cgram.y revision 1.378
1 %{ 2 /* $NetBSD: cgram.y,v 1.378 2021/12/26 18:16:41 christos 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 1.378 2021/12/26 18:16:41 christos Exp $"); 39 #endif 40 41 #include <limits.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "lint1.h" 46 47 extern char *yytext; 48 49 /* 50 * Contains the level of current declaration, used for symbol table entries. 51 * 0 is the top-level, > 0 is inside a function body. 52 */ 53 int block_level; 54 55 /* 56 * level for memory allocation. Normally the same as block_level. 57 * An exception is the declaration of arguments in prototypes. Memory 58 * for these can't be freed after the declaration, but symbols must 59 * be removed from the symbol table after the declaration. 60 */ 61 int mem_block_level; 62 63 /* 64 * Save the no-warns state and restore it to avoid the problem where 65 * if (expr) { stmt } / * NOLINT * / stmt; 66 */ 67 static int olwarn = LWARN_BAD; 68 69 static void cgram_declare(sym_t *, bool, sbuf_t *); 70 static void 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->s_styp = 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 %type <y_string> string2 296 297 %type <y_tnode> primary_expression 298 %type <y_tnode> generic_selection 299 %type <y_generic> generic_assoc_list 300 %type <y_generic> generic_association 301 %type <y_tnode> postfix_expression 302 %type <y_tnode> gcc_statement_expr_list 303 %type <y_tnode> gcc_statement_expr_item 304 %type <y_op> point_or_arrow 305 %type <y_tnode> argument_expression_list 306 %type <y_tnode> unary_expression 307 %type <y_tnode> cast_expression 308 %type <y_tnode> conditional_expression 309 %type <y_tnode> assignment_expression 310 %type <y_tnode> expression_opt 311 %type <y_tnode> expression 312 %type <y_tnode> constant_expr 313 314 %type <y_type> begin_type_typespec 315 %type <y_type> type_specifier 316 %type <y_type> notype_type_specifier 317 %type <y_type> struct_or_union_specifier 318 %type <y_tspec> struct_or_union 319 %type <y_sym> braced_struct_declaration_list 320 %type <y_sym> struct_declaration_list_with_rbrace 321 %type <y_sym> struct_declaration_list 322 %type <y_sym> struct_declaration 323 %type <y_sym> notype_struct_declarators 324 %type <y_sym> type_struct_declarators 325 %type <y_sym> notype_struct_declarator 326 %type <y_sym> type_struct_declarator 327 %type <y_type> enum_specifier 328 %type <y_sym> enum_declaration 329 %type <y_sym> enums_with_opt_comma 330 %type <y_sym> enumerator_list 331 %type <y_sym> enumerator 332 %type <y_qual_ptr> type_qualifier 333 %type <y_qual_ptr> pointer 334 %type <y_qual_ptr> asterisk 335 %type <y_qual_ptr> type_qualifier_list_opt 336 %type <y_qual_ptr> type_qualifier_list 337 %type <y_sym> notype_declarator 338 %type <y_sym> type_declarator 339 %type <y_sym> notype_direct_declarator 340 %type <y_sym> type_direct_declarator 341 %type <y_sym> type_param_declarator 342 %type <y_sym> notype_param_declarator 343 %type <y_sym> direct_param_declarator 344 %type <y_sym> direct_notype_param_declarator 345 %type <y_sym> param_list 346 %type <y_array_size> array_size_opt 347 %type <y_tnode> array_size 348 %type <y_sym> identifier_list 349 %type <y_type> type_name 350 %type <y_sym> abstract_declaration 351 %type <y_sym> abstract_declarator 352 %type <y_sym> direct_abstract_declarator 353 %type <y_sym> abstract_decl_param_list 354 %type <y_sym> vararg_parameter_type_list 355 %type <y_sym> parameter_type_list 356 %type <y_sym> parameter_declaration 357 %type <y_range> range 358 %type <y_name> asm_or_symbolrename_opt 359 360 %type <y_seen_statement> block_item_list 361 %type <y_seen_statement> block_item 362 %type <y_tnode> do_while_expr 363 %type <y_sym> func_declarator 364 %type <y_in_system_header> sys 365 366 %{ 367 #if defined(YYDEBUG) && defined(YYBISON) 368 static inline void cgram_print(FILE *, int, YYSTYPE); 369 #endif 370 %} 371 372 %% 373 374 program: 375 /* empty */ { 376 if (sflag) { 377 /* empty translation unit */ 378 error(272); 379 } else if (!tflag) { 380 /* empty translation unit */ 381 warning(272); 382 } 383 } 384 | translation_unit 385 ; 386 387 identifier_sym: /* helper for struct/union/enum */ 388 identifier { 389 $$ = getsym($1); 390 } 391 ; 392 393 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 394 identifier: 395 T_NAME { 396 debug_step("cgram: name '%s'", $1->sb_name); 397 $$ = $1; 398 } 399 | T_TYPENAME { 400 debug_step("cgram: typename '%s'", $1->sb_name); 401 $$ = $1; 402 } 403 ; 404 405 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 406 string: 407 T_STRING 408 | T_STRING string2 { 409 $$ = cat_strings($1, $2); 410 } 411 ; 412 413 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 414 string2: 415 T_STRING { 416 if (tflag) { 417 /* concatenated strings are illegal in traditional C */ 418 warning(219); 419 } 420 $$ = $1; 421 } 422 | string2 T_STRING { 423 $$ = cat_strings($1, $2); 424 } 425 ; 426 427 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 428 primary_expression: 429 T_NAME { 430 bool sys_name, sys_next; 431 sys_name = in_system_header; 432 if (yychar < 0) 433 yychar = yylex(); 434 sys_next = in_system_header; 435 in_system_header = sys_name; 436 $$ = build_name(getsym($1), yychar == T_LPAREN); 437 in_system_header = sys_next; 438 } 439 | T_CON { 440 $$ = build_constant(gettyp($1->v_tspec), $1); 441 } 442 | string { 443 $$ = build_string($1); 444 } 445 | T_LPAREN expression T_RPAREN { 446 if ($2 != NULL) 447 $2->tn_parenthesized = true; 448 $$ = $2; 449 } 450 | generic_selection 451 /* GCC primary-expression, see c_parser_postfix_expression */ 452 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 453 symtyp = FMEMBER; 454 $$ = build_offsetof($3, getsym($5)); 455 } 456 ; 457 458 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 459 generic_selection: 460 T_GENERIC T_LPAREN assignment_expression T_COMMA 461 generic_assoc_list T_RPAREN { 462 /* generic selection requires C11 or later */ 463 c11ism(345); 464 $$ = build_generic_selection($3, $5); 465 } 466 ; 467 468 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 469 generic_assoc_list: 470 generic_association 471 | generic_assoc_list T_COMMA generic_association { 472 $3->ga_prev = $1; 473 $$ = $3; 474 } 475 ; 476 477 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 478 generic_association: 479 type_name T_COLON assignment_expression { 480 $$ = getblk(sizeof(*$$)); 481 $$->ga_arg = $1; 482 $$->ga_result = $3; 483 } 484 | T_DEFAULT T_COLON