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)
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 The awk script cond.awk is 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. */
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.)
61 #ifdef MULTIBYTE_CHARS
70 /* Since parsers are distinct for each language, put the language string
73 char *language_string = "GNU Obj-C";
76 char *language_string = "GNU C";
85 /* Like YYERROR but do call yyerror. */
86 #define YYERROR1 { yyerror ("syntax error"); YYERROR; }
88 /* Cause the `yydebug' variable to be defined. */
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 */
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. */
106 /* Reserved words that specify storage class.
107 yylval contains an IDENTIFIER_NODE which indicates which one. */
110 /* Reserved words that specify type.
111 yylval contains an IDENTIFIER_NODE which indicates which one. */
114 /* Reserved words that qualify type: "const" or "volatile".
115 yylval contains an IDENTIFIER_NODE which indicates which one. */
118 /* Character or numeric constants.
119 yylval is the node for the constant. */
122 /* String constants in raw form.
123 yylval is a STRING_CST node. */
126 /* "...", used for functions with variable arglists. */
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 */
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> '?' ':'
151 %left <code> EQCOMPARE
152 %left <code> ARITHCOMPARE
153 %left <code> LSHIFT RSHIFT
155 %left <code> '*' '/' '%'
156 %right <code> UNARY PLUSPLUS MINUSMINUS
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. */
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 initlist 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
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
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;
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;
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 ();
258 pedwarn ("ANSI C forbids an empty source file");
265 /* In case there were missing closebraces,
266 get us back to the global binding level. */
267 while (! global_bindings_p ())
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 $0. */
280 {$<ttype>$ = NULL_TREE; } extdef
281 | extdefs {$<ttype>$ = NULL_TREE; } extdef
290 | ASM_KEYWORD '(' expr ')' ';'
292 if ((TREE_CODE ($3) == ADDR_EXPR
293 && TREE_CODE (TREE_OPERAND ($3, 0)) == STRING_CST)
294 || TREE_CODE ($3) == STRING_CST)
297 error ("argument of `asm' is not a constant string"); }
301 setspecs notype_initdecls ';'
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 ';'
308 | typed_declspecs setspecs initdecls ';'
311 { pedwarn ("empty declaration"); }
312 | typed_declspecs ';'
318 pedwarn ("ANSI C does not allow extra `;' outside of a function"); }
322 typed_declspecs setspecs declarator
323 { if (! start_function ($1, $3, 0))
325 reinit_parse_for_function (); }
327 { store_parm_decls (); }
329 { finish_function (0); }
330 | typed_declspecs setspecs declarator error
332 | declmods setspecs notype_declarator
333 { if (! start_function ($1, $3, 0))
335 reinit_parse_for_function (); }
337 { store_parm_decls (); }
339 { finish_function (0); }
340 | declmods setspecs notype_declarator error
342 | setspecs notype_declarator
343 { if (! start_function (NULL_TREE, $2, 0))
345 reinit_parse_for_function (); }
347 { store_parm_decls (); }
349 { finish_function (0); }
350 | setspecs notype_declarator error
366 { $$ = NEGATE_EXPR; }
368 { $$ = CONVERT_EXPR; }
370 { $$ = PREINCREMENT_EXPR; }
372 { $$ = PREDECREMENT_EXPR; }
374 { $$ = BIT_NOT_EXPR; }
376 { $$ = TRUTH_NOT_EXPR; }
379 expr: nonnull_exprlist
380 { $$ = build_compound_expr ($1); }
391 { $$ = build_tree_list (NULL_TREE, $1); }
392 | nonnull_exprlist ',' expr_no_commas
393 { chainon ($1, build_tree_list (NULL_TREE, $3)); }
398 | '*' cast_expr %prec UNARY
399 { $$ = build_indirect_ref ($2, "unary *"); }
400 /* __extension__ turns off -pedantic for following primary. */
402 { $<itype>1 = pedantic;
404 cast_expr %prec UNARY
406 pedantic = $<itype>1; }
407 | unop cast_expr %prec UNARY
408 { $$ = build_unary_op ($1, $2, 0);
409 overflow_warning ($$); }
410 /* Refer to the address of a label as a pointer. */
412 { tree label = lookup_label ($2);
414 $$ = null_pointer_node;
417 TREE_USED (label) = 1;
418 $$ = build1 (ADDR_EXPR, ptr_type_node, label);
419 TREE_CONSTANT ($$) = 1;
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.
425 { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
426 $$ = error_mark_node;
427 if (TREE_VALUE (tree_last (types)) == void_type_node)
428 error ("`&...' used in function with fixed number of arguments");
432 pedwarn ("ANSI C forbids `&...'");
433 $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
434 $$ = build_unary_op (ADDR_EXPR, $$, 0);
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); }
456 | '(' typename ')' cast_expr %prec UNARY
457 { tree type = groktypename ($2);
458 $$ = build_c_cast (type, $4); }
459 | '(' typename ')' '{' initlist maybecomma '}' %prec UNARY
460 { tree type = groktypename ($2);
463 pedwarn ("ANSI C forbids constructor expressions");
464 if (TYPE_NAME (type) != 0)
466 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
467 name = IDENTIFIER_POINTER (TYPE_NAME (type));
469 name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
473 $$ = digest_init (type, build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($5)),
474 NULL_PTR, 0, 0, name);
475 if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0)
477 int failure = complete_array_type (type, $$, 1);
486 | expr_no_commas '+' expr_no_commas
487 { $$ = parser_build_binary_op ($2, $1, $3); }
488 | expr_no_commas '-' expr_no_commas
489 { $$ = parser_build_binary_op ($2, $1, $3); }
490 | expr_no_commas '*' expr_no_commas
491 { $$ = parser_build_binary_op ($2, $1, $3); }
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 LSHIFT expr_no_commas
497 { $$ = parser_build_binary_op ($2, $1, $3); }
498 | expr_no_commas RSHIFT expr_no_commas
499 { $$ = parser_build_binary_op ($2, $1, $3); }
500 | expr_no_commas ARITHCOMPARE expr_no_commas
501 { $$ = parser_build_binary_op ($2, $1, $3); }
502 | expr_no_commas EQCOMPARE expr_no_commas
503 { $$ = parser_build_binary_op ($2, $1, $3); }
504 | expr_no_commas '&' expr_no_commas
505 { $$ = parser_build_binary_op ($2, $1, $3); }
506 | expr_no_commas '|' expr_no_commas
507 { $$ = parser_build_binary_op ($2, $1, $3); }
508 | expr_no_commas '^' expr_no_commas
509 { $$ = parser_build_binary_op ($2, $1, $3); }
510 | expr_no_commas ANDAND expr_no_commas
511 { $$ = parser_build_binary_op (TRUTH_ANDIF_EXPR, $1, $3); }
512 | expr_no_commas OROR expr_no_commas
513 { $$ = parser_build_binary_op (TRUTH_ORIF_EXPR, $1, $3); }
514 | expr_no_commas '?' xexpr ':' expr_no_commas
515 { $$ = build_conditional_expr ($1, $3, $5); }
516 | expr_no_commas '=' expr_no_commas
517 { $$ = build_modify_expr ($1, NOP_EXPR, $3);
518 C_SET_EXP_ORIGINAL_CODE ($$, MODIFY_EXPR); }
519 | expr_no_commas ASSIGN expr_no_commas
520 { $$ = build_modify_expr ($1, $2, $3);
521 /* This inhibits warnings in truthvalue_conversion. */
522 C_SET_EXP_ORIGINAL_CODE ($$, ERROR_MARK); }
531 if (!$$ || $$ == error_mark_node)
533 if (yychar == YYEMPTY)
540 if (objc_receiver_context
541 && ! (objc_receiver_context
542 && strcmp (IDENTIFIER_POINTER ($1), "super")))
543 /* we have a message to super */
544 $$ = get_super_receiver ();
545 else if (objc_method_context
546 && (decl = is_ivar (objc_ivar_chain, $1)))
548 if (is_private (decl))
549 $$ = error_mark_node;
551 $$ = build_ivar_reference ($1);
556 /* Ordinary implicit function declaration. */
557 $$ = implicitly_declare ($1);
558 assemble_external ($$);
562 else if (current_function_decl == 0)
564 error ("`%s' undeclared here (not in a function)",
565 IDENTIFIER_POINTER ($1));
566 $$ = error_mark_node;
573 if (objc_receiver_context
574 && ! strcmp (IDENTIFIER_POINTER ($1), "super"))
575 /* we have a message to super */
576 $$ = get_super_receiver ();
577 else if (objc_method_context
578 && (decl = is_ivar (objc_ivar_chain, $1)))
580 if (is_private (decl))
581 $$ = error_mark_node;
583 $$ = build_ivar_reference ($1);
588 if (IDENTIFIER_GLOBAL_VALUE ($1) != error_mark_node
589 || IDENTIFIER_ERROR_LOCUS ($1) != current_function_decl)
591 error ("`%s' undeclared (first use this function)",
592 IDENTIFIER_POINTER ($1));
594 if (! undeclared_variable_notice)
596 error ("(Each undeclared identifier is reported only once");
597 error ("for each function it appears in.)");
598 undeclared_variable_notice = 1;
601 $$ = error_mark_node;
602 /* Prevent repeated error messages. */
603 IDENTIFIER_GLOBAL_VALUE ($1) = error_mark_node;
604 IDENTIFIER_ERROR_LOCUS ($1) = current_function_decl;
608 else if (TREE_TYPE ($$) == error_mark_node)
609 $$ = error_mark_node;
610 else if (C_DECL_ANTICIPATED ($$))
612 /* The first time we see a build-in function used,
613 if it has not been declared. */
614 C_DECL_ANTICIPATED ($$) = 0;
615 if (yychar == YYEMPTY)
619 /* Omit the implicit declaration we
620 would ordinarily do, so we don't lose
621 the actual built in type.
