Function trailing_digits

cranelift/reader/src/lexer.rs:99–106

Get the number of decimal digits at the end of `s`.

(s: &str)

/// Get the number of decimal digits at the end of `s`.
fn trailing_digits(s: &str) -> usize {
    // It's faster to iterate backwards over bytes, and we're only counting ASCII digits.
    s.as_bytes()
        .iter()
        .rev()
        .take_while(|&&b| b'0' <= b && b <= b'9')
        .count()
}

/// Pre-parse a supposed entity name by splitting it into two parts: A head of lowercase ASCII
/// letters and numeric tail.