std::ranges::take_while_view<V,Pred>::begin
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Ranges library
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(C++23)
constexpr auto begin() requires (!/*simple-view*/<V>);
(1)
(since C++20)
constexpr auto begin() const requires
(2)
(since C++20)
ranges::range <const V> &&
Returns an iterator to the first element of the view. Effectively calls ranges::begin on the underlying view base_.
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).
[edit] Parameters
(none)
[edit] Return value
ranges::begin (base_), where base_ is the underlying view.
[edit] Example
This section is incomplete
Reason: no example
Reason: no example
[edit] 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 an iterator non-comparable to the sentinel | constrained |