622 But print a diagnostic for the mismatch. */
624 if (objc_method_context
625 && is_ivar (objc_ivar_chain, $1))
626 error ("Instance variable `%s' implicitly declared as function",
627 IDENTIFIER_POINTER (DECL_NAME ($$)));
630 if (TREE_CODE ($$) != FUNCTION_DECL)
631 error ("`%s' implicitly declared as function",
632 IDENTIFIER_POINTER (DECL_NAME ($$)));
633 else if ((TYPE_MODE (TREE_TYPE (TREE_TYPE ($$)))
634 != TYPE_MODE (integer_type_node))
635 && (TREE_TYPE (TREE_TYPE ($$))
637 pedwarn ("type mismatch in implicit declaration for built-in function `%s'",
638 IDENTIFIER_POINTER (DECL_NAME ($$)));
639 /* If it really returns void, change that to int. */
640 if (TREE_TYPE (TREE_TYPE ($$)) == void_type_node)
642 = build_function_type (integer_type_node,
643 TYPE_ARG_TYPES (TREE_TYPE ($$)));
646 pedwarn ("built-in function `%s' used without declaration",
647 IDENTIFIER_POINTER (DECL_NAME ($$)));
649 /* Do what we would ordinarily do when a fn is used. */
650 assemble_external ($$);
655 assemble_external ($$);
658 /* we have a definition - still check if iVariable */
660 if (!objc_receiver_context
661 || (objc_receiver_context
662 && strcmp (IDENTIFIER_POINTER ($1), "super")))
666 if (objc_method_context
667 && (decl = is_ivar (objc_ivar_chain, $1)))
669 if (IDENTIFIER_LOCAL_VALUE ($1))
670 warning ("local declaration of `%s' hides instance variable",
671 IDENTIFIER_POINTER ($1));
674 if (is_private (decl))
675 $$ = error_mark_node;
677 $$ = build_ivar_reference ($1);
681 else /* we have a message to super */
682 $$ = get_super_receiver ();
686 if (TREE_CODE ($$) == CONST_DECL)
688 $$ = DECL_INITIAL ($$);
689 /* This is to prevent an enum whose value is 0
690 from being considered a null pointer constant. */
691 $$ = build1 (NOP_EXPR, TREE_TYPE ($$), $$);
692 TREE_CONSTANT ($$) = 1;
697 { $$ = combine_strings ($1); }
699 { char class = TREE_CODE_CLASS (TREE_CODE ($2));
700 if (class == 'e' || class == '1'
701 || class == '2' || class == '<')
702 C_SET_EXP_ORIGINAL_CODE ($2, ERROR_MARK);
705 { $$ = error_mark_node; }
707 { if (current_function_decl == 0)
709 error ("braced-group within expression allowed only inside a function");
712 /* We must force a BLOCK for this level
713 so that, if it is not expanded later,
714 there is a way to turn off the entire subtree of blocks
715 that are contained in it. */
717 push_iterator_stack ();
719 $<ttype>$ = expand_start_stmt_expr (); }
723 pedwarn ("ANSI C forbids braced-groups within expressions");
724 pop_iterator_stack ();
726 rtl_exp = expand_end_stmt_expr ($<ttype>2);
727 /* The statements have side effects, so the group does. */
728 TREE_SIDE_EFFECTS (rtl_exp) = 1;
730 /* Make a BIND_EXPR for the BLOCK already made. */
731 $$ = build (BIND_EXPR, TREE_TYPE (rtl_exp),
732 NULL_TREE, rtl_exp, $3);
733 /* Remove the block from the tree at this point.
734 It gets put back at the proper place
735 when the BIND_EXPR is expanded. */
738 | primary '(' exprlist ')' %prec '.'
739 { $$ = build_function_call ($1, $3); }
740 | primary '[' expr ']' %prec '.'
741 { $$ = build_array_ref ($1, $3); }
742 | primary '.' identifier
745 if (doing_objc_thang)
747 if (is_public ($1, $3))
748 $$ = build_component_ref ($1, $3);
750 $$ = error_mark_node;
754 $$ = build_component_ref ($1, $3);
756 | primary POINTSAT identifier
758 tree expr = build_indirect_ref ($1, "->");
761 if (doing_objc_thang)
763 if (is_public (expr, $3))
764 $$ = build_component_ref (expr, $3);
766 $$ = error_mark_node;
770 $$ = build_component_ref (expr, $3);
773 { $$ = build_unary_op (POSTINCREMENT_EXPR, $1, 0); }
775 { $$ = build_unary_op (POSTDECREMENT_EXPR, $1, 0); }
778 { $$ = build_message_expr ($1); }
780 { $$ = build_selector_expr ($1); }
782 { $$ = build_protocol_expr ($1); }
784 { $$ = build_encode_expr ($1); }
786 { $$ = build_objc_string_object ($1); }
790 /* Produces a STRING_CST with perhaps more STRING_CSTs chained onto it. */
794 { $$ = chainon ($1, $2); }
798 /* Produces an OBJC_STRING_CST with prehaps more OBJC_STRING_CSTs chained
802 | objc_string OBJC_STRING
803 { $$ = chainon ($1, $2); }
811 /* ... is used here to indicate a varargs function. */
814 pedwarn ("ANSI C does not permit use of `varargs.h'"); }
817 /* The following are analogous to lineno_decl, decls and decl
818 except that they do not allow nested functions.
819 They are used for old-style parm decls. */
821 save_filename save_lineno datadecl
828 | datadecls lineno_datadecl
829 | lineno_datadecl errstmt
833 typed_declspecs setspecs initdecls ';'
834 { current_declspecs = TREE_VALUE (declspec_stack);
835 declspec_stack = TREE_CHAIN (declspec_stack);
836 resume_momentary ($2); }
837 | declmods setspecs notype_initdecls ';'
838 { current_declspecs = TREE_VALUE (declspec_stack);
839 declspec_stack = TREE_CHAIN (declspec_stack);
840 resume_momentary ($2); }
841 | typed_declspecs ';'
842 { shadow_tag_warned ($1, 1);
843 pedwarn ("empty declaration"); }
845 { pedwarn ("empty declaration"); }
848 /* This combination which saves a lineno before a decl
849 is the normal thing to use, rather than decl itself.
