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| author | Luuk Wester <luuk.wester@gmail.com> | 2025-01-21 14:45:30 +0100 |
|---|---|---|
| committer | Luuk Wester <luuk.wester@gmail.com> | 2025-01-21 14:45:30 +0100 |
| commit | e08f6d45305617b180856ae75969aac6c0db3a80 (patch) | |
| tree | e58efb05e35a1617d539de863e0bd102bc398e6f | |
| parent | 398cd2dbf63d67a0f58e1fa730883a7420f8ef70 (diff) | |
| download | rust-e08f6d45305617b180856ae75969aac6c0db3a80.tar.gz rust-e08f6d45305617b180856ae75969aac6c0db3a80.zip | |
switch from using leading zeros to trailing zeros
| -rw-r--r-- | src/tools/rust-analyzer/crates/ide/src/hover/render.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/tools/rust-analyzer/crates/ide/src/hover/render.rs b/src/tools/rust-analyzer/crates/ide/src/hover/render.rs index 95be7c5618e..fb7c2904afc 100644 --- a/src/tools/rust-analyzer/crates/ide/src/hover/render.rs +++ b/src/tools/rust-analyzer/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) |