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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2020, Google Inc.
 *
 * flags.cpp - Type-safe enum-based bitfields
 */

#include <libcamera/base/flags.h>

/**
 * \file base/flags.h
 * \brief Enum-based bit fields
 */

namespace libcamera {

/**
 * \class Flags
 * \brief Type-safe container for enum-based bitfields
 *
 * The Flags template class provides type-safe bitwise operators on enum values.
 * It allows using enum types for bitfields, while preventing unsafe casts from
 * integer types and mixing of flags from different enum types.
 *
 * To use the Flags class, declare an enum containing the desired bit flags, and
 * use the Flags<enum> class to store bitfields based on the enum. If bitwise
 * operators on the underlying enum are also desired, they can be enabled with
 * the LIBCAMERA_FLAGS_ENABLE_OPERATORS(enum) macro.
 */

/**
 * \typedef Flags::Type
 * \brief The underlying data type of the enum
 */

/**
 * \fn Flags::Flags()
 * \brief Construct a Flags instance with a zero value
 */

/**
 * \fn Flags::Flags(E flag)
 * \brief Construct a Flags instance storing the \a flag
 * \param[in] flag The initial value
 */

/**
 * \fn Flags &Flags::operator&=(E flag)
 * \brief Store the bitwise AND of this Flags and the \a flag in this Flags
 * \param[in] flag The second operand
 * \return A reference to this Flags
 */

/**
 * \fn Flags &Flags::operator&=(Flags other)
 * \brief Store the bitwise AND of this Flags and the \a other Flags in this Flags
 * \param[in] other The second operand
 * \return A reference to this Flags
 */

/**
 * \fn Flags &Flags::operator|=(E flag)
 * \brief Store the bitwise OR of this Flags and the \a flag in this Flags
 * \param[in] flag The second operand
 * \return A reference to this Flags
 */

/**
 * \fn Flags &Flags::operator|=(Flags other)
 * \brief Store the bitwise OR of this Flags and the \a other Flags in this Flags
 * \param[in] other The second operand
 * \return A reference to this Flags
 */

/**
 * \fn Flags &Flags::operator^=(E flag)
 * \brief Store the bitwise XOR of this Flags and the \a flag in this Flags
 * \param[in] flag The second operand
 * \return A reference to this Flags
 */

/**
 * \fn Flags &Flags::operator^=(Flags other)
 * \brief Store the bitwise XOR of this Flags and the \a other Flags in this Flags
 * \param[in] other The second operand
 * \return A reference to this Flags
 */

/**
 * \fn bool Flags::operator==(E flag)
 * \brief Compare flags for equality
 * \param[in] flag The second operand
 * \return True if the Flags and \a flag are equal, false otherwise
 */

/**
 * \fn bool Flags::operator==(Flags other)
 * \brief Compare flags for equality
 * \param[in] other The second operand
 * \return True if the Flags and \a other are equal, false otherwise
 */

/**
 * \fn bool Flags::operator!=(E flag)
 * \brief Compare flags for non-equality
 * \param[in] flag The second operand
 * \return True if the Flags and \a flag are not equal, false otherwise
 */

/**
 * \fn bool Flags::operator!=(Flags other)
 * \brief Compare flags for non-equality
 * \param[in] other The second operand