Method First

src/NodeRTLib/ProjectFiles/CollectionsWrap.h:1823–1864

  }

  static void First(Nan::NAN_METHOD_ARGS_TYPE info) {
    HandleScope scope;

    if (!NodeRT::Utils::IsWinRtWrapperOf<
            ::Windows::Foundation::Collections::IMap<K, V> ^>(info.This())) {
      return;
    }

    MapWrapper<K, V>* wrapper =
        MapWrapper<K, V>::Unwrap<MapWrapper<K, V>>(info.This());

    if (info.Length() == 0) {
      try {
        const std::function<Local<Value>(K)>& keyGetter =
            wrapper->_keyGetterFunc;
        const std::function<Local<Value>(V)>& valueGetter =
            wrapper->_valueGetterFunc;
        info.GetReturnValue().Set(
            IteratorWrapper<
                ::Windows::Foundation::Collections::IKeyValuePair<K, V> ^>::
                CreateIteratorWrapper(
                    wrapper->_instance->First(),
                    [keyGetter, valueGetter](
                        ::Windows::Foundation::Collections::IKeyValuePair<K,
                                                                          V> ^
                        value) {
                      return KeyValuePairWrapper<
                          K, V>::CreateKeyValuePairWrapper(value, keyGetter,
                                                           valueGetter);
                    }));
      } catch (Platform::Exception ^ exception) {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
        return;
      }
    } else {
      Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(
          L"Bad arguments: no suitable overload found")));
      return;
    }

    return;
  }

  static void Lookup(Nan::NAN_METHOD_ARGS_TYPE info) {
    HandleScope scope;