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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. | |
4 | // | |
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. | |
10 | ||
11 | fn invariant_id<'a,'b>(t: &'b mut &'static ()) -> &'b mut &'a () | |
12 | where 'a: 'static { t } | |
13 | fn static_id<'a>(t: &'a ()) -> &'static () | |
14 | where 'a: 'static { t } | |
15 | fn static_id_indirect<'a,'b>(t: &'a ()) -> &'static () | |
16 | where 'a: 'b, 'b: 'static { t } | |
17 | fn ref_id<'a>(t: &'a ()) -> &'a () where 'static: 'a { t } | |
18 | ||
19 | static UNIT: () = (); | |
20 | ||
21 | fn main() | |
22 | { | |
23 | let mut val : &'static () = &UNIT; | |
24 | invariant_id(&mut val); | |
25 | static_id(val); | |
26 | static_id_indirect(val); | |
27 | ref_id(val); | |
28 | } |