improve passstuffbyref return analysis

Change-Id: I4258bcc97273d8bb7a8c4879fac02a427f76e18c Reviewed-on: https://gerrit.libreoffice.org/27317 Tested-by: Jenkins <ci@libreoffice.org> Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
author: Noel Grandin <noel@peralex.com> 2016-07-18 09:22:27 +0200
committer: Noel Grandin <noelgrandin@gmail.com> 2016-07-27 06:48:25 +0000
commit: 508c95f1b655d9cfa6be37a5a9de9aff6fd383bf (patch)
tree: d1c8626818cbf26a699875ae2d82f751a1657e92
parent: 9f4af777a832d8a0b9a21d793d421fa6228131e0 (diff)
366 files changed, 693 insertions, 620 deletions
diff --git a/UnoControls/source/controls/framecontrol.cxx b/UnoControls/source/controls/framecontrol.cxx
index 658974f3df31..091a86dec91d 100644
--- a/UnoControls/source/controls/framecontrol.cxx
+++ b/UnoControls/source/controls/framecontrol.cxx
@@ -491,7 +491,7 @@ void FrameControl::impl_deleteFrame()
 
 //  private method
 
-const Sequence< Property > FrameControl::impl_getStaticPropertyDescriptor()
+const Sequence< Property >& FrameControl::impl_getStaticPropertyDescriptor()
 {
     // All Properties of this implementation. The array must be sorted!
     static const Property pPropertys[PROPERTY_COUNT] =
diff --git a/UnoControls/source/inc/framecontrol.hxx b/UnoControls/source/inc/framecontrol.hxx
index fa17ebfa6446..e98fdecc8fa9 100644
--- a/UnoControls/source/inc/framecontrol.hxx
+++ b/UnoControls/source/inc/framecontrol.hxx
@@ -205,7 +205,7 @@ private:
 
     void impl_deleteFrame();
 
-    static const css::uno::Sequence< css::beans::Property > impl_getStaticPropertyDescriptor();
+    static const css::uno::Sequence< css::beans::Property >& impl_getStaticPropertyDescriptor();
 
 //  private variables
 
diff --git a/basctl/source/basicide/baside2.cxx b/basctl/source/basicide/baside2.cxx
index dcbbb3f817de..1a4ad3e4670f 100644
--- a/basctl/source/basicide/baside2.cxx
+++ b/basctl/source/basicide/baside2.cxx
@@ -190,7 +190,7 @@ ModulWindow::ModulWindow (ModulWindowLayout* pParent, ScriptDocument const& rDoc
     SetBackground();
 }
 
-SbModuleRef ModulWindow::XModule()
+SbModuleRef const & ModulWindow::XModule()
 {
     // ModuleWindows can now be created as a result of the
     // modules getting created via the api. This is a result of an
diff --git a/basctl/source/basicide/baside2.hxx b/basctl/source/basicide/baside2.hxx
index ba5caba27223..23d84770aac3 100644
--- a/basctl/source/basicide/baside2.hxx
+++ b/basctl/source/basicide/baside2.hxx
@@ -314,7 +314,7 @@ private:
     static void         GoOnTop();
 
     sal_Int32           FormatAndPrint( Printer* pPrinter, sal_Int32 nPage = -1 );
-    SbModuleRef         XModule();
+    SbModuleRef const & XModule();
 protected:
     virtual void    Resize() override;
     virtual void    GetFocus() override;
diff --git a/basctl/source/dlged/dlged.cxx b/basctl/source/dlged/dlged.cxx
index 5cd875304e4d..157a2eb8ed0f 100644
--- a/basctl/source/dlged/dlged.cxx
+++ b/basctl/source/dlged/dlged.cxx
@@ -251,7 +251,7 @@ DlgEditor::~DlgEditor()
 }
 
 
-Reference< awt::XControlContainer > DlgEditor::GetWindowControlContainer()
+Reference< awt::XControlContainer > const & DlgEditor::GetWindowControlContainer()
 {
     if (!m_xControlContainer.is())
         m_xControlContainer = VCLUnoHelper::CreateControlContainer(&rWindow);
diff --git a/basctl/source/inc/dlged.hxx b/basctl/source/inc/dlged.hxx
index 5963f0710f11..1fba5834641d 100644
--- a/basctl/source/inc/dlged.hxx
+++ b/basctl/source/inc/dlged.hxx
@@ -147,7 +147,7 @@ public:
         @see GetWindow
         @see SetWindow
     */
-    css::uno::Reference< css::awt::XControlContainer >
+    css::uno::Reference< css::awt::XControlContainer > const &
                     GetWindowControlContainer();
 
     void            SetScrollBars( ScrollBar* pHScroll, ScrollBar* pVScroll );
diff --git a/basegfx/source/tools/b2dclipstate.cxx b/basegfx/source/tools/b2dclipstate.cxx
index 251a0e130116..d4bc4fa867ed 100644
--- a/basegfx/source/tools/b2dclipstate.cxx
+++ b/basegfx/source/tools/b2dclipstate.cxx
@@ -173,7 +173,7 @@ namespace tools
             addPolyPolygon(rPolyPoly,XOR);
         }
 
-        B2DPolyPolygon getClipPoly() const
+        B2DPolyPolygon const & getClipPoly() const
         {
             commitPendingRanges();
             commitPendingPolygons();
diff --git a/basic/source/classes/errobject.cxx b/basic/source/classes/errobject.cxx
index 7bf209563d91..45421d50600c 100644
--- a/basic/source/classes/errobject.cxx
+++ b/basic/source/classes/errobject.cxx
@@ -189,7 +189,7 @@ SbxErrObject::~SbxErrObject()
     OSL_TRACE("SbxErrObject::~SbxErrObject dtor");
 }
 
-uno::Reference< vba::XErrObject >
+uno::Reference< vba::XErrObject > const &
 SbxErrObject::getUnoErrObject()
 {
     SbxVariable* pVar = getErrObject();
@@ -197,7 +197,7 @@ SbxErrObject::getUnoErrObject()
     return pGlobErr->m_xErr;
 }
 
-SbxVariableRef
+SbxVariableRef const &
 SbxErrObject::getErrObject()
 {
     static SbxVariableRef pGlobErr = new SbxErrObject( OUString("Err"), uno::makeAny( uno::Reference< vba::XErrObject >( new ErrObject() ) ) );
diff --git a/basic/source/classes/sb.cxx b/basic/source/classes/sb.cxx
index 6d2aaa6c84d5..a4de8a1ceb72 100644
--- a/basic/source/classes/sb.cxx
+++ b/basic/source/classes/sb.cxx
@@ -1815,7 +1815,7 @@ void StarBASIC::SetGlobalBreakHdl( const Link<StarBASIC*,sal_uInt16>& rLink )
     GetSbData()->aBreakHdl = rLink;
 }
 
-SbxArrayRef StarBASIC::getUnoListeners()
+SbxArrayRef const & StarBASIC::getUnoListeners()
 {
     if( !xUnoListeners.Is() )
     {
diff --git a/basic/source/classes/sbunoobj.cxx b/basic/source/classes/sbunoobj.cxx
index 21be5c9dee43..10e96e6de2e6 100644
--- a/basic/source/classes/sbunoobj.cxx
+++ b/basic/source/classes/sbunoobj.cxx
@@ -167,7 +167,7 @@ Reference< XIdlReflection > getCoreReflection_Impl()
 }
 
 // save CoreReflection statically
-Reference< XHierarchicalNameAccess > getCoreReflection_HierarchicalNameAccess_Impl()
+Reference< XHierarchicalNameAccess > const & getCoreReflection_HierarchicalNameAccess_Impl()
 {
     static Reference< XHierarchicalNameAccess > xCoreReflection_HierarchicalNameAccess;
 
@@ -184,7 +184,7 @@ Reference< XHierarchicalNameAccess > getCoreReflection_HierarchicalNameAccess_Im
 }
 
 // Hold TypeProvider statically
-Reference< XHierarchicalNameAccess > getTypeProvider_Impl()
+Reference< XHierarchicalNameAccess > const & getTypeProvider_Impl()
 {
     static Reference< XHierarchicalNameAccess > xAccess;
 
@@ -210,7 +210,7 @@ Reference< XHierarchicalNameAccess > getTypeProvider_Impl()
 }
 
 // Hold TypeConverter statically
-Reference< XTypeConverter > getTypeConverter_Impl()
+Reference< XTypeConverter > const & getTypeConverter_Impl()
 {
     static Reference< XTypeConverter > xTypeConverter;
 
diff --git a/basic/source/classes/sbxmod.cxx b/basic/source/classes/sbxmod.cxx
index 1e59c1373474..76ab1aa44761 100644
--- a/basic/source/classes/sbxmod.cxx
+++ b/basic/source/classes/sbxmod.cxx
@@ -492,7 +492,7 @@ SbModule::~SbModule()
     mxWrapper = nullptr;
 }
 
-uno::Reference< script::XInvocation >
+uno::Reference< script::XInvocation > const &
 SbModule::GetUnoModule()
 {
     if ( !mxWrapper.is() )
diff --git a/basic/source/inc/errobject.hxx b/basic/source/inc/errobject.hxx
index 88cef685e8d2..796b83102269 100644
--- a/basic/source/inc/errobject.hxx
+++ b/basic/source/inc/errobject.hxx
@@ -32,8 +32,8 @@ class SbxErrObject : public SbUnoObject
     virtual ~SbxErrObject();
 
 public:
-    static SbxVariableRef getErrObject();
-    static css::uno::Reference< ooo::vba::XErrObject > getUnoErrObject();
+    static SbxVariableRef const & getErrObject();
+    static css::uno::Reference< ooo::vba::XErrObject > const & getUnoErrObject();
 
     void setNumberAndDescription( ::sal_Int32 _number, const OUString& _description )
         throw (css::uno::RuntimeException);
diff --git a/basic/source/runtime/methods.cxx b/basic/source/runtime/methods.cxx
index 2abca341ca68..420298ab2940 100644
--- a/basic/source/runtime/methods.cxx
+++ b/basic/source/runtime/methods.cxx
@@ -160,7 +160,7 @@ OUString getFullPath( const OUString& aRelPath )
 }
 
 // TODO: -> SbiGlobals
-static uno::Reference< ucb::XSimpleFileAccess3 > getFileAccess()
+static uno::Reference< ucb::XSimpleFileAccess3 > const & getFileAccess()
 {
     static uno::Reference< ucb::XSimpleFileAccess3 > xSFI;
     if( !xSFI.is() )
diff --git a/basic/source/runtime/methods1.cxx b/basic/source/runtime/methods1.cxx
index 6bddfd5c8570..93183d289e17 100644
--- a/basic/source/runtime/methods1.cxx
+++ b/basic/source/runtime/methods1.cxx
@@ -67,7 +67,7 @@ using namespace com::sun::star::lang;
 using namespace com::sun::star::sheet;
 using namespace com::sun::star::uno;
 
-static Reference< XCalendar4 > getLocaleCalendar()
+static Reference< XCalendar4 > const & getLocaleCalendar()
 {
     static Reference< XCalendar4 > xCalendar;
     if( !xCalendar.is() )
diff --git a/canvas/source/cairo/cairo_spritecanvashelper.cxx b/canvas/source/cairo/cairo_spritecanvashelper.cxx
index 03fa5597e319..8ffa34e4da9c 100644
--- a/canvas/source/cairo/cairo_spritecanvashelper.cxx
+++ b/canvas/source/cairo/cairo_spritecanvashelper.cxx
@@ -481,7 +481,7 @@ namespace cairocanvas
         cairo_paint( pWindowCairo.get() );
     }
 
-    ::cairo::SurfaceSharedPtr SpriteCanvasHelper::getCompositingSurface( const ::basegfx::B2ISize& rNeededSize )
+    ::cairo::SurfaceSharedPtr const & SpriteCanvasHelper::getCompositingSurface( const ::basegfx::B2ISize& rNeededSize )
     {
         if( rNeededSize.getX() > maCompositingSurfaceSize.getX() ||
             rNeededSize.getY() > maCompositingSurfaceSize.getY() )
@@ -501,7 +501,7 @@ namespace cairocanvas
         return mpCompositingSurface;
     }
 
-    ::cairo::SurfaceSharedPtr SpriteCanvasHelper::getTemporarySurface()
+    ::cairo::SurfaceSharedPtr const & SpriteCanvasHelper::getTemporarySurface()
     {
         if ( !mpTemporarySurface )
             mpTemporarySurface = createSurface( maCompositingSurfaceSize );
diff --git a/canvas/source/cairo/cairo_spritecanvashelper.hxx b/canvas/source/cairo/cairo_spritecanvashelper.hxx
index 2fc3222eaadd..35cf73629653 100644
--- a/canvas/source/cairo/cairo_spritecanvashelper.hxx
+++ b/canvas/source/cairo/cairo_spritecanvashelper.hxx
@@ -117,8 +117,8 @@ namespace cairocanvas
                             const ::std::vector< ::canvas::Sprite::Reference >& rSortedUpdateSprites );
 
     private:
-        ::cairo::SurfaceSharedPtr getCompositingSurface( const ::basegfx::B2ISize& rNeededSize );
-        ::cairo::SurfaceSharedPtr getTemporarySurface();
+        ::cairo::SurfaceSharedPtr const & getCompositingSurface( const ::basegfx::B2ISize& rNeededSize );
+        ::cairo::SurfaceSharedPtr const & getTemporarySurface();
         ::cairo::SurfaceSharedPtr createSurface( const ::basegfx::B2ISize& rNeededSize ) const;
 
         /// Set from the SpriteCanvas: instance coordinating sprite redraw
diff --git a/chart2/inc/ChartModel.hxx b/chart2/inc/ChartModel.hxx
index b3caaad412c4..92c6c05d5c5f 100644
--- a/chart2/inc/ChartModel.hxx
+++ b/chart2/inc/ChartModel.hxx
@@ -568,7 +568,7 @@ public:
         throw (css::uno::RuntimeException, std::exception) override;
 
     // normal methods
-    css::uno::Reference< css::util::XNumberFormatsSupplier >
+    css::uno::Reference< css::util::XNumberFormatsSupplier > const &
         getNumberFormatsSupplier();
 
     const css::uno::Reference< css::uno::XInterface >& getChartView() { return xChartView;}
diff --git a/chart2/qa/extras/chart2export.cxx b/chart2/qa/extras/chart2export.cxx
index 846daa78b34d..6f8004dbfbc4 100644
--- a/chart2/qa/extras/chart2export.cxx
+++ b/chart2/qa/extras/chart2export.cxx
@@ -200,7 +200,7 @@ public:
     }
 };
 
-OUString findChartFile(const OUString& rDir, uno::Reference< container::XNameAccess > const & xNames )
+OUString const & findChartFile(const OUString& rDir, uno::Reference< container::XNameAccess > const & xNames )
 {
     uno::Sequence<OUString> rNames = xNames->getElementNames();
     OUString* pElement = std::find_if(rNames.begin(), rNames.end(), CheckForChartName(rDir));
diff --git a/chart2/source/controller/chartapiwrapper/Chart2ModelContact.cxx b/chart2/source/controller/chartapiwrapper/Chart2ModelContact.cxx
index 68c57a5aa11e..904ec57ce11c 100644
--- a/chart2/source/controller/chartapiwrapper/Chart2ModelContact.cxx
+++ b/chart2/source/controller/chartapiwrapper/Chart2ModelContact.cxx
@@ -98,7 +98,7 @@ Reference< chart2::XDiagram > Chart2ModelContact::getChart2Diagram() const
     return ChartModelHelper::findDiagram( this->getChartModel() );
 }
 
-uno::Reference< lang::XUnoTunnel > Chart2ModelContact::getChartView() const
+uno::Reference< lang::XUnoTunnel > const & Chart2ModelContact::getChartView() const
 {
     if(!m_xChartView.is())
     {
diff --git a/chart2/source/controller/chartapiwrapper/Chart2ModelContact.hxx b/chart2/source/controller/chartapiwrapper/Chart2ModelContact.hxx
index 8b64b5f0fb96..a0e9305676b2 100644
--- a/chart2/source/controller/chartapiwrapper/Chart2ModelContact.hxx
+++ b/chart2/source/controller/chartapiwrapper/Chart2ModelContact.hxx
@@ -126,7 +126,7 @@ public:
 
 private: //methods
     ExplicitValueProvider* getExplicitValueProvider() const;
-    css::uno::Reference< css::lang::XUnoTunnel > getChartView() const;
+    css::uno::Reference< css::lang::XUnoTunnel > const & getChartView() const;
 
 public: //member
     css::uno::Reference< css::uno::XComponentContext >  m_xContext;
diff --git a/chart2/source/controller/dialogs/DialogModel.cxx b/chart2/source/controller/dialogs/DialogModel.cxx
index 2503d858315a..08f391de5035 100644
--- a/chart2/source/controller/dialogs/DialogModel.cxx
+++ b/chart2/source/controller/dialogs/DialogModel.cxx
@@ -396,7 +396,7 @@ void DialogModel::setTemplate(
     m_xTemplate = xTemplate;
 }
 
-::std::shared_ptr< RangeSelectionHelper >
+::std::shared_ptr< RangeSelectionHelper > const &
     DialogModel::getRangeSelectionHelper() const
 {
     if( ! m_spRangeSelectionHelper.get())
diff --git a/chart2/source/controller/dialogs/DialogModel.hxx b/chart2/source/controller/dialogs/DialogModel.hxx
index a863b614779d..73fe00a44efb 100644
--- a/chart2/source/controller/dialogs/DialogModel.hxx
+++ b/chart2/source/controller/dialogs/DialogModel.hxx
@@ -76,7 +76,7 @@ public:
     void setTemplate(
         const css::uno::Reference< css::chart2::XChartTypeTemplate > & xTemplate );
 
-    std::shared_ptr< RangeSelectionHelper >
+    std::shared_ptr< RangeSelectionHelper > const &
         getRangeSelectionHelper() const;
 
     css::uno::Reference< css::frame::XModel >
diff --git a/chart2/source/controller/dialogs/RangeSelectionHelper.cxx b/chart2/source/controller/dialogs/RangeSelectionHelper.cxx
index c092b32772d6..013c625fa028 100644
--- a/chart2/source/controller/dialogs/RangeSelectionHelper.cxx
+++ b/chart2/source/controller/dialogs/RangeSelectionHelper.cxx
@@ -54,7 +54,7 @@ bool RangeSelectionHelper::hasRangeSelection()
     return getRangeSelection().is();
 }
 
-Reference< sheet::XRangeSelection > RangeSelectionHelper::getRangeSelection()
+Reference< sheet::XRangeSelection > const & RangeSelectionHelper::getRangeSelection()
 {
     if( !m_xRangeSelection.is() &&
         m_xChartDocument.is() )
diff --git a/chart2/source/controller/inc/RangeSelectionHelper.hxx b/chart2/source/controller/inc/RangeSelectionHelper.hxx
index 049c19eac9d3..0b2ab7153e52 100644
--- a/chart2/source/controller/inc/RangeSelectionHelper.hxx
+++ b/chart2/source/controller/inc/RangeSelectionHelper.hxx
@@ -43,7 +43,7 @@ public:
     ~RangeSelectionHelper();
 
     bool hasRangeSelection();
-    css::uno::Reference< css::sheet::XRangeSelection > getRangeSelection();
+    css::uno::Reference< css::sheet::XRangeSelection > const & getRangeSelection();
     void raiseRangeSelectionDocument();
     bool chooseRange(
         const OUString & aCurrentRange,
diff --git a/chart2/source/inc/ExplicitCategoriesProvider.hxx b/chart2/source/inc/ExplicitCategoriesProvider.hxx
index 60de98f6a00a..54763be4e8a2 100644
--- a/chart2/source/inc/ExplicitCategoriesProvider.hxx
+++ b/chart2/source/inc/ExplicitCategoriesProvider.hxx
@@ -59,7 +59,7 @@ public:
 
     css::uno::Reference< css::chart2::data::XDataSequence > getOriginalCategories();
 
-    css::uno::Sequence< OUString > getSimpleCategories();
+    css::uno::Sequence< OUString > const & getSimpleCategories();
     const std::vector<ComplexCategory>* getCategoriesByLevel( sal_Int32 nLevel );
 
     static OUString getCategoryByIndex(
diff --git a/chart2/source/inc/chartview/DrawModelWrapper.hxx b/chart2/source/inc/chartview/DrawModelWrapper.hxx
index 20cbcae441c3..91ac42c19734 100644
--- a/chart2/source/inc/chartview/DrawModelWrapper.hxx
+++ b/chart2/source/inc/chartview/DrawModelWrapper.hxx
@@ -51,11 +51,11 @@ public:
     css::uno::Reference< css::lang::XMultiServiceFactory > getShapeFactory();
 
     // the main page will contain the normal view objects
-    css::uno::Reference< css::drawing::XDrawPage > getMainDrawPage();
+    css::uno::Reference< css::drawing::XDrawPage > const & getMainDrawPage();
     SAL_DLLPRIVATE void clearMainDrawPage();
 
     // the extra page is not visible, but contains some extras like the symbols for data points
-    css::uno::Reference< css::drawing::XDrawPage > getHiddenDrawPage();
+    css::uno::Reference< css::drawing::XDrawPage > const & getHiddenDrawPage();
 
     static css::uno::Reference< css::drawing::XShapes >
          getChartRootShape( const css::uno::Reference< css::drawing::XDrawPage>& xPage );
diff --git a/chart2/source/model/main/ChartModel.cxx b/chart2/source/model/main/ChartModel.cxx
index 48ec54304805..b9647eb16b67 100644
--- a/chart2/source/model/main/ChartModel.cxx
+++ b/chart2/source/model/main/ChartModel.cxx
@@ -1301,7 +1301,7 @@ Sequence< OUString > SAL_CALL ChartModel::getAvailableServiceNames()
     return aResult;
 }
 
-Reference< util::XNumberFormatsSupplier > ChartModel::getNumberFormatsSupplier()
+Reference< util::XNumberFormatsSupplier > const & ChartModel::getNumberFormatsSupplier()
 {
     if( !m_xNumberFormatsSupplier.is() )
     {
diff --git a/chart2/source/tools/ExplicitCategoriesProvider.cxx b/chart2/source/tools/ExplicitCategoriesProvider.cxx
index fc45f1f6d387..d2f24524873b 100644
--- a/chart2/source/tools/ExplicitCategoriesProvider.cxx
+++ b/chart2/source/tools/ExplicitCategoriesProvider.cxx
@@ -504,7 +504,7 @@ void ExplicitCategoriesProvider::init()
     }
 }
 
-Sequence< OUString > ExplicitCategoriesProvider::getSimpleCategories()
+Sequence< OUString > const & ExplicitCategoriesProvider::getSimpleCategories()
 {
     if( !m_bIsExplicitCategoriesInited )
     {
diff --git a/chart2/source/view/inc/VDataSeries.hxx b/chart2/source/view/inc/VDataSeries.hxx
index 7231f0515338..f547cb4013ce 100644
--- a/chart2/source/view/inc/VDataSeries.hxx
+++ b/chart2/source/view/inc/VDataSeries.hxx
@@ -94,8 +94,8 @@ public:
 
     bool        hasPropertyMapping( const OUString& rPropName ) const;
 
-    css::uno::Sequence< double > getAllX() const;
-    css::uno::Sequence< double > getAllY() const;
+    css::uno::Sequence< double > const & getAllX() const;
+    css::uno::Sequence< double > const & getAllY() const;
 
     double getXMeanValue() const;
     double getYMeanValue() const;
diff --git a/chart2/source/view/main/DrawModelWrapper.cxx b/chart2/source/view/main/DrawModelWrapper.cxx
index f787a4906084..d62886091cce 100644
--- a/chart2/source/view/main/DrawModelWrapper.cxx
+++ b/chart2/source/view/main/DrawModelWrapper.cxx
@@ -163,7 +163,7 @@ uno::Reference< lang::XMultiServiceFactory > DrawModelWrapper::getShapeFactory()
     return xShapeFactory;
 }
 
-uno::Reference< drawing::XDrawPage > DrawModelWrapper::getMainDrawPage()
+uno::Reference< drawing::XDrawPage > const & DrawModelWrapper::getMainDrawPage()
 {
     if (m_xMainDrawPage.is())
         return m_xMainDrawPage;
@@ -192,7 +192,7 @@ uno::Reference< drawing::XDrawPage > DrawModelWrapper::getMainDrawPage()
     // AbstractShapeFactory::getOrCreateShapeFactory(this->getShapeFactory())->getOrCreateChartRootShape( m_xMainDrawPage );
     return m_xMainDrawPage;
 }
-uno::Reference< drawing::XDrawPage > DrawModelWrapper::getHiddenDrawPage()
+uno::Reference< drawing::XDrawPage > const & DrawModelWrapper::getHiddenDrawPage()
 {
     if( !m_xHiddenDrawPage.is() )
     {
diff --git a/chart2/source/view/main/DummyXShape.cxx b/chart2/source/view/main/DummyXShape.cxx
index 544b272ea267..579765ab18da 100644
--- a/chart2/source/view/main/DummyXShape.cxx
+++ b/chart2/source/view/main/DummyXShape.cxx
@@ -304,7 +304,7 @@ OUString SAL_CALL DummyXShape::getImplementationName()
 
 namespace {
 
-uno::Sequence< OUString > listSupportedServices()
+uno::Sequence< OUString > const & listSupportedServices()
 {
     static const uno::Sequence< OUString > aSupportedServices{
         "com.sun.star.drawing.Shape",
diff --git a/chart2/source/view/main/VDataSeries.cxx b/chart2/source/view/main/VDataSeries.cxx
index 6b98b7a6f1ab..81e7bd2a2ce1 100644
--- a/chart2/source/view/main/VDataSeries.cxx
+++ b/chart2/source/view/main/VDataSeries.cxx
@@ -725,7 +725,7 @@ double VDataSeries::getMaximumofAllDifferentYValues( sal_Int32 index ) const
     return fMax;
 }
 
-uno::Sequence< double > VDataSeries::getAllX() const
+uno::Sequence< double > const & VDataSeries::getAllX() const
 {
     if(!m_aValues_X.is() && !m_aValues_X.getLength() && m_nPointCount)
     {
@@ -738,7 +738,7 @@ uno::Sequence< double > VDataSeries::getAllX() const
     return m_aValues_X.Doubles;
 }
 
-uno::Sequence< double > VDataSeries::getAllY() const
+uno::Sequence< double > const & VDataSeries::getAllY() const
 {
     if(!m_aValues_Y.is() && !m_aValues_Y.getLength() && m_nPointCount)
     {
diff --git a/codemaker/source/codemaker/options.cxx b/codemaker/source/codemaker/options.cxx
index f4f318576b5a..83d0b2fd5633 100644
--- a/codemaker/source/codemaker/options.cxx
+++ b/codemaker/source/codemaker/options.cxx
@@ -37,7 +37,7 @@ bool Options::isValid(const OString& option) const
     return m_options.find(option) != m_options.end();
 }
 
-const OString Options::getOption(const OString& option) const
+const OString& Options::getOption(const OString& option) const
     throw( IllegalArgument )
 {
     OptionMap::const_iterator i(m_options.find(option));
diff --git a/comphelper/source/container/container.cxx b/comphelper/source/container/container.cxx
index 44f117b4562b..a383a534c102 100644
--- a/comphelper/source/container/container.cxx
+++ b/comphelper/source/container/container.cxx
@@ -39,7 +39,7 @@ IndexAccessIterator::IndexAccessIterator(css::uno::Reference< css::uno::XInterfa
 IndexAccessIterator::~IndexAccessIterator() {}
 
 
-css::uno::Reference< css::uno::XInterface> IndexAccessIterator::Next()
+css::uno::Reference< css::uno::XInterface> const & IndexAccessIterator::Next()
 {
     bool bCheckingStartingPoint = !m_xCurrentObject.is();
         // Is the current node the starting point?
diff --git a/comphelper/source/misc/accessibletexthelper.cxx b/comphelper/source/misc/accessibletexthelper.cxx
index 3cec05e24a1f..29ca9c6f8e38 100644
--- a/comphelper/source/misc/accessibletexthelper.cxx
+++ b/comphelper/source/misc/accessibletexthelper.cxx
@@ -54,7 +54,7 @@ namespace comphelper
     }
 
 
-    Reference < i18n::XBreakIterator > OCommonAccessibleText::implGetBreakIterator()
+    Reference < i18n::XBreakIterator > const & OCommonAccessibleText::implGetBreakIterator()
     {
         if ( !m_xBreakIter.is() )
         {
@@ -66,7 +66,7 @@ namespace comphelper
     }
 
 
-    Reference < i18n::XCharacterClassification > OCommonAccessibleText::implGetCharacterClassification()
+    Reference < i18n::XCharacterClassification > const & OCommonAccessibleText::implGetCharacterClassification()
     {
         if ( !m_xCharClass.is() )
         {
diff --git a/comphelper/source/property/propertysetinfo.cxx b/comphelper/source/property/propertysetinfo.cxx
index ca73b511eabc..9c1e8097f04e 100644
--- a/comphelper/source/property/propertysetinfo.cxx
+++ b/comphelper/source/property/propertysetinfo.cxx
@@ -40,7 +40,7 @@ public:
     void add(PropertyMapEntry const * pMap) throw();
     void remove( const OUString& aName ) throw();
 
-    std::vector< Property > getProperties() throw();
+    std::vector< Property > const & getProperties() throw();
 
     const PropertyMap& getPropertyMap() const throw() { return maPropertyMap;}
 
@@ -83,7 +83,7 @@ void PropertyMapImpl::remove( const OUString& aName ) throw()
     maProperties.clear();
 }
 
-std::vector< Property > PropertyMapImpl::getProperties() throw()
+std::vector< Property > const & PropertyMapImpl::getProperties() throw()
 {
     // maybe we have to generate the properties after
     // a change in the property map or at first call
diff --git a/comphelper/source/xml/ofopxmlhelper.cxx b/comphelper/source/xml/ofopxmlhelper.cxx
index c7bfcf8afea7..b50c30ec9daa 100644
--- a/comphelper/source/xml/ofopxmlhelper.cxx
+++ b/comphelper/source/xml/ofopxmlhelper.cxx
@@ -67,7 +67,7 @@ class OFOPXMLHelper_Impl
 
 
 public:
-    css::uno::Sequence< css::uno::Sequence< css::beans::StringPair > > GetParsingResult();
+    css::uno::Sequence< css::uno::Sequence< css::beans::StringPair > > const & GetParsingResult();
 
     explicit OFOPXMLHelper_Impl( sal_uInt16 nFormat ); // must not be created directly
     virtual ~OFOPXMLHelper_Impl();
@@ -284,7 +284,7 @@ OFOPXMLHelper_Impl::~OFOPXMLHelper_Impl()
 }
 
 
-uno::Sequence< uno::Sequence< beans::StringPair > > OFOPXMLHelper_Impl::GetParsingResult()
+uno::Sequence< uno::Sequence< beans::StringPair > > const & OFOPXMLHelper_Impl::GetParsingResult()
 {
     if ( m_aElementsSeq.size() )
         throw uno::RuntimeException(); // the parsing has still not finished!
diff --git a/compilerplugins/clang/passstuffbyref.cxx b/compilerplugins/clang/passstuffbyref.cxx
index 3cf7a352e89f..b1b3169f94c9 100644
--- a/compilerplugins/clang/passstuffbyref.cxx
+++ b/compilerplugins/clang/passstuffbyref.cxx
@@ -36,7 +36,7 @@ public:
     virtual void run() override { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
 
     // When warning about function params of primitive type that could be passed
-    // by value instead of by reference, make sure not to warn if the paremeter
+    // by value instead of by reference, make sure not to warn if the parameter
     // is ever bound to a reference; on the one hand, this needs scaffolding in
     // all Traverse*Decl functions (indirectly) derived from FunctionDecl; and
     // on the other hand, use a hack of ignoring just the DeclRefExprs nested in
@@ -51,9 +51,8 @@ public:
     bool TraverseImplicitCastExpr(ImplicitCastExpr * expr);
     bool VisitDeclRefExpr(const DeclRefExpr * expr);
 
