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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_FOLD_HH_
#define EFL_EINA_FOLD_HH_
#include <eina_tuple.hh>
namespace efl { namespace eina {
namespace _mpl {
template <typename T, typename F, typename A0, bool B = std::is_same<T, std::tuple<> >::value>
struct fold_impl
{
typedef typename F::template apply<A0, typename std::tuple_element<0, T>::type>::type result;
typedef typename fold_impl<typename _mpl::pop_front<T>::type
, F, result
>::type
type;
};
template <typename T, typename F, typename A0>
struct fold_impl<T, F, A0, true>
{
typedef A0 type;
};
template <typename T, typename F, typename A0>
struct fold : fold_impl<T, F, A0>
{};
} } }
#endif