std::Copyable (3) Linux Manual Page

std::Copyable – std::Copyable

Synopsis

Defined in header<concepts>

    template <class T>

    concept Copyable =

        std::CopyConstructible<T> &&(since C++ 20)

            std::Movable<T> &&

        std::Assignable<T &, const T &>;

The concept Copyable<T> specifies that T is an Movable object type that can also copied (that is, it supports copy construction and copy assignment).

Notes

It is intended that Copyable<T> also requires std::Assignable<T&, const T> (assignment from const rvalue) and std::Assignable<T&, T&> (assignment from non-const lvalue) to be satisfied.

See also

Movable specifies that an object of a type can be moved and swapped
        (concept)
(C++20)