6 files changed, 11 insertions, 11 deletions
diff --git a/src/printsupport/kernel/qpaintengine_preview.cpp b/src/printsupport/kernel/qpaintengine_preview.cpp
index 4c00333097..7179249677 100644
--- a/src/printsupport/kernel/qpaintengine_preview.cpp
+++ b/src/printsupport/kernel/qpaintengine_preview.cpp
@@ -69,8 +69,8 @@ QPreviewPaintEngine::QPreviewPaintEngine()
     : QPaintEngine(*(new QPreviewPaintEnginePrivate), PaintEngineFeatures(AllFeatures & ~ObjectBoundingModeGradients))
 {
     Q_D(QPreviewPaintEngine);
-    d->proxy_print_engine = 0;
-    d->proxy_paint_engine = 0;
+    d->proxy_print_engine = nullptr;
+    d->proxy_paint_engine = nullptr;
 }
 
 QPreviewPaintEngine::~QPreviewPaintEngine()
@@ -102,8 +102,8 @@ bool QPreviewPaintEngine::end()
     Q_D(QPreviewPaintEngine);
 
     delete d->painter;
-    d->painter = 0;
-    d->engine = 0;
+    d->painter = nullptr;
+    d->engine = nullptr;
     d->state = QPrinter::Idle;
     return true;
 }
diff --git a/src/printsupport/kernel/qplatformprintersupport.cpp b/src/printsupport/kernel/qplatformprintersupport.cpp
index 388dd5ff8e..e12a292aec 100644
--- a/src/printsupport/kernel/qplatformprintersupport.cpp
+++ b/src/printsupport/kernel/qplatformprintersupport.cpp
@@ -70,12 +70,12 @@ QPlatformPrinterSupport::~QPlatformPrinterSupport()
 
 QPrintEngine *QPlatformPrinterSupport::createNativePrintEngine(QPrinter::PrinterMode, const QString &)
 {
-    return 0;
+    return nullptr;
 }
 
 QPaintEngine *QPlatformPrinterSupport::createPaintEngine(QPrintEngine *, QPrinter::PrinterMode)
 {
-    return 0;
+    return nullptr;
 }
 
 QPrintDevice QPlatformPrinterSupport::createPrintDevice(QPlatformPrintDevice *device)
diff --git a/src/printsupport/kernel/qplatformprintplugin.cpp b/src/printsupport/kernel/qplatformprintplugin.cpp
index a80f369040..9a7656f7d6 100644
--- a/src/printsupport/kernel/qplatformprintplugin.cpp
+++ b/src/printsupport/kernel/qplatformprintplugin.cpp
@@ -60,12 +60,12 @@ QPlatformPrinterSupportPlugin::~QPlatformPrinterSupportPlugin()
 {
 }
 
-static QPlatformPrinterSupport *printerSupport = 0;
+static QPlatformPrinterSupport *printerSupport = nullptr;
 
 static void cleanupPrinterSupport()
 {
     delete printerSupport;
-    printerSupport = 0;
+    printerSupport = nullptr;
 }
 
 /*!
diff --git a/src/printsupport/kernel/qprintengine_pdf.cpp b/src/printsupport/kernel/qprintengine_pdf.cpp
index 080ff7ccf4..873e146eec 100644
--- a/src/printsupport/kernel/qprintengine_pdf.cpp
+++ b/src/printsupport/kernel/qprintengine_pdf.cpp
@@ -381,7 +381,7 @@ void QPdfPrintEnginePrivate::closePrintDevice()
     #endif
         fd = -1;
         delete outDevice;
-        outDevice = 0;
+        outDevice = nullptr;
     }
 }
 
diff --git a/src/printsupport/kernel/qprintengine_win.cpp b/src/printsupport/kernel/qprintengine_win.cpp
index ba234b3aae..a943d24cb1 100644
--- a/src/printsupport/kernel/qprintengine_win.cpp
+++ b/src/printsupport/kernel/qprintengine_win.cpp
@@ -1499,7 +1499,7 @@ QVariant QWin32PrintEngine::property(PrintEnginePropertyKey key) const
         QList<QVariant> out;
         const auto inputSlots = d->m_printDevice.supportedInputSlots();
         out.reserve(inputSlots.size());
-        for (const QPrint::InputSlot inputSlot : inputSlots)
+        for (const QPrint::InputSlot &inputSlot : inputSlots)
             out << QVariant(inputSlot.id == QPrint::CustomInputSlot ? inputSlot.windowsId : int(inputSlot.id));
         value = out;
         break;
diff --git a/src/printsupport/kernel/qprinter.cpp b/src/printsupport/kernel/qprinter.cpp
index dd0fa8639b..8a2cdcb34f 100644
--- a/src/printsupport/kernel/qprinter.cpp
+++ b/src/printsupport/kernel/qprinter.cpp
@@ -132,7 +132,7 @@ void QPrinterPrivate::initEngines(QPrinter::OutputFormat format, const QPrinterI
 {
     // Default to PdfFormat
     outputFormat = QPrinter::PdfFormat;
-    QPlatformPrinterSupport *ps = 0;
+    QPlatformPrinterSupport *ps = nullptr;
     QString printerName;
 
     // Only set NativeFormat if we have a valid plugin and printer to use