Learn what Felgo offers to help your business succeed. Start your free evaluation today! Felgo for Your Business

QUnhandledException Class

The QUnhandledException class represents an unhandled exception in a Qt Concurrent worker thread. More...

Header: #include <QUnhandledException>
CMake: find_package(Qt6 REQUIRED COMPONENTS Core)
target_link_libraries(mytarget PRIVATE Qt6::Core)
qmake: QT += core
Since: Qt 5.0
Inherits: QException

Public Functions

QUnhandledException(const QUnhandledException &other)
QUnhandledException(QUnhandledException &&other)
QUnhandledException(std::exception_ptr exception = nullptr)
QUnhandledException & operator=(const QUnhandledException &other)
std::exception_ptr exception() const
void swap(QUnhandledException &other)

Detailed Description

If a worker thread throws an exception that is not a subclass of QException, the Qt Concurrent functions will throw a QUnhandledException on the receiver thread side. The information about the actual exception that has been thrown will be saved in the QUnhandledException class and can be obtained using the exception() method. For example, you can process the exception held by QUnhandledException in the following way:

try {
    auto f = QtConcurrent::run([] { throw MyException {}; });
    // ...
} catch (const QUnhandledException &e) {
    try {
        if (e.exception())
    } catch (const MyException &ex) {
        // Process 'ex'

Inheriting from this class is not supported.

Member Function Documentation

QUnhandledException::QUnhandledException(const QUnhandledException &other)

Constructs a QUnhandledException object as a copy of other.

QUnhandledException::QUnhandledException(QUnhandledException &&other)

Move-constructs a QUnhandledException, making it point to the same object as other was pointing to.

[since 6.0] QUnhandledException::QUnhandledException(std::exception_ptr exception = nullptr)

Constructs a new QUnhandledException object. Saves the pointer to the actual exception object if exception is passed.

This function was introduced in Qt 6.0.

See also exception().

QUnhandledException &QUnhandledException::operator=(const QUnhandledException &other)

Assigns other to this QUnhandledException object and returns a reference to this QUnhandledException object.

[since 6.0] std::exception_ptr QUnhandledException::exception() const

Returns a pointer to the actual exception that has been saved in this QUnhandledException. Returns a null pointer, if it does not point to an exception object.

This function was introduced in Qt 6.0.

[since 6.0] void QUnhandledException::swap(QUnhandledException &other)

Swaps this QUnhandledException with other. This function is very fast and never fails.

This function was introduced in Qt 6.0.

Qt_Technology_Partner_RGB_475 Qt_Service_Partner_RGB_475_padded