bitflags.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 <type_traits>
 
namespace LC::Util
{
    template<typename T>
    class BitFlags
    {
        static_assert (std::is_enum_v<T>, "The instantiating type should be a enumeration");
 
        using St_t = std::underlying_type_t<T>;
        St_t Storage_ = 0;
    public:
        BitFlags () = default;
 
        explicit (false) 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& (BitFlags left, BitFlags right)
        {
            left &= right;
            return left;
        }
 
        friend BitFlags operator| (BitFlags left, BitFlags right)
        {
            left |= right;
            return left;
        }
    };
}
 
#define DECLARE_BIT_FLAGS(F) \
        inline LC::Util::BitFlags<F> operator& (F left, F right) \
        { \
            return LC::Util::BitFlags<F> { left } & right; \
        } \
        inline LC::Util::BitFlags<F> operator| (F left, F right) \
        { \
            return LC::Util::BitFlags<F> { left } | right; \
        }