cgram.y revision 1.364
1 %{ 2 /* $NetBSD: cgram.y,v 1.364 2021/09/14 19:44:40 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 1.364 2021/09/14 19:44:40 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 214 215 %token T_ATTRIBUTE 216 %token T_AT_ALIAS 217 %token T_AT_ALIGNED 218 %token T_AT_ALLOC_SIZE 219 %token T_AT_ALWAYS_INLINE 220 %token T_AT_BOUNDED 221 %token T_AT_BUFFER 222 %token T_AT_COLD 223 %token T_AT_COMMON 224 %token T_AT_CONSTRUCTOR 225 %token T_AT_DEPRECATED 226 %token T_AT_DESTRUCTOR 227 %token T_AT_FALLTHROUGH 228 %token T_AT_FORMAT 229 %token T_AT_FORMAT_ARG 230 %token T_AT_FORMAT_GNU_PRINTF 231 %token T_AT_FORMAT_PRINTF 232 %token T_AT_FORMAT_SCANF 233 %token T_AT_FORMAT_STRFMON 234 %token T_AT_FORMAT_STRFTIME 235 %token T_AT_FORMAT_SYSLOG 236 %token T_AT_GNU_INLINE 237 %token T_AT_HOT 238 %token T_AT_MALLOC 239 %token T_AT_MAY_ALIAS 240 %token T_AT_MINBYTES 241 %token T_AT_MODE 242 %token T_AT_NOINLINE 243 %token T_AT_NONNULL 244 %token T_AT_NONSTRING 245 %token T_AT_NORETURN 246 %token T_AT_NOTHROW 247 %token T_AT_NO_INSTRUMENT_FUNCTION 248 %token T_AT_OPTIMIZE 249 %token T_AT_PACKED 250 %token T_AT_PCS 251 %token T_AT_PURE 252 %token T_AT_REGPARM 253 %token T_AT_RETURNS_NONNULL 254 %token T_AT_RETURNS_TWICE 255 %token T_AT_SECTION 256 %token T_AT_SENTINEL 257 %token T_AT_STRING 258 %token T_AT_TLS_MODEL 259 %token T_AT_TUNION 260 %token T_AT_UNUSED 261 %token T_AT_USED 262 %token T_AT_VISIBILITY 263 %token T_AT_WARN_UNUSED_RESULT 264 %token T_AT_WEAK 265 266 %left T_THEN 267 %left T_ELSE 268 %right T_QUEST T_COLON 269 %left T_LOGOR 270 %left T_LOGAND 271 %left T_BITOR 272 %left T_BITXOR 273 %left T_AMPER 274 %left T_EQUALITY 275 %left T_RELATIONAL 276 %left T_SHIFT 277 %left T_ADDITIVE 278 %left T_ASTERISK T_MULTIPLICATIVE 279 280 %token <y_name> T_NAME 281 %token <y_name> T_TYPENAME 282 %token <y_val> T_CON 283 %token <y_string> T_STRING 284 285 %type <y_sym> identifier_sym 286 %type <y_name> identifier 287 %type <y_string> string 288 %type <y_string> string2 289 290 %type <y_tnode> primary_expression 291 %type <y_tnode> generic_selection 292 %type <y_generic> generic_assoc_list 293 %type <y_generic> generic_association 294 %type <y_tnode> postfix_expression 295 %type <y_tnode> gcc_statement_expr_list 296 %type <y_tnode> gcc_statement_expr_item 297 %type <y_op> point_or_arrow 298 %type <y_tnode> argument_expression_list 299 %type <y_tnode> unary_expression 300 %type <y_tnode> cast_expression 301 %type <y_tnode> conditional_expression 302 %type <y_tnode> assignment_expression 303 %type <y_tnode> expression_opt 304 %type <y_tnode> expression 305 %type <y_tnode> constant_expr 306 307 %type <y_type> begin_type_typespec 308 %type <y_type> type_specifier 309 %type <y_type> notype_type_specifier 310 %type <y_type> struct_or_union_specifier 311 %type <y_tspec> struct_or_union 312 %type <y_sym> braced_struct_declaration_list 313 %type <y_sym> struct_declaration_list_with_rbrace 314 %type <y_sym> struct_declaration_list 315 %type <y_sym> struct_declaration 316 %type <y_sym> notype_struct_declarators 317 %type <y_sym> type_struct_declarators 318 %type <y_sym> notype_struct_declarator 319 %type <y_sym> type_struct_declarator 320 %type <y_type> enum_specifier 321 %type <y_sym> enum_declaration 322 %type <y_sym> enums_with_opt_comma 323 %type <y_sym> enumerator_list 324 %type <y_sym> enumerator 325 %type <y_qual_ptr> type_qualifier 326 %type <y_qual_ptr> pointer 327 %type <y_qual_ptr> asterisk 328 %type <y_qual_ptr> type_qualifier_list_opt 329 %type <y_qual_ptr> type_qualifier_list 330 %type <y_sym> notype_declarator 331 %type <y_sym> type_declarator 332 %type <y_sym> notype_direct_declarator 333 %type <y_sym> type_direct_declarator 334 %type <y_sym> type_param_declarator 335 %type <y_sym> notype_param_declarator 336 %type <y_sym> direct_param_declarator 337 %type <y_sym> direct_notype_param_declarator 338 %type <y_sym> param_list 339 %type <y_array_size> array_size_opt 340 %type <y_tnode> array_size 341 %type <y_sym> identifier_list 342 %type <y_type> type_name 343 %type <y_sym> abstract_declaration 344 %type <y_sym> abstract_declarator 345 %type <y_sym> direct_abstract_declarator 346 %type <y_sym> abstract_decl_param_list 347 %type <y_sym> vararg_parameter_type_list 348 %type <y_sym> parameter_type_list 349 %type <y_sym> parameter_declaration 350 %type <y_range> range 351 %type <y_name> asm_or_symbolrename_opt 352 353 %type <y_seen_statement> block_item_list 354 %type <y_seen_statement> block_item 355 %type <y_tnode> do_while_expr 356 %type <y_sym> func_declarator 357 358 %{ 359 #if defined(YYDEBUG) && defined(YYBISON) 360 static void cgram_print(FILE *, int, YYSTYPE); 361 #endif 362 %} 363 364 %% 365 366 program: 367 /* empty */ { 368 if (sflag) { 369 /* empty translation unit */ 370 error(272); 371 } else if (!tflag) { 372 /* empty translation unit */ 373 warning(272); 374 } 375 } 376 | translation_unit 377 ; 378 379 identifier_sym: /* helper for struct/union/enum */ 380 identifier { 381 $$ = getsym($1); 382 } 383 ; 384 385 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 386 identifier: 387 T_NAME { 388 debug_step("cgram: name '%s'", $1->sb_name); 389 $$ = $1; 390 } 391 | T_TYPENAME { 392 debug_step("cgram: typename '%s'", $1->sb_name); 393 $$ = $1; 394 } 395 ; 396 397 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 398 string: 399 T_STRING 400 | T_STRING string2 { 401 $$ = cat_strings($1, $2); 402 } 403 ; 404 405 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 406 string2: 407 T_STRING { 408 if (tflag) { 409 /* concatenated strings are illegal in traditional C */ 410 warning(219); 411 } 412 $$ = $1; 413 } 414 | string2 T_STRING { 415 $$ = cat_strings($1, $2); 416 } 417 ; 418 419 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 420 primary_expression: 421 T_NAME { 422 /* XXX really necessary? */ 423 if (yychar < 0) 424 yychar = yylex(); 425 $$ = build_name(getsym($1), yychar); 426 } 427 | T_CON { 428 $$ = build_constant(gettyp($1->v_tspec), $1); 429 } 430 | string { 431 $$ = build_string($1); 432 } 433 | T_LPAREN expression T_RPAREN { 434 if ($2 != NULL) 435 $2->tn_parenthesized = true; 436 $$ = $2; 437 } 438 | generic_selection 439 /* GCC primary-expression, see c_parser_postfix_expression */ 440 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 441 symtyp = FMEMBER; 442 $$ = build_offsetof($3, getsym($5)); 443 } 444 ; 445 446 