cgram.y revision 1.357
1 %{ 2 /* $NetBSD: cgram.y,v 1.357 2021/08/21 07:03:30 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 1.357 2021/08/21 07:03:30 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_NONNULL 252 %token T_AT_RETURNS_TWICE 253 %token T_AT_SECTION 254 %token T_AT_SENTINEL 255 %token T_AT_STRING 256 %token T_AT_TLS_MODEL 257 %token T_AT_TUNION 258 %token T_AT_UNUSED 259 %token T_AT_USED 260 %token T_AT_VISIBILITY 261 %token T_AT_WARN_UNUSED_RESULT 262 %token T_AT_WEAK 263 264 %left T_THEN 265 %left T_ELSE 266 %right T_QUEST T_COLON 267 %left T_LOGOR 268 %left T_LOGAND 269 %left T_BITOR 270 %left T_BITXOR 271 %left T_AMPER 272 %left T_EQUALITY 273 %left T_RELATIONAL 274 %left T_SHIFT 275 %left T_ADDITIVE 276 %left T_ASTERISK T_MULTIPLICATIVE 277 278 %token <y_name> T_NAME 279 %token <y_name> T_TYPENAME 280 %token <y_val> T_CON 281 %token <y_string> T_STRING 282 283 %type <y_sym> identifier_sym 284 %type <y_name> identifier 285 %type <y_string> string 286 %type <y_string> string2 287 288 %type <y_tnode> primary_expression 289 %type <y_tnode> generic_selection 290 %type <y_generic> generic_assoc_list 291 %type <y_generic> generic_association 292 %type <y_tnode> postfix_expression 293 %type <y_tnode> gcc_statement_expr_list 294 %type <y_tnode> gcc_statement_expr_item 295 %type <y_op> point_or_arrow 296 %type <y_tnode> argument_expression_list 297 %type <y_tnode> unary_expression 298 %type <y_tnode> cast_expression 299 %type <y_tnode> conditional_expression 300 %type <y_tnode> assignment_expression 301 %type <y_tnode> expression_opt 302 %type <y_tnode> expression 303 %type <y_tnode> constant_expr 304 305 %type <y_type> begin_type_typespec 306 %type <y_type> type_specifier 307 %type <y_type> notype_type_specifier 308 %type <y_type> struct_or_union_specifier 309 %type <y_tspec> struct_or_union 310 %type <y_sym> braced_struct_declaration_list 311 %type <y_sym> struct_declaration_list_with_rbrace 312 %type <y_sym> struct_declaration_list 313 %type <y_sym> struct_declaration 314 %type <y_sym> notype_struct_declarators 315 %type <y_sym> type_struct_declarators 316 %type <y_sym> notype_struct_declarator 317 %type <y_sym> type_struct_declarator 318 %type <y_type> enum_specifier 319 %type <y_sym> enum_declaration 320 %type <y_sym> enums_with_opt_comma 321 %type <y_sym> enumerator_list 322 %type <y_sym> enumerator 323 %type <y_qual_ptr> type_qualifier 324 %type <y_qual_ptr> pointer 325 %type <y_qual_ptr> asterisk 326 %type <y_qual_ptr> type_qualifier_list_opt 327 %type <y_qual_ptr> type_qualifier_list 328 %type <y_sym> notype_declarator 329 %type <y_sym> type_declarator 330 %type <y_sym> notype_direct_declarator 331 %type <y_sym> type_direct_declarator 332 %type <y_sym> type_param_declarator 333 %type <y_sym> notype_param_declarator 334 %type <y_sym> direct_param_declarator 335 %type <y_sym> direct_notype_param_declarator 336 %type <y_sym> param_list 337 %type <y_tnode> array_size 338 %type <y_sym> identifier_list 339 %type <y_type> type_name 340 %type <y_sym> abstract_declaration 341 %type <y_sym> abstract_declarator 342 %type <y_sym> direct_abstract_declarator 343 %type <y_sym> abstract_decl_param_list 344 %type <y_sym> vararg_parameter_type_list 345 %type <y_sym> parameter_type_list 346 %type <y_sym> parameter_declaration 347 %type <y_range> range 348 %type <y_name> asm_or_symbolrename_opt 349 350 %type <y_seen_statement> block_item_list 351 %type <y_seen_statement> block_item 352 %type <y_tnode> do_while_expr 353 %type <y_sym> func_declarator 354 355 %{ 356 #if defined(YYDEBUG) && defined(YYBISON) 357 static void cgram_print(FILE *, int, YYSTYPE); 358 #endif 359 %} 360 361 %% 362 363 program: 364 /* empty */ { 365 if (sflag) { 366 /* empty translation unit */ 367 error(272); 368 } else if (!tflag) { 369 /* empty translation unit */ 370 warning(272); 371 } 372 } 373 | translation_unit 374 ; 375 376 identifier_sym: /* helper for struct/union/enum */ 377 identifier { 378 $$ = getsym($1); 379 } 380 ; 381 382 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 383 identifier: 384 T_NAME { 385 debug_step("cgram: name '%s'", $1->sb_name); 386 $$ = $1; 387 } 388 | T_TYPENAME { 389 debug_step("cgram: typename '%s'", $1->sb_name); 390 $$ = $1; 391 } 392 ; 393 394 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 395 string: 396 T_STRING 397 | T_STRING string2 { 398 $$ = cat_strings($1, $2); 399 } 400 ; 401 402 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 403 string2: 404 T_STRING { 405 if (tflag) { 406 /* concatenated strings are illegal in traditional C */ 407 warning(219); 408 } 409 $$ = $1; 410 } 411 | string2 T_STRING { 412 $$ = cat_strings($1, $2); 413 } 414 ; 415 416 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 417 primary_expression: 418 T_NAME { 419 /* XXX really necessary? */ 420 if (yychar < 0) 421 yychar = yylex(); 422 $$ = build_name(getsym($1), yychar); 423 } 424 | T_CON { 425 $$ = build_constant(gettyp($1->v_tspec), $1); 426 } 427 | string { 428 $$ = build_string($1); 429 } 430 | T_LPAREN expression T_RPAREN { 431 if ($2 != NULL) 432 $2->tn_parenthesized = true; 433 $$ = $2; 434 } 435 | generic_selection 436 /* GCC primary-expression, see c_parser_postfix_expression */ 437 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 438 symtyp = FMEMBER; 439 $$ = build_offsetof($3, getsym($5)); 440 } 441 ; 442 443 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 444 generic_selection: 445 T_GENERIC T_LPAREN assignment_expression T_COMMA 446 generic_assoc_list T_RPAREN { 447 /* generic selection requires C11 or later */ 448 c11ism(345); 449 $$ = build_generic_selection($3, $5); 450 } 451 ; 452 453 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 454 generic_assoc_list: 455 generic_association 456 | generic_assoc_list T_COMMA generic_association { 457 $3->ga_prev = $1; 458 $$ = $3; 459 } 460 ; 461 462 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 463 generic_association: 464 type_name T_COLON assignment_expression { 465 $$ = getblk(sizeof(*$$)); 466 $$->ga_arg = $1; 467 $$->ga_result = $3; 468 } 469 | T_DEFAULT T_COLON assignment_expression { 470 $$ = getblk(sizeof(*$$)); 471 $$->ga_arg = NULL; 472 $$->ga_result = $3; 473 } 474 ; 475 476 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 477 postfix_expression: 478 primary_expression 