sl@0: // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: 
sl@0: #ifndef ISBASEOF_H
sl@0: #define ISBASEOF_H
sl@0: 
sl@0: 
sl@0: // Provisional implementation of a construct that allows to determine
sl@0: // at compile time whether a class type is derived from another class
sl@0: // type
sl@0: 
sl@0: // To be redefined using std::tr1:is_base_of when a TR1 implementation
sl@0: // becomes available for use with Symbian OS.
sl@0: 
sl@0: 
sl@0: // Implementation construct - do not use
sl@0: template<typename B, typename D>
sl@0: class TIsBaseOf
sl@0: 	{
sl@0:   private:
sl@0: 	typedef TUint8 TIsDerived;
sl@0: 
sl@0: 	class TIsNotDerived
sl@0: 		{
sl@0: 		TUint8 iPadding[2];
sl@0: 		};
sl@0: 
sl@0: 
sl@0: 	static TIsDerived ReturnType(B*);
sl@0: 	static TIsNotDerived ReturnType(...);
sl@0: 
sl@0:   public:
sl@0: 
sl@0: 	enum
sl@0: 	{
sl@0: 		EValue = sizeof(ReturnType(static_cast<D*>(0))) == sizeof(TIsDerived) ? 1 : 0
sl@0: 	};
sl@0: 	};
sl@0: 
sl@0: 
sl@0: #define IS_BASE_OF(BaseType, DerivedType) TIsBaseOf<BaseType, DerivedType>::EValue
sl@0: 
sl@0: 
sl@0: #endif //! ISBASEOF_H
sl@0: