ranges::v3::view_facade< Derived, Cardinality > Struct Template Reference

Description

template<typename Derived, cardinality Cardinality>
struct ranges::v3::view_facade< Derived, Cardinality >

A utility for constructing a view from a (derived) type that implements begin and end cursors.

Template Parameters

Derived	A type that derives from view_facade and implements begin and end cursors. This type is permitted to be incomplete.
Cardinality	The cardinality of this view: finite, infinite, or unknown. See ranges::v3::cardinality.

Inheritance diagram for ranges::v3::view_facade< Derived, Cardinality >:

Public Member Functions
template<typename D = Derived, requires = (Same<D, Derived>())>
detail::facade_iterator_t< D >	begin ()
	Let d be static_cast<Derived &>(*this). Let b be std::as_const(d).begin_cursor() if that expression is well-formed; otherwise, let b be d.begin_cursor(). Let B be the type of b. More...
template<typename D = Derived, requires = (Same<D, Derived>())>
detail::facade_iterator_t< D const >	begin () const
template<typename D = Derived, requires = (Same<D, Derived>())>
detail::facade_sentinel_t< D >	end ()
	Let d be static_cast<Derived &>(*this). Let e be std::as_const(d).end_cursor() if that expression is well-formed; otherwise, let e be d.end_cursor(). Let E be the type of e. More...
template<typename D = Derived, requires = (Same<D, Derived>())>
detail::facade_sentinel_t< D const >	end () const
Public Member Functions inherited from ranges::v3::view_interface< Derived, Cardinality >
template<typename D = Derived, requires = (Same<D, Derived>() && RandomAccessRange<D>() && SizedRange<D>())>
auto	at (range_difference_type_t< D > n) -> decltype(std::declval< D &>().begin()[n])
	Returns a reference to the element at specified location pos, with bounds checking.
template<typename D = Derived, requires = (Same<D, Derived>() && RandomAccessRange<D const>() && SizedRange<D const>())>
auto	at (range_difference_type_t< D > n) const -> decltype(std::declval< D const &>().begin()[n])
template<typename D = Derived, requires = (Same<D, Derived>() && BoundedRange<D>() && BidirectionalRange<D>())>
range_reference_t< D >	back ()
	Access the last element in a range:
template<typename D = Derived, requires = (Same<D, Derived>() && BoundedRange<D const>() && BidirectionalRange<D const>())>
range_reference_t< D const >	back () const
constexpr bool	empty () const noexcept
template<typename D = Derived, requires = (Same<D, Derived>() && Cardinality < 0 && ForwardRange<D const>())>
constexpr bool	empty () const noexcept(noexcept(bool(ranges::begin(std::declval< D const &>())==ranges::end(std::declval< D const &>()))))
template<typename D = Derived, requires = (Same<D, Derived>() && ForwardRange<D>())>
range_reference_t< D >	front ()
	Access the first element in a range:
template<typename D = Derived, requires = (Same<D, Derived>() && ForwardRange<D const>())>
range_reference_t< D const >	front () const
template<typename D = Derived, requires = (Same<D, Derived>()), typename = decltype(ranges::empty(std::declval<D const &>()))>
constexpr	operator bool () const noexcept(noexcept(ranges::empty(std::declval< D const &>())))
template<typename Container , typename D = Derived, typename = typename Container::allocator_type, requires = (detail::ConvertibleToContainer<D, Container>())>
	operator Container ()
	Implicit conversion to something that looks like a container.
template<typename Container , typename D = Derived, typename = typename Container::allocator_type, requires = (detail::ConvertibleToContainer<D const, Container>())>
	operator Container () const
template<typename D = Derived, requires = (Same<D, Derived>())>
constexpr auto	operator! () const noexcept(noexcept(decltype(ranges::empty(std::declval< D const &>()))(ranges::empty(std::declval< D const &>())))) -> decltype(ranges::empty(std::declval< D const &>()))
view_interface &	operator= (view_interface &&)=default
view_interface &	operator= (view_interface const &)=default
template<typename D = Derived, requires = (Same<D, Derived>() && RandomAccessRange<D>())>
auto	operator[] (range_difference_type_t< D > n) -> decltype(std::declval< D &>().begin()[n])
	Simple indexing:
template<typename D = Derived, requires = (Same<D, Derived>() && RandomAccessRange<D const>())>
auto	operator[] (range_difference_type_t< D > n) const -> decltype(std::declval< D const &>().begin()[n])
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >> offs) &-> decltype(std::declval< Slice >()(std::declval< D &>(), offs.from, offs.to))
	Python-ic slicing:
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >> offs) const &-> decltype(std::declval< Slice >()(std::declval< D const &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >> offs) &&-> decltype(std::declval< Slice >()(std::declval< D >(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >, detail::from_end_< range_difference_type_t< D >>> offs) &-> decltype(std::declval< Slice >()(std::declval< D &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >, detail::from_end_< range_difference_type_t< D >>> offs) const &-> decltype(std::declval< Slice >()(std::declval< D const &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >, detail::from_end_< range_difference_type_t< D >>> offs) &&-> decltype(std::declval< Slice >()(std::declval< D >(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< detail::from_end_< range_difference_type_t< D >>, detail::from_end_< range_difference_type_t< D >>> offs) &-> decltype(std::declval< Slice >()(std::declval< D &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< detail::from_end_< range_difference_type_t< D >>, detail::from_end_< range_difference_type_t< D >>> offs) const &-> decltype(std::declval< Slice >()(std::declval< D const &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< detail::from_end_< range_difference_type_t< D >>, detail::from_end_< range_difference_type_t< D >>> offs) &&-> decltype(std::declval< Slice >()(std::declval< D >(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >, end_fn > offs) &-> decltype(std::declval< Slice >()(std::declval< D &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >, end_fn > offs) const &-> decltype(std::declval< Slice >()(std::declval< D const &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< range_difference_type_t< D >, end_fn > offs) &&-> decltype(std::declval< Slice >()(std::declval< D >(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< detail::from_end_< range_difference_type_t< D >>, end_fn > offs) &-> decltype(std::declval< Slice >()(std::declval< D &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< detail::from_end_< range_difference_type_t< D >>, end_fn > offs) const &-> decltype(std::declval< Slice >()(std::declval< D const &>(), offs.from, offs.to))
template<typename D = Derived, typename Slice = view::slice_fn, requires = (Same<D, Derived>())>
auto	operator[] (detail::slice_bounds< detail::from_end_< range_difference_type_t< D >>, end_fn > offs) &&-> decltype(std::declval< Slice >()(std::declval< D >(), offs.from, offs.to))
template<typename D = Derived, requires = (Same<D, Derived>() && Cardinality >= 0)>
constexpr range_size_type_t< D >	size () const noexcept
	Access the size of the range, if it can be determined:
template<typename D = Derived, requires = (Same<D, Derived>() && Cardinality < 0 && SizedSentinel<sentinel_t<D const>, iterator_t<D const>>() && ForwardRange<D const>())>
constexpr range_size_type_t< D >	size () const
	view_interface (view_interface &&)=default
	view_interface (view_interface const &)=default