850 This is to avoid shift/reduce conflicts in contexts
851 where statement labels are allowed. */
853 save_filename save_lineno decl
861 | lineno_decl errstmt
864 /* records the type and storage class specs to use for processing
865 the declarators that follow.
866 Maintains a stack of outer-level values of current_declspecs,
867 for the sake of parm declarations nested in function declarators. */
868 setspecs: /* empty */
869 { $$ = suspend_momentary ();
870 pending_xref_error ();
871 declspec_stack = tree_cons (NULL_TREE, current_declspecs,
873 current_declspecs = $<ttype>0; }
877 typed_declspecs setspecs initdecls ';'
878 { current_declspecs = TREE_VALUE (declspec_stack);
879 declspec_stack = TREE_CHAIN (declspec_stack);
880 resume_momentary ($2); }
881 | declmods setspecs notype_initdecls ';'
882 { current_declspecs = TREE_VALUE (declspec_stack);
883 declspec_stack = TREE_CHAIN (declspec_stack);
884 resume_momentary ($2); }
885 | typed_declspecs setspecs nested_function
886 { current_declspecs = TREE_VALUE (declspec_stack);
887 declspec_stack = TREE_CHAIN (declspec_stack);
888 resume_momentary ($2); }
889 | declmods setspecs notype_nested_function
890 { current_declspecs = TREE_VALUE (declspec_stack);
891 declspec_stack = TREE_CHAIN (declspec_stack);
892 resume_momentary ($2); }
893 | typed_declspecs ';'
896 { pedwarn ("empty declaration"); }
899 /* Declspecs which contain at least one type specifier or typedef name.
900 (Just `const' or `volatile' is not enough.)
901 A typedef'd name following these is taken as a name to be declared. */
904 typespec reserved_declspecs
905 { $$ = tree_cons (NULL_TREE, $1, $2); }
906 | declmods typespec reserved_declspecs
907 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
910 reserved_declspecs: /* empty */
912 | reserved_declspecs typespecqual_reserved
913 { $$ = tree_cons (NULL_TREE, $2, $1); }
914 | reserved_declspecs SCSPEC
915 { if (extra_warnings)
916 warning ("`%s' is not at beginning of declaration",
917 IDENTIFIER_POINTER ($2));
918 $$ = tree_cons (NULL_TREE, $2, $1); }
921 /* List of just storage classes and type modifiers.
922 A declaration can start with just this, but then it cannot be used
923 to redeclare a typedef-name. */
927 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE);
928 TREE_STATIC ($$) = 1; }
930 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
932 { $$ = tree_cons (NULL_TREE, $2, $1);
933 TREE_STATIC ($$) = 1; }
935 { if (extra_warnings && TREE_STATIC ($1))
936 warning ("`%s' is not at beginning of declaration",
937 IDENTIFIER_POINTER ($2));
938 $$ = tree_cons (NULL_TREE, $2, $1);
939 TREE_STATIC ($$) = TREE_STATIC ($1); }
943 /* Used instead of declspecs where storage classes are not allowed
944 (that is, for typenames and structure components).
945 Don't accept a typedef-name if anything but a modifier precedes it. */
948 typespec reserved_typespecquals
949 { $$ = tree_cons (NULL_TREE, $1, $2); }
950 | nonempty_type_quals typespec reserved_typespecquals
951 { $$ = chainon ($3, tree_cons (NULL_TREE, $2, $1)); }
954 reserved_typespecquals: /* empty */
956 | reserved_typespecquals typespecqual_reserved
957 { $$ = tree_cons (NULL_TREE, $2, $1); }
960 /* A typespec (but not a type qualifier).
961 Once we have seen one of these in a declaration,
962 if a typedef name appears then it is being redeclared. */
967 { /* For a typedef name, record the meaning, not the name.
968 In case of `foo foo, bar;'. */
969 $$ = lookup_name ($1); }
971 | CLASSNAME protocolrefs
972 { $$ = get_static_reference ($1, $2); }
973 | OBJECTNAME protocolrefs
974 { $$ = get_object_reference ($2); }
976 | TYPEOF '(' expr ')'
977 { $$ = TREE_TYPE ($3); }
978 | TYPEOF '(' typename ')'
979 { $$ = groktypename ($3); }
982 /* A typespec that is a reserved word, or a type qualifier. */
984 typespecqual_reserved: TYPESPEC
991 | initdecls ',' initdcl
996 | notype_initdecls ',' initdcl
1002 | ASM_KEYWORD '(' string ')'
1003 { if (TREE_CHAIN ($3)) $3 = combine_strings ($3);
1009 declarator maybeasm maybe_attribute '='
1010 { $<ttype>$ = start_decl ($1, current_declspecs, 1); }
1012 /* Note how the declaration of the variable is in effect while its init is parsed! */
1013 { decl_attributes ($<ttype>5, $3);
1014 finish_decl ($<ttype>5, $6, $2); }
1015 | declarator maybeasm maybe_attribute
1016 { tree d = start_decl ($1, current_declspecs, 0);
1017 decl_attributes (d, $3);
1018 finish_decl (d, NULL_TREE, $2); }
1022 notype_declarator maybeasm maybe_attribute '='
1023 { $<ttype>$ = start_decl ($1, current_declspecs, 1); }
1025 /* Note how the declaration of the variable is in effect while its init is parsed! */
1026 { decl_attributes ($<ttype>5, $3);
1027 finish_decl ($<ttype>5, $6, $2); }
1028 | notype_declarator maybeasm maybe_attribute
1029 { tree d = start_decl ($1, current_declspecs, 0);
1030 decl_attributes (d, $3);
1031 finish_decl (d, NULL_TREE, $2); }
1033 /* the * rules are dummies to accept the Apollo extended syntax
1034 so that the header files compile. */
1038 | ATTRIBUTE '(' '(' attribute_list ')' ')'
1044 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1045 | attribute_list ',' attrib
1046 { $$ = tree_cons (NULL_TREE, $3, $1); }
1051 { if (strcmp (IDENTIFIER_POINTER ($1), "packed"))
1052 warning ("`%s' attribute directive ignored",
1053 IDENTIFIER_POINTER ($1));
1055 | IDENTIFIER '(' IDENTIFIER ')'
1056 { /* If not "mode (m)", then issue warning. */
1057 if (strcmp (IDENTIFIER_POINTER ($1), "mode") != 0)
1059 warning ("`%s' attribute directive ignored",
1060 IDENTIFIER_POINTER ($1));
1064 $$ = tree_cons ($1, $3, NULL_TREE); }
1065 | IDENTIFIER '(' CONSTANT ')'
1066 { /* if not "aligned(n)", then issue warning */
1067 if (strcmp (IDENTIFIER_POINTER ($1), "aligned") != 0
1068 || TREE_CODE ($3) != INTEGER_CST)
1070 warning ("`%s' attribute directive ignored",
1071 IDENTIFIER_POINTER ($1));
1075 $$ = tree_cons ($1, $3, NULL_TREE); }
1076 | IDENTIFIER '(' IDENTIFIER ',' CONSTANT ',' CONSTANT ')'
1077 { /* if not "format(...)", then issue warning */
1078 if (strcmp (IDENTIFIER_POINTER ($1), "format") != 0
1079 || TREE_CODE ($5) != INTEGER_CST
1080 || TREE_CODE ($7) != INTEGER_CST)
1082 warning ("`%s' attribute directive ignored",
1083 IDENTIFIER_POINTER ($1));
1089 tree_cons ($5, $7, NULL_TREE),
1097 { $$ = build_nt (CONSTRUCTOR, NULL_TREE, NULL_TREE);
1099 pedwarn ("ANSI C forbids empty initializer braces"); }
1101 { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); }
1102 | '{' initlist ',' '}'
1103 { $$ = build_nt (CONSTRUCTOR, NULL_TREE, nreverse ($2)); }
1108 /* This chain is built in reverse order,
1109 and put in forward order where initlist is used. */
1112 { $$ = build_tree_list (NULL_TREE, $1); }
1114 { $$ = tree_cons (NULL_TREE, $3, $1); }
1115 /* These are for labeled elements. The syntax for an array element
1116 initializer conflicts with the syntax for an Objective-C message,
1117 so don't include these productions in the Objective-C grammer. */
1119 | '[' expr_no_commas ELLIPSIS expr_no_commas ']' init
1120 { $$ = build_tree_list (tree_cons ($2, NULL_TREE,
1121 build_tree_list ($4, NULL_TREE)),
1123 | initlist ',' '[' expr_no_commas ELLIPSIS expr_no_commas ']' init
1124 { $$ = tree_cons (tree_cons ($4, NULL_TREE,
1125 build_tree_list ($6, NULL_TREE)),
1128 | '[' expr_no_commas ']' init
1129 { $$ = build_tree_list ($2, $4); }
1130 | initlist ',' '[' expr_no_commas ']' init
1131 { $$ = tree_cons ($4, $6, $1); }
1133 | identifier ':' init
1134 { $$ = build_tree_list ($1, $3); }
1135 | initlist ',' identifier ':' init
1136 { $$ = tree_cons ($3, $5, $1); }
1141 { push_c_function_context ();
1142 if (! start_function (current_declspecs, $1, 1))
1144 pop_c_function_context ();
1147 reinit_parse_for_function ();
1148 store_parm_decls (); }
1149 /* This used to use compstmt_or_error.
