cgram.y revision 1.395
1 %{ 2 /* $NetBSD: cgram.y,v 1.395 2022/04/16 09:22:25 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 1.395 2022/04/16 09:22:25 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 150 130 131 %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 /* ^^ There is no check for the missing type-specifier. */ 750 | begin_type_declaration_specifiers end_type T_SEMI { 751 if (dcs->d_scl == TYPEDEF) { 752 /* typedef declares no type name */ 753 warning(72); 754 } else if (!dcs->d_nonempty_decl) { 755 /* empty declaration */ 756 warning(2); 757 } 758 } 759 | begin_type_declaration_specifiers end_type 760 type_init_declarators T_SEMI 761 | static_assert_declaration 762 ; 763 764 begin_type_declaration_specifiers: /* see C99 6.7 */ 765 begin_type_typespec { 766 add_type($1); 767 } 768 | begin_type_declmods type_specifier { 769 add_type($2); 770 } 771 | type_attribute begin_type_declaration_specifiers 772 | begin_type_declaration_specifiers declmod 773 | begin_type_declaration_specifiers notype_type_specifier { 774 add_type($2); 775 } 776 ; 777 778 begin_type_declmods: /* see C99 6.7 */ 779 begin_type T_QUAL { 780 add_qualifier($2); 781 } 782 | begin_type T_SCLASS { 783 add_storage_class($2); 784 } 785 | begin_type_declmods declmod 786 ; 787 788 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 789 begin_type_specifier_qualifier_list_postfix 790 | type_attribute_list begin_type_specifier_qualifier_list_postfix 791 ; 792 793 begin_type_specifier_qualifier_list_postfix: 794 begin_type_typespec { 795 add_type($1); 796 } 797 | begin_type_qualifier_list type_specifier { 798 add_type($2); 799 } 800 | begin_type_specifier_qualifier_list_postfix T_QUAL { 801 add_qualifier($2); 802 } 803 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 804 add_type($2); 805 } 806 | begin_type_specifier_qualifier_list_postfix type_attribute 807 ; 808 809 begin_type_typespec: 810 begin_type notype_type_specifier { 811 $$ = $2; 812 } 813 | T_TYPENAME begin_type { 814 $$ = getsym($1)->s_type; 815 } 816 ; 817 818 begin_type_qualifier_list: 819 begin_type T_QUAL { 820 add_qualifier($2); 821 } 822 | begin_type_qualifier_list T_QUAL { 823 add_qualifier($2); 824 } 825 ; 826 827 declmod: 828 T_QUAL { 829 add_qualifier($1); 830 } 831 | T_SCLASS { 832 add_storage_class($1); 833 } 834 | type_attribute_list 835 ; 836 837 type_attribute_list: 838 type_attribute 839 | type_attribute_list type_attribute 840 ; 841 842 type_attribute_opt: 843 /* empty */ 844 | type_attribute 845 ; 846 847 type_attribute: /* See C11 6.7 declaration-specifiers */ 848 gcc_attribute 849 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 850 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 851 | T_PACKED { 852 addpacked(); 853 } 854 | T_NORETURN 855 ; 856 857 begin_type: 858 /* empty */ { 859 begin_type(); 860 } 861 ; 862 863 end_type: 864 /* empty */ { 865 end_type(); 866 } 867 ; 868 869 type_specifier: /* C99 6.7.2 */ 870 notype_type_specifier 871 | T_TYPENAME { 872 $$ = getsym($1)->s_type; 873 } 874 ; 875 876 notype_type_specifier: /* see C99 6.7.2 */ 877 T_TYPE { 878 $$ = gettyp($1); 879 } 880 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 881 $$ = block_dup_type($3->tn_type); 882 $$->t_typeof = true; 883 } 884 | struct_or_union_specifier { 885 end_declaration_level(); 886 $$ = $1; 887 } 888 | enum_specifier { 889 end_declaration_level(); 890 $$ = $1; 891 } 892 ; 893 894 struct_or_union_specifier: /* C99 6.7.2.1 */ 895 struct_or_union identifier_sym { 896 /* 897 * STDC requires that "struct a;" always introduces 898 * a new tag if "a" is not declared at current level 899 * 900 * yychar is valid because otherwise the parser would not 901 * have been able to decide if it must shift or reduce 902 */ 903 $$ = mktag($2, $1, false, yychar == T_SEMI); 904 } 905 | struct_or_union identifier_sym { 906 dcs->d_tagtyp = mktag($2, $1, true, false); 907 } braced_struct_declaration_list { 908 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 909 } 910 | struct_or_union { 911 dcs->d_tagtyp = mktag(NULL, $1, true, false); 912 } braced_struct_declaration_list { 913 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 914 } 915 | struct_or_union error { 916 symtyp = FVFT; 917 $$ = gettyp(INT); 918 } 919 ; 920 921 struct_or_union: /* C99 6.7.2.1 */ 922 T_STRUCT_OR_UNION { 923 symtyp = FTAG; 924 begin_declaration_level($1 == STRUCT ? DK_MOS : DK_MOU); 925 dcs->d_offset_in_bits = 0; 926 dcs->d_sou_align_in_bits = CHAR_SIZE; 927 $$ = $1; 928 } 929 | struct_or_union type_attribute 930 ; 931 932 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 933 struct_declaration_lbrace struct_declaration_list_with_rbrace { 934 $$ = $2; 935 } 936 ; 937 938 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 939 T_LBRACE { 940 symtyp = FVFT; 941 } 942 ; 943 944 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 945 struct_declaration_list T_RBRACE 946 | T_RBRACE { 947 /* XXX: This is not allowed by any C standard. */ 948 $$ = NULL; 949 } 950 ; 951 952 struct_declaration_list: /* C99 6.7.2.1 */ 953 struct_declaration 954 | struct_declaration_list struct_declaration { 955 $$ = lnklst($1, $2); 956 } 957 ; 958 959 struct_declaration: /* C99 6.7.2.1 */ 960 begin_type_qualifier_list end_type { 961 /* ^^ There is no check for the missing type-specifier. */ 962 /* too late, i know, but getsym() compensates it */ 963 symtyp = FMEMBER; 964 } notype_struct_declarators type_attribute_opt T_SEMI { 965 symtyp = FVFT; 966 $$ = $4; 967 } 968 | begin_type_specifier_qualifier_list end_type { 969 symtyp = FMEMBER; 970 } type_struct_declarators type_attribute_opt T_SEMI { 971 symtyp = FVFT; 972 $$ = $4; 973 } 974 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 975 /* syntax error '%s' */ 976 error(249, "member without type"); 977 $$ = NULL; 978 } 979 | begin_type_specifier_qualifier_list end_type type_attribute_opt 980 T_SEMI { 981 symtyp = FVFT; 982 if (!Sflag) 983 /* anonymous struct/union members is a C11 feature */ 984 warning(49); 985 if (is_struct_or_union(dcs->d_type->t_tspec)) { 986 $$ = dcs->d_type->t_str->sou_first_member; 987 /* add all the members of the anonymous struct/union */ 988 anonymize($$); 989 } else { 990 /* syntax error '%s' */ 991 error(249, "unnamed member"); 992 $$ = NULL; 993 } 994 } 995 | static_assert_declaration { 996 $$ = NULL; 997 } 998 | error T_SEMI { 999 symtyp = FVFT; 1000 $$ = NULL; 1001 } 1002 ; 1003 1004 notype_struct_declarators: 1005 notype_struct_declarator { 1006 $$ = declarator_1_struct_union($1); 1007 } 1008 | notype_struct_declarators { 1009 symtyp = FMEMBER; 1010 } T_COMMA type_struct_declarator { 1011 $$ = lnklst($1, declarator_1_struct_union($4)); 1012 } 1013 ; 1014 1015 type_struct_declarators: 1016 type_struct_declarator { 1017 $$ = declarator_1_struct_union($1); 1018 } 1019 | type_struct_declarators { 1020 symtyp = FMEMBER; 1021 } T_COMMA type_struct_declarator { 1022 $$ = lnklst($1, declarator_1_struct_union($4)); 1023 } 1024 ; 1025 1026 notype_struct_declarator: 1027 notype_declarator 1028 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1029 $$ = bitfield($1, to_int_constant($3, true)); 1030 } 1031 | { 1032 symtyp = FVFT; 1033 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1034 $$ = bitfield(NULL, to_int_constant($3, true)); 1035 } 1036 ; 1037 1038 type_struct_declarator: 1039 type_declarator 1040 | type_declarator T_COLON constant_expr { 1041 $$ = bitfield($1, to_int_constant($3, true)); 1042 } 1043 | { 1044 symtyp = FVFT; 1045 } T_COLON constant_expr { 1046 $$ = bitfield(NULL, to_int_constant($3, true)); 1047 } 1048 ; 1049 1050 /* K&R ---, C90 6.5.2.2, C99 6.7.2.2, C11 6.7.2.2 */ 1051 enum_specifier: /* C99 6.7.2.2 */ 1052 enum gcc_attribute_list_opt identifier_sym { 1053 $$ = mktag($3, ENUM, false, false); 1054 } 1055 | enum gcc_attribute_list_opt identifier_sym { 1056 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1057 } enum_declaration /*gcc_attribute_list_opt*/ { 1058 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1059 } 1060 | enum gcc_attribute_list_opt { 1061 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1062 } enum_declaration /*gcc_attribute_list_opt*/ { 1063 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1064 } 1065 | enum error { 1066 symtyp = FVFT; 1067 $$ = gettyp(INT); 1068 } 1069 ; 1070 1071 enum: /* helper for C99 6.7.2.2 */ 1072 T_ENUM { 1073 symtyp = FTAG; 1074 begin_declaration_level(DK_ENUM_CONST); 1075 } 1076 ; 1077 1078 enum_declaration: /* helper for C99 6.7.2.2 */ 1079 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1080 $$ = $2; 1081 } 1082 ; 1083 1084 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1085 T_LBRACE { 1086 symtyp = FVFT; 1087 enumval = 0; 1088 } 1089 ; 1090 1091 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1092 enumerator_list 1093 | enumerator_list T_COMMA { 1094 if (Sflag) { 1095 /* C99 6.7.2.2p1 allows trailing ',' */ 1096 } else if (sflag) { 1097 /* trailing ',' prohibited in enum declaration */ 1098 error(54); 1099 } else { 1100 /* trailing ',' prohibited in enum declaration */ 1101 c99ism(54); 1102 } 1103 $$ = $1; 1104 } 1105 ; 1106 1107 enumerator_list: /* C99 6.7.2.2 */ 1108 enumerator 1109 | enumerator_list T_COMMA enumerator { 1110 $$ = lnklst($1, $3); 1111 } 1112 | error { 1113 $$ = NULL; 1114 } 1115 ; 1116 1117 enumerator: /* C99 6.7.2.2 */ 1118 identifier_sym