mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-25 00:43:44 +00:00
76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2015 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_STD_UTILITY_HPP
|
|
#define SPROUT_TUPLE_STD_UTILITY_HPP
|
|
|
|
#include <type_traits>
|
|
#include <array>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/workaround/std/cstddef.hpp>
|
|
#include <sprout/utility/move.hpp>
|
|
#include <sprout/tuple/tuple.hpp>
|
|
|
|
namespace sprout {
|
|
namespace tuples {
|
|
namespace detail {
|
|
template<std::size_t I, typename T>
|
|
struct get_impl;
|
|
template<typename T1, typename T2>
|
|
struct get_impl<0, std::pair<T1, T2> > {
|
|
public:
|
|
SPROUT_CONSTEXPR T1& operator()(std::pair<T1, T2>& t) const {
|
|
return t.first;
|
|
}
|
|
SPROUT_CONSTEXPR T1 const& operator()(std::pair<T1, T2> const& t) const {
|
|
return t.first;
|
|
}
|
|
};
|
|
template<typename T1, typename T2>
|
|
struct get_impl<1, std::pair<T1, T2> > {
|
|
public:
|
|
SPROUT_CONSTEXPR T2& operator()(std::pair<T1, T2>& t) const {
|
|
return t.second;
|
|
}
|
|
SPROUT_CONSTEXPR T2 const& operator()(std::pair<T1, T2> const& t) const {
|
|
return t.second;
|
|
}
|
|
};
|
|
} // namespace detail
|
|
} // namespace tuples
|
|
} // namespace sprout
|
|
|
|
namespace sprout {
|
|
namespace tuples {
|
|
//
|
|
// tuple_access_traits
|
|
//
|
|
template<typename T1, typename T2>
|
|
struct tuple_access_traits<std::pair<T1, T2> > {
|
|
public:
|
|
template<std::size_t I>
|
|
static SPROUT_CONSTEXPR typename sprout::tuples::tuple_element<I, std::pair<T1, T2> >::type&
|
|
tuple_get(std::pair<T1, T2>& t) SPROUT_NOEXCEPT {
|
|
static_assert(I < 2, "tuple_get: index out of range");
|
|
return sprout::tuples::detail::get_impl<I, std::pair<T1, T2> >()(t);
|
|
}
|
|
template<std::size_t I>
|
|
static SPROUT_CONSTEXPR typename sprout::tuples::tuple_element<I, std::pair<T1, T2> >::type const&
|
|
tuple_get(std::pair<T1, T2> const& t) SPROUT_NOEXCEPT {
|
|
static_assert(I < 2, "tuple_get: index out of range");
|
|
return sprout::tuples::detail::get_impl<I, std::pair<T1, T2> >()(t);
|
|
}
|
|
template<std::size_t I>
|
|
static SPROUT_CONSTEXPR typename sprout::tuples::tuple_element<I, std::pair<T1, T2> >::type&&
|
|
tuple_get(std::pair<T1, T2>&& t) SPROUT_NOEXCEPT {
|
|
return sprout::move(tuple_get<I>(t));
|
|
}
|
|
};
|
|
} // namespace tuples
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_TUPLE_STD_UTILITY_HPP
|