cgram.y revision 1.380
1 %{ 2 /* $NetBSD: cgram.y,v 1.380 2022/02/26 19:01:09 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 1.380 2022/02/26 19:01:09 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 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 $$ = build_name(*current_initsym(), false); 518 end_initialization(); 519 } 520 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 521 do_statement_expr($3); 522 } compound_statement_rbrace T_RPAREN { 523 $$ = end_statement_expr(); 524 } 525 ; 526 527 comma_opt: /* helper for 'postfix_expression' */ 528 /* empty */ 529 | T_COMMA 530 ; 531 532 /* 533 * The inner part of a GCC statement-expression of the form ({ ... }). 534 * 535 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 536 */ 537 gcc_statement_expr_list: 538 gcc_statement_expr_item 539 | gcc_statement_expr_list gcc_statement_expr_item { 540 $$ = $2; 541 } 542 ; 543 544 gcc_statement_expr_item: 545 declaration_or_error { 546 clear_warning_flags(); 547 $$ = NULL; 548 } 549 | non_expr_statement { 550 $$ = expr_zalloc_tnode(); 551 $$->tn_type = gettyp(VOID); 552 } 553 | expression T_SEMI { 554 if ($1 == NULL) { /* in case of syntax errors */ 555 $$ = expr_zalloc_tnode(); 556 $$->tn_type = gettyp(VOID); 557 } else { 558 /* XXX: do that only on the last name */ 559 if ($1->tn_op == NAME) 560 $1->tn_sym->s_used = true; 561 expr($1, false, false, false, false); 562 seen_fallthrough = false; 563 $$ = $1; 564 } 565 } 566 ; 567 568 point_or_arrow: /* helper for 'postfix_expression' */ 569 T_POINT { 570 symtyp = FMEMBER; 571 $$ = POINT; 572 } 573 | T_ARROW { 574 symtyp = FMEMBER; 575 $$ = ARROW; 576 } 577 ; 578 579 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 580 argument_expression_list: 581 assignment_expression { 582 $$ = build_function_argument(NULL, $1); 583 } 584 | argument_expression_list T_COMMA assignment_expression { 585 $$ = build_function_argument($1, $3); 586 } 587 ; 588 589 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 590 unary_expression: 591 postfix_expression 592 | T_INCDEC sys unary_expression { 593 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2, $3); 594 } 595 | T_AMPER sys cast_expression { 596 $$ = build_unary(ADDR, $2, $3); 597 } 598 | T_ASTERISK sys cast_expression { 599 $$ = build_unary(INDIR, $2, $3); 600 } 601 | T_ADDITIVE sys cast_expression { 602 if (tflag && $1 == PLUS) { 603 /* unary + is illegal in traditional C */ 604 warning(100); 605 } 606 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2, $3); 607 } 608 | T_COMPLEMENT sys cast_expression { 609 $$ = build_unary(COMPL, $2, $3); 610 } 611 | T_LOGNOT sys cast_expression { 612 $$ = build_unary(NOT, $2, $3); 613 } 614 | T_REAL sys cast_expression { /* GCC c_parser_unary_expression */ 615 $$ = build_unary(REAL, $2, $3); 616 } 617 | T_IMAG sys cast_expression { /* GCC c_parser_unary_expression */ 618 $$ = build_unary(IMAG, $2, $3); 619 } 620 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 621 $$ = $2; 622 } 623 | T_SIZEOF unary_expression { 624 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 625 if ($$ != NULL) 626 check_expr_misc($2, 627 false, false, false, false, false, true); 628 } 629 | T_SIZEOF T_LPAREN type_name T_RPAREN { 630 $$ = build_sizeof($3); 631 } 632 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 633 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 634 /* TODO: c11ism */ 635 $$ = build_alignof($3); 636 } 637 ; 638 639 /* The rule 'unary_operator' is inlined into unary_expression. */ 640 641 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 642 cast_expression: 643 unary_expression 644 | T_LPAREN type_name T_RPAREN cast_expression { 645 $$ = cast($4, $2); 646 } 647 ; 648 649 expression_opt: 650 /* empty */ { 651 $$ = NULL; 652 } 653 | expression 654 ; 655 656 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 657 /* 'conditional_expression' also implements 'additive_expression'. */ 658 /* 'conditional_expression' also implements 'shift_expression'. */ 659 /* 'conditional_expression' also implements 'relational_expression'. */ 660 /* 'conditional_expression' also implements 'equality_expression'. */ 661 /* 'conditional_expression' also implements 'AND_expression'. */ 662 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 663 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 664 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 665 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 666 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 667 conditional_expression: 668 cast_expression 669 | conditional_expression T_ASTERISK sys conditional_expression { 670 $$ = build_binary($1, MULT, $3, $4); 671 } 672 | conditional_expression T_MULTIPLICATIVE sys conditional_expression { 673 $$ = build_binary($1, $2, $3, $4); 674 } 675 | conditional_expression T_ADDITIVE sys conditional_expression { 676 $$ = build_binary($1, $2, $3, $4); 677 } 678 | conditional_expression T_SHIFT sys conditional_expression { 679 $$ = build_binary($1, $2, $3, $4); 680 } 681 | conditional_expression T_RELATIONAL sys conditional_expression { 682 $$ = build_binary($1, $2, $3, $4); 683 } 684 | conditional_expression T_EQUALITY sys conditional_expression { 685 $$ = build_binary($1, $2, $3, $4); 686 } 687 | conditional_expression T_AMPER sys conditional_expression { 688 $$ = build_binary($1, BITAND, $3, $4); 689 } 690 | conditional_expression T_BITXOR sys conditional_expression { 691 $$ = build_binary($1, BITXOR, $3, $4); 692 } 693 | conditional_expression T_BITOR sys