cgram.y revision 1.362
1 %{ 2 /* $NetBSD: cgram.y,v 1.362 2021/09/13 06:11:51 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 1.362 2021/09/13 06:11:51 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 }; 147 148 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 149 %token T_POINT T_ARROW 150 %token T_COMPLEMENT T_LOGNOT 151 %token <y_op> T_INCDEC 152 %token T_SIZEOF 153 %token T_BUILTIN_OFFSETOF 154 %token T_TYPEOF 155 %token T_EXTENSION 156 %token T_ALIGNAS 157 %token T_ALIGNOF 158 %token T_ASTERISK 159 %token <y_op> T_MULTIPLICATIVE 160 %token <y_op> T_ADDITIVE 161 %token <y_op> T_SHIFT 162 %token <y_op> T_RELATIONAL 163 %token <y_op> T_EQUALITY 164 %token T_AMPER 165 %token T_BITXOR 166 %token T_BITOR 167 %token T_LOGAND 168 %token T_LOGOR 169 %token T_QUEST 170 %token T_COLON 171 %token T_ASSIGN 172 %token <y_op> T_OPASSIGN 173 %token T_COMMA 174 %token T_SEMI 175 %token T_ELLIPSIS 176 %token T_REAL 177 %token T_IMAG 178 %token T_GENERIC 179 %token T_NORETURN 180 181 /* storage classes (extern, static, auto, register and typedef) */ 182 %token <y_scl> T_SCLASS 183 184 /* 185 * predefined type keywords (char, int, short, long, unsigned, signed, 186 * float, double, void); see T_TYPENAME for types from typedef 187 */ 188 %token <y_tspec> T_TYPE 189 190 /* qualifiers (const, volatile, restrict, _Thread_local) */ 191 %token <y_tqual> T_QUAL 192 193 /* struct or union */ 194 %token <y_tspec> T_STRUCT_OR_UNION 195 196 /* remaining keywords */ 197 %token T_ASM 198 %token T_BREAK 199 %token T_CASE 200 %token T_CONTINUE 201 %token T_DEFAULT 202 %token T_DO 203 %token T_ELSE 204 %token T_ENUM 205 %token T_FOR 206 %token T_GOTO 207 %token T_IF 208 %token T_PACKED 209 %token T_RETURN 210 %token T_SWITCH 211 %token T_SYMBOLRENAME 212 %token T_WHILE 213 214 %token T_ATTRIBUTE 215 %token T_AT_ALIAS 216 %token T_AT_ALIGNED 217 %token T_AT_ALLOC_SIZE 218 %token T_AT_ALWAYS_INLINE 219 %token T_AT_BOUNDED 220 %token T_AT_BUFFER 221 %token T_AT_COLD 222 %token T_AT_COMMON 223 %token T_AT_CONSTRUCTOR 224 %token T_AT_DEPRECATED 225 %token T_AT_DESTRUCTOR 226 %token T_AT_FALLTHROUGH 227 %token T_AT_FORMAT 228 %token T_AT_FORMAT_ARG 229 %token T_AT_FORMAT_GNU_PRINTF 230 %token T_AT_FORMAT_PRINTF 231 %token T_AT_FORMAT_SCANF 232 %token T_AT_FORMAT_STRFMON 233 %token T_AT_FORMAT_STRFTIME 234 %token T_AT_FORMAT_SYSLOG 235 %token T_AT_GNU_INLINE 236 %token T_AT_HOT 237 %token T_AT_MALLOC 238 %token T_AT_MAY_ALIAS 239 %token T_AT_MINBYTES 240 %token T_AT_MODE 241 %token T_AT_NOINLINE 242 %token T_AT_NONNULL 243 %token T_AT_NONSTRING 244 %token T_AT_NORETURN 245 %token T_AT_NOTHROW 246 %token T_AT_NO_INSTRUMENT_FUNCTION 247 %token T_AT_OPTIMIZE 248 %token T_AT_PACKED 249 %token T_AT_PCS 250 %token T_AT_PURE 251 %token T_AT_REGPARM 252 %token T_AT_RETURNS_NONNULL 253 %token T_AT_RETURNS_TWICE 254 %token T_AT_SECTION 255 %token T_AT_SENTINEL 256 %token T_AT_STRING 257 %token T_AT_TLS_MODEL 258 %token T_AT_TUNION 259 %token T_AT_UNUSED 260 %token T_AT_USED 261 %token T_AT_VISIBILITY 262 %token T_AT_WARN_UNUSED_RESULT 263 %token T_AT_WEAK 264 265 %left T_THEN 266 %left T_ELSE 267 %right T_QUEST T_COLON 268 %left T_LOGOR 269 %left T_LOGAND 270 %left T_BITOR 271 %left T_BITXOR 272 %left T_AMPER 273 %left T_EQUALITY 274 %left T_RELATIONAL 275 %left T_SHIFT 276 %left T_ADDITIVE 277 %left T_ASTERISK T_MULTIPLICATIVE 278 279 %token <y_name> T_NAME 280 %token <y_name> T_TYPENAME 281 %token <y_val> T_CON 282 %token <y_string> T_STRING 283 284 %type <y_sym> identifier_sym 285 %type <y_name> identifier 286 %type <y_string> string 287 %type <y_string> string2 288 289 %type <y_tnode> primary_expression 290 %type <y_tnode> generic_selection 291 %type <y_generic> generic_assoc_list 292 %type <y_generic> generic_association 293 %type <y_tnode> postfix_expression 294 %type <y_tnode> gcc_statement_expr_list 295 %type <y_tnode> gcc_statement_expr_item 296 %type <y_op> point_or_arrow 297 %type <y_tnode> argument_expression_list 298 %type <y_tnode> unary_expression 299 %type <y_tnode> cast_expression 300 %type <y_tnode> conditional_expression 301 %type <y_tnode> assignment_expression 302 %type <y_tnode> expression_opt 303 %type <y_tnode> expression 304 %type <y_tnode> constant_expr 305 306 %type <y_type> begin_type_typespec 307 %type <y_type> type_specifier 308 %type <y_type> notype_type_specifier 309 %type <y_type> struct_or_union_specifier 310 %type <y_tspec> struct_or_union 311 %type <y_sym> braced_struct_declaration_list 312 %type <y_sym> struct_declaration_list_with_rbrace 313 %type <y_sym> struct_declaration_list 314 %type <y_sym> struct_declaration 315 %type <y_sym> notype_struct_declarators 316 %type <y_sym> type_struct_declarators 317 %type <y_sym> notype_struct_declarator 318 %type <y_sym> type_struct_declarator 319 %type <y_type> enum_specifier 320 %type <y_sym> enum_declaration 321 %type <y_sym> enums_with_opt_comma 322 %type <y_sym> enumerator_list 323 %type <y_sym> enumerator 324 %type <y_qual_ptr> type_qualifier 325 %type <y_qual_ptr> pointer 326 %type <y_qual_ptr> asterisk 327 %type <y_qual_ptr> type_qualifier_list_opt 328 %type <y_qual_ptr> type_qualifier_list 329 %type <y_sym> notype_declarator 330 %type <y_sym> type_declarator 331 %type <y_sym> notype_direct_declarator 332 %type <y_sym> type_direct_declarator 333 %type <y_sym> type_param_declarator 334 %type <y_sym> notype_param_declarator 335 %type <y_sym> direct_param_declarator 336 %type <y_sym> direct_notype_param_declarator 337 %type <y_sym> param_list 338 %type <y_tnode> array_size 339 %type <y_sym> identifier_list 340 %type <y_type> type_name 341 %type <y_sym> abstract_declaration 342 %type <y_sym> abstract_declarator 343 %type <y_sym> direct_abstract_declarator 344 %type <y_sym> abstract_decl_param_list 345 %type <y_sym> vararg_parameter_type_list 346 %type <y_sym> parameter_type_list 347 %type <y_sym> parameter_declaration 348 %type <y_range> range 349 %type <y_name> asm_or_symbolrename_opt 350 351 %type <y_seen_statement> block_item_list 352 %type <y_seen_statement> block_item 353 %type <y_tnode> do_while_expr 354 %type <y_sym> func_declarator 355 356 %{ 357 #if defined(YYDEBUG) && defined(YYBISON) 358 static void cgram_print(FILE *, int, YYSTYPE); 359 #endif 360 %} 361 362 %% 363 364 program: 365 /* empty */ { 366 if (sflag) { 367 /* empty translation unit */ 368 error(272); 369 } else if (!tflag) { 370 /* empty translation unit */ 371 warning(272); 372 } 373 } 374 | translation_unit 375 ; 376 377 identifier_sym: /* helper for struct/union/enum */ 378 identifier { 379 $$ = getsym($1); 380 } 381 ; 382 383 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 384 identifier: 385 T_NAME { 386 debug_step("cgram: name '%s'", $1->sb_name); 387 $$ = $1; 388 } 389 | T_TYPENAME { 390 debug_step("cgram: typename '%s'", $1->sb_name); 391 $$ = $1; 392 } 393 ; 394 395 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 396 string: 397 T_STRING 398 | T_STRING string2 { 399 $$ = cat_strings($1, $2); 400 } 401 ; 402 403 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 404 string2: 405 T_STRING { 406 if (tflag) { 407 /* concatenated strings are illegal in traditional C */ 408 warning(219); 409 } 410 $$ = $1; 411 } 412 | string2 T_STRING { 413 $$ = cat_strings($1, $2); 414 } 415 ; 416 417 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 418 primary_expression: 419 T_NAME { 420 /* XXX really necessary? */ 421 if (yychar < 0) 422 yychar = yylex(); 423 $$ = build_name(getsym($1), yychar); 424 } 425 | T_CON { 426 $$ = build_constant(gettyp($1->v_tspec), $1); 427 } 428 | string { 429 $$ = build_string($1); 430 } 431 | T_LPAREN expression T_RPAREN { 432 if ($2 != NULL) 433 $2->tn_parenthesized = true; 434 $$ = $2; 435 } 436 | generic_selection 437 /* GCC primary-expression, see c_parser_postfix_expression */ 438 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 439 symtyp = FMEMBER; 440 $$ = build_offsetof($3, getsym($5)); 441 } 442 ; 443 444 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 445 generic_selection: 446 T_GENERIC T_LPAREN assignment_expression T_COMMA 447 generic_assoc_list T_RPAREN { 448 /* generic selection requires C11 or later */ 449 c11ism(345); 450 $$ = build_generic_selection($3, $5); 451 } 452 ; 453 454 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 455 generic_assoc_list: 456 generic_association 457 | generic_assoc_list T_COMMA generic_association { 458 $3->ga_prev = $1; 459 $$ = $3; 460 } 461 ; 462 463 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 464 generic_association: 465 type_name T_COLON assignment_expression { 466 $$ = getblk(sizeof(*$$)); 467 $$->ga_arg = $1; 468 $$->ga_result = $3; 469 } 470 | T_DEFAULT T_COLON assignment_expression { 471 $$ = getblk(sizeof(*$$)); 472 $$->ga_arg = NULL; 473 $$->ga_result = $3; 474 } 475 ; 476 477 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 478 postfix_expression: 479 primary_expression 480 | postfix_expression T_LBRACK expression T_RBRACK { 481 $$ = build_unary(INDIR, build_binary($1, PLUS, $3)); 482 } 483 | postfix_expression T_LPAREN T_RPAREN { 484 $$ = build_function_call($1, NULL); 485 } 486 | postfix_expression T_LPAREN argument_expression_list T_RPAREN { 487 $$ = build_function_call($1, $3); 488 } 489 | postfix_expression point_or_arrow T_NAME { 490 $$ = build_member_access($1, $2, $3); 491 } 492 | postfix_expression T_INCDEC { 493 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $1); 494 } 495 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 496 sym_t *tmp = mktempsym($2); 497 begin_initialization(tmp); 498 cgram_declare(tmp, true, NULL); 499 } init_lbrace initializer_list comma_opt init_rbrace { 500 if (!Sflag) 501 /* compound literals are a C9X/GCC extension */ 502 gnuism(319); 503 $$ = build_name(*current_initsym(), 0); 504 end_initialization(); 505 } 506 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 507 block_level--; 508 mem_block_level--; 509 begin_initialization(mktempsym(dup_type($3->tn_type))); 510 mem_block_level++; 511 block_level++; 512 /* ({ }) is a GCC extension */ 513 gnuism(320); 514 } compound_statement_rbrace T_RPAREN { 515 $$ = build_name(*current_initsym(), 0); 516 end_initialization(); 517 } 518 ; 519 520 comma_opt: /* helper for 'postfix_expression' */ 521 /* empty */ 522 | T_COMMA 523 ; 524 525 /* 526 * The inner part of a GCC statement-expression of the form ({ ... }). 527 * 528 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 529 */ 530 gcc_statement_expr_list: 531 gcc_statement_expr_item 532 | gcc_statement_expr_list gcc_statement_expr_item { 533 $$ = $2; 534 } 535 ; 536 537 gcc_statement_expr_item: 538 declaration_or_error { 539 clear_warning_flags(); 540 $$ = NULL; 541 } 542 | non_expr_statement { 543 $$ = expr_zalloc_tnode(); 544 $$->tn_type = gettyp(VOID); 545 } 546 | expression T_SEMI { 547 if ($1 == NULL) { /* in case of syntax errors */ 548 $$ = expr_zalloc_tnode(); 549 $$->tn_type = gettyp(VOID); 550 } else { 551 /* XXX: do that only on the last name */ 552 if ($1->tn_op == NAME) 553 $1->tn_sym->s_used = true; 554 expr($1, false, false, false, false); 555 seen_fallthrough = false; 556 $$ = $1; 557 } 558 } 559 ; 560 561 point_or_arrow: /* helper for 'postfix_expression' */ 562 T_POINT { 563 symtyp = FMEMBER; 564 $$ = POINT; 565 } 566 | T_ARROW { 567 symtyp = FMEMBER; 568 $$ = ARROW; 569 } 570 ; 571 572 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 573 argument_expression_list: 574 assignment_expression { 575 $$ = build_function_argument(NULL, $1); 576 } 577 | argument_expression_list T_COMMA assignment_expression { 578 $$ = build_function_argument($1, $3); 579 } 580 ; 581 582 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 583 unary_expression: 584 postfix_expression 585 | T_INCDEC unary_expression { 586 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2); 587 } 588 | T_AMPER cast_expression { 589 $$ = build_unary(ADDR, $2); 590 } 591 | T_ASTERISK cast_expression { 592 $$ = build_unary(INDIR, $2); 