Trait Accumulator

pub trait Accumulator {
    type State;
    type Update;

    // Required methods
    fn accumulate(
        &self,
        state: &mut Self::State,
        update: Self::Update,
    ) -> Result<()>;
    fn reducer_spec(&self) -> Option<ReducerSpec>;
}

An accumulator is a object that accumulates updates into a state.

Required Associated Types

type State

The type of the accumulated state.

type Update

The type of the updates sent to the accumulator. Updates will be accumulated into type Self::State.

Required Methods

fn accumulate( &self, state: &mut Self::State, update: Self::Update, ) -> Result<()>

Accumulate an update into the current state.

fn reducer_spec(&self) -> Option<ReducerSpec>

The specification used to build the reducer.

Implementors