conditional_expression { 694 $$ = build_binary($1, BITOR, $3, $4); 695 } 696 | conditional_expression T_LOGAND sys conditional_expression { 697 $$ = build_binary($1, LOGAND, $3, $4); 698 } 699 | conditional_expression T_LOGOR sys conditional_expression { 700 $$ = build_binary($1, LOGOR, $3, $4); 701 } 702 | conditional_expression T_QUEST sys 703 expression T_COLON sys conditional_expression { 704 $$ = build_binary($1, QUEST, $3, 705 build_binary($4, COLON, $6, $7)); 706 } 707 ; 708 709 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 710 assignment_expression: 711 conditional_expression 712 | unary_expression T_ASSIGN sys assignment_expression { 713 $$ = build_binary($1, ASSIGN, $3, $4); 714 } 715 | unary_expression T_OPASSIGN sys assignment_expression { 716 $$ = build_binary($1, $2, $3, $4); 717 } 718 ; 719 720 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 721 expression: 722 assignment_expression 723 | expression T_COMMA sys assignment_expression { 724 $$ = build_binary($1, COMMA, $3, $4); 725 } 726 ; 727 728 constant_expr_list_opt: /* helper for gcc_attribute */ 729 /* empty */ 730 | constant_expr_list 731 ; 732 733 constant_expr_list: /* helper for gcc_attribute */ 734 constant_expr 735 | constant_expr_list T_COMMA constant_expr 736 ; 737 738 constant_expr: /* C99 6.6 */ 739 conditional_expression 740 ; 741 742 declaration_or_error: 743 declaration 744 | error T_SEMI 745 ; 746 747 declaration: /* C99 6.7 */ 748 begin_type_declmods end_type T_SEMI { 749 if (dcs->d_scl == TYPEDEF) { 750 /* typedef declares no type name */ 751 warning(72); 752 } else { 753 /* empty declaration */ 754 warning(2); 755 } 756 } 757 | begin_type_declmods end_type notype_init_declarators T_SEMI 758 /* ^^ There is no check for the missing type-specifier. */ 759 | begin_type_declaration_specifiers end_type T_SEMI { 760 if (dcs->d_scl == TYPEDEF) { 761 /* typedef declares no type name */ 762 warning(72); 763 } else if (!dcs->d_nonempty_decl) { 764 /* empty declaration */ 765 warning(2); 766 } 767 } 768 | begin_type_declaration_specifiers end_type 769 type_init_declarators T_SEMI 770 | static_assert_declaration 771 ; 772 773 begin_type_declaration_specifiers: /* see C99 6.7 */ 774 begin_type_typespec { 775 add_type($1); 776 } 777 | begin_type_declmods type_specifier { 778 add_type($2); 779 } 780 | type_attribute begin_type_declaration_specifiers 781 | begin_type_declaration_specifiers declmod 782 | begin_type_declaration_specifiers notype_type_specifier { 783 add_type($2); 784 } 785 ; 786 787 begin_type_declmods: /* see C99 6.7 */ 788 begin_type T_QUAL { 789 add_qualifier($2); 790 } 791 | begin_type T_SCLASS { 792 add_storage_class($2); 793 } 794 | begin_type_declmods declmod 795 ; 796 797 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 798 begin_type_specifier_qualifier_list_postfix 799 | type_attribute_list begin_type_specifier_qualifier_list_postfix 800 ; 801 802 begin_type_specifier_qualifier_list_postfix: 803 begin_type_typespec { 804 add_type($1); 805 } 806 | begin_type_qualifier_list type_specifier { 807 add_type($2); 808 } 809 | begin_type_specifier_qualifier_list_postfix T_QUAL { 810 add_qualifier($2); 811 } 812 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 813 add_type($2); 814 } 815 | begin_type_specifier_qualifier_list_postfix type_attribute 816 ; 817 818 begin_type_typespec: 819 begin_type notype_type_specifier { 820 $$ = $2; 821 } 822 | T_TYPENAME begin_type { 823 $$ = getsym($1)->s_type; 824 } 825 ; 826 827 begin_type_qualifier_list: 828 begin_type T_QUAL { 829 add_qualifier($2); 830 } 831 | begin_type_qualifier_list T_QUAL { 832 add_qualifier($2); 833 } 834 ; 835 836 declmod: 837 T_QUAL { 838 add_qualifier($1); 839 } 840 | T_SCLASS { 841 add_storage_class($1); 842 } 843 | type_attribute_list 844 ; 845 846 type_attribute_list: 847 type_attribute 848 | type_attribute_list type_attribute 849 ; 850 851 type_attribute_opt: 852 /* empty */ 853 | type_attribute 854 ; 855 856 type_attribute: /* See C11 6.7 declaration-specifiers */ 857 gcc_attribute 858 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 859 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 860 | T_PACKED { 861 addpacked(); 862 } 863 | T_NORETURN 864 ; 865 866 begin_type: 867 /* empty */ { 868 begin_type(); 869 } 870 ; 871 872 end_type: 873 /* empty */ { 874 end_type(); 875 } 876 ; 877 878 type_specifier: /* C99 6.7.2 */ 879 notype_type_specifier 880 | T_TYPENAME { 881 $$ = getsym($1)->s_type; 882 } 883 ; 884 885 notype_type_specifier: /* see C99 6.7.2 */ 886 T_TYPE { 887 $$ = gettyp($1); 888 } 889 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 890 $$ = $3->tn_type; 891 } 892 | struct_or_union_specifier { 893 end_declaration_level(); 894 $$ = $1; 895 } 896 | enum_specifier { 897 end_declaration_level(); 898 $$ = $1; 899 } 900 ; 901 902 struct_or_union_specifier: /* C99 6.7.2.1 */ 903 struct_or_union identifier_sym { 904 /* 905 * STDC requires that "struct a;" always introduces 906 * a new tag if "a" is not declared at current level 907 * 908 * yychar is valid because otherwise the parser would not 909 * have been able to decide if it must shift or reduce 910 */ 911 $$ = mktag($2, $1, false, yychar == T_SEMI); 912 } 913 | struct_or_union identifier_sym { 914 dcs->d_tagtyp = mktag($2, $1, true, false); 915 } braced_struct_declaration_list { 916 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 917 } 918 | struct_or_union { 919 dcs->d_tagtyp = mktag(NULL, $1, true, false); 920 } braced_struct_declaration_list { 921 