593 } 594 | T_ADDITIVE cast_expression { 595 if (tflag && $1 == PLUS) { 596 /* unary + is illegal in traditional C */ 597 warning(100); 598 } 599 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2); 600 } 601 | T_COMPLEMENT cast_expression { 602 $$ = build_unary(COMPL, $2); 603 } 604 | T_LOGNOT cast_expression { 605 $$ = build_unary(NOT, $2); 606 } 607 | T_REAL cast_expression { /* GCC c_parser_unary_expression */ 608 $$ = build_unary(REAL, $2); 609 } 610 | T_IMAG cast_expression { /* GCC c_parser_unary_expression */ 611 $$ = build_unary(IMAG, $2); 612 } 613 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 614 $$ = $2; 615 } 616 | T_SIZEOF unary_expression { 617 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 618 if ($$ != NULL) 619 check_expr_misc($2, 620 false, false, false, false, false, true); 621 } 622 | T_SIZEOF T_LPAREN type_name T_RPAREN { 623 $$ = build_sizeof($3); 624 } 625 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 626 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 627 /* TODO: c11ism */ 628 $$ = build_alignof($3); 629 } 630 ; 631 632 /* The rule 'unary_operator' is inlined into unary_expression. */ 633 634 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 635 cast_expression: 636 unary_expression 637 | T_LPAREN type_name T_RPAREN cast_expression { 638 $$ = cast($4, $2); 639 } 640 ; 641 642 expression_opt: 643 /* empty */ { 644 $$ = NULL; 645 } 646 | expression 647 ; 648 649 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 650 /* 'conditional_expression' also implements 'additive_expression'. */ 651 /* 'conditional_expression' also implements 'shift_expression'. */ 652 /* 'conditional_expression' also implements 'relational_expression'. */ 653 /* 'conditional_expression' also implements 'equality_expression'. */ 654 /* 'conditional_expression' also implements 'AND_expression'. */ 655 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 656 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 657 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 658 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 659 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 660 conditional_expression: 661 cast_expression 662 | conditional_expression T_ASTERISK conditional_expression { 663 $$ = build_binary($1, MULT, $3); 664 } 665 | conditional_expression T_MULTIPLICATIVE conditional_expression { 666 $$ = build_binary($1, $2, $3); 667 } 668 | conditional_expression T_ADDITIVE conditional_expression { 669 $$ = build_binary($1, $2, $3); 670 } 671 | conditional_expression T_SHIFT conditional_expression { 672 $$ = build_binary($1, $2, $3); 673 } 674 | conditional_expression T_RELATIONAL conditional_expression { 675 $$ = build_binary($1, $2, $3); 676 } 677 | conditional_expression T_EQUALITY conditional_expression { 678 $$ = build_binary($1, $2, $3); 679 } 680 | conditional_expression T_AMPER conditional_expression { 681 $$ = build_binary($1, BITAND, $3); 682 } 683 | conditional_expression T_BITXOR conditional_expression { 684 $$ = build_binary($1, BITXOR, $3); 685 } 686 | conditional_expression T_BITOR conditional_expression { 687 $$ = build_binary($1, BITOR, $3); 688 } 689 | conditional_expression T_LOGAND conditional_expression { 690 $$ = build_binary($1, LOGAND, $3); 691 } 692 | conditional_expression T_LOGOR conditional_expression { 693 $$ = build_binary($1, LOGOR, $3); 694 } 695 | conditional_expression T_QUEST expression 696 T_COLON conditional_expression { 697 $$ = build_binary($1, QUEST, build_binary($3, COLON, $5)); 698 } 699 ; 700 701 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 702 assignment_expression: 703 conditional_expression 704 | unary_expression T_ASSIGN assignment_expression { 705 $$ = build_binary($1, ASSIGN, $3); 706 } 707 | unary_expression T_OPASSIGN assignment_expression { 708 $$ = build_binary($1, $2, $3); 709 } 710 ; 711 712 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 713 expression: 714 assignment_expression 715 | expression T_COMMA assignment_expression { 716 $$ = build_binary($1, COMMA, $3); 717 } 718 ; 719 720 constant_expr_list_opt: /* helper for gcc_attribute */ 721 /* empty */ 722 | constant_expr_list 723 ; 724 725 constant_expr_list: /* helper for gcc_attribute */ 726 constant_expr 727 | constant_expr_list T_COMMA constant_expr 728 ; 729 730 constant_expr: /* C99 6.6 */ 731 conditional_expression 732 ; 733 734 declaration_or_error: 735 declaration 736 | error T_SEMI 737 ; 738 739 declaration: /* C99 6.7 */ 740 begin_type_declmods end_type T_SEMI { 741 if (dcs->d_scl == TYPEDEF) { 742 /* typedef declares no type name */ 743 warning(72); 744 } else { 745 /* empty declaration */ 746 warning(2); 747 } 748 } 749 | begin_type_declmods end_type notype_init_declarators T_SEMI 750 /* ^^ There is no check for the missing type-specifier. */ 751 | begin_type_declaration_specifiers end_type T_SEMI { 752 if (dcs->d_scl == TYPEDEF) { 753 /* typedef declares no type name */ 754 warning(72); 755 } else if (!dcs->d_nonempty_decl) { 756 /* empty declaration */ 757 warning(2); 758 } 759 } 760 | begin_type_declaration_specifiers end_type 761 type_init_declarators T_SEMI 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 $$ = NULL; 977 } 978 | begin_type_specifier_qualifier_list end_type type_attribute_opt 979 T_SEMI { 980 symtyp = FVFT; 981 if (!Sflag) 982 /* anonymous struct/union members is a C9X feature */ 983 warning(49); 984 if (is_struct_or_union(dcs->d_type->t_tspec)) { 985 $$ = 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 | error T_SEMI { 995 symtyp = FVFT; 996 $$ = NULL; 997 } 998 ; 999 1000 notype_struct_declarators: 1001 notype_struct_declarator { 1002 $$ = declarator_1_struct_union($1); 1003 } 1004 | notype_struct_declarators { 1005 symtyp = FMEMBER; 1006 } T_COMMA type_struct_declarator { 1007 $$ = lnklst($1, declarator_1_struct_union($4)); 1008 } 1009 ; 1010 1011 type_struct_declarators: 1012 type_struct_declarator { 1013 $$ = declarator_1_struct_union($1); 