20 General utilities library [utilities]

20.11 Smart pointers [smartptr]

20.11.1 Class template unique_ptr [unique.ptr]

20.11.1.4 unique_ptr for array objects with a runtime length [unique.ptr.runtime]

20.11.1.4.3 Assignment [unique.ptr.runtime.asgn]

template<class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept;

This operator behaves the same as in the primary template.

Constraints: Where UP is unique_ptr<U, E>:

(2.1)
U is an array type, and
(2.2)
pointer is the same type as element_type*, and
(2.3)
UP::pointer is the same type as UP::element_type*, and
(2.4)
UP::element_type(*)[] is convertible to element_type(*)[], and
(2.5)
is_assignable_v<D&, E&&> is true.

[Note 1:

This replaces the Constraints: specification of the primary template.

— end note]