cgram.y revision 1.408
1 %{ 2 /* $NetBSD: cgram.y,v 1.408 2022/04/30 19:18:48 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 1.408 2022/04/30 19:18:48 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 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 (!allow_c99) 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 | begin_type T_TYPENAME { 821 $$ = getsym($2)->s_type; 822 } 823 ; 824 825 begin_type_qualifier_list: 826 begin_type T_QUAL { 827 add_qualifier($2); 828 } 829 | begin_type_qualifier_list T_QUAL { 830 add_qualifier($2); 831 } 832 ; 833 834 declmod: 835 T_QUAL { 836 add_qualifier($1); 837 } 838 | T_SCLASS { 839 add_storage_class($1); 840 } 841 | type_attribute_list 842 ; 843 844 type_attribute_list_opt: 845 /* empty */ 846 | type_attribute_list 847 ; 848 849 type_attribute_list: 850 type_attribute 851 | type_attribute_list type_attribute 852 ; 853 854 type_attribute_opt: 855 /* empty */ 856 | type_attribute 857 ; 858 859 type_attribute: /* See C11 6.7 declaration-specifiers */ 860 gcc_attribute 861 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 862 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 863 | T_PACKED { 864 addpacked(); 865 } 866 | T_NORETURN 867 ; 868 869 begin_type: 870 /* empty */ { 871 begin_type(); 872 } 873 ; 874 875 end_type: 876 /* empty */ { 877 end_type(); 878 } 879 ; 880 881 type_specifier: /* C99 6.7.2 */ 882 notype_type_specifier 883 | T_TYPENAME { 884 $$ = 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 (!allow_c99 && !allow_trad) { 1107 /* trailing ',' prohibited in enum declaration */ 1108 error(54); 1109 } else { 1110 /* trailing ',' prohibited in enum declaration */ 1111 c99ism(54); 1112 } 1113 $$ = $1; 1114 } 1115 ; 1116 1117 enumerator_list: /* C99 6.7.2.2 */ 1118 enumerator 1119 | enumerator_list T_COMMA enumerator { 1120 $$ = lnklst($1, $3); 1121 } 1122 | error { 1123 $$ = NULL; 1124 } 1125 ; 1126 1127 enumerator: /* C99 6.7.2.2 */ 1128 identifier_sym gcc_attribute_list_opt { 1129 $$ = enumeration_constant($1, enumval, true); 1130 } 1131 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1132 $$ = enumeration_constant($1, to_int_constant($4, true), 1133 false); 1134 } 1135 ; 1136 1137 type_qualifier: /* C99 6.7.3 */ 1138 T_QUAL { 1139 $$ = xcalloc(1, sizeof(*$$)); 1140 if ($1 == CONST) 1141 $$->p_const = true; 1142 if ($1 == VOLATILE) 1143 $$->p_volatile = true; 1144 } 1145 ; 1146 1147 pointer: /* C99 6.7.5 */ 1148 asterisk type_qualifier_list_opt { 1149 $$ = merge_qualified_pointer($1, $2); 1150 } 1151 | asterisk type_qualifier_list_opt pointer { 1152 $$ = merge_qualified_pointer($1, $2); 1153 $$ = merge_qualified_pointer($$, $3); 1154 } 1155 ; 1156 1157 asterisk: /* helper for 'pointer' */ 1158 T_ASTERISK { 1159 $$ = xcalloc(1, sizeof(*$$)); 1160 $$->p_pointer = true; 1161 } 1162 ; 1163 1164 type_qualifier_list_opt: /* see C99 6.7.5 */ 1165 /* empty */ { 1166 $$ = NULL; 1167 } 1168 | type_qualifier_list 1169 ; 1170 1171 type_qualifier_list: /* C99 6.7.5 */ 1172 type_qualifier 1173 | type_qualifier_list type_qualifier { 1174 $$ = merge_qualified_pointer($1, $2); 1175 } 1176 ; 1177 1178 /* 1179 * For an explanation of 'notype' in the following rules, see 1180 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1181 */ 1182 1183 notype_init_declarators: 1184 notype_init_declarator 1185 | notype_init_declarators T_COMMA type_init_declarator 1186 ; 1187 1188 type_init_declarators: 1189 type_init_declarator 1190 | type_init_declarators T_COMMA type_init_declarator 1191 ; 1192 1193 notype_init_declarator: 1194 notype_declarator asm_or_symbolrename_opt { 1195 cgram_declare($1, false, $2); 1196 check_size($1); 1197 } 1198 | notype_declarator asm_or_symbolrename_opt { 1199 begin_initialization($1); 1200 