gcc_attribute_list_opt { 1119 $$ = enumeration_constant($1, enumval, true); 1120 } 1121 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1122 $$ = enumeration_constant($1, to_int_constant($4, true), 1123 false); 1124 } 1125 ; 1126 1127 type_qualifier: /* C99 6.7.3 */ 1128 T_QUAL { 1129 $$ = xcalloc(1, sizeof(*$$)); 1130 if ($1 == CONST) 1131 $$->p_const = true; 1132 if ($1 == VOLATILE) 1133 $$->p_volatile = true; 1134 } 1135 ; 1136 1137 pointer: /* C99 6.7.5 */ 1138 asterisk type_qualifier_list_opt { 1139 $$ = merge_qualified_pointer($1, $2); 1140 } 1141 | asterisk type_qualifier_list_opt pointer { 1142 $$ = merge_qualified_pointer($1, $2); 1143 $$ = merge_qualified_pointer($$, $3); 1144 } 1145 ; 1146 1147 asterisk: /* helper for 'pointer' */ 1148 T_ASTERISK { 1149 $$ = xcalloc(1, sizeof(*$$)); 1150 $$->p_pointer = true; 1151 } 1152 ; 1153 1154 type_qualifier_list_opt: /* see C99 6.7.5 */ 1155 /* empty */ { 1156 $$ = NULL; 1157 } 1158 | type_qualifier_list 1159 ; 1160 1161 type_qualifier_list: /* C99 6.7.5 */ 1162 type_qualifier 1163 | type_qualifier_list type_qualifier { 1164 $$ = merge_qualified_pointer($1, $2); 1165 } 1166 ; 1167 1168 /* 1169 * For an explanation of 'notype' in the following rules, see 1170 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1171 */ 1172 1173 notype_init_declarators: 1174 notype_init_declarator 1175 | notype_init_declarators T_COMMA type_init_declarator 1176 ; 1177 1178 type_init_declarators: 1179 type_init_declarator 1180 | type_init_declarators T_COMMA type_init_declarator 1181 ; 1182 1183 notype_init_declarator: 1184 notype_declarator asm_or_symbolrename_opt { 1185 cgram_declare($1, false, $2); 1186 check_size($1); 1187 } 1188 | notype_declarator asm_or_symbolrename_opt { 1189 begin_initialization($1); 1190 cgram_declare($1, true, $2); 1191 } T_ASSIGN initializer { 1192 check_size($1); 1193 end_initialization(); 1194 } 1195 ; 1196 1197 type_init_declarator: 1198 type_declarator asm_or_symbolrename_opt { 1199 cgram_declare($1, false, $2); 1200 check_size($1); 1201 } 1202 | type_declarator asm_or_symbolrename_opt { 1203 begin_initialization($1); 1204 cgram_declare($1, true, $2); 1205 } T_ASSIGN initializer { 1206 check_size($1); 1207 end_initialization(); 1208 } 1209 ; 1210 1211 notype_declarator: 1212 notype_direct_declarator 1213 | pointer notype_direct_declarator { 1214 $$ = add_pointer($2, $1); 1215 } 1216 ; 1217 1218 type_declarator: 1219 type_direct_declarator 1220 | pointer type_direct_declarator { 1221 $$ = add_pointer($2, $1); 1222 } 1223 ; 1224 1225 notype_direct_declarator: 1226 T_NAME { 1227 $$ = declarator_name(getsym($1)); 1228 } 1229 | T_LPAREN type_declarator T_RPAREN { 1230 $$ = $2; 1231 } 1232 | type_attribute notype_direct_declarator { 1233 $$ = $2; 1234 } 1235 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1236 $$ = add_array($1, $3.has_dim, $3.dim); 1237 } 1238 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1239 $$ = add_function(symbolrename($1, $3), $2); 1240 end_declaration_level(); 1241 block_level--; 1242 } 1243 | notype_direct_declarator type_attribute 1244 ; 1245 1246 type_direct_declarator: 1247 identifier { 1248 $$ = declarator_name(getsym($1)); 1249 } 1250 | T_LPAREN type_declarator T_RPAREN { 1251 $$ = $2; 1252 } 1253 | type_attribute type_direct_declarator { 1254 $$ = $2; 1255 } 1256 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1257 $$ = add_array($1, $3.has_dim, $3.dim); 1258 } 1259 | type_direct_declarator param_list asm_or_symbolrename_opt { 1260 $$ = add_function(symbolrename($1, $3), $2); 1261 end_declaration_level(); 1262 block_level--; 1263 } 1264 | type_direct_declarator type_attribute 1265 ; 1266 1267 /* 1268 * The two distinct rules type_param_declarator and notype_param_declarator 1269 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1270 * always treated as a typename, not an argument name. For example, after 1271 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1272 * "f(int (double));", not "f(int a);". 