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 447 generic_selection: 448 T_GENERIC T_LPAREN assignment_expression T_COMMA 449 generic_assoc_list T_RPAREN { 450 /* generic selection requires C11 or later */ 451 c11ism(345); 452 $$ = build_generic_selection($3, $5); 453 } 454 ; 455 456 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 457 generic_assoc_list: 458 generic_association 459 | generic_assoc_list T_COMMA generic_association { 460 $3->ga_prev = $1; 461 $$ = $3; 462 } 463 ; 464 465 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 466 generic_association: 467 type_name T_COLON assignment_expression { 468 $$ = getblk(sizeof(*$$)); 469 $$->ga_arg = $1; 470 $$->ga_result = $3; 471 } 472 | T_DEFAULT T_COLON assignment_expression { 473 $$ = getblk(sizeof(*$$)); 474 $$->ga_arg = NULL; 475 $$->ga_result = $3; 476 } 477 ; 478 479 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 480 postfix_expression: 481 primary_expression 482 | postfix_expression T_LBRACK expression T_RBRACK { 483 $$ = build_unary(INDIR, build_binary($1, PLUS, $3)); 484 } 485 | postfix_expression T_LPAREN T_RPAREN { 486 $$ = build_function_call($1, NULL); 487 } 488 | postfix_expression T_LPAREN argument_expression_list T_RPAREN { 489 $$ = build_function_call($1, $3); 490 } 491 | postfix_expression point_or_arrow T_NAME { 492 $$ = build_member_access($1, $2, $3); 493 } 494 | postfix_expression T_INCDEC { 495 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $1); 496 } 497 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 498 sym_t *tmp = mktempsym($2); 499 begin_initialization(tmp); 500 cgram_declare(tmp, true, NULL); 501 } init_lbrace initializer_list comma_opt init_rbrace { 502 if (!Sflag) 503 /* compound literals are a C9X/GCC extension */ 504 gnuism(319); 505 $$ = build_name(*current_initsym(), 0); 506 end_initialization(); 507 } 508 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 509 block_level--; 510 mem_block_level--; 511 begin_initialization(mktempsym(dup_type($3->tn_type))); 512 mem_block_level++; 513 block_level++; 514 /* ({ }) is a GCC extension */ 515 gnuism(320); 516 } compound_statement_rbrace T_RPAREN { 517 $$ = build_name(*current_initsym(), 0); 518 end_initialization(); 519 } 520 ; 521 522 comma_opt: /* helper for 'postfix_expression' */ 523 /* empty */ 524 | T_COMMA 525 ; 526 527 /* 528 * The inner part of a GCC statement-expression of the form ({ ... }). 529 * 530 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 531 */ 532 gcc_statement_expr_list: 533 gcc_statement_expr_item 534 | gcc_statement_expr_list gcc_statement_expr_item { 535 $$ = $2; 536 } 537 ; 538 539 gcc_statement_expr_item: 540 declaration_or_error { 541 clear_warning_flags(); 542 $$ = NULL; 543 } 544 | non_expr_statement { 545 $$ = expr_zalloc_tnode(); 546 $$->tn_type = gettyp(VOID); 547 } 548 | expression T_SEMI { 549 if ($1 == NULL) { /* in case of syntax errors */ 550 $$ = expr_zalloc_tnode(); 551 $$->tn_type = gettyp(VOID); 552 } else { 553 /* XXX: do that only on the last name */ 554 if ($1->tn_op == NAME) 555 $1->tn_sym->s_used = true; 556 expr($1, false, false, false, false); 557 seen_fallthrough = false; 558 $$ = $1; 559 } 560 } 561 ; 562 563 point_or_arrow: /* helper for 'postfix_expression' */ 564 T_POINT { 565 symtyp = FMEMBER; 566 $$ = POINT; 567 } 568 | T_ARROW { 569 symtyp = FMEMBER; 570 $$ = ARROW; 571 } 572 ; 573 574 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 575 argument_expression_list: 576 assignment_expression { 577 $$ = build_function_argument(NULL, $1); 578 } 579 | argument_expression_list T_COMMA assignment_expression { 580 $$ = build_function_argument($1, $3); 581 } 582 ; 583 584 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 585 unary_expression: 586 postfix_expression 587 | T_INCDEC unary_expression { 588 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2); 589 } 590 | T_AMPER cast_expression { 591 $$ = build_unary(ADDR, $2); 592 } 593 | T_ASTERISK cast_expression { 594 $$ = build_unary(INDIR, $2); 595 } 596 | T_ADDITIVE cast_expression { 597 if (tflag && $1 == PLUS) { 598 /* unary + is illegal in traditional C */ 599 warning(100); 600 } 601 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2); 602 } 603 | T_COMPLEMENT cast_expression { 604 $$ = build_unary(COMPL, $2); 605 } 606 | T_LOGNOT cast_expression { 607 $$ = build_unary(NOT, $2); 608 } 609 | T_REAL cast_expression { /* GCC c_parser_unary_expression */ 610 $$ = build_unary(REAL, $2); 611 } 612 | T_IMAG cast_expression { /* GCC c_parser_unary_expression */ 613 $$ = build_unary(IMAG, $2); 614 } 615 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 616 $$ = $2; 617 } 618 | T_SIZEOF unary_expression { 619 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 620 if ($$ != NULL) 621 check_expr_misc($2, 622 false, false, false, false, false, true); 623 } 624 | T_SIZEOF T_LPAREN type_name T_RPAREN { 625 $$ = build_sizeof($3); 626 } 627 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 628 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 629 /* TODO: c11ism */ 630 $$ = build_alignof($3); 631 } 632 ; 633 634 /* The rule 'unary_operator' is inlined into unary_expression. */ 635 636 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 637 cast_expression: 638 unary_expression 639 | T_LPAREN type_name T_RPAREN cast_expression { 640 $$ = cast($4, $2); 641 } 642 ; 643 644 expression_opt: 645 /* empty */ { 646 $$ = NULL; 647 } 648 | expression 649 ; 650 651 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 652 /* 'conditional_expression' also implements 'additive_expression'. */ 653 /* 'conditional_expression' also implements 'shift_expression'. */ 654 /* 'conditional_expression' also implements 'relational_expression'. */ 655 /* 'conditional_expression' also implements 'equality_expression'. */ 656 /* 'conditional_expression' also implements 'AND_expression'. */ 657 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 658 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 659 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 660 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 661 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 662 conditional_expression: 663 cast_expression 664 | conditional_expression T_ASTERISK conditional_expression { 665 $$ = build_binary($1, MULT, $3); 666 } 667 | conditional_expression T_MULTIPLICATIVE conditional_expression { 668 $$ = build_binary($1, $2, $3); 669 } 670 | conditional_expression T_ADDITIVE conditional_expression { 671 $$ = build_binary($1, $2, $3); 672 } 673 | conditional_expression T_SHIFT conditional_expression { 674 $$ = build_binary($1, $2, $3); 675 } 676 | conditional_expression T_RELATIONAL conditional_expression { 677 $$ = build_binary($1, $2, $3); 678 } 679 | conditional_expression T_EQUALITY conditional_expression { 680 $$ = build_binary($1, $2, $3); 681 } 682 | conditional_expression T_AMPER conditional_expression { 683 $$ = build_binary($1, BITAND, $3); 684 } 685 | conditional_expression T_BITXOR conditional_expression { 686 $$ = build_binary($1, BITXOR, $3); 687 } 688 | conditional_expression T_BITOR conditional_expression { 689 $$ = build_binary($1, BITOR, $3); 690 } 691 | conditional_expression T_LOGAND conditional_expression { 692 $$ = build_binary($1, LOGAND, $3); 693 } 694 | conditional_expression T_LOGOR conditional_expression { 695 $$ = build_binary($1, LOGOR, $3); 696 } 697 | conditional_expression T_QUEST expression 698 T_COLON conditional_expression { 699 $$ = build_binary($1, QUEST, build_binary($3, COLON, $5)); 700 } 701 ; 702 703 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 704 assignment_expression: 705 conditional_expression 706 | unary_expression T_ASSIGN assignment_expression { 707 $$ = build_binary($1, ASSIGN, $3); 708 } 709 | unary_expression T_OPASSIGN assignment_expression { 710 $$ = build_binary($1, $2, $3); 711 } 712 ; 713 714 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 715 expression: 716 assignment_expression 717 | expression T_COMMA assignment_expression { 718 $$ = build_binary($1, COMMA, $3); 719 } 720 ; 721 722 constant_expr_list_opt: /* helper for gcc_attribute */ 723 /* empty */ 724 | constant_expr_list 725 ; 726 727 constant_expr_list: /* helper for gcc_attribute */ 728 constant_expr 729 | constant_expr_list T_COMMA constant_expr 730 ; 731 732 constant_expr: /* C99 6.6 */ 733 conditional_expression 734 ; 735 736 declaration_or_error: 737 declaration 738 | error T_SEMI 739 ; 740 741 declaration: /* C99 6.7 */ 742 begin_type_declmods end_type T_SEMI { 743 if (dcs->d_scl == TYPEDEF) { 744 /* typedef declares no type name */ 745 warning(72); 746 } else { 747 /* empty declaration */ 748 warning(2); 749 } 750 } 751 | begin_type_declmods end_type notype_init_declarators T_SEMI 752 /* ^^ There is no check for the missing type-specifier. */ 753 | begin_type_declaration_specifiers end_type T_SEMI { 754 if (dcs->d_scl == TYPEDEF) { 755 /* typedef declares no type name */ 756 warning(72); 757 } else if (!dcs->d_nonempty_decl) { 758 /* empty declaration */ 759 warning(2); 760 } 761 } 762 | begin_type_declaration_specifiers end_type 763 type_init_declarators T_SEMI 764 ; 765 766 begin_type_declaration_specifiers: /* see C99 6.7 */ 767 begin_type_typespec { 768 add_type($1); 769 } 770 | begin_type_declmods type_specifier { 771 add_type($2); 772 } 773 | type_attribute begin_type_declaration_specifiers 774 | begin_type_declaration_specifiers declmod 775 | begin_type_declaration_specifiers notype_type_specifier { 776 add_type($2); 777 } 778 ; 779 780 begin_type_declmods: /* see C99 6.7 */ 781 begin_type T_QUAL { 782 add_qualifier($2); 783 } 784 | begin_type T_SCLASS { 785 add_storage_class($2); 786 } 787 | begin_type_declmods declmod 788 ; 789 790 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 791 begin_type_specifier_qualifier_list_postfix 792 | type_attribute_list begin_type_specifier_qualifier_list_postfix 793 ; 794 795 begin_type_specifier_qualifier_list_postfix: 796 begin_type_typespec { 797 add_type($1); 798 } 799 | begin_type_qualifier_list type_specifier { 800 add_type($2); 801 } 802 | begin_type_specifier_qualifier_list_postfix T_QUAL { 803 add_qualifier($2); 804 } 805 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 806 add_type($2); 807 } 808 | begin_type_specifier_qualifier_list_postfix type_attribute 809 ; 810 811 begin_type_typespec: 812 begin_type notype_type_specifier { 813 $$ = $2; 814 } 815 | T_TYPENAME begin_type { 816 $$ = getsym($1)->s_type; 817 } 818 ; 819 820 begin_type_qualifier_list: 821 begin_type T_QUAL { 822 add_qualifier($2); 823 } 824 | begin_type_qualifier_list T_QUAL { 825 add_qualifier($2); 826 } 827 ; 828 829 declmod: 830 T_QUAL { 831 add_qualifier($1); 832 } 833 | T_SCLASS { 834 add_storage_class($1); 835 } 836 | type_attribute_list 837 ; 838 839 type_attribute_list: 840 type_attribute 841 | type_attribute_list type_attribute 842 ; 843 844 type_attribute_opt: 845 /* empty */ 846 | type_attribute 847 ; 848 849 type_attribute: /* See C11 6.7 declaration-specifiers */ 850 gcc_attribute 851 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 852 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 853 | T_PACKED { 854 addpacked(); 855 } 856 | T_NORETURN 857 ; 858 859 begin_type: 860 /* empty */ { 861 begin_type(); 862 } 863 ; 864 865 end_type: 866 /* empty */ { 867 end_type(); 868 } 869 ; 870 871 type_specifier: /* C99 6.7.2 */ 872 notype_type_specifier 873 | T_TYPENAME { 874 $$ = getsym($1)->s_type; 875 } 876 ; 877 878 notype_type_specifier: /* see C99 6.7.2 */ 879 T_TYPE { 880 $$ = gettyp($1); 881 } 882 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 883 $$ = $3->tn_type; 884 } 885 | struct_or_union_specifier { 886 end_declaration_level(); 887 $$ = $1; 888 } 889 | enum_specifier { 890 end_declaration_level(); 891 $$ = $1; 892 } 893 ; 894 895 struct_or_union_specifier: /* C99 6.7.2.1 */ 896 struct_or_union identifier_sym { 897 /* 898 * STDC requires that "struct a;" always introduces 899 * a new tag if "a" is not declared at current level 900 * 901 * yychar is valid because otherwise the parser would not 902 * have been able to decide if it must shift or reduce 903 */ 904 $$ = mktag($2, $1, false, yychar == T_SEMI); 905 } 906 | struct_or_union identifier_sym { 907 dcs->d_tagtyp = mktag($2, $1, true, false); 908 } braced_struct_declaration_list { 909 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 910 } 911 | struct_or_union { 912 dcs->d_tagtyp = mktag(NULL, $1, true, false); 913 } braced_struct_declaration_list { 914 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 915 } 916 | struct_or_union error { 917 symtyp = FVFT; 918 $$ = gettyp(INT); 919 } 920 ; 921 922 struct_or_union: /* C99 6.7.2.1 */ 923 T_STRUCT_OR_UNION { 924 symtyp = FTAG; 925 begin_declaration_level($1 == STRUCT ? MOS : MOU); 926 dcs->d_offset = 0; 927 dcs->d_sou_align_in_bits = CHAR_SIZE; 928 $$ = $1; 929 } 930 | struct_or_union type_attribute 931 ; 932 933 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 934 struct_declaration_lbrace struct_declaration_list_with_rbrace { 935 $$ = $2; 936 } 937 ; 938 939 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 940 T_LBRACE { 941 symtyp = FVFT; 942 } 943 ; 944 945 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 946 struct_declaration_list T_RBRACE 947 | T_RBRACE { 948 /* XXX: This is not allowed by any C standard. */ 949 $$ = NULL; 950 } 951 ; 952 953 struct_declaration_list: /* C99 6.7.2.1 */ 954 struct_declaration 955 | struct_declaration_list struct_declaration { 956 $$ = lnklst($1, $2); 957 } 958 ; 959 960 struct_declaration: /* C99 6.7.2.1 */ 961 begin_type_qualifier_list end_type { 962 /* ^^ There is no check for the missing type-specifier. */ 963 /* too late, i know, but getsym() compensates it */ 964 symtyp = FMEMBER; 965 } notype_struct_declarators type_attribute_opt T_SEMI { 966 symtyp = FVFT; 967 $$ = $4; 968 } 969 | begin_type_specifier_qualifier_list end_type { 970 symtyp = FMEMBER; 971 } type_struct_declarators type_attribute_opt T_SEMI { 972 symtyp = FVFT; 973 $$ = $4; 974 } 975 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 976 /* syntax error '%s' */ 977 error(249, "member without type"); 978 $$ = NULL; 979 } 980 | begin_type_specifier_qualifier_list end_type type_attribute_opt 981 T_SEMI { 982 symtyp = FVFT; 983 if (!Sflag) 984 /* anonymous struct/union members is a C9X feature */ 985 warning(49); 986 if (is_struct_or_union(dcs->d_type->t_tspec)) { 987 $$ = dcs->d_type->t_str->sou_first_member; 988 /* add all the members of the anonymous struct/union */ 989 anonymize($$); 990 } else { 991 /* syntax error '%s' */ 992 error(249, "unnamed member"); 993 $$ = NULL; 994 } 995 } 996 | error T_SEMI { 997 symtyp = FVFT; 998 $$ = NULL; 999 } 1000 ; 1001 1002 notype_struct_declarators: 1003 notype_struct_declarator { 1004 $$ = declarator_1_struct_union($1); 1005 } 1006 | notype_struct_declarators { 1007 symtyp = FMEMBER; 1008 } T_COMMA type_struct_declarator { 1009 $$ = lnklst($1, declarator_1_struct_union($4)); 1010 } 1011 ; 1012 1013 type_struct_declarators: 1014 type_struct_declarator { 1015 $$ = declarator_1_struct_union($1); 1016 } 1017 | type_struct_declarators { 1018 symtyp = FMEMBER; 1019 } T_COMMA type_struct_declarator { 1020 $$ = lnklst($1, declarator_1_struct_union($4)); 1021 } 1022 ; 1023 1024 notype_struct_declarator: 1025 notype_declarator 1026 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1027 $$ = bitfield($1, to_int_constant($3, true)); 1028 } 1029 | { 1030 symtyp = FVFT; 1031 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1032 $$ = bitfield(NULL, to_int_constant($3, true)); 1033 } 1034 ; 1035 1036 type_struct_declarator: 1037 type_declarator 1038 | type_declarator T_COLON constant_expr { 1039 $$ = bitfield($1, to_int_constant($3, true)); 1040 } 1041 | { 1042 symtyp = FVFT; 1043 } T_COLON constant_expr { 1044 $$ = bitfield(NULL, to_int_constant($3, true)); 1045 } 1046 ; 1047 1048 enum_specifier: /* C99 6.7.2.2 */ 1049 enum gcc_attribute_list_opt identifier_sym { 1050 $$ = mktag($3, ENUM, false, false); 1051 } 1052 | enum gcc_attribute_list_opt identifier_sym { 1053 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1054 } enum_declaration /*gcc_attribute_list_opt*/ { 1055 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1056 } 1057 | enum gcc_attribute_list_opt { 1058 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1059 } enum_declaration /*gcc_attribute_list_opt*/ { 1060 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1061 } 1062 | enum error { 1063 symtyp = FVFT; 1064 $$ = gettyp(INT); 1065 } 1066 ; 1067 1068 enum: /* helper for C99 6.7.2.2 */ 1069 T_ENUM { 1070 symtyp = FTAG; 1071 begin_declaration_level(CTCONST); 1072 } 1073 ; 1074 1075 enum_declaration: /* helper for C99 6.7.2.2 */ 1076 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1077 $$ = $2; 1078 } 1079 ; 1080 1081 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1082 T_LBRACE { 1083 symtyp = FVFT; 1084 enumval = 0; 1085 } 1086 ; 1087 1088 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1089 enumerator_list 1090 | enumerator_list T_COMMA { 1091 if (sflag) { 1092 /* trailing ',' prohibited in enum declaration */ 1093 error(54); 1094 } else { 1095 /* trailing ',' prohibited in enum declaration */ 1096 c99ism(54); 1097 } 1098 $$ = $1; 1099 } 1100 ; 1101 1102 enumerator_list: /* C99 6.7.2.2 */ 1103 enumerator 1104 | enumerator_list T_COMMA enumerator { 1105 $$ = lnklst($1, $3); 1106 } 1107 | error { 1108 $$ = NULL; 1109 } 1110 ; 1111 1112 enumerator: /* C99 6.7.2.2 */ 1113 identifier_sym gcc_attribute_list_opt { 1114 $$ = enumeration_constant($1, enumval, true); 1115 } 1116 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1117 $$ = enumeration_constant($1, to_int_constant($4, true), 1118 false); 1119 } 1120 ; 1121 1122 type_qualifier: /* C99 6.7.3 */ 1123 T_QUAL { 1124 $$ = xcalloc(1, sizeof(*$$)); 1125 if ($1 == CONST) 1126 $$->p_const = true; 1127 if ($1 == VOLATILE) 1128 $$->p_volatile = true; 1129 } 1130 ; 1131 1132 pointer: /* C99 6.7.5 */ 1133 asterisk type_qualifier_list_opt { 1134 $$ = merge_qualified_pointer($1, $2); 1135 } 1136 | asterisk type_qualifier_list_opt pointer { 1137 $$ = merge_qualified_pointer($1, $2); 1138 $$ = merge_qualified_pointer($$, $3); 1139 } 1140 ; 1141 1142 asterisk: /* helper for 'pointer' */ 1143 T_ASTERISK { 1144 $$ = xcalloc(1, sizeof(*$$)); 1145 $$->p_pointer = true; 1146 } 1147 ; 1148 1149 type_qualifier_list_opt: /* see C99 6.7.5 */ 1150 /* empty */ { 1151 $$ = NULL; 1152 } 1153 | type_qualifier_list 1154 ; 1155 1156 type_qualifier_list: /* C99 6.7.5 */ 1157 type_qualifier 1158 | type_qualifier_list type_qualifier { 1159 $$ = merge_qualified_pointer($1, $2); 1160 } 1161 ; 1162 1163 /* 1164 * For an explanation of 'notype' in the following rules, see 1165 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1166 */ 1167 1168 notype_init_declarators: 1169 notype_init_declarator 1170 | notype_init_declarators T_COMMA type_init_declarator 1171 ; 1172 1173 type_init_declarators: 1174 type_init_declarator 1175 | type_init_declarators T_COMMA type_init_declarator 1176 ; 1177 1178 notype_init_declarator: 1179 notype_declarator asm_or_symbolrename_opt { 1180 