1150 That caused a bug with input `f(g) int g {}',
1151 where the use of YYERROR1 above caused an error
1152 which then was handled by compstmt_or_error.
1153 There followed a repeated execution of that same rule,
1154 which called YYERROR1 again, and so on. */
1156 { finish_function (1);
1157 pop_c_function_context (); }
1160 notype_nested_function:
1162 { push_c_function_context ();
1163 if (! start_function (current_declspecs, $1, 1))
1165 pop_c_function_context ();
1168 reinit_parse_for_function ();
1169 store_parm_decls (); }
1170 /* This used to use compstmt_or_error.
1171 That caused a bug with input `f(g) int g {}',
1172 where the use of YYERROR1 above caused an error
1173 which then was handled by compstmt_or_error.
1174 There followed a repeated execution of that same rule,
1175 which called YYERROR1 again, and so on. */
1177 { finish_function (1);
1178 pop_c_function_context (); }
1181 /* Any kind of declarator (thus, all declarators allowed
1182 after an explicit typespec). */
1185 after_type_declarator
1189 /* A declarator that is allowed only after an explicit typespec. */
1191 after_type_declarator:
1192 '(' after_type_declarator ')'
1194 | after_type_declarator '(' parmlist_or_identifiers %prec '.'
1195 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1196 /* | after_type_declarator '(' error ')' %prec '.'
1197 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1198 poplevel (0, 0, 0); } */
1199 | after_type_declarator '[' expr ']' %prec '.'
1200 { $$ = build_nt (ARRAY_REF, $1, $3); }
1201 | after_type_declarator '[' ']' %prec '.'
1202 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1203 | '*' type_quals after_type_declarator %prec UNARY
1204 { $$ = make_pointer_declarator ($2, $3); }
1211 /* Kinds of declarator that can appear in a parameter list
1212 in addition to notype_declarator. This is like after_type_declarator
1213 but does not allow a typedef name in parentheses as an identifier
1214 (because it would conflict with a function with that typedef as arg). */
1217 parm_declarator '(' parmlist_or_identifiers %prec '.'
1218 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1219 /* | parm_declarator '(' error ')' %prec '.'
1220 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1221 poplevel (0, 0, 0); } */
1222 | parm_declarator '[' expr ']' %prec '.'
1223 { $$ = build_nt (ARRAY_REF, $1, $3); }
1224 | parm_declarator '[' ']' %prec '.'
1225 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1226 | '*' type_quals parm_declarator %prec UNARY
1227 { $$ = make_pointer_declarator ($2, $3); }
1231 /* A declarator allowed whether or not there has been
1232 an explicit typespec. These cannot redeclare a typedef-name. */
1235 notype_declarator '(' parmlist_or_identifiers %prec '.'
1236 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1237 /* | notype_declarator '(' error ')' %prec '.'
1238 { $$ = build_nt (CALL_EXPR, $1, NULL_TREE, NULL_TREE);
1239 poplevel (0, 0, 0); } */
1240 | '(' notype_declarator ')'
1242 | '*' type_quals notype_declarator %prec UNARY
1243 { $$ = make_pointer_declarator ($2, $3); }
1244 | notype_declarator '[' expr ']' %prec '.'
1245 { $$ = build_nt (ARRAY_REF, $1, $3); }
1246 | notype_declarator '[' ']' %prec '.'
1247 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1252 STRUCT identifier '{'
1253 { $$ = start_struct (RECORD_TYPE, $2);
1254 /* Start scope of tag before parsing components. */
1256 component_decl_list '}'
1257 { $$ = finish_struct ($<ttype>4, $5);
1258 /* Really define the structure. */
1260 | STRUCT '{' component_decl_list '}'
1261 { $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
1264 { $$ = xref_tag (RECORD_TYPE, $2); }
1265 | UNION identifier '{'
1266 { $$ = start_struct (UNION_TYPE, $2); }
1267 component_decl_list '}'
1268 { $$ = finish_struct ($<ttype>4, $5); }
1269 | UNION '{' component_decl_list '}'
1270 { $$ = finish_struct (start_struct (UNION_TYPE, NULL_TREE),
1273 { $$ = xref_tag (UNION_TYPE, $2); }
1274 | ENUM identifier '{'
1275 { $<itype>3 = suspend_momentary ();
1276 $$ = start_enum ($2); }
1277 enumlist maybecomma_warn '}'
1278 { $$ = finish_enum ($<ttype>4, nreverse ($5));
1279 resume_momentary ($<itype>3); }
1281 { $<itype>2 = suspend_momentary ();
1282 $$ = start_enum (NULL_TREE); }
1283 enumlist maybecomma_warn '}'
1284 { $$ = finish_enum ($<ttype>3, nreverse ($4));
1285 resume_momentary ($<itype>2); }
1287 { $$ = xref_tag (ENUMERAL_TYPE, $2); }
1298 { if (pedantic) pedwarn ("comma at end of enumerator list"); }
1301 component_decl_list:
1302 component_decl_list2
1304 | component_decl_list2 component_decl
1305 { $$ = chainon ($1, $2);
1306 pedwarn ("no semicolon at end of struct or union"); }
1309 component_decl_list2: /* empty */
1311 | component_decl_list2 component_decl ';'
1312 { $$ = chainon ($1, $2); }
1313 | component_decl_list2 ';'
1315 pedwarn ("extra semicolon in struct or union specified"); }
1317 /* foo(sizeof(struct{ @defs(ClassName)})); */
1318 | DEFS '(' CLASSNAME ')'
1320 tree interface = lookup_interface ($3);
1323 $$ = get_class_ivars (interface);
1326 error ("Cannot find interface declaration for `%s'",
1327 IDENTIFIER_POINTER ($3));
1334 /* There is a shift-reduce conflict here, because `components' may
1335 start with a `typename'. It happens that shifting (the default resolution)
1336 does the right thing, because it treats the `typename' as part of
1337 a `typed_typespecs'.
1339 It is possible that this same technique would allow the distinction
1340 between `notype_initdecls' and `initdecls' to be eliminated.
