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> {
16 fn dummy(&'a self) { } // just to induce a variance on 'a
20 fn refs<'a, H: HasLife<'a>>(&'a self) -> H;
24 fn refs<'a, T, H: HasType<&'a T>>(&'a self) -> H;
30 fn dummy(&self, t: T) -> T { panic!() }
35 fn refs<'a, H: HasType<&'a T>>(&'a self) -> H;
39 // (The functions below were not actually a problem observed during
40 // fixing of #12856; they just seem like natural tests to put in to
41 // cover a couple more points in the testing space)
43 pub fn top_refs_1<'a, H: HasLife<'a>>(_s: &'a ()) -> H {
47 pub fn top_refs_2<'a, T, H: HasType<&'a T>>(_s: &'a ()) -> H {