main.cpp

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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
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#include <QCoreApplication>
#include <QLoggingCategory>
 
#ifdef Q_CC_GNU
#define NEVER_INLINE __attribute__((__noinline__))
#else
#define NEVER_INLINE
#endif
 
struct T {
    T() { qDebug("static constructor"); }
    ~T() { qDebug("static destructor"); }
} t;
 
class MyClass : public QObject
{
    Q_OBJECT
public slots:
    virtual NEVER_INLINE QString mySlot1();
private:
    virtual NEVER_INLINE void myFunction(int a);
};
 
QString MyClass::mySlot1()
{
    myFunction(34);
    return QString();
}
 
void MyClass::myFunction(int a)
{
    qDebug() << "from_a_function" << a;
}
 
int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);
    app.setApplicationName("tst_qlogging");
 
    qSetMessagePattern("[%{type}] %{message}");
 
    qDebug("qDebug");
    qInfo("qInfo");
    qWarning("qWarning");
    qCritical("qCritical");
 
    QLoggingCategory cat("category");
    qCWarning(cat) << "qDebug with category";
 
    qSetMessagePattern(QString());
 
    qDebug("qDebug2");
 
    MyClass cl;
    QMetaObject::invokeMethod(&cl, "mySlot1");
 
    return 0;
}
 
#include "main.moc"