Struct BindingScope 

pub struct BindingScope { /* private fields */ }

A scope that owns bindings and disposes them on drop.

BindingScope provides a convenient way to manage the lifetime of multiple bindings. When the scope is dropped, all owned bindings are disposed.

Examples

let count = Signal::new(0);
let display = Rc::new(RefCell::new(String::new()));

{
    let mut scope = BindingScope::new();
    scope.bind(&count, {
        let display = display.clone();
        move |v: &i32| *display.borrow_mut() = format!("{v}")
    });
    count.set(5);
    assert_eq!(*display.borrow(), "5");
}
// Scope dropped — binding disposed.
count.set(99);
// display still shows "5" because the binding is gone.

Implementations

impl BindingScope

pub fn new() -> Self

Create a new empty binding scope.

pub fn bind<T: Clone + 'static>( &mut self, source: &Signal<T>, sink: impl PropertySink<T> + 'static, ) -> BindingId

Create a one-way binding from source to sink.

Returns the binding ID.

pub fn bind_two_way<T: Clone + 'static>( &mut self, source: &Signal<T>, sink: impl PropertySink<T> + 'static, ) -> (TwoWayBinding<T>, BindingId)

Create a two-way binding between source and sink.

Returns the TwoWayBinding (for calling write_back) and the binding ID.

pub fn bind_expression<S: Clone + 'static, T: Clone + 'static>( &mut self, source: &Signal<S>, transform: impl Fn(&S) -> T + 'static, sink: impl PropertySink<T> + 'static, ) -> BindingId

Create a binding expression (source → transform → sink).

Returns the binding ID.

pub fn binding_count(&self) -> usize

Get the number of bindings in this scope.

pub fn is_binding_active(&self, id: BindingId) -> bool

Check if a specific binding is still active.

Trait Implementations

impl Default for BindingScope

fn default() -> Self

Returns the “default value” for a type.

impl Drop for BindingScope

fn drop(&mut self)

Executes the destructor for this type.