1014 } 1015 | type_struct_declarators { 1016 symtyp = FMEMBER; 1017 } T_COMMA type_struct_declarator { 1018 $$ = lnklst($1, declarator_1_struct_union($4)); 1019 } 1020 ; 1021 1022 notype_struct_declarator: 1023 notype_declarator 1024 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1025 $$ = bitfield($1, to_int_constant($3, true)); 1026 } 1027 | { 1028 symtyp = FVFT; 1029 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1030 $$ = bitfield(NULL, to_int_constant($3, true)); 1031 } 1032 ; 1033 1034 type_struct_declarator: 1035 type_declarator 1036 | type_declarator T_COLON constant_expr { 1037 $$ = bitfield($1, to_int_constant($3, true)); 1038 } 1039 | { 1040 symtyp = FVFT; 1041 } T_COLON constant_expr { 1042 $$ = bitfield(NULL, to_int_constant($3, true)); 1043 } 1044 ; 1045 1046 enum_specifier: /* C99 6.7.2.2 */ 1047 enum gcc_attribute_list_opt identifier_sym { 1048 $$ = mktag($3, ENUM, false, false); 1049 } 1050 | enum gcc_attribute_list_opt identifier_sym { 1051 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1052 } enum_declaration /*gcc_attribute_list_opt*/ { 1053 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1054 } 1055 | enum gcc_attribute_list_opt { 1056 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1057 } enum_declaration /*gcc_attribute_list_opt*/ { 1058 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1059 } 1060 | enum error { 1061 symtyp = FVFT; 1062 $$ = gettyp(INT); 1063 } 1064 ; 1065 1066 enum: /* helper for C99 6.7.2.2 */ 1067 T_ENUM { 1068 symtyp = FTAG; 1069 begin_declaration_level(CTCONST); 1070 } 1071 ; 1072 1073 enum_declaration: /* helper for C99 6.7.2.2 */ 1074 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1075 $$ = $2; 1076 } 1077 ; 1078 1079 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1080 T_LBRACE { 1081 symtyp = FVFT; 1082 enumval = 0; 1083 } 1084 ; 1085 1086 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1087 enumerator_list 1088 | enumerator_list T_COMMA { 1089 if (sflag) { 1090 /* trailing ',' prohibited in enum declaration */ 1091 error(54); 1092 } else { 1093 /* trailing ',' prohibited in enum declaration */ 1094 c99ism(54); 1095 } 1096 $$ = $1; 1097 } 1098 ; 1099 1100 enumerator_list: /* C99 6.7.2.2 */ 1101 enumerator 1102 | enumerator_list T_COMMA enumerator { 1103 $$ = lnklst($1, $3); 1104 } 1105 | error { 1106 $$ = NULL; 1107 } 1108 ; 1109 1110 enumerator: /* C99 6.7.2.2 */ 1111 identifier_sym gcc_attribute_list_opt { 1112 $$ = enumeration_constant($1, enumval, true); 1113 } 1114 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1115 $$ = enumeration_constant($1, to_int_constant($4, true), 1116 false); 1117 } 1118 ; 1119 1120 type_qualifier: /* C99 6.7.3 */ 1121 T_QUAL { 1122 $$ = xcalloc(1, sizeof(*$$)); 1123 if ($1 == CONST) 1124 $$->p_const = true; 1125 if ($1 == VOLATILE) 1126 $$->p_volatile = true; 1127 } 1128 ; 1129 1130 pointer: /* C99 6.7.5 */ 1131 asterisk type_qualifier_list_opt { 1132 $$ = merge_qualified_pointer($1, $2); 1133 } 1134 | asterisk type_qualifier_list_opt pointer { 1135 $$ = merge_qualified_pointer($1, $2); 1136 $$ = merge_qualified_pointer($$, $3); 1137 } 1138 ; 1139 1140 asterisk: /* helper for 'pointer' */ 1141 T_ASTERISK { 1142 $$ = xcalloc(1, sizeof(*$$)); 1143 $$->p_pointer = true; 1144 } 1145 ; 1146 1147 type_qualifier_list_opt: /* see C99 6.7.5 */ 1148 /* empty */ { 1149 $$ = NULL; 1150 } 1151 | type_qualifier_list 1152 ; 1153 1154 type_qualifier_list: /* C99 6.7.5 */ 1155 type_qualifier 1156 | type_qualifier_list type_qualifier { 1157 $$ = merge_qualified_pointer($1, $2); 1158 } 1159 ; 1160 1161 /* 1162 * For an explanation of 'notype' in the following rules, see 1163 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1164 */ 1165 1166 notype_init_declarators: 1167 notype_init_declarator 1168 | notype_init_declarators T_COMMA type_init_declarator 1169 ; 1170 1171 type_init_declarators: 1172 type_init_declarator 1173 | type_init_declarators T_COMMA type_init_declarator 1174 ; 1175 1176 notype_init_declarator: 1177 notype_declarator asm_or_symbolrename_opt { 1178 cgram_declare($1, false, $2); 1179 check_size($1); 1180 } 1181 | notype_declarator asm_or_symbolrename_opt { 1182 begin_initialization($1); 1183 cgram_declare($1, true, $2); 1184 } T_ASSIGN initializer { 1185 check_size($1); 1186 end_initialization(); 1187 } 1188 ; 1189 1190 type_init_declarator: 1191 type_declarator asm_or_symbolrename_opt { 1192 cgram_declare($1, false, $2); 1193 check_size($1); 1194 } 1195 | type_declarator asm_or_symbolrename_opt { 1196 begin_initialization($1); 1197 cgram_declare($1, true, $2); 1198 } T_ASSIGN initializer { 1199 check_size($1); 1200 end_initialization(); 1201 } 1202 ; 1203 1204 notype_declarator: 1205 notype_direct_declarator 1206 | pointer notype_direct_declarator { 1207 $$ = add_pointer($2, $1); 1208 } 1209 ; 1210 1211 type_declarator: 1212 type_direct_declarator 1213 | pointer type_direct_declarator { 1214 $$ = add_pointer($2, $1); 1215 } 1216 ; 1217 1218 notype_direct_declarator: 1219 T_NAME { 1220 $$ = declarator_name(getsym($1)); 1221 } 1222 | T_LPAREN type_declarator T_RPAREN { 1223 $$ = $2; 1224 } 1225 | type_attribute notype_direct_declarator { 1226 $$ = $2; 1227 } 1228 | notype_direct_declarator T_LBRACK T_RBRACK { 1229 $$ = add_array($1, false, 0); 1230 } 1231 | notype_direct_declarator T_LBRACK array_size T_RBRACK { 1232 $$ = add_array($1, true, to_int_constant($3, false)); 1233 } 1234 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1235 $$ = 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 $$ = $2; 1251 } 1252 | type_direct_declarator T_LBRACK T_RBRACK { 1253 $$ = add_array($1, false, 0); 1254 } 1255 | type_direct_declarator T_LBRACK array_size T_RBRACK { 1256 $$ = add_array($1, true, to_int_constant($3, false)); 1257 } 1258 | type_direct_declarator param_list asm_or_symbolrename_opt { 1259 $$ = add_function(symbolrename($1, $3), $2); 1260 end_declaration_level(); 1261 block_level--; 1262 } 1263 | type_direct_declarator type_attribute 1264 ; 1265 1266 /* 1267 * The two distinct rules type_param_declarator and notype_param_declarator 1268 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1269 * always treated as a typename, not an argument name. For example, after 1270 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1271 * "f(int (double));", not "f(int a);". 