cgram.y revision 1.375
1 %{ 2 /* $NetBSD: cgram.y,v 1.375 2021/12/16 23:46:21 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 1.375 2021/12/16 23:46:21 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_PACKED 255 %token T_AT_PCS 256 %token T_AT_PURE 257 %token T_AT_REGPARM 258 %token T_AT_RETURNS_NONNULL 259 %token T_AT_RETURNS_TWICE 260 %token T_AT_SECTION 261 %token T_AT_SENTINEL 262 %token T_AT_STRING 263 %token T_AT_TARGET 264 %token T_AT_TLS_MODEL 265 %token T_AT_TUNION 266 %token T_AT_UNUSED 267 %token T_AT_USED 268 %token T_AT_VISIBILITY 269 %token T_AT_WARN_UNUSED_RESULT 270 %token T_AT_WEAK 271 272 %left T_THEN 273 %left T_ELSE 274 %right T_QUEST T_COLON 275 %left T_LOGOR 276 %left T_LOGAND 277 %left T_BITOR 278 %left T_BITXOR 279 %left T_AMPER 280 %left T_EQUALITY 281 %left T_RELATIONAL 282 %left T_SHIFT 283 %left T_ADDITIVE 284 %left T_ASTERISK T_MULTIPLICATIVE 285 286 %token <y_name> T_NAME 287 %token <y_name> T_TYPENAME 288 %token <y_val> T_CON 289 %token <y_string> T_STRING 290 291 %type <y_sym> identifier_sym 292 %type <y_name> identifier 293 %type <y_string> string 294 %type <y_string> string2 295 296 %type <y_tnode> primary_expression 297 %type <y_tnode> generic_selection 298 %type <y_generic> generic_assoc_list 299 %type <y_generic> generic_association 300 %type <y_tnode> postfix_expression 301 %type <y_tnode> gcc_statement_expr_list 302 %type <y_tnode> gcc_statement_expr_item 303 %type <y_op> point_or_arrow 304 %type <y_tnode> argument_expression_list 305 %type <y_tnode> unary_expression 306 %type <y_tnode> cast_expression 307 %type <y_tnode> conditional_expression 308 %type <y_tnode> assignment_expression 309 %type <y_tnode> expression_opt 310 %type <y_tnode> expression 311 %type <y_tnode> constant_expr 312 313 %type <y_type> begin_type_typespec 314 %type <y_type> type_specifier 315 %type <y_type> notype_type_specifier 316 %type <y_type> struct_or_union_specifier 317 %type <y_tspec> struct_or_union 318 %type <y_sym> braced_struct_declaration_list 319 %type <y_sym> struct_declaration_list_with_rbrace 320 %type <y_sym> struct_declaration_list 321 %type <y_sym> struct_declaration 322 %type <y_sym> notype_struct_declarators 323 %type <y_sym> type_struct_declarators 324 %type <y_sym> notype_struct_declarator 325 %type <y_sym> type_struct_declarator 326 %type <y_type> enum_specifier 327 %type <y_sym> enum_declaration 328 %type <y_sym> enums_with_opt_comma 329 %type <y_sym> enumerator_list 330 %type <y_sym> enumerator 331 %type <y_qual_ptr> type_qualifier 332 %type <y_qual_ptr> pointer 333 %type <y_qual_ptr> asterisk 334 %type <y_qual_ptr> type_qualifier_list_opt 335 %type <y_qual_ptr> type_qualifier_list 336 %type <y_sym> notype_declarator 337 %type <y_sym> type_declarator 338 %type <y_sym> notype_direct_declarator 339 %type <y_sym> type_direct_declarator 340 %type <y_sym> type_param_declarator 341 %type <y_sym> notype_param_declarator 342 %type <y_sym> direct_param_declarator 343 %type <y_sym> direct_notype_param_declarator 344 %type <y_sym> param_list 345 %type <y_array_size> array_size_opt 346 %type <y_tnode> array_size 347 %type <y_sym> identifier_list 348 %type <y_type> type_name 349 %type <y_sym> abstract_declaration 350 %type <y_sym> abstract_declarator 351 %type <y_sym> direct_abstract_declarator 352 %type <y_sym> abstract_decl_param_list 353 %type <y_sym> vararg_parameter_type_list 354 %type <y_sym> parameter_type_list 355 %type <y_sym> parameter_declaration 356 %type <y_range> range 357 %type <y_name> asm_or_symbolrename_opt 358 359 %type <y_seen_statement> block_item_list 360 %type <y_seen_statement> block_item 361 %type <y_tnode> do_while_expr 362 %type <y_sym> func_declarator 363 %type <y_in_system_header> sys 364 365 %{ 366 #if defined(YYDEBUG) && defined(YYBISON) 367 static inline void cgram_print(FILE *, int, YYSTYPE); 368 #endif 369 %} 370 371 %% 372 373 program: 374 /* empty */ { 375 if (sflag) { 376 /* empty translation unit */ 377 error(272); 378 } else if (!tflag) { 379 /* empty translation unit */ 380 warning(272); 381 } 382 } 383 | translation_unit 384 ; 385 386 identifier_sym: /* helper for struct/union/enum */ 387 identifier { 388 $$ = getsym($1); 389 } 390 ; 391 392 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 393 identifier: 394 T_NAME { 395 debug_step("cgram: name '%s'", $1->sb_name); 396 $$ = $1; 397 } 398 | T_TYPENAME { 399 debug_step("cgram: typename '%s'", $1->sb_name); 400 $$ = $1; 401 } 402 ; 403 404 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 405 string: 406 T_STRING 407 | T_STRING string2 { 408 $$ = cat_strings($1, $2); 409 } 410 ; 411 412 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 413 string2: 414 T_STRING { 415 if (tflag) { 416 /* concatenated strings are illegal in traditional C */ 417 warning(219); 418 } 419 $$ = $1; 420 } 421 | string2 T_STRING { 422 $$ = cat_strings($1, $2); 423 } 424 ; 425 426 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 427 primary_expression: 428 T_NAME { 429 bool sys_name, sys_next; 430 sys_name = in_system_header; 431 if (yychar < 0) 432 yychar = yylex(); 433 sys_next = in_system_header; 434 in_system_header = sys_name; 435 $$ = build_name(getsym($1), yychar == T_LPAREN); 436 in_system_header = sys_next; 437 } 438 | T_CON { 439 $$ = build_constant(gettyp($1->v_tspec), $1); 440 } 441 | string { 442 $$ = build_string($1); 443 } 444 | T_LPAREN expression T_RPAREN { 445 if ($2 != NULL) 446 $2->tn_parenthesized = true; 447 $$ = $2; 448 } 449 | generic_selection 450 /* GCC primary-expression, see c_parser_postfix_expression */ 451 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 452 symtyp = FMEMBER; 453 $$ = build_offsetof($3, getsym($5)); 454 } 455 ; 456 457 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 458 generic_selection: 459 T_GENERIC T_LPAREN assignment_expression T_COMMA 460 generic_assoc_list T_RPAREN { 461 /* generic selection requires C11 or later */ 462 c11ism(345); 463 $$ = build_generic_selection($3, $5); 464 } 465 ; 466 467 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 468 generic_assoc_list: 469 generic_association 470 | generic_assoc_list T_COMMA generic_association { 471 $3->ga_prev = $1; 472 $$ = $3; 473 } 474 ; 475 476 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 477 generic_association: 478 type_name T_COLON assignment_expression { 479 $$ = getblk(sizeof(*$$)); 480 $$->ga_arg = $1; 481 $$->ga_result = $3; 482 } 483 | T_DEFAULT T_COLON