Struct BindingExpression 

pub struct BindingExpression<S: Clone + 'static, T: Clone + 'static> { /* private fields */ }

A binding that transforms the source value before pushing to the sink.

Uses a Computed internally so the transform result is cached and only re-evaluated when the source changes.

Examples

let count = Signal::new(3);
let label = Rc::new(RefCell::new(String::new()));

let binding = BindingExpression::new(
    &count,
    |v: &i32| format!("Count: {v}"),
    {
        let label = label.clone();
        move |v: &String| *label.borrow_mut() = v.clone()
    },
);

count.set(7);
assert_eq!(*label.borrow(), "Count: 7");

Implementations

impl<S: Clone + 'static, T: Clone + 'static> BindingExpression<S, T>

pub fn new( source: &Signal<S>, transform: impl Fn(&S) -> T + 'static, sink: impl PropertySink<T> + 'static, ) -> Self

Create a binding that transforms source values via transform before pushing to sink.

Trait Implementations

impl<S: Clone + 'static, T: Clone + 'static> Binding for BindingExpression<S, T>

fn id(&self) -> BindingId

Unique identifier for this binding.

fn direction(&self) -> BindingDirection

Direction of data flow.

fn is_active(&self) -> bool

Whether this binding is still active.

fn dispose(&self)

Permanently deactivate this binding.