pass QStringList by const-ref

src/private/DockRegistry.cpp

@@ -428,7 +428,7 @@ QVector<QWindow *> DockRegistry::topLevels(bool excludeFloatingDocks) const
     return windows;
 }
 
-void DockRegistry::clear(QStringList affinities)
+void DockRegistry::clear(const QStringList &affinities)
 {
     // Clears everything
     clear(m_dockWidgets, m_mainWindows, affinities);
@@ -436,7 +436,7 @@ void DockRegistry::clear(QStringList affinities)
 
 void DockRegistry::clear(const DockWidgetBase::List &dockWidgets,
                          const MainWindowBase::List &mainWindows,
-                         QStringList affinities)
+                         const QStringList &affinities)
 {
     for (auto dw : qAsConst(dockWidgets)) {
         if (affinities.isEmpty() || affinitiesMatch(affinities, dw->affinities())) {

src/private/DockRegistry_p.h

@@ -103,14 +103,14 @@ public:
      * This is called before restoring a layout.
      * @param affinities if specified only closes dock widgets and main windows with the specified affinities
      */
-    void clear(QStringList affinities = {});
+    void clear(const QStringList &affinities = {});
 
     /**
      * @brief clear Overload that only clears the specified dockWidgets and main windows.
      */
     void clear(const DockWidgetBase::List &dockWidgets,
                const MainWindowBase::List &mainWindows,
-               QStringList affinities);
+               const QStringList &affinities);
 
     /**
      * @brief Ensures that all floating DockWidgets have a FloatingWindow as a window.

src/private/multisplitter/Item.cpp

@@ -1777,7 +1777,7 @@ bool ItemContainer::contains_recursive(const Item *item) const
     return false;
 }
 
-void ItemContainer::setChildren(const Item::List children, Qt::Orientation o)
+void ItemContainer::setChildren(const List &children, Qt::Orientation o)
 {
     d->m_children = children;
     for (Item *item : children)

src/private/multisplitter/Item_p.h

@@ -418,7 +418,7 @@ private:
     Item::List visibleChildren(bool includeBeingInserted = false) const;
     int usableLength() const;
     bool hasSingleVisibleItem() const;
-    void setChildren(const Item::List children, Qt::Orientation o);
+    void setChildren(const Item::List &children, Qt::Orientation o);
     void setOrientation(Qt::Orientation);
     int length() const;
     QRect rect() const;