Port from qAsConst() to std::as_const()

We've been requiring C++17 since Qt 6.0, and our qAsConst use finally
starts to bother us (QTBUG-99313), so time to port away from it
now.

Since qAsConst has exactly the same semantics as std::as_const (down
to rvalue treatment, constexpr'ness and noexcept'ness), there's really
nothing more to it than a global search-and-replace, with manual
unstaging of the actual definition and documentation in dist/,
src/corelib/doc/ and src/corelib/global/.

Task-number: QTBUG-99313
Change-Id: I4c7114444a325ad4e62d0fcbfd347d2bbfb21541
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>

31 files changed, 67 insertions, 67 deletions

diff --git a/examples/corelib/serialization/cbordump/main.cpp b/examples/corelib/serialization/cbordump/main.cpp
index 16ff27d701..ed079d6a97 100644
--- a/examples/corelib/serialization/cbordump/main.cpp
+++ b/examples/corelib/serialization/cbordump/main.cpp
@@ -703,7 +703,7 @@ int main(int argc, char *argv[])
     QStringList files = parser.positionalArguments();
     if (files.isEmpty())
         files << "-";
-    for (const QString &file : qAsConst(files)) {
+    for (const QString &file : std::as_const(files)) {
         QFile f(file);
         if (file == "-" ? f.open(stdin, QIODevice::ReadOnly) : f.open(QIODevice::ReadOnly)) {
             if (files.size() > 1)
diff --git a/examples/corelib/serialization/convert/main.cpp b/examples/corelib/serialization/convert/main.cpp
index c234a28f1b..00c626e1c8 100644
--- a/examples/corelib/serialization/convert/main.cpp
+++ b/examples/corelib/serialization/convert/main.cpp
@@ -31,7 +31,7 @@ int main(int argc, char *argv[])
 
     QStringList inputFormats;
     QStringList outputFormats;
-    for (Converter *conv : qAsConst(*availableConverters)) {
+    for (Converter *conv : std::as_const(*availableConverters)) {
         auto direction = conv->directions();
         QString name = conv->name();
         if (direction & Converter::In)
@@ -82,7 +82,7 @@ int main(int argc, char *argv[])
 
     if (parser.isSet(formatOptionsOption)) {
         QString format = parser.value(formatOptionsOption);
-        for (Converter *conv : qAsConst(*availableConverters)) {
+        for (Converter *conv : std::as_const(*availableConverters)) {
             if (conv->name() == format) {
                 const char *help = conv->optionsHelp();
                 if (help)
@@ -100,7 +100,7 @@ int main(int argc, char *argv[])
     Converter *inconv = nullptr;
     QString format = parser.value(inputFormatOption);
     if (format != "auto") {
-        for (Converter *conv : qAsConst(*availableConverters)) {
+        for (Converter *conv : std::as_const(*availableConverters)) {
             if (conv->name() == format) {
                 inconv = conv;
                 break;
@@ -116,7 +116,7 @@ int main(int argc, char *argv[])
     Converter *outconv = nullptr;
     format = parser.value(outputFormatOption);
     if (format != "auto") {
-        for (Converter *conv : qAsConst(*availableConverters)) {
+        for (Converter *conv : std::as_const(*availableConverters)) {
             if (conv->name() == format) {
                 outconv = conv;
                 break;
@@ -155,7 +155,7 @@ int main(int argc, char *argv[])
 
     if (!inconv) {
         // probe the input to find a file format
-        for (Converter *conv : qAsConst(*availableConverters)) {
+        for (Converter *conv : std::as_const(*availableConverters)) {
             if (conv->directions() & Converter::In && conv->probeFile(&input)) {
                 inconv = conv;
                 break;
@@ -170,7 +170,7 @@ int main(int argc, char *argv[])
 
     if (!outconv) {
         // probe the output to find a file format
-        for (Converter *conv : qAsConst(*availableConverters)) {
+        for (Converter *conv : std::as_const(*availableConverters)) {
             if (conv->directions() & Converter::Out && conv->probeFile(&output)) {
                 outconv = conv;
                 break;
diff --git a/examples/network/download/main.cpp b/examples/network/download/main.cpp
index 32fccbad9c..227035af69 100644
--- a/examples/network/download/main.cpp
+++ b/examples/network/download/main.cpp
@@ -109,7 +109,7 @@ void DownloadManager::execute()
         return;
     }
 
-    for (const QString &arg : qAsConst(args)) {
+    for (const QString &arg : std::as_const(args)) {
         QUrl url = QUrl::fromEncoded(arg.toLocal8Bit());
         doDownload(url);
     }
diff --git a/examples/network/network-chat/client.cpp b/examples/network/network-chat/client.cpp
index c9b165f724..bbce358ce2 100644
--- a/examples/network/network-chat/client.cpp
+++ b/examples/network/network-chat/client.cpp
@@ -24,7 +24,7 @@ void Client::sendMessage(const QString &message)
     if (message.isEmpty())
         return;
 