-    bool VisitCallExpr(const CallExpr * ) { if (mbInsideFunctionDecl) mbFoundDisqualifier = true; return true; }
-    bool VisitMaterializeTemporaryExpr(const MaterializeTemporaryExpr * ) { if (mbInsideFunctionDecl) mbFoundDisqualifier = true; return true; }
-    bool VisitDeclStmt(const DeclStmt * ) { if (mbInsideFunctionDecl) mbFoundDisqualifier = true; return true; }
+    bool VisitReturnStmt(const ReturnStmt * );
+    bool VisitVarDecl(const VarDecl * );
 
 private:
     template<typename T> bool traverseAnyFunctionDecl(
@@ -62,6 +61,8 @@ private:
     void checkReturnValue(const FunctionDecl * functionDecl, const CXXMethodDecl * methodDecl);
     bool isFat(QualType type);
     bool isPrimitiveConstRef(QualType type);
+    bool isReturnExprDisqualified(const Expr* expr);
+
     bool mbInsideFunctionDecl;
     bool mbFoundDisqualifier;
 
@@ -228,10 +229,10 @@ void PassStuffByRef::checkParams(const FunctionDecl * functionDecl) {
 
 void PassStuffByRef::checkReturnValue(const FunctionDecl * functionDecl, const CXXMethodDecl * methodDecl) {
 
-    if (methodDecl && methodDecl->isVirtual()) {
+    if (methodDecl && (methodDecl->isVirtual() || methodDecl->hasAttr<OverrideAttr>())) {
         return;
     }
-    if( !functionDecl->hasBody()) {
+    if( !functionDecl->doesThisDeclarationHaveABody()) {
         return;
     }
 
@@ -258,7 +259,8 @@ void PassStuffByRef::checkReturnValue(const FunctionDecl * functionDecl, const C
         || (dc.MemberFunction().Class("Model").Namespace("xforms")
             .GlobalNamespace())
         || (dc.MemberFunction().Class("Submission").Namespace("xforms")
-            .GlobalNamespace()))
+            .GlobalNamespace())
+        || (dc.Function("TopLeft").Class("SwRect").GlobalNamespace()))
     {
         return;
     }
@@ -274,8 +276,7 @@ void PassStuffByRef::checkReturnValue(const FunctionDecl * functionDecl, const C
         return;
     // depends on a define
     if (dc.Function("GetSharedFileURL").Class("SfxObjectShell")
-        .GlobalNamespace())
-    {
+        .GlobalNamespace()) {
         return;
     }
     mbInsideFunctionDecl = true;
@@ -297,12 +298,85 @@ void PassStuffByRef::checkReturnValue(const FunctionDecl * functionDecl, const C
     {
         report(
                 DiagnosticsEngine::Note,
-                "rather return by const& than by value",
+                "decl here",
                 functionDecl->getCanonicalDecl()->getSourceRange().getBegin())
             << functionDecl->getCanonicalDecl()->getSourceRange();
     }
 }
 
+bool PassStuffByRef::VisitReturnStmt(const ReturnStmt * returnStmt)
+{
+    if (!mbInsideFunctionDecl)
+        return true;
+    const Expr* expr = dyn_cast<Expr>(*returnStmt->child_begin())->IgnoreParenCasts();
+
+    if (isReturnExprDisqualified(expr)) {
+        mbFoundDisqualifier = true;
+        return true;
+    }
+    return true;
+}
+
+bool PassStuffByRef::isReturnExprDisqualified(const Expr* expr)
+{
+    if (isa<ExprWithCleanups>(expr)) {
+        return true;
+    }
+    if (const CXXConstructExpr* constructExpr = dyn_cast<CXXConstructExpr>(expr)) {
+        if (constructExpr->getNumArgs()==1) {
+            expr = constructExpr->getArg(0)->IgnoreParenCasts();
+        }
+    }
+    if (isa<CXXConstructExpr>(expr)) {
+        return true;
+    }
+    if (const ArraySubscriptExpr* childExpr = dyn_cast<ArraySubscriptExpr>(expr)) {
+        expr = childExpr->getLHS();
+    }
+    if (const MemberExpr* memberExpr = dyn_cast<MemberExpr>(expr)) {
+        expr = memberExpr->getBase();
+    }
+    if (const DeclRefExpr* declRef = dyn_cast<DeclRefExpr>(expr)) {
+        const VarDecl* varDecl = dyn_cast<VarDecl>(declRef->getDecl());
+        if (varDecl) {
+            if (varDecl->getStorageDuration() == SD_Automatic
+                || varDecl->getStorageDuration() == SD_FullExpression ) {
+                return true;
+            }
+            return false;
+        }
+    }
+    if (const ConditionalOperator* condOper = dyn_cast<ConditionalOperator>(expr)) {
+        return isReturnExprDisqualified(condOper->getTrueExpr())
+            || isReturnExprDisqualified(condOper->getFalseExpr());
+    }
+    if (const CallExpr* callExpr = dyn_cast<CallExpr>(expr)) {
+        return !loplugin::TypeCheck(callExpr->getType()).Const().LvalueReference();
+    }
+    return true;
+}
+
+bool PassStuffByRef::VisitVarDecl(const VarDecl * varDecl)
+{
+    if (!mbInsideFunctionDecl)
+        return true;
+    // things guarded by locking are probably best left alone
+    loplugin::TypeCheck dc(varDecl->getType());
+    if (dc.Class("Guard").Namespace("osl").GlobalNamespace())
+        mbFoundDisqualifier = true;
+    if (dc.Class("ClearableGuard").Namespace("osl").GlobalNamespace())
+        mbFoundDisqualifier = true;
+    if (dc.Class("ResettableGuard").Namespace("osl").GlobalNamespace())
+        mbFoundDisqualifier = true;
+    else if (dc.Class("SolarMutexGuard").GlobalNamespace())
+        mbFoundDisqualifier = true;
+    else if (dc.Class("SfxModelGuard").GlobalNamespace())
+        mbFoundDisqualifier = true;
+    else if (dc.Class("ReadWriteGuard").Namespace("utl").GlobalNamespace())
+        mbFoundDisqualifier = true;
+    return true;
+}
+
 // Would produce a wrong recommendation for
 //
 //   PresenterFrameworkObserver::RunOnUpdateEnd(
diff --git a/configmgr/source/lock.cxx b/configmgr/source/lock.cxx
index 66a2be9eeca6..9258b35bfeb7 100644
--- a/configmgr/source/lock.cxx
+++ b/configmgr/source/lock.cxx
@@ -25,7 +25,7 @@
 
 namespace configmgr {
 
-std::shared_ptr<osl::Mutex> lock()
+std::shared_ptr<osl::Mutex> const & lock()
 {
     static std::shared_ptr<osl::Mutex> theLock;
     if (!theLock.get())
diff --git a/configmgr/source/lock.hxx b/configmgr/source/lock.hxx
index d8c050e824e6..ee98efcc365f 100644
--- a/configmgr/source/lock.hxx
+++ b/configmgr/source/lock.hxx
@@ -26,7 +26,7 @@
 
 namespace configmgr {
 
-std::shared_ptr<osl::Mutex> lock();
+std::shared_ptr<osl::Mutex> const & lock();
 
 }
 
diff --git a/configmgr/source/propertynode.cxx b/configmgr/source/propertynode.cxx
index 97c32b21fe4f..041cd50f890d 100644
--- a/configmgr/source/propertynode.cxx
+++ b/configmgr/source/propertynode.cxx
@@ -48,7 +48,7 @@ rtl::Reference< Node > PropertyNode::clone(bool) const {
 }
 
 
-css::uno::Any PropertyNode::getValue(Components & components) {
+css::uno::Any const & PropertyNode::getValue(Components & components) {
     if (!externalDescriptor_.isEmpty()) {
         css::beans::Optional< css::uno::Any > val(
             components.getExternalValue(externalDescriptor_));
diff --git a/configmgr/source/propertynode.hxx b/configmgr/source/propertynode.hxx
index 7716ae963e34..e1ddb4495d08 100644
--- a/configmgr/source/propertynode.hxx
+++ b/configmgr/source/propertynode.hxx
@@ -45,7 +45,7 @@ public:
 
     bool isNillable() const { return nillable_;}
 
-    css::uno::Any getValue(Components & components);
+    css::uno::Any const & getValue(Components & components);
 
     void setValue(int layer, css::uno::Any const & value);
     css::uno::Any *getValuePtr(int layer);
diff --git a/configmgr/source/rootaccess.cxx b/configmgr/source/rootaccess.cxx
index a84898df0bbf..3d4bbd5b4345 100644
--- a/configmgr/source/rootaccess.cxx
+++ b/configmgr/source/rootaccess.cxx
@@ -101,7 +101,7 @@ void RootAccess::release() throw () {
     Access::release();
 }
 
-OUString RootAccess::getAbsolutePathRepresentation() {
+OUString const & RootAccess::getAbsolutePathRepresentation() {
     getNode(); // turn pathRepresentation_ into canonic form
     return pathRepresentation_;
 }
diff --git a/configmgr/source/rootaccess.hxx b/configmgr/source/rootaccess.hxx
index a308ef59b223..8ea6b2025e6d 100644
--- a/configmgr/source/rootaccess.hxx
+++ b/configmgr/source/rootaccess.hxx
@@ -70,7 +70,7 @@ public:
 
     virtual void SAL_CALL release() throw () override;
 
-    OUString getAbsolutePathRepresentation();
+    OUString const & getAbsolutePathRepresentation();
 
     const OUString& getLocale() const { return locale_;}
 
diff --git a/connectivity/source/commontools/FDatabaseMetaDataResultSet.cxx b/connectivity/source/commontools/FDatabaseMetaDataResultSet.cxx
index 3337bd12ad79..3e68e4a1c8e8 100644
--- a/connectivity/source/commontools/FDatabaseMetaDataResultSet.cxx
+++ b/connectivity/source/commontools/FDatabaseMetaDataResultSet.cxx
@@ -666,82 +666,82 @@ const ORowSetValue& ODatabaseMetaDataResultSet::getValue(sal_Int32 columnIndex)
 }
 
 /// return an empty ORowSetValueDecorator
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getEmptyValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getEmptyValue()
 {
     static ORowSetValueDecoratorRef aEmptyValueRef = new ORowSetValueDecorator();
     return aEmptyValueRef;
 }
 
 /// return an ORowSetValueDecorator with 0 as value
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::get0Value()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::get0Value()
 {
     static ORowSetValueDecoratorRef a0ValueRef = new ORowSetValueDecorator((sal_Int32)0);
     return a0ValueRef;
 }
 
 /// return an ORowSetValueDecorator with 1 as value
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::get1Value()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::get1Value()
 {
     static ORowSetValueDecoratorRef a1ValueRef = new ORowSetValueDecorator((sal_Int32)1);
     return a1ValueRef;
 }
 
 /// return an ORowSetValueDecorator with ColumnSearch::BASIC as value
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getBasicValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getBasicValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(ColumnSearch::BASIC);
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getSelectValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getSelectValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("SELECT"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getInsertValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getInsertValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("INSERT"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getDeleteValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getDeleteValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("DELETE"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getUpdateValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getUpdateValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("UPDATE"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getCreateValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getCreateValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("CREATE"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getReadValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getReadValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("READ"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getAlterValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getAlterValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("ALTER"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getDropValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getDropValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("DROP"));
     return aValueRef;
 }
 
-ORowSetValueDecoratorRef ODatabaseMetaDataResultSet::getQuoteValue()
+ORowSetValueDecoratorRef const & ODatabaseMetaDataResultSet::getQuoteValue()
 {
     static ORowSetValueDecoratorRef aValueRef = new ORowSetValueDecorator(OUString("'"));
     return aValueRef;
diff --git a/connectivity/source/commontools/dbconversion.cxx b/connectivity/source/commontools/dbconversion.cxx
index 1646b64ce255..63dc30858339 100644
--- a/connectivity/source/commontools/dbconversion.cxx
+++ b/connectivity/source/commontools/dbconversion.cxx
@@ -58,7 +58,7 @@ namespace dbtools
     using namespace ::com::sun::star::beans;
 
 
-    css::util::Date DBTypeConversion::getStandardDate()
+    css::util::Date const & DBTypeConversion::getStandardDate()
     {
         static css::util::Date STANDARD_DB_DATE(1,1,1900);
         return STANDARD_DB_DATE;
diff --git a/connectivity/source/cpool/ZPoolCollection.cxx b/connectivity/source/cpool/ZPoolCollection.cxx
index 9dd861d33854..ad462ea596b6 100644
--- a/connectivity/source/cpool/ZPoolCollection.cxx
+++ b/connectivity/source/cpool/ZPoolCollection.cxx
@@ -249,7 +249,7 @@ bool OPoolCollection::isPoolingEnabled()
     return bEnabled;
 }
 
-Reference<XInterface> OPoolCollection::getConfigPoolRoot()
+Reference<XInterface> const & OPoolCollection::getConfigPoolRoot()
 {
     if(!m_xConfigNode.is())
         m_xConfigNode = createWithServiceFactory(getConnectionPoolNodeName());
diff --git a/connectivity/source/cpool/ZPoolCollection.hxx b/connectivity/source/cpool/ZPoolCollection.hxx
index ff31c6c38435..25c3f5a934d1 100644
--- a/connectivity/source/cpool/ZPoolCollection.hxx
+++ b/connectivity/source/cpool/ZPoolCollection.hxx
@@ -86,7 +86,7 @@ namespace connectivity
 
         // some configuration helper methods
         css::uno::Reference< css::uno::XInterface > createWithServiceFactory(const OUString& _rPath) const;
-        css::uno::Reference< css::uno::XInterface > getConfigPoolRoot();
+        css::uno::Reference< css::uno::XInterface > const & getConfigPoolRoot();
         static css::uno::Reference< css::uno::XInterface > createWithProvider(   const css::uno::Reference< css::lang::XMultiServiceFactory >& _rxConfProvider,
                                                                                                     const OUString& _rPath);
         static css::uno::Reference< css::uno::XInterface > openNode( const OUString& _rPath,
diff --git a/connectivity/source/drivers/calc/CConnection.cxx b/connectivity/source/drivers/calc/CConnection.cxx
index f2cfdf2c41f7..0d32d31a7bb0 100644
--- a/connectivity/source/drivers/calc/CConnection.cxx
+++ b/connectivity/source/drivers/calc/CConnection.cxx
@@ -101,7 +101,7 @@ void OCalcConnection::construct(const OUString& url,const Sequence< PropertyValu
     acquireDoc();
 }
 
-Reference< XSpreadsheetDocument> OCalcConnection::acquireDoc()
+Reference< XSpreadsheetDocument> const & OCalcConnection::acquireDoc()
 {
     if ( m_xDoc.is() )
     {
diff --git a/connectivity/source/drivers/dbase/DIndex.cxx b/connectivity/source/drivers/dbase/DIndex.cxx
index f384a89b1da7..f5f4c4993906 100644
--- a/connectivity/source/drivers/dbase/DIndex.cxx
+++ b/connectivity/source/drivers/dbase/DIndex.cxx
@@ -130,7 +130,7 @@ sal_Int64 ODbaseIndex::getSomething( const Sequence< sal_Int8 > & rId ) throw (R
                 : ODbaseIndex_BASE::getSomething(rId);
 }
 
-ONDXPagePtr ODbaseIndex::getRoot()
+ONDXPagePtr const & ODbaseIndex::getRoot()
 {
     openIndexFile();
     if (!m_aRoot.Is())
diff --git a/connectivity/source/drivers/hsqldb/HDriver.cxx b/connectivity/source/drivers/hsqldb/HDriver.cxx
index 1a0ef32a0551..3da41939886d 100644
--- a/connectivity/source/drivers/hsqldb/HDriver.cxx
+++ b/connectivity/source/drivers/hsqldb/HDriver.cxx
@@ -124,7 +124,7 @@ namespace connectivity
         cppu::WeakComponentImplHelperBase::disposing();
     }
 
-    Reference< XDriver > ODriverDelegator::loadDriver( )
+    Reference< XDriver > const & ODriverDelegator::loadDriver( )
     {
         if ( !m_xDriver.is() )
         {
diff --git a/connectivity/source/drivers/hsqldb/HStorageMap.cxx b/connectivity/source/drivers/hsqldb/HStorageMap.cxx
index cad5fbde4beb..e79718a18f65 100644
--- a/connectivity/source/drivers/hsqldb/HStorageMap.cxx
+++ b/connectivity/source/drivers/hsqldb/HStorageMap.cxx
@@ -79,21 +79,21 @@ namespace connectivity
             }
         }
 
-        Reference< XInputStream> StreamHelper::getInputStream()
+        Reference< XInputStream> const & StreamHelper::getInputStream()
         {
             if ( !m_xInputStream.is() )
                 m_xInputStream = m_xStream->getInputStream();
             return m_xInputStream;
         }
 
-        Reference< XOutputStream> StreamHelper::getOutputStream()
+        Reference< XOutputStream> const & StreamHelper::getOutputStream()
         {
             if ( !m_xOutputStream.is() )
                 m_xOutputStream = m_xStream->getOutputStream();
             return m_xOutputStream;
         }
 
-        Reference< XSeekable> StreamHelper::getSeek()
+        Reference< XSeekable> const & StreamHelper::getSeek()
         {
             if ( !m_xSeek.is() )
                 m_xSeek.set(m_xStream,UNO_QUERY);
diff --git a/connectivity/source/drivers/jdbc/Object.cxx b/connectivity/source/drivers/jdbc/Object.cxx
index e7666cc39a31..068b1ed3991d 100644
--- a/connectivity/source/drivers/jdbc/Object.cxx
+++ b/connectivity/source/drivers/jdbc/Object.cxx
@@ -40,7 +40,7 @@ using namespace ::com::sun::star::container;
 using namespace ::com::sun::star::lang;
 
 
-::rtl::Reference< jvmaccess::VirtualMachine > getJavaVM2(const ::rtl::Reference< jvmaccess::VirtualMachine >& _rVM = ::rtl::Reference< jvmaccess::VirtualMachine >(),
+::rtl::Reference< jvmaccess::VirtualMachine > const & getJavaVM2(const ::rtl::Reference< jvmaccess::VirtualMachine >& _rVM = ::rtl::Reference< jvmaccess::VirtualMachine >(),
                                                         bool _bSet = false)
 {
     static ::rtl::Reference< jvmaccess::VirtualMachine > s_VM;
diff --git a/connectivity/source/drivers/mozab/bootstrap/MNSFolders.cxx b/connectivity/source/drivers/mozab/bootstrap/MNSFolders.cxx
index d3410ba6123d..c2c4c3906a49 100644
--- a/connectivity/source/drivers/mozab/bootstrap/MNSFolders.cxx
+++ b/connectivity/source/drivers/mozab/bootstrap/MNSFolders.cxx
@@ -90,7 +90,7 @@ namespace
     };
 
 
-    OUString lcl_guessProfileRoot( MozillaProductType _product )
+    OUString const & lcl_guessProfileRoot( MozillaProductType _product )
     {
         size_t productIndex = _product - 1;
 
diff --git a/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx b/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx
index 006266c78e5d..6d491ed34ee9 100644
--- a/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx
+++ b/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx
@@ -245,31 +245,31 @@ namespace connectivity
         // some methods to get already defined ORowSetValues
         // this increase the reuse of ORowSetValues
         /// return an empty ORowSetValueDecorator
-        static ORowSetValueDecoratorRef getEmptyValue();
+        static ORowSetValueDecoratorRef const & getEmptyValue();
         /// return an ORowSetValueDecorator with 0 as value
-        static ORowSetValueDecoratorRef get0Value();
+        static ORowSetValueDecoratorRef const & get0Value();
         /// return an ORowSetValueDecorator with 1 as value
-        static ORowSetValueDecoratorRef get1Value();
+        static ORowSetValueDecoratorRef const & get1Value();
         /// return an ORowSetValueDecorator with ColumnSearch::BASIC as value
-        static ORowSetValueDecoratorRef getBasicValue();
+        static ORowSetValueDecoratorRef const & getBasicValue();
         /// return an ORowSetValueDecorator with string SELECT as value
-        static ORowSetValueDecoratorRef getSelectValue();
+        static ORowSetValueDecoratorRef const & getSelectValue();
         /// return an ORowSetValueDecorator with string INSERT as value
-        static ORowSetValueDecoratorRef getInsertValue();
+        static ORowSetValueDecoratorRef const & getInsertValue();
         /// return an ORowSetValueDecorator with string DELETE as value
-        static ORowSetValueDecoratorRef getDeleteValue();
+        static ORowSetValueDecoratorRef const & getDeleteValue();
         /// return an ORowSetValueDecorator with string UPDATE as value
-        static ORowSetValueDecoratorRef getUpdateValue();
+        static ORowSetValueDecoratorRef const & getUpdateValue();
         /// return an ORowSetValueDecorator with string CREATE as value
-        static ORowSetValueDecoratorRef getCreateValue();
+        static ORowSetValueDecoratorRef const & getCreateValue();
         /// return an ORowSetValueDecorator with string READ as value
-        static ORowSetValueDecoratorRef getReadValue();
+        static ORowSetValueDecoratorRef const & getReadValue();
         /// return an ORowSetValueDecorator with string ALTER as value
-        static ORowSetValueDecoratorRef getAlterValue();
+        static ORowSetValueDecoratorRef const & getAlterValue();
         /// return an ORowSetValueDecorator with string DROP as value
-        static ORowSetValueDecoratorRef getDropValue();
+        static ORowSetValueDecoratorRef const & getDropValue();
         /// return an ORowSetValueDecorator with string ' as value
-        static ORowSetValueDecoratorRef getQuoteValue();
+        static ORowSetValueDecoratorRef const & getQuoteValue();
 
     };
 }
diff --git a/connectivity/source/inc/calc/CConnection.hxx b/connectivity/source/inc/calc/CConnection.hxx
index b8b734a13114..63b1d4ab084d 100644
--- a/connectivity/source/inc/calc/CConnection.hxx
+++ b/connectivity/source/inc/calc/CConnection.hxx
@@ -70,7 +70,7 @@ namespace connectivity
             virtual css::uno::Reference< css::sdbc::XPreparedStatement > SAL_CALL prepareCall( const OUString& sql ) throw(css::sdbc::SQLException, css::uno::RuntimeException, std::exception) override;
 
             // no interface methods
-            css::uno::Reference< css::sheet::XSpreadsheetDocument> acquireDoc();
+            css::uno::Reference< css::sheet::XSpreadsheetDocument> const & acquireDoc();
             void releaseDoc();
 
             class ODocHolder
diff --git a/connectivity/source/inc/dbase/DIndex.hxx b/connectivity/source/inc/dbase/DIndex.hxx
index 5396e6475d48..afe45a478708 100644
--- a/connectivity/source/inc/dbase/DIndex.hxx
+++ b/connectivity/source/inc/dbase/DIndex.hxx
@@ -125,7 +125,7 @@ namespace connectivity
 
             ONDXPage* CreatePage(sal_uInt32 nPagePos, ONDXPage* pParent = nullptr, bool bLoad = false);
             void Collect(ONDXPage*);
-            ONDXPagePtr getRoot();
+            ONDXPagePtr const & getRoot();
 
             bool isUnique() const { return m_IsUnique; }
             bool UseCollector() const {return m_bUseCollector;}
diff --git a/connectivity/source/inc/hsqldb/HDriver.hxx b/connectivity/source/inc/hsqldb/HDriver.hxx
index 21bc04459b93..255c6609b5d3 100644
--- a/connectivity/source/inc/hsqldb/HDriver.hxx
+++ b/connectivity/source/inc/hsqldb/HDriver.hxx
@@ -72,7 +72,7 @@ namespace connectivity
                 @return
                     The driver which was currently selected.
             */
-            css::uno::Reference< css::sdbc::XDriver > loadDriver( );
+            css::uno::Reference< css::sdbc::XDriver > const & loadDriver( );
 
             /** shut down the connection and revoke the storage from the map
                 @param  _aIter
diff --git a/connectivity/source/inc/hsqldb/HStorageMap.hxx b/connectivity/source/inc/hsqldb/HStorageMap.hxx
index f0bbe98e24d2..62ae7ec3d233 100644
--- a/connectivity/source/inc/hsqldb/HStorageMap.hxx
+++ b/connectivity/source/inc/hsqldb/HStorageMap.hxx
@@ -48,9 +48,9 @@ namespace connectivity
             StreamHelper(const css::uno::Reference< css::io::XStream>& _xStream);
             ~StreamHelper();
 
-            css::uno::Reference< css::io::XInputStream>   getInputStream();
-            css::uno::Reference< css::io::XOutputStream>  getOutputStream();
-            css::uno::Reference< css::io::XSeekable>      getSeek();
+            css::uno::Reference< css::io::XInputStream> const &   getInputStream();
+            css::uno::Reference< css::io::XOutputStream> const &  getOutputStream();
+            css::uno::Reference< css::io::XSeekable> const &      getSeek();
         };
 
 
diff --git a/dbaccess/source/core/api/RowSetCacheIterator.cxx b/dbaccess/source/core/api/RowSetCacheIterator.cxx
index bc1c9155eb52..9fbbc3209f41 100644
--- a/dbaccess/source/core/api/RowSetCacheIterator.cxx
+++ b/dbaccess/source/core/api/RowSetCacheIterator.cxx
@@ -22,6 +22,7 @@
 #include "RowSetBase.hxx"
 
 using namespace dbaccess;
+
 ORowSetCacheIterator::ORowSetCacheIterator(const ORowSetCacheIterator& _rRH)
 : m_aIter(_rRH.m_aIter)
 , m_pCache(_rRH.m_pCache)
@@ -29,7 +30,7 @@ ORowSetCacheIterator::ORowSetCacheIterator(const ORowSetCacheIterator& _rRH)
 {
 }
 
-ORowSetCacheIterator::operator ORowSetMatrix::iterator()
+ORowSetCacheIterator::operator ORowSetMatrix::iterator const &()
 {
     return m_aIter->second.aIterator;
 }
diff --git a/dbaccess/source/core/api/RowSetCacheIterator.hxx b/dbaccess/source/core/api/RowSetCacheIterator.hxx
index 4b4c97e35a39..6c4a63367961 100644
--- a/dbaccess/source/core/api/RowSetCacheIterator.hxx
+++ b/dbaccess/source/core/api/RowSetCacheIterator.hxx
@@ -58,7 +58,7 @@ namespace dbaccess
 
         bool isNull() const;
         ORowSetCacheIterator& operator =(const ORowSetMatrix::iterator&);
-        operator ORowSetMatrix::iterator();
+        operator ORowSetMatrix::iterator const &();
 
         ORowSetRow& operator *();
 
diff --git a/dbaccess/source/core/dataaccess/connection.cxx b/dbaccess/source/core/dataaccess/connection.cxx
index 9b170bdf0627..10c63345db44 100644
--- a/dbaccess/source/core/dataaccess/connection.cxx
+++ b/dbaccess/source/core/dataaccess/connection.cxx
@@ -669,7 +669,7 @@ Sequence< OUString > SAL_CALL OConnection::getAvailableServiceNames(  ) throw (R
     return aRet;
 }
 
-Reference< XTablesSupplier > OConnection::getMasterTables()
+Reference< XTablesSupplier > const & OConnection::getMasterTables()
 {
 // check if out "master connection" can supply tables
     if(!m_xMasterTables.is())
diff --git a/dbaccess/source/core/dataaccess/connection.hxx b/dbaccess/source/core/dataaccess/connection.hxx
index e06186cd91e5..eef6cfc2aa75 100644
--- a/dbaccess/source/core/dataaccess/connection.hxx
+++ b/dbaccess/source/core/dataaccess/connection.hxx
@@ -203,7 +203,7 @@ protected:
             throw css::lang::DisposedException();
     }
 
-    css::uno::Reference< css::sdbcx::XTablesSupplier > getMasterTables();
+    css::uno::Reference< css::sdbcx::XTablesSupplier > const & getMasterTables();
 
 private:
     /** checks whether or not there are naming conflicts between tables and queries
diff --git a/dbaccess/source/core/dataaccess/databasedocument.cxx b/dbaccess/source/core/dataaccess/databasedocument.cxx
index 9e0ee5eceb92..4d28b3756ea7 100644
--- a/dbaccess/source/core/dataaccess/databasedocument.cxx
+++ b/dbaccess/source/core/dataaccess/databasedocument.cxx
@@ -1729,7 +1729,7 @@ Reference< XUIConfigurationManager > SAL_CALL ODatabaseDocument::getUIConfigurat
     return Reference< XUIConfigurationManager >( getUIConfigurationManager2(), UNO_QUERY_THROW );
 }
 
-Reference< XUIConfigurationManager2 > ODatabaseDocument::getUIConfigurationManager2(  ) throw (RuntimeException)
+Reference< XUIConfigurationManager2 > const & ODatabaseDocument::getUIConfigurationManager2(  ) throw (RuntimeException)
 {
     DocumentGuard aGuard(*this, DocumentGuard::DefaultMethod);
 
@@ -2090,7 +2090,7 @@ Reference< XController2 > SAL_CALL ODatabaseDocument::createViewController( cons
     return xController;
 }
 
-Reference< XTitle > ODatabaseDocument::impl_getTitleHelper_throw()
+Reference< XTitle > const & ODatabaseDocument::impl_getTitleHelper_throw()
 {
     if ( ! m_xTitleHelper.is ())
     {
diff --git a/dbaccess/source/core/dataaccess/databasedocument.hxx b/dbaccess/source/core/dataaccess/databasedocument.hxx
index 0b91ad84119b..dbee460941aa 100644
--- a/dbaccess/source/core/dataaccess/databasedocument.hxx
+++ b/dbaccess/source/core/dataaccess/databasedocument.hxx
@@ -267,7 +267,7 @@ class ODatabaseDocument :public ModelDependentComponent             // ModelDepe
     // ModelDependentComponent overridables
     virtual css::uno::Reference< css::uno::XInterface > getThis() const override;
 
-    css::uno::Reference< css::frame::XTitle >             impl_getTitleHelper_throw();
+    css::uno::Reference< css::frame::XTitle > const &     impl_getTitleHelper_throw();
     css::uno::Reference< css::frame::XUntitledNumbers >   impl_getUntitledHelper_throw(
         const css::uno::Reference< css::uno::XInterface >& _xComponent = css::uno::Reference< css::uno::XInterface >());
 
@@ -466,7 +466,7 @@ public:
     }
 
 private:
-    css::uno::Reference< css::ui::XUIConfigurationManager2 > getUIConfigurationManager2() throw (css::uno::RuntimeException);
+    css::uno::Reference< css::ui::XUIConfigurationManager2 > const & getUIConfigurationManager2() throw (css::uno::RuntimeException);
 
     /** returns whether the model is currently being initialized
     */
diff --git a/dbaccess/source/filter/xml/xmlExport.cxx b/dbaccess/source/filter/xml/xmlExport.cxx
index a17220c2f55a..735586ad6f94 100644
--- a/dbaccess/source/filter/xml/xmlExport.cxx
+++ b/dbaccess/source/filter/xml/xmlExport.cxx
@@ -1360,7 +1360,7 @@ OUString ODBExport::implConvertAny(const Any& _rValue)
     return aBuffer.makeStringAndClear();
 }
 
-rtl::Reference < XMLPropertySetMapper > ODBExport::GetTableStylesPropertySetMapper() const
+rtl::Reference < XMLPropertySetMapper > const & ODBExport::GetTableStylesPropertySetMapper() const
 {
     if ( !m_xTableStylesPropertySetMapper.is() )
     {
@@ -1369,7 +1369,7 @@ rtl::Reference < XMLPropertySetMapper > ODBExport::GetTableStylesPropertySetMapp
     return m_xTableStylesPropertySetMapper;
 }
 
-rtl::Reference < XMLPropertySetMapper > ODBExport::GetCellStylesPropertySetMapper() const
+rtl::Reference < XMLPropertySetMapper > const & ODBExport::GetCellStylesPropertySetMapper() const
 {
     if ( !m_xCellStylesPropertySetMapper.is() )
     {
@@ -1378,7 +1378,7 @@ rtl::Reference < XMLPropertySetMapper > ODBExport::GetCellStylesPropertySetMappe
     return m_xCellStylesPropertySetMapper;
 }
 
