rt_graph::observable_value

Struct ReadHalf

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pub struct ReadHalf<T>
where
    T: Clone,
{ /* private fields */ }
Expand description

The read half of an ObservableValue, which can only listen for updates and read the current value.

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impl<T> ReadHalf<T>
where T: Clone,

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pub fn get(&self) -> T

Get the current value

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pub fn connect<F>(&mut self, callback: F) -> SubscriptionId
where F: Fn(&T) + 'static,

Connect a new subscriber that will receive callbacks when the value is set.

Returns a SubscriptionId to disconnect the subscription when no longer required.

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pub fn disconnect(&mut self, sub_id: SubscriptionId)

Disconnect an existing subscription.

Auto Trait Implementations§

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impl<T> Freeze for ReadHalf<T>

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impl<T> !RefUnwindSafe for ReadHalf<T>

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impl<T> !Send for ReadHalf<T>

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impl<T> !Sync for ReadHalf<T>

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impl<T> Unpin for ReadHalf<T>

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impl<T> !UnwindSafe for ReadHalf<T>

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.