-    for (Connection *connection : qAsConst(peers))
+    for (Connection *connection : std::as_const(peers))
         connection->sendMessage(message);
 }
 
diff --git a/examples/network/network-chat/peermanager.cpp b/examples/network/network-chat/peermanager.cpp
index 68a10b34be..45587404fd 100644
--- a/examples/network/network-chat/peermanager.cpp
+++ b/examples/network/network-chat/peermanager.cpp
@@ -78,7 +78,7 @@ void PeerManager::sendBroadcastDatagram()
     }
 
     bool validBroadcastAddresses = true;
-    for (const QHostAddress &address : qAsConst(broadcastAddresses)) {
+    for (const QHostAddress &address : std::as_const(broadcastAddresses)) {
         if (broadcastSocket.writeDatagram(datagram, address,
                                           broadcastPort) == -1)
             validBroadcastAddresses = false;
diff --git a/examples/network/torrent/filemanager.cpp b/examples/network/torrent/filemanager.cpp
index c86c3f2dd4..df964b9730 100644
--- a/examples/network/torrent/filemanager.cpp
+++ b/examples/network/torrent/filemanager.cpp
@@ -30,7 +30,7 @@ FileManager::~FileManager()
     cond.wakeOne();
     wait();
 
-    for (QFile *file : qAsConst(files)) {
+    for (QFile *file : std::as_const(files)) {
         file->close();
         delete file;
     }
@@ -391,7 +391,7 @@ void FileManager::verifyFileContents()
     }
 
     // Verify all pending pieces
-    for (int index : qAsConst(newPendingVerificationRequests))
+    for (int index : std::as_const(newPendingVerificationRequests))
         emit pieceVerified(index, verifySinglePiece(index));
 }
 
diff --git a/examples/network/torrent/mainwindow.cpp b/examples/network/torrent/mainwindow.cpp
index 4d710953a1..4c898743ba 100644
--- a/examples/network/torrent/mainwindow.cpp
+++ b/examples/network/torrent/mainwindow.cpp
@@ -311,7 +311,7 @@ bool MainWindow::addTorrent(const QString &fileName, const QString &destinationF
                             const QByteArray &resumeState)
 {
     // Check if the torrent is already being downloaded.
-    for (const Job &job : qAsConst(jobs)) {
+    for (const Job &job : std::as_const(jobs)) {
         if (job.torrentFileName == fileName && job.destinationDirectory == destinationFolder) {
             QMessageBox::warning(this, tr("Already downloading"),
                                  tr("The torrent file %1 is "
@@ -644,7 +644,7 @@ void MainWindow::closeEvent(QCloseEvent *)
     // them to signal that they have stopped.
     jobsToStop = 0;
     jobsStopped = 0;
-    for (const Job &job : qAsConst(jobs)) {
+    for (const Job &job : std::as_const(jobs)) {
         ++jobsToStop;
         TorrentClient *client = job.client;
         client->disconnect();
diff --git a/examples/network/torrent/ratecontroller.cpp b/examples/network/torrent/ratecontroller.cpp
index 3dd256a0f6..c5e33ab63c 100644
--- a/examples/network/torrent/ratecontroller.cpp
+++ b/examples/network/torrent/ratecontroller.cpp
@@ -33,7 +33,7 @@ void RateController::removeSocket(PeerWireClient *socket)
 void RateController::setDownloadLimit(int bytesPerSecond)
 {
     downLimit = bytesPerSecond;
-    for (PeerWireClient *socket : qAsConst(sockets))
+    for (PeerWireClient *socket : std::as_const(sockets))
         socket->setReadBufferSize(downLimit * 4);
 }
 
@@ -63,7 +63,7 @@ void RateController::transfer()
     }
 
     QSet<PeerWireClient *> pendingSockets;
-    for (PeerWireClient *client : qAsConst(sockets)) {
+    for (PeerWireClient *client : std::as_const(sockets)) {
         if (client->canTransferMore())
             pendingSockets << client;
     }
diff --git a/examples/network/torrent/torrentclient.cpp b/examples/network/torrent/torrentclient.cpp
index fcc1b285f1..6fefb3855c 100644
--- a/examples/network/torrent/torrentclient.cpp
+++ b/examples/network/torrent/torrentclient.cpp
@@ -416,7 +416,7 @@ void TorrentClient::stop()
     }
 
