bjoernager/rust
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Pulling out constant.

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Giles Cope 2021-02-06 20:35:21 +00:00
parent f165f49d22
commit f30c51abe8
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1 changed files with 5 additions and 4 deletions
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9
library/core/src/char/methods.rs
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@ -7,6 +7,9 @@ use crate::unicode::{self, conversions};
use super::*; use super::*;
/// If 6th bit set ascii is upper case.
const ASCII_CASE_MASK: u8 = 0b10_0000u8;
#[lang = "char"] #[lang = "char"]
impl char { impl char {
/// The highest valid code point a `char` can have. /// The highest valid code point a `char` can have.
@ -1090,8 +1093,7 @@ impl char {
#[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")] #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
#[inline] #[inline]
pub fn to_ascii_uppercase(&self) -> char { pub fn to_ascii_uppercase(&self) -> char {
// 6th bit dictates ascii case. if self.is_ascii_lowercase() { ((*self as u8) & !ASCII_CASE_MASK) as char } else { *self }
if self.is_ascii_lowercase() { ((*self as u8) & !0b10_0000u8) as char } else { *self }
} }
/// Makes a copy of the value in its ASCII lower case equivalent. /// Makes a copy of the value in its ASCII lower case equivalent.
@ -1119,8 +1121,7 @@ impl char {
#[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")] #[stable(feature = "ascii_methods_on_intrinsics", since = "1.23.0")]
#[inline] #[inline]
pub fn to_ascii_lowercase(&self) -> char { pub fn to_ascii_lowercase(&self) -> char {
// 6th bit dictates ascii case. if self.is_ascii_uppercase() { ((*self as u8) | ASCII_CASE_MASK) as char } else { *self }
if self.is_ascii_uppercase() { ((*self as u8) | 0b10_0000u8) as char } else { *self }
} }
/// Checks that two values are an ASCII case-insensitive match. /// Checks that two values are an ASCII case-insensitive match.