1 /* YACC parser for C syntax and for Objective C. -*-c-*-
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This file defines the grammar of C and that of Objective C.
23 ifobjc ... end ifobjc conditionals contain code for Objective C only.
24 ifc ... end ifc conditionals contain code for C only.
25 Sed commands in Makefile.in are used to convert this file into
26 c-parse.y and into objc-parse.y. */
28 /* To whomever it may concern: I have heard that such a thing was once
29 written by AT&T, but I have never seen it. */
51 #ifdef MULTIBYTE_CHARS
59 /* Since parsers are distinct for each language, put the language string
62 const char * const language_string = "GNU Obj-C";
65 const char * const language_string = "GNU C";
68 /* Like YYERROR but do call yyerror. */
69 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
71 /* Cause the `yydebug' variable to be defined. */
77 %union {long itype; tree ttype; enum tree_code code;
78 char *filename; int lineno; int ends_in_label; }
80 /* All identifiers that are not reserved words
81 and are not declared typedefs in the current block */
84 /* All identifiers that are declared typedefs in the current block.
85 In some contexts, they are treated just like IDENTIFIER,
86 but they can also serve as typespecs in declarations. */
89 /* Reserved words that specify storage class.
90 yylval contains an IDENTIFIER_NODE which indicates which one. */
93 /* Reserved words that specify type.
94 yylval contains an IDENTIFIER_NODE which indicates which one. */
97 /* Reserved words that qualify type: "const", "volatile", or "restrict".
98 yylval contains an IDENTIFIER_NODE which indicates which one. */
101 /* Character or numeric constants.
102 yylval is the node for the constant. */
105 /* String constants in raw form.
106 yylval is a STRING_CST node. */
109 /* "...", used for functions with variable arglists. */
112 /* the reserved words */
113 /* SCO include files test "ASM", so use something else. */
114 %token SIZEOF ENUM STRUCT UNION IF ELSE WHILE DO FOR SWITCH CASE DEFAULT
115 %token BREAK CONTINUE RETURN GOTO ASM_KEYWORD TYPEOF ALIGNOF
116 %token ATTRIBUTE EXTENSION LABEL
117 %token REALPART IMAGPART VA_ARG
118 %token PTR_VALUE PTR_BASE PTR_EXTENT
120 /* Used in c-lex.c for parsing pragmas. */
123 /* Add precedence rules to solve dangling else s/r conflict */
127 /* Define the operator tokens and their precedences.
128 The value is an integer because, if used, it is the tree code
129 to use in the expression made from the operator. */
131 %right <code> ASSIGN '='
132 %right <code> '?' ':'
138 %left <code> EQCOMPARE
139 %left <code> ARITHCOMPARE
140 %left <code> LSHIFT RSHIFT
142 %left <code> '*' '/' '%'
143 %right <code> UNARY PLUSPLUS MINUSMINUS
145 %left <code> POINTSAT '.' '(' '['
147 /* The Objective-C keywords. These are included in C and in
148 Objective C, so that the token codes are the same in both. */
149 %token INTERFACE IMPLEMENTATION END SELECTOR DEFS ENCODE
150 %token CLASSNAME PUBLIC PRIVATE PROTECTED PROTOCOL OBJECTNAME CLASS ALIAS
152 /* Objective-C string constants in raw form.
153 yylval is an OBJC_STRING_CST node. */
159 %type <ttype> identifier IDENTIFIER TYPENAME CONSTANT expr nonnull_exprlist exprlist
160 %type <ttype> expr_no_commas cast_expr unary_expr primary string STRING
161 %type <ttype> typed_declspecs reserved_declspecs
162 %type <ttype> typed_typespecs reserved_typespecquals
163 %type <ttype> declmods typespec typespecqual_reserved
164 %type <ttype> typed_declspecs_no_prefix_attr reserved_declspecs_no_prefix_attr
165 %type <ttype> declmods_no_prefix_attr
166 %type <ttype> SCSPEC TYPESPEC TYPE_QUAL nonempty_type_quals maybe_type_qual
167 %type <ttype> initdecls notype_initdecls initdcl notype_initdcl
168 %type <ttype> init maybeasm
169 %type <ttype> asm_operands nonnull_asm_operands asm_operand asm_clobbers
170 %type <ttype> maybe_attribute attributes attribute attribute_list attrib
171 %type <ttype> any_word extension
173 %type <ttype> compstmt compstmt_nostart compstmt_primary_start
175 %type <ttype> declarator
176 %type <ttype> notype_declarator after_type_declarator
177 %type <ttype> parm_declarator
179 %type <ttype> structsp component_decl_list component_decl_list2
180 %type <ttype> component_decl components component_declarator
181 %type <ttype> enumlist enumerator
182 %type <ttype> struct_head union_head enum_head
183 %type <ttype> typename absdcl absdcl1 type_quals
184 %type <ttype> xexpr parms parm identifiers
186 %type <ttype> parmlist parmlist_1 parmlist_2
187 %type <ttype> parmlist_or_identifiers parmlist_or_identifiers_1
188 %type <ttype> identifiers_or_typenames
190 %type <itype> setspecs
192 %type <ends_in_label> lineno_stmt_or_label lineno_stmt_or_labels stmt_or_label
194 %type <filename> save_filename
195 %type <lineno> save_lineno
198 /* the Objective-C nonterminals */
200 %type <ttype> ivar_decl_list ivar_decls ivar_decl ivars ivar_declarator
201 %type <ttype> methoddecl unaryselector keywordselector selector
202 %type <ttype> keyworddecl receiver objcmessageexpr messageargs
203 %type <ttype> keywordexpr keywordarglist keywordarg
204 %type <ttype> myparms myparm optparmlist reservedwords objcselectorexpr
205 %type <ttype> selectorarg keywordnamelist keywordname objcencodeexpr
206 %type <ttype> objc_string non_empty_protocolrefs protocolrefs identifier_list objcprotocolexpr
208 %type <ttype> CLASSNAME OBJC_STRING OBJECTNAME
212 /* Number of statements (loosely speaking) and compound statements
214 static int stmt_count;
215 static int compstmt_count;
217 /* Input file and line number of the end of the body of last simple_if;
218 used by the stmt-rule immediately after simple_if returns. */
219 static char *if_stmt_file;
220 static int if_stmt_line;
222 /* List of types and structure classes of the current declaration. */
223 static tree current_declspecs = NULL_TREE;
224 static tree prefix_attributes = NULL_TREE;
226 /* Stack of saved values of current_declspecs and prefix_attributes. */
227 static tree declspec_stack;
229 /* 1 if we explained undeclared var errors. */
230 static int undeclared_variable_notice;
232 /* For __extension__, save/restore the warning flags which are
233 controlled by __extension__. */
234 #define SAVE_WARN_FLAGS() \
235 build_int_2 (pedantic | (warn_pointer_arith << 1), 0)
236 #define RESTORE_WARN_FLAGS(tval) \
238 int val = TREE_INT_CST_LOW (tval); \
239 pedantic = val & 1; \
240 warn_pointer_arith = (val >> 1) & 1; \
244 /* Objective-C specific information */
246 tree objc_interface_context;
247 tree objc_implementation_context;
248 tree objc_method_context;
249 tree objc_ivar_chain;
250 tree objc_ivar_context;
251 enum tree_code objc_inherit_code;
252 int objc_receiver_context;
253 int objc_public_flag;
257 /* Tell yyparse how to print a token's value, if yydebug is set. */
259 #define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
260 extern void yyprint PARAMS ((FILE *, int, YYSTYPE));
262 /* Add GC roots for variables local to this file. */
266 ggc_add_tree_root (&declspec_stack, 1);
267 ggc_add_tree_root (¤t_declspecs, 1);
268 ggc_add_tree_root (&prefix_attributes, 1);
276 pedwarn ("ANSI C forbids an empty source file");
281 /* In case there were missing closebraces,
282 get us back to the global binding level. */
283 while (! global_bindings_p ())
289 /* the reason for the strange actions in this rule
290 is so that notype_initdecls when reached via datadef
291 can find a valid list of type and sc specs in $0. */
294 {$<ttype>$ = NULL_TREE; } extdef
295 | extdefs {$<ttype>$ = NULL_TREE; } extdef
304 | ASM_KEYWORD '(' expr ')' ';'
306 if ((TREE_CODE ($3) == ADDR_EXPR
307 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
308 || TREE_CODE ($3) == STRING_CST)
311 error ("argument of `asm' is not a constant string"); }
313 { RESTORE_WARN_FLAGS ($1); }
317 setspecs notype_initdecls ';'
319 error ("ANSI C forbids data definition with no type or storage class");
320 else if (!flag_traditional)
321 warning ("data definition has no type or storage class");
323 current_declspecs = TREE_VALUE (declspec_stack);
324 prefix_attributes = TREE_PURPOSE (declspec_stack);
325 declspec_stack = TREE_CHAIN (declspec_stack); }
326 | declmods setspecs notype_initdecls ';'
327 { current_declspecs = TREE_VALUE (declspec_stack);
328 prefix_attributes = TREE_PURPOSE (declspec_stack);
329 declspec_stack = TREE_CHAIN (declspec_stack); }
330 | typed_declspecs setspecs initdecls ';'
331 { current_declspecs = TREE_VALUE (declspec_stack);
332 prefix_attributes = TREE_PURPOSE (declspec_stack);
333 declspec_stack = TREE_CHAIN (declspec_stack); }
335 { pedwarn ("empty declaration"); }
336 | typed_declspecs ';'
342 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
346 typed_declspecs setspecs declarator
347 { if (! start_function (current_declspecs, $3,
348 prefix_attributes, NULL_TREE))
350 reinit_parse_for_function (); }
352 { store_parm_decls (); }
354 { finish_function (0);
355 current_declspecs = TREE_VALUE (declspec_stack);
356 prefix_attributes = TREE_PURPOSE (declspec_stack);
357 declspec_stack = TREE_CHAIN (declspec_stack); }
358 | typed_declspecs setspecs declarator error
