Printsupport: use _L1 for for creating Latin-1 string literals

Task-number: QTBUG-98434
Change-Id: I415132ed381c25313e7fcccd050e522667eb6c22
Reviewed-by: Volker Hilsheimer <[email protected]>

12 files changed, 75 insertions, 51 deletions

diff --git a/src/plugins/printsupport/cups/main.cpp b/src/plugins/printsupport/cups/main.cpp
index cf263a7f521..1a03b064d03 100644
--- a/src/plugins/printsupport/cups/main.cpp
+++ b/src/plugins/printsupport/cups/main.cpp
@@ -45,6 +45,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QCupsPrinterSupportPlugin : public QPlatformPrinterSupportPlugin
 {
     Q_OBJECT
@@ -62,7 +64,7 @@ QStringList QCupsPrinterSupportPlugin::keys() const
 
 QPlatformPrinterSupport *QCupsPrinterSupportPlugin::create(const QString &key)
 {
-    if (key.compare(key, QLatin1String("cupsprintersupport"), Qt::CaseInsensitive) == 0)
+    if (key.compare(key, "cupsprintersupport"_L1, Qt::CaseInsensitive) == 0)
         return new QCupsPrinterSupport;
     return 0;
 }
diff --git a/src/printsupport/dialogs/qpagesetupdialog_unix.cpp b/src/printsupport/dialogs/qpagesetupdialog_unix.cpp
index a400ae3354e..4f2778cd9ad 100644
--- a/src/printsupport/dialogs/qpagesetupdialog_unix.cpp
+++ b/src/printsupport/dialogs/qpagesetupdialog_unix.cpp
@@ -60,6 +60,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 extern QMarginsF qt_convertMargins(const QMarginsF &margins, QPageLayout::Unit fromUnits, QPageLayout::Unit toUnits);
 
 // Disabled until we have support for papersources on unix
@@ -157,7 +159,7 @@ protected:
             font.setPointSizeF(font.pointSizeF()*0.25);
             p.setFont(font);
             p.setPen(palette().color(QPalette::Dark));
-            QString text(QLatin1String("Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi."));
+            QString text("Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi."_L1);
             for (int i=0; i<3; ++i)
                 text += text;
 
diff --git a/src/printsupport/dialogs/qprintdialog_mac.mm b/src/printsupport/dialogs/qprintdialog_mac.mm
index 1bcabfb8274..190cec1a2d7 100644
--- a/src/printsupport/dialogs/qprintdialog_mac.mm
+++ b/src/printsupport/dialogs/qprintdialog_mac.mm
@@ -53,6 +53,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 extern qreal qt_pointMultiplier(QPageLayout::Unit unit);
 
