cgram.y revision 1.178
1 %{ 2 /* $NetBSD: cgram.y,v 1.178 2021/03/19 07:54:13 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 1.178 2021/03/19 07:54:13 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 138 123 124 %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 }; 139 140 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPAREN T_RPAREN 141 %token <y_op> T_MEMBACC 142 %token <y_op> T_UNARY 143 %token <y_op> T_INCDEC 144 %token T_SIZEOF 145 %token T_BUILTIN_OFFSETOF 146 %token T_TYPEOF 147 %token T_EXTENSION 148 %token T_ALIGNOF 149 %token <y_op> T_ASTERISK 150 %token <y_op> T_MULTIPLICATIVE 151 %token <y_op> T_ADDITIVE 152 %token <y_op> T_SHIFT 153 %token <y_op> T_RELATIONAL 154 %token <y_op> T_EQUALITY 155 %token <y_op> T_AMPER 156 %token <y_op> T_XOR 157 %token <y_op> T_BITOR 158 %token <y_op> T_LOGAND 159 %token <y_op> T_LOGOR 160 %token T_QUEST 161 %token T_COLON 162 %token <y_op> T_ASSIGN 163 %token <y_op> T_OPASSIGN 164 %token T_COMMA 165 %token T_SEMI 166 %token T_ELLIPSIS 167 %token T_REAL 168 %token T_IMAG 169 %token T_GENERIC 170 %token T_NORETURN 171 172 /* storage classes (extern, static, auto, register and typedef) */ 173 %token <y_scl> T_SCLASS 174 175 /* 176 * predefined type keywords (char, int, short, long, unsigned, signed, 177 * float, double, void); see T_TYPENAME 178 */ 179 %token <y_tspec> T_TYPE 180 181 /* qualifiers (const, volatile, restrict, _Thread_local) */ 182 %token <y_tqual> T_QUAL 183 184 /* struct or union */ 185 %token <y_tspec> T_STRUCT_OR_UNION 186 187 /* remaining keywords */ 188 %token T_ASM 189 %token T_BREAK 190 %token T_CASE 191 %token T_CONTINUE 192 %token T_DEFAULT 193 %token T_DO 194 %token T_ELSE 195 %token T_ENUM 196 %token T_FOR 197 %token T_GOTO 198 %token T_IF 199 %token T_PACKED 200 %token T_RETURN 201 %token T_SWITCH 202 %token T_SYMBOLRENAME 203 %token T_WHILE 204 /* Type Attributes */ 205 %token <y_type> T_ATTRIBUTE 206 %token <y_type> T_AT_ALIAS 207 %token <y_type> T_AT_ALIGNED 208 %token <y_type> T_AT_ALLOC_SIZE 209 %token <y_type> T_AT_ALWAYS_INLINE 210 %token <y_type> T_AT_BOUNDED 211 %token <y_type> T_AT_BUFFER 212 %token <y_type> T_AT_COLD 213 %token <y_type> T_AT_CONSTRUCTOR 214 %token <y_type> T_AT_DEPRECATED 215 %token <y_type> T_AT_DESTRUCTOR 216 %token <y_type> T_AT_FORMAT 217 %token <y_type> T_AT_FORMAT_ARG 218 %token <y_type> T_AT_FORMAT_GNU_PRINTF 219 %token <y_type> T_AT_FORMAT_PRINTF 220 %token <y_type> T_AT_FORMAT_SCANF 221 %token <y_type> T_AT_FORMAT_STRFMON 222 %token <y_type> T_AT_FORMAT_STRFTIME 223 %token <y_type> T_AT_FORMAT_SYSLOG 224 %token <y_type> T_AT_GNU_INLINE 225 %token <y_type> T_AT_MALLOC 226 %token <y_type> T_AT_MAY_ALIAS 227 %token <y_type> T_AT_MINBYTES 228 %token <y_type> T_AT_MODE 229 %token <y_type> T_AT_NOINLINE 230 %token <y_type> T_AT_NONNULL 231 %token <y_type> T_AT_NORETURN 232 %token <y_type> T_AT_NOTHROW 233 %token <y_type> T_AT_NO_INSTRUMENT_FUNCTION 234 %token <y_type> T_AT_OPTIMIZE 235 %token <y_type> T_AT_PACKED 236 %token <y_type> T_AT_PCS 237 %token <y_type> T_AT_PURE 238 %token <y_type> T_AT_RETURNS_TWICE 239 %token <y_type> T_AT_SECTION 240 %token <y_type> T_AT_SENTINEL 241 %token <y_type> T_AT_STRING 242 %token <y_type> T_AT_TLS_MODEL 243 %token <y_type> T_AT_TUNION 244 %token <y_type> T_AT_UNUSED 245 %token <y_type> T_AT_USED 246 %token <y_type> T_AT_VISIBILITY 247 %token <y_type> T_AT_WARN_UNUSED_RESULT 248 %token <y_type> T_AT_WEAK 249 250 %left T_COMMA 251 %right T_ASSIGN T_OPASSIGN 252 %right T_QUEST T_COLON 253 %left T_LOGOR 254 %left T_LOGAND 255 %left T_BITOR 256 %left T_XOR 257 %left T_AMPER 258 %left T_EQUALITY 259 %left T_RELATIONAL 260 %left T_SHIFT 261 %left T_ADDITIVE 262 %left T_ASTERISK T_MULTIPLICATIVE 263 %right T_UNARY T_INCDEC T_SIZEOF T_BUILTIN_OFFSETOF T_ALIGNOF T_REAL T_IMAG 264 %left T_LPAREN T_LBRACK T_MEMBACC 265 266 %token <y_sb> T_NAME 267 %token <y_sb> T_TYPENAME 268 %token <y_val> T_CON 269 %token <y_string> T_STRING 270 271 %type <y_sym> func_decl 272 %type <y_sym> notype_decl 273 %type <y_sym> type_decl 274 %type <y_type> typespec 275 %type <y_type> clrtyp_typespec 276 %type <y_type> notype_typespec 277 %type <y_type> struct_spec 278 %type <y_type> enum_spec 279 %type <y_type> type_attribute 280 %type <y_sym> struct_tag 281 %type <y_sym> enum_tag 282 %type <y_tspec> struct 283 %type <y_sym> struct_declaration 284 %type <y_sb> identifier 285 %type <y_sym> member_declaration_list_with_rbrace 286 %type <y_sym> member_declaration_list 287 %type <y_sym> member_declaration 288 %type <y_sym> notype_member_decls 289 %type <y_sym> type_member_decls 290 %type <y_sym> notype_member_decl 291 %type <y_sym> type_member_decl 292 %type <y_tnode> constant_expr 293 %type <y_sym> enum_declaration 294 %type <y_sym> enums_with_opt_comma 295 %type <y_sym> enums 296 %type <y_sym> enumerator 297 %type <y_sym> enumeration_constant 298 %type <y_sym> notype_direct_decl 299 %type <y_sym> type_direct_decl 300 %type <y_pqinf> pointer 301 %type <y_pqinf> asterisk 302 %type <y_sym> param_decl 303 %type <y_sym> param_list 304 %type <y_sym> abstract_decl_param_list 305 %type <y_sym> direct_param_decl 306 %type <y_sym> notype_param_decl 307 %type <y_sym> direct_notype_param_decl 308 %type <y_pqinf> type_qualifier_list 309 %type <y_pqinf> type_qualifier 310 %type <y_sym> identifier_list 311 %type <y_sym> abstract_decl 312 %type <y_sym> direct_abstract_decl 313 %type <y_sym> vararg_parameter_type_list 314 %type <y_sym> parameter_type_list 315 %type <y_sym> parameter_declaration 316 %type <y_tnode> expr 317 %type <y_tnode> expr_statement_val 318 %type <y_tnode> expr_statement_list 319 %type <y_tnode> term 320 %type <y_tnode> generic_expr 321 %type <y_tnode> func_arg_list 322 %type <y_op> point_or_arrow 323 %type <y_type> type_name 324 %type <y_sym> abstract_declaration 325 %type <y_tnode> do_while_expr 326 %type <y_tnode> opt_expr 327 %type <y_string> string 328 %type <y_string> string2 329 %type <y_sb> opt_asm_or_symbolrename 330 %type <y_range> range 331 332 333 %% 334 335 program: 336 /* empty */ { 337 if (sflag) { 338 /* empty translation unit */ 339 error(272); 340 } else if (!tflag) { 341 /* empty translation unit */ 342 warning(272); 343 } 344 } 345 | translation_unit 346 ; 347 348 translation_unit: /* C99 6.9 */ 349 external_declaration 350 | translation_unit external_declaration 351 ; 352 353 external_declaration: /* C99 6.9 */ 354 asm_statement 355 | function_definition { 356 global_clean_up_decl(0); 357 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 358 } 359 | data_def { 360 global_clean_up_decl(0); 361 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 362 } 363 ; 364 365 data_def: 366 T_SEMI { 367 if (sflag) { 368 /* empty declaration */ 369 error(0); 370 } else if (!tflag) { 371 /* empty declaration */ 372 warning(0); 373 } 374 } 375 | clrtyp deftyp notype_init_decls T_SEMI { 376 if (sflag) { 377 /* old style declaration; add 'int' */ 378 error(1); 379 } else if (!tflag) { 380 /* old style declaration; add 'int' */ 381 warning(1); 382 } 383 } 384 | declmods deftyp T_SEMI { 385 if (dcs->d_scl == TYPEDEF) { 386 /* typedef declares no type name */ 387 warning(72); 388 } else { 389 /* empty declaration */ 390 warning(2); 391 } 392 } 393 | declmods deftyp notype_init_decls T_SEMI 394 | declspecs deftyp T_SEMI { 395 if (dcs->d_scl == TYPEDEF) { 396 /* typedef declares no type name */ 397 warning(72); 398 } else if (!dcs->d_nedecl) { 399 /* empty declaration */ 400 warning(2); 401 } 402 } 403 | declspecs deftyp type_init_decls T_SEMI 404 | error T_SEMI { 405 global_clean_up(); 406 } 407 | error T_RBRACE { 408 global_clean_up(); 409 } 410 ; 411 412 function_definition: /* C99 6.9.1 */ 413 func_decl { 414 if ($1->s_type->t_tspec != FUNC) { 415 /* syntax error '%s' */ 416 error(249, yytext); 417 YYERROR; 418 } 419 if ($1->s_type->t_typedef) { 420 /* ()-less function definition */ 421 error(64); 422 YYERROR; 423 } 424 funcdef($1); 425 block_level++; 426 pushdecl(ARG); 427 if (lwarn == LWARN_NONE) 428 $1->s_used = true; 429 } arg_declaration_list_opt { 430 popdecl(); 431 block_level--; 432 check_func_lint_directives(); 433 check_func_old_style_arguments(); 434 pushctrl(0); 435 } compound_statement { 436 funcend(); 437 popctrl(0); 438 } 439 ; 440 441 func_decl: 442 clrtyp deftyp notype_decl { 443 $$ = $3; 444 } 445 | declmods deftyp notype_decl { 446 $$ = $3; 447 } 448 | declspecs deftyp type_decl { 449 $$ = $3; 450 } 451 ; 452 453 arg_declaration_list_opt: 454 /* empty */ 455 | arg_declaration_list 456 ; 457 458 arg_declaration_list: 459 arg_declaration 460 | arg_declaration_list arg_declaration 461 /* XXX or better "arg_declaration error" ? */ 462 | error 463 ; 464 465 /* 466 * "arg_declaration" is separated from "declaration" because it 467 * needs other error handling. 468 */ 469 470 arg_declaration: 471 declmods deftyp T_SEMI { 472 /* empty declaration */ 473 warning(2); 474 } 475 | declmods deftyp notype_init_decls T_SEMI 476 | declspecs deftyp T_SEMI { 477 if (!dcs->d_nedecl) { 478 /* empty declaration */ 479 warning(2); 480 } else { 481 /* '%s' declared in argument declaration list */ 482 warning(3, type_name(dcs->d_type)); 483 } 484 } 485 | declspecs deftyp type_init_decls T_SEMI { 486 if (dcs->d_nedecl) { 487 /* '%s' declared in argument declaration list */ 488 warning(3, type_name(dcs->d_type)); 489 } 490 } 491 | declmods error 492 | declspecs error 493 ; 494 495 declaration: 496 declmods deftyp T_SEMI { 497 if (dcs->d_scl == TYPEDEF) { 498 /* typedef declares no type name */ 499 warning(72); 500 } else { 501 /* empty declaration */ 502 warning(2); 503 } 504 } 505 | declmods deftyp notype_init_decls T_SEMI 506 | declspecs deftyp T_SEMI { 507 if (dcs->d_scl == TYPEDEF) { 508 /* typedef declares no type name */ 509 warning(72); 510 } else if (!dcs->d_nedecl) { 511 /* empty declaration */ 512 warning(2); 513 } 514 } 515 | declspecs deftyp type_init_decls T_SEMI 516 | error T_SEMI 517 ; 518 519 type_attribute_format_type: 520 T_AT_FORMAT_GNU_PRINTF 521 | T_AT_FORMAT_PRINTF 522 | T_AT_FORMAT_SCANF 523 | T_AT_FORMAT_STRFMON 524 | T_AT_FORMAT_STRFTIME 525 | T_AT_FORMAT_SYSLOG 526 ; 527 528 type_attribute_bounded_type: 529 T_AT_MINBYTES 530 | T_AT_STRING 531 | T_AT_BUFFER 532 ; 533 534 535 type_attribute_spec: 536 /* empty */ 537 | T_AT_DEPRECATED T_LPAREN string T_RPAREN 538 | T_AT_DEPRECATED 539 | T_AT_ALIGNED T_LPAREN constant_expr T_RPAREN 540 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_COMMA constant_expr T_RPAREN 541 | T_AT_ALLOC_SIZE T_LPAREN constant_expr T_RPAREN 542 | T_AT_BOUNDED T_LPAREN type_attribute_bounded_type 543 T_COMMA constant_expr T_COMMA constant_expr T_RPAREN 544 | T_AT_SENTINEL T_LPAREN constant_expr T_RPAREN 545 | T_AT_SENTINEL 546 | T_AT_FORMAT_ARG T_LPAREN constant_expr T_RPAREN 547 | T_AT_NONNULL T_LPAREN constant_expr T_RPAREN 548 | T_AT_MODE T_LPAREN T_NAME T_RPAREN 549 | T_AT_ALIAS T_LPAREN string T_RPAREN 550 | T_AT_OPTIMIZE T_LPAREN string T_RPAREN 551 | T_AT_PCS T_LPAREN string T_RPAREN 552 | T_AT_SECTION T_LPAREN string T_RPAREN 553 | T_AT_TLS_MODEL T_LPAREN string T_RPAREN 554 | T_AT_ALIGNED 