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Sprout/sprout/iterator/iterator_traits.hpp
2018-12-30 17:25:21 +09:00

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/*=============================================================================
Copyright (c) 2011-2018 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_ITERATOR_ITERATOR_TRAITS_HPP
#define SPROUT_ITERATOR_ITERATOR_TRAITS_HPP
#include <iterator>
#include <sprout/config.hpp>
#include <sprout/utility/pack.hpp>
#include <sprout/detail/nil_base.hpp>
namespace sprout {
//
// iterator_traits
//
namespace detail {
template<typename Iterator, typename = void>
struct iterator_traits_impl
: public sprout::detail::nil_base
{};
template<typename Iterator>
struct iterator_traits_impl<
Iterator,
typename sprout::head_element<
void,
typename Iterator::difference_type,
typename Iterator::value_type,
typename Iterator::pointer,
typename Iterator::reference,
typename Iterator::iterator_category
>::type
>
: public std::iterator_traits<Iterator>
{};
} // namespace detail
template<typename Iterator>
struct iterator_traits
: public sprout::detail::iterator_traits_impl<Iterator>
{};
template<typename T>
struct iterator_traits<T*>
: public std::iterator_traits<T*>
{};
} // namespace sprout
#endif // #ifndef SPROUT_ITERATOR_ITERATOR_TRAITS_HPP