-rtl::Reference < XMLPropertySetMapper > ODBExport::GetColumnStylesPropertySetMapper() const
+rtl::Reference < XMLPropertySetMapper > const & ODBExport::GetColumnStylesPropertySetMapper() const
 {
     if ( !m_xColumnStylesPropertySetMapper.is() )
     {
diff --git a/dbaccess/source/filter/xml/xmlExport.hxx b/dbaccess/source/filter/xml/xmlExport.hxx
index 4a25fcf2da67..3a335e2b4817 100644
--- a/dbaccess/source/filter/xml/xmlExport.hxx
+++ b/dbaccess/source/filter/xml/xmlExport.hxx
@@ -154,7 +154,7 @@ class ODBExport : public SvXMLExport
 
     static OUString         implConvertAny(const Any& _rValue);
 
-    rtl::Reference < XMLPropertySetMapper > GetTableStylesPropertySetMapper() const;
+    rtl::Reference < XMLPropertySetMapper > const & GetTableStylesPropertySetMapper() const;
 
                             ODBExport() = delete;
 protected:
@@ -183,8 +183,8 @@ public:
     static css::uno::Reference<css::uno::XInterface> SAL_CALL Create(
         css::uno::Reference<css::lang::XMultiServiceFactory> const & _rxORB);
 
-    rtl::Reference < XMLPropertySetMapper > GetColumnStylesPropertySetMapper() const;
-    rtl::Reference < XMLPropertySetMapper > GetCellStylesPropertySetMapper() const;
+    rtl::Reference < XMLPropertySetMapper > const & GetColumnStylesPropertySetMapper() const;
+    rtl::Reference < XMLPropertySetMapper > const & GetCellStylesPropertySetMapper() const;
 
     // XExporter
     virtual void SAL_CALL setSourceDocument( const css::uno::Reference< css::lang::XComponent >& xDoc ) throw(css::lang::IllegalArgumentException, css::uno::RuntimeException, std::exception) override;
diff --git a/dbaccess/source/filter/xml/xmlfilter.cxx b/dbaccess/source/filter/xml/xmlfilter.cxx
index dcc8f767116a..6608e91f3d83 100644
--- a/dbaccess/source/filter/xml/xmlfilter.cxx
+++ b/dbaccess/source/filter/xml/xmlfilter.cxx
@@ -734,7 +734,7 @@ SvXMLImportContext* ODBFilter::CreateScriptContext( const OUString& _rLocalName
 }
 
 
-rtl::Reference < XMLPropertySetMapper > ODBFilter::GetTableStylesPropertySetMapper() const
+rtl::Reference < XMLPropertySetMapper > const & ODBFilter::GetTableStylesPropertySetMapper() const
 {
     if ( !m_xTableStylesPropertySetMapper.is() )
     {
@@ -744,7 +744,7 @@ rtl::Reference < XMLPropertySetMapper > ODBFilter::GetTableStylesPropertySetMapp
 }
 
 
-rtl::Reference < XMLPropertySetMapper > ODBFilter::GetColumnStylesPropertySetMapper() const
+rtl::Reference < XMLPropertySetMapper > const & ODBFilter::GetColumnStylesPropertySetMapper() const
 {
     if ( !m_xColumnStylesPropertySetMapper.is() )
     {
@@ -754,7 +754,7 @@ rtl::Reference < XMLPropertySetMapper > ODBFilter::GetColumnStylesPropertySetMap
 }
 
 
-rtl::Reference < XMLPropertySetMapper > ODBFilter::GetCellStylesPropertySetMapper() const
+rtl::Reference < XMLPropertySetMapper > const & ODBFilter::GetCellStylesPropertySetMapper() const
 {
     if ( !m_xCellStylesPropertySetMapper.is() )
     {
diff --git a/dbaccess/source/filter/xml/xmlfilter.hxx b/dbaccess/source/filter/xml/xmlfilter.hxx
index 5db692434af9..7e47f458cdd6 100644
--- a/dbaccess/source/filter/xml/xmlfilter.hxx
+++ b/dbaccess/source/filter/xml/xmlfilter.hxx
@@ -139,9 +139,9 @@ public:
     const SvXMLTokenMap& GetQueryElemTokenMap() const;
     const SvXMLTokenMap& GetColumnElemTokenMap() const;
 
-    rtl::Reference < XMLPropertySetMapper > GetTableStylesPropertySetMapper() const;
-    rtl::Reference < XMLPropertySetMapper > GetColumnStylesPropertySetMapper() const;
-    rtl::Reference < XMLPropertySetMapper > GetCellStylesPropertySetMapper() const;
+    rtl::Reference < XMLPropertySetMapper > const & GetTableStylesPropertySetMapper() const;
+    rtl::Reference < XMLPropertySetMapper > const & GetColumnStylesPropertySetMapper() const;
+    rtl::Reference < XMLPropertySetMapper > const & GetCellStylesPropertySetMapper() const;
 
     /** add a Info to the sequence which will be appended to the data source
         @param  _rInfo The property to append.
diff --git a/dbaccess/source/ui/control/ColumnControlWindow.cxx b/dbaccess/source/ui/control/ColumnControlWindow.cxx
index 122cec748dcf..c3a1bb3af524 100644
--- a/dbaccess/source/ui/control/ColumnControlWindow.cxx
+++ b/dbaccess/source/ui/control/ColumnControlWindow.cxx
@@ -152,7 +152,7 @@ OUString OColumnControlWindow::getAutoIncrementValue() const
     return m_sAutoIncrementValue;
 }
 
-TOTypeInfoSP OColumnControlWindow::getDefaultTyp() const
+TOTypeInfoSP const & OColumnControlWindow::getDefaultTyp() const
 {
     if ( !m_pTypeInfo.get() )
     {
diff --git a/dbaccess/source/ui/dlg/DbAdminImpl.cxx b/dbaccess/source/ui/dlg/DbAdminImpl.cxx
index 6c80b1cccbe6..2490f0eaf31c 100644
--- a/dbaccess/source/ui/dlg/DbAdminImpl.cxx
+++ b/dbaccess/source/ui/dlg/DbAdminImpl.cxx
@@ -411,7 +411,7 @@ Reference< XDriver > ODbDataSourceAdministrationHelper::getDriver(const OUString
     return xDriver;
 }
 
-Reference< XPropertySet > ODbDataSourceAdministrationHelper::getCurrentDataSource()
+Reference< XPropertySet > const & ODbDataSourceAdministrationHelper::getCurrentDataSource()
 {
     if ( !m_xDatasource.is() )
     {
diff --git a/dbaccess/source/ui/dlg/DbAdminImpl.hxx b/dbaccess/source/ui/dlg/DbAdminImpl.hxx
index 64efba450f4e..7d6e90882e73 100644
--- a/dbaccess/source/ui/dlg/DbAdminImpl.hxx
+++ b/dbaccess/source/ui/dlg/DbAdminImpl.hxx
@@ -103,7 +103,7 @@ namespace dbaui
 
         /** returns the data source the dialog is currently working with
         */
-        css::uno::Reference< css::beans::XPropertySet >   getCurrentDataSource();
+        css::uno::Reference< css::beans::XPropertySet > const &  getCurrentDataSource();
         // returns the Url of a database document
         static OUString        getDocumentUrl(SfxItemSet& _rDest);
 
diff --git a/dbaccess/source/ui/dlg/sqlmessage.cxx b/dbaccess/source/ui/dlg/sqlmessage.cxx
index 4de77cc3e180..2df16e90ea24 100644
--- a/dbaccess/source/ui/dlg/sqlmessage.cxx
+++ b/dbaccess/source/ui/dlg/sqlmessage.cxx
@@ -68,7 +68,7 @@ namespace
         {
         }
 
-        Image getImage() const
+        Image const & getImage() const
         {
             if ( !m_defaultImage )
                 m_defaultImage = Image( ModuleRes( m_defaultImageID ) );
@@ -107,7 +107,7 @@ namespace
         {
         }
 
-        std::shared_ptr< ImageProvider >   getImageProvider( SQLExceptionInfo::TYPE _eType ) const
+        std::shared_ptr< ImageProvider > const & getImageProvider( SQLExceptionInfo::TYPE _eType ) const
         {
             std::shared_ptr< ImageProvider >* ppProvider( &m_pErrorImage );
             sal_uInt16 nNormalImageID( BMP_EXCEPTION_ERROR );
@@ -133,7 +133,7 @@ namespace
             return *ppProvider;
         }
 
-        std::shared_ptr< LabelProvider >   getLabelProvider( SQLExceptionInfo::TYPE _eType, bool _bSubLabel ) const
+        std::shared_ptr< LabelProvider > const & getLabelProvider( SQLExceptionInfo::TYPE _eType, bool _bSubLabel ) const
         {
             std::shared_ptr< LabelProvider >* ppProvider( &m_pErrorLabel );
             sal_uInt16 nLabelID( STR_EXCEPTION_ERROR );
diff --git a/dbaccess/source/ui/inc/ColumnControlWindow.hxx b/dbaccess/source/ui/inc/ColumnControlWindow.hxx
index 7a1cf40b5f5e..7c7f63a12e4e 100644
--- a/dbaccess/source/ui/inc/ColumnControlWindow.hxx
+++ b/dbaccess/source/ui/inc/ColumnControlWindow.hxx
@@ -61,7 +61,7 @@ namespace dbaui
         virtual css::uno::Reference< css::sdbc::XDatabaseMetaData> getMetaData() override;
         virtual css::uno::Reference< css::sdbc::XConnection> getConnection() override;
         virtual const OTypeInfoMap* getTypeInfo() const override;
-        TOTypeInfoSP getDefaultTyp() const;
+        TOTypeInfoSP const & getDefaultTyp() const;
     };
 }   // namespace dbaui
 #endif // INCLUDED_DBACCESS_SOURCE_UI_INC_COLUMNCONTROLWINDOW_HXX
diff --git a/dbaccess/source/ui/inc/WCopyTable.hxx b/dbaccess/source/ui/inc/WCopyTable.hxx
index 212d03445ffc..dd8c38c5ae9c 100644
--- a/dbaccess/source/ui/inc/WCopyTable.hxx
+++ b/dbaccess/source/ui/inc/WCopyTable.hxx
@@ -208,7 +208,7 @@ namespace dbaui
 
     private:
         void    impl_ensureColumnInfo_throw();
-        ::utl::SharedUNOComponent< css::sdbc::XPreparedStatement >
+        ::utl::SharedUNOComponent< css::sdbc::XPreparedStatement > const &
                 impl_ensureStatement_throw();
     };
 
diff --git a/dbaccess/source/ui/misc/WCopyTable.cxx b/dbaccess/source/ui/misc/WCopyTable.cxx
index 73281f417597..56142ceee651 100644
--- a/dbaccess/source/ui/misc/WCopyTable.cxx
+++ b/dbaccess/source/ui/misc/WCopyTable.cxx
@@ -330,7 +330,7 @@ void NamedTableCopySource::impl_ensureColumnInfo_throw()
     }
 }
 
-::utl::SharedUNOComponent< XPreparedStatement > NamedTableCopySource::impl_ensureStatement_throw()
+::utl::SharedUNOComponent< XPreparedStatement > const & NamedTableCopySource::impl_ensureStatement_throw()
 {
     if ( !m_xStatement.is() )
         m_xStatement.set( m_xConnection->prepareStatement( getSelectStatement() ), UNO_SET_THROW );
diff --git a/desktop/source/deployment/registry/dp_backenddb.cxx b/desktop/source/deployment/registry/dp_backenddb.cxx
index 535d9a4ba327..cf3f75b11541 100644
--- a/desktop/source/deployment/registry/dp_backenddb.cxx
+++ b/desktop/source/deployment/registry/dp_backenddb.cxx
@@ -63,7 +63,7 @@ void BackendDb::save()
     ucbDb.writeStream(xData, true /*replace existing*/);
 }
 
-css::uno::Reference<css::xml::dom::XDocument> BackendDb::getDocument()
+css::uno::Reference<css::xml::dom::XDocument> const & BackendDb::getDocument()
 {
     if (!m_doc.is())
     {
@@ -106,7 +106,7 @@ css::uno::Reference<css::xml::dom::XDocument> BackendDb::getDocument()
     return m_doc;
 }
 
-Reference<css::xml::xpath::XXPathAPI> BackendDb::getXPathAPI()
+Reference<css::xml::xpath::XXPathAPI> const & BackendDb::getXPathAPI()
 {
     if (!m_xpathApi.is())
     {
diff --git a/desktop/source/deployment/registry/help/dp_help.cxx b/desktop/source/deployment/registry/help/dp_help.cxx
index 8bed8bb89de0..73e1b43e1dc7 100644
--- a/desktop/source/deployment/registry/help/dp_help.cxx
+++ b/desktop/source/deployment/registry/help/dp_help.cxx
@@ -106,7 +106,7 @@ class BackendImpl : public ::dp_registry::backend::PackageRegistryBackend
     void revokeEntryFromDb(OUString const & url);
     bool activateEntry(OUString const & url);
 
-    Reference< ucb::XSimpleFileAccess3 > getFileAccess();
+    Reference< ucb::XSimpleFileAccess3 > const & getFileAccess();
     Reference< ucb::XSimpleFileAccess3 > m_xSFA;
 
     const Reference<deployment::XPackageTypeInfo> m_xHelpTypeInfo;
@@ -601,7 +601,7 @@ void BackendImpl::implCollectXhpFiles( const OUString& aDir,
     }
 }
 
-Reference< ucb::XSimpleFileAccess3 > BackendImpl::getFileAccess()
+Reference< ucb::XSimpleFileAccess3 > const & BackendImpl::getFileAccess()
 {
     if( !m_xSFA.is() )
     {
diff --git a/desktop/source/deployment/registry/inc/dp_backenddb.hxx b/desktop/source/deployment/registry/inc/dp_backenddb.hxx
index 36b15f82887e..8731cdc3d51e 100644
--- a/desktop/source/deployment/registry/inc/dp_backenddb.hxx
+++ b/desktop/source/deployment/registry/inc/dp_backenddb.hxx
@@ -58,11 +58,11 @@ protected:
 
     /* caller must make sure that only one thread accesses the function
      */
-    css::uno::Reference<css::xml::dom::XDocument> getDocument();
+    css::uno::Reference<css::xml::dom::XDocument> const & getDocument();
 
     /* the namespace prefix is "reg" (without quotes)
      */
-    css::uno::Reference<css::xml::xpath::XXPathAPI> getXPathAPI();
+    css::uno::Reference<css::xml::xpath::XXPathAPI> const & getXPathAPI();
     void save();
     void removeElement(OUString const & sXPathExpression);
 
diff --git a/editeng/source/accessibility/AccessibleEditableTextPara.cxx b/editeng/source/accessibility/AccessibleEditableTextPara.cxx
index 6813187b0f9d..a719dbf8d702 100644
--- a/editeng/source/accessibility/AccessibleEditableTextPara.cxx
+++ b/editeng/source/accessibility/AccessibleEditableTextPara.cxx
@@ -836,7 +836,7 @@ namespace accessibility
         }
     }
 
-    static uno::Sequence< OUString > getAttributeNames()
+    static uno::Sequence< OUString > const & getAttributeNames()
     {
         static uno::Sequence< OUString >* pNames = nullptr;
 
diff --git a/editeng/source/editeng/eerdll.cxx b/editeng/source/editeng/eerdll.cxx
index 1de90eb3567b..89d1b84e9f40 100644
--- a/editeng/source/editeng/eerdll.cxx
+++ b/editeng/source/editeng/eerdll.cxx
@@ -175,7 +175,7 @@ SfxPoolItem** GlobalEditData::GetDefItems()
     return ppDefItems;
 }
 
-rtl::Reference<SvxForbiddenCharactersTable> GlobalEditData::GetForbiddenCharsTable()
+rtl::Reference<SvxForbiddenCharactersTable> const & GlobalEditData::GetForbiddenCharsTable()
 {
     if ( !xForbiddenCharsTable.is() )
     {
@@ -184,7 +184,7 @@ rtl::Reference<SvxForbiddenCharactersTable> GlobalEditData::GetForbiddenCharsTab
     return xForbiddenCharsTable;
 }
 
-uno::Reference< linguistic2::XLanguageGuessing > GlobalEditData::GetLanguageGuesser()
+uno::Reference< linguistic2::XLanguageGuessing > const & GlobalEditData::GetLanguageGuesser()
 {
     if (!xLanguageGuesser.is())
     {
diff --git a/editeng/source/editeng/eerdll2.hxx b/editeng/source/editeng/eerdll2.hxx
index c19347de5af9..ffb96fe0aa19 100644
--- a/editeng/source/editeng/eerdll2.hxx
+++ b/editeng/source/editeng/eerdll2.hxx
@@ -40,9 +40,9 @@ public:
 
     SfxPoolItem**   GetDefItems();
 
-    rtl::Reference<SvxForbiddenCharactersTable> GetForbiddenCharsTable();
+    rtl::Reference<SvxForbiddenCharactersTable> const & GetForbiddenCharsTable();
     void            SetForbiddenCharsTable( rtl::Reference<SvxForbiddenCharactersTable> const & xForbiddenChars ) { xForbiddenCharsTable = xForbiddenChars; }
-    css::uno::Reference< css::linguistic2::XLanguageGuessing > GetLanguageGuesser();
+    css::uno::Reference< css::linguistic2::XLanguageGuessing > const & GetLanguageGuesser();
 };
 
 #endif // INCLUDED_EDITENG_SOURCE_EDITENG_EERDLL2_HXX
diff --git a/editeng/source/editeng/impedit.hxx b/editeng/source/editeng/impedit.hxx
index 1798234f246d..9bd6c6673364 100644
--- a/editeng/source/editeng/impedit.hxx
+++ b/editeng/source/editeng/impedit.hxx
@@ -679,8 +679,8 @@ private:
 
     void                SetValidPaperSize( const Size& rSz );
 
-    css::uno::Reference < css::i18n::XBreakIterator > ImplGetBreakIterator() const;
-    css::uno::Reference < css::i18n::XExtendedInputSequenceChecker > ImplGetInputSequenceChecker() const;
+    css::uno::Reference < css::i18n::XBreakIterator > const & ImplGetBreakIterator() const;
+    css::uno::Reference < css::i18n::XExtendedInputSequenceChecker > const & ImplGetInputSequenceChecker() const;
 
     void ImplUpdateOverflowingParaNum( sal_uInt32 );
     void ImplUpdateOverflowingLineNum( sal_uInt32, sal_uInt32, sal_uInt32 );
@@ -899,7 +899,7 @@ public:
     EditView*           GetActiveView() const   { return pActiveView; }
     void                SetActiveView( EditView* pView );
 
-    css::uno::Reference< css::linguistic2::XSpellChecker1 >
+    css::uno::Reference< css::linguistic2::XSpellChecker1 > const &
                         GetSpeller();
     void                SetSpeller( css::uno::Reference< css::linguistic2::XSpellChecker1 > const &xSpl )
                             { xSpeller = xSpl; }
diff --git a/editeng/source/editeng/impedit3.cxx b/editeng/source/editeng/impedit3.cxx
index 9fdb38929927..d31ecbe95427 100644
--- a/editeng/source/editeng/impedit3.cxx
+++ b/editeng/source/editeng/impedit3.cxx
@@ -4226,7 +4226,7 @@ void ImpEditEngine::ImplInitLayoutMode( OutputDevice* pOutDev, sal_Int32 nPara,
     ImplInitDigitMode( pOutDev, eLang );
 }
 
-Reference < i18n::XBreakIterator > ImpEditEngine::ImplGetBreakIterator() const
+Reference < i18n::XBreakIterator > const & ImpEditEngine::ImplGetBreakIterator() const
 {
     if ( !xBI.is() )
     {
@@ -4236,7 +4236,7 @@ Reference < i18n::XBreakIterator > ImpEditEngine::ImplGetBreakIterator() const
     return xBI;
 }
 
-Reference < i18n::XExtendedInputSequenceChecker > ImpEditEngine::ImplGetInputSequenceChecker() const
+Reference < i18n::XExtendedInputSequenceChecker > const & ImpEditEngine::ImplGetInputSequenceChecker() const
 {
     if ( !xISC.is() )
     {
diff --git a/editeng/source/editeng/impedit4.cxx b/editeng/source/editeng/impedit4.cxx
index 4dfd2d650e91..1facdd5e232b 100644
--- a/editeng/source/editeng/impedit4.cxx
+++ b/editeng/source/editeng/impedit4.cxx
@@ -1449,7 +1449,7 @@ css::lang::Locale ImpEditEngine::GetLocale( const EditPaM& rPaM ) const
     return LanguageTag( GetLanguage( rPaM ) ).getLocale();
 }
 
-Reference< XSpellChecker1 > ImpEditEngine::GetSpeller()
+Reference< XSpellChecker1 > const & ImpEditEngine::GetSpeller()
 {
     if ( !xSpeller.is() )
         xSpeller = LinguMgr::GetSpellChecker();
diff --git a/editeng/source/uno/unoipset.cxx b/editeng/source/uno/unoipset.cxx
index f325079d6eba..02c5d9d20618 100644
--- a/editeng/source/uno/unoipset.cxx
+++ b/editeng/source/uno/unoipset.cxx
@@ -261,7 +261,7 @@ const SfxItemPropertySimpleEntry* SvxItemPropertySet::getPropertyMapEntry(const
  }
 
 
-uno::Reference< beans::XPropertySetInfo >  SvxItemPropertySet::getPropertySetInfo() const
+uno::Reference< beans::XPropertySetInfo > const &  SvxItemPropertySet::getPropertySetInfo() const
 {
     if( !m_xInfo.is() )
         m_xInfo = new SfxItemPropertySetInfo( m_aPropertyMap );
diff --git a/embeddedobj/source/commonembedding/embedobj.cxx b/embeddedobj/source/commonembedding/embedobj.cxx
index cda0aade7fce..5142871421ff 100644
--- a/embeddedobj/source/commonembedding/embedobj.cxx
+++ b/embeddedobj/source/commonembedding/embedobj.cxx
@@ -389,7 +389,7 @@ void OCommonEmbeddedObject::SwitchStateTo_Impl( sal_Int32 nNextState )
 }
 
 
-uno::Sequence< sal_Int32 > OCommonEmbeddedObject::GetIntermediateStatesSequence_Impl( sal_Int32 nNewState )
+uno::Sequence< sal_Int32 > const & OCommonEmbeddedObject::GetIntermediateStatesSequence_Impl( sal_Int32 nNewState )
 {
     sal_Int32 nCurInd = 0;
     for ( nCurInd = 0; nCurInd < m_aAcceptedStates.getLength(); nCurInd++ )
diff --git a/embeddedobj/source/general/docholder.cxx b/embeddedobj/source/general/docholder.cxx
index 7dab0063a1c2..dabebe88cef3 100644
--- a/embeddedobj/source/general/docholder.cxx
+++ b/embeddedobj/source/general/docholder.cxx
@@ -818,7 +818,7 @@ bool DocumentHolder::HideUI( const uno::Reference< css::frame::XLayoutManager >&
 }
 
 
-uno::Reference< frame::XFrame > DocumentHolder::GetDocFrame()
+uno::Reference< frame::XFrame > const & DocumentHolder::GetDocFrame()
 {
     // the frame for outplace activation
     if ( !m_xFrame.is() )
diff --git a/embeddedobj/source/inc/commonembobj.hxx b/embeddedobj/source/inc/commonembobj.hxx
index b3f4524bbc30..72217defd907 100644
--- a/embeddedobj/source/inc/commonembobj.hxx
+++ b/embeddedobj/source/inc/commonembobj.hxx
@@ -186,7 +186,7 @@ private:
 
     void SwitchStateTo_Impl( sal_Int32 nNextState );
 
-    css::uno::Sequence< sal_Int32 > GetIntermediateStatesSequence_Impl( sal_Int32 nNewState );
+    css::uno::Sequence< sal_Int32 > const & GetIntermediateStatesSequence_Impl( sal_Int32 nNewState );
 
     OUString GetFilterName( sal_Int32 nVersion ) const;
     css::uno::Reference< css::util::XCloseable > LoadDocumentFromStorage_Impl();
diff --git a/embeddedobj/source/inc/docholder.hxx b/embeddedobj/source/inc/docholder.hxx
index 10a9b57cac30..3e627257e31e 100644
--- a/embeddedobj/source/inc/docholder.hxx
+++ b/embeddedobj/source/inc/docholder.hxx
@@ -82,7 +82,7 @@ private:
     css::uno::Sequence< css::uno::Any > m_aOutplaceFrameProps;
 
 
-    css::uno::Reference< css::frame::XFrame > GetDocFrame();
+    css::uno::Reference< css::frame::XFrame > const & GetDocFrame();
     bool LoadDocToFrame( bool );
 
     css::awt::Rectangle CalculateBorderedArea( const css::awt::Rectangle& aRect );
diff --git a/extensions/source/bibliography/bibconfig.cxx b/extensions/source/bibliography/bibconfig.cxx
index 9b59d388ac4d..34fd9a2b6bc9 100644
--- a/extensions/source/bibliography/bibconfig.cxx
+++ b/extensions/source/bibliography/bibconfig.cxx
@@ -37,7 +37,7 @@ using namespace ::com::sun::star::sdb;
 
 const char cDataSourceHistory[] = "DataSourceHistory";
 
-Sequence<OUString> BibConfig::GetPropertyNames()
+Sequence<OUString> const & BibConfig::GetPropertyNames()
 {
     static Sequence<OUString> aNames;
     if(!aNames.getLength())
diff --git a/extensions/source/bibliography/bibconfig.hxx b/extensions/source/bibliography/bibconfig.hxx
index c260f8efcbd0..f4dba759f2e0 100644
--- a/extensions/source/bibliography/bibconfig.hxx
+++ b/extensions/source/bibliography/bibconfig.hxx
@@ -101,7 +101,7 @@ class BibConfig : public utl::ConfigItem
 
     OUString               aColumnDefaults[COLUMN_COUNT];
 
-    static css::uno::Sequence<OUString> GetPropertyNames();
+    static css::uno::Sequence<OUString> const & GetPropertyNames();
 
     virtual void    ImplCommit() override;
 
diff --git a/extensions/source/bibliography/bibload.cxx b/extensions/source/bibliography/bibload.cxx
index 3bff83b5ea0a..3d9d4756afc2 100644
--- a/extensions/source/bibliography/bibload.cxx
+++ b/extensions/source/bibliography/bibload.cxx
@@ -88,9 +88,9 @@ private:
                                 const Reference< XLoadEventListener > & aListener);
 
     BibDataManager*         GetDataManager()const;
-    Reference< XNameAccess >            GetDataColumns() const;
-    Reference< XResultSet >             GetDataCursor() const;
-    Reference< sdb::XColumn >               GetIdentifierColumn() const;
+    Reference< XNameAccess > const &    GetDataColumns() const;
+    Reference< XResultSet > const &     GetDataCursor() const;
+    Reference< sdb::XColumn >           GetIdentifierColumn() const;
 
 public:
                             BibliographyLoader();
@@ -336,7 +336,7 @@ BibDataManager* BibliographyLoader::GetDataManager()const
     return m_pDatMan;
 }
 
-Reference< XNameAccess >  BibliographyLoader::GetDataColumns() const
+Reference< XNameAccess > const & BibliographyLoader::GetDataColumns() const
 {
     if (!m_xColumns.is())
     {
@@ -406,7 +406,7 @@ Reference< sdb::XColumn >  BibliographyLoader::GetIdentifierColumn() const
     return xReturn;
 }
 
-Reference< XResultSet >  BibliographyLoader::GetDataCursor() const
+Reference< XResultSet > const &  BibliographyLoader::GetDataCursor() const
 {
     if (!m_xCursor.is())
         GetDataColumns();
diff --git a/extensions/source/bibliography/datman.cxx b/extensions/source/bibliography/datman.cxx
index 930a11543e13..8ce8ba0f6f37 100644
--- a/extensions/source/bibliography/datman.cxx
+++ b/extensions/source/bibliography/datman.cxx
@@ -744,7 +744,7 @@ Reference< awt::XControlModel > BibDataManager::updateGridModel()
     return updateGridModel( m_xForm );
 }
 
-Reference< awt::XControlModel > BibDataManager::updateGridModel(const Reference< XForm > & xDbForm)
+Reference< awt::XControlModel > const & BibDataManager::updateGridModel(const Reference< XForm > & xDbForm)
 {
     try
     {
@@ -1595,7 +1595,7 @@ void BibDataManager::SetToolbar(BibToolBar* pSet)
         pToolbar->SetDatMan(*this);
 }
 
-uno::Reference< form::runtime::XFormController > BibDataManager::GetFormController()
+uno::Reference< form::runtime::XFormController > const & BibDataManager::GetFormController()
 {
     if(!m_xFormCtrl.is())
     {
diff --git a/extensions/source/bibliography/datman.hxx b/extensions/source/bibliography/datman.hxx
index 5bda57645fa2..19fd5506bec9 100644
--- a/extensions/source/bibliography/datman.hxx
+++ b/extensions/source/bibliography/datman.hxx
@@ -106,7 +106,7 @@ protected:
         void                        SetMeAsUidListener();
         void                        RemoveMeAsUidListener();
 
-        css::uno::Reference< css::awt::XControlModel >
+        css::uno::Reference< css::awt::XControlModel > const &
                                     updateGridModel(const css::uno::Reference< css::form::XForm > & xDbForm);
         static css::uno::Reference< css::awt::XControlModel >
                                     createGridModel( const OUString& rName );
@@ -172,7 +172,7 @@ public:
         const OUString&             GetIdentifierMapping();
         void                        ResetIdentifierMapping() {sIdentifierMapping.clear();}
 
-        css::uno::Reference< css::form::runtime::XFormController > GetFormController();
+        css::uno::Reference< css::form::runtime::XFormController > const & GetFormController();
         void                        RegisterInterceptor( ::bib::BibBeamer* pBibBeamer);
 
         bool                        HasActiveConnection();
diff --git a/extensions/source/propctrlr/composeduiupdate.cxx b/extensions/source/propctrlr/composeduiupdate.cxx
index 398dea7129d6..8295cdd3bd76 100644
--- a/extensions/source/propctrlr/composeduiupdate.cxx
+++ b/extensions/source/propctrlr/composeduiupdate.cxx
@@ -746,7 +746,7 @@ namespace pcr
     }
 
 
-    Reference< XObjectInspectorUI > ComposedPropertyUIUpdate::getDelegatorUI() const
+    Reference< XObjectInspectorUI > const & ComposedPropertyUIUpdate::getDelegatorUI() const
     {
         impl_checkDisposed();
         return m_xDelegatorUI;
diff --git a/extensions/source/propctrlr/composeduiupdate.hxx b/extensions/source/propctrlr/composeduiupdate.hxx
index 30011afe0bcd..bd2539f56ada 100644
--- a/extensions/source/propctrlr/composeduiupdate.hxx
+++ b/extensions/source/propctrlr/composeduiupdate.hxx
@@ -89,7 +89,7 @@ namespace pcr
         /** returns the delegator UI
             @throw css::lang::DisposedException
         */
-        css::uno::Reference< css::inspection::XObjectInspectorUI > getDelegatorUI() const;
+        css::uno::Reference< css::inspection::XObjectInspectorUI > const & getDelegatorUI() const;
 
         /** returns a ->XObjectInspectorUI instance belonging to a given property handler
 
diff --git a/filter/source/flash/swfwriter.hxx b/filter/source/flash/swfwriter.hxx
index 0a2ea581ce5c..8d3c8b4a0801 100644
--- a/filter/source/flash/swfwriter.hxx
+++ b/filter/source/flash/swfwriter.hxx
@@ -368,7 +368,7 @@ private:
                                    const double P3x, const double P3y,
                                    const double P4x, const double P4y );
 
-    css::uno::Reference < css::i18n::XBreakIterator > Impl_GetBreakIterator();
+    css::uno::Reference < css::i18n::XBreakIterator > const & Impl_GetBreakIterator();
 
 private:
     css::uno::Reference< css::i18n::XBreakIterator > mxBreakIterator;
diff --git a/filter/source/flash/swfwriter1.cxx b/filter/source/flash/swfwriter1.cxx
index 5d1d057c762e..05058d00c6c4 100644
--- a/filter/source/flash/swfwriter1.cxx
+++ b/filter/source/flash/swfwriter1.cxx
@@ -1987,7 +1987,7 @@ void Writer::Impl_quadBezierApprox( BitStream& rBits,
     }
 }
 
