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-rw-r--r--gcc-4.7/libobjc/nil_method.c56
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diff --git a/gcc-4.7/libobjc/nil_method.c b/gcc-4.7/libobjc/nil_method.c
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-/* GNU Objective C Runtime nil receiver function
- Copyright (C) 1993, 1995, 1996, 2002, 2009, 2010
- Free Software Foundation, Inc.
- Contributed by Kresten Krab Thorup
-
-This file is part of GCC.
-
-GCC is free software; you can redistribute it and/or modify it under the
-terms of the GNU General Public License as published by the Free Software
-Foundation; either version 3, or (at your option) any later version.
-
-GCC is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
-details.
-
-Under Section 7 of GPL version 3, you are granted additional
-permissions described in the GCC Runtime Library Exception, version
-3.1, as published by the Free Software Foundation.
-
-You should have received a copy of the GNU General Public License and
-a copy of the GCC Runtime Library Exception along with this program;
-see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
-<http://www.gnu.org/licenses/>. */
-
-
-/* This is the nil method, the function that is called when the receiver
- of a method is nil */
-
-#include "objc-private/common.h"
-#include "objc/objc.h"
-
-/* When the receiver of a method invocation is nil, the runtime
- returns nil_method() as the method implementation. This function
- will be casted to whatever function was supposed to be executed to
- execute that method (that function will take an id, followed by a
- SEL, followed by who knows what arguments, depends on the method),
- and executed.
-
- For this reason, nil_method() should be a function which can be
- called in place of any function taking an 'id' argument followed by
- a 'SEL' argument, followed by zero, or one, or any number of
- arguments (both a fixed number, or a variable number !).
-
- There is no "proper" implementation of such a nil_method function
- in C, however in all existing implementations it does not matter
- when extra arguments are present, so we can simply create a function
- taking a receiver and a selector, and all other arguments will be
- ignored. :-)
-*/
-
-id
-nil_method (id receiver, SEL op __attribute__ ((__unused__)))
-{
- return receiver;
-}