assignment_expression { 484 $$ = getblk(sizeof(*$$)); 485 $$->ga_arg = NULL; 486 $$->ga_result = $3; 487 } 488 ; 489 490 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 491 postfix_expression: 492 primary_expression 493 | postfix_expression T_LBRACK sys expression T_RBRACK { 494 $$ = build_unary(INDIR, $3, build_binary($1, PLUS, $3, $4)); 495 } 496 | postfix_expression T_LPAREN sys T_RPAREN { 497 $$ = build_function_call($1, $3, NULL); 498 } 499 | postfix_expression T_LPAREN sys argument_expression_list T_RPAREN { 500 $$ = build_function_call($1, $3, $4); 501 } 502 | postfix_expression point_or_arrow sys T_NAME { 503 $$ = build_member_access($1, $2, $3, $4); 504 } 505 | postfix_expression T_INCDEC sys { 506 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $3, $1); 507 } 508 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 509 sym_t *tmp = mktempsym($2); 510 begin_initialization(tmp); 511 cgram_declare(tmp, true, NULL); 512 } init_lbrace initializer_list comma_opt init_rbrace { 513 if (!Sflag) 514 /* compound literals are a C9X/GCC extension */ 515 gnuism(319); 516 $$ = build_name(*current_initsym(), false); 517 end_initialization(); 518 } 519 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 520 block_level--; 521 mem_block_level--; 522 begin_initialization(mktempsym(dup_type($3->tn_type))); 523 mem_block_level++; 524 block_level++; 525 /* ({ }) is a GCC extension */ 526 gnuism(320); 527 } compound_statement_rbrace T_RPAREN { 528 $$ = build_name(*current_initsym(), false); 529 end_initialization(); 530 } 531 ; 532 533 comma_opt: /* helper for 'postfix_expression' */ 534 /* empty */ 535 | T_COMMA 536 ; 537 538 /* 539 * The inner part of a GCC statement-expression of the form ({ ... }). 540 * 541 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 542 */ 543 gcc_statement_expr_list: 544 gcc_statement_expr_item 545 | gcc_statement_expr_list gcc_statement_expr_item { 546 $$ = $2; 547 } 548 ; 549 550 gcc_statement_expr_item: 551 declaration_or_error { 552 clear_warning_flags(); 553 $$ = NULL; 554 } 555 | non_expr_statement { 556 $$ = expr_zalloc_tnode(); 557 $$->tn_type = gettyp(VOID); 558 } 559 | expression T_SEMI { 560 if ($1 == NULL) { /* in case of syntax errors */ 561 $$ = expr_zalloc_tnode(); 562 $$->tn_type = gettyp(VOID); 563 } else { 564 /* XXX: do that only on the last name */ 565 if ($1->tn_op == NAME) 566 $1->tn_sym->s_used = true; 567 expr($1, false, false, false, false); 568 seen_fallthrough = false; 569 $$ = $1; 570 } 571 } 572 ; 573 574 point_or_arrow: /* helper for 'postfix_expression' */ 575 T_POINT { 576 symtyp = FMEMBER; 577 $$ = POINT; 578 } 579 | T_ARROW { 580 symtyp = FMEMBER; 581 $$ = ARROW; 582 } 583 ; 584 585 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 586 argument_expression_list: 587 assignment_expression { 588 $$ = build_function_argument(NULL, $1); 589 } 590 | argument_expression_list T_COMMA assignment_expression { 591 $$ = build_function_argument($1, $3); 592 } 593 ; 594 595 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 596 unary_expression: 597 postfix_expression 598 | T_INCDEC sys unary_expression { 599 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2, $3); 600 } 601 | T_AMPER sys cast_expression { 602 $$ = build_unary(ADDR, $2, $3); 603 } 604 | T_ASTERISK sys cast_expression { 605 $$ = build_unary(INDIR, $2, $3); 606 } 607 | T_ADDITIVE sys cast_expression { 608 if (tflag && $1 == PLUS) { 609 /* unary + is illegal in traditional C */ 610 warning(100); 611 } 612 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2, $3); 613 } 614 | T_COMPLEMENT sys cast_expression { 615 $$ = build_unary(COMPL, $2, $3); 616 } 617 | T_LOGNOT sys cast_expression { 618 $$ = build_unary(NOT, $2, $3); 619 } 620 | T_REAL sys cast_expression { /* GCC c_parser_unary_expression */ 621 $$ = build_unary(REAL, $2, $3); 622 } 623 | T_IMAG sys cast_expression { /* GCC c_parser_unary_expression */ 624 $$ = build_unary(IMAG, $2, $3); 625 } 626 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 627 $$ = $2; 628 } 629 | T_SIZEOF unary_expression { 630 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 631 if ($$ != NULL) 632 check_expr_misc($2, 633 false, false, false, false, false, true); 634 } 635 | T_SIZEOF T_LPAREN type_name T_RPAREN { 636 $$ = build_sizeof($3); 637 } 638 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 639 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 640 /* TODO: c11ism */ 641 $$ = build_alignof($3); 642 } 643 ; 644 645 /* The rule 'unary_operator' is inlined into unary_expression. */ 646 647 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 648 cast_expression: 649 unary_expression 650 | T_LPAREN type_name T_RPAREN cast_expression { 651 $$ = cast($4, $2); 652 } 653 ; 654 655 expression_opt: 656 /* empty */ { 657 $$ = NULL; 658 } 659 | expression 660 ; 661 662 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 663 /* 'conditional_expression' also implements 'additive_expression'. */ 664 /* 'conditional_expression' also implements 'shift_expression'. */ 665 /* 'conditional_expression' also implements 'relational_expression'. */ 666 /* 'conditional_expression' also implements 'equality_expression'. */ 667 /* 'conditional_expression' also implements 'AND_expression'. */ 668 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 669 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 670 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 671 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 672 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 673 conditional_expression: 674 cast_expression 675 | conditional_expression T_ASTERISK sys conditional_expression { 676 $$ = build_binary($1, MULT, $3, $4); 677 } 678 | conditional_expression T_MULTIPLICATIVE sys conditional_expression { 679 $$ = build_binary($1, $2, $3, $4); 680 } 681 | conditional_expression T_ADDITIVE sys conditional_expression { 682 $$ = build_binary($1, $2, $3, $4); 683 } 684 | conditional_expression T_SHIFT sys conditional_expression { 685 $$ = build_binary($1, $2, $3, $4); 686 } 687 | conditional_expression T_RELATIONAL sys conditional_expression { 688 $$ = build_binary($1, $2, $3, $4); 689 } 690 | conditional_expression T_EQUALITY sys conditional_expression { 691 $$ = build_binary($1, $2, $3, $4); 692 } 693 | conditional_expression T_AMPER sys conditional_expression { 694 $$ = build_binary($1, BITAND, $3, $4); 695 } 696 | conditional_expression T_BITXOR