rust/tests/ui/unpretty/diagnostic-attr.rs

//@ compile-flags: -Zunpretty=hir
//@ check-pass
//@ edition: 2015

#[diagnostic::on_unimplemented(
    message = "My Message for `ImportantTrait<{A}>` implemented for `{Self}`",
    label = "My Label",
    note = "Note 1",
    note = "Note 2"
)]
pub trait ImportantTrait<A> {}

#[diagnostic::do_not_recommend]
impl<T> ImportantTrait<T> for T where T: Clone {}