Function _attachContext

src/helpers/helpers.config.ts:118–195

(
  proxy: ResolverProxy<T, R>,
  context: AnyObject,
  subProxy?: ResolverProxy<T, R>,
  descriptorDefaults?: DescriptorDefaults
)

 * @private
 */
export function _attachContext<
  T extends AnyObject[] = AnyObject[],
  R extends AnyObject[] = T
>(
  proxy: ResolverProxy<T, R>,
  context: AnyObject,
  subProxy?: ResolverProxy<T, R>,
  descriptorDefaults?: DescriptorDefaults
) {
  const cache: ContextCache<T, R> = {
    _cacheable: false,
    _proxy: proxy,
    _context: context,
    _subProxy: subProxy,
    _stack: new Set(),
    _descriptors: _descriptors(proxy, descriptorDefaults),
    setContext: (ctx: AnyObject) => _attachContext(proxy, ctx, subProxy, descriptorDefaults),
    override: (scope: AnyObject) => _attachContext(proxy.override(scope), context, subProxy, descriptorDefaults)
  };
  return new Proxy(cache, {
    /**
     * A trap for the delete operator.
     */
    deleteProperty(target, prop) {
      delete target[prop]; // remove from cache
      delete proxy[prop]; // remove from proxy
      return true;
    },

    /**
     * A trap for getting property values.
     */
    get(target, prop: string, receiver) {
      return _cached(target, prop,
        () => _resolveWithContext(target, prop, receiver));
    },

    /**
     * A trap for Object.getOwnPropertyDescriptor.
     * Also used by Object.hasOwnProperty.
     */
    getOwnPropertyDescriptor(target, prop) {
      return target._descriptors.allKeys
        ? Reflect.has(proxy, prop) ? {enumerable: true, configurable: true} : undefined
        : Reflect.getOwnPropertyDescriptor(proxy, prop);
    },

    /**
     * A trap for Object.getPrototypeOf.
     */
    getPrototypeOf() {
      return Reflect.getPrototypeOf(proxy);
    },

    /**
     * A trap for the in operator.
     */
    has(target, prop) {