17 #include <type_traits>
22 namespace seqan3::detail
48 template <
typename derived_t, std::input_or_output_iterator base_t>
49 class inherited_iterator_base :
50 public std::conditional_t<std::is_pointer_v<base_t> || !std::semiregular<base_t>, empty_type, base_t>,
51 public maybe_inherited_iterator_category<base_t>
55 static constexpr
bool wrap_base = std::is_pointer_v<base_t> || !std::semiregular<base_t>;
64 using difference_type = std::iter_difference_t<base_t>;
66 using value_type = std::iter_value_t<base_t>;
68 using reference = std::iter_reference_t<base_t>;
70 using pointer = detail::iter_pointer_t<base_t>;
71 #if SEQAN3_DOXYGEN_ONLY(1) 0
73 using iterator_category = maybe_present;
76 using iterator_concept = detail::iterator_concept_tag_t<base_t>;
83 constexpr inherited_iterator_base() noexcept(
std::is_nothrow_default_constructible_v<base_t>) =
85 constexpr inherited_iterator_base(inherited_iterator_base const & rhs) noexcept(
86 std::is_nothrow_copy_constructible_v<base_t>) = default;
87 constexpr inherited_iterator_base(inherited_iterator_base && rhs) noexcept(
88 std::is_nothrow_move_constructible_v<base_t>) = default;
89 constexpr inherited_iterator_base & operator=(inherited_iterator_base const & rhs) noexcept(
90 std::is_nothrow_copy_assignable_v<base_t>) = default;
91 constexpr inherited_iterator_base & operator=(inherited_iterator_base && rhs) noexcept(
92 std::is_nothrow_move_assignable_v<base_t>) = default;
93 ~inherited_iterator_base() noexcept(
std::is_nothrow_destructible_v<base_t>) = default;
96 constexpr inherited_iterator_base(base_t it) noexcept(
std::is_nothrow_move_constructible_v<base_t>)
98 : base_t{std::move(it)}
102 constexpr inherited_iterator_base(base_t it) noexcept
104 : member{std::move(it)}
109 constexpr base_t
const & base() const & noexcept
115 constexpr base_t & base() & noexcept
121 constexpr base_t base() && noexcept
123 return std::move(as_base());
132 constexpr
bool operator==(derived_t
const & rhs)
const
133 noexcept(noexcept(std::declval<base_t &>() == std::declval<base_t &>()))
136 return base() == rhs.base();
140 constexpr
bool operator!=(derived_t
const & rhs)
const
141 noexcept(noexcept(std::declval<base_t &>() == std::declval<base_t &>()))
144 return !(*
this == rhs);
148 constexpr
bool operator<(derived_t
const & rhs)
const
149 noexcept(noexcept(std::declval<base_t &>() < std::declval<base_t &>()))
152 return base() < rhs.base();
156 constexpr
bool operator>(derived_t
const & rhs)
const
157 noexcept(noexcept(std::declval<base_t &>() > std::declval<base_t &>()))
160 return base() > rhs.base();
164 constexpr
bool operator<=(derived_t
const & rhs)
const
165 noexcept(noexcept(std::declval<base_t &>() > std::declval<base_t &>()))
168 return !(*
this > rhs);
172 constexpr
bool operator>=(derived_t
const & rhs)
const
173 noexcept(noexcept(std::declval<base_t &>() < std::declval<base_t &>()))
176 return !(*
this < rhs);
186 template <
typename base_t_ = base_t>
188 constexpr derived_t & operator++() noexcept(noexcept(++
std::declval<base_t &>()))
192 return *this_derived();
197 template <
typename base_t_ = base_t>
199 constexpr
auto operator++(
int) noexcept(noexcept(std::declval<base_t &>()++))
202 requires !std::same_as<decltype(i++), base_t_>;
210 template <
typename base_t_ = base_t>
213 operator++(
int) noexcept(noexcept(std::declval<base_t &>()++) && noexcept(derived_t(std::declval<base_t &>())))
218 } -> std::same_as<base_t_>;
219 } && std::constructible_from<derived_t, base_t_>
221 return derived_t{as_base()++};
226 template <
typename base_t_ = base_t>
228 constexpr derived_t & operator--() noexcept(noexcept(--
std::declval<base_t &>()))
232 return *this_derived();
237 template <
typename base_t_ = base_t>
240 operator--(
int) noexcept(noexcept(std::declval<base_t &>()--) && noexcept(derived_t{std::declval<base_t &>()}))
241 requires requires (base_t_ i) { i--; } && std::constructible_from<derived_t, base_t_>
243 return derived_t{as_base()--};
248 template <
typename base_t_ = base_t>
250 constexpr derived_t & operator+=(difference_type
const skip) noexcept(noexcept(std::declval<base_t &>() += skip))
254 return *this_derived();
259 template <
typename base_t_ = base_t>
261 constexpr derived_t operator+(difference_type
const skip)
const
262 noexcept(noexcept(std::declval<base_t &>() + skip) && noexcept(derived_t{std::declval<base_t &>()}))
264 && std::constructible_from<derived_t, base_t_>
266 return derived_t{as_base() + skip};
270 constexpr
friend derived_t operator+(difference_type
const skip,
271 derived_t
const & it) noexcept(noexcept(skip + std::declval<base_t const &>()))
273 && std::constructible_from<derived_t, base_t>
280 template <
typename base_t_ = base_t>
282 constexpr derived_t & operator-=(difference_type
const skip) noexcept(noexcept(std::declval<base_t &>() -= skip))
286 return *this_derived();
291 template <
typename base_t_ = base_t>
293 constexpr derived_t operator-(difference_type
const skip)
const
294 noexcept(noexcept(std::declval<base_t const &>() - skip) && noexcept(derived_t(std::declval<base_t &>())))
295 requires requires (base_t_ i, difference_type const n) { i - n; } && std::constructible_from<derived_t, base_t_>
297 return derived_t{as_base() - skip};
301 constexpr difference_type operator-(derived_t
const & rhs)
const
302 noexcept(noexcept(std::declval<base_t &>() - std::declval<base_t &>()))
305 return as_base() - rhs.as_base();
313 constexpr reference operator*() noexcept(noexcept(*
std::declval<base_t &>()))
320 constexpr decltype(
auto) operator*() const noexcept(noexcept(*
std::declval<base_t const &>()))
327 constexpr pointer operator->() noexcept(noexcept(*
std::declval<base_t &>()))
334 constexpr decltype(
auto) operator->() const noexcept(noexcept(*
std::declval<base_t const &>()))
342 template <
typename base_t_ = base_t>
344 constexpr decltype(
auto)
345 operator[](
std::make_signed_t<difference_type> const n) noexcept(noexcept(
std::declval<base_t &>()[0]))
353 template <
typename base_t_ = base_t>
355 constexpr decltype(
auto) operator[](
std::make_signed_t<difference_type> const n) const
356 noexcept(noexcept(
std::declval<base_t const &>()[0]))
371 constexpr base_t & as_base() & noexcept
373 if constexpr (wrap_base)
380 constexpr base_t
const & as_base() const & noexcept
382 if constexpr (wrap_base)
389 constexpr derived_t * this_derived()
391 return static_cast<derived_t *
>(
this);
395 constexpr derived_t
const * this_derived()
const
397 return static_cast<derived_t
const *
>(
this);
Provides seqan3::detail::empty_type.
requires requires
The rank_type of the semi-alphabet; defined as the return type of seqan3::to_rank....
Definition: alphabet/concept.hpp:164
Provides various transformation traits for use on iterators.
SeqAn specific customisations in the standard namespace.