1273 */ 1274 type_param_declarator: 1275 direct_param_declarator 1276 | pointer direct_param_declarator { 1277 $$ = add_pointer($2, $1); 1278 } 1279 ; 1280 1281 notype_param_declarator: 1282 direct_notype_param_declarator 1283 | pointer direct_notype_param_declarator { 1284 $$ = add_pointer($2, $1); 1285 } 1286 ; 1287 1288 direct_param_declarator: 1289 identifier type_attribute_list { 1290 $$ = declarator_name(getsym($1)); 1291 } 1292 | identifier { 1293 $$ = declarator_name(getsym($1)); 1294 } 1295 | T_LPAREN notype_param_declarator T_RPAREN { 1296 $$ = $2; 1297 } 1298 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1299 gcc_attribute_list_opt { 1300 $$ = add_array($1, $3.has_dim, $3.dim); 1301 } 1302 | direct_param_declarator param_list asm_or_symbolrename_opt { 1303 $$ = add_function(symbolrename($1, $3), $2); 1304 end_declaration_level(); 1305 block_level--; 1306 } 1307 ; 1308 1309 direct_notype_param_declarator: 1310 identifier { 1311 $$ = declarator_name(getsym($1)); 1312 } 1313 | T_LPAREN notype_param_declarator T_RPAREN { 1314 $$ = $2; 1315 } 1316 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1317 $$ = add_array($1, $3.has_dim, $3.dim); 1318 } 1319 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1320 $$ = add_function(symbolrename($1, $3), $2); 1321 end_declaration_level(); 1322 block_level--; 1323 } 1324 ; 1325 1326 param_list: 1327 id_list_lparen identifier_list T_RPAREN { 1328 $$ = $2; 1329 } 1330 | abstract_decl_param_list 1331 ; 1332 1333 id_list_lparen: 1334 T_LPAREN { 1335 block_level++; 1336 begin_declaration_level(DK_PROTO_ARG); 1337 } 1338 ; 1339 1340 array_size_opt: 1341 /* empty */ { 1342 $$.has_dim = false; 1343 $$.dim = 0; 1344 } 1345 | T_ASTERISK { 1346 /* since C99; variable length array of unspecified size */ 1347 $$.has_dim = false; /* TODO: maybe change to true */ 1348 $$.dim = 0; /* just as a placeholder */ 1349 } 1350 | array_size { 1351 $$.has_dim = true; 1352 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1353 } 1354 ; 1355 1356 array_size: 1357 type_qualifier_list_opt T_SCLASS constant_expr { 1358 /* C11 6.7.6.3p7 */ 1359 if ($2 != STATIC) 1360 yyerror("Bad attribute"); 1361 /* static array size is a C11 extension */ 1362 c11ism(343); 1363 $$ = $3; 1364 } 1365 | T_QUAL { 1366 /* C11 6.7.6.2 */ 1367 if ($1 != RESTRICT) 1368 yyerror("Bad attribute"); 1369 $$ = NULL; 1370 } 1371 | constant_expr 1372 ; 1373 1374 identifier_list: /* C99 6.7.5 */ 1375 T_NAME { 1376 $$ = old_style_function_name(getsym($1)); 1377 } 1378 | identifier_list T_COMMA T_NAME { 1379 $$ = lnklst($1, old_style_function_name(getsym($3))); 1380 } 1381 | identifier_list error 1382 ; 1383 1384 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1385 type_name: /* C99 6.7.6 */ 1386 { 1387 begin_declaration_level(DK_ABSTRACT); 1388 } abstract_declaration { 1389 end_declaration_level(); 1390 $$ = $2->s_type; 1391 } 1392 ; 1393 1394 abstract_declaration: /* specific to lint */ 1395 begin_type_qualifier_list end_type { 1396 $$ = declare_1_abstract(abstract_name()); 1397 } 1398 | begin_type_specifier_qualifier_list end_type { 1399 $$ = declare_1_abstract(abstract_name()); 1400 } 1401 | begin_type_qualifier_list end_type abstract_declarator { 1402 $$ = declare_1_abstract($3); 1403 } 1404 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1405 $$ = declare_1_abstract($3); 1406 } 1407 ; 1408 1409 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1410 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1411 abstract_declarator: 1412 pointer { 1413 $$ = add_pointer(abstract_name(), $1); 1414 } 1415 | direct_abstract_declarator 1416 | pointer direct_abstract_declarator { 1417 $$ = add_pointer($2, $1); 1418 } 1419 ; 1420 1421 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1422 direct_abstract_declarator: 1423 /* TODO: sort rules according to C99 */ 1424 T_LPAREN abstract_declarator T_RPAREN { 1425 $$ = $2; 1426 } 1427 | T_LBRACK array_size_opt T_RBRACK { 1428 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1429 } 1430 | type_attribute direct_abstract_declarator { 1431 $$ = $2; 1432 } 1433 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1434 $$ = add_array($1, $3.has_dim, $3.dim); 1435 } 1436 | abstract_decl_param_list asm_or_symbolrename_opt { 1437 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1438 end_declaration_level(); 1439 block_level--; 1440 } 1441 | direct_abstract_declarator abstract_decl_param_list 1442 asm_or_symbolrename_opt { 1443 $$ = add_function(symbolrename($1, $3), $2); 1444 end_declaration_level(); 1445 block_level--; 1446 } 1447 | direct_abstract_declarator type_attribute_list 1448 ; 1449 1450 abstract_decl_param_list: /* specific to lint */ 1451 abstract_decl_lparen T_RPAREN type_attribute_opt { 1452 $$ = NULL; 1453 } 1454 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1455 type_attribute_opt { 1456 dcs->d_proto = true; 1457 $$ = $2; 1458 } 1459 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1460 $$ = NULL; 1461 } 1462 ; 1463 1464 abstract_decl_lparen: /* specific to lint */ 1465 T_LPAREN { 1466 block_level++; 1467 begin_declaration_level(DK_PROTO_ARG); 1468 } 1469 ; 1470 1471 vararg_parameter_type_list: /* specific to lint */ 1472 parameter_type_list 1473 | parameter_type_list T_COMMA T_ELLIPSIS { 1474 dcs->d_vararg = true; 1475 $$ = $1; 1476 } 1477 | T_ELLIPSIS { 1478 if (sflag) { 1479 /* ANSI C requires formal parameter before '...' */ 1480 error(84); 1481 } else if (!tflag) { 1482 /* ANSI C requires formal parameter before '...' */ 1483 warning(84); 1484 } 1485 dcs->d_vararg = true; 1486 $$ = NULL; 1487 } 1488 ; 1489 1490 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1491 parameter_type_list: 1492 parameter_declaration 1493 | parameter_type_list T_COMMA parameter_declaration { 1494 $$ = lnklst($1, $3); 1495 } 1496 ; 1497 1498 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1499 parameter_declaration: 1500 begin_type_declmods end_type { 1501 /* ^^ There is no check for the missing type-specifier. */ 1502 $$ = declare_argument(abstract_name(), false); 1503 } 1504 | begin_type_declaration_specifiers end_type { 1505 $$ = declare_argument(abstract_name(), false); 1506 } 1507 | begin_type_declmods end_type notype_param_declarator { 1508 /* ^^ There is no check for the missing type-specifier. */ 1509 $$ = declare_argument($3, false); 1510 } 1511 /* 1512 * type_param_declarator is needed because of following conflict: 1513 * "typedef int a; f(int (a));" could be parsed as 1514 * "function with argument a of type int", or 1515 * "function with an abstract argument of type function". 1516 * This grammar realizes the second case. 1517 */ 1518 | begin_type_declaration_specifiers end_type type_param_declarator { 1519 $$ = declare_argument($3, false); 1520 } 1521 | begin_type_declmods end_type abstract_declarator { 1522 /* ^^ There is no check for the missing type-specifier. */ 1523 $$ = declare_argument($3, false); 1524 } 1525 | begin_type_declaration_specifiers end_type abstract_declarator { 1526 $$ = declare_argument($3, false); 1527 } 1528 ; 1529 1530 initializer: /* C99 6.7.8 "Initialization" */ 1531 assignment_expression { 1532 init_expr($1); 1533 } 1534 | init_lbrace init_rbrace { 1535 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1536 } 1537 | init_lbrace initializer_list comma_opt init_rbrace 1538 /* XXX: What is this error handling for? */ 1539 | error 1540 ; 1541 1542 initializer_list: /* C99 6.7.8 "Initialization" */ 1543 initializer_list_item 1544 | initializer_list T_COMMA initializer_list_item 1545 ; 1546 1547 initializer_list_item: /* helper */ 1548 designation initializer 1549 | initializer 1550 ; 1551 1552 designation: /* C99 6.7.8 "Initialization" */ 1553 begin_designation designator_list T_ASSIGN 1554 | identifier T_COLON { 1555 /* GCC style struct or union member name in initializer */ 1556 gnuism(315); 1557 begin_designation(); 1558 add_designator_member($1); 1559 } 1560 ; 1561 1562 begin_designation: /* lint-specific helper */ 1563 /* empty */ { 1564 begin_designation(); 1565 } 1566 ; 1567 1568 designator_list: /* C99 6.7.8 "Initialization" */ 1569 designator 1570 | designator_list designator 1571 ; 1572 1573 designator: /* C99 6.7.8 "Initialization" */ 1574 T_LBRACK range T_RBRACK { 1575 add_designator_subscript($2); 1576 if (!Sflag) 1577 /* array initializer with designators is a C99 ... */ 1578 warning(321); 1579 } 1580 | T_POINT identifier { 1581 if (!Sflag) 1582 /* struct or union member name in initializer is ... */ 1583 warning(313); 1584 add_designator_member($2); 1585 } 1586 ; 1587 1588 static_assert_declaration: 1589 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1590 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1591 ; 1592 1593 range: 1594 constant_expr { 1595 $$.lo = to_int_constant($1, true); 1596 $$.hi = $$.lo; 1597 } 1598 | constant_expr T_ELLIPSIS constant_expr { 1599 $$.lo = to_int_constant($1, true); 1600 $$.hi = to_int_constant($3, true); 1601 /* initialization with '[a...b]' is a GCC extension */ 1602 gnuism(340); 1603 } 1604 ; 1605 1606 init_lbrace: /* helper */ 1607 T_LBRACE { 1608 init_lbrace(); 1609 } 1610 ; 1611 1612 init_rbrace: /* helper */ 1613 T_RBRACE { 1614 init_rbrace(); 1615 } 1616 ; 1617 1618 asm_or_symbolrename_opt: /* GCC extensions */ 1619 /* empty */ { 1620 $$ = NULL; 1621 } 1622 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1623 freeyyv(&$3, T_STRING); 1624 $$ = NULL; 1625 } 1626 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1627 $$ = $3; 1628 } 1629 ; 1630 1631 statement: /* C99 6.8 */ 1632 expression_statement 1633 | non_expr_statement 1634 ; 1635 1636 non_expr_statement: /* helper for C99 6.8 */ 1637 type_attribute T_SEMI 1638 | labeled_statement 1639 | compound_statement 1640 | selection_statement 1641 | iteration_statement 1642 | jump_statement { 1643 seen_fallthrough = false; 1644 } 1645 | asm_statement 1646 ; 1647 1648 labeled_statement: /* C99 6.8.1 */ 1649 label type_attribute_opt statement 1650 ; 1651 1652 label: 1653 T_NAME T_COLON { 1654 symtyp = FLABEL; 1655 named_label(getsym($1)); 1656 } 1657 | T_CASE constant_expr T_COLON { 1658 case_label($2); 1659 seen_fallthrough = true; 1660 } 1661 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1662 /* XXX: We don't fill all cases */ 1663 case_label($2); 1664 seen_fallthrough = true; 1665 } 1666 | T_DEFAULT T_COLON { 1667 default_label(); 1668 seen_fallthrough = true; 1669 } 1670 ; 1671 1672 compound_statement: /* C99 6.8.2 */ 1673 compound_statement_lbrace compound_statement_rbrace 1674 | compound_statement_lbrace block_item_list compound_statement_rbrace 1675 ; 1676 1677 compound_statement_lbrace: 1678 T_LBRACE { 1679 block_level++; 1680 mem_block_level++; 1681 begin_declaration_level(DK_AUTO); 1682 } 1683 ; 1684 1685 compound_statement_rbrace: 1686 T_RBRACE { 1687 end_declaration_level(); 1688 level_free_all(mem_block_level); 1689 mem_block_level--; 1690 block_level--; 1691 seen_fallthrough = false; 1692 } 1693 ; 1694 1695 block_item_list: /* C99 6.8.2 */ 1696 block_item 1697 | block_item_list block_item { 1698 if (!Sflag && $1 && !$2) 1699 /* declarations after statements is a C99 feature */ 1700 c99ism(327); 1701 $$ = $1 || $2; 1702 } 1703 ; 1704 1705 block_item: /* C99 6.8.2 */ 1706 declaration_or_error { 1707 $$ = false; 1708 restore_warning_flags(); 1709 } 1710 | statement { 1711 $$ = true; 1712 restore_warning_flags(); 1713 } 1714 ; 1715 1716 expression_statement: /* C99 6.8.3 */ 1717 expression T_SEMI { 1718 expr($1, false, false, false, false); 1719 seen_fallthrough = false; 1720 } 1721 | T_SEMI { 1722 check_statement_reachable(); 1723 seen_fallthrough = false; 1724 } 1725 ; 1726 1727 selection_statement: /* C99 6.8.4 */ 1728 if_without_else %prec T_THEN { 1729 save_warning_flags(); 1730 if2(); 1731 if3(false); 1732 } 1733 | if_without_else T_ELSE { 1734 save_warning_flags(); 1735 if2(); 1736 } statement { 1737 clear_warning_flags(); 1738 if3(true); 1739 } 1740 | if_without_else T_ELSE error { 1741 clear_warning_flags(); 1742 if3(false); 1743 } 1744 | switch_expr statement { 1745 clear_warning_flags(); 1746 switch2(); 1747 } 1748 | switch_expr error { 1749 clear_warning_flags(); 1750 switch2(); 1751 } 1752 ; 1753 1754 if_without_else: /* see C99 6.8.4 */ 1755 if_expr statement 1756 | if_expr error 1757 ; 1758 1759 if_expr: /* see C99 6.8.4 */ 1760 T_IF T_LPAREN expression T_RPAREN { 1761 if1($3); 1762 clear_warning_flags(); 1763 } 1764 ; 1765 1766 switch_expr: /* see C99 6.8.4 */ 1767 T_SWITCH T_LPAREN expression T_RPAREN { 1768 switch1($3); 1769 clear_warning_flags(); 1770 } 1771 ; 1772 1773 iteration_statement: /* C99 6.8.5 */ 1774 while_expr statement { 1775 clear_warning_flags(); 1776 while2(); 1777 } 1778 | while_expr error { 1779 clear_warning_flags(); 1780 while2(); 1781 } 1782 | do_statement do_while_expr { 1783 do2($2); 1784 seen_fallthrough = false; 1785 } 1786 | do error { 1787 clear_warning_flags(); 1788 do2(NULL); 1789 } 1790 | for_exprs statement { 1791 clear_warning_flags(); 1792 for2(); 1793 end_declaration_level(); 1794 block_level--; 1795 } 1796 | for_exprs error { 1797 clear_warning_flags(); 1798 for2(); 1799 end_declaration_level(); 1800 block_level--; 1801 } 1802 ; 1803 1804 while_expr: /* see C99 6.8.5 */ 1805 T_WHILE T_LPAREN expression T_RPAREN { 1806 while1($3); 1807 clear_warning_flags(); 1808 } 1809 ; 1810 1811 do_statement: /* see C99 6.8.5 */ 1812 do statement { 1813 clear_warning_flags(); 1814 } 1815 ; 1816 1817 do: /* see C99 6.8.5 */ 1818 T_DO { 1819 do1(); 1820 } 1821 ; 1822 1823 do_while_expr: /* see C99 6.8.5 */ 1824 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1825 $$ = $3; 1826 } 1827 ; 1828 1829 for_start: /* see C99 6.8.5 */ 1830 T_FOR T_LPAREN { 1831 begin_declaration_level(DK_AUTO); 1832 block_level++; 1833 } 1834 ; 1835 1836 for_exprs: /* see C99 6.8.5 */ 1837 for_start 1838 begin_type_declaration_specifiers end_type 1839 notype_init_declarators T_SEMI 1840 expression_opt T_SEMI 1841 expression_opt T_RPAREN { 1842 /* variable declaration in for loop */ 1843 c99ism(325); 1844 for1(NULL, $6, $8); 1845 clear_warning_flags(); 1846 } 1847 | for_start 1848 expression_opt T_SEMI 1849 expression_opt T_SEMI 1850 expression_opt T_RPAREN { 1851 for1($2, $4, $6); 1852 clear_warning_flags(); 1853 } 1854 ; 1855 1856 jump_statement: /* C99 6.8.6 */ 1857 goto identifier T_SEMI { 1858 do_goto(getsym($2)); 1859 } 1860 | goto error T_SEMI { 1861 symtyp = FVFT; 1862 } 1863 | T_CONTINUE T_SEMI { 1864 do_continue(); 1865 } 1866 | T_BREAK T_SEMI { 1867 do_break(); 1868 } 1869 | T_RETURN sys T_SEMI { 1870 do_return($2, NULL); 1871 } 1872 | T_RETURN sys expression T_SEMI { 1873 do_return($2, $3); 1874 } 1875 ; 1876 1877 goto: /* see C99 