Trait sit_core::reducers::Reducer

pub trait Reducer: Sized {
    type State;
    type Item;
    fn reduce(&mut self, state: Self::State, item: &Self::Item) -> Self::State;

    fn chain<R: Reducer<State = Self::State, Item = Self::Item>>(
        self, 
        other: R
    ) -> ChainedReducer<Self, R> { ... }
}

Generic reducer trait

Associated Types

type State

State type

type Item

Item type

Required Methods

fn reduce(&mut self, state: Self::State, item: &Self::Item) -> Self::State

Takes current state, item and returns new state

Provided Methods

fn chain<R: Reducer<State = Self::State, Item = Self::Item>>(
    self,
    other: R
) -> ChainedReducer<Self, R>

Chains two reducers together sequentially

Implementors

impl<'a, R: Record> Reducer for DuktapeReducer<'a, R> where     R: HasPath,

type State = Map<String, JsonValue>

type Item = R

fn reduce(&mut self, state: Self::State, item: &Self::Item) -> Self::State

fn chain<R: Reducer<State = Self::State, Item = Self::Item>>(     self,     other: R ) -> ChainedReducer<Self, R>

impl<T, I, R1: Reducer<State = T, Item = I>, R2: Reducer<State = T, Item = I>> Reducer for ChainedReducer<R1, R2>

type State = R1::State

type Item = R1::Item

fn reduce(&mut self, state: Self::State, item: &Self::Item) -> Self::State

fn chain<R: Reducer<State = Self::State, Item = Self::Item>>(     self,     other: R ) -> ChainedReducer<Self, R>