1 %{ 2 /* $NetBSD: cgram.y,v 1.49 2010/02/09 23:05:16 wiz 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 1.49 2010/02/09 23:05:16 wiz Exp $"); 39 #endif 40 41 #include <stdlib.h> 42 #include <string.h> 43 #include <limits.h> 44 45 #include "lint1.h" 46 47 extern char *yytext; 48 /* 49 * Contains the level of current declaration. 0 is extern. 50 * Used for symbol table entries. 51 */ 52 int blklev; 53 54 /* 55 * level for memory allocation. Normaly the same as blklev. 56 * An exception is the declaration of arguments in prototypes. Memory 57 * for these can't be freed after the declaration, but symbols must 58 * be removed from the symbol table after the declaration. 59 */ 60 int mblklev; 61 62 /* 63 * Save the no-warns state and restore it to avoid the problem where 64 * if (expr) { stmt } / * NOLINT * / stmt; 65 */ 66 static int onowarn = -1; 67 68 static int toicon(tnode_t *, int); 69 static void idecl(sym_t *, int, sbuf_t *); 70 static void ignuptorp(void); 71 72 #ifdef DEBUG 73 static inline void CLRWFLGS(const char *file, size_t line); 74 static inline void CLRWFLGS(const char *file, size_t line) 75 { 76 printf("%s, %d: clear flags %s %zu\n", curr_pos.p_file, 77 curr_pos.p_line, file, line); 78 clrwflgs(); 79 onowarn = -1; 80 } 81 82 static inline void SAVE(const char *file, size_t line); 83 static inline void SAVE(const char *file, size_t line) 84 { 85 if (onowarn != -1) 86 abort(); 87 printf("%s, %d: save flags %s %zu = %d\n", curr_pos.p_file, 88 curr_pos.p_line, file, line, nowarn); 89 onowarn = nowarn; 90 } 91 92 static inline void RESTORE(const char *file, size_t line); 93 static inline void RESTORE(const char *file, size_t line) 94 { 95 if (onowarn != -1) { 96 nowarn = onowarn; 97 printf("%s, %d: restore flags %s %zu = %d\n", curr_pos.p_file, 98 curr_pos.p_line, file, line, nowarn); 99 onowarn = -1; 100 } else 101 CLRWFLGS(file, line); 102 } 103 #else 104 #define CLRWFLGS(f, l) clrwflgs(), onowarn = -1 105 #define SAVE(f, l) onowarn = nowarn 106 #define RESTORE(f, l) (void)(onowarn == -1 ? (clrwflgs(), 0) : (nowarn = onowarn)) 107 #endif 108 %} 109 110 %expect 3 111 112 %union { 113 int y_int; 114 val_t *y_val; 115 sbuf_t *y_sb; 116 sym_t *y_sym; 117 op_t y_op; 118 scl_t y_scl; 119 tspec_t y_tspec; 120 tqual_t y_tqual; 121 type_t *y_type; 122 tnode_t *y_tnode; 123 range_t y_range; 124 strg_t *y_strg; 125 pqinf_t *y_pqinf; 126 }; 127 128 %token T_LBRACE T_RBRACE T_LBRACK T_RBRACK T_LPARN T_RPARN 129 %token <y_op> T_STROP 130 %token <y_op> T_UNOP 131 %token <y_op> T_INCDEC 132 %token T_SIZEOF 133 %token T_ALIGNOF 134 %token <y_op> T_MULT 135 %token <y_op> T_DIVOP 136 %token <y_op> T_ADDOP 137 %token <y_op> T_SHFTOP 138 %token <y_op> T_RELOP 139 %token <y_op> T_EQOP 140 %token <y_op> T_AND 141 %token <y_op> T_XOR 142 %token <y_op> T_OR 143 %token <y_op> T_LOGAND 144 %token <y_op> T_LOGOR 145 %token T_QUEST 146 %token T_COLON 147 %token <y_op> T_ASSIGN 148 %token <y_op> T_OPASS 149 %token T_COMMA 150 %token T_SEMI 151 %token T_ELLIPSE 152 %token T_REAL 153 %token T_IMAG 154 155 /* storage classes (extern, static, auto, register and typedef) */ 156 %token <y_scl> T_SCLASS 157 158 /* types (char, int, short, long, unsigned, signed, float, double, void) */ 159 %token <y_tspec> T_TYPE 160 161 /* qualifiers (const, volatile) */ 162 %token <y_tqual> T_QUAL 163 164 /* struct or union */ 165 %token <y_tspec> T_SOU 166 167 /* enum */ 168 %token T_ENUM 169 170 /* remaining keywords */ 171 %token T_CASE 172 %token T_DEFAULT 173 %token T_IF 174 %token T_ELSE 175 %token T_SWITCH 176 %token T_DO 177 %token T_WHILE 178 %token T_FOR 179 %token T_GOTO 180 %token T_CONTINUE 181 %token T_BREAK 182 %token T_RETURN 183 %token T_ASM 184 %token T_SYMBOLRENAME 185 %token T_PACKED 186 /* Type Attributes */ 187 %token <y_type> T_ATTRIBUTE 188 %token <y_type> T_AT_ALIGNED 189 %token <y_type> T_AT_DEPRECATED 190 %token <y_type> T_AT_MAY_ALIAS 191 %token <y_type> T_AT_PACKED 192 %token <y_type> T_AT_TUINION 193 %token <y_type> T_AT_TUNION 194 %token <y_type> T_AT_UNUSED 195 196 197 198 %left T_COMMA 199 %right T_ASSIGN T_OPASS 200 %right T_QUEST T_COLON 201 %left T_LOGOR 202 %left T_LOGAND 203 %left T_OR 204 %left T_XOR 205 %left T_AND 206 %left T_EQOP 207 %left T_RELOP 208 %left T_SHFTOP 209 %left T_ADDOP 210 %left T_MULT T_DIVOP 211 %right T_UNOP T_INCDEC T_SIZEOF T_ALIGNOF T_REAL T_IMAG 212 %left T_LPARN T_LBRACK T_STROP 213 214 %token <y_sb> T_NAME 215 %token <y_sb> T_TYPENAME 216 %token <y_val> T_CON 217 %token <y_strg> T_STRING 218 219 %type <y_sym> func_decl 220 %type <y_sym> notype_decl 221 %type <y_sym> type_decl 222 %type <y_type> typespec 223 %type <y_type> clrtyp_typespec 224 %type <y_type> notype_typespec 225 %type <y_type> struct_spec 226 %type <y_type> enum_spec 227 %type <y_type> type_attribute 228 %type <y_type> type_attribute_spec 229 %type <y_sym> struct_tag 230 %type <y_sym> enum_tag 231 %type <y_tspec> struct 232 %type <y_sym> struct_declaration 233 %type <y_sb> identifier 234 %type <y_sym> member_declaration_list_with_rbrace 235 %type <y_sym> member_declaration_list 236 %type <y_sym> member_declaration 237 %type <y_sym> notype_member_decls 238 %type <y_sym> type_member_decls 239 %type <y_sym> notype_member_decl 240 %type <y_sym> type_member_decl 241 %type <y_tnode> constant 242 %type <y_sym> enum_declaration 243 %type <y_sym> enums_with_opt_comma 244 %type <y_sym> enums 245 %type <y_sym> enumerator 246 %type <y_sym> ename 247 %type <y_sym> notype_direct_decl 248 %type <y_sym> type_direct_decl 249 %type <y_pqinf> pointer 250 %type <y_pqinf> asterisk 251 %type <y_sym> param_decl 252 %type <y_sym> param_list 253 %type <y_sym> abs_decl_param_list 254 %type <y_sym> direct_param_decl 255 %type <y_sym> notype_param_decl 256 %type <y_sym> direct_notype_param_decl 257 %type <y_pqinf> type_qualifier_list 258 %type <y_pqinf> type_qualifier 259 %type <y_sym> identifier_list 260 %type <y_sym> abs_decl 261 %type <y_sym> direct_abs_decl 262 %type <y_sym> vararg_parameter_type_list 263 %type <y_sym> parameter_type_list 264 %type <y_sym> parameter_declaration 265 %type <y_tnode> expr 266 %type <y_tnode> expr_stmnt_val 267 %type <y_tnode> expr_stmnt_list 268 %type <y_tnode> term 269 %type <y_tnode> func_arg_list 270 %type <y_op> point_or_arrow 271 %type <y_type> type_name 272 %type <y_sym> abstract_declaration 273 %type <y_tnode> do_while_expr 274 %type <y_tnode> opt_expr 275 %type <y_strg> string 276 %type <y_strg> string2 277 %type <y_sb> opt_asm_or_symbolrename 278 %type <y_range> range 279 %type <y_range> lorange 280 281 282 %% 283 284 program: 285 /* empty */ { 286 if (sflag) { 287 /* empty translation unit */ 288 error(272); 289 } else if (!tflag) { 290 /* empty translation unit */ 291 warning(272); 292 } 293 } 294 | translation_unit 295 ; 296 297 translation_unit: 298 ext_decl 299 | translation_unit ext_decl 300 ; 301 302 ext_decl: 303 asm_stmnt 304 | func_def { 305 glclup(0); 306 CLRWFLGS(__FILE__, __LINE__); 307 } 308 | data_def { 309 glclup(0); 310 CLRWFLGS(__FILE__, __LINE__); 311 } 312 ; 313 314 data_def: 315 T_SEMI { 316 if (sflag) { 317 /* syntax error: empty declaration */ 318 error(0); 319 } else if (!tflag) { 320 /* syntax error: empty declaration */ 321 warning(0); 322 } 323 } 324 | clrtyp deftyp notype_init_decls T_SEMI { 325 if (sflag) { 326 /* old style declaration; add "int" */ 327 error(1); 328 } else if (!tflag) { 329 /* old style declaration; add "int" */ 330 warning(1); 331 } 332 } 333 | declmods deftyp T_SEMI { 334 if (dcs->d_scl == TYPEDEF) { 335 /* typedef declares no type name */ 336 warning(72); 337 } else { 338 /* empty declaration */ 339 warning(2); 340 } 341 } 342 | declmods deftyp notype_init_decls T_SEMI 343 | declspecs deftyp T_SEMI { 344 if (dcs->d_scl == TYPEDEF) { 345 /* typedef declares no type name */ 346 warning(72); 347 } else if (!dcs->d_nedecl) { 348 /* empty declaration */ 349 warning(2); 350 } 351 } 352 | declspecs deftyp type_init_decls T_SEMI 353 | error T_SEMI { 354 globclup(); 355 } 356 | error T_RBRACE { 357 globclup(); 358 } 359 ; 360 361 func_def: 362 func_decl { 363 if ($1->s_type->t_tspec != FUNC) { 364 /* syntax error */ 365 error(249, yytext); 366 YYERROR; 367 } 368 if ($1->s_type->t_typedef) { 369 /* ()-less function definition */ 370 error(64); 371 YYERROR; 372 } 373 funcdef($1); 374 blklev++; 375 pushdecl(ARG); 376 if (nowarn) 377 $1->s_used = 1; 378 } opt_arg_declaration_list { 379 popdecl(); 380 blklev--; 381 cluparg(); 382 pushctrl(0); 383 } comp_stmnt { 384 funcend(); 385 popctrl(0); 386 } 387 ; 388 389 func_decl: 390 clrtyp deftyp notype_decl { 391 $$ = $3; 392 } 393 | declmods deftyp notype_decl { 394 $$ = $3; 395 } 396 | declspecs deftyp type_decl { 397 $$ = $3; 398 } 399 ; 400 401 opt_arg_declaration_list: 402 /* empty */ 403 | arg_declaration_list 404 ; 405 406 arg_declaration_list: 407 arg_declaration 408 | arg_declaration_list arg_declaration 409 /* XXX or better "arg_declaration error" ? */ 410 | error 411 ; 412 413 /* 414 * "arg_declaration" is separated from "declaration" because it 415 * needs other error handling. 