1 // Copyright 2013 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 // Exercise the unused_mut attribute in some positive and negative cases
13 #[allow(dead_assignment)];
14 #[allow(unused_variable)];
16 #[allow(deprecated_owned_vector)];
21 let mut a = 3; //~ ERROR: variable does not need to be mutable
22 let mut a = 2; //~ ERROR: variable does not need to be mutable
23 let mut b = 3; //~ ERROR: variable does not need to be mutable
24 let mut a = vec!(3); //~ ERROR: variable does not need to be mutable
25 let (mut a, b) = (1, 2); //~ ERROR: variable does not need to be mutable
28 mut x => {} //~ ERROR: variable does not need to be mutable
31 let x = |mut y: int| 10; //~ ERROR: variable does not need to be mutable
32 fn what(mut foo: int) {} //~ ERROR: variable does not need to be mutable
37 let mut a = Vec::new();
39 let mut a = Vec::new();
43 let (mut a, b) = (1, 2);
52 let x = |mut y: int| y = 32;
53 fn nothing(mut foo: int) { foo = 37; }
55 // leading underscore should avoid the warning, just like the
56 // unused variable lint.
62 // make sure the lint attribute can be turned off