monadicfuture.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 <QFuture>
#include <util/sll/functor.h>
#include "futures.h"
 
namespace LC::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)); };
        }
    };
}