module main

struct ParserResult[I, O] {
    i []I
    o []O
}

type TCount = u32

fn (count TCount) take_part[I, O](i []I) !ParserResult[I, O] {
    if i.len < count {
        return error('error1')
    }
    return ParserResult{
        i: i[count..]
        o: i[..count]
    }
}

fn (count TCount) print_part[T](v T) {
    _ = v
}

fn main() {
    _ = [TCount(4).take_part]
    f := TCount(4).print_part
    _ = f
}