479 | postfix_expression T_LBRACK expression T_RBRACK { 480 $$ = build_unary(INDIR, build_binary($1, PLUS, $3)); 481 } 482 | postfix_expression T_LPAREN T_RPAREN { 483 $$ = build_function_call($1, NULL); 484 } 485 | postfix_expression T_LPAREN argument_expression_list T_RPAREN { 486 $$ = build_function_call($1, $3); 487 } 488 | postfix_expression point_or_arrow T_NAME { 489 $$ = build_member_access($1, $2, $3); 490 } 491 | postfix_expression T_INCDEC { 492 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $1); 493 } 494 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 495 sym_t *tmp = mktempsym($2); 496 begin_initialization(tmp); 497 cgram_declare(tmp, true, NULL); 498 } init_lbrace initializer_list comma_opt init_rbrace { 499 if (!Sflag) 500 /* compound literals are a C9X/GCC extension */ 501 gnuism(319); 502 $$ = build_name(*current_initsym(), 0); 503 end_initialization(); 504 } 505 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 506 block_level--; 507 mem_block_level--; 508 begin_initialization(mktempsym(dup_type($3->tn_type))); 509 mem_block_level++; 510 block_level++; 511 /* ({ }) is a GCC extension */ 512 gnuism(320); 513 } compound_statement_rbrace T_RPAREN { 514 $$ = build_name(*current_initsym(), 0); 515 end_initialization(); 516 } 517 ; 518 519 comma_opt: /* helper for 'postfix_expression' */ 520 /* empty */ 521 | T_COMMA 522 ; 523 524 /* 525 * The inner part of a GCC statement-expression of the form ({ ... }). 526 * 527 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 528 */ 529 gcc_statement_expr_list: 530 gcc_statement_expr_item 531 | gcc_statement_expr_list gcc_statement_expr_item { 532 $$ = $2; 533 } 534 ; 535 536 gcc_statement_expr_item: 537 declaration_or_error { 538 clear_warning_flags(); 539 $$ = NULL; 540 } 541 | non_expr_statement { 542 $$ = expr_zalloc_tnode(); 543 $$->tn_type = gettyp(VOID); 544 } 545 | expression T_SEMI { 546 if ($1 == NULL) { /* in case of syntax errors */ 547 $$ = expr_zalloc_tnode(); 548 $$->tn_type = gettyp(VOID); 549 } else { 550 /* XXX: do that only on the last name */ 551 if ($1->tn_op == NAME) 552 $1->tn_sym->s_used = true; 553 expr($1, false, false, false, false); 554 seen_fallthrough = false; 555 $$ = $1; 556 } 557 } 558 ; 559 560 point_or_arrow: /* helper for 'postfix_expression' */ 561 T_POINT { 562 symtyp = FMEMBER; 563 $$ = POINT; 564 } 565 | T_ARROW { 566 symtyp = FMEMBER; 567 $$ = ARROW; 568 } 569 ; 570 571 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 572 argument_expression_list: 573 assignment_expression { 574 $$ = build_function_argument(NULL, $1); 575 } 576 | argument_expression_list T_COMMA assignment_expression { 577 $$ = build_function_argument($1, $3); 578 } 579 ; 580 581 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 582 unary_expression: 583 postfix_expression 584 | T_INCDEC unary_expression { 585 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2); 586 } 587 | T_AMPER cast_expression { 588 $$ = build_unary(ADDR, $2); 589 } 590 | T_ASTERISK cast_expression { 591 $$ = build_unary(INDIR, $2); 592 } 593 | T_ADDITIVE cast_expression { 594 if (tflag && $1 == PLUS) { 595 /* unary + is illegal in traditional C */ 596 warning(100); 597 } 598 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2); 599 } 600 | T_COMPLEMENT cast_expression { 601 $$ = build_unary(COMPL, $2); 602 } 603 | T_LOGNOT cast_expression { 604 $$ = build_unary(NOT, $2); 605 } 606 | T_REAL cast_expression { /* GCC c_parser_unary_expression */ 607 $$ = build_unary(REAL, $2); 608 } 609 | T_IMAG cast_expression { /* GCC c_parser_unary_expression */ 610 $$ = build_unary(IMAG, $2); 611 } 612 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 613 $$ = $2; 614 } 615 | T_SIZEOF unary_expression { 616 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 617 if ($$ != NULL) 618 check_expr_misc($2, 619 false, false, false, false, false, true); 620 } 621 | T_SIZEOF T_LPAREN type_name T_RPAREN { 622 $$ = build_sizeof($3); 623 } 624 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 625 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 626 /* TODO: c11ism */ 627 $$ = build_alignof($3); 628 } 629 ; 630 631 /* The rule 'unary_operator' is inlined into unary_expression. */ 632 633 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 634 cast_expression: 635 unary_expression 636 | T_LPAREN type_name T_RPAREN cast_expression { 637 $$ = cast($4, $2); 638 } 639 ; 640 641 expression_opt: 642 /* empty */ { 643 $$ = NULL; 644 } 645 | expression 646 ; 647 648 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 649 /* 'conditional_expression' also implements 'additive_expression'. */ 650 /* 'conditional_expression' also implements 'shift_expression'. */ 651 /* 'conditional_expression' also implements 'relational_expression'. */ 652 /* 'conditional_expression' also implements 'equality_expression'. */ 653 /* 'conditional_expression' also implements 'AND_expression'. */ 654 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 655 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 656 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 657 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 658 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 659 conditional_expression: 660 cast_expression 661 | conditional_expression T_ASTERISK conditional_expression { 662 $$ = build_binary($1, MULT, $3); 663 } 664 | conditional_expression T_MULTIPLICATIVE conditional_expression { 665 $$ = build_binary($1, $2, $3); 666 } 667 | conditional_expression T_ADDITIVE conditional_expression { 668 $$ = build_binary($1, $2, $3); 669 } 670 | conditional_expression T_SHIFT conditional_expression { 671 $$ = build_binary($1, $2, $3); 672 } 673 | conditional_expression T_RELATIONAL conditional_expression { 674 $$ = build_binary($1, $2, $3); 675 } 676 | conditional_expression T_EQUALITY conditional_expression { 677 $$ = build_binary($1, $2, $3); 678 } 679 | conditional_expression T_AMPER conditional_expression { 680 $$ = build_binary($1, BITAND, $3); 681 } 682 | conditional_expression T_BITXOR conditional_expression { 683 $$ = build_binary($1, BITXOR, $3); 684 } 685 | conditional_expression T_BITOR conditional_expression { 686 $$ = build_binary($1, BITOR, $3); 687 } 688 | conditional_expression T_LOGAND conditional_expression { 689 $$ = build_binary($1, LOGAND, $3); 