Error code E0206
The Copy
trait was implemented on a type which is neither a struct, an
enum, nor a union.
Erroneous code example:
#![allow(unused)] fn main() { #[derive(Copy, Clone)] struct Bar; impl Copy for &'static mut Bar { } // error! }
You can only implement Copy
for a struct, an enum, or a union.
The previous example will fail because &'static mut Bar
is not a struct, an enum, or a union.