cgram.y revision 1.389
1 %{ 2 /* $NetBSD: cgram.y,v 1.389 2022/04/09 13:38:17 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 1.389 2022/04/09 13:38:17 rillig Exp $"); 39 #endif 40 41 #include <limits.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "lint1.h" 46 47 extern char *yytext; 48 49 /* 50 * Contains the level of current declaration, used for symbol table entries. 51 * 0 is the top-level, > 0 is inside a function body. 52 */ 53 int block_level; 54 55 /* 56 * level for memory allocation. Normally the same as block_level. 57 * An exception is the declaration of arguments in prototypes. Memory 58 * for these can't be freed after the declaration, but symbols must 59 * be removed from the symbol table after the declaration. 60 */ 61 size_t mem_block_level; 62 63 /* 64 * Save the no-warns state and restore it to avoid the problem where 65 * if (expr) { stmt } / * NOLINT * / stmt; 66 */ 67 static int olwarn = LWARN_BAD; 68 69 static void cgram_declare(sym_t *, bool, sbuf_t *); 70 static void read_until_rparen(void); 71 static sym_t *symbolrename(sym_t *, sbuf_t *); 72 73 74 #ifdef DEBUG 75 static void 76 CLEAR_WARN_FLAGS(const char *file, size_t line) 77 { 78 debug_step("%s:%zu: clearing flags", file, line); 79 clear_warn_flags(); 80 olwarn = LWARN_BAD; 81 } 82 83 static void 84 SAVE_WARN_FLAGS(const char *file, size_t line) 85 { 86 lint_assert(olwarn == LWARN_BAD); 87 debug_step("%s:%zu: saving flags %d", file, line, lwarn); 88 olwarn = lwarn; 89 } 90 91 static void 92 RESTORE_WARN_FLAGS(const char *file, size_t line) 93 { 94 if (olwarn != LWARN_BAD) { 95 lwarn = olwarn; 96 debug_step("%s:%zu: restoring flags %d", file, line, lwarn); 97 olwarn = LWARN_BAD; 98 } else 99 CLEAR_WARN_FLAGS(file, line); 100 } 101 #else 102 #define CLEAR_WARN_FLAGS(f, l) clear_warn_flags(), olwarn = LWARN_BAD 103 #define SAVE_WARN_FLAGS(f, l) olwarn = lwarn 104 #define RESTORE_WARN_FLAGS(f, l) \ 105 (void)(olwarn == LWARN_BAD ? (clear_warn_flags(), 0) : (lwarn = olwarn)) 106 #endif 107 108 #define clear_warning_flags() CLEAR_WARN_FLAGS(__FILE__, __LINE__) 109 #define save_warning_flags() SAVE_WARN_FLAGS(__FILE__, __LINE__) 110 #define restore_warning_flags() RESTORE_WARN_FLAGS(__FILE__, __LINE__) 111 112 /* unbind the anonymous struct members from the struct */ 113 static void 114 anonymize(sym_t *s) 115 { 116 for ( ; s != NULL; s = s->s_next) 117 s->u.s_sou_type = NULL; 118 } 119 120 #if defined(YYDEBUG) && (defined(YYBYACC) || defined(YYBISON)) 121 #define YYSTYPE_TOSTRING cgram_to_string 122 #endif 123 #if defined(YYDEBUG) && defined(YYBISON) 124 #define YYPRINT cgram_print 125 #endif 126 127 %} 128 129 %expect 150 130 131 %union { 132 val_t *y_val; 133 sbuf_t *y_name; 134 sym_t *y_sym; 135 op_t y_op; 136 scl_t y_scl; 137 tspec_t y_tspec; 138 tqual_t y_tqual; 139 type_t *y_type; 140 tnode_t *y_tnode; 141 range_t y_range; 142 strg_t *y_string; 143 qual_ptr *y_qual_ptr; 144 bool y_seen_statement; 145 struct generic_association *y_generic; 146 struct array_size y_array_size; 147 bool y_in_system_header; 148 }; 149 150 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 151 %token T_POINT T_ARROW 152 %token T_COMPLEMENT T_LOGNOT 153 %token <y_op> T_INCDEC 154 %token T_SIZEOF 155 %token T_BUILTIN_OFFSETOF 156 %token T_TYPEOF 157 %token T_EXTENSION 158 %token T_ALIGNAS 159 %token T_ALIGNOF 160 %token T_ASTERISK 161 %token <y_op> T_MULTIPLICATIVE 162 %token <y_op> T_ADDITIVE 163 %token <y_op> T_SHIFT 164 %token <y_op> T_RELATIONAL 165 %token <y_op> T_EQUALITY 166 %token T_AMPER 167 %token T_BITXOR 168 %token T_BITOR 169 %token T_LOGAND 170 %token T_LOGOR 171 %token T_QUEST 172 %token T_COLON 173 %token T_ASSIGN 174 %token <y_op> T_OPASSIGN 175 %token T_COMMA 176 %token T_SEMI 177 %token T_ELLIPSIS 178 %token T_REAL 179 %token T_IMAG 180 %token T_GENERIC 181 %token T_NORETURN 182 183 /* storage classes (extern, static, auto, register and typedef) */ 184 %token <y_scl> T_SCLASS 185 186 /* 187 * predefined type keywords (char, int, short, long, unsigned, signed, 188 * float, double, void); see T_TYPENAME for types from typedef 189 */ 190 %token <y_tspec> T_TYPE 191 192 /* qualifiers (const, volatile, restrict, _Thread_local) */ 193 %token <y_tqual> T_QUAL 194 195 /* struct or union */ 196 %token <y_tspec> T_STRUCT_OR_UNION 197 198 /* remaining keywords */ 199 %token T_ASM 200 %token T_BREAK 201 %token T_CASE 202 %token T_CONTINUE 203 %token T_DEFAULT 204 %token T_DO 205 %token T_ELSE 206 %token T_ENUM 207 %token T_FOR 208 %token T_GOTO 209 %token T_IF 210 %token T_PACKED 211 %token T_RETURN 212 %token T_SWITCH 213 %token T_SYMBOLRENAME 214 %token T_WHILE 215 %token T_STATIC_ASSERT 216 217 %token T_ATTRIBUTE 218 %token T_AT_ALIAS 219 %token T_AT_ALIGNED 220 %token T_AT_ALLOC_SIZE 221 %token T_AT_ALWAYS_INLINE 222 %token T_AT_BOUNDED 223 %token T_AT_BUFFER 224 %token T_AT_COLD 225 %token T_AT_COMMON 226 %token T_AT_CONSTRUCTOR 227 %token T_AT_DEPRECATED 228 %token T_AT_DESTRUCTOR 229 %token T_AT_DISABLE_SANITIZER_INSTRUMENTATION 230 %token T_AT_FALLTHROUGH 231 %token T_AT_FORMAT 232 %token T_AT_FORMAT_ARG 233 %token T_AT_FORMAT_GNU_PRINTF 234 %token T_AT_FORMAT_PRINTF 235 %token T_AT_FORMAT_SCANF 236 %token T_AT_FORMAT_STRFMON 237 %token T_AT_FORMAT_STRFTIME 238 %token T_AT_FORMAT_SYSLOG 239 %token T_AT_GNU_INLINE 240 %token T_AT_HOT 241 %token T_AT_MALLOC 242 %token T_AT_MAY_ALIAS 243 %token T_AT_MINBYTES 244 %token T_AT_MODE 245 %token T_AT_NO_SANITIZE 246 %token T_AT_NO_SANITIZE_THREAD 247 %token T_AT_NOINLINE 248 %token T_AT_NONNULL 249 %token T_AT_NONSTRING 250 %token T_AT_NORETURN 251 %token T_AT_NOTHROW 252 %token T_AT_NO_INSTRUMENT_FUNCTION 253 %token T_AT_OPTIMIZE 254 %token T_AT_OPTNONE 255 %token T_AT_PACKED 256 %token T_AT_PCS 257 %token T_AT_PURE 258 %token T_AT_REGPARM 259 %token T_AT_RETURNS_NONNULL 260 %token T_AT_RETURNS_TWICE 261 %token T_AT_SECTION 262 %token T_AT_SENTINEL 263 %token T_AT_STRING 264 %token T_AT_TARGET 265 %token T_AT_TLS_MODEL 266 %token T_AT_TUNION 267 %token T_AT_UNUSED 268 %token T_AT_USED 269 %token T_AT_VISIBILITY 270 %token T_AT_WARN_UNUSED_RESULT 271 %token T_AT_WEAK 272 273 %left T_THEN 274 %left T_ELSE 275 %right T_QUEST T_COLON 276 %left T_LOGOR 277 %left T_LOGAND 278 %left T_BITOR 279 %left T_BITXOR 280 %left T_AMPER 281 %left T_EQUALITY 282 %left T_RELATIONAL 283 %left T_SHIFT 284 %left T_ADDITIVE 285 %left T_ASTERISK T_MULTIPLICATIVE 286 287 %token <y_name> T_NAME 288 %token <y_name> T_TYPENAME 289 %token <y_val> T_CON 290 %token <y_string> T_STRING 291 292 %type <y_sym> identifier_sym 293 %type <y_name> identifier 294 %type <y_string> string 295 296 %type <y_tnode> primary_expression 297 %type <y_tnode> generic_selection 298 %type <y_generic> generic_assoc_list 299 %type <y_generic> generic_association 300 %type <y_tnode> postfix_expression 301 %type <y_tnode> gcc_statement_expr_list 302 %type <y_tnode> gcc_statement_expr_item 303 %type <y_op> point_or_arrow 304 %type <y_tnode> argument_expression_list 305 %type <y_tnode> unary_expression 306 %type <y_tnode> cast_expression 307 %type <y_tnode> conditional_expression 308 %type <y_tnode> assignment_expression 309 %type <y_tnode> expression_opt 310 %type <y_tnode> expression 311 %type <y_tnode> constant_expr 312 313 %type <y_type> begin_type_typespec 314 %type <y_type> type_specifier 315 %type <y_type> notype_type_specifier 316 %type <y_type> struct_or_union_specifier 317 %type <y_tspec> struct_or_union 318 %type <y_sym> braced_struct_declaration_list 319 %type <y_sym> struct_declaration_list_with_rbrace 320 %type <y_sym> struct_declaration_list 321 %type <y_sym> struct_declaration 322 %type <y_sym> notype_struct_declarators 323 %type <y_sym> type_struct_declarators 324 %type <y_sym> notype_struct_declarator 325 %type <y_sym> type_struct_declarator 326 %type <y_type> enum_specifier 327 %type <y_sym> enum_declaration 328 %type <y_sym> enums_with_opt_comma 329 %type <y_sym> enumerator_list 330 %type <y_sym> enumerator 331 %type <y_qual_ptr> type_qualifier 332 %type <y_qual_ptr> pointer 333 %type <y_qual_ptr> asterisk 334 %type <y_qual_ptr> type_qualifier_list_opt 335 %type <y_qual_ptr> type_qualifier_list 336 %type <y_sym> notype_declarator 337 %type <y_sym> type_declarator 338 %type <y_sym> notype_direct_declarator 339 %type <y_sym> type_direct_declarator 340 %type <y_sym> type_param_declarator 341 %type <y_sym> notype_param_declarator 342 %type <y_sym> direct_param_declarator 343 %type <y_sym> direct_notype_param_declarator 344 %type <y_sym> param_list 345 %type <y_array_size> array_size_opt 346 %type <y_tnode> array_size 347 %type <y_sym> identifier_list 348 %type <y_type> type_name 349 %type <y_sym> abstract_declaration 350 %type <y_sym> abstract_declarator 351 %type <y_sym> direct_abstract_declarator 352 %type <y_sym> abstract_decl_param_list 353 %type <y_sym> vararg_parameter_type_list 354 %type <y_sym> parameter_type_list 355 %type <y_sym> parameter_declaration 356 %type <y_range> range 357 %type <y_name> asm_or_symbolrename_opt 358 359 %type <y_seen_statement> block_item_list 360 %type <y_seen_statement> block_item 361 %type <y_tnode> do_while_expr 362 %type <y_sym> func_declarator 363 %type <y_in_system_header> sys 364 365 %{ 366 #if defined(YYDEBUG) && defined(YYBISON) 367 static inline void cgram_print(FILE *, int, YYSTYPE); 368 #endif 369 %} 370 371 %% 372 373 program: 374 /* empty */ { 375 if (sflag) { 376 /* empty translation unit */ 377 error(272); 378 } else if (!tflag) { 379 /* empty translation unit */ 380 warning(272); 381 } 382 } 383 | translation_unit 384 ; 385 386 identifier_sym: /* helper for struct/union/enum */ 387 identifier { 388 $$ = getsym($1); 389 } 390 ; 391 392 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 393 identifier: 394 T_NAME { 395 debug_step("cgram: name '%s'", $1->sb_name); 396 $$ = $1; 397 } 398 | T_TYPENAME { 399 debug_step("cgram: typename '%s'", $1->sb_name); 400 $$ = $1; 401 } 402 ; 403 404 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 405 string: 406 T_STRING 407 | string T_STRING { 408 if (tflag) { 409 /* concatenated strings are illegal in traditional C */ 410 warning(219); 411 } 412 $$ = cat_strings($1, $2); 413 } 414 ; 415 416 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 417 primary_expression: 418 T_NAME { 419 bool sys_name, sys_next; 420 sys_name = in_system_header; 421 if (yychar < 0) 422 yychar = yylex(); 423 sys_next = in_system_header; 424 in_system_header = sys_name; 425 $$ = build_name(getsym($1), yychar == T_LPAREN); 426 in_system_header = sys_next; 427 } 428 | T_CON { 429 $$ = build_constant(gettyp($1->v_tspec), $1); 430 } 431 | string { 432 $$ = build_string($1); 433 } 434 | T_LPAREN expression T_RPAREN { 435 if ($2 != NULL) 436 $2->tn_parenthesized = true; 437 $$ = $2; 438 } 439 | generic_selection 440 /* GCC primary-expression, see c_parser_postfix_expression */ 441 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 442 symtyp = FMEMBER; 443 $$ = build_offsetof($3, getsym($5)); 444 } 445 ; 446 447 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 448 generic_selection: 449 T_GENERIC T_LPAREN assignment_expression T_COMMA 450 generic_assoc_list T_RPAREN { 451 /* generic selection requires C11 or later */ 452 c11ism(345); 453 $$ = build_generic_selection($3, $5); 454 } 455 ; 456 457 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 458 generic_assoc_list: 459 generic_association 460 | generic_assoc_list T_COMMA generic_association { 461 $3->ga_prev = $1; 462 $$ = $3; 463 } 464 ; 465 466 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 467 generic_association: 468 type_name T_COLON assignment_expression { 469 $$ = block_zero_alloc(sizeof(*$$)); 470 $$->ga_arg = $1; 471 $$->ga_result = $3; 472 } 473 | T_DEFAULT T_COLON assignment_expression { 474 $$ = block_zero_alloc(sizeof(*$$)); 475 $$->ga_arg = NULL; 476 $$->ga_result = $3; 477 } 478 ; 479 480 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 481 postfix_expression: 482 primary_expression 483 | postfix_expression T_LBRACK sys expression T_RBRACK { 484 $$ = build_unary(INDIR, $3, build_binary($1, PLUS, $3, $4)); 485 } 486 | postfix_expression T_LPAREN sys T_RPAREN { 487 $$ = build_function_call($1, $3, NULL); 488 } 489 | postfix_expression T_LPAREN sys argument_expression_list T_RPAREN { 490 $$ = build_function_call($1, $3, $4); 491 } 492 | postfix_expression point_or_arrow sys T_NAME { 493 $$ = build_member_access($1, $2, $3, $4); 494 } 495 | postfix_expression T_INCDEC sys { 496 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $3, $1); 497 } 498 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 499 sym_t *tmp = mktempsym($2); 500 begin_initialization(tmp); 501 cgram_declare(tmp, true, NULL); 502 } init_lbrace initializer_list comma_opt init_rbrace { 503 if (!Sflag) 504 /* compound literals are a C99/GCC extension */ 505 gnuism(319); 506 $$ = build_name(*current_initsym(), false); 507 end_initialization(); 508 } 509 | T_LPAREN compound_statement_lbrace { 510 begin_statement_expr(); 511 } gcc_statement_expr_list { 512 do_statement_expr($4); 513 } compound_statement_rbrace T_RPAREN { 514 $$ = end_statement_expr(); 515 } 516 ; 517 518 comma_opt: /* helper for 'postfix_expression' */ 519 /* empty */ 520 | T_COMMA 521 ; 522 523 /* 524 * The inner part of a GCC statement-expression of the form ({ ... }). 