20namespace seqan3::detail
39template <
typename file_type>
42 static_assert(!std::is_const_v<file_type>,
43 "You cannot iterate over const files, because the iterator changes the file.");
52 using value_type =
typename file_type::value_type;
54 using reference =
typename file_type::reference;
56 using const_reference =
typename file_type::reference;
58 using size_type =
typename file_type::size_type;
60 using difference_type =
typename file_type::difference_type;
62 using pointer =
typename file_type::value_type *;
71 constexpr in_file_iterator() =
default;
73 constexpr in_file_iterator(in_file_iterator
const &) =
default;
75 constexpr in_file_iterator & operator=(in_file_iterator
const &) =
default;
77 constexpr in_file_iterator(in_file_iterator &&) =
default;
79 constexpr in_file_iterator & operator=(in_file_iterator &&) =
default;
81 ~in_file_iterator() =
default;
84 constexpr in_file_iterator(file_type & _host) noexcept : host{&_host}
92 in_file_iterator & operator++()
94 assert(host !=
nullptr);
95 host->read_next_record();
102 assert(host !=
nullptr);
107 reference operator*() noexcept
109 assert(host !=
nullptr);
110 return host->record_buffer;
114 reference operator*() const noexcept
116 assert(host !=
nullptr);
117 return host->record_buffer;
127 constexpr bool operator==(std::default_sentinel_t
const &)
const noexcept
129 assert(host !=
nullptr);
134 constexpr bool operator!=(std::default_sentinel_t
const &)
const noexcept
136 assert(host !=
nullptr);
137 return !host->at_end;
141 constexpr friend bool operator==(std::default_sentinel_t
const &, in_file_iterator
const & it)
noexcept
143 return (it == std::default_sentinel);
147 constexpr friend bool operator!=(std::default_sentinel_t
const &, in_file_iterator
const & it)
noexcept
149 return (it != std::default_sentinel);
161 assert(host !=
nullptr);
162 return host->position_buffer;
168 assert(host !=
nullptr);
169 host->secondary_stream->seekg(pos);
170 if (host->secondary_stream->fail())
174 host->at_end =
false;
175 host->read_next_record();