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Parker

ref_mut_stack

Struct Parker 

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pub struct Parker<'a, R, T> { /* private fields */ }
Expand description

The parker helper.

It must be used by calling Parker::park, passing the reference holder of type T which becomes unreachable until it is unparked.

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impl<'a, R, T> Parker<'a, R, T>

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pub fn park<F>(self, holder: T, f: F) -> ParkableRefMut<'a, R, T>
where R: 'a, T: 'a, F: Fn(&'a mut R) -> &'a mut R,

Parks the reference holder which becomes unreachable until it is unparked.

The callback is used to derive a new mutable reference from the current one in the stack.

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impl<'a, R, T> Freeze for Parker<'a, R, T>

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impl<'a, R, T> RefUnwindSafe for Parker<'a, R, T>
where R: RefUnwindSafe, T: RefUnwindSafe,

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impl<'a, R, T> !Send for Parker<'a, R, T>

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impl<'a, R, T> !Sync for Parker<'a, R, T>

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impl<'a, R, T> Unpin for Parker<'a, R, T>

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impl<'a, R, T> UnsafeUnpin for Parker<'a, R, T>

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impl<'a, R, T> UnwindSafe for Parker<'a, R, T>
where R: RefUnwindSafe, T: RefUnwindSafe,

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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.