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[rustc.git] / src / test / compile-fail / specialization / specialization-polarity.rs
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.
4 //
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.
10
11 // Make sure specialization cannot change impl polarity
12
13 #![feature(optin_builtin_traits)]
14 #![feature(specialization)]
15
16 trait Foo {}
17
18 impl Foo for .. {}
19
20 impl<T> Foo for T {}
21 impl !Foo for u8 {} //~ ERROR E0119
22
23 trait Bar {}
24
25 impl Bar for .. {}
26
27 impl<T> !Bar for T {}
28 impl Bar for u8 {} //~ ERROR E0119
29
30 fn main() {}