Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Use bitwise XOR in to_ascii_uppercase #95831

Merged
merged 1 commit into from
Apr 9, 2022
Merged

Use bitwise XOR in to_ascii_uppercase #95831

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions library/core/src/num/mod.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -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.
Expand Down