W3cubDocs

/C++

std::MoveConstructible

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:

  • After the definition T u = rv;, u is equal to u2;
  • T(rv) is equal to u2; and
  • If 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.

See also

(C++11)(C++11)(C++11)
checks if a type can be constructed from an rvalue reference
(class template)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
http://en.cppreference.com/w/cpp/concepts/MoveConstructible