cgram.y revision 1.355
1 %{ 2 /* $NetBSD: cgram.y,v 1.355 2021/08/11 05:19:32 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 1.355 2021/08/11 05:19:32 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_RETURNS_TWICE 252 %token T_AT_SECTION 253 %token T_AT_SENTINEL 254 %token T_AT_STRING 255 %token T_AT_TLS_MODEL 256 %token T_AT_TUNION 257 %token T_AT_UNUSED 258 %token T_AT_USED 259 %token T_AT_VISIBILITY 260 %token T_AT_WARN_UNUSED_RESULT 261 %token T_AT_WEAK 262 263 %left T_THEN 264 %left T_ELSE 265 %right T_QUEST T_COLON 266 %left T_LOGOR 267 %left T_LOGAND 268 %left T_BITOR 269 %left T_BITXOR 270 %left T_AMPER 271 %left T_EQUALITY 272 %left T_RELATIONAL 273 %left T_SHIFT 274 %left T_ADDITIVE 275 %left T_ASTERISK T_MULTIPLICATIVE 276 277 %token <y_name> T_NAME 278 %token <y_name> T_TYPENAME 279 %token <y_val> T_CON 280 %token <y_string> T_STRING 281 282 %type <y_sym> identifier_sym 283 %type <y_name> identifier 284 %type <y_string> string 285 %type <y_string> string2 286 287 %type <y_tnode> primary_expression 288 %type <y_tnode> generic_selection 289 %type <y_generic> generic_assoc_list 290 %type <y_generic> generic_association 291 %type <y_tnode> postfix_expression 292 %type <y_tnode> gcc_statement_expr_list 293 %type <y_tnode> gcc_statement_expr_item 294 %type <y_op> point_or_arrow 295 %type <y_tnode> argument_expression_list 296 %type <y_tnode> unary_expression 297 %type <y_tnode> cast_expression 298 %type <y_tnode> conditional_expression 299 %type <y_tnode> assignment_expression 300 %type <y_tnode> expression_opt 301 %type <y_tnode> expression 302 %type <y_tnode> constant_expr 303 304 %type <y_type> begin_type_typespec 305 %type <y_type> type_specifier 306 %type <y_type> notype_type_specifier 307 %type <y_type> struct_or_union_specifier 308 %type <y_tspec> struct_or_union 309 %type <y_sym> braced_struct_declaration_list 310 %type <y_sym> struct_declaration_list_with_rbrace 311 %type <y_sym> struct_declaration_list 312 %type <y_sym> struct_declaration 313 %type <y_sym> notype_struct_declarators 314 %type <y_sym> type_struct_declarators 315 %type <y_sym> notype_struct_declarator 316 %type <y_sym> type_struct_declarator 317 %type <y_type> enum_specifier 318 %type <y_sym> enum_declaration 319 %type <y_sym> enums_with_opt_comma 320 %type <y_sym> enumerator_list 321 %type <y_sym> enumerator 322 %type <y_qual_ptr> type_qualifier 323 %type <y_qual_ptr> pointer 324 %type <y_qual_ptr> asterisk 325 %type <y_qual_ptr> type_qualifier_list_opt 326 %type <y_qual_ptr> type_qualifier_list 327 %type <y_sym> notype_declarator 328 %type <y_sym> type_declarator 329 %type <y_sym> notype_direct_declarator 330 %type <y_sym> type_direct_declarator 331 %type <y_sym> type_param_declarator 332 %type <y_sym> notype_param_declarator 333 %type <y_sym> direct_param_declarator 334 %type <y_sym> direct_notype_param_declarator 335 %type <y_sym> param_list 336 %type <y_tnode> array_size 337 %type <y_sym> identifier_list 338 %type <y_type> type_name 339 %type <y_sym> abstract_declaration 340 %type <y_sym> abstract_declarator 341 %type <y_sym> direct_abstract_declarator 342 %type <y_sym> abstract_decl_param_list 343 %type <y_sym> vararg_parameter_type_list 344 %type <y_sym> parameter_type_list 345 %type <y_sym> parameter_declaration 346 %type <y_range> range 347 %type <y_name> asm_or_symbolrename_opt 348 349 %type <y_seen_statement> block_item_list 350 %type <y_seen_statement> block_item 351 %type <y_tnode> do_while_expr 352 %type <y_sym> func_declarator 353 354 %{ 355 #if defined(YYDEBUG) && defined(YYBISON) 356 static void cgram_print(FILE *, int, YYSTYPE); 357 #endif 358 %} 359 360 %% 361 362 program: 363 /* empty */ { 364 if (sflag) { 365 /* empty translation unit */ 366 error(272); 367 } else if (!tflag) { 368 /* empty translation unit */ 369 warning(272); 370 } 371 } 372 | translation_unit 373 ; 374 375 identifier_sym: /* helper for struct/union/enum */ 376 identifier { 377 $$ = getsym($1); 378 } 379 ; 380 381 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 382 identifier: 383 T_NAME { 384 debug_printf("cgram: name '%s'", $1->sb_name); 385 $$ = $1; 386 } 387 | T_TYPENAME { 388 debug_printf("cgram: typename '%s'", $1->sb_name); 389 $$ = $1; 390 } 391 ; 392 393 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 394 string: 395 T_STRING 396 | T_STRING string2 { 397 $$ = cat_strings($1, $2); 398 } 399 ; 400 401 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 402 string2: 403 T_STRING { 404 if (tflag) { 405 /* concatenated strings are illegal in traditional C */ 406 warning(219); 407 } 408 $$ = $1; 409 } 410 | string2 T_STRING { 411 $$ = cat_strings($1, $2); 412 } 413 ; 414 415 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 416 primary_expression: 417 T_NAME { 418 /* XXX really necessary? */ 419 if (yychar < 0) 420 yychar = yylex(); 421 $$ = build_name(getsym($1), yychar); 422 } 423 | T_CON { 424 $$ = build_constant(gettyp($1->v_tspec), $1); 425 } 426 | string { 427 $$ = build_string($1); 428 } 429 | T_LPAREN expression T_RPAREN { 430 if ($2 != NULL) 431 $2->tn_parenthesized = true; 432 $$ = $2; 433 } 434 | generic_selection 435 /* GCC primary-expression, see c_parser_postfix_expression */ 436 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 437 symtyp = FMEMBER; 438 $$ = build_offsetof($3, getsym($5)); 439 } 440 ; 441 442 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 443 generic_selection: 444 T_GENERIC T_LPAREN assignment_expression T_COMMA 445 generic_assoc_list T_RPAREN { 446 /* generic selection requires C11 or later */ 447 c11ism(345); 448 $$ = build_generic_selection($3, $5); 449 } 450 ; 451 452 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 453 generic_assoc_list: 454 generic_association 455 | generic_assoc_list T_COMMA generic_association { 456 $3->ga_prev = $1; 457 $$ = $3; 458 } 459 ; 460 461 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 462 generic_association: 463 type_name T_COLON assignment_expression { 464 $$ = getblk(sizeof(*$$)); 465 $$->ga_arg = $1; 466 $$->ga_result = $3; 467 } 468 | T_DEFAULT T_COLON assignment_expression { 469 $$ = getblk(sizeof(*$$)); 470 $$->ga_arg = NULL; 471 $$->ga_result = $3; 472 } 473 ; 474 475 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 476 postfix_expression: 477 primary_expression 478 | postfix_expression T_LBRACK expression T_RBRACK { 479 $$ = build_unary(INDIR, build_binary($1, PLUS, $3)); 480 } 481 | postfix_expression T_LPAREN T_RPAREN { 482 $$ = build_function_call($1, NULL); 483 } 484 | postfix_expression T_LPAREN argument_expression_list T_RPAREN { 485 $$ = build_function_call($1, $3); 486 } 487 | postfix_expression point_or_arrow T_NAME { 488 $$ = build_member_access($1, $2, $3); 489 } 490 | postfix_expression T_INCDEC { 491 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $1); 492 } 493 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 494 sym_t *tmp = mktempsym($2); 495 begin_initialization(tmp); 496 cgram_declare(tmp, true, NULL); 497 } init_lbrace initializer_list comma_opt init_rbrace { 498 if (!Sflag) 499 /* compound literals are a C9X/GCC extension */ 500 gnuism(319); 501 $$ = build_name(*current_initsym(), 0); 502 end_initialization(); 503 } 504 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 505 block_level--; 506 mem_block_level--; 507 begin_initialization(mktempsym(dup_type($3->tn_type))); 508 mem_block_level++; 509 block_level++; 510 /* ({ }) is a GCC extension */ 511 gnuism(320); 512 } compound_statement_rbrace T_RPAREN { 513 $$ = build_name(*current_initsym(), 0); 514 end_initialization(); 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 $$ = expr_zalloc_tnode(); 542 $$->tn_type = gettyp(VOID); 543 } 544 | expression T_SEMI { 545 if ($1 == NULL) { /* in case of syntax errors */ 546 $$ = expr_zalloc_tnode(); 547 $$->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 $$ = build_function_argument($1, $3); 577 } 578 ; 579 580 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 581 unary_expression: 582 postfix_expression 583 | T_INCDEC unary_expression { 584 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2); 585 } 586 | T_AMPER cast_expression { 587 $$ = build_unary(ADDR, $2); 588 } 589 | T_ASTERISK cast_expression { 590 $$ = build_unary(INDIR, $2); 591 } 592 | T_ADDITIVE cast_expression { 593 if (tflag && $1 == PLUS) { 594 /* unary + is illegal in traditional C */ 595 warning(100); 596 } 597 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2); 598 } 599 | T_COMPLEMENT cast_expression { 600 $$ = build_unary(COMPL, $2); 601 } 602 | T_LOGNOT cast_expression { 603 $$ = build_unary(NOT, $2); 604 } 605 | T_REAL cast_expression { /* GCC c_parser_unary_expression */ 606 $$ = build_unary(REAL, $2); 607 } 608 | T_IMAG cast_expression { /* GCC c_parser_unary_expression */ 609 $$ = build_unary(IMAG, $2); 610 } 611 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 612 $$ = $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 conditional_expression { 661 $$ = build_binary($1, MULT, $3); 662 } 663 | conditional_expression T_MULTIPLICATIVE conditional_expression { 664 $$ = build_binary($1, $2, $3); 665 } 666 | conditional_expression T_ADDITIVE conditional_expression { 667 $$ = build_binary($1, $2, $3); 668 } 669 | conditional_expression T_SHIFT conditional_expression { 670 $$ = build_binary($1, $2, $3); 671 } 672 | conditional_expression T_RELATIONAL conditional_expression { 673 $$ = build_binary($1, $2, $3); 674 } 675 | conditional_expression T_EQUALITY conditional_expression { 676 $$ = build_binary($1, $2, $3); 677 } 678 | conditional_expression T_AMPER conditional_expression { 679 $$ = build_binary($1, BITAND, $3); 680 } 681 | conditional_expression T_BITXOR conditional_expression { 682 $$ = build_binary($1, BITXOR, $3); 683 } 684 | conditional_expression T_BITOR conditional_expression { 685 $$ = build_binary($1, BITOR, $3); 686 } 687 | conditional_expression T_LOGAND conditional_expression { 688 $$ = build_binary($1, LOGAND, $3); 689 } 690 | conditional_expression T_LOGOR conditional_expression { 691 $$ = build_binary($1, LOGOR, $3); 692 } 693 | conditional_expression T_QUEST expression 694 T_COLON conditional_expression { 695 $$ = build_binary($1, QUEST, build_binary($3, COLON, $5)); 696 } 697 ; 698 699 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 700 assignment_expression: 701 conditional_expression 702 | unary_expression T_ASSIGN assignment_expression { 703 $$ = build_binary($1, ASSIGN, $3); 704 } 705 | unary_expression T_OPASSIGN assignment_expression { 706 $$ = build_binary($1, $2, $3); 707 } 708 ; 709 710 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 711 expression: 712 assignment_expression 713 | expression T_COMMA assignment_expression { 714 $$ = build_binary($1, COMMA, $3); 715 } 716 ; 717 718 constant_expr_list_opt: /* helper for gcc_attribute */ 719 /* empty */ 720 | constant_expr_list 721 ; 722 723 constant_expr_list: /* helper for gcc_attribute */ 724 constant_expr 725 | constant_expr_list T_COMMA constant_expr 726 ; 727 728 constant_expr: /* C99 6.6 */ 729 conditional_expression 730 ; 731 732 declaration_or_error: 733 declaration 734 | error T_SEMI 735 ; 736 737 declaration: /* C99 6.7 */ 738 begin_type_declmods end_type T_SEMI { 739 if (dcs->d_scl == TYPEDEF) { 740 /* typedef declares no type name */ 741 warning(72); 742 } else { 743 /* empty declaration */ 744 warning(2); 745 } 746 } 747 | begin_type_declmods end_type notype_init_declarators T_SEMI 748 /* ^^ There is no check for the missing type-specifier. */ 749 | begin_type_declaration_specifiers end_type T_SEMI { 750 if (dcs->d_scl == TYPEDEF) { 751 /* typedef declares no type name */ 752 warning(72); 753 } else if (!dcs->d_nonempty_decl) { 754 /* empty declaration */ 755 warning(2); 756 } 757 } 758 | begin_type_declaration_specifiers end_type 759 type_init_declarators T_SEMI 760 ; 761 762 begin_type_declaration_specifiers: /* see C99 6.7 */ 763 begin_type_typespec { 764 add_type($1); 765 } 766 | begin_type_declmods type_specifier { 767 add_type($2); 768 } 769 | type_attribute begin_type_declaration_specifiers 770 | begin_type_declaration_specifiers declmod 771 | begin_type_declaration_specifiers notype_type_specifier { 772 add_type($2); 773 } 774 ; 775 776 begin_type_declmods: /* see C99 6.7 */ 777 begin_type T_QUAL { 778 add_qualifier($2); 779 } 780 | begin_type T_SCLASS { 781 add_storage_class($2); 782 } 783 | begin_type_declmods declmod 784 ; 785 786 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 787 begin_type_specifier_qualifier_list_postfix 788 | type_attribute_list begin_type_specifier_qualifier_list_postfix 789 ; 790 791 begin_type_specifier_qualifier_list_postfix: 792 begin_type_typespec { 793 add_type($1); 794 } 795 | begin_type_qualifier_list type_specifier { 796 add_type($2); 797 } 798 | begin_type_specifier_qualifier_list_postfix T_QUAL { 799 add_qualifier($2); 800 } 801 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 802 add_type($2); 803 } 804 | begin_type_specifier_qualifier_list_postfix type_attribute 805 ; 806 807 begin_type_typespec: 808 begin_type notype_type_specifier { 809 $$ = $2; 810 } 811 | T_TYPENAME begin_type { 812 $$ = getsym($1)->s_type; 813 } 814 ; 815 816 begin_type_qualifier_list: 817 begin_type T_QUAL { 818 add_qualifier($2); 819 } 820 | begin_type_qualifier_list T_QUAL { 821 add_qualifier($2); 822 } 823 ; 824 825 declmod: 826 T_QUAL { 827 add_qualifier($1); 828 } 829 | T_SCLASS { 830 add_storage_class($1); 831 } 832 | type_attribute_list 833 ; 834 835 type_attribute_list: 836 type_attribute 837 | type_attribute_list type_attribute 838 ; 839 840 type_attribute_opt: 841 /* empty */ 842 | type_attribute 843 ; 844 845 type_attribute: /* See C11 6.7 declaration-specifiers */ 846 gcc_attribute 847 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 848 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 849 | T_PACKED { 850 addpacked(); 851 } 852 | T_NORETURN 853 ; 854 855 begin_type: 856 /* empty */ { 857 begin_type(); 858 } 859 ; 860 861 end_type: 862 /* empty */ { 863 end_type(); 864 } 865 ; 866 867 type_specifier: /* C99 6.7.2 */ 868 notype_type_specifier 869 | T_TYPENAME { 870 $$ = getsym($1)->s_type; 871 } 872 ; 873 874 notype_type_specifier: /* see C99 6.7.2 */ 875 T_TYPE { 876 $$ = gettyp($1); 877 } 878 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 879 $$ = $3->tn_type; 880 } 881 | struct_or_union_specifier { 882 end_declaration_level(); 883 $$ = $1; 884 } 885 | enum_specifier { 886 end_declaration_level(); 887 $$ = $1; 888 } 889 ; 890 891 struct_or_union_specifier: /* C99 6.7.2.1 */ 892 struct_or_union identifier_sym { 893 /* 894 * STDC requires that "struct a;" always introduces 895 * a new tag if "a" is not declared at current level 896 * 897 * yychar is valid because otherwise the parser would not 898 * have been able to decide if it must shift or reduce 899 */ 900 $$ = mktag($2, $1, false, yychar == T_SEMI); 901 } 902 | struct_or_union identifier_sym { 903 dcs->d_tagtyp = mktag($2, $1, true, false); 904 } braced_struct_declaration_list { 905 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 906 } 907 | struct_or_union { 908 dcs->d_tagtyp = mktag(NULL, $1, true, false); 909 } braced_struct_declaration_list { 910 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 911 } 912 | struct_or_union error { 913 symtyp = FVFT; 914 $$ = gettyp(INT); 915 } 916 ; 917 918 struct_or_union: /* C99 6.7.2.1 */ 919 T_STRUCT_OR_UNION { 920 symtyp = FTAG; 921 begin_declaration_level($1 == STRUCT ? MOS : MOU); 922 dcs->d_offset = 0; 923 dcs->d_sou_align_in_bits = CHAR_SIZE; 924 $$ = $1; 925 } 926 | struct_or_union type_attribute 927 ; 928 929 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 930 struct_declaration_lbrace struct_declaration_list_with_rbrace { 931 $$ = $2; 932 } 933 ; 934 935 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 936 T_LBRACE { 937 symtyp = FVFT; 938 } 939 ; 940 941 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 942 struct_declaration_list T_RBRACE 943 | T_RBRACE { 944 /* XXX: This is not allowed by any C standard. */ 945 $$ = NULL; 946 } 947 ; 948 949 struct_declaration_list: /* C99 6.7.2.1 */ 950 struct_declaration 951 | struct_declaration_list struct_declaration { 952 $$ = lnklst($1, $2); 953 } 954 ; 955 956 struct_declaration: /* C99 6.7.2.1 */ 957 begin_type_qualifier_list end_type { 958 /* ^^ There is no check for the missing type-specifier. */ 959 /* too late, i know, but getsym() compensates it */ 960 symtyp = FMEMBER; 961 } notype_struct_declarators type_attribute_opt T_SEMI { 962 symtyp = FVFT; 963 $$ = $4; 964 } 965 | begin_type_specifier_qualifier_list end_type { 966 symtyp = FMEMBER; 967 } type_struct_declarators type_attribute_opt T_SEMI { 968 symtyp = FVFT; 969 $$ = $4; 970 } 971 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 972 /* syntax error '%s' */ 973 error(249, "member without type"); 974 $$ = NULL; 975 } 976 | begin_type_specifier_qualifier_list end_type type_attribute_opt 977 T_SEMI { 978 symtyp = FVFT; 979 if (!Sflag) 980 /* anonymous struct/union members is a C9X feature */ 981 warning(49); 982 if (is_struct_or_union(dcs->d_type->t_tspec)) { 983 $$ = dcs->d_type->t_str->sou_first_member; 984 /* add all the members of the anonymous struct/union */ 985 anonymize($$); 986 } else { 987 /* syntax error '%s' */ 988 error(249, "unnamed member"); 989 $$ = NULL; 990 } 991 } 992 | error T_SEMI { 993 symtyp = FVFT; 994 $$ = NULL; 995 } 996 ; 997 998 notype_struct_declarators: 999 notype_struct_declarator { 1000 $$ = declarator_1_struct_union($1); 1001 } 1002 | notype_struct_declarators { 1003 symtyp = FMEMBER; 1004 } T_COMMA type_struct_declarator { 1005 $$ = lnklst($1, declarator_1_struct_union($4)); 1006 } 1007 ; 1008 1009 type_struct_declarators: 1010 type_struct_declarator { 1011 $$ = declarator_1_struct_union($1); 1012 } 1013 | type_struct_declarators { 1014 symtyp = FMEMBER; 1015 } T_COMMA type_struct_declarator { 1016 $$ = lnklst($1, declarator_1_struct_union($4)); 1017 } 1018 ; 1019 1020 notype_struct_declarator: 1021 notype_declarator 1022 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1023 $$ = bitfield($1, to_int_constant($3, true)); 1024 } 1025 | { 1026 symtyp = FVFT; 1027 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1028 $$ = bitfield(NULL, to_int_constant($3, true)); 1029 } 1030 ; 1031 1032 type_struct_declarator: 1033 type_declarator 1034 | type_declarator T_COLON constant_expr { 1035 $$ = bitfield($1, to_int_constant($3, true)); 1036 } 1037 | { 1038 symtyp = FVFT; 1039 } T_COLON constant_expr { 1040 $$ = bitfield(NULL, to_int_constant($3, true)); 1041 } 1042 ; 1043 1044 enum_specifier: /* C99 6.7.2.2 */ 1045 enum gcc_attribute_list_opt identifier_sym { 1046 $$ = mktag($3, ENUM, false, false); 1047 } 1048 | enum gcc_attribute_list_opt identifier_sym { 1049 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1050 } enum_declaration /*gcc_attribute_list_opt*/ { 1051 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1052 } 1053 | enum gcc_attribute_list_opt { 1054 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1055 } enum_declaration /*gcc_attribute_list_opt*/ { 1056 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1057 } 1058 | enum error { 1059 symtyp = FVFT; 1060 $$ = gettyp(INT); 1061 } 1062 ; 1063 1064 enum: /* helper for C99 6.7.2.2 */ 1065 T_ENUM { 1066 symtyp = FTAG; 1067 begin_declaration_level(CTCONST); 1068 } 1069 ; 1070 1071 enum_declaration: /* helper for C99 6.7.2.2 */ 1072 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1073 $$ = $2; 1074 } 1075 ; 1076 1077 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1078 T_LBRACE { 1079 symtyp = FVFT; 1080 enumval = 0; 1081 } 1082 ; 1083 1084 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1085 enumerator_list 1086 | enumerator_list T_COMMA { 1087 if (sflag) { 1088 /* trailing ',' prohibited in enum declaration */ 1089 error(54); 1090 } else { 1091 /* trailing ',' prohibited in enum declaration */ 1092 c99ism(54); 1093 } 1094 $$ = $1; 1095 } 1096 ; 1097 1098 enumerator_list: /* C99 6.7.2.2 */ 1099 enumerator 1100 | enumerator_list T_COMMA enumerator { 1101 $$ = lnklst($1, $3); 1102 } 1103 | error { 1104 $$ = NULL; 1105 } 1106 ; 1107 1108 enumerator: /* C99 6.7.2.2 */ 1109 identifier_sym gcc_attribute_list_opt { 1110 $$ = enumeration_constant($1, enumval, true); 1111 } 1112 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1113 $$ = enumeration_constant($1, to_int_constant($4, true), 1114 false); 1115 } 1116 ; 1117 1118 type_qualifier: /* C99 6.7.3 */ 1119 T_QUAL { 1120 $$ = xcalloc(1, sizeof(*$$)); 1121 if ($1 == CONST) 1122 $$->p_const = true; 1123 if ($1 == VOLATILE) 1124 $$->p_volatile = true; 1125 } 1126 ; 1127 1128 pointer: /* C99 6.7.5 */ 1129 asterisk type_qualifier_list_opt { 1130 $$ = merge_qualified_pointer($1, $2); 1131 } 1132 | asterisk type_qualifier_list_opt pointer { 1133 $$ = merge_qualified_pointer($1, $2); 1134 $$ = merge_qualified_pointer($$, $3); 1135 } 1136 ; 1137 1138 asterisk: /* helper for 'pointer' */ 1139 T_ASTERISK { 1140 $$ = xcalloc(1, sizeof(*$$)); 1141 $$->p_pointer = true; 1142 } 1143 ; 1144 1145 type_qualifier_list_opt: /* see C99 6.7.5 */ 1146 /* empty */ { 1147 $$ = NULL; 1148 } 1149 | type_qualifier_list 1150 ; 1151 1152 type_qualifier_list: /* C99 6.7.5 */ 1153 type_qualifier 1154 | type_qualifier_list type_qualifier { 1155 $$ = merge_qualified_pointer($1, $2); 1156 } 1157 ; 1158 1159 /* 1160 * For an explanation of 'notype' in the following rules, see 1161 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1162 */ 1163 1164 notype_init_declarators: 1165 notype_init_declarator 1166 | notype_init_declarators T_COMMA type_init_declarator 1167 ; 1168 1169 type_init_declarators: 1170 type_init_declarator 1171 | type_init_declarators T_COMMA type_init_declarator 1172 ; 1173 1174 notype_init_declarator: 1175 notype_declarator asm_or_symbolrename_opt { 1176 cgram_declare($1, false, $2); 1177 check_size($1); 1178 } 1179 | notype_declarator asm_or_symbolrename_opt { 1180 begin_initialization($1); 1181 cgram_declare($1, true, $2); 1182 } T_ASSIGN initializer { 1183 check_size($1); 1184 end_initialization(); 1185 } 1186 ; 1187 1188 type_init_declarator: 1189 type_declarator asm_or_symbolrename_opt { 1190 cgram_declare($1, false, $2); 1191 check_size($1); 1192 } 1193 | type_declarator asm_or_symbolrename_opt { 1194 begin_initialization($1); 1195 cgram_declare($1, true, $2); 1196 } T_ASSIGN initializer { 1197 check_size($1); 1198 end_initialization(); 1199 } 1200 ; 1201 1202 notype_declarator: 1203 notype_direct_declarator 1204 | pointer notype_direct_declarator { 1205 $$ = add_pointer($2, $1); 1206 } 1207 ; 1208 1209 type_declarator: 1210 type_direct_declarator 1211 | pointer type_direct_declarator { 1212 $$ = add_pointer($2, $1); 1213 } 1214 ; 1215 1216 notype_direct_declarator: 1217 T_NAME { 1218 $$ = declarator_name(getsym($1)); 1219 } 1220 | T_LPAREN type_declarator T_RPAREN { 1221 $$ = $2; 1222 } 1223 | type_attribute notype_direct_declarator { 1224 $$ = $2; 1225 } 1226 | notype_direct_declarator T_LBRACK T_RBRACK { 1227 $$ = add_array($1, false, 0); 1228 } 1229 | notype_direct_declarator T_LBRACK array_size T_RBRACK { 1230 $$ = add_array($1, true, to_int_constant($3, false)); 1231 } 1232 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1233 $$ = add_function(symbolrename($1, $3), $2); 1234 end_declaration_level(); 1235 block_level--; 1236 } 1237 | notype_direct_declarator type_attribute 1238 ; 1239 1240 type_direct_declarator: 1241 identifier { 1242 $$ = declarator_name(getsym($1)); 1243 } 1244 | T_LPAREN type_declarator T_RPAREN { 1245 $$ = $2; 1246 } 1247 | type_attribute type_direct_declarator { 1248 $$ = $2; 1249 } 1250 | type_direct_declarator T_LBRACK T_RBRACK { 1251 $$ = add_array($1, false, 0); 1252 } 1253 | type_direct_declarator T_LBRACK array_size T_RBRACK { 1254 $$ = add_array($1, true, to_int_constant($3, false)); 1255 } 1256 | type_direct_declarator param_list asm_or_symbolrename_opt { 1257 $$ = add_function(symbolrename($1, $3), $2); 1258 end_declaration_level(); 1259 block_level--; 1260 } 1261 | type_direct_declarator type_attribute 1262 ; 1263 1264 /* 1265 * The two distinct rules type_param_declarator and notype_param_declarator 1266 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1267 * always treated as a typename, not an argument name. For example, after 1268 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1269 * "f(int (double));", not "f(int a);". 