iterator_traits.hpp

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/*
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#ifndef LIBPMEMOBJ_CPP_ITERATOR_TRAITS_HPP
#define LIBPMEMOBJ_CPP_ITERATOR_TRAITS_HPP

#include <iterator>

namespace pmem
{

namespace detail
{

template <typename T, typename U, typename C = void>
struct has_iterator_category_convertible_to : std::false_type {
};

template <typename T, typename U>
struct has_iterator_category_convertible_to<
    T, U,
    typename std::enable_if<std::is_convertible<
        typename std::iterator_traits<T>::iterator_category,
        U>::value>::type> : std::true_type {
};

template <typename T>
struct is_output_iterator
    : public has_iterator_category_convertible_to<T, std::output_iterator_tag> {
};

template <typename T>
struct is_input_iterator
    : public has_iterator_category_convertible_to<T, std::input_iterator_tag> {
};

template <typename T>
struct is_forward_iterator
    : public has_iterator_category_convertible_to<T,
                          std::forward_iterator_tag> {
};

template <typename T>
struct is_bidirectional_iterator : public has_iterator_category_convertible_to<
                       T, std::bidirectional_iterator_tag> {
};

template <typename T>
struct is_random_access_iterator : public has_iterator_category_convertible_to<
                       T, std::random_access_iterator_tag> {
};

} /* namespace detail */

} /* namespace pmem */

#endif /* LIBPMEMOBJ_CPP_ITERATOR_TRAITS_HPP */