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switch from using leading zeros to trailing zeros

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This commit is contained in:
Luuk Wester 2025-01-21 14:45:30 +01:00
parent 6b6e019593
commit 705eb84941
1 changed files with 4 additions and 1 deletions
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5
crates/ide/src/hover/render.rs
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@ -1235,9 +1235,12 @@ fn is_pwr2plus1(val: u128) -> bool {
val != 0 && is_pwr2(val - 1) val != 0 && is_pwr2(val - 1)
} }
/// Formats a power of two as an exponent of two, i.e. 16 => ⁴. Note that `num` MUST be a power
/// of 2, or this function will panic.
fn pwr2_to_exponent(num: u128) -> String { fn pwr2_to_exponent(num: u128) -> String {
const DIGITS: [char; 10] = ['⁰', '¹', '²', '³', '⁴', '⁵', '⁶', '⁷', '⁸', '⁹']; const DIGITS: [char; 10] = ['⁰', '¹', '²', '³', '⁴', '⁵', '⁶', '⁷', '⁸', '⁹'];
(127 - num.leading_zeros()) assert_eq!(num.count_ones(), 1);
num.trailing_zeros()
.to_string() .to_string()
.chars() .chars()
.map(|c| c.to_digit(10).unwrap() as usize) .map(|c| c.to_digit(10).unwrap() as usize)