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/*
* Copyright (C) 2008-2019 TrinityCore <https://www.trinitycore.org/>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef EnumClassFlag_h__
#define EnumClassFlag_h__
#include <type_traits>
template<typename T>
class EnumClassFlag
{
static_assert(std::is_enum<T>::value, "EnumClassFlag must be used only with enums");
public:
/*implicit*/ EnumClassFlag(T value) : _value(value) { }
EnumClassFlag& operator&=(EnumClassFlag right)
{
_value = static_cast<T>(static_cast<std::underlying_type_t<T>>(_value) & static_cast<std::underlying_type_t<T>>(right._value));
return *this;
}
friend EnumClassFlag operator&(EnumClassFlag left, EnumClassFlag right)
{
return left &= right;
}
EnumClassFlag& operator|=(EnumClassFlag right)
{
_value = static_cast<T>(static_cast<std::underlying_type_t<T>>(_value) | static_cast<std::underlying_type_t<T>>(right._value));
return *this;
}
friend EnumClassFlag operator|(EnumClassFlag left, EnumClassFlag right)
{
return left |= right;
}
EnumClassFlag operator~() const
{
return static_cast<T>(~static_cast<std::underlying_type_t<T>>(_value));
}
void RemoveFlag(EnumClassFlag flag)
{
_value = static_cast<T>(static_cast<std::underlying_type_t<T>>(_value) & ~static_cast<std::underlying_type_t<T>>(flag._value));
}
bool HasFlag(T flag) const
{
return (static_cast<std::underlying_type_t<T>>(_value) & static_cast<std::underlying_type_t<T>>(flag)) != 0;
}
operator T() const
{
return _value;
}
std::underlying_type_t<T> AsUnderlyingType() const
{
return static_cast<std::underlying_type_t<T>>(_value);
}
private:
T _value;
};
#endif // EnumClassFlag_h__
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