690 } 691 | conditional_expression T_LOGOR conditional_expression { 692 $$ = build_binary($1, LOGOR, $3); 693 } 694 | conditional_expression T_QUEST expression 695 T_COLON conditional_expression { 696 $$ = build_binary($1, QUEST, build_binary($3, COLON, $5)); 697 } 698 ; 699 700 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 701 assignment_expression: 702 conditional_expression 703 | unary_expression T_ASSIGN assignment_expression { 704 $$ = build_binary($1, ASSIGN, $3); 705 } 706 | unary_expression T_OPASSIGN assignment_expression { 707 $$ = build_binary($1, $2, $3); 708 } 709 ; 710 711 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 712 expression: 713 assignment_expression 714 | expression T_COMMA assignment_expression { 715 $$ = build_binary($1, COMMA, $3); 716 } 717 ; 718 719 constant_expr_list_opt: /* helper for gcc_attribute */ 720 /* empty */ 721 | constant_expr_list 722 ; 723 724 constant_expr_list: /* helper for gcc_attribute */ 725 constant_expr 726 | constant_expr_list T_COMMA constant_expr 727 ; 728 729 constant_expr: /* C99 6.6 */ 730 conditional_expression 731 ; 732 733 declaration_or_error: 734 declaration 735 | error T_SEMI 736 ; 737 738 declaration: /* C99 6.7 */ 739 begin_type_declmods end_type T_SEMI { 740 if (dcs->d_scl == TYPEDEF) { 741 /* typedef declares no type name */ 742 warning(72); 743 } else { 744 /* empty declaration */ 745 warning(2); 746 } 747 } 748 | begin_type_declmods end_type notype_init_declarators T_SEMI 749 /* ^^ There is no check for the missing type-specifier. */ 750 | begin_type_declaration_specifiers end_type T_SEMI { 751 if (dcs->d_scl == TYPEDEF) { 752 /* typedef declares no type name */ 753 warning(72); 754 } else if (!dcs->d_nonempty_decl) { 755 /* empty declaration */ 756 warning(2); 757 } 758 } 759 | begin_type_declaration_specifiers end_type 760 type_init_declarators T_SEMI 761 ; 762 763 begin_type_declaration_specifiers: /* see C99 6.7 */ 764 begin_type_typespec { 765 add_type($1); 766 } 767 | begin_type_declmods type_specifier { 768 add_type($2); 769 } 770 | type_attribute begin_type_declaration_specifiers 771 | begin_type_declaration_specifiers declmod 772 | begin_type_declaration_specifiers notype_type_specifier { 773 add_type($2); 774 } 775 ; 776 777 begin_type_declmods: /* see C99 6.7 */ 778 begin_type T_QUAL { 779 add_qualifier($2); 780 } 781 | begin_type T_SCLASS { 782 add_storage_class($2); 783 } 784 | begin_type_declmods declmod 785 ; 786 787 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 788 begin_type_specifier_qualifier_list_postfix 789 | type_attribute_list begin_type_specifier_qualifier_list_postfix 790 ; 791 792 begin_type_specifier_qualifier_list_postfix: 793 begin_type_typespec { 794 add_type($1); 795 } 796 | begin_type_qualifier_list type_specifier { 797 add_type($2); 798 } 799 | begin_type_specifier_qualifier_list_postfix T_QUAL { 800 add_qualifier($2); 801 } 802 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 803 add_type($2); 804 } 805 | begin_type_specifier_qualifier_list_postfix type_attribute 806 ; 807 808 begin_type_typespec: 809 begin_type notype_type_specifier { 810 $$ = $2; 811 } 812 | T_TYPENAME begin_type { 813 $$ = getsym($1)->s_type; 814 } 815 ; 816 817 begin_type_qualifier_list: 818 begin_type T_QUAL { 819 add_qualifier($2); 820 } 821 | begin_type_qualifier_list T_QUAL { 822 add_qualifier($2); 823 } 824 ; 825 826 declmod: 827 T_QUAL { 828 add_qualifier($1); 829 } 830 | T_SCLASS { 831 add_storage_class($1); 832 } 833 | type_attribute_list 834 ; 835 836 type_attribute_list: 837 type_attribute 838 | type_attribute_list type_attribute 839 ; 840 841 type_attribute_opt: 842 /* empty */ 843 | type_attribute 844 ; 845 846 type_attribute: /* See C11 6.7 declaration-specifiers */ 847 gcc_attribute 848 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 849 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 850 | T_PACKED { 851 addpacked(); 852 } 853 | T_NORETURN 854 ; 855 856 begin_type: 857 /* empty */ { 858 begin_type(); 859 } 860 ; 861 862 end_type: 863 /* empty */ { 864 end_type(); 865 } 866 ; 867 868 type_specifier: /* C99 6.7.2 */ 869 notype_type_specifier 870 | T_TYPENAME { 871 $$ = getsym($1)->s_type; 872 } 873 ; 874 875 notype_type_specifier: /* see C99 6.7.2 */ 876 T_TYPE { 877 $$ = gettyp($1); 878 } 879 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 880 $$ = $3->tn_type; 881 } 882 | struct_or_union_specifier { 883 end_declaration_level(); 884 $$ = $1; 885 } 886 | enum_specifier { 887 end_declaration_level(); 888 $$ = $1; 889 } 890 ; 891 892 struct_or_union_specifier: /* C99 6.7.2.1 */ 893 struct_or_union identifier_sym { 894 /* 895 * STDC requires that "struct a;" always introduces 896 * a new tag if "a" is not declared at current level 897 * 898 * yychar is valid because otherwise the parser would not 899 * have been able to decide if it must shift or reduce 900 */ 901 $$ = mktag($2, $1, false, yychar == T_SEMI); 902 } 903 | struct_or_union identifier_sym { 904 dcs->d_tagtyp = mktag($2, $1, true, false); 905 } braced_struct_declaration_list { 906 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 907 } 908 | struct_or_union { 909 dcs->d_tagtyp = mktag(NULL, $1, true, false); 910 } braced_struct_declaration_list { 911 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 912 } 913 | struct_or_union error { 914 symtyp = FVFT; 915 $$ = gettyp(INT); 916 } 917 ; 918 919 struct_or_union: /* C99 6.7.2.1 */ 920 T_STRUCT_OR_UNION { 921 symtyp = FTAG; 922 begin_declaration_level($1 == STRUCT ? MOS : MOU); 923 dcs->d_offset = 0; 924 dcs->d_sou_align_in_bits = CHAR_SIZE; 925 $$ = $1; 926 } 927 | struct_or_union type_attribute 928 ; 929 930 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 931 struct_declaration_lbrace struct_declaration_list_with_rbrace { 932 $$ = $2; 933 } 934 ; 935 936 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 937 T_LBRACE { 938 symtyp = FVFT; 939 } 940 ; 941 942 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 943 struct_declaration_list T_RBRACE 944 | T_RBRACE { 945 /* XXX: This is not allowed by any C standard. */ 946 $$ = NULL; 947 } 948 ; 949 950 struct_declaration_list: /* C99 6.7.2.1 */ 951 struct_declaration 952 | struct_declaration_list struct_declaration { 953 $$ = lnklst($1, $2); 954 } 955 ; 956 957 struct_declaration: /* C99 6.7.2.1 */ 958 begin_type_qualifier_list end_type { 959 /* ^^ There is no check for the missing type-specifier. */ 960 /* too late, i know, but getsym() compensates it */ 961 symtyp = FMEMBER; 962 } notype_struct_declarators type_attribute_opt T_SEMI { 963 symtyp = FVFT; 964 $$ = $4; 965 } 966 | begin_type_specifier_qualifier_list end_type { 967 symtyp = FMEMBER; 968 } type_struct_declarators type_attribute_opt T_SEMI { 969 symtyp = FVFT; 970 $$ = $4; 971 } 972 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 973 /* syntax error '%s' */ 974 error(249, "member without type"); 975 $$ = NULL; 976 } 977 | begin_type_specifier_qualifier_list end_type type_attribute_opt 978 T_SEMI { 979 symtyp = FVFT; 980 if (!Sflag) 981 /* anonymous struct/union members is a C9X feature */ 982 warning(49); 983 if (is_struct_or_union(dcs->d_type->t_tspec)) { 984 $$ = dcs->d_type->t_str->sou_first_member; 985 /* add all the members of the anonymous struct/union */ 986 anonymize($$); 987 } else { 988 /* syntax error '%s' */ 989 error(249, "unnamed member"); 990 $$ = NULL; 991 } 992 } 993 | error T_SEMI { 994 symtyp = FVFT; 995 $$ = NULL; 996 } 997 ; 998 999 notype_struct_declarators: 1000 notype_struct_declarator { 1001 $$ = declarator_1_struct_union($1); 1002 } 1003 | notype_struct_declarators { 1004 symtyp = FMEMBER; 1005 } T_COMMA type_struct_declarator { 1006 $$ = lnklst($1, declarator_1_struct_union($4)); 1007 } 1008 ; 1009 1010 type_struct_declarators: 1011 type_struct_declarator { 1012 $$ = declarator_1_struct_union($1); 1013 } 1014 | type_struct_declarators { 1015 symtyp = FMEMBER; 1016 } T_COMMA type_struct_declarator { 1017 $$ = lnklst($1, declarator_1_struct_union($4)); 1018 } 1019 ; 1020 1021 notype_struct_declarator: 1022 notype_declarator 1023 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1024 $$ = bitfield($1, to_int_constant($3, true)); 1025 } 1026 | { 1027 symtyp = FVFT; 1028 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1029 $$ = bitfield(NULL, to_int_constant($3, true)); 1030 } 1031 ; 1032 1033 type_struct_declarator: 1034 type_declarator 1035 | type_declarator T_COLON constant_expr { 1036 $$ = bitfield($1, to_int_constant($3, true)); 1037 } 1038 | { 1039 symtyp = FVFT; 1040 } T_COLON constant_expr { 1041 $$ = bitfield(NULL, to_int_constant($3, true)); 1042 } 1043 ; 1044 1045 enum_specifier: /* C99 6.7.2.2 */ 1046 enum gcc_attribute_list_opt identifier_sym { 1047 $$ = mktag($3, ENUM, false, false); 1048 } 1049 | enum gcc_attribute_list_opt identifier_sym { 1050 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1051 } enum_declaration /*gcc_attribute_list_opt*/ { 1052 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1053 } 1054 | enum gcc_attribute_list_opt { 1055 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1056 } enum_declaration /*gcc_attribute_list_opt*/ { 1057 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1058 } 1059 | enum error { 1060 symtyp = FVFT; 1061 $$ = gettyp(INT); 1062 } 1063 ; 1064 1065 enum: /* helper for C99 6.7.2.2 */ 1066 T_ENUM { 1067 symtyp = FTAG; 1068 begin_declaration_level(CTCONST); 1069 } 1070 ; 1071 1072 enum_declaration: /* helper for C99 6.7.2.2 */ 1073 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1074 $$ = $2; 1075 } 1076 ; 1077 1078 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1079 T_LBRACE { 1080 symtyp = FVFT; 1081 enumval = 0; 1082 } 1083 ; 1084 1085 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1086 enumerator_list 1087 | enumerator_list T_COMMA { 1088 if (sflag) { 1089 /* trailing ',' prohibited in enum declaration */ 1090 error(54); 1091 } else { 1092 /* trailing ',' prohibited in enum declaration */ 1093 c99ism(54); 1094 } 1095 $$ = $1; 1096 } 1097 ; 1098 1099 enumerator_list: /* C99 6.7.2.2 */ 1100 enumerator 1101 | enumerator_list T_COMMA enumerator { 1102 $$ = lnklst($1, $3); 1103 } 1104 | error { 1105 $$ = NULL; 1106 } 1107 ; 1108 1109 enumerator: /* C99 6.7.2.2 */ 1110 identifier_sym gcc_attribute_list_opt { 1111 $$ = enumeration_constant($1, enumval, true); 1112 } 1113 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1114 $$ = enumeration_constant($1, to_int_constant($4, true), 1115 false); 1116 } 1117 ; 1118 1119 type_qualifier: /* C99 6.7.3 */ 1120 T_QUAL { 1121 $$ = xcalloc(1, sizeof(*$$)); 1122 if ($1 == CONST) 1123 $$->p_const = true; 1124 if ($1 == VOLATILE) 1125 $$->p_volatile = true; 1126 } 1127 ; 1128 1129 pointer: /* C99 6.7.5 */ 1130 asterisk type_qualifier_list_opt { 1131 $$ = merge_qualified_pointer($1, $2); 1132 } 1133 | asterisk type_qualifier_list_opt pointer { 1134 $$ = merge_qualified_pointer($1, $2); 1135 $$ = merge_qualified_pointer($$, $3); 1136 } 1137 ; 1138 1139 asterisk: /* helper for 'pointer' */ 1140 T_ASTERISK { 1141 $$ = xcalloc(1, sizeof(*$$)); 1142 $$->p_pointer = true; 1143 } 1144 ; 1145 1146 type_qualifier_list_opt: /* see C99 6.7.5 */ 1147 /* empty */ { 1148 $$ = NULL; 1149 } 1150 | type_qualifier_list 1151 ; 1152 1153 type_qualifier_list: /* C99 6.7.5 */ 1154 type_qualifier 1155 | type_qualifier_list type_qualifier { 1156 $$ = merge_qualified_pointer($1, $2); 1157 } 1158 ; 1159 1160 /* 1161 * For an explanation of 'notype' in the following rules, see 1162 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1163 */ 1164 1165 notype_init_declarators: 1166 notype_init_declarator 1167 | notype_init_declarators T_COMMA type_init_declarator 1168 ; 1169 1170 type_init_declarators: 1171 type_init_declarator 1172 | type_init_declarators T_COMMA type_init_declarator 1173 ; 1174 1175 notype_init_declarator: 1176 notype_declarator asm_or_symbolrename_opt { 1177 cgram_declare($1, false, $2); 1178 check_size($1); 1179 } 1180 | notype_declarator asm_or_symbolrename_opt { 1181 begin_initialization($1); 1182 cgram_declare($1, true, $2); 1183 } T_ASSIGN initializer { 1184 check_size($1); 1185 end_initialization(); 1186 } 1187 ; 1188 1189 type_init_declarator: 1190 type_declarator asm_or_symbolrename_opt { 1191 cgram_declare($1, false, $2); 1192 check_size($1); 1193 } 1194 | type_declarator asm_or_symbolrename_opt { 1195 begin_initialization($1); 1196 cgram_declare($1, true, $2); 1197 } T_ASSIGN initializer { 1198 check_size($1); 1199 end_initialization(); 1200 } 1201 ; 1202 1203 notype_declarator: 1204 notype_direct_declarator 1205 | pointer