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docs: clarify case-insensitive helpers #1

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RAprogramm merged 1 commit into from
Sep 11, 2025
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docs: clarify case-insensitive helpers #1

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7 changes: 3 additions & 4 deletions src/turnkey.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -168,8 +168,8 @@ pub fn classify_turnkey_error(msg: &str) -> TurnkeyErrorKind {
}
}

/// ASCII case-insensitive `haystack.contains(needle)` without allocation.
/// comments in English
/// Returns true if `haystack` contains `needle` ignoring ASCII case.
/// Performs the search without allocating.
#[inline]
fn contains_nocase(haystack: &str, needle: &str) -> bool {
// Fast path: empty needle always matches.
Expand All @@ -192,8 +192,7 @@ fn contains_any_nocase(haystack: &str, needles: &[&str]) -> bool {
needles.iter().any(|n| contains_nocase(haystack, n))
}

/// Lowercase for ASCII bytes only; leaves non-ASCII untouched.
/// comments in English
/// Converts ASCII letters to lowercase and leaves other bytes unchanged.
#[inline]
const fn ascii_lower(b: u8) -> u8 {
// ASCII-only fold without RangeInclusive to keep const-friendly on MSRV 1.89
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