std::move_constructible - cppreference.com (original) (raw)

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.

[edit] 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 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] 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]

[edit] See also