Enum Entry

pub enum Entry<'a, K, S: ?Sized = DefaultStorage>where
    K: TypeMapKey,{
    Occupied(OccupiedEntry<'a, K, S>),
    Vacant(VacantEntry<'a, K, S>),
}

Expand description

A view into a single entry in the TypeMap, which may either be vacant or occupied.

This heavily mirrors the official Entry API in the standard library, but not all of it is provided due to implementation restrictions. Please refer to its documentations.

Variants§

Occupied(OccupiedEntry<'a, K, S>)

Vacant(VacantEntry<'a, K, S>)

Implementations§

impl<'a, K, S> Entry<'a, K, S>
where K: TypeMapKey, K::Value: IntoBox<S>, S: ?Sized + Any + Send + Sync,

pub fn or_insert(self, value: K::Value) -> &'a mut K::Value

pub fn or_insert_with<F>(self, f: F) -> &'a mut K::Value
where F: FnOnce() -> K::Value,

pub fn and_modify<F>(self, f: F) -> Self
where F: FnOnce(&mut K::Value),

impl<'a, K, S> Entry<'a, K, S>
where K: TypeMapKey, K::Value: Default + IntoBox<S>, S: ?Sized + Any + Send + Sync,

pub fn or_default(self) -> &'a mut K::Value

Auto Trait Implementations§

impl<'a, K, S> Freeze for Entry<'a, K, S>
where S: ?Sized,

impl<'a, K, S> RefUnwindSafe for Entry<'a, K, S>
where <K as TypeMapKey>::Value: RefUnwindSafe, S: RefUnwindSafe + ?Sized,

impl<'a, K, S> Send for Entry<'a, K, S>
where S: Send + ?Sized,

impl<'a, K, S> Sync for Entry<'a, K, S>
where S: Sync + ?Sized,

impl<'a, K, S> Unpin for Entry<'a, K, S>
where S: ?Sized,

impl<'a, K, S = dyn Any + Sync + Send> !UnwindSafe for Entry<'a, K, S>

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.