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// Copyright 2015 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.
#![allow(dead_code)]
// Test that even when `T` is only used in covariant position, it
// is treated as invariant.
trait Get<T> {
fn get(&self) -> T;
}
fn get_min_from_max<'min, 'max, G>()
where 'max : 'min, G : Get<&'max i32>
{
// Previously OK, now an error as traits are invariant.
impls_get::<G,&'min i32>() //~ ERROR mismatched types
}
fn get_max_from_min<'min, 'max, G>()
where 'max : 'min, G : Get<&'min i32>
{
impls_get::<G,&'max i32>() //~ ERROR mismatched types
}
fn impls_get<G,T>() where G : Get<T> { }
fn main() { }
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