struct Bar<T>(T);
trait Baz {
fn hey();
}
impl Baz for u16 {
fn hey() {
let _: [u8; std::mem::size_of::<Self>()]; // ok
impl<T> Baz for Bar<T> {
let _: [u8; std::mem::size_of::<Self>()]; //~ERROR generic `Self`
fn main() {}