Function reduce_all_binary_cpu_rayon 

pub fn reduce_all_binary_cpu_rayon<TI1, TI2, TS, TO, D, I, F, FSum, FOut>(
    a: &[TI1],
    la: &Layout<D>,
    b: &[TI2],
    lb: &Layout<D>,
    init: I,
    f: F,
    f_sum: FSum,
    f_out: FOut,
    pool: Option<&ThreadPool>,
) -> Result<TO, Error>
where
    TI1: Clone + Send + Sync,
    TI2: Clone + Send + Sync,
    TS: Clone + Send + Sync,
    TO: Clone + Send + Sync,
    D: DimAPI,
    I: Fn() -> TS + Send + Sync,
    F: Fn(TS, (TI1, TI2)) -> TS + Send + Sync,
    FSum: Fn(TS, TS) -> TS + Send + Sync,
    FOut: Fn(TS) -> TO + Send + Sync,