Use matches by None in is_none method on Option

heckad · web-flow · commit f8e684495454 · 2023-04-17T17:55:02.000+03:00
diff --git a/library/core/src/option.rs b/library/core/src/option.rs
@@ -641,7 +641,7 @@ impl<T> Option<T> {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[rustc_const_stable(feature = "const_option_basics", since = "1.48.0")]
     pub const fn is_none(&self) -> bool {
-        !self.is_some()
+        matches!(*self, None)
     }
 
     /////////////////////////////////////////////////////////////////////////

Original file line number	Diff line number	Diff line change
`@@ -641,7 +641,7 @@ impl<T> Option<T> {`
`641`	`641`	`#[stable(feature = "rust1", since = "1.0.0")]`
`642`	`642`	`#[rustc_const_stable(feature = "const_option_basics", since = "1.48.0")]`
`643`	`643`	`pub const fn is_none(&self) -> bool {`
`644`		`- !self.is_some()`
	`644`	`+ matches!(*self, None)`
`645`	`645`	`}`
`646`	`646`
`647`	`647`	`/////////////////////////////////////////////////////////////////////////`