     // Abort all existing connections
-    for (PeerWireClient *client : qAsConst(d->connections)) {
+    for (PeerWireClient *client : std::as_const(d->connections)) {
         RateController::instance()->removeSocket(client);
         ConnectionManager::instance()->removeConnection(client);
         client->abort();
@@ -439,7 +439,7 @@ void TorrentClient::setPaused(bool paused)
         // connections to 0. Keep the list of peers, so we can quickly
         // resume later.
         d->setState(Paused);
-        for (PeerWireClient *client : qAsConst(d->connections))
+        for (PeerWireClient *client : std::as_const(d->connections))
             client->abort();
         d->connections.clear();
         TorrentServer::instance()->removeClient(this);
@@ -574,7 +574,7 @@ void TorrentClient::pieceVerified(int pieceIndex, bool ok)
     }
 
     // Update the peer list so we know who's still interesting.
-    for (TorrentPeer *peer : qAsConst(d->peers)) {
+    for (TorrentPeer *peer : std::as_const(d->peers)) {
         if (!peer->interesting)
             continue;
         bool interesting = false;
@@ -594,7 +594,7 @@ void TorrentClient::pieceVerified(int pieceIndex, bool ok)
     d->incompletePieces.clearBit(pieceIndex);
 
     // Notify connected peers.
-    for (PeerWireClient *client : qAsConst(d->connections)) {
+    for (PeerWireClient *client : std::as_const(d->connections)) {
         if (client->state() == QAbstractSocket::ConnectedState
             && !client->availablePieces().testBit(pieceIndex)) {
             client->sendPieceNotification(pieceIndex);
@@ -672,9 +672,9 @@ QList<TorrentPeer *> TorrentClient::weighedFreePeers() const
     qint64 now = QDateTime::currentSecsSinceEpoch();
     QList<TorrentPeer *> freePeers;
     QMap<QString, int> connectionsPerPeer;
-    for (TorrentPeer *peer : qAsConst(d->peers)) {
+    for (TorrentPeer *peer : std::as_const(d->peers)) {
         bool busy = false;
-        for (PeerWireClient *client : qAsConst(d->connections)) {
+        for (PeerWireClient *client : std::as_const(d->connections)) {
             if (client->state() == PeerWireClient::ConnectedState
                 && client->peerAddress() == peer->address
                 && client->peerPort() == peer->port) {
@@ -694,7 +694,7 @@ QList<TorrentPeer *> TorrentClient::weighedFreePeers() const
 
     // Assign points based on connection speed and pieces available.
     QList<QPair<int, TorrentPeer *> > points;
-    for (TorrentPeer *peer : qAsConst(freePeers)) {
+    for (TorrentPeer *peer : std::as_const(freePeers)) {
         int tmp = 0;
         if (peer->interesting) {
             tmp += peer->numCompletedPieces;
@@ -717,7 +717,7 @@ QList<TorrentPeer *> TorrentClient::weighedFreePeers() const
     QMultiMap<int, TorrentPeer *> pointMap;
     int lowestScore = 0;
     int lastIndex = 0;
-    for (const PointPair &point : qAsConst(points)) {
+    for (const PointPair &point : std::as_const(points)) {
         if (point.first > lowestScore) {
             lowestScore = point.first;
             ++lastIndex;
@@ -768,7 +768,7 @@ void TorrentClient::setupOutgoingConnection()
     PeerWireClient *client = qobject_cast<PeerWireClient *>(sender());
 
     // Update connection statistics.
-    for (TorrentPeer *peer : qAsConst(d->peers)) {
+    for (TorrentPeer *peer : std::as_const(d->peers)) {
         if (peer->port == client->peerPort() && peer->address == client->peerAddress()) {
             peer->connectTime = peer->lastVisited - peer->connectStart;
             break;
@@ -1040,7 +1040,7 @@ void TorrentClient::scheduleUploads()
     // no use in unchoking them.
     QList<PeerWireClient *> allClients = d->connections;
     QList<QPair<qint64, PeerWireClient *>> transferSpeeds;
-    for (PeerWireClient *client : qAsConst(allClients)) {
+    for (PeerWireClient *client : std::as_const(allClients)) {
         if (client->state() == QAbstractSocket::ConnectedState
             && client->availablePieces().count(true) != d->pieceCount) {
             if (d->state == Seeding) {
@@ -1098,7 +1098,7 @@ void TorrentClient::scheduleDownloads()
 
     // Check what each client is doing, and assign payloads to those
     // who are either idle or done.
-    for (PeerWireClient *client : qAsConst(d->connections))
+    for (PeerWireClient *client : std::as_const(d->connections))
         schedulePieceForClient(client);
 }
 
@@ -1177,7 +1177,7 @@ void TorrentClient::schedulePieceForClient(PeerWireClient *client)
         incompletePiecesAvailableToClient &= client->availablePieces();
 
         // Remove all pieces that this client has already requested.
-        for (int i : qAsConst(currentPieces))
+        for (int i : std::as_const(currentPieces))
             incompletePiecesAvailableToClient.clearBit(i);
 
