From f8e6844954542eb0e20e728b2318c1b4ccf8bce9 Mon Sep 17 00:00:00 2001
From: Kazantcev Andrey <heckad@yandex.ru>
Date: Mon, 17 Apr 2023 17:55:02 +0300
Subject: [PATCH] Use `matches` by None in `is_none` method on Option

---
 library/core/src/option.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/core/src/option.rs b/library/core/src/option.rs
index 057053297cd2d..6490bffc715f0 100644
--- 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)
     }
 
     /////////////////////////////////////////////////////////////////////////