359 { current_declspecs = TREE_VALUE (declspec_stack);
360 prefix_attributes = TREE_PURPOSE (declspec_stack);
361 declspec_stack = TREE_CHAIN (declspec_stack); }
362 | declmods setspecs notype_declarator
363 { if (! start_function (current_declspecs, $3,
364 prefix_attributes, NULL_TREE))
366 reinit_parse_for_function (); }
368 { store_parm_decls (); }
370 { finish_function (0);
371 current_declspecs = TREE_VALUE (declspec_stack);
372 prefix_attributes = TREE_PURPOSE (declspec_stack);
373 declspec_stack = TREE_CHAIN (declspec_stack); }
374 | declmods setspecs notype_declarator error
375 { current_declspecs = TREE_VALUE (declspec_stack);
376 prefix_attributes = TREE_PURPOSE (declspec_stack);
377 declspec_stack = TREE_CHAIN (declspec_stack); }
378 | setspecs notype_declarator
379 { if (! start_function (NULL_TREE, $2,
380 prefix_attributes, NULL_TREE))
382 reinit_parse_for_function (); }
384 { store_parm_decls (); }
386 { finish_function (0);
387 current_declspecs = TREE_VALUE (declspec_stack);
388 prefix_attributes = TREE_PURPOSE (declspec_stack);
389 declspec_stack = TREE_CHAIN (declspec_stack); }
390 | setspecs notype_declarator error
391 { current_declspecs = TREE_VALUE (declspec_stack);
392 prefix_attributes = TREE_PURPOSE (declspec_stack);
393 declspec_stack = TREE_CHAIN (declspec_stack); }
408 { $$ = NEGATE_EXPR; }
410 { $$ = CONVERT_EXPR; }
412 { $$ = PREINCREMENT_EXPR; }
414 { $$ = PREDECREMENT_EXPR; }
416 { $$ = BIT_NOT_EXPR; }
418 { $$ = TRUTH_NOT_EXPR; }
421 expr: nonnull_exprlist
422 { $$ = build_compound_expr ($1); }
433 { $$ = build_tree_list (NULL_TREE, $1); }
434 | nonnull_exprlist ',' expr_no_commas
435 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
440 | '*' cast_expr %prec UNARY
441 { $$ = build_indirect_ref ($2, "unary *"); }
442 /* __extension__ turns off -pedantic for following primary. */
443 | extension cast_expr %prec UNARY
445 RESTORE_WARN_FLAGS ($1); }
446 | unop cast_expr %prec UNARY
447 { $$ = build_unary_op ($1, $2, 0);
448 overflow_warning ($$); }
449 /* Refer to the address of a label as a pointer. */
451 { tree label = lookup_label ($2);
453 pedwarn ("ANSI C forbids `&&'");
455 $$ = null_pointer_node;
458 TREE_USED (label) = 1;
459 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
460 TREE_CONSTANT ($$) = 1;
463 /* This seems to be impossible on some machines, so let's turn it off.
464 You can use __builtin_next_arg to find the anonymous stack args.
466 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
467 $$ = error_mark_node;
468 if (TREE_VALUE (tree_last (types)) == void_type_node)
469 error ("`&...' used in function with fixed number of arguments");
473 pedwarn ("ANSI C forbids `&...'");
474 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
475 $$ = build_unary_op (ADDR_EXPR, $$, 0);
478 | sizeof unary_expr %prec UNARY
480 if (TREE_CODE ($2) == COMPONENT_REF
481 && DECL_C_BIT_FIELD (TREE_OPERAND ($2, 1)))
482 error ("`sizeof' applied to a bit-field");
483 $$ = c_sizeof (TREE_TYPE ($2)); }
484 | sizeof '(' typename ')' %prec HYPERUNARY
486 $$ = c_sizeof (groktypename ($3)); }
487 | alignof unary_expr %prec UNARY
489 $$ = c_alignof_expr ($2); }
490 | alignof '(' typename ')' %prec HYPERUNARY
492 $$ = c_alignof (groktypename ($3)); }
493 | REALPART cast_expr %prec UNARY
494 { $$ = build_unary_op (REALPART_EXPR, $2, 0); }
495 | IMAGPART cast_expr %prec UNARY
496 { $$ = build_unary_op (IMAGPART_EXPR, $2, 0); }
497 | VA_ARG '(' expr_no_commas ',' typename ')'
498 { $$ = build_va_arg ($3, groktypename ($5)); }
502 SIZEOF { skip_evaluation++; }
506 ALIGNOF { skip_evaluation++; }
511 | '(' typename ')' cast_expr %prec UNARY
512 { tree type = groktypename ($2);
513 $$ = build_c_cast (type, $4); }
514 | '(' typename ')' '{'
515 { start_init (NULL_TREE, NULL, 0);
516 $2 = groktypename ($2);
517 really_start_incremental_init ($2); }
518 initlist_maybe_comma '}' %prec UNARY
520 tree result = pop_init_level (0);
524 if (pedantic && ! flag_isoc99)
525 pedwarn ("ANSI C forbids constructor expressions");
526 if (TYPE_NAME (type) != 0)
528 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
529 name = IDENTIFIER_POINTER (TYPE_NAME (type));
531 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
536 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
538 int failure = complete_array_type (type, $$, 1);
547 | expr_no_commas '+' expr_no_commas
548 { $$ = parser_build_binary_op ($2, $1, $3); }
549 | expr_no_commas '-' expr_no_commas
550 { $$ = parser_build_binary_op ($2, $1, $3); }
551 | expr_no_commas '*' expr_no_commas
552 { $$ = parser_build_binary_op ($2, $1, $3); }
553 | expr_no_commas '/' expr_no_commas
554 { $$ = parser_build_binary_op ($2, $1, $3); }
555 | expr_no_commas '%' expr_no_commas
556 { $$ = parser_build_binary_op ($2, $1, $3); }
557 | expr_no_commas LSHIFT expr_no_commas
558 { $$ = parser_build_binary_op ($2, $1, $3); }
559 | expr_no_commas RSHIFT expr_no_commas
560 { $$ = parser_build_binary_op ($2, $1, $3); }
561 | expr_no_commas ARITHCOMPARE expr_no_commas
562 { $$ = parser_build_binary_op ($2, $1, $3); }
563 | expr_no_commas EQCOMPARE expr_no_commas
564 { $$ = parser_build_binary_op ($2, $1, $3); }
565 | expr_no_commas '&' expr_no_commas
566 { $$ = parser_build_binary_op ($2, $1, $3); }
567 | expr_no_commas '|' expr_no_commas
568 { $$ = parser_build_binary_op ($2, $1, $3); }
569 | expr_no_commas '^' expr_no_commas
570 { $$ = parser_build_binary_op ($2, $1, $3); }
571 | expr_no_commas ANDAND
572 { $1 = truthvalue_conversion (default_conversion ($1));
573 skip_evaluation += $1 == boolean_false_node; }
575 { skip_evaluation -= $1 == boolean_false_node;
576 $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $4); }
577 | expr_no_commas OROR
578 { $1 = truthvalue_conversion (default_conversion ($1));
579 skip_evaluation += $1 == boolean_true_node; }
581 { skip_evaluation -= $1 == boolean_true_node;
582 $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $4); }
584 { $1 = truthvalue_conversion (default_conversion ($1));
585 skip_evaluation += $1 == boolean_false_node; }
587 { skip_evaluation += (($1 == boolean_true_node)
588 - ($1 == boolean_false_node)); }
590 { skip_evaluation -= $1 == boolean_true_node;
591 $$ = build_conditional_expr ($1, $4, $7); }
594 pedwarn ("ANSI C forbids omitting the middle term of a ?: expression");
595 /* Make sure first operand is calculated only once. */
596 $<ttype>2 = save_expr ($1);
597 $1 = truthvalue_conversion (default_conversion ($<ttype>2));
598 skip_evaluation += $1 == boolean_true_node; }
600 { skip_evaluation -= $1 == boolean_true_node;
601 $$ = build_conditional_expr ($1, $<ttype>2, $5); }
602 | expr_no_commas '=' expr_no_commas
604 $$ = build_modify_expr ($1, NOP_EXPR, $3);
605 class = TREE_CODE_CLASS (TREE_CODE ($$));
606 if (class == 'e' || class == '1'
607 || class == '2' || class == '<')
608 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR);
610 | expr_no_commas ASSIGN expr_no_commas
612 $$ = build_modify_expr ($1, $2, $3);
613 /* This inhibits warnings in truthvalue_conversion. */
614 class = TREE_CODE_CLASS (TREE_CODE ($$));
615 if (class == 'e' || class == '1'
616 || class == '2' || class == '<')
617 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK);
625 if (!$$ || $$ == error_mark_node)
627 if (yychar == YYEMPTY)
634 if (objc_receiver_context
635 && ! (objc_receiver_context
636 && strcmp (IDENTIFIER_POINTER ($1), "super")))
637 /* we have a message to super */
638 $$ = get_super_receiver ();
639 else if (objc_method_context
640 && (decl = is_ivar (objc_ivar_chain, $1)))
642 if (is_private (decl))
643 $$ = error_mark_node;
645 $$ = build_ivar_reference ($1);
650 /* Ordinary implicit function declaration. */
651 $$ = implicitly_declare ($1);
652 assemble_external ($$);
656 else if (current_function_decl == 0)
658 error ("`%s' undeclared here (not in a function)",
659 IDENTIFIER_POINTER ($1));
660 $$ = error_mark_node;
667 if (objc_receiver_context
668 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
669 /* we have a message to super */
670 $$ = get_super_receiver ();
671 else if (objc_method_context
672 && (decl = is_ivar (objc_ivar_chain, $1)))
674 if (is_private (decl))
675 $$ = error_mark_node;
677 $$ = build_ivar_reference ($1);
682 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
683 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
685 error ("`%s' undeclared (first use in this function)",
686 IDENTIFIER_POINTER ($1));
688 if (! undeclared_variable_notice)
690 error ("(Each undeclared identifier is reported only once");
691 error ("for each function it appears in.)");
692 undeclared_variable_notice = 1;
695 $$ = error_mark_node;
696 /* Prevent repeated error messages. */
697 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
698 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
702 else if (TREE_TYPE ($$) == error_mark_node)
703 $$ = error_mark_node;
704 else if (C_DECL_ANTICIPATED ($$))
706 /* The first time we see a build-in function used,
707 if it has not been declared. */
708 C_DECL_ANTICIPATED ($$) = 0;
709 if (yychar == YYEMPTY)
713 /* Omit the implicit declaration we
714 would ordinarily do, so we don't lose
715 the actual built in type.