sys conditional_expression { 697 $$ = build_binary($1, BITXOR, $3, $4); 698 } 699 | conditional_expression T_BITOR sys conditional_expression { 700 $$ = build_binary($1, BITOR, $3, $4); 701 } 702 | conditional_expression T_LOGAND sys conditional_expression { 703 $$ = build_binary($1, LOGAND, $3, $4); 704 } 705 | conditional_expression T_LOGOR sys conditional_expression { 706 $$ = build_binary($1, LOGOR, $3, $4); 707 } 708 | conditional_expression T_QUEST sys 709 expression T_COLON sys conditional_expression { 710 $$ = build_binary($1, QUEST, $3, 711 build_binary($4, COLON, $6, $7)); 712 } 713 ; 714 715 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 716 assignment_expression: 717 conditional_expression 718 | unary_expression T_ASSIGN sys assignment_expression { 719 $$ = build_binary($1, ASSIGN, $3, $4); 720 } 721 | unary_expression T_OPASSIGN sys assignment_expression { 722 $$ = build_binary($1, $2, $3, $4); 723 } 724 ; 725 726 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 727 expression: 728 assignment_expression 729 | expression T_COMMA sys assignment_expression { 730 $$ = build_binary($1, COMMA, $3, $4); 731 } 732 ; 733 734 constant_expr_list_opt: /* helper for gcc_attribute */ 735 /* empty */ 736 | constant_expr_list 737 ; 738 739 constant_expr_list: /* helper for gcc_attribute */ 740 constant_expr 741 | constant_expr_list T_COMMA constant_expr 742 ; 743 744 constant_expr: /* C99 6.6 */ 745 conditional_expression 746 ; 747 748 declaration_or_error: 749 declaration 750 | error T_SEMI 751 ; 752 753 declaration: /* C99 6.7 */ 754 begin_type_declmods end_type T_SEMI { 755 if (dcs->d_scl == TYPEDEF) { 756 /* typedef declares no type name */ 757 warning(72); 758 } else { 759 /* empty declaration */ 760 warning(2); 761 } 762 } 763 | begin_type_declmods end_type notype_init_declarators T_SEMI 764 /* ^^ There is no check for the missing type-specifier. */ 765 | begin_type_declaration_specifiers end_type T_SEMI { 766 if (dcs->d_scl == TYPEDEF) { 767 /* typedef declares no type name */ 768 warning(72); 769 } else if (!dcs->d_nonempty_decl) { 770 /* empty declaration */ 771 warning(2); 772 } 773 } 774 | begin_type_declaration_specifiers end_type 775 type_init_declarators T_SEMI 776 | static_assert_declaration 777 ; 778 779 begin_type_declaration_specifiers: /* see C99 6.7 */ 780 begin_type_typespec { 781 add_type($1); 782 } 783 | begin_type_declmods type_specifier { 784 add_type($2); 785 } 786 | type_attribute begin_type_declaration_specifiers 787 | begin_type_declaration_specifiers declmod 788 | begin_type_declaration_specifiers notype_type_specifier { 789 add_type($2); 790 } 791 ; 792 793 begin_type_declmods: /* see C99 6.7 */ 794 begin_type T_QUAL { 795 add_qualifier($2); 796 } 797 | begin_type T_SCLASS { 798 add_storage_class($2); 799 } 800 | begin_type_declmods declmod 801 ; 802 803 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 804 begin_type_specifier_qualifier_list_postfix 805 | type_attribute_list begin_type_specifier_qualifier_list_postfix 806 ; 807 808 begin_type_specifier_qualifier_list_postfix: 809 begin_type_typespec { 810 add_type($1); 811 } 812 | begin_type_qualifier_list type_specifier { 813 add_type($2); 814 } 815 | begin_type_specifier_qualifier_list_postfix T_QUAL { 816 add_qualifier($2); 817 } 818 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 819 add_type($2); 820 } 821 | begin_type_specifier_qualifier_list_postfix type_attribute 822 ; 823 824 begin_type_typespec: 825 begin_type notype_type_specifier { 826 $$ = $2; 827 } 828 | T_TYPENAME begin_type { 829 $$ = getsym($1)->s_type; 830 } 831 ; 832 833 begin_type_qualifier_list: 834 begin_type T_QUAL { 835 add_qualifier($2); 836 } 837 | begin_type_qualifier_list T_QUAL { 838 add_qualifier($2); 839 } 840 ; 841 842 declmod: 843 T_QUAL { 844 add_qualifier($1); 845 } 846 | T_SCLASS { 847 add_storage_class($1); 848 } 849 | type_attribute_list 850 ; 851 852 type_attribute_list: 853 type_attribute 854 | type_attribute_list type_attribute 855 ; 856 857 type_attribute_opt: 858 /* empty */ 859 | type_attribute 860 ; 861 862 type_attribute: /* See C11 6.7 declaration-specifiers */ 863 gcc_attribute 864 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 865 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 866 | T_PACKED { 867 addpacked(); 868 } 869 | T_NORETURN 870 ; 871 872 begin_type: 873 /* empty */ { 874 begin_type(); 875 } 876 ; 877 878 end_type: 879 /* empty */ { 880 end_type(); 881 } 882 ; 883 884 type_specifier: /* C99 6.7.2 */ 885 notype_type_specifier 886 | T_TYPENAME { 887 $$ = getsym($1)->s_type; 888 } 889 ; 890 891 notype_type_specifier: /* see C99 6.7.2 */ 892 T_TYPE { 893 $$ = gettyp($1); 894 } 895 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 896 $$ = $3->tn_type; 897 } 898 | struct_or_union_specifier { 899 end_declaration_level(); 900 $$ = $1; 901 } 902 | enum_specifier { 903 end_declaration_level(); 904 $$ = $1; 905 } 906 ; 907 908 struct_or_union_specifier: /* C99 6.7.2.1 */ 909 struct_or_union identifier_sym { 910 /* 911 * STDC requires that "struct a;" always introduces 912 * a new tag if "a" is not declared at current level 913 * 914 * yychar is valid because otherwise the parser would not 915 * have been able to decide if it must shift or reduce 916 */ 917 $$ = mktag($2, $1, false, yychar == T_SEMI); 918 } 919 | struct_or_union identifier_sym { 920 dcs->d_tagtyp = mktag($2, $1, true, false); 921 } braced_struct_declaration_list { 922 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 923 } 924 | struct_or_union { 925 dcs->d_tagtyp = mktag(NULL, $1, true, false); 926 } braced_struct_declaration_list { 927 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 928 } 929 | struct_or_union error { 930 symtyp = FVFT; 931 $$ = gettyp(INT); 932 } 933 ; 934 935 struct_or_union: /* C99 6.7.2.1 */ 936 T_STRUCT_OR_UNION { 937 symtyp = FTAG; 938 begin_declaration_level($1 == STRUCT ? MOS : MOU); 939 dcs->d_offset = 0; 940 dcs->d_sou_align_in_bits = CHAR_SIZE; 941 $$ = $1; 942 } 943 | struct_or_union type_attribute 944 ; 945 946 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 947 struct_declaration_lbrace struct_declaration_list_with_rbrace { 948 $$ = $2; 949 } 950 ; 951 952 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 953 T_LBRACE { 954 symtyp = FVFT; 955 } 956 ; 957 958 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 959 struct_declaration_list T_RBRACE 960 | T_RBRACE { 961 /* XXX: This is not allowed by any C standard. */ 962 $$ = NULL; 963 } 964 ; 965 966 struct_declaration_list: /* C99 6.7.2.1 */ 967 struct_declaration 968 | struct_declaration_list struct_declaration { 969 $$ = lnklst($1, $2); 970 } 971 ; 972 973 struct_declaration: /* C99 6.7.2.1 */ 974 begin_type_qualifier_list end_type { 975 /* ^^ There is no check for the missing type-specifier. */ 976 /* too late, i know, but getsym() compensates it */ 977 symtyp = FMEMBER; 978 } notype_struct_declarators type_attribute_opt T_SEMI { 979 symtyp = FVFT; 980 $$ = $4; 981 } 982 | begin_type_specifier_qualifier_list end_type { 983 symtyp = FMEMBER; 984 } type_struct_declarators type_attribute_opt T_SEMI { 985 symtyp = FVFT; 986 $$ = $4; 987 } 988 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 989 /* syntax error '%s' */ 990 error(249, "member without type"); 991 $$ = NULL; 992 } 993 | begin_type_specifier_qualifier_list end_type type_attribute_opt 994 T_SEMI { 995 symtyp = FVFT; 996 if (!Sflag) 997 /* anonymous struct/union members is a C9X feature */ 998 warning(49); 999 if (is_struct_or_union(dcs->d_type->t_tspec)) { 1000 $$ = dcs->d_type->t_str->sou_first_member; 1001 /* add all the members of the anonymous struct/union */ 1002 anonymize($$); 1003 } else { 1004 /* syntax error '%s' */ 1005 error(249, "unnamed member"); 1006 $$ = NULL; 1007 } 1008 } 1009 | static_assert_declaration { 1010 $$ = NULL; 1011 } 1012 | error T_SEMI { 1013 symtyp = FVFT; 1014 $$ = NULL; 1015 } 1016 ; 1017 1018 notype_struct_declarators: 1019 notype_struct_declarator { 1020 $$ = declarator_1_struct_union($1); 1021 } 1022 | notype_struct_declarators { 1023 symtyp = FMEMBER; 1024 } T_COMMA type_struct_declarator { 1025 $$ = lnklst($1, declarator_1_struct_union($4)); 1026 } 1027 ; 1028 1029 type_struct_declarators: 1030 type_struct_declarator { 1031 $$ = declarator_1_struct_union($1); 1032 } 1033 | type_struct_declarators { 1034 symtyp = FMEMBER; 1035 } T_COMMA type_struct_declarator { 1036 $$ = lnklst($1, declarator_1_struct_union($4)); 1037 } 1038 ; 1039 1040 notype_struct_declarator: 1041 notype_declarator 1042 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1043 $$ = bitfield($1, to_int_constant($3, true)); 1044 } 1045 | { 1046 symtyp = FVFT; 1047 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1048 $$ = bitfield(NULL, to_int_constant($3, true)); 1049 } 1050 ; 1051 1052 type_struct_declarator: 1053 type_declarator 1054 | type_declarator T_COLON constant_expr { 1055 $$ = bitfield($1, to_int_constant($3, true)); 1056 } 1057 | { 1058 symtyp = FVFT; 1059 } T_COLON constant_expr { 1060 $$ = bitfield(NULL, to_int_constant($3, true)); 1061 } 1062 ; 1063 1064 enum_specifier: /* C99 6.7.2.2 */ 1065 enum gcc_attribute_list_opt identifier_sym { 1066 $$ = mktag($3, ENUM, false, false); 1067 } 1068 | enum gcc_attribute_list_opt identifier_sym { 1069 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1070 } enum_declaration /*gcc_attribute_list_opt*/ { 1071 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1072 } 1073 | enum gcc_attribute_list_opt { 1074 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1075 } enum_declaration /*gcc_attribute_list_opt*/ { 1076 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1077 } 1078 | enum error { 1079 symtyp = FVFT; 1080 $$ = gettyp(INT); 1081 } 1082 ; 1083 1084 enum: /* helper for C99 6.7.2.2 */ 1085 T_ENUM { 1086 symtyp = FTAG; 1087 begin_declaration_level(CTCONST); 1088 } 1089 ; 1090 1091 enum_declaration: /* helper for C99 6.7.2.2 */ 1092 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1093 $$ = $2; 1094 } 1095 ; 1096 1097 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1098 T_LBRACE { 1099 symtyp = FVFT; 1100 enumval = 0; 1101 } 1102 ; 1103 1104 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1105 enumerator_list 1106 | enumerator_list T_COMMA { 1107 if (sflag) { 1108 /* trailing ',' prohibited in enum declaration */ 1109 error(54); 1110 } else { 1111 /* trailing ',' prohibited in enum declaration */ 1112 c99ism(54); 1113 } 1114 $$ = $1; 1115 } 1116 ; 1117 1118 enumerator_list: /* C99 6.7.2.2 */ 1119 enumerator 1120 | enumerator_list T_COMMA enumerator { 1121 $$ = lnklst($1, $3); 1122 } 1123 | error { 1124 $$ = NULL; 1125 } 1126 ; 1127 1128 enumerator: /* C99 6.7.2.2 */ 1129 identifier_sym gcc_attribute_list_opt { 1130 $$ = enumeration_constant($1, enumval, true); 1131 } 1132 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1133 $$ = enumeration_constant($1, to_int_constant($4, true), 1134 false); 1135 } 1136 ; 1137 1138 type_qualifier: /* C99 6.7.3 */ 1139 T_QUAL { 1140 $$ = xcalloc(1, sizeof(*$$)); 1141 if ($1 == CONST) 1142 $$->p_const = true; 1143 if ($1 == VOLATILE) 1144 $$->p_volatile = true; 1145 } 1146 ; 1147 1148 pointer: /* C99 6.7.5 */ 1149 asterisk type_qualifier_list_opt { 1150 $$ = merge_qualified_pointer($1, $2); 1151 } 1152 | asterisk type_qualifier_list_opt pointer { 1153 $$ = merge_qualified_pointer($1, $2); 1154 $$ = merge_qualified_pointer($$, $3); 1155 } 1156 ; 1157 1158 asterisk: /* helper for 'pointer' */ 1159 T_ASTERISK { 1160 $$ = xcalloc(1, sizeof(*$$)); 1161 $$->p_pointer = true; 1162 } 1163 ; 1164 1165 type_qualifier_list_opt: /* see C99 6.7.5 */ 1166 /* empty */ { 1167 $$ = NULL; 1168 } 1169 | type_qualifier_list 1170 ; 1171 1172 type_qualifier_list: /* C99 6.7.5 */ 1173 type_qualifier 1174 | type_qualifier_list type_qualifier { 1175 $$ = merge_qualified_pointer($1, $2); 1176 } 1177 ; 1178 1179 /* 1180 * For an explanation of 'notype' in the following rules, see 1181 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1182 */ 1183 1184 notype_init_declarators: 1185 notype_init_declarator 1186 | notype_init_declarators T_COMMA type_init_declarator 1187 ; 1188 1189 type_init_declarators: 1190 type_init_declarator 1191 | type_init_declarators T_COMMA type_init_declarator 1192 ; 1193 1194 notype_init_declarator: 1195 notype_declarator asm_or_symbolrename_opt { 1196 cgram_declare($1, false, $2); 1197 check_size($1); 1198 } 1199 | notype_declarator asm_or_symbolrename_opt { 1200 begin_initialization($1); 1201 cgram_declare($1, true, $2); 1202 } T_ASSIGN initializer { 1203 check_size($1); 1204 end_initialization(); 1205 } 1206 ; 1207 1208 type_init_declarator: 1209 type_declarator asm_or_symbolrename_opt { 1210 cgram_declare($1, false, $2); 1211 check_size($1); 1212 } 1213 | type_declarator asm_or_symbolrename_opt { 1214 begin_initialization($1); 1215 