cgram.y revision 1.186
1 %{ 2 /* $NetBSD: cgram.y,v 1.186 2021/03/20 15:30:58 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 1.186 2021/03/20 15:30:58 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 ignore_up_to_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 printf("%s, %d: clear flags %s %zu\n", curr_pos.p_file, 79 curr_pos.p_line, file, line); 80 clear_warn_flags(); 81 olwarn = LWARN_BAD; 82 } 83 84 static void 85 SAVE_WARN_FLAGS(const char *file, size_t line) 86 { 87 lint_assert(olwarn == LWARN_BAD); 88 printf("%s, %d: save flags %s %zu = %d\n", curr_pos.p_file, 89 curr_pos.p_line, file, line, lwarn); 90 olwarn = lwarn; 91 } 92 93 static void 94 RESTORE_WARN_FLAGS(const char *file, size_t line) 95 { 96 if (olwarn != LWARN_BAD) { 97 lwarn = olwarn; 98 printf("%s, %d: restore flags %s %zu = %d\n", curr_pos.p_file, 99 curr_pos.p_line, file, line, lwarn); 100 olwarn = LWARN_BAD; 101 } else 102 CLEAR_WARN_FLAGS(file, line); 103 } 104 #define cgram_debug(fmt, args...) printf("cgram_debug: " fmt "\n", ##args) 105 #else 106 #define CLEAR_WARN_FLAGS(f, l) clear_warn_flags(), olwarn = LWARN_BAD 107 #define SAVE_WARN_FLAGS(f, l) olwarn = lwarn 108 #define RESTORE_WARN_FLAGS(f, l) \ 109 (void)(olwarn == LWARN_BAD ? (clear_warn_flags(), 0) : (lwarn = olwarn)) 110 #define cgram_debug(fmt, args...) do { } while (false) 111 #endif 112 113 /* unbind the anonymous struct members from the struct */ 114 static void 115 anonymize(sym_t *s) 116 { 117 for ( ; s; s = s->s_next) 118 s->s_styp = NULL; 119 } 120 %} 121 122 %expect 134 123 124 %union { 125 int y_int; 126 val_t *y_val; 127 sbuf_t *y_sb; 128 sym_t *y_sym; 129 op_t y_op; 130 scl_t y_scl; 131 tspec_t y_tspec; 132 tqual_t y_tqual; 133 type_t *y_type; 134 tnode_t *y_tnode; 135 range_t y_range; 136 strg_t *y_string; 137 pqinf_t *y_pqinf; 138 int y_seen_statement; 139 }; 140 141 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 142 %token <y_op> T_MEMBACC 143 %token <y_op> T_UNARY 144 %token <y_op> T_INCDEC 145 %token T_SIZEOF 146 %token T_BUILTIN_OFFSETOF 147 %token T_TYPEOF 148 %token T_EXTENSION 149 %token T_ALIGNOF 150 %token <y_op> T_ASTERISK 151 %token <y_op> T_MULTIPLICATIVE 152 %token <y_op> T_ADDITIVE 153 %token <y_op> T_SHIFT 154 %token <y_op> T_RELATIONAL 155 %token <y_op> T_EQUALITY 156 %token <y_op> T_AMPER 157 %token <y_op> T_XOR 158 %token <y_op> T_BITOR 159 %token <y_op> T_LOGAND 160 %token <y_op> T_LOGOR 161 %token T_QUEST 162 %token T_COLON 163 %token <y_op> T_ASSIGN 164 %token <y_op> T_OPASSIGN 165 %token T_COMMA 166 %token T_SEMI 167 %token T_ELLIPSIS 168 %token T_REAL 169 %token T_IMAG 170 %token T_GENERIC 171 %token T_NORETURN 172 173 /* storage classes (extern, static, auto, register and typedef) */ 174 %token <y_scl> T_SCLASS 175 176 /* 177 * predefined type keywords (char, int, short, long, unsigned, signed, 178 * float, double, void); see T_TYPENAME 179 */ 180 %token <y_tspec> T_TYPE 181 182 /* qualifiers (const, volatile, restrict, _Thread_local) */ 183 %token <y_tqual> T_QUAL 184 185 /* struct or union */ 186 %token <y_tspec> T_STRUCT_OR_UNION 187 188 /* remaining keywords */ 189 %token T_ASM 190 %token T_BREAK 191 %token T_CASE 192 %token T_CONTINUE 193 %token T_DEFAULT 194 %token T_DO 195 %token T_ELSE 196 %token T_ENUM 197 %token T_FOR 198 %token T_GOTO 199 %token T_IF 200 %token T_PACKED 201 %token T_RETURN 202 %token T_SWITCH 203 %token T_SYMBOLRENAME 204 %token T_WHILE 205 /* Type Attributes */ 206 %token <y_type> T_ATTRIBUTE 207 %token <y_type> T_AT_ALIAS 208 %token <y_type> T_AT_ALIGNED 209 %token <y_type> T_AT_ALLOC_SIZE 210 %token <y_type> T_AT_ALWAYS_INLINE 211 %token <y_type> T_AT_BOUNDED 212 %token <y_type> T_AT_BUFFER 213 %token <y_type> T_AT_COLD 214 %token <y_type> T_AT_CONSTRUCTOR 215 %token <y_type> T_AT_DEPRECATED 216 %token <y_type> T_AT_DESTRUCTOR 217 %token <y_type> T_AT_FORMAT 218 %token <y_type> T_AT_FORMAT_ARG 219 %token <y_type> T_AT_FORMAT_GNU_PRINTF 220 %token <y_type> T_AT_FORMAT_PRINTF 221 %token <y_type> T_AT_FORMAT_SCANF 222 %token <y_type> T_AT_FORMAT_STRFMON 223 %token <y_type> T_AT_FORMAT_STRFTIME 224 %token <y_type> T_AT_FORMAT_SYSLOG 225 %token <y_type> T_AT_GNU_INLINE 226 %token <y_type> T_AT_MALLOC 227 %token <y_type> T_AT_MAY_ALIAS 228 %token <y_type> T_AT_MINBYTES 229 %token <y_type> T_AT_MODE 230 %token <y_type> T_AT_NOINLINE 231 %token <y_type> T_AT_NONNULL 232 %token <y_type> T_AT_NORETURN 233 %token <y_type> T_AT_NOTHROW 234 %token <y_type> T_AT_NO_INSTRUMENT_FUNCTION 235 %token <y_type> T_AT_OPTIMIZE 236 %token <y_type> T_AT_PACKED 237 %token <y_type> T_AT_PCS 238 %token <y_type> T_AT_PURE 239 %token <y_type> T_AT_RETURNS_TWICE 240 %token <y_type> T_AT_SECTION 241 %token <y_type> T_AT_SENTINEL 242 %token <y_type> T_AT_STRING 243 %token <y_type> T_AT_TLS_MODEL 244 %token <y_type> T_AT_TUNION 245 %token <y_type> T_AT_UNUSED 246 %token <y_type> T_AT_USED 247 %token <y_type> T_AT_VISIBILITY 248 %token <y_type> T_AT_WARN_UNUSED_RESULT 249 %token <y_type> T_AT_WEAK 250 251 %left T_COMMA 252 %right T_ASSIGN T_OPASSIGN 253 %right T_QUEST T_COLON 254 %left T_LOGOR 255 %left T_LOGAND 256 %left T_BITOR 257 %left T_XOR 258 %left T_AMPER 259 %left T_EQUALITY 260 %left T_RELATIONAL 261 %left T_SHIFT 262 %left T_ADDITIVE 263 %left T_ASTERISK T_MULTIPLICATIVE 264 %right T_UNARY T_INCDEC T_SIZEOF T_BUILTIN_OFFSETOF T_ALIGNOF T_REAL T_IMAG 265 %left T_LPAREN T_LBRACK T_MEMBACC 266 267 %token <y_sb> T_NAME 268 %token <y_sb> T_TYPENAME 269 %token <y_val> T_CON 270 %token <y_string> T_STRING 271 272 %type <y_sym> func_decl 273 %type <y_sym> notype_decl 274 %type <y_sym> type_decl 275 %type <y_type> typespec 276 %type <y_type> clrtyp_typespec 277 %type <y_type> notype_typespec 278 %type <y_type> struct_spec 279 %type <y_type> enum_spec 280 %type <y_type> type_attribute 