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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 ELDBUS_CXX_ELDBUS_INTEGER_SEQUENCE_HH
#define ELDBUS_CXX_ELDBUS_INTEGER_SEQUENCE_HH
namespace efl { namespace eldbus { namespace _detail {
template <typename T, T... Ints>
struct integer_sequence
{
typedef T value_type;
static constexpr std::size_t size() { return sizeof...(Ints); }
typedef integer_sequence<T, Ints...> type;
};
template<class S1, class S2> struct concat;
template<typename T, T... I1, T... I2>
struct concat<integer_sequence<T, I1...>, integer_sequence<T, I2...> >
: integer_sequence<T, I1..., (sizeof...(I1)+I2)...> {};
template<class S1, class S2>
using Concat = typename concat<S1, S2>::type;
template<typename T, T N> struct gen_seq;
template<typename T, T N> using make_integer_sequence = typename gen_seq<T, N>::type;
template<typename T, T N>
struct gen_seq : Concat<make_integer_sequence<T, N/2>
, make_integer_sequence<T, N - N/2>>{};
template<> struct gen_seq<std::size_t, 0> : integer_sequence<std::size_t>{};
template<> struct gen_seq<std::size_t, 1> : integer_sequence<std::size_t, 0>{};
template <std::size_t... I>
using index_sequence = integer_sequence<std::size_t, I...>;
template <std::size_t I>
using make_index_sequence = make_integer_sequence<std::size_t, I>;
} } }
#endif