525 * 526 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 527 */ 528 gcc_statement_expr_list: 529 gcc_statement_expr_item 530 | gcc_statement_expr_list gcc_statement_expr_item { 531 $$ = $2; 532 } 533 ; 534 535 gcc_statement_expr_item: 536 declaration_or_error { 537 clear_warning_flags(); 538 $$ = NULL; 539 } 540 | non_expr_statement { 541 $$ = expr_alloc_tnode(); 542 $$->tn_type = gettyp(VOID); 543 } 544 | expression T_SEMI { 545 if ($1 == NULL) { /* in case of syntax errors */ 546 $$ = expr_alloc_tnode(); 547 $$->tn_type = gettyp(VOID); 548 } else { 549 /* XXX: do that only on the last name */ 550 if ($1->tn_op == NAME) 551 $1->tn_sym->s_used = true; 552 expr($1, false, false, false, false); 553 seen_fallthrough = false; 554 $$ = $1; 555 } 556 } 557 ; 558 559 point_or_arrow: /* helper for 'postfix_expression' */ 560 T_POINT { 561 symtyp = FMEMBER; 562 $$ = POINT; 563 } 564 | T_ARROW { 565 symtyp = FMEMBER; 566 $$ = ARROW; 567 } 568 ; 569 570 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 571 argument_expression_list: 572 assignment_expression { 573 $$ = build_function_argument(NULL, $1); 574 } 575 | argument_expression_list T_COMMA assignment_expression { 576 $$ = build_function_argument($1, $3); 577 } 578 ; 579 580 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 581 unary_expression: 582 postfix_expression 583 | T_INCDEC sys unary_expression { 584 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2, $3); 585 } 586 | T_AMPER sys cast_expression { 587 $$ = build_unary(ADDR, $2, $3); 588 } 589 | T_ASTERISK sys cast_expression { 590 $$ = build_unary(INDIR, $2, $3); 591 } 592 | T_ADDITIVE sys cast_expression { 593 if (tflag && $1 == PLUS) { 594 /* unary + is illegal in traditional C */ 595 warning(100); 596 } 597 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2, $3); 598 } 599 | T_COMPLEMENT sys cast_expression { 600 $$ = build_unary(COMPL, $2, $3); 601 } 602 | T_LOGNOT sys cast_expression { 603 $$ = build_unary(NOT, $2, $3); 604 } 605 | T_REAL sys cast_expression { /* GCC c_parser_unary_expression */ 606 $$ = build_unary(REAL, $2, $3); 607 } 608 | T_IMAG sys cast_expression { /* GCC c_parser_unary_expression */ 609 $$ = build_unary(IMAG, $2, $3); 610 } 611 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 612 $$ = $2; 613 } 614 | T_SIZEOF unary_expression { 615 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 616 if ($$ != NULL) 617 check_expr_misc($2, 618 false, false, false, false, false, true); 619 } 620 | T_SIZEOF T_LPAREN type_name T_RPAREN { 621 $$ = build_sizeof($3); 622 } 623 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 624 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 625 /* TODO: c11ism */ 626 $$ = build_alignof($3); 627 } 628 ; 629 630 /* The rule 'unary_operator' is inlined into unary_expression. */ 631 632 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 633 cast_expression: 634 unary_expression 635 | T_LPAREN type_name T_RPAREN cast_expression { 636 $$ = cast($4, $2); 637 } 638 ; 639 640 expression_opt: 641 /* empty */ { 642 $$ = NULL; 643 } 644 | expression 645 ; 646 647 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 648 /* 'conditional_expression' also implements 'additive_expression'. */ 649 /* 'conditional_expression' also implements 'shift_expression'. */ 650 /* 'conditional_expression' also implements 'relational_expression'. */ 651 /* 'conditional_expression' also implements 'equality_expression'. */ 652 /* 'conditional_expression' also implements 'AND_expression'. */ 653 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 654 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 655 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 656 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 657 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 658 conditional_expression: 659 cast_expression 660 | conditional_expression T_ASTERISK sys conditional_expression { 661 $$ = build_binary($1, MULT, $3, $4); 662 } 663 | conditional_expression T_MULTIPLICATIVE sys conditional_expression { 664 $$ = build_binary($1, $2, $3, $4); 665 } 666 | conditional_expression T_ADDITIVE sys conditional_expression { 667 $$ = build_binary($1, $2, $3, $4); 668 } 669 | conditional_expression T_SHIFT sys conditional_expression { 670 $$ = build_binary($1, $2, $3, $4); 671 } 672 | conditional_expression T_RELATIONAL sys conditional_expression { 673 $$ = build_binary($1, $2, $3, $4); 674 } 675 | conditional_expression T_EQUALITY sys conditional_expression { 676 $$ = build_binary($1, $2, $3, $4); 677 } 678 | conditional_expression T_AMPER sys conditional_expression { 679 $$ = build_binary($1, BITAND, $3, $4); 680 } 681 | conditional_expression T_BITXOR sys conditional_expression { 682 $$ = build_binary($1, BITXOR, $3, $4); 683 } 684 | conditional_expression T_BITOR sys conditional_expression { 685 $$ = build_binary($1, BITOR, $3, $4); 686 } 687 | conditional_expression T_LOGAND sys conditional_expression { 688 $$ = build_binary($1, LOGAND, $3, $4); 689 } 690 | conditional_expression T_LOGOR sys conditional_expression { 691 $$ = build_binary($1, LOGOR, $3, $4); 692 } 693 | conditional_expression T_QUEST sys 694 expression T_COLON sys conditional_expression { 695 $$ = build_binary($1, QUEST, $3, 696 build_binary($4, COLON, $6, $7)); 697 } 698 ; 699 700 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 701 assignment_expression: 702 conditional_expression 703 | unary_expression T_ASSIGN sys assignment_expression { 704 $$ = build_binary($1, ASSIGN, $3, $4); 705 } 706 | unary_expression T_OPASSIGN sys assignment_expression { 707 $$ = build_binary($1, $2, $3, $4); 708 } 709 ; 710 711 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 712 expression: 713 assignment_expression 714 | expression T_COMMA sys assignment_expression { 715 $$ = build_binary($1, COMMA, $3, $4); 716 } 717 ; 718 719 constant_expr_list_opt: /* helper for gcc_attribute */ 720 /* empty */ 721 | constant_expr_list 722 ; 723 724 constant_expr_list: /* helper for gcc_attribute */ 725 constant_expr 726 | constant_expr_list T_COMMA constant_expr 727 ; 728 729 constant_expr: /* C99 6.6 */ 730 conditional_expression 731 ; 732 733 declaration_or_error: 734 declaration 735 | error T_SEMI 736 ; 737 738 declaration: /* C99 6.7 */ 739 begin_type_declmods end_type T_SEMI { 740 if (dcs->d_scl == TYPEDEF) { 741 /* typedef declares no type name */ 742 warning(72); 743 } else { 744 /* empty declaration */ 745 warning(2); 746 } 747 } 748 | begin_type_declmods end_type notype_init_declarators T_SEMI 749 /* ^^ There is no check for the missing type-specifier. */ 750 | begin_type_declaration_specifiers end_type T_SEMI { 751 if (dcs->d_scl == TYPEDEF) { 752 /* typedef declares no type name */ 753 warning(72); 754 } else if (!dcs->d_nonempty_decl) { 755 /* empty declaration */ 756 warning(2); 757 } 758 } 759 | begin_type_declaration_specifiers end_type 760 type_init_declarators T_SEMI 761 | static_assert_declaration 762 ; 763 764 begin_type_declaration_specifiers: /* see C99 6.7 */ 765 begin_type_typespec { 766 add_type($1); 767 } 768 | begin_type_declmods type_specifier { 769 add_type($2); 770 } 771 | type_attribute begin_type_declaration_specifiers 772 | begin_type_declaration_specifiers declmod 773 | begin_type_declaration_specifiers notype_type_specifier { 774 add_type($2); 775 } 776 ; 777 778 begin_type_declmods: /* see C99 6.7 */ 779 begin_type T_QUAL { 780 add_qualifier($2); 781 } 782 | begin_type T_SCLASS { 783 add_storage_class($2); 784 } 785 | begin_type_declmods declmod 786 ; 787 788 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 789 begin_type_specifier_qualifier_list_postfix 790 | type_attribute_list begin_type_specifier_qualifier_list_postfix 791 ; 792 793 begin_type_specifier_qualifier_list_postfix: 794 begin_type_typespec { 795 add_type($1); 796 } 797 | begin_type_qualifier_list type_specifier { 798 add_type($2); 799 } 800 | begin_type_specifier_qualifier_list_postfix T_QUAL { 