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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef __DELEGATE_H
#define __DELEGATE_H
/**
* class DELEGATE
* A trivial delegate (pointer to member method of an object) pattern implementation.
* Check delegate_example.cpp for a coding sample.
*/
template <class ReturnType, class Arg>
class DELEGATE
{
public:
typedef ReturnType (DELEGATE<ReturnType, Arg>::* MemberPointer)( Arg );
typedef ReturnType _ReturnType;
typedef Arg _ArgType;
DELEGATE()
{
}
template <class T>
DELEGATE( T* aObject, ReturnType(T::* aPtr)( Arg ) )
{
m_ptr = reinterpret_cast<MemberPointer>( aPtr );
m_object = reinterpret_cast<void*>( aObject );
};
ReturnType operator()( Arg aA ) const
{
DELEGATE<ReturnType, Arg>* casted = reinterpret_cast<DELEGATE<ReturnType, Arg>*>( m_object );
return (casted->*m_ptr)( aA );
}
private:
MemberPointer m_ptr;
void* m_object;
};
/**
* Class DELEGATE0
* Same as DELEGATE, but with no arguments.
*/
template <class ReturnType>
class DELEGATE0
{
public:
typedef ReturnType ( DELEGATE0<ReturnType>::* MemberPointer )();
typedef ReturnType _ReturnType;
DELEGATE0()
{
}
template <class T>
DELEGATE0( T* aObject, ReturnType(T::* aPtr)() )
{
m_ptr = reinterpret_cast<MemberPointer>( aPtr );
m_object = reinterpret_cast<void*>( aObject );
};
ReturnType operator()() const
{
DELEGATE0<ReturnType>* casted = reinterpret_cast<DELEGATE0<ReturnType>*>( m_object );
return ( casted->*m_ptr )();
}
private:
MemberPointer m_ptr;
void* m_object;
};
#endif
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