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//

// TypeChecks.h

//

// $Id: //poco/1.3/Foundation/include/Poco/MetaProgramming.h#1 $

//

// Library: Foundation

// Package: Core

// Module:  MetaProgramming

//

// Common definitions useful for Meta Template Programming

//

// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.

// and Contributors.

//

// Permission is hereby granted, free of charge, to any person or organization

// obtaining a copy of the software and accompanying documentation covered by

// this license (the "Software") to use, reproduce, display, distribute,

// execute, and transmit the Software, and to prepare derivative works of the

// Software, and to permit third-parties to whom the Software is furnished to

// do so, all subject to the following:

//

// The copyright notices in the Software and this entire statement, including

// the above license grant, this restriction and the following disclaimer,

// must be included in all copies of the Software, in whole or in part, and

// all derivative works of the Software, unless such copies or derivative

// works are solely in the form of machine-executable object code generated by

// a source language processor.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT

// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE

// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,

// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

// DEALINGS IN THE SOFTWARE.

//

#ifndef  Foundation_TypeChecks_INCLUDED

#define  Foundation_TypeChecks_INCLUDED

#include "Poco/Foundation.h"

namespace Poco {

template <typename T>

struct IsReference

        ///Use this struct to determine if a template type is a reference

{

        enum

        {

                VALUE = 0

        };

};

template <typename T>

struct IsReference<T&>

{

        enum

        {

                VALUE = 1

        };

};

template <typename T>

struct IsReference<const T&>

{

        enum

        {

                VALUE = 1

        };

};

template <typename T>

struct IsConst

        ///Use this struct to determine if a template type is a const type

{

        enum

        {

                VALUE = 0

        };

};

template <typename T>

struct IsConst<const T&>

{

        enum

        {

                VALUE = 1

        };

};

template <typename T>

struct IsConst<const T>

{

        enum

        {

                VALUE = 1

        };

};

template <typename T>

struct TypeWrapper

        /// Use the type wrapper if you want to dedecouple constness and references from template types

{

        typedef T TYPE;

        typedef const T CONSTTYPE;

        typedef T& REFTYPE;

        typedef const T& CONSTREFTYPE;

};

template <typename T>

struct TypeWrapper<const T>

{

        typedef T TYPE;

        typedef const T CONSTTYPE;

        typedef T& REFTYPE;

        typedef const T& CONSTREFTYPE;

};

template <typename T>

struct TypeWrapper<const T&>

{

        typedef T TYPE;

        typedef const T CONSTTYPE;

        typedef T& REFTYPE;

        typedef const T& CONSTREFTYPE;

};

template <typename T>

struct TypeWrapper<T&>

{

        typedef T TYPE;

        typedef const T CONSTTYPE;

        typedef T& REFTYPE;

        typedef const T& CONSTREFTYPE;

};

} // namespace Poco

#endif