1272 */ 1273 type_param_declarator: 1274 direct_param_declarator 1275 | pointer direct_param_declarator { 1276 $$ = add_pointer($2, $1); 1277 } 1278 ; 1279 1280 notype_param_declarator: 1281 direct_notype_param_declarator 1282 | pointer direct_notype_param_declarator { 1283 $$ = add_pointer($2, $1); 1284 } 1285 ; 1286 1287 direct_param_declarator: 1288 identifier type_attribute_list { 1289 $$ = declarator_name(getsym($1)); 1290 } 1291 | identifier { 1292 $$ = declarator_name(getsym($1)); 1293 } 1294 | T_LPAREN notype_param_declarator T_RPAREN { 1295 $$ = $2; 1296 } 1297 | direct_param_declarator T_LBRACK T_RBRACK gcc_attribute_list_opt { 1298 $$ = add_array($1, false, 0); 1299 } 1300 | direct_param_declarator T_LBRACK array_size T_RBRACK 1301 gcc_attribute_list_opt { 1302 $$ = add_array($1, true, to_int_constant($3, false)); 1303 } 1304 | direct_param_declarator param_list asm_or_symbolrename_opt { 1305 $$ = add_function(symbolrename($1, $3), $2); 1306 end_declaration_level(); 1307 block_level--; 1308 } 1309 ; 1310 1311 direct_notype_param_declarator: 1312 identifier { 1313 $$ = declarator_name(getsym($1)); 1314 } 1315 | T_LPAREN notype_param_declarator T_RPAREN { 1316 $$ = $2; 1317 } 1318 | direct_notype_param_declarator T_LBRACK T_RBRACK { 1319 $$ = add_array($1, false, 0); 1320 } 1321 | direct_notype_param_declarator T_LBRACK array_size T_RBRACK { 1322 $$ = add_array($1, true, to_int_constant($3, false)); 1323 } 1324 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1325 $$ = add_function(symbolrename($1, $3), $2); 1326 end_declaration_level(); 1327 block_level--; 1328 } 1329 ; 1330 1331 param_list: 1332 id_list_lparen identifier_list T_RPAREN { 1333 $$ = $2; 1334 } 1335 | abstract_decl_param_list 1336 ; 1337 1338 id_list_lparen: 1339 T_LPAREN { 1340 block_level++; 1341 begin_declaration_level(PROTO_ARG); 1342 } 1343 ; 1344 1345 array_size: 1346 type_qualifier_list_opt T_SCLASS constant_expr { 1347 /* C11 6.7.6.3p7 */ 1348 if ($2 != STATIC) 1349 yyerror("Bad attribute"); 1350 /* static array size is a C11 extension */ 1351 c11ism(343); 1352 $$ = $3; 1353 } 1354 | constant_expr 1355 ; 1356 1357 identifier_list: /* C99 6.7.5 */ 1358 T_NAME { 1359 $$ = old_style_function_name(getsym($1)); 1360 } 1361 | identifier_list T_COMMA T_NAME { 1362 $$ = lnklst($1, old_style_function_name(getsym($3))); 1363 } 1364 | identifier_list error 1365 ; 1366 1367 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1368 type_name: /* C99 6.7.6 */ 1369 { 1370 begin_declaration_level(ABSTRACT); 1371 } abstract_declaration { 1372 end_declaration_level(); 1373 $$ = $2->s_type; 1374 } 1375 ; 1376 1377 abstract_declaration: /* specific to lint */ 1378 begin_type_qualifier_list end_type { 1379 $$ = declare_1_abstract(abstract_name()); 1380 } 1381 | begin_type_specifier_qualifier_list end_type { 1382 $$ = declare_1_abstract(abstract_name()); 1383 } 1384 | begin_type_qualifier_list end_type abstract_declarator { 1385 $$ = declare_1_abstract($3); 1386 } 1387 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1388 $$ = declare_1_abstract($3); 1389 } 1390 ; 1391 1392 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1393 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1394 abstract_declarator: 1395 pointer { 1396 $$ = add_pointer(abstract_name(), $1); 1397 } 1398 | direct_abstract_declarator 1399 | pointer direct_abstract_declarator { 1400 $$ = add_pointer($2, $1); 1401 } 1402 ; 1403 1404 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1405 direct_abstract_declarator: 1406 /* TODO: sort rules according to C99 */ 1407 T_LPAREN abstract_declarator T_RPAREN { 1408 $$ = $2; 1409 } 1410 | T_LBRACK T_RBRACK { 1411 $$ = add_array(abstract_name(), false, 0); 1412 } 1413 /* TODO: T_LBRACK T_ASTERISK T_RBRACK; see below */ 1414 | T_LBRACK array_size T_RBRACK { 1415 $$ = add_array(abstract_name(), true, 1416 to_int_constant($2, false)); 1417 } 1418 | type_attribute direct_abstract_declarator { 1419 $$ = $2; 1420 } 1421 | direct_abstract_declarator T_LBRACK T_RBRACK { 1422 $$ = add_array($1, false, 0); 1423 } 1424 | direct_abstract_declarator T_LBRACK T_ASTERISK T_RBRACK { /* C99 */ 1425 $$ = add_array($1, false, 0); 1426 } 1427 | direct_abstract_declarator T_LBRACK array_size T_RBRACK { 1428 $$ = add_array($1, true, to_int_constant($3, false)); 1429 } 1430 | abstract_decl_param_list asm_or_symbolrename_opt { 1431 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1432 end_declaration_level(); 1433 block_level--; 1434 } 1435 | direct_abstract_declarator abstract_decl_param_list 1436 asm_or_symbolrename_opt { 1437 $$ = add_function(symbolrename($1, $3), $2); 1438 end_declaration_level(); 1439 block_level--; 1440 } 1441 | direct_abstract_declarator type_attribute_list 1442 ; 1443 1444 abstract_decl_param_list: /* specific to lint */ 1445 abstract_decl_lparen T_RPAREN type_attribute_opt { 1446 $$ = NULL; 1447 } 1448 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1449 type_attribute_opt { 1450 dcs->d_proto = true; 1451 $$ = $2; 1452 } 1453 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1454 $$ = NULL; 1455 } 1456 ; 1457 1458 abstract_decl_lparen: /* specific to lint */ 1459 T_LPAREN { 1460 block_level++; 1461 begin_declaration_level(PROTO_ARG); 1462 } 1463 ; 1464 1465 vararg_parameter_type_list: /* specific to lint */ 1466 parameter_type_list 1467 | parameter_type_list T_COMMA T_ELLIPSIS { 1468 dcs->d_vararg = true; 1469 $$ = $1; 1470 } 1471 | T_ELLIPSIS { 1472 if (sflag) { 1473 /* ANSI C requires formal parameter before '...' */ 1474 error(84); 1475 } else if (!tflag) { 1476 /* ANSI C requires formal parameter