18 Concepts library [concepts]

18.4 Language-related concepts [concepts.lang]

18.4.13 Concept move_constructible [concept.moveconstructible]

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template<class T> concept move_constructible = constructible_from<T, T> && convertible_to<T, T>;
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If T is an object type, then let rv be an rvalue of type T and u2 a distinct object of type T equal to rv.
T models move_constructible only if
  • (1.1)
    After the definition T u = rv;, u is equal to u2.
  • (1.2)
    T(rv) is equal to u2.
  • (1.3)
    If T is not const, rv's resulting state is valid but unspecified ([lib.types.movedfrom]); otherwise, it is unchanged.