Defined in header <concepts> | ||
---|---|---|
template< class T > concept MoveConstructible = std::Constructible<T, T> && std::ConvertibleTo<T, T>; | (since C++20) |
The concept MoveConstructible
is satisfied if T
is a reference type, or if it is an object type where an object of that type can constructed from an rvalue of that type in both direct- and copy-initialization contexts, with the usual semantics.
More precisely, if T
is an object type, then MoveConstructible<T>
is satisfied only if given.
rv
, an rvalue of type T
, and u2
, a distinct object of type T
equal to rv
, the following are true:
T u = rv;
, u
is equal to u2
; T(rv)
is equal to u2
; and T
is not const-qualified, then rv
's resulting state (after the definition/expression is evaluated in either bullets above) is valid but unspecified; otherwise, it is unchanged.
(C++11)(C++11)(C++11) | checks if a type can be constructed from an rvalue reference (class template) |
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