ladybird/AK/EnumBits.h

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/*
* Copyright (c) 2021, Brian Gianforcaro <bgianf@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "AK/StdLibExtras.h"
// Enables bitwise operators for the specified Enum type.
//
#define AK_ENUM_BITWISE_OPERATORS(Enum) \
_AK_ENUM_BITWISE_OPERATORS_INTERNAL(Enum, )
// Enables bitwise operators for the specified Enum type, this
// version is meant for use on enums which are private to the
// containing type.
//
#define AK_ENUM_BITWISE_FRIEND_OPERATORS(Enum) \
_AK_ENUM_BITWISE_OPERATORS_INTERNAL(Enum, friend)
#define _AK_ENUM_BITWISE_OPERATORS_INTERNAL(Enum, Prefix) \
\
[[nodiscard]] Prefix constexpr Enum operator|(Enum lhs, Enum rhs) \
{ \
using Type = UnderlyingType<Enum>; \
return static_cast<Enum>( \
static_cast<Type>(lhs) | static_cast<Type>(rhs)); \
} \
\
[[nodiscard]] Prefix constexpr Enum operator&(Enum lhs, Enum rhs) \
{ \
using Type = UnderlyingType<Enum>; \
return static_cast<Enum>( \
static_cast<Type>(lhs) & static_cast<Type>(rhs)); \
} \
\
[[nodiscard]] Prefix constexpr Enum operator^(Enum lhs, Enum rhs) \
{ \
using Type = UnderlyingType<Enum>; \
return static_cast<Enum>( \
static_cast<Type>(lhs) ^ static_cast<Type>(rhs)); \
} \
\
[[nodiscard]] Prefix constexpr Enum operator~(Enum rhs) \
{ \
using Type = UnderlyingType<Enum>; \
return static_cast<Enum>( \
~static_cast<Type>(rhs)); \
} \
\
Prefix constexpr Enum& operator|=(Enum& lhs, Enum rhs) \
{ \
using Type = UnderlyingType<Enum>; \
lhs = static_cast<Enum>( \
static_cast<Type>(lhs) | static_cast<Type>(rhs)); \
return lhs; \
} \
\
Prefix constexpr Enum& operator&=(Enum& lhs, Enum rhs) \
{ \
using Type = UnderlyingType<Enum>; \
lhs = static_cast<Enum>( \
static_cast<Type>(lhs) & static_cast<Type>(rhs)); \
return lhs; \
} \
\
Prefix constexpr Enum& operator^=(Enum& lhs, Enum rhs) \
{ \
using Type = UnderlyingType<Enum>; \
lhs = static_cast<Enum>( \
static_cast<Type>(lhs) ^ static_cast<Type>(rhs)); \
return lhs; \
} \
\
Prefix constexpr bool has_flag(Enum value, Enum mask) \
{ \
using Type = UnderlyingType<Enum>; \
return static_cast<Type>(value & mask) == static_cast<Type>(mask); \
}