feat add rxcpp

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

@@ -0,0 +1,182 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#pragma once
+
+/*! \file rx-all.hpp
+
+    \brief Returns an Observable that emits true if every item emitted by the source Observable satisfies a specified condition, otherwise false.
+           Emits true if the source Observable terminates without emitting any item.
+
+    \tparam Predicate  the type of the test function.
+
+    \param p  the test function to test items emitted by the source Observable.
+
+    \return  Observable that emits true if every item emitted by the source observable satisfies a specified condition, otherwise false.
+
+    \sample
+    \snippet all.cpp all sample
+    \snippet output.txt all sample
+*/
+
+#if !defined(RXCPP_OPERATORS_RX_ALL_HPP)
+#define RXCPP_OPERATORS_RX_ALL_HPP
+
+#include "../rx-includes.hpp"
+
+namespace rxcpp {
+
+namespace operators {
+
+namespace detail {
+
+template<class... AN>
+struct all_invalid_arguments {};
+
+template<class... AN>
+struct all_invalid : public rxo::operator_base<all_invalid_arguments<AN...>> {
+    using type = observable<all_invalid_arguments<AN...>, all_invalid<AN...>>;
+};
+template<class... AN>
+using all_invalid_t = typename all_invalid<AN...>::type;
+
+template<class T, class Predicate>
+struct all
+{
+    typedef rxu::decay_t<T> source_value_type;
+    typedef rxu::decay_t<Predicate> test_type;
+    test_type test;
+
+    typedef bool value_type;
+
+    all(test_type t)
+        : test(std::move(t))
+    {
+    }
+
+    template<class Subscriber>
+    struct all_observer
+    {
+        typedef all_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;
+        test_type test;
+        mutable bool done;
+
+        all_observer(dest_type d, test_type t)
+            : dest(std::move(d))
+            , test(std::move(t)),
+              done(false)
+        {
+        }
+        void on_next(source_value_type v) const {
+            auto filtered = on_exception([&]() {
+                return !this->test(v); },
+                dest);
+            if (filtered.empty()) {
+                return;
+            }
+            if (filtered.get() && !done) {
+                done = true;
+                dest.on_next(false);
+                dest.on_completed();
+            }
+        }
+        void on_error(rxu::error_ptr e) const {
+            dest.on_error(e);
+        }
+        void on_completed() const {
+            if(!done) {
+                done = true;
+                dest.on_next(true);
+                dest.on_completed();
+            }
+        }
+
+        static subscriber<value_type, observer_type> make(dest_type d, test_type t) {
+            return make_subscriber<value_type>(d, this_type(d, std::move(t)));
+        }
+    };
+
+    template<class Subscriber>
+    auto operator()(Subscriber dest) const
+        -> decltype(all_observer<Subscriber>::make(std::move(dest), test)) {
+        return      all_observer<Subscriber>::make(std::move(dest), test);
+    }
+};
+
+}
+
+/*! @copydoc rx-all.hpp
+*/
+template<class... AN>
+auto all(AN&&... an)
+    ->     operator_factory<all_tag, AN...> {
+    return operator_factory<all_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
+}
+
+/*! \brief Returns an Observable that emits true if the source Observable is empty, otherwise false.
+
+    \return An observable that emits a boolean value.
+
+    \sample
+    \snippet is_empty.cpp is_empty sample
+    \snippet output.txt is_empty sample
+*/
+template<class... AN>
+auto is_empty(AN&&... an)
+->     operator_factory<is_empty_tag, AN...> {
+    return operator_factory<is_empty_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
+}
+
+}
+
+template<>
+struct member_overload<all_tag>
+{
+    template<class Observable, class Predicate,
+        class SourceValue = rxu::value_type_t<Observable>,
+        class Enabled = rxu::enable_if_all_true_type_t<
+            is_observable<Observable>>,
+        class All = rxo::detail::all<SourceValue, rxu::decay_t<Predicate>>,
+        class Value = rxu::value_type_t<All>>
+    static auto member(Observable&& o, Predicate&& p)
+        -> decltype(o.template lift<Value>(All(std::forward<Predicate>(p)))) {
+        return      o.template lift<Value>(All(std::forward<Predicate>(p)));
+    }
+
+    template<class... AN>
+    static operators::detail::all_invalid_t<AN...> member(const AN&...) {
+        std::terminate();
+        return {};
+        static_assert(sizeof...(AN) == 10000, "all takes (Predicate)");
+    }
+};
+
+template<>
+struct member_overload<is_empty_tag>
+{
+    template<class Observable,
+        class SourceValue = rxu::value_type_t<Observable>,
+        class Enabled = rxu::enable_if_all_true_type_t<
+            is_observable<Observable>>,
+        class Predicate = std::function<bool(SourceValue)>,
+        class IsEmpty = rxo::detail::all<SourceValue, rxu::decay_t<Predicate>>,
+        class Value = rxu::value_type_t<IsEmpty>>
+    static auto member(Observable&& o)
+    -> decltype(o.template lift<Value>(IsEmpty(nullptr))) {
+        return  o.template lift<Value>(IsEmpty([](SourceValue) { return false; }));
+    }
+
+    template<class... AN>
+    static operators::detail::all_invalid_t<AN...> member(AN...) {
+        std::terminate();
+        return {};
+        static_assert(sizeof...(AN) == 10000, "is_empty takes no arguments");
+    }
+};
+
+}
+
+#endif