281 %type <y_sym> struct_tag 282 %type <y_sym> enum_tag 283 %type <y_tspec> struct 284 %type <y_sym> struct_declaration 285 %type <y_sb> identifier 286 %type <y_sym> member_declaration_list_with_rbrace 287 %type <y_sym> member_declaration_list 288 %type <y_sym> member_declaration 289 %type <y_sym> notype_member_decls 290 %type <y_sym> type_member_decls 291 %type <y_sym> notype_member_decl 292 %type <y_sym> type_member_decl 293 %type <y_tnode> constant_expr 294 %type <y_sym> enum_declaration 295 %type <y_sym> enums_with_opt_comma 296 %type <y_sym> enums 297 %type <y_sym> enumerator 298 %type <y_sym> enumeration_constant 299 %type <y_sym> notype_direct_decl 300 %type <y_sym> type_direct_decl 301 %type <y_pqinf> pointer 302 %type <y_pqinf> asterisk 303 %type <y_sym> param_decl 304 %type <y_sym> param_list 305 %type <y_sym> abstract_decl_param_list 306 %type <y_sym> direct_param_decl 307 %type <y_sym> notype_param_decl 308 %type <y_sym> direct_notype_param_decl 309 %type <y_pqinf> type_qualifier_list 310 %type <y_pqinf> type_qualifier 311 %type <y_sym> identifier_list 312 %type <y_sym> abstract_decl 313 %type <y_sym> direct_abstract_decl 314 %type <y_sym> vararg_parameter_type_list 315 %type <y_sym> parameter_type_list 316 %type <y_sym> parameter_declaration 317 %type <y_tnode> expr 318 %type <y_tnode> expr_statement_val 319 %type <y_tnode> expr_statement_list 320 %type <y_tnode> term 321 %type <y_tnode> generic_expr 322 %type <y_tnode> func_arg_list 323 %type <y_op> point_or_arrow 324 %type <y_type> type_name 325 %type <y_sym> abstract_declaration 326 %type <y_tnode> do_while_expr 327 %type <y_tnode> opt_expr 328 %type <y_string> string 329 %type <y_string> string2 330 %type <y_sb> opt_asm_or_symbolrename 331 %type <y_range> range 332 %type <y_seen_statement> block_item_list 333 %type <y_seen_statement> block_item 334 335 336 %% 337 338 program: 339 /* empty */ { 340 if (sflag) { 341 /* empty translation unit */ 342 error(272); 343 } else if (!tflag) { 344 /* empty translation unit */ 345 warning(272); 346 } 347 } 348 | translation_unit 349 ; 350 351 translation_unit: /* C99 6.9 */ 352 external_declaration 353 | translation_unit external_declaration 354 ; 355 356 external_declaration: /* C99 6.9 */ 357 asm_statement 358 | function_definition { 359 global_clean_up_decl(false); 360 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 361 } 362 | data_def { 363 global_clean_up_decl(false); 364 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 365 } 366 ; 367 368 data_def: 369 T_SEMI { 370 if (sflag) { 371 /* empty declaration */ 372 error(0); 373 } else if (!tflag) { 374 /* empty declaration */ 375 warning(0); 376 } 377 } 378 | clrtyp deftyp notype_init_decls T_SEMI { 379 if (sflag) { 380 /* old style declaration; add 'int' */ 381 error(1); 382 } else if (!tflag) { 383 /* old style declaration; add 'int' */ 384 warning(1); 385 } 386 } 387 | declmods deftyp T_SEMI { 388 if (dcs->d_scl == TYPEDEF) { 389 /* typedef declares no type name */ 390 warning(72); 391 } else { 392 /* empty declaration */ 393 warning(2); 394 } 395 } 396 | declmods deftyp notype_init_decls T_SEMI 397 | declspecs deftyp T_SEMI { 398 if (dcs->d_scl == TYPEDEF) { 399 /* typedef declares no type name */ 400 warning(72); 401 } else if (!dcs->d_nedecl) { 402 /* empty declaration */ 403 warning(2); 404 } 405 } 406 | declspecs deftyp type_init_decls T_SEMI 407 | error T_SEMI { 408 global_clean_up(); 409 } 410 | error T_RBRACE { 411 global_clean_up(); 412 } 413 ; 414 415 function_definition: /* C99 6.9.1 */ 416 func_decl { 417 if ($1->s_type->t_tspec != FUNC) { 418 /* syntax error '%s' */ 419 error(249, yytext); 420 YYERROR; 421 } 422 if ($1->s_type->t_typedef) { 423 /* ()-less function definition */ 424 error(64); 425 YYERROR; 426 } 427 funcdef($1); 428 block_level++; 429 pushdecl(ARG); 430 if (lwarn == LWARN_NONE) 431 $1->s_used = true; 432 } arg_declaration_list_opt { 433 popdecl(); 434 block_level--; 435 check_func_lint_directives(); 436 check_func_old_style_arguments(); 437 pushctrl(0); 438 } compound_statement { 439 funcend(); 440 popctrl(0); 441 } 442 ; 443 444 func_decl: 445 clrtyp deftyp notype_decl { 446 $$ = $3; 447 } 448 | declmods deftyp notype_decl { 449 $$ = $3; 450 } 451 | declspecs deftyp type_decl { 452 $$ = $3; 453 } 454 ; 455 456 arg_declaration_list_opt: 457 /* empty */ 458 | arg_declaration_list 459 ; 460 461 arg_declaration_list: 462 arg_declaration 463 | arg_declaration_list arg_declaration 464 /* XXX or better "arg_declaration error" ? */ 465 | error 466 ; 467 468 /* 469 * "arg_declaration" is separated from "declaration" because it 470 * needs other error handling. 471 */ 472 473 arg_declaration: 474 declmods deftyp T_SEMI { 475 /* empty declaration */ 476 warning(2); 477 } 478 | declmods deftyp notype_init_decls T_SEMI 479 | declspecs deftyp T_SEMI { 480 if (!dcs->d_nedecl) { 481 /* empty declaration */ 482 warning(2); 483 } else { 484 /* '%s' declared in argument declaration list */ 485 warning(3, type_name(dcs->d_type)); 486 } 487 } 488 | declspecs deftyp type_init_decls T_SEMI { 489 if (dcs->d_nedecl) { 490 /* '%s' declared in argument declaration list */ 491 warning(3, type_name(dcs->d_type)); 492 } 493 } 494 | declmods error 495 | declspecs error 496 ; 497 498 declaration: 499 declmods deftyp T_SEMI { 500 if (dcs->d_scl == TYPEDEF) { 501 /* typedef declares no type name */ 502 warning(72); 503 } else { 504 /* empty declaration */ 505 warning(2); 506 } 507 } 508 | declmods deftyp notype_init_decls T_SEMI 509 | declspecs deftyp T_SEMI { 510 if (dcs->d_scl == TYPEDEF) { 511 /* typedef declares no type name */ 512 warning(72); 513 } else if (!dcs->d_nedecl) { 514 /* empty declaration */ 515 warning(2); 516 } 517 } 518 | declspecs deftyp type_init_decls T_SEMI 519 | error T_SEMI 520 ; 521 522 type_attribute_format_type: 523 T_AT_FORMAT_GNU_PRINTF 524 | T_AT_FORMAT_PRINTF 525 | T_AT_FORMAT_SCANF 526 | T_AT_FORMAT_STRFMON 527 | T_AT_FORMAT_STRFTIME 528 | T_AT_FORMAT_SYSLOG 529 ; 530 531 type_attribute_bounded_type: 532 T_AT_MINBYTES 533 | T_AT_STRING 534 | T_AT_BUFFER 535 ; 536 537 538 type_attribute_spec: 539 /* empty */ 540 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 541 | T_AT_DEPRECATED 542 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 543 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 544 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 545 | T_AT_BOUNDED T_LPAREN type_attribute_bounded_type 546 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 547 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 548 | T_AT_SENTINEL 549 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 550 | T_AT_NONNULL T_LPAREN constant_expr T_RPAREN 551 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 552 | T_AT_ALIAS T_LPAREN string T_RPAREN 553 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 554 | T_AT_PCS T_LPAREN string T_RPAREN 555 | T_AT_SECTION T_LPAREN string T_RPAREN 556 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 557 | T_AT_ALIGNED 558 | T_AT_CONSTRUCTOR 559 | T_AT_DESTRUCTOR 560 | T_AT_MALLOC 561 | T_AT_MAY_ALIAS 562 | T_AT_NO_INSTRUMENT_FUNCTION 563 | T_AT_NOINLINE 564 | T_AT_NORETURN 565 | T_AT_NOTHROW 566 | T_AT_COLD 567 | T_AT_RETURNS_TWICE 568 | T_AT_PACKED { 569 addpacked(); 570 } 571 | T_AT_PURE 572 | T_AT_TUNION 573 | T_AT_GNU_INLINE 574 | T_AT_ALWAYS_INLINE 575 | T_AT_FORMAT T_LPAREN type_attribute_format_type T_COMMA 576 constant_expr T_COMMA constant_expr T_RPAREN 577 | T_AT_USED { 578 add_attr_used(); 579 } 580 | T_AT_UNUSED { 581 add_attr_used(); 582 } 583 | T_AT_WARN_UNUSED_RESULT 584 | T_AT_WEAK 585 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 586 | T_QUAL { 587 if ($1 != CONST) 588 yyerror("Bad attribute"); 589 } 590 ; 591 592 type_attribute_spec_list: 593 type_attribute_spec 594 | type_attribute_spec_list T_COMMA type_attribute_spec 595 ; 596 597 type_attribute: 598 T_ATTRIBUTE T_LPAREN T_LPAREN { 599 attron = true; 600 } type_attribute_spec_list { 601 attron = false; 602 } T_RPAREN T_RPAREN 603 | T_PACKED { 604 addpacked(); 605 } 606 | T_NORETURN { 607 } 608 ; 609 610 type_attribute_list: 611 type_attribute 612 | type_attribute_list type_attribute 613 ; 614 615 clrtyp: 616 /* empty */ { 617 clrtyp(); 618 } 619 ; 620 621 deftyp: 622 /* empty */ { 623 deftyp(); 624 } 625 ; 626 627 declspecs: 628 clrtyp_typespec { 629 add_type($1); 630 } 631 | declmods typespec { 632 add_type($2); 633 } 634 | type_attribute declspecs 635 | declspecs declmod 636 | declspecs notype_typespec { 637 add_type($2); 638 } 639 ; 640 641 declmods: 642 clrtyp T_QUAL { 643 add_qualifier($2); 644 } 645 | clrtyp T_SCLASS { 646 add_storage_class($2); 647 } 648 | declmods declmod 649 ; 650 651 declmod: 652 T_QUAL { 653 add_qualifier($1); 654 } 655 | T_SCLASS { 656 add_storage_class($1); 657 } 658 | type_attribute_list 659 ; 660 661 clrtyp_typespec: 662 clrtyp notype_typespec { 663 $$ = $2; 664 } 665 | T_TYPENAME clrtyp { 666 $$ = getsym($1)->s_type; 667 } 668 ; 669 670 typespec: 671 notype_typespec { 672 $$ = $1; 673 } 674 | T_TYPENAME { 675 $$ = getsym($1)->s_type; 676 } 677 ; 678 679 notype_typespec: 680 T_TYPE { 681 $$ = gettyp($1); 682 } 683 | T_TYPEOF term { 684 $$ = $2->tn_type; 685 } 686 | struct_spec { 687 popdecl(); 688 $$ = $1; 689 } 690 | enum_spec { 691 popdecl(); 692 $$ = $1; 693 } 694 ; 695 696 struct_spec: 697 struct struct_tag { 698 /* 699 * STDC requires that "struct a;" always introduces 700 * a new tag if "a" is not declared at current level 701 * 702 * yychar is valid because otherwise the parser would not 703 * have been able to decide if it must shift or reduce 704 */ 705 $$ = mktag($2, $1, false, yychar == T_SEMI); 706 } 707 | struct struct_tag { 708 dcs->d_tagtyp = mktag($2, $1, true, false); 709 } struct_declaration { 710 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 711 } 712 | struct { 713 dcs->d_tagtyp = mktag(NULL, $1, true, false); 714 } struct_declaration { 715 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 716 } 717 | struct error { 718 symtyp = FVFT; 719 $$ = gettyp(INT); 720 } 721 ; 722 723 struct: 724 struct type_attribute 725 | T_STRUCT_OR_UNION { 726 symtyp = FTAG; 727 pushdecl($1 == STRUCT ? MOS : MOU); 728 dcs->d_offset = 0; 729 dcs->d_stralign = CHAR_SIZE; 730 $$ = $1; 731 } 732 ; 733 734 struct_tag: 735 identifier { 736 $$ = getsym($1); 737 } 738 ; 739 740 struct_declaration: 741 struct_decl_lbrace member_declaration_list_with_rbrace { 742 $$ = $2; 743 } 744 ; 745 746 struct_decl_lbrace: 747 T_LBRACE { 748 symtyp = FVFT; 749 } 750 ; 751 752 member_declaration_list_with_rbrace: 753 member_declaration_list T_SEMI T_RBRACE { 754 $$ = $1; 755 } 756 | member_declaration_list T_RBRACE { 757 if (sflag) { 758 /* syntax req. ';' after last struct/union member */ 759 error(66); 760 } else { 761 /* syntax req. ';' after last struct/union member */ 762 warning(66); 763 } 764 $$ = $1; 765 } 766 | T_RBRACE { 767 $$ = NULL; 768 } 769 ; 770 771 opt_type_attribute: 772 /* empty */ 773 | type_attribute 774 ; 775 776 member_declaration_list: 777 member_declaration { 778 $$ = $1; 779 } 780 | member_declaration_list T_SEMI member_declaration { 781 $$ = lnklst($1, $3); 782 } 783 ; 784 785 member_declaration: 786 noclass_declmods deftyp { 787 /* too late, i know, but getsym() compensates it */ 788 symtyp = FMEMBER; 789 } notype_member_decls opt_type_attribute { 790 symtyp = FVFT; 791 $$ = $4; 792 } 793 | noclass_declspecs deftyp { 794 symtyp = FMEMBER; 795 } type_member_decls opt_type_attribute { 796 symtyp = FVFT; 797 $$ = $4; 798 } 799 | noclass_declmods deftyp opt_type_attribute { 800 symtyp = FVFT; 801 /* struct or union member must be named */ 802 if (!Sflag) 803 /* anonymous struct/union members is a C9X feature */ 804 warning(49); 805 /* add all the members of the anonymous struct/union */ 806 $$ = dcs->d_type->t_str->sou_first_member; 807 anonymize($$); 808 } 809 | noclass_declspecs deftyp opt_type_attribute { 810 symtyp = FVFT; 811 /* struct or union member must be named */ 812 if (!Sflag) 813 /* anonymous struct/union members is a C9X feature */ 814 warning(49); 815 $$ = dcs->d_type->t_str->sou_first_member; 816 /* add all the members of the anonymous struct/union */ 817 anonymize($$); 818 } 819 | error { 820 symtyp = FVFT; 821 $$ = NULL; 822 } 823 ; 824 825 noclass_declspecs: 826 clrtyp_typespec { 827 add_type($1); 828 } 829 | type_attribute noclass_declspecs 830 | noclass_declmods typespec { 831 add_type($2); 832 } 833 | noclass_declspecs T_QUAL { 834 add_qualifier($2); 835 } 836 | noclass_declspecs notype_typespec { 837 add_type($2); 838 } 839 | noclass_declspecs type_attribute 840 ; 841 842 noclass_declmods: 843 clrtyp T_QUAL { 844 add_qualifier($2); 845 } 846 | noclass_declmods T_QUAL { 847 add_qualifier($2); 848 } 849 ; 850 851 notype_member_decls: 852 notype_member_decl { 853 $$ = declarator_1_struct_union($1); 854 } 855 | notype_member_decls { 856 symtyp = FMEMBER; 857 } T_COMMA type_member_decl { 858 $$ = lnklst($1, declarator_1_struct_union($4)); 859 } 860 ; 861 862 type_member_decls: 863 type_member_decl { 864 $$ = declarator_1_struct_union($1); 865 } 866 | type_member_decls { 867 symtyp = FMEMBER; 868 } T_COMMA type_member_decl { 869 $$ = lnklst($1, declarator_1_struct_union($4)); 870 } 871 ; 872 873 notype_member_decl: 874 notype_decl { 875 $$ = $1; 876 } 877 | notype_decl T_COLON constant_expr { /* C99 6.7.2.1 */ 878 $$ = bitfield($1, to_int_constant($3, true)); 879 } 880 | { 881 symtyp = FVFT; 882 } T_COLON constant_expr { /* C99 6.7.2.1 */ 883 $$ = bitfield(NULL, to_int_constant($3, true)); 884 } 885 ; 886 887 type_member_decl: 888 type_decl { 889 $$ = $1; 890 } 891 | type_decl T_COLON constant_expr { 892 $$ = bitfield($1, to_int_constant($3, true)); 893 } 894 | { 895 symtyp = FVFT; 896 } T_COLON constant_expr { 897 $$ = bitfield(NULL, to_int_constant($3, true)); 898 } 899 ; 900 901 enum_spec: 902 enum enum_tag { 903 $$ = mktag($2, ENUM, false, false); 904 } 905 | enum enum_tag { 906 dcs->d_tagtyp = mktag($2, ENUM, true, false); 907 } enum_declaration { 908 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 909 } 910 | enum { 911 dcs->d_tagtyp = mktag(NULL, ENUM, true, false); 912 } enum_declaration { 913 $$ = complete_tag_enum(dcs->d_tagtyp, $3); 914 } 915 | enum error { 916 symtyp = FVFT; 917 $$ = gettyp(INT); 918 } 919 ; 920 921 enum: 922 T_ENUM { 923 symtyp = FTAG; 924 pushdecl(CTCONST); 925 } 926 ; 927 928 enum_tag: 929 identifier { 930 $$ = getsym($1); 931 } 932 ; 933 934 enum_declaration: 935 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 936 $$ = $2; 937 } 938 ; 939 940 enum_decl_lbrace: 941 T_LBRACE { 942 symtyp = FVFT; 943 enumval = 0; 944 } 945 ; 946 947 enums_with_opt_comma: 948 enums { 949 $$ = $1; 950 } 951 | enums T_COMMA { 952 if (sflag) { 953 /* trailing ',' prohibited in enum declaration */ 954 error(54); 955 } else { 956 /* trailing ',' prohibited in enum declaration */ 957 c99ism(54); 958 } 959 $$ = $1; 960 } 961 ; 962 963 enums: 964 enumerator { 965 $$ = $1; 966 } 967 | enums T_COMMA enumerator { 968 $$ = lnklst($1, $3); 969 } 970 | error { 971 $$ = NULL; 972 } 973 ; 974 975 enumerator: 976 enumeration_constant { 977 $$ = enumeration_constant($1, enumval, true); 978 } 979 | enumeration_constant T_ASSIGN constant_expr { 980 $$ = enumeration_constant($1, to_int_constant($3, true), false); 981 } 982 ; 983 984 enumeration_constant: /* C99 6.4.4.3 */ 985 identifier { 986 $$ = getsym($1); 987 } 988 ; 989 990 991 notype_init_decls: 992 notype_init_decl 993 | notype_init_decls T_COMMA type_init_decl 994 ; 995 996 type_init_decls: 997 type_init_decl 998 | type_init_decls T_COMMA type_init_decl 999 ; 1000 1001 notype_init_decl: 1002 notype_decl opt_asm_or_symbolrename { 1003 cgram_declare($1, false, $2); 1004 check_size($1); 1005 } 1006 | notype_decl opt_asm_or_symbolrename { 1007 cgram_declare($1, true, $2); 1008 } T_ASSIGN outermost_initializer { 1009 check_size($1); 1010 } 1011 ; 1012 1013 type_init_decl: 1014 type_decl opt_asm_or_symbolrename { 1015 cgram_declare($1, false, $2); 1016 check_size($1); 1017 } 1018 | type_decl opt_asm_or_symbolrename { 1019 cgram_declare($1, true, $2); 1020 } T_ASSIGN outermost_initializer { 1021 check_size($1); 1022 } 1023 ; 1024 1025 notype_decl: 1026 notype_direct_decl { 1027 $$ = $1; 1028 } 1029 | pointer notype_direct_decl { 1030 $$ = add_pointer($2, $1); 1031 } 1032 ; 1033 1034 notype_direct_decl: 1035 T_NAME { 1036 $$ = declarator_name(getsym($1)); 1037 } 1038 | T_LPAREN type_decl T_RPAREN { 1039 $$ = $2; 1040 } 1041 | type_attribute notype_direct_decl { 1042 $$ = $2; 1043 } 1044 | notype_direct_decl T_LBRACK T_RBRACK { 1045 $$ = add_array($1, false, 0); 1046 } 1047 | notype_direct_decl T_LBRACK constant_expr T_RBRACK { 1048 $$ = add_array($1, true, to_int_constant($3, false)); 1049 } 1050 | notype_direct_decl param_list opt_asm_or_symbolrename { 1051 $$ = add_function(symbolrename($1, $3), $2); 1052 popdecl(); 1053 block_level--; 1054 } 1055 | notype_direct_decl type_attribute_list 1056 ; 1057 1058 type_decl: 1059 type_direct_decl { 1060 $$ = $1; 1061 } 1062 | pointer type_direct_decl { 1063 $$ = add_pointer($2, $1); 1064 } 1065 ; 1066 1067 type_direct_decl: 1068 identifier { 1069 $$ = declarator_name(getsym($1)); 1070 } 1071 | T_LPAREN type_decl T_RPAREN { 1072 $$ = $2; 1073 } 1074 | type_attribute type_direct_decl { 1075 $$ = $2; 1076 } 1077 | type_direct_decl T_LBRACK T_RBRACK { 1078 $$ = add_array($1, false, 0); 1079 } 1080 | type_direct_decl T_LBRACK constant_expr T_RBRACK { 1081 $$ = add_array($1, true, to_int_constant($3, false)); 1082 } 1083 | type_direct_decl param_list opt_asm_or_symbolrename { 1084 $$ = add_function(symbolrename($1, $3), $2); 1085 popdecl(); 1086 block_level--; 1087 } 1088 | type_direct_decl type_attribute_list 1089 ; 1090 1091 /* 1092 * param_decl and notype_param_decl exist to avoid a conflict in 1093 * argument lists. A typename enclosed in parens should always be 1094 * treated as a typename, not an argument. 