) 1365 yyerror("Bad attribute"); 1366 /* static array size is a C11 extension */ 1367 c11ism(343); 1368 $$ = $3; 1369 } 1370 | T_QUAL { 1371 /* C11 6.7.6.2 */ 1372 if ($1 != RESTRICT) 1373 yyerror("Bad attribute"); 1374 $$ = NULL; 1375 } 1376 | constant_expr 1377 ; 1378 1379 identifier_list: /* C99 6.7.5 */ 1380 T_NAME { 1381 $$ = old_style_function_name(getsym($1)); 1382 } 1383 | identifier_list T_COMMA T_NAME { 1384 $$ = lnklst($1, old_style_function_name(getsym($3))); 1385 } 1386 | identifier_list error 1387 ; 1388 1389 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1390 type_name: /* C99 6.7.6 */ 1391 { 1392 begin_declaration_level(DK_ABSTRACT); 1393 } abstract_declaration { 1394 end_declaration_level(); 1395 $$ = $2->s_type; 1396 } 1397 ; 1398 1399 abstract_declaration: /* specific to lint */ 1400 begin_type_qualifier_list end_type { 1401 $$ = declare_1_abstract(abstract_name()); 1402 } 1403 | begin_type_specifier_qualifier_list end_type { 1404 $$ = declare_1_abstract(abstract_name()); 1405 } 1406 | begin_type_qualifier_list end_type abstract_declarator { 1407 $$ = declare_1_abstract($3); 1408 } 1409 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1410 $$ = declare_1_abstract($3); 1411 } 1412 ; 1413 1414 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1415 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1416 abstract_declarator: 1417 pointer { 1418 $$ = add_pointer(abstract_name(), $1); 1419 } 1420 | direct_abstract_declarator 1421 | pointer direct_abstract_declarator { 1422 $$ = add_pointer($2, $1); 1423 } 1424 | type_attribute_list direct_abstract_declarator { 1425 $$ = $2; 1426 } 1427 | pointer type_attribute_list direct_abstract_declarator { 1428 $$ = add_pointer($3, $1); 1429 } 1430 ; 1431 1432 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1433 direct_abstract_declarator: 1434 /* TODO: sort rules according to C99 */ 1435 T_LPAREN abstract_declarator T_RPAREN { 1436 $$ = $2; 1437 } 1438 | T_LBRACK array_size_opt T_RBRACK { 1439 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1440 } 1441 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1442 $$ = add_array($1, $3.has_dim, $3.dim); 1443 } 1444 | abstract_decl_param_list asm_or_symbolrename_opt { 1445 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1446 end_declaration_level(); 1447 block_level--; 1448 } 1449 | direct_abstract_declarator abstract_decl_param_list 1450 asm_or_symbolrename_opt { 1451 $$ = add_function(symbolrename($1, $3), $2); 1452 end_declaration_level(); 1453 block_level--; 1454 } 1455 | direct_abstract_declarator type_attribute_list 1456 ; 1457 1458 abstract_decl_param_list: /* specific to lint */ 1459 abstract_decl_lparen T_RPAREN type_attribute_opt { 1460 $$ = NULL; 1461 } 1462 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1463 type_attribute_opt { 1464 dcs->d_proto = true; 1465 $$ = $2; 1466 } 1467 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1468 $$ = NULL; 1469 } 1470 ; 1471 1472 abstract_decl_lparen: /* specific to lint */ 1473 T_LPAREN { 1474 block_level++; 1475 begin_declaration_level(DK_PROTO_ARG); 1476 } 1477 ; 1478 1479 vararg_parameter_type_list: /* specific to lint */ 1480 parameter_type_list 