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/*
* Copyright 2019 by its authors. See AUTHORS.
*
* 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.
*/
#ifndef EFL_EINA_EINA_ALIGNED_UNION_HH_
#define EFL_EINA_EINA_ALIGNED_UNION_HH_
namespace efl { namespace eina { namespace _mpl {
template <std::size_t...Numbers>
struct max;
template <std::size_t A0>
struct max<A0> : std::integral_constant<std::size_t, A0> {};
template <std::size_t A0, std::size_t A1, std::size_t...Args>
struct max<A0, A1, Args...> : max<(A0 > A1 ? A0 : A1), Args...> {};
}
// Workaround needed for GCC before 5.1
template <std::size_t Min, typename...Args>
struct aligned_union
{
static constexpr std::size_t alignment_value = _mpl::max<alignof(Args)...>::value;
typedef typename std::aligned_storage
< _mpl::max<Min, sizeof(Args)...>::value
, alignment_value >::type type;
};
} }
#endif