notype_direct_declarator { 1206 $$ = add_pointer($2, $1); 1207 } 1208 ; 1209 1210 type_declarator: 1211 type_direct_declarator 1212 | pointer type_direct_declarator { 1213 $$ = add_pointer($2, $1); 1214 } 1215 ; 1216 1217 notype_direct_declarator: 1218 T_NAME { 1219 $$ = declarator_name(getsym($1)); 1220 } 1221 | T_LPAREN type_declarator T_RPAREN { 1222 $$ = $2; 1223 } 1224 | type_attribute notype_direct_declarator { 1225 $$ = $2; 1226 } 1227 | notype_direct_declarator T_LBRACK T_RBRACK { 1228 $$ = add_array($1, false, 0); 1229 } 1230 | notype_direct_declarator T_LBRACK array_size T_RBRACK { 1231 $$ = add_array($1, true, to_int_constant($3, false)); 1232 } 1233 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1234 $$ = add_function(symbolrename($1, $3), $2); 1235 end_declaration_level(); 1236 block_level--; 1237 } 1238 | notype_direct_declarator type_attribute 1239 ; 1240 1241 type_direct_declarator: 1242 identifier { 1243 $$ = declarator_name(getsym($1)); 1244 } 1245 | T_LPAREN type_declarator T_RPAREN { 1246 $$ = $2; 1247 } 1248 | type_attribute type_direct_declarator { 1249 $$ = $2; 1250 } 1251 | type_direct_declarator T_LBRACK T_RBRACK { 1252 $$ = add_array($1, false, 0); 1253 } 1254 | type_direct_declarator T_LBRACK array_size T_RBRACK { 1255 $$ = add_array($1, true, to_int_constant($3, false)); 1256 } 1257 | type_direct_declarator param_list asm_or_symbolrename_opt { 1258 $$ = add_function(symbolrename($1, $3), $2); 1259 end_declaration_level(); 1260 block_level--; 1261 } 1262 | type_direct_declarator type_attribute 1263 ; 1264 1265 /* 1266 * The two distinct rules type_param_declarator and notype_param_declarator 1267 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1268 * always treated as a typename, not an argument name. For example, after 1269 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1270 * "f(int (double));", not "f(int a);". 1271 */ 1272 type_param_declarator: 1273 direct_param_declarator 1274 | pointer direct_param_declarator { 1275 $$ = add_pointer($2, $1); 1276 } 1277 ; 1278 1279 notype_param_declarator: 1280 direct_notype_param_declarator 1281 | pointer direct_notype_param_declarator { 1282 $$ = add_pointer($2, $1); 1283 } 1284 ; 1285 1286 direct_param_declarator: 1287 identifier type_attribute_list { 1288 $$ = declarator_name(getsym($1)); 1289 } 1290 | identifier { 1291 $$ = declarator_name(getsym($1)); 1292 } 1293 | T_LPAREN notype_param_declarator T_RPAREN { 1294 $$ = $2; 1295 } 1296 | direct_param_declarator T_LBRACK T_RBRACK gcc_attribute_list_opt { 1297 $$ = add_array($1, false, 0); 1298 } 1299 | direct_param_declarator T_LBRACK array_size T_RBRACK 1300 gcc_attribute_list_opt { 1301 $$ = add_array($1, true, to_int_constant($3, false)); 1302 } 1303 | direct_param_declarator param_list asm_or_symbolrename_opt { 1304 $$ = add_function(symbolrename($1, $3), $2); 1305 end_declaration_level(); 1306 block_level--; 1307 } 1308 ; 1309 1310 direct_notype_param_declarator: 1311 identifier { 1312 $$ = declarator_name(getsym($1)); 1313 } 1314 | T_LPAREN notype_param_declarator T_RPAREN { 1315 $$ = $2; 1316 } 1317 | direct_notype_param_declarator T_LBRACK T_RBRACK { 1318 $$ = add_array($1, false, 0); 1319 } 1320 | direct_notype_param_declarator T_LBRACK array_size T_RBRACK { 1321 $$ = add_array($1, true, to_int_constant($3, false)); 1322 } 1323 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1324 $$ = add_function(symbolrename($1, $3), $2); 1325 end_declaration_level(); 1326 block_level--; 1327 } 1328 ; 1329 1330 param_list: 1331 id_list_lparen identifier_list T_RPAREN { 1332 $$ = $2; 1333 } 1334 | abstract_decl_param_list 1335 ; 1336 1337 id_list_lparen: 1338 T_LPAREN { 1339 block_level++; 1340 begin_declaration_level(PROTO_ARG); 1341 } 1342 ; 1343 1344 array_size: 1345 type_qualifier_list_opt T_SCLASS constant_expr { 1346 /* C11 6.7.6.3p7 */ 1347 if ($2 != STATIC) 1348 yyerror("Bad attribute"); 1349 /* static array size is a C11 extension */ 1350 c11ism(343); 1351 $$ = $3; 1352 } 1353 | constant_expr 1354 ; 1355 1356 identifier_list: /* C99 6.7.5 */ 1357 T_NAME { 1358 $$ = old_style_function_name(getsym($1)); 1359 } 1360 | identifier_list T_COMMA T_NAME { 1361 $$ = lnklst($1, old_style_function_name(getsym($3))); 1362 } 1363 | identifier_list error 1364 ; 1365 1366 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1367 type_name: /* C99 6.7.6 */ 1368 { 1369 begin_declaration_level(ABSTRACT); 1370 } abstract_declaration { 1371 end_declaration_level(); 1372 $$ = $2->s_type; 1373 } 1374 ; 1375 1376 abstract_declaration: /* specific to lint */ 1377 begin_type_qualifier_list end_type { 1378 $$ = declare_1_abstract(abstract_name()); 1379 } 1380 | begin_type_specifier_qualifier_list end_type { 1381 $$ = declare_1_abstract(abstract_name()); 1382 } 1383 | begin_type_qualifier_list end_type abstract_declarator { 1384 $$ = declare_1_abstract($3); 1385 } 1386 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1387 $$ = declare_1_abstract($3); 1388 } 1389 ; 1390 1391 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1392 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1393 abstract_declarator: 1394 pointer { 1395 $$ = add_pointer(abstract_name(), $1); 1396 } 1397 | direct_abstract_declarator 1398 | pointer direct_abstract_declarator { 1399 $$ = add_pointer($2, $1); 1400 } 1401 ; 1402 1403 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1404 direct_abstract_declarator: 1405 T_LPAREN abstract_declarator T_RPAREN { 1406 $$ = $2; 1407 } 1408 | T_LBRACK T_RBRACK { 1409 $$ = add_array(abstract_name(), false, 0); 1410 } 1411 | T_LBRACK array_size T_RBRACK { 1412 $$ = add_array(abstract_name(), true, 1413 to_int_constant($2, false)); 1414 } 1415 | type_attribute direct_abstract_declarator { 1416 $$ = $2; 1417 } 1418 | direct_abstract_declarator T_LBRACK T_RBRACK { 1419 $$ = add_array($1, false, 0); 1420 } 1421 | direct_abstract_declarator T_LBRACK T_ASTERISK T_RBRACK { /* C99 */ 1422 $$ = add_array($1, false, 0); 1423 } 1424 | direct_abstract_declarator T_LBRACK array_size T_RBRACK { 1425 $$ = add_array($1, true, to_int_constant($3, false)); 1426 } 1427 | abstract_decl_param_list asm_or_symbolrename_opt { 1428 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1429 end_declaration_level(); 1430 block_level--; 1431 } 1432 | direct_abstract_declarator