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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. | |
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 a<'a, 'b:'a>(x: &mut &'a isize, y: &mut &'b isize) { | |
12 | // Note: this is legal because of the `'b:'a` declaration. | |
13 | *x = *y; | |
14 | } | |
15 | ||
16 | fn b<'a, 'b>(x: &mut &'a isize, y: &mut &'b isize) { | |
17 | // Illegal now because there is no `'b:'a` declaration. | |
54a0048b | 18 | *x = *y; //~ ERROR E0312 |
1a4d82fc JJ |
19 | } |
20 | ||
21 | fn c<'a,'b>(x: &mut &'a isize, y: &mut &'b isize) { | |
22 | // Here we try to call `foo` but do not know that `'a` and `'b` are | |
23 | // related as required. | |
54a0048b | 24 | a(x, y); //~ ERROR E0495 |
1a4d82fc JJ |
25 | } |
26 | ||
27 | fn d() { | |
28 | // 'a and 'b are early bound in the function `a` because they appear | |
29 | // inconstraints: | |
30 | let _: fn(&mut &isize, &mut &isize) = a; //~ ERROR mismatched types | |
31 | } | |
32 | ||
33 | fn e() { | |
34 | // 'a and 'b are late bound in the function `b` because there are | |
35 | // no constraints: | |
36 | let _: fn(&mut &isize, &mut &isize) = b; | |
37 | } | |
38 | ||
39 | fn main() { } |