cgram.y revision 1.405
1 %{ 2 /* $NetBSD: cgram.y,v 1.405 2022/04/29 07:02:40 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 1.405 2022/04/29 07:02:40 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 defined(YYDEBUG) && (defined(YYBYACC) || defined(YYBISON)) 121 #define YYSTYPE_TOSTRING cgram_to_string 122 #endif 123 #if defined(YYDEBUG) && defined(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 defined(YYDEBUG) && defined(YYBISON) 367 static inline void cgram_print(FILE *, int, YYSTYPE); 368 #endif 369 %} 370 371 %% 372 373 program: 374 /* empty */ { 375 if (sflag) { 376 /* empty translation unit */ 377 error(272); 378 } else if (!tflag) { 379 /* empty translation unit */ 380 warning(272); 381 } 382 } 383 | translation_unit 384 ; 385 386 identifier_sym: /* helper for struct/union/enum */ 387 identifier { 388 $$ = getsym($1); 389 } 390 ; 391 392 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 393 identifier: 394 T_NAME { 395 debug_step("cgram: name '%s'", $1->sb_name); 396 $$ = $1; 397 } 398 | T_TYPENAME { 399 debug_step("cgram: typename '%s'", $1->sb_name); 400 $$ = $1; 401 } 402 ; 403 404 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 405 string: 406 T_STRING 407 | string T_STRING { 408 if (tflag) { 409 /* concatenated strings are illegal in traditional C */ 410 warning(219); 411 } 412 $$ = cat_strings($1, $2); 413 } 414 ; 415 416 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 417 primary_expression: 418 T_NAME { 419 bool sys_name, sys_next; 420 sys_name = in_system_header; 421 if (yychar < 0) 422 yychar = yylex(); 423 sys_next = in_system_header; 424 in_system_header = sys_name; 425 $$ = build_name(getsym($1), yychar == T_LPAREN); 426 in_system_header = sys_next; 427 } 428 | T_CON { 429 $$ = build_constant(gettyp($1->v_tspec), $1); 430 } 431 | string { 432 $$ = build_string($1); 433 } 434 | T_LPAREN expression T_RPAREN { 435 if ($2 != NULL) 436 $2->tn_parenthesized = true; 437 $$ = $2; 438 } 439 | generic_selection 440 /* GCC primary-expression, see c_parser_postfix_expression */ 441 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 442 symtyp = FMEMBER; 443 $$ = build_offsetof($3, getsym($5)); 444 } 445 ; 446 447 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 448 generic_selection: 449 T_GENERIC T_LPAREN assignment_expression T_COMMA 450 generic_assoc_list T_RPAREN { 451 /* generic selection requires C11 or later */ 452 c11ism(345); 453 $$ = build_generic_selection($3, $5); 454 } 455 ; 456 457 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 458 generic_assoc_list: 459 generic_association 460 | generic_assoc_list T_COMMA generic_association { 461 $3->ga_prev = $1; 462 $$ = $3; 463 } 464 ; 465 466 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 467 generic_association: 468 type_name T_COLON assignment_expression { 469 $$ = block_zero_alloc(sizeof(*$$)); 470 $$->ga_arg = $1; 471 $$->ga_result = $3; 472 } 473 | T_DEFAULT T_COLON assignment_expression { 474 $$ = block_zero_alloc(sizeof(*$$)); 475 $$->ga_arg = NULL; 476 $$->ga_result = $3; 477 } 478 ; 479 480 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 481 postfix_expression: 482 primary_expression 483 | postfix_expression T_LBRACK sys expression T_RBRACK { 484 $$ = build_unary(INDIR, $3, build_binary($1, PLUS, $3, $4)); 485 } 486 | postfix_expression T_LPAREN sys T_RPAREN { 487 $$ = build_function_call($1, $3, NULL); 488 } 489 | postfix_expression T_LPAREN sys argument_expression_list T_RPAREN { 490 $$ = build_function_call($1, $3, $4); 491 } 492 | postfix_expression point_or_arrow sys T_NAME { 493 $$ = build_member_access($1, $2, $3, $4); 494 } 495 | postfix_expression T_INCDEC sys { 496 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $3, $1); 497 } 498 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 499 sym_t *tmp = mktempsym($2); 500 begin_initialization(tmp); 501 cgram_declare(tmp, true, NULL); 502 } init_lbrace initializer_list comma_opt init_rbrace { 503 if (!Sflag) 504 /* compound literals are a C99/GCC extension */ 505 gnuism(319); 506 $$ = build_name(*current_initsym(), false); 507 end_initialization(); 508 } 509 | T_LPAREN compound_statement_lbrace { 510 begin_statement_expr(); 511 } gcc_statement_expr_list { 512 do_statement_expr($4); 513 } compound_statement_rbrace T_RPAREN { 514 $$ = end_statement_expr(); 515 } 516 ; 517 518 comma_opt: /* helper for 'postfix_expression' */ 519 /* empty */ 520 | T_COMMA 521 ; 522 523 /* 524 * The inner part of a GCC statement-expression of the form ({ ... }). 