std::experimental::ranges::CopyConstructible - cppreference.com (original) (raw)

| | | | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | ----------- | | template< class T > concept bool CopyConstructible = MoveConstructible<T> && Constructible<T, T&> && ConvertibleTo<T&, T> && Constructible<T, const T&> && ConvertibleTo<const T&, T> && Constructible<T, const T> && ConvertibleTo<const T, T>; | | (ranges TS) |

The concept CopyConstructible is satisfied if T is an lvalue reference type, or if it is a MoveConstructible object type where an object of that type can constructed from a (possibly const) lvalue or const rvalue of that type in both direct- and copy-initialization contexts with the usual semantics (a copy is constructed with the source unchanged).

More precisely, if T is an object type, then CopyConstructible<T> is satisfied only if given

• v, an lvalue of type (possibly const) T or an rvalue of type const T,

the following are true:

• After the definition T u = v;, u is equal to v;
• T{v} is equal to v.

[edit] See also