eq_ignore_ascii_case_with_tail.rs

// A possibly more efficient way to match pluralized strings case-insensitively.
// For example matching "burgers" and "burger" with fewer iterations.

// Untested
fn eq_ignore_ascii_case_with_tail(mut lhs: &str, rhs: &str, tail: char) -> bool {
    let mut lhs_len = lhs.len();
    let rhs_len = rhs.len();
    
    if lhs_len == rhs_len + 1 && lhs.ends_with(tail) {
        lhs = &lhs[..lhs_len - 1];
        lhs_len -= 1;
    }
    
    if lhs_len != rhs_len {
        return false;
    }
    
    std::iter::zip(lhs.as_bytes(), rhs.as_bytes()).all(|(a, b)| a.eq_ignore_ascii_case(b))
}