assignment_expression { 485 $$ = getblk(sizeof(*$$)); 486 $$->ga_arg = NULL; 487 $$->ga_result = $3; 488 } 489 ; 490 491 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 492 postfix_expression: 493 primary_expression 494 | postfix_expression T_LBRACK sys expression T_RBRACK { 495 $$ = build_unary(INDIR, $3, build_binary($1, PLUS, $3, $4)); 496 } 497 | postfix_expression T_LPAREN sys T_RPAREN { 498 $$ = build_function_call($1, $3, NULL); 499 } 500 | postfix_expression T_LPAREN sys argument_expression_list T_RPAREN { 501 $$ = build_function_call($1, $3, $4); 502 } 503 | postfix_expression point_or_arrow sys T_NAME { 504 $$ = build_member_access($1, $2, $3, $4); 505 } 506 | postfix_expression T_INCDEC sys { 507 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $3, $1); 508 } 509 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 510 sym_t *tmp = mktempsym($2); 511 begin_initialization(tmp); 512 cgram_declare(tmp, true, NULL); 513 } init_lbrace initializer_list comma_opt init_rbrace { 514 if (!Sflag) 515 /* compound literals are a C9X/GCC extension */ 516 gnuism(319); 517 $$ = build_name(*current_initsym(), false); 518 end_initialization(); 519 } 520 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 521 block_level--; 522 mem_block_level--; 523 begin_initialization(mktempsym(dup_type($3->tn_type))); 524 mem_block_level++; 525 block_level++; 526 /* ({ }) is a GCC extension */ 527 gnuism(320); 528 } compound_statement_rbrace T_RPAREN { 529 $$ = build_name(*current_initsym(), false); 530 end_initialization(); 531 } 532 ; 533 534 comma_opt: /* helper for 'postfix_expression' */ 535 /* empty */ 536 | T_COMMA 537 ; 538 539 /* 540 * The inner part of a GCC statement-expression of the form ({ ... }). 541 * 542 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 543 */ 544 gcc_statement_expr_list: 545 gcc_statement_expr_item 546 | gcc_statement_expr_list gcc_statement_expr_item { 547 $$ = $2; 548 } 549 ; 550 551 gcc_statement_expr_item: 552 declaration_or_error { 553 clear_warning_flags(); 554 $$ = NULL; 555 } 556 | non_expr_statement { 557 $$ = expr_zalloc_tnode(); 558 $$->tn_type = gettyp(VOID); 559 } 560 | expression T_SEMI { 561 if ($1 == NULL) { /* in case of syntax errors */ 562 $$ = expr_zalloc_tnode(); 563 $$->tn_type = gettyp(VOID); 564 } else { 565 /* XXX: do that only on the last name */ 566 if ($1->tn_op == NAME) 567 $1->tn_sym->s_used = true; 568 expr($1, false, false, false, false); 569 seen_fallthrough = false; 570 $$ = $1; 571 } 572 } 573 ; 574 575 point_or_arrow: /* helper for 'postfix_expression' */ 576 T_POINT { 577 symtyp = FMEMBER; 578 $$ = POINT; 579 } 580 | T_ARROW { 581 symtyp = FMEMBER; 582 $$ = ARROW; 583 } 584 ; 585 586 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 587 argument_expression_list: 588 assignment_expression { 589 $$ = build_function_argument(NULL, $1); 590 } 591 | argument_expression_list T_COMMA assignment_expression { 592 $$ = build_function_argument($1, $3); 593 } 594 ; 595 596 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 597 unary_expression: 598 postfix_expression 599 | T_INCDEC sys unary_expression { 600 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2, $3); 601 } 602 | T_AMPER sys cast_expression { 603 $$ = build_unary(ADDR, $2, $3); 604 } 605 | T_ASTERISK sys cast_expression { 606 $$ = build_unary(INDIR, $2, $3); 607 } 608 | T_ADDITIVE sys cast_expression { 609 if (tflag && $1 == PLUS) { 610 /* unary + is illegal in traditional C */ 611 warning(100); 612 } 613 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2, $3); 614 } 615 | T_COMPLEMENT sys cast_expression { 616 $$ = build_unary(COMPL, $2, $3); 617 } 618 | T_LOGNOT sys cast_expression { 619 $$ = build_unary(NOT, $2, $3); 620 } 621 | T_REAL sys cast_expression { /* GCC c_parser_unary_expression */ 622 $$ = build_unary(REAL, $2, $3); 623 } 624 | T_IMAG sys cast_expression { /* GCC c_parser_unary_expression */ 625 $$ = build_unary(IMAG, $2, $3); 626 } 627 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 628 $$ = $2; 629 } 630 | T_SIZEOF unary_expression { 631 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 632 if ($$ != NULL) 633 check_expr_misc($2, 634 false, false, false, false, false, true); 635 } 636 | T_SIZEOF T_LPAREN type_name T_RPAREN { 637 $$ = build_sizeof($3); 638 } 639 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 640 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 641 /* TODO: c11ism */ 642 $$ = build_alignof($3); 643 } 644 ; 645 646 /* The rule 'unary_operator' is inlined into unary_expression. */ 647 648 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 649 cast_expression: 650 unary_expression 651 | T_LPAREN type_name T_RPAREN cast_expression { 652 $$ = cast($4, $2); 653 } 654 ; 655 656 expression_opt: 657 /* empty */ { 658 $$ = NULL; 659 } 660 | expression 661 ; 662 663 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 664 /* 'conditional_expression' also implements 'additive_expression'. */ 665 /* 'conditional_expression' also implements 'shift_expression'. */ 666 /* 'conditional_expression' also implements 'relational_expression'. */ 667 /* 'conditional_expression' also implements 'equality_expression'. */ 668 /* 'conditional_expression' also implements 'AND_expression'. */ 669 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 670 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 671 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 672 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 673 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 674 conditional_expression: 675 cast_expression 676 | conditional_expression T_ASTERISK sys conditional_expression { 677 $$ = build_binary($1, MULT, $3, $4); 678 } 679 | conditional_expression T_MULTIPLICATIVE sys conditional_expression { 680 $$ = build_binary($1, $2, $3, $4); 681 } 682 | conditional_expression T_ADDITIVE sys conditional_expression { 683 $$ = build_binary($1, $2, $3, $4); 684 } 685 | conditional_expression T_SHIFT sys conditional_expression { 686 $$ = build_binary($1, $2, $3, $4); 687 } 688 | conditional_expression T_RELATIONAL sys conditional_expression { 689 $$ = build_binary($1, $2, $3, $4); 690 } 691 | conditional_expression T_EQUALITY sys conditional_expression { 692 $$ = build_binary($1, $2, $3, $4); 693 } 694 | conditional_expression T_AMPER sys conditional_expression { 695 $$ = build_binary($1, BITAND, $3, $4); 696 } 697 | conditional_expression T_BITXOR sys conditional_expression { 698 $$ = build_binary($1, BITXOR, $3, $4); 699 } 700 | conditional_expression T_BITOR sys conditional_expression { 701 $$ = build_binary($1, BITOR, $3, $4); 702 } 703 | conditional_expression T_LOGAND sys conditional_expression { 704 $$ = build_binary($1, LOGAND, $3, $4); 705 } 706 | conditional_expression T_LOGOR sys conditional_expression { 707 $$ = build_binary($1, LOGOR, $3, $4); 708 } 709 | conditional_expression T_QUEST sys 710 expression T_COLON sys conditional_expression { 711 $$ = build_binary($1, QUEST, $3, 712 build_binary($4, COLON, $6, $7)); 713 } 714 ; 715 716 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 717 assignment_expression: 718 conditional_expression 719 | unary_expression T_ASSIGN sys assignment_expression { 720 $$ = build_binary($1, ASSIGN, $3, $4); 721 } 722 | unary_expression T_OPASSIGN sys assignment_expression { 723 $$ = build_binary($1, $2, $3, $4); 724 } 725 ; 726 727 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 728 expression: 729 assignment_expression 730 | expression T_COMMA sys assignment_expression { 731 $$ = build_binary($1, COMMA, $3, $4); 732 } 733 ; 734 735 constant_expr_list_opt: /* helper for gcc_attribute */ 736 /* empty */ 737 | constant_expr_list 738 ; 739 740 constant_expr_list: /* helper for gcc_attribute */ 741 constant_expr 742 | constant_expr_list T_COMMA constant_expr 743 ; 744 745 constant_expr: /* C99 6.6 */ 746 conditional_expression 747 ; 748 749 declaration_or_error: 750 declaration 751 | error T_SEMI 752 ; 753 754 declaration: /* C99 6.7 */ 755 begin_type_declmods end_type T_SEMI { 756 if (dcs->d_scl == TYPEDEF) { 757 /* typedef declares no type name */ 758 warning(72); 759 } else { 760 /* empty declaration */ 761 warning(2); 762 } 763 } 764 | begin_type_declmods end_type notype_init_declarators T_SEMI 765 /* ^^ There is no check for the missing type-specifier. */ 766 | begin_type_declaration_specifiers end_type T_SEMI { 767 if (dcs->d_scl == TYPEDEF) { 768 /* typedef declares no type name */ 769 warning(72); 770 } else if (!dcs->d_nonempty_decl) { 771 /* empty declaration */ 772 warning(2); 773 } 774 } 775 | begin_type_declaration_specifiers end_type 776 type_init_declarators T_SEMI 777 | static_assert_declaration 778 ; 779 780 begin_type_declaration_specifiers: /* see C99 6.7 */ 781 begin_type_typespec { 782 add_type($1); 783 } 784 | begin_type_declmods type_specifier { 785 add_type($2); 786 } 787 | type_attribute begin_type_declaration_specifiers 788 | begin_type_declaration_specifiers declmod 789 | begin_type_declaration_specifiers notype_type_specifier { 790 add_type($2); 791 } 792 ; 793 794 begin_type_declmods: /* see C99 6.7 */ 795 begin_type T_QUAL { 796 add_qualifier($2); 797 } 798 | begin_type T_SCLASS { 799 add_storage_class($2); 800 } 801 | begin_type_declmods declmod 802 ; 803 804 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 805 begin_type_specifier_qualifier_list_postfix 806 | type_attribute_list begin_type_specifier_qualifier_list_postfix 807 ; 808 809 begin_type_specifier_qualifier_list_postfix: 810 begin_type_typespec { 811 add_type($1); 812 } 813 | begin_type_qualifier_list type_specifier { 814 add_type($2); 815 } 816 | begin_type_specifier_qualifier_list_postfix T_QUAL { 817 add_qualifier($2); 818 } 819 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 820 add_type($2); 821 } 822 | begin_type_specifier_qualifier_list_postfix type_attribute 823 ; 824 825 begin_type_typespec: 826 begin_type notype_type_specifier { 827 $$ = $2; 828 } 829 | T_TYPENAME begin_type { 830 $$ = getsym($1)->s_type; 831 } 832 ; 833 834 begin_type_qualifier_list: 835 begin_type T_QUAL { 836 add_qualifier($2); 837 } 838 | begin_type_qualifier_list T_QUAL { 839 add_qualifier($2); 840 } 841 ; 842 843 declmod: 844 T_QUAL { 845 add_qualifier($1); 846 } 847 | T_SCLASS { 848 add_storage_class($1); 849 } 850 | type_attribute_list 851 ; 852 853 type_attribute_list: 854 type_attribute 855 | type_attribute_list type_attribute 856 ; 857 858 type_attribute_opt: 859 /* empty */ 860 | type_attribute 861 ; 862 863 type_attribute: /* See C11 6.7 declaration-specifiers */ 864 gcc_attribute 865 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 866 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 867 | T_PACKED { 868 addpacked(); 869 } 870 | T_NORETURN 871 ; 872 873 begin_type: 874 /* empty */ { 875 begin_type(); 876 } 877 ; 878 879 end_type: 880 /* empty */ { 881 end_type(); 882 } 883 ; 884 885 type_specifier: /* C99 6.7.2 */ 886 notype_type_specifier 887 | T_TYPENAME { 888 $$ = getsym($1)->s_type; 889 } 890 ; 891 892 notype_type_specifier: /* see C99 6.7.2 */ 893 T_TYPE { 894 $$ = gettyp($1); 895 } 896 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 897 $$ = $3->tn_type; 898 } 899 | struct_or_union_specifier { 900 end_declaration_level(); 901 $$ = $1; 902 } 903 | enum_specifier { 904 end_declaration_level(); 905 $$ = $1; 906 } 907 ; 908 909 struct_or_union_specifier: /* C99 6.7.2.1 */ 910 struct_or_union identifier_sym { 911 /* 912 * STDC requires that "struct a;" always introduces 913 * a new tag if "a" is not declared at current level 914 * 915 * yychar is valid because otherwise the parser would not 916 * have been able to decide if it must shift or reduce 917 */ 918 $$ = mktag($2, $1, false, yychar == T_SEMI); 919 } 920 | struct_or_union identifier_sym { 921 dcs->d_tagtyp = mktag($2, $1, true, false); 922 } braced_struct_declaration_list { 923 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 924 } 925 | struct_or_union { 926 dcs->d_tagtyp = mktag(NULL, $1, true, false); 927 } braced_struct_declaration_list { 928 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 929 } 930 | struct_or_union error { 931 symtyp = FVFT; 932 $$ = gettyp(INT); 933 } 934 ; 935 936 struct_or_union: /* C99 6.7.2.1 */ 937 T_STRUCT_OR_UNION { 938 symtyp = FTAG; 939 begin_declaration_level($1 == STRUCT ? MOS : MOU); 940 dcs->d_offset = 0; 941 dcs->d_sou_align_in_bits = CHAR_SIZE; 942 $$ = $1; 943 } 944 | struct_or_union type_attribute 945 ; 946 947 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 948 struct_declaration_lbrace struct_declaration_list_with_rbrace { 949 $$ = $2; 950 } 951 ; 952 953 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 954 T_LBRACE { 955 symtyp = FVFT; 956 } 957 ; 958 959 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 960 struct_declaration_list T_RBRACE 961 | T_RBRACE { 962 /* XXX: This is not allowed by any C standard. */ 