feat add rxcpp

3party/rxcpp/sources/rx-empty.hpp

@@ -0,0 +1,53 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#pragma once
+
+#if !defined(RXCPP_SOURCES_RX_EMPTY_HPP)
+#define RXCPP_SOURCES_RX_EMPTY_HPP
+
+#include "../rx-includes.hpp"
+
+/*! \file rx-empty.hpp
+
+    \brief Returns an observable that sends no items to observer and immediately completes, on the specified scheduler.
+
+    \tparam T             the type of (not) emitted items
+    \tparam Coordination  the type of the scheduler (optional)
+
+    \param  cn  the scheduler to use for scheduling the items (optional)
+
+    \return  Observable that sends no items to observer and immediately completes.
+
+    \sample
+    \snippet empty.cpp empty sample
+    \snippet output.txt empty sample
+
+    \sample
+    \snippet empty.cpp threaded empty sample
+    \snippet output.txt threaded empty sample
+*/
+
+namespace rxcpp {
+
+namespace sources {
+
+/*! @copydoc rx-empty.hpp
+ */
+template<class T>
+auto empty()
+    -> decltype(from<T>()) {
+    return      from<T>();
+}
+/*! @copydoc rx-empty.hpp
+ */
+template<class T, class Coordination>
+auto empty(Coordination cn)
+    -> decltype(from<T>(std::move(cn))) {
+    return      from<T>(std::move(cn));
+}
+
+}
+
+}
+
+#endif