Trait Accumulator 

pub trait Accumulator<ValAccum, ValIn> {
    // Required method
    fn accumulate<Key>(&mut self, entry: Entry<'_, Key, ValAccum>, item: ValIn);
}

Generalization of fold, reduce, etc.

Required Methods

fn accumulate<Key>(&mut self, entry: Entry<'_, Key, ValAccum>, item: ValIn)

Accumulates a value into an either occupied or vacant table entry.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<InitFn, FoldFn, Accum, Item> Accumulator<Accum, Item> for Fold<InitFn, FoldFn>

where InitFn: Fn() -> Accum, FoldFn: Fn(&mut Accum, Item),

impl<InitFn, FoldFn, Accum, Item> Accumulator<Accum, Item> for FoldFrom<InitFn, FoldFn>

where InitFn: Fn(Item) -> Accum, FoldFn: Fn(&mut Accum, Item),

impl<ReduceFn, Item> Accumulator<Item, Item> for Reduce<ReduceFn>

where ReduceFn: Fn(&mut Item, Item),