1270 */ 1271 type_param_declarator: 1272 direct_param_declarator 1273 | pointer direct_param_declarator { 1274 $$ = add_pointer($2, $1); 1275 } 1276 ; 1277 1278 notype_param_declarator: 1279 direct_notype_param_declarator 1280 | pointer direct_notype_param_declarator { 1281 $$ = add_pointer($2, $1); 1282 } 1283 ; 1284 1285 direct_param_declarator: 1286 identifier type_attribute_list { 1287 $$ = declarator_name(getsym($1)); 1288 } 1289 | identifier { 1290 $$ = declarator_name(getsym($1)); 1291 } 1292 | T_LPAREN notype_param_declarator T_RPAREN { 1293 $$ = $2; 1294 } 1295 | direct_param_declarator T_LBRACK T_RBRACK gcc_attribute_list_opt { 1296 $$ = add_array($1, false, 0); 1297 } 1298 | direct_param_declarator T_LBRACK array_size T_RBRACK 1299 gcc_attribute_list_opt { 1300 $$ = add_array($1, true, to_int_constant($3, false)); 1301 } 1302 | direct_param_declarator param_list asm_or_symbolrename_opt { 1303 $$ = add_function(symbolrename($1, $3), $2); 1304 end_declaration_level(); 1305 block_level--; 1306 } 1307 ; 1308 1309 direct_notype_param_declarator: 1310 identifier { 1311 $$ = declarator_name(getsym($1)); 1312 } 1313 | T_LPAREN notype_param_declarator T_RPAREN { 1314 $$ = $2; 1315 } 1316 | direct_notype_param_declarator T_LBRACK T_RBRACK { 1317 $$ = add_array($1, false, 0); 1318 } 1319 | direct_notype_param_declarator T_LBRACK array_size T_RBRACK { 1320 $$ = add_array($1, true, to_int_constant($3, false)); 1321 } 1322 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1323 $$ = add_function(symbolrename($1, $3), $2); 1324 end_declaration_level(); 1325 block_level--; 1326 } 1327 ; 1328 1329 param_list: 1330 id_list_lparen identifier_list T_RPAREN { 1331 $$ = $2; 1332 } 1333 | abstract_decl_param_list 1334 ; 1335 1336 id_list_lparen: 1337 T_LPAREN { 1338 block_level++; 1339 begin_declaration_level(PROTO_ARG); 1340 } 1341 ; 1342 1343 array_size: 1344 type_qualifier_list_opt T_SCLASS constant_expr { 1345 /* C11 6.7.6.3p7 */ 1346 if ($2 != STATIC) 1347 yyerror("Bad attribute"); 1348 /* static array size is a C11 extension */ 1349 c11ism(343); 1350 $$ = $3; 1351 } 1352 | constant_expr 1353 ; 1354 1355 identifier_list: /* C99 6.7.5 */ 1356 T_NAME { 1357 $$ = old_style_function_name(getsym($1)); 1358 } 1359 | identifier_list T_COMMA T_NAME { 1360 $$ = lnklst($1, old_style_function_name(getsym($3))); 1361 } 1362 | identifier_list error 1363 ; 1364 1365 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1366 type_name: /* C99 6.7.6 */ 1367 { 1368 begin_declaration_level(ABSTRACT); 1369 } abstract_declaration { 1370 end_declaration_level(); 1371 $$ = $2->s_type; 1372 } 1373 ; 1374 1375 abstract_declaration: /* specific to lint */ 1376 begin_type_qualifier_list end_type { 1377 $$ = declare_1_abstract(abstract_name()); 1378 } 1379 | begin_type_specifier_qualifier_list end_type { 1380 $$ = declare_1_abstract(abstract_name()); 1381 } 1382 | begin_type_qualifier_list end_type abstract_declarator { 1383 $$ = declare_1_abstract($3); 1384 } 1385 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1386 $$ = declare_1_abstract($3); 1387 } 1388 ; 1389 1390 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1391 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1392 abstract_declarator: 1393 pointer { 1394 $$ = add_pointer(abstract_name(), $1); 1395 } 1396 | direct_abstract_declarator 1397 | pointer direct_abstract_declarator { 1398 $$ = add_pointer($2, $1); 1399 } 1400 ; 1401 1402 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1403 direct_abstract_declarator: 1404 T_LPAREN abstract_declarator T_RPAREN { 1405 $$ = $2; 1406 } 1407 | T_LBRACK T_RBRACK { 1408 $$ = add_array(abstract_name(), false, 0); 1409 } 1410 | T_LBRACK array_size T_RBRACK { 1411 $$ = add_array(abstract_name(), true, 1412 to_int_constant($2, false)); 1413 } 1414 | type_attribute direct_abstract_declarator { 1415 $$ = $2; 1416 } 1417 | direct_abstract_declarator T_LBRACK T_RBRACK { 1418 $$ = add_array($1, false, 0); 1419 } 1420 | direct_abstract_declarator T_LBRACK T_ASTERISK T_RBRACK { /* C99 */ 1421 $$ = add_array($1, false, 0); 1422 } 1423 | direct_abstract_declarator T_LBRACK array_size T_RBRACK { 1424 $$ = add_array($1, true, to_int_constant($3, false)); 1425 } 1426 | abstract_decl_param_list asm_or_symbolrename_opt { 1427 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1428 end_declaration_level(); 1429 block_level--; 1430 } 1431 | direct_abstract_declarator abstract_decl_param_list 1432 asm_or_symbolrename_opt { 1433 $$ = add_function(symbolrename($1, $3), $2); 1434 end_declaration_level(); 1435 block_level--; 1436 } 1437 | direct_abstract_declarator type_attribute_list 1438 ; 1439 1440 abstract_decl_param_list: /* specific to lint */ 1441 abstract_decl_lparen T_RPAREN type_attribute_opt { 1442 $$ = NULL; 1443 } 1444 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1445 type_attribute_opt { 1446 dcs->d_proto = true; 1447 $$ = $2; 1448 } 1449 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1450 $$ = NULL; 1451 } 1452 ; 1453 1454 abstract_decl_lparen: /* specific to lint */ 1455 T_LPAREN { 1456 block_level++; 1457 begin_declaration_level(PROTO_ARG); 1458 } 1459 ; 1460 1461 vararg_parameter_type_list: /* specific to lint */ 1462 parameter_type_list 1463 | parameter_type_list T_COMMA T_ELLIPSIS { 1464 dcs->d_vararg = true; 1465 $$ = $1; 1466 } 1467 | T_ELLIPSIS { 1468 if (sflag) { 1469 /* ANSI C requires formal parameter before '...' */ 1470 error(84); 1471 } else if (!tflag) { 1472 /* ANSI C requires formal parameter before '...' */ 1473 warning(84); 1474 } 1475 dcs->d_vararg = true; 1476 $$ = NULL; 1477 } 1478 ; 1479 1480 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1481 parameter_type_list: 1482 parameter_declaration 1483 | parameter_type_list T_COMMA parameter_declaration { 1484 $$ = lnklst($1, $3); 1485 } 1486 ; 1487 1488 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1489 parameter_declaration: 1490 begin_type_declmods end_type { 1491 /* ^^ There is no check for the missing type-specifier. */ 1492 $$ = declare_argument(abstract_name(), false); 1493 } 1494 | begin_type_declaration_specifiers end_type { 1495 $$ = declare_argument(abstract_name(), false); 1496 } 1497 | begin_type_declmods end_type notype_param_declarator { 1498 /* ^^ There is no check for the missing type-specifier. */ 1499 $$ = declare_argument($3, false); 1500 } 1501 /* 1502 * type_param_declarator is needed because of following conflict: 1503 * "typedef int a; f(int (a));" could be parsed as 1504 * "function with argument a of type int", or 1505 * "function with an abstract argument of type function". 1506 * This grammar realizes the second case. 1507 */ 1508 | begin_type_declaration_specifiers end_type type_param_declarator { 1509 $$ = declare_argument($3, false); 1510 } 1511 | begin_type_declmods end_type abstract_declarator { 1512 /* ^^ There is no check for the missing type-specifier. */ 1513 $$ = declare_argument($3, false); 1514 } 1515 | begin_type_declaration_specifiers end_type abstract_declarator { 1516 $$ = declare_argument($3, false); 1517 } 1518 ; 1519 1520 initializer: /* C99 6.7.8 "Initialization" */ 1521 assignment_expression { 1522 init_expr($1); 1523 } 1524 | init_lbrace init_rbrace { 1525 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1526 } 1527 | init_lbrace initializer_list comma_opt init_rbrace 1528 /* XXX: What is this error handling for? */ 1529 | error 1530 ; 1531 1532 initializer_list: /* C99 6.7.8 "Initialization" */ 1533 initializer_list_item 1534 | initializer_list T_COMMA initializer_list_item 1535 ; 1536 1537 initializer_list_item: /* helper */ 1538 designation initializer 1539 | initializer 1540 ; 1541 1542 designation: /* C99 6.7.8 "Initialization" */ 1543 designator_list T_ASSIGN 1544 | identifier T_COLON { 1545 /* GCC style struct or union member name in initializer */ 1546 gnuism(315); 1547 add_designator_member($1); 1548 } 1549 ; 1550 1551 designator_list: /* C99 6.7.8 "Initialization" */ 1552 designator 1553 | designator_list designator 1554 ; 1555 1556 designator: /* C99 6.7.8 "Initialization" */ 1557 T_LBRACK range T_RBRACK { 1558 add_designator_subscript($2); 1559 if (!Sflag) 1560 /* array initializer with des.s is a C9X feature */ 1561 warning(321); 1562 } 1563 | T_POINT identifier { 1564 if (!Sflag) 1565 /* struct or union member name in initializer is ... */ 1566 warning(313); 1567 add_designator_member($2); 1568 } 1569 ; 1570 1571 range: 1572 constant_expr { 1573 $$.lo = to_int_constant($1, true); 1574 $$.hi = $$.lo; 1575 } 1576 | constant_expr T_ELLIPSIS constant_expr { 1577 $$.lo = to_int_constant($1, true); 1578 $$.hi = to_int_constant($3, true); 1579 /* initialization with '[a...b]' is a GCC extension */ 1580 gnuism(340); 1581 } 1582 ; 1583 1584 init_lbrace: /* helper */ 1585 T_LBRACE { 1586 init_lbrace(); 1587 } 1588 ; 1589 1590 init_rbrace: /* helper */ 1591 T_RBRACE { 1592 init_rbrace(); 1593 } 1594 ; 1595 1596 asm_or_symbolrename_opt: /* GCC extensions */ 1597 /* empty */ { 1598 $$ = NULL; 1599 } 1600 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1601 freeyyv(&$3, T_STRING); 1602 $$ = NULL; 1603 } 1604 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1605 $$ = $3; 1606 } 1607 ; 1608 1609 statement: /* C99 6.8 */ 1610 expression_statement 1611 | non_expr_statement 1612 ; 1613 1614 non_expr_statement: /* helper for C99 6.8 */ 1615 type_attribute T_SEMI 1616 | labeled_statement 1617 | compound_statement 1618 | selection_statement 1619 | iteration_statement 1620 | jump_statement { 1621 seen_fallthrough = false; 1622 } 1623 | asm_statement 1624 ; 1625 1626 labeled_statement: /* C99 6.8.1 */ 1627 label type_attribute_opt statement 1628 ; 1629 1630 label: 1631 T_NAME T_COLON { 1632 symtyp = FLABEL; 1633 named_label(getsym($1)); 1634 } 1635 | T_CASE constant_expr T_COLON { 1636 case_label($2); 1637 seen_fallthrough = true; 1638 } 1639 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1640 /* XXX: We don't fill all cases */ 1641 case_label($2); 1642 seen_fallthrough = true; 1643 } 1644 | T_DEFAULT T_COLON { 1645 default_label(); 1646 seen_fallthrough = true; 1647 } 1648 ; 1649 1650 compound_statement: /* C99 6.8.2 */ 1651 compound_statement_lbrace compound_statement_rbrace 1652 | compound_statement_lbrace block_item_list compound_statement_rbrace 1653 ; 1654 1655 compound_statement_lbrace: 1656 T_LBRACE { 1657 block_level++; 1658 mem_block_level++; 1659 begin_declaration_level(AUTO); 1660 } 1661 ; 1662 1663 compound_statement_rbrace: 1664 T_RBRACE { 1665 end_declaration_level(); 1666 freeblk(); 1667 mem_block_level--; 1668 block_level--; 1669 seen_fallthrough = false; 1670 } 1671 ; 1672 1673 block_item_list: /* C99 6.8.2 */ 1674 block_item 1675 | block_item_list block_item { 1676 if (!Sflag && $1 && !