1341 But I am being cautious and not trying it. */
1344 typed_typespecs setspecs components
1346 current_declspecs = TREE_VALUE (declspec_stack);
1347 declspec_stack = TREE_CHAIN (declspec_stack);
1348 resume_momentary ($2); }
1351 pedwarn ("ANSI C forbids member declarations with no members");
1354 | nonempty_type_quals setspecs components
1356 current_declspecs = TREE_VALUE (declspec_stack);
1357 declspec_stack = TREE_CHAIN (declspec_stack);
1358 resume_momentary ($2); }
1359 | nonempty_type_quals
1361 pedwarn ("ANSI C forbids member declarations with no members");
1369 component_declarator
1370 | components ',' component_declarator
1371 { $$ = chainon ($1, $3); }
1374 component_declarator:
1375 save_filename save_lineno declarator maybe_attribute
1376 { $$ = grokfield ($1, $2, $3, current_declspecs, NULL_TREE);
1377 decl_attributes ($$, $4); }
1378 | save_filename save_lineno
1379 declarator ':' expr_no_commas maybe_attribute
1380 { $$ = grokfield ($1, $2, $3, current_declspecs, $5);
1381 decl_attributes ($$, $6); }
1382 | save_filename save_lineno ':' expr_no_commas maybe_attribute
1383 { $$ = grokfield ($1, $2, NULL_TREE, current_declspecs, $4);
1384 decl_attributes ($$, $5); }
1387 /* We chain the enumerators in reverse order.
1388 They are put in forward order where enumlist is used.
1389 (The order used to be significant, but no longer is so.
1390 However, we still maintain the order, just to be clean.) */
1394 | enumlist ',' enumerator
1395 { $$ = chainon ($3, $1); }
1401 { $$ = build_enumerator ($1, NULL_TREE); }
1402 | identifier '=' expr_no_commas
1403 { $$ = build_enumerator ($1, $3); }
1407 typed_typespecs absdcl
1408 { $$ = build_tree_list ($1, $2); }
1409 | nonempty_type_quals absdcl
1410 { $$ = build_tree_list ($1, $2); }
1413 absdcl: /* an absolute declarator */
1419 nonempty_type_quals:
1421 { $$ = tree_cons (NULL_TREE, $1, NULL_TREE); }
1422 | nonempty_type_quals TYPE_QUAL
1423 { $$ = tree_cons (NULL_TREE, $2, $1); }
1429 | type_quals TYPE_QUAL
1430 { $$ = tree_cons (NULL_TREE, $2, $1); }
1433 absdcl1: /* a nonempty absolute declarator */
1436 /* `(typedef)1' is `int'. */
1437 | '*' type_quals absdcl1 %prec UNARY
1438 { $$ = make_pointer_declarator ($2, $3); }
1439 | '*' type_quals %prec UNARY
1440 { $$ = make_pointer_declarator ($2, NULL_TREE); }
1441 | absdcl1 '(' parmlist %prec '.'
1442 { $$ = build_nt (CALL_EXPR, $1, $3, NULL_TREE); }
1443 | absdcl1 '[' expr ']' %prec '.'
1444 { $$ = build_nt (ARRAY_REF, $1, $3); }
1445 | absdcl1 '[' ']' %prec '.'
1446 { $$ = build_nt (ARRAY_REF, $1, NULL_TREE); }
1447 | '(' parmlist %prec '.'
1448 { $$ = build_nt (CALL_EXPR, NULL_TREE, $2, NULL_TREE); }
1449 | '[' expr ']' %prec '.'
1450 { $$ = build_nt (ARRAY_REF, NULL_TREE, $2); }
1452 { $$ = build_nt (ARRAY_REF, NULL_TREE, NULL_TREE); }
1455 /* at least one statement, the first of which parses without error. */
1456 /* stmts is used only after decls, so an invalid first statement
1457 is actually regarded as an invalid decl and part of the decls. */
1460 lineno_stmt_or_label
1461 | stmts lineno_stmt_or_label
1473 pushlevel: /* empty */
1474 { emit_line_note (input_filename, lineno);
1478 expand_start_bindings (0);
1480 if (objc_method_context)
1486 /* Read zero or more forward-declarations for labels
1487 that nested functions can jump to. */
1492 pedwarn ("ANSI C forbids label declarations"); }
1497 | label_decls label_decl
1501 LABEL identifiers_or_typenames ';'
1503 for (link = $2; link; link = TREE_CHAIN (link))
1505 tree label = shadow_label (TREE_VALUE (link));
1506 C_DECLARED_LABEL_FLAG (label) = 1;
1507 declare_nonlocal_label (label);
1512 /* This is the body of a function definition.
1513 It causes syntax errors to ignore to the next openbrace. */
1521 { $$ = convert (void_type_node, integer_zero_node); }
1522 | '{' pushlevel maybe_label_decls decls xstmts '}'
1523 { emit_line_note (input_filename, lineno);
1524 expand_end_bindings (getdecls (), 1, 0);
1525 $$ = poplevel (1, 1, 0);
1527 | '{' pushlevel maybe_label_decls error '}'
1528 { emit_line_note (input_filename, lineno);
1529 expand_end_bindings (getdecls (), kept_level_p (), 0);
1530 $$ = poplevel (kept_level_p (), 0, 0);
1532 | '{' pushlevel maybe_label_decls stmts '}'
1533 { emit_line_note (input_filename, lineno);
1534 expand_end_bindings (getdecls (), kept_level_p (), 0);
1535 $$ = poplevel (kept_level_p (), 0, 0);
1539 /* Value is number of statements counted as of the closeparen. */
1541 if_prefix lineno_labeled_stmt
1542 /* Make sure expand_end_cond is run once
1543 for each call to expand_start_cond.
1544 Otherwise a crash is likely. */
1550 { emit_line_note ($<filename>-1, $<lineno>0);
1551 expand_start_cond (truthvalue_conversion ($3), 0);
1552 $<itype>1 = stmt_count;
1553 if_stmt_file = $<filename>-1;
1554 if_stmt_line = $<lineno>0;
1555 position_after_white_space (); }
1558 /* This is a subroutine of stmt.
1559 It is used twice, once for valid DO statements
1560 and once for catching errors in parsing the end test. */
1564 emit_line_note ($<filename>-1, $<lineno>0);
1565 /* See comment in `while' alternative, above. */
1567 expand_start_loop_continue_elsewhere (1);
1568 position_after_white_space (); }
1569 lineno_labeled_stmt WHILE
1570 { expand_loop_continue_here (); }
1574 { $$ = input_filename; }
1581 lineno_labeled_stmt:
1582 save_filename save_lineno stmt
1584 /* | save_filename save_lineno error
1587 | save_filename save_lineno label lineno_labeled_stmt
1591 lineno_stmt_or_label:
1592 save_filename save_lineno stmt_or_label
1600 position_after_white_space ();
1601 next = getc (finput);
1602 ungetc (next, finput);
1603 if (pedantic && next == '}')
1604 pedwarn ("ANSI C forbids label at end of compound statement");
1608 /* Parse a single real statement, not including any labels. */
1615 emit_line_note ($<filename>-1, $<lineno>0);
1616 iterator_expand ($1);
1617 clear_momentary (); }
1619 { expand_start_else ();
1620 $<itype>1 = stmt_count;
1621 position_after_white_space (); }
1623 { expand_end_cond ();
1624 if (extra_warnings && stmt_count == $<itype>1)
1625 warning ("empty body in an else-statement"); }
1626 | simple_if %prec IF
1627 { expand_end_cond ();
1628 if (extra_warnings && stmt_count == $<itype>1)
1629 warning_with_file_and_line (if_stmt_file, if_stmt_line,
1630 "empty body in an if-statement"); }
1631 /* Make sure expand_end_cond is run once
1632 for each call to expand_start_cond.
