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SignalCell

Struct SignalCell 

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

A Sync wrapper for single-threaded global Signal access.

SAFETY: This type is only safe to use in single-threaded contexts (e.g., WASM). It implements Sync to allow usage as a static variable, but concurrent access from multiple threads would be undefined behavior.

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impl<T> SignalCell<T>
where T: Clone + PartialEq,

Implementation of SignalCell construction and access.

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pub const fn new() -> Self

Creates a new empty SignalCell with no signal stored.

§Returns
  • SignalCell<T>: An empty cell ready to hold a signal.
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pub fn set(&self, signal: Signal<T>)

Stores a signal into the cell.

§Arguments
  • Signal<T>: The signal to store.
§Panics

Panics if a signal has already been stored.

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pub fn get(&self) -> Signal<T>

Returns the signal stored in the cell.

§Returns
  • Signal<T>: The stored signal.
§Panics

Panics if no signal has been stored via set.

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impl<T> Default for SignalCell<T>
where T: Clone + PartialEq,

Provides a default empty SignalCell.

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<T> Sync for SignalCell<T>
where T: Clone + PartialEq,

SAFETY: SignalCell is only used in single-threaded WASM contexts. Concurrent access from multiple threads would be undefined behavior.

Auto Trait Implementations§

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impl<T> !Freeze for SignalCell<T>

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impl<T> !RefUnwindSafe for SignalCell<T>

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impl<T> !Send for SignalCell<T>

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impl<T> Unpin for SignalCell<T>

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impl<T> UnsafeUnpin for SignalCell<T>

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impl<T> !UnwindSafe for SignalCell<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.
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impl<S, T> Upcast<T> for S
where T: UpcastFrom<S> + ?Sized, S: ?Sized,

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fn upcast(&self) -> &T
where Self: ErasableGeneric, T: ErasableGeneric<Repr = Self::Repr>,

Perform a zero-cost type-safe upcast to a wider ref type within the Wasm bindgen generics type system. Read more
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fn upcast_into(self) -> T
where Self: Sized + ErasableGeneric, T: ErasableGeneric<Repr = Self::Repr>,

Perform a zero-cost type-safe upcast to a wider type within the Wasm bindgen generics type system. Read more