Mark the module as free of Q_FOREACH, except where it isn't

The density of Q_FOREACH uses is high here, too high for this author,
unfamiliar with this module, to tackle in a short amount of time. But
they're concentrated in just a few TUs, so pick a different strategy:

Mark the whole module with QT_NO_FOREACH, to prevent new uses from
creeping in, and whitelist the affected TUs by #undef'ing
QT_NO_FOREACH locally, at the top of each file. For TUs that are part
of a larger executable, this requires these files to be compiled
separately, so add them to NO_PCH_SOURCES (which implies
NO_UNITY_BUILD_SOURCES, too). Created QTBUG-115807 to keep track of
this.

Ported one that was trivial and where whitelisting of the file with a
single Q_FOREACH would have been more work than directly fixing it.

Task-number: QTBUG-115807
Change-Id: I2fa6c740e35039baf34115af7d69d6c420e4de10
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>

.cmake.conf

@@ -1,3 +1,4 @@
 set(QT_REPO_MODULE_VERSION "6.7.0")
 set(QT_REPO_MODULE_PRERELEASE_VERSION_SEGMENT "alpha1")
 set(QT_EXTRA_INTERNAL_TARGET_DEFINES "QT_NO_AS_CONST=1")
+list(APPEND QT_EXTRA_INTERNAL_TARGET_DEFINES "QT_NO_FOREACH=1")

src/datavisualization/CMakeLists.txt

@@ -82,6 +82,20 @@ qt_internal_add_module(DataVisualization
         utils/vertexindexer.cpp utils/vertexindexer_p.h
     DEFINES
         QT_NO_CONTEXTLESS_CONNECT
+    NO_PCH_SOURCES
+        # undef QT_NO_FOREACH:
+        engine/abstract3dcontroller.cpp
+        engine/abstract3drenderer.cpp
+        engine/axisrendercache.cpp
+        engine/bars3dcontroller.cpp
+        engine/bars3drenderer.cpp
+        engine/q3dscatter.cpp
+        engine/q3dsurface.cpp
+        engine/scatter3dcontroller.cpp
+        engine/scatter3drenderer.cpp
+        engine/surface3dcontroller.cpp
+        engine/surface3drenderer.cpp
+        # end undef QT_NO_FOREACH
     INCLUDE_DIRECTORIES
         axis
         data

src/datavisualization/engine/abstract3dcontroller.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "abstractdeclarativeinterface_p.h"
 #include "abstract3dcontroller_p.h"
 #include "qabstract3daxis_p.h"

src/datavisualization/engine/abstract3drenderer.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "abstract3drenderer_p.h"
 #include "texturehelper_p.h"
 #include "q3dcamera_p.h"

src/datavisualization/engine/axisrendercache.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "axisrendercache_p.h"
 
 #include <QtGui/QFontMetrics>

src/datavisualization/engine/bars3dcontroller.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "bars3dcontroller_p.h"
 #include "bars3drenderer_p.h"
 #include "qvalue3daxis_p.h"

src/datavisualization/engine/bars3drenderer.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "bars3drenderer_p.h"
 #include "q3dcamera_p.h"
 #include "shaderhelper_p.h"

src/datavisualization/engine/q3dscatter.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "q3dscatter.h"
 #include "q3dscatter_p.h"
 

src/datavisualization/engine/q3dsurface.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "q3dsurface.h"
 #include "q3dsurface_p.h"
 

src/datavisualization/engine/scatter3dcontroller.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "scatter3dcontroller_p.h"
 #include "scatter3drenderer_p.h"
 #include "qvalue3daxis_p.h"

src/datavisualization/engine/scatter3drenderer.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "scatter3drenderer_p.h"
 #include "q3dcamera_p.h"
 #include "shaderhelper_p.h"

src/datavisualization/engine/surface3dcontroller.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "surface3dcontroller_p.h"
 #include "surface3drenderer_p.h"
 #include "qvalue3daxis_p.h"

src/datavisualization/engine/surface3drenderer.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "surface3drenderer_p.h"
 #include "q3dcamera_p.h"
 #include "shaderhelper_p.h"

src/datavisualizationqml/CMakeLists.txt

@@ -44,6 +44,8 @@ qt_internal_add_qml_module(DataVisualizationQml
         enumtostringmap.cpp enumtostringmap_p.h
         foreigntypes_p.h
         glstatestore.cpp glstatestore_p.h
+    NO_PCH_SOURCES
+        declarativetheme.cpp # undef QT_NO_FOREACH
     DEFINES
         QT_NO_CONTEXTLESS_CONNECT
     QML_FILES

src/datavisualizationqml/abstractdeclarative.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "abstractdeclarative_p.h"
 #include "declarativetheme_p.h"
 #include "declarativerendernode_p.h"

src/datavisualizationqml/declarativetheme.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "declarativetheme_p.h"
 
 QT_BEGIN_NAMESPACE

tests/manual/barstest/CMakeLists.txt

@@ -11,6 +11,8 @@ qt_internal_add_manual_test(barstest
         buttonwrapper.cpp buttonwrapper.h
         custominputhandler.cpp custominputhandler.h
         main.cpp
+    NO_PCH_SOURCES
+        chart.cpp # undef QT_NO_FOREACH
     )
 target_link_libraries(barstest PUBLIC
     Qt::Gui

tests/manual/barstest/chart.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "chart.h"
 #include "custominputhandler.h"
 #include <QtDataVisualization/qcategory3daxis.h>

tests/manual/itemmodeltest/main.cpp

@@ -208,8 +208,8 @@ void GraphDataGenerator::changeSelectedButtonClicked()
 {
     // Change all selected cells to a random value 1-10
     QVariant value = QVariant::fromValue(QRandomGenerator::global()->bounded(10.0) + 1);
-    QList<QTableWidgetItem *> selectedItems = m_tableWidget->selectedItems();
-    foreach (QTableWidgetItem *item, selectedItems) {
+    const QList<QTableWidgetItem *> selectedItems = m_tableWidget->selectedItems();
+    for (QTableWidgetItem *item : selectedItems) {
         QString oldData = item->data(Qt::DisplayRole).toString();
         item->setData(Qt::DisplayRole,
                       oldData.left(5)

tests/manual/scattertest/CMakeLists.txt

@@ -8,6 +8,8 @@ qt_internal_add_manual_test(scattertest
     SOURCES
         main.cpp
         scatterchart.cpp scatterchart.h
+    NO_PCH_SOURCES
+        scatterchart.cpp # undef QT_NO_FOREACH
     )
 target_link_libraries(scattertest PUBLIC
     Qt::Gui

tests/manual/scattertest/scatterchart.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "scatterchart.h"
 #include <QtDataVisualization/qscatterdataproxy.h>
 #include <QtDataVisualization/qscatter3dseries.h>

tests/manual/surfacetest/CMakeLists.txt

@@ -10,6 +10,8 @@ qt_internal_add_manual_test(surfacetest
         checkboxwrapper.cpp checkboxwrapper.h
         graphmodifier.cpp graphmodifier.h
         main.cpp
+    NO_PCH_SOURCES
+        graphmodifier.cpp # undef QT_NO_FOREACH
     )
 target_link_libraries(surfacetest PUBLIC
     Qt::Gui

tests/manual/surfacetest/graphmodifier.cpp

@@ -1,6 +1,8 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
+#undef QT_NO_FOREACH // this file contains unported legacy Q_FOREACH uses
+
 #include "graphmodifier.h"
 #include <QtDataVisualization/QValue3DAxis>
 #include <QtDataVisualization/QSurfaceDataProxy>