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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 itkIsBaseOf_h
#define itkIsBaseOf_h
#include "itkIsConvertible.h"
#include "itkIsSame.h"
namespace itk {
/// \cond HIDE_META_PROGRAMMING
namespace mpl {
/** Traits that emulates \c std::is_base_of<>.
* \tparam TBase base type
* \tparam TDerived derived type
* \return (in \c Value) whether \c TDerived inherits (publicly) from \c TBase
* (directly, or indirectly)
* \author The definition provided follows the code snippet available in Andrei
* Alexandrescu's <em>Modern C++ Design</em>.
* \ingroup MetaProgrammingLibrary
* \ingroup ITKCommon
*/
template <typename TBase, typename TDerived>
struct IsBaseOf
{
static ITK_CONSTEXPR_VAR bool Value
= IsConvertible<const TDerived*, const TBase*>::Value
&& ! IsSame<const TBase*, const void*>::Value;
};
} // itk::mpl namespace
/// \endcond
} // itk namespace
#endif // itkIsBaseOf_h
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