| // 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. |
| |
| trait Q<T:?Sized> {} |
| trait Foo where u32: Q<Self> { |
| fn foo(&self); |
| } |
| |
| impl Q<()> for u32 {} |
| impl Foo for () { |
| fn foo(&self) { |
| println!("foo!"); |
| } |
| } |
| |
| fn main() { |
| let _f: Box<Foo> = //~ ERROR `Foo` cannot be made into an object |
| Box::new(()); //~ ERROR `Foo` cannot be made into an object |
| } |
