# std::move_constructible

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< cpp‎ | concepts

Defined in header `<concepts>` |  |
template< class T > concept move_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 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.

### 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

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

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