Eradicate Java-style iterators and Q_FOREACH and mark the module free of them

... and QLinkedList.

Java-style iterators are scheduled to be deprecated, or at the very
least banned from use in Qt's own implementation. Ditto Q_FOREACH.
Ditto QLinkedList.

Change-Id: I92eb5c22762b63cba45f8eaf717c1b7d458fcda4
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

6 files changed, 18 insertions, 28 deletions

diff --git a/.qmake.conf b/.qmake.conf
index 92f4428e..eb6b6a3b 100644
--- a/.qmake.conf
+++ b/.qmake.conf
@@ -2,4 +2,6 @@ load(qt_build_config)
 CONFIG += warning_clean
 android|ios|qnx|isEmpty(QT.widgets.name): CONFIG += no_desktop
 
+DEFINES += QT_NO_FOREACH QT_NO_JAVA_STYLE_ITERATORS QT_NO_LINKED_LIST
+
 MODULE_VERSION = 5.14.0
diff --git a/examples/quickcontrols/controls/tableview/src/sortfilterproxymodel.cpp b/examples/quickcontrols/controls/tableview/src/sortfilterproxymodel.cpp
index b93641a9..1e47f23e 100644
--- a/examples/quickcontrols/controls/tableview/src/sortfilterproxymodel.cpp
+++ b/examples/quickcontrols/controls/tableview/src/sortfilterproxymodel.cpp
@@ -132,11 +132,8 @@ QJSValue SortFilterProxyModel::get(int idx) const
     QJSValue value = engine->newObject();
     if (idx >= 0 && idx < count()) {
         QHash<int, QByteArray> roles = roleNames();
-        QHashIterator<int, QByteArray> it(roles);
-        while (it.hasNext()) {
-            it.next();
+        for (auto it = roles.cbegin(), end = roles.cend(); it != end; ++it)
             value.setProperty(QString::fromUtf8(it.value()), data(index(idx, 0), it.key()).toString());
-        }
     }
     return value;
 }
@@ -156,14 +153,7 @@ void SortFilterProxyModel::componentComplete()
 
 int SortFilterProxyModel::roleKey(const QByteArray &role) const
 {
-    QHash<int, QByteArray> roles = roleNames();
-    QHashIterator<int, QByteArray> it(roles);
-    while (it.hasNext()) {
-        it.next();
-        if (it.value() == role)
-            return it.key();
-    }
-    return -1;
+    return roleNames().key(role, -1);
 }
 
