DtEnumClassFlag.h

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/***************************************************************************
** Copyright (c) 2024 MAK Technologies, Inc.
** All rights reserved
***************************************************************************/


#pragma once

// Intentionally undefined for non-enum types.
template <typename T, bool = std::is_enum<T>::value>
struct is_flag;

template <typename T>
struct is_flag<T, true> : std::false_type { };

template <typename T, typename std::enable_if<is_flag<T>::value>::type* = nullptr>
T operator |(T lhs, T rhs) {
   using u_t = typename std::underlying_type<T>::type;
   return static_cast<T>(static_cast<u_t>(lhs) | static_cast<u_t>(rhs));
}

template <typename T, typename std::enable_if<is_flag<T>::value>::type* = nullptr>
T operator &(T lhs, T rhs) {
   using u_t = typename std::underlying_type<T>::type;
   return static_cast<T>(static_cast<u_t>(lhs) & static_cast<u_t>(rhs));
}