cgram_declare($1, true, $2); 1216 } T_ASSIGN initializer { 1217 check_size($1); 1218 end_initialization(); 1219 } 1220 ; 1221 1222 notype_declarator: 1223 notype_direct_declarator 1224 | pointer notype_direct_declarator { 1225 $$ = add_pointer($2, $1); 1226 } 1227 ; 1228 1229 type_declarator: 1230 type_direct_declarator 1231 | pointer type_direct_declarator { 1232 $$ = add_pointer($2, $1); 1233 } 1234 ; 1235 1236 notype_direct_declarator: 1237 T_NAME { 1238 $$ = declarator_name(getsym($1)); 1239 } 1240 | T_LPAREN type_declarator T_RPAREN { 1241 $$ = $2; 1242 } 1243 | type_attribute notype_direct_declarator { 1244 $$ = $2; 1245 } 1246 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1247 $$ = add_array($1, $3.has_dim, $3.dim); 1248 } 1249 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1250 $$ = add_function(symbolrename($1, $3), $2); 1251 end_declaration_level(); 1252 block_level--; 1253 } 1254 | notype_direct_declarator type_attribute 1255 ; 1256 1257 type_direct_declarator: 1258 identifier { 1259 $$ = declarator_name(getsym($1)); 1260 } 1261 | T_LPAREN type_declarator T_RPAREN { 1262 $$ = $2; 1263 } 1264 | type_attribute type_direct_declarator { 1265 $$ = $2; 1266 } 1267 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1268 $$ = add_array($1, $3.has_dim, $3.dim); 1269 } 1270 | type_direct_declarator param_list asm_or_symbolrename_opt { 1271 $$ = add_function(symbolrename($1, $3), $2); 1272 end_declaration_level(); 1273 block_level--; 1274 } 1275 | type_direct_declarator type_attribute 1276 ; 1277 1278 /* 1279 * The two distinct rules type_param_declarator and notype_param_declarator 1280 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1281 * always treated as a typename, not an argument name. For example, after 1282 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1283 * "f(int (double));", not "f(int a);". 1284 */ 1285 type_param_declarator: 1286 direct_param_declarator 1287 | pointer direct_param_declarator { 1288 $$ = add_pointer($2, $1); 1289 } 1290 ; 1291 1292 notype_param_declarator: 1293 direct_notype_param_declarator 1294 | pointer direct_notype_param_declarator { 1295 $$ = add_pointer($2, $1); 1296 } 1297 ; 1298 1299 direct_param_declarator: 1300 identifier type_attribute_list { 1301 $$ = declarator_name(getsym($1)); 1302 } 1303 | identifier { 1304 $$ = declarator_name(getsym($1)); 1305 } 1306 | T_LPAREN notype_param_declarator T_RPAREN { 1307 $$ = $2; 1308 } 1309 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1310 gcc_attribute_list_opt { 1311 $$ = add_array($1, $3.has_dim, $3.dim); 1312 } 1313 | direct_param_declarator param_list asm_or_symbolrename_opt { 1314 $$ = add_function(symbolrename($1, $3), $2); 1315 end_declaration_level(); 1316 block_level--; 1317 } 1318 ; 1319 1320 direct_notype_param_declarator: 1321 identifier { 1322 $$ = declarator_name(getsym($1)); 1323 } 1324 | T_LPAREN notype_param_declarator T_RPAREN { 1325 $$ = $2; 1326 } 1327 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1328 $$ = add_array($1, $3.has_dim, $3.dim); 1329 } 1330 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1331 $$ = add_function(symbolrename($1, $3), $2); 1332 end_declaration_level(); 1333 block_level--; 1334 } 1335 ; 1336 1337 param_list: 1338 id_list_lparen identifier_list T_RPAREN { 1339 $$ = $2; 1340 } 1341 | abstract_decl_param_list 1342 ; 1343 1344 id_list_lparen: 1345 T_LPAREN { 1346 block_level++; 1347 begin_declaration_level(PROTO_ARG); 1348 } 1349 ; 1350 1351 array_size_opt: 1352 /* empty */ { 1353 $$.has_dim = false; 1354 $$.dim = 0; 1355 } 1356 | T_ASTERISK { 1357 /* since C99; variable length array of unspecified size */ 1358 $$.has_dim = false; /* TODO: maybe change to true */ 1359 $$.dim = 0; /* just as a placeholder */ 1360 } 1361 | array_size { 1362 $$.has_dim = true; 1363 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1364 } 1365 ; 1366 1367 array_size: 1368 type_qualifier_list_opt T_SCLASS constant_expr { 1369 /* C11 6.7.6.3p7 */ 1370 if ($2 != STATIC) 1371 yyerror("Bad attribute"); 1372 /* static array size is a C11 extension */ 1373 c11ism(343); 1374 $$ = $3; 1375 } 1376 | T_QUAL { 1377 /* C11, 6.7.6.2 */ 1378 if ($1 != RESTRICT) 1379 yyerror("Bad attribute"); 1380 $$ = NULL; 1381 } 1382 | constant_expr 1383 ; 1384 1385 identifier_list: /* C99 6.7.5 */ 1386 T_NAME { 1387 $$ = old_style_function_name(getsym($1)); 1388 } 1389 | identifier_list T_COMMA T_NAME { 1390 $$ = lnklst($1, old_style_function_name(getsym($3))); 1391 } 1392 | identifier_list error 1393 ; 1394 1395 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1396 type_name: /* C99 6.7.6 */ 1397 { 1398 begin_declaration_level(ABSTRACT); 1399 } abstract_declaration { 1400 end_declaration_level(); 1401 $$ = $2->s_type; 1402 } 1403 ; 1404 1405 abstract_declaration: /* specific to lint */ 1406 begin_type_qualifier_list end_type { 1407 $$ = declare_1_abstract(abstract_name()); 1408 } 1409 | begin_type_specifier_qualifier_list end_type { 1410 $$ = declare_1_abstract(abstract_name()); 1411 } 1412 | begin_type_qualifier_list end_type abstract_declarator { 1413 $$ = declare_1_abstract($3); 1414 } 1415 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1416 $$ = declare_1_abstract($3); 1417 } 1418 ; 1419 1420 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1421 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1422 abstract_declarator: 1423 pointer { 1424 $$ = add_pointer(abstract_name(), $1); 1425 } 1426 | direct_abstract_declarator 1427 | pointer direct_abstract_declarator { 1428 $$ = add_pointer($2, $1); 1429 } 1430 ; 1431 1432 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1433 direct_abstract_declarator: 1434 /* TODO: sort rules according to C99 */ 1435 T_LPAREN abstract_declarator T_RPAREN { 1436 $$ = $2; 1437 } 1438 | T_LBRACK array_size_opt T_RBRACK { 1439 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1440 } 1441 | type_attribute direct_abstract_declarator { 1442 $$ = $2; 1443 } 1444 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1445 $$ = add_array($1, $3.has_dim, $3.dim); 1446 } 1447 | abstract_decl_param_list asm_or_symbolrename_opt { 1448 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1449 end_declaration_level(); 1450 block_level--; 1451 } 1452 | direct_abstract_declarator abstract_decl_param_list 1453 asm_or_symbolrename_opt { 1454 $$ = add_function(symbolrename($1, $3), $2); 1455 end_declaration_level(); 1456 block_level--; 1457 } 1458 | direct_abstract_declarator type_attribute_list 1459 ; 1460 1461 abstract_decl_param_list: /* specific to lint */ 1462 abstract_decl_lparen T_RPAREN type_attribute_opt { 1463 $$ = NULL; 1464 } 1465 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1466 type_attribute_opt { 1467 dcs->d_proto = true; 1468 $$ = $2; 1469 } 1470 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1471 $$ = NULL; 1472 } 1473 ; 1474 1475 abstract_decl_lparen: /* specific to lint */ 1476 T_LPAREN { 1477 block_level++; 1478 begin_declaration_level(PROTO_ARG); 1479 } 1480 ; 1481 1482 vararg_parameter_type_list: /* specific to lint */ 1483 parameter_type_list 1484 | parameter_type_list T_COMMA T_ELLIPSIS { 1485 dcs->d_vararg = true; 1486 $$ = $1; 1487 } 1488 | T_ELLIPSIS { 1489 if (sflag) { 1490 /* ANSI C requires formal parameter before '...' */ 1491 error(84); 1492 } else if (!tflag) { 1493 /* ANSI C requires formal parameter before '...' */ 1494 warning(84); 1495 } 1496 dcs->d_vararg = true; 1497 $$ = NULL; 1498 } 1499 ; 1500 1501 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1502 parameter_type_list: 1503 parameter_declaration 1504 | parameter_type_list T_COMMA parameter_declaration { 1505 $$ = lnklst($1, $3); 1506 } 1507 ; 1508 1509 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1510 parameter_declaration: 1511 begin_type_declmods end_type { 1512 /* ^^ There is no check for the missing type-specifier. */ 1513 $$ = declare_argument(abstract_name(), false); 1514 } 1515 | begin_type_declaration_specifiers end_type { 1516 $$ = declare_argument(abstract_name(), false); 1517 } 1518 | begin_type_declmods end_type notype_param_declarator { 1519 /* ^^ There is no check for the missing type-specifier. */ 1520 $$ = declare_argument($3, false); 1521 } 1522 /* 1523 * type_param_declarator is needed because of following conflict: 1524 * "typedef int a; f(int (a));" could be parsed as 1525 * "function with argument a of type int", or 1526 * "function with an abstract argument of type function". 1527 * This grammar realizes the second case. 1528 */ 1529 | begin_type_declaration_specifiers end_type type_param_declarator { 1530 $$ = declare_argument($3, false); 1531 } 1532 | begin_type_declmods end_type abstract_declarator { 1533 /* ^^ There is no check for the missing type-specifier. */ 1534 $$ = declare_argument($3, false); 1535 } 1536 | begin_type_declaration_specifiers end_type abstract_declarator { 1537 $$ = declare_argument($3, false); 1538 } 1539 ; 1540 1541 initializer: /* C99 6.7.8 "Initialization" */ 1542 assignment_expression { 1543 init_expr($1); 1544 } 1545 | init_lbrace init_rbrace { 1546 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1547 } 1548 | init_lbrace initializer_list comma_opt init_rbrace 1549 /* XXX: What is this error handling for? */ 1550 | error 1551 ; 1552 1553 initializer_list: /* C99 6.7.8 "Initialization" */ 1554 initializer_list_item 1555 | initializer_list T_COMMA initializer_list_item 1556 ; 1557 1558 initializer_list_item: /* helper */ 1559 designation initializer 1560 | initializer 1561 ; 1562 1563 designation: /* C99 6.7.8 "Initialization" */ 1564 designator_list T_ASSIGN 1565 | identifier T_COLON { 1566 /* GCC style struct or union member name in initializer */ 1567 gnuism(315); 1568 add_designator_member($1); 1569 } 1570 ; 1571 1572 designator_list: /* C99 6.7.8 "Initialization" */ 1573 designator 1574 | designator_list designator 1575 ; 1576 1577 designator: /* C99 6.7.8 "Initialization" */ 1578 T_LBRACK range T_RBRACK { 1579 add_designator_subscript($2); 1580 if (!Sflag) 1581 /* array initializer with designators is a C9X ... */ 1582 warning(321); 1583 } 1584 | T_POINT identifier { 1585 if (!Sflag) 1586 /* struct or union member name in initializer is ... */ 1587 warning(313); 1588 add_designator_member($2); 1589 } 1590 ; 1591 1592 static_assert_declaration: 1593 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1594 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1595 ; 1596 1597 range: 1598 constant_expr { 1599 $$.lo = to_int_constant($1, true); 1600 $$.hi = $$.lo; 1601 } 1602 | constant_expr T_ELLIPSIS constant_expr { 1603 $$.lo = to_int_constant($1, true); 1604 $$.hi = to_int_constant($3, true); 1605 /* initialization with '[a...b]' is a GCC extension */ 1606 gnuism(340); 1607 } 1608 ; 1609 1610 init_lbrace: /* helper */ 1611 T_LBRACE { 1612 init_lbrace(); 1613 } 1614 ; 1615 1616 init_rbrace: /* helper */ 1617 T_RBRACE { 1618 init_rbrace(); 1619 } 1620 ; 1621 1622 asm_or_symbolrename_opt: /* GCC extensions */ 1623 /* empty */ { 1624 $$ = NULL; 1625 } 1626 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1627 freeyyv(&$3, T_STRING); 1628 $$ = NULL; 1629 } 1630 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1631 $$ = $3; 1632 } 1633 ; 1634 1635 statement: /* C99 6.8 */ 1636 expression_statement 1637 | non_expr_statement 1638 ; 1639 1640 non_expr_statement: /* helper for C99 6.8 */ 1641 type_attribute T_SEMI 1642 | labeled_statement 1643 | compound_statement 1644 | selection_statement 1645 | iteration_statement 1646 | jump_statement { 1647 seen_fallthrough = false; 1648 } 1649 | asm_statement 1650 ; 1651 1652 labeled_statement: /* C99 6.8.1 */ 1653 label type_attribute_opt statement 1654 ; 1655 1656 label: 1657 T_NAME T_COLON { 1658 symtyp = FLABEL; 1659 named_label(getsym($1)); 1660 } 1661 | T_CASE constant_expr T_COLON { 1662 case_label($2); 1663 seen_fallthrough = true; 1664 } 1665 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1666 /* XXX: We don't fill all cases */ 1667 case_label($2); 1668 seen_fallthrough = true; 1669 } 1670 | T_DEFAULT T_COLON { 1671 default_label(); 1672 seen_fallthrough = true; 1673 } 1674 ; 1675 1676 compound_statement: /* C99 6.8.2 */ 1677 compound_statement_lbrace compound_statement_rbrace 1678 | compound_statement_lbrace block_item_list compound_statement_rbrace 1679 ; 1680 1681 compound_statement_lbrace: 1682 T_LBRACE { 1683 block_level++; 1684 mem_block_level++; 1685 begin_declaration_level(AUTO); 1686 } 1687 ; 1688 1689 compound_statement_rbrace: 1690 T_RBRACE { 1691 end_declaration_level(); 1692 freeblk(); 1693 mem_block_level--; 1694 block_level--; 1695 seen_fallthrough = false; 1696 } 1697 ; 1698 1699 block_item_list: /* C99 6.8.2 */ 1700 block_item 1701 | block_item_list block_item { 1702 if (!Sflag && $1 && !