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Kokkos_Tags.hpp
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Sat, Aug 10, 23:44

Kokkos_Tags.hpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#ifndef KOKKOS_TAGS_HPP
#define KOKKOS_TAGS_HPP
#include <impl/Kokkos_Traits.hpp>
#include <Kokkos_Core_fwd.hpp>
#include <type_traits>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
/** KOKKOS_IMPL_HAS_TYPE( Type )
*
* defines a meta-function that check if a type expose an internal typedef or
* type alias which matches Type
*
* e.g.
* KOKKOS_IMPL_HAS_TYPE( array_layout );
* struct Foo { using array_layout = void; };
* have_array_layout<Foo>::value == 1;
*/
#define KOKKOS_IMPL_HAS_TYPE( TYPE ) \
template <typename T> struct have_ ## TYPE { \
private: \
template <typename U, typename = void > struct X : std::false_type {}; \
template <typename U> struct X<U,typename std::conditional<true,void,typename X:: TYPE >::type > : std::true_type {}; \
public: \
typedef typename X<T>::type type ; \
enum : bool { value = type::value }; \
};
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos { namespace Impl {
template <typename T>
using is_void = std::is_same<void,T>;
}} // namespace Kokkos::Impl
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
#endif

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