diff options
Diffstat (limited to 'libcxx/include/__iterator/iterator_traits.h')
| -rw-r--r-- | libcxx/include/__iterator/iterator_traits.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libcxx/include/__iterator/iterator_traits.h b/libcxx/include/__iterator/iterator_traits.h index c3a5b7e0dd22..63525e230add 100644 --- a/libcxx/include/__iterator/iterator_traits.h +++ b/libcxx/include/__iterator/iterator_traits.h @@ -475,6 +475,18 @@ struct __is_exactly_cpp17_input_iterator __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; +template <class _Tp> +struct __is_exactly_cpp17_forward_iterator + : public integral_constant<bool, + __has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value && + !__has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag>::value> {}; + +template <class _Tp> +struct __is_exactly_cpp17_bidirectional_iterator + : public integral_constant<bool, + __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag>::value && + !__has_iterator_category_convertible_to<_Tp, random_access_iterator_tag>::value> {}; + template<class _InputIterator> using __iter_value_type = typename iterator_traits<_InputIterator>::value_type; |