1481 | parameter_type_list T_COMMA T_ELLIPSIS { 1482 dcs->d_vararg = true; 1483 $$ = $1; 1484 } 1485 | T_ELLIPSIS { 1486 /* TODO: C99 6.7.5 makes this an error as well. */ 1487 if (!allow_trad && !allow_c99) { 1488 /* ANSI C requires formal parameter before '...' */ 1489 error(84); 1490 } else if (allow_c90) { 1491 /* ANSI C requires formal parameter before '...' */ 1492 warning(84); 1493 } 1494 dcs->d_vararg = true; 1495 $$ = NULL; 1496 } 1497 ; 1498 1499 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1500 parameter_type_list: 1501 parameter_declaration 1502 | parameter_type_list T_COMMA parameter_declaration { 1503 $$ = lnklst($1, $3); 1504 } 1505 ; 1506 1507 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1508 parameter_declaration: 1509 begin_type_declmods end_type { 1510 /* ^^ There is no check for the missing type-specifier. */ 1511 $$ = declare_argument(abstract_name(), false); 1512 } 1513 | begin_type_declaration_specifiers end_type { 1514 $$ = declare_argument(abstract_name(), false); 1515 } 1516 | begin_type_declmods end_type notype_param_declarator { 1517 /* ^^ There is no check for the missing type-specifier. */ 1518 $$ = declare_argument($3, false); 1519 } 1520 /* 1521 * type_param_declarator is needed because of following conflict: 1522 * "typedef int a; f(int (a));" could be parsed as 1523 * "function with argument a of type int", or 1524 * "function with an abstract argument of type function". 1525 * This grammar realizes the second case. 1526 */ 1527 | begin_type_declaration_specifiers end_type type_param_declarator { 1528 $$ = declare_argument($3, false); 1529 } 1530 | begin_type_declmods end_type abstract_declarator { 1531 /* ^^ There is no check for the missing type-specifier. */ 1532 $$ = declare_argument($3, false); 1533 } 1534 | begin_type_declaration_specifiers end_type abstract_declarator { 1535 $$ = declare_argument($3, false); 1536 } 1537 ; 1538 1539 initializer: /* C99 6.7.8 "Initialization" */ 1540 assignment_expression { 1541 init_expr($1); 1542 } 1543 | init_lbrace init_rbrace { 1544 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1545 } 1546 | init_lbrace initializer_list comma_opt init_rbrace 1547 /* XXX: What is this error handling for? */ 1548 | error 1549 ; 1550 1551 initializer_list: /* C99 6.7.8 "Initialization" */ 1552 initializer_list_item 1553 | initializer_list T_COMMA initializer_list_item 1554 ; 1555 1556 initializer_list_item: /* helper */ 1557 designation initializer 1558 | initializer 1559 ; 1560 1561 designation: /* C99 6.7.8 "Initialization" */ 1562 begin_designation designator_list T_ASSIGN 1563 | identifier T_COLON { 1564 /* GCC style struct or union member name in initializer */ 1565 gnuism(315); 1566 begin_designation(); 1567 add_designator_member($1); 1568 } 1569 ; 1570 1571 begin_designation: /* lint-specific helper */ 1572 /* empty */ { 1573 begin_designation(); 1574 } 1575 ; 1576 1577 designator_list: /* C99 6.7.8 "Initialization" */ 1578 designator 1579 | designator_list designator 1580 ; 1581 1582 designator: /* C99 6.7.8 "Initialization" */ 1583 T_LBRACK range T_RBRACK { 1584 if (!allow_c99) 1585 /* array initializer with designators is a C99 ... */ 