1 // Copyright 2012 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 // Test that a type which is covariant with respect to its region
12 // parameter is successful when used in a covariant way.
14 // Note: see compile-fail/variance-regions-*.rs for the tests that
15 // check that the variance inference works in the first place.
17 // This is covariant with respect to 'a, meaning that
18 // Covariant<'foo> <: Covariant<'static> because
20 // pretty-expanded FIXME #23616
22 struct Covariant<'a> {
23 f: extern "Rust" fn(&'a int)
26 fn use_<'a>(c: Covariant<'a>) {
27 // OK Because Covariant<'a> <: Covariant<'static> iff 'a <= 'static
28 let _: Covariant<'static> = c;