itkEnableIf.h

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/*=========================================================================
*
*  Copyright Insight Software Consortium
*
*  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.txt
*
*  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.
*
*=========================================================================*/
#ifndef itkEnableIf_h
#define itkEnableIf_h

namespace itk
{
namespace mpl
{

template <bool V, typename TType = void> struct EnableIfC {};
template <typename TType> struct EnableIfC<true, TType> { typedef TType Type; };


template <bool V, typename TType = void> struct DisableIfC {};
template <typename TType> struct DisableIfC<false, TType> { typedef TType Type; };

template <class TCondition, class TType = void>
struct EnableIf : public EnableIfC<TCondition::Value, TType> {};

template <class TCondition, class TType = void>
struct DisableIf : public DisableIfC<TCondition::Value, TType> {};

} // namespace itk::mpl

// itk::EnableIf(C), DisableIf(C) have move to itk::mpl
// Expect them to be deprecated.
using mpl::EnableIf;
using mpl::DisableIf;
using mpl::EnableIfC;
using mpl::DisableIfC;

} // namespace itk

#endif // itkEnableIf_h