716 But print a diagnostic for the mismatch. */
718 if (objc_method_context
719 && is_ivar (objc_ivar_chain, $1))
720 error ("Instance variable `%s' implicitly declared as function",
721 IDENTIFIER_POINTER (DECL_NAME ($$)));
724 if (TREE_CODE ($$) != FUNCTION_DECL)
725 error ("`%s' implicitly declared as function",
726 IDENTIFIER_POINTER (DECL_NAME ($$)));
727 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
728 != TYPE_MODE (integer_type_node))
729 && (TREE_TYPE (TREE_TYPE ($$))
731 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
732 IDENTIFIER_POINTER (DECL_NAME ($$)));
733 /* If it really returns void, change that to int. */
734 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
736 = build_function_type (integer_type_node,
737 TYPE_ARG_TYPES (TREE_TYPE ($$)));
740 pedwarn ("built-in function `%s' used without declaration",
741 IDENTIFIER_POINTER (DECL_NAME ($$)));
743 /* Do what we would ordinarily do when a fn is used. */
744 assemble_external ($$);
749 assemble_external ($$);
752 /* we have a definition - still check if iVariable */
754 if (!objc_receiver_context
755 || (objc_receiver_context
756 && strcmp (IDENTIFIER_POINTER ($1), "super")))
760 if (objc_method_context
761 && (decl = is_ivar (objc_ivar_chain, $1)))
763 if (IDENTIFIER_LOCAL_VALUE ($1))
764 warning ("local declaration of `%s' hides instance variable",
765 IDENTIFIER_POINTER ($1));
768 if (is_private (decl))
769 $$ = error_mark_node;
771 $$ = build_ivar_reference ($1);
775 else /* we have a message to super */
776 $$ = get_super_receiver ();
780 if (TREE_CODE ($$) == CONST_DECL)
782 $$ = DECL_INITIAL ($$);
783 /* This is to prevent an enum whose value is 0
784 from being considered a null pointer constant. */
785 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
786 TREE_CONSTANT ($$) = 1;
791 { $$ = combine_strings ($1); }
793 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
794 if (class == 'e' || class == '1'
795 || class == '2' || class == '<')
796 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
799 { $$ = error_mark_node; }
800 | compstmt_primary_start compstmt_nostart ')'
803 pedwarn ("ANSI C forbids braced-groups within expressions");
804 pop_iterator_stack ();
806 rtl_exp = expand_end_stmt_expr ($1);
807 /* The statements have side effects, so the group does. */
808 TREE_SIDE_EFFECTS (rtl_exp) = 1;
810 if (TREE_CODE ($2) == BLOCK)
812 /* Make a BIND_EXPR for the BLOCK already made. */
813 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
814 NULL_TREE, rtl_exp, $2);
815 /* Remove the block from the tree at this point.
816 It gets put back at the proper place
817 when the BIND_EXPR is expanded. */
823 | compstmt_primary_start error ')'
825 /* Make sure we call expand_end_stmt_expr. Otherwise
826 we are likely to lose sequences and crash later. */
827 pop_iterator_stack ();
829 expand_end_stmt_expr ($1);
830 $$ = error_mark_node;
832 | primary '(' exprlist ')' %prec '.'
833 { $$ = build_function_call ($1, $3); }
834 | primary '[' expr ']' %prec '.'
835 { $$ = build_array_ref ($1, $3); }
836 | primary '.' identifier
839 if (doing_objc_thang)
841 if (is_public ($1, $3))
842 $$ = build_component_ref ($1, $3);
844 $$ = error_mark_node;
848 $$ = build_component_ref ($1, $3);
850 | primary POINTSAT identifier
852 tree expr = build_indirect_ref ($1, "->");
855 if (doing_objc_thang)
857 if (is_public (expr, $3))
858 $$ = build_component_ref (expr, $3);
860 $$ = error_mark_node;
864 $$ = build_component_ref (expr, $3);
867 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
869 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
872 { $$ = build_message_expr ($1); }
874 { $$ = build_selector_expr ($1); }
876 { $$ = build_protocol_expr ($1); }
878 { $$ = build_encode_expr ($1); }
880 { $$ = build_objc_string_object ($1); }
884 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
888 { $$ = chainon ($1, $2);
890 if (warn_traditional && !in_system_header)
891 warning ("Use of ANSI string concatenation");
897 /* Produces an OBJC_STRING_CST with perhaps more OBJC_STRING_CSTs chained
901 | objc_string OBJC_STRING
902 { $$ = chainon ($1, $2); }
906 old_style_parm_decls:
910 /* ... is used here to indicate a varargs function. */
913 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
916 /* The following are analogous to lineno_decl, decls and decl
917 except that they do not allow nested functions.
918 They are used for old-style parm decls. */
920 save_filename save_lineno datadecl
927 | datadecls lineno_datadecl
928 | lineno_datadecl errstmt
931 /* We don't allow prefix attributes here because they cause reduce/reduce
932 conflicts: we can't know whether we're parsing a function decl with
933 attribute suffix, or function defn with attribute prefix on first old
936 typed_declspecs_no_prefix_attr setspecs initdecls ';'
937 { current_declspecs = TREE_VALUE (declspec_stack);
938 prefix_attributes = TREE_PURPOSE (declspec_stack);
939 declspec_stack = TREE_CHAIN (declspec_stack); }
940 | declmods_no_prefix_attr setspecs notype_initdecls ';'
941 { current_declspecs = TREE_VALUE (declspec_stack);
942 prefix_attributes = TREE_PURPOSE (declspec_stack);
943 declspec_stack = TREE_CHAIN (declspec_stack); }
944 | typed_declspecs_no_prefix_attr ';'
945 { shadow_tag_warned ($1, 1);
946 pedwarn ("empty declaration"); }
947 | declmods_no_prefix_attr ';'
948 { pedwarn ("empty declaration"); }
951 /* This combination which saves a lineno before a decl
952 is the normal thing to use, rather than decl itself.
953 This is to avoid shift/reduce conflicts in contexts
954 where statement labels are allowed. */
956 save_filename save_lineno decl
964 | lineno_decl errstmt
967 /* records the type and storage class specs to use for processing
968 the declarators that follow.
969 Maintains a stack of outer-level values of current_declspecs,
970 for the sake of parm declarations nested in function declarators. */
971 setspecs: /* empty */
972 { pending_xref_error ();
973 declspec_stack = tree_cons (prefix_attributes,
976 split_specs_attrs ($<ttype>0,
977 ¤t_declspecs, &prefix_attributes); }
980 /* ??? Yuck. See after_type_declarator. */
981 setattrs: /* empty */
982 { prefix_attributes = chainon (prefix_attributes, $<ttype>0); }
986 typed_declspecs setspecs initdecls ';'
987 { current_declspecs = TREE_VALUE (declspec_stack);
988 prefix_attributes = TREE_PURPOSE (declspec_stack);
989 declspec_stack = TREE_CHAIN (declspec_stack); }
990 | declmods setspecs notype_initdecls ';'
991 { current_declspecs = TREE_VALUE (declspec_stack);
992 prefix_attributes = TREE_PURPOSE (declspec_stack);
993 declspec_stack = TREE_CHAIN (declspec_stack); }
994 | typed_declspecs setspecs nested_function
995 { current_declspecs = TREE_VALUE (declspec_stack);
996 prefix_attributes = TREE_PURPOSE (declspec_stack);
997 declspec_stack = TREE_CHAIN (declspec_stack); }
998 | declmods setspecs notype_nested_function
999 { current_declspecs = TREE_VALUE (declspec_stack);
1000 prefix_attributes = TREE_PURPOSE (declspec_stack);
1001 declspec_stack = TREE_CHAIN (declspec_stack); }
1002 | typed_declspecs ';'
1003 { shadow_tag ($1); }
1005 { pedwarn ("empty declaration"); }
1007 { RESTORE_WARN_FLAGS ($1); }
1010 /* Declspecs which contain at least one type specifier or typedef name.
1011 (Just `const' or `volatile' is not enough.)