1586 warning(321); 1587 add_designator_subscript($2); 1588 } 1589 | T_POINT identifier { 1590 if (!allow_c99) 1591 /* struct or union member name in initializer is ... */ 1592 warning(313); 1593 add_designator_member($2); 1594 } 1595 ; 1596 1597 static_assert_declaration: 1598 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1599 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1600 ; 1601 1602 range: 1603 constant_expr { 1604 $$.lo = to_int_constant($1, true); 1605 $$.hi = $$.lo; 1606 } 1607 | constant_expr T_ELLIPSIS constant_expr { 1608 $$.lo = to_int_constant($1, true); 1609 $$.hi = to_int_constant($3, true); 1610 /* initialization with '[a...b]' is a GCC extension */ 1611 gnuism(340); 1612 } 1613 ; 1614 1615 init_lbrace: /* helper */ 1616 T_LBRACE { 1617 init_lbrace(); 1618 } 1619 ; 1620 1621 init_rbrace: /* helper */ 1622 T_RBRACE { 1623 init_rbrace(); 1624 } 1625 ; 1626 1627 asm_or_symbolrename_opt: /* GCC extensions */ 1628 /* empty */ { 1629 $$ = NULL; 1630 } 1631 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1632 freeyyv(&$3, T_STRING); 1633 $$ = NULL; 1634 } 1635 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1636 $$ = $3; 1637 } 1638 ; 1639 1640 statement: /* C99 6.8 */ 1641 expression_statement 1642 | non_expr_statement 1643 ; 1644 1645 non_expr_statement: /* helper for C99 6.8 */ 1646 gcc_attribute /* ((__fallthrough__)) */ T_SEMI 1647 | labeled_statement 1648 | compound_statement 1649 | selection_statement 1650 | iteration_statement 1651 | jump_statement { 1652 seen_fallthrough = false; 1653 } 1654 | asm_statement 1655 ; 1656 1657 labeled_statement: /* C99 6.8.1 */ 1658 label gcc_attribute_list_opt statement 1659 ; 1660 1661 label: 1662 T_NAME T_COLON { 1663 symtyp = FLABEL; 1664 named_label(getsym($1)); 1665 } 1666 | T_CASE constant_expr T_COLON { 1667 case_label($2); 1668 seen_fallthrough = true; 1669 } 1670 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1671 /* XXX: We don't fill all cases */ 1672 case_label($2); 1673 seen_fallthrough = true; 1674 } 1675 | T_DEFAULT T_COLON { 1676 default_label(); 1677 seen_fallthrough = true; 1678 } 1679 ; 1680 1681 compound_statement: /* C99 6.8.2 */ 1682 compound_statement_lbrace compound_statement_rbrace 1683 | compound_statement_lbrace block_item_list compound_statement_rbrace 1684 ; 1685 1686 compound_statement_lbrace: 1687 T_LBRACE { 1688 block_level++; 1689 mem_block_level++; 1690 begin_declaration_level(DK_AUTO); 1691 } 1692 ; 1693 1694 compound_statement_rbrace: 1695 T_RBRACE { 1696 end_declaration_level(); 1697 level_free_all(mem_block_level); 1698 mem_block_level--; 1699 block_level--; 1700 seen_fallthrough = false; 1701 } 1702 ; 1703 1704 block_item_list: /* C99 6.8.2 */ 1705 block_item 1706 | block_item_list block_item { 1707 if ($1 && !