525 * 526 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 527 */ 528 gcc_statement_expr_list: 529 gcc_statement_expr_item 530 | gcc_statement_expr_list gcc_statement_expr_item { 531 $$ = $2; 532 } 533 ; 534 535 gcc_statement_expr_item: 536 declaration_or_error { 537 clear_warning_flags(); 538 $$ = NULL; 539 } 540 | non_expr_statement { 541 $$ = expr_alloc_tnode(); 542 $$->tn_type = gettyp(VOID); 543 } 544 | expression T_SEMI { 545 if ($1 == NULL) { /* in case of syntax errors */ 546 $$ = expr_alloc_tnode(); 547 $$->tn_type = gettyp(VOID); 548 } else { 549 /* XXX: do that only on the last name */ 550 if ($1->tn_op == NAME) 551 $1->tn_sym->s_used = true; 552 expr($1, false, false, false, false); 553 seen_fallthrough = false; 554 $$ = $1; 555 } 556 } 557 ; 558 559 point_or_arrow: /* helper for 'postfix_expression' */ 560 T_POINT { 561 symtyp = FMEMBER; 562 $$ = POINT; 563 } 564 | T_ARROW { 565 symtyp = FMEMBER; 566 $$ = ARROW; 567 } 568 ; 569 570 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 571 argument_expression_list: 572 assignment_expression { 573 $$ = build_function_argument(NULL, $1); 574 } 575 | argument_expression_list T_COMMA assignment_expression { 576 $$ = build_function_argument($1, $3); 577 } 578 ; 579 580 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 581 unary_expression: 582 postfix_expression 583 | T_INCDEC sys unary_expression { 584 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2, $3); 585 } 586 | T_AMPER sys cast_expression { 587 $$ = build_unary(ADDR, $2, $3); 588 } 589 | T_ASTERISK sys cast_expression { 590 $$ = build_unary(INDIR, $2, $3); 591 } 592 | T_ADDITIVE sys cast_expression { 593 if (tflag && $1 == PLUS) { 594 /* unary + is illegal in traditional C */ 595 warning(100); 596 } 597 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2, $3); 598 } 599 | T_COMPLEMENT sys cast_expression { 600 $$ = build_unary(COMPL, $2, $3); 601 } 602 | T_LOGNOT sys cast_expression { 603 $$ = build_unary(NOT, $2, $3); 604 } 605 | T_REAL sys cast_expression { /* GCC c_parser_unary_expression */ 606 $$ = build_unary(REAL, $2, $3); 607 } 608 | T_IMAG sys cast_expression { /* GCC c_parser_unary_expression */ 609 $$ = build_unary(IMAG, $2, $3); 610 } 611 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 612 $$ = $2; 613 } 614 | T_SIZEOF unary_expression { 615 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 616 if ($$ != NULL) 617 check_expr_misc($2, 618 false, false, false, false, false, true); 619 } 620 | T_SIZEOF T_LPAREN type_name T_RPAREN { 621 $$ = build_sizeof($3); 622 } 623 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 624 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 625 /* TODO: c11ism */ 626 $$ = build_alignof($3); 627 } 628 ; 629 630 /* The rule 'unary_operator' is inlined into unary_expression. */ 631 632 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 633 cast_expression: 634 unary_expression 635 | T_LPAREN type_name T_RPAREN cast_expression { 636 $$ = cast($4, $2); 637 } 638 ; 639 640 expression_opt: 641 /* empty */ { 642 $$ = NULL; 643 } 644 | expression 645 ; 646 647 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 648 /* 'conditional_expression' also implements 'additive_expression'. */ 649 /* 'conditional_expression' also implements 'shift_expression'. */ 650 /* 'conditional_expression' also implements 'relational_expression'. */ 651 /* 'conditional_expression' also implements 'equality_expression'. */ 652 /* 'conditional_expression' also implements 'AND_expression'. */ 653 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 654 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 655 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 656 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 657 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 658 conditional_expression: 659 cast_expression 660 | conditional_expression T_ASTERISK sys conditional_expression { 661 $$ = build_binary($1, MULT, $3, $4); 662 } 663 | conditional_expression T_MULTIPLICATIVE sys conditional_expression { 664 $$ = build_binary($1, $2, $3, $4); 665 } 666 | conditional_expression T_ADDITIVE sys conditional_expression { 667 $$ = build_binary($1, $2, $3, $4); 668 } 669 | conditional_expression T_SHIFT sys conditional_expression { 670 $$ = build_binary($1, $2, $3, $4); 671 } 672 | conditional_expression T_RELATIONAL sys conditional_expression { 673 $$ = build_binary($1, $2, $3, $4); 674 } 675 | conditional_expression T_EQUALITY sys conditional_expression { 676 $$ = build_binary($1, $2, $3, $4); 677 } 678 | conditional_expression T_AMPER sys conditional_expression { 679 $$ = build_binary($1, BITAND, $3, $4); 680 } 681 | conditional_expression T_BITXOR sys conditional_expression { 682 $$ = build_binary($1, BITXOR, $3, $4); 683 } 684 | conditional_expression T_BITOR sys conditional_expression { 685 $$ = build_binary($1, BITOR, $3, $4); 686 } 687 | conditional_expression T_LOGAND sys conditional_expression { 688 $$ = build_binary($1, LOGAND, $3, $4); 689 } 690 | conditional_expression T_LOGOR sys conditional_expression { 691 $$ = build_binary($1, LOGOR, $3, $4); 692 } 693 | conditional_expression T_QUEST sys 694 expression