Added QFuture::unwrap() for unwrapping the future nested inside
QFuture<QFuture<T>>. QTBUG-86725 suggests doing the unwrapping
automatically inside .then(), but this will change the return type
of .then() that used to return QFuture<QFuture<T>> and might cause
SC breaks. Apart from that, QFuture::unwrap() might be helpful in
general, for asynchronous computations that return a nested QFuture.
[ChangeLog][QtCore][QFuture] Added QFuture::unwrap() for unwrapping the
future nested inside QFuture<QFuture<T>>.
Task-number: QTBUG-86725
Change-Id: I8886743aca261dca46f62d9dfcaead4a141d3dc4
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Skip a test that uses QProcess instead of blacklisting it.
Re-enable this test in CMakeLists.txt, so that it can be checked
in the CI.
Fixes: QTBUG-87431
Pick-to: 6.3 6.2
Change-Id: If8a4acd60735f355dffa60c28b8d07695ee33ec8
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
For x86_32 the alignment of QBasicAtomicInteger<8 bytes> is not
equal to the alignment of TypeInStruct<8 bytes>, so do not perform
the check.
Fixes: QTBUG-87422
Pick-to: 6.3 6.2
Change-Id: I6e6c6cb7b2b7195e430d6a6991004bcfce16d4cb
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
If the QPromise is being destroyed, we should signal the associated
futures to stop waiting. No matter in which state the promise is, if
it's not finished, we should always cancel to avoid infinite waits.
This is also what docs state:
"The promise implicitly transitions to a canceled state on destruction
unless finish() is called beforehand by the user."
Fixes: QTBUG-101284
Pick-to: 6.3 6.2
Change-Id: I65ebfefe03b79b41afacda78a4f49938c54d8b37
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
There is no reason to allow relock() on a locked locker, or unlock()
or an unlocked one, just like we don't allow that on a plain mutex
to begin with. The docs already said that e.g. relock() locks an
_unlocked_ locker.
[ChangeLog][QtCore][QMutexLocker] QMutexLocker allowed relock() and
unlock() on an already closed (resp. open) locker object. These
semantics have always been undocumented and are now unsupported
(in both cases they yield undefined behavior.)
Change-Id: Id5f67beb5dc30d6435dae88a3085fba93ec7d96e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
The class is similar to unique_lock in that it allows for unlocking
and relocking. Since the locked state is tracked by QMutexLocker itself,
it's trivial to make it movable.
[ChangeLog][QtCore][QMutexLocker] The class is now movable.
Change-Id: I534044f8024575e996c12efb2236761d493798a3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Connecting to nullptr, or connecting to a non-signal PMF, would result
in a QFuture which would never finish. Catch these cases and handle
them.
Windows+MSVC for some reason fails the test. I can't entirely understand
why, so I've marked it as XFAIL, with QTBUG-101761 to track it.
Change-Id: I314980e7e9b7156d8cddd3b33d5cbf1d0bcd6116
Pick-to: 6.2 6.3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
tst_QFutureWatcher was deactivated for Android. This patch activates it.
Fixes: QTBUG-88136
Change-Id: Iead82e22d73eb15c9ecd2756eb33925910bbffc0
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
qt_internal_undefine_global_definition disables an internal global
definition that is defined by the qt_internal_add_global_definition
function for a specific target.
Remove the ability to set the custom "undefine" flag for the
definitions since it's hard to control it using the introduced
function.
Pick-to: 6.2 6.3
Task-number: QTBUG-100334
Change-Id: Ic1637d97aa51bbdd06c5b191c57a941aa208d4dc
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Restore the 'QT_NO_JAVA_STYLE_ITERATORS' and
'QT_NO_NARROWING_CONVERSIONS_IN_CONNECT' definitions for Qt
targets.
Add the function that adds global definitions for Qt targets according
to the provided scope and the target property-based switch to disable
the definition for a specific target.