963 $$ = NULL; 964 } 965 ; 966 967 struct_declaration_list: /* C99 6.7.2.1 */ 968 struct_declaration 969 | struct_declaration_list struct_declaration { 970 $$ = lnklst($1, $2); 971 } 972 ; 973 974 struct_declaration: /* C99 6.7.2.1 */ 975 begin_type_qualifier_list end_type { 976 /* ^^ There is no check for the missing type-specifier. */ 977 /* too late, i know, but getsym() compensates it */ 978 symtyp = FMEMBER; 979 } notype_struct_declarators type_attribute_opt T_SEMI { 980 symtyp = FVFT; 981 $$ = $4; 982 } 983 | begin_type_specifier_qualifier_list end_type { 984 symtyp = FMEMBER; 985 } type_struct_declarators type_attribute_opt T_SEMI { 986 symtyp = FVFT; 987 $$ = $4; 988 } 989 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 990 /* syntax error '%s' */ 991 error(249, "member without type"); 992 $$ = NULL; 993 } 994 | begin_type_specifier_qualifier_list end_type type_attribute_opt 995 T_SEMI { 996 symtyp = FVFT; 997 if (!Sflag) 998 /* anonymous struct/union members is a C9X feature */ 999 warning(49); 1000 if (is_struct_or_union(dcs->d_type->t_tspec)) { 1001 $$ = dcs->d_type->t_str->sou_first_member; 1002 /* add all the members of the anonymous struct/union */ 1003 anonymize($$); 1004 } else { 1005 /* syntax error '%s' */ 1006 error(249, "unnamed member"); 1007 $$ = NULL; 1008 } 1009 } 1010 | static_assert_declaration { 1011 $$ = NULL; 1012 } 1013 | error T_SEMI { 1014 symtyp = FVFT; 1015 $$ = NULL; 1016 } 1017 ; 1018 1019 notype_struct_declarators: 1020 notype_struct_declarator { 1021 $$ = declarator_1_struct_union($1); 1022 } 1023 | notype_struct_declarators { 1024 symtyp = FMEMBER; 1025 } T_COMMA type_struct_declarator { 1026 $$ = lnklst($1, declarator_1_struct_union($4)); 1027 } 1028 ; 1029 1030 type_struct_declarators: 1031 type_struct_declarator { 1032 $$ = declarator_1_struct_union($1); 1033 } 1034 | type_struct_declarators { 1035 symtyp = FMEMBER; 1036 } T_COMMA type_struct_declarator { 1037 $$ = lnklst($1, declarator_1_struct_union($4)); 1038 } 1039 ; 1040 1041 notype_struct_declarator: 1042 notype_declarator 1043 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1044 $$ = bitfield($1, to_int_constant($3, true)); 1045 } 1046 | { 1047 symtyp = FVFT; 1048 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1049 $$ = bitfield(NULL, to_int_constant($3, true)); 1050 } 1051 ; 1052 1053 type_struct_declarator: 1054 type_declarator 1055 | type_declarator T_COLON constant_expr { 1056 $$ = bitfield($1, to_int_constant($3, true)); 1057 } 1058 | { 1059 symtyp = FVFT; 1060 } T_COLON constant_expr { 1061 $$ = bitfield(NULL, to_int_constant($3, true)); 1062 } 1063 ; 1064 1065 enum_specifier: /* C99 6.7.2.2 */ 1066 enum gcc_attribute_list_opt identifier_sym { 1067 $$ = mktag($3, ENUM, false, false); 1068 } 1069 | enum gcc_attribute_list_opt identifier_sym { 1070 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1071 } enum_declaration /*gcc_attribute_list_opt*/ { 1072 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1073 } 1074 | enum gcc_attribute_list_opt { 1075 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1076 } enum_declaration /*gcc_attribute_list_opt*/ { 1077 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1078 } 1079 | enum error { 1080 symtyp = FVFT; 1081 $$ = gettyp(INT); 1082 } 1083 ; 1084 1085 enum: /* helper for C99 6.7.2.2 */ 1086 T_ENUM { 1087 symtyp = FTAG; 1088 begin_declaration_level(CTCONST); 1089 } 1090 ; 1091 1092 enum_declaration: /* helper for C99 6.7.2.2 */ 1093 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1094 $$ = $2; 1095 } 1096 ; 1097 1098 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1099 T_LBRACE { 1100 symtyp = FVFT; 1101 enumval = 0; 1102 } 1103 ; 1104 1105 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1106 enumerator_list 1107 | enumerator_list T_COMMA { 1108 if (sflag) { 1109 /* trailing ',' prohibited in enum declaration */ 1110 error(54); 1111 } else { 1112 /* trailing ',' prohibited in enum declaration */ 1113 c99ism(54); 1114 } 1115 $$ = $1; 1116 } 1117 ; 1118 1119 enumerator_list: /* C99 6.7.2.2 */ 1120 enumerator 1121 | enumerator_list T_COMMA enumerator { 1122 $$ = lnklst($1, $3); 1123 } 1124 | error { 1125 $$ = NULL; 1126 } 1127 ; 1128 1129 enumerator: /* C99 6.7.2.2 */ 1130 identifier_sym gcc_attribute_list_opt { 1131 $$ = enumeration_constant($1, enumval, true); 1132 } 1133 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1134 $$ = enumeration_constant($1, to_int_constant($4, true), 1135 false); 1136 } 1137 ; 1138 1139 type_qualifier: /* C99 6.7.3 */ 1140 T_QUAL { 1141 $$ = xcalloc(1, sizeof(*$$)); 1142 if ($1 == CONST) 1143 $$->p_const = true; 1144 if ($1 == VOLATILE) 1145 $$->p_volatile = true; 1146 } 1147 ; 1148 1149 pointer: /* C99 6.7.5 */ 1150 asterisk type_qualifier_list_opt { 1151 $$ = merge_qualified_pointer($1, $2); 1152 } 1153 | asterisk type_qualifier_list_opt pointer { 1154 $$ = merge_qualified_pointer($1, $2); 1155 $$ = merge_qualified_pointer($$, $3); 1156 } 1157 ; 1158 1159 asterisk: /* helper for 'pointer' */ 1160 T_ASTERISK { 1161 $$ = xcalloc(1, sizeof(*$$)); 1162 $$->p_pointer = true; 1163 } 1164 ; 1165 1166 type_qualifier_list_opt: /* see C99 6.7.5 */ 1167 /* empty */ { 1168 $$ = NULL; 1169 } 1170 | type_qualifier_list 1171 ; 1172 1173 type_qualifier_list: /* C99 6.7.5 */ 1174 type_qualifier 1175 | type_qualifier_list type_qualifier { 1176 $$ = merge_qualified_pointer($1, $2); 1177 } 1178 ; 1179 1180 /* 1181 * For an explanation of 'notype' in the following rules, see 1182 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1183 */ 1184 1185 notype_init_declarators: 1186 notype_init_declarator 1187 | notype_init_declarators T_COMMA type_init_declarator 1188 ; 1189 1190 type_init_declarators: 1191 type_init_declarator 1192 | type_init_declarators T_COMMA type_init_declarator 1193 ; 1194 1195 notype_init_declarator: 1196 notype_declarator asm_or_symbolrename_opt { 1197 cgram_declare($1, false, $2); 1198 check_size($1); 1199 } 1200 | notype_declarator asm_or_symbolrename_opt { 1201 begin_initialization($1); 1202 cgram_declare($1, true, $2); 1203 } T_ASSIGN initializer { 1204 check_size($1); 1205 end_initialization(); 1206 } 1207 ; 1208 1209 type_init_declarator: 1210 type_declarator asm_or_symbolrename_opt { 1211 cgram_declare($1, false, $2); 1212 check_size($1); 1213 } 1214 | type_declarator asm_or_symbolrename_opt { 1215 begin_initialization($1); 1216 cgram_declare($1, true, $2); 1217 } T_ASSIGN initializer { 1218 