This patch removes most of the checks that are made using C++20
__cpp_* macros for features available in C++17 and earlier.
Library feature check macros (__cpp_lib_*) are unaffected.
Change-Id: I557b2bd0d4ff09b13837555e9880eb28e0355f64
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
The code for deducing the type of output sequence was assuming that the
input sequence is always a template class and was trying to use the
corresponding container type for the output sequence. Fixed the
deduction code, to assume that the output sequence has the same type as
the input sequence, when it's not a template class. Also added tests to
verify that all QtConcurrent functions support non-template input
sequences.
Fixes: QTBUG-30617
Pick-to: 6.2 6.1
Change-Id: I486fe99f3207cfff5dcceb3712cc7de863067edb
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
customFilters defined in .qdocconf are not supported anymore by Qt
Assistant since Qt 5.13. Therefore remove them from all .qdocconf files,
also to avoid cargo-culting them to new help modules.
Task-number: QTBUG-95987
Change-Id: I664391460637d2e859348da0338e1a4a3ee9f570
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Wrap the overloaded methods in qOverload(), to make the examples
compile.
Also remove the extra whitespaces when declaring nested templates.
Pick-to: 6.1 6.2
Change-Id: If438caa6d705d9036dae45278fb26e080918da89
Reviewed-by: Karsten Heimrich <karsten.heimrich@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
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>
After 6ebe3d0f08 users don't have to
specify the result type when using functors for as a reductor.
Task-number: QTBUG-88448
Change-Id: I065fed11c1a66833ba0aac3d18e7ff0545247be1
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
QStringList is a typedef for QList<QString>, so it doesn't need special
handling.
Change-Id: Ib371f9fa49d9d45da7956287dd0f5b6c0224f439
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
QtConcurrent reduce functions were requiring to explicitly pass the
the result type when passing functors as reductor. This was because of
inability to deduce the result type from the functors. The result type
of the QtConcurrent reduce functions should match with the type of the
fist argument of the operator() when a functor is passed. Reused the
ArgResolver type trait (already used for QFuture and QtConcurrent::run)
to find out the result type in that case.
Task-number: QTBUG-88448
Change-Id: Ief0eeee197df8cb9c30f3403d71978f36e4fb0f2
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Replace the hardcoded cpp exports with a generated one where it's
applicable.
Task-number: QTBUG-90492
Change-Id: Idc160b594987b2c765e75bd669aae851b4366282
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
After 79fd1cb2c6 the methods for running
QtConcurrent algorithms in the blocking mode aren't used anymore. Since
ThreadEngineBase and ThreadEngineStarter classes aren't meant to be used
externally, it should be fine to remove startBlocking() methods now.
Removed the unused code and adjusted the tests accordingly.
Change-Id: Ifb13820ce207869d6f720bcb5be8d35bb355fe33
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
This seems to cause errors when compiling with gcc-11. Although this is
most likely a compiler bug, specifiying the template parameter type in
this case isn't necessary.
Fixes: QTBUG-91909
Fixes: QTBUG-90568
Pick-to: 6.0 6.1 5.15
Change-Id: Ib231257ccb2e16cc533f23ca5840d31e26a66d53
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
For the readers that are new to QtConcurrent, it may be confusing that
unlike the normal usage of QPromise, they don't have to call start() or
finish() when using Qt Concurrent run with promise mode. Be more
explicit about that.
Pick-to: 6.1
Change-Id: I08df6c4ca41bec4120e208a6643ee20c7adf265c
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
This reverts a limited part of commit ad2da2d27a
that deleted .pro files for snippets compilation.
Some .pro files which contain snippets used in the documentation
itself should be restored.
Task-number: QTBUG-90483
Change-Id: I1b03833c8ff17b5fca43a5b6c5417e8545b1711b
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
Remove the qmake project files for most of Qt.
Leave the qmake project files for examples, because we still test those
in the CI to ensure qmake does not regress.
Also leave the qmake project files for utils and other minor parts that
lack CMake project files.
Task-number: QTBUG-88742
Change-Id: I6cdf059e6204816f617f9624f3ea9822703f73cc
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
After improving QtConcurrent::run() to use parameter packs for the
arguments (see c977e74afd), calling
overloaded functions is ambiguous. Updated the porting guide and the
documentation to mention this and describe possible workarounds.
Task-number: QTBUG-89648
Pick-to: 6.0
Change-Id: I4c1f996ae67bce8c13cc1f99f54240295db6ae1d
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Previously a default constructor was required for the result type
of mappedReduced() and filteredReduced(), even if a default value
was provided.
This patch fixes the problem.
The issue was in the ResultReporter type, that was calling
QList::resize() to adjust the size of expected reported results.
A default-value parameter was added to the class, so that
a corresponding overload of QList::resize could be invoked.
Task-number: QTBUG-88452
Change-Id: I51113753e314d76aa74d201b5a7e327a6ca75f47
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
The Professional CMake book suggests always using explicit linkage with
target_link_libraries, so let's use that.