T_COLON sys conditional_expression { 695 $$ = build_binary($1, QUEST, $3, 696 build_binary($4, COLON, $6, $7)); 697 } 698 ; 699 700 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 701 assignment_expression: 702 conditional_expression 703 | unary_expression T_ASSIGN sys assignment_expression { 704 $$ = build_binary($1, ASSIGN, $3, $4); 705 } 706 | unary_expression T_OPASSIGN sys assignment_expression { 707 $$ = build_binary($1, $2, $3, $4); 708 } 709 ; 710 711 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 712 expression: 713 assignment_expression 714 | expression T_COMMA sys assignment_expression { 715 $$ = build_binary($1, COMMA, $3, $4); 716 } 717 ; 718 719 constant_expr_list_opt: /* helper for gcc_attribute */ 720 /* empty */ 721 | constant_expr_list 722 ; 723 724 constant_expr_list: /* helper for gcc_attribute */ 725 constant_expr 726 | constant_expr_list T_COMMA constant_expr 727 ; 728 729 constant_expr: /* C99 6.6 */ 730 conditional_expression 731 ; 732 733 declaration_or_error: 734 declaration 735 | error T_SEMI 736 ; 737 738 declaration: /* C99 6.7 */ 739 begin_type_declmods end_type T_SEMI { 740 if (dcs->d_scl == TYPEDEF) { 741 /* typedef declares no type name */ 742 warning(72); 743 } else { 744 /* empty declaration */ 745 warning(2); 746 } 747 } 748 | begin_type_declmods end_type notype_init_declarators T_SEMI { 749 if (dcs->d_scl == TYPEDEF) { 750 /* syntax error '%s' */ 751 error(249, "missing base type for typedef"); 752 } else { 753 /* old style declaration; add 'int' */ 754 error(1); 755 } 756 } 757 | begin_type_declaration_specifiers end_type T_SEMI { 758 if (dcs->d_scl == TYPEDEF) { 759 /* typedef declares no type name */ 760 warning(72); 761 } else if (!dcs->d_nonempty_decl) { 762 /* empty declaration */ 763 warning(2); 764 } 765 } 766 | begin_type_declaration_specifiers end_type 767 type_init_declarators T_SEMI 768 | static_assert_declaration 769 ; 770 771 begin_type_declaration_specifiers: /* see C99 6.7 */ 772 begin_type_typespec { 773 add_type($1); 774 } 775 | begin_type_declmods type_specifier { 776 add_type($2); 777 } 778 | type_attribute begin_type_declaration_specifiers 779 | begin_type_declaration_specifiers declmod 780 | begin_type_declaration_specifiers notype_type_specifier { 781 add_type($2); 782 } 783 ; 784 785 begin_type_declmods: /* see C99 6.7 */ 786 begin_type T_QUAL { 787 add_qualifier($2); 788 } 789 | begin_type T_SCLASS { 790 add_storage_class($2); 791 } 792 | begin_type_declmods declmod 793 ; 794 795 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 796 begin_type_specifier_qualifier_list_postfix 797 | type_attribute_list begin_type_specifier_qualifier_list_postfix 798 ; 799 800 begin_type_specifier_qualifier_list_postfix: 801 begin_type_typespec { 802 add_type($1); 803 } 804 | begin_type_qualifier_list type_specifier { 805 add_type($2); 806 } 807 | begin_type_specifier_qualifier_list_postfix T_QUAL { 808 add_qualifier($2); 809 } 810 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 811 add_type($2); 812 } 813 | begin_type_specifier_qualifier_list_postfix type_attribute 814 ; 815 816 begin_type_typespec: 817 begin_type notype_type_specifier { 818 $$ = $2; 819 } 820 | T_TYPENAME begin_type { 821 $$ = getsym($1)->s_type; 822 } 823 ; 824 825 begin_type_qualifier_list: 826 begin_type T_QUAL { 827 add_qualifier($2); 828 } 829 | begin_type_qualifier_list T_QUAL { 830 add_qualifier($2); 831 } 832 ; 833 834 declmod: 835 T_QUAL { 836 add_qualifier($1); 837 } 838 | T_SCLASS { 839 add_storage_class($1); 840 } 841 | type_attribute_list 842 ; 843 844 type_attribute_list_opt: 845 /* empty */ 846 | type_attribute_list 847 ; 848 849 type_attribute_list: 850 type_attribute 851 | type_attribute_list type_attribute 852 ; 853 854 type_attribute_opt: 855 /* empty */ 856 | type_attribute 857 ; 858 859 type_attribute: /* See C11 6.7 declaration-specifiers */ 860 gcc_attribute 861 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 862 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 863 | T_PACKED { 864 addpacked(); 865 } 866 | T_NORETURN 867 ; 868 869 begin_type: 870 /* empty */ { 871 begin_type(); 872 } 873 ; 874 875 end_type: 876 /* empty */ { 877 end_type(); 878 } 879 ; 880 881 type_specifier: /* C99 6.7.2 */ 882 notype_type_specifier 883 | T_TYPENAME { 884 $$ = getsym($1)->s_type; 885 } 886 ; 887 888 notype_type_specifier: /* see C99 6.7.2 */ 889 T_TYPE { 890 $$ = gettyp($1); 891 } 892 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 893 $$ = block_dup_type($3->tn_type); 894 $$->t_typeof = true; 895 } 896 | struct_or_union_specifier { 897 end_declaration_level(); 898 $$ = $1; 899 } 900 | enum_specifier { 901 end_declaration_level(); 902 $$ = $1; 903 } 904 ; 905 906 struct_or_union_specifier: /* C99 6.7.2.1 */ 907 struct_or_union identifier_sym { 908 /* 909 * STDC requires that "struct a;" always