Error code E0576

An associated item wasn't found in the given type.

Erroneous code example:

#![allow(unused)] fn main() { trait Hello { type Who; fn hello() -> <Self as Hello>::You; // error! } }

In this example, we tried to use the nonexistent associated type You of the Hello trait. To fix this error, use an existing associated type:

#![allow(unused)] fn main() { trait Hello { type Who; fn hello() -> <Self as Hello>::Who; // ok! } }