555 | T_AT_CONSTRUCTOR 556 | T_AT_DESTRUCTOR 557 | T_AT_MALLOC 558 | T_AT_MAY_ALIAS 559 | T_AT_NO_INSTRUMENT_FUNCTION 560 | T_AT_NOINLINE 561 | T_AT_NORETURN 562 | T_AT_NOTHROW 563 | T_AT_COLD 564 | T_AT_RETURNS_TWICE 565 | T_AT_PACKED { 566 addpacked(); 567 } 568 | T_AT_PURE 569 | T_AT_TUNION 570 | T_AT_GNU_INLINE 571 | T_AT_ALWAYS_INLINE 572 | T_AT_FORMAT T_LPAREN type_attribute_format_type T_COMMA 573 constant_expr T_COMMA constant_expr T_RPAREN 574 | T_AT_USED { 575 add_attr_used(); 576 } 577 | T_AT_UNUSED { 578 add_attr_used(); 579 } 580 | T_AT_WARN_UNUSED_RESULT 581 | T_AT_WEAK 582 | T_AT_VISIBILITY T_LPAREN constant_expr T_RPAREN 583 | T_QUAL { 584 if ($1 != CONST) 585 yyerror("Bad attribute"); 586 } 587 ; 588 589 type_attribute_spec_list: 590 type_attribute_spec 591 | type_attribute_spec_list T_COMMA type_attribute_spec 592 ; 593 594 type_attribute: 595 T_ATTRIBUTE T_LPAREN T_LPAREN { 596 attron = true; 597 } type_attribute_spec_list { 598 attron = false; 599 } T_RPAREN T_RPAREN 600 | T_PACKED { 601 addpacked(); 602 } 603 | T_NORETURN { 604 } 605 ; 606 607 type_attribute_list: 608 type_attribute 609 | type_attribute_list type_attribute 610 ; 611 612 clrtyp: 613 /* empty */ { 614 clrtyp(); 615 } 616 ; 617 618 deftyp: 619 /* empty */ { 620 deftyp(); 621 } 622 ; 623 624 declspecs: 625 clrtyp_typespec { 626 add_type($1); 627 } 628 | declmods typespec { 629 add_type($2); 630 } 631 | type_attribute declspecs 632 | declspecs declmod 633 | declspecs notype_typespec { 634 add_type($2); 635 } 636 ; 637 638 declmods: 639 clrtyp T_QUAL { 640 add_qualifier($2); 641 } 642 | clrtyp T_SCLASS { 643 add_storage_class($2); 644 } 645 | declmods declmod 646 ; 647 648 declmod: 649 T_QUAL { 650 add_qualifier($1); 651 } 652 | T_SCLASS { 653 add_storage_class($1); 654 } 655 | type_attribute_list 656 ; 657 658 clrtyp_typespec: 659 clrtyp notype_typespec { 660 $$ = $2; 661 } 662 | T_TYPENAME clrtyp { 663 $$ = getsym($1)->s_type; 664 } 665 ; 666 667 typespec: 668 notype_typespec { 669 $$ = $1; 670 } 671 | T_TYPENAME { 672 $$ = getsym($1)->s_type; 673 } 674 ; 675 676 notype_typespec: 677 T_TYPE { 678 $$ = gettyp($1); 679 } 680 | T_TYPEOF term { 681 $$ = $2->tn_type; 682 } 683 | struct_spec { 684 popdecl(); 685 $$ = $1; 686 } 687 | enum_spec { 688 popdecl(); 689 $$ = $1; 690 } 691 ; 692 693 struct_spec: 694 struct struct_tag { 695 /* 696 * STDC requires that "struct a;" always introduces 697 * a new tag if "a" is not declared at current level 698 * 699 * yychar is valid because otherwise the parser would not 700 * have been able to decide if it must shift or reduce 701 */ 702 $$ = mktag($2, $1, 0, yychar == T_SEMI); 703 } 704 | struct struct_tag { 705 dcs->d_tagtyp = mktag($2, $1, 1, 0); 706 } struct_declaration { 707 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $4); 708 } 709 | struct { 710 dcs->d_tagtyp = mktag(NULL, $1, 1, 0); 711 } struct_declaration { 712 $$ = complete_tag_struct_or_union(dcs->d_tagtyp, $3); 713 } 714 | struct error { 715 symtyp = FVFT; 716 $$ = gettyp(INT); 717 } 718 ; 719 720 struct: 721 struct type_attribute 722 | T_STRUCT_OR_UNION { 723 symtyp = FTAG; 724 pushdecl($1 == STRUCT ? MOS : MOU); 725 dcs->d_offset = 0; 726 dcs->d_stralign = CHAR_SIZE; 727 $$ = $1; 728 } 729 ; 730 731 struct_tag: 732 identifier { 733 $$ = getsym($1); 734 } 735 ; 736 737 struct_declaration: 738 struct_decl_lbrace member_declaration_list_with_rbrace { 739 $$ = $2; 740 } 741 ; 742 743 struct_decl_lbrace: 744 T_LBRACE { 745 symtyp = FVFT; 746 } 747 ; 748 749 member_declaration_list_with_rbrace: 750 member_declaration_list T_SEMI T_RBRACE { 751 $$ = $1; 752 } 753 | member_declaration_list T_RBRACE { 754 if (sflag) { 755 /* syntax req. ';' after last struct/union member */ 756 error(66); 757 } else { 758 /* syntax req. ';' after last struct/union member */ 759 warning(66); 760 } 761 $$ = $1; 762 } 763 | T_RBRACE { 764 $$ = NULL; 765 } 766 ; 767 768 opt_type_attribute: 769 /* empty */ 770 | type_attribute 771 ; 772 773 member_declaration_list: 774 member_declaration { 775 $$ = $1; 776 } 777 | member_declaration_list T_SEMI member_declaration { 778 $$ = lnklst($1, $3); 779 } 780 ; 781 782 member_declaration: 783 noclass_declmods deftyp { 784 /* too late, i know, but getsym() compensates it */ 785 symtyp = FMEMBER; 786 } notype_member_decls opt_type_attribute { 787 symtyp = FVFT; 788 $$ = $4; 789 } 790 | noclass_declspecs deftyp { 791 symtyp = FMEMBER; 792 } type_member_decls opt_type_attribute { 793 symtyp = FVFT; 794 $$ = $4; 795 } 796 | noclass_declmods deftyp opt_type_attribute { 797 symtyp = FVFT; 798 /* struct or union member must be named */ 799 if (!Sflag) 800 /* anonymous struct/union members is a C9X feature */ 801 warning(49); 802 /* add all the members of the anonymous struct/union */ 803 $$ = dcs->d_type->t_str->sou_first_member; 804 anonymize($$); 805 } 806 | noclass_declspecs deftyp opt_type_attribute { 807 symtyp = FVFT; 808 /* struct or union member must be named */ 809 if (!Sflag) 810 /* anonymous struct/union members is a C9X feature */ 811 warning(49); 812 $$ = dcs->d_type->t_str->sou_first_member; 813 /* add all the members of the anonymous struct/union */ 814 anonymize($$); 815 } 816 | error { 817 symtyp = FVFT; 818 $$ = NULL; 819 } 820 ; 821 822 noclass_declspecs: 823 clrtyp_typespec { 824 add_type($1); 825 } 826 | type_attribute noclass_declspecs 827 | noclass_declmods typespec { 828 add_type($2); 829 } 830 | noclass_declspecs T_QUAL { 831 add_qualifier($2); 832 } 833 | noclass_declspecs notype_typespec { 834 add_type($2); 835 } 836 | noclass_declspecs type_attribute 837 ; 838 839 noclass_declmods: 840 clrtyp T_QUAL { 841 add_qualifier($2); 842 } 843 | noclass_declmods T_QUAL { 844 add_qualifier($2); 845 } 846 ; 847 848 notype_member_decls: 849 notype_member_decl { 850 $$ = declarator_1_struct_union($1); 851 } 852 | notype_member_decls { 853 symtyp = FMEMBER; 854 } T_COMMA type_member_decl { 855 $$ = lnklst($1, declarator_1_struct_union($4)); 856 } 857 ; 858 859 type_member_decls: 860 type_member_decl { 861 $$ = declarator_1_struct_union($1); 862 } 863 | type_member_decls { 864 symtyp = FMEMBER; 865 } T_COMMA type_member_decl { 866 $$ = lnklst($1, declarator_1_struct_union($4)); 867 } 868 ; 869 870 notype_member_decl: 871 notype_decl { 872 $$ = $1; 873 } 874 | notype_decl T_COLON constant_expr { /* C99 6.7.2.1 */ 875 $$ = bitfield($1, to_int_constant($3, true)); 876 } 877 | { 878 symtyp = FVFT; 879 } T_COLON constant_expr { /* C99 6.7.2.1 */ 880 $$ = bitfield(NULL, to_int_constant($3, true)); 881 } 882 ; 883 884 type_member_decl: 885 type_decl { 886 $$ = $1; 887 } 888 | type_decl T_COLON constant_expr { 889 $$ = bitfield($1, to_int_constant($3, true)); 890 } 891 | { 892 symtyp = FVFT; 893 } T_COLON constant_expr { 894 $$ = bitfield(NULL, to_int_constant($3, true)); 895 } 896 ; 897 898 enum_spec: 899 enum enum_tag { 900 $$ = mktag($2, ENUM, 0, 0); 901 } 902 | enum enum_tag { 903 dcs->d_tagtyp = mktag($2, ENUM, 1, 0); 904 } enum_declaration { 905 $$ = complete_tag_enum(dcs->d_tagtyp, $4); 906 } 907 | enum { 908 dcs->d_tagtyp = mktag(NULL, ENUM, 1, 0); 909 } enum_declaration { 910 $$ = complete_tag_enum(dcs->d_tagtyp, $3); 911 } 912 | enum error { 913 symtyp = FVFT; 914 $$ = gettyp(INT); 915 } 916 ; 917 918 enum: 919 T_ENUM { 920 symtyp = FTAG; 921 pushdecl(CTCONST); 922 } 923 ; 924 925 enum_tag: 926 identifier { 927 $$ = getsym($1); 928 } 929 ; 930 931 enum_declaration: 932 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 933 $$ = $2; 934 } 935 ; 936 937 enum_decl_lbrace: 938 T_LBRACE { 939 symtyp = FVFT; 940 enumval = 0; 941 } 942 ; 943 944 enums_with_opt_comma: 945 enums { 946 $$ = $1; 947 } 948 | enums T_COMMA { 949 if (sflag) { 950 /* trailing ',' prohibited in enum declaration */ 951 error(54); 952 } else { 953 /* trailing ',' prohibited in enum declaration */ 954 c99ism(54); 955 } 956 $$ = $1; 957 } 958 ; 959 960 enums: 961 enumerator { 962 $$ = $1; 963 } 964 | enums T_COMMA enumerator { 965 $$ = lnklst($1, $3); 966 } 967 | error { 968 $$ = NULL; 969 } 970 ; 971 972 enumerator: 973 enumeration_constant { 974 $$ = enumeration_constant($1, enumval, 1); 975 } 976 | enumeration_constant T_ASSIGN constant_expr { 977 $$ = enumeration_constant($1, to_int_constant($3, true), 0); 978 } 979 ; 980 981 enumeration_constant: /* C99 6.4.4.3 */ 982 identifier { 983 $$ = getsym($1); 984 } 985 ; 986 987 988 notype_init_decls: 989 notype_init_decl 990 | notype_init_decls T_COMMA type_init_decl 991 ; 992 993 type_init_decls: 994 type_init_decl 995 | type_init_decls T_COMMA type_init_decl 996 ; 997 998 notype_init_decl: 999 notype_decl opt_asm_or_symbolrename { 1000 cgram_declare($1, false, $2); 1001 check_size($1); 1002 } 1003 | notype_decl opt_asm_or_symbolrename { 1004 cgram_declare($1, true, $2); 1005 } T_ASSIGN initializer { 1006 check_size($1); 1007 } 1008 ; 1009 1010 type_init_decl: 1011 type_decl opt_asm_or_symbolrename { 1012 cgram_declare($1, false, $2); 1013 check_size($1); 1014 } 1015 | type_decl opt_asm_or_symbolrename { 1016 cgram_declare($1, true, $2); 1017 } T_ASSIGN initializer { 1018 check_size($1); 1019 } 1020 ; 1021 1022 notype_decl: 1023 notype_direct_decl { 1024 $$ = $1; 1025 } 1026 | pointer notype_direct_decl { 1027 $$ = add_pointer($2, $1); 1028 } 1029 ; 1030 1031 notype_direct_decl: 1032 T_NAME { 1033 $$ = declarator_name(getsym($1)); 1034 } 1035 | T_LPAREN type_decl T_RPAREN { 1036 $$ = $2; 1037 } 1038 | type_attribute notype_direct_decl { 1039 $$ = $2; 1040 } 1041 | notype_direct_decl T_LBRACK T_RBRACK { 1042 $$ = add_array($1, 0, 0); 1043 } 1044 | notype_direct_decl T_LBRACK constant_expr T_RBRACK { 1045 $$ = add_array($1, 1, to_int_constant($3, false)); 1046 } 1047 | notype_direct_decl param_list opt_asm_or_symbolrename { 1048 $$ = add_function(symbolrename($1, $3), $2); 1049 popdecl(); 1050 block_level--; 1051 } 1052 | notype_direct_decl type_attribute_list 1053 ; 1054 1055 type_decl: 1056 type_direct_decl { 1057 $$ = $1; 1058 } 1059 | pointer type_direct_decl { 1060 $$ = add_pointer($2, $1); 1061 } 1062 ; 1063 1064 type_direct_decl: 1065 identifier { 1066 $$ = declarator_name(getsym($1)); 1067 } 1068 | T_LPAREN type_decl T_RPAREN { 1069 $$ = $2; 1070 } 1071 | type_attribute type_direct_decl { 1072 $$ = $2; 1073 } 1074 | type_direct_decl T_LBRACK T_RBRACK { 1075 $$ = add_array($1, 0, 0); 1076 } 1077 | type_direct_decl T_LBRACK constant_expr T_RBRACK { 1078 $$ = add_array($1, 1, to_int_constant($3, false)); 1079 } 1080 | type_direct_decl param_list opt_asm_or_symbolrename { 1081 $$ = add_function(symbolrename($1, $3), $2); 1082 popdecl(); 1083 block_level--; 1084 } 1085 | type_direct_decl type_attribute_list 1086 ; 1087 1088 /* 1089 * param_decl and notype_param_decl exist to avoid a conflict in 1090 * argument lists. A typename enclosed in parens should always be 1091 * treated as a typename, not an argument. 