1 // Copyright 2014 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 // Issue #12856: a lifetime formal binding introduced by a generic fn
12 // should not upset the variance inference for actual occurrences of
13 // that lifetime in type expressions.
15 pub trait HasLife<'a> { }
18 fn refs<'a, H: HasLife<'a>>(&'a self) -> H;
22 fn refs<'a, T, H: HasType<&'a T>>(&'a self) -> H;
26 pub trait HasType<T> { }
29 fn refs<'a, H: HasType<&'a T>>(&'a self) -> H;
33 // (The functions below were not actually a problem observed during
34 // fixing of #12856; they just seem like natural tests to put in to
35 // cover a couple more points in the testing space)
37 pub fn top_refs_1<'a, H: HasLife<'a>>(_s: &'a ()) -> H {
41 pub fn top_refs_2<'a, T, H: HasType<&'a T>>(_s: &'a ()) -> H {