- Qt 5.15
- Qt Core
- C++ Classes
- QMessageLogContext
- Qt 5.15.18 Reference Documentation

# QMessageLogContext Class

The QMessageLogContext class provides additional information about a log message. More...

Header: | #include <QMessageLogContext>
qmake: | QT += core
Since: | Qt 5.0

This class was introduced in Qt 5.0.

## Detailed Description

The class provides information about the source code location a qDebug(), qInfo(), qWarning(), qCritical() or qFatal() message was generated.

Note: By default, this information is recorded only in debug builds. You can overwrite this explicitly by defining `QT_MESSAGELOGCONTEXT` or `QT_NO_MESSAGELOGCONTEXT`.

See also QMessageLogger, QtMessageHandler, and qInstallMessageHandler().