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Rollup merge of #118236 - ksw2000:update_mod_comment, r=cuviper

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Update mod comment

The comment of `ASCII_CASE_MASK` on line 477  is `If 6th bit is set ascii is lower case.` but the original comment of `*self ^ ((self.is_ascii_lowercase() as u8) * ASCII_CASE_MASK)` was `Toggle the fifth bit if this is a lowercase letter`
This commit is contained in:
Matthias Krüger 2023-11-28 09:28:36 +01:00 committed by GitHub
commit 4704d49629
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1 changed files with 3 additions and 3 deletions
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6
library/core/src/num/mod.rs
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@ -474,7 +474,7 @@ impl isize {
}
}
/// If 6th bit is set ascii is lower case.
/// If the 6th bit is set ascii is lower case.
const ASCII_CASE_MASK: u8 = 0b0010_0000;
impl u8 {
@ -549,7 +549,7 @@ pub const fn as_ascii(&self) -> Option<ascii::Char> {
#[rustc_const_stable(feature = "const_ascii_methods_on_intrinsics", since = "1.52.0")]
#[inline]
pub const fn to_ascii_uppercase(&self) -> u8 {
// Toggle the fifth bit if this is a lowercase letter
// Toggle the 6th bit if this is a lowercase letter
*self ^ ((self.is_ascii_lowercase() as u8) * ASCII_CASE_MASK)
}
@ -574,7 +574,7 @@ pub const fn to_ascii_uppercase(&self) -> u8 {
#[rustc_const_stable(feature = "const_ascii_methods_on_intrinsics", since = "1.52.0")]
#[inline]
pub const fn to_ascii_lowercase(&self) -> u8 {
// Set the fifth bit if this is an uppercase letter
// Set the 6th bit if this is an uppercase letter
*self | (self.is_ascii_uppercase() as u8 * ASCII_CASE_MASK)
}