cgram_declare($1, false, $2); 1181 check_size($1); 1182 } 1183 | notype_declarator asm_or_symbolrename_opt { 1184 begin_initialization($1); 1185 cgram_declare($1, true, $2); 1186 } T_ASSIGN initializer { 1187 check_size($1); 1188 end_initialization(); 1189 } 1190 ; 1191 1192 type_init_declarator: 1193 type_declarator asm_or_symbolrename_opt { 1194 cgram_declare($1, false, $2); 1195 check_size($1); 1196 } 1197 | type_declarator asm_or_symbolrename_opt { 1198 begin_initialization($1); 1199 cgram_declare($1, true, $2); 1200 } T_ASSIGN initializer { 1201 check_size($1); 1202 end_initialization(); 1203 } 1204 ; 1205 1206 notype_declarator: 1207 notype_direct_declarator 1208 | pointer notype_direct_declarator { 1209 $$ = add_pointer($2, $1); 1210 } 1211 ; 1212 1213 type_declarator: 1214 type_direct_declarator 1215 | pointer type_direct_declarator { 1216 $$ = add_pointer($2, $1); 1217 } 1218 ; 1219 1220 notype_direct_declarator: 1221 T_NAME { 1222 $$ = declarator_name(getsym($1)); 1223 } 1224 | T_LPAREN type_declarator T_RPAREN { 1225 $$ = $2; 1226 } 1227 | type_attribute notype_direct_declarator { 1228 $$ = $2; 1229 } 1230 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1231 $$ = add_array($1, $3.has_dim, $3.dim); 1232 } 1233 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1234 $$ = add_function(symbolrename($1, $3), $2); 1235 end_declaration_level(); 1236 block_level--; 1237 } 1238 | notype_direct_declarator type_attribute 1239 ; 1240 1241 type_direct_declarator: 1242 identifier { 1243 $$ = declarator_name(getsym($1)); 1244 } 1245 | T_LPAREN type_declarator T_RPAREN { 1246 $$ = $2; 1247 } 1248 | type_attribute type_direct_declarator { 1249 $$ = $2; 1250 } 1251 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1252 $$ = add_array($1, $3.has_dim, $3.dim); 1253 } 1254 | type_direct_declarator param_list asm_or_symbolrename_opt { 1255 $$ = add_function(symbolrename($1, $3), $2); 1256 end_declaration_level(); 1257 block_level--; 1258 } 1259 | type_direct_declarator type_attribute 1260 ; 1261 1262 /* 1263 * The two distinct rules type_param_declarator and notype_param_declarator 1264 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1265 * always treated as a typename, not an argument name. For example, after 1266 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1267 * "f(int (double));", not "f(int a);". 1268 */ 1269 type_param_declarator: 1270 direct_param_declarator 1271 | pointer direct_param_declarator { 1272 $$ = add_pointer($2, $1); 1273 } 1274 ; 1275 1276 notype_param_declarator: 1277 direct_notype_param_declarator 1278 | pointer direct_notype_param_declarator { 1279 $$ = add_pointer($2, $1); 1280 } 1281 ; 1282 1283 direct_param_declarator: 1284 identifier type_attribute_list { 1285 $$ = declarator_name(getsym($1)); 1286 } 1287 | identifier { 1288 $$ = declarator_name(getsym($1)); 1289 } 1290 | T_LPAREN notype_param_declarator T_RPAREN { 1291 $$ = $2; 1292 } 1293 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1294 gcc_attribute_list_opt { 1295 $$ = add_array($1, $3.has_dim, $3.dim); 1296 } 1297 | direct_param_declarator param_list asm_or_symbolrename_opt { 1298 $$ = add_function(symbolrename($1, $3), $2); 1299 end_declaration_level(); 1300 block_level--; 1301 } 1302 ; 1303 1304 direct_notype_param_declarator: 1305 identifier { 1306 $$ = declarator_name(getsym($1)); 1307 } 1308 | T_LPAREN notype_param_declarator T_RPAREN { 1309 $$ = $2; 1310 } 1311 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1312 $$ = add_array($1, $3.has_dim, $3.dim); 1313 } 1314 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1315 $$ = add_function(symbolrename($1, $3), $2); 1316 end_declaration_level(); 1317 block_level--; 1318 } 1319 ; 1320 1321 param_list: 1322 id_list_lparen identifier_list T_RPAREN { 1323 $$ = $2; 1324 } 1325 | abstract_decl_param_list 1326 ; 1327 1328 id_list_lparen: 1329 T_LPAREN { 1330 block_level++; 1331 begin_declaration_level(PROTO_ARG); 1332 } 1333 ; 1334 1335 array_size_opt: 1336 /* empty */ { 1337 $$.has_dim = false; 1338 $$.dim = 0; 1339 } 1340 | T_ASTERISK { 1341 /* since C99; variable length array of unspecified size */ 1342 $$.has_dim = false; /* TODO: maybe change to true */ 1343 $$.dim = 0; /* just as a placeholder */ 1344 } 1345 | array_size { 1346 $$.has_dim = true; 1347 $$.dim = to_int_constant($1, false); 1348 } 1349 ; 1350 1351 array_size: 1352 type_qualifier_list_opt T_SCLASS constant_expr { 1353 /* C11 6.7.6.3p7 */ 1354 if ($2 != STATIC) 1355 yyerror("Bad attribute"); 1356 /* static array size is a C11 extension */ 1357 c11ism(343); 1358 $$ = $3; 1359 } 1360 | constant_expr 1361 ; 1362 1363 identifier_list: /* C99 6.7.5 */ 1364 T_NAME { 1365 $$ = old_style_function_name(getsym($1)); 1366 } 1367 | identifier_list T_COMMA T_NAME { 1368 $$ = lnklst($1, old_style_function_name(getsym($3))); 1369 } 1370 | identifier_list error 1371 ; 1372 1373 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1374 type_name: /* C99 6.7.6 */ 1375 { 1376 begin_declaration_level(ABSTRACT); 1377 } abstract_declaration { 1378 end_declaration_level(); 1379 $$ = $2->s_type; 1380 } 1381 ; 1382 1383 abstract_declaration: /* specific to lint */ 1384 begin_type_qualifier_list end_type { 1385 $$ = declare_1_abstract(abstract_name()); 1386 } 1387 | begin_type_specifier_qualifier_list end_type { 1388 $$ = declare_1_abstract(abstract_name()); 1389 } 1390 | begin_type_qualifier_list end_type abstract_declarator { 1391 $$ = declare_1_abstract($3); 1392 } 1393 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1394 $$ = declare_1_abstract($3); 1395 } 1396 ; 1397 1398 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1399 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1400 abstract_declarator: 1401 pointer { 1402 $$ = add_pointer(abstract_name(), $1); 1403 } 1404 | direct_abstract_declarator 1405 | pointer direct_abstract_declarator { 1406 $$ = add_pointer($2, $1); 1407 } 1408 ; 1409 1410 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1411 direct_abstract_declarator: 1412 /* TODO: sort rules according to C99 */ 1413 T_LPAREN abstract_declarator T_RPAREN { 1414 $$ = $2; 1415 } 1416 | T_LBRACK array_size_opt T_RBRACK { 1417 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1418 } 1419 | type_attribute direct_abstract_declarator { 1420 $$ = $2; 1421 } 1422 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1423 $$ = add_array($1, $3.has_dim, $3.dim); 1424 } 