mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-29 01:03:45 +00:00
87 lines
3.4 KiB
C++
87 lines
3.4 KiB
C++
/*=============================================================================
|
|
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_CONTAINER_NTH_HPP
|
|
#define SPROUT_CONTAINER_NTH_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/workaround/std/cstddef.hpp>
|
|
#include <sprout/container/traits_fwd.hpp>
|
|
#include <sprout/container/container_traits.hpp>
|
|
#include <sprout/adl/not_found.hpp>
|
|
|
|
namespace sprout_adl {
|
|
sprout::not_found_via_adl range_nth(...);
|
|
} // namespace sprout_adl
|
|
|
|
namespace sprout {
|
|
namespace container_detail {
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
|
|
range_nth(Container& cont, typename sprout::container_traits<Container>::size_type i) {
|
|
return sprout::container_range_traits<Container>::range_nth(cont, i);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
|
|
range_nth(Container const& cont, typename sprout::container_traits<Container const>::size_type i) {
|
|
return sprout::container_range_traits<Container>::range_nth(cont, i);
|
|
}
|
|
} // namespace container_detail
|
|
|
|
//
|
|
// nth
|
|
//
|
|
// effect:
|
|
// ADL callable range_nth(cont, i) -> range_nth(cont, i)
|
|
// otherwise -> sprout::container_range_traits<Container>::range_nth(cont, i)
|
|
// [default]
|
|
// callable cont.nth(i) -> cont.nth(i)
|
|
// otherwise -> *next(begin(cont), i)
|
|
//
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
|
|
nth(Container& cont, typename sprout::container_traits<Container>::size_type i) {
|
|
using sprout::container_detail::range_nth;
|
|
using sprout_adl::range_nth;
|
|
return range_nth(cont, i);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
|
|
nth(Container const& cont, typename sprout::container_traits<Container const>::size_type i) {
|
|
using sprout::container_detail::range_nth;
|
|
using sprout_adl::range_nth;
|
|
return range_nth(cont, i);
|
|
}
|
|
template<typename T, std::size_t N>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<T[N]>::iterator
|
|
nth(T (& arr)[N], typename sprout::container_traits<T[N]>::size_type i) {
|
|
return sprout::container_detail::range_nth(arr, i);
|
|
}
|
|
template<typename T, std::size_t N>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<T const[N]>::iterator
|
|
nth(T const (& arr)[N], typename sprout::container_traits<T const[N]>::size_type i) {
|
|
return sprout::container_detail::range_nth(arr, i);
|
|
}
|
|
|
|
//
|
|
// cnth
|
|
//
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
|
|
cnth(Container const& cont, typename sprout::container_traits<Container const>::size_type i) {
|
|
return sprout::nth(cont, i);
|
|
}
|
|
template<typename T, std::size_t N>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<T const[N]>::iterator
|
|
cnth(T const (& arr)[N], typename sprout::container_traits<T const[N]>::size_type i) {
|
|
return sprout::nth(arr, i);
|
|
}
|
|
} // namespace sprout
|
|
|
|
#include <sprout/container/container_range_traits.hpp>
|
|
|
|
#endif // #ifndef SPROUT_CONTAINER_NTH_HPP
|