AsyncSignalImpl<T> class

Implementation of AsyncSignal that manages async state transitions.

This is the concrete implementation of the AsyncSignal interface. AsyncSignal wraps an AsyncSource and provides a reactive interface to async operations, automatically managing state transitions and providing convenient access to the current async state.

See AsyncSignal for the public interface and usage examples.

Example:

final future = Future.delayed(Duration(seconds: 1), () => 'Hello');
final signal = AsyncSignal.fromFuture(future);

// React to state changes
Effect(() {
  final state = signal.value;
  if (state.isLoading) print('Loading...');
  if (state.isSuccess) print('Data: ${state.data}');
  if (state.isError) print('Error: ${state.error}');
});