1425 | abstract_decl_param_list asm_or_symbolrename_opt { 1426 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1427 end_declaration_level(); 1428 block_level--; 1429 } 1430 | direct_abstract_declarator abstract_decl_param_list 1431 asm_or_symbolrename_opt { 1432 $$ = add_function(symbolrename($1, $3), $2); 1433 end_declaration_level(); 1434 block_level--; 1435 } 1436 | direct_abstract_declarator type_attribute_list 1437 ; 1438 1439 abstract_decl_param_list: /* specific to lint */ 1440 abstract_decl_lparen T_RPAREN type_attribute_opt { 1441 $$ = NULL; 1442 } 1443 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1444 type_attribute_opt { 1445 dcs->d_proto = true; 1446 $$ = $2; 1447 } 1448 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1449 $$ = NULL; 1450 } 1451 ; 1452 1453 abstract_decl_lparen: /* specific to lint */ 1454 T_LPAREN { 1455 block_level++; 1456 begin_declaration_level(PROTO_ARG); 1457 } 1458 ; 1459 1460 vararg_parameter_type_list: /* specific to lint */ 1461 parameter_type_list 1462 | parameter_type_list T_COMMA T_ELLIPSIS { 1463 dcs->d_vararg = true; 1464 $$ = $1; 1465 } 1466 | T_ELLIPSIS { 1467 if (sflag) { 1468 /* ANSI C requires formal parameter before '...' */ 1469 error(84); 1470 } else if (!tflag) { 1471 /* ANSI C requires formal parameter before '...' */ 1472 warning(84); 1473 } 1474 dcs->d_vararg = true; 1475 $$ = NULL; 1476 } 1477 ; 1478 1479 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1480 parameter_type_list: 1481 parameter_declaration 1482 | parameter_type_list T_COMMA parameter_declaration { 1483 $$ = lnklst($1, $3); 1484 } 1485 ; 1486 1487 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1488 parameter_declaration: 1489 begin_type_declmods end_type { 1490 /* ^^ There is no check for the missing type-specifier. */ 1491 $$ = declare_argument(abstract_name(), false); 1492 } 1493 | begin_type_declaration_specifiers end_type { 1494 $$ = declare_argument(abstract_name(), false); 1495 } 1496 | begin_type_declmods end_type notype_param_declarator { 1497 /* ^^ There is no check for the missing type-specifier. */ 1498 $$ = declare_argument($3, false); 1499 } 1500 /* 1501 * type_param_declarator is needed because of following conflict: 1502 * "typedef int a; f(int (a));" could be parsed as 1503 * "function with argument a of type int", or 1504 * "function with an abstract argument of type function". 1505 * This grammar realizes the second case. 1506 */ 1507 | begin_type_declaration_specifiers end_type type_param_declarator { 1508 $$ = declare_argument($3, false); 1509 } 1510 | begin_type_declmods end_type abstract_declarator { 1511 /* ^^ There is no check for the missing type-specifier. */ 1512 $$ = declare_argument($3, false); 1513 } 1514 | begin_type_declaration_specifiers end_type abstract_declarator { 1515 $$ = declare_argument($3, false); 1516 } 1517 ; 1518 1519 initializer: /* C99 6.7.8 "Initialization" */ 1520 assignment_expression { 1521 init_expr($1); 1522 } 1523 | init_lbrace init_rbrace { 1524 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1525 } 1526 | init_lbrace initializer_list comma_opt init_rbrace 1527 /* XXX: What is this error handling for? */ 1528 | error 1529 ; 1530 1531 initializer_list: /* C99 6.7.8 "Initialization" */ 1532 initializer_list_item 1533 | initializer_list T_COMMA initializer_list_item 1534 ; 1535 1536 initializer_list_item: /* helper */ 1537 designation initializer 1538 | initializer 1539 ; 1540 1541 designation: /* C99 6.7.8 "Initialization" */ 1542 designator_list T_ASSIGN 1543 | identifier T_COLON { 1544 /* GCC style struct or union member name in initializer */ 1545 gnuism(315); 1546 add_designator_member($1); 1547 } 1548 ; 1549 1550 designator_list: /* C99 6.7.8 "Initialization" */ 1551 designator 1552 | designator_list designator 1553 ; 1554 1555 designator: /* C99 6.7.8 "Initialization" */ 1556 T_LBRACK range T_RBRACK { 1557 add_designator_subscript($2); 1558 if (!Sflag) 1559 /* array initializer with designators is a C9X ... */ 1560 warning(321); 1561 } 1562 | T_POINT identifier { 1563 if (!Sflag) 1564 /* struct or union member name in initializer is ... */ 1565 warning(313); 1566 add_designator_member($2); 1567 } 1568 ; 1569 1570 range: 1571 constant_expr { 1572 $$.lo = to_int_constant($1, true); 1573 $$.hi = $$.lo; 1574 } 1575 | constant_expr T_ELLIPSIS constant_expr { 1576 $$.lo = to_int_constant($1, true); 1577 $$.hi = to_int_constant($3, true); 1578 /* initialization with '[a...b]' is a GCC extension */ 1579 gnuism(340); 1580 } 1581 ; 1582 1583 init_lbrace: /* helper */ 1584 T_LBRACE { 1585 init_lbrace(); 1586 } 1587 ; 1588 1589 init_rbrace: /* helper */ 1590 T_RBRACE { 1591 init_rbrace(); 1592 } 1593 ; 1594 1595 asm_or_symbolrename_opt: /* GCC extensions */ 1596 /* empty */ { 1597 $$ = NULL; 1598 } 1599 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1600 freeyyv(&$3, T_STRING); 1601 $$ = NULL; 1602 } 1603 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1604 $$ = $3; 1605 } 1606 ; 1607 1608 statement: /* C99 6.8 */ 1609 expression_statement 1610 | non_expr_statement 1611 ; 1612 1613 non_expr_statement: /* helper for C99 6.8 */ 1614 type_attribute T_SEMI 1615 | labeled_statement 1616 | compound_statement 1617 | selection_statement 1618 | iteration_statement 1619 | jump_statement { 1620 seen_fallthrough = false; 1621 } 1622 | asm_statement 1623 ; 1624 1625 labeled_statement: /* C99 6.8.1 */ 1626 label type_attribute_opt statement 1627 ; 1628 1629 label: 1630 T_NAME T_COLON { 1631 symtyp = FLABEL; 1632 named_label(getsym($1)); 1633 } 1634 | T_CASE constant_expr T_COLON { 1635 case_label($2); 1636 seen_fallthrough = true; 1637 } 1638 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1639 /* XXX: We don't fill all cases */ 1640 case_label($2); 1641 seen_fallthrough = true; 1642 } 1643 | T_DEFAULT T_COLON { 1644 default_label(); 1645 seen_fallthrough = true; 1646 } 1647 ; 1648 1649 compound_statement: /* C99 6.8.2 */ 1650 compound_statement_lbrace compound_statement_rbrace 1651 | compound_statement_lbrace block_item_list compound_statement_rbrace 1652 ; 1653 1654 compound_statement_lbrace: 1655 T_LBRACE { 1656 block_level++; 1657 mem_block_level++; 1658 begin_declaration_level(AUTO); 1659 } 1660 ; 1661 1662 compound_statement_rbrace: 1663 T_RBRACE { 1664 end_declaration_level(); 1665 freeblk(); 1666 mem_block_level--; 1667 block_level--; 1668 seen_fallthrough = false; 1669 } 1670 ; 1671 1672 block_item_list: /* C99 6.8.2 */ 1673 block_item 1674 | block_item_list block_item { 1675 if (!Sflag && $1 && !