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QCoro 0.8.0 Release Announcement

This is a rather small release with only two new features and one small improvement.

Big thank you to Xstrahl Inc. who sponsored development of new features included in this release and of QCoro in general.

And as always, thank you to everyone who reported issues and contributed to QCoro. Your help is much appreciated!

Improved QCoro::waitFor()

Up until this version, QCoro::waitFor() was only usable for QCoro::Task<T>. Starting with QCoro 0.8.0, it is possible to use it with any type that satisfies the Awaitable concept. The concept has also been fixed to satisfies not just types with the await_resume(), await_suspend() and await_ready() member functions, but also types with member operator co_await() and non-member operator co_await() functions.

QCoro::sleepFor() and QCoro::sleepUntil()

Working both on QCoro codebase as well as some third-party code bases using QCoro it's clear that there's a usecase for a simple coroutine that will sleep for specified amount of time (or until a specified timepoint). It is especially useful in tests, where simulating delays, especially in asynchronous code is common.

Previously I used to create small coroutines like this:

QCoro::Task<> timer(std::chrono::milliseconds timeout) {
    QTimer timer;
    co_await timer;

Now we can do the same simply by using QCoro::sleepFor().

Read the documentation for QCoro::sleepFor() and QCoro::sleepUntil() for more details.


A small helper coroutine that allows a piece of function to be executed in the context of another thread.

void App::runSlowOperation(QThread *helperThread) {
    // Still on the main thread

    const QString input = ui->userInput.text();

    co_await QCoro::moveToThread(helperThread);
    // Now we are running in the context of the helper thread, the main thread is not blocked

    // It is safe to use `input` which was created in another thread

    // Move the execution back to the main thread
    co_await QCoro::moveToThread(this->thread());
    // Runs on the main thread again

Read the documentation for QCoro::moveToThread for more details.

Full changelog

See changelog on Github