 class QPrintDialogPrivate : public QAbstractPrintDialogPrivate
@@ -135,7 +137,7 @@ QT_USE_NAMESPACE
             UInt8 localFile[2048];  // Assuming there's a POSIX file system here.
             CFURLGetFileSystemRepresentation(file, true, localFile, sizeof(localFile));
             auto outputFile = QFileInfo(QString::fromUtf8(reinterpret_cast<const char *>(localFile)));
-            if (outputFile.suffix() == QLatin1String("pdf"))
+            if (outputFile.suffix() == "pdf"_L1)
                 printer->setOutputFileName(outputFile.absoluteFilePath());
             else
                 qWarning() << "Can not print to file type" << outputFile.suffix();
@@ -144,7 +146,7 @@ QT_USE_NAMESPACE
             auto documentName = printer->docName();
             if (documentName.isEmpty())
                 documentName = QGuiApplication::applicationDisplayName();
-            auto fileName = printPreviews.filePath(QString(QLatin1String("%1.pdf")).arg(documentName));
+            auto fileName = printPreviews.filePath(QString("%1.pdf"_L1).arg(documentName));
             printer->setOutputFileName(fileName);
             // Ideally we would have a callback when the PDF engine is done writing
             // to the file, and open Preview in response to that. Lacking that, we
diff --git a/src/printsupport/dialogs/qprintdialog_unix.cpp b/src/printsupport/dialogs/qprintdialog_unix.cpp
index 57e8382956b..e13ee58e479 100644
--- a/src/printsupport/dialogs/qprintdialog_unix.cpp
+++ b/src/printsupport/dialogs/qprintdialog_unix.cpp
@@ -126,6 +126,8 @@ static void initResources()
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 class QPrintPropertiesDialog : public QDialog
 {
     Q_OBJECT
@@ -633,9 +635,9 @@ void QPrintDialogPrivate::init()
     bottom = new QWidget(q);
     options.setupUi(bottom);
     options.color->setIconSize(QSize(32, 32));
-    options.color->setIcon(QIcon(QLatin1String(":/qt-project.org/dialogs/qprintdialog/images/status-color.png")));
+    options.color->setIcon(QIcon(":/qt-project.org/dialogs/qprintdialog/images/status-color.png"_L1));
     options.grayscale->setIconSize(QSize(32, 32));
-    options.grayscale->setIcon(QIcon(QLatin1String(":/qt-project.org/dialogs/qprintdialog/images/status-gray-scale.png")));
+    options.grayscale->setIcon(QIcon(":/qt-project.org/dialogs/qprintdialog/images/status-gray-scale.png"_L1));
 
 #if QT_CONFIG(cups)
     // Add Page Set widget if CUPS is available
diff --git a/src/printsupport/dialogs/qprintdialog_win.cpp b/src/printsupport/dialogs/qprintdialog_win.cpp
index 783ef242ceb..f8c4d61c324 100644
--- a/src/printsupport/dialogs/qprintdialog_win.cpp
+++ b/src/printsupport/dialogs/qprintdialog_win.cpp
@@ -59,6 +59,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 //extern void qt_win_eatMouseMove();
 
 class QPrintDialogPrivate : public QAbstractPrintDialogPrivate
@@ -164,8 +166,8 @@ static void qt_win_read_back_PRINTDLGEX(PRINTDLGEX *pd, QPrintDialog *pdlg, QPri
     d->engine->setGlobalDevMode(pd->hDevNames, pd->hDevMode);
 
     if (d->ep->printToFile && d->ep->fileName.isEmpty())
-        d->ep->fileName = QLatin1String("FILE:");
-    else if (!d->ep->printToFile && d->ep->fileName == QLatin1String("FILE:"))
+        d->ep->fileName = "FILE:"_L1;
+    else if (!d->ep->printToFile && d->ep->fileName == "FILE:"_L1)
         d->ep->fileName.clear();
 }
 
diff --git a/src/printsupport/dialogs/qprintpreviewdialog.cpp b/src/printsupport/dialogs/qprintpreviewdialog.cpp
index 1327f648fbd..db2545065f6 100644
--- a/src/printsupport/dialogs/qprintpreviewdialog.cpp
+++ b/src/printsupport/dialogs/qprintpreviewdialog.cpp
@@ -75,6 +75,8 @@ static void initResources()
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 namespace {
 class QPrintPreviewMainWindow : public QMainWindow
 {
@@ -338,7 +340,7 @@ void QPrintPreviewDialogPrivate::init(QPrinter *_printer)
 
     QString caption = QCoreApplication::translate("QPrintPreviewDialog", "Print Preview");
     if (!printer->docName().isEmpty())
-        caption += QLatin1String(": ") + printer->docName();
+        caption += ": "_L1 + printer->docName();
     q->setWindowTitle(caption);
 
     if (!printer->isValid()
@@ -352,10 +354,10 @@ void QPrintPreviewDialogPrivate::init(QPrinter *_printer)
 
 static inline void qt_setupActionIcon(QAction *action, QLatin1String name)
 {
-    QLatin1String imagePrefix(":/qt-project.org/dialogs/qprintpreviewdialog/images/");
+    const auto imagePrefix = ":/qt-project.org/dialogs/qprintpreviewdialog/images/"_L1;
     QIcon icon = QIcon::fromTheme(name);
-    icon.addFile(imagePrefix + name + QLatin1String("-24.png"), QSize(24, 24));
-    icon.addFile(imagePrefix + name + QLatin1String("-32.png"), QSize(32, 32));
+    icon.addFile(imagePrefix + name + "-24.png"_L1, QSize(24, 24));
+    icon.addFile(imagePrefix + name + "-32.png"_L1, QSize(32, 32));
     action->setIcon(icon);
 }
 