 QHash<int, QByteArray> SortFilterProxyModel::roleNames() const
@@ -181,9 +171,7 @@ bool SortFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &so
     QAbstractItemModel *model = sourceModel();
     if (filterRole().isEmpty()) {
         QHash<int, QByteArray> roles = roleNames();
-        QHashIterator<int, QByteArray> it(roles);
-        while (it.hasNext()) {
-            it.next();
+        for (auto it = roles.cbegin(), end = roles.cend(); it != end; ++it) {
             QModelIndex sourceIndex = model->index(sourceRow, 0, sourceParent);
             QString key = model->data(sourceIndex, it.key()).toString();
             if (key.contains(rx))
diff --git a/examples/quickcontrols/controls/texteditor/src/documenthandler.cpp b/examples/quickcontrols/controls/texteditor/src/documenthandler.cpp
index 69da88f0..ac9f5bd4 100644
--- a/examples/quickcontrols/controls/texteditor/src/documenthandler.cpp
+++ b/examples/quickcontrols/controls/texteditor/src/documenthandler.cpp
@@ -345,7 +345,8 @@ QStringList DocumentHandler::defaultFontSizes() const
     // uhm... this is quite ugly
     QStringList sizes;
     QFontDatabase db;
-    foreach (int size, db.standardSizes())
+    const auto standardSizes = db.standardSizes();
+    for (int size : standardSizes)
         sizes.append(QString::number(size));
     return sizes;
 }
diff --git a/tests/auto/qquicktreemodeladaptor/tst_qquicktreemodeladaptor.cpp b/tests/auto/qquicktreemodeladaptor/tst_qquicktreemodeladaptor.cpp
index 0fec548d..c035c676 100644
--- a/tests/auto/qquicktreemodeladaptor/tst_qquicktreemodeladaptor.cpp
+++ b/tests/auto/qquicktreemodeladaptor/tst_qquicktreemodeladaptor.cpp
@@ -1181,8 +1181,8 @@ void tst_QQuickTreeModelAdaptor::reparentOnSameRow()
     // at least DepthRole and ModeIndexRole changes should have happened for the affected row
     bool depthChanged = false;
     bool modelIndexChanged = false;
-    QList<QList<QVariant> > &changes = dataChangedSpy;
-    foreach (QList<QVariant> change, changes) {
+    const QList<QList<QVariant> > &changes = dataChangedSpy;
+    for (const QList<QVariant> &change : changes) {
         if (change.at(0) == movedIndex) {
             if (change.at(2).value<QVector<int> >().contains(QQuickTreeModelAdaptor1::DepthRole))
                 depthChanged = true;
@@ -1258,7 +1258,7 @@ void tst_QQuickTreeModelAdaptor::selectionForRowRange()
         QCOMPARE(sel.count(), 2);
         // We don't know in which order the selection ranges are
         // being added, so we iterate and try to find what we expect.
-        foreach (const QItemSelectionRange &range, sel) {
+        for (const QItemSelectionRange &range : sel) {
             if (range.topLeft() ==  model.index(0, 0))
                 QCOMPARE(QModelIndex(range.bottomRight()), model.index(0, 0));
             else if (range.topLeft() ==  model.index(0, 0, parent))
@@ -1275,7 +1275,7 @@ void tst_QQuickTreeModelAdaptor::selectionForRowRange()
         QCOMPARE(sel.count(), 2);
         // We don't know in which order the selection ranges are
         // being added, so we iterate and try to find what we expect.
-        foreach (const QItemSelectionRange &range, sel) {
+        for (const QItemSelectionRange &range : sel) {
             if (range.topLeft() ==  model.index(0, 0))
                 QCOMPARE(QModelIndex(range.bottomRight()), model.index(4, 0));
             else if (range.topLeft() ==  model.index(0, 0, parent))
@@ -1296,7 +1296,7 @@ void tst_QQuickTreeModelAdaptor::selectionForRowRange()
         QCOMPARE(sel.count(), 3);
         // We don't know in which order the selection ranges are
         // being added, so we iterate and try to find what we expect.
-        foreach (const QItemSelectionRange &range, sel) {
+        for (const QItemSelectionRange &range : sel) {
             if (range.topLeft() ==  model.index(0, 0))
                 QCOMPARE(QModelIndex(range.bottomRight()), model.index(4, 0));
             else if (range.topLeft() ==  model.index(0, 0, parent))
@@ -1319,7 +1319,7 @@ void tst_QQuickTreeModelAdaptor::selectionForRowRange()
         QCOMPARE(sel.count(), 3);
         // We don't know in which order the selection ranges are
         // being added, so we iterate and try to find what we expect.
-        foreach (const QItemSelectionRange &range, sel) {
+        for (const QItemSelectionRange &range : sel) {
             if (range.topLeft() ==  model.index(0, 0))
                 QCOMPARE(QModelIndex(range.bottomRight()), model.index(0, 0));
             else if (range.topLeft() ==  model.index(0, 0, parent))
@@ -1338,7 +1338,7 @@ void tst_QQuickTreeModelAdaptor::selectionForRowRange()
         QCOMPARE(sel.count(), 4);
         // We don't know in which order the selection ranges are
         // being added, so we iterate and try to find what we expect.
-        foreach (const QItemSelectionRange &range, sel) {
+        for (const QItemSelectionRange &range : sel) {
             if (range.topLeft() ==  model.index(0, 0))
                 QCOMPARE(QModelIndex(range.bottomRight()), model.index(ModelRowCount - 1, 0));
             else if (range.topLeft() ==  model.index(0, 0, parent))
@@ -1359,7 +1359,7 @@ void tst_QQuickTreeModelAdaptor::selectionForRowRange()
         QCOMPARE(sel.count(), 4);
         // We don't know in which order the selection ranges are
         // being added, so we iterate and try to find what we expect.
-        foreach (const QItemSelectionRange &range, sel) {
+        for (const QItemSelectionRange &range : sel) {
             if (range.topLeft() ==  model.index(1, 0))
                 QCOMPARE(QModelIndex(range.bottomRight()), model.index(1, 0));
             else if (range.topLeft() ==  model.index(1, 0, parent))
diff --git a/tests/auto/shared/testmodel.h b/tests/auto/shared/testmodel.h
index 6eaab74a..b1d9308e 100644
--- a/tests/auto/shared/testmodel.h
+++ b/tests/auto/shared/testmodel.h
@@ -289,8 +289,7 @@ public:
 
         ~Node()
         {
-            foreach (Node *n, children)
-               delete n;
+            qDeleteAll(children);
         }
 
         void addRows(int row, int count)
diff --git a/tests/benchmarks/objectcount/tst_objectcount.cpp b/tests/benchmarks/objectcount/tst_objectcount.cpp
index c5797160..996b4b66 100644
--- a/tests/benchmarks/objectcount/tst_objectcount.cpp
+++ b/tests/benchmarks/objectcount/tst_objectcount.cpp
@@ -83,7 +83,7 @@ static void printItems(const QList<QQuickItem *> &items)
     std::cout << "     QQuickItems: " << items.count() << " (total of QObjects: " << qt_qobjects->count() << ")" << std::endl;
 
     if (qt_verbose) {
-        foreach (QObject *object, *qt_qobjects)
+        for (QObject *object : qAsConst(*qt_qobjects))
             qInfo() << "\t" << object;
     }
 }
@@ -101,7 +101,7 @@ void tst_ObjectCount::controls()
     QVERIFY2(object.data(), qPrintable(component.errorString()));
 
     QList<QQuickItem *> items;
-    foreach (QObject *object, *qt_qobjects()) {
+    for (QObject *object : qAsConst(*qt_qobjects)) {
         QQuickItem *item = qobject_cast<QQuickItem *>(object);
         if (item)
             items += item;