801 add_qualifier($2); 802 } 803 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 804 add_type($2); 805 } 806 | begin_type_specifier_qualifier_list_postfix type_attribute 807 ; 808 809 begin_type_typespec: 810 begin_type notype_type_specifier { 811 $$ = $2; 812 } 813 | T_TYPENAME begin_type { 814 $$ = getsym($1)->s_type; 815 } 816 ; 817 818 begin_type_qualifier_list: 819 begin_type T_QUAL { 820 add_qualifier($2); 821 } 822 | begin_type_qualifier_list T_QUAL { 823 add_qualifier($2); 824 } 825 ; 826 827 declmod: 828 T_QUAL { 829 add_qualifier($1); 830 } 831 | T_SCLASS { 832 add_storage_class($1); 833 } 834 | type_attribute_list 835 ; 836 837 type_attribute_list: 838 type_attribute 839 | type_attribute_list type_attribute 840 ; 841 842 type_attribute_opt: 843 /* empty */ 844 | type_attribute 845 ; 846 847 type_attribute: /* See C11 6.7 declaration-specifiers */ 848 gcc_attribute 849 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 850 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 851 | T_PACKED { 852 addpacked(); 853 } 854 | T_NORETURN 855 ; 856 857 begin_type: 858 /* empty */ { 859 begin_type(); 860 } 861 ; 862 863 end_type: 864 /* empty */ { 865 end_type(); 866 } 867 ; 868 869 type_specifier: /* C99 6.7.2 */ 870 notype_type_specifier 871 | T_TYPENAME { 872 $$ = getsym($1)->s_type; 873 } 874 ; 875 876 notype_type_specifier: /* see C99 6.7.2 */ 877 T_TYPE { 878 $$ = gettyp($1); 879 } 880 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 881 $$ = $3->tn_type; 882 } 883 | struct_or_union_specifier { 884 end_declaration_level(); 885 $$ = $1; 886 } 887 | enum_specifier { 888 end_declaration_level(); 889 $$ = $1; 890 } 891 ; 892 893 struct_or_union_specifier: /* C99 6.7.2.1 */ 894 struct_or_union identifier_sym { 895 /* 896 * STDC requires that "struct a;" always introduces 897 * a new tag if "a" is not declared at current level 898 * 899 * yychar is valid because otherwise the parser would not 900 * have been able to decide if it must shift or reduce 901 */ 902 $$ = mktag($2, $1, false, yychar == T_SEMI); 903 } 904 | struct_or_union identifier_sym { 905 dcs->d_tagtyp = mktag($2, $1, true, false); 906 } braced_struct_declaration_list { 907 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 908 } 909 | struct_or_union { 910 dcs->d_tagtyp = mktag(NULL, $1, true, false); 911 } braced_struct_declaration_list { 912 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 913 } 914 | struct_or_union error { 915 symtyp = FVFT; 916 $$ = gettyp(INT); 917 } 918 ; 919 920 struct_or_union: /* C99 6.7.2.1 */ 921 T_STRUCT_OR_UNION { 922 symtyp = FTAG; 923 begin_declaration_level($1 == STRUCT ? MOS : MOU); 924 dcs->d_offset = 0; 925 dcs->d_sou_align_in_bits = CHAR_SIZE; 926 $$ = $1; 927 } 928 | struct_or_union type_attribute 929 ; 930 931 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 932 struct_declaration_lbrace struct_declaration_list_with_rbrace { 933 $$ = $2; 934 } 935 ; 936 937 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 938 T_LBRACE { 939 symtyp = FVFT; 940 } 941 ; 942 943 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 944 struct_declaration_list T_RBRACE 945 | T_RBRACE { 946 /* XXX: This is not allowed by any C standard. */ 947 $$ = NULL; 948 } 949 ; 950 951 struct_declaration_list: /* C99 6.7.2.1 */ 952 struct_declaration 953 | struct_declaration_list struct_declaration { 954 $$ = lnklst($1, $2); 955 } 956 ; 957 958 struct_declaration: /* C99 6.7.2.1 */ 959 begin_type_qualifier_list end_type { 960 /* ^^ There is no check for the missing type-specifier. */ 961 /* too late, i know, but getsym() compensates it */ 962 symtyp = FMEMBER; 963 } notype_struct_declarators type_attribute_opt T_SEMI { 964 symtyp = FVFT; 965 $$ = $4; 966 } 967 | begin_type_specifier_qualifier_list end_type { 968 symtyp = FMEMBER; 969 } type_struct_declarators type_attribute_opt T_SEMI { 970 symtyp = FVFT; 971 $$ = $4; 972 } 973 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 974 /* syntax error '%s' */ 975 error(249, "member without type"); 976 $$ = NULL; 977 } 978 | begin_type_specifier_qualifier_list end_type type_attribute_opt 979 T_SEMI { 980 symtyp = FVFT; 981 if (!Sflag) 982 /* anonymous struct/union members is a C11 feature */ 983 warning(49); 984 if (is_struct_or_union(dcs->d_type->t_tspec)) { 985 $$ = dcs->d_type->t_str->sou_first_member; 986 /* add all the members of the anonymous struct/union */ 987 anonymize($$); 988 } else { 989 /* syntax error '%s' */ 990 error(249, "unnamed member"); 991 $$ = NULL; 992 } 993 } 994 | static_assert_declaration { 995 $$ = NULL; 996 } 997 | error T_SEMI { 998 symtyp = FVFT; 999 $$ = NULL; 1000 } 1001 ; 1002 1003 notype_struct_declarators: 1004 notype_struct_declarator { 1005 $$ = declarator_1_struct_union($1); 1006 } 1007 | notype_struct_declarators { 1008 symtyp = FMEMBER; 1009 } T_COMMA type_struct_declarator { 1010 $$ = lnklst($1, declarator_1_struct_union($4)); 1011 } 1012 ; 1013 1014 type_struct_declarators: 1015 type_struct_declarator { 1016 $$ = declarator_1_struct_union($1); 1017 } 1018 | type_struct_declarators { 1019 symtyp = FMEMBER; 1020 } T_COMMA type_struct_declarator { 1021 $$ = lnklst($1, declarator_1_struct_union($4)); 1022 } 1023 ; 1024 1025 notype_struct_declarator: 1026 notype_declarator 1027 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1028 $$ = bitfield($1, to_int_constant($3, true)); 1029 } 1030 | { 1031 symtyp = FVFT; 1032 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1033 $$ = bitfield(NULL, to_int_constant($3, true)); 1034 } 1035 ; 1036 1037 type_struct_declarator: 1038 type_declarator 1039 | type_declarator T_COLON constant_expr { 1040 $$ = bitfield($1, to_int_constant($3, true)); 1041 } 1042 | { 1043 symtyp = FVFT; 1044 } T_COLON constant_expr { 1045 $$ = bitfield(NULL, to_int_constant($3, true)); 1046 } 1047 ; 1048 1049 enum_specifier: /* C99 6.7.2.2 */ 1050 enum gcc_attribute_list_opt identifier_sym { 1051 $$ = mktag($3, ENUM, false, false); 1052 } 1053 | enum gcc_attribute_list_opt identifier_sym { 1054 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1055 } enum_declaration /*gcc_attribute_list_opt*/ { 1056 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1057 } 1058 | enum gcc_attribute_list_opt { 1059 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1060 } enum_declaration /*gcc_attribute_list_opt*/ { 1061 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1062 } 1063 | enum error { 1064 symtyp = FVFT; 1065 $$ = gettyp(INT); 1066 } 1067 ; 1068 1069 enum: /* helper for C99 6.7.2.2 */ 1070 T_ENUM { 1071 symtyp = FTAG; 1072 begin_declaration_level(CTCONST); 1073 } 1074 ; 1075 1076 enum_declaration: /* helper for C99 6.7.2.2 */ 1077 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1078 $$ = $2; 1079 } 1080 ; 1081 1082 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1083 T_LBRACE { 1084 symtyp = FVFT; 1085 enumval = 0; 1086 } 1087 ; 1088 1089 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1090 enumerator_list 1091 | enumerator_list T_COMMA { 1092 if (sflag) { 1093 /* trailing ',' prohibited in enum declaration */ 1094 error(54); 