From f6d4720f26c92e9905c98b4ee2db832927e30a8a Mon Sep 17 00:00:00 2001
From: Dylan MacKenzie <ecstaticmorse@gmail.com>
Date: Sat, 8 Feb 2020 21:27:13 -0800
Subject: [PATCH] Make `u8::is_ascii` a stable `const fn`

`char::is_ascii` is already a stable `const fn`, so there is no reason
for `u8::is_ascii` to be unstable.
---
 src/libcore/num/mod.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index ed37b48b3e85..81ef99e5b1c2 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -4300,8 +4300,9 @@ impl u8 {
     /// assert!(!non_ascii.is_ascii());
     /// ```
     #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
+    #[rustc_const_stable(feature = "const_ascii_methods_on_intrinsics", since = "1.43.0")]
     #[inline]
-    pub fn is_ascii(&self) -> bool {
+    pub const fn is_ascii(&self) -> bool {
         *self & 128 == 0
     }