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 922 } 923 | struct_or_union error { 924 symtyp = FVFT; 925 $$ = gettyp(INT); 926 } 927 ; 928 929 struct_or_union: /* C99 6.7.2.1 */ 930 T_STRUCT_OR_UNION { 931 symtyp = FTAG; 932 begin_declaration_level($1 == STRUCT ? MOS : MOU); 933 dcs->d_offset = 0; 934 dcs->d_sou_align_in_bits = CHAR_SIZE; 935 $$ = $1; 936 } 937 | struct_or_union type_attribute 938 ; 939 940 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 941 struct_declaration_lbrace struct_declaration_list_with_rbrace { 942 $$ = $2; 943 } 944 ; 945 946 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 947 T_LBRACE { 948 symtyp = FVFT; 949 } 950 ; 951 952 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 953 struct_declaration_list T_RBRACE 954 | T_RBRACE { 955 /* XXX: This is not allowed by any C standard. */ 956 $$ = NULL; 957 } 958 ; 959 960 struct_declaration_list: /* C99 6.7.2.1 */ 961 struct_declaration 962 | struct_declaration_list struct_declaration { 963 $$ = lnklst($1, $2); 964 } 965 ; 966 967 struct_declaration: /* C99 6.7.2.1 */ 968 begin_type_qualifier_list end_type { 969 /* ^^ There is no check for the missing type-specifier. */ 970 /* too late, i know, but getsym() compensates it */ 971 symtyp = FMEMBER; 972 } notype_struct_declarators type_attribute_opt T_SEMI { 973 symtyp = FVFT; 974 $$ = $4; 975 } 976 | begin_type_specifier_qualifier_list end_type { 977 symtyp = FMEMBER; 978 } type_struct_declarators type_attribute_opt T_SEMI { 979 symtyp = FVFT; 980 $$ = $4; 981 } 982 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 983 /* syntax error '%s' */ 984 error(249, "member without type"); 985 $$ = NULL; 986 } 987 | begin_type_specifier_qualifier_list end_type type_attribute_opt 988 T_SEMI { 989 symtyp = FVFT; 990 if (!Sflag) 991 /* anonymous struct/union members is a C9X feature */ 992 warning(49); 993 if (is_struct_or_union(dcs->d_type->t_tspec)) { 994 $$ = dcs->d_type->t_str->sou_first_member; 995 /* add all the members of the anonymous struct/union */ 996 anonymize($$); 997 } else { 998 /* syntax error '%s' */ 999 error(249, "unnamed member"); 1000 $$ = NULL; 1001 } 1002 } 1003 | static_assert_declaration { 1004 $$ = NULL; 1005 } 1006 | error T_SEMI { 1007 symtyp = FVFT; 1008 $$ = NULL; 1009 } 1010 ; 1011 1012 notype_struct_declarators: 1013 notype_struct_declarator { 1014 $$ = declarator_1_struct_union($1); 1015 } 1016 | notype_struct_declarators { 1017 symtyp = FMEMBER; 1018 } T_COMMA type_struct_declarator { 1019 $$ = lnklst($1, declarator_1_struct_union($4)); 1020 } 1021 ; 1022 1023 type_struct_declarators: 1024 type_struct_declarator { 1025 $$ = declarator_1_struct_union($1); 1026 } 1027 | type_struct_declarators { 1028 symtyp = FMEMBER; 1029 } T_COMMA type_struct_declarator { 1030 $$ = lnklst($1, declarator_1_struct_union($4)); 1031 } 1032 ; 1033 1034 notype_struct_declarator: 1035 notype_declarator 1036 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1037 $$ = bitfield($1, to_int_constant($3, true)); 1038 } 1039 | { 1040 symtyp = FVFT; 1041 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1042 $$ = bitfield(NULL, to_int_constant($3, true)); 1043 } 1044 ; 1045 1046 type_struct_declarator: 1047 type_declarator 1048 | type_declarator T_COLON constant_expr { 1049 $$ = bitfield($1, to_int_constant($3, true)); 1050 } 1051 | { 1052 symtyp = FVFT; 1053 } T_COLON constant_expr { 1054 $$ = bitfield(NULL, to_int_constant($3, true)); 1055 } 1056 ; 1057 1058 enum_specifier: /* C99 6.7.2.2 */ 1059 enum gcc_attribute_list_opt identifier_sym { 1060 $$ = mktag($3, ENUM, false, false); 1061 } 1062 | enum gcc_attribute_list_opt identifier_sym { 1063 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1064 } enum_declaration /*gcc_attribute_list_opt*/ { 1065 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1066 } 1067 | enum gcc_attribute_list_opt { 1068 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1069 } enum_declaration /*gcc_attribute_list_opt*/ { 1070 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1071 } 1072 | enum error { 1073 symtyp = FVFT; 1074 $$ = gettyp(INT); 1075 } 1076 ; 1077 1078 enum: /* helper for C99 6.7.2.2 */ 1079 T_ENUM { 1080 symtyp = FTAG; 1081 begin_declaration_level(CTCONST); 1082 } 1083 ; 1084 1085 enum_declaration: /* helper for C99 6.7.2.2 */ 1086 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1087 $$ = $2; 1088 } 1089 ; 1090 1091 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1092 T_LBRACE { 1093 symtyp = FVFT; 1094 enumval = 0; 1095 } 1096 ; 1097 1098 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1099 enumerator_list 1100 | enumerator_list T_COMMA { 1101 if (sflag) { 1102 /* trailing ',' prohibited in enum declaration */ 1103 error(54); 1104 } else { 1105 /* trailing ',' prohibited in enum declaration */ 1106 c99ism(54); 1107 } 1108 $$ = $1; 1109 } 1110 ; 1111 1112 enumerator_list: /* C99 6.7.2.2 */ 1113 enumerator 1114 | enumerator_list T_COMMA enumerator { 1115 $$ = lnklst($1, $3); 1116 } 1117 | error { 1118 $$ = NULL; 1119 } 1120 ; 1121 1122 enumerator: /* C99 6.7.2.2 */ 1123 identifier_sym gcc_attribute_list_opt { 1124 $$ = enumeration_constant($1, enumval, true); 1125 } 1126 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1127 $$ = enumeration_constant($1, to_int_constant($4, true), 1128 false); 1129 } 1130 ; 1131 1132 type_qualifier: /* C99 6.7.3 */ 1133 T_QUAL { 1134 $$ = xcalloc(1, sizeof(*$$)); 1135 if ($1 == CONST) 1136 $$->p_const = true; 1137 if ($1 == VOLATILE) 1138 $$->p_volatile = true; 1139 } 1140 ; 1141 1142 pointer: /* C99 6.7.5 */ 1143 asterisk type_qualifier_list_opt { 1144 $$ = merge_qualified_pointer($1, $2); 1145 } 1146 | asterisk type_qualifier_list_opt pointer { 1147 $$ = merge_qualified_pointer($1, $2); 1148 $$ = merge_qualified_pointer($$, $3); 1149 } 1150 ; 1151 1152 asterisk: /* helper for 'pointer' */ 1153 T_ASTERISK { 1154 $$ = xcalloc(1, sizeof(*$$)); 1155 $$->p_pointer = true; 1156 } 1157 ; 1158 1159 type_qualifier_list_opt: /* see C99 6.7.5 */ 1160 /* empty */ { 1161 $$ = NULL; 1162 } 1163 | type_qualifier_list 1164 ; 1165 1166 type_qualifier_list: /* C99 6.7.5 */ 1167 type_qualifier 1168 | type_qualifier_list type_qualifier { 1169 $$ = merge_qualified_pointer($1, $2); 1170 } 1171 ; 1172 1173 /* 1174 * For an explanation of 'notype' in the following rules, see 1175 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1176 */ 1177 1178 notype_init_declarators: 1179 notype_init_declarator 1180 | notype_init_declarators T_COMMA type_init_declarator 1181 ; 1182 1183 type_init_declarators: 1184 type_init_declarator 1185 | type_init_declarators T_COMMA type_init_declarator 1186 ; 1187 1188 notype_init_declarator: 1189 notype_declarator asm_or_symbolrename_opt { 1190 cgram_declare($1, false, $2); 1191 check_size($1); 1192 } 1193 | notype_declarator asm_or_symbolrename_opt { 1194 begin_initialization($1); 1195 cgram_declare($1, true, $2); 1196 } T_ASSIGN initializer { 1197 check_size($1); 1198 end_initialization(); 1199 } 1200 ; 1201 1202 type_init_declarator: 1203 type_declarator asm_or_symbolrename_opt { 1204 cgram_declare($1, false, $2); 1205 check_size($1); 1206 } 1207 | type_declarator asm_or_symbolrename_opt { 1208 begin_initialization($1); 1209 cgram_declare($1, true, $2); 1210 } T_ASSIGN initializer { 1211 check_size($1); 1212 end_initialization(); 1213 } 1214 ; 1215 1216 notype_declarator: 1217 notype_direct_declarator 1218 | pointer notype_direct_declarator { 1219 $$ = add_pointer($2, $1); 1220 } 1221 ; 1222 1223 type_declarator: 1224 type_direct_declarator 1225 | pointer type_direct_declarator { 1226 $$ = add_pointer($2, $1); 1227 } 1228 ; 1229 1230 notype_direct_declarator: 1231 T_NAME { 1232 $$ = declarator_name(getsym($1)); 1233 } 1234 | T_LPAREN type_declarator T_RPAREN { 1235 $$ = $2; 1236 } 1237 | type_attribute notype_direct_declarator { 1238 $$ = $2; 1239 } 1240 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1241 $$ = add_array($1, $3.has_dim, $3.dim); 1242 } 1243 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1244 $$ = add_function(symbolrename($1, $3), $2); 1245 end_declaration_level(); 1246 block_level--; 1247 } 1248 | notype_direct_declarator type_attribute 1249 ; 1250 1251 type_direct_declarator: 1252 identifier { 1253 $$ = declarator_name(getsym($1)); 1254 } 1255 | T_LPAREN type_declarator T_RPAREN { 1256 $$ = $2; 1257 } 1258 | type_attribute type_direct_declarator { 1259 $$ = $2; 1260 } 1261 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1262 $$ = add_array($1, $3.has_dim, $3.dim); 1263 } 1264 | type_direct_declarator param_list asm_or_symbolrename_opt { 1265 $$ = add_function(symbolrename($1, $3), $2); 1266 end_declaration_level(); 1267 block_level--; 1268 } 1269 | type_direct_declarator type_attribute 1270 ; 1271 1272 /* 1273 * The two distinct rules type_param_declarator and notype_param_declarator 1274 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1275 * always treated as a typename, not an argument name. For example, after 1276 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1277 * "f(int (double));", not "f(int a);". 1278 */ 1279 type_param_declarator: 1280 direct_param_declarator 1281 | pointer direct_param_declarator { 1282 $$ = add_pointer($2, $1); 1283 } 1284 ; 1285 1286 notype_param_declarator: 1287 direct_notype_param_declarator 1288 | pointer direct_notype_param_declarator { 1289 $$ = add_pointer($2, $1); 1290 } 1291 ; 1292 1293 direct_param_declarator: 1294 identifier type_attribute_list { 1295 $$ = declarator_name(getsym($1)); 1296 } 1297 | identifier { 1298 $$ = declarator_name(getsym($1)); 1299 } 1300 | T_LPAREN notype_param_declarator T_RPAREN { 1301 $$ = $2; 1302 } 1303 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1304 gcc_attribute_list_opt { 1305 $$ = add_array($1, $3.has_dim, $3.dim); 1306 } 1307 | direct_param_declarator param_list asm_or_symbolrename_opt { 1308 $$ = add_function(symbolrename($1, $3), $2); 1309 end_declaration_level(); 1310 block_level--; 1311 } 1312 ; 1313 1314 direct_notype_param_declarator: 1315 identifier { 1316 $$ = declarator_name(getsym($1)); 1317 } 1318 | T_LPAREN notype_param_declarator T_RPAREN { 1319 $$ = $2; 1320 } 1321 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1322 $$ = add_array($1, $3.has_dim, $3.dim); 1323 } 1324 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1325 $$ = add_function(symbolrename($1, $3), $2); 1326 end_declaration_level(); 1327 block_level--; 1328 } 1329 ; 1330 1331 param_list: 1332 id_list_lparen identifier_list T_RPAREN { 1333 $$ = $2; 1334 } 1335 | abstract_decl_param_list 1336 ; 1337 1338 id_list_lparen: 1339 T_LPAREN { 1340 block_level++; 1341 begin_declaration_level(PROTO_ARG); 1342 } 1343 ; 1344 1345 array_size_opt: 1346 /* empty */ { 1347 $$.has_dim = false; 1348 $$.dim = 0; 1349 } 1350 | T_ASTERISK { 1351 /* since C99; variable length array of unspecified size */ 1352 $$.has_dim = false; /* TODO: maybe change to true */ 1353 $$.dim = 0; /* just as a placeholder */ 1354 } 1355 | array_size { 1356 $$.has_dim = true; 1357 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1358 } 1359 ; 1360 1361 array_size: 1362 type_qualifier_list_opt T_SCLASS constant_expr { 1363 /* C11 6.7.6.3p7 */ 1364 if ($2 != STATIC) 1365 yyerror("Bad attribute"); 1366 /* static array size is a C11 extension */ 1367 c11ism(343); 1368 $$ = $3; 1369 } 1370 | T_QUAL { 1371 /* C11 6.7.6.2 */ 1372 if ($1 != RESTRICT) 1373 yyerror("Bad attribute"); 1374 $$ = NULL; 1375 } 1376 | constant_expr 1377 ; 1378 1379 identifier_list: /* C99 6.7.5 */ 1380 T_NAME { 1381 $$ = old_style_function_name(getsym($1)); 1382 } 1383 | identifier_list T_COMMA T_NAME { 1384 $$ = lnklst($1, old_style_function_name(getsym($3))); 1385 } 1386 | identifier_list error 1387 ; 1388 1389 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1390 type_name: /* C99 6.7.6 */ 1391 { 1392 begin_declaration_level(ABSTRACT); 1393 } abstract_declaration { 1394 end_declaration_level(); 1395 $$ = $2->s_type; 1396 } 1397 ; 1398 1399 abstract_declaration: /* specific to lint */ 1400 begin_type_qualifier_list end_type { 1401 $$ = declare_1_abstract(abstract_name()); 1402 } 1403 | begin_type_specifier_qualifier_list end_type { 1404 $$ = declare_1_abstract(abstract_name()); 1405 } 1406 | begin_type_qualifier_list end_type abstract_declarator { 1407 $$ = declare_1_abstract($3); 1408 } 1409 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1410 $$ = declare_1_abstract($3); 1411 } 1412 ; 1413 1414 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1415 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1416 abstract_declarator: 1417 pointer { 1418 $$ = add_pointer(abstract_name(), $1); 1419 } 1420 | direct_abstract_declarator 1421 | pointer direct_abstract_declarator { 1422 $$ = add_pointer($2, $1); 1423 } 1424 ; 1425 1426 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1427 direct_abstract_declarator: 1428 /* TODO: sort rules according to C99 */ 1429 T_LPAREN abstract_declarator T_RPAREN { 1430 $$ = $2; 1431 } 1432 | T_LBRACK array_size_opt T_RBRACK { 1433 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1434 } 1435 | type_attribute direct_abstract_declarator { 1436 $$ = $2; 1437 } 1438 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1439 $$ = add_array($1, $3.has_dim, $3.dim); 1440 } 1441 | abstract_decl_param_list asm_or_symbolrename_opt { 1442 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1443 end_declaration_level(); 1444 block_level--; 1445 } 1446 | direct_abstract_declarator abstract_decl_param_list 1447 asm_or_symbolrename_opt { 1448 $$ = add_function(symbolrename($1, $3), $2); 1449 end_declaration_level(); 1450 block_level--; 1451 } 1452 | direct_abstract_declarator type_attribute_list 1453 ; 1454 1455 abstract_decl_param_list: /* specific to lint */ 1456 abstract_decl_lparen T_RPAREN type_attribute_opt { 1457 $$ = NULL; 1458 } 1459 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1460 type_attribute_opt { 1461 dcs->d_proto = true; 1462 $$ = $2; 1463 } 1464 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1465 $$ = NULL; 1466 } 1467 ; 1468 1469 abstract_decl_lparen: /* specific to lint */ 1470 T_LPAREN { 1471 block_level++; 1472 begin_declaration_level(PROTO_ARG); 1473 } 1474 ; 1475 1476 vararg_parameter_type_list: /* specific to lint */ 1477 parameter_type_list 1478 | parameter_type_list T_COMMA T_ELLIPSIS { 1479 dcs->d_vararg = true; 1480 $$ = $1; 1481 } 1482 | T_ELLIPSIS { 1483 if (sflag) { 1484 /* ANSI C requires formal parameter before '...' */ 1485 error(84); 1486 } else if (!tflag) { 1487 /* ANSI C requires formal parameter before '...' */ 1488 warning(84); 1489 } 1490 dcs->d_vararg = true; 1491 $$ = NULL; 1492 } 1493 ; 1494 1495 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1496 parameter_type_list: 1497 parameter_declaration 1498 | parameter_type_list T_COMMA parameter_declaration { 1499 $$ = lnklst($1, $3); 1500 } 1501 ; 1502 1503 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1504 parameter_declaration: 1505 begin_type_declmods end_type { 1506 /* ^^ There is no check for the missing type-specifier. */ 1507 $$ = declare_argument(abstract_name(), false); 1508 } 1509 | begin_type_declaration_specifiers end_type { 1510 $$ = declare_argument(abstract_name(), false); 1511 } 1512 | begin_type_declmods end_type notype_param_declarator { 1513 /* ^^ There is no check for the missing type-specifier. */ 1514 $$ = declare_argument($3, false); 1515 } 1516 /* 1517 * type_param_declarator is needed because of following conflict: 1518 * "typedef int a; f(int (a));" could be parsed as 1519 * "function with argument a of type int", or 1520 * "function with an abstract argument of type function". 1521 * This grammar realizes the second case. 1522 */ 1523 | begin_type_declaration_specifiers end_type type_param_declarator { 1524 $$ = declare_argument($3, false); 1525 } 1526 | begin_type_declmods end_type abstract_declarator { 1527 /* ^^ There is no check for the missing type-specifier. */ 1528 $$ = declare_argument($3, false); 1529 } 1530 | begin_type_declaration_specifiers end_type abstract_declarator { 1531 $$ = declare_argument($3, false); 1532 } 1533 ; 1534 1535 initializer: /* C99 6.7.8 "Initialization" */ 1536 assignment_expression { 1537 init_expr($1); 1538 } 1539 | init_lbrace init_rbrace { 1540 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1541 } 1542 | init_lbrace initializer_list comma_opt init_rbrace 1543 /* XXX: What is this error handling for? */ 1544 | error 1545 ; 1546 1547 initializer_list: /* C99 6.7.8 "Initialization" */ 1548 initializer_list_item 1549 | initializer_list T_COMMA