abstract_decl_param_list 1433 asm_or_symbolrename_opt { 1434 $$ = add_function(symbolrename($1, $3), $2); 1435 end_declaration_level(); 1436 block_level--; 1437 } 1438 | direct_abstract_declarator type_attribute_list 1439 ; 1440 1441 abstract_decl_param_list: /* specific to lint */ 1442 abstract_decl_lparen T_RPAREN type_attribute_opt { 1443 $$ = NULL; 1444 } 1445 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1446 type_attribute_opt { 1447 dcs->d_proto = true; 1448 $$ = $2; 1449 } 1450 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1451 $$ = NULL; 1452 } 1453 ; 1454 1455 abstract_decl_lparen: /* specific to lint */ 1456 T_LPAREN { 1457 block_level++; 1458 begin_declaration_level(PROTO_ARG); 1459 } 1460 ; 1461 1462 vararg_parameter_type_list: /* specific to lint */ 1463 parameter_type_list 1464 | parameter_type_list T_COMMA T_ELLIPSIS { 1465 dcs->d_vararg = true; 1466 $$ = $1; 1467 } 1468 | T_ELLIPSIS { 1469 if (sflag) { 1470 /* ANSI C requires formal parameter before '...' */ 1471 error(84); 1472 } else if (!tflag) { 1473 /* ANSI C requires formal parameter before '...' */ 1474 warning(84); 1475 } 1476 dcs->d_vararg = true; 1477 $$ = NULL; 1478 } 1479 ; 1480 1481 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1482 parameter_type_list: 1483 parameter_declaration 1484 | parameter_type_list T_COMMA parameter_declaration { 1485 $$ = lnklst($1, $3); 1486 } 1487 ; 1488 1489 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1490 parameter_declaration: 1491 begin_type_declmods end_type { 1492 /* ^^ There is no check for the missing type-specifier. */ 1493 $$ = declare_argument(abstract_name(), false); 1494 } 1495 | begin_type_declaration_specifiers end_type { 1496 $$ = declare_argument(abstract_name(), false); 1497 } 1498 | begin_type_declmods end_type notype_param_declarator { 1499 /* ^^ There is no check for the missing type-specifier. */ 1500 $$ = declare_argument($3, false); 1501 } 1502 /* 1503 * type_param_declarator is needed because of following conflict: 1504 * "typedef int a; f(int (a));" could be parsed as 1505 * "function with argument a of type int", or 1506 * "function with an abstract argument of type function". 1507 * This grammar realizes the second case. 1508 */ 1509 | begin_type_declaration_specifiers end_type type_param_declarator { 1510 $$ = declare_argument($3, false); 1511 } 1512 | begin_type_declmods end_type abstract_declarator { 1513 /* ^^ There is no check for the missing type-specifier. */ 1514 $$ = declare_argument($3, false); 1515 } 1516 | begin_type_declaration_specifiers end_type abstract_declarator { 1517 $$ = declare_argument($3, false); 1518 } 1519 ; 1520 1521 initializer: /* C99 6.7.8 "Initialization" */ 1522 assignment_expression { 1523 init_expr($1); 1524 } 1525 | init_lbrace init_rbrace { 1526 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1527 } 1528 | init_lbrace initializer_list comma_opt init_rbrace 1529 /* XXX: What is this error handling for? */ 1530 | error 1531 ; 1532 1533 initializer_list: /* C99 6.7.8 "Initialization" */ 1534 initializer_list_item 1535 | initializer_list T_COMMA initializer_list_item 1536 ; 1537 1538 initializer_list_item: /* helper */ 1539 designation initializer 1540 | initializer 1541 ; 1542 1543 designation: /* C99 6.7.8 "Initialization" */ 1544 designator_list T_ASSIGN 1545 | identifier T_COLON { 1546 /* GCC style struct or union member name in initializer */ 1547 gnuism(315); 1548 add_designator_member($1); 1549 } 1550 ; 1551 1552 designator_list: /* C99 6.7.8 "Initialization" */ 1553 designator 1554 | designator_list designator 1555 ; 1556 1557 designator: /* C99 6.7.8 "Initialization" */ 1558 T_LBRACK range T_RBRACK { 1559 add_designator_subscript($2); 1560 if (!Sflag) 1561 /* array initializer with des.s is a C9X feature */ 1562 warning(321); 1563 } 1564 | T_POINT identifier { 1565 if (!Sflag) 1566 /* struct or union member name in initializer is ... */ 1567 warning(313); 1568 add_designator_member($2); 1569 } 1570 ; 1571 1572 range: 1573 constant_expr { 1574 $$.lo = to_int_constant($1, true); 1575 $$.hi = $$.lo; 1576 } 1577 | constant_expr T_ELLIPSIS constant_expr { 1578 $$.lo = to_int_constant($1, true); 1579 $$.hi = to_int_constant($3, true); 1580 /* initialization with '[a...b]' is a GCC extension */ 1581 gnuism(340); 1582 } 1583 ; 1584 1585 init_lbrace: /* helper */ 1586 T_LBRACE { 1587 init_lbrace(); 1588 } 1589 ; 1590 1591 init_rbrace: /* helper */ 1592 T_RBRACE { 1593 init_rbrace(); 1594 } 1595 ; 1596 1597 asm_or_symbolrename_opt: /* GCC extensions */ 1598 /* empty */ { 1599 $$ = NULL; 1600 } 1601 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1602 freeyyv(&$3, T_STRING); 1603 $$ = NULL; 1604 } 1605 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1606 $$ = $3; 1607 } 1608 ; 1609 1610 statement: /* C99 6.8 */ 1611 expression_statement 1612 | non_expr_statement 1613 ; 1614 1615 non_expr_statement: /* helper for C99 6.8 */ 1616 type_attribute T_SEMI 1617 | labeled_statement 1618 | compound_statement 1619 | selection_statement 1620 | iteration_statement 1621 | jump_statement { 1622 seen_fallthrough = false; 1623 } 1624 | asm_statement 1625 ; 1626 1627 labeled_statement: /* C99 6.8.1 */ 1628 label type_attribute_opt statement 1629 ; 1630 1631 label: 1632 T_NAME T_COLON { 1633 symtyp = FLABEL; 1634 named_label(getsym($1)); 1635 } 1636 | T_CASE constant_expr T_COLON { 1637 case_label($2); 1638 seen_fallthrough = true; 1639 } 1640 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1641 /* XXX: We don't fill all cases */ 1642 case_label($2); 1643 seen_fallthrough = true; 1644 } 1645 | T_DEFAULT T_COLON { 1646 default_label(); 1647 seen_fallthrough = true; 1648 } 1649 ; 1650 1651 compound_statement: /* C99 6.8.2 */ 1652 compound_statement_lbrace compound_statement_rbrace 1653 | compound_statement_lbrace block_item_list compound_statement_rbrace 1654 ; 1655 1656 compound_statement_lbrace: 1657 T_LBRACE { 1658 block_level++; 1659 mem_block_level++; 1660 begin_declaration_level(AUTO); 1661 } 1662 ; 1663 1664 compound_statement_rbrace: 1665 T_RBRACE { 1666 end_declaration_level(); 1667 freeblk(); 1668 mem_block_level--; 1669 block_level--; 1670 seen_fallthrough = false; 1671 } 1672 ; 1673 1674 block_item_list: /* C99 6.8.2 */ 1675 block_item 1676 | block_item_list block_item { 1677 if (!Sflag && $1 && !