cgram.y revision 1.365
1 %{ 2 /* $NetBSD: cgram.y,v 1.365 2021/09/17 20:17:30 christos 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 1.365 2021/09/17 20:17:30 christos Exp $"); 39 #endif 40 41 #include <limits.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "lint1.h" 46 47 extern char *yytext; 48 49 /* 50 * Contains the level of current declaration, used for symbol table entries. 51 * 0 is the top-level, > 0 is inside a function body. 52 */ 53 int block_level; 54 55 /* 56 * level for memory allocation. Normally the same as block_level. 57 * An exception is the declaration of arguments in prototypes. Memory 58 * for these can't be freed after the declaration, but symbols must 59 * be removed from the symbol table after the declaration. 60 */ 61 int mem_block_level; 62 63 /* 64 * Save the no-warns state and restore it to avoid the problem where 65 * if (expr) { stmt } / * NOLINT * / stmt; 66 */ 67 static int olwarn = LWARN_BAD; 68 69 static void cgram_declare(sym_t *, bool, sbuf_t *); 70 static void read_until_rparen(void); 71 static sym_t *symbolrename(sym_t *, sbuf_t *); 72 73 74 #ifdef DEBUG 75 static void 76 CLEAR_WARN_FLAGS(const char *file, size_t line) 77 { 78 debug_step("%s:%zu: clearing flags", file, line); 79 clear_warn_flags(); 80 olwarn = LWARN_BAD; 81 } 82 83 static void 84 SAVE_WARN_FLAGS(const char *file, size_t line) 85 { 86 lint_assert(olwarn == LWARN_BAD); 87 debug_step("%s:%zu: saving flags %d", file, line, lwarn); 88 olwarn = lwarn; 89 } 90 91 static void 92 RESTORE_WARN_FLAGS(const char *file, size_t line) 93 { 94 if (olwarn != LWARN_BAD) { 95 lwarn = olwarn; 96 debug_step("%s:%zu: restoring flags %d", file, line, lwarn); 97 olwarn = LWARN_BAD; 98 } else 99 CLEAR_WARN_FLAGS(file, line); 100 } 101 #else 102 #define CLEAR_WARN_FLAGS(f, l) clear_warn_flags(), olwarn = LWARN_BAD 103 #define SAVE_WARN_FLAGS(f, l) olwarn = lwarn 104 #define RESTORE_WARN_FLAGS(f, l) \ 105 (void)(olwarn == LWARN_BAD ? (clear_warn_flags(), 0) : (lwarn = olwarn)) 106 #endif 107 108 #define clear_warning_flags() CLEAR_WARN_FLAGS(__FILE__, __LINE__) 109 #define save_warning_flags() SAVE_WARN_FLAGS(__FILE__, __LINE__) 110 #define restore_warning_flags() RESTORE_WARN_FLAGS(__FILE__, __LINE__) 111 112 /* unbind the anonymous struct members from the struct */ 113 static void 114 anonymize(sym_t *s) 115 { 116 for ( ; s != NULL; s = s->s_next) 117 s->s_styp = NULL; 118 } 119 120 #if defined(YYDEBUG) && (defined(YYBYACC) || defined(YYBISON)) 121 #define YYSTYPE_TOSTRING cgram_to_string 122 #endif 123 #if defined(YYDEBUG) && defined(YYBISON) 124 #define YYPRINT cgram_print 125 #endif 126 127 %} 128 129 %expect 150 130 131 %union { 132 val_t *y_val; 133 sbuf_t *y_name; 134 sym_t *y_sym; 135 op_t y_op; 136 scl_t y_scl; 137 tspec_t y_tspec; 138 tqual_t y_tqual; 139 type_t *y_type; 140 tnode_t *y_tnode; 141 range_t y_range; 142 strg_t *y_string; 143 qual_ptr *y_qual_ptr; 144 bool y_seen_statement; 145 struct generic_association *y_generic; 146 struct array_size y_array_size; 147 }; 148 149 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 150 %token T_POINT T_ARROW 151 %token T_COMPLEMENT T_LOGNOT 152 %token <y_op> T_INCDEC 153 %token T_SIZEOF 154 %token T_BUILTIN_OFFSETOF 155 %token T_TYPEOF 156 %token T_EXTENSION 157 %token T_ALIGNAS 158 %token T_ALIGNOF 159 %token T_ASTERISK 160 %token <y_op> T_MULTIPLICATIVE 161 %token <y_op> T_ADDITIVE 162 %token <y_op> T_SHIFT 163 %token <y_op> T_RELATIONAL 164 %token <y_op> T_EQUALITY 165 %token T_AMPER 166 %token T_BITXOR 167 %token T_BITOR 168 %token T_LOGAND 169 %token T_LOGOR 170 %token T_QUEST 171 %token T_COLON 172 %token T_ASSIGN 173 %token <y_op> T_OPASSIGN 174 %token T_COMMA 175 %token T_SEMI 176 %token T_ELLIPSIS 177 %token T_REAL 178 %token T_IMAG 179 %token T_GENERIC 180 %token T_NORETURN 181 182 /* storage classes (extern, static, auto, register and typedef) */ 183 %token <y_scl> T_SCLASS 184 185 /* 186 * predefined type keywords (char, int, short, long, unsigned, signed, 187 * float, double, void); see T_TYPENAME for types from typedef 188 */ 189 %token <y_tspec> T_TYPE 190 191 /* qualifiers (const, volatile, restrict, _Thread_local) */ 192 %token <y_tqual> T_QUAL 193 194 /* struct or union */ 195 %token <y_tspec> T_STRUCT_OR_UNION 196 197 /* remaining keywords */ 198 %token T_ASM 199 %token T_BREAK 200 %token T_CASE 201 %token T_CONTINUE 202 %token T_DEFAULT 203 %token T_DO 204 %token T_ELSE 205 %token T_ENUM 206 %token T_FOR 207 %token T_GOTO 208 %token T_IF 209 %token T_PACKED 210 %token T_RETURN 211 %token T_SWITCH 212 %token T_SYMBOLRENAME 213 %token T_WHILE 214 %token T_STATIC_ASSERT 215 216 %token T_ATTRIBUTE 217 %token T_AT_ALIAS 218 %token T_AT_ALIGNED 219 %token T_AT_ALLOC_SIZE 220 %token T_AT_ALWAYS_INLINE 221 %token T_AT_BOUNDED 222 %token T_AT_BUFFER 223 %token T_AT_COLD 224 %token T_AT_COMMON 225 %token T_AT_CONSTRUCTOR 226 %token T_AT_DEPRECATED 227 %token T_AT_DESTRUCTOR 228 %token T_AT_FALLTHROUGH 229 %token T_AT_FORMAT 230 %token T_AT_FORMAT_ARG 231 %token T_AT_FORMAT_GNU_PRINTF 232 %token T_AT_FORMAT_PRINTF 233 %token T_AT_FORMAT_SCANF 234 %token T_AT_FORMAT_STRFMON 235 %token T_AT_FORMAT_STRFTIME 236 %token T_AT_FORMAT_SYSLOG 237 %token T_AT_GNU_INLINE 238 %token T_AT_HOT 239 %token T_AT_MALLOC 240 %token T_AT_MAY_ALIAS 241 %token T_AT_MINBYTES 242 %token T_AT_MODE 243 %token T_AT_NOINLINE 244 %token T_AT_NONNULL 245 %token T_AT_NONSTRING 246 %token T_AT_NORETURN 247 %token T_AT_NOTHROW 248 %token T_AT_NO_INSTRUMENT_FUNCTION 249 %token T_AT_OPTIMIZE 250 %token T_AT_PACKED 251 %token T_AT_PCS 252 %token T_AT_PURE 253 %token T_AT_REGPARM 254 %token T_AT_RETURNS_NONNULL 255 %token T_AT_RETURNS_TWICE 256 %token T_AT_SECTION 257 %token T_AT_SENTINEL 258 %token T_AT_STRING 259 %token T_AT_TLS_MODEL 260 %token T_AT_TUNION 261 %token T_AT_UNUSED 262 %token T_AT_USED 263 %token T_AT_VISIBILITY 264 %token T_AT_WARN_UNUSED_RESULT 265 %token T_AT_WEAK 266 267 %left T_THEN 268 %left T_ELSE 269 %right T_QUEST T_COLON 270 %left T_LOGOR 271 %left T_LOGAND 272 %left T_BITOR 273 %left T_BITXOR 274 %left T_AMPER 275 %left T_EQUALITY 276 %left T_RELATIONAL 277 %left T_SHIFT 278 %left T_ADDITIVE 279 %left T_ASTERISK T_MULTIPLICATIVE 280 281 %token <y_name> T_NAME 282 %token <y_name> T_TYPENAME 283 %token <y_val> T_CON 284 %token <y_string> T_STRING 285 286 %type <y_sym> identifier_sym 287 %type <y_name> identifier 288 %type <y_string> string 289 %type <y_string> string2 290 291 %type <y_tnode> primary_expression 292 %type <y_tnode> generic_selection 293 %type <y_generic> generic_assoc_list 294 %type <y_generic> generic_association 295 %type <y_tnode> postfix_expression 296 %type <y_tnode> gcc_statement_expr_list 297 %type <y_tnode> gcc_statement_expr_item 298 %type <y_op> point_or_arrow 299 %type <y_tnode> argument_expression_list 300 %type <y_tnode> unary_expression 301 %type <y_tnode> cast_expression 302 %type <y_tnode> conditional_expression 303 %type <y_tnode> assignment_expression 304 %type <y_tnode> expression_opt 305 %type <y_tnode> expression 306 %type <y_tnode> constant_expr 307 308 %type <y_type> begin_type_typespec 309 %type <y_type> type_specifier 310 %type <y_type> notype_type_specifier 311 %type <y_type> struct_or_union_specifier 312 %type <y_tspec> struct_or_union 313 %type <y_sym> braced_struct_declaration_list 314 %type <y_sym> struct_declaration_list_with_rbrace 315 %type <y_sym> struct_declaration_list 316 %type <y_sym> struct_declaration 317 %type <y_sym> notype_struct_declarators 318 %type <y_sym> type_struct_declarators 319 %type <y_sym> notype_struct_declarator 320 %type <y_sym> type_struct_declarator 321 %type <y_type> enum_specifier 322 %type <y_sym> enum_declaration 323 %type <y_sym> enums_with_opt_comma 324 %type <y_sym> enumerator_list 325 %type <y_sym> enumerator 326 %type <y_qual_ptr> type_qualifier 327 %type <y_qual_ptr> pointer 328 %type <y_qual_ptr> asterisk 329 %type <y_qual_ptr> type_qualifier_list_opt 330 %type <y_qual_ptr> type_qualifier_list 331 %type <y_sym> notype_declarator 332 %type <y_sym> type_declarator 333 %type <y_sym> notype_direct_declarator 334 %type <y_sym> type_direct_declarator 335 %type <y_sym> type_param_declarator 336 %type <y_sym> notype_param_declarator 337 %type <y_sym> direct_param_declarator 338 %type <y_sym> direct_notype_param_declarator 339 %type <y_sym> param_list 340 %type <y_array_size> array_size_opt 341 %type <y_tnode> array_size 342 %type <y_sym> identifier_list 343 %type <y_type> type_name 344 %type <y_sym> abstract_declaration 345 %type <y_sym> abstract_declarator 346 %type <y_sym> direct_abstract_declarator 347 %type <y_sym> abstract_decl_param_list 348 %type <y_sym> vararg_parameter_type_list 349 %type <y_sym> parameter_type_list 350 %type <y_sym> parameter_declaration 351 %type <y_range> range 352 %type <y_name> asm_or_symbolrename_opt 353 354 %type <y_seen_statement> block_item_list 355 %type <y_seen_statement> block_item 356 %type <y_tnode> do_while_expr 357 %type <y_sym> func_declarator 358 359 %{ 360 #if defined(YYDEBUG) && defined(YYBISON) 361 static void cgram_print(FILE *, int, YYSTYPE); 362 #endif 363 %} 364 365 %% 366 367 program: 368 /* empty */ { 369 if (sflag) { 370 /* empty translation unit */ 371 error(272); 372 } else if (!tflag) { 373 /* empty translation unit */ 374 warning(272); 375 } 376 } 377 | translation_unit 378 ; 379 380 identifier_sym: /* helper for struct/union/enum */ 381 identifier { 382 $$ = getsym($1); 383 } 384 ; 385 386 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 387 identifier: 388 T_NAME { 389 debug_step("cgram: name '%s'", $1->sb_name); 390 $$ = $1; 391 } 392 | T_TYPENAME { 393 debug_step("cgram: typename '%s'", $1->sb_name); 394 $$ = $1; 395 } 396 ; 397 398 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 399 string: 400 T_STRING 401 | T_STRING string2 { 402 $$ = cat_strings($1, $2); 403 } 404 ; 405 406 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 407 string2: 408 T_STRING { 409 if (tflag) { 410 /* concatenated strings are illegal in traditional C */ 411 warning(219); 412 } 413 $$ = $1; 414 } 415 | string2 T_STRING { 416 $$ = cat_strings($1, $2); 417 } 418 ; 419 420 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 421 primary_expression: 422 T_NAME { 423 /* XXX really necessary? */ 424 if (yychar < 0) 425 yychar = yylex(); 426 $$ = build_name(getsym($1), yychar); 427 } 428 | T_CON { 429 $$ = build_constant(gettyp($1->v_tspec), $1); 430 } 431 | string { 432 $$ = build_string($1); 433 } 434 | T_LPAREN expression T_RPAREN { 435 if ($2 != NULL) 436 $2->tn_parenthesized = true; 437 $$ = $2; 438 } 439 | generic_selection 440 /* GCC primary-expression, see c_parser_postfix_expression */ 441 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 442 symtyp = FMEMBER; 443 $$ = build_offsetof($3, getsym($5)); 444 } 445 ; 446 447 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 448 generic_selection: 449 T_GENERIC T_LPAREN assignment_expression T_COMMA 450 generic_assoc_list T_RPAREN { 451 /* generic selection requires C11 or later */ 452 c11ism(345); 453 $$ = build_generic_selection($3, $5); 454 } 455 ; 456 457 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 458 generic_assoc_list: 459 generic_association 460 | generic_assoc_list T_COMMA generic_association { 461 $3->ga_prev = $1; 462 $$ = $3; 463 } 464 ; 465 466 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 467 generic_association: 468 type_name T_COLON assignment_expression { 469 $$ = getblk(sizeof(*$$)); 470 $$->ga_arg = $1; 471 $$->ga_result = $3; 472 } 473 | T_DEFAULT T_COLON assignment_expression { 474 $$ = getblk(sizeof(*$$)); 475 $$->ga_arg = NULL; 476 $$->ga_result = $3; 477 } 478 ; 479 480 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 481 postfix_expression: 482 primary_expression 483 | postfix_expression T_LBRACK expression T_RBRACK { 484 $$ = build_unary(INDIR, build_binary($1, PLUS, $3)); 485 } 486 | postfix_expression T_LPAREN T_RPAREN { 487 $$ = build_function_call($1, NULL); 488 } 489 | postfix_expression T_LPAREN argument_expression_list T_RPAREN { 490 $$ = build_function_call($1, $3); 491 } 492 | postfix_expression point_or_arrow T_NAME { 493 $$ = build_member_access($1, $2, $3); 494 } 495 | postfix_expression T_INCDEC { 496 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $1); 497 } 498 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 499 sym_t *tmp = mktempsym($2); 500 begin_initialization(tmp); 501 cgram_declare(tmp, true, NULL); 502 } init_lbrace initializer_list comma_opt init_rbrace { 503 if (!Sflag) 504 /* compound literals are a C9X/GCC extension */ 505 gnuism(319); 506 $$ = build_name(*current_initsym(), 0); 507 end_initialization(); 508 } 509 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 510 block_level--; 511 mem_block_level--; 512 begin_initialization(mktempsym(dup_type($3->tn_type))); 513 mem_block_level++; 514 block_level++; 515 /* ({ }) is a GCC extension */ 516 gnuism(320); 517 } compound_statement_rbrace T_RPAREN { 518 $$ = build_name(*current_initsym(), 0); 519 end_initialization(); 520 } 521 ; 522 523 comma_opt: /* helper for 'postfix_expression' */ 524 /* empty */ 525 | T_COMMA 526 ; 527 528 /* 529 * The inner part of a GCC statement-expression of the form ({ ... }). 