416 */ 417 418 arg_declaration: 419 declmods deftyp T_SEMI { 420 /* empty declaration */ 421 warning(2); 422 } 423 | declmods deftyp notype_init_decls T_SEMI 424 | declspecs deftyp T_SEMI { 425 if (!dcs->d_nedecl) { 426 /* empty declaration */ 427 warning(2); 428 } else { 429 tspec_t ts = dcs->d_type->t_tspec; 430 /* %s declared in argument declaration list */ 431 warning(3, ts == STRUCT ? "struct" : 432 (ts == UNION ? "union" : "enum")); 433 } 434 } 435 | declspecs deftyp type_init_decls T_SEMI { 436 if (dcs->d_nedecl) { 437 tspec_t ts = dcs->d_type->t_tspec; 438 /* %s declared in argument declaration list */ 439 warning(3, ts == STRUCT ? "struct" : 440 (ts == UNION ? "union" : "enum")); 441 } 442 } 443 | declmods error 444 | declspecs error 445 ; 446 447 declaration: 448 declmods deftyp T_SEMI { 449 if (dcs->d_scl == TYPEDEF) { 450 /* typedef declares no type name */ 451 warning(72); 452 } else { 453 /* empty declaration */ 454 warning(2); 455 } 456 } 457 | declmods deftyp notype_init_decls T_SEMI 458 | declspecs deftyp T_SEMI { 459 if (dcs->d_scl == TYPEDEF) { 460 /* typedef declares no type name */ 461 warning(72); 462 } else if (!dcs->d_nedecl) { 463 /* empty declaration */ 464 warning(2); 465 } 466 } 467 | declspecs deftyp type_init_decls T_SEMI 468 | error T_SEMI 469 ; 470 471 type_attribute_spec: 472 T_AT_DEPRECATED 473 | T_AT_ALIGNED T_LPARN constant T_RPARN 474 | T_AT_MAY_ALIAS 475 | T_AT_PACKED { 476 addpacked(); 477 } 478 | T_AT_TUNION 479 | T_AT_UNUSED 480 ; 481 482 type_attribute: 483 T_ATTRIBUTE T_LPARN T_LPARN type_attribute_spec T_RPARN T_RPARN 484 | T_PACKED { 485 addpacked(); 486 } 487 ; 488 489 clrtyp: 490 { 491 clrtyp(); 492 } 493 ; 494 495 deftyp: 496 /* empty */ { 497 deftyp(); 498 } 499 ; 500 501 declspecs: 502 clrtyp_typespec { 503 addtype($1); 504 } 505 | declmods typespec { 506 addtype($2); 507 } 508 | declspecs type_attribute 509 | declspecs declmod 510 | declspecs notype_typespec { 511 addtype($2); 512 } 513 ; 514 515 declmods: 516 clrtyp T_QUAL { 517 addqual($2); 518 } 519 | clrtyp T_SCLASS { 520 addscl($2); 521 } 522 | declmods declmod 523 ; 524 525 declmod: 526 T_QUAL { 527 addqual($1); 528 } 529 | T_SCLASS { 530 addscl($1); 531 } 532 ; 533 534 clrtyp_typespec: 535 clrtyp notype_typespec { 536 $$ = $2; 537 } 538 | T_TYPENAME clrtyp { 539 $$ = getsym($1)->s_type; 540 } 541 ; 542 543 typespec: 544 notype_typespec { 545 $$ = $1; 546 } 547 | T_TYPENAME { 548 $$ = getsym($1)->s_type; 549 } 550 ; 551 552 notype_typespec: 553 T_TYPE { 554 $$ = gettyp($1); 555 } 556 | struct_spec { 557 popdecl(); 558 $$ = $1; 559 } 560 | enum_spec { 561 popdecl(); 562 $$ = $1; 563 } 564 ; 565 566 struct_spec: 567 struct struct_tag { 568 /* 569 * STDC requires that "struct a;" always introduces 570 * a new tag if "a" is not declared at current level 571 * 572 * yychar is valid because otherwise the parser would 573 * not been able to deceide if he must shift or reduce 574 */ 575 $$ = mktag($2, $1, 0, yychar == T_SEMI); 576 } 577 | struct struct_tag { 578 dcs->d_tagtyp = mktag($2, $1, 1, 0); 579 } struct_declaration { 580 $$ = compltag(dcs->d_tagtyp, $4); 581 } 582 | struct { 583 dcs->d_tagtyp = mktag(NULL, $1, 1, 0); 584 } struct_declaration { 585 $$ = compltag(dcs->d_tagtyp, $3); 586 } 587 | struct error { 588 symtyp = FVFT; 589 $$ = gettyp(INT); 590 } 591 ; 592 593 struct: 594 struct type_attribute 595 | T_SOU { 596 symtyp = FTAG; 597 pushdecl($1 == STRUCT ? MOS : MOU); 598 dcs->d_offset = 0; 599 dcs->d_stralign = CHAR_BIT; 600 $$ = $1; 601 } 602 ; 603 604 struct_tag: 605 identifier { 606 $$ = getsym($1); 607 } 608 ; 609 610 struct_declaration: 611 struct_decl_lbrace member_declaration_list_with_rbrace { 612 $$ = $2; 613 } 614 ; 615 616 struct_decl_lbrace: 617 T_LBRACE { 618 symtyp = FVFT; 619 } 620 ; 621 622 member_declaration_list_with_rbrace: 623 member_declaration_list T_SEMI T_RBRACE { 624 $$ = $1; 625 } 626 | member_declaration_list T_RBRACE { 627 if (sflag) { 628 /* syntax req. ";" after last struct/union member */ 629 error(66); 630 } else { 631 /* syntax req. ";" after last struct/union member */ 632 warning(66); 633 } 634 $$ = $1; 635 } 636 | T_RBRACE { 637 $$ = NULL; 638 } 639 ; 640 641 member_declaration_list: 642 member_declaration { 643 $$ = $1; 644 } 645 | member_declaration_list T_SEMI member_declaration { 646 $$ = lnklst($1, $3); 647 } 648 ; 649 650 member_declaration: 651 noclass_declmods deftyp { 652 /* too late, i know, but getsym() compensates it */ 653 symtyp = FMOS; 654 } notype_member_decls { 655 symtyp = FVFT; 656 $$ = $4; 657 } 658 | noclass_declspecs deftyp { 659 symtyp = FMOS; 660 } type_member_decls { 661 symtyp = FVFT; 662 $$ = $4; 663 } 664 | noclass_declmods deftyp { 665 /* struct or union member must be named */ 666 warning(49); 667 $$ = NULL; 668 } 669 | noclass_declspecs deftyp { 670 /* struct or union member must be named */ 671 warning(49); 672 $$ = NULL; 673 } 674 | error { 675 symtyp = FVFT; 676 $$ = NULL; 677 } 678 ; 679 680 noclass_declspecs: 681 clrtyp_typespec { 682 addtype($1); 683 } 684 | noclass_declmods typespec { 685 addtype($2); 686 } 687 | noclass_declspecs T_QUAL { 688 addqual($2); 689 } 690 | noclass_declspecs notype_typespec { 691 addtype($2); 692 } 693 | noclass_declspecs type_attribute 694 ; 695 696 noclass_declmods: 697 clrtyp T_QUAL { 698 addqual($2); 699 } 700 | noclass_declmods T_QUAL { 701 addqual($2); 702 } 703 ; 704 705 notype_member_decls: 706 notype_member_decl { 707 $$ = decl1str($1); 708 } 709 | notype_member_decls { 710 symtyp = FMOS; 711 } T_COMMA