| // Copyright 2016 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. |
| |
| use std::fmt; |
| |
| trait Foo { |
| fn foo(&self) -> (Self, Self); |
| } |
| |
| impl<T: Copy> Foo for T { |
| fn foo(&self) -> (Self, Self) { |
| (*self, *self) |
| } |
| } |
| |
| fn main() { |
| assert_eq!((11).foo(), (11, 11)); |
| |
| let junk: Box<fmt::Debug+Sized> = Box::new(42); |
| let f = format!("{:?}", junk); |
| assert_eq!(f, "42"); |
| } |
