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