         // Only continue if more pieces can be scheduled. If no pieces
@@ -1213,7 +1213,7 @@ void TorrentClient::schedulePieceForClient(PeerWireClient *client)
                 memset(occurrences, 0, d->pieceCount * sizeof(int));
 
                 // Count how many of each piece are available.
-                for (PeerWireClient *peer : qAsConst(d->connections)) {
+                for (PeerWireClient *peer : std::as_const(d->connections)) {
                     QBitArray peerPieces = peer->availablePieces();
                     int peerPiecesSize = peerPieces.size();
                     for (int i = 0; i < peerPiecesSize; ++i) {
@@ -1311,7 +1311,7 @@ void TorrentClient::requestMore(PeerWireClient *client)
 
     // Starting with the first piece that we're waiting for, request
     // blocks until the quota is filled up.
-    for (TorrentPiece *piece : qAsConst(piecesInProgress)) {
+    for (TorrentPiece *piece : std::as_const(piecesInProgress)) {
         numBlocksInProgress += requestBlocks(client, piece, maxInProgress - numBlocksInProgress);
         if (numBlocksInProgress == maxInProgress)
             break;
@@ -1414,7 +1414,7 @@ void TorrentClient::addToPeerList(const QList<TorrentPeer> &peerList)
         }
 
         bool known = false;
-        for (const TorrentPeer *knownPeer : qAsConst(d->peers)) {
+        for (const TorrentPeer *knownPeer : std::as_const(d->peers)) {
             if (knownPeer->port == peer.port
                 && knownPeer->address == peer.address) {
                 known = true;
@@ -1445,7 +1445,7 @@ void TorrentClient::addToPeerList(const QList<TorrentPeer> &peerList)
         const auto firstNInactivePeers = [&tooMany, this] (TorrentPeer *peer) {
             if (!tooMany)
                 return false;
-            for (const PeerWireClient *client : qAsConst(d->connections)) {
+            for (const PeerWireClient *client : std::as_const(d->connections)) {
                 if (client->peer() == peer && (client->downloadSpeed() + client->uploadSpeed()) > 1024)
                     return false;
             }
diff --git a/examples/network/torrent/torrentserver.cpp b/examples/network/torrent/torrentserver.cpp
index 8bdf98dd49..9751c25497 100644
--- a/examples/network/torrent/torrentserver.cpp
+++ b/examples/network/torrent/torrentserver.cpp
@@ -55,7 +55,7 @@ void TorrentServer::removeClient()
 void TorrentServer::processInfoHash(const QByteArray &infoHash)
 {
     PeerWireClient *peer = qobject_cast<PeerWireClient *>(sender());
-    for (TorrentClient *client : qAsConst(clients)) {
+    for (TorrentClient *client : std::as_const(clients)) {
         if (client->state() >= TorrentClient::Searching && client->infoHash() == infoHash) {
             peer->disconnect(peer, nullptr, this, nullptr);
             client->setupIncomingConnection(peer);
diff --git a/examples/opengl/contextinfo/widget.cpp b/examples/opengl/contextinfo/widget.cpp
index a4ae397382..398f49b8dd 100644
--- a/examples/opengl/contextinfo/widget.cpp
+++ b/examples/opengl/contextinfo/widget.cpp
@@ -345,7 +345,7 @@ void Widget::renderWindowReady()
     QList<QByteArray> extensionList = context->extensions().values();
     std::sort(extensionList.begin(), extensionList.end());
     m_extensions->append(tr("Found %1 extensions:").arg(extensionList.count()));
-    for (const QByteArray &ext : qAsConst(extensionList))
+    for (const QByteArray &ext : std::as_const(extensionList))
         m_extensions->append(QString::fromLatin1(ext));
 
     m_output->moveCursor(QTextCursor::Start);
diff --git a/examples/opengl/qopenglwidget/glwidget.cpp b/examples/opengl/qopenglwidget/glwidget.cpp
index 96d5d51321..e2a3ea4fc5 100644
--- a/examples/opengl/qopenglwidget/glwidget.cpp
+++ b/examples/opengl/qopenglwidget/glwidget.cpp
@@ -358,7 +358,7 @@ void GLWidget::paintGL()
     painter.endNativePainting();
 
     if (m_showBubbles) {
-        for (Bubble *bubble : qAsConst(m_bubbles))
+        for (Bubble *bubble : std::as_const(m_bubbles))
             bubble->drawBubble(&painter);
     }
 
@@ -371,7 +371,7 @@ void GLWidget::paintGL()
 
     painter.end();
 
