| blob | 04879dc2e93e146e32618030109226ff4e3acfe4 |
1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* This file defines the grammar of C and that of Objective C.
21 ifobjc ... end ifobjc conditionals contain code for Objective C only.
22 ifc ... end ifc conditionals contain code for C only.
23 Sed commands in Makefile.in are used to convert this file into
24 c-parse.y and into objc-parse.y. */
26 /* To whomever it may concern: I have heard that such a thing was once
27 written by AT&T, but I have never seen it. */
29 ifobjc
30 %expect 20
31 end ifobjc
32 ifc
33 %expect 8
35 /* These are the 8 conflicts you should get in parse.output;
36 the state numbers may vary if minor changes in the grammar are made.
38 State 41 contains 1 shift/reduce conflict. (Two ways to recover from error.)
39 State 92 contains 1 shift/reduce conflict. (Two ways to recover from error.)
40 State 99 contains 1 shift/reduce conflict. (Two ways to recover from error.)
41 State 103 contains 1 shift/reduce conflict. (Two ways to recover from error.)
42 State 119 contains 1 shift/reduce conflict. (See comment at component_decl.)
43 State 183 contains 1 shift/reduce conflict. (Two ways to recover from error.)
44 State 193 contains 1 shift/reduce conflict. (Two ways to recover from error.)
45 State 199 contains 1 shift/reduce conflict. (Two ways to recover from error.)
46 */
47 end ifc
49 %{
50 #include <stdio.h>
51 #include <errno.h>
52 #include <setjmp.h>
54 #include "config.h"
55 #include "tree.h"
56 #include "input.h"
57 #include "c-lex.h"
58 #include "c-tree.h"
59 #include "flags.h"
61 #ifdef MULTIBYTE_CHARS
62 #include <stdlib.h>
63 #include <locale.h>
64 #endif
66 ifobjc
67 #include "objc-act.h"
68 end ifobjc
70 /* Since parsers are distinct for each language, put the language string
71 definition here. */
72 ifobjc
73 char *language_string = "GNU Obj-C";
74 end ifobjc
75 ifc
76 char *language_string = "GNU C";
77 end ifc
79 #ifndef errno
80 extern int errno;
81 #endif
83 void yyerror ();
85 /* Like YYERROR but do call yyerror. */
86 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
88 /* Cause the `yydebug' variable to be defined. */
89 #define YYDEBUG 1
90 %}
92 %start program
94 %union {long itype; tree ttype; enum tree_code code;
95 char *filename; int lineno; }
97 /* All identifiers that are not reserved words
98 and are not declared typedefs in the current block */
99 %token IDENTIFIER
101 /* All identifiers that are declared typedefs in the current block.
102 In some contexts, they are treated just like IDENTIFIER,
103 but they can also serve as typespecs in declarations. */
104 %token TYPENAME
106 /* Reserved words that specify storage class.
107 yylval contains an IDENTIFIER_NODE which indicates which one. */
108 %token SCSPEC
110 /* Reserved words that specify type.
111 yylval contains an IDENTIFIER_NODE which indicates which one. */
112 %token TYPESPEC
114 /* Reserved words that qualify type: "const" or "volatile".
115 yylval contains an IDENTIFIER_NODE which indicates which one. */
116 %token TYPE_QUAL
118 /* Character or numeric constants.
119 yylval is the node for the constant. */
120 %token CONSTANT
122 /* String constants in raw form.
123 yylval is a STRING_CST node. */
124 %token STRING
126 /* "...", used for functions with variable arglists. */
127 %token ELLIPSIS
129 /* the reserved words */
130 /* SCO include files test "ASM", so use something else. */
131 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
132 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF ALIGN
133 %token ATTRIBUTE EXTENSION LABEL
134 %token REALPART IMAGPART
136 /* Add precedence rules to solve dangling else s/r conflict */
137 %nonassoc IF
138 %nonassoc ELSE
140 /* Define the operator tokens and their precedences.
141 The value is an integer because, if used, it is the tree code
142 to use in the expression made from the operator. */
144 %right <code> ASSIGN '='
145 %right <code> '?' ':'
146 %left <code> OROR
147 %left <code> ANDAND
148 %left <code> '|'
149 %left <code> '^'
150 %left <code> '&'
151 %left <code> EQCOMPARE
152 %left <code> ARITHCOMPARE
153 %left <code> LSHIFT RSHIFT
154 %left <code> '+' '-'
155 %left <code> '*' '/' '%'
156 %right <code> UNARY PLUSPLUS MINUSMINUS
157 %left HYPERUNARY
158 %left <code> POINTSAT '.' '(' '['
160 /* The Objective-C keywords. These are included in C and in
161 Objective C, so that the token codes are the same in both. */
162 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
163 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
165 /* Objective-C string constants in raw form.
166 yylval is an OBJC_STRING_CST node. */
167 %token OBJC_STRING
170 %type <code> unop
172 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
173 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
174 %type <ttype> typed_declspecs reserved_declspecs
175 %type <ttype> typed_typespecs reserved_typespecquals
176 %type <ttype> declmods typespec typespecqual_reserved
177 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
178 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
179 %type <ttype> init maybeasm
180 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
181 %type <ttype> maybe_attribute attribute_list attrib
183 %type <ttype> compstmt
185 %type <ttype> declarator
186 %type <ttype> notype_declarator after_type_declarator
187 %type <ttype> parm_declarator
189 %type <ttype> structsp component_decl_list component_decl_list2
190 %type <ttype> component_decl components component_declarator
191 %type <ttype> enumlist enumerator
192 %type <ttype> typename absdcl absdcl1 type_quals
193 %type <ttype> xexpr parms parm identifiers
195 %type <ttype> parmlist parmlist_1 parmlist_2
196 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
197 %type <ttype> identifiers_or_typenames
199 %type <itype> setspecs
201 %type <filename> save_filename
202 %type <lineno> save_lineno
203 \f
204 ifobjc
205 /* the Objective-C nonterminals */
207 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
208 %type <ttype> methoddecl unaryselector keywordselector selector
209 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
210 %type <ttype> keywordexpr keywordarglist keywordarg
211 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
212 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
213 %type <ttype> objc_string protocolrefs identifier_list objcprotocolexpr
214 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
215 end ifobjc
216 \f
217 %{
218 /* Number of statements (loosely speaking) seen so far. */
219 static int stmt_count;
221 /* Input file and line number of the end of the body of last simple_if;
222 used by the stmt-rule immediately after simple_if returns. */
223 static char *if_stmt_file;
224 static int if_stmt_line;
226 /* List of types and structure classes of the current declaration. */
227 static tree current_declspecs;
229 /* Stack of saved values of current_declspecs. */
230 static tree declspec_stack;
232 /* 1 if we explained undeclared var errors. */
233 static int undeclared_variable_notice;
235 ifobjc
236 /* Objective-C specific information */
238 tree objc_interface_context;
239 tree objc_implementation_context;
240 tree objc_method_context;
241 tree objc_ivar_chain;
242 tree objc_ivar_context;
243 enum tree_code objc_inherit_code;
244 int objc_receiver_context;
245 int objc_public_flag;
247 end ifobjc
249 /* Tell yyparse how to print a token's value, if yydebug is set. */
251 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
252 extern void yyprint ();
253 %}
254 \f
255 %%
256 program: /* empty */
257 { if (pedantic)
258 pedwarn ("ANSI C forbids an empty source file");
259 ifobjc
260 objc_finish ();
261 end ifobjc
262 }
263 | extdefs
264 {
265 /* In case there were missing closebraces,
266 get us back to the global binding level. */
267 while (! global_bindings_p ())
268 poplevel (0, 0, 0);
269 ifobjc
270 objc_finish ();
271 end ifobjc
272 }
273 ;
275 /* the reason for the strange actions in this rule
276 is so that notype_initdecls when reached via datadef
277 can find a valid list of type and sc specs in $0. */
279 extdefs:
280 {$<ttype>$ = NULL_TREE; } extdef
281 | extdefs {$<ttype>$ = NULL_TREE; } extdef
282 ;
284 extdef:
285 fndef
286 | datadef
287 ifobjc
288 | objcdef
289 end ifobjc
290 | ASM_KEYWORD '(' expr ')' ';'
291 { STRIP_NOPS ($3);
292 if ((TREE_CODE ($3) == ADDR_EXPR
293 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
294 || TREE_CODE ($3) == STRING_CST)
295 assemble_asm ($3);
296 else
297 error ("argument of `asm' is not a constant string"); }
298 ;
300 datadef:
301 setspecs notype_initdecls ';'
302 { if (pedantic)
303 error ("ANSI C forbids data definition with no type or storage class");
304 else if (!flag_traditional)
305 warning ("data definition has no type or storage class"); }
306 | declmods setspecs notype_initdecls ';'
307 {}
308 | typed_declspecs setspecs initdecls ';'
309 {}
310 | declmods ';'
311 { pedwarn ("empty declaration"); }
312 | typed_declspecs ';'
313 { shadow_tag ($1); }
314 | error ';'
315 | error '}'
316 | ';'
317 { if (pedantic)
318 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
319 ;
320 \f
321 fndef:
322 typed_declspecs setspecs declarator
323 { if (! start_function ($1, $3, 0))
324 YYERROR1;
325 reinit_parse_for_function (); }
326 xdecls
327 { store_parm_decls (); }
328 compstmt_or_error
329 { finish_function (0); }
330 | typed_declspecs setspecs declarator error
331 { }
332 | declmods setspecs notype_declarator
333 { if (! start_function ($1, $3, 0))
334 YYERROR1;
335 reinit_parse_for_function (); }
336 xdecls
337 { store_parm_decls (); }
338 compstmt_or_error
339 { finish_function (0); }
340 | declmods setspecs notype_declarator error
341 { }
342 | setspecs notype_declarator
343 { if (! start_function (NULL_TREE, $2, 0))
344 YYERROR1;
345 reinit_parse_for_function (); }
346 xdecls
347 { store_parm_decls (); }
348 compstmt_or_error
349 { finish_function (0); }
350 | setspecs notype_declarator error
351 { }
352 ;
354 identifier:
355 IDENTIFIER
356 | TYPENAME
357 ifobjc
358 | OBJECTNAME
359 | CLASSNAME
360 end ifobjc
361 ;
363 unop: '&'
364 { $$ = ADDR_EXPR; }
365 | '-'
366 { $$ = NEGATE_EXPR; }
367 | '+'
368 { $$ = CONVERT_EXPR; }
369 | PLUSPLUS
370 { $$ = PREINCREMENT_EXPR; }
371 | MINUSMINUS
372 { $$ = PREDECREMENT_EXPR; }
373 | '~'
374 { $$ = BIT_NOT_EXPR; }
375 | '!'