$2) 1676 /* declarations after statements is a C99 feature */ 1677 c99ism(327); 1678 $$ = $1 || $2; 1679 } 1680 ; 1681 1682 block_item: /* C99 6.8.2 */ 1683 declaration_or_error { 1684 $$ = false; 1685 restore_warning_flags(); 1686 } 1687 | statement { 1688 $$ = true; 1689 restore_warning_flags(); 1690 } 1691 ; 1692 1693 expression_statement: /* C99 6.8.3 */ 1694 expression T_SEMI { 1695 expr($1, false, false, false, false); 1696 seen_fallthrough = false; 1697 } 1698 | T_SEMI { 1699 seen_fallthrough = false; 1700 } 1701 ; 1702 1703 selection_statement: /* C99 6.8.4 */ 1704 if_without_else %prec T_THEN { 1705 save_warning_flags(); 1706 if2(); 1707 if3(false); 1708 } 1709 | if_without_else T_ELSE { 1710 save_warning_flags(); 1711 if2(); 1712 } statement { 1713 clear_warning_flags(); 1714 if3(true); 1715 } 1716 | if_without_else T_ELSE error { 1717 clear_warning_flags(); 1718 if3(false); 1719 } 1720 | switch_expr statement { 1721 clear_warning_flags(); 1722 switch2(); 1723 } 1724 | switch_expr error { 1725 clear_warning_flags(); 1726 switch2(); 1727 } 1728 ; 1729 1730 if_without_else: /* see C99 6.8.4 */ 1731 if_expr statement 1732 | if_expr error 1733 ; 1734 1735 if_expr: /* see C99 6.8.4 */ 1736 T_IF T_LPAREN expression T_RPAREN { 1737 if1($3); 1738 clear_warning_flags(); 1739 } 1740 ; 1741 1742 switch_expr: /* see C99 6.8.4 */ 1743 T_SWITCH T_LPAREN expression T_RPAREN { 1744 switch1($3); 1745 clear_warning_flags(); 1746 } 1747 ; 1748 1749 iteration_statement: /* C99 6.8.5 */ 1750 while_expr statement { 1751 clear_warning_flags(); 1752 while2(); 1753 } 1754 | while_expr error { 1755 clear_warning_flags(); 1756 while2(); 1757 } 1758 | do_statement do_while_expr { 1759 do2($2); 1760 seen_fallthrough = false; 1761 } 1762 | do error { 1763 clear_warning_flags(); 1764 do2(NULL); 1765 } 1766 | for_exprs statement { 1767 clear_warning_flags(); 1768 for2(); 1769 end_declaration_level(); 1770 block_level--; 1771 } 1772 | for_exprs error { 1773 clear_warning_flags(); 1774 for2(); 1775 end_declaration_level(); 1776 block_level--; 1777 } 1778 ; 1779 1780 while_expr: /* see C99 6.8.5 */ 1781 T_WHILE T_LPAREN expression T_RPAREN { 1782 while1($3); 1783 clear_warning_flags(); 1784 } 1785 ; 1786 1787 do_statement: /* see C99 6.8.5 */ 1788 do statement { 1789 clear_warning_flags(); 1790 } 1791 ; 1792 1793 do: /* see C99 6.8.5 */ 1794 T_DO { 1795 do1(); 1796 } 1797 ; 1798 1799 do_while_expr: /* see C99 6.8.5 */ 1800 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1801 $$ = $3; 1802 } 1803 ; 1804 1805 for_start: /* see C99 6.8.5 */ 1806 T_FOR T_LPAREN { 1807 begin_declaration_level(AUTO); 1808 block_level++; 1809 } 1810 ; 1811 1812 for_exprs: /* see C99 6.8.5 */ 1813 for_start 1814 begin_type_declaration_specifiers end_type 1815 notype_init_declarators T_SEMI 1816 expression_opt T_SEMI expression_opt T_RPAREN { 1817 /* variable declaration in for loop */ 1818 c99ism(325); 1819 for1(NULL, $6, $8); 1820 clear_warning_flags(); 1821 } 1822 | for_start 1823 expression_opt T_SEMI 1824 expression_opt T_SEMI 1825 expression_opt T_RPAREN { 1826 for1($2, $4, $6); 1827 clear_warning_flags(); 1828 } 1829 ; 1830 1831 jump_statement: /* C99 6.8.6 */ 1832 goto identifier T_SEMI { 1833 do_goto(getsym($2)); 1834 } 1835 | goto error T_SEMI { 1836 symtyp = FVFT; 1837 } 1838 | T_CONTINUE T_SEMI { 1839 do_continue(); 1840 } 1841 | T_BREAK T_SEMI { 1842 do_break(); 1843 } 1844 | T_RETURN T_SEMI { 1845 do_return(NULL); 1846 } 1847 | T_RETURN expression T_SEMI { 1848 do_return($2); 1849 } 1850 ; 1851 1852 goto: /* see C99 6.8.6 */ 1853 T_GOTO { 1854 symtyp = FLABEL; 1855 } 1856 ; 1857 1858 asm_statement: /* GCC extension */ 1859 T_ASM T_LPAREN read_until_rparen T_SEMI { 1860 setasm(); 1861 } 1862 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1863 setasm(); 1864 } 1865 | T_ASM error 1866 ; 1867 1868 read_until_rparen: /* helper for 'asm_statement' */ 1869 /* empty */ { 1870 read_until_rparen(); 1871 } 1872 ; 1873 1874 translation_unit: /* C99 6.9 */ 1875 external_declaration 1876 | translation_unit external_declaration 1877 ; 1878 1879 external_declaration: /* C99 6.9 */ 1880 function_definition { 1881 global_clean_up_decl(false); 1882 clear_warning_flags(); 1883 } 1884 | top_level_declaration { 1885 global_clean_up_decl(false); 1886 clear_warning_flags(); 1887 } 1888 | asm_statement /* GCC extension */ 1889 | T_SEMI { /* GCC extension */ 1890 if (sflag) { 1891 /* empty declaration */ 1892 error(0); 1893 } else if (!tflag) { 1894 /* empty declaration */ 1895 warning(0); 1896 } 1897 } 1898 ; 1899 1900 /* 1901 * On the top level, lint allows several forms of declarations that it doesn't 1902 * allow in functions. For example, a single ';' is an empty declaration and 1903 * is supported by some compilers, but in a function it would be an empty 1904 * statement, not a declaration. This makes a difference in C90 mode, where 1905 * a statement must not be followed by a declaration. 1906 * 1907 * See 'declaration' for all other declarations. 1908 */ 1909 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1910 begin_type end_type notype_init_declarators T_SEMI { 1911 if (sflag) { 1912 /* old style declaration; add 'int' */ 1913 error(1); 1914 } else if (!tflag) { 1915 /* old style declaration; add 'int' */ 1916 warning(1); 1917 } 1918 } 1919 | declaration 1920 | error T_SEMI { 1921 global_clean_up(); 1922 } 1923 | error T_RBRACE { 1924 global_clean_up(); 1925 } 1926 ; 1927 1928 function_definition: /* C99 6.9.1 */ 1929 func_declarator { 1930 if ($1->s_type->t_tspec != FUNC) { 1931 /* syntax error '%s' */ 1932 error(249, yytext); 1933 YYERROR; 1934 } 1935 if ($1->s_type->t_typedef) { 1936 /* ()-less function definition */ 1937 error(64); 1938 YYERROR; 1939 } 1940 funcdef($1); 1941 block_level++; 1942 begin_declaration_level(ARG); 1943 if (lwarn == LWARN_NONE) 1944 $1->s_used = true; 1945 } arg_declaration_list_opt { 1946 end_declaration_level(); 1947 block_level--; 1948 check_func_lint_directives(); 1949 check_func_old_style_arguments(); 1950 begin_control_statement(CS_FUNCTION_BODY); 1951 } compound_statement { 1952 funcend(); 1953 end_control_statement(CS_FUNCTION_BODY); 1954 } 1955 ; 1956 1957 func_declarator: 1958 begin_type end_type notype_declarator { 1959 /* ^^ There is no check for the missing type-specifier. */ 1960 $$ = $3; 1961 } 1962 | begin_type_declmods end_type notype_declarator { 1963 /* ^^ There is no check for the missing type-specifier. */ 1964 $$ = $3; 1965 } 1966 | begin_type_declaration_specifiers end_type type_declarator { 1967 $$ = $3; 1968 } 1969 ; 1970 1971 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1972 /* empty */ 1973 | arg_declaration_list 1974 ; 1975 1976 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 1977 arg_declaration 1978 | arg_declaration_list arg_declaration 1979 /* XXX or better "arg_declaration error" ? */ 1980 | error 1981 ; 1982 1983 /* 1984 * "arg_declaration" is separated from "declaration" because it 1985 * needs other error handling. 