-    for (Bubble *bubble : qAsConst(m_bubbles))
+    for (Bubble *bubble : std::as_const(m_bubbles))
         bubble->move(rect());
 
     if (!(m_frames % 100)) {
diff --git a/examples/opengl/qopenglwidget/mainwindow.cpp b/examples/opengl/qopenglwidget/mainwindow.cpp
index 409ff7b507..c383a692d5 100644
--- a/examples/opengl/qopenglwidget/mainwindow.cpp
+++ b/examples/opengl/qopenglwidget/mainwindow.cpp
@@ -133,7 +133,7 @@ void MainWindow::timerUsageChanged(bool enabled)
         m_timer->start();
     } else {
         m_timer->stop();
-        for (QOpenGLWidget *w : qAsConst(m_glWidgets))
+        for (QOpenGLWidget *w : std::as_const(m_glWidgets))
             w->update();
     }
 }
diff --git a/examples/widgets/dialogs/standarddialogs/dialog.cpp b/examples/widgets/dialogs/standarddialogs/dialog.cpp
index 1775a4231a..443101e421 100644
--- a/examples/widgets/dialogs/standarddialogs/dialog.cpp
+++ b/examples/widgets/dialogs/standarddialogs/dialog.cpp
@@ -52,7 +52,7 @@ void DialogOptionsWidget::addSpacer()
 int DialogOptionsWidget::value() const
 {
     int result = 0;
-    for (const CheckBoxEntry &checkboxEntry : qAsConst(checkBoxEntries)) {
+    for (const CheckBoxEntry &checkboxEntry : std::as_const(checkBoxEntries)) {
         if (checkboxEntry.first->isChecked())
             result |= checkboxEntry.second;
     }
diff --git a/examples/widgets/graphicsview/diagramscene/diagramitem.cpp b/examples/widgets/graphicsview/diagramscene/diagramitem.cpp
index fe9e7584e3..82b832837b 100644
--- a/examples/widgets/graphicsview/diagramscene/diagramitem.cpp
+++ b/examples/widgets/graphicsview/diagramscene/diagramitem.cpp
@@ -105,7 +105,7 @@ void DiagramItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
 QVariant DiagramItem::itemChange(GraphicsItemChange change, const QVariant &value)
 {
     if (change == QGraphicsItem::ItemPositionChange) {
-        for (Arrow *arrow : qAsConst(arrows))
+        for (Arrow *arrow : std::as_const(arrows))
             arrow->updatePosition();
     }
 
diff --git a/examples/widgets/graphicsview/diagramscene/mainwindow.cpp b/examples/widgets/graphicsview/diagramscene/mainwindow.cpp
index dc77b500cb..d6a389af38 100644
--- a/examples/widgets/graphicsview/diagramscene/mainwindow.cpp
+++ b/examples/widgets/graphicsview/diagramscene/mainwindow.cpp
@@ -87,7 +87,7 @@ void MainWindow::buttonGroupClicked(QAbstractButton *button)
 void MainWindow::deleteItem()
 {
     QList<QGraphicsItem *> selectedItems = scene->selectedItems();
-    for (QGraphicsItem *item : qAsConst(selectedItems)) {
+    for (QGraphicsItem *item : std::as_const(selectedItems)) {
         if (item->type() == Arrow::Type) {
             scene->removeItem(item);
             Arrow *arrow = qgraphicsitem_cast<Arrow *>(item);
@@ -98,7 +98,7 @@ void MainWindow::deleteItem()
     }
 
     selectedItems = scene->selectedItems();
-    for (QGraphicsItem *item : qAsConst(selectedItems)) {
+    for (QGraphicsItem *item : std::as_const(selectedItems)) {
          if (item->type() == DiagramItem::Type)
              qgraphicsitem_cast<DiagramItem *>(item)->removeArrows();
          scene->removeItem(item);
diff --git a/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp b/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp
index 3d8ca8e972..ede3d23137 100644
--- a/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp
+++ b/examples/widgets/graphicsview/elasticnodes/graphwidget.cpp
@@ -123,11 +123,11 @@ void GraphWidget::timerEvent(QTimerEvent *event)
             nodes << node;
     }
 
-    for (Node *node : qAsConst(nodes))
+    for (Node *node : std::as_const(nodes))
         node->calculateForces();
 