376 { $$ = TRUTH_NOT_EXPR; }
377 ;
379 expr: nonnull_exprlist
380 { $$ = build_compound_expr ($1); }
381 ;
383 exprlist:
384 /* empty */
385 { $$ = NULL_TREE; }
386 | nonnull_exprlist
387 ;
389 nonnull_exprlist:
390 expr_no_commas
391 { $$ = build_tree_list (NULL_TREE, $1); }
392 | nonnull_exprlist ',' expr_no_commas
393 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
394 ;
396 unary_expr:
397 primary
398 | '*' cast_expr %prec UNARY
399 { $$ = build_indirect_ref ($2, "unary *"); }
400 /* __extension__ turns off -pedantic for following primary. */
401 | EXTENSION
402 { $<itype>1 = pedantic;
403 pedantic = 0; }
404 cast_expr %prec UNARY
405 { $$ = $3;
406 pedantic = $<itype>1; }
407 | unop cast_expr %prec UNARY
408 { $$ = build_unary_op ($1, $2, 0);
409 overflow_warning ($$); }
410 /* Refer to the address of a label as a pointer. */
411 | ANDAND identifier
412 { tree label = lookup_label ($2);
413 if (label == 0)
414 $$ = null_pointer_node;
415 else
416 {
417 TREE_USED (label) = 1;
418 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
419 TREE_CONSTANT ($$) = 1;
420 }
421 }
422 /* This seems to be impossible on some machines, so let's turn it off.
423 You can use __builtin_next_arg to find the anonymous stack args.
424 | '&' ELLIPSIS
425 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
426 $$ = error_mark_node;
427 if (TREE_VALUE (tree_last (types)) == void_type_node)
428 error ("`&...' used in function with fixed number of arguments");
429 else
430 {
431 if (pedantic)
432 pedwarn ("ANSI C forbids `&...'");
433 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
434 $$ = build_unary_op (ADDR_EXPR, $$, 0);
435 } }
436 */
437 | SIZEOF unary_expr %prec UNARY
438 { if (TREE_CODE ($2) == COMPONENT_REF
439 && DECL_BIT_FIELD (TREE_OPERAND ($2, 1)))
440 error ("`sizeof' applied to a bit-field");
441 $$ = c_sizeof (TREE_TYPE ($2)); }
442 | SIZEOF '(' typename ')' %prec HYPERUNARY
443 { $$ = c_sizeof (groktypename ($3)); }
444 | ALIGNOF unary_expr %prec UNARY
445 { $$ = c_alignof_expr ($2); }
446 | ALIGNOF '(' typename ')' %prec HYPERUNARY
447 { $$ = c_alignof (groktypename ($3)); }
448 | REALPART cast_expr %prec UNARY
449 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
450 | IMAGPART cast_expr %prec UNARY
451 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
452 ;
454 cast_expr:
455 unary_expr
456 | '(' typename ')' cast_expr %prec UNARY
457 { tree type = groktypename ($2);
458 $$ = build_c_cast (type, $4); }
459 | '(' typename ')' '{'
460 { start_init (NULL_TREE, NULL, 0);
461 $2 = groktypename ($2);
462 really_start_incremental_init ($2); }
463 initlist_maybe_comma '}' %prec UNARY
464 { char *name;
465 tree result = pop_init_level (0);
466 tree type = $2;
467 finish_init ();
469 if (pedantic)
470 pedwarn ("ANSI C forbids constructor expressions");
471 if (TYPE_NAME (type) != 0)
472 {
473 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
474 name = IDENTIFIER_POINTER (TYPE_NAME (type));
475 else
476 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
477 }
478 else
479 name = "";
480 $$ = result;
481 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
482 {
483 int failure = complete_array_type (type, $$, 1);
484 if (failure)
485 abort ();
486 }
487 }
488 ;
490 expr_no_commas:
491 cast_expr
492 | expr_no_commas '+' expr_no_commas
493 { $$ = parser_build_binary_op ($2, $1, $3); }
494 | expr_no_commas '-' expr_no_commas
495 { $$ = parser_build_binary_op ($2, $1, $3); }
496 | expr_no_commas '*' expr_no_commas
497 { $$ = parser_build_binary_op ($2, $1, $3); }
498 | expr_no_commas '/' expr_no_commas
499 { $$ = parser_build_binary_op ($2, $1, $3); }
500 | expr_no_commas '%' expr_no_commas
501 { $$ = parser_build_binary_op ($2, $1, $3); }
502 | expr_no_commas LSHIFT expr_no_commas
503 { $$ = parser_build_binary_op ($2, $1, $3); }
504 | expr_no_commas RSHIFT expr_no_commas
505 { $$ = parser_build_binary_op ($2, $1, $3); }
506 | expr_no_commas ARITHCOMPARE expr_no_commas
507 { $$ = parser_build_binary_op ($2, $1, $3); }
508 | expr_no_commas EQCOMPARE expr_no_commas
509 { $$ = parser_build_binary_op ($2, $1, $3); }
510 | expr_no_commas '&' expr_no_commas
511 { $$ = parser_build_binary_op ($2, $1, $3); }
512 | expr_no_commas '|' expr_no_commas
513 { $$ = parser_build_binary_op ($2, $1, $3); }
514 | expr_no_commas '^' expr_no_commas
515 { $$ = parser_build_binary_op ($2, $1, $3); }
516 | expr_no_commas ANDAND expr_no_commas
517 { $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $3); }
518 | expr_no_commas OROR expr_no_commas
519 { $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $3); }
520 | expr_no_commas '?' xexpr ':' expr_no_commas
521 { $$ = build_conditional_expr ($1, $3, $5); }
522 | expr_no_commas '=' expr_no_commas
523 { $$ = build_modify_expr ($1, NOP_EXPR, $3);
524 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
525 | expr_no_commas ASSIGN expr_no_commas
526 { $$ = build_modify_expr ($1, $2, $3);
527 /* This inhibits warnings in truthvalue_conversion. */
528 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK); }
529 ;
531 primary:
532 IDENTIFIER
533 {
534 tree context;
536 $$ = lastiddecl;
537 if (!$$ || $$ == error_mark_node)
538 {
539 if (yychar == YYEMPTY)
540 yychar = YYLEX;
541 if (yychar == '(')
542 {
543 ifobjc
544 tree decl;
546 if (objc_receiver_context
547 && ! (objc_receiver_context
548 && strcmp (IDENTIFIER_POINTER ($1), "super")))
549 /* we have a message to super */
550 $$ = get_super_receiver ();
551 else if (objc_method_context
552 && (decl = is_ivar (objc_ivar_chain, $1)))
553 {
554 if (is_private (decl))
555 $$ = error_mark_node;
556 else
557 $$ = build_ivar_reference ($1);
558 }
559 else
560 end ifobjc
561 {
562 /* Ordinary implicit function declaration. */
563 $$ = implicitly_declare ($1);
564 assemble_external ($$);
565 TREE_USED ($$) = 1;
566 }
567 }
568 else if (current_function_decl == 0)
569 {
570 error ("`%s' undeclared here (not in a function)",
571 IDENTIFIER_POINTER ($1));
572 $$ = error_mark_node;
573 }
574 else
575 {
576 ifobjc
577 tree decl;
579 if (objc_receiver_context
580 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
581 /* we have a message to super */
582 $$ = get_super_receiver ();
583 else if (objc_method_context
584 && (decl = is_ivar (objc_ivar_chain, $1)))
585 {
586 if (is_private (decl))
587 $$ = error_mark_node;
588 else
589 $$ = build_ivar_reference ($1);
590 }
591 else
592 end ifobjc
593 {
594 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
595 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
596 {
597 error ("`%s' undeclared (first use this function)",
598 IDENTIFIER_POINTER ($1));
600 if (! undeclared_variable_notice)
601 {
602 error ("(Each undeclared identifier is reported only once");
603 error ("for each function it appears in.)");
604 undeclared_variable_notice = 1;
605 }
606 }
607 $$ = error_mark_node;
608 /* Prevent repeated error messages. */
609 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
610 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
611 }
612 }
613 }
614 else if (TREE_TYPE ($$) == error_mark_node)
615 $$ = error_mark_node;
616 else if (C_DECL_ANTICIPATED ($$))
617 {
618 /* The first time we see a build-in function used,
619 if it has not been declared. */
620 C_DECL_ANTICIPATED ($$) = 0;
621 if (yychar == YYEMPTY)
622 yychar = YYLEX;
623 if (yychar == '(')
624 {
625 /* Omit the implicit declaration we
626 would ordinarily do, so we don't lose
627 the actual built in type.
628 But print a diagnostic for the mismatch. */
629 ifobjc
630 if (objc_method_context
631 && is_ivar (objc_ivar_chain, $1))
632 error ("Instance variable `%s' implicitly declared as function",
633 IDENTIFIER_POINTER (DECL_NAME ($$)));
634 else
635 end ifobjc
636 if (TREE_CODE ($$) != FUNCTION_DECL)
637 error ("`%s' implicitly declared as function",
638 IDENTIFIER_POINTER (DECL_NAME ($$)));
639 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
640 != TYPE_MODE (integer_type_node))
641 && (TREE_TYPE (TREE_TYPE ($$))
642 != void_type_node))
643 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
644 IDENTIFIER_POINTER (DECL_NAME ($$)));
645 /* If it really returns void, change that to int. */
646 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
647 TREE_TYPE ($$)
648 = build_function_type (integer_type_node,
649 TYPE_ARG_TYPES (TREE_TYPE ($$)));
650 }
651 else
652 pedwarn ("built-in function `%s' used without declaration",
653 IDENTIFIER_POINTER (DECL_NAME ($$)));
655 /* Do what we would ordinarily do when a fn is used. */
656 assemble_external ($$);
657 TREE_USED ($$) = 1;
658 }
659 else
660 {
661 assemble_external ($$);
662 TREE_USED ($$) = 1;
663 ifobjc
664 /* we have a definition - still check if iVariable */
666 if (!objc_receiver_context
667 || (objc_receiver_context
668 && strcmp (IDENTIFIER_POINTER ($1), "super")))
669 {
670 tree decl;
672 if (objc_method_context
673 && (decl = is_ivar (objc_ivar_chain, $1)))
674 {
675 if (IDENTIFIER_LOCAL_VALUE ($1))
676 warning ("local declaration of `%s' hides instance variable",
677 IDENTIFIER_POINTER ($1));
678 else
679 {
680 if (is_private (decl))
681 $$ = error_mark_node;
682 else
683 $$ = build_ivar_reference ($1);
684 }
685 }
686 }
687 else /* we have a message to super */
688 $$ = get_super_receiver ();
689 end ifobjc
690 }
692 if (TREE_CODE ($$) == CONST_DECL)
693 {
694 $$ = DECL_INITIAL ($$);
695 /* This is to prevent an enum whose value is 0
696 from being considered a null pointer constant. */
697 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
698 TREE_CONSTANT ($$) = 1;
699 }
700 }
701 | CONSTANT
702 | string
703 { $$ = combine_strings ($1); }
704 | '(' expr ')'
705 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
706 if (class == 'e' || class == '1'
707 || class == '2' || class == '<')
708 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
709 $$ = $2; }
710 | '(' error ')'
711 { $$ = error_mark_node; }
712 | '('
713 { if (current_function_decl == 0)
714 {
715 error ("braced-group within expression allowed only inside a function");
716 YYERROR;
717 }
718 /* We must force a BLOCK for this level
719 so that, if it is not expanded later,
720 there is a way to turn off the entire subtree of blocks
721 that are contained in it. */
722 keep_next_level ();
723 push_iterator_stack ();
724 push_label_level ();
725 $<ttype>$ = expand_start_stmt_expr (); }
726 compstmt ')'
727 { tree rtl_exp;
728 if (pedantic)
729 pedwarn ("ANSI C forbids braced-groups within expressions");
730 pop_iterator_stack ();
731 pop_label_level ();
732 rtl_exp = expand_end_stmt_expr ($<ttype>2);
733 /* The statements have side effects, so the group does. */
734 TREE_SIDE_EFFECTS (rtl_exp) = 1;
736 if (TREE_CODE ($3) == BLOCK)
737 {
738 /* Make a BIND_EXPR for the BLOCK already made. */
739 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
740 NULL_TREE, rtl_exp, $3);
741 /* Remove the block from the tree at this point.
