ZoKrates/zokrates_cli/examples/book/generic_call.zok

def foo<N, P>() -> field[P] {
    return [42; P];
}

def main() -> field[2] {
    // `P` is inferred from the declaration of `res`, while `N` is provided explicitly
    field[2] res = foo::<3, _>();
    return res;
}