1095 } else { 1096 /* trailing ',' prohibited in enum declaration */ 1097 c99ism(54); 1098 } 1099 $$ = $1; 1100 } 1101 ; 1102 1103 enumerator_list: /* C99 6.7.2.2 */ 1104 enumerator 1105 | enumerator_list T_COMMA enumerator { 1106 $$ = lnklst($1, $3); 1107 } 1108 | error { 1109 $$ = NULL; 1110 } 1111 ; 1112 1113 enumerator: /* C99 6.7.2.2 */ 1114 identifier_sym gcc_attribute_list_opt { 1115 $$ = enumeration_constant($1, enumval, true); 1116 } 1117 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1118 $$ = enumeration_constant($1, to_int_constant($4, true), 1119 false); 1120 } 1121 ; 1122 1123 type_qualifier: /* C99 6.7.3 */ 1124 T_QUAL { 1125 $$ = xcalloc(1, sizeof(*$$)); 1126 if ($1 == CONST) 1127 $$->p_const = true; 1128 if ($1 == VOLATILE) 1129 $$->p_volatile = true; 1130 } 1131 ; 1132 1133 pointer: /* C99 6.7.5 */ 1134 asterisk type_qualifier_list_opt { 1135 $$ = merge_qualified_pointer($1, $2); 1136 } 1137 | asterisk type_qualifier_list_opt pointer { 1138 $$ = merge_qualified_pointer($1, $2); 1139 $$ = merge_qualified_pointer($$, $3); 1140 } 1141 ; 1142 1143 asterisk: /* helper for 'pointer' */ 1144 T_ASTERISK { 1145 $$ = xcalloc(1, sizeof(*$$)); 1146 $$->p_pointer = true; 1147 } 1148 ; 1149 1150 type_qualifier_list_opt: /* see C99 6.7.5 */ 1151 /* empty */ { 1152 $$ = NULL; 1153 } 1154 | type_qualifier_list 1155 ; 1156 1157 type_qualifier_list: /* C99 6.7.5 */ 1158 type_qualifier 1159 | type_qualifier_list type_qualifier { 1160 $$ = merge_qualified_pointer($1, $2); 1161 } 1162 ; 1163 1164 /* 1165 * For an explanation of 'notype' in the following rules, see 1166 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1167 */ 1168 1169 notype_init_declarators: 1170 notype_init_declarator 1171 | notype_init_declarators T_COMMA type_init_declarator 1172 ; 1173 1174 type_init_declarators: 1175 type_init_declarator 1176 | type_init_declarators T_COMMA type_init_declarator 1177 ; 1178 1179 notype_init_declarator: 1180 notype_declarator asm_or_symbolrename_opt { 1181 cgram_declare($1, false, $2); 1182 check_size($1); 1183 } 1184 | notype_declarator asm_or_symbolrename_opt { 1185 begin_initialization($1); 1186 cgram_declare($1, true, $2); 1187 } T_ASSIGN initializer { 1188 check_size($1); 1189 end_initialization(); 1190 } 1191 ; 1192 1193 type_init_declarator: 1194 type_declarator asm_or_symbolrename_opt { 1195 cgram_declare($1, false, $2); 1196 check_size($1); 1197 } 1198 | type_declarator asm_or_symbolrename_opt { 1199 begin_initialization($1); 1200 cgram_declare($1, true, $2); 1201 } T_ASSIGN initializer { 1202 check_size($1); 1203 end_initialization(); 1204 } 1205 ; 1206 1207 notype_declarator: 1208 notype_direct_declarator 1209 | pointer notype_direct_declarator { 1210 $$ = add_pointer($2, $1); 1211 } 1212 ; 1213 1214 type_declarator: 1215 type_direct_declarator 1216 | pointer type_direct_declarator { 1217 $$ = add_pointer($2, $1); 1218 } 1219 ; 1220 1221 notype_direct_declarator: 1222 T_NAME { 1223 $$ = declarator_name(getsym($1)); 1224 } 1225 | T_LPAREN type_declarator T_RPAREN { 1226 $$ = $2; 1227 } 1228 | type_attribute notype_direct_declarator { 1229 $$ = $2; 1230 } 1231 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1232 $$ = add_array($1, $3.has_dim, $3.dim); 1233 } 1234 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1235 $$ = add_function(symbolrename($1, $3), $2); 1236 end_declaration_level(); 1237 block_level--; 1238 } 1239 | notype_direct_declarator type_attribute 1240 ; 1241 1242 type_direct_declarator: 1243 identifier { 1244 $$ = declarator_name(getsym($1)); 1245 } 1246 | T_LPAREN type_declarator T_RPAREN { 1247 $$ = $2; 1248 } 1249 | type_attribute type_direct_declarator { 1250 $$ = $2; 1251 } 1252 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1253 $$ = add_array($1, $3.has_dim, $3.dim); 1254 } 1255 | type_direct_declarator param_list asm_or_symbolrename_opt { 1256 $$ = add_function(symbolrename($1, $3), $2); 1257 end_declaration_level(); 1258 block_level--; 1259 } 1260 | type_direct_declarator type_attribute 1261 ; 1262 1263 /* 1264 * The two distinct rules type_param_declarator and notype_param_declarator 1265 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1266 * always treated as a typename, not an argument name. For example, after 1267 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1268 * "f(int (double));", not "f(int a);". 1269 */ 1270 type_param_declarator: 1271 direct_param_declarator 1272 | pointer direct_param_declarator { 1273 $$ = add_pointer($2, $1); 1274 } 1275 ; 1276 1277 notype_param_declarator: 1278 direct_notype_param_declarator 1279 | pointer direct_notype_param_declarator { 1280 $$ = add_pointer($2, $1); 1281 } 1282 ; 1283 1284 direct_param_declarator: 1285 identifier type_attribute_list { 1286 $$ = declarator_name(getsym($1)); 1287 } 1288 | identifier { 1289 $$ = declarator_name(getsym($1)); 1290 } 1291 | T_LPAREN notype_param_declarator T_RPAREN { 1292 $$ = $2; 1293 } 1294 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1295 gcc_attribute_list_opt { 1296 $$ = add_array($1, $3.has_dim, $3.dim); 1297 } 1298 | direct_param_declarator param_list asm_or_symbolrename_opt { 1299 $$ = add_function(symbolrename($1, $3), $2); 1300 end_declaration_level(); 1301 block_level--; 1302 } 1303 ; 1304 1305 direct_notype_param_declarator: 1306 identifier { 1307 $$ = declarator_name(getsym($1)); 1308 } 1309 | T_LPAREN notype_param_declarator T_RPAREN { 1310 $$ = $2; 1311 } 1312 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1313 $$ = add_array($1, $3.has_dim, $3.dim); 1314 } 1315 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1316 $$ = add_function(symbolrename($1, $3), $2); 1317 end_declaration_level(); 1318 block_level--; 1319 } 1320 ; 1321 1322 param_list: 1323 id_list_lparen identifier_list T_RPAREN { 1324 $$ = $2; 1325 } 1326 | abstract_decl_param_list 1327 ; 1328 1329 id_list_lparen: 1330 T_LPAREN { 1331 block_level++; 1332 begin_declaration_level(PROTO_ARG); 1333 } 1334 ; 1335 1336 array_size_opt: 1337 /* empty */ { 1338 $$.has_dim = false; 1339 $$.dim = 0; 1340 } 1341 | T_ASTERISK { 1342 /* since C99; variable length array of unspecified size */ 1343 $$.has_dim = false; /* TODO: maybe change to true */ 1344 $$.dim = 0; /* just as a placeholder */ 1345 } 1346 | array_size { 1347 $$.has_dim = true; 1348 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1349 } 1350 ; 1351 1352 array_size: 1353 type_qualifier_list_opt T_SCLASS constant_expr { 1354 /* C11 6.7.6.3p7 */ 1355 if ($2 != STATIC) 1356 yyerror("Bad attribute"); 1357 /* static array size is a C11 extension */ 1358 c11ism(343); 1359 $$ = $3; 1360 } 1361 | T_QUAL { 1362 /* C11 6.7.6.2 */ 1363 if ($1 != RESTRICT) 1364 yyerror("Bad attribute"); 1365 $$ = NULL; 1366 } 1367 | constant_expr 1368 ; 1369 1370 identifier_list: /* C99 6.7.5 */ 1371 T_NAME { 1372 $$ = old_style_function_name(getsym($1)); 1373 } 1374 | identifier_list T_COMMA T_NAME { 1375 $$ = lnklst($1, old_style_function_name(getsym($3))); 1376 } 1377 | identifier_list error 1378 ; 1379 1380 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1381 type_name: /* C99 6.7.6 */ 1382 { 1383 begin_declaration_level(ABSTRACT); 1384 } abstract_declaration { 1385 end_declaration_level(); 1386 $$ = $2->s_type; 1387 } 1388 ; 1389 1390 abstract_declaration: /* specific to lint */ 1391 begin_type_qualifier_list end_type { 1392 $$ = declare_1_abstract(abstract_name()); 1393 } 1394 | begin_type_specifier_qualifier_list end_type { 1395 $$ = declare_1_abstract(abstract_name()); 1396 } 1397 | begin_type_qualifier_list end_type abstract_declarator { 1398 $$ = declare_1_abstract($3); 1399 } 1400 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1401 $$ = declare_1_abstract($3); 1402 } 1403 ; 1404 1405 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1406 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1407 abstract_declarator: 1408 pointer { 1409 $$ = add_pointer(abstract_name(), $1); 1410 } 1411 | direct_abstract_declarator 1412 | pointer direct_abstract_declarator { 1413 $$ = add_pointer($2, $1); 1414 } 1415 ; 1416 1417 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1418 direct_abstract_declarator: 1419 /* TODO: sort rules according to C99 */ 1420 T_LPAREN abstract_declarator T_RPAREN { 1421 $$ = $2; 1422 } 1423 | T_LBRACK array_size_opt T_RBRACK { 1424 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1425 } 1426 | type_attribute direct_abstract_declarator { 1427 $$ = $2; 1428 } 1429 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1430 $$ = add_array($1, $3.has_dim, $3.dim); 1431 } 1432 | abstract_decl_param_list asm_or_symbolrename_opt { 1433 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1434 end_declaration_level(); 1435 block_level--; 1436 } 1437 | direct_abstract_declarator abstract_decl_param_list 1438 asm_or_symbolrename_opt { 1439 $$ = add_function(symbolrename($1, $3), $2); 1440 end_declaration_level(); 1441 block_level--; 1442 } 1443 | direct_abstract_declarator type_attribute_list 1444 ; 1445 1446 abstract_decl_param_list: /* specific to lint */ 1447 abstract_decl_lparen T_RPAREN type_attribute_opt { 1448 $$ = NULL; 1449 } 1450 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1451 type_attribute_opt { 1452 dcs->d_proto = true; 1453 $$ = $2; 1454 } 1455 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1456 $$ = NULL; 1457 } 1458 ; 1459 1460 abstract_decl_lparen: /* specific to lint */ 1461 T_LPAREN { 1462 block_level++; 1463 begin_declaration_level(PROTO_ARG); 1464 } 1465 ; 1466 1467 vararg_parameter_type_list: /* specific to lint */ 1468 parameter_type_list 1469 | parameter_type_list T_COMMA T_ELLIPSIS { 1470 dcs->d_vararg = true; 1471 $$ = $1; 1472 } 1473 | T_ELLIPSIS { 1474 if (sflag) { 1475 /* ANSI C requires formal parameter before '...' */ 1476 error(84); 1477 } else if (!tflag) { 1478 /* ANSI C requires formal parameter before '...' */ 1479 warning(84); 1480 } 1481 dcs->d_vararg = true; 1482 $$ = NULL; 1483 } 1484 ; 1485 1486 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1487 parameter_type_list: 1488 parameter_declaration 1489 | parameter_type_list T_COMMA parameter_declaration { 1490 $$ = lnklst($1, $3); 1491 } 1492 ; 1493 1494 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1495 parameter_declaration: 1496 begin_type_declmods end_type { 1497 /* ^^ There is no check for the missing type-specifier. */ 1498 $$ = declare_argument(abstract_name(), false); 1499 } 1500 | begin_type_declaration_specifiers end_type { 1501 $$ = declare_argument(abstract_name(), false); 1502 } 1503 | begin_type_declmods end_type notype_param_declarator { 1504 /* ^^ There is no check for the missing type-specifier. */ 1505 $$ = declare_argument($3, false); 1506 } 1507 /* 1508 * type_param_declarator is needed because of following conflict: 1509 * "typedef int a; f(int (a));" could be parsed as 1510 * "function with argument a of type int", or 1511 * "function with an abstract argument of type function". 1512 * This grammar realizes the second case. 1513 */ 1514 | begin_type_declaration_specifiers end_type type_param_declarator { 1515 $$ = declare_argument($3, false); 1516 } 1517 | begin_type_declmods end_type abstract_declarator { 1518 /* ^^ There is no check for the missing type-specifier. */ 1519 $$ = declare_argument($3, false); 1520 } 1521 | begin_type_declaration_specifiers end_type abstract_declarator { 1522 $$ = declare_argument($3, false); 1523 } 1524 ; 1525 1526 initializer: /* C99 6.7.8 "Initialization" */ 1527 assignment_expression { 1528 init_expr($1); 1529 } 1530 | init_lbrace init_rbrace { 1531 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1532 } 1533 | init_lbrace initializer_list comma_opt init_rbrace 1534 /* XXX: What is this error handling for? */ 1535 | error 1536 ; 1537 1538 initializer_list: /* C99 6.7.8 "Initialization" */ 1539 initializer_list_item 1540 | initializer_list T_COMMA initializer_list_item 1541 ; 1542 1543 initializer_list_item: /* helper */ 1544 designation initializer 1545 | initializer 1546 ; 1547 1548 designation: /* C99 6.7.8 "Initialization" */ 1549 begin_designation designator_list T_ASSIGN 1550 | identifier T_COLON { 1551 /* GCC style struct or union member name in initializer */ 1552 gnuism(315); 1553 begin_designation(); 1554 add_designator_member($1); 1555 } 1556 ; 1557 1558 begin_designation: /* lint-specific helper */ 1559 /* empty */ { 1560 begin_designation(); 1561 } 1562 ; 1563 1564 designator_list: /* C99 6.7.8 "Initialization" */ 1565 designator 1566 | designator_list designator 1567 ; 1568 1569 designator: /* C99 6.7.8 "Initialization" */ 1570 T_LBRACK range T_RBRACK { 1571 add_designator_subscript($2); 1572 if (!Sflag) 1573 /* array initializer with designators is a C99 ... */ 1574 warning(321); 1575 } 1576 | T_POINT identifier { 1577 if (!Sflag) 1578 /* struct or union member name in initializer is ... */ 1579 warning(313); 1580 add_designator_member($2); 1581 } 1582 ; 1583 1584 static_assert_declaration: 1585 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1586 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1587 ; 1588 1589 range: 1590 constant_expr { 1591 $$.lo = to_int_constant($1, true); 1592 $$.hi = $$.lo; 1593 } 1594 | constant_expr T_ELLIPSIS constant_expr { 1595 $$.lo = to_int_constant($1, true); 1596 $$.hi = to_int_constant($3, true); 1597 /* initialization with '[a...b]' is a GCC extension */ 1598 gnuism(340); 1599 } 1600 ; 1601 1602 init_lbrace: /* helper */ 1603 T_LBRACE { 1604 init_lbrace(); 1605 } 1606 ; 1607 1608 init_rbrace: /* helper */ 1609 T_RBRACE { 1610 init_rbrace(); 1611 } 1612 ; 1613 1614 asm_or_symbolrename_opt: /* GCC extensions */ 1615 /* empty */ { 1616 $$ = NULL; 1617 } 1618 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1619 freeyyv(&$3, T_STRING); 1620 $$ = NULL; 1621 } 1622 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1623 $$ = $3; 1624 } 1625 ; 1626 1627 statement: /* C99 6.8 */ 1628 expression_statement 1629 | non_expr_statement 1630 ; 1631 1632 non_expr_statement: /* helper for C99 6.8 */ 1633 type_attribute T_SEMI 1634 | labeled_statement 1635 | compound_statement 1636 | selection_statement 1637 | iteration_statement 1638 | jump_statement { 1639 seen_fallthrough = false; 1640 } 1641 | asm_statement 1642 ; 1643 1644 labeled_statement: /* C99 6.8.1 */ 1645 label type_attribute_opt statement 1646 ; 1647 1648 label: 1649 T_NAME T_COLON { 1650 symtyp = FLABEL; 1651 named_label(getsym($1)); 1652 } 1653 | T_CASE constant_expr T_COLON { 1654 case_label($2); 1655 seen_fallthrough = true; 1656 } 1657 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1658 /* XXX: We don't fill all cases */ 1659 case_label($2); 1660 seen_fallthrough = true; 1661 } 1662 | T_DEFAULT T_COLON { 1663 default_label(); 1664 seen_fallthrough = true; 1665 } 1666 ; 1667 1668 compound_statement: /* C99 6.8.2 */ 1669 compound_statement_lbrace compound_statement_rbrace 1670 | compound_statement_lbrace block_item_list compound_statement_rbrace 1671 ; 1672 1673 compound_statement_lbrace: 1674 T_LBRACE { 1675 block_level++; 1676 mem_block_level++; 1677 begin_declaration_level(AUTO); 1678 } 1679 ; 1680 1681 compound_statement_rbrace: 1682 T_RBRACE { 1683 end_declaration_level(); 1684 level_free_all(mem_block_level); 1685 mem_block_level--; 1686 block_level--; 1687 seen_fallthrough = false; 1688 } 1689 ; 1690 1691 block_item_list: /* C99 6.8.2 */ 1692 block_item 1693 | block_item_list block_item { 1694 if (!Sflag && $1 && !$2) 1695 /* declarations after statements is a C99 feature */ 1696 c99ism(327); 1697 $$ = $1 || $2; 1698 } 1699 ; 1700 1701 block_item: /* C99 6.8.2 */ 1702 declaration_or_error { 1703 $$ = false; 1704 restore_warning_flags(); 1705 } 1706 | statement { 1707 $$ = true; 1708 restore_warning_flags(); 1709 } 1710 ; 1711 1712 expression_statement: /* C99 6.8.3 */ 1713 expression T_SEMI { 1714 expr($1, false, false, false, false); 1715 seen_fallthrough = false; 1716 } 1717 | T_SEMI { 1718 check_statement_reachable(); 1719 seen_fallthrough = false; 1720 } 1721 ; 1722 1723 selection_statement: /* C99 6.8.4 */ 1724 if_without_else %prec T_THEN { 1725 save_warning_flags(); 1726 if2(); 1727 if3(false); 1728 } 1729 | if_without_else T_ELSE { 1730 save_warning_flags(); 1731 if2(); 1732 } statement { 1733 clear_warning_flags(); 1734 if3(true); 1735 } 1736 | if_without_else T_ELSE error { 1737 clear_warning_flags(); 1738 if3(false); 1739 } 1740 | switch_expr statement { 1741 clear_warning_flags(); 1742 switch2(); 1743 } 1744 | switch_expr error { 1745 clear_warning_flags(); 1746 switch2(); 1747 } 1748 ; 1749 1750 if_without_else: /* see C99 6.8.4 */ 1751 if_expr statement 1752 | if_expr error 1753 ; 1754 1755 if_expr: /* see C99 6.8.4 */ 1756 T_IF T_LPAREN expression T_RPAREN { 1757 if1($3); 1758 clear_warning_flags(); 1759 } 1760 ; 1761 1762 switch_expr: /* see C99 6.8.4 */ 1763 T_SWITCH T_LPAREN expression T_RPAREN { 1764 switch1($3); 1765 clear_warning_flags(); 1766 } 1767 ; 1768 1769 iteration_statement: /* C99 6.8.5 */ 1770 while_expr statement { 1771 clear_warning_flags(); 1772 while2(); 1773 } 1774 | while_expr error { 1775 clear_warning_flags(); 1776 while2(); 1777 } 1778 | do_statement do_while_expr { 1779 do2($2); 1780 seen_fallthrough = false; 1781 } 1782 | do error { 1783 clear_warning_flags(); 1784 do2(NULL); 1785 } 1786 | for_exprs statement { 1787 clear_warning_flags(); 1788 for2(); 1789 end_declaration_level(); 1790 block_level--; 1791 } 1792 | for_exprs error { 1793 clear_warning_flags(); 1794 for2(); 1795 end_declaration_level(); 1796 block_level--; 1797 } 1798 ; 1799 1800 while_expr: /* see C99 6.8.5 */ 1801 T_WHILE T_LPAREN expression T_RPAREN { 1802 while1($3); 1803 clear_warning_flags(); 1804 } 1805 ; 1806 1807 do_statement: /* see C99 6.8.5 */ 1808 do statement { 1809 clear_warning_flags(); 1810 } 1811 ; 1812 1813 do: /* see C99 6.8.5 */ 1814 T_DO { 1815 do1(); 1816 } 1817 ; 1818 1819 do_while_expr: /* see C99 6.8.5 */ 1820 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1821 $$ = $3; 1822 } 1823 ; 1824 1825 for_start: /* see C99 6.8.5 */ 1826 T_FOR T_LPAREN { 1827 begin_declaration_level(AUTO); 1828 block_level++; 1829 } 1830 ; 1831 1832 for_exprs: /* see C99 6.8.5 */ 1833 for_start 1834 begin_type_declaration_specifiers end_type 1835 notype_init_declarators T_SEMI 1836 expression_opt T_SEMI 1837 expression_opt T_RPAREN { 1838 /* variable declaration in for loop */ 1839 c99ism(325); 1840 for1(NULL, $6, $8); 1841 clear_warning_flags(); 1842 } 1843 | for_start 1844 expression_opt T_SEMI 1845 expression_opt T_SEMI 1846 expression_opt T_RPAREN { 1847 for1($2, $4, $6); 1848 clear_warning_flags(); 1849 } 1850 ; 1851 1852 jump_statement: /* C99 6.8.6 */ 1853 goto identifier T_SEMI { 1854 do_goto(getsym($2)); 1855 } 1856 | goto error T_SEMI { 1857 symtyp = FVFT; 1858 } 1859 | T_CONTINUE T_SEMI { 1860 do_continue(); 1861 } 1862 | T_BREAK T_SEMI { 1863 do_break(); 1864 } 1865 | T_RETURN sys T_SEMI { 1866 do_return($2, NULL); 1867 } 1868 | T_RETURN sys expression T_SEMI { 1869 do_return($2, $3); 1870 } 1871 ; 1872 1873 goto: /* see C99 6.8.6 */ 1874 T_GOTO { 1875 symtyp = FLABEL; 1876 } 1877 ; 1878 1879 asm_statement: /* GCC extension */ 1880 T_ASM T_LPAREN read_until_rparen T_SEMI { 1881 setasm(); 1882 } 1883 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1884 setasm(); 1885 } 1886 | T_ASM error 1887 ; 1888 1889 read_until_rparen: /* helper for 'asm_statement' */ 1890 /* empty */ { 1891 read_until_rparen(); 1892 } 1893 ; 1894 1895 translation_unit: /* C99 6.9 */ 1896 external_declaration 1897 | translation_unit external_declaration 1898 ; 1899 1900 external_declaration: /* C99 6.9 */ 1901 function_definition { 1902 global_clean_up_decl(false); 1903 clear_warning_flags(); 1904 } 1905 | top_level_declaration { 1906 global_clean_up_decl(false); 1907 clear_warning_flags(); 1908 } 1909 | asm_statement /* GCC extension */ 1910 | T_SEMI { /* GCC extension */ 1911 if (sflag) { 1912 /* empty declaration */ 1913 error(0); 1914 } else if (!tflag) { 1915 /* empty declaration */ 1916 warning(0); 1917 } 1918 } 1919 ; 1920 1921 /* 1922 * On the top level, lint allows several forms of declarations that it doesn't 1923 * allow in functions. For example, a single ';' is an empty declaration and 1924 * is supported by some compilers, but in a function it would be an empty 1925 * statement, not a declaration. This makes a difference in C90 mode, where 1926 * a statement must not be followed by a declaration. 1927 * 1928 * See 'declaration' for all other declarations. 