Trait Reducer 

pub trait Reducer<T>: Send + Sync {
    // Required method
    fn reduce(&self, current: &mut T, update: T);
}

A strategy for merging an update: T into a current: &mut T.

Required Methods

fn reduce(&self, current: &mut T, update: T)

Merge update into current in place.

Implementors

impl Reducer<Value> for Merge

impl<T> Reducer<T> for Add

where T: AddAssign + Send + Sync,

impl<T, F> Reducer<T> for Custom<F>

where T: Send + Sync, F: Fn(&mut T, T) + Send + Sync,

impl<T: Send + Sync> Reducer<Option<T>> for LastValue

impl<T: Send + Sync> Reducer<Vec<T>> for Append