before '...' */ 1477 warning(84); 1478 } 1479 dcs->d_vararg = true; 1480 $$ = NULL; 1481 } 1482 ; 1483 1484 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1485 parameter_type_list: 1486 parameter_declaration 1487 | parameter_type_list T_COMMA parameter_declaration { 1488 $$ = lnklst($1, $3); 1489 } 1490 ; 1491 1492 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1493 parameter_declaration: 1494 begin_type_declmods end_type { 1495 /* ^^ There is no check for the missing type-specifier. */ 1496 $$ = declare_argument(abstract_name(), false); 1497 } 1498 | begin_type_declaration_specifiers end_type { 1499 $$ = declare_argument(abstract_name(), false); 1500 } 1501 | begin_type_declmods end_type notype_param_declarator { 1502 /* ^^ There is no check for the missing type-specifier. */ 1503 $$ = declare_argument($3, false); 1504 } 1505 /* 1506 * type_param_declarator is needed because of following conflict: 1507 * "typedef int a; f(int (a));" could be parsed as 1508 * "function with argument a of type int", or 1509 * "function with an abstract argument of type function". 1510 * This grammar realizes the second case. 1511 */ 1512 | begin_type_declaration_specifiers end_type type_param_declarator { 1513 $$ = declare_argument($3, false); 1514 } 1515 | begin_type_declmods end_type abstract_declarator { 1516 /* ^^ There is no check for the missing type-specifier. */ 1517 $$ = declare_argument($3, false); 1518 } 1519 | begin_type_declaration_specifiers end_type abstract_declarator { 1520 $$ = declare_argument($3, false); 1521 } 1522 ; 1523 1524 initializer: /* C99 6.7.8 "Initialization" */ 1525 assignment_expression { 1526 init_expr($1); 1527 } 1528 | init_lbrace init_rbrace { 1529 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1530 } 1531 | init_lbrace initializer_list comma_opt init_rbrace 1532 /* XXX: What is this error handling for? */ 1533 | error 1534 ; 1535 1536 initializer_list: /* C99 6.7.8 "Initialization" */ 1537 initializer_list_item 1538 | initializer_list T_COMMA initializer_list_item 1539 ; 1540 1541 initializer_list_item: /* helper */ 1542 designation initializer 1543 | initializer 1544 ; 1545 1546 designation: /* C99 6.7.8 "Initialization" */ 1547 designator_list T_ASSIGN 1548 | identifier T_COLON { 1549 /* GCC style struct or union member name in initializer */ 1550 gnuism(315); 1551 add_designator_member($1); 1552 } 1553 ; 1554 1555 designator_list: /* C99 6.7.8 "Initialization" */ 1556 designator 1557 | designator_list designator 1558 ; 1559 1560 designator: /* C99 6.7.8 "Initialization" */ 1561 T_LBRACK range T_RBRACK { 1562 add_designator_subscript($2); 1563 if (!Sflag) 1564 /* array initializer with designators is a C9X ... */ 1565 warning(321); 1566 } 1567 | T_POINT identifier { 1568 if (!Sflag) 1569 /* struct or union member name in initializer is ... */ 1570 warning(313); 1571 add_designator_member($2); 1572 } 1573 ; 1574 1575 range: 1576 constant_expr { 1577 $$.lo = to_int_constant($1, true); 1578 $$.hi = $$.lo; 1579 } 1580 | constant_expr T_ELLIPSIS constant_expr { 1581 $$.lo = to_int_constant($1, true); 1582 $$.hi = to_int_constant($3, true); 1583 /* initialization with '[a...b]' is a GCC extension */ 1584 gnuism(340); 1585 } 1586 ; 1587 1588 init_lbrace: /* helper */ 1589 T_LBRACE { 1590 init_lbrace(); 1591 } 1592 ; 1593 1594 init_rbrace: /* helper */ 1595 T_RBRACE { 1596 init_rbrace(); 1597 } 1598 ; 1599 1600 asm_or_symbolrename_opt: /* GCC extensions */ 1601 /* empty */ { 1602 $$ = NULL; 1603 } 1604 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1605 freeyyv(&$3, T_STRING); 1606 $$ = NULL; 1607 } 1608 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1609 $$ = $3; 1610 } 1611 ; 1612 1613 statement: /* C99 6.8 */ 1614 expression_statement 1615 | non_expr_statement 1616 ; 1617 1618 non_expr_statement: /* helper for C99 6.8 */ 1619 type_attribute T_SEMI 1620 | labeled_statement 1621 | compound_statement 1622 | selection_statement 1623 | iteration_statement 1624 | jump_statement { 1625 seen_fallthrough = false; 1626 } 1627 | asm_statement 1628 ; 1629 1630 labeled_statement: /* C99 6.8.1 */ 1631 label type_attribute_opt statement 1632 ; 1633 1634 label: 1635 T_NAME T_COLON { 1636 symtyp = FLABEL; 1637 named_label(getsym($1)); 1638 } 1639 | T_CASE constant_expr T_COLON { 1640 case_label($2); 1641 seen_fallthrough = true; 1642 } 1643 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1644 /* XXX: We don't fill all cases */ 1645 case_label($2); 1646 seen_fallthrough = true; 1647 } 1648 | T_DEFAULT T_COLON { 1649 default_label(); 1650 seen_fallthrough = true; 1651 } 1652 ; 1653 1654 compound_statement: /* C99 6.8.2 */ 1655 compound_statement_lbrace compound_statement_rbrace 1656 | compound_statement_lbrace block_item_list compound_statement_rbrace 1657 ; 1658 1659 compound_statement_lbrace: 1660 T_LBRACE { 1661 block_level++; 1662 mem_block_level++; 1663 begin_declaration_level(AUTO); 1664 } 1665 ; 1666 1667 compound_statement_rbrace: 1668 T_RBRACE { 1669 end_declaration_level(); 1670 freeblk(); 1671 mem_block_level--; 1672 block_level--; 1673 seen_fallthrough = false; 1674 } 1675 ; 1676 1677 block_item_list: /* C99 6.8.2 */ 1678 block_item 1679 | block_item_list block_item { 1680 if (!Sflag && $1 && !