initializer_list_item 1550 ; 1551 1552 initializer_list_item: /* helper */ 1553 designation initializer 1554 | initializer 1555 ; 1556 1557 designation: /* C99 6.7.8 "Initialization" */ 1558 begin_designation designator_list T_ASSIGN 1559 | identifier T_COLON { 1560 /* GCC style struct or union member name in initializer */ 1561 gnuism(315); 1562 begin_designation(); 1563 add_designator_member($1); 1564 } 1565 ; 1566 1567 begin_designation: /* lint-specific helper */ 1568 /* empty */ { 1569 begin_designation(); 1570 } 1571 ; 1572 1573 designator_list: /* C99 6.7.8 "Initialization" */ 1574 designator 1575 | designator_list designator 1576 ; 1577 1578 designator: /* C99 6.7.8 "Initialization" */ 1579 T_LBRACK range T_RBRACK { 1580 add_designator_subscript($2); 1581 if (!Sflag) 1582 /* array initializer with designators is a C9X ... */ 1583 warning(321); 1584 } 1585 | T_POINT identifier { 1586 if (!Sflag) 1587 /* struct or union member name in initializer is ... */ 1588 warning(313); 1589 add_designator_member($2); 1590 } 1591 ; 1592 1593 static_assert_declaration: 1594 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1595 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1596 ; 1597 1598 range: 1599 constant_expr { 1600 $$.lo = to_int_constant($1, true); 1601 $$.hi = $$.lo; 1602 } 1603 | constant_expr T_ELLIPSIS constant_expr { 1604 $$.lo = to_int_constant($1, true); 1605 $$.hi = to_int_constant($3, true); 1606 /* initialization with '[a...b]' is a GCC extension */ 1607 gnuism(340); 1608 } 1609 ; 1610 1611 init_lbrace: /* helper */ 1612 T_LBRACE { 1613 init_lbrace(); 1614 } 1615 ; 1616 1617 init_rbrace: /* helper */ 1618 T_RBRACE { 1619 init_rbrace(); 1620 } 1621 ; 1622 1623 asm_or_symbolrename_opt: /* GCC extensions */ 1624 /* empty */ { 1625 $$ = NULL; 1626 } 1627 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1628 freeyyv(&$3, T_STRING); 1629 $$ = NULL; 1630 } 1631 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1632 $$ = $3; 1633 } 1634 ; 1635 1636 statement: /* C99 6.8 */ 1637 expression_statement 1638 | non_expr_statement 1639 ; 1640 1641 non_expr_statement: /* helper for C99 6.8 */ 1642 type_attribute T_SEMI 1643 | labeled_statement 1644 | compound_statement 1645 | selection_statement 1646 | iteration_statement 1647 | jump_statement { 1648 seen_fallthrough = false; 1649 } 1650 | asm_statement 1651 ; 1652 1653 labeled_statement: /* C99 6.8.1 */ 1654 label type_attribute_opt statement 1655 ; 1656 1657 label: 1658 T_NAME T_COLON { 1659 symtyp = FLABEL; 1660 named_label(getsym($1)); 1661 } 1662 | T_CASE constant_expr T_COLON { 1663 case_label($2); 1664 seen_fallthrough = true; 1665 } 1666 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1667 /* XXX: We don't fill all cases */ 1668 case_label($2); 1669 seen_fallthrough = true; 1670 } 1671 | T_DEFAULT T_COLON { 1672 default_label(); 1673 seen_fallthrough = true; 1674 } 1675 ; 1676 1677 compound_statement: /* C99 6.8.2 */ 1678 compound_statement_lbrace compound_statement_rbrace 1679 | compound_statement_lbrace block_item_list compound_statement_rbrace 1680 ; 1681 1682 compound_statement_lbrace: 1683 T_LBRACE { 1684 block_level++; 1685 mem_block_level++; 1686 begin_declaration_level(AUTO); 1687 } 1688 ; 1689 1690 compound_statement_rbrace: 1691 T_RBRACE { 1692 end_declaration_level(); 1693 freeblk(); 1694 mem_block_level--; 1695 block_level--; 1696 seen_fallthrough = false; 1697 } 1698 ; 1699 1700 block_item_list: /* C99 6.8.2 */ 1701 block_item 1702 | block_item_list block_item { 1703 if (!Sflag && $1 && !$2) 1704 /* declarations after statements is a C99 feature */ 1705 c99ism(327); 1706 $$ = $1 || $2; 1707 } 1708 ; 1709 1710 block_item: /* C99 6.8.2 */ 1711 declaration_or_error { 1712 $$ = false; 1713 restore_warning_flags(); 1714 } 1715 | statement { 1716 $$ = true; 1717 restore_warning_flags(); 1718 } 1719 ; 1720 1721 expression_statement: /* C99 6.8.3 */ 1722 expression T_SEMI { 1723 expr($1, false, false, false, false); 1724 seen_fallthrough = false; 1725 } 1726 | T_SEMI { 1727 check_statement_reachable(); 1728 seen_fallthrough = false; 1729 } 1730 ; 1731 1732 selection_statement: /* C99 6.8.4 */ 1733 if_without_else %prec T_THEN { 1734 save_warning_flags(); 1735 if2(); 1736 if3(false); 1737 } 1738 | if_without_else T_ELSE { 1739 save_warning_flags(); 1740 if2(); 1741 } statement { 1742 clear_warning_flags(); 1743 if3(true); 1744 } 1745 | if_without_else T_ELSE error { 1746 clear_warning_flags(); 1747 if3(false); 1748 } 1749 | switch_expr statement { 1750 clear_warning_flags(); 1751 switch2(); 1752 } 1753 | switch_expr error { 1754 clear_warning_flags(); 1755 switch2(); 1756 } 1757 ; 1758 1759 if_without_else: /* see C99 6.8.4 */ 1760 if_expr statement 1761 | if_expr error 1762 ; 1763 1764 if_expr: /* see C99 6.8.4 */ 1765 T_IF T_LPAREN expression T_RPAREN { 1766 if1($3); 1767 clear_warning_flags(); 1768 } 1769 ; 1770 1771 switch_expr: /* see C99 6.8.4 */ 1772 T_SWITCH T_LPAREN expression T_RPAREN { 1773 switch1($3); 1774 clear_warning_flags(); 1775 } 1776 ; 1777 1778 iteration_statement: /* C99 6.8.5 */ 1779 while_expr statement { 1780 clear_warning_flags(); 1781 while2(); 1782 } 1783 | while_expr error { 1784 clear_warning_flags(); 1785 while2(); 1786 } 1787 | do_statement do_while_expr { 1788 do2($2); 1789 seen_fallthrough = false; 1790 } 1791 | do error { 1792 clear_warning_flags(); 1793 do2(NULL); 1794 } 1795 | for_exprs statement { 1796 clear_warning_flags(); 1797 for2(); 1798 end_declaration_level(); 1799 block_level--; 1800 } 1801 | for_exprs