diff options
| -rw-r--r-- | library/core/src/num/mod.rs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/library/core/src/num/mod.rs b/library/core/src/num/mod.rs index a30d2ff0ea6..98c9bf556bb 100644 --- a/library/core/src/num/mod.rs +++ b/library/core/src/num/mod.rs @@ -299,8 +299,8 @@ impl u8 { #[rustc_const_stable(feature = "const_ascii_methods_on_intrinsics", since = "1.52.0")] #[inline] pub const fn to_ascii_uppercase(&self) -> u8 { - // Unset the fifth bit if this is a lowercase letter - *self & !((self.is_ascii_lowercase() as u8) * ASCII_CASE_MASK) + // Toggle the fifth bit if this is a lowercase letter + *self ^ ((self.is_ascii_lowercase() as u8) * ASCII_CASE_MASK) } /// Makes a copy of the value in its ASCII lower case equivalent. |