cgram_declare($1, true, $2); 1201 } T_ASSIGN initializer { 1202 check_size($1); 1203 end_initialization(); 1204 } 1205 ; 1206 1207 type_init_declarator: 1208 type_declarator asm_or_symbolrename_opt { 1209 cgram_declare($1, false, $2); 1210 check_size($1); 1211 } 1212 | type_declarator asm_or_symbolrename_opt { 1213 begin_initialization($1); 1214 cgram_declare($1, true, $2); 1215 } T_ASSIGN initializer { 1216 check_size($1); 1217 end_initialization(); 1218 } 1219 ; 1220 1221 notype_declarator: 1222 notype_direct_declarator 1223 | pointer notype_direct_declarator { 1224 $$ = add_pointer($2, $1); 1225 } 1226 ; 1227 1228 type_declarator: 1229 type_direct_declarator 1230 | pointer type_direct_declarator { 1231 $$ = add_pointer($2, $1); 1232 } 1233 ; 1234 1235 notype_direct_declarator: 1236 type_attribute_list_opt T_NAME { 1237 $$ = declarator_name(getsym($2)); 1238 } 1239 | type_attribute_list_opt T_LPAREN type_declarator T_RPAREN { 1240 $$ = $3; 1241 } 1242 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1243 $$ = add_array($1, $3.has_dim, $3.dim); 1244 } 1245 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1246 $$ = add_function(symbolrename($1, $3), $2); 1247 end_declaration_level(); 1248 block_level--; 1249 } 1250 | notype_direct_declarator type_attribute 1251 ; 1252 1253 type_direct_declarator: 1254 type_attribute_list_opt identifier { 1255 $$ = declarator_name(getsym($2)); 1256 } 1257 | type_attribute_list_opt T_LPAREN type_declarator T_RPAREN { 1258 $$ = $3; 1259 } 1260 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1261 $$ = add_array($1, $3.has_dim, $3.dim); 1262 } 1263 | type_direct_declarator param_list asm_or_symbolrename_opt { 1264 $$ = add_function(symbolrename($1, $3), $2); 1265 end_declaration_level(); 1266 block_level--; 1267 } 1268 | type_direct_declarator type_attribute 1269 ; 1270 1271 /* 1272 * The two distinct rules type_param_declarator and notype_param_declarator 1273 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1274 * always treated as a typename, not an argument name. For example, after 1275 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1276 * "f(int (double));", not "f(int a);". 1277 */ 1278 type_param_declarator: 1279 direct_param_declarator 1280 | pointer direct_param_declarator { 1281 $$ = add_pointer($2, $1); 1282 } 1283 ; 1284 1285 notype_param_declarator: 1286 direct_notype_param_declarator 1287 | pointer direct_notype_param_declarator { 1288 $$ = add_pointer($2, $1); 1289 } 1290 ; 1291 1292 direct_param_declarator: 1293 identifier type_attribute_list { 1294 $$ = declarator_name(getsym($1)); 1295 } 1296 | identifier { 1297 $$ = declarator_name(getsym($1)); 1298 } 1299 | T_LPAREN notype_param_declarator T_RPAREN { 1300 $$ = $2; 1301 } 1302 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1303 gcc_attribute_list_opt { 1304 $$ = add_array($1, $3.has_dim, $3.dim); 1305 } 1306 | direct_param_declarator param_list asm_or_symbolrename_opt { 1307 $$ = add_function(symbolrename($1, $3), $2); 1308 end_declaration_level(); 1309 block_level--; 1310 } 1311 ; 1312 1313 direct_notype_param_declarator: 1314 identifier { 1315 $$ = declarator_name(getsym($1)); 1316 } 1317 | T_LPAREN notype_param_declarator T_RPAREN { 1318 $$ = $2; 1319 } 1320 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1321 $$ = add_array($1, $3.has_dim, $3.dim); 1322 } 1323 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1324 $$ = add_function(symbolrename($1, $3), $2); 1325 end_declaration_level(); 1326 block_level--; 1327 } 1328 ; 1329 1330 param_list: 1331 id_list_lparen identifier_list T_RPAREN { 1332 $$ = $2; 1333 } 1334 | abstract_decl_param_list 1335 ; 1336 1337 id_list_lparen: 1338 T_LPAREN { 1339 block_level++; 1340 begin_declaration_level(DK_PROTO_ARG); 1341 } 