-Reference < XBreakIterator > Writer::Impl_GetBreakIterator()
+Reference < XBreakIterator > const & Writer::Impl_GetBreakIterator()
 {
     if ( !mxBreakIterator.is() )
     {
diff --git a/formula/source/ui/dlg/formula.cxx b/formula/source/ui/dlg/formula.cxx
index ae2f189948bf..6173a5ae8c31 100644
--- a/formula/source/ui/dlg/formula.cxx
+++ b/formula/source/ui/dlg/formula.cxx
@@ -122,7 +122,7 @@ public:
     RefEdit*        GetCurrRefEdit();
 
     const FormulaHelper& GetFormulaHelper() const { return m_aFormulaHelper;}
-    uno::Reference< sheet::XFormulaOpCodeMapper > GetFormulaOpCodeMapper() const;
+    uno::Reference< sheet::XFormulaOpCodeMapper > const & GetFormulaOpCodeMapper() const;
 
     DECL_LINK_TYPED( ModifyHdl, ParaWin&, void );
     DECL_LINK_TYPED( FxHdl, ParaWin&, void );
@@ -404,7 +404,7 @@ void FormulaDlg_Impl::PreNotify( NotifyEvent& rNEvt )
     pData->SetFocusWindow(pWin);
 }
 
-uno::Reference< sheet::XFormulaOpCodeMapper > FormulaDlg_Impl::GetFormulaOpCodeMapper() const
+uno::Reference< sheet::XFormulaOpCodeMapper > const & FormulaDlg_Impl::GetFormulaOpCodeMapper() const
 {
     if ( !m_xOpCodeMapper.is() )
     {
diff --git a/framework/inc/helper/mischelper.hxx b/framework/inc/helper/mischelper.hxx
index 84d3dc599795..99998563bde8 100644
--- a/framework/inc/helper/mischelper.hxx
+++ b/framework/inc/helper/mischelper.hxx
@@ -118,7 +118,7 @@ class FWI_DLLPUBLIC LanguageGuessingHelper
 public:
     LanguageGuessingHelper(const css::uno::Reference< css::uno::XComponentContext >& _xContext) : m_xContext(_xContext){}
 
-    css::uno::Reference< css::linguistic2::XLanguageGuessing >  GetGuesser() const;
+    css::uno::Reference< css::linguistic2::XLanguageGuessing > const &  GetGuesser() const;
 };
 
 FWI_DLLPUBLIC void FillLangItems( std::set< OUString > &rLangItems,
diff --git a/framework/source/fwe/classes/imagewrapper.cxx b/framework/source/fwe/classes/imagewrapper.cxx
index 1924eeb1c136..98897e39149a 100644
--- a/framework/source/fwe/classes/imagewrapper.cxx
+++ b/framework/source/fwe/classes/imagewrapper.cxx
@@ -32,7 +32,7 @@ using namespace com::sun::star::uno;
 namespace framework
 {
 
-static Sequence< sal_Int8 > impl_getStaticIdentifier()
+static Sequence< sal_Int8 > const & impl_getStaticIdentifier()
 {
     static const sal_uInt8 pGUID[16] = { 0x46, 0xAD, 0x69, 0xFB, 0xA7, 0xBE, 0x44, 0x83, 0xB2, 0xA7, 0xB3, 0xEC, 0x59, 0x4A, 0xB7, 0x00 };
     static css::uno::Sequence< sal_Int8 > seqID(reinterpret_cast<const sal_Int8*>(pGUID), 16);
diff --git a/framework/source/fwe/classes/rootactiontriggercontainer.cxx b/framework/source/fwe/classes/rootactiontriggercontainer.cxx
index f58cdcc5c500..7c4312470c8b 100644
--- a/framework/source/fwe/classes/rootactiontriggercontainer.cxx
+++ b/framework/source/fwe/classes/rootactiontriggercontainer.cxx
@@ -37,7 +37,7 @@ using namespace com::sun::star::beans;
 namespace framework
 {
 
-static Sequence< sal_Int8 > impl_getStaticIdentifier()
+static Sequence< sal_Int8 > const & impl_getStaticIdentifier()
 {
     static const sal_uInt8 pGUID[16] = { 0x17, 0x0F, 0xA2, 0xC9, 0xCA, 0x50, 0x4A, 0xD3, 0xA6, 0x3B, 0x39, 0x99, 0xC5, 0x96, 0x43, 0x27 };
     static css::uno::Sequence< sal_Int8 > seqID(reinterpret_cast<const sal_Int8*>(pGUID), 16);
diff --git a/framework/source/fwi/helper/mischelper.cxx b/framework/source/fwi/helper/mischelper.cxx
index 7eb5a403373e..7ce88b29c5fc 100644
--- a/framework/source/fwi/helper/mischelper.cxx
+++ b/framework/source/fwi/helper/mischelper.cxx
@@ -43,7 +43,7 @@ using namespace ::com::sun::star::lang;
 namespace framework
 {
 
-uno::Reference< linguistic2::XLanguageGuessing > LanguageGuessingHelper::GetGuesser() const
+uno::Reference< linguistic2::XLanguageGuessing > const & LanguageGuessingHelper::GetGuesser() const
 {
     if (!m_xLanguageGuesser.is())
     {
diff --git a/framework/source/services/substitutepathvars.cxx b/framework/source/services/substitutepathvars.cxx
index 0e611e607d6f..b46cb213821f 100644
--- a/framework/source/services/substitutepathvars.cxx
+++ b/framework/source/services/substitutepathvars.cxx
@@ -274,7 +274,7 @@ protected:
         throw (css::container::NoSuchElementException, css::uno::RuntimeException);
     OUString impl_reSubstituteVariables( const OUString& aText )
         throw (css::uno::RuntimeException);
-    OUString impl_getSubstituteVariableValue( const OUString& variable )
+    OUString const & impl_getSubstituteVariableValue( const OUString& variable )
         throw (css::container::NoSuchElementException, css::uno::RuntimeException);
 
 private:
@@ -1147,7 +1147,7 @@ throw ( RuntimeException )
 }
 
 // This method support both request schemes "$("<varname>")" or "<varname>".
-OUString SubstitutePathVariables::impl_getSubstituteVariableValue( const OUString& rVariable )
+OUString const & SubstitutePathVariables::impl_getSubstituteVariableValue( const OUString& rVariable )
 throw ( NoSuchElementException, RuntimeException )
 {
     OUString aVariable;
diff --git a/i18nlangtag/source/languagetag/languagetag.cxx b/i18nlangtag/source/languagetag/languagetag.cxx
index b34a5e93a8e4..f87fe583f64b 100644
--- a/i18nlangtag/source/languagetag/languagetag.cxx
+++ b/i18nlangtag/source/languagetag/languagetag.cxx
@@ -280,12 +280,12 @@ private:
     mutable bool                            mbCachedCountry     : 1;
     mutable bool                            mbCachedVariants    : 1;
 
-    const OUString &    getBcp47() const;
-    OUString            getLanguage() const;
-    OUString            getScript() const;
-    OUString            getCountry() const;
+    OUString const &    getBcp47() const;
+    OUString const &    getLanguage() const;
+    OUString const &    getScript() const;
+    OUString const &    getCountry() const;
     OUString            getRegion() const;
-    OUString            getVariants() const;
+    OUString const &    getVariants() const;
     bool                hasScript() const;
 
     bool                isIsoLocale() const;
@@ -996,7 +996,7 @@ LanguageTag::ImplPtr LanguageTag::registerImpl() const
 }
 
 
-LanguageTag::ImplPtr LanguageTag::getImpl() const
+LanguageTag::ImplPtr const & LanguageTag::getImpl() const
 {
     if (!mpImpl)
     {
@@ -1802,7 +1802,7 @@ bool LanguageTag::isIsoScript( const OUString& rScript )
 }
 
 
-OUString LanguageTagImpl::getLanguage() const
+OUString const & LanguageTagImpl::getLanguage() const
 {
     if (!mbCachedLanguage)
     {
@@ -1824,7 +1824,7 @@ OUString LanguageTag::getLanguage() const
 }
 
 
-OUString LanguageTagImpl::getScript() const
+OUString const & LanguageTagImpl::getScript() const
 {
     if (!mbCachedScript)
     {
@@ -1858,7 +1858,7 @@ OUString LanguageTag::getLanguageAndScript() const
 }
 
 
-OUString LanguageTagImpl::getCountry() const
+OUString const & LanguageTagImpl::getCountry() const
 {
     if (!mbCachedCountry)
     {
@@ -1888,7 +1888,7 @@ OUString LanguageTagImpl::getRegion() const
 }
 
 
-OUString LanguageTagImpl::getVariants() const
+OUString const & LanguageTagImpl::getVariants() const
 {
     if (!mbCachedVariants)
     {
diff --git a/i18npool/inc/characterclassificationImpl.hxx b/i18npool/inc/characterclassificationImpl.hxx
index ef44b2655ef8..b775e10a7110 100644
--- a/i18npool/inc/characterclassificationImpl.hxx
+++ b/i18npool/inc/characterclassificationImpl.hxx
@@ -99,7 +99,7 @@ private:
     css::uno::Reference < css::uno::XComponentContext > m_xContext;
     css::uno::Reference < XCharacterClassification > xUCI;
 
-    css::uno::Reference < XCharacterClassification > SAL_CALL getLocaleSpecificCharacterClassification(const css::lang::Locale& rLocale)
+    css::uno::Reference < XCharacterClassification > const & SAL_CALL getLocaleSpecificCharacterClassification(const css::lang::Locale& rLocale)
         throw(css::uno::RuntimeException);
     bool SAL_CALL createLocaleSpecificCharacterClassification(const OUString& serviceName, const css::lang::Locale& rLocale);
 
diff --git a/i18npool/inc/indexentrysupplier.hxx b/i18npool/inc/indexentrysupplier.hxx
index 8b5921129a9e..594059e96b68 100644
--- a/i18npool/inc/indexentrysupplier.hxx
+++ b/i18npool/inc/indexentrysupplier.hxx
@@ -89,7 +89,7 @@ private:
     css::uno::Reference < css::i18n::XExtendedIndexEntrySupplier > xIES;
     css::uno::Reference < css::uno::XComponentContext > m_xContext;
     bool SAL_CALL createLocaleSpecificIndexEntrySupplier(const OUString& name) throw( css::uno::RuntimeException );
-    css::uno::Reference < css::i18n::XExtendedIndexEntrySupplier > SAL_CALL getLocaleSpecificIndexEntrySupplier(
+    css::uno::Reference < css::i18n::XExtendedIndexEntrySupplier > const & SAL_CALL getLocaleSpecificIndexEntrySupplier(
         const css::lang::Locale& rLocale, const OUString& rSortAlgorithm) throw (css::uno::RuntimeException);
 
 protected:
diff --git a/i18npool/inc/xdictionary.hxx b/i18npool/inc/xdictionary.hxx
index ed6b269aa3c0..09707ff37e8b 100644
--- a/i18npool/inc/xdictionary.hxx
+++ b/i18npool/inc/xdictionary.hxx
@@ -71,7 +71,7 @@ public:
     ~xdictionary();
     Boundary nextWord( const OUString& rText, sal_Int32 nPos, sal_Int16 wordType);
     Boundary previousWord( const OUString& rText, sal_Int32 nPos, sal_Int16 wordType);
-    Boundary getWordBoundary( const OUString& rText, sal_Int32 nPos, sal_Int16 wordType, bool bDirection );
+    Boundary const & getWordBoundary( const OUString& rText, sal_Int32 nPos, sal_Int16 wordType, bool bDirection );
     void setJapaneseWordBreak();
 
 private:
diff --git a/i18npool/source/breakiterator/xdictionary.cxx b/i18npool/source/breakiterator/xdictionary.cxx
index 551ce859592b..69aba9c43ae4 100644
--- a/i18npool/source/breakiterator/xdictionary.cxx
+++ b/i18npool/source/breakiterator/xdictionary.cxx
@@ -428,7 +428,7 @@ Boundary xdictionary::nextWord(const OUString& rText, sal_Int32 anyPos, sal_Int1
         return getWordBoundary(rText, anyPos, wordType, true);
 }
 
-Boundary xdictionary::getWordBoundary(const OUString& rText, sal_Int32 anyPos, sal_Int16 wordType, bool bDirection)
+Boundary const & xdictionary::getWordBoundary(const OUString& rText, sal_Int32 anyPos, sal_Int16 wordType, bool bDirection)
 {
         const sal_Unicode *text=rText.getStr();
         sal_Int32 len=rText.getLength();
diff --git a/i18npool/source/characterclassification/characterclassificationImpl.cxx b/i18npool/source/characterclassification/characterclassificationImpl.cxx
index 41aa591bb148..424f5ca994a6 100644
--- a/i18npool/source/characterclassification/characterclassificationImpl.cxx
+++ b/i18npool/source/characterclassification/characterclassificationImpl.cxx
@@ -152,7 +152,7 @@ bool SAL_CALL CharacterClassificationImpl::createLocaleSpecificCharacterClassifi
     return false;
 }
 
-Reference < XCharacterClassification > SAL_CALL
+Reference < XCharacterClassification > const & SAL_CALL
 CharacterClassificationImpl::getLocaleSpecificCharacterClassification(const Locale& rLocale)
         throw(RuntimeException)
 {
diff --git a/i18npool/source/indexentry/indexentrysupplier.cxx b/i18npool/source/indexentry/indexentrysupplier.cxx
index ed3dbe70b4b9..2ade78f958a4 100644
--- a/i18npool/source/indexentry/indexentrysupplier.cxx
+++ b/i18npool/source/indexentry/indexentrysupplier.cxx
@@ -110,7 +110,7 @@ bool SAL_CALL IndexEntrySupplier::createLocaleSpecificIndexEntrySupplier(const O
     return false;
 }
 
-Reference < css::i18n::XExtendedIndexEntrySupplier > SAL_CALL
+Reference < css::i18n::XExtendedIndexEntrySupplier > const & SAL_CALL
 IndexEntrySupplier::getLocaleSpecificIndexEntrySupplier(const Locale& rLocale, const OUString& rSortAlgorithm) throw (RuntimeException)
 {
     if (xIES.is() && rSortAlgorithm == aSortAlgorithm && rLocale.Language == aLocale.Language &&
diff --git a/include/basic/sbmod.hxx b/include/basic/sbmod.hxx
index 3727d1dcfbb6..03d6fb2151a9 100644
--- a/include/basic/sbmod.hxx
+++ b/include/basic/sbmod.hxx
@@ -128,7 +128,7 @@ public:
     bool     isProxyModule() { return bIsProxyModule; }
     void     AddVarName( const OUString& aName );
     void     RemoveVars();
-    css::uno::Reference< css::script::XInvocation > GetUnoModule();
+    css::uno::Reference< css::script::XInvocation > const & GetUnoModule();
     bool     createCOMWrapperForIface( css::uno::Any& o_rRetAny, SbClassModuleObject* pProxyClassModuleObject );
     void     GetCodeCompleteDataFromParse(CodeCompleteDataCache& aCache);
     const SbxArrayRef& GetMethods() { return pMethods;}
diff --git a/include/basic/sbstar.hxx b/include/basic/sbstar.hxx
index 1fda1b5310a3..47f21bc3aec0 100644
--- a/include/basic/sbstar.hxx
+++ b/include/basic/sbstar.hxx
@@ -144,7 +144,7 @@ public:
 
     static void     SetGlobalBreakHdl( const Link<StarBASIC*,sal_uInt16>& rNewHdl );
 
-    SbxArrayRef     getUnoListeners();
+    SbxArrayRef const & getUnoListeners();
 
     static SbxBase* FindSBXInCurrentScope( const OUString& rName );
     static SbMethod* GetActiveMethod( sal_uInt16 nLevel = 0 );
diff --git a/include/codemaker/options.hxx b/include/codemaker/options.hxx
index 2d7ddbf1d07e..5a0f0dba3d70 100644
--- a/include/codemaker/options.hxx
+++ b/include/codemaker/options.hxx
@@ -52,7 +52,7 @@ public:
 
     const ::rtl::OString&   getProgramName() const { return m_program;}
     bool                isValid(const ::rtl::OString& option) const;
-    const ::rtl::OString    getOption(const ::rtl::OString& option) const
+    const OString&      getOption(const ::rtl::OString& option) const
         throw( IllegalArgument );
 
     const StringVector& getInputFiles() { return m_inputFiles;}
diff --git a/include/comphelper/accessibletexthelper.hxx b/include/comphelper/accessibletexthelper.hxx
index 7dd0fc5155ef..368e468a5978 100644
--- a/include/comphelper/accessibletexthelper.hxx
+++ b/include/comphelper/accessibletexthelper.hxx
@@ -48,8 +48,8 @@ namespace comphelper
         OCommonAccessibleText();
         virtual ~OCommonAccessibleText();
 
-        css::uno::Reference < css::i18n::XBreakIterator >             implGetBreakIterator();
-        css::uno::Reference < css::i18n::XCharacterClassification >   implGetCharacterClassification();
+        css::uno::Reference < css::i18n::XBreakIterator > const &            implGetBreakIterator();
+        css::uno::Reference < css::i18n::XCharacterClassification > const &  implGetCharacterClassification();
         static bool                      implIsValidBoundary( css::i18n::Boundary& rBoundary, sal_Int32 nLength );
         static bool                      implIsValidIndex( sal_Int32 nIndex, sal_Int32 nLength );
         static bool                      implIsValidRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex, sal_Int32 nLength );
diff --git a/include/comphelper/container.hxx b/include/comphelper/container.hxx
index 12b33ab92c93..03a7e96de77c 100644
--- a/include/comphelper/container.hxx
+++ b/include/comphelper/container.hxx
@@ -51,7 +51,7 @@ public:
 
     virtual ~IndexAccessIterator();
 
-    css::uno::Reference< css::uno::XInterface>    Next();
+    css::uno::Reference< css::uno::XInterface> const &    Next();
 
     virtual void Invalidate() { m_xCurrentObject = nullptr; }
 
diff --git a/include/connectivity/dbconversion.hxx b/include/connectivity/dbconversion.hxx
index a79436eb5685..0c604025a653 100644
--- a/include/connectivity/dbconversion.hxx
+++ b/include/connectivity/dbconversion.hxx
@@ -67,7 +67,7 @@ namespace dbtools
 {
     namespace DBTypeConversion
     {
-        OOO_DLLPUBLIC_DBTOOLS css::util::Date getStandardDate();
+        OOO_DLLPUBLIC_DBTOOLS css::util::Date const & getStandardDate();
         OOO_DLLPUBLIC_DBTOOLS void setValue(const css::uno::Reference< css::sdb::XColumnUpdate>& xVariant,
                                     const css::uno::Reference< css::util::XNumberFormatter>& xFormatter,
                                     const css::util::Date& rNullDate,
diff --git a/include/editeng/unoipset.hxx b/include/editeng/unoipset.hxx
index fc24cfbcf99e..9eeede104735 100644
--- a/include/editeng/unoipset.hxx
+++ b/include/editeng/unoipset.hxx
@@ -57,7 +57,7 @@ public:
     void AddUsrAnyForID(const css::uno::Any& rAny, sal_uInt16 nWID);
     void ClearAllUsrAny();
 
-    css::uno::Reference< css::beans::XPropertySetInfo > getPropertySetInfo() const;
+    css::uno::Reference< css::beans::XPropertySetInfo > const & getPropertySetInfo() const;
     const SfxItemPropertyMap& getPropertyMap() const { return m_aPropertyMap;}
     const SfxItemPropertySimpleEntry* getPropertyMapEntry(const OUString &rName) const;
 };
diff --git a/include/i18nlangtag/languagetag.hxx b/include/i18nlangtag/languagetag.hxx
index f494d78bfb25..a1b1bb9104f7 100644
--- a/include/i18nlangtag/languagetag.hxx
+++ b/include/i18nlangtag/languagetag.hxx
@@ -514,7 +514,7 @@ private:
     mutable bool                            mbInitializedLangID : 1;
             bool                            mbIsFallback        : 1;
 
-    ImplPtr             getImpl() const;
+    ImplPtr const &     getImpl() const;
     ImplPtr             registerImpl() const;
     void                syncFromImpl();
     void                syncVarsFromRawImpl() const;
diff --git a/include/oox/drawingml/shape.hxx b/include/oox/drawingml/shape.hxx
index 520bc51bc1f9..1367e2e22d1d 100644
--- a/include/oox/drawingml/shape.hxx
+++ b/include/oox/drawingml/shape.hxx
@@ -123,7 +123,7 @@ public:
     Shape3DProperties&              get3DProperties() { return *mp3DPropertiesPtr; }
     const Shape3DProperties&        get3DProperties() const { return *mp3DPropertiesPtr; }
 
-    table::TablePropertiesPtr       getTableProperties();
+    table::TablePropertiesPtr const & getTableProperties();
 
     EffectProperties&               getEffectProperties() { return *mpEffectPropertiesPtr; }
 
@@ -216,7 +216,7 @@ public:
 
 protected:
 
-    css::uno::Reference< css::drawing::XShape >
+    css::uno::Reference< css::drawing::XShape > const &
                         createAndInsert(
                             ::oox::core::XmlFilterBase& rFilterBase,
                             const OUString& rServiceName,
diff --git a/include/oox/ole/axcontrol.hxx b/include/oox/ole/axcontrol.hxx
index 4d91f975fc1c..71c8118678c2 100644
--- a/include/oox/ole/axcontrol.hxx
+++ b/include/oox/ole/axcontrol.hxx
@@ -985,7 +985,7 @@ public:
 
 private:
     /** Creates the form that will hold the form controls. */
-    css::uno::Reference< css::container::XIndexContainer >
+    css::uno::Reference< css::container::XIndexContainer > const &
                         createXForm();
 
 private:
diff --git a/include/oox/ole/vbaproject.hxx b/include/oox/ole/vbaproject.hxx
index ea7ffcccd351..b7bbd4e1e9be 100644
--- a/include/oox/ole/vbaproject.hxx
+++ b/include/oox/ole/vbaproject.hxx
@@ -166,10 +166,10 @@ private:
     css::uno::Reference< css::container::XNameContainer >
                         openLibrary( sal_Int32 nPropId, bool bCreateMissing );
     /** Creates and returns the Basic library of the document used for import. */
-    css::uno::Reference< css::container::XNameContainer >
+    css::uno::Reference< css::container::XNameContainer > const &
                         createBasicLibrary();
     /** Creates and returns the dialog library of the document used for import. */
-    css::uno::Reference< css::container::XNameContainer >
+    css::uno::Reference< css::container::XNameContainer > const &
                         createDialogLibrary();
 
     /** Imports the VBA code modules and forms. */
diff --git a/include/oox/ppt/timenode.hxx b/include/oox/ppt/timenode.hxx
index 546f73a45674..40f51bc54964 100644
--- a/include/oox/ppt/timenode.hxx
+++ b/include/oox/ppt/timenode.hxx
@@ -77,7 +77,7 @@ namespace oox { namespace ppt {
             const css::uno::Reference< css::animations::XAnimationNode >& xNode,
             const SlidePersistPtr & pSlide );
 
-        AnimTargetElementPtr getTarget()
+        AnimTargetElementPtr const & getTarget()
             {
                 if( !mpTarget )
                     mpTarget.reset( new AnimTargetElement );
diff --git a/include/sfx2/docfile.hxx b/include/sfx2/docfile.hxx
index ee92f8da0800..a08c22b7bdb7 100644
--- a/include/sfx2/docfile.hxx
+++ b/include/sfx2/docfile.hxx
@@ -118,7 +118,7 @@ public:
      */
     void                SetFilter(const std::shared_ptr<const SfxFilter>& pFilter);
     const std::shared_ptr<const SfxFilter>& GetFilter() const;
-    std::shared_ptr<const SfxFilter>    GetOrigFilter() const;
+    std::shared_ptr<const SfxFilter> const & GetOrigFilter() const;
     const OUString&     GetOrigURL() const;
 
     SfxItemSet  *       GetItemSet() const;
diff --git a/include/sfx2/sfxbasemodel.hxx b/include/sfx2/sfxbasemodel.hxx
index 8e678caf59e0..e6c618bdf274 100644
--- a/include/sfx2/sfxbasemodel.hxx
+++ b/include/sfx2/sfxbasemodel.hxx
@@ -822,7 +822,7 @@ protected:
 
     /* returns a unique id for the model that is valid as long as the document
        is loaded. The id is not saved across document close/reload. */
-    OUString getRuntimeUID() const;
+    OUString const & getRuntimeUID() const;
 
     /* returns true if the document signatures are valid, otherwise false */
     bool hasValidSignatures() const;
diff --git a/include/sfx2/thumbnailviewitem.hxx b/include/sfx2/thumbnailviewitem.hxx
index c37d6aac7276..ed3c4231f5e5 100644
--- a/include/sfx2/thumbnailviewitem.hxx
+++ b/include/sfx2/thumbnailviewitem.hxx
@@ -109,7 +109,7 @@ public:
 
     void setTitle (const OUString& rTitle);
 
-    css::uno::Reference< css::accessibility::XAccessible >
+    css::uno::Reference< css::accessibility::XAccessible > const &
                         GetAccessible( bool bIsTransientChildrenDisabled );
 
     void setDrawArea (const Rectangle &area);
diff --git a/include/svl/itemprop.hxx b/include/svl/itemprop.hxx
index f9f332b816d5..720cfb423ed6 100644
--- a/include/svl/itemprop.hxx
+++ b/include/svl/itemprop.hxx
@@ -149,7 +149,7 @@ public:
         getPropertyState(const SfxItemPropertySimpleEntry& rEntry, const SfxItemSet& rSet) const
                                     throw();
 
-    css::uno::Reference<css::beans::XPropertySetInfo>
+    css::uno::Reference<css::beans::XPropertySetInfo> const &
         getPropertySetInfo() const;
     const SfxItemPropertyMap& getPropertyMap() const {return m_aMap;}
 };
diff --git a/include/svl/style.hxx b/include/svl/style.hxx
index 197c93850ed9..b0acd32534ea 100644
--- a/include/svl/style.hxx
+++ b/include/svl/style.hxx
@@ -112,7 +112,7 @@ public:
 
     /** returns the display name of this style, it is used at the user interface.
         If the display name is empty, this method returns the internal name. */
-    OUString GetDisplayName() const;
+    OUString const & GetDisplayName() const;
 
     virtual const OUString& GetParent() const;
     virtual bool SetParent( const OUString& );
diff --git a/include/svtools/fmtfield.hxx b/include/svtools/fmtfield.hxx
index 5cc8bd3f4230..185581c26645 100644
--- a/include/svtools/fmtfield.hxx
+++ b/include/svtools/fmtfield.hxx
@@ -181,7 +181,7 @@ public:
     //If someone does not care about all the double handling and just wants to print the text formatted.
     //(((The text will be formatted, using the Formatter, and then set)
     void SetTextFormatted(const OUString& rText);
-    OUString  GetTextValue() const;
+    OUString const & GetTextValue() const;
 
     void      SetDefaultText(const OUString& rDefault) { m_sDefaultText = rDefault; }
     const OUString& GetDefaultText() const { return m_sDefaultText; }
diff --git a/include/svx/sdr/contact/viewcontact.hxx b/include/svx/sdr/contact/viewcontact.hxx
index 6f16ff125600..8e1a882b8a7c 100644
--- a/include/svx/sdr/contact/viewcontact.hxx
+++ b/include/svx/sdr/contact/viewcontact.hxx
@@ -122,7 +122,7 @@ public:
 
     // access to the local primitive. This will ensure that the primitive is
     // current in comparing the local one with a fresh created incarnation
-    drawinglayer::primitive2d::Primitive2DContainer getViewIndependentPrimitive2DSequence() const;
+    drawinglayer::primitive2d::Primitive2DContainer const & getViewIndependentPrimitive2DSequence() const;
 
     // add Gluepoints (if available)
     virtual drawinglayer::primitive2d::Primitive2DContainer createGluePointPrimitive2DSequence() const;
diff --git a/include/svx/sdr/contact/viewcontactofe3d.hxx b/include/svx/sdr/contact/viewcontactofe3d.hxx
index 9c31755a3e09..b475d511da50 100644
--- a/include/svx/sdr/contact/viewcontactofe3d.hxx
+++ b/include/svx/sdr/contact/viewcontactofe3d.hxx
@@ -81,7 +81,7 @@ protected:
 public:
     // access to the local primitive without the object's local 3D transform. This is e.g. needed
     // to get the not-yet transformed BoundVolume for e.g. interactions
-    drawinglayer::primitive3d::Primitive3DContainer getVIP3DSWithoutObjectTransform() const;
+    drawinglayer::primitive3d::Primitive3DContainer const & getVIP3DSWithoutObjectTransform() const;
 
     // access to the local primitive. This will ensure that the list is
     // current in comparing the local list content with a fresh created incarnation. It will
diff --git a/include/svx/sdr/contact/viewobjectcontact.hxx b/include/svx/sdr/contact/viewobjectcontact.hxx
index 6936760b8feb..e4253c5185fa 100644
--- a/include/svx/sdr/contact/viewobjectcontact.hxx
+++ b/include/svx/sdr/contact/viewobjectcontact.hxx
@@ -110,7 +110,7 @@ public:
     // access to the local primitive. This will ensure that the local primitive is
     // current in comparing the local one with a fresh created incarnation
     // This method will not handle included hierarchies and not check visibility.
-    drawinglayer::primitive2d::Primitive2DContainer getPrimitive2DSequence(const DisplayInfo& rDisplayInfo) const;
+    drawinglayer::primitive2d::Primitive2DContainer const & getPrimitive2DSequence(const DisplayInfo& rDisplayInfo) const;
 
     // test this VOC for visibility concerning model-view stuff like e.g. Layer
     virtual bool isPrimitiveVisible(const DisplayInfo& rDisplayInfo) const;
diff --git a/include/svx/sdr/overlay/overlaymanager.hxx b/include/svx/sdr/overlay/overlaymanager.hxx
index 64199a2ec550..44cb21978173 100644
--- a/include/svx/sdr/overlay/overlaymanager.hxx
+++ b/include/svx/sdr/overlay/overlaymanager.hxx
@@ -95,7 +95,7 @@ namespace sdr
             static rtl::Reference<OverlayManager> create(OutputDevice& rOutputDevice);
 
             // access to current ViewInformation2D; this call checks and evtl. updates ViewInformation2D
-            const drawinglayer::geometry::ViewInformation2D getCurrentViewInformation2D() const;
+            drawinglayer::geometry::ViewInformation2D const & getCurrentViewInformation2D() const;
 
             // complete redraw
             virtual void completeRedraw(const vcl::Region& rRegion, OutputDevice* pPreRenderDevice = nullptr) const;
diff --git a/include/svx/sdrpaintwindow.hxx b/include/svx/sdrpaintwindow.hxx
index 499bb6530d43..a6ad7a0f9789 100644
--- a/include/svx/sdrpaintwindow.hxx
+++ b/include/svx/sdrpaintwindow.hxx
@@ -100,7 +100,7 @@ public:
     vcl::Window* GetWindow() const { return mpWindow; }
 
     // OVERLAYMANAGER
-    rtl::Reference< sdr::overlay::OverlayManager > GetOverlayManager() const;
+    rtl::Reference< sdr::overlay::OverlayManager > const & GetOverlayManager() const;
 
     // #i73602# add flag if buffer shall be used
     void DrawOverlay(const vcl::Region& rRegion);
diff --git a/include/svx/svdmodel.hxx b/include/svx/svdmodel.hxx
index e86209aaf930..ade835e6bef7 100644
--- a/include/svx/svdmodel.hxx
+++ b/include/svx/svdmodel.hxx
@@ -524,7 +524,7 @@ public:
     bool GetDisableTextEditUsesCommonUndoManager() const { return mbDisableTextEditUsesCommonUndoManager; }
     void SetDisableTextEditUsesCommonUndoManager(bool bNew) { mbDisableTextEditUsesCommonUndoManager = bNew; }
 
-    css::uno::Reference< css::uno::XInterface > getUnoModel();
+    css::uno::Reference< css::uno::XInterface > const & getUnoModel();
     void setUnoModel( const css::uno::Reference< css::uno::XInterface >& xModel );
 
