framework/delibs/decpp/deMeta.hpp

#ifndef _DEMETA_HPP
#define _DEMETA_HPP
/*-------------------------------------------------------------------------
 * drawElements C++ Base Library
 * -----------------------------
 *
 * Copyright 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Metaprogramming tools
 *//*--------------------------------------------------------------------*/

#include "deDefs.hpp"

namespace de
{
namespace meta
{

template <typename T, bool Cond>
struct EnableIf { };

template <typename T>
struct EnableIf<T, true>
{
	typedef T Type;
};

template <bool Cond>
struct Not
{
	enum
	{
		Value = !Cond
	};
};

template <typename A, typename B>
struct TypesSame
{
	enum
	{
		Value = false
	};
};

template <typename A>
struct TypesSame<A, A>
{
	enum
	{
		Value = true
	};
};

} // meta
} // de

#endif // _DEMETA_HPP