1633 Otherwise a crash is likely. */
1634 | simple_if ELSE error
1635 { expand_end_cond (); }
1638 emit_line_note ($<filename>-1, $<lineno>0);
1639 /* The emit_nop used to come before emit_line_note,
1640 but that made the nop seem like part of the preceding line.
1641 And that was confusing when the preceding line was
1642 inside of an if statement and was not really executed.
1643 I think it ought to work to put the nop after the line number.
1644 We will see. --rms, July 15, 1991. */
1647 { /* Don't start the loop till we have succeeded
1648 in parsing the end test. This is to make sure
1649 that we end every loop we start. */
1650 expand_start_loop (1);
1651 emit_line_note (input_filename, lineno);
1652 expand_exit_loop_if_false (NULL_PTR,
1653 truthvalue_conversion ($4));
1654 position_after_white_space (); }
1656 { expand_end_loop (); }
1659 { emit_line_note (input_filename, lineno);
1660 expand_exit_loop_if_false (NULL_PTR,
1661 truthvalue_conversion ($3));
1663 clear_momentary (); }
1664 /* This rule is needed to make sure we end every loop we start. */
1665 | do_stmt_start error
1666 { expand_end_loop ();
1667 clear_momentary (); }
1671 emit_line_note ($<filename>-1, $<lineno>0);
1672 /* See comment in `while' alternative, above. */
1674 if ($3) c_expand_expr_stmt ($3);
1675 /* Next step is to call expand_start_loop_continue_elsewhere,
1676 but wait till after we parse the entire for (...).
1677 Otherwise, invalid input might cause us to call that
1678 fn without calling expand_end_loop. */
1681 /* Can't emit now; wait till after expand_start_loop... */
1682 { $<lineno>7 = lineno;
1683 $<filename>$ = input_filename; }
1686 /* Start the loop. Doing this after parsing
1687 all the expressions ensures we will end the loop. */
1688 expand_start_loop_continue_elsewhere (1);
1689 /* Emit the end-test, with a line number. */
1690 emit_line_note ($<filename>8, $<lineno>7);
1692 expand_exit_loop_if_false (NULL_PTR,
1693 truthvalue_conversion ($6));
1694 /* Don't let the tree nodes for $9 be discarded by
1695 clear_momentary during the parsing of the next stmt. */
1697 $<lineno>7 = lineno;
1698 $<filename>8 = input_filename;
1699 position_after_white_space (); }
1701 { /* Emit the increment expression, with a line number. */
1702 emit_line_note ($<filename>8, $<lineno>7);
1703 expand_loop_continue_here ();
1705 c_expand_expr_stmt ($9);
1707 expand_end_loop (); }
1708 | SWITCH '(' expr ')'
1710 emit_line_note ($<filename>-1, $<lineno>0);
1711 c_expand_start_case ($3);
1712 /* Don't let the tree nodes for $3 be discarded by
1713 clear_momentary during the parsing of the next stmt. */
1715 position_after_white_space (); }
1717 { expand_end_case ($3);
1721 emit_line_note ($<filename>-1, $<lineno>0);
1722 if ( ! expand_exit_something ())
1723 error ("break statement not within loop or switch"); }
1726 emit_line_note ($<filename>-1, $<lineno>0);
1727 if (! expand_continue_loop (NULL_PTR))
1728 error ("continue statement not within a loop"); }
1731 emit_line_note ($<filename>-1, $<lineno>0);
1732 c_expand_return (NULL_TREE); }
1735 emit_line_note ($<filename>-1, $<lineno>0);
1736 c_expand_return ($2); }
1737 | ASM_KEYWORD maybe_type_qual '(' expr ')' ';'
1739 emit_line_note ($<filename>-1, $<lineno>0);
1741 if ((TREE_CODE ($4) == ADDR_EXPR
1742 && TREE_CODE (TREE_OPERAND ($4, 0)) == STRING_CST)
1743 || TREE_CODE ($4) == STRING_CST)
1746 error ("argument of `asm' is not a constant string"); }
1747 /* This is the case with just output operands. */
1748 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ')' ';'
1750 emit_line_note ($<filename>-1, $<lineno>0);
1751 c_expand_asm_operands ($4, $6, NULL_TREE, NULL_TREE,
1752 $2 == ridpointers[(int)RID_VOLATILE],
1753 input_filename, lineno); }
1754 /* This is the case with input operands as well. */
1755 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':' asm_operands ')' ';'
1757 emit_line_note ($<filename>-1, $<lineno>0);
1758 c_expand_asm_operands ($4, $6, $8, NULL_TREE,
1759 $2 == ridpointers[(int)RID_VOLATILE],
1760 input_filename, lineno); }
1761 /* This is the case with clobbered registers as well. */
1762 | ASM_KEYWORD maybe_type_qual '(' expr ':' asm_operands ':'
1763 asm_operands ':' asm_clobbers ')' ';'
1765 emit_line_note ($<filename>-1, $<lineno>0);
1766 c_expand_asm_operands ($4, $6, $8, $10,
1767 $2 == ridpointers[(int)RID_VOLATILE],
1768 input_filename, lineno); }
1769 | GOTO identifier ';'
1772 emit_line_note ($<filename>-1, $<lineno>0);
1773 decl = lookup_label ($2);
1776 TREE_USED (decl) = 1;
1782 emit_line_note ($<filename>-1, $<lineno>0);
1783 expand_computed_goto (convert (ptr_type_node, $3)); }
1788 all_iter_stmt_simple
1789 /* | all_iter_stmt_with_decl */
1792 all_iter_stmt_simple:
1795 /* The value returned by this action is */
1796 /* 1 if everything is OK */
1797 /* 0 in case of error or already bound iterator */
1800 if (TREE_CODE ($3) != VAR_DECL)
1801 error ("invalid `for (ITERATOR)' syntax");
1802 if (! ITERATOR_P ($3))
1803 error ("`%s' is not an iterator",
1804 IDENTIFIER_POINTER (DECL_NAME ($3)));
1805 else if (ITERATOR_BOUND_P ($3))
1806 error ("`for (%s)' inside expansion of same iterator",
1807 IDENTIFIER_POINTER (DECL_NAME ($3)));
1811 iterator_for_loop_start ($3);
1817 iterator_for_loop_end ($3);
1820 /* This really should allow any kind of declaration,
1821 for generality. Fix it before turning it back on.
1823 all_iter_stmt_with_decl:
1824 FOR '(' ITERATOR pushlevel setspecs iterator_spec ')'
1826 */ /* The value returned by this action is */
1827 /* 1 if everything is OK */
1828 /* 0 in case of error or already bound iterator */
1830 iterator_for_loop_start ($6);
1834 iterator_for_loop_end ($6);
1835 emit_line_note (input_filename, lineno);
1836 expand_end_bindings (getdecls (), 1, 0);
1837 $<ttype>$ = poplevel (1, 1, 0);
1842 /* Any kind of label, including jump labels and case labels.