$2) 1708 /* declarations after statements is a C99 feature */ 1709 c99ism(327); 1710 $$ = $1 || $2; 1711 } 1712 ; 1713 1714 block_item: /* C99 6.8.2 */ 1715 declaration_or_error { 1716 $$ = false; 1717 restore_warning_flags(); 1718 } 1719 | statement { 1720 $$ = true; 1721 restore_warning_flags(); 1722 } 1723 ; 1724 1725 expression_statement: /* C99 6.8.3 */ 1726 expression T_SEMI { 1727 expr($1, false, false, false, false); 1728 seen_fallthrough = false; 1729 } 1730 | T_SEMI { 1731 check_statement_reachable(); 1732 seen_fallthrough = false; 1733 } 1734 ; 1735 1736 selection_statement: /* C99 6.8.4 */ 1737 if_without_else %prec T_THEN { 1738 save_warning_flags(); 1739 if2(); 1740 if3(false); 1741 } 1742 | if_without_else T_ELSE { 1743 save_warning_flags(); 1744 if2(); 1745 } statement { 1746 clear_warning_flags(); 1747 if3(true); 1748 } 1749 | if_without_else T_ELSE error { 1750 clear_warning_flags(); 1751 if3(false); 1752 } 1753 | switch_expr statement { 1754 clear_warning_flags(); 1755 switch2(); 1756 } 1757 | switch_expr error { 1758 clear_warning_flags(); 1759 switch2(); 1760 } 1761 ; 1762 1763 if_without_else: /* see C99 6.8.4 */ 1764 if_expr statement 1765 | if_expr error 1766 ; 1767 1768 if_expr: /* see C99 6.8.4 */ 1769 T_IF T_LPAREN expression T_RPAREN { 1770 if1($3); 1771 clear_warning_flags(); 1772 } 1773 ; 1774 1775 switch_expr: /* see C99 6.8.4 */ 1776 T_SWITCH T_LPAREN expression T_RPAREN { 1777 switch1($3); 1778 clear_warning_flags(); 1779 } 1780 ; 1781 1782 iteration_statement: /* C99 6.8.5 */ 1783 while_expr statement { 1784 clear_warning_flags(); 1785 while2(); 1786 } 1787 | while_expr error { 1788 clear_warning_flags(); 1789 while2(); 1790 } 1791 | do_statement do_while_expr { 1792 do2($2); 1793 seen_fallthrough = false; 1794 } 1795 | do error { 1796 clear_warning_flags(); 1797 do2(NULL); 1798 } 1799 | for_exprs statement { 1800 clear_warning_flags(); 1801 for2(); 1802 end_declaration_level(); 1803 block_level--; 1804 } 1805 | for_exprs error { 1806 clear_warning_flags(); 1807 for2(); 1808 end_declaration_level(); 1809 block_level--; 1810 } 1811 ; 1812 1813 while_expr: /* see C99 6.8.5 */ 1814 T_WHILE T_LPAREN expression T_RPAREN { 1815 while1($3); 1816 clear_warning_flags(); 1817 } 1818 ; 1819 1820 do_statement: /* see C99 6.8.5 */ 1821 do statement { 1822 clear_warning_flags(); 1823 } 1824 ; 1825 1826 do: /* see C99 6.8.5 */ 1827 T_DO { 1828 do1(); 1829 } 1830 ; 1831 1832 do_while_expr: /* see C99 6.8.5 */ 1833 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1834 $$ = $3; 1835 } 1836 ; 1837 1838 for_start: /* see C99 6.8.5 */ 1839 T_FOR T_LPAREN { 1840 begin_declaration_level(DK_AUTO); 1841 block_level++; 1842 } 1843 ; 1844 1845 for_exprs: /* see C99 6.8.5 */ 1846 for_start 1847 begin_type_declaration_specifiers end_type 1848 notype_init_declarators T_SEMI 1849 expression_opt T_SEMI 1850 expression_opt T_RPAREN { 1851 /* variable declaration in for loop */ 1852 c99ism(325); 1853 for1(NULL, $6, $8); 1854 clear_warning_flags(); 1855 } 1856 | for_start 1857 expression_opt T_SEMI 1858 expression_opt T_SEMI 1859 expression_opt T_RPAREN { 1860 for1($2, $4, $6); 1861 clear_warning_flags(); 1862 } 1863 ; 1864 1865 jump_statement: /* C99 6.8.6 */ 1866 goto identifier T_SEMI { 1867 do_goto(getsym($2)); 1868 } 1869 | goto error T_SEMI { 1870 symtyp = FVFT; 1871 } 1872 | T_CONTINUE T_SEMI { 1873 do_continue(); 1874 } 1875 | T_BREAK T_SEMI { 1876 do_break(); 1877 } 1878 | T_RETURN sys T_SEMI { 1879 do_return($2, NULL); 1880 } 1881 | T_RETURN sys expression T_SEMI { 1882 do_return($2, $3); 1883 } 1884 ; 1885 1886 goto: /* see C99 6.8.6 */ 1887 T_GOTO { 1888 symtyp = FLABEL; 1889 } 1890 ; 1891 1892 asm_statement: /* GCC extension */ 1893 T_ASM T_LPAREN read_until_rparen T_SEMI { 1894 setasm(); 1895 } 1896 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1897 setasm(); 1898 } 1899 | T_ASM error 1900 ; 1901 1902 read_until_rparen: /* helper for 'asm_statement' */ 1903 /* empty */ { 1904 read_until_rparen(); 1905 } 1906 ; 1907 1908 translation_unit: /* C99 6.9 */ 1909 external_declaration 1910 | translation_unit external_declaration 1911 ; 1912 1913 external_declaration: /* C99 6.9 */ 1914 function_definition { 1915 global_clean_up_decl(false); 1916 clear_warning_flags(); 1917 } 1918 | top_level_declaration { 1919 global_clean_up_decl(false); 1920 clear_warning_flags(); 1921 } 1922 | asm_statement /* GCC extension */ 1923 | T_SEMI { /* GCC extension */ 1924 /* 1925 * TODO: Only allow this in GCC mode, not in plain C99. 1926 * This is one of the top 10 warnings in the NetBSD build. 1927 */ 1928 if (!allow_trad && !allow_c99) { 1929 /* empty declaration */ 1930 error(0); 1931 } else if (allow_c90) { 1932 /* empty declaration */ 1933 warning(0); 1934 } 1935 } 1936 ; 1937 1938 /* 1939 * On the top level, lint allows several forms of declarations that it doesn't 1940 * allow in functions. For example, a single ';' is an empty declaration and 1941 * is supported by some compilers, but in a function it would be an empty 1942 * statement, not a declaration. This makes a difference in C90 mode, where 1943 * a statement must not be followed by a declaration. 1944 * 1945 * See 'declaration' for all other declarations. 1946 */ 1947 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1948 begin_type end_type notype_init_declarators T_SEMI { 1949 /* TODO: Make this an error in C99 mode as well. */ 1950 if (!allow_trad && !allow_c99) { 1951 /* old style declaration; add 'int' */ 1952 error(1); 1953 } else if (allow_c90) { 1954 /* old style declaration; add 'int' */ 1955 warning(1); 1956 } 1957 } 1958 | declaration 1959 | error T_SEMI { 1960 global_clean_up(); 1961 } 1962 | error T_RBRACE { 1963 global_clean_up(); 1964 } 1965 ; 1966 1967 function_definition: /* C99 6.9.1 */ 1968 func_declarator { 1969 if ($1->s_type->t_tspec != FUNC) { 1970 /* syntax error '%s' */ 1971 error(249, yytext); 1972 YYERROR; 1973 } 1974 if ($1->s_type->t_typedef) { 1975 /* ()-less function definition */ 1976 error(64); 1977 YYERROR; 1978 } 1979 funcdef($1); 1980 block_level++; 1981 begin_declaration_level(DK_OLD_STYLE_ARG); 1982 if (lwarn == LWARN_NONE) 1983 $1->s_used = true; 1984 } arg_declaration_list_opt { 1985 end_declaration_level(); 1986 block_level--; 1987 check_func_lint_directives(); 1988 check_func_old_style_arguments(); 1989 begin_control_statement(CS_FUNCTION_BODY); 1990 } compound_statement { 1991 funcend(); 1992 end_control_statement(CS_FUNCTION_BODY); 1993 } 1994 ; 1995 1996 func_declarator: 1997 begin_type end_type notype_declarator { 1998 if (!allow_trad) { 1999 /* old style declaration; add 'int' */ 2000 error(1); 2001 } 2002 $$ = $3; 2003 } 2004 | begin_type_declmods end_type notype_declarator { 2005 if (!allow_trad) { 2006 /* old style declaration; add 'int' */ 