Function range_zip::generate_helper_func

pub(crate) fn generate_helper_func(params: &Params) -> String

Output:

pub fn range_zip_2x2<Idx, IR0, R0, IR1, R1, IO0, O0, IO1, O1>(
    r0: IR0,
    r1: IR1,
    o0: IO0,
    o1: IO1,
) -> RangeZip2x2<Idx, IR0::IntoIter, R0, IR1::IntoIter, R1, IO0::IntoIter, O0, IO1::IntoIter, O1>
where
    Idx: std::cmp::Ord,
    IR0: IntoIterator<Item = (Idx, R0)>,
    IR1: IntoIterator<Item = (Idx, R1)>,
    IO0: IntoIterator<Item = (Idx, O0)>,
    IO1: IntoIterator<Item = (Idx, O1)>,
{
    RangeZip2x2 {
        r0: r0.into_iter(),
        r1: r1.into_iter(),
        o0: o0.into_iter().peekable(),
        o1: o1.into_iter().peekable(),

        o0_data_latest: None,
        o1_data_latest: None,
    }
}