cgram.y revision 1.368
1 %{ 2 /* $NetBSD: cgram.y,v 1.368 2021/11/16 17:41:23 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 1.368 2021/11/16 17:41:23 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 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 $$ = NULL; 1000 } 1001 | error T_SEMI { 1002 symtyp = FVFT; 1003 $$ = NULL; 1004 } 1005 ; 1006 1007 notype_struct_declarators: 1008 notype_struct_declarator { 1009 $$ = declarator_1_struct_union($1); 1010 } 1011 | notype_struct_declarators { 1012 symtyp = FMEMBER; 1013 } T_COMMA type_struct_declarator { 1014 $$ = lnklst($1, declarator_1_struct_union($4)); 1015 } 1016 ; 1017 1018 type_struct_declarators: 1019 type_struct_declarator { 1020 $$ = declarator_1_struct_union($1); 1021 } 1022 | type_struct_declarators { 1023 symtyp = FMEMBER; 1024 } T_COMMA type_struct_declarator { 1025 $$ = lnklst($1, declarator_1_struct_union($4)); 1026 } 1027 ; 1028 1029 notype_struct_declarator: 1030 notype_declarator 1031 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1032 $$ = bitfield($1, to_int_constant($3, true)); 1033 } 1034 | { 1035 symtyp = FVFT; 1036 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1037 $$ = bitfield(NULL, to_int_constant($3, true)); 1038 } 1039 ; 1040 1041 type_struct_declarator: 1042 type_declarator 1043 | type_declarator T_COLON constant_expr { 1044 $$ = bitfield($1, to_int_constant($3, true)); 1045 } 1046 | { 1047 symtyp = FVFT; 1048 } T_COLON constant_expr { 1049 $$ = bitfield(NULL, to_int_constant($3, true)); 1050 } 1051 ; 1052 1053 enum_specifier: /* C99 6.7.2.2 */ 1054 enum gcc_attribute_list_opt identifier_sym { 1055 $$ = mktag($3, ENUM, false, false); 1056 } 1057 | enum gcc_attribute_list_opt identifier_sym { 1058 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1059 } enum_declaration /*gcc_attribute_list_opt*/ { 1060 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1061 } 1062 | enum gcc_attribute_list_opt { 1063 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1064 } enum_declaration /*gcc_attribute_list_opt*/ { 1065 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1066 } 1067 | enum error { 1068 symtyp = FVFT; 1069 $$ = gettyp(INT); 1070 } 1071 ; 1072 1073 enum: /* helper for C99 6.7.2.2 */ 1074 T_ENUM { 1075 symtyp = FTAG; 1076 begin_declaration_level(CTCONST); 1077 } 1078 ; 1079 1080 enum_declaration: /* helper for C99 6.7.2.2 */ 1081 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1082 $$ = $2; 1083 } 1084 ; 1085 1086 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1087 T_LBRACE { 1088 symtyp = FVFT; 1089 enumval = 0; 1090 } 1091 ; 1092 1093 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1094 enumerator_list 1095 | enumerator_list T_COMMA { 1096 if (sflag) { 1097 /* trailing ',' prohibited in enum declaration */ 1098 error(54); 1099 } else { 1100 /* trailing ',' prohibited in enum declaration */ 1101 c99ism(54); 1102 } 1103 $$ = $1; 1104 } 1105 ; 1106 1107 enumerator_list: /* C99 6.7.2.2 */ 1108 enumerator 1109 | enumerator_list T_COMMA enumerator { 1110 $$ = lnklst($1, $3); 1111 } 1112 | error { 1113 $$ = NULL; 1114 } 1115 ; 1116 1117 enumerator: /* C99 6.7.2.2 */ 1118 identifier_sym gcc_attribute_list_opt { 1119 $$ = enumeration_constant($1, enumval, true); 1120 } 1121 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1122 $$ = enumeration_constant($1, to_int_constant($4, true), 1123 false); 1124 } 1125 ; 1126 1127 type_qualifier: /* C99 6.7.3 */ 1128 T_QUAL { 1129 $$ = xcalloc(1, sizeof(*$$)); 1130 if ($1 == CONST) 1131 $$->p_const = true; 1132 if ($1 == VOLATILE) 1133 $$->p_volatile = true; 1134 } 1135 ; 1136 1137 pointer: /* C99 6.7.5 */ 1138 asterisk type_qualifier_list_opt { 1139 $$ = merge_qualified_pointer($1, $2); 1140 } 1141 | asterisk type_qualifier_list_opt pointer { 1142 $$ = merge_qualified_pointer($1, $2); 1143 $$ = merge_qualified_pointer($$, $3); 1144 } 1145 ; 1146 1147 asterisk: /* helper for 'pointer' */ 1148 T_ASTERISK { 1149 $$ = xcalloc(1, sizeof(*$$)); 1150 $$->p_pointer = true; 1151 } 1152 ; 1153 1154 type_qualifier_list_opt: /* see C99 6.7.5 */ 1155 /* empty */ { 1156 $$ = NULL; 1157 } 1158 | type_qualifier_list 1159 ; 1160 1161 type_qualifier_list: /* C99 6.7.5 */ 1162 type_qualifier 1163 | type_qualifier_list type_qualifier { 1164 $$ = merge_qualified_pointer($1, $2); 1165 } 1166 ; 1167 1168 /* 1169 * For an explanation of 'notype' in the following rules, see 1170 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1171 */ 1172 1173 notype_init_declarators: 1174 notype_init_declarator 1175 | notype_init_declarators T_COMMA type_init_declarator 1176 ; 1177 1178 type_init_declarators: 1179 type_init_declarator 1180 | type_init_declarators T_COMMA type_init_declarator 1181 ; 1182 1183 notype_init_declarator: 1184 notype_declarator asm_or_symbolrename_opt { 1185 cgram_declare($1, false, $2); 1186 check_size($1); 1187 } 1188 | notype_declarator asm_or_symbolrename_opt { 1189 begin_initialization($1); 1190 cgram_declare($1, true, $2); 1191 } T_ASSIGN initializer { 1192 check_size($1); 1193 end_initialization(); 1194 } 1195 ; 1196 1197 type_init_declarator: 1198 type_declarator asm_or_symbolrename_opt { 1199 cgram_declare($1, false, $2); 1200 check_size($1); 1201 } 1202 | type_declarator asm_or_symbolrename_opt { 1203 begin_initialization($1); 1204 cgram_declare($1, true, $2); 1205 } T_ASSIGN initializer { 1206 check_size($1); 1207 end_initialization(); 1208 } 1209 ; 1210 1211 notype_declarator: 1212 notype_direct_declarator 1213 | pointer notype_direct_declarator { 1214 $$ = add_pointer($2, $1); 1215 } 1216 ; 1217 1218 type_declarator: 1219 type_direct_declarator 1220 | pointer type_direct_declarator { 1221 $$ = add_pointer($2, $1); 1222 } 1223 ; 1224 1225 notype_direct_declarator: 1226 T_NAME { 1227 $$ = declarator_name(getsym($1)); 1228 } 1229 | T_LPAREN type_declarator T_RPAREN { 1230 $$ = $2; 1231 } 1232 | type_attribute notype_direct_declarator { 1233 $$ = $2; 1234 } 1235 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1236 $$ = add_array($1, $3.has_dim, $3.dim); 1237 } 1238 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1239 $$ = add_function(symbolrename($1, $3), $2); 1240 end_declaration_level(); 1241 block_level--; 1242 } 1243 | notype_direct_declarator type_attribute 1244 ; 1245 1246 type_direct_declarator: 1247 identifier { 1248 $$ = declarator_name(getsym($1)); 1249 } 1250 | T_LPAREN type_declarator T_RPAREN { 1251 $$ = $2; 1252 } 1253 | type_attribute type_direct_declarator { 1254 $$ = $2; 1255 } 1256 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1257 $$ = add_array($1, $3.has_dim, $3.dim); 1258 } 1259 | type_direct_declarator param_list asm_or_symbolrename_opt { 1260 $$ = add_function(symbolrename($1, $3), $2); 1261 end_declaration_level(); 1262 block_level--; 1263 } 1264 | type_direct_declarator type_attribute 1265 ; 1266 1267 /* 1268 * The two distinct rules type_param_declarator and notype_param_declarator 1269 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1270 * always treated as a typename, not an argument name. For example, after 1271 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1272 * "f(int (double));", not "f(int a);". 