io: mark Interest::add with #[must_use] (#6037)

tokio-rs · Sep 29, 2023 · 0700d6a · 0700d6a
1 parent ca89c5b
commit 0700d6a
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/tokio/src/io/interest.rs b/tokio/src/io/interest.rs
@@ -163,6 +163,7 @@ impl Interest {
     ///
     /// assert!(BOTH.is_readable());
     /// assert!(BOTH.is_writable());
+    #[must_use = "this returns the result of the operation, without modifying the original"]
     pub const fn add(self, other: Interest) -> Interest {
         Self(self.0 | other.0)
     }