rx-connect_forever.hpp

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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.

#pragma once

#if !defined(RXCPP_OPERATORS_RX_CONNECT_FOREVER_HPP)
#define RXCPP_OPERATORS_RX_CONNECT_FOREVER_HPP

#include "../rx-includes.hpp"

namespace rxcpp {

namespace operators {

namespace detail {

template<class... AN>
struct connect_forever_invalid_arguments {};

template<class... AN>
struct connect_forever_invalid : public rxo::operator_base<connect_forever_invalid_arguments<AN...>> {
    using type = observable<connect_forever_invalid_arguments<AN...>, connect_forever_invalid<AN...>>;
};
template<class... AN>
using connect_forever_invalid_t = typename connect_forever_invalid<AN...>::type;

template<class T, class ConnectableObservable>
struct connect_forever : public operator_base<T>
{
    typedef rxu::decay_t<ConnectableObservable> source_type;

    source_type source;

    explicit connect_forever(source_type o)
        : source(std::move(o))
    {
        source.connect();
    }

    template<class Subscriber>
    void on_subscribe(Subscriber&& o) const {
        source.subscribe(std::forward<Subscriber>(o));
    }
};

}

template<class... AN>
auto connect_forever(AN&&... an)
->     operator_factory<connect_forever_tag, AN...> {
    return operator_factory<connect_forever_tag, AN...>(std::make_tuple(std::forward<AN>(an)...));
}

}

template<>
struct member_overload<connect_forever_tag>
{
    template<class ConnectableObservable,
        class Enabled = rxu::enable_if_all_true_type_t<
            is_connectable_observable<ConnectableObservable>>,
        class SourceValue = rxu::value_type_t<ConnectableObservable>,
        class ConnectForever = rxo::detail::connect_forever<SourceValue, rxu::decay_t<ConnectableObservable>>,
        class Value = rxu::value_type_t<ConnectForever>,
        class Result = observable<Value, ConnectForever>
        >
    static Result member(ConnectableObservable&& o) {
        return Result(ConnectForever(std::forward<ConnectableObservable>(o)));
    }

    template<class... AN>
    static operators::detail::connect_forever_invalid_t<AN...> member(AN...) {
        std::terminate();
        return {};
        static_assert(sizeof...(AN) == 10000, "connect_forever takes no arguments");
    }
};

}

#endif