1273 */ 1274 type_param_declarator: 1275 direct_param_declarator 1276 | pointer direct_param_declarator { 1277 $$ = add_pointer($2, $1); 1278 } 1279 ; 1280 1281 notype_param_declarator: 1282 direct_notype_param_declarator 1283 | pointer direct_notype_param_declarator { 1284 $$ = add_pointer($2, $1); 1285 } 1286 ; 1287 1288 direct_param_declarator: 1289 identifier type_attribute_list { 1290 $$ = declarator_name(getsym($1)); 1291 } 1292 | identifier { 1293 $$ = declarator_name(getsym($1)); 1294 } 1295 | T_LPAREN notype_param_declarator T_RPAREN { 1296 $$ = $2; 1297 } 1298 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1299 gcc_attribute_list_opt { 1300 $$ = add_array($1, $3.has_dim, $3.dim); 1301 } 1302 | direct_param_declarator param_list asm_or_symbolrename_opt { 1303 $$ = add_function(symbolrename($1, $3), $2); 1304 end_declaration_level(); 1305 block_level--; 1306 } 1307 ; 1308 1309 direct_notype_param_declarator: 1310 identifier { 1311 $$ = declarator_name(getsym($1)); 1312 } 1313 | T_LPAREN notype_param_declarator T_RPAREN { 1314 $$ = $2; 1315 } 1316 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1317 $$ = add_array($1, $3.has_dim, $3.dim); 1318 } 1319 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1320 $$ = add_function(symbolrename($1, $3), $2); 1321 end_declaration_level(); 1322 block_level--; 1323 } 1324 ; 1325 1326 param_list: 1327 id_list_lparen identifier_list T_RPAREN { 1328 $$ = $2; 1329 } 1330 | abstract_decl_param_list 1331 ; 1332 1333 id_list_lparen: 1334 T_LPAREN { 1335 block_level++; 1336 begin_declaration_level(PROTO_ARG); 1337 } 1338 ; 1339 1340 array_size_opt: 1341 /* empty */ { 1342 $$.has_dim = false; 1343 $$.dim = 0; 1344 } 1345 | T_ASTERISK { 1346 /* since C99; variable length array of unspecified size */ 1347 $$.has_dim = false; /* TODO: maybe change to true */ 1348 $$.dim = 0; /* just as a placeholder */ 1349 } 1350 | array_size { 1351 $$.has_dim = true; 1352 $$.dim = to_int_constant($1, false); 1353 } 1354 ; 1355 1356 array_size: 1357 type_qualifier_list_opt T_SCLASS constant_expr { 1358 /* C11 6.7.6.3p7 */ 1359 if ($2 != STATIC) 1360 yyerror("Bad attribute"); 1361 /* static array size is a C11 extension */ 1362 c11ism(343); 1363 $$ = $3; 1364 } 1365 | constant_expr 1366 ; 1367 1368 identifier_list: /* C99 6.7.5 */ 1369 T_NAME { 1370 $$ = old_style_function_name(getsym($1)); 1371 } 1372 | identifier_list T_COMMA T_NAME { 1373 $$ = lnklst($1, old_style_function_name(getsym($3))); 1374 } 1375 | identifier_list error 1376 ; 1377 1378 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1379 type_name: /* C99 6.7.6 */ 1380 { 1381 begin_declaration_level(ABSTRACT); 1382 } abstract_declaration { 1383 end_declaration_level(); 1384 $$ = $2->s_type; 1385 } 1386 ; 1387 1388 abstract_declaration: /* specific to lint */ 1389 begin_type_qualifier_list end_type { 1390 $$ = declare_1_abstract(abstract_name()); 1391 } 1392 | begin_type_specifier_qualifier_list end_type { 1393 $$ = declare_1_abstract(abstract_name()); 1394 } 1395 | begin_type_qualifier_list end_type abstract_declarator { 1396 $$ = declare_1_abstract($3); 1397 } 1398 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1399 $$ = declare_1_abstract($3); 1400 } 1401 ; 1402 1403 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1404 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1405 abstract_declarator: 1406 pointer { 1407 $$ = add_pointer(abstract_name(), $1); 1408 } 1409 | direct_abstract_declarator 1410 | pointer direct_abstract_declarator { 1411 $$ = add_pointer($2, $1); 1412 } 1413 ; 1414 1415 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1416 direct_abstract_declarator: 1417 /* TODO: sort rules according to C99 */ 1418 T_LPAREN abstract_declarator T_RPAREN { 1419 $$ = $2; 1420 } 1421 | T_LBRACK array_size_opt T_RBRACK { 1422 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1423 } 1424 | type_attribute direct_abstract_declarator { 1425 $$ = $2; 1426 } 1427 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1428 $$ = add_array($1, $3.has_dim, $3.dim); 1429 } 1430 | abstract_decl_param_list asm_or_symbolrename_opt { 1431 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1432 end_declaration_level(); 1433 block_level--; 1434 } 1435 | direct_abstract_declarator abstract_decl_param_list 1436 asm_or_symbolrename_opt { 1437 $$ = add_function(symbolrename($1, $3), $2); 1438 end_declaration_level(); 1439 block_level--; 1440 } 1441 | direct_abstract_declarator type_attribute_list 1442 ; 1443 1444 abstract_decl_param_list: /* specific to lint */ 1445 abstract_decl_lparen T_RPAREN type_attribute_opt { 1446 $$ = NULL; 1447 } 1448 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1449 type_attribute_opt { 1450 dcs->d_proto = true; 1451 $$ = $2; 1452 } 1453 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1454 $$ = NULL; 1455 } 1456 ; 1457 1458 abstract_decl_lparen: /* specific to lint */ 1459 T_LPAREN { 1460 block_level++; 1461 begin_declaration_level(PROTO_ARG); 1462 } 1463 ; 1464 1465 vararg_parameter_type_list: /* specific to lint */ 1466 parameter_type_list 1467 | parameter_type_list T_COMMA T_ELLIPSIS { 1468 dcs->d_vararg = true; 1469 $$ = $1; 1470 } 1471 | T_ELLIPSIS { 1472 if (sflag) { 1473 /* ANSI C requires formal parameter before '...' */ 1474 error(84); 1475 } else if (!tflag) { 1476 /* ANSI C requires formal parameter before '...' */ 1477 warning(84); 1478 } 1479 dcs->d_vararg = true; 1480 $$ = NULL; 1481 } 1482 ; 1483 1484 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1485 parameter_type_list: 1486 parameter_declaration 1487 | parameter_type_list T_COMMA parameter_declaration { 1488 $$ = lnklst($1, $3); 1489 } 1490 ; 1491 1492 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1493 parameter_declaration: 1494 begin_type_declmods end_type { 1495 /* ^^ There is no check for the missing type-specifier. */ 1496 $$ = declare_argument(abstract_name(), false); 1497 } 1498 | begin_type_declaration_specifiers end_type { 1499 $$ = declare_argument(abstract_name(), false); 1500 } 1501 | begin_type_declmods end_type notype_param_declarator { 1502 /* ^^ There is no check for the missing type-specifier. */ 1503 $$ = declare_argument($3, false); 1504 } 1505 /* 1506 * type_param_declarator is needed because of following conflict: 1507 * "typedef int a; f(int (a));" could be parsed as 1508 * "function with argument a of type int", or 1509 * "function with an abstract argument of type function". 1510 * This grammar realizes the second case. 1511 */ 1512 | begin_type_declaration_specifiers end_type type_param_declarator { 1513 $$ = declare_argument($3, false); 1514 } 1515 | begin_type_declmods end_type abstract_declarator { 1516 /* ^^ There is no check for the missing type-specifier. */ 1517 $$ = declare_argument($3, false); 1518 } 1519 | begin_type_declaration_specifiers end_type abstract_declarator { 1520 $$ = declare_argument($3, false); 1521 } 1522 ; 1523 1524 initializer: /* C99 6.7.8 "Initialization" */ 1525 assignment_expression { 1526 init_expr($1); 1527 } 1528 | init_lbrace init_rbrace { 1529 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1530 } 1531 | init_lbrace initializer_list comma_opt init_rbrace 1532 /* XXX: What is this error handling for? */ 1533 | error 1534 ; 1535 1536 initializer_list: /* C99 6.7.8 "Initialization" */ 1537 initializer_list_item 1538 | initializer_list T_COMMA initializer_list_item 1539 ; 1540 1541 initializer_list_item: /* helper */ 1542 designation initializer 1543 | initializer 1544 ; 1545 1546 designation: /* C99 6.7.8 "Initialization" */ 1547 designator_list T_ASSIGN 1548 | identifier T_COLON { 1549 /* GCC style struct or union member name in initializer */ 1550 gnuism(315); 1551 add_designator_member($1); 1552 } 1553 ; 1554 1555 designator_list: /* C99 6.7.8 "Initialization" */ 1556 designator 1557 | designator_list designator 1558 ; 1559 1560 designator: /* C99 6.7.8 "Initialization" */ 1561 T_LBRACK range T_RBRACK { 1562 add_designator_subscript($2); 1563 if (!Sflag) 1564 /* array initializer with designators is a C9X ... */ 1565 warning(321); 1566 } 1567 | T_POINT identifier { 1568 if (!Sflag) 1569 /* struct