1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![feature(specialization)]
13 // Make sure we can't project defaulted associated types
20 default type Assoc = ();
27 fn generic<T>() -> <T as Foo>::Assoc {
28 // `T` could be some downstream crate type that specializes (or,
29 // for that matter, `u8`).
31 () //~ ERROR mismatched types
34 fn monomorphic() -> () {
35 // Even though we know that `()` is not specialized in a
36 // downstream crate, typeck refuses to project here.
38 generic::<()>() //~ ERROR mismatched types
42 // No error here, we CAN project from `u8`, as there is no `default`
44 let s: String = generic::<u8>();
45 println!("{}", s); // bad news if this all compiles