     bool itemsMoved = false;
-    for (Node *node : qAsConst(nodes)) {
+    for (Node *node : std::as_const(nodes)) {
         if (node->advancePosition())
             itemsMoved = true;
     }
diff --git a/examples/widgets/graphicsview/elasticnodes/node.cpp b/examples/widgets/graphicsview/elasticnodes/node.cpp
index fd8df0b32b..eb102f0aa4 100644
--- a/examples/widgets/graphicsview/elasticnodes/node.cpp
+++ b/examples/widgets/graphicsview/elasticnodes/node.cpp
@@ -67,7 +67,7 @@ void Node::calculateForces()
 //! [4]
     // Now subtract all forces pulling items together
     double weight = (edgeList.size() + 1) * 10;
-    for (const Edge *edge : qAsConst(edgeList)) {
+    for (const Edge *edge : std::as_const(edgeList)) {
         QPointF vec;
         if (edge->sourceNode() == this)
             vec = mapToItem(edge->destNode(), 0, 0);
@@ -148,7 +148,7 @@ QVariant Node::itemChange(GraphicsItemChange change, const QVariant &value)
 {
     switch (change) {
     case ItemPositionHasChanged:
-        for (Edge *edge : qAsConst(edgeList))
+        for (Edge *edge : std::as_const(edgeList))
             edge->adjust();
         graph->itemMoved();
         break;
diff --git a/examples/widgets/graphicsview/flowlayout/flowlayout.cpp b/examples/widgets/graphicsview/flowlayout/flowlayout.cpp
index 1f9fb25e75..ab5f4717b3 100644
--- a/examples/widgets/graphicsview/flowlayout/flowlayout.cpp
+++ b/examples/widgets/graphicsview/flowlayout/flowlayout.cpp
@@ -102,7 +102,7 @@ QSizeF FlowLayout::minSize(const QSizeF &constraint) const
     } else if (constraint.height() >= 0) {  // width for height?
         // not supported
     } else {
-        for (const QGraphicsLayoutItem *item : qAsConst(m_items))
+        for (const QGraphicsLayoutItem *item : std::as_const(m_items))
             size = size.expandedTo(item->effectiveSizeHint(Qt::MinimumSize));
         size += QSizeF(left + right, top + bottom);
     }
@@ -116,7 +116,7 @@ QSizeF FlowLayout::prefSize() const
 
     qreal maxh = 0;
     qreal totalWidth = 0;
-    for (const QGraphicsLayoutItem *item : qAsConst(m_items)) {
+    for (const QGraphicsLayoutItem *item : std::as_const(m_items)) {
         if (totalWidth > 0)
             totalWidth += spacing(Qt::Horizontal);
         QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize);
@@ -135,7 +135,7 @@ QSizeF FlowLayout::maxSize() const
 {
     qreal totalWidth = 0;
     qreal totalHeight = 0;
-    for (const QGraphicsLayoutItem *item : qAsConst(m_items)) {
+    for (const QGraphicsLayoutItem *item : std::as_const(m_items)) {
         if (totalWidth > 0)
             totalWidth += spacing(Qt::Horizontal);
         if (totalHeight > 0)
diff --git a/examples/widgets/itemviews/addressbook/addresswidget.cpp b/examples/widgets/itemviews/addressbook/addresswidget.cpp
index 955a766750..6be8867a94 100644
--- a/examples/widgets/itemviews/addressbook/addresswidget.cpp
+++ b/examples/widgets/itemviews/addressbook/addresswidget.cpp
@@ -164,7 +164,7 @@ void AddressWidget::readFromFile(const QString &fileName)
         QMessageBox::information(this, tr("No contacts in file"),
                                  tr("The file you are attempting to open contains no contacts."));
     } else {
-        for (const auto &contact: qAsConst(contacts))
+        for (const auto &contact: std::as_const(contacts))
             addEntry(contact.name, contact.address);
     }
 }
diff --git a/examples/widgets/itemviews/editabletreemodel/treeitem.cpp b/examples/widgets/itemviews/editabletreemodel/treeitem.cpp
index 5784202b93..942ba277a3 100644
--- a/examples/widgets/itemviews/editabletreemodel/treeitem.cpp
+++ b/examples/widgets/itemviews/editabletreemodel/treeitem.cpp
@@ -88,7 +88,7 @@ bool TreeItem::insertColumns(int position, int columns)
     for (int column = 0; column < columns; ++column)
         itemData.insert(position, QVariant());
 
-    for (TreeItem *child : qAsConst(childItems))
+    for (TreeItem *child : std::as_const(childItems))
         child->insertColumns(position, columns);
 
     return true;
@@ -123,7 +123,7 @@ bool TreeItem::removeColumns(int position, int columns)
     for (int column = 0; column < columns; ++column)
         itemData.remove(position);
 
-    for (TreeItem *child : qAsConst(childItems))
+    for (TreeItem *child : std::as_const(childItems))
         child->removeColumns(position, columns);
 
     return true;
diff --git a/examples/widgets/layouts/dynamiclayouts/dialog.cpp b/examples/widgets/layouts/dynamiclayouts/dialog.cpp
index 8dc3d069bc..28b4fc2f7f 100644
--- a/examples/widgets/layouts/dynamiclayouts/dialog.cpp
+++ b/examples/widgets/layouts/dynamiclayouts/dialog.cpp
@@ -57,7 +57,7 @@ void Dialog::rotateWidgets()
 {
     Q_ASSERT(rotatableWidgets.count() % 2 == 0);
 