or union member name in initializer is ... */ 1570 warning(313); 1571 add_designator_member($2); 1572 } 1573 ; 1574 1575 static_assert_declaration: 1576 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1577 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1578 ; 1579 1580 range: 1581 constant_expr { 1582 $$.lo = to_int_constant($1, true); 1583 $$.hi = $$.lo; 1584 } 1585 | constant_expr T_ELLIPSIS constant_expr { 1586 $$.lo = to_int_constant($1, true); 1587 $$.hi = to_int_constant($3, true); 1588 /* initialization with '[a...b]' is a GCC extension */ 1589 gnuism(340); 1590 } 1591 ; 1592 1593 init_lbrace: /* helper */ 1594 T_LBRACE { 1595 init_lbrace(); 1596 } 1597 ; 1598 1599 init_rbrace: /* helper */ 1600 T_RBRACE { 1601 init_rbrace(); 1602 } 1603 ; 1604 1605 asm_or_symbolrename_opt: /* GCC extensions */ 1606 /* empty */ { 1607 $$ = NULL; 1608 } 1609 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1610 freeyyv(&$3, T_STRING); 1611 $$ = NULL; 1612 } 1613 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1614 $$ = $3; 1615 } 1616 ; 1617 1618 statement: /* C99 6.8 */ 1619 expression_statement 1620 | non_expr_statement 1621 ; 1622 1623 non_expr_statement: /* helper for C99 6.8 */ 1624 type_attribute T_SEMI 1625 | labeled_statement 1626 | compound_statement 1627 | selection_statement 1628 | iteration_statement 1629 | jump_statement { 1630 seen_fallthrough = false; 1631 } 1632 | asm_statement 1633 ; 1634 1635 labeled_statement: /* C99 6.8.1 */ 1636 label type_attribute_opt statement 1637 ; 1638 1639 label: 1640 T_NAME T_COLON { 1641 symtyp = FLABEL; 1642 named_label(getsym($1)); 1643 } 1644 | T_CASE constant_expr T_COLON { 1645 case_label($2); 1646 seen_fallthrough = true; 1647 } 1648 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1649 /* XXX: We don't fill all cases */ 1650 case_label($2); 1651 seen_fallthrough = true; 1652 } 1653 | T_DEFAULT T_COLON { 1654 default_label(); 1655 seen_fallthrough = true; 1656 } 1657 ; 1658 1659 compound_statement: /* C99 6.8.2 */ 1660 compound_statement_lbrace compound_statement_rbrace 1661 | compound_statement_lbrace block_item_list compound_statement_rbrace 1662 ; 1663 1664 compound_statement_lbrace: 1665 T_LBRACE { 1666 block_level++; 1667 mem_block_level++; 1668 begin_declaration_level(AUTO); 1669 } 1670 ; 1671 1672 compound_statement_rbrace: 1673 T_RBRACE { 1674 end_declaration_level(); 1675 freeblk(); 1676 mem_block_level--; 1677 block_level--; 1678 seen_fallthrough = false; 1679 } 1680 ; 1681 1682 block_item_list: /* C99 6.8.2 */ 1683 block_item 1684 | block_item_list block_item { 1685 if (!Sflag && $1 && !$2) 1686 /* declarations after statements is a C99 feature */ 1687 c99ism(327); 1688 $$ = $1 || $2; 1689 } 1690 ; 1691 1692 block_item: /* C99 6.8.2 */ 1693 declaration_or_error { 1694 $$ = false; 1695 restore_warning_flags(); 1696 } 1697 | statement { 1698 $$ = true; 1699 restore_warning_flags(); 1700 } 1701 ; 1702 1703 expression_statement: /* C99 6.8.3 */ 1704 expression T_SEMI { 1705 expr($1, false, false, false, false); 1706 seen_fallthrough = false; 1707 } 1708 | T_SEMI { 1709 seen_fallthrough = false; 1710 } 1711 ; 1712 1713 selection_statement: /* C99 6.8.4 */ 1714 if_without_else %prec T_THEN { 1715 save_warning_flags(); 1716 if2(); 1717 if3(false); 1718 } 1719 | if_without_else T_ELSE { 1720 save_warning_flags(); 1721 if2(); 1722 } statement { 1723 clear_warning_flags(); 1724 if3(true); 1725 } 1726 | if_without_else T_ELSE error { 1727 clear_warning_flags(); 1728 if3(false); 1729 } 1730 | switch_expr statement { 1731 clear_warning_flags(); 1732 switch2(); 1733 } 1734 | switch_expr error { 1735 clear_warning_flags(); 1736 switch2(); 1737 } 1738 ; 1739 1740 if_without_else: /* see C99 6.8.4 */ 1741 if_expr statement 1742 | if_expr error 1743 ; 1744 1745 if_expr: /* see C99 6.8.4 */ 1746 