cgram.y revision 1.373
1 %{ 2 /* $NetBSD: cgram.y,v 1.373 2021/12/14 20:13:13 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved. 6 * Copyright (c) 1994, 1995 Jochen Pohl 7 * All Rights Reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Jochen Pohl for 20 * The NetBSD Project. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(__RCSID) && !defined(lint) 38 __RCSID("$NetBSD: cgram.y,v 1.373 2021/12/14 20:13:13 christos Exp $"); 39 #endif 40 41 #include <limits.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "lint1.h" 46 47 extern char *yytext; 48 49 /* 50 * Contains the level of current declaration, used for symbol table entries. 51 * 0 is the top-level, > 0 is inside a function body. 52 */ 53 int block_level; 54 55 /* 56 * level for memory allocation. Normally the same as block_level. 57 * An exception is the declaration of arguments in prototypes. Memory 58 * for these can't be freed after the declaration, but symbols must 59 * be removed from the symbol table after the declaration. 60 */ 61 int mem_block_level; 62 63 /* 64 * Save the no-warns state and restore it to avoid the problem where 65 * if (expr) { stmt } / * NOLINT * / stmt; 66 */ 67 static int olwarn = LWARN_BAD; 68 69 static void cgram_declare(sym_t *, bool, sbuf_t *); 70 static void read_until_rparen(void); 71 static sym_t *symbolrename(sym_t *, sbuf_t *); 72 73 74 #ifdef DEBUG 75 static void 76 CLEAR_WARN_FLAGS(const char *file, size_t line) 77 { 78 debug_step("%s:%zu: clearing flags", file, line); 79 clear_warn_flags(); 80 olwarn = LWARN_BAD; 81 } 82 83 static void 84 SAVE_WARN_FLAGS(const char *file, size_t line) 85 { 86 lint_assert(olwarn == LWARN_BAD); 87 debug_step("%s:%zu: saving flags %d", file, line, lwarn); 88 olwarn = lwarn; 89 } 90 91 static void 92 RESTORE_WARN_FLAGS(const char *file, size_t line) 93 { 94 if (olwarn != LWARN_BAD) { 95 lwarn = olwarn; 96 debug_step("%s:%zu: restoring flags %d", file, line, lwarn); 97 olwarn = LWARN_BAD; 98 } else 99 CLEAR_WARN_FLAGS(file, line); 100 } 101 #else 102 #define CLEAR_WARN_FLAGS(f, l) clear_warn_flags(), olwarn = LWARN_BAD 103 #define SAVE_WARN_FLAGS(f, l) olwarn = lwarn 104 #define RESTORE_WARN_FLAGS(f, l) \ 105 (void)(olwarn == LWARN_BAD ? (clear_warn_flags(), 0) : (lwarn = olwarn)) 106 #endif 107 108 #define clear_warning_flags() CLEAR_WARN_FLAGS(__FILE__, __LINE__) 109 #define save_warning_flags() SAVE_WARN_FLAGS(__FILE__, __LINE__) 110 #define restore_warning_flags() RESTORE_WARN_FLAGS(__FILE__, __LINE__) 111 112 /* unbind the anonymous struct members from the struct */ 113 static void 114 anonymize(sym_t *s) 115 { 116 for ( ; s != NULL; s = s->s_next) 117 s->s_styp = NULL; 118 } 119 120 #if defined(YYDEBUG) && (defined(YYBYACC) || defined(YYBISON)) 121 #define YYSTYPE_TOSTRING cgram_to_string 122 #endif 123 #if defined(YYDEBUG) && defined(YYBISON) 124 #define YYPRINT cgram_print 125 #endif 126 127 %} 128 129 %expect 150 130 131 %union { 132 val_t *y_val; 133 sbuf_t *y_name; 134 sym_t *y_sym; 135 op_t y_op; 136 scl_t y_scl; 137 tspec_t y_tspec; 138 tqual_t y_tqual; 139 type_t *y_type; 140 tnode_t *y_tnode; 141 range_t y_range; 142 strg_t *y_string; 143 qual_ptr *y_qual_ptr; 144 bool y_seen_statement; 145 struct generic_association *y_generic; 146 struct array_size y_array_size; 147 bool y_in_system_header; 148 }; 149 150 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 151 %token T_POINT T_ARROW 152 %token T_COMPLEMENT T_LOGNOT 153 %token <y_op> T_INCDEC 154 %token T_SIZEOF 155 %token T_BUILTIN_OFFSETOF 156 %token T_TYPEOF 157 %token T_EXTENSION 158 %token T_ALIGNAS 159 %token T_ALIGNOF 160 %token T_ASTERISK 161 %token <y_op> T_MULTIPLICATIVE 162 %token <y_op> T_ADDITIVE 163 %token <y_op> T_SHIFT 164 %token <y_op> T_RELATIONAL 165 %token <y_op> T_EQUALITY 166 %token T_AMPER 167 %token T_BITXOR 168 %token T_BITOR 169 %token T_LOGAND 170 %token T_LOGOR 171 %token T_QUEST 172 %token T_COLON 173 %token T_ASSIGN 174 %token <y_op> T_OPASSIGN 175 %token T_COMMA 176 %token T_SEMI 177 %token T_ELLIPSIS 178 %token T_REAL 179 %token T_IMAG 180 %token T_GENERIC 181 %token T_NORETURN 182 183 /* storage classes (extern, static, auto, register and typedef) */ 184 %token <y_scl> T_SCLASS 185 186 /* 187 * predefined type keywords (char, int, short, long, unsigned, signed, 188 * float, double, void); see T_TYPENAME for types from typedef 189 */ 190 %token <y_tspec> T_TYPE 191 192 /* qualifiers (const, volatile, restrict, _Thread_local) */ 193 %token <y_tqual> T_QUAL 194 195 /* struct or union */ 196 %token <y_tspec> T_STRUCT_OR_UNION 197 198 /* remaining keywords */ 199 %token T_ASM 200 %token T_BREAK 201 %token T_CASE 202 %token T_CONTINUE 203 %token T_DEFAULT 204 %token T_DO 205 %token T_ELSE 206 %token T_ENUM 207 %token T_FOR 208 %token T_GOTO 209 %token T_IF 210 %token T_PACKED 211 %token T_RETURN 212 %token T_SWITCH 213 %token T_SYMBOLRENAME 214 %token T_WHILE 215 %token T_STATIC_ASSERT 216 217 %token T_ATTRIBUTE 218 %token T_AT_ALIAS 219 %token T_AT_ALIGNED 220 %token T_AT_ALLOC_SIZE 221 %token T_AT_ALWAYS_INLINE 222 %token T_AT_BOUNDED 223 %token T_AT_BUFFER 224 %token T_AT_COLD 225 %token T_AT_COMMON 226 %token T_AT_CONSTRUCTOR 227 %token T_AT_DEPRECATED 228 %token T_AT_DESTRUCTOR 229 %token T_AT_FALLTHROUGH 230 %token T_AT_FORMAT 231 %token T_AT_FORMAT_ARG 232 %token T_AT_FORMAT_GNU_PRINTF 233 %token T_AT_FORMAT_PRINTF 234 %token T_AT_FORMAT_SCANF 235 %token T_AT_FORMAT_STRFMON 236 %token T_AT_FORMAT_STRFTIME 237 %token T_AT_FORMAT_SYSLOG 238 %token T_AT_GNU_INLINE 239 %token T_AT_HOT 240 %token T_AT_MALLOC 241 %token T_AT_MAY_ALIAS 242 %token T_AT_MINBYTES 243 %token T_AT_MODE 244 %token T_AT_NOINLINE 245 %token T_AT_NONNULL 246 %token T_AT_NONSTRING 247 %token T_AT_NORETURN 248 %token T_AT_NOTHROW 249 %token T_AT_NO_INSTRUMENT_FUNCTION 250 %token T_AT_OPTIMIZE 251 %token T_AT_PACKED 252 %token T_AT_PCS 253 %token T_AT_PURE 254 %token T_AT_REGPARM 255 %token T_AT_RETURNS_NONNULL 256 %token T_AT_RETURNS_TWICE 257 %token T_AT_SECTION 258 %token T_AT_SENTINEL 259 %token T_AT_STRING 260 %token T_AT_TARGET 261 %token T_AT_TLS_MODEL 262 %token T_AT_TUNION 263 %token T_AT_UNUSED 264 %token T_AT_USED 265 %token T_AT_VISIBILITY 266 %token T_AT_WARN_UNUSED_RESULT 267 %token T_AT_WEAK 268 269 %left T_THEN 270 %left T_ELSE 271 %right T_QUEST T_COLON 272 %left T_LOGOR 273 %left T_LOGAND 274 %left T_BITOR 275 %left T_BITXOR 276 %left T_AMPER 277 %left T_EQUALITY 278 %left T_RELATIONAL 279 %left T_SHIFT 280 %left T_ADDITIVE 281 %left T_ASTERISK T_MULTIPLICATIVE 282 283 %token <y_name> T_NAME 284 %token <y_name> T_TYPENAME 285 %token <y_val> T_CON 286 %token <y_string> T_STRING 287 288 %type <y_sym> identifier_sym 289 %type <y_name> identifier 290 %type <y_string> string 291 %type <y_string> string2 292 293 %type <y_tnode> primary_expression 294 %type <y_tnode> generic_selection 295 %type <y_generic> generic_assoc_list 296 %type <y_generic> generic_association 297 %type <y_tnode> postfix_expression 298 %type <y_tnode> gcc_statement_expr_list 299 %type <y_tnode> gcc_statement_expr_item 300 %type <y_op> point_or_arrow 301 %type <y_tnode> argument_expression_list 302 %type <y_tnode> unary_expression 303 %type <y_tnode> cast_expression 304 %type <y_tnode> conditional_expression 305 %type <y_tnode> assignment_expression 306 %type <y_tnode> expression_opt 307 %type <y_tnode> expression 308 %type <y_tnode> constant_expr 309 310 %type <y_type> begin_type_typespec 311 %type <y_type> type_specifier 312 %type <y_type> notype_type_specifier 313 %type <y_type> struct_or_union_specifier 314 %type <y_tspec> struct_or_union 315 %type <y_sym> braced_struct_declaration_list 316 %type <y_sym> struct_declaration_list_with_rbrace 317 %type <y_sym> struct_declaration_list 318 %type <y_sym> struct_declaration 319 %type <y_sym> notype_struct_declarators 320 %type <y_sym> type_struct_declarators 321 %type <y_sym> notype_struct_declarator 322 %type <y_sym> type_struct_declarator 323 %type <y_type> enum_specifier 324 %type <y_sym> enum_declaration 325 %type <y_sym> enums_with_opt_comma 326 %type <y_sym> enumerator_list 327 %type <y_sym> enumerator 328 %type <y_qual_ptr> type_qualifier 329 %type <y_qual_ptr> pointer 330 %type <y_qual_ptr> asterisk 331 %type <y_qual_ptr> type_qualifier_list_opt 332 %type <y_qual_ptr> type_qualifier_list 333 %type <y_sym> notype_declarator 334 %type <y_sym> type_declarator 335 %type <y_sym> notype_direct_declarator 336 %type <y_sym> type_direct_declarator 337 %type <y_sym> type_param_declarator 338 %type <y_sym> notype_param_declarator 339 %type <y_sym> direct_param_declarator 340 %type <y_sym> direct_notype_param_declarator 341 %type <y_sym> param_list 342 %type <y_array_size> array_size_opt 343 %type <y_tnode> array_size 344 %type <y_sym> identifier_list 345 %type <y_type> type_name 346 %type <y_sym> abstract_declaration 347 %type <y_sym> abstract_declarator 348 %type <y_sym> direct_abstract_declarator 349 %type <y_sym> abstract_decl_param_list 350 %type <y_sym> vararg_parameter_type_list 351 %type <y_sym> parameter_type_list 352 %type <y_sym> parameter_declaration 353 %type <y_range> range 354 %type <y_name> asm_or_symbolrename_opt 355 356 %type <y_seen_statement> block_item_list 357 %type <y_seen_statement> block_item 358 %type <y_tnode> do_while_expr 359 %type <y_sym> func_declarator 360 %type <y_in_system_header> sys 361 362 %{ 363 #if defined(YYDEBUG) && defined(YYBISON) 364 static inline void cgram_print(FILE *, int, YYSTYPE); 365 #endif 366 %} 367 368 %% 369 370 program: 371 /* empty */ { 372 if (sflag) { 373 /* empty translation unit */ 374 error(272); 375 } else if (!tflag) { 376 /* empty translation unit */ 377 warning(272); 378 } 379 } 380 | translation_unit 381 ; 382 383 identifier_sym: /* helper for struct/union/enum */ 384 identifier { 385 $$ = getsym($1); 386 } 387 ; 388 389 /* K&R ???, C90 ???, C99 6.4.2.1, C11 ??? */ 390 identifier: 391 T_NAME { 392 debug_step("cgram: name '%s'", $1->sb_name); 393 $$ = $1; 394 } 395 | T_TYPENAME { 396 debug_step("cgram: typename '%s'", $1->sb_name); 397 $$ = $1; 398 } 399 ; 400 401 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 402 string: 403 T_STRING 404 | T_STRING string2 { 405 $$ = cat_strings($1, $2); 406 } 407 ; 408 409 /* see C99 6.4.5, string literals are joined by 5.1.1.2 */ 410 string2: 411 T_STRING { 412 if (tflag) { 413 /* concatenated strings are illegal in traditional C */ 414 warning(219); 415 } 416 $$ = $1; 417 } 418 | string2 T_STRING { 419 $$ = cat_strings($1, $2); 420 } 421 ; 422 423 /* K&R 7.1, C90 ???, C99 6.5.1, C11 6.5.1 */ 424 primary_expression: 425 T_NAME { 426 bool sys_name, sys_next; 427 sys_name = in_system_header; 428 if (yychar < 0) 429 yychar = yylex(); 430 sys_next = in_system_header; 431 in_system_header = sys_name; 432 $$ = build_name(getsym($1), yychar); 433 in_system_header = sys_next; 434 } 435 | T_CON { 436 $$ = build_constant(gettyp($1->v_tspec), $1); 437 } 438 | string { 439 $$ = build_string($1); 440 } 441 | T_LPAREN expression T_RPAREN { 442 if ($2 != NULL) 443 $2->tn_parenthesized = true; 444 $$ = $2; 445 } 446 | generic_selection 447 /* GCC primary-expression, see c_parser_postfix_expression */ 448 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN { 449 symtyp = FMEMBER; 450 $$ = build_offsetof($3, getsym($5)); 451 } 452 ; 453 454 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 455 generic_selection: 456 T_GENERIC T_LPAREN assignment_expression T_COMMA 457 generic_assoc_list T_RPAREN { 458 /* generic selection requires C11 or later */ 459 c11ism(345); 460 $$ = build_generic_selection($3, $5); 461 } 462 ; 463 464 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 465 generic_assoc_list: 466 generic_association 467 | generic_assoc_list T_COMMA generic_association { 468 $3->ga_prev = $1; 469 $$ = $3; 470 } 471 ; 472 473 /* K&R ---, C90 ---, C99 ---, C11 6.5.1.1 */ 474 generic_association: 475 type_name T_COLON assignment_expression { 476 $$ = getblk(sizeof(*$$)); 477 $$->ga_arg = $1; 478 $$->ga_result = $3; 479 } 480 | T_DEFAULT T_COLON assignment_expression { 481 $$ = getblk(sizeof(*$$)); 482 $$->ga_arg = NULL; 483 $$->ga_result = $3; 484 } 485 ; 486 487 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 488 postfix_expression: 489 primary_expression 490 | postfix_expression T_LBRACK sys expression T_RBRACK { 491 $$ = build_unary(INDIR, $3, build_binary($1, PLUS, $3, $4)); 492 } 493 | postfix_expression T_LPAREN sys T_RPAREN { 494 $$ = build_function_call($1, $3, NULL); 495 } 496 | postfix_expression T_LPAREN sys argument_expression_list T_RPAREN { 497 $$ = build_function_call($1, $3, $4); 498 } 499 | postfix_expression point_or_arrow sys T_NAME { 500 $$ = build_member_access($1, $2, $3, $4); 501 } 502 | postfix_expression T_INCDEC sys { 503 $$ = build_unary($2 == INC ? INCAFT : DECAFT, $3, $1); 504 } 505 | T_LPAREN type_name T_RPAREN { /* C99 6.5.2.5 "Compound literals" */ 506 sym_t *tmp = mktempsym($2); 507 begin_initialization(tmp); 508 cgram_declare(tmp, true, NULL); 509 } init_lbrace initializer_list comma_opt init_rbrace { 510 if (!Sflag) 511 /* compound literals are a C9X/GCC extension */ 512 gnuism(319); 513 $$ = build_name(*current_initsym(), 0); 514 end_initialization(); 515 } 516 | T_LPAREN compound_statement_lbrace gcc_statement_expr_list { 517 block_level--; 518 mem_block_level--; 519 begin_initialization(mktempsym(dup_type($3->tn_type))); 520 mem_block_level++; 521 block_level++; 522 /* ({ }) is a GCC extension */ 523 gnuism(320); 524 } compound_statement_rbrace T_RPAREN { 525 $$ = build_name(*current_initsym(), 0); 526 end_initialization(); 527 } 528 ; 529 530 comma_opt: /* helper for 'postfix_expression' */ 531 /* empty */ 532 | T_COMMA 533 ; 534 535 /* 536 * The inner part of a GCC statement-expression of the form ({ ... }). 