type_member_decl { 712 $$ = lnklst($1, decl1str($4)); 713 } 714 ; 715 716 type_member_decls: 717 type_member_decl { 718 $$ = decl1str($1); 719 } 720 | type_member_decls { 721 symtyp = FMOS; 722 } T_COMMA type_member_decl { 723 $$ = lnklst($1, decl1str($4)); 724 } 725 ; 726 727 notype_member_decl: 728 notype_decl { 729 $$ = $1; 730 } 731 | notype_decl T_COLON constant { 732 $$ = bitfield($1, toicon($3, 1)); 733 } 734 | { 735 symtyp = FVFT; 736 } T_COLON constant { 737 $$ = bitfield(NULL, toicon($3, 1)); 738 } 739 ; 740 741 type_member_decl: 742 type_decl { 743 $$ = $1; 744 } 745 | type_decl T_COLON constant { 746 $$ = bitfield($1, toicon($3, 1)); 747 } 748 | { 749 symtyp = FVFT; 750 } T_COLON constant { 751 $$ = bitfield(NULL, toicon($3, 1)); 752 } 753 ; 754 755 enum_spec: 756 enum enum_tag { 757 $$ = mktag($2, ENUM, 0, 0); 758 } 759 | enum enum_tag { 760 dcs->d_tagtyp = mktag($2, ENUM, 1, 0); 761 } enum_declaration { 762 $$ = compltag(dcs->d_tagtyp, $4); 763 } 764 | enum { 765 dcs->d_tagtyp = mktag(NULL, ENUM, 1, 0); 766 } enum_declaration { 767 $$ = compltag(dcs->d_tagtyp, $3); 768 } 769 | enum error { 770 symtyp = FVFT; 771 $$ = gettyp(INT); 772 } 773 ; 774 775 enum: 776 T_ENUM { 777 symtyp = FTAG; 778 pushdecl(ENUMCON); 779 } 780 ; 781 782 enum_tag: 783 identifier { 784 $$ = getsym($1); 785 } 786 ; 787 788 enum_declaration: 789 enum_decl_lbrace enums_with_opt_comma T_RBRACE { 790 $$ = $2; 791 } 792 ; 793 794 enum_decl_lbrace: 795 T_LBRACE { 796 symtyp = FVFT; 797 enumval = 0; 798 } 799 ; 800 801 enums_with_opt_comma: 802 enums { 803 $$ = $1; 804 } 805 | enums T_COMMA { 806 if (sflag) { 807 /* trailing "," prohibited in enum declaration */ 808 error(54); 809 } else { 810 /* trailing "," prohibited in enum declaration */ 811 (void)gnuism(54); 812 } 813 $$ = $1; 814 } 815 ; 816 817 enums: 818 enumerator { 819 $$ = $1; 820 } 821 | enums T_COMMA enumerator { 822 $$ = lnklst($1, $3); 823 } 824 | error { 825 $$ = NULL; 826 } 827 ; 828 829 enumerator: 830 ename { 831 $$ = ename($1, enumval, 1); 832 } 833 | ename T_ASSIGN constant { 834 $$ = ename($1, toicon($3, 1), 0); 835 } 836 ; 837 838 ename: 839 identifier { 840 $$ = getsym($1); 841 } 842 ; 843 844 845 notype_init_decls: 846 notype_init_decl 847 | notype_init_decls T_COMMA type_init_decl 848 ; 849 850 type_init_decls: 851 type_init_decl 852 | type_init_decls T_COMMA type_init_decl 853 ; 854 855 notype_init_decl: 856 notype_decl opt_asm_or_symbolrename { 857 idecl($1, 0, $2); 858 chksz($1); 859 } 860 | notype_decl opt_asm_or_symbolrename { 861 idecl($1, 1, $2); 862 } T_ASSIGN initializer { 863 chksz($1); 864 } 865 ; 866 867 type_init_decl: 868 type_decl opt_asm_or_symbolrename { 869 idecl($1, 0, $2); 870 chksz($1); 871 } 872 | type_decl opt_asm_or_symbolrename { 873 idecl($1, 1, $2); 874 } T_ASSIGN initializer { 875 chksz($1); 876 } 877 ; 878 879 notype_decl: 880 notype_direct_decl { 881 $$ = $1; 882 } 883 | pointer notype_direct_decl { 884 $$ = addptr($2, $1); 885 } 886 ; 887 888 notype_direct_decl: 889 T_NAME { 890 $$ = dname(getsym($1)); 891 } 892 | T_LPARN type_decl T_RPARN { 893 $$ = $2; 894 } 895 | notype_direct_decl T_LBRACK T_RBRACK { 896 $$ = addarray($1, 0, 0); 897 } 898 | notype_direct_decl T_LBRACK constant T_RBRACK { 899 $$ = addarray($1, 1, toicon($3, 0)); 900 } 901 | notype_direct_decl param_list { 902 $$ = addfunc($1, $2); 903 popdecl(); 904 blklev--; 905 } 906 | notype_direct_decl type_attribute 907 ; 908 909 type_decl: 910 type_direct_decl { 911 $$ = $1; 912 } 913 | pointer type_direct_decl { 914 $$ = addptr($2, $1); 915 } 916 ; 917 918 type_direct_decl: 919 identifier { 920 $$ = dname(getsym($1)); 921 } 922 | T_LPARN type_decl T_RPARN { 923 $$ = $2; 924 } 925 | type_direct_decl T_LBRACK T_RBRACK { 926 $$ = addarray($1, 0, 0); 927 } 928 | type_direct_decl T_LBRACK constant T_RBRACK { 929 $$ = addarray($1, 1, toicon($3, 0)); 930 } 931 | type_direct_decl param_list { 932 $$ = addfunc($1, $2); 933 popdecl(); 934 blklev--; 935 } 936 | type_direct_decl type_attribute 937 ; 938 939 /* 940 * param_decl and notype_param_decl exist to avoid a conflict in 941 * argument lists. A typename enclosed in parens should always be 942 * treated as a typename, not an argument. 