Struct ilyvion_util::cache::KeyedCache

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pub struct KeyedCache<F, K, V> where
    F: FnMut(&K) -> V,
    K: Hash + Eq,  { /* private fields */ }

Expand description

Caches the result of an (presumably) expensive operation such that accessing the result multiple times doesn’t result in running the expensive operation multiple times.

Implementations

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impl<F, K, V> KeyedCache<F, K, V> where
F: FnMut(&K) -> V,
K: Hash + Eq,

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pub fn new(calculation_fn: F) -> Self

Creates a new KeyedCache<F, V> initialized with the given calculation_fn function. The function will not be called until the result of a calculation is needed.

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pub fn value_mut(&mut self, key: K) -> &mut V

Gets a mutable reference to a contained calculated value based on the key. Runs the calculation function if this method call is the first time the value with the given key is accessed.

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pub fn value<Q: ?Sized>(&self, key: &Q) -> Option<&V> where
K: Borrow<Q>,
Q: Hash + Eq,

Gets a shared reference to the contained calculated value based on the key if it has already been calculated.

Trait Implementations

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impl<F: Debug, K: Debug, V: Debug> Debug for KeyedCache<F, K, V> where
F: FnMut(&K) -> V,
K: Hash + Eq,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<F, K, V> RefUnwindSafe for KeyedCache<F, K, V> where
 F: RefUnwindSafe,
 K: RefUnwindSafe,
 V: RefUnwindSafe,

impl<F, K, V> Send for KeyedCache<F, K, V> where
 F: Send,
 K: Send,
 V: Send,

impl<F, K, V> Sync for KeyedCache<F, K, V> where
 F: Sync,
 K: Sync,
 V: Sync,

impl<F, K, V> Unpin for KeyedCache<F, K, V> where
 F: Unpin,
 K: Unpin,
 V: Unpin,

impl<F, K, V> UnwindSafe for KeyedCache<F, K, V> where
 F: UnwindSafe,
 K: UnwindSafe,
 V: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> MapAny for T

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fn map<U, F>(self, map_fn: F) -> U where
F: Fn(T) -> U,

Takes a closure and calls it with Self, then returns whatever the closure returned. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct ilyvion_util::cache::KeyedCache

Implementations

impl<F, K, V> KeyedCache<F, K, V> where
F: FnMut(&K) -> V,
K: Hash + Eq,

pub fn new(calculation_fn: F) -> Self

pub fn value_mut(&mut self, key: K) -> &mut V

pub fn value<Q: ?Sized>(&self, key: &Q) -> Option<&V> where
K: Borrow<Q>,
Q: Hash + Eq,

Trait Implementations

impl<F: Debug, K: Debug, V: Debug> Debug for KeyedCache<F, K, V> where
F: FnMut(&K) -> V,
K: Hash + Eq,

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

Auto Trait Implementations

impl<F, K, V> RefUnwindSafe for KeyedCache<F, K, V> where
    F: RefUnwindSafe,
    K: RefUnwindSafe,
    V: RefUnwindSafe,

impl<F, K, V> Send for KeyedCache<F, K, V> where
    F: Send,
    K: Send,
    V: Send,

impl<F, K, V> Sync for KeyedCache<F, K, V> where
    F: Sync,
    K: Sync,
    V: Sync,

impl<F, K, V> Unpin for KeyedCache<F, K, V> where
    F: Unpin,
    K: Unpin,
    V: Unpin,

impl<F, K, V> UnwindSafe for KeyedCache<F, K, V> where
    F: UnwindSafe,
    K: UnwindSafe,
    V: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

fn into(self) -> U

impl<T> MapAny for T

fn map<U, F>(self, map_fn: F) -> U where
F: Fn(T) -> U,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Struct ilyvion_util::cache::KeyedCache

Implementations

impl<F, K, V> KeyedCache<F, K, V> where F: FnMut(&K) -> V, K: Hash + Eq,

pub fn new(calculation_fn: F) -> Self

pub fn value_mut(&mut self, key: K) -> &mut V

pub fn value<Q: ?Sized>(&self, key: &Q) -> Option<&V> where K: Borrow<Q>, Q: Hash + Eq,

Trait Implementations

impl<F: Debug, K: Debug, V: Debug> Debug for KeyedCache<F, K, V> where F: FnMut(&K) -> V, K: Hash + Eq,

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

Auto Trait Implementations

impl<F, K, V> RefUnwindSafe for KeyedCache<F, K, V> where F: RefUnwindSafe, K: RefUnwindSafe, V: RefUnwindSafe,

impl<F, K, V> Send for KeyedCache<F, K, V> where F: Send, K: Send, V: Send,

impl<F, K, V> Sync for KeyedCache<F, K, V> where F: Sync, K: Sync, V: Sync,

impl<F, K, V> Unpin for KeyedCache<F, K, V> where F: Unpin, K: Unpin, V: Unpin,

impl<F, K, V> UnwindSafe for KeyedCache<F, K, V> where F: UnwindSafe, K: UnwindSafe, V: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> MapAny for T

fn map<U, F>(self, map_fn: F) -> U where F: Fn(T) -> U,

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<F, K, V> KeyedCache<F, K, V> where
F: FnMut(&K) -> V,
K: Hash + Eq,

pub fn value<Q: ?Sized>(&self, key: &Q) -> Option<&V> where
K: Borrow<Q>,
Q: Hash + Eq,

impl<F: Debug, K: Debug, V: Debug> Debug for KeyedCache<F, K, V> where
F: FnMut(&K) -> V,
K: Hash + Eq,

impl<F, K, V> RefUnwindSafe for KeyedCache<F, K, V> where
F: RefUnwindSafe,
K: RefUnwindSafe,
V: RefUnwindSafe,

impl<F, K, V> Send for KeyedCache<F, K, V> where
F: Send,
K: Send,
V: Send,

impl<F, K, V> Sync for KeyedCache<F, K, V> where
F: Sync,
K: Sync,
V: Sync,

impl<F, K, V> Unpin for KeyedCache<F, K, V> where
F: Unpin,
K: Unpin,
V: Unpin,

impl<F, K, V> UnwindSafe for KeyedCache<F, K, V> where
F: UnwindSafe,
K: UnwindSafe,
V: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

fn map<U, F>(self, map_fn: F) -> U where
F: Fn(T) -> U,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,