742 It gets put back at the proper place
743 when the BIND_EXPR is expanded. */
744 delete_block ($3);
745 }
746 else
747 $$ = $3;
748 }
749 | primary '(' exprlist ')' %prec '.'
750 { $$ = build_function_call ($1, $3); }
751 | primary '[' expr ']' %prec '.'
752 { $$ = build_array_ref ($1, $3); }
753 | primary '.' identifier
754 {
755 ifobjc
756 if (doing_objc_thang)
757 {
758 if (is_public ($1, $3))
759 $$ = build_component_ref ($1, $3);
760 else
761 $$ = error_mark_node;
762 }
763 else
764 end ifobjc
765 $$ = build_component_ref ($1, $3);
766 }
767 | primary POINTSAT identifier
768 {
769 tree expr = build_indirect_ref ($1, "->");
771 ifobjc
772 if (doing_objc_thang)
773 {
774 if (is_public (expr, $3))
775 $$ = build_component_ref (expr, $3);
776 else
777 $$ = error_mark_node;
778 }
779 else
780 end ifobjc
781 $$ = build_component_ref (expr, $3);
782 }
783 | primary PLUSPLUS
784 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
785 | primary MINUSMINUS
786 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
787 ifobjc
788 | objcmessageexpr
789 { $$ = build_message_expr ($1); }
790 | objcselectorexpr
791 { $$ = build_selector_expr ($1); }
792 | objcprotocolexpr
793 { $$ = build_protocol_expr ($1); }
794 | objcencodeexpr
795 { $$ = build_encode_expr ($1); }
796 | objc_string
797 { $$ = build_objc_string_object ($1); }
798 end ifobjc
799 ;
801 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
802 string:
803 STRING
804 | string STRING
805 { $$ = chainon ($1, $2); }
806 ;
808 ifobjc
809 /* Produces an OBJC_STRING_CST with prehaps more OBJC_STRING_CSTs chained
810 onto it. */
811 objc_string:
812 OBJC_STRING
813 | objc_string OBJC_STRING
814 { $$ = chainon ($1, $2); }
815 ;
816 end ifobjc
818 xdecls:
819 /* empty */
820 | datadecls
821 | datadecls ELLIPSIS
822 /* ... is used here to indicate a varargs function. */
823 { c_mark_varargs ();
824 if (pedantic)
825 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
826 ;
828 /* The following are analogous to lineno_decl, decls and decl
829 except that they do not allow nested functions.
830 They are used for old-style parm decls. */
831 lineno_datadecl:
832 save_filename save_lineno datadecl
833 { }
834 ;
836 datadecls:
837 lineno_datadecl
838 | errstmt
839 | datadecls lineno_datadecl
840 | lineno_datadecl errstmt
841 ;
843 datadecl:
844 typed_declspecs setspecs initdecls ';'
845 { current_declspecs = TREE_VALUE (declspec_stack);
846 declspec_stack = TREE_CHAIN (declspec_stack);
847 resume_momentary ($2); }
848 | declmods setspecs notype_initdecls ';'
849 { current_declspecs = TREE_VALUE (declspec_stack);
850 declspec_stack = TREE_CHAIN (declspec_stack);
851 resume_momentary ($2); }
852 | typed_declspecs ';'
853 { shadow_tag_warned ($1, 1);
854 pedwarn ("empty declaration"); }
855 | declmods ';'
856 { pedwarn ("empty declaration"); }
857 ;
859 /* This combination which saves a lineno before a decl
860 is the normal thing to use, rather than decl itself.
861 This is to avoid shift/reduce conflicts in contexts
862 where statement labels are allowed. */
863 lineno_decl:
864 save_filename save_lineno decl
865 { }
866 ;
868 decls:
869 lineno_decl
870 | errstmt
871 | decls lineno_decl
872 | lineno_decl errstmt
873 ;
875 /* records the type and storage class specs to use for processing
876 the declarators that follow.
877 Maintains a stack of outer-level values of current_declspecs,
878 for the sake of parm declarations nested in function declarators. */
879 setspecs: /* empty */
880 { $$ = suspend_momentary ();
881 pending_xref_error ();
882 declspec_stack = tree_cons (NULL_TREE, current_declspecs,
883 declspec_stack);
884 current_declspecs = $<ttype>0; }
885 ;
887 decl:
888 typed_declspecs setspecs initdecls ';'
889 { current_declspecs = TREE_VALUE (declspec_stack);
890 declspec_stack = TREE_CHAIN (declspec_stack);
891 resume_momentary ($2); }
892 | declmods setspecs notype_initdecls ';'
893 { current_declspecs = TREE_VALUE (declspec_stack);
894 declspec_stack = TREE_CHAIN (declspec_stack);
895 resume_momentary ($2); }
896 | typed_declspecs setspecs nested_function
897 { current_declspecs = TREE_VALUE (declspec_stack);
898 declspec_stack = TREE_CHAIN (declspec_stack);
899 resume_momentary ($2); }
900 | declmods setspecs notype_nested_function
901 { current_declspecs = TREE_VALUE (declspec_stack);
902 declspec_stack = TREE_CHAIN (declspec_stack);
903 resume_momentary ($2); }
904 | typed_declspecs ';'
905 { shadow_tag ($1); }
906 | declmods ';'
907 { pedwarn ("empty declaration"); }
908 ;
910 /* Declspecs which contain at least one type specifier or typedef name.
911 (Just `const' or `volatile' is not enough.)
912 A typedef'd name following these is taken as a name to be declared. */
914 typed_declspecs:
915 typespec reserved_declspecs
916 { $$ = tree_cons (NULL_TREE, $1, $2); }
917 | declmods typespec reserved_declspecs
918 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
919 ;
921 reserved_declspecs: /* empty */
922 { $$ = NULL_TREE; }
923 | reserved_declspecs typespecqual_reserved
924 { $$ = tree_cons (NULL_TREE, $2, $1); }
925 | reserved_declspecs SCSPEC
926 { if (extra_warnings)
927 warning ("`%s' is not at beginning of declaration",
928 IDENTIFIER_POINTER ($2));
929 $$ = tree_cons (NULL_TREE, $2, $1); }
930 ;
932 /* List of just storage classes and type modifiers.
933 A declaration can start with just this, but then it cannot be used
934 to redeclare a typedef-name. */
936 declmods:
937 TYPE_QUAL
938 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
939 TREE_STATIC ($$) = 1; }
940 | SCSPEC
941 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
942 | declmods TYPE_QUAL
943 { $$ = tree_cons (NULL_TREE, $2, $1);
944 TREE_STATIC ($$) = 1; }
945 | declmods SCSPEC
946 { if (extra_warnings && TREE_STATIC ($1))
947 warning ("`%s' is not at beginning of declaration",
948 IDENTIFIER_POINTER ($2));
949 $$ = tree_cons (NULL_TREE, $2, $1);
950 TREE_STATIC ($$) = TREE_STATIC ($1); }
951 ;
954 /* Used instead of declspecs where storage classes are not allowed
955 (that is, for typenames and structure components).
956 Don't accept a typedef-name if anything but a modifier precedes it. */
958 typed_typespecs:
959 typespec reserved_typespecquals
960 { $$ = tree_cons (NULL_TREE, $1, $2); }
961 | nonempty_type_quals typespec reserved_typespecquals
962 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
963 ;
965 reserved_typespecquals: /* empty */
966 { $$ = NULL_TREE; }
967 | reserved_typespecquals typespecqual_reserved
968 { $$ = tree_cons (NULL_TREE, $2, $1); }
969 ;
971 /* A typespec (but not a type qualifier).
972 Once we have seen one of these in a declaration,
973 if a typedef name appears then it is being redeclared. */
975 typespec: TYPESPEC
976 | structsp
977 | TYPENAME
978 { /* For a typedef name, record the meaning, not the name.
