rust/src/test/run-pass/specialization/defaultimpl/specialization-traits-impl.rs

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// Copyright 2014 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.
#![feature(specialization)]
trait Foo {
fn foo_one(&self) -> &'static str;
fn foo_two(&self) -> &'static str;
}
default impl<T> Foo for T {
fn foo_one(&self) -> &'static str {
"generic"
}
}
default impl<T: Clone> Foo for T {
fn foo_two(&self) -> &'static str {
"generic Clone"
}
}
struct MyStruct;
fn main() {
assert!(MyStruct.foo_one() == "generic");
assert!(0u8.foo_two() == "generic Clone");
}