check_size($1); 1219 end_initialization(); 1220 } 1221 ; 1222 1223 notype_declarator: 1224 notype_direct_declarator 1225 | pointer notype_direct_declarator { 1226 $$ = add_pointer($2, $1); 1227 } 1228 ; 1229 1230 type_declarator: 1231 type_direct_declarator 1232 | pointer type_direct_declarator { 1233 $$ = add_pointer($2, $1); 1234 } 1235 ; 1236 1237 notype_direct_declarator: 1238 T_NAME { 1239 $$ = declarator_name(getsym($1)); 1240 } 1241 | T_LPAREN type_declarator T_RPAREN { 1242 $$ = $2; 1243 } 1244 | type_attribute notype_direct_declarator { 1245 $$ = $2; 1246 } 1247 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1248 $$ = add_array($1, $3.has_dim, $3.dim); 1249 } 1250 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1251 $$ = add_function(symbolrename($1, $3), $2); 1252 end_declaration_level(); 1253 block_level--; 1254 } 1255 | notype_direct_declarator type_attribute 1256 ; 1257 1258 type_direct_declarator: 1259 identifier { 1260 $$ = declarator_name(getsym($1)); 1261 } 1262 | T_LPAREN type_declarator T_RPAREN { 1263 $$ = $2; 1264 } 1265 | type_attribute type_direct_declarator { 1266 $$ = $2; 1267 } 1268 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1269 $$ = add_array($1, $3.has_dim, $3.dim); 1270 } 1271 | type_direct_declarator param_list asm_or_symbolrename_opt { 1272 $$ = add_function(symbolrename($1, $3), $2); 1273 end_declaration_level(); 1274 block_level--; 1275 } 1276 | type_direct_declarator type_attribute 1277 ; 1278 1279 /* 1280 * The two distinct rules type_param_declarator and notype_param_declarator 1281 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1282 * always treated as a typename, not an argument name. For example, after 1283 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1284 * "f(int (double));", not "f(int a);". 1285 */ 1286 type_param_declarator: 1287 direct_param_declarator 1288 | pointer direct_param_declarator { 1289 $$ = add_pointer($2, $1); 1290 } 1291 ; 1292 1293 notype_param_declarator: 1294 direct_notype_param_declarator 1295 | pointer direct_notype_param_declarator { 1296 $$ = add_pointer($2, $1); 1297 } 1298 ; 1299 1300 direct_param_declarator: 1301 identifier type_attribute_list { 1302 $$ = declarator_name(getsym($1)); 1303 } 1304 | identifier { 1305 $$ = declarator_name(getsym($1)); 1306 } 1307 | T_LPAREN notype_param_declarator T_RPAREN { 1308 $$ = $2; 1309 } 1310 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1311 gcc_attribute_list_opt { 1312 $$ = add_array($1, $3.has_dim, $3.dim); 1313 } 1314 | direct_param_declarator param_list asm_or_symbolrename_opt { 1315 $$ = add_function(symbolrename($1, $3), $2); 1316 end_declaration_level(); 1317 block_level--; 1318 } 1319 ; 1320 1321 direct_notype_param_declarator: 1322 identifier { 1323 $$ = declarator_name(getsym($1)); 1324 } 1325 | T_LPAREN notype_param_declarator T_RPAREN { 1326 $$ = $2; 1327 } 1328 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1329 $$ = add_array($1, $3.has_dim, $3.dim); 1330 } 1331 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1332 $$ = add_function(symbolrename($1, $3), $2); 1333 end_declaration_level(); 1334 block_level--; 1335 } 1336 ; 1337 1338 param_list: 1339 id_list_lparen identifier_list T_RPAREN { 1340 $$ = $2; 1341 } 1342 | abstract_decl_param_list 1343 ; 1344 1345 id_list_lparen: 1346 T_LPAREN { 1347 block_level++; 1348 begin_declaration_level(PROTO_ARG); 1349 } 1350 ; 1351 1352 array_size_opt: 1353 /* empty */ { 1354 $$.has_dim = false; 1355 $$.dim = 0; 1356 } 1357 | T_ASTERISK { 1358 /* since C99; variable length array of unspecified size */ 1359 $$.has_dim = false; /* TODO: maybe change to true */ 1360 $$.dim = 0; /* just as a placeholder */ 1361 } 1362 | array_size { 1363 $$.has_dim = true; 1364 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1365 } 1366 ; 1367 1368 array_size: 1369 type_qualifier_list_opt T_SCLASS constant_expr { 1370 /* C11 6.7.6.3p7 */ 1371 if ($2 != STATIC) 1372 yyerror("Bad attribute"); 1373 /* static array size is a C11 extension */ 1374 c11ism(343); 1375 $$ = $3; 1376 } 1377 | T_QUAL { 1378 /* C11 6.7.6.2 */ 1379 if ($1 != RESTRICT) 1380 yyerror("Bad attribute"); 1381 $$ = NULL; 1382 } 1383 | constant_expr 1384 ; 1385 1386 identifier_list: /* C99 6.7.5 */ 1387 T_NAME { 1388 $$ = old_style_function_name(getsym($1)); 1389 } 1390 | identifier_list T_COMMA T_NAME { 1391 $$ = lnklst($1, old_style_function_name(getsym($3))); 1392 } 1393 | identifier_list error 1394 ; 1395 1396 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1397 type_name: /* C99 6.7.6 */ 1398 { 1399 begin_declaration_level(ABSTRACT); 1400 } abstract_declaration { 1401 end_declaration_level(); 1402 $$ = $2->s_type; 1403 } 1404 ; 1405 1406 abstract_declaration: /* specific to lint */ 1407 begin_type_qualifier_list end_type { 1408 $$ = declare_1_abstract(abstract_name()); 1409 } 1410 | begin_type_specifier_qualifier_list end_type { 1411 $$ = declare_1_abstract(abstract_name()); 1412 } 1413 | begin_type_qualifier_list end_type abstract_declarator { 1414 $$ = declare_1_abstract($3); 1415 } 1416 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1417 $$ = declare_1_abstract($3); 1418 } 1419 ; 1420 1421 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1422 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1423 abstract_declarator: 1424 pointer { 1425 $$ = add_pointer(abstract_name(), $1); 1426 } 1427 | direct_abstract_declarator 1428 | pointer direct_abstract_declarator { 1429 $$ = add_pointer($2, $1); 1430 } 1431 ; 1432 1433 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1434 direct_abstract_declarator: 1435 /* TODO: sort rules according to C99 */ 1436 T_LPAREN abstract_declarator T_RPAREN { 1437 $$ = $2; 1438 } 1439 | T_LBRACK array_size_opt T_RBRACK { 1440 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1441 } 1442 | type_attribute direct_abstract_declarator { 1443 $$ = $2; 1444 } 1445 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1446 $$ = add_array($1, $3.has_dim, $3.dim); 1447 } 1448 | abstract_decl_param_list asm_or_symbolrename_opt { 1449 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1450 end_declaration_level(); 1451 block_level--; 1452 } 1453 | direct_abstract_declarator abstract_decl_param_list 1454 asm_or_symbolrename_opt { 1455 $$ = add_function(symbolrename($1, $3), $2); 1456 end_declaration_level(); 1457 block_level--; 1458 } 1459 | direct_abstract_declarator type_attribute_list 1460 ; 1461 1462 abstract_decl_param_list: /* specific