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std::move_constructible

From cppreference.com
< cpp‎ | concepts
Defined in header <concepts>
template< class T >
concept MoveConstructible = std::constructible_from<T, T> && std::convertible_to<T, T>;
(since C++20)

The concept move_constructible 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 move_constructible<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.

[edit] See also

checks if a type can be constructed from an rvalue reference
(class template) [edit]