monadicfuture.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
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 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
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#pragma once
 
#include <QFuture>
#include <util/sll/functor.h>
#include <util/sll/monad.h>
#include "futures.h"
 
namespace LC
{
namespace Util
{
    template<typename T>
    struct InstanceFunctor<QFuture<T>>
    {
        template<typename F>
        using FmapResult_t = QFuture<std::decay_t<std::result_of_t<F (T)>>>;
 
        template<typename F>
        static FmapResult_t<F> Apply (const QFuture<T>& fut, const F& func)
        {
            return Sequence (nullptr, fut) >>
                    [func] (const T& val) { return MakeReadyFuture (func (val)); };
        }
    };
}
}