tokens

Struct NeverChangeToken

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pub struct NeverChangeToken;
Expand description

Represents a ChangeToken that never changes.

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impl NeverChangeToken

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pub fn new() -> Self

Initializes a new change token.

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impl ChangeToken for NeverChangeToken

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fn changed(&self) -> bool

Gets a value that indicates if a change has occurred.
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fn must_poll(&self) -> bool

Indicates if this token will proactively raise callbacks. Read more
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fn register( &self, _callback: Callback, _state: Option<Arc<dyn Any>>, ) -> Registration

Registers for a callback that will be invoked when the token has changed. Read more
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impl Default for NeverChangeToken

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fn default() -> NeverChangeToken

Returns the “default value” for a type. Read more
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impl Send for NeverChangeToken

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impl Sync for NeverChangeToken

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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.