537 * 538 * https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html 539 */ 540 gcc_statement_expr_list: 541 gcc_statement_expr_item 542 | gcc_statement_expr_list gcc_statement_expr_item { 543 $$ = $2; 544 } 545 ; 546 547 gcc_statement_expr_item: 548 declaration_or_error { 549 clear_warning_flags(); 550 $$ = NULL; 551 } 552 | non_expr_statement { 553 $$ = expr_zalloc_tnode(); 554 $$->tn_type = gettyp(VOID); 555 } 556 | expression T_SEMI { 557 if ($1 == NULL) { /* in case of syntax errors */ 558 $$ = expr_zalloc_tnode(); 559 $$->tn_type = gettyp(VOID); 560 } else { 561 /* XXX: do that only on the last name */ 562 if ($1->tn_op == NAME) 563 $1->tn_sym->s_used = true; 564 expr($1, false, false, false, false); 565 seen_fallthrough = false; 566 $$ = $1; 567 } 568 } 569 ; 570 571 point_or_arrow: /* helper for 'postfix_expression' */ 572 T_POINT { 573 symtyp = FMEMBER; 574 $$ = POINT; 575 } 576 | T_ARROW { 577 symtyp = FMEMBER; 578 $$ = ARROW; 579 } 580 ; 581 582 /* K&R 7.1, C90 ???, C99 6.5.2, C11 6.5.2 */ 583 argument_expression_list: 584 assignment_expression { 585 $$ = build_function_argument(NULL, $1); 586 } 587 | argument_expression_list T_COMMA assignment_expression { 588 $$ = build_function_argument($1, $3); 589 } 590 ; 591 592 /* K&R 7.2, C90 ???, C99 6.5.3, C11 6.5.3 */ 593 unary_expression: 594 postfix_expression 595 | T_INCDEC sys unary_expression { 596 $$ = build_unary($1 == INC ? INCBEF : DECBEF, $2, $3); 597 } 598 | T_AMPER sys cast_expression { 599 $$ = build_unary(ADDR, $2, $3); 600 } 601 | T_ASTERISK sys cast_expression { 602 $$ = build_unary(INDIR, $2, $3); 603 } 604 | T_ADDITIVE sys cast_expression { 605 if (tflag && $1 == PLUS) { 606 /* unary + is illegal in traditional C */ 607 warning(100); 608 } 609 $$ = build_unary($1 == PLUS ? UPLUS : UMINUS, $2, $3); 610 } 611 | T_COMPLEMENT sys cast_expression { 612 $$ = build_unary(COMPL, $2, $3); 613 } 614 | T_LOGNOT sys cast_expression { 615 $$ = build_unary(NOT, $2, $3); 616 } 617 | T_REAL sys cast_expression { /* GCC c_parser_unary_expression */ 618 $$ = build_unary(REAL, $2, $3); 619 } 620 | T_IMAG sys cast_expression { /* GCC c_parser_unary_expression */ 621 $$ = build_unary(IMAG, $2, $3); 622 } 623 | T_EXTENSION cast_expression { /* GCC c_parser_unary_expression */ 624 $$ = $2; 625 } 626 | T_SIZEOF unary_expression { 627 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 628 if ($$ != NULL) 629 check_expr_misc($2, 630 false, false, false, false, false, true); 631 } 632 | T_SIZEOF T_LPAREN type_name T_RPAREN { 633 $$ = build_sizeof($3); 634 } 635 /* K&R ---, C90 ---, C99 ---, C11 6.5.3 */ 636 | T_ALIGNOF T_LPAREN type_name T_RPAREN { 637 /* TODO: c11ism */ 638 $$ = build_alignof($3); 639 } 640 ; 641 642 /* The rule 'unary_operator' is inlined into unary_expression. */ 643 644 /* K&R 7.2, C90 ???, C99 6.5.4, C11 6.5.4 */ 645 cast_expression: 646 unary_expression 647 | T_LPAREN type_name T_RPAREN cast_expression { 648 $$ = cast($4, $2); 649 } 650 ; 651 652 expression_opt: 653 /* empty */ { 654 $$ = NULL; 655 } 656 | expression 657 ; 658 659 /* 'conditional_expression' also implements 'multiplicative_expression'. */ 660 /* 'conditional_expression' also implements 'additive_expression'. */ 661 /* 'conditional_expression' also implements 'shift_expression'. */ 662 /* 'conditional_expression' also implements 'relational_expression'. */ 663 /* 'conditional_expression' also implements 'equality_expression'. */ 664 /* 'conditional_expression' also implements 'AND_expression'. */ 665 /* 'conditional_expression' also implements 'exclusive_OR_expression'. */ 666 /* 'conditional_expression' also implements 'inclusive_OR_expression'. */ 667 /* 'conditional_expression' also implements 'logical_AND_expression'. */ 668 /* 'conditional_expression' also implements 'logical_OR_expression'. */ 669 /* K&R ???, C90 ???, C99 6.5.5 to 6.5.15, C11 6.5.5 to 6.5.15 */ 670 conditional_expression: 671 cast_expression 672 | conditional_expression T_ASTERISK sys conditional_expression { 673 $$ = build_binary($1, MULT, $3, $4); 674 } 675 | conditional_expression T_MULTIPLICATIVE sys conditional_expression { 676 $$ = build_binary($1, $2, $3, $4); 677 } 678 | conditional_expression T_ADDITIVE sys conditional_expression { 679 $$ = build_binary($1, $2, $3, $4); 680 } 681 | conditional_expression T_SHIFT sys conditional_expression { 682 $$ = build_binary($1, $2, $3, $4); 683 } 684 | conditional_expression T_RELATIONAL sys conditional_expression { 685 $$ = build_binary($1, $2, $3, $4); 686 } 687 | conditional_expression T_EQUALITY sys conditional_expression { 688 $$ = build_binary($1, $2, $3, $4); 689 } 690 | conditional_expression T_AMPER sys conditional_expression { 691 $$ = build_binary($1, BITAND, $3, $4); 692 } 693 | conditional_expression T_BITXOR sys conditional_expression { 694 $$ = build_binary($1, BITXOR, $3, $4); 695 } 696 | conditional_expression T_BITOR sys conditional_expression { 697 $$ = build_binary($1, BITOR, $3, $4); 698 } 699 | conditional_expression T_LOGAND sys conditional_expression { 700 $$ = build_binary($1, LOGAND, $3, $4); 701 } 702 | conditional_expression T_LOGOR sys conditional_expression { 703 $$ = build_binary($1, LOGOR, $3, $4); 704 } 705 | conditional_expression T_QUEST sys 706 expression T_COLON sys conditional_expression { 707 $$ = build_binary($1, QUEST, $3, 708 build_binary($4, COLON, $6, $7)); 709 } 710 ; 711 712 /* K&R ???, C90 ???, C99 6.5.16, C11 6.5.16 */ 713 assignment_expression: 714 conditional_expression 715 | unary_expression T_ASSIGN sys assignment_expression { 716 $$ = build_binary($1, ASSIGN, $3, $4); 717 } 718 | unary_expression T_OPASSIGN sys assignment_expression { 719 $$ = build_binary($1, $2, $3, $4); 720 } 721 ; 722 723 /* K&R ???, C90 ???, C99 6.5.17, C11 6.5.17 */ 724 expression: 725 assignment_expression 726 | expression T_COMMA sys assignment_expression { 727 $$ = build_binary($1, COMMA, $3, $4); 728 } 729 ; 730 731 constant_expr_list_opt: /* helper for gcc_attribute */ 732 /* empty */ 733 | constant_expr_list 734 ; 735 736 constant_expr_list: /* helper for gcc_attribute */ 737 constant_expr 738 | constant_expr_list T_COMMA constant_expr 739 ; 740 741 constant_expr: /* C99 6.6 */ 742 conditional_expression 743 ; 744 745 declaration_or_error: 746 declaration 747 | error T_SEMI 748 ; 749 750 declaration: /* C99 6.7 */ 751 begin_type_declmods end_type T_SEMI { 752 if (dcs->d_scl == TYPEDEF) { 753 /* typedef declares no type name */ 754 warning(72); 755 } else { 756 /* empty declaration */ 757 warning(2); 758 } 759 } 760 | begin_type_declmods end_type notype_init_declarators T_SEMI 761 /* ^^ There is no check for the missing type-specifier. */ 762 | begin_type_declaration_specifiers end_type T_SEMI { 763 if (dcs->d_scl == TYPEDEF) { 764 /* typedef declares no type name */ 765 warning(72); 766 } else if (!dcs->d_nonempty_decl) { 767 /* empty declaration */ 768 warning(2); 769 } 770 } 771 | begin_type_declaration_specifiers end_type 772 type_init_declarators T_SEMI 773 | static_assert_declaration 774 ; 775 776 begin_type_declaration_specifiers: /* see C99 6.7 */ 777 begin_type_typespec { 778 add_type($1); 779 } 780 | begin_type_declmods type_specifier { 781 add_type($2); 782 } 783 | type_attribute begin_type_declaration_specifiers 784 | begin_type_declaration_specifiers declmod 785 | begin_type_declaration_specifiers notype_type_specifier { 786 add_type($2); 787 } 788 ; 789 790 begin_type_declmods: /* see C99 6.7 */ 791 begin_type T_QUAL { 792 add_qualifier($2); 793 } 794 | begin_type T_SCLASS { 795 add_storage_class($2); 796 } 797 | begin_type_declmods declmod 798 ; 799 800 begin_type_specifier_qualifier_list: /* see C11 6.7.2.1 */ 801 begin_type_specifier_qualifier_list_postfix 802 | type_attribute_list begin_type_specifier_qualifier_list_postfix 803 ; 804 805 begin_type_specifier_qualifier_list_postfix: 806 begin_type_typespec { 807 add_type($1); 808 } 809 | begin_type_qualifier_list type_specifier { 810 add_type($2); 811 } 812 | begin_type_specifier_qualifier_list_postfix T_QUAL { 813 add_qualifier($2); 814 } 815 | begin_type_specifier_qualifier_list_postfix notype_type_specifier { 816 add_type($2); 817 } 818 | begin_type_specifier_qualifier_list_postfix type_attribute 819 ; 820 821 begin_type_typespec: 822 begin_type notype_type_specifier { 823 $$ = $2; 824 } 825 | T_TYPENAME begin_type { 826 $$ = getsym($1)->s_type; 827 } 828 ; 829 830 begin_type_qualifier_list: 831 begin_type T_QUAL { 832 add_qualifier($2); 833 } 834 | begin_type_qualifier_list T_QUAL { 835 add_qualifier($2); 836 } 837 ; 838 839 declmod: 840 T_QUAL { 841 add_qualifier($1); 842 } 843 | T_SCLASS { 844 add_storage_class($1); 845 } 846 | type_attribute_list 847 ; 848 849 type_attribute_list: 850 type_attribute 851 | type_attribute_list type_attribute 852 ; 853 854 type_attribute_opt: 855 /* empty */ 856 | type_attribute 857 ; 858 859 type_attribute: /* See C11 6.7 declaration-specifiers */ 860 gcc_attribute 861 | T_ALIGNAS T_LPAREN type_specifier T_RPAREN /* C11 6.7.5 */ 862 | T_ALIGNAS T_LPAREN constant_expr T_RPAREN /* C11 6.7.5 */ 863 | T_PACKED { 864 addpacked(); 865 } 866 | T_NORETURN 867 ; 868 869 begin_type: 870 /* empty */ { 871 begin_type(); 872 } 873 ; 874 875 end_type: 876 /* empty */ { 877 end_type(); 878 } 879 ; 880 881 type_specifier: /* C99 6.7.2 */ 882 notype_type_specifier 883 | T_TYPENAME { 884 $$ = getsym($1)->s_type; 885 } 886 ; 887 888 notype_type_specifier: /* see C99 6.7.2 */ 889 T_TYPE { 890 $$ = gettyp($1); 891 } 892 | T_TYPEOF T_LPAREN expression T_RPAREN { /* GCC extension */ 893 $$ = $3->tn_type; 894 } 895 | struct_or_union_specifier { 896 end_declaration_level(); 897 $$ = $1; 898 } 899 | enum_specifier { 900 end_declaration_level(); 901 $$ = $1; 902 } 903 ; 904 905 struct_or_union_specifier: /* C99 6.7.2.1 */ 906 struct_or_union identifier_sym { 907 /* 908 * STDC requires that "struct a;" always introduces 909 * a new tag if "a" is not declared at current level 910 * 911 * yychar is valid because otherwise the parser would not 912 * have been able to decide if it must shift or reduce 913 */ 914 $$ = mktag($2, $1, false, yychar == T_SEMI); 915 } 916 | struct_or_union identifier_sym { 917 dcs->d_tagtyp = mktag($2, $1, true, false); 918 } braced_struct_declaration_list { 919 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 920 } 921 | struct_or_union { 922 dcs->d_tagtyp = mktag(NULL, $1, true, false); 923 } braced_struct_declaration_list { 924 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 925 } 926 | struct_or_union error { 927 symtyp = FVFT; 928 $$ = gettyp(INT); 929 } 930 ; 931 932 struct_or_union: /* C99 6.7.2.1 */ 933 T_STRUCT_OR_UNION { 934 symtyp = FTAG; 935 begin_declaration_level($1 == STRUCT ? MOS : MOU); 936 dcs->d_offset = 0; 937 dcs->d_sou_align_in_bits = CHAR_SIZE; 938 $$ = $1; 939 } 940 | struct_or_union type_attribute 941 ; 942 943 braced_struct_declaration_list: /* see C99 6.7.2.1 */ 944 struct_declaration_lbrace struct_declaration_list_with_rbrace { 945 $$ = $2; 946 } 947 ; 948 949 struct_declaration_lbrace: /* see C99 6.7.2.1 */ 950 T_LBRACE { 951 symtyp = FVFT; 952 } 953 ; 954 955 struct_declaration_list_with_rbrace: /* see C99 6.7.2.1 */ 956 struct_declaration_list T_RBRACE 957 | T_RBRACE { 958 /* XXX: This is not allowed by any C standard. */ 959 $$ = NULL; 960 } 961 ; 962 963 struct_declaration_list: /* C99 6.7.2.1 */ 964 struct_declaration 965 | struct_declaration_list struct_declaration { 966 $$ = lnklst($1, $2); 967 } 968 ; 969 970 struct_declaration: /* C99 6.7.2.1 */ 971 begin_type_qualifier_list end_type { 972 /* ^^ There is no check for the missing type-specifier. */ 973 /* too late, i know, but getsym() compensates it */ 974 symtyp = FMEMBER; 975 } notype_struct_declarators type_attribute_opt T_SEMI { 976 symtyp = FVFT; 977 $$ = $4; 978 } 979 | begin_type_specifier_qualifier_list end_type { 980 symtyp = FMEMBER; 981 } type_struct_declarators type_attribute_opt T_SEMI { 982 symtyp = FVFT; 983 $$ = $4; 984 } 985 | begin_type_qualifier_list end_type type_attribute_opt T_SEMI { 986 /* syntax error '%s' */ 987 error(249, "member without type"); 988 $$ = NULL; 989 } 990 | begin_type_specifier_qualifier_list end_type type_attribute_opt 991 T_SEMI { 992 symtyp = FVFT; 993 if (!Sflag) 994 /* anonymous struct/union members is a C9X feature */ 995 warning(49); 996 if (is_struct_or_union(dcs->d_type->t_tspec)) { 997 $$ = dcs->d_type->t_str->sou_first_member; 998 /* add all the members of the anonymous struct/union */ 999 anonymize($$); 1000 } else { 1001 /* syntax error '%s' */ 1002 error(249, "unnamed member"); 1003 $$ = NULL; 1004 } 1005 } 1006 | static_assert_declaration { 1007 $$ = NULL; 1008 } 1009 | error T_SEMI { 1010 symtyp = FVFT; 1011 $$ = NULL; 1012 } 1013 ; 1014 1015 notype_struct_declarators: 1016 notype_struct_declarator { 1017 $$ = declarator_1_struct_union($1); 1018 } 1019 | notype_struct_declarators { 1020 symtyp = FMEMBER; 1021 } T_COMMA type_struct_declarator { 1022 $$ = lnklst($1, declarator_1_struct_union($4)); 1023 } 1024 ; 1025 1026 type_struct_declarators: 1027 type_struct_declarator { 1028 $$ = declarator_1_struct_union($1); 1029 } 1030 | type_struct_declarators { 1031 symtyp = FMEMBER; 1032 } T_COMMA type_struct_declarator { 1033 $$ = lnklst($1, declarator_1_struct_union($4)); 1034 } 1035 ; 1036 1037 notype_struct_declarator: 1038 notype_declarator 1039 | notype_declarator T_COLON constant_expr { /* C99 6.7.2.1 */ 1040 $$ = bitfield($1, to_int_constant($3, true)); 1041 } 1042 | { 1043 symtyp = FVFT; 1044 } T_COLON constant_expr { /* C99 6.7.2.1 */ 1045 $$ = bitfield(NULL, to_int_constant($3, true)); 1046 } 1047 ; 1048 1049 type_struct_declarator: 1050 type_declarator 1051 | type_declarator T_COLON constant_expr { 1052 $$ = bitfield($1, to_int_constant($3, true)); 1053 } 1054 | { 1055 symtyp = FVFT; 1056 } T_COLON constant_expr { 1057 $$ = bitfield(NULL, to_int_constant($3, true)); 1058 } 1059 ; 1060 1061 enum_specifier: /* C99 6.7.2.2 */ 1062 enum gcc_attribute_list_opt identifier_sym { 1063 $$ = mktag($3, ENUM, false, false); 1064 } 1065 | enum gcc_attribute_list_opt identifier_sym { 1066 dcs->d_tagtyp = mktag($3, ENUM, true, false); 1067 } enum_declaration /*gcc_attribute_list_opt*/ { 1068 $$ = complete_tag_enum(dcs->d_tagtyp, $5); 1069 } 1070 | enum gcc_attribute_list_opt { 1071 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 1072 } enum_declaration /*gcc_attribute_list_opt*/ { 1073 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 1074 } 1075 | enum error { 1076 symtyp = FVFT; 1077 $$ = gettyp(INT); 1078 } 1079 ; 1080 1081 enum: /* helper for C99 6.7.2.2 */ 1082 T_ENUM { 1083 symtyp = FTAG; 1084 begin_declaration_level(CTCONST); 1085 } 1086 ; 1087 1088 enum_declaration: /* helper for C99 6.7.2.2 */ 1089 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 1090 $$ = $2; 1091 } 1092 ; 1093 1094 enum_decl_lbrace: /* helper for C99 6.7.2.2 */ 1095 