20namespace seqan3::detail
40template <
typename underlying_iterator_t>
41struct maybe_iterator_category
43#if SEQAN3_DOXYGEN_ONLY(1)0
50 using iterator_category = MAYBE_PRESENT(std::iterator_traits<underlying_iterator_t>::iterator_category);
56SEQAN3_CONCEPT has_iterator_category =
requires ()
58 typename t::iterator_category;
62#if SEQAN3_WORKAROUND_GCC_96070
66template <
typename underlying_iterator_t>
67 requires (!has_iterator_category<std::iterator_traits<underlying_iterator_t>>)
68struct maybe_iterator_category<underlying_iterator_t>
70 using iterator_category = void;
75template <
typename underlying_iterator_t>
76 requires has_iterator_category<std::iterator_traits<underlying_iterator_t>>
77struct maybe_iterator_category<underlying_iterator_t>
93template <
typename underling_iterator_t>
94struct maybe_inherited_iterator_category :
public maybe_iterator_category<underling_iterator_t>
98template <
typename underling_iterator_t>
99 requires has_iterator_category<underling_iterator_t>
100struct maybe_inherited_iterator_category<underling_iterator_t>
112template <
typename it_t>
114 requires std::input_or_output_iterator<it_t>
116using iterator_concept_tag_t =
118 std::contiguous_iterator<it_t>,
119 std::contiguous_iterator_tag,
121 std::random_access_iterator<it_t>,
124 std::bidirectional_iterator<it_t>,
127 std::forward_iterator<it_t>,
130 std::input_iterator<it_t>,
136namespace seqan3::detail
152template <
typename it_t>
160template <
typename it_t>
162struct iter_pointer<it_t>
175template <
typename it_t>
176using iter_pointer_t =
typename iter_pointer<it_t>::type;
The <iterator> header from C++20's standard library.