1342 ; 1343 1344 array_size_opt: 1345 /* empty */ { 1346 $$.has_dim = false; 1347 $$.dim = 0; 1348 } 1349 | T_ASTERISK { 1350 /* since C99; variable length array of unspecified size */ 1351 $$.has_dim = false; /* TODO: maybe change to true */ 1352 $$.dim = 0; /* just as a placeholder */ 1353 } 1354 | array_size { 1355 $$.has_dim = true; 1356 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1357 } 1358 ; 1359 1360 array_size: 1361 type_qualifier_list_opt T_SCLASS constant_expr { 1362 /* C11 6.7.6.3p7 */ 1363 if ($2 != STATIC) 1364 yyerror("Bad attribute"); 1365 /* static array size is a C11 extension */ 1366 c11ism(343); 1367 $$ = $3; 1368 } 1369 | T_QUAL { 1370 /* C11 6.7.6.2 */ 1371 if ($1 != RESTRICT) 1372 yyerror("Bad attribute"); 1373 $$ = NULL; 1374 } 1375 | constant_expr 1376 ; 1377 1378 identifier_list: /* C99 6.7.5 */ 1379 T_NAME { 1380 $$ = old_style_function_name(getsym($1)); 1381 } 1382 | identifier_list T_COMMA T_NAME { 1383 $$ = lnklst($1, old_style_function_name(getsym($3))); 1384 } 1385 | identifier_list error 1386 ; 1387 1388 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1389 type_name: /* C99 6.7.6 */ 1390 { 1391 begin_declaration_level(DK_ABSTRACT); 1392 } abstract_declaration { 1393 end_declaration_level(); 1394 $$ = $2->s_type; 1395 } 1396 ; 1397 1398 abstract_declaration: /* specific to lint */ 1399 begin_type_qualifier_list end_type { 1400 $$ = declare_1_abstract(abstract_name()); 1401 } 1402 | begin_type_specifier_qualifier_list end_type { 1403 $$ = declare_1_abstract(abstract_name()); 1404 } 1405 | begin_type_qualifier_list end_type abstract_declarator { 1406 $$ = declare_1_abstract($3); 1407 } 1408 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1409 $$ = declare_1_abstract($3); 1410 } 1411 ; 1412 1413 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1414 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1415 abstract_declarator: 1416 pointer { 1417 $$ = add_pointer(abstract_name(), $1); 1418 } 1419 | direct_abstract_declarator 1420 | pointer direct_abstract_declarator { 1421 $$ = add_pointer($2, $1); 1422 } 1423 | type_attribute_list direct_abstract_declarator { 1424 $$ = $2; 1425 } 1426 | pointer type_attribute_list direct_abstract_declarator { 1427 $$ = add_pointer($3, $1); 1428 } 1429 ; 1430 1431 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1432 direct_abstract_declarator: 1433 /* TODO: sort rules according to C99 */ 1434 T_LPAREN abstract_declarator T_RPAREN { 1435 $$ = $2; 1436 } 1437 | T_LBRACK array_size_opt T_RBRACK { 1438 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1439 } 1440 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1441 $$ = add_array($1, $3.has_dim, $3.dim); 1442 } 1443 | abstract_decl_param_list asm_or_symbolrename_opt { 1444 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1445 end_declaration_level(); 1446 block_level--; 1447 } 1448 | direct_abstract_declarator abstract_decl_param_list 1449 asm_or_symbolrename_opt { 1450 $$ = add_function(symbolrename($1, $3), $2); 1451 end_declaration_level(); 1452 block_level--; 1453 } 1454 | direct_abstract_declarator type_attribute_list 1455 ; 1456 1457 abstract_decl_param_list: /* specific to lint */ 1458 abstract_decl_lparen T_RPAREN type_attribute_opt { 1459 $$ = NULL; 1460 } 1461 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1462 type_attribute_opt { 1463 dcs->d_proto = true; 1464 $$ = $2; 1465 } 1466 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1467 $$ = NULL; 1468 } 1469 ; 1470 1471 abstract_decl_lparen: /* specific to lint */ 1472 T_LPAREN { 1473 block_level++; 1474 begin_declaration_level(DK_PROTO_ARG); 1475 } 1476 ; 1477 1478 vararg_parameter_type_list: /* specific to lint */ 1479 parameter_type_list 1480 | parameter_type_list