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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QJsonObject>
#include <QMetaType>
#include <QString>
int main() {
//! [member]
struct Coordinates {
int x;
int y;
int z;
QString toString() const { return u"[x: %1; y: %2, z: %3]"_s.arg(QString::number(x),
QString::number(y),
QString::number(z)); }
};
QMetaType::registerConverter<Coordinates, QString>(&Coordinates::toString);
//! [member]
//! [memberOk]
struct BigNumber {
long long l;
int toInt(bool *ok = nullptr) const {
const bool canConvertSafely = l < std::numeric_limits<int>::max();
if (ok)
*ok = canConvertSafely;
return l;
}
};
QMetaType::registerConverter<BigNumber, int>(&BigNumber::toInt);
//! [memberOk]
//! [implicit]
class Counter {
int number = 0;
public:
int value() const { return number; }
operator int() const { return value(); }
void increment() {++number;}
};
QMetaType::registerConverter<Counter, int>();
//! [implicit]
struct CustomStringType {
const char *data() const {return nullptr;}
};
//! [unaryfunc]
QMetaType::registerConverter<CustomStringType, QString>([](const CustomStringType &str) {
return QString::fromUtf8(str.data());
});
QMetaType::registerConverter<QJsonValue, QPointF>(
[](const QJsonValue &value) -> std::optional<QPointF> {
const auto object = value.toObject();
if (!object.contains("x") || !object.contains("y"))
return std::nullopt; // The conversion fails if the required properties are missing
return QPointF{object["x"].toDouble(), object["y"].toDouble()};
});
//! [unaryfunc]
}
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