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

nylonicious · web-flow · commit 0700d6a7cdbb · 2023-09-29T16:43:38.000+02:00
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)
     }

Original file line number	Diff line number	Diff line change
`@@ -163,6 +163,7 @@ impl Interest {`
`163`	`163`	`///`
`164`	`164`	`/// assert!(BOTH.is_readable());`
`165`	`165`	`/// assert!(BOTH.is_writable());`
	`166`	`+ #[must_use = "this returns the result of the operation, without modifying the original"]`
`166`	`167`	`pub const fn add(self, other: Interest) -> Interest {`
`167`	`168`	`Self(self.0 \| other.0)`
`168`	`169`	`}`