$2) 1678 /* declarations after statements is a C99 feature */ 1679 c99ism(327); 1680 $$ = $1 || $2; 1681 } 1682 ; 1683 1684 block_item: /* C99 6.8.2 */ 1685 declaration_or_error { 1686 $$ = false; 1687 restore_warning_flags(); 1688 } 1689 | statement { 1690 $$ = true; 1691 restore_warning_flags(); 1692 } 1693 ; 1694 1695 expression_statement: /* C99 6.8.3 */ 1696 expression T_SEMI { 1697 expr($1, false, false, false, false); 1698 seen_fallthrough = false; 1699 } 1700 | T_SEMI { 1701 seen_fallthrough = false; 1702 } 1703 ; 1704 1705 selection_statement: /* C99 6.8.4 */ 1706 if_without_else %prec T_THEN { 1707 save_warning_flags(); 1708 if2(); 1709 if3(false); 1710 } 1711 | if_without_else T_ELSE { 1712 save_warning_flags(); 1713 if2(); 1714 } statement { 1715 clear_warning_flags(); 1716 if3(true); 1717 } 1718 | if_without_else T_ELSE error { 1719 clear_warning_flags(); 1720 if3(false); 1721 } 1722 | switch_expr statement { 1723 clear_warning_flags(); 1724 switch2(); 1725 } 1726 | switch_expr error { 1727 clear_warning_flags(); 1728 switch2(); 1729 } 1730 ; 1731 1732 if_without_else: /* see C99 6.8.4 */ 1733 if_expr statement 1734 | if_expr error 1735 ; 1736 1737 if_expr: /* see C99 6.8.4 */ 1738 T_IF T_LPAREN expression T_RPAREN { 1739 if1($3); 1740 clear_warning_flags(); 1741 } 1742 ; 1743 1744 switch_expr: /* see C99 6.8.4 */ 1745 T_SWITCH T_LPAREN expression T_RPAREN { 1746 switch1($3); 1747 clear_warning_flags(); 1748 } 1749 ; 1750 1751 iteration_statement: /* C99 6.8.5 */ 1752 while_expr statement { 1753 clear_warning_flags(); 1754 while2(); 1755 } 1756 | while_expr error { 1757 clear_warning_flags(); 1758 while2(); 1759 } 1760 | do_statement do_while_expr { 1761 do2($2); 1762 seen_fallthrough = false; 1763 } 1764 | do error { 1765 clear_warning_flags(); 1766 do2(NULL); 1767 } 1768 | for_exprs statement { 1769 clear_warning_flags(); 1770 for2(); 1771 end_declaration_level(); 1772 block_level--; 1773 } 1774 | for_exprs error { 1775 clear_warning_flags(); 1776 for2(); 1777 end_declaration_level(); 1778 block_level--; 1779 } 1780 ; 1781 1782 while_expr: /* see C99 6.8.5 */ 1783 T_WHILE T_LPAREN expression T_RPAREN { 1784 while1($3); 1785 clear_warning_flags(); 1786 } 1787 ; 1788 1789 do_statement: /* see C99 6.8.5 */ 1790 do statement { 1791 clear_warning_flags(); 1792 } 1793 ; 1794 1795 do: /* see C99 6.8.5 */ 1796 T_DO { 1797 do1(); 1798 } 1799 ; 1800 1801 do_while_expr: /* see C99 6.8.5 */ 1802 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1803 $$ = $3; 1804 } 1805 ; 1806 1807 for_start: /* see C99 6.8.5 */ 1808 T_FOR T_LPAREN { 1809 begin_declaration_level(AUTO); 1810 block_level++; 1811 } 1812 ; 1813 1814 for_exprs: /* see C99 6.8.5 */ 1815 for_start 1816 begin_type_declaration_specifiers end_type 1817 notype_init_declarators T_SEMI 1818 expression_opt T_SEMI expression_opt T_RPAREN { 1819 /* variable declaration in for loop */ 1820 c99ism(325); 1821 for1(NULL, $6, $8); 1822 clear_warning_flags(); 1823 } 1824 | for_start 1825 expression_opt T_SEMI 1826 expression_opt T_SEMI 1827 expression_opt T_RPAREN { 1828 for1($2, $4, $6); 1829 clear_warning_flags(); 1830 } 1831 ; 1832 1833 jump_statement: /* C99 6.8.6 */ 1834 goto identifier T_SEMI { 1835 do_goto(getsym($2)); 1836 } 1837 | goto error T_SEMI { 1838 symtyp = FVFT; 1839 } 1840 | T_CONTINUE T_SEMI { 1841 do_continue(); 1842 } 1843 | T_BREAK T_SEMI { 1844 do_break(); 1845 } 1846 | T_RETURN T_SEMI { 1847 do_return(NULL); 1848 } 1849 | T_RETURN expression T_SEMI { 1850 do_return($2); 1851 } 1852 ; 1853 1854 goto: /* see C99 6.8.6 */ 1855 T_GOTO { 1856 symtyp = FLABEL; 1857 } 1858 ; 1859 1860 asm_statement: /* GCC extension */ 1861 T_ASM T_LPAREN read_until_rparen T_SEMI { 1862 setasm(); 1863 } 1864 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1865 setasm(); 1866 } 1867 | T_ASM error 1868 ; 1869 1870 read_until_rparen: /* helper for 'asm_statement' */ 1871 /* empty */ { 1872 read_until_rparen(); 1873 } 1874 ; 1875 1876 translation_unit: /* C99 6.9 */ 1877 external_declaration 1878 | translation_unit external_declaration 1879 ; 1880 1881 external_declaration: /* C99 6.9 */ 1882 function_definition { 1883 global_clean_up_decl(false); 1884 clear_warning_flags(); 1885 } 1886 | top_level_declaration { 1887 global_clean_up_decl(false); 1888 clear_warning_flags(); 1889 } 1890 | asm_statement /* GCC extension */ 1891 | T_SEMI { /* GCC extension */ 1892 if (sflag) { 1893 /* empty declaration */ 1894 error(0); 1895 } else if (!tflag) { 1896 /* empty declaration */ 1897 warning(0); 1898 } 1899 } 1900 ; 1901 1902 /* 1903 * On the top level, lint allows several forms of declarations that it doesn't 1904 * allow in functions. For example, a single ';' is an empty declaration and 1905 * is supported by some compilers, but in a function it would be an empty 1906 * statement, not a declaration. This makes a difference in C90 mode, where 1907 * a statement must not be followed by a declaration. 1908 * 1909 * See 'declaration' for all other declarations. 1910 */ 1911 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1912 begin_type end_type notype_init_declarators T_SEMI { 1913 if (sflag) { 1914 /* old style declaration; add 'int' */ 1915 error(1); 1916 } else if (!tflag) { 1917 /* old style declaration; add 'int' */ 1918 warning(1); 1919 } 1920 } 1921 | declaration 1922 | error T_SEMI { 1923 global_clean_up(); 1924 } 1925 | error T_RBRACE { 1926 global_clean_up(); 1927 } 1928 ; 1929 1930 function_definition: /* C99 6.9.1 */ 1931 func_declarator { 1932 if ($1->s_type->t_tspec != FUNC) { 1933 /* syntax error '%s' */ 1934 error(249, yytext); 1935 YYERROR; 1936 } 1937 if ($1->s_type->t_typedef) { 1938 /* ()-less function definition */ 1939 error(64); 1940 YYERROR; 1941 } 1942 funcdef($1); 1943 block_level++; 1944 begin_declaration_level(ARG); 1945 if (lwarn == LWARN_NONE) 1946 $1->s_used = true; 1947 } arg_declaration_list_opt { 1948 end_declaration_level(); 1949 block_level--; 1950 check_func_lint_directives(); 1951 check_func_old_style_arguments(); 1952 begin_control_statement(CS_FUNCTION_BODY); 1953 } compound_statement { 1954 funcend(); 1955 end_control_statement(CS_FUNCTION_BODY); 1956 } 1957 ; 1958 1959 func_declarator: 1960 begin_type end_type notype_declarator { 1961 /* ^^ There is no check for the missing type-specifier. */ 1962 $$ = $3; 1963 } 1964 | begin_type_declmods end_type notype_declarator { 1965 /* ^^ There is no check for the missing type-specifier. */ 1966 $$ = $3; 1967 } 1968 | begin_type_declaration_specifiers end_type type_declarator { 1969 $$ = $3; 1970 } 1971 ; 1972 1973 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1974 /* empty */ 1975 | arg_declaration_list 1976 ; 1977 1978 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 1979 arg_declaration 1980 | arg_declaration_list arg_declaration 1981 /* XXX or better "arg_declaration error" ? */ 1982 | error 1983 ; 1984 1985 /* 1986 * "arg_declaration" is separated from "declaration" because it 1987 * needs other error handling. 