Pick-to: 6.2 6.3
Task-number: QTBUG-100295
Change-Id: I28697e81f9aabc45c48d79aae1e5caea141e04e1
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
If the signal passed to QtFuture::connect() takes multiple arguments,
we need to wrap the arguments in a std::tuple when reporting the result.
To detect this case we were checking if the result type of a QFuture
returned by QtFuture::connect() is a std::tuple, but this was not
correct: the result type could be a std::tuple also if the passed
signal takes a single std::tuple argument. Instead, check if the signal
takes more than one argument.
As a drive-by modified the tst_QFuture::signalConnect to use const
values for tuples used in multiple test-cases, to avoid repetition.
Fixes: QTBUG-100071
Pick-to: 6.2 6.3
Change-Id: I1ce39cf87028f36ef94a9d1a4423b0c51473afd4
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
The class is not intended for inheriting from it (see also
e502906305), so we can mark it as final
to explicitly forbid this. The tests were still using it as a base
class to clean the results during destruction, so fix them accordingly.
Task-number: QTBUG-99883
Pick-to: 6.3
Change-Id: I4a7ee3e2b462bd704e4b5a95ed733144805d6e5b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Capturing a QFuture in the continuations attached to it results in
memory leaks. QFuture's ref-counted data can only be deleted when the
last copy referencing the data gets deleted. The saved continuation
that keeps a copy of the future (as in case of the lambda capture) will
prevent the data from being deleted. So we need to manually clean the
continuation after it is run. But this doesn't solve the problem if the
continuation isn't run. In that case, clean the continuation in the
destructor of the associated QPromise.
To avoid similar leaks, internally we should always create futures via
QPromise, instead of the ref-counted QFutureInterface, so that the
continuation is always cleaned in the destructor. Currently QFuture
continuations and QtFuture::when* methods use QFutureInterface directly,
which will be fixed by the follow-up commits.
Fixes: QTBUG-99534
Pick-to: 6.3 6.2
Change-Id: Ic13e7dffd8cb25bd6b87e5416fe4d1a97af74c9b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Suppress the error:
C1128: number of sections exceeded ... limit: compile with /bigobj
Fix by setting the correct target in CMake script.
Pick-to: 6.2 6.3
Change-Id: If241fbaa70b68ca698dae2d484146e7bac970609
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Filter out the last argument of type QPrivateSignal from the signal's
arguments passed to QtFuture::connect().
Pick-to: 6.2
Fixes: QTBUG-92501
Change-Id: Idcd6baba1f01fcc94fa64b1c7030a629d01ed7a1
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
If one destroys a running QThread, so far the behavior has been to crash
(à la std::thread) -- assuming the thread hasn't already signalled that
it has finished. This behavior is hostile to solutions such as using
QThread::create(), which always require a wait() before destroying the
thread object.
We can use the opportunity to change the behavior without breaking any
valid code. Instead of crashing, inside QThread's destructor we can ask
the new thread to quit, and then join it (à la std::jthread). This
simplifies the implementation of long-living runnables and the code that
manages them.
Deploying this solution for the whole QThread class may not be entirely
painless. While no correct code would work differently with the proposed
changes, incorrect code that deletes a running thread would no longer
crash "loudly" -- instead, it might deadlock "quietly", have memory
corruptions, etc.
Hence I'm limiting this approach to only the threads created by
QThread::create(), at least for the time being. This also side-steps
perhaps the biggest problem of generalizing the approach, which is that
placing such interrupt+join logic into~QThread's destructor would cause
it to be run _after_ a QThread subclass' own destructor has run,
destroying the subclass' data members too early. This might create
an antipattern if one chooses to subclass QThread. With create(), a
subclass in question exists, and it indeed has NSDMs, but it's entirely
under our control (in fact, I'm placing the logic just in its dtor).
[ChangeLog][QtCore][QThread] Destroying a QThread object created by
QThread::create() while the thread that it manages is still running will
now automatically ask that thread to quit, and will wait until the
thread has finished. Before, this resulted in a program crash. See the
documentation of QThread::~QThread() for more details.