$2) 1703 /* declarations after statements is a C99 feature */ 1704 c99ism(327); 1705 $$ = $1 || $2; 1706 } 1707 ; 1708 1709 block_item: /* C99 6.8.2 */ 1710 declaration_or_error { 1711 $$ = false; 1712 restore_warning_flags(); 1713 } 1714 | statement { 1715 $$ = true; 1716 restore_warning_flags(); 1717 } 1718 ; 1719 1720 expression_statement: /* C99 6.8.3 */ 1721 expression T_SEMI { 1722 expr($1, false, false, false, false); 1723 seen_fallthrough = false; 1724 } 1725 | T_SEMI { 1726 seen_fallthrough = false; 1727 } 1728 ; 1729 1730 selection_statement: /* C99 6.8.4 */ 1731 if_without_else %prec T_THEN { 1732 save_warning_flags(); 1733 if2(); 1734 if3(false); 1735 } 1736 | if_without_else T_ELSE { 1737 save_warning_flags(); 1738 if2(); 1739 } statement { 1740 clear_warning_flags(); 1741 if3(true); 1742 } 1743 | if_without_else T_ELSE error { 1744 clear_warning_flags(); 1745 if3(false); 1746 } 1747 | switch_expr statement { 1748 clear_warning_flags(); 1749 switch2(); 1750 } 1751 | switch_expr error { 1752 clear_warning_flags(); 1753 switch2(); 1754 } 1755 ; 1756 1757 if_without_else: /* see C99 6.8.4 */ 1758 if_expr statement 1759 | if_expr error 1760 ; 1761 1762 if_expr: /* see C99 6.8.4 */ 1763 T_IF T_LPAREN expression T_RPAREN { 1764 if1($3); 1765 clear_warning_flags(); 1766 } 1767 ; 1768 1769 switch_expr: /* see C99 6.8.4 */ 1770 T_SWITCH T_LPAREN expression T_RPAREN { 1771 switch1($3); 1772 clear_warning_flags(); 1773 } 1774 ; 1775 1776 iteration_statement: /* C99 6.8.5 */ 1777 while_expr statement { 1778 clear_warning_flags(); 1779 while2(); 1780 } 1781 | while_expr error { 1782 clear_warning_flags(); 1783 while2(); 1784 } 1785 | do_statement do_while_expr { 1786 do2($2); 1787 seen_fallthrough = false; 1788 } 1789 | do error { 1790 clear_warning_flags(); 1791 do2(NULL); 1792 } 1793 | for_exprs statement { 1794 clear_warning_flags(); 1795 for2(); 1796 end_declaration_level(); 1797 block_level--; 1798 } 1799 | for_exprs error { 1800 clear_warning_flags(); 1801 for2(); 1802 end_declaration_level(); 1803 block_level--; 1804 } 1805 ; 1806 1807 while_expr: /* see C99 6.8.5 */ 1808 T_WHILE T_LPAREN expression T_RPAREN { 1809 while1($3); 1810 clear_warning_flags(); 1811 } 1812 ; 1813 1814 do_statement: /* see C99 6.8.5 */ 1815 do statement { 1816 clear_warning_flags(); 1817 } 1818 ; 1819 1820 do: /* see C99 6.8.5 */ 1821 T_DO { 1822 do1(); 1823 } 1824 ; 1825 1826 do_while_expr: /* see C99 6.8.5 */ 1827 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1828 $$ = $3; 1829 } 1830 ; 1831 1832 for_start: /* see C99 6.8.5 */ 1833 T_FOR T_LPAREN { 1834 begin_declaration_level(AUTO); 1835 block_level++; 1836 } 1837 ; 1838 1839 for_exprs: /* see C99 6.8.5 */ 1840 for_start 1841 begin_type_declaration_specifiers end_type 1842 notype_init_declarators T_SEMI 1843 expression_opt T_SEMI expression_opt T_RPAREN { 1844 /* variable declaration in for loop */ 1845 c99ism(325); 1846 for1(NULL, $6, $8); 1847 clear_warning_flags(); 1848 } 1849 | for_start 1850 expression_opt T_SEMI 1851 expression_opt T_SEMI 1852 expression_opt T_RPAREN { 1853 for1($2, $4, $6); 1854 clear_warning_flags(); 1855 } 1856 ; 1857 1858 jump_statement: /* C99 6.8.6 */ 1859 goto identifier T_SEMI { 1860 do_goto(getsym($2)); 1861 } 1862 | goto error T_SEMI { 1863 symtyp = FVFT; 1864 } 1865 | T_CONTINUE T_SEMI { 1866 do_continue(); 1867 } 1868 | T_BREAK T_SEMI { 1869 do_break(); 1870 } 1871 | T_RETURN sys T_SEMI { 1872 do_return($2, NULL); 1873 } 1874 | T_RETURN sys expression T_SEMI { 1875 do_return($2, $3); 1876 } 1877 ; 1878 1879 goto: /* see C99 6.8.6 */ 1880 T_GOTO { 1881 symtyp = FLABEL; 1882 } 1883 ; 1884 1885 asm_statement: /* GCC extension */ 1886 T_ASM T_LPAREN read_until_rparen T_SEMI { 1887 setasm(); 1888 } 1889 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1890 setasm(); 1891 } 1892 | T_ASM error 1893 ; 1894 1895 read_until_rparen: /* helper for 'asm_statement' */ 1896 /* empty */ { 1897 read_until_rparen(); 1898 } 1899 ; 1900 1901 translation_unit: /* C99 6.9 */ 1902 external_declaration 1903 | translation_unit external_declaration 1904 ; 1905 1906 external_declaration: /* C99 6.9 */ 1907 function_definition { 1908 global_clean_up_decl(false); 1909 clear_warning_flags(); 1910 } 1911 | top_level_declaration { 1912 global_clean_up_decl(false); 1913 clear_warning_flags(); 1914 } 1915 | asm_statement /* GCC extension */ 1916 | T_SEMI { /* GCC extension */ 1917 if (sflag) { 1918 /* empty declaration */ 1919 error(0); 1920 } else if (!tflag) { 1921 /* empty declaration */ 1922 warning(0); 1923 } 1924 } 1925 ; 1926 1927 /* 1928 * On the top level, lint allows several forms of declarations that it doesn't 1929 * allow in functions. For example, a single ';' is an empty declaration and 1930 * is supported by some compilers, but in a function it would be an empty 1931 * statement, not a declaration. This makes a difference in C90 mode, where 1932 * a statement must not be followed by a declaration. 1933 * 1934 * See 'declaration' for all other declarations. 1935 */ 1936 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1937 begin_type end_type notype_init_declarators T_SEMI { 1938 if (sflag) { 1939 /* old style declaration; add 'int' */ 1940 error(1); 1941 } else if (!tflag) { 1942 /* old style declaration; add 'int' */ 1943 warning(1); 1944 } 1945 } 1946 | declaration 1947 | error T_SEMI { 1948 global_clean_up(); 1949 } 1950 | error T_RBRACE { 1951 global_clean_up(); 1952 } 1953 ; 1954 1955 function_definition: /* C99 6.9.1 */ 1956 func_declarator { 1957 if ($1->s_type->t_tspec != FUNC) { 1958 /* syntax error '%s' */ 1959 error(249, yytext); 1960 YYERROR; 1961 } 1962 if ($1->s_type->t_typedef) { 1963 /* ()-less function definition */ 1964 error(64); 1965 YYERROR; 1966 } 1967 funcdef($1); 1968 block_level++; 1969 begin_declaration_level(ARG); 1970 if (lwarn == LWARN_NONE) 1971 $1->s_used = true; 1972 } arg_declaration_list_opt { 1973 end_declaration_level(); 1974 block_level--; 1975 check_func_lint_directives(); 1976 check_func_old_style_arguments(); 1977 begin_control_statement(CS_FUNCTION_BODY); 1978 } compound_statement { 1979 funcend(); 1980 end_control_statement(CS_FUNCTION_BODY); 1981 } 1982 ; 1983 1984 func_declarator: 1985 begin_type end_type notype_declarator { 1986 /* ^^ There is no check for the missing type-specifier. */ 1987 $$ = $3; 1988 } 1989 | begin_type_declmods end_type notype_declarator { 1990 /* ^^ There is no check for the missing type-specifier. */ 1991 $$ = $3; 1992 } 1993 | begin_type_declaration_specifiers end_type type_declarator { 1994 $$ = $3; 1995 } 1996 ; 1997 1998 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1999 /* empty */ 2000 | arg_declaration_list 2001 ; 2002 2003 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2004 arg_declaration 2005 | arg_declaration_list arg_declaration 2006 /* XXX or better "arg_declaration error" ? */ 2007 | error 2008 ; 2009 2010 /* 2011 * "arg_declaration" is separated from "declaration" because it 2012 * needs other error handling. 