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Sprout/sprout/tuple/operation/pop_front.hpp
2016-02-25 18:48:28 +09:00

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1.7 KiB
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/*=============================================================================
Copyright (c) 2011-2016 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_TUPLE_OPERATION_POP_FRONT_HPP
#define SPROUT_TUPLE_OPERATION_POP_FRONT_HPP
#include <sprout/config.hpp>
#include <sprout/index_tuple/metafunction.hpp>
#include <sprout/tuple/tuple.hpp>
#include <sprout/tuple/functions.hpp>
#include <sprout/type/operation/pop_front.hpp>
namespace sprout {
namespace tuples {
namespace results {
//
// pop_front
//
template<typename Tuple>
struct pop_front
: public sprout::types::pop_front<Tuple>
{};
} // namespace results
namespace detail {
template<typename Result, typename Tuple, sprout::index_t... Indexes>
inline SPROUT_CONSTEXPR Result
pop_front_impl(Tuple const& t, sprout::index_tuple<Indexes...>) {
return sprout::tuples::remake<Result>(
t,
sprout::tuples::get<Indexes>(t)...
);
}
} // namespace detail
//
// pop_front
//
template<typename Tuple>
inline SPROUT_CONSTEXPR typename sprout::tuples::results::pop_front<Tuple>::type
pop_front(Tuple const& t) {
return sprout::tuples::detail::pop_front_impl<typename sprout::tuples::results::pop_front<Tuple>::type>(
t,
sprout::index_range<1, sprout::tuples::tuple_size<Tuple>::value>::make()
);
}
} // namespace tuples
} // namespace sprout
#endif // #ifndef SPROUT_TUPLE_OPERATION_POP_FRONT_HPP