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Diffstat (limited to 'crates/ide/src/hover/render.rs')
| -rw-r--r-- | crates/ide/src/hover/render.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/crates/ide/src/hover/render.rs b/crates/ide/src/hover/render.rs index 95be7c5618..fb7c2904af 100644 --- a/crates/ide/src/hover/render.rs +++ b/crates/ide/src/hover/render.rs @@ -1235,9 +1235,12 @@ fn is_pwr2plus1(val: u128) -> bool { 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 { 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() .chars() .map(|c| c.to_digit(10).unwrap() as usize) |