Function memchr2_double_string

src/classmap_scanner.rs:1585–1587

(haystack: &[u8])

/// offset and the byte found.  Uses `memchr` for SIMD acceleration.
#[inline]
fn memchr2_double_string(haystack: &[u8]) -> Option<(usize, u8)> {
    memchr::memchr2(b'"', b'\\', haystack).map(|pos| (pos, haystack[pos]))
}

/// Check whether the keyword at position `i` is preceded by `use `
/// (with optional whitespace), indicating a `use function` or `use const`