$2) 1677 /* declarations after statements is a C99 feature */ 1678 c99ism(327); 1679 $$ = $1 || $2; 1680 } 1681 ; 1682 1683 block_item: /* C99 6.8.2 */ 1684 declaration_or_error { 1685 $$ = false; 1686 restore_warning_flags(); 1687 } 1688 | statement { 1689 $$ = true; 1690 restore_warning_flags(); 1691 } 1692 ; 1693 1694 expression_statement: /* C99 6.8.3 */ 1695 expression T_SEMI { 1696 expr($1, false, false, false, false); 1697 seen_fallthrough = false; 1698 } 1699 | T_SEMI { 1700 seen_fallthrough = false; 1701 } 1702 ; 1703 1704 selection_statement: /* C99 6.8.4 */ 1705 if_without_else %prec T_THEN { 1706 save_warning_flags(); 1707 if2(); 1708 if3(false); 1709 } 1710 | if_without_else T_ELSE { 1711 save_warning_flags(); 1712 if2(); 1713 } statement { 1714 clear_warning_flags(); 1715 if3(true); 1716 } 1717 | if_without_else T_ELSE error { 1718 clear_warning_flags(); 1719 if3(false); 1720 } 1721 | switch_expr statement { 1722 clear_warning_flags(); 1723 switch2(); 1724 } 1725 | switch_expr error { 1726 clear_warning_flags(); 1727 switch2(); 1728 } 1729 ; 1730 1731 if_without_else: /* see C99 6.8.4 */ 1732 if_expr statement 1733 | if_expr error 1734 ; 1735 1736 if_expr: /* see C99 6.8.4 */ 1737 T_IF T_LPAREN expression T_RPAREN { 1738 if1($3); 1739 clear_warning_flags(); 1740 } 1741 ; 1742 1743 switch_expr: /* see C99 6.8.4 */ 1744 T_SWITCH T_LPAREN expression T_RPAREN { 1745 switch1($3); 1746 clear_warning_flags(); 1747 } 1748 ; 1749 1750 iteration_statement: /* C99 6.8.5 */ 1751 while_expr statement { 1752 clear_warning_flags(); 1753 while2(); 1754 } 1755 | while_expr error { 1756 clear_warning_flags(); 1757 while2(); 1758 } 1759 | do_statement do_while_expr { 1760 do2($2); 1761 seen_fallthrough = false; 1762 } 1763 | do error { 1764 clear_warning_flags(); 1765 do2(NULL); 1766 } 1767 | for_exprs statement { 1768 clear_warning_flags(); 1769 for2(); 1770 end_declaration_level(); 1771 block_level--; 1772 } 1773 | for_exprs error { 1774 clear_warning_flags(); 1775 for2(); 1776 end_declaration_level(); 1777 block_level--; 1778 } 1779 ; 1780 1781 while_expr: /* see C99 6.8.5 */ 1782 T_WHILE T_LPAREN expression T_RPAREN { 1783 while1($3); 1784 clear_warning_flags(); 1785 } 1786 ; 1787 1788 do_statement: /* see C99 6.8.5 */ 1789 do statement { 1790 clear_warning_flags(); 1791 } 1792 ; 1793 1794 do: /* see C99 6.8.5 */ 1795 T_DO { 1796 do1(); 1797 } 1798 ; 1799 1800 do_while_expr: /* see C99 6.8.5 */ 1801 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1802 $$ = $3; 1803 } 1804 ; 1805 1806 for_start: /* see C99 6.8.5 */ 1807 T_FOR T_LPAREN { 1808 begin_declaration_level(AUTO); 1809 block_level++; 1810 } 1811 ; 1812 1813 for_exprs: /* see C99 6.8.5 */ 1814 for_start 1815 begin_type_declaration_specifiers end_type 1816 notype_init_declarators T_SEMI 1817 expression_opt T_SEMI expression_opt T_RPAREN { 1818 /* variable declaration in for loop */ 1819 c99ism(325); 1820 for1(NULL, $6, $8); 1821 clear_warning_flags(); 1822 } 1823 | for_start 1824 expression_opt T_SEMI 1825 expression_opt T_SEMI 1826 expression_opt T_RPAREN { 1827 for1($2, $4, $6); 1828 clear_warning_flags(); 1829 } 1830 ; 1831 1832 jump_statement: /* C99 6.8.6 */ 1833 goto identifier T_SEMI { 1834 do_goto(getsym($2)); 1835 } 1836 | goto error T_SEMI { 1837 symtyp = FVFT; 1838 } 1839 | T_CONTINUE T_SEMI { 1840 do_continue(); 1841 } 1842 | T_BREAK T_SEMI { 1843 do_break(); 1844 } 1845 | T_RETURN T_SEMI { 1846 do_return(NULL); 1847 } 1848 | T_RETURN expression T_SEMI { 1849 do_return($2); 1850 } 1851 ; 1852 1853 goto: /* see C99 6.8.6 */ 1854 T_GOTO { 1855 symtyp = FLABEL; 1856 } 1857 ; 1858 1859 asm_statement: /* GCC extension */ 1860 T_ASM T_LPAREN read_until_rparen T_SEMI { 1861 setasm(); 1862 } 1863 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1864 setasm(); 1865 } 1866 | T_ASM error 1867 ; 1868 1869 read_until_rparen: /* helper for 'asm_statement' */ 1870 /* empty */ { 1871 read_until_rparen(); 1872 } 1873 ; 1874 1875 translation_unit: /* C99 6.9 */ 1876 external_declaration 1877 | translation_unit external_declaration 1878 ; 1879 1880 external_declaration: /* C99 6.9 */ 1881 function_definition { 1882 global_clean_up_decl(false); 1883 clear_warning_flags(); 1884 } 1885 | top_level_declaration { 1886 global_clean_up_decl(false); 1887 clear_warning_flags(); 1888 } 1889 | asm_statement /* GCC extension */ 1890 | T_SEMI { /* GCC extension */ 1891 if (sflag) { 1892 /* empty declaration */ 1893 error(0); 1894 } else if (!tflag) { 1895 /* empty declaration */ 1896 warning(0); 1897 } 1898 } 1899 ; 1900 1901 /* 1902 * On the top level, lint allows several forms of declarations that it doesn't 1903 * allow in functions. For example, a single ';' is an empty declaration and 1904 * is supported by some compilers, but in a function it would be an empty 1905 * statement, not a declaration. This makes a difference in C90 mode, where 1906 * a statement must not be followed by a declaration. 1907 * 1908 * See 'declaration' for all other declarations. 1909 */ 1910 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1911 begin_type end_type notype_init_declarators T_SEMI { 1912 if (sflag) { 1913 /* old style declaration; add 'int' */ 1914 error(1); 1915 } else if (!tflag) { 1916 /* old style declaration; add 'int' */ 1917 warning(1); 1918 } 1919 } 1920 | declaration 1921 | error T_SEMI { 1922 global_clean_up(); 1923 } 1924 | error T_RBRACE { 1925 global_clean_up(); 1926 } 1927 ; 1928 1929 function_definition: /* C99 6.9.1 */ 1930 func_declarator { 1931 if ($1->s_type->t_tspec != FUNC) { 1932 /* syntax error '%s' */ 1933 error(249, yytext); 1934 YYERROR; 1935 } 1936 if ($1->s_type->t_typedef) { 1937 /* ()-less function definition */ 1938 error(64); 1939 YYERROR; 1940 } 1941 funcdef($1); 1942 block_level++; 1943 begin_declaration_level(ARG); 1944 if (lwarn == LWARN_NONE) 1945 $1->s_used = true; 1946 } arg_declaration_list_opt { 1947 end_declaration_level(); 1948 block_level--; 1949 check_func_lint_directives(); 1950 check_func_old_style_arguments(); 1951 begin_control_statement(CS_FUNCTION_BODY); 1952 } compound_statement { 1953 funcend(); 1954 end_control_statement(CS_FUNCTION_BODY); 1955 } 1956 ; 1957 1958 func_declarator: 1959 begin_type end_type notype_declarator { 1960 /* ^^ There is no check for the missing type-specifier. */ 1961 $$ = $3; 1962 } 1963 | begin_type_declmods end_type notype_declarator { 1964 /* ^^ There is no check for the missing type-specifier. */ 1965 $$ = $3; 1966 } 1967 | begin_type_declaration_specifiers end_type type_declarator { 1968 $$ = $3; 1969 } 1970 ; 1971 1972 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1973 /* empty */ 1974 | arg_declaration_list 1975 ; 1976 1977 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 1978 arg_declaration 1979 | arg_declaration_list arg_declaration 1980 /* XXX or better "arg_declaration error" ? */ 1981 | error 1982 ; 1983 1984 /* 1985 * "arg_declaration" is separated from "declaration" because it 1986 * needs other error handling. 