530 * 531 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 532 */ 533 gcc_statement_expr_list: 534 gcc_statement_expr_item 535 | gcc_statement_expr_list gcc_statement_expr_item { 536 $$ = $2; 537 } 538 ; 539 540 gcc_statement_expr_item: 541 declaration_or_error { 542 clear_warning_flags(); 543 $$ = NULL; 544 } 545 | non_expr_statement { 546 $$ = expr_zalloc_tnode(); 547 $$->tn_type = gettyp(VOID); 548 } 549 | expression T_SEMI { 550 if ($1 == NULL) { /* in case of syntax errors */ 551 $$ = expr_zalloc_tnode(); 552 $$->tn_type = gettyp(VOID); 553 } else { 554 /* XXX: do that only on the last name */ 555 if ($1->tn_op == NAME) 556 $1->tn_sym->s_used = true; 557 expr($1, false, false, false, false); 558 seen_fallthrough = false; 559 $$ = $1; 560 } 561 } 562 ; 563 564 point_or_arrow: /* helper for 'postfix_expression' */ 565 T_POINT { 566 symtyp = FMEMBER; 567 $$ = POINT; 568 } 569 | T_ARROW { 570 symtyp = FMEMBER; 571 $$ = ARROW; 572 } 573 ; 574 575 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 576 argument_expression_list: 577 assignment_expression { 578 $$ = build_function_argument(NULL, $1); 579 } 580 | argument_expression_list T_COMMA assignment_expression { 581 $$ = build_function_argument($1, $3); 582 } 583 ; 584 585 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 586 unary_expression: 587 postfix_expression 588 | T_INCDEC unary_expression { 589 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2); 590 } 591 | T_AMPER cast_expression { 592 $$ = build_unary(ADDR, $2); 593 } 594 | T_ASTERISK cast_expression { 595 $$ = build_unary(INDIR, $2); 596 } 597 | T_ADDITIVE cast_expression { 598 if (tflag && $1 == PLUS) { 599 /* unary + is illegal in traditional C */ 600 warning(100); 601 } 602 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2); 603 } 604 | T_COMPLEMENT cast_expression { 605 $$ = build_unary(COMPL, $2); 606 } 607 | T_LOGNOT cast_expression { 608 $$ = build_unary(NOT, $2); 609 } 610 | T_REAL cast_expression { /* GCC c_parser_unary_expression */ 611 $$ = build_unary(REAL, $2); 612 } 613 | T_IMAG cast_expression { /* GCC c_parser_unary_expression */ 614 $$ = build_unary(IMAG, $2); 615 } 616 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 617 $$ = $2; 618 } 619 | T_SIZEOF unary_expression { 620 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 621 if ($$ != NULL) 622 check_expr_misc($2, 623 false, false, false, false, false, true); 624 } 625 | T_SIZEOF T_LPAREN type_name T_RPAREN { 626 $$ = build_sizeof($3); 627 } 628 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 629 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 630 /* TODO: c11ism */ 631 $$ = build_alignof($3); 632 } 633 ; 634 635 /* The rule 'unary_operator' is inlined into unary_expression. */ 636 637 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 638 cast_expression: 639 unary_expression 640 | T_LPAREN type_name T_RPAREN cast_expression { 641 $$ = cast($4, $2); 642 } 643 ; 644 645 expression_opt: 646 /* empty */ { 647 $$ = NULL; 648 } 649 | expression 650 ; 651 652 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 653 /* 'conditional_expression' also implements 'additive_expression'. */ 654 /* 'conditional_expression' also implements 'shift_expression'. */ 655 /* 'conditional_expression' also implements 'relational_expression'. */ 656 /* 'conditional_expression' also implements 'equality_expression'. */ 657 /* 'conditional_expression' also implements 'AND_expression'. */ 658 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 659 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 660 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 661 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 662 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 663 conditional_expression: 664 cast_expression 665 | conditional_expression T_ASTERISK conditional_expression { 666 $$ = build_binary($1, MULT, $3); 667 } 668 | conditional_expression T_MULTIPLICATIVE conditional_expression { 669 $$ = build_binary($1, $2, $3); 670 } 671 | conditional_expression T_ADDITIVE conditional_expression { 672 $$ = build_binary($1, $2, $3); 673 } 674 | conditional_expression T_SHIFT conditional_expression { 675 $$ = build_binary($1, $2, $3); 676 } 677 | conditional_expression T_RELATIONAL conditional_expression { 678 $$ = build_binary($1, $2, $3); 679 } 680 | conditional_expression T_EQUALITY conditional_expression { 681 $$ = build_binary($1, $2, $3); 682 } 683 | conditional_expression T_AMPER conditional_expression { 684 $$ = build_binary($1, BITAND, $3); 685 } 686 | conditional_expression T_BITXOR conditional_expression { 687 $$ = build_binary($1, BITXOR, $3); 688 } 689 | conditional_expression T_BITOR conditional_expression { 690 $$ = build_binary($1, BITOR, $3); 691 } 692 | conditional_expression T_LOGAND conditional_expression { 693 $$ = build_binary($1, LOGAND, $3); 694 } 695 | conditional_expression T_LOGOR conditional_expression { 696 $$ = build_binary($1, LOGOR, $3); 697 } 698 | conditional_expression T_QUEST expression 699 T_COLON conditional_expression { 700 $$ = build_binary($1, QUEST, build_binary($3, COLON, $5)); 701 } 702 ; 703 704 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 705 assignment_expression: 706 conditional_expression 707 | unary_expression T_ASSIGN assignment_expression { 708 $$ = build_binary($1, ASSIGN, $3); 709 } 710 | unary_expression T_OPASSIGN assignment_expression { 711 $$ = build_binary($1, $2, $3); 712 } 713 ; 714 715 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 716 expression: 717 assignment_expression 718 | expression T_COMMA assignment_expression { 719 $$ = build_binary($1, COMMA, $3); 720 } 721 ; 722 723 constant_expr_list_opt: /* helper for gcc_attribute */ 724 /* empty */ 725 | constant_expr_list 726 ; 727 728 constant_expr_list: /* helper for gcc_attribute */ 729 constant_expr 730 | constant_expr_list T_COMMA constant_expr 731 ; 732 733 constant_expr: /* C99 6.6 */ 734 conditional_expression 735 ; 736 737 declaration_or_error: 738 declaration 739 | error T_SEMI 740 ; 741 742 declaration: /* C99 6.7 */ 743 begin_type_declmods end_type T_SEMI { 744 if (dcs->d_scl == TYPEDEF) { 745 /* typedef declares no type name */ 746 warning(72); 747 } else { 748 /* empty declaration */ 749 warning(2); 750 } 751 } 752 | begin_type_declmods end_type notype_init_declarators T_SEMI 753 /* ^^ There is no check for the missing type-specifier. */ 754 | begin_type_declaration_specifiers end_type T_SEMI { 755 if (dcs->d_scl == TYPEDEF) { 756 /* typedef declares no type name */ 757 warning(72); 758 } else if (!dcs->d_nonempty_decl) { 759 /* empty declaration */ 760 warning(2); 761 } 762 } 763 | begin_type_declaration_specifiers end_type 764 type_init_declarators T_SEMI 765 | static_assert_declaration 766 ; 767 768 begin_type_declaration_specifiers: /* see C99 6.7 */ 769 begin_type_typespec { 770 add_type($1); 771 } 772 | begin_type_declmods type_specifier { 773 add_type($2); 774 } 775 | type_attribute begin_type_declaration_specifiers 776 | begin_type_declaration_specifiers declmod 777 | begin_type_declaration_specifiers notype_type_specifier { 778 add_type($2); 779 } 780 ; 781 782 begin_type_declmods: /* see C99 6.7 */ 783 begin_type T_QUAL { 784 add_qualifier($2); 785 } 786 | begin_type T_SCLASS { 787 add_storage_class($2); 788 } 789 | begin_type_declmods declmod 790 ; 791 792 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 793 begin_type_specifier_qualifier_list_postfix 794 | type_attribute_list begin_type_specifier_qualifier_list_postfix 795 ; 796 797 begin_type_specifier_qualifier_list_postfix: 798 begin_type_typespec { 799 add_type($1); 800 } 801 | begin_type_qualifier_list type_specifier { 802 add_type($2); 803 } 804 | begin_type_specifier_qualifier_list_postfix T_QUAL { 805 add_qualifier($2); 806 } 807 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 808 add_type($2); 809 } 810 | begin_type_specifier_qualifier_list_postfix type_attribute 811 ; 812 813 begin_type_typespec: 814 begin_type notype_type_specifier { 815 $$ = $2; 816 } 817 | T_TYPENAME begin_type { 818 $$ = getsym($1)->s_type; 819 } 820 ; 821 822 begin_type_qualifier_list: 823 begin_type T_QUAL { 824 add_qualifier($2); 825 } 826 | begin_type_qualifier_list T_QUAL { 827 add_qualifier($2); 828 } 829 ; 830 831 declmod: 832 T_QUAL { 833 add_qualifier($1); 834 } 835 | T_SCLASS { 836 add_storage_class($1); 837 } 838 | type_attribute_list 839 ; 840 841 type_attribute_list: 842 type_attribute 843 | type_attribute_list type_attribute 844 ; 845 846 type_attribute_opt: 847 /* empty */ 848 | type_attribute 849 ; 850 851 type_attribute: /* See C11 6.7 declaration-specifiers */ 852 gcc_attribute 853 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 854 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 855 | T_PACKED { 856 addpacked(); 857 } 858 | T_NORETURN 859 ; 860 861 begin_type: 862 /* empty */ { 863 begin_type(); 864 } 865 ; 866 867 end_type: 868 /* empty */ { 869 end_type(); 870 } 871 ; 872 873 type_specifier: /* C99 6.7.2 */ 874 notype_type_specifier 875 | T_TYPENAME { 876 $$ = getsym($1)->s_type; 877 } 878 ; 879 880 notype_type_specifier: /* see C99 6.7.2 */ 881 T_TYPE { 882 $$ = gettyp($1); 883 } 884 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 885 $$ = $3->tn_type; 886 } 887 | struct_or_union_specifier { 888 end_declaration_level(); 889 $$ = $1; 890 } 891 | enum_specifier { 892 end_declaration_level(); 893 $$ = $1; 894 } 895 ; 896 897 struct_or_union_specifier: /* C99 6.7.2.1 */ 898 struct_or_union identifier_sym { 899 /* 900 * STDC requires that "struct a;" always introduces 901 * a new tag if "a" is not declared at current level 902 * 903 * yychar is valid because otherwise the parser would not 904 * have been able to decide if it must shift or reduce 905 */ 906 $$ = mktag($2, $1, false, yychar == T_SEMI); 907 } 908 | struct_or_union identifier_sym { 909 dcs->d_tagtyp = mktag($2, $1, true, false); 910 } braced_struct_declaration_list { 911 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 912 } 913 | struct_or_union { 914 dcs->d_tagtyp = mktag(NULL, $1, true, false); 915 } braced_struct_declaration_list { 916 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 917 } 918 | struct_or_union error { 919 symtyp = FVFT; 920 $$ = gettyp(INT); 921 } 922 ; 923 924 struct_or_union: /* C99 6.7.2.1 */ 925 T_STRUCT_OR_UNION { 926 symtyp = FTAG; 927 begin_declaration_level($1 == STRUCT ? MOS : MOU); 928 dcs->d_offset = 0; 929 dcs->d_sou_align_in_bits = CHAR_SIZE; 930 $$ = $1; 931 } 932 | struct_or_union type_attribute 933 ; 934 935 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 936 struct_declaration_lbrace struct_declaration_list_with_rbrace { 937 $$ = $2; 938 } 939 ; 940 941 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 942 T_LBRACE { 943 symtyp = FVFT; 944 } 945 ; 946 947 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 948 struct_declaration_list T_RBRACE 949 | T_RBRACE { 950 /* XXX: This is not allowed by any C standard. */ 951 $$ = NULL; 952 } 953 ; 954 955 struct_declaration_list: /* C99 6.7.2.1 */ 956 struct_declaration 957 | struct_declaration_list struct_declaration { 958 $$ = lnklst($1, $2); 959 } 960 ; 961 962 struct_declaration: /* C99 6.7.2.1 */ 963 begin_type_qualifier_list end_type { 964 /* ^^ There is no check for the missing type-specifier. */ 965 /* too late, i know, but getsym() compensates it */ 966 symtyp = FMEMBER; 967 } notype_struct_declarators type_attribute_opt T_SEMI { 968 symtyp = FVFT; 969 $$ = $4; 970 } 971 | begin_type_specifier_qualifier_list end_type { 972 symtyp = FMEMBER; 973 } type_struct_declarators type_attribute_opt T_SEMI { 974 symtyp = FVFT; 975 $$ = $4; 976 } 977 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 978 /* syntax error '%s' */ 979 error(249, "member without type"); 980 $$ = NULL; 981 } 982 | begin_type_specifier_qualifier_list end_type type_attribute_opt 983 T_SEMI { 984 symtyp = FVFT; 985 if (!Sflag) 986 /* anonymous struct/union members is a C9X feature */ 987 warning(49); 988 if (is_struct_or_union(dcs->d_type->t_tspec)) { 989 $$ = dcs->d_type->t_str->sou_first_member; 990 /* add all the members of the anonymous struct/union */ 991 anonymize($$); 992 } else { 993 /* syntax error '%s' */ 994 error(249, "unnamed member"); 995 $$ = NULL; 996 } 997 } 998 | static_assert_declaration 999 | error T_SEMI { 1000 symtyp = FVFT; 1001 $$ = NULL; 1002 } 1003 ; 1004 1005 notype_struct_declarators: 1006 notype_struct_declarator { 1007 $$ = declarator_1_struct_union($1); 1008 } 1009 | notype_struct_declarators { 1010 symtyp = FMEMBER; 1011 } T_COMMA type_struct_declarator { 1012 $$ = lnklst($1, declarator_1_struct_union($4)); 1013 } 1014 ; 1015 1016 type_struct_declarators: 1017 type_struct_declarator { 1018 $$ = declarator_1_struct_union($1); 1019 } 1020 | type_struct_declarators { 1021 symtyp = FMEMBER; 1022 } T_COMMA type_struct_declarator { 1023 $$ = lnklst($1, declarator_1_struct_union($4)); 1024 } 1025 ; 1026 1027 notype_struct_declarator: 1028 notype_declarator 1029 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1030 $$ = bitfield($1, to_int_constant($3, true)); 1031 } 1032 | { 1033 symtyp = FVFT; 1034 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1035 $$ = bitfield(NULL, to_int_constant($3, true)); 1036 } 1037 ; 1038 1039 type_struct_declarator: 1040 type_declarator 1041 | type_declarator T_COLON constant_expr { 1042 $$ = bitfield($1, to_int_constant($3, true)); 1043 } 1044 | { 1045 symtyp = FVFT; 1046 } T_COLON constant_expr { 1047 $$ = bitfield(NULL, to_int_constant($3, true)); 1048 } 1049 ; 1050 1051 enum_specifier: /* C99 6.7.2.2 */ 1052 enum gcc_attribute_list_opt identifier_sym { 1053 $$ = mktag($3, ENUM, false, false); 1054 } 1055 | enum gcc_attribute_list_opt identifier_sym { 1056 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1057 } enum_declaration /*gcc_attribute_list_opt*/ { 1058 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1059 } 1060 | enum gcc_attribute_list_opt { 1061 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1062 } enum_declaration /*gcc_attribute_list_opt*/ { 1063 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1064 } 1065 | enum error { 1066 symtyp = FVFT; 1067 $$ = gettyp(INT); 1068 } 1069 ; 1070 1071 enum: /* helper for C99 6.7.2.2 */ 1072 T_ENUM { 1073 symtyp = FTAG; 1074 begin_declaration_level(CTCONST); 1075 } 1076 ; 1077 1078 enum_declaration: /* helper for C99 6.7.2.2 */ 1079 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1080 $$ = $2; 1081 } 1082 ; 1083 1084 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1085 T_LBRACE { 1086 symtyp = FVFT; 1087 enumval = 0; 1088 } 1089 ; 1090 1091 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1092 enumerator_list 1093 | enumerator_list T_COMMA { 1094 if (sflag) { 1095 /* trailing ',' prohibited in enum declaration */ 1096 error(54); 1097 } else { 1098 /* trailing ',' prohibited in enum declaration */ 1099 c99ism(54); 1100 } 1101 $$ = $1; 1102 } 1103 ; 1104 1105 enumerator_list: /* C99 6.7.2.2 */ 1106 enumerator 1107 | enumerator_list T_COMMA enumerator { 1108 $$ = lnklst($1, $3); 1109 } 1110 | error { 1111 $$ = NULL; 1112 } 1113 ; 1114 1115 enumerator: /* C99 6.7.2.2 */ 1116 identifier_sym gcc_attribute_list_opt { 1117 $$ = enumeration_constant($1, enumval, true); 1118 } 1119 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1120 $$ = enumeration_constant($1, to_int_constant($4, true), 1121 false); 1122 } 1123 ; 1124 1125 type_qualifier: /* C99 6.7.3 */ 1126 T_QUAL { 1127 $$ = xcalloc(1, sizeof(*$$)); 1128 if ($1 == CONST) 1129 $$->p_const = true; 1130 if ($1 == VOLATILE) 1131 $$->p_volatile = true; 1132 } 1133 ; 1134 1135 pointer: /* C99 6.7.5 */ 1136 asterisk type_qualifier_list_opt { 1137 $$ = merge_qualified_pointer($1, $2); 1138 } 1139 | asterisk type_qualifier_list_opt pointer { 1140 $$ = merge_qualified_pointer($1, $2); 1141 $$ = merge_qualified_pointer($$, $3); 1142 } 1143 ; 1144 1145 asterisk: /* helper for 'pointer' */ 1146 T_ASTERISK { 1147 $$ = xcalloc(1, sizeof(*$$)); 1148 $$->p_pointer = true; 1149 } 1150 ; 1151 1152 type_qualifier_list_opt: /* see C99 6.7.5 */ 1153 /* empty */ { 1154 $$ = NULL; 1155 } 1156 | type_qualifier_list 1157 ; 1158 1159 type_qualifier_list: /* C99 6.7.5 */ 1160 type_qualifier 1161 | type_qualifier_list type_qualifier { 1162 $$ = merge_qualified_pointer($1, $2); 1163 } 1164 ; 1165 1166 /* 1167 * For an explanation of 'notype' in the following rules, see 1168 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1169 */ 1170 1171 notype_init_declarators: 1172 notype_init_declarator 1173 | notype_init_declarators T_COMMA type_init_declarator 1174 ; 1175 1176 type_init_declarators: 1177 type_init_declarator 1178 | type_init_declarators T_COMMA type_init_declarator 1179 ; 1180 1181 notype_init_declarator: 1182 notype_declarator asm_or_symbolrename_opt { 1183 cgram_declare($1, false, $2); 1184 check_size($1); 1185 } 1186 | notype_declarator asm_or_symbolrename_opt { 1187 begin_initialization($1); 1188 cgram_declare($1, true, $2); 1189 } T_ASSIGN initializer { 1190 check_size($1); 1191 end_initialization(); 1192 } 1193 ; 1194 1195 type_init_declarator: 1196 type_declarator asm_or_symbolrename_opt { 1197 cgram_declare($1, false, $2); 1198 check_size($1); 1199 } 1200 | type_declarator asm_or_symbolrename_opt { 1201 begin_initialization($1); 1202 cgram_declare($1, true, $2); 1203 } T_ASSIGN initializer { 1204 check_size($1); 1205 end_initialization(); 1206 } 1207 ; 1208 1209 notype_declarator: 1210 notype_direct_declarator 1211 | pointer notype_direct_declarator { 1212 $$ = add_pointer($2, $1); 1213 } 1214 ; 1215 1216 type_declarator: 1217 type_direct_declarator 1218 | pointer type_direct_declarator { 1219 $$ = add_pointer($2, $1); 1220 } 1221 ; 1222 1223 notype_direct_declarator: 1224 T_NAME { 1225 $$ = declarator_name(getsym($1)); 1226 } 1227 | T_LPAREN type_declarator T_RPAREN { 1228 $$ = $2; 1229 } 1230 | type_attribute notype_direct_declarator { 1231 $$ = $2; 1232 } 1233 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1234 $$ = add_array($1, $3.has_dim, $3.dim); 1235 } 1236 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1237 $$ = add_function(symbolrename($1, $3), $2); 1238 end_declaration_level(); 1239 block_level--; 1240 } 1241 | notype_direct_declarator type_attribute 1242 ; 1243 1244 type_direct_declarator: 1245 identifier { 1246 $$ = declarator_name(getsym($1)); 1247 } 1248 | T_LPAREN type_declarator T_RPAREN { 1249 $$ = $2; 1250 } 1251 | type_attribute type_direct_declarator { 1252 $$ = $2; 1253 } 1254 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1255 $$ = add_array($1, $3.has_dim, $3.dim); 1256 } 1257 | type_direct_declarator param_list asm_or_symbolrename_opt { 1258 $$ = 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 $$ = $2; 1295 } 1296 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1297 gcc_attribute_list_opt { 1298 $$ = add_array($1, $3.has_dim, $3.dim); 1299 } 1300 | direct_param_declarator param_list asm_or_symbolrename_opt { 1301 $$ = add_function(symbolrename($1, $3), $2); 1302 end_declaration_level(); 1303 block_level--; 1304 } 1305 ; 1306 1307 direct_notype_param_declarator: 1308 identifier { 1309 $$ = declarator_name(getsym($1)); 1310 } 1311 | T_LPAREN notype_param_declarator T_RPAREN { 1312 $$ = $2; 1313 } 1314 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1315 $$ = add_array($1, $3.has_dim, $3.dim); 1316 } 1317 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1318 $$ = add_function(symbolrename($1, $3), $2); 1319 end_declaration_level(); 1320 block_level--; 1321 } 1322 ; 1323 1324 param_list: 1325 id_list_lparen identifier_list T_RPAREN { 1326 $$ = $2; 1327 } 1328 | abstract_decl_param_list 1329 ; 1330 1331 id_list_lparen: 1332 T_LPAREN { 1333 block_level++; 1334 begin_declaration_level(PROTO_ARG); 1335 } 1336 ; 1337 1338 array_size_opt: 1339 /* empty */ { 1340 $$.has_dim = false; 1341 $$.dim = 0; 1342 } 1343 | T_ASTERISK { 1344 /* since C99; variable length array of unspecified size */ 1345 $$.has_dim = false; /* TODO: maybe change to true */ 1346 $$.dim = 0; /* just as a placeholder */ 1347 } 1348 | array_size { 1349 $$.has_dim = true; 1350 $$.dim = to_int_constant($1, false); 1351 } 1352 ; 1353 1354 array_size: 1355 type_qualifier_list_opt T_SCLASS constant_expr { 1356 /* C11 6.7.6.3p7 */ 1357 if ($2 != STATIC) 1358 yyerror("Bad attribute"); 1359 /* static array size is a C11 extension */ 1360 c11ism(343); 1361 $$ = $3; 1362 } 1363 | constant_expr 1364 ; 1365 1366 identifier_list: /* C99 6.7.5 */ 1367 T_NAME { 1368 $$ = old_style_function_name(getsym($1)); 1369 } 1370 | identifier_list T_COMMA T_NAME { 1371 $$ = lnklst($1, old_style_function_name(getsym($3))); 1372 } 1373 | identifier_list error 1374 ; 1375 1376 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1377 type_name: /* C99 6.7.6 */ 1378 { 1379 begin_declaration_level(ABSTRACT); 1380 } abstract_declaration { 1381 end_declaration_level(); 1382 $$ = $2->s_type; 1383 } 1384 ; 1385 1386 abstract_declaration: /* specific to lint */ 1387 begin_type_qualifier_list end_type { 1388 $$ = declare_1_abstract(abstract_name()); 1389 } 1390 | begin_type_specifier_qualifier_list end_type { 1391 $$ = declare_1_abstract(abstract_name()); 1392 } 1393 | begin_type_qualifier_list end_type abstract_declarator { 1394 $$ = declare_1_abstract($3); 1395 } 1396 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1397 $$ = declare_1_abstract($3); 1398 } 1399 ; 1400 1401 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1402 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1403 abstract_declarator: 1404 pointer { 1405 $$ = add_pointer(abstract_name(), $1); 1406 } 1407 | direct_abstract_declarator 1408 | pointer direct_abstract_declarator { 1409 $$ = add_pointer($2, $1); 1410 } 1411 ; 1412 1413 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1414 direct_abstract_declarator: 1415 /* TODO: sort rules according to C99 */ 1416 T_LPAREN abstract_declarator T_RPAREN { 1417 $$ = $2; 1418 } 1419 | T_LBRACK array_size_opt T_RBRACK { 1420 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1421 } 1422 | type_attribute direct_abstract_declarator { 1423 $$ = $2; 1424 } 1425 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1426 $$ = add_array($1, $3.has_dim, $3.dim); 1427 } 1428 | abstract_decl_param_list asm_or_symbolrename_opt { 1429 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1430 end_declaration_level(); 1431 block_level--; 1432 } 1433 | direct_abstract_declarator abstract_decl_param_list 1434 asm_or_symbolrename_opt { 1435 $$ = add_function(symbolrename($1, $3), $2); 1436 end_declaration_level(); 1437 block_level--; 1438 } 1439 | direct_abstract_declarator type_attribute_list 1440 ; 1441 1442 abstract_decl_param_list: /* specific to lint */ 1443 abstract_decl_lparen T_RPAREN type_attribute_opt { 1444 $$ = NULL; 1445 } 1446 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1447 type_attribute_opt { 1448 dcs->d_proto = true; 1449 $$ = $2; 1450 } 1451 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1452 $$ = NULL; 1453 } 1454 ; 1455 1456 abstract_decl_lparen: /* specific to lint */ 1457 T_LPAREN { 1458 block_level++; 1459 begin_declaration_level(PROTO_ARG); 1460 } 1461 ; 1462 1463 vararg_parameter_type_list: /* specific to lint */ 1464 parameter_type_list 1465 | parameter_type_list T_COMMA T_ELLIPSIS { 1466 dcs->d_vararg = true; 1467 $$ = $1; 1468 } 1469 | T_ELLIPSIS { 1470 if (sflag) { 1471 /* ANSI C requires formal parameter before '...' */ 1472 error(84); 1473 } else if (!tflag) { 1474 /* ANSI C requires formal parameter before '...' */ 1475 warning(84); 1476 } 1477 dcs->d_vararg = true; 1478 $$ = NULL; 1479 } 1480 ; 1481 1482 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1483 parameter_type_list: 1484 parameter_declaration 1485 | parameter_type_list T_COMMA parameter_declaration { 1486 $$ = lnklst($1, $3); 1487 } 1488 ; 1489 1490 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1491 parameter_declaration: 1492 begin_type_declmods end_type { 1493 /* ^^ There is no check for the missing type-specifier. */ 1494 $$ = declare_argument(abstract_name(), false); 1495 } 1496 | begin_type_declaration_specifiers end_type { 1497 $$ = declare_argument(abstract_name(), false); 1498 } 1499 | begin_type_declmods end_type notype_param_declarator { 1500 /* ^^ There is no check for the missing type-specifier. */ 1501 $$ = declare_argument($3, false); 1502 } 1503 /* 1504 * type_param_declarator is needed because of following conflict: 1505 * "typedef int a; f(int (a));" could be parsed as 1506 * "function with argument a of type int", or 1507 * "function with an abstract argument of type function". 1508 * This grammar realizes the second case. 1509 */ 1510 | begin_type_declaration_specifiers end_type type_param_declarator { 1511 $$ = declare_argument($3, false); 1512 } 1513 | begin_type_declmods end_type abstract_declarator { 1514 /* ^^ There is no check for the missing type-specifier. */ 1515 $$ = declare_argument($3, false); 1516 } 1517 | begin_type_declaration_specifiers end_type abstract_declarator { 1518 $$ = declare_argument($3, false); 1519 } 1520 ; 1521 1522 initializer: /* C99 6.7.8 "Initialization" */ 1523 assignment_expression { 1524 init_expr($1); 1525 } 1526 | init_lbrace init_rbrace { 1527 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1528 } 1529 | init_lbrace initializer_list comma_opt init_rbrace 1530 /* XXX: What is this error handling for? */ 1531 | error 1532 ; 1533 1534 initializer_list: /* C99 6.7.8 "Initialization" */ 1535 initializer_list_item 1536 | initializer_list T_COMMA initializer_list_item 1537 ; 1538 1539 initializer_list_item: /* helper */ 1540 designation initializer 1541 | initializer 1542 ; 1543 1544 designation: /* C99 6.7.8 "Initialization" */ 1545 designator_list T_ASSIGN 1546 | identifier T_COLON { 1547 /* GCC style struct or union member name in initializer */ 1548 gnuism(315); 1549 add_designator_member($1); 1550 } 1551 ; 1552 1553 designator_list: /* C99 6.7.8 "Initialization" */ 1554 designator 1555 | designator_list designator 1556 ; 1557 1558 designator: /* C99 6.7.8 "Initialization" */ 1559 T_LBRACK range T_RBRACK { 1560 add_designator_subscript($2); 1561 if (!Sflag) 1562 /* array initializer with designators is a C9X ... */ 1563 warning(321); 1564 } 1565 | T_POINT identifier { 1566 if (!Sflag) 1567 /* struct or union member name in initializer is ... */ 1568 warning(313); 1569 add_designator_member($2); 1570 } 1571 ; 1572 1573 static_assert_declaration: 1574 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI 1575 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI 1576 ; 1577 1578 range: 1579 constant_expr { 1580 $$.lo = to_int_constant($1, true); 1581 $$.hi = $$.lo; 1582 } 1583 | constant_expr T_ELLIPSIS constant_expr { 1584 $$.lo = to_int_constant($1, true); 1585 $$.hi = to_int_constant($3, true); 1586 /* initialization with '[a...b]' is a GCC extension */ 1587 gnuism(340); 1588 } 1589 ; 1590 1591 init_lbrace: /* helper */ 1592 T_LBRACE { 1593 init_lbrace(); 1594 } 1595 ; 1596 1597 init_rbrace: /* helper */ 1598 T_RBRACE { 1599 init_rbrace(); 1600 } 1601 ; 1602 1603 asm_or_symbolrename_opt: /* GCC extensions */ 1604 /* empty */ { 1605 $$ = NULL; 1606 } 1607 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1608 freeyyv(&$3, T_STRING); 1609 $$ = NULL; 1610 } 1611 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1612 $$ = $3; 1613 } 1614 ; 1615 1616 statement: /* C99 6.8 */ 1617 expression_statement 1618 | non_expr_statement 1619 ; 1620 1621 non_expr_statement: /* helper for C99 6.8 */ 1622 type_attribute T_SEMI 1623 | labeled_statement 1624 | compound_statement 1625 | selection_statement 1626 | iteration_statement 1627 | jump_statement { 1628 seen_fallthrough = false; 1629 } 1630 | asm_statement 1631 ; 1632 1633 labeled_statement: /* C99 6.8.1 */ 1634 label type_attribute_opt statement 1635 ; 1636 1637 label: 1638 T_NAME T_COLON { 1639 symtyp = FLABEL; 1640 named_label(getsym($1)); 1641 } 1642 | T_CASE constant_expr T_COLON { 1643 case_label($2); 1644 seen_fallthrough = true; 1645 } 1646 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1647 /* XXX: We don't fill all cases */ 1648 case_label($2); 1649 seen_fallthrough = true; 1650 } 1651 | T_DEFAULT T_COLON { 1652 default_label(); 1653 seen_fallthrough = true; 1654 } 1655 ; 1656 1657 compound_statement: /* C99 6.8.2 */ 1658 compound_statement_lbrace compound_statement_rbrace 1659 | compound_statement_lbrace block_item_list compound_statement_rbrace 1660 ; 1661 1662 compound_statement_lbrace: 1663 T_LBRACE { 1664 block_level++; 1665 mem_block_level++; 1666 begin_declaration_level(AUTO); 1667 } 1668 ; 1669 1670 compound_statement_rbrace: 1671 T_RBRACE { 1672 end_declaration_level(); 1673 freeblk(); 1674 mem_block_level--; 1675 block_level--; 1676 seen_fallthrough = false; 1677 } 1678 ; 1679 1680 block_item_list: /* C99 6.8.2 */ 1681 block_item 1682 | block_item_list block_item { 1683 if (!Sflag && $1 && !$2) 1684 /* declarations after statements is a C99 feature */ 1685 c99ism(327); 1686 $$ = $1 || $2; 1687 } 1688 ; 1689 1690 block_item: /* C99 6.8.2 */ 1691 declaration_or_error { 1692 $$ = false; 1693 restore_warning_flags(); 1694 } 1695 | statement { 1696 $$ = true; 1697 restore_warning_flags(); 1698 } 1699 ; 1700 1701 expression_statement: /* C99 6.8.3 */ 1702 expression T_SEMI { 1703 expr($1, false, false, false, false); 1704 seen_fallthrough = false; 1705 } 1706 | T_SEMI { 1707 seen_fallthrough = false; 1708 } 1709 ; 1710 1711 selection_statement: /* C99 6.8.4 */ 1712 if_without_else %prec T_THEN { 1713 save_warning_flags(); 1714 if2(); 1715 if3(false); 1716 } 1717 | if_without_else T_ELSE { 1718 save_warning_flags(); 1719 if2(); 1720 } statement { 1721 clear_warning_flags(); 1722 if3(true); 1723 } 1724 | if_without_else T_ELSE error { 1725 clear_warning_flags(); 1726 if3(false); 1727 } 1728 | switch_expr statement { 1729 clear_warning_flags(); 1730 switch2(); 1731 } 1732 | switch_expr error { 1733 clear_warning_flags(); 1734 switch2(); 1735 } 1736 ; 1737 1738 if_without_else: /* see C99 6.8.4 */ 1739 if_expr statement 1740 | if_expr error 1741 ; 1742 1743 if_expr: /* see C99 6.8.4 */ 1744 T_IF T_LPAREN expression T_RPAREN { 1745 if1($3); 1746 clear_warning_flags(); 1747 } 1748 ; 1749 1750 switch_expr: /* see C99 6.8.4 */ 1751 T_SWITCH T_LPAREN expression T_RPAREN { 1752 switch1($3); 1753 clear_warning_flags(); 1754 } 1755 ; 1756 1757 iteration_statement: /* C99 6.8.5 */ 1758 while_expr statement { 1759 clear_warning_flags(); 1760 while2(); 1761 } 1762 | while_expr error { 1763 clear_warning_flags(); 1764 while2(); 1765 } 1766 | do_statement do_while_expr { 1767 do2($2); 1768 seen_fallthrough = false; 1769 } 1770 | do error { 1771 clear_warning_flags(); 1772 do2(NULL); 1773 } 1774 | for_exprs statement { 1775 clear_warning_flags(); 1776 for2(); 1777 end_declaration_level(); 1778 block_level--; 1779 } 1780 | for_exprs error { 1781 clear_warning_flags(); 1782 for2(); 1783 end_declaration_level(); 1784 block_level--; 1785 } 1786 ; 1787 1788 while_expr: /* see C99 6.8.5 */ 1789 T_WHILE T_LPAREN expression T_RPAREN { 1790 while1($3); 1791 clear_warning_flags(); 1792 } 1793 ; 1794 1795 do_statement: /* see C99 6.8.5 */ 1796 do statement { 1797 clear_warning_flags(); 1798 } 1799 ; 1800 1801 do: /* see C99 6.8.5 */ 1802 T_DO { 1803 do1(); 1804 } 1805 ; 1806 1807 do_while_expr: /* see C99 6.8.5 */ 1808 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1809 $$ = $3; 1810 } 1811 ; 1812 1813 for_start: /* see C99 6.8.5 */ 1814 T_FOR T_LPAREN { 1815 begin_declaration_level(AUTO); 1816 block_level++; 1817 } 1818 ; 1819 1820 for_exprs: /* see C99 6.8.5 */ 1821 for_start 1822 begin_type_declaration_specifiers end_type 1823 notype_init_declarators T_SEMI 1824 expression_opt T_SEMI expression_opt T_RPAREN { 1825 /* variable declaration in for loop */ 1826 c99ism(325); 1827 for1(NULL, $6, $8); 1828 clear_warning_flags(); 1829 } 1830 | for_start 1831 expression_opt T_SEMI 1832 expression_opt T_SEMI 1833 expression_opt T_RPAREN { 1834 for1($2, $4, $6); 1835 clear_warning_flags(); 1836 } 1837 ; 1838 1839 jump_statement: /* C99 6.8.6 */ 1840 goto identifier T_SEMI { 1841 do_goto(getsym($2)); 1842 } 1843 | goto error T_SEMI { 1844 symtyp = FVFT; 1845 } 1846 | T_CONTINUE T_SEMI { 1847 do_continue(); 1848 } 1849 | T_BREAK T_SEMI { 1850 do_break(); 1851 } 1852 | T_RETURN T_SEMI { 1853 do_return(NULL); 1854 } 1855 | T_RETURN expression T_SEMI { 1856 do_return($2); 1857 } 1858 ; 1859 1860 goto: /* see C99 6.8.6 */ 1861 T_GOTO { 1862 symtyp = FLABEL; 1863 } 1864 ; 1865 1866 asm_statement: /* GCC extension */ 1867 T_ASM T_LPAREN read_until_rparen T_SEMI { 1868 setasm(); 1869 } 1870 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1871 setasm(); 1872 } 1873 | T_ASM error 1874 ; 1875 1876 read_until_rparen: /* helper for 'asm_statement' */ 1877 /* empty */ { 1878 read_until_rparen(); 1879 } 1880 ; 1881 1882 translation_unit: /* C99 6.9 */ 1883 external_declaration 1884 | translation_unit external_declaration 1885 ; 1886 1887 external_declaration: /* C99 6.9 */ 1888 function_definition { 1889 global_clean_up_decl(false); 1890 clear_warning_flags(); 1891 } 1892 | top_level_declaration { 1893 global_clean_up_decl(false); 1894 clear_warning_flags(); 1895 } 1896 | asm_statement /* GCC extension */ 1897 | T_SEMI { /* GCC extension */ 1898 if (sflag) { 1899 /* empty declaration */ 1900 error(0); 1901 } else if (!tflag) { 1902 /* empty declaration */ 1903 warning(0); 1904 } 1905 } 1906 ; 1907 1908 /* 1909 * On the top level, lint allows several forms of declarations that it doesn't 1910 * allow in functions. For example, a single ';' is an empty declaration and 1911 * is supported by some compilers, but in a function it would be an empty 1912 * statement, not a declaration. This makes a difference in C90 mode, where 1913 * a statement must not be followed by a declaration. 1914 * 1915 * See 'declaration' for all other declarations. 