Enum anymap2::Entry

source ·
pub enum Entry<'a, A: ?Sized + UncheckedAnyExt, V: 'a> {
    Occupied(OccupiedEntry<'a, A, V>),
    Vacant(VacantEntry<'a, A, V>),
}
Expand description

A view into a single location in an Map, which may be vacant or occupied.

Variants§

§

Occupied(OccupiedEntry<'a, A, V>)

An occupied Entry

§

Vacant(VacantEntry<'a, A, V>)

A vacant Entry

Implementations§

source§

impl<'a, A: ?Sized + UncheckedAnyExt, V: IntoBox<A>> Entry<'a, A, V>

source

pub fn or_insert(self, default: V) -> &'a mut V

Ensures a value is in the entry by inserting the default if empty, and returns a mutable reference to the value in the entry.

source

pub fn or_insert_with<F: FnOnce() -> V>(self, default: F) -> &'a mut V

Ensures a value is in the entry by inserting the result of the default function if empty, and returns a mutable reference to the value in the entry.

source§

impl<'a, A: ?Sized + UncheckedAnyExt, V: Default + IntoBox<A>> Entry<'a, A, V>

source

pub fn or_default(self) -> &'a mut V

Ensures a value is in the entry by inserting the default value if empty, and returns a mutable reference to the value in the entry.

§Examples
let mut data = AnyMap::new();
{
    let r = data.entry::<i32>().or_default();
    assert_eq!(r, &mut 0);
    *r = 1;
}
assert_eq!(data.get(), Some(&1));
assert_eq!(data.entry::<i32>().or_default(), &mut 1);

Auto Trait Implementations§

§

impl<'a, A, V> Freeze for Entry<'a, A, V>
where A: ?Sized,

§

impl<'a, A, V> RefUnwindSafe for Entry<'a, A, V>

§

impl<'a, A, V> Send for Entry<'a, A, V>
where V: Send, A: Send + ?Sized,

§

impl<'a, A, V> Sync for Entry<'a, A, V>
where V: Sync, A: Sync + ?Sized,

§

impl<'a, A, V> Unpin for Entry<'a, A, V>
where V: Unpin, A: ?Sized,

§

impl<'a, A, V> !UnwindSafe for Entry<'a, A, V>

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

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.

source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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.
source§

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

Performs the conversion.
source§

impl<T> Any for T
where T: Any,