2007 error(1); 2008 } 2009 $$ = $3; 2010 } 2011 | begin_type_declaration_specifiers end_type type_declarator { 2012 $$ = $3; 2013 } 2014 ; 2015 2016 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 2017 /* empty */ 2018 | arg_declaration_list 2019 ; 2020 2021 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2022 arg_declaration 2023 | arg_declaration_list arg_declaration 2024 /* XXX or better "arg_declaration error" ? */ 2025 | error 2026 ; 2027 2028 /* 2029 * "arg_declaration" is separated from "declaration" because it 2030 * needs other error handling. 2031 */ 2032 arg_declaration: 2033 begin_type_declmods end_type T_SEMI { 2034 /* empty declaration */ 2035 warning(2); 2036 } 2037 | begin_type_declmods end_type notype_init_declarators T_SEMI 2038 | begin_type_declaration_specifiers end_type T_SEMI { 2039 if (!dcs->d_nonempty_decl) { 2040 /* empty declaration */ 2041 warning(2); 2042 } else { 2043 /* '%s' declared in argument declaration list */ 2044 warning(3, type_name(dcs->d_type)); 2045 } 2046 } 2047 | begin_type_declaration_specifiers end_type 2048 type_init_declarators T_SEMI { 2049 if (dcs->d_nonempty_decl) { 2050 /* '%s' declared in argument declaration list */ 2051 warning(3, type_name(dcs->d_type)); 2052 } 2053 } 2054 | begin_type_declmods error 2055 | begin_type_declaration_specifiers error 2056 ; 2057 2058 gcc_attribute_list_opt: 2059 /* empty */ 2060 | gcc_attribute_list 2061 ; 2062 2063 gcc_attribute_list: 2064 gcc_attribute 2065 | gcc_attribute_list gcc_attribute 2066 ; 2067 2068 gcc_attribute: 2069 T_ATTRIBUTE T_LPAREN T_LPAREN { 2070 in_gcc_attribute = true; 2071 } gcc_attribute_spec_list { 2072 in_gcc_attribute = false; 2073 } T_RPAREN T_RPAREN 2074 ; 2075 2076 gcc_attribute_spec_list: 2077 gcc_attribute_spec 2078 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2079 ; 2080 2081 gcc_attribute_spec: 2082 /* empty */ 2083 | T_AT_ALWAYS_INLINE 2084 | T_AT_ALIAS T_LPAREN string T_RPAREN 2085 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2086 | T_AT_ALIGNED 2087 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2088 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2089 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2090 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2091 | T_AT_COLD 2092 | T_AT_COMMON 2093 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2094 | T_AT_CONSTRUCTOR 2095 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2096 | T_AT_DEPRECATED 2097 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2098 | T_AT_DESTRUCTOR 2099 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2100 | T_AT_FALLTHROUGH { 2101 fallthru(1); 2102 } 2103 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2104 constant_expr T_COMMA constant_expr T_RPAREN 2105 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2106 | T_AT_GNU_INLINE 2107 | T_AT_HOT 2108 | T_AT_MALLOC 2109 | T_AT_MAY_ALIAS 2110 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2111 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2112 | T_AT_NO_SANITIZE_THREAD 2113 | T_AT_NOINLINE 2114 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2115 | T_AT_NONNULL 2116 | T_AT_NONSTRING 2117 | T_AT_NORETURN 2118 | T_AT_NOTHROW 2119 | T_AT_NO_INSTRUMENT_FUNCTION 2120 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2121 | T_AT_OPTNONE 2122 | T_AT_PACKED { 2123 addpacked(); 2124 } 2125 | T_AT_PCS T_LPAREN string T_RPAREN 2126 | T_AT_PURE 2127 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2128 | T_AT_RETURNS_NONNULL 2129 | T_AT_RETURNS_TWICE 2130 | T_AT_SECTION T_LPAREN string T_RPAREN 2131 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2132 | T_AT_SENTINEL 2133 | T_AT_TARGET T_LPAREN string T_RPAREN 2134 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2135 | T_AT_TUNION 2136 | T_AT_UNUSED { 2137 add_attr_used(); 2138 } 2139 | T_AT_USED { 2140 add_attr_used(); 2141 } 2142 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2143 | T_AT_WARN_UNUSED_RESULT 2144 | T_AT_WEAK 2145 | T_QUAL { 2146 if ($1 != CONST) 2147 yyerror("Bad attribute"); 2148 } 2149 ; 2150 2151 gcc_attribute_bounded: 2152 T_AT_MINBYTES 2153 | T_AT_STRING 2154 | T_AT_BUFFER 2155 ; 2156 2157 gcc_attribute_format: 2158 T_AT_FORMAT_GNU_PRINTF 2159 | T_AT_FORMAT_PRINTF 2160 | T_AT_FORMAT_SCANF 2161 | T_AT_FORMAT_STRFMON 2162 | T_AT_FORMAT_STRFTIME 2163 | T_AT_FORMAT_SYSLOG 2164 ; 2165 2166 sys: 2167 /* empty */ { 2168 $$ = in_system_header; 2169 } 2170 ; 2171 2172 %% 2173 2174 /* ARGSUSED */ 2175 int 2176 yyerror(const char *msg) 2177 { 2178 /* syntax error '%s' */ 2179 error(249, yytext); 2180 if (++sytxerr >= 5) 2181 norecover(); 2182 return 0; 2183 } 2184 2185 #if YYDEBUG && (YYBYACC || YYBISON) 2186 static const char * 2187 cgram_to_string(int token, YYSTYPE val) 2188 { 2189 2190 switch (token) { 2191 case T_INCDEC: 2192 case T_MULTIPLICATIVE: 2193 case T_ADDITIVE: 2194 case T_SHIFT: 2195 case T_RELATIONAL: 2196 case T_EQUALITY: 2197 case T_OPASSIGN: 2198 return modtab[val.y_op].m_name; 2199 case T_SCLASS: 2200 return scl_name(val.y_scl); 2201 case T_TYPE: 2202 case T_STRUCT_OR_UNION: 2203 return tspec_name(val.y_tspec); 2204 case T_QUAL: 2205 return tqual_name(val.y_tqual); 2206 case T_NAME: 2207 return val.y_name->sb_name; 2208 default: 2209 return "<none>"; 2210 } 2211 } 2212 #endif 2213 2214 #if YYDEBUG && YYBISON 2215 static inline void 2216 cgram_print(FILE *output, int token, YYSTYPE val) 2217 { 2218 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2219 } 2220 #endif 2221 2222 static void 2223 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2224 { 2225 declare(decl, initflg, renaming); 2226 if (renaming != NULL) 2227 freeyyv(&renaming, T_NAME); 2228 } 2229 2230 /* 2231 * Discard all input tokens up to and including the next 2232 * unmatched right paren 2233 */ 2234 static void 2235 read_until_rparen(void) 2236 { 2237 int level; 2238 2239 if (yychar < 0) 2240 yychar = yylex(); 2241 freeyyv(&yylval, yychar); 2242 2243 level = 1; 2244 while (yychar != T_RPAREN || --level > 0) { 2245 if (yychar == T_LPAREN) { 2246 level++; 2247 } else if (yychar <= 0) { 2248 break; 2249 } 2250 freeyyv(&yylval, yychar = yylex()); 2251 } 2252 2253 yyclearin; 2254 } 2255 2256 static sym_t * 2257 symbolrename(sym_t *s, sbuf_t *sb) 2258 { 2259 if (sb != NULL) 2260 s->s_rename = sb->sb_name; 2261 return s; 2262 } 2263
Indexes created Fri Oct 03 02:09:57 GMT 2025