error { 1802 clear_warning_flags(); 1803 for2(); 1804 end_declaration_level(); 1805 block_level--; 1806 } 1807 ; 1808 1809 while_expr: /* see C99 6.8.5 */ 1810 T_WHILE T_LPAREN expression T_RPAREN { 1811 while1($3); 1812 clear_warning_flags(); 1813 } 1814 ; 1815 1816 do_statement: /* see C99 6.8.5 */ 1817 do statement { 1818 clear_warning_flags(); 1819 } 1820 ; 1821 1822 do: /* see C99 6.8.5 */ 1823 T_DO { 1824 do1(); 1825 } 1826 ; 1827 1828 do_while_expr: /* see C99 6.8.5 */ 1829 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1830 $$ = $3; 1831 } 1832 ; 1833 1834 for_start: /* see C99 6.8.5 */ 1835 T_FOR T_LPAREN { 1836 begin_declaration_level(AUTO); 1837 block_level++; 1838 } 1839 ; 1840 1841 for_exprs: /* see C99 6.8.5 */ 1842 for_start 1843 begin_type_declaration_specifiers end_type 1844 notype_init_declarators T_SEMI 1845 expression_opt T_SEMI expression_opt T_RPAREN { 1846 /* variable declaration in for loop */ 1847 c99ism(325); 1848 for1(NULL, $6, $8); 1849 clear_warning_flags(); 1850 } 1851 | for_start 1852 expression_opt T_SEMI 1853 expression_opt T_SEMI 1854 expression_opt T_RPAREN { 1855 for1($2, $4, $6); 1856 clear_warning_flags(); 1857 } 1858 ; 1859 1860 jump_statement: /* C99 6.8.6 */ 1861 goto identifier T_SEMI { 1862 do_goto(getsym($2)); 1863 } 1864 | goto error T_SEMI { 1865 symtyp = FVFT; 1866 } 1867 | T_CONTINUE T_SEMI { 1868 do_continue(); 1869 } 1870 | T_BREAK T_SEMI { 1871 do_break(); 1872 } 1873 | T_RETURN sys T_SEMI { 1874 do_return($2, NULL); 1875 } 1876 | T_RETURN sys expression T_SEMI { 1877 do_return($2, $3); 1878 } 1879 ; 1880 1881 goto: /* see C99 6.8.6 */ 1882 T_GOTO { 1883 symtyp = FLABEL; 1884 } 1885 ; 1886 1887 asm_statement: /* GCC extension */ 1888 T_ASM T_LPAREN read_until_rparen T_SEMI { 1889 setasm(); 1890 } 1891 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1892 setasm(); 1893 } 1894 | T_ASM error 1895 ; 1896 1897 read_until_rparen: /* helper for 'asm_statement' */ 1898 /* empty */ { 1899 read_until_rparen(); 1900 } 1901 ; 1902 1903 translation_unit: /* C99 6.9 */ 1904 external_declaration 1905 | translation_unit external_declaration 1906 ; 1907 1908 external_declaration: /* C99 6.9 */ 1909 function_definition { 1910 global_clean_up_decl(false); 1911 clear_warning_flags(); 1912 } 1913 | top_level_declaration { 1914 global_clean_up_decl(false); 1915 clear_warning_flags(); 1916 } 1917 | asm_statement /* GCC extension */ 1918 | T_SEMI { /* GCC extension */ 1919 if (sflag) { 1920 /* empty declaration */ 1921 error(0); 1922 } else if (!tflag) { 1923 /* empty declaration */ 1924 warning(0); 1925 } 1926 } 1927 ; 1928 1929 /* 1930 * On the top level, lint allows several forms of declarations that it doesn't 1931 * allow in functions. For example, a single ';' is an empty declaration and 1932 * is supported by some compilers, but in a function it would be an empty 1933 * statement, not a declaration. This makes a difference in C90 mode, where 1934 * a statement must not be followed by a declaration. 1935 * 1936 * See 'declaration' for all other declarations. 1937 */ 1938 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1939 begin_type end_type notype_init_declarators T_SEMI { 1940 if (sflag) { 1941 /* old style declaration; add 'int' */ 1942 error(1); 1943 } else if (!tflag) { 1944 /* old style declaration; add 'int' */ 1945 warning(1); 1946 } 1947 } 1948 | declaration 1949 | error T_SEMI { 1950 global_clean_up(); 1951 } 1952 | error T_RBRACE { 1953 global_clean_up(); 1954 } 1955 ; 1956 1957 function_definition: /* C99 6.9.1 */ 1958 func_declarator { 1959 if ($1->s_type->t_tspec != FUNC) { 1960 /* syntax error '%s' */ 1961 error(249, yytext); 1962 YYERROR; 1963 } 1964 if ($1->s_type->t_typedef) { 1965 /* ()-less function definition */ 1966 error(64); 1967 YYERROR; 1968 } 1969 funcdef($1); 1970 block_level++; 1971 begin_declaration_level(ARG); 1972 if (lwarn == LWARN_NONE) 1973 $1->s_used = true; 1974 } arg_declaration_list_opt { 1975 end_declaration_level(); 1976 block_level--; 1977 check_func_lint_directives(); 1978 check_func_old_style_arguments(); 1979 begin_control_statement(CS_FUNCTION_BODY); 1980 } compound_statement { 1981 funcend(); 1982 end_control_statement(CS_FUNCTION_BODY); 1983 } 1984 ; 1985 1986 func_declarator: 1987 begin_type end_type notype_declarator { 1988 /* ^^ There is no check for the missing type-specifier. */ 1989 $$ = $3; 1990 } 1991 | begin_type_declmods end_type notype_declarator { 1992 /* ^^ There is no check for the missing type-specifier. */ 1993 $$ = $3; 1994 } 1995 | begin_type_declaration_specifiers end_type type_declarator { 1996 $$ = $3; 1997 } 1998 ; 1999 2000 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 2001 /* empty */ 2002 | arg_declaration_list 2003 ; 2004 2005 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2006 arg_declaration 2007 | arg_declaration_list arg_declaration 2008 /* XXX or better "arg_declaration error" ? */ 2009 | error 2010 ; 2011 2012 /* 2013 * "arg_declaration" is separated from "declaration" because it 2014 * needs other error handling. 