Signal

Remarks

Writing a value equal to the current one does nothing at all — no version bump, no notification, no effect run. That is not an optimisation bolted on the side; it is the property the rest of the graph is built to preserve, and the reason a text box that re-assigns the same string on every keystroke does not repaint the window.

"Equal" means Default unless a comparer is supplied. For a mutable reference type that is usually wrong — the object is the same instance, so it compares equal, and a change made in place is invisible. Either hold an immutable value, or pass Never``1 and accept that every write propagates.

Fields and properties (1)

• public T Value

  The current value.

Methods (5)

• public Signal(T initial, IEqualityComparer<T>? comparer = null)

  Creates a signal holding .

• public T Peek()

  The current value without recording a dependency.

• public void Update(Func<T, T> update)

  Replaces the value with a function of the current one.

• public void Update<TState>(TState state, Func<T, TState, T> update)

  Replaces the value with a function of the current one and some state.

• public void Invalidate()

  Forces every dependent to re-evaluate, whatever the comparer thinks.

Used by (32)

• AsyncComputedVixen.Ui.Reactive
• AsyncComputedTestsVixen.Ui.Reactive.Tests
• BareVixen.Ui.Tests
• BoundVixen.Ui.Tests
• BranchingVixen.Ui.Tests
• CarryingVixen.Ui.HotReload.Tests
• CompositionTestsVixen.Ui.Tests
• ComputedTestsVixen.Ui.Reactive.Tests
• CounterVixen.Ui.Tests
• CountingVixen.Ui.HotReload.Tests
• EffectPassTestsVixen.Ui.Tests
• EffectTestsVixen.Ui.Reactive.Tests
• EmitterTestsVixen.Ui.Markup.Tests
• GraphTestsVixen.Ui.Reactive.Tests
• GuestVixen.Ui.Tests
• HostingVixen.Ui.Tests
• HotReloadTestsVixen.Ui.HotReload.Tests
• LeadingBranchVixen.Ui.Tests
• LinkedSignalTestsVixen.Ui.Reactive.Tests
• ListingVixen.Ui.Tests
• MixedVixen.Ui.Tests
• NestedVixen.Ui.Tests
• SignalTestsVixen.Ui.Reactive.Tests
• SwitchingVixen.Ui.Tests
• VxmlGeneratorTestsVixen.Ui.Markup.Generators.Tests
• BackgroundTaskVixen.Editor.Ui
• CommandStackVixen.Editor.Core
• EditorDocumentVixen.Editor.Core
• EditorProjectVixen.Editor.Core
• EditorPropertyVixen.Editor.Core
• TaskCenterVixen.Editor.Ui
• UndoHistoryVixen.Editor.App