Trait Thin 

pub unsafe trait Thin { }

Trait indicating that a type has no metadata.

This usually means Self: Sized or Self is extern.

Safety

Implementors must ensure this type has no metadata (<Self as Pointee>::Metadata = ()).

Example

fn never_panics<T: Thin>() {
    assert_eq!(<&T>::SZ, usize::SZ)
}

Implementors