$2) 1681 /* declarations after statements is a C99 feature */ 1682 c99ism(327); 1683 $$ = $1 || $2; 1684 } 1685 ; 1686 1687 block_item: /* C99 6.8.2 */ 1688 declaration_or_error { 1689 $$ = false; 1690 restore_warning_flags(); 1691 } 1692 | statement { 1693 $$ = true; 1694 restore_warning_flags(); 1695 } 1696 ; 1697 1698 expression_statement: /* C99 6.8.3 */ 1699 expression T_SEMI { 1700 expr($1, false, false, false, false); 1701 seen_fallthrough = false; 1702 } 1703 | T_SEMI { 1704 seen_fallthrough = false; 1705 } 1706 ; 1707 1708 selection_statement: /* C99 6.8.4 */ 1709 if_without_else %prec T_THEN { 1710 save_warning_flags(); 1711 if2(); 1712 if3(false); 1713 } 1714 | if_without_else T_ELSE { 1715 save_warning_flags(); 1716 if2(); 1717 } statement { 1718 clear_warning_flags(); 1719 if3(true); 1720 } 1721 | if_without_else T_ELSE error { 1722 clear_warning_flags(); 1723 if3(false); 1724 } 1725 | switch_expr statement { 1726 clear_warning_flags(); 1727 switch2(); 1728 } 1729 | switch_expr error { 1730 clear_warning_flags(); 1731 switch2(); 1732 } 1733 ; 1734 1735 if_without_else: /* see C99 6.8.4 */ 1736 if_expr statement 1737 | if_expr error 1738 ; 1739 1740 if_expr: /* see C99 6.8.4 */ 1741 T_IF T_LPAREN expression T_RPAREN { 1742 if1($3); 1743 clear_warning_flags(); 1744 } 1745 ; 1746 1747 switch_expr: /* see C99 6.8.4 */ 1748 T_SWITCH T_LPAREN expression T_RPAREN { 1749 switch1($3); 1750 clear_warning_flags(); 1751 } 1752 ; 1753 1754 iteration_statement: /* C99 6.8.5 */ 1755 while_expr statement { 1756 clear_warning_flags(); 1757 while2(); 1758 } 1759 | while_expr error { 1760 clear_warning_flags(); 1761 while2(); 1762 } 1763 | do_statement do_while_expr { 1764 do2($2); 1765 seen_fallthrough = false; 1766 } 1767 | do error { 1768 clear_warning_flags(); 1769 do2(NULL); 1770 } 1771 | for_exprs statement { 1772 clear_warning_flags(); 1773 for2(); 1774 end_declaration_level(); 1775 block_level--; 1776 } 1777 | for_exprs error { 1778 clear_warning_flags(); 1779 for2(); 1780 end_declaration_level(); 1781 block_level--; 1782 } 1783 ; 1784 1785 while_expr: /* see C99 6.8.5 */ 1786 T_WHILE T_LPAREN expression T_RPAREN { 1787 while1($3); 1788 clear_warning_flags(); 1789 } 1790 ; 1791 1792 do_statement: /* see C99 6.8.5 */ 1793 do statement { 1794 clear_warning_flags(); 1795 } 1796 ; 1797 1798 do: /* see C99 6.8.5 */ 1799 T_DO { 1800 do1(); 1801 } 1802 ; 1803 1804 do_while_expr: /* see C99 6.8.5 */ 1805 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1806 $$ = $3; 1807 } 1808 ; 1809 1810 for_start: /* see C99 6.8.5 */ 1811 T_FOR T_LPAREN { 1812 begin_declaration_level(AUTO); 1813 block_level++; 1814 } 1815 ; 1816 1817 for_exprs: /* see C99 6.8.5 */ 1818 for_start 1819 begin_type_declaration_specifiers end_type 1820 notype_init_declarators T_SEMI 1821 expression_opt T_SEMI expression_opt T_RPAREN { 1822 /* variable declaration in for loop */ 1823 c99ism(325); 1824 for1(NULL, $6, $8); 1825 clear_warning_flags(); 1826 } 1827 | for_start 1828 expression_opt T_SEMI 1829 expression_opt T_SEMI 1830 expression_opt T_RPAREN { 1831 for1($2, $4, $6); 1832 clear_warning_flags(); 1833 } 1834 ; 1835 1836 jump_statement: /* C99 6.8.6 */ 1837 goto identifier T_SEMI { 1838 do_goto(getsym($2)); 1839 } 1840 | goto error T_SEMI { 1841 symtyp = FVFT; 1842 } 1843 | T_CONTINUE T_SEMI { 1844 do_continue(); 1845 } 1846 | T_BREAK T_SEMI { 1847 do_break(); 1848 } 1849 | T_RETURN T_SEMI { 1850 do_return(NULL); 1851 } 1852 | T_RETURN expression T_SEMI { 1853 do_return($2); 1854 } 1855 ; 1856 1857 goto: /* see C99 6.8.6 */ 1858 T_GOTO { 1859 symtyp = FLABEL; 1860 } 1861 ; 1862 1863 asm_statement: /* GCC extension */ 1864 T_ASM T_LPAREN read_until_rparen T_SEMI { 1865 setasm(); 1866 } 1867 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1868 setasm(); 1869 } 1870 | T_ASM error 1871 ; 1872 1873 read_until_rparen: /* helper for 'asm_statement' */ 1874 /* empty */ { 1875 read_until_rparen(); 1876 } 1877 ; 1878 1879 translation_unit: /* C99 6.9 */ 1880 external_declaration 1881 | translation_unit external_declaration 1882 ; 1883 1884 external_declaration: /* C99 6.9 */ 1885 function_definition { 1886 global_clean_up_decl(false); 1887 clear_warning_flags(); 1888 } 1889 | top_level_declaration { 1890 global_clean_up_decl(false); 1891 clear_warning_flags(); 1892 } 1893 | asm_statement /* GCC extension */ 1894 | T_SEMI { /* GCC extension */ 1895 if (sflag) { 1896 /* empty declaration */ 1897 error(0); 1898 } else if (!tflag) { 1899 /* empty declaration */ 1900 warning(0); 1901 } 1902 } 1903 ; 1904 1905 /* 1906 * On the top level, lint allows several forms of declarations that it doesn't 1907 * allow in functions. For example, a single ';' is an empty declaration and 1908 * is supported by some compilers, but in a function it would be an empty 1909 * statement, not a declaration. This makes a difference in C90 mode, where 1910 * a statement must not be followed by a declaration. 1911 * 1912 * See 'declaration' for all other declarations. 1913 */ 1914 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1915 begin_type end_type notype_init_declarators T_SEMI { 1916 if (sflag) { 1917 /* old style declaration; add 'int' */ 1918 error(1); 1919 } else if (!tflag) { 1920 /* old style declaration; add 'int' */ 1921 warning(1); 1922 } 1923 } 1924 | declaration 1925 | error T_SEMI { 1926 global_clean_up(); 1927 } 1928 | error T_RBRACE { 1929 global_clean_up(); 1930 } 1931 ; 1932 1933 function_definition: /* C99 6.9.1 */ 1934 func_declarator { 1935 if ($1->s_type->t_tspec != FUNC) { 1936 /* syntax error '%s' */ 1937 error(249, yytext); 1938 YYERROR; 1939 } 1940 if ($1->s_type->t_typedef) { 1941 /* ()-less function definition */ 1942 error(64); 1943 YYERROR; 1944 } 1945 funcdef($1); 1946 block_level++; 1947 begin_declaration_level(ARG); 1948 if (lwarn == LWARN_NONE) 1949 $1->s_used = true; 1950 } arg_declaration_list_opt { 1951 end_declaration_level(); 1952 block_level--; 1953 check_func_lint_directives(); 1954 check_func_old_style_arguments(); 1955 begin_control_statement(CS_FUNCTION_BODY); 1956 } compound_statement { 1957 funcend(); 1958 end_control_statement(CS_FUNCTION_BODY); 1959 } 1960 ; 1961 1962 func_declarator: 1963 begin_type end_type notype_declarator { 1964 /* ^^ There is no check for the missing type-specifier. */ 1965 $$ = $3; 1966 } 1967 | begin_type_declmods end_type notype_declarator { 1968 /* ^^ There is no check for the missing type-specifier. */ 1969 $$ = $3; 1970 } 1971 | begin_type_declaration_specifiers end_type type_declarator { 1972 $$ = $3; 1973 } 1974 ; 1975 1976 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1977 /* empty */ 1978 | arg_declaration_list 1979 ; 1980 1981 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 1982 arg_declaration 1983 | arg_declaration_list arg_declaration 1984 /* XXX or better "arg_declaration error" ? */ 1985 | error 1986 ; 1987 1988 /* 1989 * "arg_declaration" is separated from "declaration" because it 1990 * needs other error handling. 