C++ named requirements: CopyConstructible

Specifies that an instance of the type can be copy-constructed from an lvalue expression.

# Notes

Until C++11, classes that overloaded operator& were not CopyConstructible and thus were not usable in the standard library containers. This is a design decision in C++98 (instead of a defect, see LWG issue 390).

Since C++11, the standard library uses std::addressof whenever the address of an object is needed.

Being a CopyConstructible class implies std::is_copy_constructible but not vice versa since std::is_copy_constructible will only check for the ability to call the constructor with the correct arguments, and, e.g., not a MoveConstructible requirement.

# See also

• is_copy_constructibleis_trivially_copy_constructibleis_nothrow_copy_constructible
• copy_constructible