1843 ANSI C accepts labels only before statements, but we allow them
1844 also at the end of a compound statement. */
1846 label: CASE expr_no_commas ':'
1847 { register tree value = check_case_value ($2);
1849 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1853 if (value != error_mark_node)
1856 int success = pushcase (value, label, &duplicate);
1858 error ("case label not within a switch statement");
1859 else if (success == 2)
1861 error ("duplicate case value");
1862 error_with_decl (duplicate, "this is the first entry for that value");
1864 else if (success == 3)
1865 warning ("case value out of range");
1866 else if (success == 5)
1867 error ("case label within scope of cleanup or variable array");
1869 position_after_white_space (); }
1870 | CASE expr_no_commas ELLIPSIS expr_no_commas ':'
1871 { register tree value1 = check_case_value ($2);
1872 register tree value2 = check_case_value ($4);
1874 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1878 if (value1 != error_mark_node && value2 != error_mark_node)
1881 int success = pushcase_range (value1, value2, label,
1884 error ("case label not within a switch statement");
1885 else if (success == 2)
1887 error ("duplicate case value");
1888 error_with_decl (duplicate, "this is the first entry for that value");
1890 else if (success == 3)
1891 warning ("case value out of range");
1892 else if (success == 4)
1893 warning ("empty case range");
1894 else if (success == 5)
1895 error ("case label within scope of cleanup or variable array");
1897 position_after_white_space (); }
1902 = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
1903 int success = pushcase (NULL_TREE, label, &duplicate);
1906 error ("default label not within a switch statement");
1907 else if (success == 2)
1909 error ("multiple default labels in one switch");
1910 error_with_decl (duplicate, "this is the first default label");
1912 position_after_white_space (); }
1914 { tree label = define_label (input_filename, lineno, $1);
1918 expand_label (label);
1919 position_after_white_space (); }
1922 /* Either a type-qualifier or nothing. First thing in an `asm' statement. */
1926 { emit_line_note (input_filename, lineno); }
1928 { emit_line_note (input_filename, lineno); }
1937 /* These are the operands other than the first string and colon
1938 in asm ("addextend %2,%1": "=dm" (x), "0" (y), "g" (*x)) */
1939 asm_operands: /* empty */
1941 | nonnull_asm_operands
1944 nonnull_asm_operands:
1946 | nonnull_asm_operands ',' asm_operand
1947 { $$ = chainon ($1, $3); }
1952 { $$ = build_tree_list ($1, $3); }
1957 { $$ = tree_cons (NULL_TREE, combine_strings ($1), NULL_TREE); }
1958 | asm_clobbers ',' string
1959 { $$ = tree_cons (NULL_TREE, combine_strings ($3), $1); }
1962 /* This is what appears inside the parens in a function declarator.
1963 Its value is a list of ..._TYPE nodes. */
1966 clear_parm_order ();
1967 declare_parm_level (0); }
1970 parmlist_tags_warning ();
1971 poplevel (0, 0, 0); }
1979 pedwarn ("ANSI C forbids forward parameter declarations");
1980 /* Mark the forward decls as such. */
1981 for (parm = getdecls (); parm; parm = TREE_CHAIN (parm))
1982 TREE_ASM_WRITTEN (parm) = 1;
1983 clear_parm_order (); }
1987 { $$ = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE); }
1990 /* This is what appears inside the parens in a function declarator.
1991 Is value is represented in the format that grokdeclarator expects. */
1992 parmlist_2: /* empty */
1993 { $$ = get_parm_info (0); }
1995 { $$ = get_parm_info (0);
1997 pedwarn ("ANSI C requires a named argument before `...'");
2000 { $$ = get_parm_info (1); }
2001 | parms ',' ELLIPSIS
2002 { $$ = get_parm_info (0); }
2007 { push_parm_decl ($1); }
2009 { push_parm_decl ($3); }
2012 /* A single parameter declaration or parameter type name,
2013 as found in a parmlist. */
2015 typed_declspecs parm_declarator
2016 { $$ = build_tree_list ($1, $2) ; }
2017 | typed_declspecs notype_declarator
2018 { $$ = build_tree_list ($1, $2) ; }
2019 | typed_declspecs absdcl
2020 { $$ = build_tree_list ($1, $2); }
2021 | declmods notype_declarator
2022 { $$ = build_tree_list ($1, $2) ; }
2024 { $$ = build_tree_list ($1, $2); }
2027 /* This is used in a function definition
2028 where either a parmlist or an identifier list is ok.
2029 Its value is a list of ..._TYPE nodes or a list of identifiers. */
2030 parmlist_or_identifiers:
2032 clear_parm_order ();
2033 declare_parm_level (1); }
2034 parmlist_or_identifiers_1
2036 parmlist_tags_warning ();
2037 poplevel (0, 0, 0); }
2040 parmlist_or_identifiers_1:
2044 for (t = $1; t; t = TREE_CHAIN (t))
2045 if (TREE_VALUE (t) == NULL_TREE)
2046 error ("`...' in old-style identifier list");
2047 $$ = tree_cons (NULL_TREE, NULL_TREE, $1); }
2050 /* A nonempty list of identifiers. */
2053 { $$ = build_tree_list (NULL_TREE, $1); }
2054 | identifiers ',' IDENTIFIER
2055 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2058 /* A nonempty list of identifiers, including typenames. */
2059 identifiers_or_typenames:
2061 { $$ = build_tree_list (NULL_TREE, $1); }
2062 | identifiers_or_typenames ',' identifier
2063 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2067 /* Objective-C productions. */
2077 if (objc_implementation_context)
2079 finish_class (objc_implementation_context);
2080 objc_ivar_chain = NULL_TREE;
2081 objc_implementation_context = NULL_TREE;
2084 warning ("`@end' must appear in an implementation context");
2088 /* A nonempty list of identifiers. */
2091 { $$ = build_tree_list (NULL_TREE, $1); }
2092 | identifier_list ',' identifier
2093 { $$ = chainon ($1, build_tree_list (NULL_TREE, $3)); }
2097 CLASS identifier_list ';'
2099 objc_declare_class ($2);
2103 ALIAS identifier identifier ';'
2105 objc_declare_alias ($2, $3);
2109 INTERFACE identifier protocolrefs '{'
2111 objc_interface_context = objc_ivar_context
2112 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2113 objc_public_flag = 0;
2117 continue_class (objc_interface_context);
2122 finish_class (objc_interface_context);
2123 objc_interface_context = NULL_TREE;
2126 | INTERFACE identifier protocolrefs
2128 objc_interface_context
2129 = start_class (CLASS_INTERFACE_TYPE, $2, NULL_TREE, $3);
2130 continue_class (objc_interface_context);
2135 finish_class (objc_interface_context);
2136 objc_interface_context = NULL_TREE;
2139 | INTERFACE identifier ':' identifier protocolrefs '{'
2141 objc_interface_context = objc_ivar_context
2142 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2143 objc_public_flag = 0;
2147 continue_class (objc_interface_context);
2152 finish_class (objc_interface_context);
2153 objc_interface_context = NULL_TREE;
2156 | INTERFACE identifier ':' identifier protocolrefs
2158 objc_interface_context
2159 = start_class (CLASS_INTERFACE_TYPE, $2, $4, $5);
2160 continue_class (objc_interface_context);
2165 finish_class (objc_interface_context);
2166 objc_interface_context = NULL_TREE;
2169 | IMPLEMENTATION identifier '{'
2171 objc_implementation_context = objc_ivar_context
2172 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2173 objc_public_flag = 0;
2178 = continue_class (objc_implementation_context);
2181 | IMPLEMENTATION identifier
2183 objc_implementation_context
2184 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, NULL_TREE, NULL_TREE);
2186 = continue_class (objc_implementation_context);
2189 | IMPLEMENTATION identifier ':' identifier '{'
2191 objc_implementation_context = objc_ivar_context
2192 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2193 objc_public_flag = 0;
2198 = continue_class (objc_implementation_context);
2201 | IMPLEMENTATION identifier ':' identifier
2203 objc_implementation_context
2204 = start_class (CLASS_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2206 = continue_class (objc_implementation_context);
2209 | INTERFACE identifier '(' identifier ')' protocolrefs
2211 objc_interface_context
2212 = start_class (CATEGORY_INTERFACE_TYPE, $2, $4, $6);
2213 continue_class (objc_interface_context);
2218 finish_class (objc_interface_context);
2219 objc_interface_context = NULL_TREE;
2222 | IMPLEMENTATION identifier '(' identifier ')'
2224 objc_implementation_context
2225 = start_class (CATEGORY_IMPLEMENTATION_TYPE, $2, $4, NULL_TREE);
2227 = continue_class (objc_implementation_context);
2232 PROTOCOL identifier protocolrefs
2234 remember_protocol_qualifiers ();
2235 objc_interface_context
2236 = start_protocol(PROTOCOL_INTERFACE_TYPE, $2, $3);
2240 forget_protocol_qualifiers();
2241 finish_protocol(objc_interface_context);
2242 objc_interface_context = NULL_TREE;
2251 | ARITHCOMPARE identifier_list ARITHCOMPARE
2253 if ($1 == LT_EXPR && $3 == GT_EXPR)
2261 ivar_decl_list visibility_spec ivar_decls
2266 PRIVATE { objc_public_flag = 2; }
2267 | PROTECTED { objc_public_flag = 0; }
2268 | PUBLIC { objc_public_flag = 1; }
2276 | ivar_decls ivar_decl ';'
2280 pedwarn ("extra semicolon in struct or union specified");
2285 /* There is a shift-reduce conflict here, because `components' may
2286 start with a `typename'. It happens that shifting (the default resolution)
2287 does the right thing, because it treats the `typename' as part of
2288 a `typed_typespecs'.
