src/test/ui/impl-trait/deprecated_annotation.rs

// build-pass (FIXME(62277): could be check-pass?)

#![deny(warnings)]

#[deprecated]
trait Deprecated {}

#[deprecated]
struct DeprecatedTy;

#[allow(deprecated)]
impl Deprecated for DeprecatedTy {}

#[allow(deprecated)]
fn foo() -> impl Deprecated { DeprecatedTy }

fn main() {
    foo();
}