T_LBRACE { 1096 symtyp = FVFT; 1097 enumval = 0; 1098 } 1099 ; 1100 1101 enums_with_opt_comma: /* helper for C99 6.7.2.2 */ 1102 enumerator_list 1103 | enumerator_list T_COMMA { 1104 if (sflag) { 1105 /* trailing ',' prohibited in enum declaration */ 1106 error(54); 1107 } else { 1108 /* trailing ',' prohibited in enum declaration */ 1109 c99ism(54); 1110 } 1111 $$ = $1; 1112 } 1113 ; 1114 1115 enumerator_list: /* C99 6.7.2.2 */ 1116 enumerator 1117 | enumerator_list T_COMMA enumerator { 1118 $$ = lnklst($1, $3); 1119 } 1120 | error { 1121 $$ = NULL; 1122 } 1123 ; 1124 1125 enumerator: /* C99 6.7.2.2 */ 1126 identifier_sym gcc_attribute_list_opt { 1127 $$ = enumeration_constant($1, enumval, true); 1128 } 1129 | identifier_sym gcc_attribute_list_opt T_ASSIGN constant_expr { 1130 $$ = enumeration_constant($1, to_int_constant($4, true), 1131 false); 1132 } 1133 ; 1134 1135 type_qualifier: /* C99 6.7.3 */ 1136 T_QUAL { 1137 $$ = xcalloc(1, sizeof(*$$)); 1138 if ($1 == CONST) 1139 $$->p_const = true; 1140 if ($1 == VOLATILE) 1141 $$->p_volatile = true; 1142 } 1143 ; 1144 1145 pointer: /* C99 6.7.5 */ 1146 asterisk type_qualifier_list_opt { 1147 $$ = merge_qualified_pointer($1, $2); 1148 } 1149 | asterisk type_qualifier_list_opt pointer { 1150 $$ = merge_qualified_pointer($1, $2); 1151 $$ = merge_qualified_pointer($$, $3); 1152 } 1153 ; 1154 1155 asterisk: /* helper for 'pointer' */ 1156 T_ASTERISK { 1157 $$ = xcalloc(1, sizeof(*$$)); 1158 $$->p_pointer = true; 1159 } 1160 ; 1161 1162 type_qualifier_list_opt: /* see C99 6.7.5 */ 1163 /* empty */ { 1164 $$ = NULL; 1165 } 1166 | type_qualifier_list 1167 ; 1168 1169 type_qualifier_list: /* C99 6.7.5 */ 1170 type_qualifier 1171 | type_qualifier_list type_qualifier { 1172 $$ = merge_qualified_pointer($1, $2); 1173 } 1174 ; 1175 1176 /* 1177 * For an explanation of 'notype' in the following rules, see 1178 * https://www.gnu.org/software/bison/manual/bison.html#Semantic-Tokens. 1179 */ 1180 1181 notype_init_declarators: 1182 notype_init_declarator 1183 | notype_init_declarators T_COMMA type_init_declarator 1184 ; 1185 1186 type_init_declarators: 1187 type_init_declarator 1188 | type_init_declarators T_COMMA type_init_declarator 1189 ; 1190 1191 notype_init_declarator: 1192 notype_declarator asm_or_symbolrename_opt { 1193 cgram_declare($1, false, $2); 1194 check_size($1); 1195 } 1196 | notype_declarator asm_or_symbolrename_opt { 1197 begin_initialization($1); 1198 cgram_declare($1, true, $2); 1199 } T_ASSIGN initializer { 1200 check_size($1); 1201 end_initialization(); 1202 } 1203 ; 1204 1205 type_init_declarator: 1206 type_declarator asm_or_symbolrename_opt { 1207 cgram_declare($1, false, $2); 1208 check_size($1); 1209 } 1210 | type_declarator asm_or_symbolrename_opt { 1211 begin_initialization($1); 1212 cgram_declare($1, true, $2); 1213 } T_ASSIGN initializer { 1214 check_size($1); 1215 end_initialization(); 1216 } 1217 ; 1218 1219 notype_declarator: 1220 notype_direct_declarator 1221 | pointer notype_direct_declarator { 1222 $$ = add_pointer($2, $1); 1223 } 1224 ; 1225 1226 type_declarator: 1227 type_direct_declarator 1228 | pointer type_direct_declarator { 1229 $$ = add_pointer($2, $1); 1230 } 1231 ; 1232 1233 notype_direct_declarator: 1234 T_NAME { 1235 $$ = declarator_name(getsym($1)); 1236 } 1237 | T_LPAREN type_declarator T_RPAREN { 1238 $$ = $2; 1239 } 1240 | type_attribute notype_direct_declarator { 1241 $$ = $2; 1242 } 1243 | notype_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1244 $$ = add_array($1, $3.has_dim, $3.dim); 1245 } 1246 | notype_direct_declarator param_list asm_or_symbolrename_opt { 1247 $$ = add_function(symbolrename($1, $3), $2); 1248 end_declaration_level(); 1249 block_level--; 1250 } 1251 | notype_direct_declarator type_attribute 1252 ; 1253 1254 type_direct_declarator: 1255 identifier { 1256 $$ = declarator_name(getsym($1)); 1257 } 1258 | T_LPAREN type_declarator T_RPAREN { 1259 $$ = $2; 1260 } 1261 | type_attribute type_direct_declarator { 1262 $$ = $2; 1263 } 1264 | type_direct_declarator T_LBRACK array_size_opt T_RBRACK { 1265 $$ = add_array($1, $3.has_dim, $3.dim); 1266 } 1267 | type_direct_declarator param_list asm_or_symbolrename_opt { 1268 $$ = add_function(symbolrename($1, $3), $2); 1269 end_declaration_level(); 1270 block_level--; 1271 } 1272 | type_direct_declarator type_attribute 1273 ; 1274 1275 /* 1276 * The two distinct rules type_param_declarator and notype_param_declarator 1277 * avoid a conflict in argument lists. A typename enclosed in parentheses is 1278 * always treated as a typename, not an argument name. For example, after 1279 * "typedef double a;", the declaration "f(int (a));" is interpreted as 1280 * "f(int (double));", not "f(int a);". 1281 */ 1282 type_param_declarator: 1283 direct_param_declarator 1284 | pointer direct_param_declarator { 1285 $$ = add_pointer($2, $1); 1286 } 1287 ; 1288 1289 notype_param_declarator: 1290 direct_notype_param_declarator 1291 | pointer direct_notype_param_declarator { 1292 $$ = add_pointer($2, $1); 1293 } 1294 ; 1295 1296 direct_param_declarator: 1297 identifier type_attribute_list { 1298 $$ = declarator_name(getsym($1)); 1299 } 1300 | identifier { 1301 $$ = declarator_name(getsym($1)); 1302 } 1303 | T_LPAREN notype_param_declarator T_RPAREN { 1304 $$ = $2; 1305 } 1306 | direct_param_declarator T_LBRACK array_size_opt T_RBRACK 1307 gcc_attribute_list_opt { 1308 $$ = add_array($1, $3.has_dim, $3.dim); 1309 } 1310 | direct_param_declarator param_list asm_or_symbolrename_opt { 1311 $$ = add_function(symbolrename($1, $3), $2); 1312 end_declaration_level(); 1313 block_level--; 1314 } 1315 ; 1316 1317 direct_notype_param_declarator: 1318 identifier { 1319 $$ = declarator_name(getsym($1)); 1320 } 1321 | T_LPAREN notype_param_declarator T_RPAREN { 1322 $$ = $2; 1323 } 1324 | direct_notype_param_declarator T_LBRACK array_size_opt T_RBRACK { 1325 $$ = add_array($1, $3.has_dim, $3.dim); 1326 } 1327 | direct_notype_param_declarator param_list asm_or_symbolrename_opt { 1328 $$ = add_function(symbolrename($1, $3), $2); 1329 end_declaration_level(); 1330 block_level--; 1331 } 1332 ; 1333 1334 param_list: 1335 id_list_lparen identifier_list T_RPAREN { 1336 $$ = $2; 1337 } 1338 | abstract_decl_param_list 1339 ; 1340 1341 id_list_lparen: 1342 T_LPAREN { 1343 block_level++; 1344 begin_declaration_level(PROTO_ARG); 1345 } 1346 ; 1347 1348 array_size_opt: 1349 /* empty */ { 1350 $$.has_dim = false; 1351 $$.dim = 0; 1352 } 1353 | T_ASTERISK { 1354 /* since C99; variable length array of unspecified size */ 1355 $$.has_dim = false; /* TODO: maybe change to true */ 1356 $$.dim = 0; /* just as a placeholder */ 1357 } 1358 | array_size { 1359 $$.has_dim = true; 1360 $$.dim = $1 == NULL ? 