1095 * "typedef int a; f(int (a));" is "typedef int a; f(int foo(a));" 1096 * not "typedef int a; f(int a);" 1097 */ 1098 param_decl: 1099 direct_param_decl { 1100 $$ = $1; 1101 } 1102 | pointer direct_param_decl { 1103 $$ = add_pointer($2, $1); 1104 } 1105 ; 1106 1107 direct_param_decl: 1108 identifier type_attribute_list { 1109 $$ = declarator_name(getsym($1)); 1110 } 1111 | identifier { 1112 $$ = declarator_name(getsym($1)); 1113 } 1114 | T_LPAREN notype_param_decl T_RPAREN { 1115 $$ = $2; 1116 } 1117 | direct_param_decl T_LBRACK T_RBRACK { 1118 $$ = add_array($1, false, 0); 1119 } 1120 | direct_param_decl T_LBRACK constant_expr T_RBRACK { 1121 $$ = add_array($1, true, to_int_constant($3, false)); 1122 } 1123 | direct_param_decl param_list opt_asm_or_symbolrename { 1124 $$ = add_function(symbolrename($1, $3), $2); 1125 popdecl(); 1126 block_level--; 1127 } 1128 ; 1129 1130 notype_param_decl: 1131 direct_notype_param_decl { 1132 $$ = $1; 1133 } 1134 | pointer direct_notype_param_decl { 1135 $$ = add_pointer($2, $1); 1136 } 1137 ; 1138 1139 direct_notype_param_decl: 1140 identifier { 1141 $$ = declarator_name(getsym($1)); 1142 } 1143 | T_LPAREN notype_param_decl T_RPAREN { 1144 $$ = $2; 1145 } 1146 | direct_notype_param_decl T_LBRACK T_RBRACK { 1147 $$ = add_array($1, false, 0); 1148 } 1149 | direct_notype_param_decl T_LBRACK constant_expr T_RBRACK { 1150 $$ = add_array($1, true, to_int_constant($3, false)); 1151 } 1152 | direct_notype_param_decl param_list opt_asm_or_symbolrename { 1153 $$ = add_function(symbolrename($1, $3), $2); 1154 popdecl(); 1155 block_level--; 1156 } 1157 ; 1158 1159 pointer: 1160 asterisk { 1161 $$ = $1; 1162 } 1163 | asterisk type_qualifier_list { 1164 $$ = merge_pointers_and_qualifiers($1, $2); 1165 } 1166 | asterisk pointer { 1167 $$ = merge_pointers_and_qualifiers($1, $2); 1168 } 1169 | asterisk type_qualifier_list pointer { 1170 $$ = merge_pointers_and_qualifiers($1, $2); 1171 $$ = merge_pointers_and_qualifiers($$, $3); 1172 } 1173 ; 1174 1175 asterisk: 1176 T_ASTERISK { 1177 $$ = xcalloc(1, sizeof (pqinf_t)); 1178 $$->p_pcnt = 1; 1179 } 1180 ; 1181 1182 type_qualifier_list: 1183 type_qualifier { 1184 $$ = $1; 1185 } 1186 | type_qualifier_list type_qualifier { 1187 $$ = merge_pointers_and_qualifiers($1, $2); 1188 } 1189 ; 1190 1191 type_qualifier: 1192 T_QUAL { 1193 $$ = xcalloc(1, sizeof (pqinf_t)); 1194 if ($1 == CONST) { 1195 $$->p_const = true; 1196 } else if ($1 == VOLATILE) { 1197 $$->p_volatile = true; 1198 } else { 1199 lint_assert($1 == RESTRICT || $1 == THREAD); 1200 } 1201 } 1202 ; 1203 1204 param_list: 1205 id_list_lparen identifier_list T_RPAREN { 1206 $$ = $2; 1207 } 1208 | abstract_decl_param_list { 1209 $$ = $1; 1210 } 1211 ; 1212 1213 id_list_lparen: 1214 T_LPAREN { 1215 block_level++; 1216 pushdecl(PROTO_ARG); 1217 } 1218 ; 1219 1220 identifier_list: 1221 T_NAME { 1222 $$ = old_style_function_name(getsym($1)); 1223 } 1224 | identifier_list T_COMMA T_NAME { 1225 $$ = lnklst($1, old_style_function_name(getsym($3))); 1226 } 1227 | identifier_list error { 1228 $$ = $1; 1229 } 1230 ; 1231 1232 abstract_decl_param_list: 1233 abstract_decl_lparen T_RPAREN { 1234 $$ = NULL; 1235 } 1236 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN { 1237 dcs->d_proto = true; 1238 $$ = $2; 1239 } 1240 | abstract_decl_lparen error T_RPAREN { 1241 $$ = NULL; 1242 } 1243 ; 1244 1245 abstract_decl_lparen: 1246 T_LPAREN { 1247 block_level++; 1248 pushdecl(PROTO_ARG); 1249 } 1250 ; 1251 1252 vararg_parameter_type_list: 1253 parameter_type_list { 1254 $$ = $1; 1255 } 1256 | parameter_type_list T_COMMA T_ELLIPSIS { 1257 dcs->d_vararg = true; 1258 $$ = $1; 1259 } 1260 | T_ELLIPSIS { 1261 if (sflag) { 1262 /* ANSI C requires formal parameter before '...' */ 1263 error(84); 1264 } else if (!tflag) { 1265 /* ANSI C requires formal parameter before '...' */ 1266 warning(84); 1267 } 1268 dcs->d_vararg = true; 1269 $$ = NULL; 1270 } 1271 ; 1272 1273 parameter_type_list: 1274 parameter_declaration { 1275 $$ = $1; 1276 } 1277 | parameter_type_list T_COMMA parameter_declaration { 1278 $$ = lnklst($1, $3); 1279 } 1280 ; 1281 1282 parameter_declaration: 1283 declmods deftyp { 1284 $$ = declare_argument(abstract_name(), false); 1285 } 1286 | declspecs deftyp { 1287 $$ = declare_argument(abstract_name(), false); 1288 } 1289 | declmods deftyp notype_param_decl { 1290 $$ = declare_argument($3, false); 1291 } 1292 /* 1293 * param_decl is needed because of following conflict: 1294 * "typedef int a; f(int (a));" could be parsed as 1295 * "function with argument a of type int", or 1296 * "function with an abstract argument of type function". 