to lint */ 1463 abstract_decl_lparen T_RPAREN type_attribute_opt { 1464 $$ = NULL; 1465 } 1466 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1467 type_attribute_opt { 1468 dcs->d_proto = true; 1469 $$ = $2; 1470 } 1471 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1472 $$ = NULL; 1473 } 1474 ; 1475 1476 abstract_decl_lparen: /* specific to lint */ 1477 T_LPAREN { 1478 block_level++; 1479 begin_declaration_level(PROTO_ARG); 1480 } 1481 ; 1482 1483 vararg_parameter_type_list: /* specific to lint */ 1484 parameter_type_list 1485 | parameter_type_list T_COMMA T_ELLIPSIS { 1486 dcs->d_vararg = true; 1487 $$ = $1; 1488 } 1489 | T_ELLIPSIS { 1490 if (sflag) { 1491 /* ANSI C requires formal parameter before '...' */ 1492 error(84); 1493 } else if (!tflag) { 1494 /* ANSI C requires formal parameter before '...' */ 1495 warning(84); 1496 } 1497 dcs->d_vararg = true; 1498 $$ = NULL; 1499 } 1500 ; 1501 1502 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1503 parameter_type_list: 1504 parameter_declaration 1505 | parameter_type_list T_COMMA parameter_declaration { 1506 $$ = lnklst($1, $3); 1507 } 1508 ; 1509 1510 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1511 parameter_declaration: 1512 begin_type_declmods end_type { 1513 /* ^^ There is no check for the missing type-specifier. */ 1514 $$ = declare_argument(abstract_name(), false); 1515 } 1516 | begin_type_declaration_specifiers end_type { 1517 $$ = declare_argument(abstract_name(), false); 1518 } 1519 | begin_type_declmods end_type notype_param_declarator { 1520 /* ^^ There is no check for the missing type-specifier. */ 1521 $$ = declare_argument($3, false); 1522 } 1523 /* 1524 * type_param_declarator is needed because of following conflict: 1525 * "typedef int a; f(int (a));" could be parsed as 1526 * "function with argument a of type int", or 1527 * "function with an abstract argument of type function". 1528 * This grammar realizes the second case. 1529 */ 1530 | begin_type_declaration_specifiers end_type type_param_declarator { 1531 $$ = declare_argument($3, false); 1532 } 1533 | begin_type_declmods end_type abstract_declarator { 1534 /* ^^ There is no check for the missing type-specifier. */ 1535 $$ = declare_argument($3, false); 1536 } 1537 | begin_type_declaration_specifiers end_type abstract_declarator { 1538 $$ = declare_argument($3, false); 1539 } 1540 ; 1541 1542 initializer: /* C99 6.7.8 "Initialization" */ 1543 assignment_expression { 1544 init_expr($1); 1545 } 1546 | init_lbrace init_rbrace { 1547 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1548 } 1549 | init_lbrace initializer_list comma_opt init_rbrace 1550 /* XXX: What is this error handling for? */ 1551 | error 1552 ; 1553 1554 initializer_list: /* C99 6.7.8 "Initialization" */ 1555 initializer_list_item 1556 | initializer_list T_COMMA initializer_list_item 1557 ; 1558 1559 initializer_list_item: /* helper */ 1560 designation initializer 1561 | initializer 1562 ; 1563 1564 designation: /* C99 6.7.8 "Initialization" */ 1565 begin_designation designator_list T_ASSIGN 1566 | identifier T_COLON { 1567 /* GCC style struct or union member name in initializer */ 1568 gnuism(315); 1569 begin_designation(); 1570 add_designator_member($1); 1571 } 1572 ; 1573 1574 begin_designation: /* lint-specific helper */ 1575 /* empty */ { 1576 begin_designation(); 1577 } 1578 ; 1579 1580 designator_list: /* C99 6.7.8 "Initialization" */ 1581 designator 1582 | designator_list designator 1583 ; 1584 1585 designator: /* C99 6.7.8 "Initialization" */ 1586 T_LBRACK range T_RBRACK { 1587 add_designator_subscript($2); 1588 if (!Sflag) 1589 /* array initializer with designators is a C9X ... */ 1590 warning(321); 1591 } 1592 | T_POINT identifier { 1593 if (!Sflag) 1594 /* struct or union member name in initializer is ... */ 1595 warning(313); 1596 add_designator_member($2); 1597 } 1598 ; 1599 1600 static_assert_declaration: 1601 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1602 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1603 ; 1604 1605 range: 1606 constant_expr { 1607 $$.lo = to_int_constant($1, true); 1608 $$.hi = $$.lo; 1609 } 1610 | constant_expr T_ELLIPSIS constant_expr { 1611 $$.lo = to_int_constant($1, true); 1612 $$.hi = to_int_constant($3, true); 1613 /* initialization with '[a...b]' is a GCC extension */ 1614 gnuism(340); 1615 } 1616 ; 1617 1618 init_lbrace: /* helper */ 1619 T_LBRACE { 1620 init_lbrace(); 1621 } 1622 ; 1623 1624 init_rbrace: /* helper */ 1625 T_RBRACE { 1626 init_rbrace(); 1627 } 1628 ; 1629 1630 asm_or_symbolrename_opt: /* GCC extensions */ 1631 /* empty */ { 1632 $$ = NULL; 1633 } 1634 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1635 freeyyv(&$3, T_STRING); 1636 $$ = NULL; 1637 } 1638 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1639 $$ = $3; 1640 } 1641 ; 1642 1643 statement: /* C99 6.8 */ 1644 expression_statement 1645 | non_expr_statement 1646 ; 1647 1648 non_expr_statement: /* helper for C99 6.8 */ 1649 type_attribute T_SEMI 1650 | labeled_statement 1651 | compound_statement 1652 | selection_statement 1653 | iteration_statement 1654 | jump_statement { 1655 seen_fallthrough = false; 1656 } 1657 | asm_statement 1658 ; 1659 1660 labeled_statement: /* C99 6.8.1 */ 1661 label type_attribute_opt statement 1662 ; 1663 1664 label: 1665 T_NAME T_COLON { 1666 symtyp = FLABEL; 1667 named_label(getsym($1)); 1668 } 1669 | T_CASE constant_expr T_COLON { 1670 case_label($2); 1671 seen_fallthrough = true; 1672 } 1673 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1674 /* XXX: We don't fill all cases */ 1675 case_label($2); 1676 seen_fallthrough = true; 1677 } 1678 | T_DEFAULT T_COLON { 1679 default_label(); 1680 seen_fallthrough = true; 1681 } 1682 ; 1683 1684 compound_statement: /* C99 6.8.2 */ 1685 compound_statement_lbrace compound_statement_rbrace 1686 | compound_statement_lbrace block_item_list compound_statement_rbrace 1687 ; 1688 1689 compound_statement_lbrace: 1690 T_LBRACE { 1691 block_level++; 1692 mem_block_level++; 1693 begin_declaration_level(AUTO); 1694 } 1695 ; 1696 1697 compound_statement_rbrace: 1698 T_RBRACE { 1699 end_declaration_level(); 1700 freeblk(); 1701 mem_block_level--; 1702 block_level--; 1703 seen_fallthrough = false; 1704 } 1705 ; 1706 1707 block_item_list: /* C99 6.8.2 */ 1708 block_item 1709 | block_item_list block_item { 1710 if (!Sflag && $1 && !