-    for (QWidget *widget : qAsConst(rotatableWidgets))
+    for (QWidget *widget : std::as_const(rotatableWidgets))
         rotatableLayout->removeWidget(widget);
 
     rotatableWidgets.enqueue(rotatableWidgets.dequeue());
diff --git a/examples/widgets/layouts/flowlayout/flowlayout.cpp b/examples/widgets/layouts/flowlayout/flowlayout.cpp
index b4cba9fe69..0565053096 100644
--- a/examples/widgets/layouts/flowlayout/flowlayout.cpp
+++ b/examples/widgets/layouts/flowlayout/flowlayout.cpp
@@ -108,7 +108,7 @@ QSize FlowLayout::sizeHint() const
 QSize FlowLayout::minimumSize() const
 {
     QSize size;
-    for (const QLayoutItem *item : qAsConst(itemList))
+    for (const QLayoutItem *item : std::as_const(itemList))
         size = size.expandedTo(item->minimumSize());
 
     const QMargins margins = contentsMargins();
@@ -129,7 +129,7 @@ int FlowLayout::doLayout(const QRect &rect, bool testOnly) const
 //! [9]
 
 //! [10]
-    for (QLayoutItem *item : qAsConst(itemList)) {
+    for (QLayoutItem *item : std::as_const(itemList)) {
         const QWidget *wid = item->widget();
         int spaceX = horizontalSpacing();
         if (spaceX == -1)
diff --git a/examples/widgets/painting/fontsampler/mainwindow.cpp b/examples/widgets/painting/fontsampler/mainwindow.cpp
index 1b1b816395..e2bd768f79 100644
--- a/examples/widgets/painting/fontsampler/mainwindow.cpp
+++ b/examples/widgets/painting/fontsampler/mainwindow.cpp
@@ -260,7 +260,7 @@ void MainWindow::printPage(int index, QPainter *painter, QPrinter *printer)
         bool italic = item->data(0, Qt::UserRole + 1).toBool();
 
         // Calculate the maximum width and total height of the text.
-        for (int size : qAsConst(sampleSizes)) {
+        for (int size : std::as_const(sampleSizes)) {
             QFont font(family, size, weight, italic);
             font.setStyleName(style);
             font = QFont(font, painter->device());
@@ -294,7 +294,7 @@ void MainWindow::printPage(int index, QPainter *painter, QPrinter *printer)
         bool italic = item->data(0, Qt::UserRole + 1).toBool();
 
         // Draw each line of text.
-        for (int size : qAsConst(sampleSizes)) {
+        for (int size : std::as_const(sampleSizes)) {
             QFont font(family, size, weight, italic);
             font.setStyleName(style);
             font = QFont(font, painter->device());
diff --git a/examples/widgets/painting/gradients/gradients.cpp b/examples/widgets/painting/gradients/gradients.cpp
index dcedd250cf..538d851eb8 100644
--- a/examples/widgets/painting/gradients/gradients.cpp
+++ b/examples/widgets/painting/gradients/gradients.cpp
@@ -534,7 +534,7 @@ void GradientRenderer::paint(QPainter *p)
         g = QConicalGradient(pts.at(0), angle);
     }
 
-    for (const auto &stop : qAsConst(m_stops))
+    for (const auto &stop : std::as_const(m_stops))
         g.setColorAt(stop.first, stop.second);
 
     g.setSpread(m_spread);
diff --git a/examples/widgets/painting/painterpaths/window.cpp b/examples/widgets/painting/painterpaths/window.cpp
index 4fc3e8efd9..01b62d6988 100644
--- a/examples/widgets/painting/painterpaths/window.cpp
+++ b/examples/widgets/painting/painterpaths/window.cpp
@@ -156,7 +156,7 @@ Window::Window()
     connect(penColorComboBox, &QComboBox::activated,
             this, &Window::penColorChanged);
 
-    for (RenderArea *area : qAsConst(renderAreas)) {
+    for (RenderArea *area : std::as_const(renderAreas)) {
         connect(penWidthSpinBox, &QSpinBox::valueChanged,
                 area, &RenderArea::setPenWidth);
         connect(rotationAngleSpinBox, &QSpinBox::valueChanged,
@@ -167,7 +167,7 @@ Window::Window()
     QGridLayout *topLayout = new QGridLayout;
 
     int i = 0;
-    for (RenderArea *area : qAsConst(renderAreas)) {
+    for (RenderArea *area : std::as_const(renderAreas)) {
         topLayout->addWidget(area, i / 3, i % 3);
         ++i;
     }
@@ -204,7 +204,7 @@ void Window::fillRuleChanged()
 {
     Qt::FillRule rule = (Qt::FillRule)currentItemData(fillRuleComboBox).toInt();
 
