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std::indirectly_copyable

Defined in header <iterator> 
template< class In, class Out >
concept indirectly_copyable =
    std::indirectly_readable<In> &&
    std::indirectly_writable<Out, std::iter_reference_t<In>>;
 (since C++20)

The indirectly_copyable concept specifies the relationship between an indirectly_readable type and a type that is indirectly_writable. The indirectly_writable type must be able to directly copy the object that the indirectly_readable type references.

See also

(C++20)
specifies that values may be moved from an indirectly_readable type to an indirectly_writable type
(concept)
(C++20)
specifies that values may be copied from an indirectly_readable type to an indirectly_writable type and that the copy may be performed via an intermediate object
(concept)

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