Struct rs_transducers::transducers::KeepReducer

pub struct KeepReducer<R, F> { /* fields omitted */ }

Trait Implementations

impl<R, F, I, O, OF, E> Reducing<I, OF, E> for KeepReducer<R, F> where
    F: Fn(I) -> Option<O>,
    R: Reducing<O, OF, E>, 

type Item = O

The type of each value after the reducing function

fn init(&mut self)

Transducers must call the underlying init TODO: may not be required at all. Not currently used by any implementation

fn step(&mut self, value: I) -> Result<StepResult, E>

Each step, may fail TODO: the return type to contain an indicator of early termination

fn complete(&mut self) -> Result<(), E>

Transducers must call the underlying complete