T_COMMA T_ELLIPSIS { 1481 dcs->d_vararg = true; 1482 $$ = $1; 1483 } 1484 | T_ELLIPSIS { 1485 if (sflag) { 1486 /* ANSI C requires formal parameter before '...' */ 1487 error(84); 1488 } else if (!tflag) { 1489 /* ANSI C requires formal parameter before '...' */ 1490 warning(84); 1491 } 1492 dcs->d_vararg = true; 1493 $$ = NULL; 1494 } 1495 ; 1496 1497 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1498 parameter_type_list: 1499 parameter_declaration 1500 | parameter_type_list T_COMMA parameter_declaration { 1501 $$ = lnklst($1, $3); 1502 } 1503 ; 1504 1505 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1506 parameter_declaration: 1507 begin_type_declmods end_type { 1508 /* ^^ There is no check for the missing type-specifier. */ 1509 $$ = declare_argument(abstract_name(), false); 1510 } 1511 | begin_type_declaration_specifiers end_type { 1512 $$ = declare_argument(abstract_name(), false); 1513 } 1514 | begin_type_declmods end_type notype_param_declarator { 1515 /* ^^ There is no check for the missing type-specifier. */ 1516 $$ = declare_argument($3, false); 1517 } 1518 /* 1519 * type_param_declarator is needed because of following conflict: 1520 * "typedef int a; f(int (a));" could be parsed as 1521 * "function with argument a of type int", or 1522 * "function with an abstract argument of type function". 1523 * This grammar realizes the second case. 1524 */ 1525 | begin_type_declaration_specifiers end_type type_param_declarator { 1526 $$ = declare_argument($3, false); 1527 } 1528 | begin_type_declmods end_type abstract_declarator { 1529 /* ^^ There is no check for the missing type-specifier. */ 1530 $$ = declare_argument($3, false); 1531 } 1532 | begin_type_declaration_specifiers end_type abstract_declarator { 1533 $$ = declare_argument($3, false); 1534 } 1535 ; 1536 1537 initializer: /* C99 6.7.8 "Initialization" */ 1538 assignment_expression { 1539 init_expr($1); 1540 } 1541 | init_lbrace init_rbrace { 1542 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1543 } 1544 | init_lbrace initializer_list comma_opt init_rbrace 1545 /* XXX: What is this error handling for? */ 1546 | error 1547 ; 1548 1549 initializer_list: /* C99 6.7.8 "Initialization" */ 1550 initializer_list_item 1551 | initializer_list T_COMMA initializer_list_item 1552 ; 1553 1554 initializer_list_item: /* helper */ 1555 designation initializer 1556 | initializer 1557 ; 1558 1559 designation: /* C99 6.7.8 "Initialization" */ 1560 begin_designation designator_list T_ASSIGN 1561 | identifier T_COLON { 1562 /* GCC style struct or union member name in initializer */ 1563 gnuism(315); 1564 begin_designation(); 1565 add_designator_member($1); 1566 } 1567 ; 1568 1569 begin_designation: /* lint-specific helper */ 1570 /* empty */ { 1571 begin_designation(); 1572 } 1573 ; 1574 1575 designator_list: /* C99 6.7.8 "Initialization" */ 1576 designator 1577 | designator_list designator 1578 ; 1579 1580 designator: /* C99 6.7.8 "Initialization" */ 1581 T_LBRACK range T_RBRACK { 1582 if (!allow_c99) 1583 /* array initializer with designators is a C99 ... */ 1584 warning(321); 1585 add_designator_subscript($2); 1586 } 1587 | T_POINT identifier { 1588 if (!allow_c99) 1589 /* struct or union member name in initializer is ... */ 1590 warning(313); 1591 add_designator_member($2); 1592 } 1593 ; 1594 1595 static_assert_declaration: 1596 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1597 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1598 ; 1599 1600 range: 1601 constant_expr { 1602 $$.lo = to_int_constant($1, true); 1603 $$.hi = $$.lo; 1604 } 1605 | constant_expr T_ELLIPSIS constant_expr { 1606 $$.lo = to_int_constant($1, true); 1607 $$.hi = to_int_constant($3, true); 1608 /* initialization with '[a...b]' is a GCC