Trait fn_memo::unsync::Cache

pub trait Cache {
    type Arg;
    type Output;
    fn new() -> Self;
    fn get(&self, arg: &Self::Arg) -> Option<&Self::Output>;
    fn cache(&mut self, arg: Self::Arg, result: Self::Output);
    fn clear(&mut self);
}

The cache for single-thread memoization.

Associated Types

type Arg

type Output

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Required methods

fn new() -> Self

Create an empty cache.

fn get(&self, arg: &Self::Arg) -> Option<&Self::Output>

Gets the cached result of arg. If it is not cached, returns None.

fn cache(&mut self, arg: Self::Arg, result: Self::Output)

Caches the arg with result.

fn clear(&mut self)

Clears the cache.

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Implementations on Foreign Types

impl<Arg: Clone + Eq + Hash, Output: Clone> Cache for HashMap<Arg, Output>

Use HashMap as Cache.

type Arg = Arg

type Output = Output

fn new() -> Self

fn get(&self, arg: &Arg) -> Option<&Output>

fn cache(&mut self, arg: Arg, result: Output)

fn clear(&mut self)

impl<Output: Clone> Cache for Vec<Option<Output>>

Use Vec as Cache for sequences.

type Arg = usize

type Output = Output

fn new() -> Self

fn get(&self, arg: &usize) -> Option<&Output>

fn cache(&mut self, arg: usize, result: Output)

fn clear(&mut self)

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Implementors

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