1929 */ 1930 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1931 begin_type end_type notype_init_declarators T_SEMI { 1932 if (sflag) { 1933 /* old style declaration; add 'int' */ 1934 error(1); 1935 } else if (!tflag) { 1936 /* old style declaration; add 'int' */ 1937 warning(1); 1938 } 1939 } 1940 | declaration 1941 | error T_SEMI { 1942 global_clean_up(); 1943 } 1944 | error T_RBRACE { 1945 global_clean_up(); 1946 } 1947 ; 1948 1949 function_definition: /* C99 6.9.1 */ 1950 func_declarator { 1951 if ($1->s_type->t_tspec != FUNC) { 1952 /* syntax error '%s' */ 1953 error(249, yytext); 1954 YYERROR; 1955 } 1956 if ($1->s_type->t_typedef) { 1957 /* ()-less function definition */ 1958 error(64); 1959 YYERROR; 1960 } 1961 funcdef($1); 1962 block_level++; 1963 begin_declaration_level(OLD_STYLE_ARG); 1964 if (lwarn == LWARN_NONE) 1965 $1->s_used = true; 1966 } arg_declaration_list_opt { 1967 end_declaration_level(); 1968 block_level--; 1969 check_func_lint_directives(); 1970 check_func_old_style_arguments(); 1971 begin_control_statement(CS_FUNCTION_BODY); 1972 } compound_statement { 1973 funcend(); 1974 end_control_statement(CS_FUNCTION_BODY); 1975 } 1976 ; 1977 1978 func_declarator: 1979 begin_type end_type notype_declarator { 1980 /* ^^ There is no check for the missing type-specifier. */ 1981 $$ = $3; 1982 } 1983 | begin_type_declmods end_type notype_declarator { 1984 /* ^^ There is no check for the missing type-specifier. */ 1985 $$ = $3; 1986 } 1987 | begin_type_declaration_specifiers end_type type_declarator { 1988 $$ = $3; 1989 } 1990 ; 1991 1992 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1993 /* empty */ 1994 | arg_declaration_list 1995 ; 1996 1997 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 1998 arg_declaration 1999 | arg_declaration_list arg_declaration 2000 /* XXX or better "arg_declaration error" ? */ 2001 | error 2002 ; 2003 2004 /* 2005 * "arg_declaration" is separated from "declaration" because it 2006 * needs other error handling. 2007 */ 2008 arg_declaration: 2009 begin_type_declmods end_type T_SEMI { 2010 /* empty declaration */ 2011 warning(2); 2012 } 2013 | begin_type_declmods end_type notype_init_declarators T_SEMI 2014 | begin_type_declaration_specifiers end_type T_SEMI { 2015 if (!dcs->d_nonempty_decl) { 2016 /* empty declaration */ 2017 warning(2); 2018 } else { 2019 /* '%s' declared in argument declaration list */ 2020 warning(3, type_name(dcs->d_type)); 2021 } 2022 } 2023 | begin_type_declaration_specifiers end_type 2024 type_init_declarators T_SEMI { 2025 if (dcs->d_nonempty_decl) { 2026 /* '%s' declared in argument declaration list */ 2027 warning(3, type_name(dcs->d_type)); 2028 } 2029 } 2030 | begin_type_declmods error 2031 | begin_type_declaration_specifiers error 2032 ; 2033 2034 gcc_attribute_list_opt: 2035 /* empty */ 2036 | gcc_attribute_list 2037 ; 2038 2039 gcc_attribute_list: 2040 gcc_attribute 2041 | gcc_attribute_list gcc_attribute 2042 ; 2043 2044 gcc_attribute: 2045 T_ATTRIBUTE T_LPAREN T_LPAREN { 2046 in_gcc_attribute = true; 2047 } gcc_attribute_spec_list { 2048 in_gcc_attribute = false; 2049 } T_RPAREN T_RPAREN 2050 ; 2051 2052 gcc_attribute_spec_list: 2053 gcc_attribute_spec 2054 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2055 ; 2056 2057 gcc_attribute_spec: 2058 /* empty */ 2059 | T_AT_ALWAYS_INLINE 2060 | T_AT_ALIAS T_LPAREN string T_RPAREN 2061 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2062 | T_AT_ALIGNED 2063 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2064 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2065 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2066 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2067 | T_AT_COLD 2068 | T_AT_COMMON 2069 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2070 | T_AT_CONSTRUCTOR 2071 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2072 | T_AT_DEPRECATED 2073 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2074 | T_AT_DESTRUCTOR 2075 | T_AT_DISABLE_SANITIZER_INSTRUMENTATION 2076 | T_AT_FALLTHROUGH { 2077 fallthru(1); 2078 } 2079 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2080 constant_expr T_COMMA constant_expr T_RPAREN 2081 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2082 | T_AT_GNU_INLINE 2083 | T_AT_HOT 2084 | T_AT_MALLOC 2085 | T_AT_MAY_ALIAS 2086 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2087 | T_AT_NO_SANITIZE T_LPAREN T_NAME T_RPAREN 2088 | T_AT_NO_SANITIZE_THREAD 2089 | T_AT_NOINLINE 2090 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2091 | T_AT_NONNULL 2092 | T_AT_NONSTRING 2093 | T_AT_NORETURN 2094 | T_AT_NOTHROW 2095 | T_AT_NO_INSTRUMENT_FUNCTION 2096 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2097 | T_AT_OPTNONE 2098 | T_AT_PACKED { 2099 addpacked(); 2100 } 2101 | T_AT_PCS T_LPAREN string T_RPAREN 2102 | T_AT_PURE 2103 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2104 | T_AT_RETURNS_NONNULL 2105 | T_AT_RETURNS_TWICE 2106 | T_AT_SECTION T_LPAREN string T_RPAREN 2107 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2108 | T_AT_SENTINEL 2109 | T_AT_TARGET T_LPAREN string T_RPAREN 2110 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2111 | T_AT_TUNION 2112 | T_AT_UNUSED { 2113 add_attr_used(); 2114 } 2115 | T_AT_USED { 2116 add_attr_used(); 2117 } 2118 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2119 | T_AT_WARN_UNUSED_RESULT 2120 | T_AT_WEAK 2121 | T_QUAL { 2122 if ($1 != CONST) 2123 yyerror("Bad attribute"); 2124 } 2125 ; 2126 2127 gcc_attribute_bounded: 2128 T_AT_MINBYTES 2129 | T_AT_STRING 2130 | T_AT_BUFFER 2131 ; 2132 2133 gcc_attribute_format: 2134 T_AT_FORMAT_GNU_PRINTF 2135 | T_AT_FORMAT_PRINTF 2136 | T_AT_FORMAT_SCANF 2137 | T_AT_FORMAT_STRFMON 2138 | T_AT_FORMAT_STRFTIME 2139 | T_AT_FORMAT_SYSLOG 2140 ; 2141 2142 sys: 2143 /* empty */ { 2144 $$ = in_system_header; 2145 } 2146 ; 2147 2148 %% 2149 2150 /* ARGSUSED */ 2151 int 2152 yyerror(const char *msg) 2153 { 2154 /* syntax error '%s' */ 2155 error(249, yytext); 2156 if (++sytxerr >= 5) 2157 norecover(); 2158 return 0; 2159 } 2160 2161 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2162 || (defined(YYDEBUG) && defined(YYBISON)) 2163 static const char * 2164 cgram_to_string(int token, YYSTYPE val) 2165 { 2166 2167 switch (token) { 2168 case T_INCDEC: 2169 case T_MULTIPLICATIVE: 2170 case T_ADDITIVE: 2171 case T_SHIFT: 2172 case T_RELATIONAL: 2173 case T_EQUALITY: 2174 case T_OPASSIGN: 2175 return modtab[val.y_op].m_name; 2176 case T_SCLASS: 2177 return scl_name(val.y_scl); 2178 case T_TYPE: 2179 case T_STRUCT_OR_UNION: 2180 return tspec_name(val.y_tspec); 2181 case T_QUAL: 2182 return tqual_name(val.y_tqual); 2183 case T_NAME: 2184 return val.y_name->sb_name; 2185 default: 2186 return "<none>"; 2187 } 2188 } 2189 #endif 2190 2191 #if defined(YYDEBUG) && defined(YYBISON) 2192 static inline void 2193 cgram_print(FILE *output, int token, YYSTYPE val) 2194 { 2195 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2196 } 2197 #endif 2198 2199 static void 2200 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2201 { 2202 declare(decl, initflg, renaming); 2203 if (renaming != NULL) 2204 freeyyv(&renaming, T_NAME); 2205 } 2206 2207 /* 2208 * Discard all input tokens up to and including the next 2209 * unmatched right paren 2210 */ 2211 static void 2212 read_until_rparen(void) 2213 { 2214 int level; 2215 2216 if (yychar < 0) 2217 yychar = yylex(); 2218 freeyyv(&yylval, yychar); 2219 2220 level = 1; 2221 while (yychar != T_RPAREN || --level > 0) { 2222 if (yychar == T_LPAREN) { 2223 level++; 2224 } else if (yychar <= 0) { 2225 break; 2226 } 2227 freeyyv(&yylval, yychar = yylex()); 2228 } 2229 2230 yyclearin; 2231 } 2232 2233 static sym_t * 2234 symbolrename(sym_t *s, sbuf_t *sb) 2235 { 2236 if (sb != NULL) 2237 s->s_rename = sb->sb_name; 2238 return s; 2239 } 2240
Indexes created Fri Oct 03 02:09:57 GMT 2025