Struct s2n_quic_core::memo::Memo

pub struct Memo<T: Copy, Input, Check = DefaultConsistencyCheck> { /* private fields */ }

A datastructure that memoizes a query function

This can be used for when queries rarely change and can potentially be expensive or on hot code paths. After the input is mutated, the query value should be cleared to signal that the function needs to be executed again.

In debug mode the get call will always run the query and assert that the values match.

Implementations

impl<T: Copy + PartialEq + Debug, Input, Check: ConsistencyCheck> Memo<T, Input, Check>

pub fn new(query: fn(_: &Input) -> T) -> Self

Creates a new Memo over a query function

pub fn get(&self, input: &Input) -> T

Returns the current value of the query function, which may be cached

pub fn clear(&self)

Clears the cached value of the query function

pub fn check_consistency(&self, input: &Input)

Asserts that the cached value reflects the current query result in debug mode

Trait Implementations

impl<T: Clone + Copy, Input: Clone, Check: Clone> Clone for Memo<T, Input, Check>

fn clone(&self) -> Memo<T, Input, Check>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Copy + Debug, Input, Check> Debug for Memo<T, Input, Check>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.