ZoKrates/zokrates_cli/examples/book/generics.zok

def sum<N>(field[N] a) -> field {
    field mut res = 0;
    for u32 i in 0..N {
        res = res + a[i];
    }
    return res;
}

def main(field[3] a) -> field {
    return sum(a);
}