1012 A typedef'd name following these is taken as a name to be declared.
1013 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1016 typespec reserved_declspecs
1017 { $$ = tree_cons (NULL_TREE, $1, $2); }
1018 | declmods typespec reserved_declspecs
1019 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1022 reserved_declspecs: /* empty */
1024 | reserved_declspecs typespecqual_reserved
1025 { $$ = tree_cons (NULL_TREE, $2, $1); }
1026 | reserved_declspecs SCSPEC
1027 { if (extra_warnings)
1028 warning ("`%s' is not at beginning of declaration",
1029 IDENTIFIER_POINTER ($2));
1030 $$ = tree_cons (NULL_TREE, $2, $1); }
1031 | reserved_declspecs attributes
1032 { $$ = tree_cons ($2, NULL_TREE, $1); }
1035 typed_declspecs_no_prefix_attr:
1036 typespec reserved_declspecs_no_prefix_attr
1037 { $$ = tree_cons (NULL_TREE, $1, $2); }
1038 | declmods_no_prefix_attr typespec reserved_declspecs_no_prefix_attr
1039 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1042 reserved_declspecs_no_prefix_attr:
1045 | reserved_declspecs_no_prefix_attr typespecqual_reserved
1046 { $$ = tree_cons (NULL_TREE, $2, $1); }
1047 | reserved_declspecs_no_prefix_attr SCSPEC
1048 { if (extra_warnings)
1049 warning ("`%s' is not at beginning of declaration",
1050 IDENTIFIER_POINTER ($2));
1051 $$ = tree_cons (NULL_TREE, $2, $1); }
1054 /* List of just storage classes, type modifiers, and prefix attributes.
1055 A declaration can start with just this, but then it cannot be used
1056 to redeclare a typedef-name.
1057 Declspecs have a non-NULL TREE_VALUE, attributes do not. */
1060 declmods_no_prefix_attr
1063 { $$ = tree_cons ($1, NULL_TREE, NULL_TREE); }
1064 | declmods declmods_no_prefix_attr
1065 { $$ = chainon ($2, $1); }
1066 | declmods attributes
1067 { $$ = tree_cons ($2, NULL_TREE, $1); }
1070 declmods_no_prefix_attr:
1072 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
1073 TREE_STATIC ($$) = 1; }
1075 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1076 | declmods_no_prefix_attr TYPE_QUAL
1077 { $$ = tree_cons (NULL_TREE, $2, $1);
1078 TREE_STATIC ($$) = 1; }
1079 | declmods_no_prefix_attr SCSPEC
1080 { if (extra_warnings && TREE_STATIC ($1))
1081 warning ("`%s' is not at beginning of declaration",
1082 IDENTIFIER_POINTER ($2));
1083 $$ = tree_cons (NULL_TREE, $2, $1);
1084 TREE_STATIC ($$) = TREE_STATIC ($1); }
1088 /* Used instead of declspecs where storage classes are not allowed
1089 (that is, for typenames and structure components).
1090 Don't accept a typedef-name if anything but a modifier precedes it. */
1093 typespec reserved_typespecquals
1094 { $$ = tree_cons (NULL_TREE, $1, $2); }
1095 | nonempty_type_quals typespec reserved_typespecquals
1096 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
1099 reserved_typespecquals: /* empty */
1101 | reserved_typespecquals typespecqual_reserved
1102 { $$ = tree_cons (NULL_TREE, $2, $1); }
1105 /* A typespec (but not a type qualifier).
1106 Once we have seen one of these in a declaration,
1107 if a typedef name appears then it is being redeclared. */
1112 { /* For a typedef name, record the meaning, not the name.
1113 In case of `foo foo, bar;'. */
1114 $$ = lookup_name ($1); }
1116 | CLASSNAME protocolrefs
1117 { $$ = get_static_reference ($1, $2); }
1118 | OBJECTNAME protocolrefs
1119 { $$ = get_object_reference ($2); }
1121 /* Make "<SomeProtocol>" equivalent to "id <SomeProtocol>"
1122 - nisse@lysator.liu.se */
1123 | non_empty_protocolrefs
1124 { $$ = get_object_reference ($1); }
1126 | TYPEOF '(' expr ')'
1127 { $$ = TREE_TYPE ($3); }
1128 | TYPEOF '(' typename ')'
1129 { $$ = groktypename ($3); }
1132 /* A typespec that is a reserved word, or a type qualifier. */
1134 typespecqual_reserved: TYPESPEC
1141 | initdecls ',' initdcl
1146 | notype_initdecls ',' initdcl
1152 | ASM_KEYWORD '(' string ')'
1153 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1159 declarator maybeasm maybe_attribute '='
1160 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1161 $3, prefix_attributes);
1162 start_init ($<ttype>$, $2, global_bindings_p ()); }
1164 /* Note how the declaration of the variable is in effect while its init is parsed! */
1166 finish_decl ($<ttype>5, $6, $2); }
1167 | declarator maybeasm maybe_attribute
1168 { tree d = start_decl ($1, current_declspecs, 0,
1169 $3, prefix_attributes);
1170 finish_decl (d, NULL_TREE, $2);
1175 notype_declarator maybeasm maybe_attribute '='
1176 { $<ttype>$ = start_decl ($1, current_declspecs, 1,
1177 $3, prefix_attributes);
1178 start_init ($<ttype>$, $2, global_bindings_p ()); }
1180 /* Note how the declaration of the variable is in effect while its init is parsed! */
1182 decl_attributes ($<ttype>5, $3, prefix_attributes);
1183 finish_decl ($<ttype>5, $6, $2); }
1184 | notype_declarator maybeasm maybe_attribute
1185 { tree d = start_decl ($1, current_declspecs, 0,
1186 $3, prefix_attributes);
1187 finish_decl (d, NULL_TREE, $2); }
1189 /* the * rules are dummies to accept the Apollo extended syntax
1190 so that the header files compile. */
1201 | attributes attribute
1202 { $$ = chainon ($1, $2); }
1206 ATTRIBUTE '(' '(' attribute_list ')' ')'
1213 | attribute_list ',' attrib
1214 { $$ = chainon ($1, $3); }
1221 { $$ = build_tree_list ($1, NULL_TREE); }
1222 | any_word '(' IDENTIFIER ')'
1223 { $$ = build_tree_list ($1, build_tree_list (NULL_TREE, $3)); }
1224 | any_word '(' IDENTIFIER ',' nonnull_exprlist ')'
1225 { $$ = build_tree_list ($1, tree_cons (NULL_TREE, $3, $5)); }
1226 | any_word '(' exprlist ')'
1227 { $$ = build_tree_list ($1, $3); }
1230 /* This still leaves out most reserved keywords,
1231 shouldn't we include them? */
1240 /* Initializers. `init' is the entry point. */
1245 { really_start_incremental_init (NULL_TREE); }
1246 initlist_maybe_comma '}'
1247 { $$ = pop_init_level (0); }
1249 { $$ = error_mark_node; }
1252 /* `initlist_maybe_comma' is the guts of an initializer in braces. */
1253 initlist_maybe_comma:
1256 pedwarn ("ANSI C forbids empty initializer braces"); }
1257 | initlist1 maybecomma
1262 | initlist1 ',' initelt
1265 /* `initelt' is a single element of an initializer.
1266 It may use braces. */
1268 designator_list '=' initval
1269 | designator initval
1271 { set_init_label ($1); }
1278 { push_init_level (0); }
1279 initlist_maybe_comma '}'
1280 { process_init_element (pop_init_level (0)); }
1282 { process_init_element ($1); }
1288 | designator_list designator
1293 { set_init_label ($2); }
1294 /* These are for labeled elements. The syntax for an array element
1295 initializer conflicts with the syntax for an Objective-C message,
1296 so don't include these productions in the Objective-C grammar. */
1298 | '[' expr_no_commas ELLIPSIS expr_no_commas ']'
1299 { set_init_index ($2, $4); }
1300 | '[' expr_no_commas ']'
1301 { set_init_index ($2, NULL_TREE); }
1308 pedwarn ("ANSI C forbids nested functions");
1310 push_function_context ();
1311 if (! start_function (current_declspecs, $1,
1312 prefix_attributes, NULL_TREE))
1314 pop_function_context ();
1317 reinit_parse_for_function (); }
1318 old_style_parm_decls
1319 { store_parm_decls (); }
1320 /* This used to use compstmt_or_error.
1321 That caused a bug with input `f(g) int g {}',
1322 where the use of YYERROR1 above caused an error
1323 which then was handled by compstmt_or_error.
1324 There followed a repeated execution of that same rule,
1325 which called YYERROR1 again, and so on. */
1327 { finish_function (1);
1328 pop_function_context (); }
1331 notype_nested_function:
1334 pedwarn ("ANSI C forbids nested functions");
1336 push_function_context ();
1337 if (! start_function (current_declspecs, $1,
1338 prefix_attributes, NULL_TREE))
1340 pop_function_context ();
1343 reinit_parse_for_function (); }
1344 old_style_parm_decls
1345 { store_parm_decls (); }
1346 /* This used to use compstmt_or_error.
1347 That caused a bug with input `f(g) int g {}',
1348 where the use of YYERROR1 above caused an error
1349 which then was handled by compstmt_or_error.
1350 There followed a repeated execution of that same rule,
1351 which called YYERROR1 again, and so on. */
1353 { finish_function (1);
1354 pop_function_context (); }
1357 /* Any kind of declarator (thus, all declarators allowed
1358 after an explicit typespec). */
1361 after_type_declarator
1365 /* A declarator that is allowed only after an explicit typespec. */
1367 after_type_declarator:
1368 '(' after_type_declarator ')'
1370 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1371 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1372 /* | after_type_declarator '(' error ')' %prec '.'
1373 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1374 poplevel (0, 0, 0); } */
1375 | after_type_declarator '[' expr ']' %prec '.'
1376 { $$ = build_nt (ARRAY_REF, $1, $3); }
1377 | after_type_declarator '[' ']' %prec '.'
