| // Copyright 2018 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // run-pass |
| |
| #![feature(specialization)] |
| |
| pub trait Foo { |
| fn abc() -> u32; |
| fn def() -> u32; |
| } |
| |
| pub trait Marker {} |
| |
| impl Marker for () {} |
| |
| impl<T> Foo for T { |
| default fn abc() -> u32 { 16 } |
| default fn def() -> u32 { 42 } |
| } |
| |
| impl<T: Marker> Foo for T { |
| fn def() -> u32 { |
| Self::abc() |
| } |
| } |
| |
| fn main() { |
| assert_eq!(<()>::def(), 16); |
| assert_eq!(<i32>::def(), 42); |
| } |
