Function createComputedObserver

src/computed-observation.js:51–63

(obj, propertyName, descriptor, observerLocator)

}

export function createComputedObserver(obj, propertyName, descriptor, observerLocator) {
  let dependencies = descriptor.get.dependencies;
  if (!(dependencies instanceof ComputedExpression)) {
    let i = dependencies.length;
    while (i--) {
      dependencies[i] = observerLocator.parser.parse(dependencies[i]);
    }
    dependencies = descriptor.get.dependencies = new ComputedExpression(propertyName, dependencies);
  }

  let scope = { bindingContext: obj, overrideContext: createOverrideContext(obj) };
  return new ExpressionObserver(scope, dependencies, observerLocator);
}