1092 * "typedef int a; f(int (a));" is "typedef int a; f(int foo(a));" 1093 * not "typedef int a; f(int a);" 1094 */ 1095 param_decl: 1096 direct_param_decl { 1097 $$ = $1; 1098 } 1099 | pointer direct_param_decl { 1100 $$ = add_pointer($2, $1); 1101 } 1102 ; 1103 1104 direct_param_decl: 1105 identifier type_attribute_list { 1106 $$ = declarator_name(getsym($1)); 1107 } 1108 | identifier { 1109 $$ = declarator_name(getsym($1)); 1110 } 1111 | T_LPAREN notype_param_decl T_RPAREN { 1112 $$ = $2; 1113 } 1114 | direct_param_decl T_LBRACK T_RBRACK { 1115 $$ = add_array($1, 0, 0); 1116 } 1117 | direct_param_decl T_LBRACK constant_expr T_RBRACK { 1118 $$ = add_array($1, 1, to_int_constant($3, false)); 1119 } 1120 | direct_param_decl param_list opt_asm_or_symbolrename { 1121 $$ = add_function(symbolrename($1, $3), $2); 1122 popdecl(); 1123 block_level--; 1124 } 1125 ; 1126 1127 notype_param_decl: 1128 direct_notype_param_decl { 1129 $$ = $1; 1130 } 1131 | pointer direct_notype_param_decl { 1132 $$ = add_pointer($2, $1); 1133 } 1134 ; 1135 1136 direct_notype_param_decl: 1137 identifier { 1138 $$ = declarator_name(getsym($1)); 1139 } 1140 | T_LPAREN notype_param_decl T_RPAREN { 1141 $$ = $2; 1142 } 1143 | direct_notype_param_decl T_LBRACK T_RBRACK { 1144 $$ = add_array($1, 0, 0); 1145 } 1146 | direct_notype_param_decl T_LBRACK constant_expr T_RBRACK { 1147 $$ = add_array($1, 1, to_int_constant($3, false)); 1148 } 1149 | direct_notype_param_decl param_list opt_asm_or_symbolrename { 1150 $$ = add_function(symbolrename($1, $3), $2); 1151 popdecl(); 1152 block_level--; 1153 } 1154 ; 1155 1156 pointer: 1157 asterisk { 1158 $$ = $1; 1159 } 1160 | asterisk type_qualifier_list { 1161 $$ = merge_pointers_and_qualifiers($1, $2); 1162 } 1163 | asterisk pointer { 1164 $$ = merge_pointers_and_qualifiers($1, $2); 1165 } 1166 | asterisk type_qualifier_list pointer { 1167 $$ = merge_pointers_and_qualifiers($1, $2); 1168 $$ = merge_pointers_and_qualifiers($$, $3); 1169 } 1170 ; 1171 1172 asterisk: 1173 T_ASTERISK { 1174 $$ = xcalloc(1, sizeof (pqinf_t)); 1175 $$->p_pcnt = 1; 1176 } 1177 ; 1178 1179 type_qualifier_list: 1180 type_qualifier { 1181 $$ = $1; 1182 } 1183 | type_qualifier_list type_qualifier { 1184 $$ = merge_pointers_and_qualifiers($1, $2); 1185 } 1186 ; 1187 1188 type_qualifier: 1189 T_QUAL { 1190 $$ = xcalloc(1, sizeof (pqinf_t)); 1191 if ($1 == CONST) { 1192 $$->p_const = true; 1193 } else if ($1 == VOLATILE) { 1194 $$->p_volatile = true; 1195 } else { 1196 lint_assert($1 == RESTRICT || $1 == THREAD); 1197 } 1198 } 1199 ; 1200 1201 param_list: 1202 id_list_lparen identifier_list T_RPAREN { 1203 $$ = $2; 1204 } 1205 | abstract_decl_param_list { 1206 $$ = $1; 1207 } 1208 ; 1209 1210 id_list_lparen: 1211 T_LPAREN { 1212 block_level++; 1213 pushdecl(PROTO_ARG); 1214 } 1215 ; 1216 1217 identifier_list: 1218 T_NAME { 1219 $$ = old_style_function_name(getsym($1)); 1220 } 1221 | identifier_list T_COMMA T_NAME { 1222 $$ = lnklst($1, old_style_function_name(getsym($3))); 1223 } 1224 | identifier_list error { 1225 $$ = $1; 1226 } 1227 ; 1228 1229 abstract_decl_param_list: 1230 abstract_decl_lparen T_RPAREN { 1231 $$ = NULL; 1232 } 1233 | abstract_decl_lparen vararg_parameter_type_list T_RPAREN { 1234 dcs->d_proto = true; 1235 $$ = $2; 1236 } 1237 | abstract_decl_lparen error T_RPAREN { 1238 $$ = NULL; 1239 } 1240 ; 1241 1242 abstract_decl_lparen: 1243 T_LPAREN { 1244 block_level++; 1245 pushdecl(PROTO_ARG); 1246 } 1247 ; 1248 1249 vararg_parameter_type_list: 1250 parameter_type_list { 1251 $$ = $1; 1252 } 1253 | parameter_type_list T_COMMA T_ELLIPSIS { 1254 dcs->d_vararg = true; 1255 $$ = $1; 1256 } 1257 | T_ELLIPSIS { 1258 if (sflag) { 1259 /* ANSI C requires formal parameter before '...' */ 1260 error(84); 1261 } else if (!tflag) { 1262 /* ANSI C requires formal parameter before '...' */ 1263 warning(84); 1264 } 1265 dcs->d_vararg = true; 1266 $$ = NULL; 1267 } 1268 ; 1269 1270 parameter_type_list: 1271 parameter_declaration { 1272 $$ = $1; 1273 } 1274 | parameter_type_list T_COMMA parameter_declaration { 1275 $$ = lnklst($1, $3); 1276 } 1277 ; 1278 1279 parameter_declaration: 1280 declmods deftyp { 1281 $$ = declare_argument(abstract_name(), 0); 1282 } 1283 | declspecs deftyp { 1284 $$ = declare_argument(abstract_name(), 0); 1285 } 1286 | declmods deftyp notype_param_decl { 1287 $$ = declare_argument($3, 0); 1288 } 1289 /* 1290 * param_decl is needed because of following conflict: 1291 * "typedef int a; f(int (a));" could be parsed as 1292 * "function with argument a of type int", or 1293 * "function with an abstract argument of type function". 1294 * This grammar realizes the second case. 1295 */ 1296 | declspecs deftyp param_decl { 1297 $$ = declare_argument($3, 0); 1298 } 1299 | declmods deftyp abstract_decl { 1300 $$ = declare_argument($3, 0); 1301 } 1302 | declspecs deftyp abstract_decl { 1303 $$ = declare_argument($3, 0); 1304 } 1305 ; 1306 1307 opt_asm_or_symbolrename: /* expect only one */ 1308 /* empty */ { 1309 $$ = NULL; 1310 } 1311 | T_ASM T_LPAREN T_STRING T_RPAREN { 1312 freeyyv(&$3, T_STRING); 1313 $$ = NULL; 1314 } 1315 | T_SYMBOLRENAME T_LPAREN T_NAME T_RPAREN { 1316 $$ = $3; 1317 } 1318 ; 1319 1320 initializer: 1321 { 1322 cgram_debug("begin initializer"); 1323 } init_assign_expr { 1324 cgram_debug("end initializer"); 1325 } 1326 ; 1327 1328 init_assign_expr: 1329 | init_by_name init_base_expr %prec T_COMMA 1330 | init_base_expr 1331 1332 init_base_expr: 1333 expr %prec T_COMMA { 1334 init_using_expr($1); 1335 } 1336 | init_lbrace init_rbrace { 1337 /* XXX: Empty braces are not covered by C99 6.7.8. */ 1338 } 1339 | init_lbrace init_expr_list init_rbrace 1340 | init_lbrace init_expr_list T_COMMA init_rbrace 1341 | error 1342 ; 1343 1344 init_expr_list: 1345 init_assign_expr %prec