0 : to_int_constant($1, false); 1361 } 1362 ; 1363 1364 array_size: 1365 type_qualifier_list_opt T_SCLASS constant_expr { 1366 /* C11 6.7.6.3p7 */ 1367 if ($2 != STATIC) 1368 yyerror("Bad attribute"); 1369 /* static array size is a C11 extension */ 1370 c11ism(343); 1371 $$ = $3; 1372 } 1373 | T_QUAL { 1374 /* C11, 6.7.6.2 */ 1375 if ($1 != RESTRICT) 1376 yyerror("Bad attribute"); 1377 $$ = NULL; 1378 } 1379 | constant_expr 1380 ; 1381 1382 identifier_list: /* C99 6.7.5 */ 1383 T_NAME { 1384 $$ = old_style_function_name(getsym($1)); 1385 } 1386 | identifier_list T_COMMA T_NAME { 1387 $$ = lnklst($1, old_style_function_name(getsym($3))); 1388 } 1389 | identifier_list error 1390 ; 1391 1392 /* XXX: C99 requires an additional specifier-qualifier-list. */ 1393 type_name: /* C99 6.7.6 */ 1394 { 1395 begin_declaration_level(ABSTRACT); 1396 } abstract_declaration { 1397 end_declaration_level(); 1398 $$ = $2->s_type; 1399 } 1400 ; 1401 1402 abstract_declaration: /* specific to lint */ 1403 begin_type_qualifier_list end_type { 1404 $$ = declare_1_abstract(abstract_name()); 1405 } 1406 | begin_type_specifier_qualifier_list end_type { 1407 $$ = declare_1_abstract(abstract_name()); 1408 } 1409 | begin_type_qualifier_list end_type abstract_declarator { 1410 $$ = declare_1_abstract($3); 1411 } 1412 | begin_type_specifier_qualifier_list end_type abstract_declarator { 1413 $$ = declare_1_abstract($3); 1414 } 1415 ; 1416 1417 /* K&R 8.7, C90 ???, C99 6.7.6, C11 6.7.7 */ 1418 /* In K&R, abstract-declarator could be empty and was still simpler. */ 1419 abstract_declarator: 1420 pointer { 1421 $$ = add_pointer(abstract_name(), $1); 1422 } 1423 | direct_abstract_declarator 1424 | pointer direct_abstract_declarator { 1425 $$ = add_pointer($2, $1); 1426 } 1427 ; 1428 1429 /* K&R ---, C90 ???, C99 6.7.6, C11 6.7.7 */ 1430 direct_abstract_declarator: 1431 /* TODO: sort rules according to C99 */ 1432 T_LPAREN abstract_declarator T_RPAREN { 1433 $$ = $2; 1434 } 1435 | T_LBRACK array_size_opt T_RBRACK { 1436 $$ = add_array(abstract_name(), $2.has_dim, $2.dim); 1437 } 1438 | type_attribute direct_abstract_declarator { 1439 $$ = $2; 1440 } 1441 | direct_abstract_declarator T_LBRACK array_size_opt T_RBRACK { 1442 $$ = add_array($1, $3.has_dim, $3.dim); 1443 } 1444 | abstract_decl_param_list asm_or_symbolrename_opt { 1445 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1446 end_declaration_level(); 1447 block_level--; 1448 } 1449 | direct_abstract_declarator abstract_decl_param_list 1450 asm_or_symbolrename_opt { 1451 $$ = add_function(symbolrename($1, $3), $2); 1452 end_declaration_level(); 1453 block_level--; 1454 } 1455 | direct_abstract_declarator type_attribute_list 1456 ; 1457 1458 abstract_decl_param_list: /* specific to lint */ 1459 abstract_decl_lparen T_RPAREN type_attribute_opt { 1460 $$ = NULL; 1461 } 1462 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN 1463 type_attribute_opt { 1464 dcs->d_proto = true; 1465 $$ = $2; 1466 } 1467 | abstract_decl_lparen error T_RPAREN type_attribute_opt { 1468 $$ = NULL; 1469 } 1470 ; 1471 1472 abstract_decl_lparen: /* specific to lint */ 1473 T_LPAREN { 1474 block_level++; 1475 begin_declaration_level(PROTO_ARG); 1476 } 1477 ; 1478 1479 vararg_parameter_type_list: /* specific to lint */ 1480 parameter_type_list 1481 | parameter_type_list T_COMMA T_ELLIPSIS { 1482 dcs->d_vararg = true; 1483 $$ = $1; 1484 } 1485 | T_ELLIPSIS { 1486 if (sflag) { 1487 /* ANSI C requires formal parameter before '...' */ 1488 error(84); 1489 } else if (!tflag) { 1490 /* ANSI C requires formal parameter before '...' */ 1491 warning(84); 1492 } 1493 dcs->d_vararg = true; 1494 $$ = NULL; 1495 } 1496 ; 1497 1498 /* XXX: C99 6.7.5 defines the same name, but it looks different. */ 1499 parameter_type_list: 1500 parameter_declaration 1501 | parameter_type_list T_COMMA parameter_declaration { 1502 $$ = lnklst($1, $3); 1503 } 1504 ; 1505 1506 /* XXX: C99 6.7.5 defines the same name, but it looks completely different. */ 1507 parameter_declaration: 1508 begin_type_declmods end_type { 1509 /* ^^ There is no check for the missing type-specifier. */ 1510 $$ = declare_argument(abstract_name(), false); 1511 } 1512 | begin_type_declaration_specifiers end_type { 1513 $$ = declare_argument(abstract_name(), false); 1514 } 1515 | begin_type_declmods end_type notype_param_declarator { 1516 /* ^^ There is no check for the missing type-specifier. */ 1517 $$ = declare_argument($3, false); 1518 } 1519 /* 1520 * type_param_declarator is needed because of following conflict: 1521 * "typedef int a; f(int (a));" could be parsed as 1522 * "function with argument a of type int", or 1523 * "function with an abstract argument of type function". 1524 * This grammar realizes the second case. 1525 */ 1526 | begin_type_declaration_specifiers end_type type_param_declarator { 1527 $$ = declare_argument($3, false); 1528 } 1529 | begin_type_declmods end_type abstract_declarator { 1530 /* ^^ There is no check for the missing type-specifier. */ 1531 $$ = declare_argument($3, false); 1532 } 1533 | begin_type_declaration_specifiers end_type abstract_declarator { 1534 $$ = declare_argument($3, false); 1535 } 1536 ; 1537 1538 initializer: /* C99 6.7.8 "Initialization" */ 1539 assignment_expression { 1540 init_expr($1); 1541 } 1542 | init_lbrace init_rbrace { 1543 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1544 } 1545 | init_lbrace initializer_list comma_opt init_rbrace 1546 /* XXX: What is this error handling for? */ 1547 | error 1548 ; 1549 1550 initializer_list: /* C99 6.7.8 "Initialization" */ 1551 initializer_list_item 1552 | initializer_list T_COMMA initializer_list_item 1553 ; 1554 1555 initializer_list_item: /* helper */ 1556 designation initializer 1557 | initializer 1558 ; 1559 1560 designation: /* C99 6.7.8 "Initialization" */ 1561 designator_list T_ASSIGN 1562 | identifier T_COLON { 1563 /* GCC style struct or union member name in initializer */ 1564 gnuism(315); 1565 add_designator_member($1); 1566 } 1567 ; 1568 1569 designator_list: /* C99 6.7.8 "Initialization" */ 1570 designator 1571 | designator_list designator 1572 ; 1573 1574 designator: /* C99 6.7.8 "Initialization" */ 1575 T_LBRACK range T_RBRACK { 1576 add_designator_subscript($2); 1577 if (!Sflag) 1578 /* array initializer with designators is a C9X ... */ 1579 warning(321); 1580 } 1581 | T_POINT identifier { 1582 if (!Sflag) 1583 /* struct or union member name in initializer is ... */ 1584 warning(313); 1585 add_designator_member($2); 1586 } 1587 ; 1588 1589 static_assert_declaration: 1590 T_STATIC_ASSERT T_LPAREN constant_expr T_COMMA T_STRING T_RPAREN T_SEMI /* C11 */ 1591 | T_STATIC_ASSERT T_LPAREN constant_expr T_RPAREN T_SEMI /* C23 */ 1592 ; 1593 1594 range: 1595 constant_expr { 1596 $$.lo = to_int_constant($1, true); 1597 $$.hi = $$.lo; 1598 } 1599 | constant_expr T_ELLIPSIS constant_expr { 1600 $$.lo = to_int_constant($1, true); 1601 $$.hi = to_int_constant($3, true); 1602 /* initialization with '[a...b]' is a GCC extension */ 1603 gnuism(340); 1604 } 1605 ; 1606 1607 init_lbrace: /* helper */ 1608 T_LBRACE { 1609 init_lbrace(); 1610 } 1611 ; 1612 1613 init_rbrace: /* helper */ 1614 T_RBRACE { 1615 init_rbrace(); 1616 } 1617 ; 1618 1619 asm_or_symbolrename_opt: /* GCC extensions */ 1620 /* empty */ { 1621 $$ = NULL; 1622 } 1623 | T_ASM T_LPAREN T_STRING T_RPAREN gcc_attribute_list_opt { 1624 freeyyv(&$3, T_STRING); 1625 $$ = NULL; 1626 } 1627 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN gcc_attribute_list_opt { 1628 $$ = $3; 1629 } 1630 ; 1631 1632 statement: /* C99 6.8 */ 1633 expression_statement 1634 | non_expr_statement 1635 ; 1636 1637 non_expr_statement: /* helper for C99 6.8 */ 1638 type_attribute T_SEMI 1639 | labeled_statement 1640 | compound_statement 1641 | selection_statement 1642 | iteration_statement 1643 | jump_statement { 1644 seen_fallthrough = false; 1645 } 1646 | asm_statement 1647 ; 1648 1649 labeled_statement: /* C99 6.8.1 */ 1650 label type_attribute_opt statement 1651 ; 1652 1653 label: 1654 T_NAME T_COLON { 1655 symtyp = FLABEL; 1656 named_label(getsym($1)); 1657 } 1658 | T_CASE constant_expr T_COLON { 1659 case_label($2); 1660 seen_fallthrough = true; 1661 } 1662 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1663 /* XXX: We don't fill all cases */ 1664 case_label($2); 1665 seen_fallthrough = true; 1666 } 1667 | T_DEFAULT T_COLON { 1668 default_label(); 1669 seen_fallthrough = true; 1670 } 1671 ; 1672 1673 compound_statement: /* C99 6.8.2 */ 1674 compound_statement_lbrace compound_statement_rbrace 1675 | compound_statement_lbrace block_item_list compound_statement_rbrace 1676 ; 1677 1678 compound_statement_lbrace: 1679 T_LBRACE { 1680 block_level++; 1681 mem_block_level++; 1682 begin_declaration_level(AUTO); 1683 } 1684 ; 1685 1686 compound_statement_rbrace: 1687 T_RBRACE { 1688 end_declaration_level(); 1689 freeblk(); 1690 mem_block_level--; 1691 block_level--; 1692 seen_fallthrough = false; 1693 } 1694 ; 1695 1696 block_item_list: /* C99 6.8.2 */ 1697 block_item 1698 | block_item_list block_item { 1699 if (!Sflag && $1 && !$2) 1700 /* declarations after statements is a C99 feature */ 1701 c99ism(327); 1702 $$ = $1 || $2; 1703 } 1704 ; 1705 1706 block_item: /* C99 6.8.2 */ 1707 declaration_or_error { 1708 $$ = false; 1709 restore_warning_flags(); 1710 } 1711 | statement { 1712 $$ = true; 1713 restore_warning_flags(); 1714 } 1715 ; 1716 1717 expression_statement: /* C99 6.8.3 */ 1718 expression T_SEMI { 1719 expr($1, false, false, false, false); 1720 seen_fallthrough = false; 1721 } 1722 | T_SEMI { 1723 seen_fallthrough = false; 1724 } 1725 ; 1726 1727 selection_statement: /* C99 6.8.4 */ 1728 if_without_else %prec T_THEN { 1729 save_warning_flags(); 1730 if2(); 1731 if3(false); 1732 } 1733 | if_without_else T_ELSE { 1734 save_warning_flags(); 1735 if2(); 1736 } statement { 1737 clear_warning_flags(); 1738 if3(true); 1739 } 1740 | if_without_else T_ELSE error { 1741 clear_warning_flags(); 1742 if3(false); 1743 } 1744 | switch_expr statement { 1745 clear_warning_flags(); 1746 switch2(); 1747 } 1748 | switch_expr error { 1749 clear_warning_flags(); 1750 switch2(); 1751 } 1752 ; 1753 1754 if_without_else: /* see C99 6.8.4 */ 1755 if_expr statement 1756 | if_expr error 1757 ; 1758 1759 if_expr: /* see C99 6.8.4 */ 1760 T_IF T_LPAREN expression T_RPAREN { 1761 if1($3); 1762 clear_warning_flags(); 1763 } 1764 ; 1765 1766 switch_expr: /* see C99 6.8.4 */ 1767 T_SWITCH T_LPAREN expression T_RPAREN { 1768 switch1($3); 1769 clear_warning_flags(); 1770 } 1771 ; 1772 1773 iteration_statement: /* C99 6.8.5 */ 1774 while_expr statement { 1775 clear_warning_flags(); 1776 while2(); 1777 } 1778 | while_expr error { 1779 clear_warning_flags(); 1780 while2(); 1781 } 1782 | do_statement do_while_expr { 1783 do2($2); 1784 seen_fallthrough = false; 1785 } 1786 | do error { 1787 clear_warning_flags(); 1788 do2(NULL); 1789 } 1790 | for_exprs statement { 1791 clear_warning_flags(); 1792 for2(); 1793 end_declaration_level(); 1794 block_level--; 1795 } 1796 | for_exprs error { 1797 clear_warning_flags(); 1798 for2(); 1799 end_declaration_level(); 1800 block_level--; 1801 } 1802 ; 1803 1804 while_expr: /* see C99 6.8.5 */ 1805 T_WHILE T_LPAREN expression T_RPAREN { 1806 while1($3); 1807 clear_warning_flags(); 1808 } 1809 ; 1810 1811 do_statement: /* see C99 6.8.5 */ 1812 do statement { 1813 clear_warning_flags(); 1814 } 1815 ; 1816 1817 do: /* see C99 6.8.5 */ 1818 T_DO { 1819 do1(); 1820 } 1821 ; 1822 1823 do_while_expr: /* see C99 6.8.5 */ 1824 T_WHILE T_LPAREN expression T_RPAREN T_SEMI { 1825 $$ = $3; 1826 } 1827 ; 1828 1829 for_start: /* see C99 6.8.5 */ 1830 T_FOR T_LPAREN { 1831 begin_declaration_level(AUTO); 1832 block_level++; 1833 } 1834 ; 1835 1836 for_exprs: /* see C99 6.8.5 */ 1837 for_start 1838 begin_type_declaration_specifiers end_type 1839 notype_init_declarators T_SEMI 1840 expression_opt T_SEMI expression_opt T_RPAREN { 1841 /* variable declaration in for loop */ 1842 c99ism(325); 1843 for1(NULL, $6, $8); 1844 clear_warning_flags(); 1845 } 1846 | for_start 1847 expression_opt T_SEMI 1848 expression_opt T_SEMI 1849 expression_opt T_RPAREN { 1850 for1($2, $4, $6); 1851 clear_warning_flags(); 1852 } 1853 ; 1854 1855 jump_statement: /* C99 6.8.6 */ 1856 goto identifier T_SEMI { 1857 do_goto(getsym($2)); 1858 } 1859 | goto error T_SEMI { 1860 symtyp = FVFT; 1861 } 1862 | T_CONTINUE T_SEMI { 1863 do_continue(); 1864 } 1865 | T_BREAK T_SEMI { 1866 do_break(); 1867 } 1868 | T_RETURN sys T_SEMI { 1869 do_return($2, NULL); 1870 } 1871 | T_RETURN sys expression T_SEMI { 1872 do_return($2, $3); 1873 } 1874 ; 1875 1876 goto: /* see C99 6.8.6 */ 1877 T_GOTO { 1878 symtyp = FLABEL; 1879 } 1880 ; 1881 1882 asm_statement: /* GCC extension */ 1883 T_ASM T_LPAREN read_until_rparen T_SEMI { 1884 setasm(); 1885 } 1886 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1887 setasm(); 1888 } 1889 | T_ASM error 1890 ; 1891 1892 read_until_rparen: /* helper for 'asm_statement' */ 1893 /* empty */ { 1894 read_until_rparen(); 1895 } 1896 ; 1897 1898 translation_unit: /* C99 6.9 */ 1899 external_declaration 1900 | translation_unit external_declaration 1901 ; 1902 1903 external_declaration: /* C99 6.9 */ 1904 function_definition { 1905 global_clean_up_decl(false); 1906 clear_warning_flags(); 1907 } 1908 | top_level_declaration { 1909 global_clean_up_decl(false); 1910 clear_warning_flags(); 1911 } 1912 | asm_statement /* GCC extension */ 1913 | T_SEMI { /* GCC extension */ 1914 if (sflag) { 1915 /* empty declaration */ 1916 error(0); 1917 } else if (!tflag) { 1918 /* empty declaration */ 1919 warning(0); 1920 } 1921 } 1922 ; 1923 1924 /* 1925 * On the top level, lint allows several forms of declarations that it doesn't 1926 * allow in functions. For example, a single ';' is an empty declaration and 1927 * is supported by some compilers, but in a function it would be an empty 1928 * statement, not a declaration. This makes a difference in C90 mode, where 1929 * a statement must not be followed by a declaration. 1930 * 1931 * See 'declaration' for all other declarations. 