943 * "typedef int a; f(int (a));" is "typedef int a; f(int foo(a));" 944 * not "typedef int a; f(int a);" 945 */ 946 param_decl: 947 direct_param_decl { 948 $$ = $1; 949 } 950 | pointer direct_param_decl { 951 $$ = addptr($2, $1); 952 } 953 ; 954 955 direct_param_decl: 956 identifier { 957 $$ = dname(getsym($1)); 958 } 959 | T_LPARN notype_param_decl T_RPARN { 960 $$ = $2; 961 } 962 | direct_param_decl T_LBRACK T_RBRACK { 963 $$ = addarray($1, 0, 0); 964 } 965 | direct_param_decl T_LBRACK constant T_RBRACK { 966 $$ = addarray($1, 1, toicon($3, 0)); 967 } 968 | direct_param_decl param_list { 969 $$ = addfunc($1, $2); 970 popdecl(); 971 blklev--; 972 } 973 ; 974 975 notype_param_decl: 976 direct_notype_param_decl { 977 $$ = $1; 978 } 979 | pointer direct_notype_param_decl { 980 $$ = addptr($2, $1); 981 } 982 ; 983 984 direct_notype_param_decl: 985 T_NAME { 986 $$ = dname(getsym($1)); 987 } 988 | T_LPARN notype_param_decl T_RPARN { 989 $$ = $2; 990 } 991 | direct_notype_param_decl T_LBRACK T_RBRACK { 992 $$ = addarray($1, 0, 0); 993 } 994 | direct_notype_param_decl T_LBRACK constant T_RBRACK { 995 $$ = addarray($1, 1, toicon($3, 0)); 996 } 997 | direct_notype_param_decl param_list { 998 $$ = addfunc($1, $2); 999 popdecl(); 1000 blklev--; 1001 } 1002 ; 1003 1004 pointer: 1005 asterisk { 1006 $$ = $1; 1007 } 1008 | asterisk type_qualifier_list { 1009 $$ = mergepq($1, $2); 1010 } 1011 | asterisk pointer { 1012 $$ = mergepq($1, $2); 1013 } 1014 | asterisk type_qualifier_list pointer { 1015 $$ = mergepq(mergepq($1, $2), $3); 1016 } 1017 ; 1018 1019 asterisk: 1020 T_MULT { 1021 $$ = xcalloc(1, sizeof (pqinf_t)); 1022 $$->p_pcnt = 1; 1023 } 1024 ; 1025 1026 type_qualifier_list: 1027 type_qualifier { 1028 $$ = $1; 1029 } 1030 | type_qualifier_list type_qualifier { 1031 $$ = mergepq($1, $2); 1032 } 1033 ; 1034 1035 type_qualifier: 1036 T_QUAL { 1037 $$ = xcalloc(1, sizeof (pqinf_t)); 1038 if ($1 == CONST) { 1039 $$->p_const = 1; 1040 } else { 1041 $$->p_volatile = 1; 1042 } 1043 } 1044 ; 1045 1046 param_list: 1047 id_list_lparn identifier_list T_RPARN { 1048 $$ = $2; 1049 } 1050 | abs_decl_param_list { 1051 $$ = $1; 1052 } 1053 ; 1054 1055 id_list_lparn: 1056 T_LPARN { 1057 blklev++; 1058 pushdecl(PARG); 1059 } 1060 ; 1061 1062 identifier_list: 1063 T_NAME { 1064 $$ = iname(getsym($1)); 1065 } 1066 | identifier_list T_COMMA T_NAME { 1067 $$ = lnklst($1, iname(getsym($3))); 1068 } 1069 | identifier_list error { 1070 $$ = $1; 1071 } 1072 ; 1073 1074 abs_decl_param_list: 1075 abs_decl_lparn T_RPARN { 1076 $$ = NULL; 1077 } 1078 | abs_decl_lparn vararg_parameter_type_list T_RPARN { 1079 dcs->d_proto = 1; 1080 $$ = $2; 1081 } 1082 | abs_decl_lparn error T_RPARN { 1083 $$ = NULL; 1084 } 1085 ; 1086 1087 abs_decl_lparn: 1088 T_LPARN { 1089 blklev++; 1090 pushdecl(PARG); 1091 } 1092 ; 1093 1094 vararg_parameter_type_list: 1095 parameter_type_list { 1096 $$ = $1; 1097 } 1098 | parameter_type_list T_COMMA T_ELLIPSE { 1099 dcs->d_vararg = 1; 1100 $$ = $1; 1101 } 1102 | T_ELLIPSE { 1103 if (sflag) { 1104 /* ANSI C requires formal parameter before "..." */ 1105 error(84); 1106 } else if (!tflag) { 1107 /* ANSI C requires formal parameter before "..." */ 1108 warning(84); 1109 } 1110 dcs->d_vararg = 1; 1111 $$ = NULL; 1112 } 1113 ; 1114 1115 parameter_type_list: 1116 parameter_declaration { 1117 $$ = $1; 1118 } 1119 | parameter_type_list T_COMMA parameter_declaration { 1120 $$ = lnklst($1, $3); 1121 } 1122 ; 1123 1124 parameter_declaration: 1125 declmods deftyp { 1126 $$ = decl1arg(aname(), 0); 1127 } 1128 | declspecs deftyp { 1129 $$ = decl1arg(aname(), 0); 1130 } 1131 | declmods deftyp notype_param_decl { 1132 $$ = decl1arg($3, 0); 1133 } 1134 /* 1135 * param_decl is needed because of following conflict: 1136 * "typedef int a; f(int (a));" could be parsed as 1137 * "function with argument a of type int", or 1138 * "function with an abstract argument of type function". 1139 * This grammar realizes the second case. 1140 */ 1141 | declspecs deftyp param_decl { 1142 $$ = decl1arg($3, 0); 1143 } 1144 | declmods deftyp abs_decl { 1145 $$ = decl1arg($3, 0); 1146 } 1147 | declspecs deftyp abs_decl { 1148 $$ = decl1arg($3, 0); 1149 } 1150 ; 1151 1152 opt_asm_or_symbolrename: /* expect only one */ 1153 /* empty */ { 1154 $$ = NULL; 1155 } 1156 | T_ASM T_LPARN T_STRING T_RPARN { 1157 freeyyv(&$3, T_STRING); 1158 $$ = NULL; 1159 } 1160 | T_SYMBOLRENAME T_LPARN T_NAME T_RPARN { 1161 $$ = $3; 1162 } 1163 ; 1164 1165 initializer: 1166 init_expr 1167 ; 1168 1169 init_expr: 1170 expr %prec T_COMMA { 1171 mkinit($1); 1172 } 1173 | init_by_name init_expr %prec T_COMMA 1174 | init_lbrace init_expr_list init_rbrace 1175 | init_lbrace init_expr_list T_COMMA init_rbrace 1176 | error 1177 ; 1178 1179 init_expr_list: 1180 init_expr %prec T_COMMA 1181 | init_expr_list T_COMMA init_expr 1182 ; 1183 1184 lorange: 1185 constant T_ELLIPSE { 1186 $$.lo = toicon($1, 1); 1187 } 1188 ; 1189 range: 1190 constant { 1191 $$.lo = toicon($1, 1); 1192 $$.hi = $$.lo + 1; 1193 } 1194 | lorange constant { 1195 $$.lo = $1.lo; 1196 $$.hi = toicon($2, 1); 1197 } 1198 ; 1199 1200 init_by_name: 1201 T_LBRACK range T_RBRACK T_ASSIGN { 1202 if (!Sflag) 1203 warning(321); 1204 } 1205 | point identifier T_ASSIGN { 1206 if (!Sflag) 1207 warning(313); 1208 memberpush($2); 1209 } 1210 | identifier T_COLON { 1211 gnuism(315); 1212 memberpush($1); 1213 } 1214 ; 1215 1216 init_lbrace: 1217 T_LBRACE { 1218 initlbr(); 1219 } 1220 ; 1221 1222 init_rbrace: 1223 T_RBRACE { 1224 initrbr(); 1225 } 