extension */ 1609 gnuism(340); 1610 } 1611 ; 1612 1613 init_lbrace: /* helper */ 1614 T_LBRACE { 1615 init_lbrace(); 1616 } 1617 ; 1618 1619 init_rbrace: /* helper */ 1620 T_RBRACE { 1621 init_rbrace(); 1622 } 1623 ; 1624 1625 asm_or_symbolrename_opt: /* GCC extensions */ 1626 /* empty */ { 1627 $$ = NULL; 1628 } 1629 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1630 freeyyv(&$3, T_STRING); 1631 $$ = NULL; 1632 } 1633 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1634 $$ = $3; 1635 } 1636 ; 1637 1638 statement: /* C99 6.8 */ 1639 expression_statement 1640 | non_expr_statement 1641 ; 1642 1643 non_expr_statement: /* helper for C99 6.8 */ 1644 gcc_attribute /* ((__fallthrough__)) */ T_SEMI 1645 | labeled_statement 1646 | compound_statement 1647 | selection_statement 1648 | iteration_statement 1649 | jump_statement { 1650 seen_fallthrough = false; 1651 } 1652 | asm_statement 1653 ; 1654 1655 labeled_statement: /* C99 6.8.1 */ 1656 label gcc_attribute_list_opt statement 1657 ; 1658 1659 label: 1660 T_NAME T_COLON { 1661 symtyp = FLABEL; 1662 named_label(getsym($1)); 1663 } 1664 | T_CASE constant_expr T_COLON { 1665 case_label($2); 1666 seen_fallthrough = true; 1667 } 1668 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1669 /* XXX: We don't fill all cases */ 1670 case_label($2); 1671 seen_fallthrough = true; 1672 } 1673 | T_DEFAULT T_COLON { 1674 default_label(); 1675 seen_fallthrough = true; 1676 } 1677 ; 1678 1679 compound_statement: /* C99 6.8.2 */ 1680 compound_statement_lbrace compound_statement_rbrace 1681 | compound_statement_lbrace block_item_list compound_statement_rbrace 1682 ; 1683 1684 compound_statement_lbrace: 1685 T_LBRACE { 1686 block_level++; 1687 mem_block_level++; 1688 begin_declaration_level(DK_AUTO); 1689 } 1690 ; 1691 1692 compound_statement_rbrace: 1693 T_RBRACE { 1694 end_declaration_level(); 1695 level_free_all(mem_block_level); 1696 mem_block_level--; 1697 block_level--; 1698 seen_fallthrough = false; 1699 } 1700 ; 1701 1702 block_item_list: /* C99 6.8.2 */ 1703 block_item 1704 | block_item_list block_item { 1705 if ($1 && !$2) 1706 /* declarations after statements is a C99 feature */ 1707 c99ism(327); 1708 $$ = $1 || $2; 1709 } 1710 ; 1711 1712 block_item: /* C99 6.8.2 */ 1713 declaration_or_error { 1714 $$ = false; 1715 restore_warning_flags(); 1716 } 1717 | statement { 1718 $$ = true; 1719 restore_warning_flags(); 1720 } 1721 ; 1722 1723 expression_statement: /* C99 6.8.3 */ 1724 expression T_SEMI { 1725 expr($1, false, false, false, false); 1726 seen_fallthrough = false; 1727 } 1728 | T_SEMI { 1729 check_statement_reachable(); 1730 seen_fallthrough = false; 1731 } 1732 ; 1733 1734 selection_statement: /* C99 6.8.4 */ 1735 if_without_else %prec T_THEN { 1736 save_warning_flags(); 1737 if2(); 1738 if3(false); 1739 } 1740 | if_without_else T_ELSE { 1741 save_warning_flags(); 1742 if2(); 1743 } statement { 1744 clear_warning_flags(); 1745 if3(true); 1746 } 1747 | if_without_else T_ELSE error { 1748 clear_warning_flags(); 1749 if3(false); 1750 } 1751 | switch_expr statement { 1752 clear_warning_flags(); 1753 switch2(); 1754 } 1755 | switch_expr error { 1756 clear_warning_flags(); 1757 switch2(); 1758 } 1759 ; 1760 1761 if_without_else: /* see C99 6.8.4 */ 1762 if_expr statement 1763 | if_expr error 1764 ; 1765 1766 if_expr: /* see C99 6.8.4 */ 1767 T_IF T_LPAREN expression T_RPAREN { 1768 if1($3); 1769 clear_warning_flags(); 1770 } 1771 ; 1772 1773 switch_expr: /* see C99 6.8.4 */ 1774 T_SWITCH T_LPAREN expression T_RPAREN { 1775 switch1($3); 1776 clear_warning_flags(); 1777 } 1778 ; 1779 1780 iteration_statement: /* C99 6.8.5 */ 1781 while_expr statement { 1782 clear_warning_flags(); 1783 while2(); 1784 } 1785 | while_expr error { 1786 