@@ -370,30 +372,30 @@ void QPrintPreviewDialogPrivate::setupActions()
     prevPageAction = navGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Previous page"));
     firstPageAction = navGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "First page"));
     lastPageAction = navGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Last page"));
-    qt_setupActionIcon(nextPageAction, QLatin1String("go-next"));
-    qt_setupActionIcon(prevPageAction, QLatin1String("go-previous"));
-    qt_setupActionIcon(firstPageAction, QLatin1String("go-first"));
-    qt_setupActionIcon(lastPageAction, QLatin1String("go-last"));
+    qt_setupActionIcon(nextPageAction, "go-next"_L1);
+    qt_setupActionIcon(prevPageAction, "go-previous"_L1);
+    qt_setupActionIcon(firstPageAction, "go-first"_L1);
+    qt_setupActionIcon(lastPageAction, "go-last"_L1);
     QObject::connect(navGroup, SIGNAL(triggered(QAction*)), q, SLOT(_q_navigate(QAction*)));
 
 
     fitGroup = new QActionGroup(q);
     fitWidthAction = fitGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Fit width"));
     fitPageAction = fitGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Fit page"));
-    fitWidthAction->setObjectName(QLatin1String("fitWidthAction"));
-    fitPageAction->setObjectName(QLatin1String("fitPageAction"));
+    fitWidthAction->setObjectName("fitWidthAction"_L1);
+    fitPageAction->setObjectName("fitPageAction"_L1);
     fitWidthAction->setCheckable(true);
     fitPageAction->setCheckable(true);
-    qt_setupActionIcon(fitWidthAction, QLatin1String("zoom-fit-width"));
-    qt_setupActionIcon(fitPageAction, QLatin1String("zoom-fit-page"));
+    qt_setupActionIcon(fitWidthAction, "zoom-fit-width"_L1);
+    qt_setupActionIcon(fitPageAction, "zoom-fit-page"_L1);
     QObject::connect(fitGroup, SIGNAL(triggered(QAction*)), q, SLOT(_q_fit(QAction*)));
 
     // Zoom
     zoomGroup = new QActionGroup(q);
     zoomInAction = zoomGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Zoom in"));
     zoomOutAction = zoomGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Zoom out"));
-    qt_setupActionIcon(zoomInAction, QLatin1String("zoom-in"));
-    qt_setupActionIcon(zoomOutAction, QLatin1String("zoom-out"));
+    qt_setupActionIcon(zoomInAction, "zoom-in"_L1);
+    qt_setupActionIcon(zoomOutAction, "zoom-out"_L1);
 
     // Portrait/Landscape
     orientationGroup = new QActionGroup(q);
@@ -401,8 +403,8 @@ void QPrintPreviewDialogPrivate::setupActions()
     landscapeAction = orientationGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Landscape"));
     portraitAction->setCheckable(true);
     landscapeAction->setCheckable(true);
-    qt_setupActionIcon(portraitAction, QLatin1String("layout-portrait"));
-    qt_setupActionIcon(landscapeAction, QLatin1String("layout-landscape"));
+    qt_setupActionIcon(portraitAction, "layout-portrait"_L1);
+    qt_setupActionIcon(landscapeAction, "layout-landscape"_L1);
     QObject::connect(portraitAction, SIGNAL(triggered(bool)), preview, SLOT(setPortraitOrientation()));
     QObject::connect(landscapeAction, SIGNAL(triggered(bool)), preview, SLOT(setLandscapeOrientation()));
 