1986 */ 1987 arg_declaration: 1988 begin_type_declmods end_type T_SEMI { 1989 /* empty declaration */ 1990 warning(2); 1991 } 1992 | begin_type_declmods end_type notype_init_declarators T_SEMI 1993 | begin_type_declaration_specifiers end_type T_SEMI { 1994 if (!dcs->d_nonempty_decl) { 1995 /* empty declaration */ 1996 warning(2); 1997 } else { 1998 /* '%s' declared in argument declaration list */ 1999 warning(3, type_name(dcs->d_type)); 2000 } 2001 } 2002 | begin_type_declaration_specifiers end_type 2003 type_init_declarators T_SEMI { 2004 if (dcs->d_nonempty_decl) { 2005 /* '%s' declared in argument declaration list */ 2006 warning(3, type_name(dcs->d_type)); 2007 } 2008 } 2009 | begin_type_declmods error 2010 | begin_type_declaration_specifiers error 2011 ; 2012 2013 gcc_attribute_list_opt: 2014 /* empty */ 2015 | gcc_attribute_list 2016 ; 2017 2018 gcc_attribute_list: 2019 gcc_attribute 2020 | gcc_attribute_list gcc_attribute 2021 ; 2022 2023 gcc_attribute: 2024 T_ATTRIBUTE T_LPAREN T_LPAREN { 2025 attron = true; 2026 } gcc_attribute_spec_list { 2027 attron = false; 2028 } T_RPAREN T_RPAREN 2029 ; 2030 2031 gcc_attribute_spec_list: 2032 gcc_attribute_spec 2033 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2034 ; 2035 2036 gcc_attribute_spec: 2037 /* empty */ 2038 | T_AT_ALWAYS_INLINE 2039 | T_AT_ALIAS T_LPAREN string T_RPAREN 2040 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2041 | T_AT_ALIGNED 2042 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2043 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2044 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2045 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2046 | T_AT_COLD 2047 | T_AT_COMMON 2048 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2049 | T_AT_CONSTRUCTOR 2050 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2051 | T_AT_DEPRECATED 2052 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2053 | T_AT_DESTRUCTOR 2054 | T_AT_FALLTHROUGH { 2055 fallthru(1); 2056 } 2057 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2058 constant_expr T_COMMA constant_expr T_RPAREN 2059 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2060 | T_AT_GNU_INLINE 2061 | T_AT_HOT 2062 | T_AT_MALLOC 2063 | T_AT_MAY_ALIAS 2064 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2065 | T_AT_NOINLINE 2066 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2067 | T_AT_NONNULL 2068 | T_AT_NONSTRING 2069 | T_AT_NORETURN 2070 | T_AT_NOTHROW 2071 | T_AT_NO_INSTRUMENT_FUNCTION 2072 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2073 | T_AT_PACKED { 2074 addpacked(); 2075 } 2076 | T_AT_PCS T_LPAREN string T_RPAREN 2077 | T_AT_PURE 2078 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2079 | T_AT_RETURNS_NONNULL 2080 | T_AT_RETURNS_TWICE 2081 | T_AT_SECTION T_LPAREN string T_RPAREN 2082 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2083 | T_AT_SENTINEL 2084 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2085 | T_AT_TUNION 2086 | T_AT_UNUSED { 2087 add_attr_used(); 2088 } 2089 | T_AT_USED { 2090 add_attr_used(); 2091 } 2092 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2093 | T_AT_WARN_UNUSED_RESULT 2094 | T_AT_WEAK 2095 | T_QUAL { 2096 if ($1 != CONST) 2097 yyerror("Bad attribute"); 2098 } 2099 ; 2100 2101 gcc_attribute_bounded: 2102 T_AT_MINBYTES 2103 | T_AT_STRING 2104 | T_AT_BUFFER 2105 ; 2106 2107 gcc_attribute_format: 2108 T_AT_FORMAT_GNU_PRINTF 2109 | T_AT_FORMAT_PRINTF 2110 | T_AT_FORMAT_SCANF 2111 | T_AT_FORMAT_STRFMON 2112 | T_AT_FORMAT_STRFTIME 2113 | T_AT_FORMAT_SYSLOG 2114 ; 2115 2116 %% 2117 2118 /* ARGSUSED */ 2119 int 2120 yyerror(const char *msg) 2121 { 2122 /* syntax error '%s' */ 2123 error(249, yytext); 2124 if (++sytxerr >= 5) 2125 norecover(); 2126 return 0; 2127 } 2128 2129 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2130 || (defined(YYDEBUG) && defined(YYBISON)) 2131 static const char * 2132 cgram_to_string(int token, YYSTYPE val) 2133 { 2134 static const char *tqual_name[] = { 2135 "const", "volatile", "restrict", "_Thread_local" 2136 }; 2137 2138 switch (token) { 2139 case T_INCDEC: 2140 case T_MULTIPLICATIVE: 2141 case T_ADDITIVE: 2142 case T_SHIFT: 2143 case T_RELATIONAL: 2144 case T_EQUALITY: 2145 case T_OPASSIGN: 2146 return modtab[val.y_op].m_name; 2147 case T_SCLASS: 2148 return scl_name(val.y_scl); 2149 case T_TYPE: 2150 case T_STRUCT_OR_UNION: 2151 return tspec_name(val.y_tspec); 2152 case T_QUAL: 2153 return tqual_name[val.y_tqual]; 2154 case T_NAME: 2155 return val.y_name->sb_name; 2156 default: 2157 return "<none>"; 2158 } 2159 } 2160 #endif 2161 2162 #if defined(YYDEBUG) && defined(YYBISON) 2163 static void 2164 cgram_print(FILE *output, int token, YYSTYPE val) 2165 { 2166 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2167 } 2168 #endif 2169 2170 static void 2171 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2172 { 2173 declare(decl, initflg, renaming); 2174 if (renaming != NULL) 2175 freeyyv(&renaming, T_NAME); 2176 } 2177 2178 /* 2179 * Discard all input tokens up to and including the next 2180 * unmatched right paren 2181 */ 2182 static void 2183 read_until_rparen(void) 2184 { 2185 int level; 2186 2187 if (yychar < 0) 2188 yychar = yylex(); 2189 freeyyv(&yylval, yychar); 2190 2191 level = 1; 2192 while (yychar != T_RPAREN || --level > 0) { 2193 if (yychar == T_LPAREN) { 2194 level++; 2195 } else if (yychar <= 0) { 2196 break; 2197 } 2198 freeyyv(&yylval, yychar = yylex()); 2199 } 2200 2201 yyclearin; 2202 } 2203 2204 static sym_t * 2205 symbolrename(sym_t *s, sbuf_t *sb) 2206 { 2207 if (sb != NULL) 2208 s->s_rename = sb->sb_name; 2209 return s; 2210 } 2211
Indexes created Thu Oct 02 14:10:14 GMT 2025