979 In case of `foo foo, bar;'. */
980 $$ = lookup_name ($1); }
981 ifobjc
982 | CLASSNAME protocolrefs
983 { $$ = get_static_reference ($1, $2); }
984 | OBJECTNAME protocolrefs
985 { $$ = get_object_reference ($2); }
986 end ifobjc
987 | TYPEOF '(' expr ')'
988 { $$ = TREE_TYPE ($3); }
989 | TYPEOF '(' typename ')'
990 { $$ = groktypename ($3); }
991 ;
993 /* A typespec that is a reserved word, or a type qualifier. */
995 typespecqual_reserved: TYPESPEC
996 | TYPE_QUAL
997 | structsp
998 ;
1000 initdecls:
1001 initdcl
1002 | initdecls ',' initdcl
1003 ;
1005 notype_initdecls:
1006 notype_initdcl
1007 | notype_initdecls ',' initdcl
1008 ;
1010 maybeasm:
1011 /* empty */
1012 { $$ = NULL_TREE; }
1013 | ASM_KEYWORD '(' string ')'
1014 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1015 $$ = $3;
1016 }
1017 ;
1019 initdcl:
1020 declarator maybeasm maybe_attribute '='
1021 { $<ttype>$ = start_decl ($1, current_declspecs, 1);
1022 start_init ($<ttype>$, $2, global_bindings_p ()); }
1023 init
1024 /* Note how the declaration of the variable is in effect while its init is parsed! */
1025 { finish_init ();
1026 decl_attributes ($<ttype>5, $3);
1027 finish_decl ($<ttype>5, $6, $2); }
1028 | declarator maybeasm maybe_attribute
1029 { tree d = start_decl ($1, current_declspecs, 0);
1030 decl_attributes (d, $3);
1031 finish_decl (d, NULL_TREE, $2); }
1032 ;
1034 notype_initdcl:
1035 notype_declarator maybeasm maybe_attribute '='
1036 { $<ttype>$ = start_decl ($1, current_declspecs, 1);
1037 start_init ($<ttype>$, $2, global_bindings_p ()); }
1038 init
1039 /* Note how the declaration of the variable is in effect while its init is parsed! */
1040 { finish_init ();
1041 decl_attributes ($<ttype>5, $3);
1042 finish_decl ($<ttype>5, $6, $2); }
1043 | notype_declarator maybeasm maybe_attribute
1044 { tree d = start_decl ($1, current_declspecs, 0);
1045 decl_attributes (d, $3);
1046 finish_decl (d, NULL_TREE, $2); }
1047 ;
1048 /* the * rules are dummies to accept the Apollo extended syntax
1049 so that the header files compile. */
1050 maybe_attribute:
1051 /* empty */
1052 { $$ = NULL_TREE; }
1053 | ATTRIBUTE '(' '(' attribute_list ')' ')'
1054 { $$ = $4; }
1055 ;
1057 attribute_list
1058 : attrib
1059 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1060 | attribute_list ',' attrib
1061 { $$ = tree_cons (NULL_TREE, $3, $1); }
1062 ;
1064 attrib
1065 : IDENTIFIER
1066 { if (strcmp (IDENTIFIER_POINTER ($1), "packed")
1067 && strcmp (IDENTIFIER_POINTER ($1), "noreturn"))
1068 warning ("`%s' attribute directive ignored",
1069 IDENTIFIER_POINTER ($1));
1070 $$ = $1; }
1071 | TYPE_QUAL
1072 | IDENTIFIER '(' IDENTIFIER ')'
1073 { /* If not "mode (m)", then issue warning. */
1074 if (strcmp (IDENTIFIER_POINTER ($1), "mode") != 0)
1075 {
1076 warning ("`%s' attribute directive ignored",
1077 IDENTIFIER_POINTER ($1));
1078 $$ = $1;
1079 }
1080 else
1081 $$ = tree_cons ($1, $3, NULL_TREE); }
1082 | IDENTIFIER '(' CONSTANT ')'
1083 { /* if not "aligned(n)", then issue warning */
1084 if (strcmp (IDENTIFIER_POINTER ($1), "aligned") != 0
1085 || TREE_CODE ($3) != INTEGER_CST)
1086 {
1087 warning ("`%s' attribute directive ignored",
1088 IDENTIFIER_POINTER ($1));
1089 $$ = $1;
1090 }
1091 else
1092 $$ = tree_cons ($1, $3, NULL_TREE); }
1093 | IDENTIFIER '(' IDENTIFIER ',' CONSTANT ',' CONSTANT ')'
1094 { /* if not "format(...)", then issue warning */
1095 if (strcmp (IDENTIFIER_POINTER ($1), "format") != 0
1096 || TREE_CODE ($5) != INTEGER_CST
1097 || TREE_CODE ($7) != INTEGER_CST)
1098 {
1099 warning ("`%s' attribute directive ignored",
1100 IDENTIFIER_POINTER ($1));
1101 $$ = $1;
1102 }
1103 else
1104 $$ = tree_cons ($1,
1105 tree_cons ($3,
1106 tree_cons ($5, $7, NULL_TREE),
1107 NULL_TREE),
1108 NULL_TREE); }
1109 ;
1110 \f
1111 /* Initializers. `init' is the entry point. */
1113 init:
1114 expr_no_commas
1115 | '{'
1116 { really_start_incremental_init (NULL_TREE);
1117 /* Note that the call to clear_momentary
1118 is in process_init_element. */
1119 push_momentary (); }
1120 initlist_maybe_comma '}'
1121 { $$ = pop_init_level (0);
1122 pop_momentary (); }
1124 | error
1125 { $$ = error_mark_node;
1126 pop_momentary (); }
1127 ;
1129 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1130 initlist_maybe_comma:
1131 /* empty */
1132 { if (pedantic)
1133 pedwarn ("ANSI C forbids empty initializer braces"); }
1134 | initlist1 maybecomma
1135 ;
1137 initlist1:
1138 initelt
1139 | initlist1 ',' initelt
1140 ;
1142 /* `initelt' is a single element of an initializer.
1143 It may use braces. */
1144 initelt:
1145 expr_no_commas
1146 { process_init_element ($1); }
1147 | '{'
1148 { push_init_level (0); }
1149 initlist_maybe_comma '}'
1150 { process_init_element (pop_init_level (0)); }
1151 | error
1152 /* These are for labeled elements. The syntax for an array element
1153 initializer conflicts with the syntax for an Objective-C message,
1154 so don't include these productions in the Objective-C grammer. */
1155 ifc
1156 | '[' expr_no_commas ELLIPSIS expr_no_commas ']' '='
1157 { set_init_index ($2, $4); }
1158 initelt
1159 | '[' expr_no_commas ']' '='
1160 { set_init_index ($2, NULL_TREE); }
1161 initelt
1162 end ifc
1163 | identifier ':'
1164 { set_init_label ($1); }
1165 initelt
1166 | '.' identifier '='
1167 { set_init_label ($2); }
1168 initelt
1169 ;
1170 \f
1171 nested_function:
1172 declarator
1173 { push_c_function_context ();
1174 if (! start_function (current_declspecs, $1, 1))
1175 {
1176 pop_c_function_context ();
1177 YYERROR1;
1178 }
1179 reinit_parse_for_function ();
1180 store_parm_decls (); }
1181 /* This used to use compstmt_or_error.
1182 That caused a bug with input `f(g) int g {}',
1183 where the use of YYERROR1 above caused an error
1184 which then was handled by compstmt_or_error.
1185 There followed a repeated execution of that same rule,
1186 which called YYERROR1 again, and so on. */
1187 compstmt
1188 { finish_function (1);
1189 pop_c_function_context (); }
1190 ;
1192 notype_nested_function:
1193 notype_declarator
1194 { push_c_function_context ();
1195 if (! start_function (current_declspecs, $1, 1))
1196 {
1197 pop_c_function_context ();
1198 YYERROR1;
1199 }
1200 reinit_parse_for_function ();
1201 store_parm_decls (); }
1202 /* This used to use compstmt_or_error.
1203 That caused a bug with input `f(g) int g {}',
1204 where the use of YYERROR1 above caused an error
1205 which then was handled by compstmt_or_error.
1206 There followed a repeated execution of that same rule,
1207 which called YYERROR1 again, and so on. */
1208 compstmt
1209 { finish_function (1);
1210 pop_c_function_context (); }
1211 ;
1213 /* Any kind of declarator (thus, all declarators allowed
1214 after an explicit typespec). */
1216 declarator:
1217 after_type_declarator
1218 | notype_declarator
1219 ;
1221 /* A declarator that is allowed only after an explicit typespec. */
1223 after_type_declarator:
1224 '(' after_type_declarator ')'
1225 { $$ = $2; }
1226 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1227 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1228 /* | after_type_declarator '(' error ')' %prec '.'
1229 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1230 poplevel (0, 0, 0); } */
1231 | after_type_declarator '[' expr ']' %prec '.'
1232 { $$ = build_nt (ARRAY_REF, $1, $3); }
1233 | after_type_declarator '[' ']' %prec '.'
1234 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1235 | '*' type_quals after_type_declarator %prec UNARY
1236 { $$ = make_pointer_declarator ($2, $3); }
1237 | TYPENAME
1238 ifobjc
1239 | OBJECTNAME
1240 end ifobjc
1241 ;
1243 /* Kinds of declarator that can appear in a parameter list
1244 in addition to notype_declarator. This is like after_type_declarator
1245 but does not allow a typedef name in parentheses as an identifier
1246 (because it would conflict with a function with that typedef as arg). */
1248 parm_declarator:
1249 parm_declarator '(' parmlist_or_identifiers %prec '.'
1250 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1251 /* | parm_declarator '(' error ')' %prec '.'
1252 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1253 poplevel (0, 0, 0); } */
1254 | parm_declarator '[' expr ']' %prec '.'
1255 { $$ = build_nt (ARRAY_REF, $1, $3); }
1256 | parm_declarator '[' ']' %prec '.'
1257 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1258 | '*' type_quals parm_declarator %prec UNARY
1259 { $$ = make_pointer_declarator ($2, $3); }
1260 | TYPENAME
1261 ;
1263 /* A declarator allowed whether or not there has been
1264 an explicit typespec. These cannot redeclare a typedef-name. */
1266 notype_declarator:
1267 notype_declarator '(' parmlist_or_identifiers %prec '.'
1268 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1269 /* | notype_declarator '(' error ')' %prec '.'
1270 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1271 poplevel (0, 0, 0); } */
1272 | '(' notype_declarator ')'
1273 { $$ = $2; }
1274 | '*' type_quals notype_declarator %prec UNARY
1275 { $$ = make_pointer_declarator ($2, $3); }
1276 | notype_declarator '[' expr ']' %prec '.'
1277 { $$ = build_nt (ARRAY_REF, $1, $3); }
1278 | notype_declarator '[' ']' %prec '.'