1297 * This grammar realizes the second case. 1298 */ 1299 | declspecs deftyp param_decl { 1300 $$ = declare_argument($3, false); 1301 } 1302 | declmods deftyp abstract_decl { 1303 $$ = declare_argument($3, false); 1304 } 1305 | declspecs deftyp abstract_decl { 1306 $$ = declare_argument($3, false); 1307 } 1308 ; 1309 1310 opt_asm_or_symbolrename: /* expect only one */ 1311 /* empty */ { 1312 $$ = NULL; 1313 } 1314 | T_ASM T_LPAREN T_STRING T_RPAREN { 1315 freeyyv(&$3, T_STRING); 1316 $$ = NULL; 1317 } 1318 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN { 1319 $$ = $3; 1320 } 1321 ; 1322 1323 outermost_initializer: 1324 { 1325 cgram_debug("begin initialization"); 1326 } initializer { 1327 cgram_debug("end initialization"); 1328 } 1329 ; 1330 1331 initializer: /* C99 6.7.8 "Initialization" */ 1332 expr %prec T_COMMA { 1333 init_using_expr($1); 1334 } 1335 | init_lbrace init_rbrace { 1336 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1337 } 1338 | init_lbrace initializer_list comma_opt init_rbrace 1339 | error 1340 ; 1341 1342 initializer_list: /* C99 6.7.8 "Initialization" */ 1343 initializer_list_item %prec T_COMMA 1344 | initializer_list T_COMMA initializer_list_item 1345 ; 1346 1347 initializer_list_item: 1348 designation initializer 1349 | initializer 1350 ; 1351 1352 range: 1353 constant_expr { 1354 $$.lo = to_int_constant($1, true); 1355 $$.hi = $$.lo; 1356 } 1357 | constant_expr T_ELLIPSIS constant_expr { 1358 $$.lo = to_int_constant($1, true); 1359 $$.hi = to_int_constant($3, true); 1360 /* initialization with '[a...b]' is a GNU extension */ 1361 gnuism(340); 1362 } 1363 ; 1364 1365 designator: /* C99 6.7.8 "Initialization" */ 1366 T_LBRACK range T_RBRACK { 1367 designator_push_subscript($2); 1368 if (!Sflag) 1369 /* array initializer with des.s is a C9X feature */ 1370 warning(321); 1371 } 1372 | point identifier { 1373 if (!Sflag) 1374 /* struct or union member name in initializer is ... */ 1375 warning(313); 1376 designator_push_name($2); 1377 } 1378 ; 1379 1380 designator_list: /* C99 6.7.8 "Initialization" */ 1381 designator 1382 | designator_list designator 1383 ; 1384 1385 designation: /* C99 6.7.8 "Initialization" */ 1386 designator_list T_ASSIGN 1387 | identifier T_COLON { 1388 /* GCC style struct or union member name in initializer */ 1389 gnuism(315); 1390 designator_push_name($1); 1391 } 1392 ; 1393 1394 init_lbrace: 1395 T_LBRACE { 1396 init_lbrace(); 1397 } 1398 ; 1399 1400 init_rbrace: 1401 T_RBRACE { 1402 init_rbrace(); 1403 } 1404 ; 1405 1406 type_name: 1407 { 1408 pushdecl(ABSTRACT); 1409 } abstract_declaration { 1410 popdecl(); 1411 $$ = $2->s_type; 1412 } 1413 ; 1414 1415 abstract_declaration: 1416 noclass_declmods deftyp { 1417 $$ = declare_1_abstract(abstract_name()); 1418 } 1419 | noclass_declspecs deftyp { 1420 $$ = declare_1_abstract(abstract_name()); 1421 } 1422 | noclass_declmods deftyp abstract_decl { 1423 $$ = declare_1_abstract($3); 1424 } 1425 | noclass_declspecs deftyp abstract_decl { 1426 $$ = declare_1_abstract($3); 1427 } 1428 ; 1429 1430 abstract_decl: 1431 pointer { 1432 $$ = add_pointer(abstract_name(), $1); 1433 } 1434 | direct_abstract_decl { 1435 $$ = $1; 1436 } 1437 | pointer direct_abstract_decl { 1438 $$ = add_pointer($2, $1); 1439 } 1440 | T_TYPEOF term { 1441 $$ = mktempsym($2->tn_type); 1442 } 1443 ; 1444 1445 direct_abstract_decl: 1446 T_LPAREN abstract_decl T_RPAREN { 1447 $$ = $2; 1448 } 1449 | T_LBRACK T_RBRACK { 1450 $$ = add_array(abstract_name(), false, 0); 1451 } 1452 | T_LBRACK constant_expr T_RBRACK { 1453 $$ = add_array(abstract_name(), true, to_int_constant($2, false)); 1454 } 1455 | type_attribute direct_abstract_decl { 1456 $$ = $2; 1457 } 1458 | direct_abstract_decl T_LBRACK T_RBRACK { 1459 $$ = add_array($1, false, 0); 1460 } 1461 | direct_abstract_decl T_LBRACK constant_expr T_RBRACK { 1462 $$ = add_array($1, true, to_int_constant($3, false)); 1463 } 1464 | abstract_decl_param_list opt_asm_or_symbolrename { 1465 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1466 popdecl(); 1467 block_level--; 1468 } 1469 | direct_abstract_decl abstract_decl_param_list opt_asm_or_symbolrename { 1470 $$ = add_function(symbolrename($1, $3), $2); 1471 popdecl(); 1472 block_level--; 1473 } 1474 | direct_abstract_decl type_attribute_list 1475 ; 1476 1477 non_expr_statement: 1478 labeled_statement 1479 | compound_statement 1480 | selection_statement 1481 | iteration_statement 1482 | jump_statement { 1483 ftflg = false; 1484 } 1485 | asm_statement 1486 1487 statement: /* C99 6.8 */ 1488 expr_statement 1489 | non_expr_statement 1490 ; 1491 1492 labeled_statement: /* C99 6.8.1 */ 1493 label statement 1494 ; 1495 1496 label: 1497 T_NAME T_COLON { 1498 symtyp = FLABEL; 1499 named_label(getsym($1)); 1500 } 1501 | T_CASE constant_expr T_COLON { 1502 case_label($2); 1503 ftflg = true; 1504 } 1505 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1506 /* XXX: We don't fill all cases */ 1507 case_label($2); 1508 ftflg = true; 1509 } 1510 | T_DEFAULT T_COLON { 1511 default_label(); 1512 ftflg = true; 1513 } 1514 ; 1515 1516 compound_statement: /* C99 6.8.2 */ 1517 compound_statement_lbrace compound_statement_rbrace 1518 | compound_statement_lbrace block_item_list compound_statement_rbrace 1519 ; 1520 1521 compound_statement_lbrace: 1522 T_LBRACE { 1523 block_level++; 1524 mem_block_level++; 1525 pushdecl(AUTO); 1526 } 1527 ; 1528 1529 compound_statement_rbrace: 1530 T_RBRACE { 1531 popdecl(); 1532 freeblk(); 1533 mem_block_level--; 1534 block_level--; 1535 ftflg = false; 1536 } 1537 ; 1538 1539 block_item_list: 1540 block_item 1541 | block_item_list block_item { 1542 if (!Sflag && $1 && !$2) 1543 /* declarations after statements is a C99 feature */ 1544 c99ism(327); 1545 } 1546 ; 1547 1548 block_item: 1549 statement { 1550 $$ = true; 1551 RESTORE_WARN_FLAGS(__FILE__, __LINE__); 1552 } 1553 | declaration { 1554 /*fprintf(stderr, "block_item.declaration: %d\n", $$);*/ 1555 $$ = false; 1556 RESTORE_WARN_FLAGS(__FILE__, __LINE__); 1557 } 1558 ; 1559 1560 expr_statement: 1561 expr T_SEMI { 1562 expr($1, false, false, false, false); 1563 ftflg = false; 1564 } 1565 | T_SEMI { 1566 ftflg = false; 1567 } 1568 ; 1569 1570 /* 1571 * The following two productions are used to implement 1572 * ({ [[decl-list] stmt-list] }). 1573 * XXX: This is not well tested. 