$2) 1711 /* declarations after statements is a C99 feature */ 1712 c99ism(327); 1713 $$ = $1 || $2; 1714 } 1715 ; 1716 1717 block_item: /* C99 6.8.2 */ 1718 declaration_or_error { 1719 $$ = false; 1720 restore_warning_flags(); 1721 } 1722 | statement { 1723 $$ = true; 1724 restore_warning_flags(); 1725 } 1726 ; 1727 1728 expression_statement: /* C99 6.8.3 */ 1729 expression T_SEMI { 1730 expr($1, false, false, false, false); 1731 seen_fallthrough = false; 1732 } 1733 | T_SEMI { 1734 seen_fallthrough = false; 1735 } 1736 ; 1737 1738 selection_statement: /* C99 6.8.4 */ 1739 if_without_else %prec T_THEN { 1740 save_warning_flags(); 1741 if2(); 1742 if3(false); 1743 } 1744 | if_without_else T_ELSE { 1745 save_warning_flags(); 1746 if2(); 1747 } statement { 1748 clear_warning_flags(); 1749 if3(true); 1750 } 1751 | if_without_else T_ELSE error { 1752 clear_warning_flags(); 1753 if3(false); 1754 } 1755 | switch_expr statement { 1756 clear_warning_flags(); 1757 switch2(); 1758 } 1759 | switch_expr error { 1760 clear_warning_flags(); 1761 switch2(); 1762 } 1763 ; 1764 1765 if_without_else: /* see C99 6.8.4 */ 1766 if_expr statement 1767 | if_expr error 1768 ; 1769 1770 if_expr: /* see C99 6.8.4 */ 1771 T_IF T_LPAREN expression T_RPAREN { 1772 if1($3); 1773 clear_warning_flags(); 1774 } 1775 ; 1776 1777 switch_expr: /* see C99 6.8.4 */ 1778 T_SWITCH T_LPAREN expression T_RPAREN { 1779 switch1($3); 1780 clear_warning_flags(); 1781 } 1782 ; 1783 1784 iteration_statement: /* C99 6.8.5 */ 1785 while_expr statement { 1786 clear_warning_flags(); 1787 while2(); 1788 } 1789 | while_expr error { 1790 clear_warning_flags(); 1791 while2(); 1792 } 1793 | do_statement do_while_expr { 1794 do2($2); 1795 seen_fallthrough = false; 1796 } 1797 | do error { 1798 clear_warning_flags(); 1799 do2(NULL); 1800 } 1801 | for_exprs statement { 1802 clear_warning_flags(); 1803 for2(); 1804 end_declaration_level(); 1805 block_level--; 1806 } 1807 | for_exprs error { 1808 clear_warning_flags(); 1809 for2(); 1810 end_declaration_level(); 1811 block_level--; 1812 } 1813 ; 1814 1815 while_expr: /* see C99 6.8.5 */ 1816 T_WHILE T_LPAREN expression T_RPAREN { 1817 while1($3); 1818 clear_warning_flags(); 1819 } 1820 ; 1821 1822 do_statement: /* see C99 6.8.5 */ 1823 do statement { 1824 clear_warning_flags(); 1825 } 1826 ; 1827 1828 do: /* see C99 6.8.5 */ 1829 T_DO { 1830 do1(); 1831 } 1832 ; 1833 1834 do_while_expr: /* see C99 6.8.5 */ 1835 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1836 $$ = $3; 1837 } 1838 ; 1839 1840 for_start: /* see C99 6.8.5 */ 1841 T_FOR T_LPAREN { 1842 begin_declaration_level(AUTO); 1843 block_level++; 1844 } 1845 ; 1846 1847 for_exprs: /* see C99 6.8.5 */ 1848 for_start 1849 begin_type_declaration_specifiers end_type 1850 notype_init_declarators T_SEMI 1851 expression_opt T_SEMI expression_opt T_RPAREN { 1852 /* variable declaration in for loop */ 1853 c99ism(325); 1854 for1(NULL, $6, $8); 1855 clear_warning_flags(); 1856 } 1857 | for_start 1858 expression_opt T_SEMI 1859 expression_opt T_SEMI 1860 expression_opt T_RPAREN { 1861 for1($2, $4, $6); 1862 clear_warning_flags(); 1863 } 1864 ; 1865 1866 jump_statement: /* C99 6.8.6 */ 1867 goto identifier T_SEMI { 1868 do_goto(getsym($2)); 1869 } 1870 | goto error T_SEMI { 1871 symtyp = FVFT; 1872 } 1873 | T_CONTINUE T_SEMI { 1874 do_continue(); 1875 } 1876 | T_BREAK T_SEMI { 1877 do_break(); 1878 } 1879 | T_RETURN sys T_SEMI { 1880 do_return($2, NULL); 1881 } 1882 | T_RETURN sys expression T_SEMI { 1883 do_return($2, $3); 1884 } 1885 ; 1886 1887 goto: /* see C99 6.8.6 */ 1888 T_GOTO { 1889 symtyp = FLABEL; 1890 } 1891 ; 1892 1893 asm_statement: /* GCC extension */ 1894 T_ASM T_LPAREN read_until_rparen T_SEMI { 1895 setasm(); 1896 } 1897 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1898 setasm(); 1899 } 1900 | T_ASM error 1901 ; 1902 1903 read_until_rparen: /* helper for 'asm_statement' */ 1904 /* empty */ { 1905 read_until_rparen(); 1906 } 1907 ; 1908 1909 translation_unit: /* C99 6.9 */ 1910 external_declaration 1911 | translation_unit external_declaration 1912 ; 1913 1914 external_declaration: /* C99 6.9 */ 1915 function_definition { 1916 global_clean_up_decl(false); 1917 clear_warning_flags(); 1918 } 1919 | top_level_declaration { 1920 global_clean_up_decl(false); 1921 clear_warning_flags(); 1922 } 1923 | asm_statement /* GCC extension */ 1924 | T_SEMI { /* GCC extension */ 1925 if (sflag) { 1926 /* empty declaration */ 1927 error(0); 1928 } else if (!tflag) { 1929 /* empty declaration */ 1930 warning(0); 1931 } 1932 } 1933 ; 1934 1935 /* 1936 * On the top level, lint allows several forms of declarations that it doesn't 1937 * allow in functions. For example, a single ';' is an empty declaration and 1938 * is supported by some compilers, but in a function it would be an empty 1939 * statement, not a declaration. This makes a difference in C90 mode, where 1940 * a statement must not be followed by a declaration. 1941 * 1942 * See 'declaration' for all other declarations. 1943 */ 1944 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1945 begin_type end_type notype_init_declarators T_SEMI { 1946 if (sflag) { 1947 /* old style declaration; add 'int' */ 1948 error(1); 1949 } else if (!tflag) { 1950 /* old style declaration; add 'int' */ 1951 warning(1); 1952 } 1953 } 1954 | declaration 1955 | error T_SEMI { 1956 global_clean_up(); 1957 } 1958 | error T_RBRACE { 1959 global_clean_up(); 1960 } 1961 ; 1962 1963 function_definition: /* C99 6.9.1 */ 1964 func_declarator { 1965 if ($1->s_type->t_tspec != FUNC) { 1966 /* syntax error '%s' */ 1967 error(249, yytext); 1968 YYERROR; 1969 } 1970 if ($1->s_type->t_typedef) { 1971 /* ()-less function definition */ 1972 error(64); 1973 YYERROR; 1974 } 1975 funcdef($1); 1976 block_level++; 1977 begin_declaration_level(ARG); 1978 if (lwarn == LWARN_NONE) 1979 $1->s_used = true; 1980 } arg_declaration_list_opt { 1981 end_declaration_level(); 1982 block_level--; 1983 check_func_lint_directives(); 1984 check_func_old_style_arguments(); 1985 begin_control_statement(CS_FUNCTION_BODY); 1986 } compound_statement { 1987 funcend(); 1988 end_control_statement(CS_FUNCTION_BODY); 1989 } 1990 ; 1991 1992 func_declarator: 1993 begin_type end_type notype_declarator { 1994 /* ^^ There is no check for the missing type-specifier. */ 1995 $$ = $3; 1996 } 1997 | begin_type_declmods end_type notype_declarator { 1998 /* ^^ There is no check for the missing type-specifier. */ 1999 $$ = $3; 2000 } 2001 | begin_type_declaration_specifiers end_type type_declarator { 2002 $$ = $3; 2003 } 2004 ; 2005 2006 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 2007 /* empty */ 2008 | arg_declaration_list 2009 ; 2010 2011 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2012 arg_declaration 2013 | arg_declaration_list arg_declaration 2014 /* XXX or better "arg_declaration error" ? */ 2015 | error 2016 ; 2017 2018 /* 2019 * "arg_declaration" is separated from "declaration" because it 2020 * needs other error handling. 