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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <type_traits>
namespace mongo {
template <typename Enum>
struct EnableBitMaskOperators {
static const bool enable = false;
};
template <typename Enum>
typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum>::type operator&(Enum lhs,
Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<Enum>(static_cast<underlying>(lhs) & static_cast<underlying>(rhs));
}
template <typename Enum>
typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum>::type operator|(Enum lhs,
Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<Enum>(static_cast<underlying>(lhs) | static_cast<underlying>(rhs));
}
template <typename Enum>
typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum>::type operator^(Enum lhs,
Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
return static_cast<Enum>(static_cast<underlying>(lhs) ^ static_cast<underlying>(rhs));
}
template <typename Enum>
typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum>::type operator~(Enum rhs) {
return static_cast<Enum>(~static_cast<typename std::underlying_type<Enum>::type>(rhs));
}
template <typename Enum>
typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum&>::type operator|=(Enum& lhs,
Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
lhs = static_cast<Enum>(static_cast<underlying>(lhs) | static_cast<underlying>(rhs));
return lhs;
}
template <typename Enum>
typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum&>::type operator&=(Enum& lhs,
Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
lhs = static_cast<Enum>(static_cast<underlying>(lhs) & static_cast<underlying>(rhs));
return lhs;
}
template <typename Enum>
typename std::enable_if<EnableBitMaskOperators<Enum>::enable, Enum&>::type operator^=(Enum& lhs,
Enum rhs) {
using underlying = typename std::underlying_type<Enum>::type;
lhs = static_cast<Enum>(static_cast<underlying>(lhs) ^ static_cast<underlying>(rhs));
return lhs;
}
} // namespace mongo
#define ENABLE_BITMASK_OPERATORS(x) \
\
template <> \
\
struct EnableBitMaskOperators<x> { \
static_assert(std::is_enum<x>::value, "template parameter is not an enum type"); \
static const bool enable = true; \
};
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