48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/*
|
|
* 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
|