Protected Member Functions
Derived	begin_cursor () const
constexpr default_sentinel	end_cursor () const
Protected Member Functions inherited from ranges::v3::view_interface< Derived, Cardinality >
Derived &	derived () noexcept
constexpr Derived const &	derived () const noexcept

Protected Attributes
friend	range_access

Member Function Documentation

begin() [1/2]

template<typename Derived, cardinality Cardinality>

template<typename D = Derived, requires = (Same<D, Derived>())>

detail::facade_iterator_t<D> ranges::v3::view_facade< Derived, Cardinality >::begin

(

)

Let d be static_cast<Derived &>(*this). Let b be std::as_const(d).begin_cursor() if that expression is well-formed; otherwise, let b be d.begin_cursor(). Let B be the type of b.

Returns

ranges::v3::basic_iterator<B>(b)

begin() [2/2]

template<typename Derived, cardinality Cardinality>

template<typename D = Derived, requires = (Same<D, Derived>())>

detail::facade_iterator_t<D const> ranges::v3::view_facade< Derived, Cardinality >::begin

(

)

const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

end() [1/2]

template<typename Derived, cardinality Cardinality>

template<typename D = Derived, requires = (Same<D, Derived>())>

detail::facade_sentinel_t<D> ranges::v3::view_facade< Derived, Cardinality >::end

(

)

Let d be static_cast<Derived &>(*this). Let e be std::as_const(d).end_cursor() if that expression is well-formed; otherwise, let e be d.end_cursor(). Let E be the type of e.

Returns

ranges::v3::basic_iterator<E>(e) if E is the same as B computed above for begin(); otherwise, return e.

end() [2/2]

template<typename Derived, cardinality Cardinality>

template<typename D = Derived, requires = (Same<D, Derived>())>

detail::facade_sentinel_t<D const> ranges::v3::view_facade< Derived, Cardinality >::end

(

)

const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.