     // these functions are used by the api to disable repaints during a
diff --git a/include/svx/svdoashp.hxx b/include/svx/svdoashp.hxx
index 69cd93f7b1ec..8bf0037c3e87 100644
--- a/include/svx/svdoashp.hxx
+++ b/include/svx/svdoashp.hxx
@@ -107,7 +107,7 @@ public:
     // #i37011# render geometry shadow
     SdrObject*                                          mpLastShadowGeometry;
 
-    css::uno::Reference< css::drawing::XCustomShapeEngine > GetCustomShapeEngine() const;
+    css::uno::Reference< css::drawing::XCustomShapeEngine > const & GetCustomShapeEngine() const;
 
 //  SVX_DLLPRIVATE css::uno::Sequence< css::uno::Reference< css::drawing::XCustomShapeHandle > >
 //      SdrObjCustomShape::GetInteraction( const SdrObjCustomShape* pCustomShape ) const;
diff --git a/include/svx/svdpage.hxx b/include/svx/svdpage.hxx
index 700aa0fc5216..365817b4e865 100644
--- a/include/svx/svdpage.hxx
+++ b/include/svx/svdpage.hxx
@@ -508,7 +508,7 @@ public:
     /// otherwise the visible pages
     virtual const SdrPageGridFrameList* GetGridFrameList(const SdrPageView* pPV, const Rectangle* pRect) const;
 
-    css::uno::Reference< css::uno::XInterface > getUnoPage();
+    css::uno::Reference< css::uno::XInterface > const & getUnoPage();
 
     virtual SfxStyleSheet* GetTextStyleSheetForObject( SdrObject* pObj ) const;
 
diff --git a/include/svx/textchain.hxx b/include/svx/textchain.hxx
index 5416c90a3ecb..8c0c6a3b59e6 100644
--- a/include/svx/textchain.hxx
+++ b/include/svx/textchain.hxx
@@ -53,11 +53,11 @@
     a##PropName = (PropDefault);
 
 #define DECL_CHAIN_PROP_INTERFACE(PropName, PropType) \
-    PropType Get##PropName (const SdrTextObj *); \
+    PropType const & Get##PropName (const SdrTextObj *); \
     void Set##PropName (const SdrTextObj *, PropType);
 
 #define IMPL_CHAIN_PROP_INTERFACE(PropName, PropType) \
-    PropType TextChain::Get##PropName (const SdrTextObj *pTarget) { \
+    PropType const & TextChain::Get##PropName (const SdrTextObj *pTarget) { \
         ImpChainLinkProperties *pLinkProperties = GetLinkProperties(pTarget); \
         return pLinkProperties->a##PropName; \
     } \
diff --git a/include/svx/xmleohlp.hxx b/include/svx/xmleohlp.hxx
index 3b4226503d39..bd8cb9bd55d2 100644
--- a/include/svx/xmleohlp.hxx
+++ b/include/svx/xmleohlp.hxx
@@ -72,7 +72,7 @@ private:
                                        bool *pGraphicRepl=nullptr,
                                        bool *pOasisFormat=nullptr ) const;
 
-    SVX_DLLPRIVATE css::uno::Reference < css::embed::XStorage > ImplGetContainerStorage(
+    SVX_DLLPRIVATE css::uno::Reference < css::embed::XStorage > const & ImplGetContainerStorage(
                                     const OUString& rStorageName );
 
     SVX_DLLPRIVATE void                 ImplReadObject(
diff --git a/include/svx/xtable.hxx b/include/svx/xtable.hxx
index a692f39e36ba..c55827e97cb0 100644
--- a/include/svx/xtable.hxx
+++ b/include/svx/xtable.hxx
@@ -321,12 +321,12 @@ public:
     // Special call to get a bitmap for the solid line representation. It
     // creates a bitmap fitting in size and style to the ones you get by
     // using GetUiBitmap for existing entries.
-    Bitmap GetBitmapForUISolidLine() const;
+    Bitmap const & GetBitmapForUISolidLine() const;
 
     // Special calls to get the translated strings for the UI entry for no
     // line style (XLINE_NONE) and solid line style (XLINE_SOLID) for dialogs
-    OUString GetStringForUiSolidLine() const;
-    OUString GetStringForUiNoLine() const;
+    OUString const & GetStringForUiSolidLine() const;
+    OUString const & GetStringForUiNoLine() const;
 };
 
 class SVX_DLLPUBLIC XHatchList : public XPropertyList
diff --git a/include/toolkit/awt/vclxprinter.hxx b/include/toolkit/awt/vclxprinter.hxx
index e89613c0cd61..4fe541f15833 100644
--- a/include/toolkit/awt/vclxprinter.hxx
+++ b/include/toolkit/awt/vclxprinter.hxx
@@ -67,7 +67,7 @@ public:
     virtual ~VCLXPrinterPropertySet();
 
     Printer*                    GetPrinter() const { return mxPrinter.get(); }
-    css::uno::Reference< css::awt::XDevice >  GetDevice();
+    css::uno::Reference< css::awt::XDevice > const &  GetDevice();
 
     // css::uno::XInterface
     DECLARE_XINTERFACE();
diff --git a/include/ucbhelper/interactionrequest.hxx b/include/ucbhelper/interactionrequest.hxx
index ada7a1cf79dc..8d8f2c9191bf 100644
--- a/include/ucbhelper/interactionrequest.hxx
+++ b/include/ucbhelper/interactionrequest.hxx
@@ -122,7 +122,7 @@ public:
       * @return the continuation chosen by an interaction handler or an empty
       *         reference, if the request was not (yet) handled.
       */
-    rtl::Reference< InteractionContinuation > getSelection() const;
+    rtl::Reference< InteractionContinuation > const & getSelection() const;
 
     /**
       * This method sets a continuation for the request. It also can be used
diff --git a/include/unotools/lingucfg.hxx b/include/unotools/lingucfg.hxx
index 0f9acb9af6b4..294777955007 100644
--- a/include/unotools/lingucfg.hxx
+++ b/include/unotools/lingucfg.hxx
@@ -147,7 +147,7 @@ class UNOTOOLS_DLLPUBLIC SvtLinguConfig: public utl::detail::Options
     // configuration update access for the 'Linguistic' main node
     mutable css::uno::Reference< css::util::XChangesBatch > m_xMainUpdateAccess;
 
-    css::uno::Reference< css::util::XChangesBatch > GetMainUpdateAccess() const;
+    css::uno::Reference< css::util::XChangesBatch > const & GetMainUpdateAccess() const;
 
     OUString GetVendorImageUrl_Impl( const OUString &rServiceImplName, const OUString &rImageName ) const;
 
diff --git a/include/unotools/localedatawrapper.hxx b/include/unotools/localedatawrapper.hxx
index 419ac1517508..c63e8fc93553 100644
--- a/include/unotools/localedatawrapper.hxx
+++ b/include/unotools/localedatawrapper.hxx
@@ -175,7 +175,7 @@ public:
     MeasurementSystem   mapMeasurementStringToEnum( const OUString& rMS ) const;
 
     /// Convenience method to obtain the default calendar.
-    const std::shared_ptr< css::i18n::Calendar2 > getDefaultCalendar() const;
+    const std::shared_ptr< css::i18n::Calendar2 >& getDefaultCalendar() const;
 
     /// Convenience method to obtain the day names of the default calendar.
     const css::uno::Sequence< css::i18n::CalendarItem2 > getDefaultCalendarDays() const;
diff --git a/include/vbahelper/vbahelper.hxx b/include/vbahelper/vbahelper.hxx
index d78932e1e583..d39ced5bbdbb 100644
--- a/include/vbahelper/vbahelper.hxx
+++ b/include/vbahelper/vbahelper.hxx
@@ -81,7 +81,7 @@ namespace ooo
         VBAHELPER_DLLPUBLIC css::uno::Reference< css::frame::XModel > getCurrentWordDoc( const css::uno::Reference< css::uno::XComponentContext >& xContext ) throw (css::uno::RuntimeException);
 
         VBAHELPER_DLLPUBLIC css::uno::Reference< css::beans::XIntrospectionAccess > getIntrospectionAccess( const css::uno::Any& aObject ) throw (css::uno::RuntimeException);
-        VBAHELPER_DLLPUBLIC css::uno::Reference< css::script::XTypeConverter > getTypeConverter( const css::uno::Reference< css::uno::XComponentContext >& xContext ) throw (css::uno::RuntimeException);
+        VBAHELPER_DLLPUBLIC css::uno::Reference< css::script::XTypeConverter > const & getTypeConverter( const css::uno::Reference< css::uno::XComponentContext >& xContext ) throw (css::uno::RuntimeException);
 
         VBAHELPER_DLLPUBLIC void dispatchRequests( const css::uno::Reference< css::frame::XModel>& xModel, const OUString& aUrl );
         VBAHELPER_DLLPUBLIC void dispatchRequests (const css::uno::Reference< css::frame::XModel>& xModel, const OUString & aUrl, const css::uno::Sequence< css::beans::PropertyValue >& sProps );
diff --git a/include/vbahelper/vbashaperange.hxx b/include/vbahelper/vbashaperange.hxx
index ee9ec7c646f0..2e6936020b05 100644
--- a/include/vbahelper/vbashaperange.hxx
+++ b/include/vbahelper/vbashaperange.hxx
@@ -60,7 +60,7 @@ protected:
     css::uno::Reference< css::frame::XModel > m_xModel;
     virtual OUString getServiceImplName() override;
     virtual css::uno::Sequence<OUString> getServiceNames() override;
-    css::uno::Reference< css::drawing::XShapes > getShapes() throw (css::uno::RuntimeException) ;
+    css::uno::Reference< css::drawing::XShapes > const & getShapes() throw (css::uno::RuntimeException) ;
 public:
     ScVbaShapeRange( const css::uno::Reference< ov::XHelperInterface >& xParent, const css::uno::Reference< css::uno::XComponentContext >& xContext, const css::uno::Reference< css::container::XIndexAccess >& xShapes, const css::uno::Reference< css::drawing::XDrawPage>& xDrawShape, const css::uno::Reference< css::frame::XModel >& xModel );
 
diff --git a/include/vcl/commandinfoprovider.hxx b/include/vcl/commandinfoprovider.hxx
index 2560745c9d58..4f76dbe1af7f 100644
--- a/include/vcl/commandinfoprovider.hxx
+++ b/include/vcl/commandinfoprovider.hxx
@@ -119,10 +119,10 @@ public:
     CommandInfoProvider();
     ~CommandInfoProvider();
 
-    css::uno::Reference<css::ui::XAcceleratorConfiguration> GetDocumentAcceleratorConfiguration();
-    css::uno::Reference<css::ui::XAcceleratorConfiguration> GetModuleAcceleratorConfiguration();
-    css::uno::Reference<css::ui::XAcceleratorConfiguration> GetGlobalAcceleratorConfiguration();
-    OUString GetModuleIdentifier();
+    css::uno::Reference<css::ui::XAcceleratorConfiguration> const & GetDocumentAcceleratorConfiguration();
+    css::uno::Reference<css::ui::XAcceleratorConfiguration> const & GetModuleAcceleratorConfiguration();
+    css::uno::Reference<css::ui::XAcceleratorConfiguration> const & GetGlobalAcceleratorConfiguration();
+    OUString const & GetModuleIdentifier();
     css::uno::Sequence<css::beans::PropertyValue> GetCommandProperties (
         const OUString& rsCommandName);
     OUString GetCommandProperty(const OUString& rsProperty, const OUString& rsCommandName);
diff --git a/include/vcl/edit.hxx b/include/vcl/edit.hxx
index c78ea3ad18c3..28c29af61c9e 100644
--- a/include/vcl/edit.hxx
+++ b/include/vcl/edit.hxx
@@ -123,7 +123,7 @@ private:
     SAL_DLLPRIVATE void        ImplCopy(css::uno::Reference<css::datatransfer::clipboard::XClipboard>& rxClipboard);
     SAL_DLLPRIVATE void        ImplPaste(css::uno::Reference<css::datatransfer::clipboard::XClipboard>& rxClipboard);
     SAL_DLLPRIVATE long        ImplGetTextYPosition() const;
-    SAL_DLLPRIVATE css::uno::Reference<css::i18n::XExtendedInputSequenceChecker > ImplGetInputSequenceChecker();
+    SAL_DLLPRIVATE css::uno::Reference<css::i18n::XExtendedInputSequenceChecker > const & ImplGetInputSequenceChecker();
     SAL_DLLPRIVATE css::uno::Reference<css::i18n::XBreakIterator > ImplGetBreakIterator() const;
     SAL_DLLPRIVATE void        filterText();
 
diff --git a/include/vcl/helper.hxx b/include/vcl/helper.hxx
index dcdcd923ba18..cbefea363676 100644
--- a/include/vcl/helper.hxx
+++ b/include/vcl/helper.hxx
@@ -40,7 +40,7 @@ void VCL_DLLPUBLIC getPrinterPathList( std::list< OUString >& rPathList, const c
 
 // note: gcc 3.4.1 warns about visibility if we retunr a const OUString& here
 // seems to be a bug in gcc, now we return an object instead of a reference
-OUString VCL_DLLPUBLIC getFontPath();
+VCL_DLLPUBLIC OUString const & getFontPath();
 
 bool VCL_DLLPUBLIC convertPfbToPfa( osl::File& rInFile, osl::File& rOutFile );
 
@@ -54,7 +54,7 @@ void VCL_DLLPUBLIC splitPath( OString& rOrgPath, OString& rDir, OString& rBase )
 enum class whichOfficePath { InstallationRootPath, UserPath, ConfigPath };
 // note: gcc 3.4.1 warns about visibility if we retunr a const OUString& here
 // seems to be a bug in gcc, now we return an object instead of a reference
-OUString VCL_DLLPUBLIC getOfficePath( whichOfficePath ePath );
+VCL_DLLPUBLIC OUString const & getOfficePath( whichOfficePath ePath );
 
 } // namespace
 
diff --git a/include/vcl/layout.hxx b/include/vcl/layout.hxx
index 59d7d6c6ae45..02fcaad564e9 100644
--- a/include/vcl/layout.hxx
+++ b/include/vcl/layout.hxx
@@ -665,8 +665,8 @@ public:
     virtual short Execute() override;
     ///Emitted when an action widget is clicked
     virtual void response(short nResponseId);
-    OUString get_primary_text() const;
-    OUString get_secondary_text() const;
+    OUString const & get_primary_text() const;
+    OUString const & get_secondary_text() const;
     void set_primary_text(const OUString &rPrimaryString);
     void set_secondary_text(const OUString &rSecondaryString);
     virtual ~MessageDialog();
diff --git a/include/vcl/longcurr.hxx b/include/vcl/longcurr.hxx
index 7c03c0fd190a..011237c6d8ef 100644
--- a/include/vcl/longcurr.hxx
+++ b/include/vcl/longcurr.hxx
@@ -55,7 +55,7 @@ public:
     bool                    IsUseThousandSep() const { return mbThousandSep; }
 
     void                    SetCurrencySymbol( const OUString& rStr );
-    OUString                GetCurrencySymbol() const;
+    OUString const &        GetCurrencySymbol() const;
 
     void                    SetMin(const BigInt& rNewMin);
     const BigInt&           GetMin() const { return mnMin; }
diff --git a/include/vcl/mnemonic.hxx b/include/vcl/mnemonic.hxx
index 9822db32b458..9d5fa1944e27 100644
--- a/include/vcl/mnemonic.hxx
+++ b/include/vcl/mnemonic.hxx
@@ -65,7 +65,7 @@ public:
 
     void                RegisterMnemonic( const OUString& rKey );
     OUString            CreateMnemonic( const OUString& rKey );
-    css::uno::Reference< css::i18n::XCharacterClassification > GetCharClass();
+    css::uno::Reference< css::i18n::XCharacterClassification > const & GetCharClass();
 
     // returns a string where all '~'-characters and CJK mnemonics of the form (~A) are completely removed
     static OUString EraseAllMnemonicChars( const OUString& rStr );
diff --git a/include/vcl/tabctrl.hxx b/include/vcl/tabctrl.hxx
index 5b26c830ecac..e162b19f6681 100644
--- a/include/vcl/tabctrl.hxx
+++ b/include/vcl/tabctrl.hxx
@@ -141,7 +141,7 @@ public:
     TabPage*            GetTabPage( sal_uInt16 nPageId ) const;
 
     void                SetPageText( sal_uInt16 nPageId, const OUString& rText );
-    OUString            GetPageText( sal_uInt16 nPageId ) const;
+    OUString const &    GetPageText( sal_uInt16 nPageId ) const;
 
     void                SetHelpText( sal_uInt16 nPageId, const OUString& rText );
     const OUString&     GetHelpText( sal_uInt16 nPageId ) const;
diff --git a/include/vcl/texteng.hxx b/include/vcl/texteng.hxx
index 5f2fda1a701f..400d08060264 100644
--- a/include/vcl/texteng.hxx
+++ b/include/vcl/texteng.hxx
@@ -159,7 +159,7 @@ protected:
     // gets not exported. First and second parameter swapped to have a different signatur.
     SAL_DLLPRIVATE TextPaM  ImpInsertText( sal_Unicode c, const TextSelection& rSel, bool bOverwrite = false, bool bIsUserInput = false );
     // some other new functions needed that must not be exported to remain compatible
-    SAL_DLLPRIVATE css::uno::Reference < css::i18n::XExtendedInputSequenceChecker > GetInputSequenceChecker();
+    SAL_DLLPRIVATE css::uno::Reference< css::i18n::XExtendedInputSequenceChecker > const & GetInputSequenceChecker();
     SAL_DLLPRIVATE bool IsInputSequenceCheckingRequired( sal_Unicode c, const TextSelection& rCurSel ) const;
 
     // broadcast or adjust selections
@@ -306,8 +306,8 @@ public:
     void                Draw( OutputDevice* pDev, const Point& rPos );
 
     void                SetLocale( const css::lang::Locale& rLocale );
-    css::lang::Locale   GetLocale();
-    css::uno::Reference< css::i18n::XBreakIterator > GetBreakIterator();
+    css::lang::Locale const & GetLocale();
+    css::uno::Reference< css::i18n::XBreakIterator > const & GetBreakIterator();
 
     static bool         DoesKeyChangeText( const KeyEvent& rKeyEvent );
     static bool         IsSimpleCharInput( const KeyEvent& rKeyEvent );
diff --git a/include/xmloff/xmlexp.hxx b/include/xmloff/xmlexp.hxx
index 48aebd413bfc..6ba10d56828e 100644
--- a/include/xmloff/xmlexp.hxx
+++ b/include/xmloff/xmlexp.hxx
@@ -425,27 +425,27 @@ public:
     }
 
     // get export helper for text
-    inline rtl::Reference< XMLTextParagraphExport > GetTextParagraphExport();
+    inline rtl::Reference< XMLTextParagraphExport > const & GetTextParagraphExport();
 
     // get export helper for shapes
-    inline rtl::Reference< XMLShapeExport > GetShapeExport();
+    inline rtl::Reference< XMLShapeExport > const & GetShapeExport();
 
     // get auto style pool
-    inline rtl::Reference< SvXMLAutoStylePoolP > GetAutoStylePool();
+    inline rtl::Reference< SvXMLAutoStylePoolP > const & GetAutoStylePool();
 
     // get Page Export
-    inline rtl::Reference< XMLPageExport > GetPageExport();
+    inline rtl::Reference< XMLPageExport > const & GetPageExport();
 
     // get chart export helper
-    inline rtl::Reference< SchXMLExportHelper > GetChartExport();
+    inline rtl::Reference< SchXMLExportHelper > const & GetChartExport();
 
     // get font auto style pool
-    inline rtl::Reference< XMLFontAutoStylePool > GetFontAutoStylePool();
+    inline rtl::Reference< XMLFontAutoStylePool > const & GetFontAutoStylePool();
 
     ProgressBarHelper*  GetProgressBarHelper();
 
     // get Formlayer Export
-    inline rtl::Reference< xmloff::OFormLayerXMLExport > GetFormExport();
+    inline rtl::Reference< xmloff::OFormLayerXMLExport > const & GetFormExport();
     inline bool HasFormExport();
 
     // get XPropertySet with export information
@@ -564,7 +564,7 @@ public:
     bool SetNullDateOnUnitConverter();
 };
 
-inline rtl::Reference< XMLTextParagraphExport > SvXMLExport::GetTextParagraphExport()
+inline rtl::Reference< XMLTextParagraphExport > const & SvXMLExport::GetTextParagraphExport()
 {
     if( !mxTextParagraphExport.is() )
         mxTextParagraphExport = CreateTextParagraphExport();
@@ -572,7 +572,7 @@ inline rtl::Reference< XMLTextParagraphExport > SvXMLExport::GetTextParagraphExp
     return mxTextParagraphExport;
 }
 
-inline rtl::Reference< XMLShapeExport > SvXMLExport::GetShapeExport()
+inline rtl::Reference< XMLShapeExport > const & SvXMLExport::GetShapeExport()
 {
     if( !mxShapeExport.is() )
         mxShapeExport = CreateShapeExport();
@@ -580,7 +580,7 @@ inline rtl::Reference< XMLShapeExport > SvXMLExport::GetShapeExport()
     return mxShapeExport;
 }
 
-inline rtl::Reference< SvXMLAutoStylePoolP > SvXMLExport::GetAutoStylePool()
+inline rtl::Reference< SvXMLAutoStylePoolP > const & SvXMLExport::GetAutoStylePool()
 {
     if( !mxAutoStylePool.is() )
         mxAutoStylePool = CreateAutoStylePool();
@@ -588,7 +588,7 @@ inline rtl::Reference< SvXMLAutoStylePoolP > SvXMLExport::GetAutoStylePool()
     return mxAutoStylePool;
 }
 
-inline rtl::Reference< SchXMLExportHelper > SvXMLExport::GetChartExport()
+inline rtl::Reference< SchXMLExportHelper > const & SvXMLExport::GetChartExport()
 {
     if( !mxChartExport.is() )
         mxChartExport = CreateChartExport();
@@ -596,7 +596,7 @@ inline rtl::Reference< SchXMLExportHelper > SvXMLExport::GetChartExport()
     return mxChartExport;
 }
 
-inline rtl::Reference< XMLPageExport > SvXMLExport::GetPageExport()
+inline rtl::Reference< XMLPageExport > const & SvXMLExport::GetPageExport()
 {
     if( !mxPageExport.is() )
         mxPageExport = CreatePageExport();
@@ -604,7 +604,7 @@ inline rtl::Reference< XMLPageExport > SvXMLExport::GetPageExport()
     return mxPageExport;
 }
 
-inline rtl::Reference< XMLFontAutoStylePool > SvXMLExport::GetFontAutoStylePool()
+inline rtl::Reference< XMLFontAutoStylePool > const & SvXMLExport::GetFontAutoStylePool()
 {
     if( !mxFontAutoStylePool.is() )
         mxFontAutoStylePool = CreateFontAutoStylePool();
@@ -612,7 +612,7 @@ inline rtl::Reference< XMLFontAutoStylePool > SvXMLExport::GetFontAutoStylePool(
     return mxFontAutoStylePool;
 }
 
-inline rtl::Reference< xmloff::OFormLayerXMLExport > SvXMLExport::GetFormExport()
+inline rtl::Reference< xmloff::OFormLayerXMLExport > const & SvXMLExport::GetFormExport()
 {
     if( !mxFormExport.is() )
         mxFormExport = CreateFormExport();
diff --git a/include/xmloff/xmlimp.hxx b/include/xmloff/xmlimp.hxx
index 7827177518fc..97bbf6ce8eca 100644
--- a/include/xmloff/xmlimp.hxx
+++ b/include/xmloff/xmlimp.hxx
@@ -296,18 +296,18 @@ public:
     virtual void SetStatistics(const css::uno::Sequence< css::beans::NamedValue > & i_rStats);
 
     // get import helper for text
-    inline rtl::Reference< XMLTextImportHelper > GetTextImport();
+    inline rtl::Reference< XMLTextImportHelper > const & GetTextImport();
     bool HasTextImport() const { return mxTextImport.is(); }
     inline SvXMLNumFmtHelper* GetDataStylesImport();
 
     // get import helper for shapes
-    inline rtl::Reference< XMLShapeImportHelper > GetShapeImport();
+    inline rtl::Reference< XMLShapeImportHelper > const & GetShapeImport();
 
     // get import helper for charts
-    inline rtl::Reference< SchXMLImportHelper > GetChartImport();
+    inline rtl::Reference< SchXMLImportHelper > const & GetChartImport();
 
     // get import helper for form layer
-    inline rtl::Reference< ::xmloff::OFormLayerXMLImport > GetFormImport();
+    inline rtl::Reference< ::xmloff::OFormLayerXMLImport > const & GetFormImport();
 
     // get XPropertySet with import information
     const css::uno::Reference< css::beans::XPropertySet >& getImportInfo() const { return mxImportInfo; }
@@ -520,7 +520,7 @@ public:
     bool needFixPositionAfterZ() const;
 };
 
-inline rtl::Reference< XMLTextImportHelper > SvXMLImport::GetTextImport()
+inline rtl::Reference< XMLTextImportHelper > const & SvXMLImport::GetTextImport()
 {
     if( !mxTextImport.is() )
         mxTextImport = CreateTextImport();
@@ -528,7 +528,7 @@ inline rtl::Reference< XMLTextImportHelper > SvXMLImport::GetTextImport()
     return mxTextImport;
 }
 
-inline rtl::Reference< XMLShapeImportHelper > SvXMLImport::GetShapeImport()
+inline rtl::Reference< XMLShapeImportHelper > const & SvXMLImport::GetShapeImport()
 {
     if( !mxShapeImport.is() )
         mxShapeImport = CreateShapeImport();
@@ -536,7 +536,7 @@ inline rtl::Reference< XMLShapeImportHelper > SvXMLImport::GetShapeImport()
     return mxShapeImport;
 }
 
-inline rtl::Reference< SchXMLImportHelper > SvXMLImport::GetChartImport()
+inline rtl::Reference< SchXMLImportHelper > const & SvXMLImport::GetChartImport()
 {
     if( !mxChartImport.is() )
         mxChartImport = CreateChartImport();
@@ -544,7 +544,7 @@ inline rtl::Reference< SchXMLImportHelper > SvXMLImport::GetChartImport()
     return mxChartImport;
 }
 
-inline rtl::Reference< ::xmloff::OFormLayerXMLImport > SvXMLImport::GetFormImport()
+inline rtl::Reference< ::xmloff::OFormLayerXMLImport > const & SvXMLImport::GetFormImport()
 {
     if( !mxFormImport.is() )
         mxFormImport = CreateFormImport();
diff --git a/l10ntools/inc/export.hxx b/l10ntools/inc/export.hxx
index de210396b075..4984800b8a50 100644
--- a/l10ntools/inc/export.hxx
+++ b/l10ntools/inc/export.hxx
@@ -257,7 +257,7 @@ class MergeDataHashMap
         typedef HashMap_t::const_iterator const_iterator;
 
         std::pair<iterator,bool> insert(const OString& rKey, MergeData* pMergeData);
-        iterator find(const OString& rKey);
+        iterator const & find(const OString& rKey);
 
         iterator begin() {return m_aHashMap.begin();}
         iterator end() {return m_aHashMap.end();}
diff --git a/l10ntools/inc/po.hxx b/l10ntools/inc/po.hxx
index 3004a1817cf3..ff8567e8db19 100644
--- a/l10ntools/inc/po.hxx
+++ b/l10ntools/inc/po.hxx
@@ -52,13 +52,13 @@ public:
                     PoEntry( const PoEntry& rPo );
     PoEntry&        operator=( const PoEntry& rPo );
 
-    OString         getSourceFile() const;      ///< Get name of file from which entry is extracted
+    OString const &  getSourceFile() const;      ///< Get name of file from which entry is extracted
     OString         getGroupId() const;
     OString         getLocalId() const;
     OString         getResourceType() const;    ///< Get the type of component from which entry is extracted
     TYPE            getType() const;            ///< Get the type of entry
-    OString         getMsgId() const;
-    OString         getMsgStr() const;
+    OString const & getMsgId() const;
+    OString const & getMsgStr() const;
     bool            isFuzzy() const;
 
     /// Check whether po-s belong to the same localization component
diff --git a/l10ntools/source/merge.cxx b/l10ntools/source/merge.cxx
index 133f8f3f8c57..f927420fb30d 100644
--- a/l10ntools/source/merge.cxx
+++ b/l10ntools/source/merge.cxx
@@ -160,7 +160,7 @@ std::pair<MergeDataHashMap::iterator,bool> MergeDataHashMap::insert(const OStrin
     return aTemp;
 }
 
-MergeDataHashMap::iterator MergeDataHashMap::find(const OString& rKey)
+MergeDataHashMap::iterator const & MergeDataHashMap::find(const OString& rKey)
 {
     iterator aHint = m_aHashMap.end();
 
diff --git a/l10ntools/source/po.cxx b/l10ntools/source/po.cxx
index 4662d58e0567..f446a2f31672 100644
--- a/l10ntools/source/po.cxx
+++ b/l10ntools/source/po.cxx
@@ -289,7 +289,7 @@ PoEntry& PoEntry::operator=(const PoEntry& rPo)
     return *this;
 }
 
-OString PoEntry::getSourceFile() const
+OString const & PoEntry::getSourceFile() const
 {
     assert( m_bIsInitialized );
     return m_pGenPo->getReference();
@@ -343,14 +343,14 @@ bool PoEntry::isFuzzy() const
 }
 
 // Get translation string in merge format
-OString PoEntry::getMsgId() const
+OString const & PoEntry::getMsgId() const
 {
     assert( m_bIsInitialized );
     return m_pGenPo->getMsgId();
 }
 
 // Get translated string in merge format
-OString PoEntry::getMsgStr() const
+const OString& PoEntry::getMsgStr() const
 {
     assert( m_bIsInitialized );
     return m_pGenPo->getMsgStr();
diff --git a/linguistic/source/gciterator.cxx b/linguistic/source/gciterator.cxx
index b15fa85258ff..e076fa6dc3e8 100644
--- a/linguistic/source/gciterator.cxx
+++ b/linguistic/source/gciterator.cxx
@@ -988,7 +988,7 @@ throw (uno::RuntimeException, std::exception)
 }
 
 
-uno::Reference< util::XChangesBatch > GrammarCheckingIterator::GetUpdateAccess() const
+uno::Reference< util::XChangesBatch > const & GrammarCheckingIterator::GetUpdateAccess() const
 {
     if (!m_xUpdateAccess.is())
     {
diff --git a/linguistic/source/gciterator.hxx b/linguistic/source/gciterator.hxx
index 36e5f098a2c8..aa6b85967750 100644
--- a/linguistic/source/gciterator.hxx
+++ b/linguistic/source/gciterator.hxx
@@ -136,7 +136,7 @@ class GrammarCheckingIterator:
     void GetConfiguredGCSvcs_Impl();
     css::uno::Reference< css::linguistic2::XProofreader > GetGrammarChecker( const css::lang::Locale & rLocale );
 
-    css::uno::Reference< css::util::XChangesBatch >   GetUpdateAccess() const;
+    css::uno::Reference< css::util::XChangesBatch > const & GetUpdateAccess() const;
 