1226 ; 1227 1228 type_name: 1229 { 1230 pushdecl(ABSTRACT); 1231 } abstract_declaration { 1232 popdecl(); 1233 $$ = $2->s_type; 1234 } 1235 ; 1236 1237 abstract_declaration: 1238 noclass_declmods deftyp { 1239 $$ = decl1abs(aname()); 1240 } 1241 | noclass_declspecs deftyp { 1242 $$ = decl1abs(aname()); 1243 } 1244 | noclass_declmods deftyp abs_decl { 1245 $$ = decl1abs($3); 1246 } 1247 | noclass_declspecs deftyp abs_decl { 1248 $$ = decl1abs($3); 1249 } 1250 ; 1251 1252 abs_decl: 1253 pointer { 1254 $$ = addptr(aname(), $1); 1255 } 1256 | direct_abs_decl { 1257 $$ = $1; 1258 } 1259 | pointer direct_abs_decl { 1260 $$ = addptr($2, $1); 1261 } 1262 ; 1263 1264 direct_abs_decl: 1265 T_LPARN abs_decl T_RPARN { 1266 $$ = $2; 1267 } 1268 | T_LBRACK T_RBRACK { 1269 $$ = addarray(aname(), 0, 0); 1270 } 1271 | T_LBRACK constant T_RBRACK { 1272 $$ = addarray(aname(), 1, toicon($2, 0)); 1273 } 1274 | direct_abs_decl T_LBRACK T_RBRACK { 1275 $$ = addarray($1, 0, 0); 1276 } 1277 | direct_abs_decl T_LBRACK constant T_RBRACK { 1278 $$ = addarray($1, 1, toicon($3, 0)); 1279 } 1280 | abs_decl_param_list { 1281 $$ = addfunc(aname(), $1); 1282 popdecl(); 1283 blklev--; 1284 } 1285 | direct_abs_decl abs_decl_param_list { 1286 $$ = addfunc($1, $2); 1287 popdecl(); 1288 blklev--; 1289 } 1290 | direct_abs_decl type_attribute 1291 ; 1292 1293 non_expr_stmnt: 1294 labeled_stmnt 1295 | comp_stmnt 1296 | selection_stmnt 1297 | iteration_stmnt 1298 | jump_stmnt { 1299 ftflg = 0; 1300 } 1301 | asm_stmnt 1302 1303 stmnt: 1304 expr_stmnt 1305 | non_expr_stmnt 1306 ; 1307 1308 labeled_stmnt: 1309 label stmnt 1310 ; 1311 1312 label: 1313 identifier T_COLON { 1314 symtyp = FLAB; 1315 label(T_NAME, getsym($1), NULL); 1316 } 1317 | T_CASE constant T_COLON { 1318 label(T_CASE, NULL, $2); 1319 ftflg = 1; 1320 } 1321 | T_CASE constant T_ELLIPSE constant T_COLON { 1322 /* XXX: We don't fill all cases */ 1323 label(T_CASE, NULL, $2); 1324 ftflg = 1; 1325 } 1326 | T_DEFAULT T_COLON { 1327 label(T_DEFAULT, NULL, NULL); 1328 ftflg = 1; 1329 } 1330 ; 1331 1332 comp_stmnt: 1333 comp_stmnt_lbrace declaration_list opt_stmnt_list comp_stmnt_rbrace 1334 | comp_stmnt_lbrace opt_stmnt_list comp_stmnt_rbrace 1335 ; 1336 1337 comp_stmnt_lbrace: 1338 T_LBRACE { 1339 blklev++; 1340 mblklev++; 1341 pushdecl(AUTO); 1342 } 1343 ; 1344 1345 comp_stmnt_rbrace: 1346 T_RBRACE { 1347 popdecl(); 1348 freeblk(); 1349 mblklev--; 1350 blklev--; 1351 ftflg = 0; 1352 } 1353 ; 1354 1355 opt_stmnt_list: 1356 /* empty */ 1357 | stmnt_list 1358 ; 1359 1360 stmnt_list: 1361 stmnt 1362 | stmnt_list stmnt { 1363 RESTORE(__FILE__, __LINE__); 1364 } 1365 | stmnt_list error T_SEMI 1366 ; 1367 1368 expr_stmnt: 1369 expr T_SEMI { 1370 expr($1, 0, 0, 1); 1371 ftflg = 0; 1372 } 1373 | T_SEMI { 1374 ftflg = 0; 1375 } 1376 ; 1377 1378 /* 1379 * The following two productions are used to implement 1380 * ({ [[decl-list] stmt-list] }). 1381 * XXX: This is not well tested. 1382 */ 1383 expr_stmnt_val: 1384 expr T_SEMI { 1385 /* XXX: We should really do that only on the last name */ 1386 if ($1->tn_op == NAME) 1387 $1->tn_sym->s_used = 1; 1388 $$ = $1; 1389 expr($1, 0, 0, 0); 1390 ftflg = 0; 1391 } 1392 | non_expr_stmnt { 1393 $$ = getnode(); 1394 $$->tn_type = gettyp(VOID); 1395 } 1396 ; 1397 1398 expr_stmnt_list: 1399 expr_stmnt_val 1400 | expr_stmnt_list expr_stmnt_val { 1401 $$ = $2; 1402 } 1403 ; 1404 1405 selection_stmnt: 1406 if_without_else { 1407 SAVE(__FILE__, __LINE__); 1408 if2(); 1409 if3(0); 1410 } 1411 | if_without_else T_ELSE { 1412 SAVE(__FILE__, __LINE__); 1413 if2(); 1414 } stmnt { 1415 CLRWFLGS(__FILE__, __LINE__); 1416 if3(1); 1417 } 1418 | if_without_else T_ELSE error { 1419 CLRWFLGS(__FILE__, __LINE__); 1420 if3(0); 1421 } 1422 | switch_expr stmnt { 1423 CLRWFLGS(__FILE__, __LINE__); 1424 switch2(); 1425 } 1426 | switch_expr error { 1427 CLRWFLGS(__FILE__, __LINE__); 1428 switch2(); 1429 } 1430 ; 1431 1432 if_without_else: 1433 if_expr stmnt 1434 | if_expr error 1435 ; 1436 1437 if_expr: 1438 T_IF T_LPARN expr T_RPARN { 1439 if1($3); 1440 CLRWFLGS(__FILE__, __LINE__); 1441 } 1442 ; 1443 1444 switch_expr: 1445 T_SWITCH T_LPARN expr T_RPARN { 1446 switch1($3); 1447 CLRWFLGS(__FILE__, __LINE__); 1448 } 1449 ; 1450 1451 do_stmnt: 1452 do stmnt { 1453 CLRWFLGS(__FILE__, __LINE__); 1454 } 1455 ; 1456 1457 iteration_stmnt: 1458 while_expr stmnt { 1459 CLRWFLGS(__FILE__, __LINE__); 1460 while2(); 1461 } 1462 | while_expr error { 1463 CLRWFLGS(__FILE__, __LINE__); 1464 while2(); 1465 } 1466 | do_stmnt do_while_expr { 1467 do2($2); 1468 ftflg = 0; 1469 } 1470 | do error { 1471 CLRWFLGS(__FILE__, __LINE__); 1472 do2(NULL); 1473 } 1474 | for_exprs stmnt { 1475 CLRWFLGS(__FILE__, __LINE__); 1476 for2(); 1477 } 1478 | for_exprs error { 1479 CLRWFLGS(__FILE__, __LINE__); 1480 for2(); 1481 } 1482 ; 1483 1484 while_expr: 1485 T_WHILE T_LPARN expr T_RPARN { 1486 while1($3); 1487 CLRWFLGS(__FILE__, __LINE__); 1488 } 1489 ; 1490 1491 do: 1492 T_DO { 1493 do1(); 1494 } 1495 ; 1496 1497 do_while_expr: 1498 T_WHILE T_LPARN expr T_RPARN T_SEMI { 1499 $$ = $3; 1500 } 1501 ; 1502 1503 for_exprs: 1504 T_FOR T_LPARN declspecs deftyp notype_init_decls T_SEMI opt_expr 1505 T_SEMI opt_expr T_RPARN { 1506 c99ism(325); 1507 for1(NULL, $7, $9); 1508 CLRWFLGS(__FILE__, __LINE__); 1509 } 1510 | T_FOR T_LPARN opt_expr T_SEMI opt_expr T_SEMI opt_expr T_RPARN { 1511 for1($3, $5, $7); 1512 CLRWFLGS(__FILE__, __LINE__); 1513 } 1514 ; 1515 1516 opt_expr: 1517 /* empty */ { 1518 $$ = NULL; 1519 } 1520 | expr { 1521 $$ = $1; 1522 } 1523 ; 1524 1525 jump_stmnt: 1526 goto identifier T_SEMI { 1527 dogoto(getsym($2)); 1528 } 1529 | goto error T_SEMI { 1530 symtyp = FVFT; 1531 } 1532 | T_CONTINUE T_SEMI { 1533 docont(); 1534 } 1535 | T_BREAK T_SEMI { 1536 dobreak(); 1537 } 1538 | T_RETURN T_SEMI { 1539 doreturn(NULL); 1540 } 1541 | T_RETURN expr T_SEMI { 1542 doreturn($2); 1543 } 1544 ; 1545 1546 goto: 1547 T_GOTO { 1548 symtyp = FLAB; 1549 } 1550 ; 1551 1552 asm_stmnt: 1553 T_ASM T_LPARN read_until_rparn T_SEMI { 1554 setasm(); 1555 } 1556 | T_ASM T_QUAL T_LPARN read_until_rparn T_SEMI { 1557 setasm(); 1558 } 1559 | T_ASM error 1560 ; 1561 1562 read_until_rparn: 1563 /* empty */ { 1564 ignuptorp(); 1565 } 1566 ; 1567 1568 declaration_list: 1569 declaration { 1570 CLRWFLGS(__FILE__, __LINE__); 1571 } 1572 | declaration_list declaration { 1573 CLRWFLGS(__FILE__, __LINE__); 1574 } 1575 ; 1576 1577 constant: 1578 expr %prec T_COMMA { 1579 $$ = $1; 1580 } 1581 ; 1582 1583 expr: 1584 expr T_MULT expr { 1585 $$ = build(MULT, $1, $3); 1586 } 1587 | expr T_DIVOP expr { 1588 $$ = build($2, $1, $3); 1589 } 1590 | expr T_ADDOP expr { 1591 $$ = build($2, $1, $3); 1592 } 1593 | expr T_SHFTOP expr { 1594 $$ = build($2, $1, $3); 1595 } 1596 | expr T_RELOP expr { 1597 $$ = build($2, $1, $3); 1598 } 1599 | expr T_EQOP expr { 1600 $$ = build($2, $1, $3); 1601 } 1602 | expr T_AND expr { 1603 $$ = build(AND, $1, $3); 1604 } 1605 | expr T_XOR expr { 1606 $$ = build(XOR, $1, $3); 1607 } 1608 | expr T_OR expr { 1609 $$ = build(OR, $1, $3); 1610 } 1611 | expr T_LOGAND expr { 1612 $$ = build(LOGAND, $1, $3); 1613 } 1614 | expr T_LOGOR expr { 1615 $$ = build(LOGOR, $1, $3); 1616 } 1617 | expr T_QUEST expr T_COLON expr { 1618 $$ = build(QUEST, $1, build(COLON, $3, $5)); 1619 } 1620 | expr T_ASSIGN expr { 1621 $$ = build(ASSIGN, $1, $3); 1622 } 1623 | expr T_OPASS expr { 1624 $$ = build($2, $1, $3); 1625 } 1626 | expr T_COMMA expr { 1627 $$ = build(COMMA, $1, $3); 1628 } 1629 | term { 1630 $$ = $1; 1631 } 1632 ; 1633 1634 term: 1635 T_NAME { 1636 /* XXX really necessary? */ 1637 if (yychar < 0) 1638 yychar = yylex(); 1639 $$ = getnnode(getsym($1), yychar); 1640 } 1641 | string { 1642 $$ = getsnode($1); 1643 } 1644 | T_CON { 1645 $$ = getcnode(gettyp($1->v_tspec), $1); 1646 } 1647 | T_LPARN expr T_RPARN { 1648 if ($2 != NULL) 1649 $2->tn_parn = 1; 1650 $$ = $2; 1651 } 1652 | T_LPARN comp_stmnt_lbrace declaration_list expr_stmnt_list { 1653 blklev--; 1654 mblklev--; 1655 initsym = mktempsym(duptyp($4->tn_type)); 1656 mblklev++; 1657 blklev++; 1658 gnuism(320); 1659 } comp_stmnt_rbrace T_RPARN { 1660 $$ = getnnode(initsym, 0); 1661 } 1662 | T_LPARN comp_stmnt_lbrace expr_stmnt_list { 1663 blklev--; 1664 mblklev--; 1665 initsym = mktempsym($3->tn_type); 1666 mblklev++; 1667 blklev++; 1668 gnuism(320); 1669 } comp_stmnt_rbrace T_RPARN { 1670 $$ = getnnode(initsym, 0); 1671 } 1672 | term T_INCDEC { 1673 $$ = build($2 == INC ? INCAFT : DECAFT, $1, NULL); 1674 } 1675 | T_INCDEC term { 1676 $$ = build($1 == INC ? INCBEF : DECBEF, $2, NULL); 1677 } 1678 | T_MULT term { 1679 $$ = build(STAR, $2, NULL); 1680 } 1681 | T_AND term { 1682 $$ = build(AMPER, $2, NULL); 1683 } 1684 | T_UNOP term { 1685 $$ = build($1, $2, NULL); 1686 } 1687 | T_ADDOP term { 1688 if (tflag && $1 == PLUS) { 1689 /* unary + is illegal in traditional C */ 1690 warning(100); 1691 } 1692 $$ = build($1 == PLUS ? UPLUS : UMINUS, $2, NULL); 1693 } 1694 | term T_LBRACK expr T_RBRACK { 1695 $$ = build(STAR, build(PLUS, $1, $3), NULL); 1696 } 1697 | term T_LPARN T_RPARN { 1698 $$ = funccall($1, NULL); 1699 } 1700 | term T_LPARN func_arg_list T_RPARN { 1701 $$ = funccall($1, $3); 1702 } 1703 | term point_or_arrow T_NAME { 1704 if ($1 != NULL) { 1705 sym_t *msym; 1706 /* XXX strmemb should be integrated in build() */ 1707 if ($2 == ARROW) { 1708 /* must to this before strmemb is called */ 1709 $1 = cconv($1); 1710 } 1711 msym = strmemb($1, $2, getsym($3)); 1712 $$ = build($2, $1, getnnode(msym, 0)); 1713 } else { 1714 $$ = NULL; 1715 } 1716 } 1717 | T_REAL term { 1718 $$ = build(REAL, $2, NULL); 1719 } 1720 | T_IMAG term { 1721 $$ = build(IMAG, $2, NULL); 1722 } 1723 | T_REAL T_LPARN term T_RPARN { 1724 $$ = build(REAL, $3, NULL); 