1574 */ 1575 expr_statement_val: 1576 expr T_SEMI { 1577 /* XXX: We should really do that only on the last name */ 1578 if ($1->tn_op == NAME) 1579 $1->tn_sym->s_used = true; 1580 $$ = $1; 1581 expr($1, false, false, false, false); 1582 ftflg = false; 1583 } 1584 | non_expr_statement { 1585 $$ = getnode(); 1586 $$->tn_type = gettyp(VOID); 1587 } 1588 ; 1589 1590 expr_statement_list: 1591 expr_statement_val 1592 | expr_statement_list expr_statement_val { 1593 $$ = $2; 1594 } 1595 ; 1596 1597 selection_statement: /* C99 6.8.4 */ 1598 if_without_else { 1599 SAVE_WARN_FLAGS(__FILE__, __LINE__); 1600 if2(); 1601 if3(false); 1602 } 1603 | if_without_else T_ELSE { 1604 SAVE_WARN_FLAGS(__FILE__, __LINE__); 1605 if2(); 1606 } statement { 1607 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1608 if3(true); 1609 } 1610 | if_without_else T_ELSE error { 1611 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1612 if3(false); 1613 } 1614 | switch_expr statement { 1615 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1616 switch2(); 1617 } 1618 | switch_expr error { 1619 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1620 switch2(); 1621 } 1622 ; 1623 1624 if_without_else: 1625 if_expr statement 1626 | if_expr error 1627 ; 1628 1629 if_expr: 1630 T_IF T_LPAREN expr T_RPAREN { 1631 if1($3); 1632 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1633 } 1634 ; 1635 1636 switch_expr: 1637 T_SWITCH T_LPAREN expr T_RPAREN { 1638 switch1($3); 1639 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1640 } 1641 ; 1642 1643 association: 1644 type_name T_COLON expr 1645 | T_DEFAULT T_COLON expr 1646 ; 1647 1648 association_list: 1649 association 1650 | association_list T_COMMA association 1651 ; 1652 1653 generic_expr: 1654 T_GENERIC T_LPAREN expr T_COMMA association_list T_RPAREN { 1655 $$ = $3; 1656 } 1657 ; 1658 1659 do_statement: 1660 do statement { 1661 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1662 } 1663 ; 1664 1665 iteration_statement: /* C99 6.8.5 */ 1666 while_expr statement { 1667 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1668 while2(); 1669 } 1670 | while_expr error { 1671 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1672 while2(); 1673 } 1674 | do_statement do_while_expr { 1675 do2($2); 1676 ftflg = false; 1677 } 1678 | do error { 1679 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1680 do2(NULL); 1681 } 1682 | for_exprs statement { 1683 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1684 for2(); 1685 popdecl(); 1686 block_level--; 1687 } 1688 | for_exprs error { 1689 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1690 for2(); 1691 popdecl(); 1692 block_level--; 1693 } 1694 ; 1695 1696 while_expr: 1697 T_WHILE T_LPAREN expr T_RPAREN { 1698 while1($3); 1699 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1700 } 1701 ; 1702 1703 do: 1704 T_DO { 1705 do1(); 1706 } 1707 ; 1708 1709 do_while_expr: 1710 T_WHILE T_LPAREN expr T_RPAREN T_SEMI { 1711 $$ = $3; 1712 } 1713 ; 1714 1715 for_start: 1716 T_FOR T_LPAREN { 1717 pushdecl(AUTO); 1718 block_level++; 1719 } 1720 ; 1721 for_exprs: 1722 for_start declspecs deftyp notype_init_decls T_SEMI opt_expr 1723 T_SEMI opt_expr T_RPAREN { 1724 /* variable declaration in for loop */ 1725 c99ism(325); 1726 for1(NULL, $6, $8); 1727 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1728 } 1729 | for_start opt_expr T_SEMI opt_expr T_SEMI opt_expr T_RPAREN { 1730 for1($2, $4, $6); 1731 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1732 } 1733 ; 1734 1735 opt_expr: 1736 /* empty */ { 1737 $$ = NULL; 1738 } 1739 | expr { 1740 $$ = $1; 1741 } 1742 ; 1743 1744 jump_statement: /* C99 6.8.6 */ 1745 goto identifier T_SEMI { 1746 dogoto(getsym($2)); 1747 } 1748 | goto error T_SEMI { 1749 symtyp = FVFT; 1750 } 1751 | T_CONTINUE T_SEMI { 1752 docont(); 1753 } 1754 | T_BREAK T_SEMI { 1755 dobreak(); 1756 } 1757 | T_RETURN T_SEMI { 1758 doreturn(NULL); 1759 } 1760 | T_RETURN expr T_SEMI { 1761 doreturn($2); 1762 } 1763 ; 1764 1765 goto: 1766 T_GOTO { 1767 symtyp = FLABEL; 1768 } 1769 ; 1770 1771 asm_statement: 1772 T_ASM T_LPAREN read_until_rparen T_SEMI { 1773 setasm(); 1774 } 1775 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1776 setasm(); 1777 } 1778 | T_ASM error 1779 ; 1780 1781 read_until_rparen: 1782 /* empty */ { 1783 ignore_up_to_rparen(); 1784 } 1785 ; 1786 1787 declaration_list: 1788 declaration { 1789 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1790 } 1791 | declaration_list declaration { 1792 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1793 } 1794 ; 1795 1796 constant_expr: /* C99 6.6 */ 1797 expr %prec T_ASSIGN { 1798 $$ = $1; 1799 } 1800 ; 1801 1802 expr: 1803 expr T_ASTERISK expr { 1804 $$ = build(MULT, $1, $3); 1805 } 1806 | expr T_MULTIPLICATIVE expr { 1807 $$ = build($2, $1, $3); 1808 } 1809 | expr T_ADDITIVE expr { 1810 $$ = build($2, $1, $3); 1811 } 1812 | expr T_SHIFT expr { 1813 $$ = build($2, $1, $3); 1814 } 1815 | expr T_RELATIONAL expr { 1816 $$ = build($2, $1, $3); 1817 } 1818 | expr T_EQUALITY expr { 1819 $$ = build($2, $1, $3); 1820 } 1821 | expr T_AMPER expr { 1822 $$ = build(BITAND, $1, $3); 1823 } 1824 | expr T_XOR expr { 1825 $$ = build(BITXOR, $1, $3); 1826 } 1827 | expr T_BITOR expr { 1828 $$ = build(BITOR, $1, $3); 1829 } 1830 | expr T_LOGAND expr { 1831 $$ = build(LOGAND, $1, $3); 1832 } 1833 | expr T_LOGOR expr { 1834 $$ = build(LOGOR, $1, $3); 1835 } 1836 | expr T_QUEST expr T_COLON expr { 1837 $$ = build(QUEST, $1, build(COLON, $3, $5)); 1838 } 1839 | expr T_ASSIGN expr { 1840 $$ = build(ASSIGN, $1, $3); 1841 } 1842 | expr T_OPASSIGN expr { 1843 $$ = build($2, $1, $3); 1844 } 1845 | expr T_COMMA expr { 1846 $$ = build(COMMA, $1, $3); 1847 } 1848 | term { 1849 $$ = $1; 1850 } 1851 | generic_expr { 1852 $$ = $1; 1853 } 1854 ; 1855 1856 term: 