T_IF T_LPAREN expression T_RPAREN { 1747 if1($3); 1748 clear_warning_flags(); 1749 } 1750 ; 1751 1752 switch_expr: /* see C99 6.8.4 */ 1753 T_SWITCH T_LPAREN expression T_RPAREN { 1754 switch1($3); 1755 clear_warning_flags(); 1756 } 1757 ; 1758 1759 iteration_statement: /* C99 6.8.5 */ 1760 while_expr statement { 1761 clear_warning_flags(); 1762 while2(); 1763 } 1764 | while_expr error { 1765 clear_warning_flags(); 1766 while2(); 1767 } 1768 | do_statement do_while_expr { 1769 do2($2); 1770 seen_fallthrough = false; 1771 } 1772 | do error { 1773 clear_warning_flags(); 1774 do2(NULL); 1775 } 1776 | for_exprs statement { 1777 clear_warning_flags(); 1778 for2(); 1779 end_declaration_level(); 1780 block_level--; 1781 } 1782 | for_exprs error { 1783 clear_warning_flags(); 1784 for2(); 1785 end_declaration_level(); 1786 block_level--; 1787 } 1788 ; 1789 1790 while_expr: /* see C99 6.8.5 */ 1791 T_WHILE T_LPAREN expression T_RPAREN { 1792 while1($3); 1793 clear_warning_flags(); 1794 } 1795 ; 1796 1797 do_statement: /* see C99 6.8.5 */ 1798 do statement { 1799 clear_warning_flags(); 1800 } 1801 ; 1802 1803 do: /* see C99 6.8.5 */ 1804 T_DO { 1805 do1(); 1806 } 1807 ; 1808 1809 do_while_expr: /* see C99 6.8.5 */ 1810 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1811 $$ = $3; 1812 } 1813 ; 1814 1815 for_start: /* see C99 6.8.5 */ 1816 T_FOR T_LPAREN { 1817 begin_declaration_level(AUTO); 1818 block_level++; 1819 } 1820 ; 1821 1822 for_exprs: /* see C99 6.8.5 */ 1823 for_start 1824 begin_type_declaration_specifiers end_type 1825 notype_init_declarators T_SEMI 1826 expression_opt T_SEMI expression_opt T_RPAREN { 1827 /* variable declaration in for loop */ 1828 c99ism(325); 1829 for1(NULL, $6, $8); 1830 clear_warning_flags(); 1831 } 1832 | for_start 1833 expression_opt T_SEMI 1834 expression_opt T_SEMI 1835 expression_opt T_RPAREN { 1836 for1($2, $4, $6); 1837 clear_warning_flags(); 1838 } 1839 ; 1840 1841 jump_statement: /* C99 6.8.6 */ 1842 goto identifier T_SEMI { 1843 do_goto(getsym($2)); 1844 } 1845 | goto error T_SEMI { 1846 symtyp = FVFT; 1847 } 1848 | T_CONTINUE T_SEMI { 1849 do_continue(); 1850 } 1851 | T_BREAK T_SEMI { 1852 do_break(); 1853 } 1854 | T_RETURN T_SEMI { 1855 do_return(NULL); 1856 } 1857 | T_RETURN expression T_SEMI { 1858 do_return($2); 1859 } 1860 ; 1861 1862 goto: /* see C99 6.8.6 */ 1863 T_GOTO { 1864 symtyp = FLABEL; 1865 } 1866 ; 1867 1868 asm_statement: /* GCC extension */ 1869 T_ASM T_LPAREN read_until_rparen T_SEMI { 1870 setasm(); 1871 } 1872 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1873 setasm(); 1874 } 1875 | T_ASM error 1876 ; 1877 1878 read_until_rparen: /* helper for 'asm_statement' */ 1879 /* empty */ { 1880 read_until_rparen(); 1881 } 1882 ; 1883 1884 translation_unit: /* C99 6.9 */ 1885 external_declaration 1886 | translation_unit external_declaration 1887 ; 1888 1889 external_declaration: /* C99 6.9 */ 1890 function_definition { 1891 global_clean_up_decl(false); 1892 clear_warning_flags(); 1893 } 1894 | top_level_declaration { 1895 global_clean_up_decl(false); 1896 clear_warning_flags(); 1897 } 1898 | asm_statement /* GCC extension */ 1899 | T_SEMI { /* GCC extension */ 1900 if (sflag) { 1901 /* empty declaration */ 1902 error(0); 1903 } else if (!tflag) { 1904 /* empty declaration */ 1905 warning(0); 1906 } 1907 } 1908 ; 1909 1910 /* 1911 * On the top level, lint allows several forms of declarations that it doesn't 1912 * allow in functions. For example, a single ';' is an empty declaration and 1913 * is supported by some compilers, but in a function it would be an empty 1914 * statement, not a declaration. This makes a difference in C90 mode, where 1915 * a statement must not be followed by a declaration. 1916 * 1917 * See 'declaration' for all other declarations. 