2015 */ 2016 arg_declaration: 2017 begin_type_declmods end_type T_SEMI { 2018 /* empty declaration */ 2019 warning(2); 2020 } 2021 | begin_type_declmods end_type notype_init_declarators T_SEMI 2022 | begin_type_declaration_specifiers end_type T_SEMI { 2023 if (!dcs->d_nonempty_decl) { 2024 /* empty declaration */ 2025 warning(2); 2026 } else { 2027 /* '%s' declared in argument declaration list */ 2028 warning(3, type_name(dcs->d_type)); 2029 } 2030 } 2031 | begin_type_declaration_specifiers end_type 2032 type_init_declarators T_SEMI { 2033 if (dcs->d_nonempty_decl) { 2034 /* '%s' declared in argument declaration list */ 2035 warning(3, type_name(dcs->d_type)); 2036 } 2037 } 2038 | begin_type_declmods error 2039 | begin_type_declaration_specifiers error 2040 ; 2041 2042 gcc_attribute_list_opt: 2043 /* empty */ 2044 | gcc_attribute_list 2045 ; 2046 2047 gcc_attribute_list: 2048 gcc_attribute 2049 | gcc_attribute_list gcc_attribute 2050 ; 2051 2052 gcc_attribute: 2053 T_ATTRIBUTE T_LPAREN T_LPAREN { 2054 in_gcc_attribute = true; 2055 } gcc_attribute_spec_list { 2056 in_gcc_attribute = false; 2057 } T_RPAREN T_RPAREN 2058 ; 2059 2060 gcc_attribute_spec_list: 2061 gcc_attribute_spec 2062 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2063 ; 2064 2065 gcc_attribute_spec: 2066 /* empty */ 2067 | T_AT_ALWAYS_INLINE 2068 | T_AT_ALIAS T_LPAREN string T_RPAREN 2069 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2070 | T_AT_ALIGNED 2071 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2072 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2073 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2074 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2075 | T_AT_COLD 2076 | T_AT_COMMON 2077 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2078 | T_AT_CONSTRUCTOR 2079 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2080 | T_AT_DEPRECATED 2081 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2082 | T_AT_DESTRUCTOR 2083 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2084 | T_AT_FALLTHROUGH { 2085 fallthru(1); 2086 } 2087 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2088 constant_expr T_COMMA constant_expr T_RPAREN 2089 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2090 | T_AT_GNU_INLINE 2091 | T_AT_HOT 2092 | T_AT_MALLOC 2093 | T_AT_MAY_ALIAS 2094 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2095 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2096 | T_AT_NO_SANITIZE_THREAD 2097 | T_AT_NOINLINE 2098 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2099 | T_AT_NONNULL 2100 | T_AT_NONSTRING 2101 | T_AT_NORETURN 2102 | T_AT_NOTHROW 2103 | T_AT_NO_INSTRUMENT_FUNCTION 2104 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2105 | T_AT_OPTNONE 2106 | T_AT_PACKED { 2107 addpacked(); 2108 } 2109 | T_AT_PCS T_LPAREN string T_RPAREN 2110 | T_AT_PURE 2111 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2112 | T_AT_RETURNS_NONNULL 2113 | T_AT_RETURNS_TWICE 2114 | T_AT_SECTION T_LPAREN string T_RPAREN 2115 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2116 | T_AT_SENTINEL 2117 | T_AT_TARGET T_LPAREN string T_RPAREN 2118 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2119 | T_AT_TUNION 2120 | T_AT_UNUSED { 2121 add_attr_used(); 2122 } 2123 | T_AT_USED { 2124 add_attr_used(); 2125 } 2126 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2127 | T_AT_WARN_UNUSED_RESULT 2128 | T_AT_WEAK 2129 | T_QUAL { 2130 if ($1 != CONST) 2131 yyerror("Bad attribute"); 2132 } 2133 ; 2134 2135 gcc_attribute_bounded: 2136 T_AT_MINBYTES 2137 | T_AT_STRING 2138 | T_AT_BUFFER 2139 ; 2140 2141 gcc_attribute_format: 2142 T_AT_FORMAT_GNU_PRINTF 2143 | T_AT_FORMAT_PRINTF 2144 | T_AT_FORMAT_SCANF 2145 | T_AT_FORMAT_STRFMON 2146 | T_AT_FORMAT_STRFTIME 2147 | T_AT_FORMAT_SYSLOG 2148 ; 2149 2150 sys: 2151 /* empty */ { 2152 $$ = in_system_header; 2153 } 2154 ; 2155 2156 %% 2157 2158 /* ARGSUSED */ 2159 int 2160 yyerror(const char *msg) 2161 { 2162 /* syntax error '%s' */ 2163 error(249, yytext); 2164 if (++sytxerr >= 5) 2165 norecover(); 2166 return 0; 2167 } 2168 2169 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2170 || (defined(YYDEBUG) && defined(YYBISON)) 2171 static const char * 2172 cgram_to_string(int token, YYSTYPE val) 2173 { 2174 static const char *tqual_name[] = { 2175 "const", "volatile", "restrict", "_Thread_local" 2176 }; 2177 2178 switch (token) { 2179 case T_INCDEC: 2180 case T_MULTIPLICATIVE: 2181 case T_ADDITIVE: 2182 case T_SHIFT: 2183 case T_RELATIONAL: 2184 case T_EQUALITY: 2185 case T_OPASSIGN: 2186 return modtab[val.y_op].m_name; 2187 case T_SCLASS: 2188 return scl_name(val.y_scl); 2189 case T_TYPE: 2190 case T_STRUCT_OR_UNION: 2191 return tspec_name(val.y_tspec); 2192 case T_QUAL: 2193 return tqual_name[val.y_tqual]; 2194 case T_NAME: 2195 return val.y_name->sb_name; 2196 default: 2197 return "<none>"; 2198 } 2199 } 2200 #endif 2201 2202 #if defined(YYDEBUG) && defined(YYBISON) 2203 static inline void 2204 cgram_print(FILE *output, int token, YYSTYPE val) 2205 { 2206 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2207 } 2208 #endif 2209 2210 static void 2211 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2212 { 2213 declare(decl, initflg, renaming); 2214 if (renaming != NULL) 2215 freeyyv(&renaming, T_NAME); 2216 } 2217 2218 /* 2219 * Discard all input tokens up to and including the next 2220 * unmatched right paren 2221 */ 2222 static void 2223 read_until_rparen(void) 2224 { 2225 int level; 2226 2227 if (yychar < 0) 2228 yychar = yylex(); 2229 freeyyv(&yylval, yychar); 2230 2231 level = 1; 2232 while (yychar != T_RPAREN || --level > 0) { 2233 if (yychar == T_LPAREN) { 2234 level++; 2235 } else if (yychar <= 0) { 2236 break; 2237 } 2238 freeyyv(&yylval, yychar = yylex()); 2239 } 2240 2241 yyclearin; 2242 } 2243 2244 static sym_t * 2245 symbolrename(sym_t *s, sbuf_t *sb) 2246 { 2247 if (sb != NULL) 2248 s->s_rename = sb->sb_name; 2249 return s; 2250 } 2251
Indexes created Fri Oct 03 02:09:57 GMT 2025