Function signal

packages/2d/src/lib/decorators/signal.ts:113–136

()

 * ```
 */
export function signal<T>(): PropertyDecorator {
  return (target: any, key) => {
    // FIXME property metadata is not inherited
    // Consider retrieving it inside the initializer using the instance and not
    // the class.
    const meta = getPropertyMetaOrCreate<T>(target, key);
    addInitializer(target, (instance: any) => {
      let initial: SignalValue<T> = meta.default!;
      const defaultMethod = instance[`getDefault${capitalize(key as string)}`];
      if (defaultMethod) {
        initial = () => defaultMethod.call(instance, meta.default);
      }

      const signal = new SignalContext<T, T, any>(
        initial,
        meta.interpolationFunction ?? deepLerp,
        instance,
        meta.parser?.bind(instance),
        makeSignalExtensions(meta, instance, <string>key),
      );
      instance[key] = signal.toSignal();
    });
  };
}

/**
 * Create an initial signal value decorator.