1987 */ 1988 arg_declaration: 1989 begin_type_declmods end_type T_SEMI { 1990 /* empty declaration */ 1991 warning(2); 1992 } 1993 | begin_type_declmods end_type notype_init_declarators T_SEMI 1994 | begin_type_declaration_specifiers end_type T_SEMI { 1995 if (!dcs->d_nonempty_decl) { 1996 /* empty declaration */ 1997 warning(2); 1998 } else { 1999 /* '%s' declared in argument declaration list */ 2000 warning(3, type_name(dcs->d_type)); 2001 } 2002 } 2003 | begin_type_declaration_specifiers end_type 2004 type_init_declarators T_SEMI { 2005 if (dcs->d_nonempty_decl) { 2006 /* '%s' declared in argument declaration list */ 2007 warning(3, type_name(dcs->d_type)); 2008 } 2009 } 2010 | begin_type_declmods error 2011 | begin_type_declaration_specifiers error 2012 ; 2013 2014 gcc_attribute_list_opt: 2015 /* empty */ 2016 | gcc_attribute_list 2017 ; 2018 2019 gcc_attribute_list: 2020 gcc_attribute 2021 | gcc_attribute_list gcc_attribute 2022 ; 2023 2024 gcc_attribute: 2025 T_ATTRIBUTE T_LPAREN T_LPAREN { 2026 attron = true; 2027 } gcc_attribute_spec_list { 2028 attron = false; 2029 } T_RPAREN T_RPAREN 2030 ; 2031 2032 gcc_attribute_spec_list: 2033 gcc_attribute_spec 2034 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2035 ; 2036 2037 gcc_attribute_spec: 2038 /* empty */ 2039 | T_AT_ALWAYS_INLINE 2040 | T_AT_ALIAS T_LPAREN string T_RPAREN 2041 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2042 | T_AT_ALIGNED 2043 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2044 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2045 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2046 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2047 | T_AT_COLD 2048 | T_AT_COMMON 2049 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2050 | T_AT_CONSTRUCTOR 2051 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2052 | T_AT_DEPRECATED 2053 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2054 | T_AT_DESTRUCTOR 2055 | T_AT_FALLTHROUGH { 2056 fallthru(1); 2057 } 2058 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2059 constant_expr T_COMMA constant_expr T_RPAREN 2060 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2061 | T_AT_GNU_INLINE 2062 | T_AT_HOT 2063 | T_AT_MALLOC 2064 | T_AT_MAY_ALIAS 2065 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2066 | T_AT_NOINLINE 2067 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2068 | T_AT_NONNULL 2069 | T_AT_NONSTRING 2070 | T_AT_NORETURN 2071 | T_AT_NOTHROW 2072 | T_AT_NO_INSTRUMENT_FUNCTION 2073 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2074 | T_AT_PACKED { 2075 addpacked(); 2076 } 2077 | T_AT_PCS T_LPAREN string T_RPAREN 2078 | T_AT_PURE 2079 | T_AT_RETURNS_TWICE 2080 | T_AT_SECTION T_LPAREN string T_RPAREN 2081 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2082 | T_AT_SENTINEL 2083 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2084 | T_AT_TUNION 2085 | T_AT_UNUSED { 2086 add_attr_used(); 2087 } 2088 | T_AT_USED { 2089 add_attr_used(); 2090 } 2091 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2092 | T_AT_WARN_UNUSED_RESULT 2093 | T_AT_WEAK 2094 | T_QUAL { 2095 if ($1 != CONST) 2096 yyerror("Bad attribute"); 2097 } 2098 ; 2099 2100 gcc_attribute_bounded: 2101 T_AT_MINBYTES 2102 | T_AT_STRING 2103 | T_AT_BUFFER 2104 ; 2105 2106 gcc_attribute_format: 2107 T_AT_FORMAT_GNU_PRINTF 2108 | T_AT_FORMAT_PRINTF 2109 | T_AT_FORMAT_SCANF 2110 | T_AT_FORMAT_STRFMON 2111 | T_AT_FORMAT_STRFTIME 2112 | T_AT_FORMAT_SYSLOG 2113 ; 2114 2115 %% 2116 2117 /* ARGSUSED */ 2118 int 2119 yyerror(const char *msg) 2120 { 2121 /* syntax error '%s' */ 2122 error(249, yytext); 2123 if (++sytxerr >= 5) 2124 norecover(); 2125 return 0; 2126 } 2127 2128 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2129 || (defined(YYDEBUG) && defined(YYBISON)) 2130 static const char * 2131 cgram_to_string(int token, YYSTYPE val) 2132 { 2133 static const char *tqual_name[] = { 2134 "const", "volatile", "restrict", "_Thread_local" 2135 }; 2136 2137 switch (token) { 2138 case T_INCDEC: 2139 case T_MULTIPLICATIVE: 2140 case T_ADDITIVE: 2141 case T_SHIFT: 2142 case T_RELATIONAL: 2143 case T_EQUALITY: 2144 case T_OPASSIGN: 2145 return modtab[val.y_op].m_name; 2146 case T_SCLASS: 2147 return scl_name(val.y_scl); 2148 case T_TYPE: 2149 case T_STRUCT_OR_UNION: 2150 return tspec_name(val.y_tspec); 2151 case T_QUAL: 2152 return tqual_name[val.y_tqual]; 2153 case T_NAME: 2154 return val.y_name->sb_name; 2155 default: 2156 return "<none>"; 2157 } 2158 } 2159 #endif 2160 2161 #if defined(YYDEBUG) && defined(YYBISON) 2162 static void 2163 cgram_print(FILE *output, int token, YYSTYPE val) 2164 { 2165 fprintf(output, "%s", cgram_to_string(token, val)); 2166 } 2167 #endif 2168 2169 static void 2170 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2171 { 2172 declare(decl, initflg, renaming); 2173 if (renaming != NULL) 2174 freeyyv(&renaming, T_NAME); 2175 } 2176 2177 /* 2178 * Discard all input tokens up to and including the next 2179 * unmatched right paren 2180 */ 2181 static void 2182 read_until_rparen(void) 2183 { 2184 int level; 2185 2186 if (yychar < 0) 2187 yychar = yylex(); 2188 freeyyv(&yylval, yychar); 2189 2190 level = 1; 2191 while (yychar != T_RPAREN || --level > 0) { 2192 if (yychar == T_LPAREN) { 2193 level++; 2194 } else if (yychar <= 0) { 2195 break; 2196 } 2197 freeyyv(&yylval, yychar = yylex()); 2198 } 2199 2200 yyclearin; 2201 } 2202 2203 static sym_t * 2204 symbolrename(sym_t *s, sbuf_t *sb) 2205 { 2206 if (sb != NULL) 2207 s->s_rename = sb->sb_name; 2208 return s; 2209 } 2210
Indexes created Fri Oct 03 02:09:57 GMT 2025