feat add rxcpp

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

@@ -0,0 +1,150 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#pragma once
+
+/*! \file rx-timestamp.hpp
+
+    \brief Returns an observable that attaches a timestamp to each item emitted by the source observable indicating when it was emitted.
+
+    \tparam Coordination  the type of the scheduler (optional).
+
+    \param coordination  the scheduler to manage timeout for each event (optional).
+
+    \return  Observable that emits a pair: { item emitted by the source observable, time_point representing the current value of the clock }.
+
+    \sample
+    \snippet timestamp.cpp timestamp sample
+    \snippet output.txt timestamp sample
+*/
+
+#if !defined(RXCPP_OPERATORS_RX_TIMESTAMP_HPP)
+#define RXCPP_OPERATORS_RX_TIMESTAMP_HPP
+
+#include "../rx-includes.hpp"
+
+namespace rxcpp {
+
+namespace operators {
+
+namespace detail {
+
+template<class... AN>
+struct timestamp_invalid_arguments {};
+
+template<class... AN>
+struct timestamp_invalid : public rxo::operator_base<timestamp_invalid_arguments<AN...>> {
+    using type = observable<timestamp_invalid_arguments<AN...>, timestamp_invalid<AN...>>;
+};
+template<class... AN>
+using timestamp_invalid_t = typename timestamp_invalid<AN...>::type;
+
+template<class T, class Coordination>
+struct timestamp
+{
+    typedef rxu::decay_t<T> source_value_type;
+    typedef rxu::decay_t<Coordination> coordination_type;
+
+    struct timestamp_values {
+        timestamp_values(coordination_type c)
+            : coordination(c)
+        {
+        }
+
+        coordination_type coordination;
+    };
+    timestamp_values initial;
+
+    timestamp(coordination_type coordination)
+        : initial(coordination)
+    {
+    }
+
+    template<class Subscriber>
+    struct timestamp_observer
+    {
+        typedef timestamp_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;
+        coordination_type coord;
+
+        timestamp_observer(dest_type d, coordination_type coordination)
+            : dest(std::move(d)),
+              coord(std::move(coordination))
+        {
+        }
+
+        void on_next(source_value_type v) const {
+            dest.on_next(std::make_pair(v, coord.now()));
+        }
+        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, timestamp_values v) {
+            return make_subscriber<value_type>(d, this_type(d, v.coordination));
+        }
+    };
+
+    template<class Subscriber>
+    auto operator()(Subscriber dest) const
+        -> decltype(timestamp_observer<Subscriber>::make(std::move(dest), initial)) {
+        return      timestamp_observer<Subscriber>::make(std::move(dest), initial);
+    }
+};
+
+}
+
+/*! @copydoc rx-timestamp.hpp
+*/
+template<class... AN>
+auto timestamp(AN&&... an)
+    ->      operator_factory<timestamp_tag, AN...> {
+     return operator_factory<timestamp_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
+}
+
+}
+
+template<>
+struct member_overload<timestamp_tag>
+{
+    template<class Observable,
+        class Enabled = rxu::enable_if_all_true_type_t<
+            is_observable<Observable>>,
+        class SourceValue = rxu::value_type_t<Observable>,
+        class Timestamp = rxo::detail::timestamp<SourceValue, identity_one_worker>,
+        class Clock = typename rxsc::scheduler::clock_type::time_point,
+        class Value = std::pair<SourceValue, Clock>>
+    static auto member(Observable&& o)
+        -> decltype(o.template lift<Value>(Timestamp(identity_current_thread()))) {
+        return      o.template lift<Value>(Timestamp(identity_current_thread()));
+    }
+
+    template<class Observable, class Coordination,
+        class Enabled = rxu::enable_if_all_true_type_t<
+            is_observable<Observable>,
+            is_coordination<Coordination>>,
+        class SourceValue = rxu::value_type_t<Observable>,
+        class Timestamp = rxo::detail::timestamp<SourceValue, rxu::decay_t<Coordination>>,
+        class Clock = typename rxsc::scheduler::clock_type::time_point,
+        class Value = std::pair<SourceValue, Clock>>
+    static auto member(Observable&& o, Coordination&& cn)
+        -> decltype(o.template lift<Value>(Timestamp(std::forward<Coordination>(cn)))) {
+        return      o.template lift<Value>(Timestamp(std::forward<Coordination>(cn)));
+    }
+
+    template<class... AN>
+    static operators::detail::timestamp_invalid_t<AN...> member(AN...) {
+        std::terminate();
+        return {};
+        static_assert(sizeof...(AN) == 10000, "timestamp takes (optional Coordination)");
+    }
+};
+
+}
+
+#endif