misc/bitwise_enum.hpp at master · KHeresy/misc · GitHub

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#pragma once
#include <type_traits>

template<typename TEnumType>
struct support_bitwise_enum : std::false_type {};

template<typename TEnumType>
typename std::enable_if_t<support_bitwise_enum<TEnumType>::value, TEnumType>
operator&(TEnumType left, TEnumType right)
{
	return static_cast<TEnumType>(
		static_cast<std::underlying_type_t<TEnumType>>(left) &
		static_cast<std::underlying_type_t<TEnumType>>(right));
}

template<typename TEnumType>
typename std::enable_if_t<support_bitwise_enum<TEnumType>::value, TEnumType>
operator|(TEnumType left, TEnumType right)
{
	return static_cast<TEnumType>(
		static_cast<std::underlying_type_t<TEnumType>>(left) |
		static_cast<std::underlying_type_t<TEnumType>>(right));
}

template<typename TEnumType>
typename std::enable_if_t<support_bitwise_enum<TEnumType>::value, TEnumType>
operator^(TEnumType left, TEnumType right)
{
	return static_cast<TEnumType>(
		static_cast<std::underlying_type_t<TEnumType>>(left) ^
		static_cast<std::underlying_type_t<TEnumType>>(right));
}

template<typename TEnumType>
typename std::enable_if_t<support_bitwise_enum<TEnumType>::value, TEnumType>
operator~(TEnumType value)
{
	return static_cast<TEnumType>(
		~static_cast<std::underlying_type_t<TEnumType>>(value));
}

template<typename TEnumType>
typename std::enable_if_t<support_bitwise_enum<TEnumType>::value, TEnumType>
operator&=(TEnumType& left, TEnumType right)
{
	left = left & right;
	return left;
}

template<typename TEnumType>
typename std::enable_if_t<support_bitwise_enum<TEnumType>::value, TEnumType>
operator|=(TEnumType& left, TEnumType right)
{
	left = left | right;
	return left;
}

template<typename TEnumType>
typename std::enable_if_t<support_bitwise_enum<TEnumType>::value, TEnumType>
operator^=(TEnumType& left, TEnumType right)
{
	left = left ^ right;
	return left;
}