1378 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1379 | '*' type_quals after_type_declarator %prec UNARY
1380 { $$ = make_pointer_declarator ($2, $3); }
1381 /* ??? Yuck. setattrs is a quick hack. We can't use
1382 prefix_attributes because $1 only applies to this
1383 declarator. We assume setspecs has already been done.
1384 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1385 attributes could be recognized here or in `attributes'). */
1386 | attributes setattrs after_type_declarator
1394 /* Kinds of declarator that can appear in a parameter list
1395 in addition to notype_declarator. This is like after_type_declarator
1396 but does not allow a typedef name in parentheses as an identifier
1397 (because it would conflict with a function with that typedef as arg). */
1400 parm_declarator '(' parmlist_or_identifiers %prec '.'
1401 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1402 /* | parm_declarator '(' error ')' %prec '.'
1403 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1404 poplevel (0, 0, 0); } */
1406 | parm_declarator '[' '*' ']' %prec '.'
1407 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1409 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1412 | parm_declarator '[' expr ']' %prec '.'
1413 { $$ = build_nt (ARRAY_REF, $1, $3); }
1414 | parm_declarator '[' ']' %prec '.'
1415 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1416 | '*' type_quals parm_declarator %prec UNARY
1417 { $$ = make_pointer_declarator ($2, $3); }
1418 /* ??? Yuck. setattrs is a quick hack. We can't use
1419 prefix_attributes because $1 only applies to this
1420 declarator. We assume setspecs has already been done.
1421 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1422 attributes could be recognized here or in `attributes'). */
1423 | attributes setattrs parm_declarator
1428 /* A declarator allowed whether or not there has been
1429 an explicit typespec. These cannot redeclare a typedef-name. */
1432 notype_declarator '(' parmlist_or_identifiers %prec '.'
1433 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1434 /* | notype_declarator '(' error ')' %prec '.'
1435 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1436 poplevel (0, 0, 0); } */
1437 | '(' notype_declarator ')'
1439 | '*' type_quals notype_declarator %prec UNARY
1440 { $$ = make_pointer_declarator ($2, $3); }
1442 | notype_declarator '[' '*' ']' %prec '.'
1443 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE);
1445 error ("`[*]' in parameter declaration only allowed in ISO C 99");
1448 | notype_declarator '[' expr ']' %prec '.'
1449 { $$ = build_nt (ARRAY_REF, $1, $3); }
1450 | notype_declarator '[' ']' %prec '.'
1451 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1452 /* ??? Yuck. setattrs is a quick hack. We can't use
1453 prefix_attributes because $1 only applies to this
1454 declarator. We assume setspecs has already been done.
1455 setattrs also avoids 5 reduce/reduce conflicts (otherwise multiple
1456 attributes could be recognized here or in `attributes'). */
1457 | attributes setattrs notype_declarator
1484 struct_head identifier '{'
1485 { $$ = start_struct (RECORD_TYPE, $2);
1486 /* Start scope of tag before parsing components. */
1488 component_decl_list '}' maybe_attribute
1489 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1490 | struct_head '{' component_decl_list '}' maybe_attribute
1491 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1492 $3, chainon ($1, $5));
1494 | struct_head identifier
1495 { $$ = xref_tag (RECORD_TYPE, $2); }
1496 | union_head identifier '{'
1497 { $$ = start_struct (UNION_TYPE, $2); }
1498 component_decl_list '}' maybe_attribute
1499 { $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
1500 | union_head '{' component_decl_list '}' maybe_attribute
1501 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1502 $3, chainon ($1, $5));
1504 | union_head identifier
1505 { $$ = xref_tag (UNION_TYPE, $2); }
1506 | enum_head identifier '{'
1507 { $$ = start_enum ($2); }
1508 enumlist maybecomma_warn '}' maybe_attribute
1509 { $$ = finish_enum ($<ttype>4, nreverse ($5),
1510 chainon ($1, $8)); }
1512 { $$ = start_enum (NULL_TREE); }
1513 enumlist maybecomma_warn '}' maybe_attribute
1514 { $$ = finish_enum ($<ttype>3, nreverse ($4),
1515 chainon ($1, $7)); }
1516 | enum_head identifier
1517 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1528 { if (pedantic && ! flag_isoc99)
1529 pedwarn ("comma at end of enumerator list"); }
1532 component_decl_list:
1533 component_decl_list2
1535 | component_decl_list2 component_decl
1536 { $$ = chainon ($1, $2);
1537 pedwarn ("no semicolon at end of struct or union"); }
1540 component_decl_list2: /* empty */
1542 | component_decl_list2 component_decl ';'
1543 { $$ = chainon ($1, $2); }
1544 | component_decl_list2 ';'
1546 pedwarn ("extra semicolon in struct or union specified"); }
1548 /* foo(sizeof(struct{ @defs(ClassName)})); */
1549 | DEFS '(' CLASSNAME ')'
1551 tree interface = lookup_interface ($3);
1554 $$ = get_class_ivars (interface);
1557 error ("Cannot find interface declaration for `%s'",
1558 IDENTIFIER_POINTER ($3));
1565 /* There is a shift-reduce conflict here, because `components' may
1566 start with a `typename'. It happens that shifting (the default resolution)
1567 does the right thing, because it treats the `typename' as part of
1568 a `typed_typespecs'.
1570 It is possible that this same technique would allow the distinction
1571 between `notype_initdecls' and `initdecls' to be eliminated.
1572 But I am being cautious and not trying it. */
1575 typed_typespecs setspecs components
1577 current_declspecs = TREE_VALUE (declspec_stack);
1578 prefix_attributes = TREE_PURPOSE (declspec_stack);
1579 declspec_stack = TREE_CHAIN (declspec_stack); }
1580 | typed_typespecs setspecs save_filename save_lineno maybe_attribute
1582 /* Support for unnamed structs or unions as members of
1583 structs or unions (which is [a] useful and [b] supports
1586 pedwarn ("ANSI C doesn't support unnamed structs/unions");
1588 $$ = grokfield($3, $4, NULL, current_declspecs, NULL_TREE);
1589 current_declspecs = TREE_VALUE (declspec_stack);
1590 prefix_attributes = TREE_PURPOSE (declspec_stack);
1591 declspec_stack = TREE_CHAIN (declspec_stack);
1593 | nonempty_type_quals setspecs components
1595 current_declspecs = TREE_VALUE (declspec_stack);
1596 prefix_attributes = TREE_PURPOSE (declspec_stack);
1597 declspec_stack = TREE_CHAIN (declspec_stack); }
1598 | nonempty_type_quals
1600 pedwarn ("ANSI C forbids member declarations with no members");
1605 | extension component_decl
1607 RESTORE_WARN_FLAGS ($1); }
1611 component_declarator
1612 | components ',' component_declarator
1613 { $$ = chainon ($1, $3); }
1616 component_declarator:
1617 save_filename save_lineno declarator maybe_attribute
1618 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1619 decl_attributes ($$, $4, prefix_attributes); }
1620 | save_filename save_lineno
1621 declarator ':' expr_no_commas maybe_attribute
1622 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1623 decl_attributes ($$, $6, prefix_attributes); }
1624 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1625 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1626 decl_attributes ($$, $5, prefix_attributes); }
1629 /* We chain the enumerators in reverse order.
1630 They are put in forward order where enumlist is used.
1631 (The order used to be significant, but no longer is so.
1632 However, we still maintain the order, just to be clean.) */
1636 | enumlist ',' enumerator
1637 { if ($1 == error_mark_node)
1640 $$ = chainon ($3, $1); }
1642 { $$ = error_mark_node; }
1648 { $$ = build_enumerator ($1, NULL_TREE); }
1649 | identifier '=' expr_no_commas
1650 { $$ = build_enumerator ($1, $3); }
1654 typed_typespecs absdcl
1655 { $$ = build_tree_list ($1, $2); }
1656 | nonempty_type_quals absdcl
1657 { $$ = build_tree_list ($1, $2); }
1660 absdcl: /* an absolute declarator */
1666 nonempty_type_quals:
1668 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1669 | nonempty_type_quals TYPE_QUAL
1670 { $$ = tree_cons (NULL_TREE, $2, $1); }
1676 | type_quals TYPE_QUAL
1677 { $$ = tree_cons (NULL_TREE, $2, $1); }
1680 absdcl1: /* a nonempty absolute declarator */
1683 /* `(typedef)1' is `int'. */
1684 | '*' type_quals absdcl1 %prec UNARY
1685 { $$ = make_pointer_declarator ($2, $3); }
1686 | '*' type_quals %prec UNARY
1687 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1688 | absdcl1 '(' parmlist %prec '.'
1689 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1690 | absdcl1 '[' expr ']' %prec '.'
1691 { $$ = build_nt (ARRAY_REF, $1, $3); }
1692 | absdcl1 '[' ']' %prec '.'
1693 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1694 | '(' parmlist %prec '.'
1695 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1696 | '[' expr ']' %prec '.'
1697 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1699 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1700 /* ??? It appears we have to support attributes here, however
1701 using prefix_attributes is wrong. */
1702 | attributes setattrs absdcl1
1706 /* at least one statement, the first of which parses without error. */
1707 /* stmts is used only after decls, so an invalid first statement
1708 is actually regarded as an invalid decl and part of the decls. */
1711 lineno_stmt_or_labels
1714 pedwarn ("ANSI C forbids label at end of compound statement");
1718 lineno_stmt_or_labels:
1719 lineno_stmt_or_label
1720 | lineno_stmt_or_labels lineno_stmt_or_label
1722 | lineno_stmt_or_labels errstmt
1734 pushlevel: /* empty */
1735 { emit_line_note (input_filename, lineno);
1738 expand_start_bindings (0);
1740 if (objc_method_context)
1746 /* Read zero or more forward-declarations for labels
1747 that nested functions can jump to. */
1752 pedwarn ("ANSI C forbids label declarations"); }
1757 | label_decls label_decl
1761 LABEL identifiers_or_typenames ';'
1763 for (link = $2; link; link = TREE_CHAIN (link))
1765 tree label = shadow_label (TREE_VALUE (link));
1766 C_DECLARED_LABEL_FLAG (label) = 1;
1767 declare_nonlocal_label (label);
1772 /* This is the body of a function definition.