introduces 910 * a new tag if "a" is not declared at current level 911 * 912 * yychar is valid because otherwise the parser would not 913 * have been able to decide if it must shift or reduce 914 */ 915 $$ = mktag($2, $1, false, yychar == T_SEMI); 916 } 917 | struct_or_union identifier_sym { 918 dcs->d_tagtyp = mktag($2, $1, true, false); 919 } braced_struct_declaration_list { 920 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 921 } 922 | struct_or_union { 923 dcs->d_tagtyp = mktag(NULL, $1, true, false); 924 } braced_struct_declaration_list { 925 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 926 } 927 | struct_or_union error { 928 symtyp = FVFT; 929 $$ = gettyp(INT); 930 } 931 ; 932 933 struct_or_union: /* C99 6.7.2.1 */ 934 T_STRUCT_OR_UNION { 935 symtyp = FTAG; 936 begin_declaration_level($1 == STRUCT ? DK_MOS : DK_MOU); 937 dcs->d_offset_in_bits = 0; 938 dcs->d_sou_align_in_bits = CHAR_SIZE; 939 $$ = $1; 940 } 941 | struct_or_union type_attribute 942 ; 943 944 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 945 struct_declaration_lbrace struct_declaration_list_with_rbrace { 946 $$ = $2; 947 } 948 ; 949 950 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 951 T_LBRACE { 952 symtyp = FVFT; 953 } 954 ; 955 956 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 957 struct_declaration_list T_RBRACE 958 | T_RBRACE { 959 /* XXX: This is not allowed by any C standard. */ 960 $$ = NULL; 961 } 962 ; 963 964 struct_declaration_list: /* C99 6.7.2.1 */ 965 struct_declaration 966 | struct_declaration_list struct_declaration { 967 $$ = lnklst($1, $2); 968 } 969 ; 970 971 struct_declaration: /* C99 6.7.2.1 */ 972 begin_type_qualifier_list end_type { 973 /* ^^ There is no check for the missing type-specifier. */ 974 /* too late, i know, but getsym() compensates it */ 975 symtyp = FMEMBER; 976 } notype_struct_declarators type_attribute_opt T_SEMI { 977 symtyp = FVFT; 978 $$ = $4; 979 } 980 | begin_type_specifier_qualifier_list end_type { 981 symtyp = FMEMBER; 982 } type_struct_declarators type_attribute_opt T_SEMI { 983 symtyp = FVFT; 984 $$ = $4; 985 } 986 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 987 /* syntax error '%s' */ 988 error(249, "member without type"); 989 $$ = NULL; 990 } 991 | begin_type_specifier_qualifier_list end_type type_attribute_opt 992 T_SEMI { 993 symtyp = FVFT; 994 if (!allow_c11 && !allow_gcc) 995 /* anonymous struct/union members is a C11 feature */ 996 warning(49); 997 if (is_struct_or_union(dcs->d_type->t_tspec)) { 998 $$ = dcs->d_type->t_str->sou_first_member; 999 /* add all the members of the anonymous struct/union */ 1000 anonymize($$); 1001 } else { 1002 /* syntax error '%s' */ 1003 error(249, "unnamed member"); 1004 $$ = NULL; 1005 } 1006 } 1007 | static_assert_declaration { 1008 $$ = NULL; 1009 } 1010 | error T_SEMI { 1011 symtyp = FVFT; 1012 $$ = NULL; 1013 } 1014 ; 1015 1016 notype_struct_declarators: 1017 notype_struct_declarator { 1018 $$ = declarator_1_struct_union($1); 1019 } 1020 | notype_struct_declarators { 1021 symtyp = FMEMBER; 1022 } T_COMMA type_struct_declarator { 1023 $$ = lnklst($1, declarator_1_struct_union($4)); 1024 } 1025 ; 1026 1027 type_struct_declarators: 1028 type_struct_declarator { 1029 $$ = declarator_1_struct_union($1); 1030 } 1031 | type_struct_declarators { 1032 symtyp = FMEMBER; 1033 } T_COMMA type_struct_declarator { 1034 $$ = lnklst($1, declarator_1_struct_union($4)); 1035 } 1036 ; 1037 1038 notype_struct_declarator: 1039 notype_declarator 1040 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1041 $$ = bitfield($1, to_int_constant($3, true)); 1042 } 1043 | { 1044 symtyp = FVFT; 1045 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1046 $$ = bitfield(NULL, to_int_constant($3, true)); 1047 } 1048 ; 1049 1050 type_struct_declarator: 1051 type_declarator 1052 | type_declarator T_COLON constant_expr { 1053 $$ = bitfield($1, to_int_constant($3, true)); 1054 } 1055 | { 1056 symtyp = FVFT; 1057 } T_COLON constant_expr { 1058 $$ = bitfield(NULL, to_int_constant($3, true)); 1059 } 1060 ; 1061 1062 /* K&R ---, C90 6.5.2.2, C99 6.7.2.2, C11 6.7.2.2 */ 1063 enum_specifier: /* C99 6.7.2.2 */ 1064 enum gcc_attribute_list_opt identifier_sym { 1065 $$ = mktag($3, ENUM, false, false); 1066 } 1067 | enum gcc_attribute_list_opt identifier_sym { 1068 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1069 } enum_declaration /*gcc_attribute_list_opt*/ { 1070 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1071 } 1072 | enum gcc_attribute_list_opt { 1073 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1074 } enum_declaration /*gcc_attribute_list_opt*/ { 1075 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1076 } 1077 | enum error { 1078 symtyp = FVFT; 1079 $$ = gettyp(INT); 1080 } 1081 ; 1082 1083 enum: /* helper for C99 6.7.2.2 */ 1084 T_ENUM { 1085 symtyp = FTAG; 1086 begin_declaration_level(DK_ENUM_CONST); 1087 } 1088 ; 1089 1090 enum_declaration: /* helper for C99 6.7.2.2 */ 1091 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1092 $$ = $2; 1093 } 1094 ; 1095 1096 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1097 T_LBRACE { 1098 symtyp = FVFT; 1099 enumval = 0; 1100 } 1101 ; 1102 1103 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1104 enumerator_list 1105 | enumerator_list T_COMMA { 1106 if (Sflag) { 1107 /* C99 6.7.2.2p1 allows trailing ',' */ 1108 } else if (sflag) { 1109 /* trailing ',' prohibited in enum declaration */ 1110 error(54); 1111 } else { 1112 /* trailing ',' prohibited in enum declaration */ 1113 c99ism(54); 1114 } 1115 $$ = $1; 1116 } 1117 ; 1118 1119 enumerator_list: /* C99 6.7.2.2 */ 1120 enumerator 1121 | enumerator_list T_COMMA enumerator { 1122 $$ = lnklst($1, $3); 1123 } 1124 | error { 1125 $$ = NULL; 1126 } 1127 ; 1128 1129 enumerator: /* C99 6.7.2.2 */ 1130 identifier_sym gcc_attribute_list_opt { 1131 $$ = enumeration_constant($1, enumval, true); 1132 } 1133 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1134 $$ = enumeration_constant($1, to_int_constant($4, true), 1135 false); 1136 } 1137 ; 1138 1139 type_qualifier: /* C99 6.7.3 */ 1140 T_QUAL { 1141 $$ = xcalloc(1, sizeof(*$$)); 1142 if ($1 == CONST) 1143 $$->p_const = true; 1144 if ($1 == VOLATILE) 1145 $$->p_volatile = true; 1146 } 1147 ; 1148 1149 pointer: /* C99 6.7.5 */ 1150 asterisk type_qualifier_list_opt { 1151 $$ = merge_qualified_pointer($1, $2); 1152 } 1153 | asterisk type_qualifier_list_opt pointer { 1154 $$ = merge_qualified_pointer($1, $2); 1155 $$ = merge_qualified_pointer($$, $3); 1156 } 1157 ; 1158 1159 asterisk: /* helper for 'pointer' */ 1160 T_ASTERISK { 1161 $$ = xcalloc(1, sizeof(*$$)); 1162 $$->p_pointer = true; 1163 } 1164 ; 1165 1166 type_qualifier_list_opt: /* see C99 6.7.5 */ 1167 /* empty */ { 1168 $$ = NULL; 1169 } 1170 | type_qualifier_list 1171 ; 1172 1173 type_qualifier_list: /* C99 6.7.5 */ 1174 type_qualifier 1175 | type_qualifier_list type_qualifier { 1176 $$ = merge_qualified_pointer($1, $2); 1177 } 1178 ; 1179 1180 /* 1181 * For an explanation of 'notype' in the following rules, see 1182 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1183 */ 1184 1185 notype_init_declarators: 1186 notype_init_declarator 1187 | notype_init_declarators T_COMMA type_init_declarator 1188 ; 1189 1190 type_init_declarators: 1191 type_init_declarator 1192 | type_init_declarators T_COMMA type_init_declarator 1193 ; 1194 1195 notype_init_declarator: 1196 notype_declarator asm_or_symbolrename_opt { 1197 cgram_declare($1, false, $2); 1198 check_size($1); 1199 } 1200 | notype_declarator asm_or_symbolrename_opt { 1201 begin_initialization($1); 1202 cgram_declare($1, true, $2); 1203 } T_ASSIGN initializer { 1204 check_size($1); 1205 end_initialization(); 1206 } 1207 ; 1208 1209 type_init_declarator: 1210 type_declarator asm_or_symbolrename_opt { 1211 cgram_declare($1, false, $2); 1212 check_size($1); 1213 } 1214 | type_declarator asm_or_symbolrename_opt { 1215 begin_initialization($1); 1216 cgram_declare($1, true, $2); 1217 } T_ASSIGN initializer { 1218 check_size($1); 1219 end_initialization(); 1220 } 1221 ; 1222 1223 notype_declarator: 1224 notype_direct_declarator 1225 | pointer notype_direct_declarator { 1226 $$ = add_pointer($2, $1); 1227 } 1228 ; 1229 1230 type_declarator: 1231 type_direct_declarator 1232 | pointer type_direct_declarator { 1233 $$ = add_pointer($2, $1); 1234 } 1235 ; 1236 1237 notype_direct_declarator: 1238 type_attribute_list_opt T_NAME { 1239 $$ = declarator_name(getsym($2)); 1240 } 1241 | type_attribute_list_opt T_LPAREN type_declarator T_RPAREN { 1242 $$ = $3; 1243 } 1244 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1245 $$ = add_array($1, $3.has_dim, $3.dim); 1246 } 1247 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1248 $$ = add_function(symbolrename($1, $3), $2); 1249 end_declaration_level(); 1250 block_level--; 1251 } 1252 | notype_direct_declarator type_attribute 1253 ; 1254 1255 type_direct_declarator: 1256 type_attribute_list_opt identifier { 1257 $$ = declarator_name(getsym($2)); 1258 } 1259 | type_attribute_list_opt T_LPAREN type_declarator T_RPAREN { 1260 $$ = $3; 1261 } 1262 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1263 $$ = add_array($1, $3.has_dim, $3.dim); 1264 } 1265 | type_direct_declarator param_list asm_or_symbolrename_opt { 1266 $$ = add_function(symbolrename($1, $3), $2); 1267 end_declaration_level(); 1268 block_level--; 1269 } 1270 | type_direct_declarator type_attribute 1271 ; 1272 1273 /* 1274 * The two distinct rules type_param_declarator and notype_param_declarator 1275 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1276 * always treated as a typename, not an argument name. For example, after 1277 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1278 * "f(int (double));", not "f(int a);". 