1918 */ 1919 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1920 begin_type end_type notype_init_declarators T_SEMI { 1921 if (sflag) { 1922 /* old style declaration; add 'int' */ 1923 error(1); 1924 } else if (!tflag) { 1925 /* old style declaration; add 'int' */ 1926 warning(1); 1927 } 1928 } 1929 | declaration 1930 | error T_SEMI { 1931 global_clean_up(); 1932 } 1933 | error T_RBRACE { 1934 global_clean_up(); 1935 } 1936 ; 1937 1938 function_definition: /* C99 6.9.1 */ 1939 func_declarator { 1940 if ($1->s_type->t_tspec != FUNC) { 1941 /* syntax error '%s' */ 1942 error(249, yytext); 1943 YYERROR; 1944 } 1945 if ($1->s_type->t_typedef) { 1946 /* ()-less function definition */ 1947 error(64); 1948 YYERROR; 1949 } 1950 funcdef($1); 1951 block_level++; 1952 begin_declaration_level(ARG); 1953 if (lwarn == LWARN_NONE) 1954 $1->s_used = true; 1955 } arg_declaration_list_opt { 1956 end_declaration_level(); 1957 block_level--; 1958 check_func_lint_directives(); 1959 check_func_old_style_arguments(); 1960 begin_control_statement(CS_FUNCTION_BODY); 1961 } compound_statement { 1962 funcend(); 1963 end_control_statement(CS_FUNCTION_BODY); 1964 } 1965 ; 1966 1967 func_declarator: 1968 begin_type end_type notype_declarator { 1969 /* ^^ There is no check for the missing type-specifier. */ 1970 $$ = $3; 1971 } 1972 | begin_type_declmods end_type notype_declarator { 1973 /* ^^ There is no check for the missing type-specifier. */ 1974 $$ = $3; 1975 } 1976 | begin_type_declaration_specifiers end_type type_declarator { 1977 $$ = $3; 1978 } 1979 ; 1980 1981 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1982 /* empty */ 1983 | arg_declaration_list 1984 ; 1985 1986 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 1987 arg_declaration 1988 | arg_declaration_list arg_declaration 1989 /* XXX or better "arg_declaration error" ? */ 1990 | error 1991 ; 1992 1993 /* 1994 * "arg_declaration" is separated from "declaration" because it 1995 * needs other error handling. 1996 */ 1997 arg_declaration: 1998 begin_type_declmods end_type T_SEMI { 1999 /* empty declaration */ 2000 warning(2); 2001 } 2002 | begin_type_declmods end_type notype_init_declarators T_SEMI 2003 | begin_type_declaration_specifiers end_type T_SEMI { 2004 if (!dcs->d_nonempty_decl) { 2005 /* empty declaration */ 2006 warning(2); 2007 } else { 2008 /* '%s' declared in argument declaration list */ 2009 warning(3, type_name(dcs->d_type)); 2010 } 2011 } 2012 | begin_type_declaration_specifiers end_type 2013 type_init_declarators T_SEMI { 2014 if (dcs->d_nonempty_decl) { 2015 /* '%s' declared in argument declaration list */ 2016 warning(3, type_name(dcs->d_type)); 2017 } 2018 } 2019 | begin_type_declmods error 2020 | begin_type_declaration_specifiers error 2021 ; 2022 2023 gcc_attribute_list_opt: 2024 /* empty */ 2025 | gcc_attribute_list 2026 ; 2027 2028 gcc_attribute_list: 2029 gcc_attribute 2030 | gcc_attribute_list gcc_attribute 2031 ; 2032 2033 gcc_attribute: 2034 T_ATTRIBUTE T_LPAREN T_LPAREN { 2035 in_gcc_attribute = true; 2036 } gcc_attribute_spec_list { 2037 in_gcc_attribute = false; 2038 } T_RPAREN T_RPAREN 2039 ; 2040 2041 gcc_attribute_spec_list: 2042 gcc_attribute_spec 2043 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2044 ; 2045 2046 gcc_attribute_spec: 2047 /* empty */ 2048 | T_AT_ALWAYS_INLINE 2049 | T_AT_ALIAS T_LPAREN string T_RPAREN 2050 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2051 | T_AT_ALIGNED 2052 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2053 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2054 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2055 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2056 | T_AT_COLD 2057 | T_AT_COMMON 2058 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2059 | T_AT_CONSTRUCTOR 2060 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2061 | T_AT_DEPRECATED 2062 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2063 | T_AT_DESTRUCTOR 2064 | T_AT_FALLTHROUGH { 2065 fallthru(1); 2066 } 2067 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2068 constant_expr T_COMMA constant_expr T_RPAREN 2069 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2070 | T_AT_GNU_INLINE 2071 | T_AT_HOT 2072 | T_AT_MALLOC 2073 | T_AT_MAY_ALIAS 2074 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2075 | T_AT_NOINLINE 2076 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2077 | T_AT_NONNULL 2078 | T_AT_NONSTRING 2079 | T_AT_NORETURN 2080 | T_AT_NOTHROW 2081 | T_AT_NO_INSTRUMENT_FUNCTION 2082 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2083 | T_AT_PACKED { 2084 addpacked(); 2085 } 2086 | T_AT_PCS T_LPAREN string T_RPAREN 2087 | T_AT_PURE 2088 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2089 | T_AT_RETURNS_NONNULL 2090 | T_AT_RETURNS_TWICE 2091 | T_AT_SECTION T_LPAREN string T_RPAREN 2092 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2093 | T_AT_SENTINEL 2094 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2095 | T_AT_TUNION 2096 | T_AT_UNUSED { 2097 add_attr_used(); 2098 } 2099 | T_AT_USED { 2100 add_attr_used(); 2101 } 2102 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2103 | T_AT_WARN_UNUSED_RESULT 2104 | T_AT_WEAK 2105 | T_QUAL { 2106 if ($1 != CONST) 2107 yyerror("Bad attribute"); 2108 } 2109 ; 2110 2111 gcc_attribute_bounded: 2112 T_AT_MINBYTES 2113 | T_AT_STRING 2114 | T_AT_BUFFER 2115 ; 2116 2117 gcc_attribute_format: 2118 T_AT_FORMAT_GNU_PRINTF 2119 | T_AT_FORMAT_PRINTF 2120 | T_AT_FORMAT_SCANF 2121 | T_AT_FORMAT_STRFMON 2122 | T_AT_FORMAT_STRFTIME 2123 | T_AT_FORMAT_SYSLOG 2124 ; 2125 2126 %% 2127 2128 /* ARGSUSED */ 2129 int 2130 yyerror(const char *msg) 2131 { 2132 /* syntax error '%s' */ 2133 error(249, yytext); 2134 if (++sytxerr >= 5) 2135 norecover(); 2136 return 0; 2137 } 2138 2139 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2140 || (defined(YYDEBUG) && defined(YYBISON)) 2141 static const char * 2142 cgram_to_string(int token, YYSTYPE val) 2143 { 2144 static const char *tqual_name[] = { 2145 "const", "volatile", "restrict", "_Thread_local" 2146 }; 2147 2148 switch (token) { 2149 case T_INCDEC: 2150 case T_MULTIPLICATIVE: 2151 case T_ADDITIVE: 2152 case T_SHIFT: 2153 case T_RELATIONAL: 2154 case T_EQUALITY: 2155 case T_OPASSIGN: 2156 return modtab[val.y_op].m_name; 2157 case T_SCLASS: 2158 return scl_name(val.y_scl); 2159 case T_TYPE: 2160 case T_STRUCT_OR_UNION: 2161 return tspec_name(val.y_tspec); 2162 case T_QUAL: 2163 return tqual_name[val.y_tqual]; 2164 case T_NAME: 2165 return val.y_name->sb_name; 2166 default: 2167 return "<none>"; 2168 } 2169 } 2170 #endif 2171 2172 #if defined(YYDEBUG) && defined(YYBISON) 2173 static void 2174 cgram_print(FILE *output, int token, YYSTYPE val) 2175 { 2176 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2177 } 2178 #endif 2179 2180 static void 2181 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2182 { 2183 declare(decl, initflg, renaming); 2184 if (renaming != NULL) 2185 freeyyv(&renaming, T_NAME); 2186 } 2187 2188 /* 2189 * Discard all input tokens up to and including the next 2190 * unmatched right paren 2191 */ 2192 static void 2193 read_until_rparen(void) 2194 { 2195 int level; 2196 2197 if (yychar < 0) 2198 yychar = yylex(); 2199 freeyyv(&yylval, yychar); 2200 2201 level = 1; 2202 while (yychar != T_RPAREN || --level > 0) { 2203 if (yychar == T_LPAREN) { 2204 level++; 2205 } else if (yychar <= 0) { 2206 break; 2207 } 2208 freeyyv(&yylval, yychar = yylex()); 2209 } 2210 2211 yyclearin; 2212 } 2213 2214 static sym_t * 2215 symbolrename(sym_t *s, sbuf_t *sb) 2216 { 2217 if (sb != NULL) 2218 s->s_rename = sb->sb_name; 2219 return s; 2220 } 2221
Indexes created Thu Oct 02 14:10:14 GMT 2025