1857 T_NAME { 1858 /* XXX really necessary? */ 1859 if (yychar < 0) 1860 yychar = yylex(); 1861 $$ = new_name_node(getsym($1), yychar); 1862 } 1863 | string { 1864 $$ = new_string_node($1); 1865 } 1866 | T_CON { 1867 $$ = new_constant_node(gettyp($1->v_tspec), $1); 1868 } 1869 | T_LPAREN expr T_RPAREN { 1870 if ($2 != NULL) 1871 $2->tn_parenthesized = true; 1872 $$ = $2; 1873 } 1874 | T_LPAREN compound_statement_lbrace declaration_list 1875 expr_statement_list { 1876 block_level--; 1877 mem_block_level--; 1878 initsym = mktempsym(duptyp($4->tn_type)); 1879 mem_block_level++; 1880 block_level++; 1881 /* ({ }) is a GCC extension */ 1882 gnuism(320); 1883 } compound_statement_rbrace T_RPAREN { 1884 $$ = new_name_node(initsym, 0); 1885 } 1886 | T_LPAREN compound_statement_lbrace expr_statement_list { 1887 block_level--; 1888 mem_block_level--; 1889 initsym = mktempsym($3->tn_type); 1890 mem_block_level++; 1891 block_level++; 1892 /* ({ }) is a GCC extension */ 1893 gnuism(320); 1894 } compound_statement_rbrace T_RPAREN { 1895 $$ = new_name_node(initsym, 0); 1896 } 1897 | term T_INCDEC { 1898 $$ = build($2 == INC ? INCAFT : DECAFT, $1, NULL); 1899 } 1900 | T_INCDEC term { 1901 $$ = build($1 == INC ? INCBEF : DECBEF, $2, NULL); 1902 } 1903 | T_ASTERISK term { 1904 $$ = build(INDIR, $2, NULL); 1905 } 1906 | T_AMPER term { 1907 $$ = build(ADDR, $2, NULL); 1908 } 1909 | T_UNARY term { 1910 $$ = build($1, $2, NULL); 1911 } 1912 | T_ADDITIVE term { 1913 if (tflag && $1 == PLUS) { 1914 /* unary + is illegal in traditional C */ 1915 warning(100); 1916 } 1917 $$ = build($1 == PLUS ? UPLUS : UMINUS, $2, NULL); 1918 } 1919 | term T_LBRACK expr T_RBRACK { 1920 $$ = build(INDIR, build(PLUS, $1, $3), NULL); 1921 } 1922 | term T_LPAREN T_RPAREN { 1923 $$ = new_function_call_node($1, NULL); 1924 } 1925 | term T_LPAREN func_arg_list T_RPAREN { 1926 $$ = new_function_call_node($1, $3); 1927 } 1928 | term point_or_arrow T_NAME { 1929 if ($1 != NULL) { 1930 sym_t *msym; 1931 /* 1932 * XXX struct_or_union_member should be integrated 1933 * in build() 1934 */ 1935 if ($2 == ARROW) { 1936 /* 1937 * must do this before struct_or_union_member 1938 * is called 1939 */ 1940 $1 = cconv($1); 1941 } 1942 msym = struct_or_union_member($1, $2, getsym($3)); 1943 $$ = build($2, $1, new_name_node(msym, 0)); 1944 } else { 1945 $$ = NULL; 1946 } 1947 } 1948 | T_REAL term { 1949 $$ = build(REAL, $2, NULL); 1950 } 1951 | T_IMAG term { 1952 $$ = build(IMAG, $2, NULL); 1953 } 1954 | T_EXTENSION term { 1955 $$ = $2; 1956 } 1957 | T_REAL T_LPAREN term T_RPAREN { 1958 $$ = build(REAL, $3, NULL); 1959 } 1960 | T_IMAG T_LPAREN term T_RPAREN { 1961 $$ = build(IMAG, $3, NULL); 1962 } 1963 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN 1964 %prec T_BUILTIN_OFFSETOF { 1965 symtyp = FMEMBER; 1966 $$ = build_offsetof($3, getsym($5)); 1967 } 1968 | T_SIZEOF term %prec T_SIZEOF { 1969 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 1970 if ($$ != NULL) 1971 check_expr_misc($2, false, false, false, false, false, true); 1972 } 1973 | T_SIZEOF T_LPAREN type_name T_RPAREN %prec T_SIZEOF { 1974 $$ = build_sizeof($3); 1975 } 1976 | T_ALIGNOF T_LPAREN type_name T_RPAREN %prec T_ALIGNOF { 1977 $$ = build_alignof($3); 1978 } 1979 | T_LPAREN type_name T_RPAREN term %prec T_UNARY { 1980 $$ = cast($4, $2); 1981 } 1982 | T_LPAREN type_name T_RPAREN %prec T_UNARY { 1983 sym_t *tmp = mktempsym($2); 1984 cgram_declare(tmp, true, NULL); 1985 } init_lbrace initializer_list comma_opt init_rbrace { 1986 if (!Sflag) 1987 /* compound literals are a C9X/GCC extension */ 1988 gnuism(319); 1989 $$ = new_name_node(initsym, 0); 1990 } 1991 ; 1992 1993 string: 1994 T_STRING { 1995 $$ = $1; 1996 } 1997 | T_STRING string2 { 1998 $$ = cat_strings($1, $2); 1999 } 2000 ; 2001 2002 string2: 2003 T_STRING { 2004 if (tflag) { 2005 /* concatenated strings are illegal in traditional C */ 2006 warning(219); 2007 } 2008 $$ = $1; 2009 } 2010 | string2 T_STRING { 2011 $$ = cat_strings($1, $2); 2012 } 2013 ; 2014 2015 func_arg_list: 2016 expr %prec T_COMMA { 2017 $$ = new_function_argument_node(NULL, $1); 2018 } 2019 | func_arg_list T_COMMA expr { 2020 $$ = new_function_argument_node($1, $3); 2021 } 2022 ; 2023 2024 point_or_arrow: 2025 T_MEMBACC { 2026 symtyp = FMEMBER; 2027 $$ = $1; 2028 } 2029 ; 2030 2031 point: 2032 T_MEMBACC { 2033 if ($1 != POINT) { 2034 /* syntax error '%s' */ 2035 error(249, yytext); 2036 } 2037 } 2038 ; 2039 2040 identifier: /* C99 6.4.2.1 */ 2041 T_NAME { 2042 $$ = $1; 2043 cgram_debug("name '%s'", $$->sb_name); 2044 } 2045 | T_TYPENAME { 2046 $$ = $1; 2047 cgram_debug("typename '%s'", $$->sb_name); 2048 } 2049 ; 2050 2051 comma_opt: 2052 T_COMMA 2053 | /* empty */ 2054 ; 2055 %% 2056 2057 /* ARGSUSED */ 2058 int 2059 yyerror(const char *msg) 2060 { 2061 /* syntax error '%s' */ 2062 error(249, yytext); 2063 if (++sytxerr >= 5) 2064 norecover(); 2065 return 0; 2066 } 2067 2068 static void 2069 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2070 { 2071 declare(decl, initflg, renaming); 2072 if (renaming != NULL) 2073 freeyyv(&renaming, T_NAME); 2074 } 2075 2076 /* 2077 * Discard all input tokens up to and including the next 2078 * unmatched right paren 2079 */ 2080 static void 2081 ignore_up_to_rparen(void) 2082 { 2083 int level; 2084 2085 if (yychar < 0) 2086 yychar = yylex(); 2087 freeyyv(&yylval, yychar); 2088 2089 level = 1; 2090 while (yychar != T_RPAREN || --level > 0) { 2091 if (yychar == T_LPAREN) { 2092 level++; 2093 } else if (yychar <= 0) { 2094 break; 2095 } 2096 freeyyv(&yylval, yychar = yylex()); 2097 } 2098 2099 yyclearin; 2100 } 2101 2102 static sym_t * 2103 symbolrename(sym_t *s, sbuf_t *sb) 2104 { 2105 if (sb) 2106 s->s_rename = sb->sb_name; 2107 return s; 2108 } 2109
Indexes created Fri Oct 03 02:09:57 GMT 2025