1916 */ 1917 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1918 begin_type end_type notype_init_declarators T_SEMI { 1919 if (sflag) { 1920 /* old style declaration; add 'int' */ 1921 error(1); 1922 } else if (!tflag) { 1923 /* old style declaration; add 'int' */ 1924 warning(1); 1925 } 1926 } 1927 | declaration 1928 | error T_SEMI { 1929 global_clean_up(); 1930 } 1931 | error T_RBRACE { 1932 global_clean_up(); 1933 } 1934 ; 1935 1936 function_definition: /* C99 6.9.1 */ 1937 func_declarator { 1938 if ($1->s_type->t_tspec != FUNC) { 1939 /* syntax error '%s' */ 1940 error(249, yytext); 1941 YYERROR; 1942 } 1943 if ($1->s_type->t_typedef) { 1944 /* ()-less function definition */ 1945 error(64); 1946 YYERROR; 1947 } 1948 funcdef($1); 1949 block_level++; 1950 begin_declaration_level(ARG); 1951 if (lwarn == LWARN_NONE) 1952 $1->s_used = true; 1953 } arg_declaration_list_opt { 1954 end_declaration_level(); 1955 block_level--; 1956 check_func_lint_directives(); 1957 check_func_old_style_arguments(); 1958 begin_control_statement(CS_FUNCTION_BODY); 1959 } compound_statement { 1960 funcend(); 1961 end_control_statement(CS_FUNCTION_BODY); 1962 } 1963 ; 1964 1965 func_declarator: 1966 begin_type end_type notype_declarator { 1967 /* ^^ There is no check for the missing type-specifier. */ 1968 $$ = $3; 1969 } 1970 | begin_type_declmods end_type notype_declarator { 1971 /* ^^ There is no check for the missing type-specifier. */ 1972 $$ = $3; 1973 } 1974 | begin_type_declaration_specifiers end_type type_declarator { 1975 $$ = $3; 1976 } 1977 ; 1978 1979 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1980 /* empty */ 1981 | arg_declaration_list 1982 ; 1983 1984 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 1985 arg_declaration 1986 | arg_declaration_list arg_declaration 1987 /* XXX or better "arg_declaration error" ? */ 1988 | error 1989 ; 1990 1991 /* 1992 * "arg_declaration" is separated from "declaration" because it 1993 * needs other error handling. 1994 */ 1995 arg_declaration: 1996 begin_type_declmods end_type T_SEMI { 1997 /* empty declaration */ 1998 warning(2); 1999 } 2000 | begin_type_declmods end_type notype_init_declarators T_SEMI 2001 | begin_type_declaration_specifiers end_type T_SEMI { 2002 if (!dcs->d_nonempty_decl) { 2003 /* empty declaration */ 2004 warning(2); 2005 } else { 2006 /* '%s' declared in argument declaration list */ 2007 warning(3, type_name(dcs->d_type)); 2008 } 2009 } 2010 | begin_type_declaration_specifiers end_type 2011 type_init_declarators T_SEMI { 2012 if (dcs->d_nonempty_decl) { 2013 /* '%s' declared in argument declaration list */ 2014 warning(3, type_name(dcs->d_type)); 2015 } 2016 } 2017 | begin_type_declmods error 2018 | begin_type_declaration_specifiers error 2019 ; 2020 2021 gcc_attribute_list_opt: 2022 /* empty */ 2023 | gcc_attribute_list 2024 ; 2025 2026 gcc_attribute_list: 2027 gcc_attribute 2028 | gcc_attribute_list gcc_attribute 2029 ; 2030 2031 gcc_attribute: 2032 T_ATTRIBUTE T_LPAREN T_LPAREN { 2033 attron = true; 2034 } gcc_attribute_spec_list { 2035 attron = false; 2036 } T_RPAREN T_RPAREN 2037 ; 2038 2039 gcc_attribute_spec_list: 2040 gcc_attribute_spec 2041 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2042 ; 2043 2044 gcc_attribute_spec: 2045 /* empty */ 2046 | T_AT_ALWAYS_INLINE 2047 | T_AT_ALIAS T_LPAREN string T_RPAREN 2048 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2049 | T_AT_ALIGNED 2050 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2051 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2052 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2053 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2054 | T_AT_COLD 2055 | T_AT_COMMON 2056 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2057 | T_AT_CONSTRUCTOR 2058 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2059 | T_AT_DEPRECATED 2060 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2061 | T_AT_DESTRUCTOR 2062 | T_AT_FALLTHROUGH { 2063 fallthru(1); 2064 } 2065 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2066 constant_expr T_COMMA constant_expr T_RPAREN 2067 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2068 | T_AT_GNU_INLINE 2069 | T_AT_HOT 2070 | T_AT_MALLOC 2071 | T_AT_MAY_ALIAS 2072 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2073 | T_AT_NOINLINE 2074 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2075 | T_AT_NONNULL 2076 | T_AT_NONSTRING 2077 | T_AT_NORETURN 2078 | T_AT_NOTHROW 2079 | T_AT_NO_INSTRUMENT_FUNCTION 2080 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2081 | T_AT_PACKED { 2082 addpacked(); 2083 } 2084 | T_AT_PCS T_LPAREN string T_RPAREN 2085 | T_AT_PURE 2086 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2087 | T_AT_RETURNS_NONNULL 2088 | T_AT_RETURNS_TWICE 2089 | T_AT_SECTION T_LPAREN string T_RPAREN 2090 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2091 | T_AT_SENTINEL 2092 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2093 | T_AT_TUNION 2094 | T_AT_UNUSED { 2095 add_attr_used(); 2096 } 2097 | T_AT_USED { 2098 add_attr_used(); 2099 } 2100 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2101 | T_AT_WARN_UNUSED_RESULT 2102 | T_AT_WEAK 2103 | T_QUAL { 2104 if ($1 != CONST) 2105 yyerror("Bad attribute"); 2106 } 2107 ; 2108 2109 gcc_attribute_bounded: 2110 T_AT_MINBYTES 2111 | T_AT_STRING 2112 | T_AT_BUFFER 2113 ; 2114 2115 gcc_attribute_format: 2116 T_AT_FORMAT_GNU_PRINTF 2117 | T_AT_FORMAT_PRINTF 2118 | T_AT_FORMAT_SCANF 2119 | T_AT_FORMAT_STRFMON 2120 | T_AT_FORMAT_STRFTIME 2121 | T_AT_FORMAT_SYSLOG 2122 ; 2123 2124 %% 2125 2126 /* ARGSUSED */ 2127 int 2128 yyerror(const char *msg) 2129 { 2130 /* syntax error '%s' */ 2131 error(249, yytext); 2132 if (++sytxerr >= 5) 2133 norecover(); 2134 return 0; 2135 } 2136 2137 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2138 || (defined(YYDEBUG) && defined(YYBISON)) 2139 static const char * 2140 cgram_to_string(int token, YYSTYPE val) 2141 { 2142 static const char *tqual_name[] = { 2143 "const", "volatile", "restrict", "_Thread_local" 2144 }; 2145 2146 switch (token) { 2147 case T_INCDEC: 2148 case T_MULTIPLICATIVE: 2149 case T_ADDITIVE: 2150 case T_SHIFT: 2151 case T_RELATIONAL: 2152 case T_EQUALITY: 2153 case T_OPASSIGN: 2154 return modtab[val.y_op].m_name; 2155 case T_SCLASS: 2156 return scl_name(val.y_scl); 2157 case T_TYPE: 2158 case T_STRUCT_OR_UNION: 2159 return tspec_name(val.y_tspec); 2160 case T_QUAL: 2161 return tqual_name[val.y_tqual]; 2162 case T_NAME: 2163 return val.y_name->sb_name; 2164 default: 2165 return "<none>"; 2166 } 2167 } 2168 #endif 2169 2170 #if defined(YYDEBUG) && defined(YYBISON) 2171 static void 2172 cgram_print(FILE *output, int token, YYSTYPE val) 2173 { 2174 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2175 } 2176 #endif 2177 2178 static void 2179 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2180 { 2181 declare(decl, initflg, renaming); 2182 if (renaming != NULL) 2183 freeyyv(&renaming, T_NAME); 2184 } 2185 2186 /* 2187 * Discard all input tokens up to and including the next 2188 * unmatched right paren 2189 */ 2190 static void 2191 read_until_rparen(void) 2192 { 2193 int level; 2194 2195 if (yychar < 0) 2196 yychar = yylex(); 2197 freeyyv(&yylval, yychar); 2198 2199 level = 1; 2200 while (yychar != T_RPAREN || --level > 0) { 2201 if (yychar == T_LPAREN) { 2202 level++; 2203 } else if (yychar <= 0) { 2204 break; 2205 } 2206 freeyyv(&yylval, yychar = yylex()); 2207 } 2208 2209 yyclearin; 2210 } 2211 2212 static sym_t * 2213 symbolrename(sym_t *s, sbuf_t *sb) 2214 { 2215 if (sb != NULL) 2216 s->s_rename = sb->sb_name; 2217 return s; 2218 } 2219
Indexes created Wed Oct 01 18:09:54 GMT 2025