| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![allow(dead_code)] |
| #![deny(unused_results, unused_must_use)] |
| //~^ NOTE: lint level defined here |
| //~| NOTE: lint level defined here |
| |
| #[must_use] |
| enum MustUse { Test } |
| |
| #[must_use = "some message"] |
| enum MustUseMsg { Test2 } |
| |
| fn foo<T>() -> T { panic!() } |
| |
| fn bar() -> isize { return foo::<isize>(); } |
| fn baz() -> MustUse { return foo::<MustUse>(); } |
| fn qux() -> MustUseMsg { return foo::<MustUseMsg>(); } |
| |
| #[allow(unused_results)] |
| fn test() { |
| foo::<isize>(); |
| foo::<MustUse>(); //~ ERROR: unused `MustUse` which must be used |
| foo::<MustUseMsg>(); //~ ERROR: unused `MustUseMsg` which must be used |
| //~^ NOTE: some message |
| } |
| |
| #[allow(unused_results, unused_must_use)] |
| fn test2() { |
| foo::<isize>(); |
| foo::<MustUse>(); |
| foo::<MustUseMsg>(); |
| } |
| |
| fn main() { |
| foo::<isize>(); //~ ERROR: unused result |
| foo::<MustUse>(); //~ ERROR: unused `MustUse` which must be used |
| foo::<MustUseMsg>(); //~ ERROR: unused `MustUseMsg` which must be used |
| //~^ NOTE: some message |
| |
| let _ = foo::<isize>(); |
| let _ = foo::<MustUse>(); |
| let _ = foo::<MustUseMsg>(); |
| } |