The Copy
trait was implemented on a type which is neither a struct nor an enum.
Erroneous code example:
type Foo = [u8; 256]; impl Copy for Foo { } // error! #[derive(Copy, Clone)] struct Bar; impl Copy for &'static mut Bar { } // error!
You can only implement Copy
for a struct or an enum. Both of the previous examples will fail, because neither [u8; 256]
nor &'static mut Bar
(mutable reference to Bar
) is a struct or enum.