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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef PROTOBUFFIELDPRESENCECHECKER_P_H
#define PROTOBUFFIELDPRESENCECHECKER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtProtobuf/qtprotobuftypes.h>
#include <QtCore/qtconfigmacros.h>
#include <QtCore/qxptype_traits.h>
#include <type_traits>
QT_BEGIN_NAMESPACE
namespace ProtobufFieldPresenceChecker
{
template <typename T>
using HasIsEmpty = decltype(&T::isEmpty);
template <typename T>
using has_is_empty_method = qxp::is_detected<HasIsEmpty, T>;
template <typename T>
constexpr inline bool IsProtobufTrivialScalarValueType = false;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::int32> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::int64> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::sint32> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::sint64> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::uint32> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::uint64> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::fixed32> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::fixed64> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::sfixed32> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::sfixed64> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<float> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<double> = true;
template <>
constexpr inline bool IsProtobufTrivialScalarValueType<QtProtobuf::boolean> = true;
using Function = bool (*)(const QVariant &);
template <typename T, std::enable_if_t<IsProtobufTrivialScalarValueType<T>, bool> = true>
static bool isPresent(const QVariant &value)
{
return value.value<T>() != T{};
}
template <typename T, std::enable_if_t<has_is_empty_method<T>::value, bool> = true>
static bool isPresent(const QVariant &value)
{
return !value.value<T>().isEmpty();
}
}
QT_END_NAMESPACE
#endif // PROTOBUFFIELDPRESENCECHECKER_P_H