1279 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1280 | IDENTIFIER
1281 ;
1283 structsp:
1284 STRUCT identifier '{'
1285 { $$ = start_struct (RECORD_TYPE, $2);
1286 /* Start scope of tag before parsing components. */
1287 }
1288 component_decl_list '}'
1289 { $$ = finish_struct ($<ttype>4, $5);
1290 /* Really define the structure. */
1291 }
1292 | STRUCT '{' component_decl_list '}'
1293 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1294 $3); }
1295 | STRUCT identifier
1296 { $$ = xref_tag (RECORD_TYPE, $2); }
1297 | UNION identifier '{'
1298 { $$ = start_struct (UNION_TYPE, $2); }
1299 component_decl_list '}'
1300 { $$ = finish_struct ($<ttype>4, $5); }
1301 | UNION '{' component_decl_list '}'
1302 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1303 $3); }
1304 | UNION identifier
1305 { $$ = xref_tag (UNION_TYPE, $2); }
1306 | ENUM identifier '{'
1307 { $<itype>3 = suspend_momentary ();
1308 $$ = start_enum ($2); }
1309 enumlist maybecomma_warn '}'
1310 { $$ = finish_enum ($<ttype>4, nreverse ($5));
1311 resume_momentary ($<itype>3); }
1312 | ENUM '{'
1313 { $<itype>2 = suspend_momentary ();
1314 $$ = start_enum (NULL_TREE); }
1315 enumlist maybecomma_warn '}'
1316 { $$ = finish_enum ($<ttype>3, nreverse ($4));
1317 resume_momentary ($<itype>2); }
1318 | ENUM identifier
1319 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1320 ;
1322 maybecomma:
1323 /* empty */
1324 | ','
1325 ;
1327 maybecomma_warn:
1328 /* empty */
1329 | ','
1330 { if (pedantic) pedwarn ("comma at end of enumerator list"); }
1331 ;
1333 component_decl_list:
1334 component_decl_list2
1335 { $$ = $1; }
1336 | component_decl_list2 component_decl
1337 { $$ = chainon ($1, $2);
1338 pedwarn ("no semicolon at end of struct or union"); }
1339 ;
1341 component_decl_list2: /* empty */
1342 { $$ = NULL_TREE; }
1343 | component_decl_list2 component_decl ';'
1344 { $$ = chainon ($1, $2); }
1345 | component_decl_list2 ';'
1346 { if (pedantic)
1347 pedwarn ("extra semicolon in struct or union specified"); }
1348 ifobjc
1349 /* foo(sizeof(struct{ @defs(ClassName)})); */
1350 | DEFS '(' CLASSNAME ')'
1351 {
1352 tree interface = lookup_interface ($3);
1354 if (interface)
1355 $$ = get_class_ivars (interface);
1356 else
1357 {
1358 error ("Cannot find interface declaration for `%s'",
1359 IDENTIFIER_POINTER ($3));
1360 $$ = NULL_TREE;
1361 }
1362 }
1363 end ifobjc
1364 ;
1366 /* There is a shift-reduce conflict here, because `components' may
1367 start with a `typename'. It happens that shifting (the default resolution)
1368 does the right thing, because it treats the `typename' as part of
1369 a `typed_typespecs'.
1371 It is possible that this same technique would allow the distinction
1372 between `notype_initdecls' and `initdecls' to be eliminated.
1373 But I am being cautious and not trying it. */
1375 component_decl:
1376 typed_typespecs setspecs components
1377 { $$ = $3;
1378 current_declspecs = TREE_VALUE (declspec_stack);
1379 declspec_stack = TREE_CHAIN (declspec_stack);
1380 resume_momentary ($2); }
1381 | typed_typespecs
1382 { if (pedantic)
1383 pedwarn ("ANSI C forbids member declarations with no members");
1384 shadow_tag($1);
1385 $$ = NULL_TREE; }
1386 | nonempty_type_quals setspecs components
1387 { $$ = $3;
1388 current_declspecs = TREE_VALUE (declspec_stack);
1389 declspec_stack = TREE_CHAIN (declspec_stack);
1390 resume_momentary ($2); }
1391 | nonempty_type_quals
1392 { if (pedantic)
1393 pedwarn ("ANSI C forbids member declarations with no members");
1394 shadow_tag($1);
1395 $$ = NULL_TREE; }
1396 | error
1397 { $$ = NULL_TREE; }
1398 ;
1400 components:
1401 component_declarator
1402 | components ',' component_declarator
1403 { $$ = chainon ($1, $3); }
1404 ;
1406 component_declarator:
1407 save_filename save_lineno declarator maybe_attribute
1408 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1409 decl_attributes ($$, $4); }
1410 | save_filename save_lineno
1411 declarator ':' expr_no_commas maybe_attribute
1412 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1413 decl_attributes ($$, $6); }
1414 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1415 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1416 decl_attributes ($$, $5); }
1417 ;
1419 /* We chain the enumerators in reverse order.
1420 They are put in forward order where enumlist is used.
1421 (The order used to be significant, but no longer is so.
1422 However, we still maintain the order, just to be clean.) */
1424 enumlist:
1425 enumerator
1426 | enumlist ',' enumerator
1427 { $$ = chainon ($3, $1); }
1428 ;
1431 enumerator:
1432 identifier
1433 { $$ = build_enumerator ($1, NULL_TREE); }
1434 | identifier '=' expr_no_commas
1435 { $$ = build_enumerator ($1, $3); }
1436 ;
1438 typename:
1439 typed_typespecs absdcl
1440 { $$ = build_tree_list ($1, $2); }
1441 | nonempty_type_quals absdcl
1442 { $$ = build_tree_list ($1, $2); }
1443 ;
1445 absdcl: /* an absolute declarator */
1446 /* empty */
1447 { $$ = NULL_TREE; }
1448 | absdcl1
1449 ;
1451 nonempty_type_quals:
1452 TYPE_QUAL
1453 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1454 | nonempty_type_quals TYPE_QUAL
1455 { $$ = tree_cons (NULL_TREE, $2, $1); }
1456 ;
1458 type_quals:
1459 /* empty */
1460 { $$ = NULL_TREE; }
1461 | type_quals TYPE_QUAL
1462 { $$ = tree_cons (NULL_TREE, $2, $1); }
1463 ;
1465 absdcl1: /* a nonempty absolute declarator */
1466 '(' absdcl1 ')'
1467 { $$ = $2; }
1468 /* `(typedef)1' is `int'. */
1469 | '*' type_quals absdcl1 %prec UNARY
1470 { $$ = make_pointer_declarator ($2, $3); }
1471 | '*' type_quals %prec UNARY
1472 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1473 | absdcl1 '(' parmlist %prec '.'
1474 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1475 | absdcl1 '[' expr ']' %prec '.'
1476 { $$ = build_nt (ARRAY_REF, $1, $3); }
1477 | absdcl1 '[' ']' %prec '.'
1478 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1479 | '(' parmlist %prec '.'
1480 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1481 | '[' expr ']' %prec '.'
1482 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1483 | '[' ']' %prec '.'
1484 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1485 ;
1487 /* at least one statement, the first of which parses without error. */
1488 /* stmts is used only after decls, so an invalid first statement
1489 is actually regarded as an invalid decl and part of the decls. */
1491 stmts:
1492 lineno_stmt_or_label
1493 | stmts lineno_stmt_or_label
1494 | stmts errstmt
1495 ;
1497 xstmts:
1498 /* empty */
1499 | stmts
1500 ;
1502 errstmt: error ';'
1503 ;
1505 pushlevel: /* empty */
1506 { emit_line_note (input_filename, lineno);
1507 pushlevel (0);
1508 clear_last_expr ();
1509 push_momentary ();
1510 expand_start_bindings (0);
1511 ifobjc
1512 if (objc_method_context)
1513 add_objc_decls ();
1514 end ifobjc
1515 }
1516 ;
1518 /* Read zero or more forward-declarations for labels
1519 that nested functions can jump to. */
1520 maybe_label_decls:
1521 /* empty */
1522 | label_decls
1523 { if (pedantic)
1524 pedwarn ("ANSI C forbids label declarations"); }
1525 ;
1527 label_decls:
1528 label_decl
1529 | label_decls label_decl
1530 ;
1532 label_decl:
1533 LABEL identifiers_or_typenames ';'
1534 { tree link;
1535 for (link = $2; link; link = TREE_CHAIN (link))
1536 {
1537 tree label = shadow_label (TREE_VALUE (link));
1538 C_DECLARED_LABEL_FLAG (label) = 1;
1539 declare_nonlocal_label (label);
1540 }
1541 }
1542 ;
1544 /* This is the body of a function definition.
1545 It causes syntax errors to ignore to the next openbrace. */
1546 compstmt_or_error:
1547 compstmt
1548 {}
1549 | error compstmt
1550 ;
1552 compstmt: '{' '}'
1553 { $$ = convert (void_type_node, integer_zero_node); }
1554 | '{' pushlevel maybe_label_decls decls xstmts '}'
1555 { emit_line_note (input_filename, lineno);
1556 expand_end_bindings (getdecls (), 1, 0);
1557 $$ = poplevel (1, 1, 0);
1558 pop_momentary (); }
1559 | '{' pushlevel maybe_label_decls error '}'
1560 { emit_line_note (input_filename, lineno);
1561 expand_end_bindings (getdecls (), kept_level_p (), 0);
1562 $$ = poplevel (kept_level_p (), 0, 0);
1563 pop_momentary (); }
1564 | '{' pushlevel maybe_label_decls stmts '}'
1565 { emit_line_note (input_filename, lineno);
1566 expand_end_bindings (getdecls (), kept_level_p (), 0);
1567 $$ = poplevel (kept_level_p (), 0, 0);
1568 pop_momentary (); }
1569 ;
1571 /* Value is number of statements counted as of the closeparen. */
1572 simple_if:
1573 if_prefix lineno_labeled_stmt
1574 /* Make sure expand_end_cond is run once
1575 for each call to expand_start_cond.
1576 Otherwise a crash is likely. */
1577 | if_prefix error
1578 ;
1580 if_prefix:
1581 IF '(' expr ')'
1582 { emit_line_note ($<filename>-1, $<lineno>0);
1583 expand_start_cond (truthvalue_conversion ($3), 0);
1584 $<itype>$ = stmt_count;
1585 if_stmt_file = $<filename>-1;
1586 if_stmt_line = $<lineno>0;
1587 position_after_white_space (); }
1588 ;
1590 /* This is a subroutine of stmt.
1591 It is used twice, once for valid DO statements
1592 and once for catching errors in parsing the end test. */
1593 do_stmt_start:
1594 DO
1595 { stmt_count++;
1596 emit_line_note ($<filename>-1, $<lineno>0);
1597 /* See comment in `while' alternative, above. */
1598 emit_nop ();
1599 expand_start_loop_continue_elsewhere (1);
1600 position_after_white_space (); }
1601 lineno_labeled_stmt WHILE
1602 { expand_loop_continue_here (); }
1603 ;
1605 save_filename:
1606 { $$ = input_filename; }
1607 ;
1609 save_lineno:
1610 { $$ = lineno; }
1611 ;
1613 lineno_labeled_stmt:
1614 save_filename save_lineno stmt
1615 { }
1616 /* | save_filename save_lineno error
1617 { }
1618 */
1619 | save_filename save_lineno label lineno_labeled_stmt
1620 { }
1621 ;
1623 lineno_stmt_or_label:
1624 save_filename save_lineno stmt_or_label
1625 { }
1626 ;
1628 stmt_or_label:
1629 stmt
1630 | label
1631 { int next;
1632 position_after_white_space ();
1633 next = getc (finput);
1634 ungetc (next, finput);
1635 if (pedantic && next == '}')
1636 pedwarn ("ANSI C forbids label at end of compound statement");
1637 }
1638 ;
1640 /* Parse a single real statement, not including any labels. */
1641 stmt:
1642 compstmt
1643 { stmt_count++; }
1644 | all_iter_stmt
1645 | expr ';'
1646 { stmt_count++;
1647 emit_line_note ($<filename>-1, $<lineno>0);
1648 /* Call default_conversion to get an error
1649 on referring to a register array if pedantic. */
1650 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1651 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1652 $1 = default_conversion ($1);
1653 iterator_expand ($1);
1654 clear_momentary (); }
1655 | simple_if ELSE
1656 { expand_start_else ();
1657 $<itype>1 = stmt_count;
1658 position_after_white_space (); }
1659 lineno_labeled_stmt
1660 { expand_end_cond ();
1661 if (extra_warnings && stmt_count == $<itype>1)
1662 warning ("empty body in an else-statement"); }
1663 | simple_if %prec IF
1664 { expand_end_cond ();
1665 /* This warning is here instead of in simple_if, because we
1666 do not want a warning if an empty if is followed by an
1667 else statement. */
1668 if (extra_warnings && stmt_count == $<itype>1)
1669 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1670 "empty body in an if-statement"); }
1671 /* Make sure expand_end_cond is run once
1672 for each call to expand_start_cond.
