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

take_while_view() requires std::default_initializable<V> &&
                           std::default_initializable<Pred> = default;
 (1) (since C++20) 
constexpr explicit take_while_view( V base, Pred pred );
 (2) (since C++20)

Constructs a take_while_view.

1) Default constructor. Value-initializes the underlying view and the predicate.
2) Move constructs the underlying view from base and the predicate from pred.

Parameters

base - underlying view
fun - predicate

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 3714
(P2711R1)		 C++20 the multi-parameter constructor was not explicit made explicit
P2325R3 C++20 if Pred is not default_initializable, the default constructor
constructs a take_while_view which does not contain an Pred		 the take_while_view is also
not default_initializable

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