Struct OptionMemo 

pub struct OptionMemo<K: Hash + Eq, V: Clone> { /* private fields */ }

Memoizing wrapper around a function returning Option<T>.

Caches computed results to avoid recomputing them.

Implementations

impl<K: Hash + Eq, V: Clone> OptionMemo<K, V>

pub fn new() -> Self

Create an empty memo table.

pub fn get_or_compute( &mut self, key: K, f: impl FnOnce(&K) -> Option<V>, ) -> Option<V>

where K: Clone,

Get the memoized result for key, computing it with f if necessary.

pub fn clear(&mut self)

Clear the memo table.

pub fn len(&self) -> usize

Number of memoized entries.

pub fn is_empty(&self) -> bool

Check if empty.

Trait Implementations

impl<K: Hash + Eq, V: Clone> Default for OptionMemo<K, V>

fn default() -> Self

Returns the “default value” for a type.