1279 */ 1280 type_param_declarator: 1281 direct_param_declarator 1282 | pointer direct_param_declarator { 1283 $$ = add_pointer($2, $1); 1284 } 1285 ; 1286 1287 notype_param_declarator: 1288 direct_notype_param_declarator 1289 | pointer direct_notype_param_declarator { 1290 $$ = add_pointer($2, $1); 1291 } 1292 ; 1293 1294 direct_param_declarator: 1295 identifier type_attribute_list { 1296 $$ = declarator_name(getsym($1)); 1297 } 1298 | identifier { 1299 $$ = declarator_name(getsym($1)); 1300 } 1301 | T_LPAREN notype_param_declarator T_RPAREN { 1302 $$ = $2; 1303 } 1304 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1305 gcc_attribute_list_opt { 1306 $$ = add_array($1, $3.has_dim, $3.dim); 1307 } 1308 | direct_param_declarator param_list asm_or_symbolrename_opt { 1309 $$ = add_function(symbolrename($1, $3), $2); 1310 end_declaration_level(); 1311 block_level--; 1312 } 1313 ; 1314 1315 direct_notype_param_declarator: 1316 identifier { 1317 $$ = declarator_name(getsym($1)); 1318 } 1319 | T_LPAREN notype_param_declarator T_RPAREN { 1320 $$ = $2; 1321 } 1322 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1323 $$ = add_array($1, $3.has_dim, $3.dim); 1324 } 1325 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1326 $$ = add_function(symbolrename($1, $3), $2); 1327 end_declaration_level(); 1328 block_level--; 1329 } 1330 ; 1331 1332 param_list: 1333 id_list_lparen identifier_list T_RPAREN { 1334 $$ = $2; 1335 } 1336 | abstract_decl_param_list 1337 ; 1338 1339 id_list_lparen: 1340 T_LPAREN { 1341 block_level++; 1342 begin_declaration_level(DK_PROTO_ARG); 1343 } 1344 ; 1345 1346 array_size_opt: 1347 /* empty */ { 1348 $$.has_dim = false; 1349 $$.dim = 0; 1350 } 1351 | T_ASTERISK { 1352 /* since C99; variable length array of unspecified size */ 1353 $$.has_dim = false; /* TODO: maybe change to true */ 1354 $$.dim = 0; /* just as a placeholder */ 1355 } 1356 | array_size { 1357 $$.has_dim = true; 1358 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1359 } 1360 ; 1361 1362 array_size: 1363 type_qualifier_list_opt T_SCLASS constant_expr { 1364 /* C11 6.7.6.3p7 */ 1365 if ($2 != STATIC) 1366 yyerror("Bad attribute"); 1367 /* static array size is a C11 extension */ 1368 c11ism(343); 1369 $$ = $3; 1370 } 1371 | T_QUAL { 1372 /* C11 6.7.6.2 */ 1373 if ($1 != RESTRICT) 1374 yyerror("Bad attribute"); 1375 $$ = NULL; 1376 } 1377 | constant_expr 1378 ; 1379 1380 identifier_list: /* C99 6.7.5 */ 1381 T_NAME { 1382 $$ = old_style_function_name(getsym($1)); 1383 } 1384 | identifier_list T_COMMA T_NAME { 1385 $$ = lnklst($1, old_style_function_name(getsym($3))); 1386 } 1387 | identifier_list error 1388 ; 1389 1390 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1391 type_name: /* C99 6.7.6 */ 1392 { 1393 begin_declaration_level(DK_ABSTRACT); 1394 } abstract_declaration { 1395 end_declaration_level(); 1396 $$ = $2->s_type; 1397 } 1398 ; 1399 1400 abstract_declaration: /* specific to lint */ 1401 begin_type_qualifier_list end_type { 1402 $$ = declare_1_abstract(abstract_name()); 1403 } 1404 | begin_type_specifier_qualifier_list end_type { 1405 $$ = declare_1_abstract(abstract_name()); 1406 } 1407 | begin_type_qualifier_list end_type abstract_declarator { 1408 $$ = declare_1_abstract($3); 1409 } 1410 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1411 $$ = declare_1_abstract($3); 1412 } 1413 ; 1414 1415 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1416 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1417 abstract_declarator: 1418 pointer { 1419 $$ = add_pointer(abstract_name(), $1); 1420 } 1421 | direct_abstract_declarator 1422 | pointer direct_abstract_declarator { 1423 $$ = add_pointer($2, $1); 1424 } 1425 | type_attribute_list direct_abstract_declarator { 1426 $$ = $2; 1427 } 1428 | pointer type_attribute_list direct_abstract_declarator { 1429 $$ = add_pointer($3, $1); 1430 } 1431 ; 1432 1433 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1434 direct_abstract_declarator: 1435 /* TODO: sort rules according to C99 */ 1436 T_LPAREN abstract_declarator T_RPAREN { 1437 $$ = $2; 1438 } 1439 | T_LBRACK array_size_opt T_RBRACK { 1440 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1441 } 1442 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1443 $$ = add_array($1, $3.has_dim, $3.dim); 1444 } 1445 | abstract_decl_param_list asm_or_symbolrename_opt { 1446 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1447 end_declaration_level(); 1448 block_level--; 1449 } 1450 | direct_abstract_declarator abstract_decl_param_list 1451 asm_or_symbolrename_opt { 1452 $$ = add_function(symbolrename($1, $3), $2); 1453 end_declaration_level(); 1454 block_level--; 1455 } 1456 | direct_abstract_declarator type_attribute_list 1457 ; 1458 1459 abstract_decl_param_list: /* specific to lint */ 1460 abstract_decl_lparen T_RPAREN type_attribute_opt { 1461 $$ = NULL; 1462 } 1463 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1464 type_attribute_opt { 1465 dcs->d_proto = true; 1466 $$ = $2; 1467 } 1468 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1469 $$ = NULL; 1470 } 1471 ; 1472 1473 abstract_decl_lparen: /* specific to lint */ 1474 T_LPAREN { 1475 block_level++; 1476 begin_declaration_level(DK_PROTO_ARG); 1477 } 1478 ; 1479 1480 vararg_parameter_type_list: /* specific to lint */ 1481 parameter_type_list 1482 | parameter_type_list T_COMMA T_ELLIPSIS { 1483 dcs->d_vararg = true; 1484 $$ = $1; 1485 } 1486 | T_ELLIPSIS { 1487 if (sflag) { 1488 /* ANSI C requires formal parameter before '...' */ 1489 error(84); 1490 } else if (!tflag) { 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 add_designator_subscript($2); 1585 if (!Sflag) 1586 /* array initializer with designators is a C99 ... */ 1587 warning(321); 1588 } 1589 | T_POINT identifier { 1590 if (!Sflag) 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 (!Sflag && $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 if (sflag) { 1925 /* empty declaration */ 1926 error(0); 1927 } else if (!tflag) { 1928 /* empty declaration */ 1929 warning(0); 1930 } 1931 } 1932 ; 1933 1934 /* 1935 * On the top level, lint allows several forms of declarations that it doesn't 1936 * allow in functions. For example, a single ';' is an empty declaration and 1937 * is supported by some compilers, but in a function it would be an empty 1938 * statement, not a declaration. This makes a difference in C90 mode, where 1939 * a statement must not be followed by a declaration. 1940 * 1941 * See 'declaration' for all other declarations. 1942 */ 1943 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1944 begin_type end_type notype_init_declarators T_SEMI { 1945 if (sflag) { 1946 /* old style declaration; add 'int' */ 1947 error(1); 1948 } else if (!tflag) { 1949 /* old style declaration; add 'int' */ 1950 warning(1); 1951 } 1952 } 1953 | declaration 1954 | error T_SEMI { 1955 global_clean_up(); 1956 } 1957 | error T_RBRACE { 1958 global_clean_up(); 1959 } 1960 ; 1961 1962 function_definition: /* C99 6.9.1 */ 1963 func_declarator { 1964 if ($1->s_type->t_tspec != FUNC) { 1965 /* syntax error '%s' */ 1966 error(249, yytext); 1967 YYERROR; 1968 } 1969 if ($1->s_type->t_typedef) { 1970 /* ()-less function definition */ 1971 error(64); 1972 YYERROR; 1973 } 1974 funcdef($1); 1975 block_level++; 1976 begin_declaration_level(DK_OLD_STYLE_ARG); 1977 if (lwarn == LWARN_NONE) 1978 $1->s_used = true; 1979 } arg_declaration_list_opt { 1980 end_declaration_level(); 1981 block_level--; 1982 check_func_lint_directives(); 1983 check_func_old_style_arguments(); 1984 begin_control_statement(CS_FUNCTION_BODY); 1985 } compound_statement { 1986 funcend(); 1987 end_control_statement(CS_FUNCTION_BODY); 1988 } 1989 ; 1990 1991 func_declarator: 1992 begin_type end_type notype_declarator { 1993 if (!allow_trad) { 1994 /* old style declaration; add 'int' */ 1995 error(1); 1996 } 1997 $$ = $3; 1998 } 1999 | begin_type_declmods end_type notype_declarator { 2000 if (!allow_trad) { 2001 /* old style declaration; add 'int' */ 2002 error(1); 2003 } 2004 $$ = $3; 2005 } 2006 | begin_type_declaration_specifiers end_type type_declarator { 2007 $$ = $3; 2008 } 2009 ; 2010 2011 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 2012 /* empty */ 2013 | arg_declaration_list 2014 ; 2015 2016 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2017 arg_declaration 2018 | arg_declaration_list arg_declaration 2019 /* XXX or better "arg_declaration error" ? */ 2020 | error 2021 ; 2022 2023 /* 2024 * "arg_declaration" is separated from "declaration" because it 2025 * needs other error handling. 2026 */ 2027 arg_declaration: 2028 begin_type_declmods end_type T_SEMI { 2029 /* empty declaration */ 2030 warning(2); 2031 } 2032 | begin_type_declmods end_type notype_init_declarators T_SEMI 2033 | begin_type_declaration_specifiers end_type T_SEMI { 2034 if (!dcs->d_nonempty_decl) { 2035 /* empty declaration */ 2036 warning(2); 2037 } else { 2038 /* '%s' declared in argument declaration list */ 2039 warning(3, type_name(dcs->d_type)); 2040 } 2041 } 2042 | begin_type_declaration_specifiers end_type 2043 type_init_declarators T_SEMI { 2044 if (dcs->d_nonempty_decl) { 2045 /* '%s' declared in argument declaration list */ 2046 warning(3, type_name(dcs->d_type)); 2047 } 2048 } 2049 | begin_type_declmods error 2050 | begin_type_declaration_specifiers error 2051 ; 2052 2053 gcc_attribute_list_opt: 2054 /* empty */ 2055 | gcc_attribute_list 2056 ; 2057 2058 gcc_attribute_list: 2059 gcc_attribute 2060 | gcc_attribute_list gcc_attribute 2061 ; 2062 2063 gcc_attribute: 2064 T_ATTRIBUTE T_LPAREN T_LPAREN { 2065 in_gcc_attribute = true; 