T_COMMA 1346 | init_expr_list T_COMMA init_assign_expr 1347 ; 1348 1349 range: 1350 constant_expr { 1351 $$.lo = to_int_constant($1, true); 1352 $$.hi = $$.lo; 1353 } 1354 | constant_expr T_ELLIPSIS constant_expr { 1355 $$.lo = to_int_constant($1, true); 1356 $$.hi = to_int_constant($3, true); 1357 /* initialization with '[a...b]' is a GNU extension */ 1358 gnuism(340); 1359 } 1360 ; 1361 1362 designator: /* C99 6.7.8 "Initialization" */ 1363 T_LBRACK range T_RBRACK { 1364 designator_push_subscript($2); 1365 if (!Sflag) 1366 /* array initializer with des.s is a C9X feature */ 1367 warning(321); 1368 } 1369 | point identifier { 1370 if (!Sflag) 1371 /* struct or union member name in initializer is ... */ 1372 warning(313); 1373 designator_push_name($2); 1374 } 1375 ; 1376 1377 designator_list: /* C99 6.7.8 "Initialization" */ 1378 designator 1379 | designator_list designator 1380 ; 1381 1382 init_by_name: 1383 designator_list T_ASSIGN 1384 | identifier T_COLON { 1385 /* GCC style struct or union member name in initializer */ 1386 gnuism(315); 1387 designator_push_name($1); 1388 } 1389 ; 1390 1391 init_lbrace: 1392 T_LBRACE { 1393 init_lbrace(); 1394 } 1395 ; 1396 1397 init_rbrace: 1398 T_RBRACE { 1399 init_rbrace(); 1400 } 1401 ; 1402 1403 type_name: 1404 { 1405 pushdecl(ABSTRACT); 1406 } abstract_declaration { 1407 popdecl(); 1408 $$ = $2->s_type; 1409 } 1410 ; 1411 1412 abstract_declaration: 1413 noclass_declmods deftyp { 1414 $$ = declare_1_abstract(abstract_name()); 1415 } 1416 | noclass_declspecs deftyp { 1417 $$ = declare_1_abstract(abstract_name()); 1418 } 1419 | noclass_declmods deftyp abstract_decl { 1420 $$ = declare_1_abstract($3); 1421 } 1422 | noclass_declspecs deftyp abstract_decl { 1423 $$ = declare_1_abstract($3); 1424 } 1425 ; 1426 1427 abstract_decl: 1428 pointer { 1429 $$ = add_pointer(abstract_name(), $1); 1430 } 1431 | direct_abstract_decl { 1432 $$ = $1; 1433 } 1434 | pointer direct_abstract_decl { 1435 $$ = add_pointer($2, $1); 1436 } 1437 | T_TYPEOF term { 1438 $$ = mktempsym($2->tn_type); 1439 } 1440 ; 1441 1442 direct_abstract_decl: 1443 T_LPAREN abstract_decl T_RPAREN { 1444 $$ = $2; 1445 } 1446 | T_LBRACK T_RBRACK { 1447 $$ = add_array(abstract_name(), 0, 0); 1448 } 1449 | T_LBRACK constant_expr T_RBRACK { 1450 $$ = add_array(abstract_name(), 1, to_int_constant($2, false)); 1451 } 1452 | type_attribute direct_abstract_decl { 1453 $$ = $2; 1454 } 1455 | direct_abstract_decl T_LBRACK T_RBRACK { 1456 $$ = add_array($1, 0, 0); 1457 } 1458 | direct_abstract_decl T_LBRACK constant_expr T_RBRACK { 1459 $$ = add_array($1, 1, to_int_constant($3, false)); 1460 } 1461 | abstract_decl_param_list opt_asm_or_symbolrename { 1462 $$ = add_function(symbolrename(abstract_name(), $2), $1); 1463 popdecl(); 1464 block_level--; 1465 } 1466 | direct_abstract_decl abstract_decl_param_list opt_asm_or_symbolrename { 1467 $$ = add_function(symbolrename($1, $3), $2); 1468 popdecl(); 1469 block_level--; 1470 } 1471 | direct_abstract_decl type_attribute_list 1472 ; 1473 1474 non_expr_statement: 1475 labeled_statement 1476 | compound_statement 1477 | selection_statement 1478 | iteration_statement 1479 | jump_statement { 1480 ftflg = false; 1481 } 1482 | asm_statement 1483 1484 statement: /* C99 6.8 */ 1485 expr_statement 1486 | non_expr_statement 1487 ; 1488 1489 labeled_statement: /* C99 6.8.1 */ 1490 label statement 1491 ; 1492 1493 label: 1494 T_NAME T_COLON { 1495 symtyp = FLABEL; 1496 named_label(getsym($1)); 1497 } 1498 | T_CASE constant_expr T_COLON { 1499 case_label($2); 1500 ftflg = true; 1501 } 1502 | T_CASE constant_expr T_ELLIPSIS constant_expr T_COLON { 1503 /* XXX: We don't fill all cases */ 1504 case_label($2); 1505 ftflg = true; 1506 } 1507 | T_DEFAULT T_COLON { 1508 default_label(); 1509 ftflg = true; 1510 } 1511 ; 1512 1513 statement_d_list: 1514 statement_list 1515 | statement_d_list declaration_list statement_list { 1516 if (!Sflag) 1517 /* declarations after statements is a C9X feature */ 1518 c99ism(327); 1519 } 1520 ; 1521 1522 compound_statement: /* C99 6.8.2 */ 1523 compound_statement_lbrace compound_statement_rbrace 1524 | compound_statement_lbrace statement_d_list compound_statement_rbrace 1525 | compound_statement_lbrace declaration_list compound_statement_rbrace 1526 | compound_statement_lbrace declaration_list statement_d_list 1527 compound_statement_rbrace 1528 ; 1529 1530 compound_statement_lbrace: 1531 T_LBRACE { 1532 block_level++; 1533 mem_block_level++; 1534 pushdecl(AUTO); 1535 } 1536 ; 1537 1538 compound_statement_rbrace: 1539 T_RBRACE { 1540 popdecl(); 1541 freeblk(); 1542 mem_block_level--; 1543 block_level--; 1544 ftflg = false; 1545 } 1546 ; 1547 1548 statement_list: 1549 statement 1550 | statement_list statement { 1551 RESTORE_WARN_FLAGS(__FILE__, __LINE__); 1552 } 1553 | statement_list error T_SEMI 1554 ; 1555 1556 expr_statement: 1557 expr T_SEMI { 1558 expr($1, false, false, false, false); 1559 ftflg = false; 1560 } 1561 | T_SEMI { 1562 ftflg = false; 1563 } 1564 ; 1565 1566 /* 1567 * The following two productions are used to implement 1568 * ({ [[decl-list] stmt-list] }). 1569 * XXX: This is not well tested. 