Whether to use PUBLIC or PRIVATE depends on the context. But let's
be conservative and advise on using PRIVATE by default.
Task-number: QTBUG-88935
Pick-to: 6.0
Change-Id: I12b80ee85be9f6916f1e4dea6b1c9cb29e03c20f
Reviewed-by: Craig Scott <craig.scott@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
In order to demonstrate the new functionality, changed the example to
download the images from the network, scale and show them by attaching
different continuations to QFuture. Because QtConcurrent::map is not
used anymore, removed the suspension functionality (supporting
suspension of download would complicate the logic).
Task-number: QTBUG-87205
Change-Id: I5a48b63195d28025ae8c5de28bc6d6178dad03db
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
There are many different ways to to call map and filter functions
in QtConcurrent. This patch adds a python script to generate
all possible combinations.
Change-Id: I61ed1758601e219c5852e8cc939c5feebb23d2f6
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
The content in the porting guides are closer to a changelog than
a porting guide. At this point, it is easier for maintainers and
contributors to write in a changelog than a guide. This change
should help with readability and is closer to the usage of
"Changes" in documentation.
Part of a rename in other submodules.
Task-number: QTBUG-87156
Change-Id: Ib59de7976fae19e7b39962e80161df6628e4070b
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
This helps us determine the correct result type for std::vector, as
that one has two template arguments and would otherwise not get
caught here.
Change-Id: Ie887088bce25df2cadc8422a4212dc33d57ecfa5
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
The non-versioned one's do miss some properties. It's therefore best
to not advocate using them.
Change-Id: I53645e65ed4de4e0100e59905c024cdfe40be0c5
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Also move the porting section for QFuture and related classes after the
section for view classes, to make the order more natural for reading.
Change-Id: I5ea816d7bb3dfdda2b74112418bf07954c9ec94c
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Please note, that in case of run with promise it doesn't make
sense to provide the overload taking the FutureResult, as if we are
going to ignore the returned QFuture object, we can't communicate
with the passed QPromise.
Fixes: QTBUG-87083
Change-Id: I4066506736c2bbeea3e42030b9495f13e06cb27e
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
For historical reasons Qt Concurrent reports QUnhandledException in
case if an exception that is not derived from QException is thrown
from a worker thread. Changing this behavior may not be a good idea,
since the existing user code may rely on it. Changed QUnhandledException
to wrap the std::exception_ptr to the actual exception, so that the
users can obtain the information about the thrown exception if needed.
[ChangeLog][QtCore][QUnhandledException] Improved QUnhandledException to
store the std::exception_ptr to the actual exception thrown from a
QtCocnurrent worker thread.
Change-Id: I30e7c1d3e01aff6e1ed9938c421da0a888f12066
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
- Be more more consistent when declaring type aliases.
- Re-group include directives
Change-Id: Ic521e9f7692e538cc98871bdeccd9644c9879089
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Karsten Heimrich <karsten.heimrich@qt.io>
Using std::begin() and std::end() forces the user to have const begin()
and end() member functions being defined for the passed container. This
is because std::declval<T>() returns rvalue which forces the compiler
to select std::{begin, end}()(const Container &c) overloads and an test
for a presence of const {begin, end}() methods.
Change-Id: I9d96d9f73891ece53224f1741a1334500f7b35ad
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
- Replaced 'auto' keyword in function signatures by the actual return
type.
- Fixed signatures to not include enable_if statements.
Change-Id: I7292e8e506fd50d22974a86448fa4e85e8f08dfb
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Andreas Buhr <andreas.buhr@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Use QFuture::takeResult() instead of QFuture::result() for returning the
resulting sequence from the blocking methods of QtConcurrent.
Change-Id: I0b623ee1ad8bda6789f329dcd63a46acda924539
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Changed QtConcurrent algorithms to take the passed sequences as
universal references, where it makes sense. In addition to avoiding
to create extra copies when passing rvalues, this change allows
passing temporary container adaptors to QtConcurrent::map (e.g. see
the example in the ticket and the new test-cases).
Task-number: QTBUG-83170
Change-Id: Ia7c0833f4ec1d860294fa5214cd53934b65ff084
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
QtConcurrent algorithms are making an internal copy of the passed
sequence, to make sure it won't be destroyed before the execution
is finished. However, they were using iterators of the originally
passed sequence. So, if the original sequence is deleted, QtConcurrent
algorithms would use invalid iterators to a deleted sequence. This
might work with Qt containers thanks to implicit-sharing, but with
other containers will lead to unexpected results. Fixed them to work
on the internal copy of the original sequence.
Change-Id: I1d68692ed9746223c85f51bb05977bc1443b681d
Reviewed-by: Andreas Buhr <andreas.buhr@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Karsten Heimrich <karsten.heimrich@qt.io>
Modify special case locations to use the new API as well.
Clean up some stale .prev files that are not needed anymore.
Clean up some project files that are not used anymore.
Task-number: QTBUG-86815
Change-Id: I9947da921f98686023c6bb053dfcc101851276b5
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