Change-Id: Ib268b13da422e277ee3ed6f6c7b2ecc8cea5750c
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
std::function, which is used to store the type-erased continuation
lambdas, requires the passed callable to be copy-constructible. This
makes impossible to use move-only callables with continuations/handlers.
In particular, it makes impossible passing lambdas that are capturing
move-only objects. The workaround is to store the continuation lambda
inside a wrapper for the callable, which stores the move-only lambda in
a QSharedPtr and can be stored in std::function, since it's copyable.
Pick-to: 6.2
Fixes: QTBUG-98493
Change-Id: I8b7a22fcf68dc132b3c533216a7a1665e9f9fb0a
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Use variable args macros to swallow any extra commas in the
expression. To use this, the type of the exception has to be first.
Use Eddy's suggestion for a new name to avoid breaking the old macro.
[ChangeLog][QtTest] Added QVERIFY_THROWS_EXCEPTION, replacing
QVERIFY_EXCEPTION_THROWN, which has therefore been deprecated.
Change-Id: I16825c35bae0631c5fad5a9a3ace4d6edc067f83
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
We have some special handling in qt_windows.h,
use it instead of the original windows.h
Change-Id: I12fa45b09d3f2aad355573dce45861d7d28e1d77
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
[ChangeLog][QtCore] Added QtFuture::whenAll() and QtFuture::whenAny()
functions, returning a QFuture that becomes ready when all or any of the
supplied futures complete.
Task-number: QTBUG-86714
Change-Id: I2bb7dbb4cdc4f79a7a4fd494142df6a0f93a2b39
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
This change allows canceling the chain of continuations attached to a
future through canceling the future itself at any point of execution of
the chain.
[ChangeLog][QtCore][Important Behavior Changes] The chain of
continuations attached to a future now can be cancelled through
cancelling the future itself at any point of the execution of the chain,
as it was documented. Previously canceling the future would cancel the
chain only if it was done before the chain starts executing, otherwise
the cancellation would be ignored. Now the part of the chain that wasn't
started at the moment of cancellation will be canceled.
Task-number: QTBUG-97582
Change-Id: I4c3b3c68e34d3a044243ac9a7a9ed3c38b7cb02e
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Fix warning about unused variable, and use qScopeGuard to make sure that
the limit of the global threadpool is restored even if one of the tests
fail.
Pick-to: 6.2
Change-Id: I36747cb451074cceea961561478210728ed6d313
Reviewed-by: Ievgenii Meshcheriakov <ievgenii.meshcheriakov@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Unify cancel and finish in QPromise destructor in a single call. This
saves us one extra mutex lock and atomic state change.
Task-number: QTBUG-84977
Change-Id: Iac06302c39a2863008b27325fcf6792d4f58c8ae
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Add startOnReservedThread that specifically releases a reserved thread
and uses it atomically for a given task. This can make a positive
number of reserved threads work.
Change-Id: I4bd1dced24bb46fcb365f12cbc9c7905dc66cdf1
Reviewed-by: David Faure <david.faure@kdab.com>
Don't bother overwaiting in waitForDone(), if it was done at one point
after it was called we can return true. And do not stop threads recently
awakened by a startThread call as they have tasks to do.
Make allowing at least one thread regardless of reservation more
standard instead of hacked in certain places.
Pick-to: 6.2
Change-Id: I304bcdc5822f440d5e72fc33ba2aa1678c9ba0d0
Reviewed-by: David Faure <david.faure@kdab.com>
Testlib is not thread safe. Store the status into variable and check
it in the main thread instead.
Pick-to: 6.2
Change-Id: I840c8a3dceb1115a1b81ffeaa0fab96f9d2f1ff0
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Unix QThread implementation stores pthread_t as a system thread ID
when the thread is created, but never resets the system ID when
those threads are destroyed. Some implementations may reuse the
same thread IDs for new threads, and this may cause QThread::wait()
to erroneously complain that "Thread tried to wait on itself".
This patch sets the system thread ID to nullptr when the thread is
about to exit and be destroyed by the system.
A regression test is added to tst_qthread.