1725 } 1726 | T_IMAG T_LPARN term T_RPARN { 1727 $$ = build(IMAG, $3, NULL); 1728 } 1729 | T_SIZEOF term %prec T_SIZEOF { 1730 if (($$ = $2 == NULL ? NULL : bldszof($2->tn_type)) != NULL) 1731 chkmisc($2, 0, 0, 0, 0, 0, 1); 1732 } 1733 | T_SIZEOF T_LPARN type_name T_RPARN %prec T_SIZEOF { 1734 $$ = bldszof($3); 1735 } 1736 | T_ALIGNOF T_LPARN type_name T_RPARN %prec T_ALIGNOF { 1737 $$ = bldalof($3); 1738 } 1739 | T_LPARN type_name T_RPARN term %prec T_UNOP { 1740 $$ = cast($4, $2); 1741 } 1742 | T_LPARN type_name T_RPARN %prec T_UNOP { 1743 sym_t *tmp = mktempsym($2); 1744 idecl(tmp, 1, NULL); 1745 } init_lbrace init_expr_list init_rbrace { 1746 if (!Sflag) 1747 gnuism(319); 1748 $$ = getnnode(initsym, 0); 1749 } 1750 ; 1751 1752 string: 1753 T_STRING { 1754 $$ = $1; 1755 } 1756 | T_STRING string2 { 1757 $$ = catstrg($1, $2); 1758 } 1759 ; 1760 1761 string2: 1762 T_STRING { 1763 if (tflag) { 1764 /* concatenated strings are illegal in traditional C */ 1765 warning(219); 1766 } 1767 $$ = $1; 1768 } 1769 | string2 T_STRING { 1770 $$ = catstrg($1, $2); 1771 } 1772 ; 1773 1774 func_arg_list: 1775 expr %prec T_COMMA { 1776 $$ = funcarg(NULL, $1); 1777 } 1778 | func_arg_list T_COMMA expr { 1779 $$ = funcarg($1, $3); 1780 } 1781 ; 1782 1783 point_or_arrow: 1784 T_STROP { 1785 symtyp = FMOS; 1786 $$ = $1; 1787 } 1788 ; 1789 1790 point: 1791 T_STROP { 1792 if ($1 != POINT) 1793 error(249, yytext); 1794 } 1795 ; 1796 1797 identifier: 1798 T_NAME { 1799 $$ = $1; 1800 } 1801 | T_TYPENAME { 1802 $$ = $1; 1803 } 1804 ; 1805 1806 %% 1807 1808 /* ARGSUSED */ 1809 int 1810 yyerror(const char *msg) 1811 { 1812 error(249, yytext); 1813 if (++sytxerr >= 5) 1814 norecover(); 1815 return (0); 1816 } 1817 1818 static __inline int uq_gt(uint64_t, uint64_t); 1819 static __inline int q_gt(int64_t, int64_t); 1820 1821 static __inline int 1822 uq_gt(uint64_t a, uint64_t b) 1823 { 1824 1825 return (a > b); 1826 } 1827 1828 static __inline int 1829 q_gt(int64_t a, int64_t b) 1830 { 1831 1832 return (a > b); 1833 } 1834 1835 #define q_lt(a, b) q_gt(b, a) 1836 1837 /* 1838 * Gets a node for a constant and returns the value of this constant 1839 * as integer. 1840 * Is the node not constant or too large for int or of type float, 1841 * a warning will be printed. 1842 * 1843 * toicon() should be used only inside declarations. If it is used in 1844 * expressions, it frees the memory used for the expression. 1845 */ 1846 static int 1847 toicon(tnode_t *tn, int required) 1848 { 1849 int i; 1850 tspec_t t; 1851 val_t *v; 1852 1853 v = constant(tn, required); 1854 1855 /* 1856 * Abstract declarations are used inside expression. To free 1857 * the memory would be a fatal error. 1858 */ 1859 if (dcs->d_ctx != ABSTRACT) 1860 tfreeblk(); 1861 1862 if ((t = v->v_tspec) == FLOAT || t == DOUBLE || t == LDOUBLE) { 1863 i = (int)v->v_ldbl; 1864 /* integral constant expression expected */ 1865 error(55); 1866 } else { 1867 i = (int)v->v_quad; 1868 if (isutyp(t)) { 1869 if (uq_gt((uint64_t)v->v_quad, 1870 (uint64_t)INT_MAX)) { 1871 /* integral constant too large */ 1872 warning(56); 1873 } 1874 } else { 1875 if (q_gt(v->v_quad, (int64_t)INT_MAX) || 1876 q_lt(v->v_quad, (int64_t)INT_MIN)) { 1877 /* integral constant too large */ 1878 warning(56); 1879 } 1880 } 1881 } 1882 free(v); 1883 return (i); 1884 } 1885 1886 static void 1887 idecl(sym_t *decl, int initflg, sbuf_t *renaming) 1888 { 1889 char *s; 1890 1891 initerr = 0; 1892 initsym = decl; 1893 1894 switch (dcs->d_ctx) { 1895 case EXTERN: 1896 if (renaming != NULL) { 1897 if (decl->s_rename != NULL) 1898 LERROR("idecl()"); 1899 1900 s = getlblk(1, renaming->sb_len + 1); 1901 (void)memcpy(s, renaming->sb_name, renaming->sb_len + 1); 1902 decl->s_rename = s; 1903 freeyyv(&renaming, T_NAME); 1904 } 1905 decl1ext(decl, initflg); 1906 break; 1907 case ARG: 1908 if (renaming != NULL) { 1909 /* symbol renaming can't be used on function arguments */ 1910 error(310); 1911 freeyyv(&renaming, T_NAME); 1912 break; 1913 } 1914 (void)decl1arg(decl, initflg); 1915 break; 1916 case AUTO: 1917 if (renaming != NULL) { 1918 /* symbol renaming can't be used on automatic variables */ 1919 error(311); 1920 freeyyv(&renaming, T_NAME); 1921 break; 1922 } 1923 decl1loc(decl, initflg); 1924 break; 1925 default: 1926 LERROR("idecl()"); 1927 } 1928 1929 if (initflg && !initerr) 1930 prepinit(); 1931 } 1932 1933 /* 1934 * Discard all input tokens up to and including the next 1935 * unmatched right paren 1936 */ 1937 static void 1938 ignuptorp(void) 1939 { 1940 int level; 1941 1942 if (yychar < 0) 1943 yychar = yylex(); 1944 freeyyv(&yylval, yychar); 1945 1946 level = 1; 1947 while (yychar != T_RPARN || --level > 0) { 1948 if (yychar == T_LPARN) { 1949 level++; 1950 } else if (yychar <= 0) { 1951 break; 1952 } 1953 freeyyv(&yylval, yychar = yylex()); 1954 } 1955 1956 yyclearin; 1957 } 1958