-    for (RenderArea *area : qAsConst(renderAreas))
+    for (RenderArea *area : std::as_const(renderAreas))
         area->setFillRule(rule);
 }
 //! [19]
@@ -215,7 +215,7 @@ void Window::fillGradientChanged()
     QColor color1 = qvariant_cast<QColor>(currentItemData(fillColor1ComboBox));
     QColor color2 = qvariant_cast<QColor>(currentItemData(fillColor2ComboBox));
 
-    for (RenderArea *area : qAsConst(renderAreas))
+    for (RenderArea *area : std::as_const(renderAreas))
         area->setFillGradient(color1, color2);
 }
 //! [20]
@@ -225,7 +225,7 @@ void Window::penColorChanged()
 {
     QColor color = qvariant_cast<QColor>(currentItemData(penColorComboBox));
 
-    for (RenderArea *area : qAsConst(renderAreas))
+    for (RenderArea *area : std::as_const(renderAreas))
         area->setPenColor(color);
 }
 //! [21]
diff --git a/examples/widgets/painting/shared/hoverpoints.cpp b/examples/widgets/painting/shared/hoverpoints.cpp
index 7d2bb81538..87e1eb4415 100644
--- a/examples/widgets/painting/shared/hoverpoints.cpp
+++ b/examples/widgets/painting/shared/hoverpoints.cpp
@@ -268,7 +268,7 @@ void HoverPoints::paintPoints()
     p.setPen(m_pointPen);
     p.setBrush(m_pointBrush);
 
-    for (const auto &point : qAsConst(m_points)) {
+    for (const auto &point : std::as_const(m_points)) {
         QRectF bounds = pointBoundingRect(point);
         if (m_shape == CircleShape)
             p.drawEllipse(bounds);
diff --git a/examples/widgets/richtext/syntaxhighlighter/highlighter.cpp b/examples/widgets/richtext/syntaxhighlighter/highlighter.cpp
index 11e203c333..d78de20a7d 100644
--- a/examples/widgets/richtext/syntaxhighlighter/highlighter.cpp
+++ b/examples/widgets/richtext/syntaxhighlighter/highlighter.cpp
@@ -72,7 +72,7 @@ Highlighter::Highlighter(QTextDocument *parent)
 //! [7]
 void Highlighter::highlightBlock(const QString &text)
 {
-    for (const HighlightingRule &rule : qAsConst(highlightingRules)) {
+    for (const HighlightingRule &rule : std::as_const(highlightingRules)) {
         QRegularExpressionMatchIterator matchIterator = rule.pattern.globalMatch(text);
         while (matchIterator.hasNext()) {
             QRegularExpressionMatch match = matchIterator.next();
diff --git a/examples/widgets/widgets/scribble/mainwindow.cpp b/examples/widgets/widgets/scribble/mainwindow.cpp
index b7e08598f7..0a0a658265 100644
--- a/examples/widgets/widgets/scribble/mainwindow.cpp
+++ b/examples/widgets/widgets/scribble/mainwindow.cpp
@@ -153,7 +153,7 @@ void MainWindow::createMenus()
 //! [15] //! [16]
 {
     saveAsMenu = new QMenu(tr("&Save As"), this);
-    for (QAction *action : qAsConst(saveAsActs))
+    for (QAction *action : std::as_const(saveAsActs))
         saveAsMenu->addAction(action);
 
     fileMenu = new QMenu(tr("&File"), this);
diff --git a/examples/widgets/widgets/tooltips/sortingbox.cpp b/examples/widgets/widgets/tooltips/sortingbox.cpp
index 2b9127f5bd..1f6de0bd8c 100644
--- a/examples/widgets/widgets/tooltips/sortingbox.cpp
+++ b/examples/widgets/widgets/tooltips/sortingbox.cpp
@@ -97,7 +97,7 @@ void SortingBox::paintEvent(QPaintEvent * /* event */)
 {
     QPainter painter(this);
     painter.setRenderHint(QPainter::Antialiasing);
-    for (const ShapeItem &shapeItem : qAsConst(shapeItems)) {
+    for (const ShapeItem &shapeItem : std::as_const(shapeItems)) {
 //! [8] //! [9]
         painter.translate(shapeItem.position());
 //! [9] //! [10]
diff --git a/examples/xml/htmlinfo/main.cpp b/examples/xml/htmlinfo/main.cpp
index d9fc9a1861..d01421ff84 100644
--- a/examples/xml/htmlinfo/main.cpp
+++ b/examples/xml/htmlinfo/main.cpp
@@ -51,7 +51,7 @@ void parseHtmlFile(QTextStream &out, const QString &fileName)
     while (links.size() > 5)
         links.removeLast();
 
-    for (const QString &link : qAsConst(links))
+    for (const QString &link : std::as_const(links))
         out << "    " << link << Qt::endl;
     out << Qt::endl << Qt::endl;
 }