feat add rxcpp

3party/rxcpp/operators/rx-ignore_elements.hpp

@@ -0,0 +1,114 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#pragma once
+
+/*! \file rx-ignore_elements.hpp
+
+    \brief Do not emit any items from the source Observable, but allow termination notification (either onError or onCompleted) to pass through unchanged.
+
+    \return Observable that emits termination notification from the source observable.
+
+    \sample
+    \snippet ignore_elements.cpp ignore_elements sample
+    \snippet output.txt ignore_elements sample
+*/
+
+#if !defined(RXCPP_OPERATORS_RX_IGNORE_ELEMENTS_HPP)
+#define RXCPP_OPERATORS_RX_IGNORE_ELEMENTS_HPP
+
+#include "../rx-includes.hpp"
+
+namespace rxcpp {
+
+namespace operators {
+
+namespace detail {
+
+template<class... AN>
+struct ignore_elements_invalid_arguments {};
+
+template<class... AN>
+struct ignore_elements_invalid : public rxo::operator_base<ignore_elements_invalid_arguments<AN...>> {
+    using type = observable<ignore_elements_invalid_arguments<AN...>, ignore_elements_invalid<AN...>>;
+};
+template<class... AN>
+using ignore_elements_invalid_t = typename ignore_elements_invalid<AN...>::type;
+
+template<class T>
+struct ignore_elements {
+    typedef rxu::decay_t<T> source_value_type;
+
+    template<class Subscriber>
+    struct ignore_elements_observer
+    {
+        typedef ignore_elements_observer<Subscriber> this_type;
+        typedef source_value_type value_type;
+        typedef rxu::decay_t<Subscriber> dest_type;
+        typedef observer<value_type, this_type> observer_type;
+        dest_type dest;
+
+        ignore_elements_observer(dest_type d)
+            : dest(d)
+        {
+        }
+
+        void on_next(source_value_type) const {
+            // no-op; ignore element
+        }
+
+        void on_error(rxu::error_ptr e) const {
+            dest.on_error(e);
+        }
+
+        void on_completed() const {
+            dest.on_completed();
+        }
+
+        static subscriber<value_type, observer_type> make(dest_type d) {
+            return make_subscriber<value_type>(d, this_type(d));
+        }
+    };
+
+    template<class Subscriber>
+    auto operator()(Subscriber dest) const
+        -> decltype(ignore_elements_observer<Subscriber>::make(std::move(dest))) {
+        return      ignore_elements_observer<Subscriber>::make(std::move(dest));
+    }
+};
+
+}
+
+/*! @copydoc rx-ignore_elements.hpp
+*/
+template<class... AN>
+auto ignore_elements(AN&&... an)
+->     operator_factory<ignore_elements_tag, AN...> {
+    return operator_factory<ignore_elements_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
+}
+
+}
+
+template<>
+struct member_overload<ignore_elements_tag>
+{
+    template<class Observable,
+            class SourceValue = rxu::value_type_t<Observable>,
+            class Enabled = rxu::enable_if_all_true_type_t<
+                is_observable<Observable>>,
+            class IgnoreElements = rxo::detail::ignore_elements<SourceValue>>
+    static auto member(Observable&& o)
+    -> decltype(o.template lift<SourceValue>(IgnoreElements())) {
+        return  o.template lift<SourceValue>(IgnoreElements());
+    }
+
+    template<class... AN>
+    static operators::detail::ignore_elements_invalid_t<AN...> member(AN...) {
+        std::terminate();
+        return {};
+        static_assert(sizeof...(AN) == 10000, "ignore_elements takes no arguments");
+    }
+};
+
+}
+
+#endif