class /*sentinel*/;
(since C++20)

The return type of filter_view::end when the underlying view type (V) does not model common_range.

The name sentinel is for exposition purposes only.

Data members

Typical implementations of sentinel hold only one non-static data member: the sentinel of the underlying view (shown here as end_ for exposition only).

Member functions

constructs a sentinel
(public member function)
returns the underlying sentinel
(public member function)


/*sentinel*/() = default;
(1) (since C++20)
constexpr explicit /*sentinel*/( filter_view& parent );
(2) (since C++20)
1) Value-initializes end_ via its default member initializer (= ranges::sentinel_t<V>()).
2) Initializes end_ with ranges::end(parent.base_).


constexpr ranges::sentinel_t<V> base() const;
(since C++20)

Equivalent to return end_;.

Non-member functions

compares the underlying iterator and the underlying sentinel

operator==(std::ranges::filter_view::iterator, std::ranges::filter_view::sentinel)

friend constexpr bool operator==( const /*iterator*/& x,
                                  const /*sentinel*/& y );
(since C++20)

Equivalent to return x.current_ == y.end_;, where current_ is the underlying iterator wrapped in filter_view::iterator.

The != operator is synthesized from operator==.

This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::ranges::filter_view::sentinel is an associated class of the arguments.

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