@@ -411,12 +413,12 @@ void QPrintPreviewDialogPrivate::setupActions()
     singleModeAction = modeGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Show single page"));
     facingModeAction = modeGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Show facing pages"));
     overviewModeAction = modeGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Show overview of all pages"));
-    qt_setupActionIcon(singleModeAction, QLatin1String("view-pages-single"));
-    qt_setupActionIcon(facingModeAction, QLatin1String("view-pages-facing"));
-    qt_setupActionIcon(overviewModeAction, QLatin1String("view-pages-overview"));
-    singleModeAction->setObjectName(QLatin1String("singleModeAction"));
-    facingModeAction->setObjectName(QLatin1String("facingModeAction"));
-    overviewModeAction->setObjectName(QLatin1String("overviewModeAction"));
+    qt_setupActionIcon(singleModeAction, "view-pages-single"_L1);
+    qt_setupActionIcon(facingModeAction, "view-pages-facing"_L1);
+    qt_setupActionIcon(overviewModeAction, "view-pages-overview"_L1);
+    singleModeAction->setObjectName("singleModeAction"_L1);
+    facingModeAction->setObjectName("facingModeAction"_L1);
+    overviewModeAction->setObjectName("overviewModeAction"_L1);
 
     singleModeAction->setCheckable(true);
     facingModeAction->setCheckable(true);
@@ -427,8 +429,8 @@ void QPrintPreviewDialogPrivate::setupActions()
     printerGroup = new QActionGroup(q);
     printAction = printerGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Print"));
     pageSetupAction = printerGroup->addAction(QCoreApplication::translate("QPrintPreviewDialog", "Page setup"));
-    qt_setupActionIcon(printAction, QLatin1String("printer"));
-    qt_setupActionIcon(pageSetupAction, QLatin1String("page-setup"));
+    qt_setupActionIcon(printAction, "printer"_L1);
+    qt_setupActionIcon(pageSetupAction, "page-setup"_L1);
     QObject::connect(printAction, SIGNAL(triggered(bool)), q, SLOT(_q_print()));
     QObject::connect(pageSetupAction, SIGNAL(triggered(bool)), q, SLOT(_q_pageSetup()));
 
@@ -574,7 +576,7 @@ void QPrintPreviewDialogPrivate::_q_print()
 #if defined(Q_OS_WIN) || defined(Q_OS_MAC)
     if (printer->outputFormat() != QPrinter::NativeFormat) {
         QString title = QCoreApplication::translate("QPrintPreviewDialog", "Export to PDF");
-        QString suffix = QLatin1String(".pdf");
+        QString suffix = ".pdf"_L1;
         QString fileName;
 #if QT_CONFIG(filedialog)
         fileName = QFileDialog::getSaveFileName(q, title, printer->outputFileName(), u'*' + suffix);
diff --git a/src/printsupport/kernel/qcups.cpp b/src/printsupport/kernel/qcups.cpp
index c1af1f19a9c..09b83888667 100644
--- a/src/printsupport/kernel/qcups.cpp
+++ b/src/printsupport/kernel/qcups.cpp
@@ -44,6 +44,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QT_IMPL_METATYPE_EXTERN_TAGGED(QCUPSSupport::JobHoldUntil,
                                QCUPSSupport__JobHoldUntil)
 QT_IMPL_METATYPE_EXTERN_TAGGED(QCUPSSupport::BannerPage,
@@ -129,17 +131,17 @@ static inline QString jobHoldToString(const QCUPSSupport::JobHoldUntil jobHold,
 
