eithercont.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#pragma once
 
#include <functional>
 
namespace LC
{
namespace Util
{
    template<typename LeftSig, typename RightSig>
    class EitherCont
    {
        using Left_f = std::function<LeftSig>;
        using Right_f = std::function<RightSig>;
        Left_f Left_;
        Right_f Right_;
    public:
        EitherCont () = default;
 
        template<typename L, typename R>
        EitherCont (const L& l, const R& r)
        : Left_ { l }
        , Right_ { r }
        {
        }
 
        explicit operator bool () const
        {
            return Left_ && Right_;
        }
 
        template<typename... Args>
        auto Left (Args&&... args) const
        {
            return Left_ (std::forward<Args> (args)...);
        }
 
        template<typename... Args>
        auto Right (Args&&... args) const
        {
            return Right_ (std::forward<Args> (args)...);
        }
    };
}
}