1570 */ 1571 expr_statement_val: 1572 expr T_SEMI { 1573 /* XXX: We should really do that only on the last name */ 1574 if ($1->tn_op == NAME) 1575 $1->tn_sym->s_used = true; 1576 $$ = $1; 1577 expr($1, false, false, false, false); 1578 ftflg = false; 1579 } 1580 | non_expr_statement { 1581 $$ = getnode(); 1582 $$->tn_type = gettyp(VOID); 1583 } 1584 ; 1585 1586 expr_statement_list: 1587 expr_statement_val 1588 | expr_statement_list expr_statement_val { 1589 $$ = $2; 1590 } 1591 ; 1592 1593 selection_statement: /* C99 6.8.4 */ 1594 if_without_else { 1595 SAVE_WARN_FLAGS(__FILE__, __LINE__); 1596 if2(); 1597 if3(0); 1598 } 1599 | if_without_else T_ELSE { 1600 SAVE_WARN_FLAGS(__FILE__, __LINE__); 1601 if2(); 1602 } statement { 1603 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1604 if3(1); 1605 } 1606 | if_without_else T_ELSE error { 1607 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1608 if3(0); 1609 } 1610 | switch_expr statement { 1611 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1612 switch2(); 1613 } 1614 | switch_expr error { 1615 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1616 switch2(); 1617 } 1618 ; 1619 1620 if_without_else: 1621 if_expr statement 1622 | if_expr error 1623 ; 1624 1625 if_expr: 1626 T_IF T_LPAREN expr T_RPAREN { 1627 if1($3); 1628 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1629 } 1630 ; 1631 1632 switch_expr: 1633 T_SWITCH T_LPAREN expr T_RPAREN { 1634 switch1($3); 1635 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1636 } 1637 ; 1638 1639 association: 1640 type_name T_COLON expr 1641 | T_DEFAULT T_COLON expr 1642 ; 1643 1644 association_list: 1645 association 1646 | association_list T_COMMA association 1647 ; 1648 1649 generic_expr: 1650 T_GENERIC T_LPAREN expr T_COMMA association_list T_RPAREN { 1651 $$ = $3; 1652 } 1653 ; 1654 1655 do_statement: 1656 do statement { 1657 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1658 } 1659 ; 1660 1661 iteration_statement: /* C99 6.8.5 */ 1662 while_expr statement { 1663 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1664 while2(); 1665 } 1666 | while_expr error { 1667 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1668 while2(); 1669 } 1670 | do_statement do_while_expr { 1671 do2($2); 1672 ftflg = false; 1673 } 1674 | do error { 1675 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1676 do2(NULL); 1677 } 1678 | for_exprs statement { 1679 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1680 for2(); 1681 popdecl(); 1682 block_level--; 1683 } 1684 | for_exprs error { 1685 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1686 for2(); 1687 popdecl(); 1688 block_level--; 1689 } 1690 ; 1691 1692 while_expr: 1693 T_WHILE T_LPAREN expr T_RPAREN { 1694 while1($3); 1695 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1696 } 1697 ; 1698 1699 do: 1700 T_DO { 1701 do1(); 1702 } 1703 ; 1704 1705 do_while_expr: 1706 T_WHILE T_LPAREN expr T_RPAREN T_SEMI { 1707 $$ = $3; 1708 } 1709 ; 1710 1711 for_start: 1712 T_FOR T_LPAREN { 1713 pushdecl(AUTO); 1714 block_level++; 1715 } 1716 ; 1717 for_exprs: 1718 for_start declspecs deftyp notype_init_decls T_SEMI opt_expr 1719 T_SEMI opt_expr T_RPAREN { 1720 /* variable declaration in for loop */ 1721 c99ism(325); 1722 for1(NULL, $6, $8); 1723 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1724 } 1725 | for_start opt_expr T_SEMI opt_expr T_SEMI opt_expr T_RPAREN { 1726 for1($2, $4, $6); 1727 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1728 } 1729 ; 1730 1731 opt_expr: 1732 /* empty */ { 1733 $$ = NULL; 1734 } 1735 | expr { 1736 $$ = $1; 1737 } 1738 ; 1739 1740 jump_statement: /* C99 6.8.6 */ 1741 goto identifier T_SEMI { 1742 dogoto(getsym($2)); 1743 } 1744 | goto error T_SEMI { 1745 symtyp = FVFT; 1746 } 1747 | T_CONTINUE T_SEMI { 1748 docont(); 1749 } 1750 | T_BREAK T_SEMI { 1751 dobreak(); 1752 } 1753 | T_RETURN T_SEMI { 1754 doreturn(NULL); 1755 } 1756 | T_RETURN expr T_SEMI { 1757 doreturn($2); 1758 } 1759 ; 1760 1761 goto: 1762 T_GOTO { 1763 symtyp = FLABEL; 1764 } 1765 ; 1766 1767 asm_statement: 1768 T_ASM T_LPAREN read_until_rparen T_SEMI { 1769 setasm(); 1770 } 1771 | T_ASM T_QUAL T_LPAREN read_until_rparen T_SEMI { 1772 setasm(); 1773 } 1774 | T_ASM error 1775 ; 1776 1777 read_until_rparen: 1778 /* empty */ { 1779 ignore_up_to_rparen(); 1780 } 1781 ; 1782 1783 declaration_list: 1784 declaration { 1785 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1786 } 1787 | declaration_list declaration { 1788 CLEAR_WARN_FLAGS(__FILE__, __LINE__); 1789 } 1790 ; 1791 1792 constant_expr: /* C99 6.6 */ 1793 expr %prec T_ASSIGN { 1794 $$ = $1; 1795 } 1796 ; 1797 1798 expr: 1799 expr T_ASTERISK expr { 1800 $$ = build(MULT, $1, $3); 1801 } 1802 | expr T_MULTIPLICATIVE expr { 1803 $$ = build($2, $1, $3); 1804 } 1805 | expr T_ADDITIVE expr { 1806 $$ = build($2, $1, $3); 1807 } 1808 | expr T_SHIFT expr { 1809 $$ = build($2, $1, $3); 1810 } 1811 | expr T_RELATIONAL expr { 1812 $$ = build($2, $1, $3); 1813 } 1814 | expr T_EQUALITY expr { 1815 $$ = build($2, $1, $3); 1816 } 1817 | expr T_AMPER expr { 1818 $$ = build(BITAND, $1, $3); 1819 } 1820 | expr T_XOR expr { 1821 $$ = build(BITXOR, $1, $3); 1822 } 1823 | expr T_BITOR expr { 1824 $$ = build(BITOR, $1, $3); 1825 } 1826 | expr T_LOGAND expr { 1827 $$ = build(LOGAND, $1, $3); 1828 } 1829 | expr T_LOGOR expr { 1830 $$ = build(LOGOR, $1, $3); 1831 } 1832 | expr T_QUEST expr T_COLON expr { 1833 $$ = build(QUEST, $1, build(COLON, $3, $5)); 1834 } 1835 | expr T_ASSIGN expr { 1836 $$ = build(ASSIGN, $1, $3); 1837 } 1838 | expr T_OPASSIGN expr { 1839 $$ = build($2, $1, $3); 1840 } 1841 | expr T_COMMA expr { 1842 $$ = build(COMMA, $1, $3); 1843 } 1844 | term { 1845 $$ = $1; 1846 } 1847 | generic_expr { 1848 $$ = $1; 1849 } 1850 ; 1851 1852 term: 1853 T_NAME { 1854 /* XXX really necessary? */ 1855 if (yychar < 0) 1856 yychar = yylex(); 1857 $$ = new_name_node(getsym($1), yychar); 1858 } 1859 | string { 1860 $$ = new_string_node($1); 1861 } 1862 | T_CON { 1863 $$ = new_constant_node(gettyp($1->v_tspec), $1); 1864 } 1865 | T_LPAREN expr T_RPAREN { 1866 if ($2 != NULL) 1867 $2->tn_parenthesized = true; 1868 $$ = $2; 1869 } 1870 | T_LPAREN compound_statement_lbrace declaration_list 1871 expr_statement_list { 1872 block_level--; 1873 mem_block_level--; 1874 initsym = mktempsym(duptyp($4->tn_type)); 1875 mem_block_level++; 1876 block_level++; 1877 /* ({ }) is a GCC extension */ 1878 gnuism(320); 1879 } compound_statement_rbrace T_RPAREN { 1880 $$ = new_name_node(initsym, 0); 1881 } 1882 | T_LPAREN compound_statement_lbrace expr_statement_list { 1883 block_level--; 1884 mem_block_level--; 1885 initsym = mktempsym($3->tn_type); 1886 mem_block_level++; 1887 block_level++; 1888 /* ({ }) is a GCC extension */ 1889 gnuism(320); 1890 } compound_statement_rbrace T_RPAREN { 1891 $$ = new_name_node(initsym, 0); 1892 } 1893 | term T_INCDEC { 1894 $$ = build($2 == INC ? INCAFT : DECAFT, $1, NULL); 1895 } 1896 | T_INCDEC term { 1897 $$ = build($1 == INC ? INCBEF : DECBEF, $2, NULL); 1898 } 1899 | T_ASTERISK term { 1900 $$ = build(INDIR, $2, NULL); 1901 } 1902 | T_AMPER term { 1903 $$ = build(ADDR, $2, NULL); 1904 } 1905 | T_UNARY term { 1906 $$ = build($1, $2, NULL); 1907 } 1908 | T_ADDITIVE term { 1909 if (tflag && $1 == PLUS) { 1910 /* unary + is illegal in traditional C */ 1911 warning(100); 1912 } 1913 $$ = build($1 == PLUS ? UPLUS : UMINUS, $2, NULL); 1914 } 1915 | term T_LBRACK expr T_RBRACK { 1916 $$ = build(INDIR, build(PLUS, $1, $3), NULL); 1917 } 1918 | term T_LPAREN T_RPAREN { 1919 $$ = new_function_call_node($1, NULL); 1920 } 1921 | term T_LPAREN func_arg_list T_RPAREN { 1922 $$ = new_function_call_node($1, $3); 1923 } 1924 | term point_or_arrow T_NAME { 1925 if ($1 != NULL) { 1926 sym_t *msym; 1927 /* 1928 * XXX struct_or_union_member should be integrated 1929 * in build() 1930 */ 1931 if ($2 == ARROW) { 1932 /* 1933 * must do this before struct_or_union_member 1934 * is called 1935 */ 1936 $1 = cconv($1); 1937 } 1938 msym = struct_or_union_member($1, $2, getsym($3)); 1939 $$ = build($2, $1, new_name_node(msym, 0)); 1940 } else { 1941 $$ = NULL; 1942 } 1943 } 1944 | T_REAL term { 1945 $$ = build(REAL, $2, NULL); 1946 } 1947 | T_IMAG term { 1948 $$ = build(IMAG, $2, NULL); 1949 } 1950 | T_EXTENSION term { 1951 $$ = $2; 1952 } 1953 | T_REAL T_LPAREN term T_RPAREN { 1954 $$ = build(REAL, $3, NULL); 1955 } 1956 | T_IMAG T_LPAREN term T_RPAREN { 1957 $$ = build(IMAG, $3, NULL); 1958 } 1959 | T_BUILTIN_OFFSETOF T_LPAREN type_name T_COMMA identifier T_RPAREN 1960 %prec T_BUILTIN_OFFSETOF { 1961 symtyp = FMEMBER; 1962 $$ = build_offsetof($3, getsym($5)); 1963 } 1964 | T_SIZEOF term %prec T_SIZEOF { 1965 $$ = $2 == NULL ? NULL : build_sizeof($2->tn_type); 1966 if ($$ != NULL) 1967 check_expr_misc($2, 0, 0, 0, 0, 0, 1); 1968 } 1969 | T_SIZEOF T_LPAREN type_name T_RPAREN %prec T_SIZEOF { 1970 $$ = build_sizeof($3); 1971 } 1972 | T_ALIGNOF T_LPAREN type_name T_RPAREN %prec T_ALIGNOF { 1973 $$ = build_alignof($3); 1974 } 1975 | T_LPAREN type_name T_RPAREN term %prec T_UNARY { 1976 $$ = cast($4, $2); 1977 } 1978 | T_LPAREN type_name T_RPAREN %prec T_UNARY { 1979 sym_t *tmp = mktempsym($2); 1980 cgram_declare(tmp, true, NULL); 1981 } init_lbrace init_expr_list init_rbrace { 1982 if (!Sflag) 1983 /* compound literals are a C9X/GCC extension */ 1984 gnuism(319); 1985 $$ = new_name_node(initsym, 0); 1986 } 1987 ; 1988 1989 string: 1990 T_STRING { 1991 $$ = $1; 1992 } 1993 | T_STRING string2 { 1994 $$ = cat_strings($1, $2); 1995 } 1996 ; 1997 1998 string2: 1999 T_STRING { 2000 if (tflag) { 2001 /* concatenated strings are illegal in traditional C */ 2002 warning(219); 2003 } 2004 $$ = $1; 2005 } 2006 | string2 T_STRING { 2007 $$ = cat_strings($1, $2); 2008 } 2009 ; 2010 2011 func_arg_list: 2012 expr %prec T_COMMA { 2013 $$ = new_function_argument_node(NULL, $1); 2014 } 2015 | func_arg_list T_COMMA expr { 2016 $$ = new_function_argument_node($1, $3); 2017 } 2018 ; 2019 2020 point_or_arrow: 2021 T_MEMBACC { 2022 symtyp = FMEMBER; 2023 $$ = $1; 2024 } 2025 ; 2026 2027 point: 2028 T_MEMBACC { 2029 if ($1 != POINT) { 2030 /* syntax error '%s' */ 2031 error(249, yytext); 2032 } 2033 } 2034 ; 2035 2036 identifier: /* C99 6.4.2.1 */ 2037 T_NAME { 2038 $$ = $1; 2039 cgram_debug("name '%s'", $$->sb_name); 2040 } 2041 | T_TYPENAME { 2042 $$ = $1; 2043 cgram_debug("typename '%s'", $$->sb_name); 2044 } 2045 ; 2046 2047 %% 2048 2049 /* ARGSUSED */ 2050 int 2051 yyerror(const char *msg) 2052 { 2053 /* syntax error '%s' */ 2054 error(249, yytext); 2055 if (++sytxerr >= 5) 2056 norecover(); 2057 return 0; 2058 } 2059 2060 static void 2061 cgram_declare(sym_t *decl, bool initflg, sbuf_t *renaming) 2062 { 2063 declare(decl, initflg, renaming); 2064 if (renaming != NULL) 2065 freeyyv(&renaming, T_NAME); 2066 } 2067 2068 /* 2069 * Discard all input tokens up to and including the next 2070 * unmatched right paren 2071 */ 2072 static void 2073 ignore_up_to_rparen(void) 2074 { 2075 int level; 2076 2077 if (yychar < 0) 2078 yychar = yylex(); 2079 freeyyv(&yylval, yychar); 2080 2081 level = 1; 2082 while (yychar != T_RPAREN || --level > 0) { 2083 if (yychar == T_LPAREN) { 2084 level++; 2085 } else if (yychar <= 0) { 2086 break; 2087 } 2088 freeyyv(&yylval, yychar = yylex()); 2089 } 2090 2091 yyclearin; 2092 } 2093 2094 static sym_t * 2095 symbolrename(sym_t *s, sbuf_t *sb) 2096 { 2097 if (sb) 2098 s->s_rename = sb->sb_name; 2099 return s; 2100 } 2101
Indexes created Tue Sep 30 11:09:46 GMT 2025