std::Semiregular

From cppreference.com
< cpp‎ | concepts
Defined in header <concepts>
template <class T>
concept Semiregular = std::Copyable<T> && std::DefaultConstructible<T>;
(since C++20)

The Semiregular concept specifies that a type is both copyable and default constructible. It is satisfied by types that behave similarly to built-in types like int, except that they need not support comparison with ==.