6.8.6 */ 1878 T_GOTO { 1879 symtyp = FLABEL; 1880 } 1881 ; 1882 1883 asm_statement: /* GCC extension */ 1884 T_ASM T_LPAREN read_until_rparen T_SEMI { 1885 setasm(); 1886 } 1887 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1888 setasm(); 1889 } 1890 | T_ASM error 1891 ; 1892 1893 read_until_rparen: /* helper for 'asm_statement' */ 1894 /* empty */ { 1895 read_until_rparen(); 1896 } 1897 ; 1898 1899 translation_unit: /* C99 6.9 */ 1900 external_declaration 1901 | translation_unit external_declaration 1902 ; 1903 1904 external_declaration: /* C99 6.9 */ 1905 function_definition { 1906 global_clean_up_decl(false); 1907 clear_warning_flags(); 1908 } 1909 | top_level_declaration { 1910 global_clean_up_decl(false); 1911 clear_warning_flags(); 1912 } 1913 | asm_statement /* GCC extension */ 1914 | T_SEMI { /* GCC extension */ 1915 if (sflag) { 1916 /* empty declaration */ 1917 error(0); 1918 } else if (!tflag) { 1919 /* empty declaration */ 1920 warning(0); 1921 } 1922 } 1923 ; 1924 1925 /* 1926 * On the top level, lint allows several forms of declarations that it doesn't 1927 * allow in functions. For example, a single ';' is an empty declaration and 1928 * is supported by some compilers, but in a function it would be an empty 1929 * statement, not a declaration. This makes a difference in C90 mode, where 1930 * a statement must not be followed by a declaration. 1931 * 1932 * See 'declaration' for all other declarations. 1933 */ 1934 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1935 begin_type end_type notype_init_declarators T_SEMI { 1936 if (sflag) { 1937 /* old style declaration; add 'int' */ 1938 error(1); 1939 } else if (!tflag) { 1940 /* old style declaration; add 'int' */ 1941 warning(1); 1942 } 1943 } 1944 | declaration 1945 | error T_SEMI { 1946 global_clean_up(); 1947 } 1948 | error T_RBRACE { 1949 global_clean_up(); 1950 } 1951 ; 1952 1953 function_definition: /* C99 6.9.1 */ 1954 func_declarator { 1955 if ($1->s_type->t_tspec != FUNC) { 1956 /* syntax error '%s' */ 1957 error(249, yytext); 1958 YYERROR; 1959 } 1960 if ($1->s_type->t_typedef) { 1961 /* ()-less function definition */ 1962 error(64); 1963 YYERROR; 1964 } 1965 funcdef($1); 1966 block_level++; 1967 begin_declaration_level(DK_OLD_STYLE_ARG); 1968 if (lwarn == LWARN_NONE) 1969 $1->s_used = true; 1970 } arg_declaration_list_opt { 1971 end_declaration_level(); 1972 block_level--; 1973 check_func_lint_directives(); 1974 check_func_old_style_arguments(); 1975 begin_control_statement(CS_FUNCTION_BODY); 1976 } compound_statement { 1977 funcend(); 1978 end_control_statement(CS_FUNCTION_BODY); 1979 } 1980 ; 1981 1982 func_declarator: 1983 begin_type end_type notype_declarator { 1984 /* ^^ There is no check for the missing type-specifier. */ 1985 $$ = $3; 1986 } 1987 | begin_type_declmods end_type notype_declarator { 1988 /* ^^ There is no check for the missing type-specifier. */ 1989 $$ = $3; 1990 } 1991 | begin_type_declaration_specifiers end_type type_declarator { 1992 $$ = $3; 1993 } 1994 ; 1995 1996 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1997 /* empty */ 1998 | arg_declaration_list 1999 ; 2000 2001 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2002 arg_declaration 2003 | arg_declaration_list arg_declaration 2004 /* XXX or better "arg_declaration error" ? */ 2005 | error 2006 ; 2007 2008 /* 2009 * "arg_declaration" is separated from "declaration" because it 2010 * needs other error handling. 2011 */ 2012 arg_declaration: 2013 begin_type_declmods end_type T_SEMI { 2014 /* empty declaration */ 2015 warning(2); 2016 } 2017 | begin_type_declmods end_type notype_init_declarators T_SEMI 2018 | begin_type_declaration_specifiers end_type T_SEMI { 2019 if (!dcs->d_nonempty_decl) { 2020 /* empty declaration */ 2021 warning(2); 2022 } else { 2023 /* '%s' declared in argument declaration list */ 2024 warning(3, type_name(dcs->d_type)); 2025 } 2026 } 2027 | begin_type_declaration_specifiers end_type 2028 type_init_declarators T_SEMI { 2029 if (dcs->d_nonempty_decl) { 2030 /* '%s' declared in argument declaration list */ 2031 warning(3, type_name(dcs->d_type)); 2032 } 2033 } 2034 | begin_type_declmods error 2035 | begin_type_declaration_specifiers error 2036 ; 2037 2038 gcc_attribute_list_opt: 2039 /* empty */ 2040 | gcc_attribute_list 2041 ; 2042 2043 gcc_attribute_list: 2044 gcc_attribute 2045 | gcc_attribute_list gcc_attribute 2046 ; 2047 2048 gcc_attribute: 2049 T_ATTRIBUTE T_LPAREN T_LPAREN { 2050 in_gcc_attribute = true; 2051 } gcc_attribute_spec_list { 2052 in_gcc_attribute = false; 2053 } T_RPAREN T_RPAREN 2054 ; 2055 2056 gcc_attribute_spec_list: 2057 gcc_attribute_spec 2058 