Fixes: QTBUG-96846
Pick-to: 5.15 6.2
Change-Id: I0850425dd0e09af50e59c9038e7e662a2a624beb
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
- process environment/DNS are OFF for INTEGRITY
Task-number: QTBUG-96176
Pick-to: 6.2
Change-Id: I189a97f88c96a428586c31a66b8d250e04482900
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
This ensures that a command such as
$ ninja tst_qlocale && ninja tst_qlocale_check
will automagically build the syslocaleapp program that the test runs
from a subtest. Similar for testlib's selftests and tst_QProcess.
As a drive-by, pruned some legacy comments from when CMakeLists.txt
files were generated from .pro files.
Change-Id: I67691a8175aaef124d4104cf1898193993408bdf
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Ensure that expired threads have actually finished before attempting
to restart them. Calling start() on a thread that is not yet finished
does nothing.
Add a regression test into tst_qthreadpool that attempts to trigger
reuse of expired threads and verifies that all submitted tasks
execute.
Fixes: QTBUG-72872
Pick-to: 6.2
Change-Id: I2109b628b8a4e91491115dc56aebf3eb249646b5
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
The test is randomly failing in the CI on QEMU. Couldn't reproduce it on
the actual armv7 hardware, so most likely it's not a Qt bug.
Fixes: QTBUG-96103
Pick-to: 6.1 6.2
Change-Id: I60b7264c6ce44b3b327fdd0dbcede006717c65a6
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
In the process, actually use the constants as the size of some arrays,
instead of making [1024] arrays and then only using a few entries.
Change-Id: I9f36b322840393b8680788190cf8b40a828f4957
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
The QtConcurrent::RunFunctionTask class keeps a variable to store the
result of QtConcurrent::run when it becomes available, so that it can be
reported afterwards. This requires the result type to be
default-constructible. However there's no need in storing the result, it
can be reported immediately after it becomes available.
Pick-to: 6.1 6.2
Fixes: QTBUG-95214
Change-Id: I95f3dbff0ab41eaa81b104a8834b37d10a0d193a
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
When the test failed, it never released the blocking slot, so the
tested thread remained blocked indefinitely. Blacklisting doesn't
rescue that: the test run gets killed by Coin's watchdog.
Use a QScopeGuard() to release the clocked slot on failure.
replacing the release that was happening only on success.
As drive-by clean-up, smarten up the code a little and remove an
unused enum.
Pick-to: 6.2 6.1 5.15
Change-Id: Ie035dafe6e4b1d82aea5de38ceb31c0f7fcf81d7
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
C++20 deprecated compound volatile statements such as pre- and
post-increments, to stress that they're not atomic. So instead of
volatile i;
~~~~;
++i;
you're now supposed to write
volatile i;
~~~~;
int j = i; // volatile load
++j;
i = j; // volatile store
which matches more closely what hardware does.
Instead of fixing every use of volatile pre- or post-increment in this
fashion individually, and realising that probably a few more Qt
modules will have the same kind of code patterns in them, write
QtPrivate functions to do the job centrally.
Change-Id: I838097bd484ef2118c071726963f103c080d2ba5
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
When inserting items into the result store, a ResultItem is created,
which stores a pointer to the results list and their size. If the size
of the ResultItem is set to 0, it means that a single result is stored.
In case of trying to report results via an empty list, the size is 0, so
result store treats it as a single result.
Added checks before storing the results to make sure that the result
list isn't empty. Note that empty lists are allowed in some cases for
the filter mode, because ResultStoreBase::addResults() knows how to
handle those cases correctly.
Task-number: QTBUG-80957
Pick-to: 5.15 6.1 6.2
Change-Id: I399af4c3eef6adf82fea5df031fe9a9075006b1f
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
All the getters of QFutureWatcher are consistent with the getters of the
corresponding QFuture, except for the isFinished() method, which returns
'true' only after the finished() signal is delivered. This behavior
might be unintuitive for the users. In particular, isFinished() returns
'false', even if it's called immediately after waitForFinished().
