101 lines
2.6 KiB
C++
101 lines
2.6 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2013 CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef __DELEGATE_H
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#define __DELEGATE_H
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/**
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* class DELEGATE
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* A trivial delegate (pointer to member method of an object) pattern implementation.
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* Check delegate_example.cpp for a coding sample.
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*/
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template <class ReturnType, class Arg>
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class DELEGATE
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{
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public:
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typedef ReturnType (DELEGATE<ReturnType, Arg>::* MemberPointer)( Arg );
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typedef ReturnType _ReturnType;
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typedef Arg _ArgType;
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DELEGATE()
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{
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}
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template <class T>
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DELEGATE( T* aObject, ReturnType(T::* aPtr)( Arg ) )
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{
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m_ptr = reinterpret_cast<MemberPointer>( aPtr );
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m_object = reinterpret_cast<void*>( aObject );
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};
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ReturnType operator()( Arg aA ) const
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{
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DELEGATE<ReturnType, Arg>* casted = reinterpret_cast<DELEGATE<ReturnType, Arg>*>( m_object );
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return (casted->*m_ptr)( aA );
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}
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private:
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MemberPointer m_ptr;
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void* m_object;
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};
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/**
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* Class DELEGATE0
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* Same as DELEGATE, but with no arguments.
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*/
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template <class ReturnType>
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class DELEGATE0
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{
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public:
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typedef ReturnType ( DELEGATE0<ReturnType>::* MemberPointer )();
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typedef ReturnType _ReturnType;
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DELEGATE0()
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{
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}
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template <class T>
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DELEGATE0( T* aObject, ReturnType(T::* aPtr)() )
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{
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m_ptr = reinterpret_cast<MemberPointer>( aPtr );
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m_object = reinterpret_cast<void*>( aObject );
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};
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ReturnType operator()() const
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{
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DELEGATE0<ReturnType>* casted = reinterpret_cast<DELEGATE0<ReturnType>*>( m_object );
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return ( casted->*m_ptr )();
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}
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private:
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MemberPointer m_ptr;
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void* m_object;
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};
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#endif
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