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Sprout/sprout/index_tuple/integer_sequence.hpp
2017-07-29 14:20:01 +09:00

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1.4 KiB
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/*=============================================================================
Copyright (c) 2011-2017 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_INDEX_TUPLE_INTEGER_SEQUENCE_HPP
#define SPROUT_INDEX_TUPLE_INTEGER_SEQUENCE_HPP
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
namespace sprout {
//
// integer_sequence
//
template<typename T, T... Is>
struct integer_sequence {
public:
typedef integer_sequence type;
template<T... J>
struct rebind
: public integer_sequence<T, J...>
{};
public:
static SPROUT_CONSTEXPR type make() SPROUT_NOEXCEPT {
return type();
}
public:
typedef T value_type;
template<typename Seq>
struct transfer
: public Seq::template rebind<Is...>
{};
public:
SPROUT_STATIC_CONSTEXPR std::size_t static_size = sizeof...(Is);
public:
static SPROUT_CONSTEXPR size_t size() SPROUT_NOEXCEPT {
return static_size;
}
};
template<typename T, T... Is>
SPROUT_CONSTEXPR_OR_CONST std::size_t sprout::integer_sequence<T, Is...>::static_size;
} // namespace sprout
#endif // #ifndef SPROUT_INDEX_TUPLE_INTEGER_SEQUENCE_HPP