1673 Otherwise a crash is likely. */
1674 | simple_if ELSE error
1675 { expand_end_cond (); }
1676 | WHILE
1677 { stmt_count++;
1678 emit_line_note ($<filename>-1, $<lineno>0);
1679 /* The emit_nop used to come before emit_line_note,
1680 but that made the nop seem like part of the preceding line.
1681 And that was confusing when the preceding line was
1682 inside of an if statement and was not really executed.
1683 I think it ought to work to put the nop after the line number.
1684 We will see. --rms, July 15, 1991. */
1685 emit_nop (); }
1686 '(' expr ')'
1687 { /* Don't start the loop till we have succeeded
1688 in parsing the end test. This is to make sure
1689 that we end every loop we start. */
1690 expand_start_loop (1);
1691 emit_line_note (input_filename, lineno);
1692 expand_exit_loop_if_false (NULL_PTR,
1693 truthvalue_conversion ($4));
1694 position_after_white_space (); }
1695 lineno_labeled_stmt
1696 { expand_end_loop (); }
1697 | do_stmt_start
1698 '(' expr ')' ';'
1699 { emit_line_note (input_filename, lineno);
1700 expand_exit_loop_if_false (NULL_PTR,
1701 truthvalue_conversion ($3));
1702 expand_end_loop ();
1703 clear_momentary (); }
1704 /* This rule is needed to make sure we end every loop we start. */
1705 | do_stmt_start error
1706 { expand_end_loop ();
1707 clear_momentary (); }
1708 | FOR
1709 '(' xexpr ';'
1710 { stmt_count++;
1711 emit_line_note ($<filename>-1, $<lineno>0);
1712 /* See comment in `while' alternative, above. */
1713 emit_nop ();
1714 if ($3) c_expand_expr_stmt ($3);
1715 /* Next step is to call expand_start_loop_continue_elsewhere,
1716 but wait till after we parse the entire for (...).
1717 Otherwise, invalid input might cause us to call that
1718 fn without calling expand_end_loop. */
1719 }
1720 xexpr ';'
1721 /* Can't emit now; wait till after expand_start_loop... */
1722 { $<lineno>7 = lineno;
1723 $<filename>$ = input_filename; }
1724 xexpr ')'
1725 {
1726 /* Start the loop. Doing this after parsing
1727 all the expressions ensures we will end the loop. */
1728 expand_start_loop_continue_elsewhere (1);
1729 /* Emit the end-test, with a line number. */
1730 emit_line_note ($<filename>8, $<lineno>7);
1731 if ($6)
1732 expand_exit_loop_if_false (NULL_PTR,
1733 truthvalue_conversion ($6));
1734 /* Don't let the tree nodes for $9 be discarded by
1735 clear_momentary during the parsing of the next stmt. */
1736 push_momentary ();
1737 $<lineno>7 = lineno;
1738 $<filename>8 = input_filename;
1739 position_after_white_space (); }
1740 lineno_labeled_stmt
1741 { /* Emit the increment expression, with a line number. */
1742 emit_line_note ($<filename>8, $<lineno>7);
1743 expand_loop_continue_here ();
1744 if ($9)
1745 c_expand_expr_stmt ($9);
1746 pop_momentary ();
1747 expand_end_loop (); }
1748 | SWITCH '(' expr ')'
1749 { stmt_count++;
1750 emit_line_note ($<filename>-1, $<lineno>0);
1751 c_expand_start_case ($3);
1752 /* Don't let the tree nodes for $3 be discarded by
1753 clear_momentary during the parsing of the next stmt. */
1754 push_momentary ();
1755 position_after_white_space (); }
1756 lineno_labeled_stmt
1757 { expand_end_case ($3);
1758 pop_momentary (); }
1759 | BREAK ';'
1760 { stmt_count++;
1761 emit_line_note ($<filename>-1, $<lineno>0);
1762 if ( ! expand_exit_something ())
1763 error ("break statement not within loop or switch"); }
1764 | CONTINUE ';'
1765 { stmt_count++;
1766 emit_line_note ($<filename>-1, $<lineno>0);
1767 if (! expand_continue_loop (NULL_PTR))
1768 error ("continue statement not within a loop"); }
1769 | RETURN ';'
1770 { stmt_count++;
1771 emit_line_note ($<filename>-1, $<lineno>0);
1772 c_expand_return (NULL_TREE); }
1773 | RETURN expr ';'
1774 { stmt_count++;
1775 emit_line_note ($<filename>-1, $<lineno>0);
1776 c_expand_return ($2); }
1777 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1778 { stmt_count++;
1779 emit_line_note ($<filename>-1, $<lineno>0);
1780 STRIP_NOPS ($4);
1781 if ((TREE_CODE ($4) == ADDR_EXPR
1782 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1783 || TREE_CODE ($4) == STRING_CST)
1784 expand_asm ($4);
1785 else
1786 error ("argument of `asm' is not a constant string"); }
1787 /* This is the case with just output operands. */
1788 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1789 { stmt_count++;
1790 emit_line_note ($<filename>-1, $<lineno>0);
1791 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1792 $2 == ridpointers[(int)RID_VOLATILE],
1793 input_filename, lineno); }
1794 /* This is the case with input operands as well. */
1795 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1796 { stmt_count++;
1797 emit_line_note ($<filename>-1, $<lineno>0);
1798 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1799 $2 == ridpointers[(int)RID_VOLATILE],
1800 input_filename, lineno); }
1801 /* This is the case with clobbered registers as well. */
1802 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1803 asm_operands ':' asm_clobbers ')' ';'
1804 { stmt_count++;
1805 emit_line_note ($<filename>-1, $<lineno>0);
1806 c_expand_asm_operands ($4, $6, $8, $10,
1807 $2 == ridpointers[(int)RID_VOLATILE],
1808 input_filename, lineno); }
1809 | GOTO identifier ';'
1810 { tree decl;
1811 stmt_count++;
1812 emit_line_note ($<filename>-1, $<lineno>0);
1813 decl = lookup_label ($2);
1814 if (decl != 0)
1815 {
1816 TREE_USED (decl) = 1;
1817 expand_goto (decl);
1818 }
1819 }
1820 | GOTO '*' expr ';'
1821 { stmt_count++;
1822 emit_line_note ($<filename>-1, $<lineno>0);
1823 expand_computed_goto (convert (ptr_type_node, $3)); }
1824 | ';'
1825 ;
1827 all_iter_stmt:
1828 all_iter_stmt_simple
1829 /* | all_iter_stmt_with_decl */
1830 ;
1832 all_iter_stmt_simple:
1833 FOR '(' primary ')'
1834 {
1835 /* The value returned by this action is */
1836 /* 1 if everything is OK */
1837 /* 0 in case of error or already bound iterator */
1839 $<itype>$ = 0;
1840 if (TREE_CODE ($3) != VAR_DECL)
1841 error ("invalid `for (ITERATOR)' syntax");
1842 else if (! ITERATOR_P ($3))
1843 error ("`%s' is not an iterator",
1844 IDENTIFIER_POINTER (DECL_NAME ($3)));
1845 else if (ITERATOR_BOUND_P ($3))
1846 error ("`for (%s)' inside expansion of same iterator",
1847 IDENTIFIER_POINTER (DECL_NAME ($3)));
1848 else
1849 {
1850 $<itype>$ = 1;
1851 iterator_for_loop_start ($3);
1852 }
1853 }
1854 lineno_labeled_stmt
1855 {
1856 if ($<itype>5)
1857 iterator_for_loop_end ($3);
1858 }
1860 /* This really should allow any kind of declaration,
1861 for generality. Fix it before turning it back on.
1863 all_iter_stmt_with_decl:
1864 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1865 {
1866 */ /* The value returned by this action is */
1867 /* 1 if everything is OK */
1868 /* 0 in case of error or already bound iterator */
1869 /*
1870 iterator_for_loop_start ($6);
1871 }
1872 lineno_labeled_stmt
1873 {
1874 iterator_for_loop_end ($6);
1875 emit_line_note (input_filename, lineno);
1876 expand_end_bindings (getdecls (), 1, 0);
1877 $<ttype>$ = poplevel (1, 1, 0);
1878 pop_momentary ();
1879 }
1880 */
1882 /* Any kind of label, including jump labels and case labels.
