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 // Test that two distinct impls which match subtypes of one another
12 // yield coherence errors (or not) depending on the variance.
18 impl Contravariant for for<'a,'b> fn(&'a u8, &'b u8) {
22 impl Contravariant for for<'a> fn(&'a u8, &'a u8) {
25 ///////////////////////////////////////////////////////////////////////////
31 impl Covariant for for<'a,'b> fn(&'a u8, &'b u8) {
35 impl Covariant for for<'a> fn(&'a u8, &'a u8) {
38 ///////////////////////////////////////////////////////////////////////////
41 fn foo(&self) -> Self { }
44 impl Invariant for for<'a,'b> fn(&'a u8, &'b u8) {
47 impl Invariant for for<'a> fn(&'a u8, &'a u8) {