typemap

Struct VacantEntry

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pub struct VacantEntry<'a, K, A: ?Sized + UnsafeAnyExt + 'a = dyn UnsafeAny> { /* private fields */ }
Expand description

A view onto an unoccupied entry in a TypeMap.

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impl<'a, K: Key, A: ?Sized + UnsafeAnyExt> VacantEntry<'a, K, A>

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pub fn insert(self, value: K::Value) -> &'a mut K::Value
where K::Value: Any + Implements<A>,

Set the entry’s value and return a mutable reference to it.

Auto Trait Implementations§

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impl<'a, K, A> Freeze for VacantEntry<'a, K, A>
where A: ?Sized,

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impl<'a, K, A> RefUnwindSafe for VacantEntry<'a, K, A>
where K: RefUnwindSafe, A: RefUnwindSafe + ?Sized,

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impl<'a, K, A> Send for VacantEntry<'a, K, A>
where K: Send, A: Send + ?Sized,

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impl<'a, K, A> Sync for VacantEntry<'a, K, A>
where K: Sync, A: Sync + ?Sized,

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impl<'a, K, A> Unpin for VacantEntry<'a, K, A>
where K: Unpin, A: ?Sized,

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impl<'a, K, A = dyn UnsafeAny> !UnwindSafe for VacantEntry<'a, K, A>

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