1932 */ 1933 top_level_declaration: /* C99 6.9 calls this 'declaration' */ 1934 begin_type end_type notype_init_declarators T_SEMI { 1935 if (sflag) { 1936 /* old style declaration; add 'int' */ 1937 error(1); 1938 } else if (!tflag) { 1939 /* old style declaration; add 'int' */ 1940 warning(1); 1941 } 1942 } 1943 | declaration 1944 | error T_SEMI { 1945 global_clean_up(); 1946 } 1947 | error T_RBRACE { 1948 global_clean_up(); 1949 } 1950 ; 1951 1952 function_definition: /* C99 6.9.1 */ 1953 func_declarator { 1954 if ($1->s_type->t_tspec != FUNC) { 1955 /* syntax error '%s' */ 1956 error(249, yytext); 1957 YYERROR; 1958 } 1959 if ($1->s_type->t_typedef) { 1960 /* ()-less function definition */ 1961 error(64); 1962 YYERROR; 1963 } 1964 funcdef($1); 1965 block_level++; 1966 begin_declaration_level(ARG); 1967 if (lwarn == LWARN_NONE) 1968 $1->s_used = true; 1969 } arg_declaration_list_opt { 1970 end_declaration_level(); 1971 block_level--; 1972 check_func_lint_directives(); 1973 check_func_old_style_arguments(); 1974 begin_control_statement(CS_FUNCTION_BODY); 1975 } compound_statement { 1976 funcend(); 1977 end_control_statement(CS_FUNCTION_BODY); 1978 } 1979 ; 1980 1981 func_declarator: 1982 begin_type end_type notype_declarator { 1983 /* ^^ There is no check for the missing type-specifier. */ 1984 $$ = $3; 1985 } 1986 | begin_type_declmods end_type notype_declarator { 1987 /* ^^ There is no check for the missing type-specifier. */ 1988 $$ = $3; 1989 } 1990 | begin_type_declaration_specifiers end_type type_declarator { 1991 $$ = $3; 1992 } 1993 ; 1994 1995 arg_declaration_list_opt: /* C99 6.9.1p13 example 1 */ 1996 /* empty */ 1997 | arg_declaration_list 1998 ; 1999 2000 arg_declaration_list: /* C99 6.9.1p13 example 1 */ 2001 arg_declaration 2002 | arg_declaration_list arg_declaration 2003 /* XXX or better "arg_declaration error" ? */ 2004 | error 2005 ; 2006 2007 /* 2008 * "arg_declaration" is separated from "declaration" because it 2009 * needs other error handling. 2010 */ 2011 arg_declaration: 2012 begin_type_declmods end_type T_SEMI { 2013 /* empty declaration */ 2014 warning(2); 2015 } 2016 | begin_type_declmods end_type notype_init_declarators T_SEMI 2017 | begin_type_declaration_specifiers end_type T_SEMI { 2018 if (!dcs->d_nonempty_decl) { 2019 /* empty declaration */ 2020 warning(2); 2021 } else { 2022 /* '%s' declared in argument declaration list */ 2023 warning(3, type_name(dcs->d_type)); 2024 } 2025 } 2026 | begin_type_declaration_specifiers end_type 2027 type_init_declarators T_SEMI { 2028 if (dcs->d_nonempty_decl) { 2029 /* '%s' declared in argument declaration list */ 2030 warning(3, type_name(dcs->d_type)); 2031 } 2032 } 2033 | begin_type_declmods error 2034 | begin_type_declaration_specifiers error 2035 ; 2036 2037 gcc_attribute_list_opt: 2038 /* empty */ 2039 | gcc_attribute_list 2040 ; 2041 2042 gcc_attribute_list: 2043 gcc_attribute 2044 | gcc_attribute_list gcc_attribute 2045 ; 2046 2047 gcc_attribute: 2048 T_ATTRIBUTE T_LPAREN T_LPAREN { 2049 in_gcc_attribute = true; 2050 } gcc_attribute_spec_list { 2051 in_gcc_attribute = false; 2052 } T_RPAREN T_RPAREN 2053 ; 2054 2055 gcc_attribute_spec_list: 2056 gcc_attribute_spec 2057 | gcc_attribute_spec_list T_COMMA gcc_attribute_spec 2058 ; 2059 2060 gcc_attribute_spec: 2061 /* empty */ 2062 | T_AT_ALWAYS_INLINE 2063 | T_AT_ALIAS T_LPAREN string T_RPAREN 2064 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 2065 | T_AT_ALIGNED 2066 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 2067 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 2068 | T_AT_BOUNDED T_LPAREN gcc_attribute_bounded 2069 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 2070 | T_AT_COLD 2071 | T_AT_COMMON 2072 | T_AT_CONSTRUCTOR T_LPAREN constant_expr T_RPAREN 2073 | T_AT_CONSTRUCTOR 2074 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 2075 | T_AT_DEPRECATED 2076 | T_AT_DESTRUCTOR T_LPAREN constant_expr T_RPAREN 2077 | T_AT_DESTRUCTOR 2078 | T_AT_FALLTHROUGH { 2079 fallthru(1); 2080 } 2081 | T_AT_FORMAT T_LPAREN gcc_attribute_format T_COMMA 2082 constant_expr T_COMMA constant_expr T_RPAREN 2083 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 2084 | T_AT_GNU_INLINE 2085 | T_AT_HOT 2086 | T_AT_MALLOC 2087 | T_AT_MAY_ALIAS 2088 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 2089 | T_AT_NOINLINE 2090 | T_AT_NONNULL T_LPAREN constant_expr_list_opt T_RPAREN 2091 | T_AT_NONNULL 2092 | T_AT_NONSTRING 2093 | T_AT_NORETURN 2094 | T_AT_NOTHROW 2095 | T_AT_NO_INSTRUMENT_FUNCTION 2096 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 2097 | T_AT_PACKED { 2098 addpacked(); 2099 } 2100 | T_AT_PCS T_LPAREN string T_RPAREN 2101 | T_AT_PURE 2102 | T_AT_REGPARM T_LPAREN constant_expr T_RPAREN 2103 | T_AT_RETURNS_NONNULL 2104 | T_AT_RETURNS_TWICE 2105 | T_AT_SECTION T_LPAREN string T_RPAREN 2106 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 2107 | T_AT_SENTINEL 2108 | T_AT_TARGET T_LPAREN string T_RPAREN 2109 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 2110 | T_AT_TUNION 2111 | T_AT_UNUSED { 2112 add_attr_used(); 2113 } 2114 | T_AT_USED { 2115 add_attr_used(); 2116 } 2117 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 2118 | T_AT_WARN_UNUSED_RESULT 2119 | T_AT_WEAK 2120 | T_QUAL { 2121 if ($1 != CONST) 2122 yyerror("Bad attribute"); 2123 } 2124 ; 2125 2126 gcc_attribute_bounded: 2127 T_AT_MINBYTES 2128 | T_AT_STRING 2129 | T_AT_BUFFER 2130 ; 2131 2132 gcc_attribute_format: 2133 T_AT_FORMAT_GNU_PRINTF 2134 | T_AT_FORMAT_PRINTF 2135 | T_AT_FORMAT_SCANF 2136 | T_AT_FORMAT_STRFMON 2137 | T_AT_FORMAT_STRFTIME 2138 | T_AT_FORMAT_SYSLOG 2139 ; 2140 2141 sys: 2142 /* empty */ { 2143 $$ = in_system_header; 2144 } 2145 ; 2146 2147 %% 2148 2149 /* ARGSUSED */ 2150 int 2151 yyerror(const char *msg) 2152 { 2153 /* syntax error '%s' */ 2154 error(249, yytext); 2155 if (++sytxerr >= 5) 2156 norecover(); 2157 return 0; 2158 } 2159 2160 #if (defined(YYDEBUG) && YYDEBUG > 0 && defined(YYBYACC)) \ 2161 || (defined(YYDEBUG) && defined(YYBISON)) 2162 static const char * 2163 cgram_to_string(int token, YYSTYPE val) 2164 { 2165 static const char *tqual_name[] = { 2166 "const", "volatile", "restrict", "_Thread_local" 2167 }; 2168 2169 switch (token) { 2170 case T_INCDEC: 2171 case T_MULTIPLICATIVE: 2172 case T_ADDITIVE: 2173 case T_SHIFT: 2174 case T_RELATIONAL: 2175 case T_EQUALITY: 2176 case T_OPASSIGN: 2177 return modtab[val.y_op].m_name; 2178 case T_SCLASS: 2179 return scl_name(val.y_scl); 2180 case T_TYPE: 2181 case T_STRUCT_OR_UNION: 2182 return tspec_name(val.y_tspec); 2183 case T_QUAL: 2184 return tqual_name[val.y_tqual]; 2185 case T_NAME: 2186 return val.y_name->sb_name; 2187 default: 2188 return "<none>"; 2189 } 2190 } 2191 #endif 2192 2193 #if defined(YYDEBUG) && defined(YYBISON) 2194 static inline void 2195 cgram_print(FILE *output, int token, YYSTYPE val) 2196 { 2197 (void)fprintf(output, "%s", cgram_to_string(token, val)); 2198 } 2199 #endif 2200 2201 static void 2202 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2203 { 2204 declare(decl, initflg, renaming); 2205 if (renaming != NULL) 2206 freeyyv(&renaming, T_NAME); 2207 } 2208 2209 /* 2210 * Discard all input tokens up to and including the next 2211 * unmatched right paren 2212 */ 2213 static void 2214 read_until_rparen(void) 2215 { 2216 int level; 2217 2218 if (yychar < 0) 2219 yychar = yylex(); 2220 freeyyv(&yylval, yychar); 2221 2222 level = 1; 2223 while (yychar != T_RPAREN || --level > 0) { 2224 if (yychar == T_LPAREN) { 2225 level++; 2226 } else if (yychar <= 0) { 2227 break; 2228 } 2229 freeyyv(&yylval, yychar = yylex()); 2230 } 2231 2232 yyclearin; 2233 } 2234 2235 static sym_t * 2236 symbolrename(sym_t *s, sbuf_t *sb) 2237 { 2238 if (sb != NULL) 2239 s->s_rename = sb->sb_name; 2240 return s; 2241 } 2242
Indexes created Thu Oct 02 14:10:14 GMT 2025