1773 It causes syntax errors to ignore to the next openbrace. */
1780 compstmt_start: '{' { compstmt_count++; }
1782 compstmt_nostart: '}'
1783 { $$ = convert (void_type_node, integer_zero_node); }
1784 | pushlevel maybe_label_decls decls xstmts '}'
1785 { emit_line_note (input_filename, lineno);
1786 expand_end_bindings (getdecls (), 1, 0);
1787 $$ = poplevel (1, 1, 0); }
1788 | pushlevel maybe_label_decls error '}'
1789 { emit_line_note (input_filename, lineno);
1790 expand_end_bindings (getdecls (), kept_level_p (), 0);
1791 $$ = poplevel (kept_level_p (), 0, 0); }
1792 | pushlevel maybe_label_decls stmts '}'
1793 { emit_line_note (input_filename, lineno);
1794 expand_end_bindings (getdecls (), kept_level_p (), 0);
1795 $$ = poplevel (kept_level_p (), 0, 0); }
1798 compstmt_primary_start:
1800 { if (current_function_decl == 0)
1802 error ("braced-group within expression allowed only inside a function");
1805 /* We must force a BLOCK for this level
1806 so that, if it is not expanded later,
1807 there is a way to turn off the entire subtree of blocks
1808 that are contained in it. */
1810 push_iterator_stack ();
1811 push_label_level ();
1812 $$ = expand_start_stmt_expr ();
1816 compstmt: compstmt_start compstmt_nostart
1820 /* Value is number of statements counted as of the closeparen. */
1822 if_prefix lineno_labeled_stmt
1823 /* Make sure c_expand_end_cond is run once
1824 for each call to c_expand_start_cond.
1825 Otherwise a crash is likely. */
1831 { emit_line_note ($<filename>-1, $<lineno>0);
1832 c_expand_start_cond (truthvalue_conversion ($3), 0,
1834 $<itype>$ = stmt_count;
1835 if_stmt_file = $<filename>-1;
1836 if_stmt_line = $<lineno>0;
1837 position_after_white_space (); }
1840 /* This is a subroutine of stmt.
1841 It is used twice, once for valid DO statements
1842 and once for catching errors in parsing the end test. */
1847 emit_line_note ($<filename>-1, $<lineno>0);
1848 /* See comment in `while' alternative, above. */
1850 expand_start_loop_continue_elsewhere (1);
1851 position_after_white_space (); }
1852 lineno_labeled_stmt WHILE
1853 { expand_loop_continue_here (); }
1857 { $$ = input_filename; }
1864 lineno_labeled_stmt:
1865 save_filename save_lineno stmt
1867 /* | save_filename save_lineno error
1870 | save_filename save_lineno label lineno_labeled_stmt
1874 lineno_stmt_or_label:
1875 save_filename save_lineno stmt_or_label
1886 /* Parse a single real statement, not including any labels. */
1893 emit_line_note ($<filename>-1, $<lineno>0);
1894 /* It appears that this should not be done--that a non-lvalue array
1895 shouldn't get an error if the value isn't used.
1896 Section 3.2.2.1 says that an array lvalue gets converted to a pointer
1897 if it appears as a top-level expression,
1898 but says nothing about non-lvalue arrays. */
1900 /* Call default_conversion to get an error
1901 on referring to a register array if pedantic. */
1902 if (TREE_CODE (TREE_TYPE ($1)) == ARRAY_TYPE
1903 || TREE_CODE (TREE_TYPE ($1)) == FUNCTION_TYPE)
1904 $1 = default_conversion ($1);
1906 iterator_expand ($1); }
1908 { c_expand_start_else ();
1909 $<itype>1 = stmt_count;
1910 position_after_white_space (); }
1912 { c_expand_end_cond ();
1913 if (extra_warnings && stmt_count == $<itype>1)
1914 warning ("empty body in an else-statement"); }
1915 | simple_if %prec IF
1916 { c_expand_end_cond ();
1917 /* This warning is here instead of in simple_if, because we
1918 do not want a warning if an empty if is followed by an
1919 else statement. Increment stmt_count so we don't
1920 give a second error if this is a nested `if'. */
1921 if (extra_warnings && stmt_count++ == $<itype>1)
1922 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1923 "empty body in an if-statement"); }
1924 /* Make sure c_expand_end_cond is run once
1925 for each call to c_expand_start_cond.
1926 Otherwise a crash is likely. */
1927 | simple_if ELSE error
1928 { c_expand_end_cond (); }
1931 emit_line_note ($<filename>-1, $<lineno>0);
1932 /* The emit_nop used to come before emit_line_note,
1933 but that made the nop seem like part of the preceding line.
1934 And that was confusing when the preceding line was
1935 inside of an if statement and was not really executed.
1936 I think it ought to work to put the nop after the line number.
1937 We will see. --rms, July 15, 1991. */
1940 { /* Don't start the loop till we have succeeded
1941 in parsing the end test. This is to make sure
1942 that we end every loop we start. */
1943 expand_start_loop (1);
1944 emit_line_note (input_filename, lineno);
1945 expand_exit_loop_if_false (NULL_PTR,
1946 truthvalue_conversion ($4));
1947 position_after_white_space (); }
1949 { expand_end_loop (); }
1952 { emit_line_note (input_filename, lineno);
1953 expand_exit_loop_if_false (NULL_PTR,
1954 truthvalue_conversion ($3));
1955 expand_end_loop (); }
1956 /* This rule is needed to make sure we end every loop we start. */
1957 | do_stmt_start error
1958 { expand_end_loop (); }
1962 emit_line_note ($<filename>-1, $<lineno>0);
1963 /* See comment in `while' alternative, above. */
1965 if ($3) c_expand_expr_stmt ($3);
1966 /* Next step is to call expand_start_loop_continue_elsewhere,
1967 but wait till after we parse the entire for (...).
1968 Otherwise, invalid input might cause us to call that
1969 fn without calling expand_end_loop. */
1972 /* Can't emit now; wait till after expand_start_loop... */
1973 { $<lineno>7 = lineno;
1974 $<filename>$ = input_filename; }
1977 /* Start the loop. Doing this after parsing
1978 all the expressions ensures we will end the loop. */
1979 expand_start_loop_continue_elsewhere (1);
1980 /* Emit the end-test, with a line number. */
1981 emit_line_note ($<filename>8, $<lineno>7);
1983 expand_exit_loop_if_false (NULL_PTR,
1984 truthvalue_conversion ($6));
1985 $<lineno>7 = lineno;
1986 $<filename>8 = input_filename;
1987 position_after_white_space (); }
1989 { /* Emit the increment expression, with a line number. */
1990 emit_line_note ($<filename>8, $<lineno>7);
1991 expand_loop_continue_here ();
1993 c_expand_expr_stmt ($9);
1994 expand_end_loop (); }
1995 | SWITCH '(' expr ')'
1997 emit_line_note ($<filename>-1, $<lineno>0);
1998 c_expand_start_case ($3);
1999 position_after_white_space (); }
2001 { expand_end_case ($3); }
2004 emit_line_note ($<filename>-1, $<lineno>0);
2005 if ( ! expand_exit_something ())
2006 error ("break statement not within loop or switch"); }
2009 emit_line_note ($<filename>-1, $<lineno>0);
2010 if (! expand_continue_loop (NULL_PTR))
2011 error ("continue statement not within a loop"); }
2014 emit_line_note ($<filename>-1, $<lineno>0);
2015 c_expand_return (NULL_TREE); }
2018 emit_line_note ($<filename>-1, $<lineno>0);
2019 c_expand_return ($2); }
2020 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
2022 emit_line_note ($<filename>-1, $<lineno>0);
2024 if ((TREE_CODE ($4) == ADDR_EXPR
2025 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
2026 || TREE_CODE ($4) == STRING_CST)
2029 error ("argument of `asm' is not a constant string"); }
2030 /* This is the case with just output operands. */
2031 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
2033 emit_line_note ($<filename>-1, $<lineno>0);
2034 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
2035 $2 == ridpointers[(int)RID_VOLATILE],
2036 input_filename, lineno); }
2037 /* This is the case with input operands as well. */
2038 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
2040 emit_line_note ($<filename>-1, $<lineno>0);
2041 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
2042 $2 == ridpointers[(int)RID_VOLATILE],
2043 input_filename, lineno); }
2044 /* This is the case with clobbered registers as well. */
2045 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
2046 asm_operands ':' asm_clobbers ')' ';'
2048 emit_line_note ($<filename>-1, $<lineno>0);
2049 c_expand_asm_operands ($4, $6, $8, $10,
2050 $2 == ridpointers[(int)RID_VOLATILE],
2051 input_filename, lineno); }
2052 | GOTO identifier ';'
2055 emit_line_note ($<filename>-1, $<lineno>0);
2056 decl = lookup_label ($2);
2059 TREE_USED (decl) = 1;
2065 pedwarn ("ANSI C forbids `goto *expr;'");
2067 emit_line_note ($<filename>-1, $<lineno>0);
2068 expand_computed_goto (convert (ptr_type_node, $3)); }
2073 all_iter_stmt_simple
2074 /* | all_iter_stmt_with_decl */
2077 all_iter_stmt_simple:
2080 /* The value returned by this action is */
2081 /* 1 if everything is OK */
2082 /* 0 in case of error or already bound iterator */
2085 if (TREE_CODE ($3) != VAR_DECL)
2086 error ("invalid `for (ITERATOR)' syntax");
2087 else if (! ITERATOR_P ($3))
2088 error ("`%s' is not an iterator",
2089 IDENTIFIER_POINTER (DECL_NAME ($3)));
2090 else if (ITERATOR_BOUND_P ($3))
2091 error ("`for (%s)' inside expansion of same iterator",
2092 IDENTIFIER_POINTER (DECL_NAME ($3)));
2096 iterator_for_loop_start ($3);
2102 iterator_for_loop_end ($3);
2105 /* This really should allow any kind of declaration,
2106 for generality. Fix it before turning it back on.
