Refactoring.

src/app/puzzle/dialogs/dialogsavemanuallayout.cpp

@@ -87,7 +87,7 @@ DialogSaveManualLayout::DialogSaveManualLayout(vsizetype count, bool consoleExpo
 
     ui->lineEditFileName->setValidator(new QRegularExpressionValidator(QRegularExpression(*baseFilenameRegExp), this));
 
-    const QString mask = m_count > 1 ? fileName + '_' : fileName;
+    const QString mask = m_count > 1 ? fileName + '_'_L1 : fileName;
     if (not m_consoleExport)
     {
         ui->lineEditFileName->setText(mask);

src/app/puzzle/layout/vppiece.cpp

@@ -42,6 +42,12 @@
 #include <QPainter>
 #include <QPainterPath>
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 4, 0)
+#include "../vmisc/compatibility.h"
+#endif
+
+using namespace Qt::Literals::StringLiterals;
+
 QT_WARNING_PUSH
 QT_WARNING_DISABLE_CLANG("-Wmissing-prototypes")
 QT_WARNING_DISABLE_INTEL(1418)
@@ -170,7 +176,7 @@ auto VPPiece::GetUniqueID() const -> QString
 
     if (m_copyNumber > 1)
     {
-        id = id + '_' + QString::number(m_copyNumber);
+        id = id + '_'_L1 + QString::number(m_copyNumber);
     }
 
     return id;

src/app/valentina/dialogs/dialogincrements.cpp

@@ -1593,7 +1593,7 @@ void DialogIncrements::SaveIncrName(const QString &text)
         QString name = newName;
         do
         {
-            name = name + '_' + QString::number(num);
+            name = name + '_'_L1 + QString::number(num);
             num++;
         } while (not m_data->IsUnique(name));
         newName = name;

src/app/valentina/dialogs/dialogsavelayout.cpp

@@ -92,7 +92,7 @@ DialogSaveLayout::DialogSaveLayout(int count, Draw mode, const QString &fileName
 
     ui->lineEditFileName->setValidator(new QRegularExpressionValidator(QRegularExpression(*baseFilenameRegExp), this));
 
-    const QString mask = fileName + '_';
+    const QString mask = fileName + '_'_L1;
     if (VApplication::IsGUIMode())
     {
         ui->lineEditFileName->setText(mask);

src/libs/vdxf/vdxfengine.cpp

@@ -60,6 +60,12 @@
 #include "../vmisc/def.h"
 #include "dxiface.h"
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 4, 0)
+#include "../vmisc/compatibility.h"
+#endif
+
+using namespace Qt::Literals::StringLiterals;
+
 namespace
 {
 const qreal AAMATextHeight = 2.5;
@@ -726,7 +732,7 @@ auto VDxfEngine::ExportToAAMA(const QVector<VLayoutPiece> &details) -> bool
         QString blockName = detail.GetName();
         if (m_version <= DRW::AC1009)
         {
-            blockName.replace(' ', '_');
+            blockName.replace(' '_L1, '_'_L1);
         }
 
         detailBlock->name = blockName.toStdString();
@@ -958,7 +964,7 @@ auto VDxfEngine::ExportToASTM(const QVector<VLayoutPiece> &details) -> bool
         QString blockName = detail.GetName();
         if (m_version <= DRW::AC1009)
         {
-            blockName.replace(' ', '_');
+            blockName.replace(' '_L1, '_'_L1);
         }
 
         detailBlock->name = blockName.toStdString();

src/libs/vgeometry/vabstractcubicbezierpath.cpp

@@ -346,5 +346,5 @@ void VAbstractCubicBezierPath::CreateAlias()
         return;
     }
 
-    SetAlias(splPath + '_' + aliasSuffix);
+    SetAlias(splPath + '_'_L1 + aliasSuffix);
 }

src/libs/vlayout/vlayoutpiece.cpp

@@ -711,7 +711,7 @@ auto VLayoutPiece::GetUniqueID() const -> QString
 
     if (not d->m_gradationId.isEmpty())
     {
-        id = id + '_' + d->m_gradationId;
+        id = id + '_'_L1 + d->m_gradationId;
     }
 
     return id;

src/libs/vmisc/def.cpp

@@ -103,8 +103,8 @@ void InitLanguageList(QComboBox *combobox)
     for (auto locale : fileNames)
     {
         // get locale extracted by filename           "valentina_de_De.qm"
-        locale.truncate(locale.lastIndexOf('.'));  // "valentina_de_De"
-        locale.remove(0, locale.indexOf('_') + 1); // "de_De"
+        locale.truncate(locale.lastIndexOf('.'_L1));  // "valentina_de_De"
+        locale.remove(0, locale.indexOf('_'_L1) + 1); // "de_De"
 
         if (locale.startsWith("ru"_L1))
         {

src/libs/vmisc/vabstractapplication.cpp

@@ -328,7 +328,7 @@ void VAbstractApplication::LoadTranslation(QString locale)
     installTranslator(appTranslator);
 
     pmsTranslator = new QTranslator(this);
-    LoadQM(pmsTranslator, QStringLiteral("measurements_") + Settings()->GetPMSystemCode() + '_', locale, appQmDir);
+    LoadQM(pmsTranslator, QStringLiteral("measurements_") + Settings()->GetPMSystemCode() + '_'_L1, locale, appQmDir);
     installTranslator(pmsTranslator);
 
     InitTrVars(); // Very important do it after load QM files.