| //@ revisions: pass fail |
| //@[pass] check-pass |
| |
| #![allow(internal_features)] |
| #![feature(staged_api)] |
| #![allow(dead_code)] |
| #![unstable(feature = "feat_foo", issue = "none" )] |
| |
| #![cfg_attr(fail, feature(feat_foo))] |
| |
| /// In staged-api crate, using an unstable impl requires |
| /// #[unstable_feature_bound(..)], not #[feature(..)]. |
| |
| pub trait Foo { |
| fn foo(); |
| } |
| pub struct Bar; |
| |
| #[unstable_feature_bound(feat_foo)] |
| impl Foo for Bar { |
| fn foo() {} |
| } |
| |
| #[cfg_attr(pass, unstable_feature_bound(feat_foo))] |
| fn bar() { |
| Bar::foo(); |
| //[fail]~^ ERROR: unstable feature `feat_foo` is used without being enabled. |
| } |
| |
| fn main() {} |
