| // Copyright 2012 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. |
| |
| // Test that a type whose lifetime parameters is never used is |
| // inferred to be bivariant. |
| |
| use std::kinds::marker; |
| |
| struct Bivariant<'a>; |
| |
| fn use1<'short,'long>(c: Bivariant<'short>, |
| _where:Option<&'short &'long ()>) { |
| let _: Bivariant<'long> = c; |
| } |
| |
| fn use2<'short,'long>(c: Bivariant<'long>, |
| _where:Option<&'short &'long ()>) { |
| let _: Bivariant<'short> = c; |
| } |
| |
| pub fn main() {} |
