-// Copyright 2017 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.
-
// compile-pass
#![warn(unused_must_use)]
fn need_to_use_this_method_value(&self) -> usize {
self.n
}
+
+ #[must_use]
+ fn need_to_use_this_associated_function_value() -> isize {
+ -1
+ }
}
trait EvenNature {
m.is_even(); // trait method!
//~^ WARN unused return value
+ MyStruct::need_to_use_this_associated_function_value();
+ //~^ WARN unused return value
+
m.replace(3); // won't warn (annotation needs to be in trait definition)
// comparison methods are `must_use`