1991 */ 1992 arg_declaration: 1993 begin_type_declmods end_type T_SEMI { 1994 /* empty declaration */ 1995 warning(2); 1996 } 1997 | begin_type_declmods end_type notype_init_declarators T_SEMI 1998 | begin_type_declaration_specifiers end_type T_SEMI { 1999 if (!dcs->d_nonempty_decl) { 2000 /* empty declaration */ 2001 warning(2); 2002 } else { 2003 /* '%s' declared in argument declaration list */ 2004 warning(3, type_name(dcs->d_type)); 2005 } 2006 } 2007 | begin_type_declaration_specifiers end_type 2008 type_init_declarators T_SEMI { 2009 if (dcs->d_nonempty_decl) { 2010 /* '%s' declared in argument declaration list */ 2011 warning(3, type_name(dcs->d_type)); 2012 } 2013 } 2014 | begin_type_declmods error 2015 | begin_type_declaration_specifiers error 2016 ; 2017 2018 gcc_attribute_list_opt: 2019 /* empty */ 2020 | gcc_attribute_list 2021 ; 2022 2023 gcc_attribute_list: 2024 gcc_attribute 2025 | gcc_attribute_list gcc_attribute 2026 ; 2027 2028 gcc_attribute: 2029 T_ATTRIBUTE T_LPAREN T_LPAREN { 2030 attron = true; 2031 } gcc_attribute_spec_list { 2032 attron = false; 2033 } T_RPAREN T_RPAREN 2034 ; 2035 2036 gcc_attribute_spec_list: 2037 gcc_attribute_spec 2038 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2039 ; 2040 2041 gcc_attribute_spec: 2042 /* empty */ 2043 | T_AT_ALWAYS_INLINE 2044 | T_AT_ALIAS T_LPAREN string T_RPAREN 2045 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2046 | T_AT_ALIGNED 2047 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2048 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2049 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2050 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2051 | T_AT_COLD 2052 | T_AT_COMMON 2053 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2054 | T_AT_CONSTRUCTOR 2055 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2056 | T_AT_DEPRECATED 2057 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2058 | T_AT_DESTRUCTOR 2059 | T_AT_FALLTHROUGH { 2060 fallthru(1); 2061 } 2062 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2063 constant_expr T_COMMA constant_expr T_RPAREN 2064 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2065 | T_AT_GNU_INLINE 2066 | T_AT_HOT 2067 | T_AT_MALLOC 2068 | T_AT_MAY_ALIAS 2069 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2070 | T_AT_NOINLINE 2071 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2072 | T_AT_NONNULL 2073 | T_AT_NONSTRING 2074 | T_AT_NORETURN 2075 | T_AT_NOTHROW 2076 | T_AT_NO_INSTRUMENT_FUNCTION 2077 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2078 | T_AT_PACKED { 2079 addpacked(); 2080 } 2081 | T_AT_PCS T_LPAREN string T_RPAREN 2082 | T_AT_PURE 2083 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2084 | T_AT_RETURNS_NONNULL 2085 | T_AT_RETURNS_TWICE 2086 | T_AT_SECTION T_LPAREN string T_RPAREN 2087 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2088 | T_AT_SENTINEL 2089 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2090 | T_AT_TUNION 2091 | T_AT_UNUSED { 2092 add_attr_used(); 2093 } 2094 | T_AT_USED { 2095 add_attr_used(); 2096 } 2097 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2098 | T_AT_WARN_UNUSED_RESULT 2099 | T_AT_WEAK 2100 | T_QUAL { 2101 if ($1 != CONST) 2102 yyerror("Bad attribute"); 2103 } 2104 ; 2105 2106 gcc_attribute_bounded: 2107 T_AT_MINBYTES 2108 | T_AT_STRING 2109 | T_AT_BUFFER 2110 ; 2111 2112 gcc_attribute_format: 2113 T_AT_FORMAT_GNU_PRINTF 2114 | T_AT_FORMAT_PRINTF 2115 | T_AT_FORMAT_SCANF 2116 | T_AT_FORMAT_STRFMON 2117 | T_AT_FORMAT_STRFTIME 2118 | T_AT_FORMAT_SYSLOG 2119 ; 2120 2121 %% 2122 2123 /* ARGSUSED */ 2124 int 2125 yyerror(const char *msg) 2126 { 2127 /* syntax error '%s' */ 2128 error(249, yytext); 2129 if (++sytxerr >= 5) 2130 norecover(); 2131 return 0; 2132 } 2133 2134 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2135 || (defined(YYDEBUG) && defined(YYBISON)) 2136 static const char * 2137 cgram_to_string(int token, YYSTYPE val) 2138 { 2139 static const char *tqual_name[] = { 2140 "const", "volatile", "restrict", "_Thread_local" 2141 }; 2142 2143 switch (token) { 2144 case T_INCDEC: 2145 case T_MULTIPLICATIVE: 2146 case T_ADDITIVE: 2147 case T_SHIFT: 2148 case T_RELATIONAL: 2149 case T_EQUALITY: 2150 case T_OPASSIGN: 2151 return modtab[val.y_op].m_name; 2152 case T_SCLASS: 2153 return scl_name(val.y_scl); 2154 case T_TYPE: 2155 case T_STRUCT_OR_UNION: 2156 return tspec_name(val.y_tspec); 2157 case T_QUAL: 2158 return tqual_name[val.y_tqual]; 2159 case T_NAME: 2160 return val.y_name->sb_name; 2161 default: 2162 return "<none>"; 2163 } 2164 } 2165 #endif 2166 2167 #if defined(YYDEBUG) && defined(YYBISON) 2168 static void 2169 cgram_print(FILE *output, int token, YYSTYPE val) 2170 { 2171 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2172 } 2173 #endif 2174 2175 static void 2176 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2177 { 2178 declare(decl, initflg, renaming); 2179 if (renaming != NULL) 2180 freeyyv(&renaming, T_NAME); 2181 } 2182 2183 /* 2184 * Discard all input tokens up to and including the next 2185 * unmatched right paren 2186 */ 2187 static void 2188 read_until_rparen(void) 2189 { 2190 int level; 2191 2192 if (yychar < 0) 2193 yychar = yylex(); 2194 freeyyv(&yylval, yychar); 2195 2196 level = 1; 2197 while (yychar != T_RPAREN || --level > 0) { 2198 if (yychar == T_LPAREN) { 2199 level++; 2200 } else if (yychar <= 0) { 2201 break; 2202 } 2203 freeyyv(&yylval, yychar = yylex()); 2204 } 2205 2206 yyclearin; 2207 } 2208 2209 static sym_t * 2210 symbolrename(sym_t *s, sbuf_t *sb) 2211 { 2212 if (sb != NULL) 2213 s->s_rename = sb->sb_name; 2214 return s; 2215 } 2216
Indexes created Fri Oct 03 02:09:57 GMT 2025