1883 ANSI C accepts labels only before statements, but we allow them
1884 also at the end of a compound statement. */
1886 label: CASE expr_no_commas ':'
1887 { register tree value = check_case_value ($2);
1888 register tree label
1889 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1891 stmt_count++;
1893 if (value != error_mark_node)
1894 {
1895 tree duplicate;
1896 int success = pushcase (value, convert_and_check,
1897 label, &duplicate);
1898 if (success == 1)
1899 error ("case label not within a switch statement");
1900 else if (success == 2)
1901 {
1902 error ("duplicate case value");
1903 error_with_decl (duplicate, "this is the first entry for that value");
1904 }
1905 else if (success == 3)
1906 warning ("case value out of range");
1907 else if (success == 5)
1908 error ("case label within scope of cleanup or variable array");
1909 }
1910 position_after_white_space (); }
1911 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
1912 { register tree value1 = check_case_value ($2);
1913 register tree value2 = check_case_value ($4);
1914 register tree label
1915 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1917 stmt_count++;
1919 if (value1 != error_mark_node && value2 != error_mark_node)
1920 {
1921 tree duplicate;
1922 int success = pushcase_range (value1, value2,
1923 convert_and_check, label,
1924 &duplicate);
1925 if (success == 1)
1926 error ("case label not within a switch statement");
1927 else if (success == 2)
1928 {
1929 error ("duplicate case value");
1930 error_with_decl (duplicate, "this is the first entry for that value");
1931 }
1932 else if (success == 3)
1933 warning ("case value out of range");
1934 else if (success == 4)
1935 warning ("empty case range");
1936 else if (success == 5)
1937 error ("case label within scope of cleanup or variable array");
1938 }
1939 position_after_white_space (); }
1940 | DEFAULT ':'
1941 {
1942 tree duplicate;
1943 register tree label
1944 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1945 int success = pushcase (NULL_TREE, 0, label, &duplicate);
1946 stmt_count++;
1947 if (success == 1)
1948 error ("default label not within a switch statement");
1949 else if (success == 2)
1950 {
1951 error ("multiple default labels in one switch");
1952 error_with_decl (duplicate, "this is the first default label");
1953 }
1954 position_after_white_space (); }
1955 | identifier ':'
1956 { tree label = define_label (input_filename, lineno, $1);
1957 stmt_count++;
1958 emit_nop ();
1959 if (label)
1960 expand_label (label);
1961 position_after_white_space (); }
1962 ;
1964 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
1966 maybe_type_qual:
1967 /* empty */
1968 { emit_line_note (input_filename, lineno); }
1969 | TYPE_QUAL
1970 { emit_line_note (input_filename, lineno); }
1971 ;
1973 xexpr:
1974 /* empty */
1975 { $$ = NULL_TREE; }
1976 | expr
1977 ;
1979 /* These are the operands other than the first string and colon
1980 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
1981 asm_operands: /* empty */
1982 { $$ = NULL_TREE; }
1983 | nonnull_asm_operands
1984 ;
1986 nonnull_asm_operands:
1987 asm_operand
1988 | nonnull_asm_operands ',' asm_operand
1989 { $$ = chainon ($1, $3); }
1990 ;
1992 asm_operand:
1993 STRING '(' expr ')'
1994 { $$ = build_tree_list ($1, $3); }
1995 ;
1997 asm_clobbers:
1998 string
1999 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2000 | asm_clobbers ',' string
2001 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2002 ;
2003 \f
2004 /* This is what appears inside the parens in a function declarator.
2005 Its value is a list of ..._TYPE nodes. */
2006 parmlist:
2007 { pushlevel (0);
2008 clear_parm_order ();
2009 declare_parm_level (0); }
2010 parmlist_1
2011 { $$ = $2;
2012 parmlist_tags_warning ();
2013 poplevel (0, 0, 0); }
2014 ;
2016 parmlist_1:
2017 parmlist_2 ')'
2018 | parms ';'
2019 { tree parm;
2020 if (pedantic)
2021 pedwarn ("ANSI C forbids forward parameter declarations");
2022 /* Mark the forward decls as such. */
2023 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2024 TREE_ASM_WRITTEN (parm) = 1;
2025 clear_parm_order (); }
2026 parmlist_1
2027 { $$ = $4; }
2028 | error ')'
2029 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2030 ;
2032 /* This is what appears inside the parens in a function declarator.
2033 Is value is represented in the format that grokdeclarator expects. */
2034 parmlist_2: /* empty */
2035 { $$ = get_parm_info (0); }
2036 | ELLIPSIS
2037 { $$ = get_parm_info (0);
2038 if (pedantic)
2039 pedwarn ("ANSI C requires a named argument before `...'");
2040 }
2041 | parms
2042 { $$ = get_parm_info (1); }
2043 | parms ',' ELLIPSIS
2044 { $$ = get_parm_info (0); }
2045 ;
2047 parms:
2048 parm
2049 { push_parm_decl ($1); }
2050 | parms ',' parm
2051 { push_parm_decl ($3); }
2052 ;
2054 /* A single parameter declaration or parameter type name,
2055 as found in a parmlist. */
2056 parm:
2057 typed_declspecs parm_declarator
2058 { $$ = build_tree_list ($1, $2) ; }
2059 | typed_declspecs notype_declarator
2060 { $$ = build_tree_list ($1, $2) ; }
2061 | typed_declspecs absdcl
2062 { $$ = build_tree_list ($1, $2); }
2063 | declmods notype_declarator
2064 { $$ = build_tree_list ($1, $2) ; }
2065 | declmods absdcl
2066 { $$ = build_tree_list ($1, $2); }
2067 ;
2069 /* This is used in a function definition
2070 where either a parmlist or an identifier list is ok.
2071 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2072 parmlist_or_identifiers:
2073 { pushlevel (0);
2074 clear_parm_order ();
2075 declare_parm_level (1); }
2076 parmlist_or_identifiers_1
2077 { $$ = $2;
2078 parmlist_tags_warning ();
2079 poplevel (0, 0, 0); }
2080 ;
2082 parmlist_or_identifiers_1:
2083 parmlist_1
2084 | identifiers ')'
2085 { tree t;
2086 for (t = $1; t; t = TREE_CHAIN (t))
2087 if (TREE_VALUE (t) == NULL_TREE)
2088 error ("`...' in old-style identifier list");
2089 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2090 ;
2092 /* A nonempty list of identifiers. */
2093 identifiers:
2094 IDENTIFIER
2095 { $$ = build_tree_list (NULL_TREE, $1); }
2096 | identifiers ',' IDENTIFIER
2097 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2098 ;
2100 /* A nonempty list of identifiers, including typenames. */
2101 identifiers_or_typenames:
2102 identifier
2103 { $$ = build_tree_list (NULL_TREE, $1); }
2104 | identifiers_or_typenames ',' identifier
2105 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2106 ;
2107 \f
2108 ifobjc
2109 /* Objective-C productions. */
2111 objcdef:
2112 classdef
2113 | classdecl
2114 | aliasdecl
2115 | protocoldef
2116 | methoddef
2117 | END
2118 {
2119 if (objc_implementation_context)
2120 {
2121 finish_class (objc_implementation_context);
2122 objc_ivar_chain = NULL_TREE;
2123 objc_implementation_context = NULL_TREE;
2124 }
2125 else
2126 warning ("`@end' must appear in an implementation context");
2127 }
2128 ;
2130 /* A nonempty list of identifiers. */
2131 identifier_list:
2132 identifier
2133 { $$ = build_tree_list (NULL_TREE, $1); }
2134 | identifier_list ',' identifier
2135 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2136 ;
2138 classdecl:
2139 CLASS identifier_list ';'
2140 {
2141 objc_declare_class ($2);
2142 }
2144 aliasdecl:
2145 ALIAS identifier identifier ';'
2146 {
2147 objc_declare_alias ($2, $3);
2148 }
2150 classdef:
2151 INTERFACE identifier protocolrefs '{'
2152 {
2153 objc_interface_context = objc_ivar_context
2154 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2155 objc_public_flag = 0;
2156 }
2157 ivar_decl_list '}'
2158 {
2159 continue_class (objc_interface_context);
2160 }
2161 methodprotolist
2162 END
2163 {
2164 finish_class (objc_interface_context);
2165 objc_interface_context = NULL_TREE;
2166 }
2168 | INTERFACE identifier protocolrefs
2169 {
2170 objc_interface_context
2171 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2172 continue_class (objc_interface_context);
2173 }
2174 methodprotolist
2175 END
2176 {
2177 finish_class (objc_interface_context);
2178 objc_interface_context = NULL_TREE;
2179 }
2181 | INTERFACE identifier ':' identifier protocolrefs '{'
2182 {
2183 objc_interface_context = objc_ivar_context
2184 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2185 objc_public_flag = 0;
2186 }
2187 ivar_decl_list '}'
2188 {
2189 continue_class (objc_interface_context);
2190 }
2191 methodprotolist
2192 END
2193 {
2194 finish_class (objc_interface_context);
2195 objc_interface_context = NULL_TREE;
2196 }
2198 | INTERFACE identifier ':' identifier protocolrefs
2199 {
2200 objc_interface_context
2201 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2202 continue_class (objc_interface_context);
2203 }
2204 methodprotolist
2205 END
2206 {
2207 finish_class (objc_interface_context);
2208 objc_interface_context = NULL_TREE;
2209 }
2211 | IMPLEMENTATION identifier '{'
2212 {
2213 objc_implementation_context = objc_ivar_context
2214 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2215 objc_public_flag = 0;
2216 }
2217 ivar_decl_list '}'
2218 {
2219 objc_ivar_chain
2220 = continue_class (objc_implementation_context);
2221 }
2223 | IMPLEMENTATION identifier
2224 {
2225 objc_implementation_context
2226 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2227 objc_ivar_chain
2228 = continue_class (objc_implementation_context);
2229 }
2231 | IMPLEMENTATION identifier ':' identifier '{'
2232 {
2233 objc_implementation_context = objc_ivar_context
2234 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2235 objc_public_flag = 0;
2236 }
2237 ivar_decl_list '}'
2238 {
2239 objc_ivar_chain
2240 = continue_class (objc_implementation_context);
2241 }
2243 | IMPLEMENTATION identifier ':' identifier
2244 {
2245 objc_implementation_context
2246 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2247 objc_ivar_chain
2248 = continue_class (objc_implementation_context);
2249 }
2251 | INTERFACE identifier '(' identifier ')' protocolrefs
2252 {
2253 objc_interface_context
2254 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2255 continue_class (objc_interface_context);
2256 }
2257 methodprotolist
2258 END
2259 {
2260 finish_class (objc_interface_context);
2261 objc_interface_context = NULL_TREE;
2262 }
2264 | IMPLEMENTATION identifier '(' identifier ')'
2265 {
2266 objc_implementation_context
2267 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2268 objc_ivar_chain
2269 = continue_class (objc_implementation_context);
2270 }
2271 ;
2273 protocoldef:
2274 PROTOCOL identifier protocolrefs
2275 {
2276 remember_protocol_qualifiers ();
2277 objc_interface_context
2278 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2279 }
2280 methodprotolist END
2281 {
2282 forget_protocol_qualifiers();
2283 finish_protocol(objc_interface_context);
2284 objc_interface_context = NULL_TREE;
2285 }
2286 ;
2288 protocolrefs:
2289 /* empty */
2290 {
2291 $$ = NULL_TREE;
2292 }
2293 | ARITHCOMPARE identifier_list ARITHCOMPARE
2294 {
2295 if ($1 == LT_EXPR && $3 == GT_EXPR)
2296 $$ = $2;
2297 else
2298 YYERROR1;
2299 }
2300 ;
2302 ivar_decl_list:
2303 ivar_decl_list visibility_spec ivar_decls
2304 | ivar_decls
2305 ;
2307 visibility_spec:
2308 PRIVATE { objc_public_flag = 2; }
2309 | PROTECTED { objc_public_flag = 0; }
2310 | PUBLIC { objc_public_flag = 1; }
2311 ;
2313 ivar_decls:
2314 /* empty */
2315 {
2316 $$ = NULL_TREE;
2317 }
2318 | ivar_decls ivar_decl ';'
2319 | ivar_decls ';'
2320 {
2321 if (pedantic)
2322 pedwarn ("extra semicolon in struct or union specified");
2323 }
2324 ;
2327 /* There is a shift-reduce conflict here, because `components' may
2328 start with a `typename'. It happens that shifting (the default resolution)
2329 does the right thing, because it treats the `typename' as part of
2330 a `typed_typespecs'.