2108 all_iter_stmt_with_decl:
2109 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
2111 */ /* The value returned by this action is */
2112 /* 1 if everything is OK */
2113 /* 0 in case of error or already bound iterator */
2115 iterator_for_loop_start ($6);
2119 iterator_for_loop_end ($6);
2120 emit_line_note (input_filename, lineno);
2121 expand_end_bindings (getdecls (), 1, 0);
2122 $<ttype>$ = poplevel (1, 1, 0);
2126 /* Any kind of label, including jump labels and case labels.
2127 ANSI C accepts labels only before statements, but we allow them
2128 also at the end of a compound statement. */
2130 label: CASE expr_no_commas ':'
2131 { register tree value = check_case_value ($2);
2133 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2137 if (value != error_mark_node)
2142 if (pedantic && ! INTEGRAL_TYPE_P (TREE_TYPE (value)))
2143 pedwarn ("label must have integral type in ANSI C");
2145 success = pushcase (value, convert_and_check,
2149 error ("case label not within a switch statement");
2150 else if (success == 2)
2152 error ("duplicate case value");
2153 error_with_decl (duplicate, "this is the first entry for that value");
2155 else if (success == 3)
2156 warning ("case value out of range");
2157 else if (success == 5)
2158 error ("case label within scope of cleanup or variable array");
2160 position_after_white_space (); }
2161 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
2162 { register tree value1 = check_case_value ($2);
2163 register tree value2 = check_case_value ($4);
2165 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2168 pedwarn ("ANSI C forbids case ranges");
2171 if (value1 != error_mark_node && value2 != error_mark_node)
2174 int success = pushcase_range (value1, value2,
2175 convert_and_check, label,
2178 error ("case label not within a switch statement");
2179 else if (success == 2)
2181 error ("duplicate case value");
2182 error_with_decl (duplicate, "this is the first entry for that value");
2184 else if (success == 3)
2185 warning ("case value out of range");
2186 else if (success == 4)
2187 warning ("empty case range");
2188 else if (success == 5)
2189 error ("case label within scope of cleanup or variable array");
2191 position_after_white_space (); }
2196 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2197 int success = pushcase (NULL_TREE, 0, label, &duplicate);
2200 error ("default label not within a switch statement");
2201 else if (success == 2)
2203 error ("multiple default labels in one switch");
2204 error_with_decl (duplicate, "this is the first default label");
2206 position_after_white_space (); }
2207 | identifier ':' maybe_attribute
2208 { tree label = define_label (input_filename, lineno, $1);
2213 expand_label (label);
2214 decl_attributes (label, $3, NULL_TREE);
2216 position_after_white_space (); }
2219 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
2223 { emit_line_note (input_filename, lineno);
2226 { emit_line_note (input_filename, lineno); }
2235 /* These are the operands other than the first string and colon
2236 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
2237 asm_operands: /* empty */
2239 | nonnull_asm_operands
2242 nonnull_asm_operands:
2244 | nonnull_asm_operands ',' asm_operand
2245 { $$ = chainon ($1, $3); }
2250 { $$ = build_tree_list ($1, $3); }
2255 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
2256 | asm_clobbers ',' string
2257 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
2260 /* This is what appears inside the parens in a function declarator.
2261 Its value is a list of ..._TYPE nodes. */
2264 clear_parm_order ();
2265 declare_parm_level (0); }
2268 parmlist_tags_warning ();
2269 poplevel (0, 0, 0); }
2277 pedwarn ("ANSI C forbids forward parameter declarations");
2278 /* Mark the forward decls as such. */
2279 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
2280 TREE_ASM_WRITTEN (parm) = 1;
2281 clear_parm_order (); }
2285 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
2288 /* This is what appears inside the parens in a function declarator.
2289 Is value is represented in the format that grokdeclarator expects. */
2290 parmlist_2: /* empty */
2291 { $$ = get_parm_info (0); }
2293 { $$ = get_parm_info (0);
2294 /* Gcc used to allow this as an extension. However, it does
2295 not work for all targets, and thus has been disabled.
2296 Also, since func (...) and func () are indistinguishable,
2297 it caused problems with the code in expand_builtin which
2298 tries to verify that BUILT_IN_NEXT_ARG is being used
2300 error ("ANSI C requires a named argument before `...'");
2303 { $$ = get_parm_info (1); }
2304 | parms ',' ELLIPSIS
2305 { $$ = get_parm_info (0); }
2310 { push_parm_decl ($1); }
2312 { push_parm_decl ($3); }
2315 /* A single parameter declaration or parameter type name,
2316 as found in a parmlist. */
2318 typed_declspecs setspecs parm_declarator maybe_attribute
2319 { $$ = build_tree_list (build_tree_list (current_declspecs,
2321 build_tree_list (prefix_attributes,
2323 current_declspecs = TREE_VALUE (declspec_stack);
2324 prefix_attributes = TREE_PURPOSE (declspec_stack);
2325 declspec_stack = TREE_CHAIN (declspec_stack); }
2326 | typed_declspecs setspecs notype_declarator maybe_attribute
2327 { $$ = build_tree_list (build_tree_list (current_declspecs,
2329 build_tree_list (prefix_attributes,
2331 current_declspecs = TREE_VALUE (declspec_stack);
2332 prefix_attributes = TREE_PURPOSE (declspec_stack);
2333 declspec_stack = TREE_CHAIN (declspec_stack); }
2334 | typed_declspecs setspecs absdcl maybe_attribute
2335 { $$ = build_tree_list (build_tree_list (current_declspecs,
2337 build_tree_list (prefix_attributes,
2339 current_declspecs = TREE_VALUE (declspec_stack);
2340 prefix_attributes = TREE_PURPOSE (declspec_stack);
2341 declspec_stack = TREE_CHAIN (declspec_stack); }
2342 | declmods setspecs notype_declarator maybe_attribute
2343 { $$ = build_tree_list (build_tree_list (current_declspecs,
2345 build_tree_list (prefix_attributes,
2347 current_declspecs = TREE_VALUE (declspec_stack);
2348 prefix_attributes = TREE_PURPOSE (declspec_stack);
2349 declspec_stack = TREE_CHAIN (declspec_stack); }
2351 | declmods setspecs absdcl maybe_attribute
2352 { $$ = build_tree_list (build_tree_list (current_declspecs,
2354 build_tree_list (prefix_attributes,
2356 current_declspecs = TREE_VALUE (declspec_stack);
2357 prefix_attributes = TREE_PURPOSE (declspec_stack);
2358 declspec_stack = TREE_CHAIN (declspec_stack); }
2361 /* This is used in a function definition
2362 where either a parmlist or an identifier list is ok.