     GrammarCheckingIterator( const GrammarCheckingIterator & ) = delete;
     GrammarCheckingIterator & operator = ( const GrammarCheckingIterator & ) = delete;
diff --git a/lotuswordpro/source/filter/lwpcelllayout.cxx b/lotuswordpro/source/filter/lwpcelllayout.cxx
index eb3d0cdc9f03..087566c698c4 100644
--- a/lotuswordpro/source/filter/lwpcelllayout.cxx
+++ b/lotuswordpro/source/filter/lwpcelllayout.cxx
@@ -297,7 +297,7 @@ void LwpCellLayout::ApplyFmtStyle(XFCellStyle *pCellStyle)
  * @param   nCol - default cell position col number
  * @return  OUString - registered cell style name
  */
-OUString LwpCellLayout::GetCellStyleName(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout)
+OUString const & LwpCellLayout::GetCellStyleName(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout)
 {
     // judge cell border type
     LwpCellBorderType eType = GetCellBorderType(nRow, nCol, pTableLayout);
diff --git a/lotuswordpro/source/filter/lwpcelllayout.hxx b/lotuswordpro/source/filter/lwpcelllayout.hxx
index 18a1bb833e78..7e4b7cc29f55 100644
--- a/lotuswordpro/source/filter/lwpcelllayout.hxx
+++ b/lotuswordpro/source/filter/lwpcelllayout.hxx
@@ -111,7 +111,7 @@ protected:
     void ApplyWatermark(XFCellStyle* pCellStyle);
     void ApplyProtect(XFCell * pCell, LwpObjectID aTableID);
     void ApplyFmtStyle(XFCellStyle *pCellStyle);
-    OUString GetCellStyleName(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout);
+    OUString const & GetCellStyleName(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout);
     void RegisterDefaultCell();
     virtual LwpCellBorderType GetCellBorderType(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout);
     static LwpCellLayout * GetCellByRowCol(sal_uInt16 nRow, sal_uInt16 nCol, LwpTableLayout * pTableLayout);
diff --git a/lotuswordpro/source/filter/lwppara.hxx b/lotuswordpro/source/filter/lwppara.hxx
index dfa479716852..59b479933094 100644
--- a/lotuswordpro/source/filter/lwppara.hxx
+++ b/lotuswordpro/source/filter/lwppara.hxx
@@ -176,7 +176,7 @@ public:
     void SetBulletFlag(bool bFlag);
     void SetIndent(LwpIndentOverride* pIndentOverride);
     void SetFirstFrib(const OUString& Content,sal_uInt32 FontID);
-    OUString GetContentText(bool bAllText = false);
+    OUString const & GetContentText(bool bAllText = false);
 
     void SetParaDropcap(bool bFlag);
     void SetDropcapLines(sal_uInt16 number);
diff --git a/lotuswordpro/source/filter/lwppara1.cxx b/lotuswordpro/source/filter/lwppara1.cxx
index 8c015fc8b797..7499af4d3514 100644
--- a/lotuswordpro/source/filter/lwppara1.cxx
+++ b/lotuswordpro/source/filter/lwppara1.cxx
@@ -108,7 +108,7 @@ using boost::polymorphic_downcast;
 /**
  * @short   get text of paragraph
  */
-OUString LwpPara::GetContentText(bool bAllText)
+OUString const & LwpPara::GetContentText(bool bAllText)
 {
 //  rFont = m_FontID;
     if (bAllText)
diff --git a/oox/source/drawingml/shape.cxx b/oox/source/drawingml/shape.cxx
index fe96550bb0f3..55e429178e1b 100644
--- a/oox/source/drawingml/shape.cxx
+++ b/oox/source/drawingml/shape.cxx
@@ -171,7 +171,7 @@ Shape::~Shape()
 {
 }
 
-table::TablePropertiesPtr Shape::getTableProperties()
+table::TablePropertiesPtr const & Shape::getTableProperties()
 {
     if ( !mpTablePropertiesPtr.get() )
         mpTablePropertiesPtr.reset( new table::TableProperties() );
@@ -398,7 +398,7 @@ void Shape::addChildren(
     }
 }
 
-Reference< XShape > Shape::createAndInsert(
+Reference< XShape > const & Shape::createAndInsert(
         ::oox::core::XmlFilterBase& rFilterBase,
         const OUString& rServiceName,
         const Theme* pTheme,
diff --git a/oox/source/ole/axcontrol.cxx b/oox/source/ole/axcontrol.cxx
index 25f505b8dacf..1455d5d51ff9 100644
--- a/oox/source/ole/axcontrol.cxx
+++ b/oox/source/ole/axcontrol.cxx
@@ -2711,7 +2711,7 @@ Reference< XControlModel > EmbeddedForm::convertAndInsert( const EmbeddedControl
     return xRet;
 }
 
-Reference< XIndexContainer > EmbeddedForm::createXForm()
+Reference< XIndexContainer > const & EmbeddedForm::createXForm()
 {
     if( mxFormsSupp.is() )
     {
diff --git a/oox/source/ole/vbaproject.cxx b/oox/source/ole/vbaproject.cxx
index 7aa47ce8c4f7..0642a8a5324e 100644
--- a/oox/source/ole/vbaproject.cxx
+++ b/oox/source/ole/vbaproject.cxx
@@ -235,14 +235,14 @@ Reference< XNameContainer > VbaProject::openLibrary( sal_Int32 nPropId, bool bCr
     return xLibrary;
 }
 
-Reference< XNameContainer > VbaProject::createBasicLibrary()
+Reference< XNameContainer > const & VbaProject::createBasicLibrary()
 {
     if( !mxBasicLib.is() )
         mxBasicLib = openLibrary( PROP_BasicLibraries, true );
     return mxBasicLib;
 }
 
-Reference< XNameContainer > VbaProject::createDialogLibrary()
+Reference< XNameContainer > const & VbaProject::createDialogLibrary()
 {
     if( !mxDialogLib.is() )
         mxDialogLib = openLibrary( PROP_DialogLibraries, true );
diff --git a/oox/source/shape/ShapeContextHandler.cxx b/oox/source/shape/ShapeContextHandler.cxx
index cf7273768794..44262e93488a 100644
--- a/oox/source/shape/ShapeContextHandler.cxx
+++ b/oox/source/shape/ShapeContextHandler.cxx
@@ -78,7 +78,7 @@ ShapeContextHandler::~ShapeContextHandler()
 {
 }
 
-uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getLockedCanvasContext(sal_Int32 nElement)
+uno::Reference<xml::sax::XFastContextHandler> const & ShapeContextHandler::getLockedCanvasContext(sal_Int32 nElement)
 {
     if (!mxLockedCanvasContext.is())
     {
@@ -101,7 +101,7 @@ uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getLockedCanv
 /*
  * This method creates new ChartGraphicDataContext Object.
  */
-uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getChartShapeContext(sal_Int32 nElement)
+uno::Reference<xml::sax::XFastContextHandler> const & ShapeContextHandler::getChartShapeContext(sal_Int32 nElement)
 {
     if (!mxChartShapeContext.is())
     {
@@ -123,7 +123,7 @@ uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getChartShape
     return mxChartShapeContext;
 }
 
-uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getWpsContext(sal_Int32 nStartElement, sal_Int32 nElement)
+uno::Reference<xml::sax::XFastContextHandler> const & ShapeContextHandler::getWpsContext(sal_Int32 nStartElement, sal_Int32 nElement)
 {
     if (!mxWpsContext.is())
     {
@@ -149,7 +149,7 @@ uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getWpsContext
     return mxWpsContext;
 }
 
-uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getWpgContext(sal_Int32 nElement)
+uno::Reference<xml::sax::XFastContextHandler> const & ShapeContextHandler::getWpgContext(sal_Int32 nElement)
 {
     if (!mxWpgContext.is())
     {
@@ -169,7 +169,7 @@ uno::Reference<xml::sax::XFastContextHandler> ShapeContextHandler::getWpgContext
     return mxWpgContext;
 }
 
-uno::Reference<xml::sax::XFastContextHandler>
+uno::Reference<xml::sax::XFastContextHandler> const &
 ShapeContextHandler::getGraphicShapeContext(::sal_Int32 Element )
 {
     if (! mxGraphicShapeContext.is())
@@ -198,7 +198,7 @@ ShapeContextHandler::getGraphicShapeContext(::sal_Int32 Element )
     return mxGraphicShapeContext;
 }
 
-uno::Reference<xml::sax::XFastContextHandler>
+uno::Reference<xml::sax::XFastContextHandler> const &
 ShapeContextHandler::getDrawingShapeContext()
 {
     if (!mxDrawingFragmentHandler.is())
@@ -225,7 +225,7 @@ ShapeContextHandler::getDrawingShapeContext()
     return mxDrawingFragmentHandler;
 }
 
-uno::Reference<xml::sax::XFastContextHandler>
+uno::Reference<xml::sax::XFastContextHandler> const &
 ShapeContextHandler::getDiagramShapeContext()
 {
     if (!mxDiagramShapeContext.is())
diff --git a/oox/source/shape/ShapeContextHandler.hxx b/oox/source/shape/ShapeContextHandler.hxx
index 353b7c538777..103a8106bd08 100644
--- a/oox/source/shape/ShapeContextHandler.hxx
+++ b/oox/source/shape/ShapeContextHandler.hxx
@@ -169,13 +169,13 @@ private:
     css::uno::Reference<css::drawing::XDrawPage> mxDrawPage;
     OUString msRelationFragmentPath;
 
-    css::uno::Reference<XFastContextHandler> getGraphicShapeContext(::sal_Int32 Element);
-    css::uno::Reference<XFastContextHandler> getChartShapeContext(::sal_Int32 Element);
-    css::uno::Reference<XFastContextHandler> getDrawingShapeContext();
-    css::uno::Reference<XFastContextHandler> getDiagramShapeContext();
-    css::uno::Reference<XFastContextHandler> getLockedCanvasContext(sal_Int32 nElement);
-    css::uno::Reference<XFastContextHandler> getWpsContext(sal_Int32 nStartElement, sal_Int32 nElement);
-    css::uno::Reference<XFastContextHandler> getWpgContext(sal_Int32 nElement);
+    css::uno::Reference<XFastContextHandler> const & getGraphicShapeContext(::sal_Int32 Element);
+    css::uno::Reference<XFastContextHandler> const & getChartShapeContext(::sal_Int32 Element);
+    css::uno::Reference<XFastContextHandler> const & getDrawingShapeContext();
+    css::uno::Reference<XFastContextHandler> const & getDiagramShapeContext();
+    css::uno::Reference<XFastContextHandler> const & getLockedCanvasContext(sal_Int32 nElement);
+    css::uno::Reference<XFastContextHandler> const & getWpsContext(sal_Int32 nStartElement, sal_Int32 nElement);
+    css::uno::Reference<XFastContextHandler> const & getWpgContext(sal_Int32 nElement);
     css::uno::Reference<XFastContextHandler> getContextHandler(sal_Int32 nElement = 0);
 };
 
diff --git a/opencl/inc/opencl_device.hxx b/opencl/inc/opencl_device.hxx
index 216af72de849..a42b57541365 100644
--- a/opencl/inc/opencl_device.hxx
+++ b/opencl/inc/opencl_device.hxx
@@ -14,7 +14,7 @@
 
 namespace opencl {
 
-ds_device getDeviceSelection(OUString const & pFileName, bool bForceSelection = false);
+ds_device const & getDeviceSelection(OUString const & pFileName, bool bForceSelection = false);
 
 struct GPUEnv;
 void releaseOpenCLEnv( GPUEnv *gpuInfo );
diff --git a/opencl/source/opencl_device.cxx b/opencl/source/opencl_device.cxx
index cfeb290645ea..9dc0130d6bad 100644
--- a/opencl/source/opencl_device.cxx
+++ b/opencl/source/opencl_device.cxx
@@ -555,7 +555,7 @@ void writeDevicesLog(std::unique_ptr<ds_profile>& rProfile, OUString const & sPr
 
 } // end anonymous namespace
 
-ds_device getDeviceSelection(
+ds_device const & getDeviceSelection(
     OUString const & sProfilePath, bool bForceSelection)
 {
     /* Run only if device is not yet selected */
diff --git a/opencl/source/openclwrapper.cxx b/opencl/source/openclwrapper.cxx
index 0dd76e74ba05..32f0e5f4effc 100644
--- a/opencl/source/openclwrapper.cxx
+++ b/opencl/source/openclwrapper.cxx
@@ -85,7 +85,7 @@ OString generateMD5(const void* pData, size_t length)
     return aBuffer.makeStringAndClear();
 }
 
-OString getCacheFolder()
+OString const & getCacheFolder()
 {
     static OString aCacheFolder;
 
diff --git a/package/inc/ZipPackageStream.hxx b/package/inc/ZipPackageStream.hxx
index aa6b45f17048..67f536816a0a 100644
--- a/package/inc/ZipPackageStream.hxx
+++ b/package/inc/ZipPackageStream.hxx
@@ -72,7 +72,7 @@ private:
     bool m_bRawStream;
 
     /// Check that m_xStream implements io::XSeekable and return it
-    css::uno::Reference< css::io::XInputStream > GetOwnSeekStream();
+    css::uno::Reference< css::io::XInputStream > const & GetOwnSeekStream();
     css::uno::Reference< css::io::XInputStream > SAL_CALL getRawData()
         throw(css::uno::RuntimeException);
 
diff --git a/package/source/xstor/owriteablestream.cxx b/package/source/xstor/owriteablestream.cxx
index 97342933d60f..7e600238c3bd 100644
--- a/package/source/xstor/owriteablestream.cxx
+++ b/package/source/xstor/owriteablestream.cxx
@@ -511,7 +511,7 @@ void OWriteStream_Impl::DisposeWrappers()
     }
 }
 
-OUString OWriteStream_Impl::GetFilledTempFileIfNo( const uno::Reference< io::XInputStream >& xStream )
+OUString const & OWriteStream_Impl::GetFilledTempFileIfNo( const uno::Reference< io::XInputStream >& xStream )
 {
     if ( !m_aTempURL.getLength() )
     {
@@ -560,7 +560,7 @@ OUString OWriteStream_Impl::GetFilledTempFileIfNo( const uno::Reference< io::XIn
     return m_aTempURL;
 }
 
-OUString OWriteStream_Impl::FillTempGetFileName()
+OUString const & OWriteStream_Impl::FillTempGetFileName()
 {
     // should try to create cache first, if the amount of contents is too big, the temp file should be taken
     if ( !m_xCacheStream.is() && m_aTempURL.isEmpty() )
@@ -955,7 +955,7 @@ void OWriteStream_Impl::Revert()
     }
 }
 
-uno::Sequence< beans::PropertyValue > OWriteStream_Impl::GetStreamProperties()
+uno::Sequence< beans::PropertyValue > const & OWriteStream_Impl::GetStreamProperties()
 {
     if ( !m_aProps.getLength() )
         m_aProps = ReadPackageStreamProperties();
diff --git a/package/source/xstor/owriteablestream.hxx b/package/source/xstor/owriteablestream.hxx
index a1dcaf3f5587..63c7fccee258 100644
--- a/package/source/xstor/owriteablestream.hxx
+++ b/package/source/xstor/owriteablestream.hxx
@@ -124,8 +124,8 @@ struct OWriteStream_Impl : public MutexHolder
     sal_Int32 m_nRelId;
 
 private:
-    OUString GetFilledTempFileIfNo( const css::uno::Reference< css::io::XInputStream >& xStream );
-    OUString FillTempGetFileName();
+    OUString const & GetFilledTempFileIfNo( const css::uno::Reference< css::io::XInputStream >& xStream );
+    OUString const & FillTempGetFileName();
     css::uno::Reference< css::io::XStream >       GetTempFileAsStream();
     css::uno::Reference< css::io::XInputStream >  GetTempFileAsInputStream();
 
@@ -187,7 +187,7 @@ public:
     void Commit();
     void Revert();
 
-    css::uno::Sequence< css::beans::PropertyValue > GetStreamProperties();
+    css::uno::Sequence< css::beans::PropertyValue > const & GetStreamProperties();
 
     css::uno::Sequence< css::uno::Sequence< css::beans::StringPair > > GetAllRelationshipsIfAny();
 
diff --git a/package/source/zippackage/ZipPackageStream.cxx b/package/source/zippackage/ZipPackageStream.cxx
index e72c3999c9f5..a07fa0f956e0 100644
--- a/package/source/zippackage/ZipPackageStream.cxx
+++ b/package/source/zippackage/ZipPackageStream.cxx
@@ -149,7 +149,7 @@ void ZipPackageStream::CloseOwnStreamIfAny()
     }
 }
 
-uno::Reference< io::XInputStream > ZipPackageStream::GetOwnSeekStream()
+uno::Reference< io::XInputStream > const & ZipPackageStream::GetOwnSeekStream()
 {
     if ( !m_bHasSeekable && m_xStream.is() )
     {
diff --git a/pyuno/source/module/pyuno_impl.hxx b/pyuno/source/module/pyuno_impl.hxx
index 834333e61e7d..31b43ceb7366 100644
--- a/pyuno/source/module/pyuno_impl.hxx
+++ b/pyuno/source/module/pyuno_impl.hxx
@@ -318,7 +318,7 @@ struct RuntimeCargo
     FILE *logFile;
     sal_Int32 logLevel;
 
-    PyRef getUnoModule();
+    PyRef const & getUnoModule();
 };
 
 struct stRuntimeImpl
diff --git a/pyuno/source/module/pyuno_runtime.cxx b/pyuno/source/module/pyuno_runtime.cxx
index 1cc944780871..2a3a9e7d05f0 100644
--- a/pyuno/source/module/pyuno_runtime.cxx
+++ b/pyuno/source/module/pyuno_runtime.cxx
@@ -1025,7 +1025,7 @@ PyThreadDetach::~PyThreadDetach()
 }
 
 
-PyRef RuntimeCargo::getUnoModule()
+PyRef const & RuntimeCargo::getUnoModule()
 {
     if( ! dictUnoModule.is() )
     {
diff --git a/reportdesign/source/ui/inc/ReportController.hxx b/reportdesign/source/ui/inc/ReportController.hxx
index 4082efb9766a..c26355ab6d29 100644
--- a/reportdesign/source/ui/inc/ReportController.hxx
+++ b/reportdesign/source/ui/inc/ReportController.hxx
@@ -431,7 +431,7 @@ namespace rptui
             The caller is allowed to hold a reference to the RowSet - it is kept alive as long
             as the controller lives, and it's settings will follow the report definition's settings.
         */
-        css::uno::Reference< css::sdbc::XRowSet > getRowSet();
+        css::uno::Reference< css::sdbc::XRowSet > const & getRowSet();
 
         /** returns the number formatter
         */
@@ -460,7 +460,7 @@ namespace rptui
 
         OSectionWindow* getSectionWindow(const css::uno::Reference< css::report::XSection>& _xSection) const;
 
-        css::uno::Reference< css::container::XNameAccess > getColumns() const;
+        css::uno::Reference< css::container::XNameAccess > const & getColumns() const;
         OUString getColumnLabel_throw(const OUString& i_sColumnName) const;
 
         SfxUndoManager& getUndoManager() const;
diff --git a/reportdesign/source/ui/report/ReportController.cxx b/reportdesign/source/ui/report/ReportController.cxx
index 94c67dedfc34..0ca28052c41b 100644
--- a/reportdesign/source/ui/report/ReportController.cxx
+++ b/reportdesign/source/ui/report/ReportController.cxx
@@ -2978,7 +2978,7 @@ uno::Reference< frame::XModel >  SAL_CALL OReportController::getModel() throw( u
     return m_xReportDefinition.get();
 }
 
-uno::Reference< sdbc::XRowSet > OReportController::getRowSet()
+uno::Reference< sdbc::XRowSet > const & OReportController::getRowSet()
 {
     OSL_PRECOND( m_xReportDefinition.is(), "OReportController::getRowSet: no report definition?!" );
 
@@ -4318,7 +4318,7 @@ embed::VisualRepresentation SAL_CALL OReportController::getPreferredVisualRepres
     return embed::EmbedMapUnits::ONE_100TH_MM;
 }
 
-uno::Reference< container::XNameAccess > OReportController::getColumns() const
+uno::Reference< container::XNameAccess > const & OReportController::getColumns() const
 {
     if ( !m_xColumns.is() && m_xReportDefinition.is() && !m_xReportDefinition->getCommand().isEmpty() )
     {
diff --git a/rsc/inc/rsctop.hxx b/rsc/inc/rsctop.hxx
index 59e4e077f686..6d571145ced7 100644
--- a/rsc/inc/rsctop.hxx
+++ b/rsc/inc/rsctop.hxx
@@ -61,7 +61,7 @@ public:
                                 const OString& rParType );
             RscTop* GetRefClass() const { return pRefClass; }
     virtual RSCCLASS_TYPE GetClassType() const = 0;
-            RSCINST GetDefault();
+            RSCINST const & GetDefault();
 
                     // preparation fro the destructor call
                     // given that classes can have mutual dependencies,
diff --git a/rsc/source/parser/rscdb.cxx b/rsc/source/parser/rscdb.cxx
index b0e48074aec5..c96b7f172cd9 100644
--- a/rsc/source/parser/rscdb.cxx
+++ b/rsc/source/parser/rscdb.cxx
@@ -403,13 +403,13 @@ public:
             aEnumObj.fOutput  = fOutput;
             pRoot             = pR;
         }
-    ERRTYPE WriteRc()
+    ERRTYPE const & WriteRc()
         {
             aEnumObj.aError.Clear();
             pRoot->EnumNodes( LINK( this, RscEnumerateRef, CallBackWriteRc ) );
             return aEnumObj.aError;
         }
-    ERRTYPE WriteSrc( sal_uLong lFileKey )
+    ERRTYPE const & WriteSrc( sal_uLong lFileKey )
         {
             aEnumObj.lFileKey = lFileKey;
 
diff --git a/rsc/source/res/rsctop.cxx b/rsc/source/res/rsctop.cxx
index 04cc8a6358cf..47fa95a7f1bd 100644
--- a/rsc/source/res/rsctop.cxx
+++ b/rsc/source/res/rsctop.cxx
@@ -41,7 +41,7 @@ void RscTop::SetCallPar(const OString& rPar1, const OString& rPar2,
     aCallParType = rParType;
 }
 
-RSCINST RscTop::GetDefault()
+RSCINST const & RscTop::GetDefault()
 {
     if( !aDfltInst.IsInst() )
         aDfltInst = this->Create( nullptr, RSCINST() );
diff --git a/sal/qa/osl/file/osl_File.cxx b/sal/qa/osl/file/osl_File.cxx
index 155dfec0d82f..01a49540d23d 100644
--- a/sal/qa/osl/file/osl_File.cxx
+++ b/sal/qa/osl/file/osl_File.cxx
@@ -4812,7 +4812,7 @@ namespace osl_Directory
 
 #define TEST_PATH_POSTFIX "hello/world"
 
-    OUString get_test_path()
+    OUString const & get_test_path()
     {
         static OUString test_path;
         if (test_path.isEmpty())
diff --git a/sc/inc/docuno.hxx b/sc/inc/docuno.hxx
index 47d7997caef3..43b5de9a01a6 100644
--- a/sc/inc/docuno.hxx
+++ b/sc/inc/docuno.hxx
@@ -106,7 +106,7 @@ private:
     bool                    FillRenderMarkData( const css::uno::Any& aSelection,
                                                 const css::uno::Sequence< css::beans::PropertyValue >& rOptions,
                                                 ScMarkData& rMark, ScPrintSelectionStatus& rStatus, OUString& rPagesStr ) const;
-    css::uno::Reference<css::uno::XAggregation> GetFormatter();
+    css::uno::Reference<css::uno::XAggregation> const & GetFormatter();
     void                    HandleCalculateEvents();
 
     css::uno::Reference<css::uno::XInterface> create(
diff --git a/sc/inc/dpobject.hxx b/sc/inc/dpobject.hxx
index ad56ed2c7291..92ceff14fa0a 100644
--- a/sc/inc/dpobject.hxx
+++ b/sc/inc/dpobject.hxx
@@ -151,7 +151,7 @@ public:
     const ScImportSourceDesc* GetImportSourceDesc() const   { return pImpDesc; }
     const ScDPServiceDesc* GetDPServiceDesc() const { return pServDesc; }
 
-    css::uno::Reference<css::sheet::XDimensionsSupplier> GetSource();
+    css::uno::Reference<css::sheet::XDimensionsSupplier> const & GetSource();
 
     bool                IsSheetData() const;
     bool                IsImportData() const { return(pImpDesc != nullptr); }
diff --git a/sc/inc/pivot.hxx b/sc/inc/pivot.hxx
index ae3fdd5a9167..a2fa951e0703 100644
--- a/sc/inc/pivot.hxx
+++ b/sc/inc/pivot.hxx
@@ -92,7 +92,7 @@ struct ScDPLabelData
          * when the layout name is present, use it, or else use the original
          * name.
          */
-        OUString SC_DLLPUBLIC getDisplayName() const;
+        SC_DLLPUBLIC OUString const & getDisplayName() const;
     };
     std::vector<Member>                    maMembers;
     css::uno::Sequence<OUString>           maHiers;        ///< Hierarchies.
@@ -106,7 +106,7 @@ struct ScDPLabelData
      * @return the name that should be displayed in the dp dialogs i.e. when
      * the layout name is present, use it, or else use the original name.
      */
-    OUString SC_DLLPUBLIC getDisplayName() const;
+    SC_DLLPUBLIC OUString const & getDisplayName() const;
 };
 
 typedef std::vector< std::unique_ptr<ScDPLabelData> > ScDPLabelDataVector;
diff --git a/sc/inc/viewopti.hxx b/sc/inc/viewopti.hxx
index 259653d1dc77..580a2b38bdea 100644
--- a/sc/inc/viewopti.hxx
+++ b/sc/inc/viewopti.hxx
@@ -92,7 +92,7 @@ public:
     ScVObjMode              GetObjMode( ScVObjType eObj ) const             { return aModeArr[eObj]; }
 
     void                    SetGridColor( const Color& rCol, const OUString& rName ) { aGridCol = rCol; aGridColName = rName;}
-    Color                   GetGridColor( OUString* pStrName = nullptr ) const;
+    Color const &           GetGridColor( OUString* pStrName = nullptr ) const;
 
     const ScGridOptions&    GetGridOptions() const                      { return aGridOpt; }
     void                    SetGridOptions( const ScGridOptions& rNew ) { aGridOpt = rNew; }
diff --git a/sc/source/core/data/dpobject.cxx b/sc/source/core/data/dpobject.cxx
index 987572bf1460..733ff90a535b 100644
--- a/sc/source/core/data/dpobject.cxx
+++ b/sc/source/core/data/dpobject.cxx
@@ -525,7 +525,7 @@ bool ScDPObject::IsDataDescriptionCell(const ScAddress& rPos)
     return (rPos == aTabRange.aStart);
 }
 
-uno::Reference<sheet::XDimensionsSupplier> ScDPObject::GetSource()
+uno::Reference<sheet::XDimensionsSupplier> const & ScDPObject::GetSource()
 {
     CreateObjects();
     return xSource;
diff --git a/sc/source/core/data/pivot2.cxx b/sc/source/core/data/pivot2.cxx
index 62a2f3b508f0..cbb6f838b1ec 100644
--- a/sc/source/core/data/pivot2.cxx
+++ b/sc/source/core/data/pivot2.cxx
@@ -62,7 +62,7 @@ ScDPLabelData::Member::Member() :
     mbShowDetails(true)
 {}
 
-OUString ScDPLabelData::Member::getDisplayName() const
+OUString const & ScDPLabelData::Member::getDisplayName() const
 {
     if (!maLayoutName.isEmpty())
         return maLayoutName;
@@ -83,7 +83,7 @@ ScDPLabelData::ScDPLabelData() :
     mbRepeatItemLabels(false)
 {}
 
-OUString ScDPLabelData::getDisplayName() const
+OUString const & ScDPLabelData::getDisplayName() const
 {
     if (!maLayoutName.isEmpty())
         return maLayoutName;
diff --git a/sc/source/core/opencl/formulagroupcl.cxx b/sc/source/core/opencl/formulagroupcl.cxx
index aa110460f97a..55fd807de498 100644
--- a/sc/source/core/opencl/formulagroupcl.cxx
+++ b/sc/source/core/opencl/formulagroupcl.cxx
@@ -3694,7 +3694,7 @@ public:
     void CodeGen();
 
     /// Produce kernel hash
-    std::string GetMD5();
+    std::string const & GetMD5();
 
     /// Create program, build, and create kernel
     /// TODO cache results based on kernel body hash
@@ -3792,7 +3792,7 @@ void DynamicKernel::CodeGen()
         << " program to be compiled:\n" << linenumberify(mFullProgramSrc));
 }
 
-std::string DynamicKernel::GetMD5()
+std::string const & DynamicKernel::GetMD5()
 {
     if (mKernelHash.empty())
     {
diff --git a/sc/source/core/tool/calcconfig.cxx b/sc/source/core/tool/calcconfig.cxx
index 96277ce01194..6f287307a912 100644
--- a/sc/source/core/tool/calcconfig.cxx
+++ b/sc/source/core/tool/calcconfig.cxx
@@ -24,7 +24,7 @@
 
 using comphelper::ConfigurationListener;
 
-static rtl::Reference<ConfigurationListener> getMiscListener()
+static rtl::Reference<ConfigurationListener> const & getMiscListener()
 {
     static rtl::Reference<ConfigurationListener> xListener;
     if (!xListener.is())
diff --git a/sc/source/core/tool/viewopti.cxx b/sc/source/core/tool/viewopti.cxx
index e7f49ba79ac8..863fbe0dfc25 100644
--- a/sc/source/core/tool/viewopti.cxx
+++ b/sc/source/core/tool/viewopti.cxx
@@ -136,7 +136,7 @@ void ScViewOptions::SetDefaults()
     aGridOpt.SetDefaults();
 }
 
-Color ScViewOptions::GetGridColor( OUString* pStrName ) const
+Color const & ScViewOptions::GetGridColor( OUString* pStrName ) const
 {
     if ( pStrName )
         *pStrName = aGridColName;
diff --git a/sc/source/filter/excel/xechart.cxx b/sc/source/filter/excel/xechart.cxx
index c2860104703b..5c24f293110b 100644
--- a/sc/source/filter/excel/xechart.cxx
+++ b/sc/source/filter/excel/xechart.cxx
@@ -304,7 +304,7 @@ XclExpChRoot::~XclExpChRoot()
 {
 }
 
-Reference< XChartDocument > XclExpChRoot::GetChartDocument() const
+Reference< XChartDocument > const & XclExpChRoot::GetChartDocument() const
 {
     return mxChData->mxChartDoc;
 }
diff --git a/sc/source/filter/excel/xeroot.cxx b/sc/source/filter/excel/xeroot.cxx
index e51fa8a6f1a8..dd548a959d64 100644
--- a/sc/source/filter/excel/xeroot.cxx
+++ b/sc/source/filter/excel/xeroot.cxx
@@ -364,7 +364,7 @@ uno::Sequence< beans::NamedValue > XclExpRoot::GenerateDefaultEncryptionData() c
     return aEncryptionData;
 }
 
-XclExpRootData::XclExpLinkMgrRef XclExpRoot::GetLocalLinkMgrRef() const
+XclExpRootData::XclExpLinkMgrRef const & XclExpRoot::GetLocalLinkMgrRef() const
 {
     return IsInGlobals() ? mrExpData.mxGlobLinkMgr : mrExpData.mxLocLinkMgr;
 }
diff --git a/sc/source/filter/inc/commentsbuffer.hxx b/sc/source/filter/inc/commentsbuffer.hxx
index a4d19a8617f6..255c5a98100a 100644
--- a/sc/source/filter/inc/commentsbuffer.hxx
+++ b/sc/source/filter/inc/commentsbuffer.hxx
@@ -58,7 +58,7 @@ public:
     void                importComment( SequenceInputStream& rStrm );
 
     /** Creates and returns a new rich-string object for the comment text. */
-    RichStringRef       createText();
+    RichStringRef const & createText();
 
     /** Finalizes the formatted string of the comment. */
     void                finalizeImport();
diff --git a/sc/source/filter/inc/richstring.hxx b/sc/source/filter/inc/richstring.hxx
index bfd48f107f4c..e00aad4d4c4e 100644
--- a/sc/source/filter/inc/richstring.hxx
+++ b/sc/source/filter/inc/richstring.hxx
@@ -43,7 +43,7 @@ public:
     /** Sets text data for this portion. */
     void                setText( const OUString& rText );
     /** Creates and returns a new font formatting object. */
-    FontRef             createFont();
+    FontRef const &     createFont();
     /** Links this portion to a font object from the global font list. */
     void                setFontId( sal_Int32 nFontId );
 
diff --git a/sc/source/filter/inc/stylesbuffer.hxx b/sc/source/filter/inc/stylesbuffer.hxx
index 020ddd9d0b07..ead10940eb45 100644
--- a/sc/source/filter/inc/stylesbuffer.hxx
+++ b/sc/source/filter/inc/stylesbuffer.hxx
@@ -676,11 +676,11 @@ public:
     explicit            Dxf( const WorkbookHelper& rHelper );
 
     /** Creates a new empty font object. */
-    FontRef             createFont( bool bAlwaysNew = true );
+    FontRef const &     createFont( bool bAlwaysNew = true );
     /** Creates a new empty border object. */
-    BorderRef           createBorder( bool bAlwaysNew = true );
+    BorderRef const &   createBorder( bool bAlwaysNew = true );
     /** Creates a new empty fill object. */
-    FillRef             createFill( bool bAlwaysNew = true );
+    FillRef const &     createFill( bool bAlwaysNew = true );
 