 QCUPSSupport::JobHoldUntilWithTime QCUPSSupport::parseJobHoldUntil(const QString &jobHoldUntil)
 {
-    if (jobHoldUntil == QLatin1String("indefinite")) {
+    if (jobHoldUntil == "indefinite"_L1) {
         return { QCUPSSupport::Indefinite, QTime() };
-    } else if (jobHoldUntil == QLatin1String("day-time")) {
+    } else if (jobHoldUntil == "day-time"_L1) {
         return { QCUPSSupport::DayTime, QTime() };
-    } else if (jobHoldUntil == QLatin1String("night")) {
+    } else if (jobHoldUntil == "night"_L1) {
         return { QCUPSSupport::Night, QTime() };
-    } else if (jobHoldUntil == QLatin1String("second-shift")) {
+    } else if (jobHoldUntil == "second-shift"_L1) {
         return { QCUPSSupport::SecondShift, QTime() };
-    } else if (jobHoldUntil == QLatin1String("third-shift")) {
+    } else if (jobHoldUntil == "third-shift"_L1) {
         return { QCUPSSupport::ThirdShift, QTime() };
-    } else if (jobHoldUntil == QLatin1String("weekend")) {
+    } else if (jobHoldUntil == "weekend"_L1) {
         return { QCUPSSupport::Weekend, QTime() };
     }
 
@@ -216,13 +218,13 @@ static inline QString bannerPageToString(const QCUPSSupport::BannerPage bannerPa
 
 static inline QCUPSSupport::BannerPage stringToBannerPage(const QString &bannerPage)
 {
-    if (bannerPage == QLatin1String("none")) return QCUPSSupport::NoBanner;
-    else if (bannerPage == QLatin1String("standard")) return QCUPSSupport::Standard;
-    else if (bannerPage == QLatin1String("unclassified")) return QCUPSSupport::Unclassified;
-    else if (bannerPage == QLatin1String("confidential")) return QCUPSSupport::Confidential;
-    else if (bannerPage == QLatin1String("classified")) return QCUPSSupport::Classified;
-    else if (bannerPage == QLatin1String("secret")) return QCUPSSupport::Secret;
-    else if (bannerPage == QLatin1String("topsecret")) return QCUPSSupport::TopSecret;
+    if (bannerPage == "none"_L1) return QCUPSSupport::NoBanner;
+    else if (bannerPage == "standard"_L1) return QCUPSSupport::Standard;
+    else if (bannerPage == "unclassified"_L1) return QCUPSSupport::Unclassified;
+    else if (bannerPage == "confidential"_L1) return QCUPSSupport::Confidential;
+    else if (bannerPage == "classified"_L1) return QCUPSSupport::Classified;
+    else if (bannerPage == "secret"_L1) return QCUPSSupport::Secret;
+    else if (bannerPage == "topsecret"_L1) return QCUPSSupport::TopSecret;
 
     return QCUPSSupport::NoBanner;
 }
diff --git a/src/printsupport/kernel/qplatformprintplugin.cpp b/src/printsupport/kernel/qplatformprintplugin.cpp
index 6f470b835ce..6e2a76ebb2c 100644
--- a/src/printsupport/kernel/qplatformprintplugin.cpp
+++ b/src/printsupport/kernel/qplatformprintplugin.cpp
@@ -48,6 +48,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 #if defined(Q_OS_MACOS)
 Q_IMPORT_PLUGIN(QCocoaPrinterSupportPlugin)
 #elif defined(Q_OS_WIN)
@@ -55,7 +57,7 @@ Q_IMPORT_PLUGIN(QWindowsPrinterSupportPlugin)
 #endif
 
 Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
-    (QPlatformPrinterSupportFactoryInterface_iid, QLatin1String("/printsupport"), Qt::CaseInsensitive))
+    (QPlatformPrinterSupportFactoryInterface_iid, "/printsupport"_L1, Qt::CaseInsensitive))
 
