From cppreference.com
template<classT>conceptmove_constructible=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 be constructed from an rvalue of that type in both direct- and copy-initialization contexts, with the usual semantics.
Semantic requirements
If T is an object type, then move_constructible<T> is modeled 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 Tu=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.
References
C++23 standard (ISO/IEC 14882:2024):
18.4.13 Concept move_constructible [concept.moveconstructible]
C++20 standard (ISO/IEC 14882:2020):
18.4.13 Concept move_constructible [concept.moveconstructible]
See also