clear_warning_flags(); 1787 while2(); 1788 } 1789 | do_statement do_while_expr { 1790 do2($2); 1791 seen_fallthrough = false; 1792 } 1793 | do error { 1794 clear_warning_flags(); 1795 do2(NULL); 1796 } 1797 | for_exprs statement { 1798 clear_warning_flags(); 1799 for2(); 1800 end_declaration_level(); 1801 block_level--; 1802 } 1803 | for_exprs error { 1804 clear_warning_flags(); 1805 for2(); 1806 end_declaration_level(); 1807 block_level--; 1808 } 1809 ; 1810 1811 while_expr: /* see C99 6.8.5 */ 1812 T_WHILE T_LPAREN expression T_RPAREN { 1813 while1($3); 1814 clear_warning_flags(); 1815 } 1816 ; 1817 1818 do_statement: /* see C99 6.8.5 */ 1819 do statement { 1820 clear_warning_flags(); 1821 } 1822 ; 1823 1824 do: /* see C99 6.8.5 */ 1825 T_DO { 1826 do1(); 1827 } 1828 ; 1829 1830 do_while_expr: /* see C99 6.8.5 */ 1831 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1832 $$ = $3; 1833 } 1834 ; 1835 1836 for_start: /* see C99 6.8.5 */ 1837 T_FOR T_LPAREN { 1838 begin_declaration_level(DK_AUTO); 1839 block_level++; 1840 } 1841 ; 1842 1843 for_exprs: /* see C99 6.8.5 */ 1844 for_start 1845 begin_type_declaration_specifiers end_type 1846 notype_init_declarators T_SEMI 1847 expression_opt T_SEMI 1848 expression_opt T_RPAREN { 1849 /* variable declaration in for loop */ 1850 c99ism(325); 1851 for1(NULL, $6, $8); 1852 clear_warning_flags(); 1853 } 1854 | for_start 1855 expression_opt T_SEMI 1856 expression_opt T_SEMI 1857 expression_opt T_RPAREN { 1858 for1($2, $4, $6); 1859 clear_warning_flags(); 1860 } 1861 ; 1862 1863 jump_statement: /* C99 6.8.6 */ 1864 goto identifier T_SEMI { 1865 do_goto(getsym($2)); 1866 } 1867 | goto error T_SEMI { 1868 symtyp = FVFT; 1869 } 1870 | T_CONTINUE T_SEMI { 1871 do_continue(); 1872 } 1873 | T_BREAK T_SEMI { 1874 do_break(); 1875 } 1876 | T_RETURN sys T_SEMI { 1877 do_return($2, NULL); 1878 } 1879 | T_RETURN sys expression T_SEMI { 1880 do_return($2, $3); 1881 } 1882 ; 1883 1884 goto: /* see C99 6.8.6 */ 1885 T_GOTO { 1886 symtyp = FLABEL; 1887 } 1888 ; 1889 1890 asm_statement: /* GCC extension */ 1891 T_ASM T_LPAREN read_until_rparen T_SEMI { 1892 setasm(); 1893 } 1894 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1895 setasm(); 1896 } 1897 | T_ASM error 1898 ; 1899 1900 read_until_rparen: /* helper for 'asm_statement' */ 1901 /* empty */ { 1902 read_until_rparen(); 1903 } 1904 ; 1905 1906 translation_unit: /* C99 6.9 */ 1907 external_declaration 1908 | translation_unit external_declaration 1909 ; 1910 1911 external_declaration: /* C99 6.9 */ 1912 function_definition { 1913 global_clean_up_decl(false); 1914 clear_warning_flags(); 1915 } 1916 | top_level_declaration { 1917 global_clean_up_decl(false); 1918 clear_warning_flags(); 1919 } 1920 | asm_statement /* GCC extension */ 1921 | T_SEMI { /* GCC extension */ 1922 if (sflag) { 1923 /* empty declaration */ 1924 error(0); 1925 } else if (!tflag) { 1926 /* empty declaration */ 1927 warning(0); 1928 } 1929 } 1930 ; 1931 1932 /* 1933 * On the top level, lint allows several forms of declarations that it doesn't 1934 * allow in functions. For example, a single ';' is an empty declaration and 1935 * is supported by some compilers, but in a function it would be an empty 1936 * statement, not a declaration. This makes a difference in C90 mode, where 1937 * a statement must not be followed by a declaration. 1938 * 1939 * See 'declaration' for all other declarations. 