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1 | // Copyright 2012 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 | ||
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11 | // Check that `&mut` objects cannot be borrowed twice, just like |
12 | // other `&mut` pointers. | |
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14 | trait Foo { |
15 | fn f1(&mut self) -> &(); | |
16 | fn f2(&mut self); | |
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17 | } |
18 | ||
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19 | fn test(x: &mut Foo) { |
20 | let _y = x.f1(); | |
21 | x.f2(); //~ ERROR cannot borrow `*x` as mutable | |
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22 | } |
23 | ||
24 | fn main() {} |