bitflags.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
 * do so, all subject to the following:
 *
 * 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
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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#pragma once

namespace LeechCraft
{
namespace Util
{
    template<typename T>
    class BitFlags
    {
        using St_t = std::underlying_type_t<T>;
        St_t Storage_ = 0;
    public:
        BitFlags () = default;

        BitFlags (T t)
                : Storage_ { static_cast<St_t> (t) }
        {
        }

        explicit operator bool () const
        {
            return Storage_;
        }

        BitFlags& operator&= (BitFlags other)
        {
            Storage_ &= other.Storage_;
            return *this;
        }

        BitFlags& operator|= (BitFlags other)
        {
            Storage_ |= other.Storage_;
            return *this;
        }

        friend BitFlags operator& (const BitFlags& left, const BitFlags& right)
        {
            BitFlags res { left };
            res &= right;
            return res;
        }

        friend BitFlags operator| (const BitFlags& left, const BitFlags& right)
        {
            BitFlags res { left };
            res |= right;
            return res;
        }
    };
}
}

#define DECLARE_BIT_FLAGS(F) \
        LeechcRaft::Util::BitFlags<F> operator& (F left, F right) \
        { \
            return LeechcRaft::Util::BitFlags<F> { left } & right; \
        } \
        LeechcRaft::Util::BitFlags<F> operator| (F left, F right) \
        { \
            return LeechcRaft::Util::BitFlags<F> { left } | right; \
        }