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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 | #![deny(unused_results, unused_must_use)] | |
12 | #![allow(dead_code)] | |
13 | ||
14 | #[must_use] | |
15 | enum MustUse { Test } | |
16 | ||
17 | #[must_use = "some message"] | |
18 | enum MustUseMsg { Test2 } | |
19 | ||
20 | fn foo<T>() -> T { panic!() } | |
21 | ||
22 | fn bar() -> isize { return foo::<isize>(); } | |
23 | fn baz() -> MustUse { return foo::<MustUse>(); } | |
24 | fn qux() -> MustUseMsg { return foo::<MustUseMsg>(); } | |
25 | ||
26 | #[allow(unused_results)] | |
27 | fn test() { | |
28 | foo::<isize>(); | |
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29 | foo::<MustUse>(); //~ ERROR: unused `MustUse` which must be used |
30 | foo::<MustUseMsg>(); //~ ERROR: unused `MustUseMsg` which must be used: some message | |
1a4d82fc JJ |
31 | } |
32 | ||
33 | #[allow(unused_results, unused_must_use)] | |
34 | fn test2() { | |
35 | foo::<isize>(); | |
36 | foo::<MustUse>(); | |
37 | foo::<MustUseMsg>(); | |
38 | } | |
39 | ||
40 | fn main() { | |
41 | foo::<isize>(); //~ ERROR: unused result | |
041b39d2 XL |
42 | foo::<MustUse>(); //~ ERROR: unused `MustUse` which must be used |
43 | foo::<MustUseMsg>(); //~ ERROR: unused `MustUseMsg` which must be used: some message | |
1a4d82fc JJ |
44 | |
45 | let _ = foo::<isize>(); | |
46 | let _ = foo::<MustUse>(); | |
47 | let _ = foo::<MustUseMsg>(); | |
48 | } |