2013 */ 2014 arg_declaration: 2015 begin_type_declmods end_type T_SEMI { 2016 /* empty declaration */ 2017 warning(2); 2018 } 2019 | begin_type_declmods end_type notype_init_declarators T_SEMI 2020 | begin_type_declaration_specifiers end_type T_SEMI { 2021 if (!dcs->d_nonempty_decl) { 2022 /* empty declaration */ 2023 warning(2); 2024 } else { 2025 /* '%s' declared in argument declaration list */ 2026 warning(3, type_name(dcs->d_type)); 2027 } 2028 } 2029 | begin_type_declaration_specifiers end_type 2030 type_init_declarators T_SEMI { 2031 if (dcs->d_nonempty_decl) { 2032 /* '%s' declared in argument declaration list */ 2033 warning(3, type_name(dcs->d_type)); 2034 } 2035 } 2036 | begin_type_declmods error 2037 | begin_type_declaration_specifiers error 2038 ; 2039 2040 gcc_attribute_list_opt: 2041 /* empty */ 2042 | gcc_attribute_list 2043 ; 2044 2045 gcc_attribute_list: 2046 gcc_attribute 2047 | gcc_attribute_list gcc_attribute 2048 ; 2049 2050 gcc_attribute: 2051 T_ATTRIBUTE T_LPAREN T_LPAREN { 2052 in_gcc_attribute = true; 2053 } gcc_attribute_spec_list { 2054 in_gcc_attribute = false; 2055 } T_RPAREN T_RPAREN 2056 ; 2057 2058 gcc_attribute_spec_list: 2059 gcc_attribute_spec 2060 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2061 ; 2062 2063 gcc_attribute_spec: 2064 /* empty */ 2065 | T_AT_ALWAYS_INLINE 2066 | T_AT_ALIAS T_LPAREN string T_RPAREN 2067 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2068 | T_AT_ALIGNED 2069 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2070 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2071 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2072 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2073 | T_AT_COLD 2074 | T_AT_COMMON 2075 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2076 | T_AT_CONSTRUCTOR 2077 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2078 | T_AT_DEPRECATED 2079 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2080 | T_AT_DESTRUCTOR 2081 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2082 | T_AT_FALLTHROUGH { 2083 fallthru(1); 2084 } 2085 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2086 constant_expr T_COMMA constant_expr T_RPAREN 2087 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2088 | T_AT_GNU_INLINE 2089 | T_AT_HOT 2090 | T_AT_MALLOC 2091 | T_AT_MAY_ALIAS 2092 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2093 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2094 | T_AT_NO_SANITIZE_THREAD 2095 | T_AT_NOINLINE 2096 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2097 | T_AT_NONNULL 2098 | T_AT_NONSTRING 2099 | T_AT_NORETURN 2100 | T_AT_NOTHROW 2101 | T_AT_NO_INSTRUMENT_FUNCTION 2102 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2103 | T_AT_PACKED { 2104 addpacked(); 2105 } 2106 | T_AT_PCS T_LPAREN string T_RPAREN 2107 | T_AT_PURE 2108 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2109 | T_AT_RETURNS_NONNULL 2110 | T_AT_RETURNS_TWICE 2111 | T_AT_SECTION T_LPAREN string T_RPAREN 2112 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2113 | T_AT_SENTINEL 2114 | T_AT_TARGET T_LPAREN string T_RPAREN 2115 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2116 | T_AT_TUNION 2117 | T_AT_UNUSED { 2118 add_attr_used(); 2119 } 2120 | T_AT_USED { 2121 add_attr_used(); 2122 } 2123 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2124 | T_AT_WARN_UNUSED_RESULT 2125 | T_AT_WEAK 2126 | T_QUAL { 2127 if ($1 != CONST) 2128 yyerror("Bad attribute"); 2129 } 2130 ; 2131 2132 gcc_attribute_bounded: 2133 T_AT_MINBYTES 2134 | T_AT_STRING 2135 | T_AT_BUFFER 2136 ; 2137 2138 gcc_attribute_format: 2139 T_AT_FORMAT_GNU_PRINTF 2140 | T_AT_FORMAT_PRINTF 2141 | T_AT_FORMAT_SCANF 2142 | T_AT_FORMAT_STRFMON 2143 | T_AT_FORMAT_STRFTIME 2144 | T_AT_FORMAT_SYSLOG 2145 ; 2146 2147 sys: 2148 /* empty */ { 2149 $$ = in_system_header; 2150 } 2151 ; 2152 2153 %% 2154 2155 /* ARGSUSED */ 2156 int 2157 yyerror(const char *msg) 2158 { 2159 /* syntax error '%s' */ 2160 error(249, yytext); 2161 if (++sytxerr >= 5) 2162 norecover(); 2163 return 0; 2164 } 2165 2166 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2167 || (defined(YYDEBUG) && defined(YYBISON)) 2168 static const char * 2169 cgram_to_string(int token, YYSTYPE val) 2170 { 2171 static const char *tqual_name[] = { 2172 "const", "volatile", "restrict", "_Thread_local" 2173 }; 2174 2175 switch (token) { 2176 case T_INCDEC: 2177 case T_MULTIPLICATIVE: 2178 case T_ADDITIVE: 2179 case T_SHIFT: 2180 case T_RELATIONAL: 2181 case T_EQUALITY: 2182 case T_OPASSIGN: 2183 return modtab[val.y_op].m_name; 2184 case T_SCLASS: 2185 return scl_name(val.y_scl); 2186 case T_TYPE: 2187 case T_STRUCT_OR_UNION: 2188 return tspec_name(val.y_tspec); 2189 case T_QUAL: 2190 return tqual_name[val.y_tqual]; 2191 case T_NAME: 2192 return val.y_name->sb_name; 2193 default: 2194 return "<none>"; 2195 } 2196 } 2197 #endif 2198 2199 #if defined(YYDEBUG) && defined(YYBISON) 2200 static inline void 2201 cgram_print(FILE *output, int token, YYSTYPE val) 2202 { 2203 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2204 } 2205 #endif 2206 2207 static void 2208 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2209 { 2210 declare(decl, initflg, renaming); 2211 if (renaming != NULL) 2212 freeyyv(&renaming, T_NAME); 2213 } 2214 2215 /* 2216 * Discard all input tokens up to and including the next 2217 * unmatched right paren 2218 */ 2219 static void 2220 read_until_rparen(void) 2221 { 2222 int level; 2223 2224 if (yychar < 0) 2225 yychar = yylex(); 2226 freeyyv(&yylval, yychar); 2227 2228 level = 1; 2229 while (yychar != T_RPAREN || --level > 0) { 2230 if (yychar == T_LPAREN) { 2231 level++; 2232 } else if (yychar <= 0) { 2233 break; 2234 } 2235 freeyyv(&yylval, yychar = yylex()); 2236 } 2237 2238 yyclearin; 2239 } 2240 2241 static sym_t * 2242 symbolrename(sym_t *s, sbuf_t *sb) 2243 { 2244 if (sb != NULL) 2245 s->s_rename = sb->sb_name; 2246 return s; 2247 } 2248
Indexes created Thu Oct 02 14:10:14 GMT 2025