2332 It is possible that this same technique would allow the distinction
2333 between `notype_initdecls' and `initdecls' to be eliminated.
2334 But I am being cautious and not trying it. */
2336 ivar_decl:
2337 typed_typespecs setspecs ivars
2338 {
2339 $$ = $3;
2340 resume_momentary ($2);
2341 }
2342 | nonempty_type_quals setspecs ivars
2343 {
2344 $$ = $3;
2345 resume_momentary ($2);
2346 }
2347 | error
2348 { $$ = NULL_TREE; }
2349 ;
2351 ivars:
2352 /* empty */
2353 { $$ = NULL_TREE; }
2354 | ivar_declarator
2355 | ivars ',' ivar_declarator
2356 ;
2358 ivar_declarator:
2359 declarator
2360 {
2361 $$ = add_instance_variable (objc_ivar_context,
2362 objc_public_flag,
2363 $1, current_declspecs,
2364 NULL_TREE);
2365 }
2366 | declarator ':' expr_no_commas
2367 {
2368 $$ = add_instance_variable (objc_ivar_context,
2369 objc_public_flag,
2370 $1, current_declspecs, $3);
2371 }
2372 | ':' expr_no_commas
2373 {
2374 $$ = add_instance_variable (objc_ivar_context,
2375 objc_public_flag,
2376 NULL_TREE,
2377 current_declspecs, $2);
2378 }
2379 ;
2381 methoddef:
2382 '+'
2383 {
2384 remember_protocol_qualifiers ();
2385 if (objc_implementation_context)
2386 objc_inherit_code = CLASS_METHOD_DECL;
2387 else
2388 fatal ("method definition not in class context");
2389 }
2390 methoddecl
2391 {
2392 forget_protocol_qualifiers ();
2393 add_class_method (objc_implementation_context, $3);
2394 start_method_def ($3);
2395 objc_method_context = $3;
2396 }
2397 optarglist
2398 {
2399 continue_method_def ();
2400 }
2401 compstmt_or_error
2402 {
2403 finish_method_def ();
2404 objc_method_context = NULL_TREE;
2405 }
2407 | '-'
2408 {
2409 remember_protocol_qualifiers ();
2410 if (objc_implementation_context)
2411 objc_inherit_code = INSTANCE_METHOD_DECL;
2412 else
2413 fatal ("method definition not in class context");
2414 }
2415 methoddecl
2416 {
2417 forget_protocol_qualifiers ();
2418 add_instance_method (objc_implementation_context, $3);
2419 start_method_def ($3);
2420 objc_method_context = $3;
2421 }
2422 optarglist
2423 {
2424 continue_method_def ();
2425 }
2426 compstmt_or_error
2427 {
2428 finish_method_def ();
2429 objc_method_context = NULL_TREE;
2430 }
2431 ;
2433 /* the reason for the strange actions in this rule
2434 is so that notype_initdecls when reached via datadef
2435 can find a valid list of type and sc specs in $0. */
2437 methodprotolist:
2438 /* empty */
2439 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2440 ;
2442 methodprotolist2: /* eliminates a shift/reduce conflict */
2443 methodproto
2444 | datadef
2445 | methodprotolist2 methodproto
2446 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2447 ;
2449 semi_or_error:
2450 ';'
2451 | error
2452 ;
2454 methodproto:
2455 '+'
2456 {
2457 objc_inherit_code = CLASS_METHOD_DECL;
2458 }
2459 methoddecl
2460 {
2461 add_class_method (objc_interface_context, $3);
2462 }
2463 semi_or_error
2465 | '-'
2466 {
2467 objc_inherit_code = INSTANCE_METHOD_DECL;
2468 }
2469 methoddecl
2470 {
2471 add_instance_method (objc_interface_context, $3);
2472 }
2473 semi_or_error
2474 ;
2476 methoddecl:
2477 '(' typename ')' unaryselector
2478 {
2479 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2480 }
2482 | unaryselector
2483 {
2484 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2485 }
2487 | '(' typename ')' keywordselector optparmlist
2488 {
2489 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2490 }
2492 | keywordselector optparmlist
2493 {
2494 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2495 }
2496 ;
2498 /* "optarglist" assumes that start_method_def has already been called...
2499 if it is not, the "xdecls" will not be placed in the proper scope */
2501 optarglist:
2502 /* empty */
2503 | ';' myxdecls
2504 ;
2506 /* to get around the following situation: "int foo (int a) int b; {}" that
2507 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2509 myxdecls:
2510 /* empty */
2511 | mydecls
2512 ;
2514 mydecls:
2515 mydecl
2516 | errstmt
2517 | mydecls mydecl
2518 | mydecl errstmt
2519 ;
2521 mydecl:
2522 typed_declspecs setspecs myparms ';'
2523 { resume_momentary ($2); }
2524 | typed_declspecs ';'
2525 { shadow_tag ($1); }
2526 | declmods ';'
2527 { pedwarn ("empty declaration"); }
2528 ;
2530 myparms:
2531 myparm
2532 { push_parm_decl ($1); }
2533 | myparms ',' myparm
2534 { push_parm_decl ($3); }
2535 ;
2537 /* A single parameter declaration or parameter type name,
2538 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2540 myparm:
2541 parm_declarator
2542 { $$ = build_tree_list (current_declspecs, $1) ; }
2543 | notype_declarator
2544 { $$ = build_tree_list (current_declspecs, $1) ; }
2545 | absdcl
2546 { $$ = build_tree_list (current_declspecs, $1) ; }
2547 ;
2549 optparmlist:
2550 /* empty */
2551 {
2552 $$ = NULL_TREE;
2553 }
2554 | ',' ELLIPSIS
2555 {
2556 /* oh what a kludge! */
2557 $$ = (tree)1;
2558 }
2559 | ','
2560 {
2561 pushlevel (0);
2562 }
2563 parmlist_2
2564 {
2565 /* returns a tree list node generated by get_parm_info */
2566 $$ = $3;
2567 poplevel (0, 0, 0);
2568 }
2569 ;
2571 unaryselector:
2572 selector
2573 ;
2575 keywordselector:
2576 keyworddecl
2578 | keywordselector keyworddecl
2579 {
2580 $$ = chainon ($1, $2);
2581 }
2582 ;
2584 selector:
2585 IDENTIFIER
2586 | TYPENAME
2587 | OBJECTNAME
2588 | reservedwords
2589 ;
2591 reservedwords:
2592 ENUM { $$ = get_identifier (token_buffer); }
2593 | STRUCT { $$ = get_identifier (token_buffer); }
2594 | UNION { $$ = get_identifier (token_buffer); }
2595 | IF { $$ = get_identifier (token_buffer); }
2596 | ELSE { $$ = get_identifier (token_buffer); }
2597 | WHILE { $$ = get_identifier (token_buffer); }
2598 | DO { $$ = get_identifier (token_buffer); }
2599 | FOR { $$ = get_identifier (token_buffer); }
2600 | SWITCH { $$ = get_identifier (token_buffer); }
2601 | CASE { $$ = get_identifier (token_buffer); }
2602 | DEFAULT { $$ = get_identifier (token_buffer); }
2603 | BREAK { $$ = get_identifier (token_buffer); }
2604 | CONTINUE { $$ = get_identifier (token_buffer); }
2605 | RETURN { $$ = get_identifier (token_buffer); }
2606 | GOTO { $$ = get_identifier (token_buffer); }
2607 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2608 | SIZEOF { $$ = get_identifier (token_buffer); }
2609 | TYPEOF { $$ = get_identifier (token_buffer); }
2610 | ALIGNOF { $$ = get_identifier (token_buffer); }
2611 | TYPESPEC | TYPE_QUAL
2612 ;
2614 keyworddecl:
2615 selector ':' '(' typename ')' identifier
2616 {
2617 $$ = build_keyword_decl ($1, $4, $6);
2618 }
2620 | selector ':' identifier
2621 {
2622 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2623 }
2625 | ':' '(' typename ')' identifier
2626 {
2627 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2628 }
2630 | ':' identifier
2631 {
2632 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2633 }
2634 ;
2636 messageargs:
2637 selector
2638 | keywordarglist
2639 ;
2641 keywordarglist:
2642 keywordarg
2643 | keywordarglist keywordarg
2644 {
2645 $$ = chainon ($1, $2);
2646 }
2647 ;
2650 keywordexpr:
2651 nonnull_exprlist
2652 {
2653 if (TREE_CHAIN ($1) == NULL_TREE)
2654 /* just return the expr., remove a level of indirection */
2655 $$ = TREE_VALUE ($1);
2656 else
2657 /* we have a comma expr., we will collapse later */
2658 $$ = $1;
2659 }
2660 ;
2662 keywordarg:
2663 selector ':' keywordexpr
2664 {
2665 $$ = build_tree_list ($1, $3);
2666 }
2667 | ':' keywordexpr
2668 {
2669 $$ = build_tree_list (NULL_TREE, $2);
2670 }
2671 ;
2673 receiver:
2674 expr
2675 | CLASSNAME
2676 {
2677 $$ = get_class_reference ($1);
2678 }
2679 ;
2681 objcmessageexpr:
2682 '['
2683 { objc_receiver_context = 1; }
2684 receiver
2685 { objc_receiver_context = 0; }
2686 messageargs ']'
2687 {
2688 $$ = build_tree_list ($3, $5);
2689 }
2690 ;
2692 selectorarg:
2693 selector
2694 | keywordnamelist
2695 ;
2697 keywordnamelist:
2698 keywordname
2699 | keywordnamelist keywordname
2700 {
2701 $$ = chainon ($1, $2);
2702 }
2703 ;
2705 keywordname:
2706 selector ':'
2707 {
2708 $$ = build_tree_list ($1, NULL_TREE);
2709 }
2710 | ':'
2711 {
2712 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2713 }
2714 ;
2716 objcselectorexpr:
2717 SELECTOR '(' selectorarg ')'
2718 {
2719 $$ = $3;
2720 }
2721 ;
2723 objcprotocolexpr:
2724 PROTOCOL '(' identifier ')'
2725 {
2726 $$ = $3;
2727 }
2728 ;
2730 /* extension to support C-structures in the archiver */
2732 objcencodeexpr:
2733 ENCODE '(' typename ')'
2734 {
2735 $$ = groktypename ($3);
2736 }
2737 ;
2739 end ifobjc
2740 %%