Enum vec_map::Entry

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pub enum Entry<'a, V: 'a> {
    Vacant(VacantEntry<'a, V>),
    Occupied(OccupiedEntry<'a, V>),
}
Expand description

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

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Vacant(VacantEntry<'a, V>)

A vacant Entry

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Occupied(OccupiedEntry<'a, V>)

An occupied Entry

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impl<'a, V> Entry<'a, V>

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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.

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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.

Auto Trait Implementations§

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impl<'a, V> Freeze for Entry<'a, V>

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impl<'a, V> RefUnwindSafe for Entry<'a, V>
where V: RefUnwindSafe,

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impl<'a, V> Send for Entry<'a, V>
where V: Send,

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impl<'a, V> Sync for Entry<'a, V>
where V: Sync,

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impl<'a, V> Unpin for Entry<'a, V>

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

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,

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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,

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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

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fn from(t: T) -> T

Returns the argument unchanged.

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.