[ChangeLog][QtCore][QFutureWatcher][Important Behavior Changes] The
QFutureWatcher::isFinished() method now indicates if the related
QFuture is finished, instead of indicating if the finished() signal was
delivered. This makes it consistent with the future that is being
watched.
Fixes: QTBUG-91048
Pick-to: 6.1 6.2
Change-Id: I6ae9b882b23e06198a82c95b026491bd480b3bf0
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
The test causes frequent failures in the CI. Couldn't reproduce on
actual arm64 hardware, so it's likely to be a QEMU bug. From the
available logs it seems that all the test cases are flaky (there's a
failure even after cleanupTestCase() is called), so disable all of them.
Fixes: QTBUG-94737
Pick-to: 6.1 6.2
Change-Id: I783ec2179ba779a2c8d93351a78e8472a4f7a907
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
QMetaType now implicitly knows how to convert any QFuture<T> to
QFuture<void> without needing to manually register a converter
function.
QtWebChannel will make use of this to transparently support QFuture<T>
return types.
[ChangeLog][QtCore][QMetaType] QMetaType now supports converting any
QFuture<T> to QFuture<void>.
Task-number: QTBUG-92903
Change-Id: Ied7e71be37c346cc3d2c274ffb0d91a6821ab4d4
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
For generic interop with other parts of Qt, we need to be able to
extract the type-erased internal storage of QFuture<T>. In particular,
QtWebChannel needs this to transparently support QFuture<T> as a method
return type.
Task-number: QTBUG-92903
Change-Id: I763f054656b8810d58720262d364baf42c47eb37
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
... and C++20 std::counting_semaphore API compatibility.
[ChangeLog][QtCore][QSemaphore] tryAcquire() now optionally takes a
<chrono> duration as timeout, not just int milliseconds.
[ChangeLog][QtCore][QSemaphore] Added try_acquire{,_for,_until}() for
C++20 std::counting_semaphore compatibility.
Change-Id: I34b6b4bf57a54745d4b97349903d090c4995338a
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Output object name and class in QCOMPARE(). This should help
to debug flaky QWidget tests that for example check on focusWidget().
[ChangeLog][QtTestLib] QCOMPARE() now reports QObject * values by class and objectName().
Task-number: QTBUG-64446
Change-Id: Ife04e89bba04fc78d077c8f0f07af17a17c9cf8c
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
The check is over-arching. is_move_constructible is sufficient;
we don't have to support "ridiculous" types that are copiable but
have deleted move operations (such types are fundamentally broken).
This is in line with the Move* (legacy) named requirements.
Change-Id: Idc7116b39013501b9be39628a4e7afd35fe15530
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>
The API allows users to request and check the status of various
permissions. A predefined enum class of the common permission types
on different platforms is used to allow requesting permission with
a common code. Platform specific permissions are defined only on their
relevant platform. For permissions that are not predefined, they can
be requested via a string variant of this API.
This adds the Android implementation only.
[ChangeLog][QtCore] Add new API for handling app permissions with an
initial implementation for Android.
Task-number: QTBUG-90498
Change-Id: I3bc98c6ab2dceeea3ee8edec20a332ed8f56ad4f
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Even if the user (usually accidentally) sets a thread count of zero or
negative. The reporter in the bug report did
QThread::idealThreadCount() - 1 on a 1 CPU system...
Drive-by add to the documentation and the missing #include.
Pick-to: 6.1 6.0
Fixes: QTBUG-93007
Change-Id: I6cdea00671e8479b9c50fffd167807d14e030154
Reviewed-by: Samuel Gaist <samuel.gaist@idiap.ch>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
The test use aggregate initialization on some classes which however
are no longer aggregates in C++20 (the rules changed again; in C++20
having a user-*declared* constructor makes a class not an aggregate).
Just add a constructor so the code keeps compiling in both 17 and 20.
Fixes: QTBUG-92963
Pick-to: 6.0 6.1
Change-Id: I52371c5ee34c84358987b5ae8bee9ab9c49c8eab
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
