added iOS source code

[wl-app.git] / iOS / Pods / Realm / include / impl / notification_wrapper.hpp

diff --git a/iOS/Pods/Realm/include/impl/notification_wrapper.hpp b/iOS/Pods/Realm/include/impl/notification_wrapper.hpp
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+++ b/iOS/Pods/Realm/include/impl/notification_wrapper.hpp
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+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2017 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+#ifndef REALM_OS_NOTIFICATION_WRAPPER_HPP
+#define REALM_OS_NOTIFICATION_WRAPPER_HPP
+
+#include "collection_notifications.hpp"
+
+namespace realm {
+namespace _impl {
+
+// A wrapper that stores a value and an associated notification token.
+// The point of this type is to keep the notification token alive
+// until the value can be properly processed or handled.
+template<typename T>
+struct NotificationWrapper : public T {
+    using T::T;
+
+    NotificationWrapper(T&& object)
+    : T(object)
+    { }
+
+    template <typename F>
+    void add_notification_callback(F&& callback)
+    {
+        m_token = T::add_notification_callback(std::forward<F>(callback));
+    }
+
+private:
+    NotificationToken m_token;
+};
+
+} // namespace _impl
+} // namespace realm
+
+#endif // REALM_OS_NOTIFICATION_WRAPPER_HPP