1940 */ 1941 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1942 begin_type end_type notype_init_declarators T_SEMI { 1943 if (sflag) { 1944 /* old style declaration; add 'int' */ 1945 error(1); 1946 } else if (!tflag) { 1947 /* old style declaration; add 'int' */ 1948 warning(1); 1949 } 1950 } 1951 | declaration 1952 | error T_SEMI { 1953 global_clean_up(); 1954 } 1955 | error T_RBRACE { 1956 global_clean_up(); 1957 } 1958 ; 1959 1960 function_definition: /* C99 6.9.1 */ 1961 func_declarator { 1962 if ($1->s_type->t_tspec != FUNC) { 1963 /* syntax error '%s' */ 1964 error(249, yytext); 1965 YYERROR; 1966 } 1967 if ($1->s_type->t_typedef) { 1968 /* ()-less function definition */ 1969 error(64); 1970 YYERROR; 1971 } 1972 funcdef($1); 1973 block_level++; 1974 begin_declaration_level(DK_OLD_STYLE_ARG); 1975 if (lwarn == LWARN_NONE) 1976 $1->s_used = true; 1977 } arg_declaration_list_opt { 1978 end_declaration_level(); 1979 block_level--; 1980 check_func_lint_directives(); 1981 check_func_old_style_arguments(); 1982 begin_control_statement(CS_FUNCTION_BODY); 1983 } compound_statement { 1984 funcend(); 1985 end_control_statement(CS_FUNCTION_BODY); 1986 } 1987 ; 1988 1989 func_declarator: 1990 begin_type end_type notype_declarator { 1991 if (!allow_trad) { 1992 /* old style declaration; add 'int' */ 1993 error(1); 1994 } 1995 $$ = $3; 1996 } 1997 | begin_type_declmods end_type notype_declarator { 1998 if (!allow_trad) { 1999 /* old style declaration; add 'int' */ 2000 error(1); 2001 } 2002 $$ = $3; 2003 } 2004 | begin_type_declaration_specifiers end_type type_declarator { 2005 $$ = $3; 2006 } 2007 ; 2008 2009 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 2010 /* empty */ 2011 | arg_declaration_list 2012 ; 2013 2014 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2015 arg_declaration 2016 | arg_declaration_list arg_declaration 2017 /* XXX or better "arg_declaration error" ? */ 2018 | error 2019 ; 2020 2021 /* 2022 * "arg_declaration" is separated from "declaration" because it 2023 * needs other error handling. 2024 */ 2025 arg_declaration: 2026 begin_type_declmods end_type T_SEMI { 2027 /* empty declaration */ 2028 warning(2); 2029 } 2030 | begin_type_declmods end_type notype_init_declarators T_SEMI 2031 | begin_type_declaration_specifiers end_type T_SEMI { 2032 if (!dcs->d_nonempty_decl) { 2033 /* empty declaration */ 2034 warning(2); 2035 } else { 2036 /* '%s' declared in argument declaration list */ 2037 warning(3, type_name(dcs->d_type)); 2038 } 2039 } 2040 | begin_type_declaration_specifiers end_type 2041 type_init_declarators T_SEMI { 2042 if (dcs->d_nonempty_decl) { 2043 /* '%s' declared in argument declaration list */ 2044 warning(3, type_name(dcs->d_type)); 2045 } 2046 } 2047 | begin_type_declmods error 2048 | begin_type_declaration_specifiers error 2049 ; 2050 2051 gcc_attribute_list_opt: 2052 /* empty */ 2053 | gcc_attribute_list 2054 ; 2055 2056 gcc_attribute_list: 2057 gcc_attribute 2058 | gcc_attribute_list gcc_attribute 2059 ; 2060 2061 gcc_attribute: 2062 T_ATTRIBUTE T_LPAREN T_LPAREN { 2063 in_gcc_attribute = true; 2064 } gcc_attribute_spec_list { 2065 in_gcc_attribute = false; 2066 } T_RPAREN T_RPAREN 2067 ; 2068 2069 gcc_attribute_spec_list: 2070 gcc_attribute_spec 2071 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2072 ; 2073 2074 gcc_attribute_spec: 2075 /* empty */ 2076 | T_AT_ALWAYS_INLINE 2077 | T_AT_ALIAS T_LPAREN string T_RPAREN 2078 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2079 | T_AT_ALIGNED 2080 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2081 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2082 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2083 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2084 | T_AT_COLD 2085 | T_AT_COMMON 2086 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2087 | T_AT_CONSTRUCTOR 2088 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2089 | T_AT_DEPRECATED 2090 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2091 | T_AT_DESTRUCTOR 2092 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2093 | T_AT_FALLTHROUGH { 2094 fallthru(1); 2095 } 2096 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2097 constant_expr T_COMMA constant_expr T_RPAREN 2098 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2099 | T_AT_GNU_INLINE 2100 | T_AT_HOT 2101 | T_AT_MALLOC 2102 | T_AT_MAY_ALIAS 2103 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2104 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2105 | T_AT_NO_SANITIZE_THREAD 2106 | T_AT_NOINLINE 2107 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2108 | T_AT_NONNULL 2109 | T_AT_NONSTRING 2110 | T_AT_NORETURN 2111 | T_AT_NOTHROW 2112 | T_AT_NO_INSTRUMENT_FUNCTION 2113 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2114 | T_AT_OPTNONE 2115 | T_AT_PACKED { 2116 addpacked(); 2117 } 2118 | T_AT_PCS T_LPAREN string T_RPAREN 2119 | T_AT_PURE 2120 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2121 | T_AT_RETURNS_NONNULL 2122 | T_AT_RETURNS_TWICE 2123 | T_AT_SECTION T_LPAREN string T_RPAREN 2124 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2125 | T_AT_SENTINEL 2126 | T_AT_TARGET T_LPAREN string T_RPAREN 2127 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2128 | T_AT_TUNION 2129 | T_AT_UNUSED { 2130 add_attr_used(); 2131 } 2132 | T_AT_USED { 2133 add_attr_used(); 2134 } 2135 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2136 | T_AT_WARN_UNUSED_RESULT 2137 | T_AT_WEAK 2138 | T_QUAL { 2139 if ($1 != CONST) 2140 yyerror("Bad attribute"); 2141 } 2142 ; 2143 2144 gcc_attribute_bounded: 2145 T_AT_MINBYTES 2146 | T_AT_STRING 2147 | T_AT_BUFFER 2148 ; 2149 2150 gcc_attribute_format: 2151 T_AT_FORMAT_GNU_PRINTF 2152 | T_AT_FORMAT_PRINTF 2153 | T_AT_FORMAT_SCANF 2154 | T_AT_FORMAT_STRFMON 2155 | T_AT_FORMAT_STRFTIME 2156 | T_AT_FORMAT_SYSLOG 2157 ; 2158 2159 sys: 2160 /* empty */ { 2161 $$ = in_system_header; 2162 } 2163 ; 2164 2165 %% 2166 2167 /* ARGSUSED */ 2168 int 2169 yyerror(const char *msg) 2170 { 2171 /* syntax error '%s' */ 2172 error(249, yytext); 2173 if (++sytxerr >= 5) 2174 norecover(); 2175 return 0; 2176 } 2177 2178 #if YYDEBUG && (YYBYACC || YYBISON) 2179 static const char * 2180 cgram_to_string(int token, YYSTYPE val) 2181 { 2182 2183 switch (token) { 2184 case T_INCDEC: 2185 case T_MULTIPLICATIVE: 2186 case T_ADDITIVE: 2187 case T_SHIFT: 2188 case T_RELATIONAL: 2189 case T_EQUALITY: 2190 case T_OPASSIGN: 2191 return modtab[val.y_op].m_name; 2192 case T_SCLASS: 2193 return scl_name(val.y_scl); 2194 case T_TYPE: 2195 case T_STRUCT_OR_UNION: 2196 return tspec_name(val.y_tspec); 2197 case T_QUAL: 2198 return tqual_name(val.y_tqual); 2199 case T_NAME: 2200 return val.y_name->sb_name; 2201 default: 2202 return "<none>"; 2203 } 2204 } 2205 #endif 2206 2207 #if YYDEBUG && YYBISON 2208 static inline void 2209 cgram_print(FILE *output, int token, YYSTYPE val) 2210 { 2211 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2212 } 2213 #endif 2214 2215 static void 2216 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2217 { 2218 declare(decl, initflg, renaming); 2219 if (renaming != NULL) 2220 freeyyv(&renaming, T_NAME); 2221 } 2222 2223 /* 2224 * Discard all input tokens up to and including the next 2225 * unmatched right paren 2226 */ 2227 static void 2228 read_until_rparen(void) 2229 { 2230 int level; 2231 2232 if (yychar < 0) 2233 yychar = yylex(); 2234 freeyyv(&yylval, yychar); 2235 2236 level = 1; 2237 while (yychar != T_RPAREN || --level > 0) { 2238 if (yychar == T_LPAREN) { 2239 level++; 2240 } else if (yychar <= 0) { 2241 break; 2242 } 2243 freeyyv(&yylval, yychar = yylex()); 2244 } 2245 2246 yyclearin; 2247 } 2248 2249 static sym_t * 2250 symbolrename(sym_t *s, sbuf_t *sb) 2251 { 2252 if (sb != NULL) 2253 s->s_rename = sb->sb_name; 2254 return s; 2255 } 2256
Indexes created Tue Oct 07 21:09:53 GMT 2025