     /** Inserts a new number format code. */
     void                importNumFmt( const AttributeList& rAttribs );
diff --git a/sc/source/filter/inc/workbooksettings.hxx b/sc/source/filter/inc/workbooksettings.hxx
index e384dec70853..02c8fa204a7f 100644
--- a/sc/source/filter/inc/workbooksettings.hxx
+++ b/sc/source/filter/inc/workbooksettings.hxx
@@ -98,7 +98,7 @@ public:
     /** Returns the show objects mode (considered a view setting in Calc). */
     sal_Int16           getApiShowObjectMode() const;
     /** Returns the nulldate of this workbook. */
-    css::util::Date     getNullDate() const;
+    css::util::Date const & getNullDate() const;
 
 private:
     /** Updates date mode and unit converter nulldate. */
diff --git a/sc/source/filter/inc/xechart.hxx b/sc/source/filter/inc/xechart.hxx
index 94b98e7c1a9d..4fe5f5c3baa2 100644
--- a/sc/source/filter/inc/xechart.hxx
+++ b/sc/source/filter/inc/xechart.hxx
@@ -86,7 +86,7 @@ public:
     /** Returns this root instance - for code readability in derived classes. */
     inline const XclExpChRoot& GetChRoot() const { return *this; }
     /** Returns the API Chart document model. */
-    css::uno::Reference< css::chart2::XChartDocument >
+    css::uno::Reference< css::chart2::XChartDocument > const &
                         GetChartDocument() const;
     /** Returns a reference to the parent chart data object. */
     XclExpChChart&      GetChartData() const;
diff --git a/sc/source/filter/inc/xeroot.hxx b/sc/source/filter/inc/xeroot.hxx
index d52a8edc6679..941e01ca61e5 100644
--- a/sc/source/filter/inc/xeroot.hxx
+++ b/sc/source/filter/inc/xeroot.hxx
@@ -182,7 +182,7 @@ public:
 private:
 
     /** Returns the local or global link manager, depending on current context. */
-    XclExpRootData::XclExpLinkMgrRef GetLocalLinkMgrRef() const;
+    XclExpRootData::XclExpLinkMgrRef const & GetLocalLinkMgrRef() const;
 
 private:
     XclExpRootData& mrExpData;      /// Reference to the global export data struct.
diff --git a/sc/source/filter/oox/commentsbuffer.cxx b/sc/source/filter/oox/commentsbuffer.cxx
index e29a278b6fb3..f6c146b62541 100644
--- a/sc/source/filter/oox/commentsbuffer.cxx
+++ b/sc/source/filter/oox/commentsbuffer.cxx
@@ -124,7 +124,7 @@ void Comment::importComment( SequenceInputStream& rStrm )
     AddressConverter::convertToCellRangeUnchecked( maModel.maRange, aBinRange, getSheetIndex() );
 }
 
-RichStringRef Comment::createText()
+RichStringRef const & Comment::createText()
 {
     maModel.mxText.reset( new RichString( *this ) );
     return maModel.mxText;
diff --git a/sc/source/filter/oox/richstring.cxx b/sc/source/filter/oox/richstring.cxx
index b79f5e582b86..da88e98d7941 100644
--- a/sc/source/filter/oox/richstring.cxx
+++ b/sc/source/filter/oox/richstring.cxx
@@ -61,7 +61,7 @@ void RichStringPortion::setText( const OUString& rText )
     maText = rText;
 }
 
-FontRef RichStringPortion::createFont()
+FontRef const & RichStringPortion::createFont()
 {
     mxFont.reset( new Font( *this, false ) );
     return mxFont;
diff --git a/sc/source/filter/oox/stylesbuffer.cxx b/sc/source/filter/oox/stylesbuffer.cxx
index 2e03ef8801a1..6b8b9422c117 100644
--- a/sc/source/filter/oox/stylesbuffer.cxx
+++ b/sc/source/filter/oox/stylesbuffer.cxx
@@ -2238,21 +2238,21 @@ Dxf::Dxf( const WorkbookHelper& rHelper ) :
 {
 }
 
-FontRef Dxf::createFont( bool bAlwaysNew )
+FontRef const & Dxf::createFont( bool bAlwaysNew )
 {
     if( bAlwaysNew || !mxFont )
         mxFont.reset( new Font( *this, true ) );
     return mxFont;
 }
 
-BorderRef Dxf::createBorder( bool bAlwaysNew )
+BorderRef const & Dxf::createBorder( bool bAlwaysNew )
 {
     if( bAlwaysNew || !mxBorder )
         mxBorder.reset( new Border( *this, true ) );
     return mxBorder;
 }
 
-FillRef Dxf::createFill( bool bAlwaysNew )
+FillRef const & Dxf::createFill( bool bAlwaysNew )
 {
     if( bAlwaysNew || !mxFill )
         mxFill.reset( new Fill( *this, true ) );
diff --git a/sc/source/filter/oox/workbooksettings.cxx b/sc/source/filter/oox/workbooksettings.cxx
index dbe5473a0f88..c8cc6bd42d05 100644
--- a/sc/source/filter/oox/workbooksettings.cxx
+++ b/sc/source/filter/oox/workbooksettings.cxx
@@ -239,7 +239,7 @@ sal_Int16 WorkbookSettings::getApiShowObjectMode() const
     return API_SHOWMODE_SHOW;
 }
 
-css::util::Date WorkbookSettings::getNullDate() const
+css::util::Date const & WorkbookSettings::getNullDate() const
 {
     static const css::util::Date saDate1900                 ( 30, 12, 1899 );
     static const css::util::Date saDate1904                 ( 1, 1, 1904 );
diff --git a/sc/source/filter/xml/xmlsubti.cxx b/sc/source/filter/xml/xmlsubti.cxx
index 88b3ede5fad7..a277b0da5ffc 100644
--- a/sc/source/filter/xml/xmlsubti.cxx
+++ b/sc/source/filter/xml/xmlsubti.cxx
@@ -222,7 +222,7 @@ void ScMyTables::AddColStyle(const sal_Int32 nRepeat, const OUString& rCellStyle
     nCurrentColCount = std::min<sal_Int32>( nCurrentColCount, MAXCOLCOUNT );
 }
 
-uno::Reference< drawing::XDrawPage > ScMyTables::GetCurrentXDrawPage()
+uno::Reference< drawing::XDrawPage > const & ScMyTables::GetCurrentXDrawPage()
 {
     if( (maCurrentCellPos.Tab() != nCurrentDrawPage) || !xDrawPage.is() )
     {
@@ -234,7 +234,7 @@ uno::Reference< drawing::XDrawPage > ScMyTables::GetCurrentXDrawPage()
     return xDrawPage;
 }
 
-uno::Reference< drawing::XShapes > ScMyTables::GetCurrentXShapes()
+uno::Reference< drawing::XShapes > const & ScMyTables::GetCurrentXShapes()
 {
     if( (maCurrentCellPos.Tab() != nCurrentXShapes) || !xShapes.is() )
     {
@@ -242,10 +242,8 @@ uno::Reference< drawing::XShapes > ScMyTables::GetCurrentXShapes()
         rImport.GetShapeImport()->startPage(xShapes);
         rImport.GetShapeImport()->pushGroupForSorting ( xShapes );
         nCurrentXShapes = sal::static_int_cast<sal_Int16>(maCurrentCellPos.Tab());
-        return xShapes;
     }
-    else
-        return xShapes;
+    return xShapes;
 }
 
 bool ScMyTables::HasDrawPage()
diff --git a/sc/source/filter/xml/xmlsubti.hxx b/sc/source/filter/xml/xmlsubti.hxx
index 00176300c561..83a93b7806d1 100644
--- a/sc/source/filter/xml/xmlsubti.hxx
+++ b/sc/source/filter/xml/xmlsubti.hxx
@@ -88,9 +88,9 @@ public:
     SCROW                               GetCurrentRow() const { return (maCurrentCellPos.Row() >= 0) ? maCurrentCellPos.Row() : 0; }
     const css::uno::Reference< css::sheet::XSpreadsheet >&
                                         GetCurrentXSheet() const { return xCurrentSheet; }
-    css::uno::Reference< css::drawing::XDrawPage >
+    css::uno::Reference< css::drawing::XDrawPage > const &
                                         GetCurrentXDrawPage();
-    css::uno::Reference< css::drawing::XShapes >
+    css::uno::Reference< css::drawing::XShapes > const &
                                         GetCurrentXShapes();
     bool                                HasDrawPage();
     bool                                HasXShapes();
diff --git a/sc/source/ui/unoobj/docuno.cxx b/sc/source/ui/unoobj/docuno.cxx
index 509d22e9b346..4ce35d1c14c0 100644
--- a/sc/source/ui/unoobj/docuno.cxx
+++ b/sc/source/ui/unoobj/docuno.cxx
@@ -397,7 +397,7 @@ ScModelObj::~ScModelObj()
     delete pPrinterOptions;
 }
 
-uno::Reference< uno::XAggregation> ScModelObj::GetFormatter()
+uno::Reference< uno::XAggregation> const & ScModelObj::GetFormatter()
 {
     // pDocShell may be NULL if this is the base of a ScDocOptionsObj
     if ( !xNumberAgg.is() && pDocShell )
diff --git a/sc/source/ui/vba/excelvbahelper.cxx b/sc/source/ui/vba/excelvbahelper.cxx
index e381c399dcc7..b6619f2409b7 100644
--- a/sc/source/ui/vba/excelvbahelper.cxx
+++ b/sc/source/ui/vba/excelvbahelper.cxx
@@ -109,7 +109,7 @@ class PasteCellsWarningReseter
 {
 private:
     bool bInitialWarningState;
-    static uno::Reference< sheet::XGlobalSheetSettings > getGlobalSheetSettings() throw ( uno::RuntimeException )
+    static uno::Reference< sheet::XGlobalSheetSettings > const & getGlobalSheetSettings() throw ( uno::RuntimeException )
     {
         static uno::Reference< sheet::XGlobalSheetSettings > xProps = sheet::GlobalSheetSettings::create( comphelper::getProcessComponentContext() );
         return xProps;
diff --git a/sc/source/ui/vba/vbaapplication.cxx b/sc/source/ui/vba/vbaapplication.cxx
index 5f3d8529fd24..aaba52dfd372 100644
--- a/sc/source/ui/vba/vbaapplication.cxx
+++ b/sc/source/ui/vba/vbaapplication.cxx
@@ -850,7 +850,7 @@ ScVbaApplication::Calculate() throw(  script::BasicErrorException , uno::Runtime
     xCalculatable->calculateAll();
 }
 
-static uno::Reference< util::XPathSettings > lcl_getPathSettingsService( const uno::Reference< uno::XComponentContext >& xContext ) throw ( uno::RuntimeException )
+static uno::Reference< util::XPathSettings > const & lcl_getPathSettingsService( const uno::Reference< uno::XComponentContext >& xContext ) throw ( uno::RuntimeException )
 {
     static uno::Reference< util::XPathSettings >  xPathSettings;
     if ( !xPathSettings.is() )
diff --git a/sc/source/ui/vba/vbachartobject.cxx b/sc/source/ui/vba/vbachartobject.cxx
index 1c51d1e503a0..3d9778a4f1ad 100644
--- a/sc/source/ui/vba/vbachartobject.cxx
+++ b/sc/source/ui/vba/vbachartobject.cxx
@@ -41,7 +41,7 @@ ScVbaChartObject::ScVbaChartObject( const css::uno::Reference< ov::XHelperInterf
         oShapeHelper.reset(new ShapeHelper(xShape));
 }
 
-OUString ScVbaChartObject::getPersistName()
+OUString const & ScVbaChartObject::getPersistName()
 {
     if ( sPersistName.isEmpty() )
         sPersistName = xNamed->getName();
diff --git a/sc/source/ui/vba/vbachartobject.hxx b/sc/source/ui/vba/vbachartobject.hxx
index 097ccf94bce9..95f5df95bc4d 100644
--- a/sc/source/ui/vba/vbachartobject.hxx
+++ b/sc/source/ui/vba/vbachartobject.hxx
@@ -43,7 +43,7 @@ class ScVbaChartObject : public ChartObjectImpl_BASE
     OUString sPersistName;
     std::unique_ptr<ov::ShapeHelper> oShapeHelper;
     css::uno::Reference< css::container::XNamed > xNamedShape;
-    OUString getPersistName();
+    OUString const & getPersistName();
     css::uno::Reference< css::drawing::XShape > setShape() throw ( css::script::BasicErrorException );
 public:
     ScVbaChartObject( const css::uno::Reference< ov::XHelperInterface >& _xParent, const css::uno::Reference< css::uno::XComponentContext >& _xContext, const css::uno::Reference< css::table::XTableChart >& _xTableChart, const css::uno::Reference< css::drawing::XDrawPageSupplier >& _xDrawPageSupplier );
diff --git a/sc/source/ui/vba/vbaformat.cxx b/sc/source/ui/vba/vbaformat.cxx
index ba2db5021e95..2035ba7d1454 100644
--- a/sc/source/ui/vba/vbaformat.cxx
+++ b/sc/source/ui/vba/vbaformat.cxx
@@ -773,7 +773,7 @@ ScVbaFormat< Ifc... >::initializeNumberFormats() throw ( script::BasicErrorExcep
 }
 
 template< typename... Ifc >
-uno::Reference< beans::XPropertyState >
+uno::Reference< beans::XPropertyState > const &
 ScVbaFormat< Ifc... >::getXPropertyState() throw ( uno::RuntimeException )
 {
     if ( !xPropertyState.is() )
diff --git a/sc/source/ui/vba/vbaformat.hxx b/sc/source/ui/vba/vbaformat.hxx
index 1489ec6ee673..573f0664c892 100644
--- a/sc/source/ui/vba/vbaformat.hxx
+++ b/sc/source/ui/vba/vbaformat.hxx
@@ -49,7 +49,7 @@ protected:
     bool mbCheckAmbiguoity;
     bool mbAddIndent;
     bool isAmbiguous(const OUString& _sPropertyName) throw ( css::script::BasicErrorException );
-    css::uno::Reference< css::beans::XPropertyState > getXPropertyState() throw ( css::uno::RuntimeException );
+    css::uno::Reference< css::beans::XPropertyState > const &  getXPropertyState() throw ( css::uno::RuntimeException );
     void initializeNumberFormats() throw ( css::script::BasicErrorException, css::uno::RuntimeException );
     SfxItemSet*  getCurrentDataSet( ) throw (css::uno::RuntimeException, std::exception);
 protected:
diff --git a/sc/source/ui/vba/vbaglobals.cxx b/sc/source/ui/vba/vbaglobals.cxx
index 930f5972073f..52a9e58d9fac 100644
--- a/sc/source/ui/vba/vbaglobals.cxx
+++ b/sc/source/ui/vba/vbaglobals.cxx
@@ -58,13 +58,13 @@ ScVbaGlobals::~ScVbaGlobals()
 
 // XGlobals
 
-uno::Reference<excel::XApplication >
+uno::Reference<excel::XApplication > const &
 ScVbaGlobals::getApplication() throw (uno::RuntimeException)
 {
 //  OSL_TRACE("In ScVbaGlobals::getApplication");
-        if ( !mxApplication.is() )
+    if ( !mxApplication.is() )
         mxApplication.set( new ScVbaApplication( mxContext) );
-       return mxApplication;
+    return mxApplication;
 }
 
 uno::Reference<excel::XApplication > SAL_CALL
diff --git a/sc/source/ui/vba/vbaglobals.hxx b/sc/source/ui/vba/vbaglobals.hxx
index b2195d40e81f..fc3fe0536d54 100644
--- a/sc/source/ui/vba/vbaglobals.hxx
+++ b/sc/source/ui/vba/vbaglobals.hxx
@@ -37,7 +37,7 @@ typedef ::cppu::ImplInheritanceHelper< VbaGlobalsBase, ov::excel::XGlobals > ScV
 class ScVbaGlobals : public ScVbaGlobals_BASE
 {
     css::uno::Reference< ov::excel::XApplication > mxApplication;
-    css::uno::Reference< ov::excel::XApplication > SAL_CALL getApplication()
+    css::uno::Reference< ov::excel::XApplication > const & SAL_CALL getApplication()
                         throw (css::uno::RuntimeException);
 public:
 
diff --git a/sc/source/ui/vba/vbasheetobjects.cxx b/sc/source/ui/vba/vbasheetobjects.cxx
index a677a0ea3fc9..5c52886efc0d 100644
--- a/sc/source/ui/vba/vbasheetobjects.cxx
+++ b/sc/source/ui/vba/vbasheetobjects.cxx
@@ -344,7 +344,7 @@ public:
         sal_Int16 nComponentType ) throw (uno::RuntimeException);
 
 protected:
-    uno::Reference< container::XIndexContainer > createForm() throw (uno::RuntimeException);
+    uno::Reference< container::XIndexContainer > const & createForm() throw (uno::RuntimeException);
 
     virtual bool implPickShape( const uno::Reference< drawing::XShape >& rxShape ) const override;
     virtual OUString implGetShapeServiceName() const override;
@@ -372,7 +372,7 @@ ScVbaControlContainer::ScVbaControlContainer(
 {
 }
 
-uno::Reference< container::XIndexContainer > ScVbaControlContainer::createForm() throw (uno::RuntimeException)
+uno::Reference< container::XIndexContainer > const & ScVbaControlContainer::createForm() throw (uno::RuntimeException)
 {
     if( !mxFormIC.is() )
     {
diff --git a/sd/inc/sdpage.hxx b/sd/inc/sdpage.hxx
index d7da289b6392..ecc4b787421e 100644
--- a/sd/inc/sdpage.hxx
+++ b/sd/inc/sdpage.hxx
@@ -295,13 +295,13 @@ public:
     void getAlienAttributes( css::uno::Any& rAttributes );
 
     /** @return the main animation node */
-    css::uno::Reference< css::animations::XAnimationNode > getAnimationNode() throw (css::uno::RuntimeException);
+    css::uno::Reference< css::animations::XAnimationNode > const & getAnimationNode() throw (css::uno::RuntimeException);
 
     /** sets the main animation node */
     void setAnimationNode( css::uno::Reference< css::animations::XAnimationNode >& xNode ) throw (css::uno::RuntimeException);
 
     /// @return a helper class to manipulate effects inside the main sequence
-    std::shared_ptr< sd::MainSequence > getMainSequence();
+    std::shared_ptr< sd::MainSequence > const & getMainSequence();
 
     /** quick check if this slide has an animation node.
         This can be used to have a cost free check if there are no animations ad this slide.
diff --git a/sd/source/core/sdpage_animations.cxx b/sd/source/core/sdpage_animations.cxx
index df3b68b3bc1c..f58c7047392d 100644
--- a/sd/source/core/sdpage_animations.cxx
+++ b/sd/source/core/sdpage_animations.cxx
@@ -40,7 +40,7 @@ using namespace ::com::sun::star::presentation;
 using ::com::sun::star::drawing::XShape;
 
 /** returns a helper class to manipulate effects inside the main sequence */
-sd::MainSequencePtr SdPage::getMainSequence()
+sd::MainSequencePtr const & SdPage::getMainSequence()
 {
     if( nullptr == mpMainSequence.get() )
         mpMainSequence.reset( new sd::MainSequence( getAnimationNode() ) );
@@ -49,7 +49,7 @@ sd::MainSequencePtr SdPage::getMainSequence()
 }
 
 /** returns the main animation node */
-Reference< XAnimationNode > SdPage::getAnimationNode() throw (RuntimeException)
+Reference< XAnimationNode > const & SdPage::getAnimationNode() throw (RuntimeException)
 {
     if( !mxAnimationNode.is() )
     {
diff --git a/sd/source/filter/html/buttonset.cxx b/sd/source/filter/html/buttonset.cxx
index 7828f8d63633..1eed38115361 100644
--- a/sd/source/filter/html/buttonset.cxx
+++ b/sd/source/filter/html/buttonset.cxx
@@ -145,7 +145,7 @@ public:
 
     void scanForButtonSets( const OUString& rPath );
 
-    Reference< XGraphicProvider > getGraphicProvider();
+    Reference< XGraphicProvider > const & getGraphicProvider();
 
     std::vector< std::shared_ptr< ButtonsImpl > >  maButtons;
     Reference< XGraphicProvider > mxGraphicProvider;
@@ -250,7 +250,7 @@ bool ButtonSetImpl::exportButton( int nSet, const OUString& rPath, const OUStrin
     return false;
 }
 
-Reference< XGraphicProvider > ButtonSetImpl::getGraphicProvider()
+Reference< XGraphicProvider > const & ButtonSetImpl::getGraphicProvider()
 {
     if( !mxGraphicProvider.is() )
     {
diff --git a/sd/source/filter/html/htmlex.cxx b/sd/source/filter/html/htmlex.cxx
index 383f53392577..c5f39da0be1e 100644
--- a/sd/source/filter/html/htmlex.cxx
+++ b/sd/source/filter/html/htmlex.cxx
@@ -2198,7 +2198,7 @@ void HtmlExport::CreateFileNames()
     }
 }
 
-OUString HtmlExport::getDocumentTitle()
+OUString const & HtmlExport::getDocumentTitle()
 {
     // check for a title object in this page, if its the first
     // title it becomes this documents title for the content
diff --git a/sd/source/filter/html/htmlex.hxx b/sd/source/filter/html/htmlex.hxx
index ae681a249246..3344118ab624 100644
--- a/sd/source/filter/html/htmlex.hxx
+++ b/sd/source/filter/html/htmlex.hxx
@@ -167,7 +167,7 @@ class HtmlExport
     bool    checkForExistingFiles();
     bool    checkFileExists( css::uno::Reference< css::ucb::XSimpleFileAccess3 >& xFileAccess, OUString const & aFileName );
 
-    OUString getDocumentTitle();
+    OUString const & getDocumentTitle();
     bool    SavePresentation();
 
     static OUString CreateLink( const OUString& aLink, const OUString& aText,
diff --git a/sd/source/filter/ppt/ppt97animations.cxx b/sd/source/filter/ppt/ppt97animations.cxx
index 6d210bc4493b..d06f8bff7d2e 100644
--- a/sd/source/filter/ppt/ppt97animations.cxx
+++ b/sd/source/filter/ppt/ppt97animations.cxx
@@ -239,12 +239,12 @@ sal_Int16 Ppt97Animation::GetTextAnimationType() const
     }
     return nRet;
 }
-OUString Ppt97Animation::GetPresetId() const
+OUString const & Ppt97Animation::GetPresetId() const
 {
     UpdateCacheData();
     return m_aPresetId;
 }
-OUString Ppt97Animation::GetPresetSubType() const
+OUString const & Ppt97Animation::GetPresetSubType() const
 {
     UpdateCacheData();
     return m_aSubType;
diff --git a/sd/source/filter/ppt/ppt97animations.hxx b/sd/source/filter/ppt/ppt97animations.hxx
index bc9c1a1719e2..eb2079ec8c29 100644
--- a/sd/source/filter/ppt/ppt97animations.hxx
+++ b/sd/source/filter/ppt/ppt97animations.hxx
@@ -117,8 +117,8 @@ public: //public methods
 private: //private methods
 
     //read methods
-    OUString GetPresetId() const;
-    OUString GetPresetSubType() const;
+    OUString const & GetPresetId() const;
+    OUString const & GetPresetSubType() const;
     bool HasAfterEffect() const;
     bool HasAfterEffect_ChangeColor() const;
     bool HasAfterEffect_DimAtNextEffect() const;
diff --git a/sd/source/ui/inc/SlideSorter.hxx b/sd/source/ui/inc/SlideSorter.hxx
index 995e95de87fe..88f4abf8bc96 100644
--- a/sd/source/ui/inc/SlideSorter.hxx
+++ b/sd/source/ui/inc/SlideSorter.hxx
@@ -181,11 +181,11 @@ public:
     /** Return a collection of properties that are used throughout the slide
         sorter.
     */
-    std::shared_ptr<controller::Properties> GetProperties() const;
+    std::shared_ptr<controller::Properties> const & GetProperties() const;
 
     /** Return the active theme which gives access to colors and fonts.
     */
-    std::shared_ptr<view::Theme> GetTheme() const;
+    std::shared_ptr<view::Theme> const & GetTheme() const;
 
 protected:
     /** This virtual method makes it possible to create a specialization of
diff --git a/sd/source/ui/presenter/PresenterTextView.cxx b/sd/source/ui/presenter/PresenterTextView.cxx
index 7ea35795835b..39fec898ad74 100644
--- a/sd/source/ui/presenter/PresenterTextView.cxx
+++ b/sd/source/ui/presenter/PresenterTextView.cxx
@@ -76,7 +76,7 @@ public:
     void SetTop (const sal_Int32 nTop);
     void SetText (const OUString& Text);
     sal_Int32 ParseDistance (const OUString& rsDistance) const;
-    Reference<rendering::XBitmap> GetBitmap();
+    Reference<rendering::XBitmap> const & GetBitmap();
     sal_Int32 GetTotalHeight();
 
 private:
@@ -445,7 +445,7 @@ sal_Int32 PresenterTextView::Implementation::ParseDistance (const OUString& rsDi
     return nDistance;
 }
 
-Reference<rendering::XBitmap> PresenterTextView::Implementation::GetBitmap()
+Reference<rendering::XBitmap> const & PresenterTextView::Implementation::GetBitmap()
 {
     DBG_ASSERT(mpEditEngine!=nullptr, "EditEngine missing");
 
diff --git a/sd/source/ui/slidesorter/controller/SlideSorterController.cxx b/sd/source/ui/slidesorter/controller/SlideSorterController.cxx
index 1f57412a9d8e..d6b3ce6b3bcb 100644
--- a/sd/source/ui/slidesorter/controller/SlideSorterController.cxx
+++ b/sd/source/ui/slidesorter/controller/SlideSorterController.cxx
@@ -239,25 +239,25 @@ ScrollBarManager& SlideSorterController::GetScrollBarManager()
     return *mpScrollBarManager.get();
 }
 
-std::shared_ptr<CurrentSlideManager> SlideSorterController::GetCurrentSlideManager() const
+std::shared_ptr<CurrentSlideManager> const & SlideSorterController::GetCurrentSlideManager() const
 {
     OSL_ASSERT(mpCurrentSlideManager.get()!=nullptr);
     return mpCurrentSlideManager;
 }
 
-std::shared_ptr<SlotManager> SlideSorterController::GetSlotManager() const
+std::shared_ptr<SlotManager> const & SlideSorterController::GetSlotManager() const
 {
     OSL_ASSERT(mpSlotManager.get()!=nullptr);
     return mpSlotManager;
 }
 
-std::shared_ptr<SelectionManager> SlideSorterController::GetSelectionManager() const
+std::shared_ptr<SelectionManager> const & SlideSorterController::GetSelectionManager() const
 {
     OSL_ASSERT(mpSelectionManager.get()!=nullptr);
     return mpSelectionManager;
 }
 
-std::shared_ptr<InsertionIndicatorHandler>
+std::shared_ptr<InsertionIndicatorHandler> const &
     SlideSorterController::GetInsertionIndicatorHandler() const
 {
     OSL_ASSERT(mpInsertionIndicatorHandler.get()!=nullptr);
diff --git a/sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.cxx b/sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.cxx
index 3f433ac44992..6e940bf7e899 100644
--- a/sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.cxx
+++ b/sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.cxx
@@ -171,7 +171,7 @@ void InsertionIndicatorHandler::SetPosition (
     }
 }
 
-std::shared_ptr<view::InsertAnimator> InsertionIndicatorHandler::GetInsertAnimator()
+std::shared_ptr<view::InsertAnimator> const & InsertionIndicatorHandler::GetInsertAnimator()
 {
     if ( ! mpInsertAnimator)
         mpInsertAnimator.reset(new view::InsertAnimator(mrSlideSorter));
diff --git a/sd/source/ui/slidesorter/inc/controller/SlideSorterController.hxx b/sd/source/ui/slidesorter/inc/controller/SlideSorterController.hxx
index fd9ac65f4593..af1145d0752c 100644
--- a/sd/source/ui/slidesorter/inc/controller/SlideSorterController.hxx
+++ b/sd/source/ui/slidesorter/inc/controller/SlideSorterController.hxx
@@ -116,10 +116,10 @@ public:
     */
     ScrollBarManager& GetScrollBarManager();
 
-    std::shared_ptr<CurrentSlideManager> GetCurrentSlideManager() const;
-    std::shared_ptr<SlotManager> GetSlotManager() const;
-    std::shared_ptr<SelectionManager> GetSelectionManager() const;
-    std::shared_ptr<InsertionIndicatorHandler> GetInsertionIndicatorHandler() const;
+    std::shared_ptr<CurrentSlideManager> const & GetCurrentSlideManager() const;
+    std::shared_ptr<SlotManager> const & GetSlotManager() const;
+    std::shared_ptr<SelectionManager> const & GetSelectionManager() const;
+    std::shared_ptr<InsertionIndicatorHandler> const & GetInsertionIndicatorHandler() const;
 
     /** This method forwards the call to the SlideSorterView and executes
         pending operations like moving selected pages into the visible area.
diff --git a/sd/source/ui/slidesorter/inc/controller/SlsInsertionIndicatorHandler.hxx b/sd/source/ui/slidesorter/inc/controller/SlsInsertionIndicatorHandler.hxx
index 80b1049ec61e..f1d287173f60 100644
--- a/sd/source/ui/slidesorter/inc/controller/SlsInsertionIndicatorHandler.hxx
+++ b/sd/source/ui/slidesorter/inc/controller/SlsInsertionIndicatorHandler.hxx
@@ -121,7 +121,7 @@ private:
     void SetPosition (
         const Point& rPoint,
         const Mode eMode);
-    std::shared_ptr<view::InsertAnimator> GetInsertAnimator();
+    std::shared_ptr<view::InsertAnimator> const & GetInsertAnimator();
 
     /** Make the insertion indicator visible (that is the show part) and
         keep it visible, even when the mouse leaves the window (that is the
diff --git a/sd/source/ui/slidesorter/inc/controller/SlsTransferableData.hxx b/sd/source/ui/slidesorter/inc/controller/SlsTransferableData.hxx
index 0907dbbb7edd..aa3898ba517d 100644
--- a/sd/source/ui/slidesorter/inc/controller/SlsTransferableData.hxx
+++ b/sd/source/ui/slidesorter/inc/controller/SlsTransferableData.hxx
@@ -47,7 +47,7 @@ public:
             : maBitmap(rBitmap), mbIsExcluded(bIsExcluded) {}
         Representative (const Representative& rOther)
             : maBitmap(rOther.maBitmap), mbIsExcluded(rOther.mbIsExcluded) {}
-        Representative operator= (Representative const& rOther)
+        Representative& operator= (Representative const& rOther)
         {   if (&rOther != this) {maBitmap = rOther.maBitmap; mbIsExcluded = rOther.mbIsExcluded; }
             return *this;
         }
diff --git a/sd/source/ui/slidesorter/inc/view/SlideSorterView.hxx b/sd/source/ui/slidesorter/inc/view/SlideSorterView.hxx
index 816dc14740ce..48c3cf8a32a0 100644
--- a/sd/source/ui/slidesorter/inc/view/SlideSorterView.hxx
+++ b/sd/source/ui/slidesorter/inc/view/SlideSorterView.hxx
@@ -143,7 +143,7 @@ public:
     */
     void InvalidatePageObjectVisibilities();
 
-    std::shared_ptr<cache::PageCache> GetPreviewCache();
+    std::shared_ptr<cache::PageCache> const & GetPreviewCache();
 
     /** Return the range of currently visible page objects including the
         first and last one in that range.
@@ -151,7 +151,7 @@ public:
             The returned pair of page object indices is empty when the
             second index is lower than the first.
     */
-    Pair GetVisiblePageRange();
+    Pair const & GetVisiblePageRange();
 
     /** Add a shape to the page.  Typically used from inside
         PostModelChange().
@@ -187,7 +187,7 @@ public:
 
     void UpdateOrientation();
 
