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std::ranges::take_while_view<V,Pred>::end

constexpr auto end() requires (!__SimpleView<V>);
 (1) (since C++20) 
constexpr auto end() const requires
    ranges::range<const V> &&
    std::indirect_unary_predicate<const Pred, ranges::iterator_t<const V>>;
 (2) (since C++20)

Returns a sentinel representing the end of the view.

Let base_ denote the underlying view.

1) Effectively returns /*sentinel*/<false>(ranges::end(base_), std::addressof(pred())).
2) Effectively returns /*sentinel*/<true>(ranges::end(base_), std::addressof(pred())).

Overload (1) does not participate in overload resolution if V is a simple view (that is, if V and const V are views with the same iterator and sentinel types).

Parameters

(none)

Return value

A sentinel representing the end of the view.

Example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 3450 C++20 the const overload might return a sentinel non-comparable to the iterator constrained

See also

(C++20)
returns an iterator to the beginning
(public member function)
(C++20)
compares a sentinel with an iterator returned from take_while_view::begin
(function)

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