fn string_apply + 'a>()

in arrow-string/src/like.rs [270:318]

• 49 lines of code
• 10 McCabe index (conditional complexity)

fn string_apply<'a, T: StringArrayType<'a> + 'a>(
    op: Op,
    l: T,
    l_s: bool,
    l_v: Option<&'a dyn AnyDictionaryArray>,
    r: T,
    r_s: bool,
    r_v: Option<&'a dyn AnyDictionaryArray>,
) -> Result<BooleanArray, ArrowError> {
    let l_len = l_v.map(|l| l.len()).unwrap_or(l.len());
    if r_s {
        let idx = match r_v {
            Some(dict) if dict.null_count() != 0 => return Ok(BooleanArray::new_null(l_len)),
            Some(dict) => dict.normalized_keys()[0],
            None => 0,
        };
        if r.is_null(idx) {
            return Ok(BooleanArray::new_null(l_len));
        }
        op_scalar::<T>(op, l, l_v, r.value(idx))
    } else {
        match (l_s, l_v, r_v) {
            (true, None, None) => {
                let v = l.is_valid(0).then(|| l.value(0));
                op_binary(op, std::iter::repeat(v), r.iter())
            }
            (true, Some(l_v), None) => {
                let idx = l_v.is_valid(0).then(|| l_v.normalized_keys()[0]);
                let v = idx.and_then(|idx| l.is_valid(idx).then(|| l.value(idx)));
                op_binary(op, std::iter::repeat(v), r.iter())
            }
            (true, None, Some(r_v)) => {
                let v = l.is_valid(0).then(|| l.value(0));
                op_binary(op, std::iter::repeat(v), vectored_iter(r, r_v))
            }
            (true, Some(l_v), Some(r_v)) => {
                let idx = l_v.is_valid(0).then(|| l_v.normalized_keys()[0]);
                let v = idx.and_then(|idx| l.is_valid(idx).then(|| l.value(idx)));
                op_binary(op, std::iter::repeat(v), vectored_iter(r, r_v))
            }
            (false, None, None) => op_binary(op, l.iter(), r.iter()),
            (false, Some(l_v), None) => op_binary(op, vectored_iter(l, l_v), r.iter()),
            (false, None, Some(r_v)) => op_binary(op, l.iter(), vectored_iter(r, r_v)),
            (false, Some(l_v), Some(r_v)) => {
                op_binary(op, vectored_iter(l, l_v), vectored_iter(r, r_v))
            }
        }
    }
}