split_before

more_itertools::grouping::split_before

Function split_before 

Source 
pub fn split_before<T>(
    iter: Box<dyn Iterator<Item = Result<T, Error>>>,
    pred: fn(&T) -> Result<bool, Error>,
    maxsplit: i128,
) -> Box<dyn Iterator<Item = Result<Vec<T>, Error>>>
where
    T: Clone + 'static,