 QPlatformPrinterSupportPlugin::QPlatformPrinterSupportPlugin(QObject *parent)
     : QObject(parent)
diff --git a/src/printsupport/kernel/qprinter.cpp b/src/printsupport/kernel/qprinter.cpp
index d320accad05..08cbdac05c4 100644
--- a/src/printsupport/kernel/qprinter.cpp
+++ b/src/printsupport/kernel/qprinter.cpp
@@ -61,6 +61,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 #define ABORT_IF_ACTIVE(location) \
     if (d->printEngine->printerState() == QPrinter::Active) { \
         qWarning("%s: Cannot be changed while printer is active", location); \
@@ -749,7 +751,7 @@ void QPrinter::setOutputFileName(const QString &fileName)
     ABORT_IF_ACTIVE("QPrinter::setOutputFileName");
 
     QFileInfo fi(fileName);
-    if (!fi.suffix().compare(QLatin1String("pdf"), Qt::CaseInsensitive))
+    if (!fi.suffix().compare("pdf"_L1, Qt::CaseInsensitive))
         setOutputFormat(QPrinter::PdfFormat);
     else if (fileName.isEmpty())
         setOutputFormat(QPrinter::NativeFormat);
diff --git a/src/printsupport/platform/macos/qcocoaprintersupport.mm b/src/printsupport/platform/macos/qcocoaprintersupport.mm
index a9c536964df..02389efdfd7 100644
--- a/src/printsupport/platform/macos/qcocoaprintersupport.mm
+++ b/src/printsupport/platform/macos/qcocoaprintersupport.mm
@@ -57,6 +57,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QCocoaPrinterSupport::QCocoaPrinterSupport()
 { }
 
@@ -122,7 +124,7 @@ public:
 
 QPlatformPrinterSupport *QCocoaPrinterSupportPlugin::create(const QString &key)
 {
-    if (key.compare(key, QLatin1String("cocoaprintersupport"), Qt::CaseInsensitive) != 0)
+    if (key.compare(key, "cocoaprintersupport"_L1, Qt::CaseInsensitive) != 0)
         return 0;
 
     return new QCocoaPrinterSupport();
diff --git a/src/printsupport/platform/windows/qwindowsprinterinfo.cpp b/src/printsupport/platform/windows/qwindowsprinterinfo.cpp
index cd41ab730e5..423707f303a 100644
--- a/src/printsupport/platform/windows/qwindowsprinterinfo.cpp
+++ b/src/printsupport/platform/windows/qwindowsprinterinfo.cpp
@@ -46,6 +46,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 #ifndef QT_NO_PRINTER
 
 extern QPrinter::PaperSize mapDevmodePaperSize(int s);
@@ -78,7 +80,7 @@ extern QPrinter::PaperSize mapDevmodePaperSize(int s);
 
 //QPrinterInfo QPrinterInfo::defaultPrinter()
 //{
-//    QString noPrinters(QLatin1String("qt_no_printers"));
+//    QString noPrinters("qt_no_printers"_L1);
 //    wchar_t buffer[256];
 //    GetProfileString(L"windows", L"device", (wchar_t*)noPrinters.utf16(), buffer, 256);
 //    QString output = QString::fromWCharArray(buffer);
diff --git a/src/printsupport/platform/windows/qwindowsprintersupport.cpp b/src/printsupport/platform/windows/qwindowsprintersupport.cpp
index 8d8322dca9a..1950a3401af 100644
--- a/src/printsupport/platform/windows/qwindowsprintersupport.cpp
+++ b/src/printsupport/platform/windows/qwindowsprintersupport.cpp
@@ -52,6 +52,8 @@
 
 QT_BEGIN_NAMESPACE
 
+using namespace Qt::StringLiterals;
+
 QWindowsPrinterSupport::QWindowsPrinterSupport()
     : QPlatformPrinterSupport()
 {
@@ -98,7 +100,7 @@ public:
 
 QPlatformPrinterSupport *QWindowsPrinterSupportPlugin::create(const QString &key)
 {
-    if (key.compare(key, QLatin1String("windowsprintsupport"), Qt::CaseInsensitive) == 0)
+    if (key.compare(key, "windowsprintsupport"_L1, Qt::CaseInsensitive) == 0)
         return new QWindowsPrinterSupport;
     return nullptr;
 }