43 lines
1.1 KiB
Rust
43 lines
1.1 KiB
Rust
// Copyright 2015 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.
|
|
|
|
// Tests that we can combine a default impl that supplies one method with a
|
|
// full impl that supplies the other, and they can invoke one another.
|
|
|
|
#![feature(specialization)]
|
|
|
|
trait Foo {
|
|
fn foo_one(&self) -> &'static str;
|
|
fn foo_two(&self) -> &'static str;
|
|
fn foo_three(&self) -> &'static str;
|
|
}
|
|
|
|
struct MyStruct;
|
|
|
|
default impl<T> Foo for T {
|
|
fn foo_one(&self) -> &'static str {
|
|
self.foo_three()
|
|
}
|
|
}
|
|
|
|
impl Foo for MyStruct {
|
|
fn foo_two(&self) -> &'static str {
|
|
self.foo_one()
|
|
}
|
|
|
|
fn foo_three(&self) -> &'static str {
|
|
"generic"
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
assert!(MyStruct.foo_two() == "generic");
|
|
}
|