2290 It is possible that this same technique would allow the distinction
2291 between `notype_initdecls' and `initdecls' to be eliminated.
2292 But I am being cautious and not trying it. */
2295 typed_typespecs setspecs ivars
2298 resume_momentary ($2);
2300 | nonempty_type_quals setspecs ivars
2303 resume_momentary ($2);
2313 | ivars ',' ivar_declarator
2319 $$ = add_instance_variable (objc_ivar_context,
2321 $1, current_declspecs,
2324 | declarator ':' expr_no_commas
2326 $$ = add_instance_variable (objc_ivar_context,
2328 $1, current_declspecs, $3);
2330 | ':' expr_no_commas
2332 $$ = add_instance_variable (objc_ivar_context,
2335 current_declspecs, $2);
2342 remember_protocol_qualifiers ();
2343 if (objc_implementation_context)
2344 objc_inherit_code = CLASS_METHOD_DECL;
2346 fatal ("method definition not in class context");
2350 forget_protocol_qualifiers ();
2351 add_class_method (objc_implementation_context, $3);
2352 start_method_def ($3);
2353 objc_method_context = $3;
2357 continue_method_def ();
2361 finish_method_def ();
2362 objc_method_context = NULL_TREE;
2367 remember_protocol_qualifiers ();
2368 if (objc_implementation_context)
2369 objc_inherit_code = INSTANCE_METHOD_DECL;
2371 fatal ("method definition not in class context");
2375 forget_protocol_qualifiers ();
2376 add_instance_method (objc_implementation_context, $3);
2377 start_method_def ($3);
2378 objc_method_context = $3;
2382 continue_method_def ();
2386 finish_method_def ();
2387 objc_method_context = NULL_TREE;
2391 /* the reason for the strange actions in this rule
2392 is so that notype_initdecls when reached via datadef
2393 can find a valid list of type and sc specs in $0. */
2397 | {$<ttype>$ = NULL_TREE; } methodprotolist2
2400 methodprotolist2: /* eliminates a shift/reduce conflict */
2403 | methodprotolist2 methodproto
2404 | methodprotolist2 {$<ttype>$ = NULL_TREE; } datadef
2415 objc_inherit_code = CLASS_METHOD_DECL;
2419 add_class_method (objc_interface_context, $3);
2425 objc_inherit_code = INSTANCE_METHOD_DECL;
2429 add_instance_method (objc_interface_context, $3);
2435 '(' typename ')' unaryselector
2437 $$ = build_method_decl (objc_inherit_code, $2, $4, NULL_TREE);
2442 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, NULL_TREE);
2445 | '(' typename ')' keywordselector optparmlist
2447 $$ = build_method_decl (objc_inherit_code, $2, $4, $5);
2450 | keywordselector optparmlist
2452 $$ = build_method_decl (objc_inherit_code, NULL_TREE, $1, $2);
2456 /* "optarglist" assumes that start_method_def has already been called...
2457 if it is not, the "xdecls" will not be placed in the proper scope */
2464 /* to get around the following situation: "int foo (int a) int b; {}" that
2465 is synthesized when parsing "- a:a b:b; id c; id d; { ... }" */
2480 typed_declspecs setspecs myparms ';'
2481 { resume_momentary ($2); }
2482 | typed_declspecs ';'
2483 { shadow_tag ($1); }
2485 { pedwarn ("empty declaration"); }
2490 { push_parm_decl ($1); }
2491 | myparms ',' myparm
2492 { push_parm_decl ($3); }
2495 /* A single parameter declaration or parameter type name,
2496 as found in a parmlist. DOES NOT ALLOW AN INITIALIZER OR ASMSPEC */
2500 { $$ = build_tree_list (current_declspecs, $1) ; }
2502 { $$ = build_tree_list (current_declspecs, $1) ; }
2504 { $$ = build_tree_list (current_declspecs, $1) ; }
2514 /* oh what a kludge! */
2523 /* returns a tree list node generated by get_parm_info */
2536 | keywordselector keyworddecl
2538 $$ = chainon ($1, $2);
2550 ENUM { $$ = get_identifier (token_buffer); }
2551 | STRUCT { $$ = get_identifier (token_buffer); }
2552 | UNION { $$ = get_identifier (token_buffer); }
2553 | IF { $$ = get_identifier (token_buffer); }
2554 | ELSE { $$ = get_identifier (token_buffer); }
2555 | WHILE { $$ = get_identifier (token_buffer); }
2556 | DO { $$ = get_identifier (token_buffer); }
2557 | FOR { $$ = get_identifier (token_buffer); }
2558 | SWITCH { $$ = get_identifier (token_buffer); }
2559 | CASE { $$ = get_identifier (token_buffer); }
2560 | DEFAULT { $$ = get_identifier (token_buffer); }
2561 | BREAK { $$ = get_identifier (token_buffer); }
2562 | CONTINUE { $$ = get_identifier (token_buffer); }
2563 | RETURN { $$ = get_identifier (token_buffer); }
2564 | GOTO { $$ = get_identifier (token_buffer); }
2565 | ASM_KEYWORD { $$ = get_identifier (token_buffer); }
2566 | SIZEOF { $$ = get_identifier (token_buffer); }
2567 | TYPEOF { $$ = get_identifier (token_buffer); }
2568 | ALIGNOF { $$ = get_identifier (token_buffer); }
2569 | TYPESPEC | TYPE_QUAL
2573 selector ':' '(' typename ')' identifier
2575 $$ = build_keyword_decl ($1, $4, $6);
2578 | selector ':' identifier
2580 $$ = build_keyword_decl ($1, NULL_TREE, $3);
2583 | ':' '(' typename ')' identifier
2585 $$ = build_keyword_decl (NULL_TREE, $3, $5);
2590 $$ = build_keyword_decl (NULL_TREE, NULL_TREE, $2);
2601 | keywordarglist keywordarg
2603 $$ = chainon ($1, $2);
2611 if (TREE_CHAIN ($1) == NULL_TREE)
2612 /* just return the expr., remove a level of indirection */
2613 $$ = TREE_VALUE ($1);
2615 /* we have a comma expr., we will collapse later */
2621 selector ':' keywordexpr
2623 $$ = build_tree_list ($1, $3);
2627 $$ = build_tree_list (NULL_TREE, $2);
2635 $$ = get_class_reference ($1);
2641 { objc_receiver_context = 1; }
2643 { objc_receiver_context = 0; }
2646 $$ = build_tree_list ($3, $5);
2657 | keywordnamelist keywordname
2659 $$ = chainon ($1, $2);
2666 $$ = build_tree_list ($1, NULL_TREE);
2670 $$ = build_tree_list (NULL_TREE, NULL_TREE);
2675 SELECTOR '(' selectorarg ')'
2682 PROTOCOL '(' identifier ')'
2688 /* extension to support C-structures in the archiver */
2691 ENCODE '(' typename ')'
2693 $$ = groktypename ($3);