Error code E0566
Conflicting representation hints have been used on a same item.
Erroneous code example:
#![allow(unused)] fn main() { #[repr(u32, u64)] enum Repr { A } }
In most cases (if not all), using just one representation hint is more than
enough. If you want to have a representation hint depending on the current
architecture, use cfg_attr
. Example:
#![allow(unused)] fn main() { #[cfg_attr(linux, repr(u32))] #[cfg_attr(not(linux), repr(u64))] enum Repr { A } }