2363 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2364 parmlist_or_identifiers:
2366 clear_parm_order ();
2367 declare_parm_level (1); }
2368 parmlist_or_identifiers_1
2370 parmlist_tags_warning ();
2371 poplevel (0, 0, 0); }
2374 parmlist_or_identifiers_1:
2378 for (t = $1; t; t = TREE_CHAIN (t))
2379 if (TREE_VALUE (t) == NULL_TREE)
2380 error ("`...' in old-style identifier list");
2381 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2384 /* A nonempty list of identifiers. */
2387 { $$ = build_tree_list (NULL_TREE, $1); }
2388 | identifiers ',' IDENTIFIER
2389 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2392 /* A nonempty list of identifiers, including typenames. */
2393 identifiers_or_typenames:
2395 { $$ = build_tree_list (NULL_TREE, $1); }
2396 | identifiers_or_typenames ',' identifier
2397 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2402 { $$ = SAVE_WARN_FLAGS();
2404 warn_pointer_arith = 0; }
2408 /* Objective-C productions. */
2418 if (objc_implementation_context)
2420 finish_class (objc_implementation_context);
2421 objc_ivar_chain = NULL_TREE;
2422 objc_implementation_context = NULL_TREE;
2425 warning ("`@end' must appear in an implementation context");
2429 /* A nonempty list of identifiers. */
2432 { $$ = build_tree_list (NULL_TREE, $1); }
2433 | identifier_list ',' identifier
2434 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2438 CLASS identifier_list ';'
2440 objc_declare_class ($2);
2444 ALIAS identifier identifier ';'
2446 objc_declare_alias ($2, $3);
2450 INTERFACE identifier protocolrefs '{'
2452 objc_interface_context = objc_ivar_context
2453 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2454 objc_public_flag = 0;
2458 continue_class (objc_interface_context);
2463 finish_class (objc_interface_context);
2464 objc_interface_context = NULL_TREE;
2467 | INTERFACE identifier protocolrefs
2469 objc_interface_context
2470 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2471 continue_class (objc_interface_context);
2476 finish_class (objc_interface_context);
2477 objc_interface_context = NULL_TREE;
2480 | INTERFACE identifier ':' identifier protocolrefs '{'
2482 objc_interface_context = objc_ivar_context
2483 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2484 objc_public_flag = 0;
2488 continue_class (objc_interface_context);
2493 finish_class (objc_interface_context);
2494 objc_interface_context = NULL_TREE;
2497 | INTERFACE identifier ':' identifier protocolrefs
2499 objc_interface_context
2500 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2501 continue_class (objc_interface_context);
2506 finish_class (objc_interface_context);
2507 objc_interface_context = NULL_TREE;
2510 | IMPLEMENTATION identifier '{'
2512 objc_implementation_context = objc_ivar_context
2513 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2514 objc_public_flag = 0;
2519 = continue_class (objc_implementation_context);
2522 | IMPLEMENTATION identifier
2524 objc_implementation_context
2525 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2527 = continue_class (objc_implementation_context);
2530 | IMPLEMENTATION identifier ':' identifier '{'
2532 objc_implementation_context = objc_ivar_context
2533 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2534 objc_public_flag = 0;
2539 = continue_class (objc_implementation_context);
2542 | IMPLEMENTATION identifier ':' identifier
2544 objc_implementation_context
2545 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2547 = continue_class (objc_implementation_context);
2550 | INTERFACE identifier '(' identifier ')' protocolrefs
2552 objc_interface_context
2553 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2554 continue_class (objc_interface_context);
2559 finish_class (objc_interface_context);
2560 objc_interface_context = NULL_TREE;
2563 | IMPLEMENTATION identifier '(' identifier ')'
2565 objc_implementation_context
2566 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2568 = continue_class (objc_implementation_context);
2573 PROTOCOL identifier protocolrefs
2575 remember_protocol_qualifiers ();
2576 objc_interface_context
2577 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2581 forget_protocol_qualifiers();
2582 finish_protocol(objc_interface_context);
2583 objc_interface_context = NULL_TREE;
2592 | non_empty_protocolrefs
2595 non_empty_protocolrefs:
2596 ARITHCOMPARE identifier_list ARITHCOMPARE
2598 if ($1 == LT_EXPR && $3 == GT_EXPR)
2606 ivar_decl_list visibility_spec ivar_decls
2611 PRIVATE { objc_public_flag = 2; }
2612 | PROTECTED { objc_public_flag = 0; }
2613 | PUBLIC { objc_public_flag = 1; }
2621 | ivar_decls ivar_decl ';'
2625 pedwarn ("extra semicolon in struct or union specified");
2630 /* There is a shift-reduce conflict here, because `components' may
2631 start with a `typename'. It happens that shifting (the default resolution)
2632 does the right thing, because it treats the `typename' as part of
2633 a `typed_typespecs'.
2635 It is possible that this same technique would allow the distinction
2636 between `notype_initdecls' and `initdecls' to be eliminated.
2637 But I am being cautious and not trying it. */
2640 typed_typespecs setspecs ivars
2642 current_declspecs = TREE_VALUE (declspec_stack);
2643 prefix_attributes = TREE_PURPOSE (declspec_stack);
2644 declspec_stack = TREE_CHAIN (declspec_stack); }
2645 | nonempty_type_quals setspecs ivars
2647 current_declspecs = TREE_VALUE (declspec_stack);
2648 prefix_attributes = TREE_PURPOSE (declspec_stack);
2649 declspec_stack = TREE_CHAIN (declspec_stack); }
2658 | ivars ',' ivar_declarator
2664 $$ = add_instance_variable (objc_ivar_context,
2666 $1, current_declspecs,
2669 | declarator ':' expr_no_commas
2671 $$ = add_instance_variable (objc_ivar_context,
2673 $1, current_declspecs, $3);
2675 | ':' expr_no_commas
2677 $$ = add_instance_variable (objc_ivar_context,
2680 current_declspecs, $2);
2687 remember_protocol_qualifiers ();
2688 if (objc_implementation_context)
2689 objc_inherit_code = CLASS_METHOD_DECL;
2691 fatal ("method definition not in class context");
2695 forget_protocol_qualifiers ();
2696 add_class_method (objc_implementation_context, $3);
2697 start_method_def ($3);
2698 objc_method_context = $3;
2702 continue_method_def ();
2706 finish_method_def ();
2707 objc_method_context = NULL_TREE;
2712 remember_protocol_qualifiers ();
2713 if (objc_implementation_context)
2714 objc_inherit_code = INSTANCE_METHOD_DECL;
2716 fatal ("method definition not in class context");
2720 forget_protocol_qualifiers ();
2721 add_instance_method (objc_implementation_context, $3);
2722 start_method_def ($3);
2723 objc_method_context = $3;
2727 continue_method_def ();
2731 finish_method_def ();
2732 objc_method_context = NULL_TREE;
2736 /* the reason for the strange actions in this rule
2737 is so that notype_initdecls when reached via datadef
2738 can find a valid list of type and sc specs in $0. */
2742 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2745 methodprotolist2: /* eliminates a shift/reduce conflict */
2748 | methodprotolist2 methodproto
2749 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2760 /* Remember protocol qualifiers in prototypes. */
2761 remember_protocol_qualifiers ();
2762 objc_inherit_code = CLASS_METHOD_DECL;
2766 /* Forget protocol qualifiers here. */
2767 forget_protocol_qualifiers ();
2768 add_class_method (objc_interface_context, $3);
2774 /* Remember protocol qualifiers in prototypes. */
2775 remember_protocol_qualifiers ();
2776 objc_inherit_code = INSTANCE_METHOD_DECL;
2780 /* Forget protocol qualifiers here. */
2781 forget_protocol_qualifiers ();
2782 add_instance_method (objc_interface_context, $3);
2788 '(' typename ')' unaryselector
2790 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2795 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2798 | '(' typename ')' keywordselector optparmlist
2800 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2803 | keywordselector optparmlist
2805 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2809 /* "optarglist" assumes that start_method_def has already been called...
2810 if it is not, the "xdecls" will not be placed in the proper scope */
2817 /* to get around the following situation: "int foo (int a) int b; {}" that
2818 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2833 typed_declspecs setspecs myparms ';'
2834 { current_declspecs = TREE_VALUE (declspec_stack);
2835 prefix_attributes = TREE_PURPOSE (declspec_stack);
2836 declspec_stack = TREE_CHAIN (declspec_stack); }
2837 | typed_declspecs ';'
2838 { shadow_tag ($1); }
2840 { pedwarn ("empty declaration"); }
2845 { push_parm_decl ($1); }
2846 | myparms ',' myparm
2847 { push_parm_decl ($3); }
2850 /* A single parameter declaration or parameter type name,
2851 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2854 parm_declarator maybe_attribute
2855 { $$ = build_tree_list (build_tree_list (current_declspecs,
2857 build_tree_list (prefix_attributes,
2859 | notype_declarator maybe_attribute
2860 { $$ = build_tree_list (build_tree_list (current_declspecs,
2862 build_tree_list (prefix_attributes,
2864 | absdcl maybe_attribute
2865 { $$ = build_tree_list (build_tree_list (current_declspecs,
2867 build_tree_list (prefix_attributes,
2878 /* oh what a kludge! */
2887 /* returns a tree list node generated by get_parm_info */
2900 | keywordselector keyworddecl
2902 $$ = chainon ($1, $2);
2914 ENUM { $$ = get_identifier (token_buffer); }
2915 | STRUCT { $$ = get_identifier (token_buffer); }
2916 | UNION { $$ = get_identifier (token_buffer); }
2917 | IF { $$ = get_identifier (token_buffer); }
2918 | ELSE { $$ = get_identifier (token_buffer); }
2919 | WHILE { $$ = get_identifier (token_buffer); }
2920 | DO { $$ = get_identifier (token_buffer); }
2921 | FOR { $$ = get_identifier (token_buffer); }
2922 | SWITCH { $$ = get_identifier (token_buffer); }
2923 | CASE { $$ = get_identifier (token_buffer); }
2924 | DEFAULT { $$ = get_identifier (token_buffer); }
2925 | BREAK { $$ = get_identifier (token_buffer); }
2926 | CONTINUE { $$ = get_identifier (token_buffer); }
2927 | RETURN { $$ = get_identifier (token_buffer); }
2928 | GOTO { $$ = get_identifier (token_buffer); }
2929 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2930 | SIZEOF { $$ = get_identifier (token_buffer); }
2931 | TYPEOF { $$ = get_identifier (token_buffer); }
2932 | ALIGNOF { $$ = get_identifier (token_buffer); }
2933 | TYPESPEC | TYPE_QUAL
2937 selector ':' '(' typename ')' identifier
2939 $$ = build_keyword_decl ($1, $4, $6);
2942 | selector ':' identifier
2944 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2947 | ':' '(' typename ')' identifier
2949 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2954 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2965 | keywordarglist keywordarg
2967 $$ = chainon ($1, $2);
2975 if (TREE_CHAIN ($1) == NULL_TREE)
2976 /* just return the expr., remove a level of indirection */
2977 $$ = TREE_VALUE ($1);
2979 /* we have a comma expr., we will collapse later */
2985 selector ':' keywordexpr
2987 $$ = build_tree_list ($1, $3);
2991 $$ = build_tree_list (NULL_TREE, $2);
2999 $$ = get_class_reference ($1);
3005 { objc_receiver_context = 1; }
3007 { objc_receiver_context = 0; }
3010 $$ = build_tree_list ($3, $5);
3021 | keywordnamelist keywordname
3023 $$ = chainon ($1, $2);
3030 $$ = build_tree_list ($1, NULL_TREE);
3034 $$ = build_tree_list (NULL_TREE, NULL_TREE);
3039 SELECTOR '(' selectorarg ')'
3046 PROTOCOL '(' identifier ')'
3052 /* extension to support C-structures in the archiver */
3055 ENCODE '(' typename ')'
3057 $$ = groktypename ($3);