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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QCoreApplication>
#include <QDebug>
#include <QVariant>
//message.h
//! [custom type definition]
class Message
{
public:
Message() = default;
~Message() = default;
Message(const Message &) = default;
Message &operator=(const Message &) = default;
Message(const QString &body, const QStringList &headers);
QStringView body() const;
QStringList headers() const;
private:
QString m_body;
QStringList m_headers;
};
//! [custom type definition]
//! [custom type meta-type declaration]
Q_DECLARE_METATYPE(Message);
//! [custom type meta-type declaration]
//! [custom type streaming operator declaration]
QDebug operator<<(QDebug dbg, const Message &message);
//! [custom type streaming operator declaration]
// message.cpp
//! [custom type streaming operator]
QDebug operator<<(QDebug dbg, const Message &message)
{
const QList<QStringView> pieces = message.body().split(u"\r\n", Qt::SkipEmptyParts);
if (pieces.isEmpty())
dbg.nospace() << "Message()";
else if (pieces.size() == 1)
dbg.nospace() << "Message(" << pieces.first() << ")";
else
dbg.nospace() << "Message(" << pieces.first() << " ...)";
return dbg;
}
//! [custom type streaming operator]
//! [getter functions]
QStringView Message::body() const
{
return m_body;
}
QStringList Message::headers() const
{
return m_headers;
}
//! [getter functions]
//main.cpp
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
QStringList headers;
headers << "Subject: Hello World"
<< "From: address@example.com";
QString body = "This is a test.\r\n";
//! [printing a custom type]
Message message(body, headers);
qDebug() << "Original:" << message;
//! [printing a custom type]
//! [storing a custom value]
QVariant stored;
stored.setValue(message);
//! [storing a custom value]
qDebug() << "Stored:" << stored;
//! [retrieving a custom value]
Message retrieved = qvariant_cast<Message>(stored);
qDebug() << "Retrieved:" << retrieved;
retrieved = qvariant_cast<Message>(stored);
qDebug() << "Retrieved:" << retrieved;
//! [retrieving a custom value]
return 0;
}
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