2066 } gcc_attribute_spec_list { 2067 in_gcc_attribute = false; 2068 } T_RPAREN T_RPAREN 2069 ; 2070 2071 gcc_attribute_spec_list: 2072 gcc_attribute_spec 2073 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2074 ; 2075 2076 gcc_attribute_spec: 2077 /* empty */ 2078 | T_AT_ALWAYS_INLINE 2079 | T_AT_ALIAS T_LPAREN string T_RPAREN 2080 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2081 | T_AT_ALIGNED 2082 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2083 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2084 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2085 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2086 | T_AT_COLD 2087 | T_AT_COMMON 2088 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2089 | T_AT_CONSTRUCTOR 2090 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2091 | T_AT_DEPRECATED 2092 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2093 | T_AT_DESTRUCTOR 2094 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2095 | T_AT_FALLTHROUGH { 2096 fallthru(1); 2097 } 2098 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2099 constant_expr T_COMMA constant_expr T_RPAREN 2100 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2101 | T_AT_GNU_INLINE 2102 | T_AT_HOT 2103 | T_AT_MALLOC 2104 | T_AT_MAY_ALIAS 2105 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2106 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2107 | T_AT_NO_SANITIZE_THREAD 2108 | T_AT_NOINLINE 2109 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2110 | T_AT_NONNULL 2111 | T_AT_NONSTRING 2112 | T_AT_NORETURN 2113 | T_AT_NOTHROW 2114 | T_AT_NO_INSTRUMENT_FUNCTION 2115 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2116 | T_AT_OPTNONE 2117 | T_AT_PACKED { 2118 addpacked(); 2119 } 2120 | T_AT_PCS T_LPAREN string T_RPAREN 2121 | T_AT_PURE 2122 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2123 | T_AT_RETURNS_NONNULL 2124 | T_AT_RETURNS_TWICE 2125 | T_AT_SECTION T_LPAREN string T_RPAREN 2126 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2127 | T_AT_SENTINEL 2128 | T_AT_TARGET T_LPAREN string T_RPAREN 2129 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2130 | T_AT_TUNION 2131 | T_AT_UNUSED { 2132 add_attr_used(); 2133 } 2134 | T_AT_USED { 2135 add_attr_used(); 2136 } 2137 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2138 | T_AT_WARN_UNUSED_RESULT 2139 | T_AT_WEAK 2140 | T_QUAL { 2141 if ($1 != CONST) 2142 yyerror("Bad attribute"); 2143 } 2144 ; 2145 2146 gcc_attribute_bounded: 2147 T_AT_MINBYTES 2148 | T_AT_STRING 2149 | T_AT_BUFFER 2150 ; 2151 2152 gcc_attribute_format: 2153 T_AT_FORMAT_GNU_PRINTF 2154 | T_AT_FORMAT_PRINTF 2155 | T_AT_FORMAT_SCANF 2156 | T_AT_FORMAT_STRFMON 2157 | T_AT_FORMAT_STRFTIME 2158 | T_AT_FORMAT_SYSLOG 2159 ; 2160 2161 sys: 2162 /* empty */ { 2163 $$ = in_system_header; 2164 } 2165 ; 2166 2167 %% 2168 2169 /* ARGSUSED */ 2170 int 2171 yyerror(const char *msg) 2172 { 2173 /* syntax error '%s' */ 2174 error(249, yytext); 2175 if (++sytxerr >= 5) 2176 norecover(); 2177 return 0; 2178 } 2179 2180 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2181 || (defined(YYDEBUG) && defined(YYBISON)) 2182 static const char * 2183 cgram_to_string(int token, YYSTYPE val) 2184 { 2185 2186 switch (token) { 2187 case T_INCDEC: 2188 case T_MULTIPLICATIVE: 2189 case T_ADDITIVE: 2190 case T_SHIFT: 2191 case T_RELATIONAL: 2192 case T_EQUALITY: 2193 case T_OPASSIGN: 2194 return modtab[val.y_op].m_name; 2195 case T_SCLASS: 2196 return scl_name(val.y_scl); 2197 case T_TYPE: 2198 case T_STRUCT_OR_UNION: 2199 return tspec_name(val.y_tspec); 2200 case T_QUAL: 2201 return tqual_name(val.y_tqual); 2202 case T_NAME: 2203 return val.y_name->sb_name; 2204 default: 2205 return "<none>"; 2206 } 2207 } 2208 #endif 2209 2210 #if defined(YYDEBUG) && defined(YYBISON) 2211 static inline void 2212 cgram_print(FILE *output, int token, YYSTYPE val) 2213 { 2214 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2215 } 2216 #endif 2217 2218 static void 2219 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2220 { 2221 declare(decl, initflg, renaming); 2222 if (renaming != NULL) 2223 freeyyv(&renaming, T_NAME); 2224 } 2225 2226 /* 2227 * Discard all input tokens up to and including the next 2228 * unmatched right paren 2229 */ 2230 static void 2231 read_until_rparen(void) 2232 { 2233 int level; 2234 2235 if (yychar < 0) 2236 yychar = yylex(); 2237 freeyyv(&yylval, yychar); 2238 2239 level = 1; 2240 while (yychar != T_RPAREN || --level > 0) { 2241 if (yychar == T_LPAREN) { 2242 level++; 2243 } else if (yychar <= 0) { 2244 break; 2245 } 2246 freeyyv(&yylval, yychar = yylex()); 2247 } 2248 2249 yyclearin; 2250 } 2251 2252 static sym_t * 2253 symbolrename(sym_t *s, sbuf_t *sb) 2254 { 2255 if (sb != NULL) 2256 s->s_rename = sb->sb_name; 2257 return s; 2258 } 2259
Indexes created Fri Oct 03 02:09:57 GMT 2025