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2059 ; 2060 2061 gcc_attribute_spec: 2062 /* empty */ 2063 | T_AT_ALWAYS_INLINE 2064 | T_AT_ALIAS T_LPAREN string T_RPAREN 2065 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2066 | T_AT_ALIGNED 2067 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2068 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2069 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2070 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2071 | T_AT_COLD 2072 | T_AT_COMMON 2073 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2074 | T_AT_CONSTRUCTOR 2075 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2076 | T_AT_DEPRECATED 2077 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2078 | T_AT_DESTRUCTOR 2079 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2080 | T_AT_FALLTHROUGH { 2081 fallthru(1); 2082 } 2083 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2084 constant_expr T_COMMA constant_expr T_RPAREN 2085 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2086 | T_AT_GNU_INLINE 2087 | T_AT_HOT 2088 | T_AT_MALLOC 2089 | T_AT_MAY_ALIAS 2090 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2091 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2092 | T_AT_NO_SANITIZE_THREAD 2093 | T_AT_NOINLINE 2094 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2095 | T_AT_NONNULL 2096 | T_AT_NONSTRING 2097 | T_AT_NORETURN 2098 | T_AT_NOTHROW 2099 | T_AT_NO_INSTRUMENT_FUNCTION 2100 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2101 | T_AT_OPTNONE 2102 | T_AT_PACKED { 2103 addpacked(); 2104 } 2105 | T_AT_PCS T_LPAREN string T_RPAREN 2106 | T_AT_PURE 2107 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2108 | T_AT_RETURNS_NONNULL 2109 | T_AT_RETURNS_TWICE 2110 | T_AT_SECTION T_LPAREN string T_RPAREN 2111 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2112 | T_AT_SENTINEL 2113 | T_AT_TARGET T_LPAREN string T_RPAREN 2114 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2115 | T_AT_TUNION 2116 | T_AT_UNUSED { 2117 add_attr_used(); 2118 } 2119 | T_AT_USED { 2120 add_attr_used(); 2121 } 2122 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2123 | T_AT_WARN_UNUSED_RESULT 2124 | T_AT_WEAK 2125 | T_QUAL { 2126 if ($1 != CONST) 2127 yyerror("Bad attribute"); 2128 } 2129 ; 2130 2131 gcc_attribute_bounded: 2132 T_AT_MINBYTES 2133 | T_AT_STRING 2134 | T_AT_BUFFER 2135 ; 2136 2137 gcc_attribute_format: 2138 T_AT_FORMAT_GNU_PRINTF 2139 | T_AT_FORMAT_PRINTF 2140 | T_AT_FORMAT_SCANF 2141 | T_AT_FORMAT_STRFMON 2142 | T_AT_FORMAT_STRFTIME 2143 | T_AT_FORMAT_SYSLOG 2144 ; 2145 2146 sys: 2147 /* empty */ { 2148 $$ = in_system_header; 2149 } 2150 ; 2151 2152 %% 2153 2154 /* ARGSUSED */ 2155 int 2156 yyerror(const char *msg) 2157 { 2158 /* syntax error '%s' */ 2159 error(249, yytext); 2160 if (++sytxerr >= 5) 2161 norecover(); 2162 return 0; 2163 } 2164 2165 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2166 || (defined(YYDEBUG) && defined(YYBISON)) 2167 static const char * 2168 cgram_to_string(int token, YYSTYPE val) 2169 { 2170 2171 switch (token) { 2172 case T_INCDEC: 2173 case T_MULTIPLICATIVE: 2174 case T_ADDITIVE: 2175 case T_SHIFT: 2176 case T_RELATIONAL: 2177 case T_EQUALITY: 2178 case T_OPASSIGN: 2179 return modtab[val.y_op].m_name; 2180 case T_SCLASS: 2181 return scl_name(val.y_scl); 2182 case T_TYPE: 2183 case T_STRUCT_OR_UNION: 2184 return tspec_name(val.y_tspec); 2185 case T_QUAL: 2186 return tqual_name(val.y_tqual); 2187 case T_NAME: 2188 return val.y_name->sb_name; 2189 default: 2190 return "<none>"; 2191 } 2192 } 2193 #endif 2194 2195 #if defined(YYDEBUG) && defined(YYBISON) 2196 static inline void 2197 cgram_print(FILE *output, int token, YYSTYPE val) 2198 { 2199 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2200 } 2201 #endif 2202 2203 static void 2204 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2205 { 2206 declare(decl, initflg, renaming); 2207 if (renaming != NULL) 2208 freeyyv(&renaming, T_NAME); 2209 } 2210 2211 /* 2212 * Discard all input tokens up to and including the next 2213 * unmatched right paren 2214 */ 2215 static void 2216 read_until_rparen(void) 2217 { 2218 int level; 2219 2220 if (yychar < 0) 2221 yychar = yylex(); 2222 freeyyv(&yylval, yychar); 2223 2224 level = 1; 2225 while (yychar != T_RPAREN || --level > 0) { 2226 if (yychar == T_LPAREN) { 2227 level++; 2228 } else if (yychar <= 0) { 2229 break; 2230 } 2231 freeyyv(&yylval, yychar = yylex()); 2232 } 2233 2234 yyclearin; 2235 } 2236 2237 static sym_t * 2238 symbolrename(sym_t *s, sbuf_t *sb) 2239 { 2240 if (sb != NULL) 2241 s->s_rename = sb->sb_name; 2242 return s; 2243 } 2244
Indexes created Fri Oct 03 02:09:57 GMT 2025