mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
76 lines
3.3 KiB
C++
76 lines
3.3 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_AT_HPP
|
|
#define SPROUT_CONTAINER_AT_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/workaround/std/cstddef.hpp>
|
|
#include <sprout/container/traits_fwd.hpp>
|
|
#include <sprout/container/container_traits.hpp>
|
|
|
|
namespace sprout {
|
|
//
|
|
// at
|
|
//
|
|
// effect:
|
|
// sprout::container_range_traits<Container>::range_at(cont, i)
|
|
// [default]
|
|
// ADL callable range_at(cont, i) -> range_at(cont, i)
|
|
// [default]
|
|
// Container is T[N] -> cont[sprout::range_index_check(cont, i)]
|
|
// otherwise, Container is not const
|
|
// && sprout::is_const_cast_convertible<const_reference, reference>
|
|
// && (callable sprout::as_const(cont).at(i)
|
|
// || callable sprout::as_const(cont)[i]
|
|
// || callable sprout::as_const(cont).begin()
|
|
// || ADL(without sprout) callable begin(sprout::as_const(cont))
|
|
// )
|
|
// -> const_cast<reference>(sprout::at(sprout::as_const(cont), i))
|
|
// otherwise, callable cont.at(i) -> cont.at(i)
|
|
// otherwise, callable cont[i] -> cont[sprout::range_index_check(cont, i)]
|
|
// otherwise -> *sprout::next(sprout::begin(cont), sprout::range_index_check(cont, i))
|
|
//
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::reference
|
|
at(Container& cont, typename sprout::container_traits<Container>::size_type i) {
|
|
return sprout::container_range_traits<Container>::range_at(cont, i);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::reference
|
|
at(Container const& cont, typename sprout::container_traits<Container const>::size_type i) {
|
|
return sprout::container_range_traits<Container const>::range_at(cont, i);
|
|
}
|
|
template<typename T, std::size_t N>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<T[N]>::reference
|
|
at(T (& arr)[N], typename sprout::container_traits<T[N]>::size_type i) {
|
|
return sprout::container_range_traits<T[N]>::range_at(arr, i);
|
|
}
|
|
template<typename T, std::size_t N>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<T const[N]>::reference
|
|
at(T const (& arr)[N], typename sprout::container_traits<T const[N]>::size_type i) {
|
|
return sprout::container_range_traits<T const[N]>::range_at(arr, i);
|
|
}
|
|
|
|
//
|
|
// cat
|
|
//
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::reference
|
|
cat(Container const& cont, typename sprout::container_traits<Container const>::size_type i) {
|
|
return sprout::at(cont, i);
|
|
}
|
|
template<typename T, std::size_t N>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<T const[N]>::reference
|
|
cat(T const (& arr)[N], typename sprout::container_traits<T const[N]>::size_type i) {
|
|
return sprout::at(arr, i);
|
|
}
|
|
} // namespace sprout
|
|
|
|
#include <sprout/container/container_range_traits.hpp>
|
|
|
|
#endif // #ifndef SPROUT_CONTAINER_AT_HPP
|