1988 */ 1989 arg_declaration: 1990 begin_type_declmods end_type T_SEMI { 1991 /* empty declaration */ 1992 warning(2); 1993 } 1994 | begin_type_declmods end_type notype_init_declarators T_SEMI 1995 | begin_type_declaration_specifiers end_type T_SEMI { 1996 if (!dcs->d_nonempty_decl) { 1997 /* empty declaration */ 1998 warning(2); 1999 } else { 2000 /* '%s' declared in argument declaration list */ 2001 warning(3, type_name(dcs->d_type)); 2002 } 2003 } 2004 | begin_type_declaration_specifiers end_type 2005 type_init_declarators T_SEMI { 2006 if (dcs->d_nonempty_decl) { 2007 /* '%s' declared in argument declaration list */ 2008 warning(3, type_name(dcs->d_type)); 2009 } 2010 } 2011 | begin_type_declmods error 2012 | begin_type_declaration_specifiers error 2013 ; 2014 2015 gcc_attribute_list_opt: 2016 /* empty */ 2017 | gcc_attribute_list 2018 ; 2019 2020 gcc_attribute_list: 2021 gcc_attribute 2022 | gcc_attribute_list gcc_attribute 2023 ; 2024 2025 gcc_attribute: 2026 T_ATTRIBUTE T_LPAREN T_LPAREN { 2027 attron = true; 2028 } gcc_attribute_spec_list { 2029 attron = false; 2030 } T_RPAREN T_RPAREN 2031 ; 2032 2033 gcc_attribute_spec_list: 2034 gcc_attribute_spec 2035 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2036 ; 2037 2038 gcc_attribute_spec: 2039 /* empty */ 2040 | T_AT_ALWAYS_INLINE 2041 | T_AT_ALIAS T_LPAREN string T_RPAREN 2042 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2043 | T_AT_ALIGNED 2044 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2045 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2046 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2047 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2048 | T_AT_COLD 2049 | T_AT_COMMON 2050 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2051 | T_AT_CONSTRUCTOR 2052 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2053 | T_AT_DEPRECATED 2054 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2055 | T_AT_DESTRUCTOR 2056 | T_AT_FALLTHROUGH { 2057 fallthru(1); 2058 } 2059 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2060 constant_expr T_COMMA constant_expr T_RPAREN 2061 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2062 | T_AT_GNU_INLINE 2063 | T_AT_HOT 2064 | T_AT_MALLOC 2065 | T_AT_MAY_ALIAS 2066 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2067 | T_AT_NOINLINE 2068 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2069 | T_AT_NONNULL 2070 | T_AT_NONSTRING 2071 | T_AT_NORETURN 2072 | T_AT_NOTHROW 2073 | T_AT_NO_INSTRUMENT_FUNCTION 2074 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2075 | T_AT_PACKED { 2076 addpacked(); 2077 } 2078 | T_AT_PCS T_LPAREN string T_RPAREN 2079 | T_AT_PURE 2080 | T_AT_RETURNS_NONNULL 2081 | T_AT_RETURNS_TWICE 2082 | T_AT_SECTION T_LPAREN string T_RPAREN 2083 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2084 | T_AT_SENTINEL 2085 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2086 | T_AT_TUNION 2087 | T_AT_UNUSED { 2088 add_attr_used(); 2089 } 2090 | T_AT_USED { 2091 add_attr_used(); 2092 } 2093 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2094 | T_AT_WARN_UNUSED_RESULT 2095 | T_AT_WEAK 2096 | T_QUAL { 2097 if ($1 != CONST) 2098 yyerror("Bad attribute"); 2099 } 2100 ; 2101 2102 gcc_attribute_bounded: 2103 T_AT_MINBYTES 2104 | T_AT_STRING 2105 | T_AT_BUFFER 2106 ; 2107 2108 gcc_attribute_format: 2109 T_AT_FORMAT_GNU_PRINTF 2110 | T_AT_FORMAT_PRINTF 2111 | T_AT_FORMAT_SCANF 2112 | T_AT_FORMAT_STRFMON 2113 | T_AT_FORMAT_STRFTIME 2114 | T_AT_FORMAT_SYSLOG 2115 ; 2116 2117 %% 2118 2119 /* ARGSUSED */ 2120 int 2121 yyerror(const char *msg) 2122 { 2123 /* syntax error '%s' */ 2124 error(249, yytext); 2125 if (++sytxerr >= 5) 2126 norecover(); 2127 return 0; 2128 } 2129 2130 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2131 || (defined(YYDEBUG) && defined(YYBISON)) 2132 static const char * 2133 cgram_to_string(int token, YYSTYPE val) 2134 { 2135 static const char *tqual_name[] = { 2136 "const", "volatile", "restrict", "_Thread_local" 2137 }; 2138 2139 switch (token) { 2140 case T_INCDEC: 2141 case T_MULTIPLICATIVE: 2142 case T_ADDITIVE: 2143 case T_SHIFT: 2144 case T_RELATIONAL: 2145 case T_EQUALITY: 2146 case T_OPASSIGN: 2147 return modtab[val.y_op].m_name; 2148 case T_SCLASS: 2149 return scl_name(val.y_scl); 2150 case T_TYPE: 2151 case T_STRUCT_OR_UNION: 2152 return tspec_name(val.y_tspec); 2153 case T_QUAL: 2154 return tqual_name[val.y_tqual]; 2155 case T_NAME: 2156 return val.y_name->sb_name; 2157 default: 2158 return "<none>"; 2159 } 2160 } 2161 #endif 2162 2163 #if defined(YYDEBUG) && defined(YYBISON) 2164 static void 2165 cgram_print(FILE *output, int token, YYSTYPE val) 2166 { 2167 fprintf(output, "%s", cgram_to_string(token, val)); 2168 } 2169 #endif 2170 2171 static void 2172 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2173 { 2174 declare(decl, initflg, renaming); 2175 if (renaming != NULL) 2176 freeyyv(&renaming, T_NAME); 2177 } 2178 2179 /* 2180 * Discard all input tokens up to and including the next 2181 * unmatched right paren 2182 */ 2183 static void 2184 read_until_rparen(void) 2185 { 2186 int level; 2187 2188 if (yychar < 0) 2189 yychar = yylex(); 2190 freeyyv(&yylval, yychar); 2191 2192 level = 1; 2193 while (yychar != T_RPAREN || --level > 0) { 2194 if (yychar == T_LPAREN) { 2195 level++; 2196 } else if (yychar <= 0) { 2197 break; 2198 } 2199 freeyyv(&yylval, yychar = yylex()); 2200 } 2201 2202 yyclearin; 2203 } 2204 2205 static sym_t * 2206 symbolrename(sym_t *s, sbuf_t *sb) 2207 { 2208 if (sb != NULL) 2209 s->s_rename = sb->sb_name; 2210 return s; 2211 } 2212
Indexes created Thu Oct 02 14:10:14 GMT 2025