2021 */ 2022 arg_declaration: 2023 begin_type_declmods end_type T_SEMI { 2024 /* empty declaration */ 2025 warning(2); 2026 } 2027 | begin_type_declmods end_type notype_init_declarators T_SEMI 2028 | begin_type_declaration_specifiers end_type T_SEMI { 2029 if (!dcs->d_nonempty_decl) { 2030 /* empty declaration */ 2031 warning(2); 2032 } else { 2033 /* '%s' declared in argument declaration list */ 2034 warning(3, type_name(dcs->d_type)); 2035 } 2036 } 2037 | begin_type_declaration_specifiers end_type 2038 type_init_declarators T_SEMI { 2039 if (dcs->d_nonempty_decl) { 2040 /* '%s' declared in argument declaration list */ 2041 warning(3, type_name(dcs->d_type)); 2042 } 2043 } 2044 | begin_type_declmods error 2045 | begin_type_declaration_specifiers error 2046 ; 2047 2048 gcc_attribute_list_opt: 2049 /* empty */ 2050 | gcc_attribute_list 2051 ; 2052 2053 gcc_attribute_list: 2054 gcc_attribute 2055 | gcc_attribute_list gcc_attribute 2056 ; 2057 2058 gcc_attribute: 2059 T_ATTRIBUTE T_LPAREN T_LPAREN { 2060 in_gcc_attribute = true; 2061 } gcc_attribute_spec_list { 2062 in_gcc_attribute = false; 2063 } T_RPAREN T_RPAREN 2064 ; 2065 2066 gcc_attribute_spec_list: 2067 gcc_attribute_spec 2068 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2069 ; 2070 2071 gcc_attribute_spec: 2072 /* empty */ 2073 | T_AT_ALWAYS_INLINE 2074 | T_AT_ALIAS T_LPAREN string T_RPAREN 2075 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2076 | T_AT_ALIGNED 2077 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2078 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2079 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2080 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2081 | T_AT_COLD 2082 | T_AT_COMMON 2083 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2084 | T_AT_CONSTRUCTOR 2085 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2086 | T_AT_DEPRECATED 2087 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2088 | T_AT_DESTRUCTOR 2089 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2090 | T_AT_FALLTHROUGH { 2091 fallthru(1); 2092 } 2093 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2094 constant_expr T_COMMA constant_expr T_RPAREN 2095 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2096 | T_AT_GNU_INLINE 2097 | T_AT_HOT 2098 | T_AT_MALLOC 2099 | T_AT_MAY_ALIAS 2100 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2101 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2102 | T_AT_NO_SANITIZE_THREAD 2103 | T_AT_NOINLINE 2104 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2105 | T_AT_NONNULL 2106 | T_AT_NONSTRING 2107 | T_AT_NORETURN 2108 | T_AT_NOTHROW 2109 | T_AT_NO_INSTRUMENT_FUNCTION 2110 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2111 | T_AT_OPTNONE 2112 | T_AT_PACKED { 2113 addpacked(); 2114 } 2115 | T_AT_PCS T_LPAREN string T_RPAREN 2116 | T_AT_PURE 2117 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2118 | T_AT_RETURNS_NONNULL 2119 | T_AT_RETURNS_TWICE 2120 | T_AT_SECTION T_LPAREN string T_RPAREN 2121 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2122 | T_AT_SENTINEL 2123 | T_AT_TARGET T_LPAREN string T_RPAREN 2124 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2125 | T_AT_TUNION 2126 | T_AT_UNUSED { 2127 add_attr_used(); 2128 } 2129 | T_AT_USED { 2130 add_attr_used(); 2131 } 2132 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2133 | T_AT_WARN_UNUSED_RESULT 2134 | T_AT_WEAK 2135 | T_QUAL { 2136 if ($1 != CONST) 2137 yyerror("Bad attribute"); 2138 } 2139 ; 2140 2141 gcc_attribute_bounded: 2142 T_AT_MINBYTES 2143 | T_AT_STRING 2144 | T_AT_BUFFER 2145 ; 2146 2147 gcc_attribute_format: 2148 T_AT_FORMAT_GNU_PRINTF 2149 | T_AT_FORMAT_PRINTF 2150 | T_AT_FORMAT_SCANF 2151 | T_AT_FORMAT_STRFMON 2152 | T_AT_FORMAT_STRFTIME 2153 | T_AT_FORMAT_SYSLOG 2154 ; 2155 2156 sys: 2157 /* empty */ { 2158 $$ = in_system_header; 2159 } 2160 ; 2161 2162 %% 2163 2164 /* ARGSUSED */ 2165 int 2166 yyerror(const char *msg) 2167 { 2168 /* syntax error '%s' */ 2169 error(249, yytext); 2170 if (++sytxerr >= 5) 2171 norecover(); 2172 return 0; 2173 } 2174 2175 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2176 || (defined(YYDEBUG) && defined(YYBISON)) 2177 static const char * 2178 cgram_to_string(int token, YYSTYPE val) 2179 { 2180 static const char *tqual_name[] = { 2181 "const", "volatile", "restrict", "_Thread_local" 2182 }; 2183 2184 switch (token) { 2185 case T_INCDEC: 2186 case T_MULTIPLICATIVE: 2187 case T_ADDITIVE: 2188 case T_SHIFT: 2189 case T_RELATIONAL: 2190 case T_EQUALITY: 2191 case T_OPASSIGN: 2192 return modtab[val.y_op].m_name; 2193 case T_SCLASS: 2194 return scl_name(val.y_scl); 2195 case T_TYPE: 2196 case T_STRUCT_OR_UNION: 2197 return tspec_name(val.y_tspec); 2198 case T_QUAL: 2199 return tqual_name[val.y_tqual]; 2200 case T_NAME: 2201 return val.y_name->sb_name; 2202 default: 2203 return "<none>"; 2204 } 2205 } 2206 #endif 2207 2208 #if defined(YYDEBUG) && defined(YYBISON) 2209 static inline void 2210 cgram_print(FILE *output, int token, YYSTYPE val) 2211 { 2212 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2213 } 2214 #endif 2215 2216 static void 2217 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2218 { 2219 declare(decl, initflg, renaming); 2220 if (renaming != NULL) 2221 freeyyv(&renaming, T_NAME); 2222 } 2223 2224 /* 2225 * Discard all input tokens up to and including the next 2226 * unmatched right paren 2227 */ 2228 static void 2229 read_until_rparen(void) 2230 { 2231 int level; 2232 2233 if (yychar < 0) 2234 yychar = yylex(); 2235 freeyyv(&yylval, yychar); 2236 2237 level = 1; 2238 while (yychar != T_RPAREN || --level > 0) { 2239 if (yychar == T_LPAREN) { 2240 level++; 2241 } else if (yychar <= 0) { 2242 break; 2243 } 2244 freeyyv(&yylval, yychar = yylex()); 2245 } 2246 2247 yyclearin; 2248 } 2249 2250 static sym_t * 2251 symbolrename(sym_t *s, sbuf_t *sb) 2252 { 2253 if (sb != NULL) 2254 s->s_rename = sb->sb_name; 2255 return s; 2256 } 2257
Indexes created Fri Oct 03 02:09:57 GMT 2025