-    std::shared_ptr<PageObjectPainter> GetPageObjectPainter();
+    std::shared_ptr<PageObjectPainter> const & GetPageObjectPainter();
     const std::shared_ptr<LayeredDevice>& GetLayeredDevice() const { return mpLayeredDevice;}
 
     class DrawLock
diff --git a/sd/source/ui/slidesorter/shell/SlideSorter.cxx b/sd/source/ui/slidesorter/shell/SlideSorter.cxx
index 50975690c27b..79171b327634 100644
--- a/sd/source/ui/slidesorter/shell/SlideSorter.cxx
+++ b/sd/source/ui/slidesorter/shell/SlideSorter.cxx
@@ -417,13 +417,13 @@ void SlideSorter::SetCurrentFunction (const rtl::Reference<FuPoor>& rpFunction)
     }
 }
 
-std::shared_ptr<controller::Properties> SlideSorter::GetProperties() const
+std::shared_ptr<controller::Properties> const & SlideSorter::GetProperties() const
 {
     OSL_ASSERT(mpProperties);
     return mpProperties;
 }
 
-std::shared_ptr<view::Theme> SlideSorter::GetTheme() const
+std::shared_ptr<view::Theme> const & SlideSorter::GetTheme() const
 {
     OSL_ASSERT(mpTheme);
     return mpTheme;
diff --git a/sd/source/ui/slidesorter/view/SlideSorterView.cxx b/sd/source/ui/slidesorter/view/SlideSorterView.cxx
index 2abafe28dcc1..c5b75a26ea4d 100644
--- a/sd/source/ui/slidesorter/view/SlideSorterView.cxx
+++ b/sd/source/ui/slidesorter/view/SlideSorterView.cxx
@@ -689,7 +689,7 @@ void SlideSorterView::ConfigurationChanged (
 
 }
 
-std::shared_ptr<cache::PageCache> SlideSorterView::GetPreviewCache()
+std::shared_ptr<cache::PageCache> const & SlideSorterView::GetPreviewCache()
 {
     sd::Window *pWindow (mrSlideSorter.GetContentWindow());
     if (pWindow && mpPreviewCache.get() == nullptr)
@@ -704,7 +704,7 @@ std::shared_ptr<cache::PageCache> SlideSorterView::GetPreviewCache()
     return mpPreviewCache;
 }
 
-Pair SlideSorterView::GetVisiblePageRange()
+Pair const & SlideSorterView::GetVisiblePageRange()
 {
     if ( ! mbPageObjectVisibilitiesValid)
         DeterminePageObjectVisibilities();
@@ -827,7 +827,7 @@ bool SlideSorterView::SetState (
     return bModified;
 }
 
-std::shared_ptr<PageObjectPainter> SlideSorterView::GetPageObjectPainter()
+std::shared_ptr<PageObjectPainter> const & SlideSorterView::GetPageObjectPainter()
 {
     if ( ! mpPageObjectPainter)
         mpPageObjectPainter.reset(new PageObjectPainter(mrSlideSorter));
diff --git a/sd/source/ui/unoidl/facreg.cxx b/sd/source/ui/unoidl/facreg.cxx
index 2473fecffc69..7493fcafa0d9 100644
--- a/sd/source/ui/unoidl/facreg.cxx
+++ b/sd/source/ui/unoidl/facreg.cxx
@@ -47,7 +47,7 @@ typedef std::unordered_map<OUString, FactoryId, OUStringHash> FactoryMap;
 
 namespace {
 static std::shared_ptr<FactoryMap> spFactoryMap;
-std::shared_ptr<FactoryMap> GetFactoryMap()
+std::shared_ptr<FactoryMap> const & GetFactoryMap()
 {
     if (spFactoryMap.get() == nullptr)
     {
diff --git a/sdext/source/presenter/PresenterAccessibility.cxx b/sdext/source/presenter/PresenterAccessibility.cxx
index a340509ce5fc..fd26f801ad64 100644
--- a/sdext/source/presenter/PresenterAccessibility.cxx
+++ b/sdext/source/presenter/PresenterAccessibility.cxx
@@ -509,7 +509,7 @@ private:
 class AccessibleFocusManager
 {
 public:
-    static std::shared_ptr<AccessibleFocusManager> Instance();
+    static std::shared_ptr<AccessibleFocusManager> const & Instance();
 
     void AddFocusableObject (const ::rtl::Reference<PresenterAccessible::AccessibleObject>& rpObject);
     void RemoveFocusableObject (const ::rtl::Reference<PresenterAccessible::AccessibleObject>& rpObject);
@@ -1990,7 +1990,7 @@ void AccessibleNotes::HandleTextChange()
 
 std::shared_ptr<AccessibleFocusManager> AccessibleFocusManager::mpInstance;
 
-std::shared_ptr<AccessibleFocusManager> AccessibleFocusManager::Instance()
+std::shared_ptr<AccessibleFocusManager> const & AccessibleFocusManager::Instance()
 {
     if ( ! mpInstance)
     {
diff --git a/sdext/source/presenter/PresenterBitmapContainer.cxx b/sdext/source/presenter/PresenterBitmapContainer.cxx
index 84ea7d47a0f4..ea39f17e2588 100644
--- a/sdext/source/presenter/PresenterBitmapContainer.cxx
+++ b/sdext/source/presenter/PresenterBitmapContainer.cxx
@@ -342,7 +342,7 @@ const css::uno::Reference<css::rendering::XBitmap>&
     return mxNormalBitmap;
 }
 
-css::uno::Reference<css::rendering::XBitmap>
+css::uno::Reference<css::rendering::XBitmap> const &
     PresenterBitmapContainer::BitmapDescriptor::GetBitmap(const Mode eMode) const
 {
     switch (eMode)
diff --git a/sdext/source/presenter/PresenterBitmapContainer.hxx b/sdext/source/presenter/PresenterBitmapContainer.hxx
index f0877339dc44..e3acea1b4cdc 100644
--- a/sdext/source/presenter/PresenterBitmapContainer.hxx
+++ b/sdext/source/presenter/PresenterBitmapContainer.hxx
@@ -52,7 +52,7 @@ public:
 
         enum Mode {Normal, MouseOver, ButtonDown, Disabled, Mask};
         const css::uno::Reference<css::rendering::XBitmap>& GetNormalBitmap() const;
-        css::uno::Reference<css::rendering::XBitmap> GetBitmap(const Mode eMode) const;
+        css::uno::Reference<css::rendering::XBitmap> const & GetBitmap(const Mode eMode) const;
         void SetBitmap (
             const Mode eMode,
             const css::uno::Reference<css::rendering::XBitmap>& rxBitmap);
diff --git a/sdext/source/presenter/PresenterButton.cxx b/sdext/source/presenter/PresenterButton.cxx
index de2d758e700f..fc787724efef 100644
--- a/sdext/source/presenter/PresenterButton.cxx
+++ b/sdext/source/presenter/PresenterButton.cxx
@@ -221,7 +221,7 @@ void PresenterButton::SetCanvas (
     }
 }
 
-css::geometry::IntegerSize2D PresenterButton::GetSize()
+css::geometry::IntegerSize2D const & PresenterButton::GetSize()
 {
     if (maButtonSize.Width < 0)
         CalculateButtonSize();
diff --git a/sdext/source/presenter/PresenterButton.hxx b/sdext/source/presenter/PresenterButton.hxx
index 4421c3739445..0f5bd77bf75b 100644
--- a/sdext/source/presenter/PresenterButton.hxx
+++ b/sdext/source/presenter/PresenterButton.hxx
@@ -72,7 +72,7 @@ public:
     void SetCanvas (
         const css::uno::Reference<css::rendering::XCanvas>& rxParentCanvas,
         const css::uno::Reference<css::awt::XWindow>& rxParentWindow);
-    css::geometry::IntegerSize2D GetSize();
+    css::geometry::IntegerSize2D const & GetSize();
 
     // XWindowListener
 
diff --git a/sdext/source/presenter/PresenterScrollBar.cxx b/sdext/source/presenter/PresenterScrollBar.cxx
index 3ea396653426..ead527a0a0ea 100644
--- a/sdext/source/presenter/PresenterScrollBar.cxx
+++ b/sdext/source/presenter/PresenterScrollBar.cxx
@@ -447,7 +447,7 @@ void SAL_CALL PresenterScrollBar::disposing (const css::lang::EventObject& rEven
 }
 
 
-geometry::RealRectangle2D PresenterScrollBar::GetRectangle (const Area eArea) const
+geometry::RealRectangle2D const & PresenterScrollBar::GetRectangle (const Area eArea) const
 {
     OSL_ASSERT(eArea>=0 && eArea<AreaCount);
 
diff --git a/sdext/source/presenter/PresenterScrollBar.hxx b/sdext/source/presenter/PresenterScrollBar.hxx
index 73ccbfabc1c4..9e0f0183a98f 100644
--- a/sdext/source/presenter/PresenterScrollBar.hxx
+++ b/sdext/source/presenter/PresenterScrollBar.hxx
@@ -186,7 +186,7 @@ protected:
     SharedBitmapDescriptor mpThumbEndDescriptor;
     bool maEnabledState[AreaCount];
 
-    css::geometry::RealRectangle2D GetRectangle (const Area eArea) const;
+    css::geometry::RealRectangle2D const & GetRectangle (const Area eArea) const;
     virtual double GetDragDistance (const sal_Int32 nX, const sal_Int32 nY) const = 0;
     virtual void UpdateDragAnchor (const double nDragDistance) = 0;
     virtual double GetMinor (const double nX, const double nY) const = 0;
diff --git a/sdext/source/presenter/PresenterToolBar.cxx b/sdext/source/presenter/PresenterToolBar.cxx
index 2f298b28450a..0fe71c460d1e 100644
--- a/sdext/source/presenter/PresenterToolBar.cxx
+++ b/sdext/source/presenter/PresenterToolBar.cxx
@@ -150,7 +150,7 @@ namespace {
         virtual void Paint (
             const Reference<rendering::XCanvas>& rxCanvas,
             const rendering::ViewState& rViewState) = 0;
-        awt::Size GetBoundingSize (
+        awt::Size const & GetBoundingSize (
             const Reference<rendering::XCanvas>& rxCanvas);
         awt::Rectangle GetBoundingBox() const;
         virtual bool SetState (const bool bIsOver, const bool bIsPressed);
@@ -474,7 +474,7 @@ void PresenterToolBar::RequestLayout()
     xManager->Invalidate(mxWindow);
 }
 
-geometry::RealSize2D PresenterToolBar::GetMinimalSize()
+geometry::RealSize2D const & PresenterToolBar::GetMinimalSize()
 {
     if (mbIsLayoutPending)
         Layout(mxCanvas);
@@ -1244,7 +1244,7 @@ void Element::disposing()
 {
 }
 
-awt::Size Element::GetBoundingSize (
+awt::Size const & Element::GetBoundingSize (
     const Reference<rendering::XCanvas>& rxCanvas)
 {
     maSize = CreateBoundingSize(rxCanvas);
diff --git a/sdext/source/presenter/PresenterToolBar.hxx b/sdext/source/presenter/PresenterToolBar.hxx
index f4201a1f6939..7bdcc6f0ed77 100644
--- a/sdext/source/presenter/PresenterToolBar.hxx
+++ b/sdext/source/presenter/PresenterToolBar.hxx
@@ -98,7 +98,7 @@ public:
         const bool bSynchronous);
 
     void RequestLayout();
-    css::geometry::RealSize2D GetMinimalSize();
+    css::geometry::RealSize2D const & GetMinimalSize();
     const ::rtl::Reference<PresenterController>& GetPresenterController() const;
     const css::uno::Reference<css::uno::XComponentContext>& GetComponentContext() const;
 
diff --git a/sfx2/inc/guisaveas.hxx b/sfx2/inc/guisaveas.hxx
index 1e516c48d187..5ca7743397d2 100644
--- a/sfx2/inc/guisaveas.hxx
+++ b/sfx2/inc/guisaveas.hxx
@@ -50,9 +50,9 @@ private:
     css::uno::Reference< css::container::XContainerQuery > m_xFilterQuery;
     css::uno::Reference< css::frame::XModuleManager2 >     m_xModuleManager;
 
-    css::uno::Reference< css::container::XNameAccess > GetFilterConfiguration();
-    css::uno::Reference< css::container::XContainerQuery > GetFilterQuery();
-    css::uno::Reference< css::frame::XModuleManager2 > GetModuleManager();
+    css::uno::Reference< css::container::XNameAccess > const & GetFilterConfiguration();
+    css::uno::Reference< css::container::XContainerQuery > const & GetFilterQuery();
+    css::uno::Reference< css::frame::XModuleManager2 > const & GetModuleManager();
 
 public:
     SfxStoringHelper();
diff --git a/sfx2/source/appl/newhelp.cxx b/sfx2/source/appl/newhelp.cxx
index 69d360bb369a..9ff07b002498 100644
--- a/sfx2/source/appl/newhelp.cxx
+++ b/sfx2/source/appl/newhelp.cxx
@@ -2094,7 +2094,7 @@ void SfxHelpTextWindow_Impl::SetOnStartupBoxPosition()
 }
 
 
-Reference< XBreakIterator > SfxHelpTextWindow_Impl::GetBreakIterator()
+Reference< XBreakIterator > const & SfxHelpTextWindow_Impl::GetBreakIterator()
 {
     if ( !xBreakIterator.is() )
         xBreakIterator = vcl::unohelper::CreateBreakIterator();
diff --git a/sfx2/source/appl/newhelp.hxx b/sfx2/source/appl/newhelp.hxx
index d340a8417e82..c23fcb7c58c2 100644
--- a/sfx2/source/appl/newhelp.hxx
+++ b/sfx2/source/appl/newhelp.hxx
@@ -447,7 +447,7 @@ private:
     void                    InitOnStartupBox();
     void                    SetOnStartupBoxPosition();
 
-    css::uno::Reference< css::i18n::XBreakIterator >
+    css::uno::Reference< css::i18n::XBreakIterator > const &
                             GetBreakIterator();
     css::uno::Reference< css::text::XTextRange >
                             getCursor() const;
diff --git a/sfx2/source/appl/sfxhelp.cxx b/sfx2/source/appl/sfxhelp.cxx
index 33121b8fb224..8e10bb7dd8c1 100644
--- a/sfx2/source/appl/sfxhelp.cxx
+++ b/sfx2/source/appl/sfxhelp.cxx
@@ -98,7 +98,7 @@ void NoHelpErrorBox::RequestHelp( const HelpEvent& )
 static bool impl_hasHelpInstalled( const OUString &rLang );
 
 /// Return the locale we prefer for displaying help
-static OUString HelpLocaleString()
+static OUString const & HelpLocaleString()
 {
     static OUString aLocaleStr;
     if (aLocaleStr.isEmpty())
diff --git a/sfx2/source/control/thumbnailviewitem.cxx b/sfx2/source/control/thumbnailviewitem.cxx
index 3690ae020cab..33a5b2d922f1 100644
--- a/sfx2/source/control/thumbnailviewitem.cxx
+++ b/sfx2/source/control/thumbnailviewitem.cxx
@@ -106,7 +106,7 @@ void ThumbnailViewItem::setTitle (const OUString& rTitle)
         maTitle = rTitle;
 }
 
-uno::Reference< accessibility::XAccessible > ThumbnailViewItem::GetAccessible( bool bIsTransientChildrenDisabled )
+uno::Reference< accessibility::XAccessible > const & ThumbnailViewItem::GetAccessible( bool bIsTransientChildrenDisabled )
 {
     if( !mxAcc.is() )
         mxAcc = new ThumbnailViewItemAcc( this, bIsTransientChildrenDisabled );
diff --git a/sfx2/source/doc/DocumentMetadataAccess.cxx b/sfx2/source/doc/DocumentMetadataAccess.cxx
index 6c1813f160ea..23fea7939cec 100644
--- a/sfx2/source/doc/DocumentMetadataAccess.cxx
+++ b/sfx2/source/doc/DocumentMetadataAccess.cxx
@@ -208,7 +208,7 @@ struct DocumentMetadataAccess_Impl
 
 // this is... a hack.
 template<sal_Int16 Constant>
-/*static*/ uno::Reference<rdf::XURI>
+/*static*/ uno::Reference<rdf::XURI> const &
 getURI(uno::Reference< uno::XComponentContext > const & i_xContext)
 {
     static uno::Reference< rdf::XURI > xURI(
diff --git a/sfx2/source/doc/docfile.cxx b/sfx2/source/doc/docfile.cxx
index c4ce8719238c..7e8283b08552 100644
--- a/sfx2/source/doc/docfile.cxx
+++ b/sfx2/source/doc/docfile.cxx
@@ -2645,7 +2645,7 @@ const std::shared_ptr<const SfxFilter>& SfxMedium::GetFilter() const
 }
 
 
-std::shared_ptr<const SfxFilter> SfxMedium::GetOrigFilter() const
+std::shared_ptr<const SfxFilter> const & SfxMedium::GetOrigFilter() const
 {
     return pImpl->pOrigFilter ? pImpl->pOrigFilter : pImpl->m_pFilter;
 }
diff --git a/sfx2/source/doc/doctemplateslocal.cxx b/sfx2/source/doc/doctemplateslocal.cxx
index 1cffac39ee97..cb82f0d24e16 100644
--- a/sfx2/source/doc/doctemplateslocal.cxx
+++ b/sfx2/source/doc/doctemplateslocal.cxx
@@ -123,7 +123,7 @@ DocTemplLocaleHelper::~DocTemplLocaleHelper()
 }
 
 
-std::vector< beans::StringPair > DocTemplLocaleHelper::GetParsingResult()
+std::vector< beans::StringPair > const & DocTemplLocaleHelper::GetParsingResult()
 {
     if ( !m_aElementsSeq.empty() )
         throw uno::RuntimeException(); // the parsing has still not finished!
diff --git a/sfx2/source/doc/doctemplateslocal.hxx b/sfx2/source/doc/doctemplateslocal.hxx
index a98ae0377d7c..3b41fc87a5b4 100644
--- a/sfx2/source/doc/doctemplateslocal.hxx
+++ b/sfx2/source/doc/doctemplateslocal.hxx
@@ -40,7 +40,7 @@ class DocTemplLocaleHelper : public cppu::WeakImplHelper < css::xml::sax::XDocum
     std::vector< OUString > m_aElementsSeq; // stack of elements being parsed
 
     DocTemplLocaleHelper();
-    std::vector< css::beans::StringPair > GetParsingResult();
+    std::vector< css::beans::StringPair > const & GetParsingResult();
 
     static std::vector< css::beans::StringPair > SAL_CALL ReadLocalizationSequence_Impl( const css::uno::Reference< css::io::XInputStream >& xInStream, const OUString& aStringID, const css::uno::Reference< css::uno::XComponentContext >& xContext )
     throw( css::uno::Exception );
diff --git a/sfx2/source/doc/guisaveas.cxx b/sfx2/source/doc/guisaveas.cxx
index 440185028461..9f99eab33a98 100644
--- a/sfx2/source/doc/guisaveas.cxx
+++ b/sfx2/source/doc/guisaveas.cxx
@@ -275,9 +275,9 @@ public:
 
     void FreeDocumentProps();
 
-    uno::Reference< frame::XModel > GetModel();
-    uno::Reference< frame::XStorable > GetStorable();
-    uno::Reference< frame::XStorable2 > GetStorable2();
+    uno::Reference< frame::XModel > const & GetModel();
+    uno::Reference< frame::XStorable > const & GetStorable();
+    uno::Reference< frame::XStorable2 > const & GetStorable2();
 
     ::comphelper::SequenceAsHashMap& GetMediaDescr() { return m_aMediaDescrHM; }
 
@@ -285,7 +285,7 @@ public:
 
     const ::comphelper::SequenceAsHashMap& GetDocProps();
 
-    OUString GetModuleName();
+    OUString const & GetModuleName();
     const ::comphelper::SequenceAsHashMap& GetModuleProps();
 
     void CheckInteractionHandler();
@@ -382,7 +382,7 @@ void ModelData_Impl::FreeDocumentProps()
 }
 
 
-uno::Reference< frame::XModel > ModelData_Impl::GetModel()
+uno::Reference< frame::XModel > const & ModelData_Impl::GetModel()
 {
     if ( !m_xModel.is() )
         throw uno::RuntimeException();
@@ -391,7 +391,7 @@ uno::Reference< frame::XModel > ModelData_Impl::GetModel()
 }
 
 
-uno::Reference< frame::XStorable > ModelData_Impl::GetStorable()
+uno::Reference< frame::XStorable > const & ModelData_Impl::GetStorable()
 {
     if ( !m_xStorable.is() )
     {
@@ -404,7 +404,7 @@ uno::Reference< frame::XStorable > ModelData_Impl::GetStorable()
 }
 
 
-uno::Reference< frame::XStorable2 > ModelData_Impl::GetStorable2()
+uno::Reference< frame::XStorable2 > const & ModelData_Impl::GetStorable2()
 {
     if ( !m_xStorable2.is() )
     {
@@ -426,7 +426,7 @@ const ::comphelper::SequenceAsHashMap& ModelData_Impl::GetDocProps()
 }
 
 
-OUString ModelData_Impl::GetModuleName()
+OUString const & ModelData_Impl::GetModuleName()
 {
     if ( m_aModuleName.isEmpty() )
     {
@@ -1265,7 +1265,7 @@ SfxStoringHelper::SfxStoringHelper()
 }
 
 
-uno::Reference< container::XNameAccess > SfxStoringHelper::GetFilterConfiguration()
+uno::Reference< container::XNameAccess > const & SfxStoringHelper::GetFilterConfiguration()
 {
     if ( !m_xFilterCFG.is() )
     {
@@ -1280,7 +1280,7 @@ uno::Reference< container::XNameAccess > SfxStoringHelper::GetFilterConfiguratio
 }
 
 
-uno::Reference< container::XContainerQuery > SfxStoringHelper::GetFilterQuery()
+uno::Reference< container::XContainerQuery > const & SfxStoringHelper::GetFilterQuery()
 {
     if ( !m_xFilterQuery.is() )
     {
@@ -1293,7 +1293,7 @@ uno::Reference< container::XContainerQuery > SfxStoringHelper::GetFilterQuery()
 }
 
 
-uno::Reference< css::frame::XModuleManager2 > SfxStoringHelper::GetModuleManager()
+uno::Reference< css::frame::XModuleManager2 > const & SfxStoringHelper::GetModuleManager()
 {
     if ( !m_xModuleManager.is() )
     {
diff --git a/sfx2/source/doc/sfxbasemodel.cxx b/sfx2/source/doc/sfxbasemodel.cxx
index ab6d33354131..17c8411d462a 100644
--- a/sfx2/source/doc/sfxbasemodel.cxx
+++ b/sfx2/source/doc/sfxbasemodel.cxx
@@ -3410,7 +3410,7 @@ Reference< script::provider::XScriptProvider > SAL_CALL SfxBaseModel::getScriptP
 //  XUIConfigurationManagerSupplier
 
 
-OUString SfxBaseModel::getRuntimeUID() const
+OUString const & SfxBaseModel::getRuntimeUID() const
 {
     OSL_ENSURE( !m_pData->m_sRuntimeUID.isEmpty(),
                 "SfxBaseModel::getRuntimeUID - ID is empty!" );
diff --git a/slideshow/source/engine/shapes/drawshape.cxx b/slideshow/source/engine/shapes/drawshape.cxx
index ad9212e1d3e9..877049b0b5ae 100644
--- a/slideshow/source/engine/shapes/drawshape.cxx
+++ b/slideshow/source/engine/shapes/drawshape.cxx
@@ -77,7 +77,7 @@ namespace slideshow
         // Private methods
 
 
-        GDIMetaFileSharedPtr DrawShape::forceScrollTextMetaFile()
+        GDIMetaFileSharedPtr const & DrawShape::forceScrollTextMetaFile()
         {
             if ((mnCurrMtfLoadFlags & MTF_LOAD_SCROLL_TEXT_MTF) != MTF_LOAD_SCROLL_TEXT_MTF)
             {
diff --git a/slideshow/source/engine/shapes/drawshape.hxx b/slideshow/source/engine/shapes/drawshape.hxx
index a0d98b1c9001..328d0c3bd3a4 100644
--- a/slideshow/source/engine/shapes/drawshape.hxx
+++ b/slideshow/source/engine/shapes/drawshape.hxx
@@ -199,7 +199,7 @@ namespace slideshow
                 crafted metafile, usable to display drawing layer text
                 animations.
             */
-            GDIMetaFileSharedPtr forceScrollTextMetaFile();
+            GDIMetaFileSharedPtr const & forceScrollTextMetaFile();
 
         private:
             /** Create a shape for the given XShape
diff --git a/slideshow/source/engine/shapesubset.cxx b/slideshow/source/engine/shapesubset.cxx
index 5a20d3e9d194..23fd8099e829 100644
--- a/slideshow/source/engine/shapesubset.cxx
+++ b/slideshow/source/engine/shapesubset.cxx
@@ -88,7 +88,7 @@ namespace slideshow
             }
         }
 
-        AttributableShapeSharedPtr ShapeSubset::getSubsetShape() const
+        AttributableShapeSharedPtr const & ShapeSubset::getSubsetShape() const
         {
             return mpSubsetShape ? mpSubsetShape : mpOriginalShape;
         }
diff --git a/slideshow/source/inc/shapesubset.hxx b/slideshow/source/inc/shapesubset.hxx
index 68514759de2a..7f0a8a747148 100644
--- a/slideshow/source/inc/shapesubset.hxx
+++ b/slideshow/source/inc/shapesubset.hxx
@@ -96,7 +96,7 @@ namespace slideshow
                 If the subset is currently revoked, this method
                 returns the original shape.
              */
-            AttributableShapeSharedPtr  getSubsetShape() const;
+            AttributableShapeSharedPtr const &  getSubsetShape() const;
 
             /** Enable the subset shape.
 
diff --git a/starmath/inc/document.hxx b/starmath/inc/document.hxx
index fcf1c200f7af..fa370de600f2 100644
--- a/starmath/inc/document.hxx
+++ b/starmath/inc/document.hxx
@@ -182,7 +182,7 @@ public:
 
     const std::set< OUString > &    GetUsedSymbols() const  { return maUsedSymbols; }
 
-    OUString        GetAccessibleText();
+    OUString const & GetAccessibleText();
 
     EditEngine &    GetEditEngine();
     SfxItemPool &   GetEditEngineItemPool();
diff --git a/starmath/source/document.cxx b/starmath/source/document.cxx
index 3bbda764b41c..1a984526dbdc 100644
--- a/starmath/source/document.cxx
+++ b/starmath/source/document.cxx
@@ -213,7 +213,7 @@ void SmDocShell::SetFormat(SmFormat& rFormat)
     }
 }
 
-OUString SmDocShell::GetAccessibleText()
+OUString const & SmDocShell::GetAccessibleText()
 {
     ArrangeFormula();
     if (maAccText.isEmpty())
diff --git a/stoc/source/servicemanager/servicemanager.cxx b/stoc/source/servicemanager/servicemanager.cxx
index 283facc5f3e3..8aa9fed302a4 100644
--- a/stoc/source/servicemanager/servicemanager.cxx
+++ b/stoc/source/servicemanager/servicemanager.cxx
@@ -496,7 +496,7 @@ class OServiceManagerWrapper : public OServiceManagerMutex, public t_OServiceMan
 {
     Reference< XComponentContext > m_xContext;
     Reference< XMultiComponentFactory > m_root;
-    inline Reference< XMultiComponentFactory > getRoot()
+    Reference< XMultiComponentFactory > const & getRoot()
     {
         if (! m_root.is())
         {
diff --git a/svl/source/inc/passwordcontainer.hxx b/svl/source/inc/passwordcontainer.hxx
index d87d08acecf3..ef637b747d40 100644
--- a/svl/source/inc/passwordcontainer.hxx
+++ b/svl/source/inc/passwordcontainer.hxx
@@ -260,7 +260,7 @@ css::task::UrlRecord find(
                     css::task::PasswordRequestMode aRMode,
                     const css::uno::Reference< css::task::XInteractionHandler >& xHandler );
 
-    OUString GetMasterPassword( const css::uno::Reference< css::task::XInteractionHandler >& Handler )
+    OUString const & GetMasterPassword( const css::uno::Reference< css::task::XInteractionHandler >& Handler )
                                                         throw(css::uno::RuntimeException, std::exception);
 
     void UpdateVector( const OUString& url, ::std::list< NamePassRecord >& toUpdate, NamePassRecord& rec, bool writeFile )
diff --git a/svl/source/items/itemprop.cxx b/svl/source/items/itemprop.cxx
index 69f78e5ac19f..5e2a7279e1e4 100644
--- a/svl/source/items/itemprop.cxx
+++ b/svl/source/items/itemprop.cxx
@@ -311,7 +311,7 @@ PropertyState   SfxItemPropertySet::getPropertyState(const OUString& rName, cons
     return eRet;
 }
 
-Reference<XPropertySetInfo> SfxItemPropertySet::getPropertySetInfo() const
+Reference<XPropertySetInfo> const & SfxItemPropertySet::getPropertySetInfo() const
 {
     if( !m_xInfo.is() )
         m_xInfo = new SfxItemPropertySetInfo( m_aMap );
diff --git a/svl/source/items/style.cxx b/svl/source/items/style.cxx
index aed9c530431d..1c04d7bf4bc8 100644
--- a/svl/source/items/style.cxx
+++ b/svl/source/items/style.cxx
@@ -192,7 +192,7 @@ bool SfxStyleSheetBase::SetName(const OUString& rName, bool bReIndexNow)
     return true;
 }
 
-OUString SfxStyleSheetBase::GetDisplayName() const
+OUString const & SfxStyleSheetBase::GetDisplayName() const
 {
     if( maDisplayName.isEmpty() )
     {
diff --git a/svl/source/passwordcontainer/passwordcontainer.cxx b/svl/source/passwordcontainer/passwordcontainer.cxx
index 93d627c16177..3971ed06d06d 100644
--- a/svl/source/passwordcontainer/passwordcontainer.cxx
+++ b/svl/source/passwordcontainer/passwordcontainer.cxx
@@ -818,7 +818,7 @@ OUString PasswordContainer::RequestPasswordFromUser( PasswordRequestMode aRMode,
 }
 
 
-OUString PasswordContainer::GetMasterPassword( const Reference< XInteractionHandler >& aHandler ) throw(RuntimeException, std::exception)
+OUString const & PasswordContainer::GetMasterPassword( const Reference< XInteractionHandler >& aHandler ) throw(RuntimeException, std::exception)
 {
     PasswordRequestMode aRMode = PasswordRequestMode_PASSWORD_ENTER;
     if( !m_pStorageFile || !m_pStorageFile->useStorage() )
diff --git a/svtools/source/config/menuoptions.cxx b/svtools/source/config/menuoptions.cxx
index c0fcaefb0491..d947d6ca6dd3 100644
--- a/svtools/source/config/menuoptions.cxx
+++ b/svtools/source/config/menuoptions.cxx
@@ -125,7 +125,7 @@ class SvtMenuOptions_Impl : public ConfigItem
             @return     A list of needed configuration keys is returned.
         *//*-*****************************************************************************************************/
 
-        static Sequence< OUString > impl_GetPropertyNames();
+        static Sequence< OUString > const & impl_GetPropertyNames();
 };
 
 //  constructor
@@ -299,7 +299,7 @@ void SvtMenuOptions_Impl::ImplCommit()
 
 //  private method
 
-Sequence< OUString > SvtMenuOptions_Impl::impl_GetPropertyNames()
+Sequence< OUString > const & SvtMenuOptions_Impl::impl_GetPropertyNames()
 {
     // Build static list of configuration key names.
     static const OUString pProperties[] =
diff --git a/svtools/source/control/fmtfield.cxx b/svtools/source/control/fmtfield.cxx
index b92e52d171dc..deb22cda6b9b 100644
--- a/svtools/source/control/fmtfield.cxx
+++ b/svtools/source/control/fmtfield.cxx
@@ -405,7 +405,7 @@ void FormattedField::SetTextFormatted(const OUString& rStr)
     m_ValueState = valueString;
 }
 
-OUString FormattedField::GetTextValue() const
+OUString const & FormattedField::GetTextValue() const
 {
     if (m_ValueState != valueString )
     {
diff --git a/svtools/source/control/valueacc.cxx b/svtools/source/control/valueacc.cxx
index 38628ea7e14f..28e849c0f490 100644
--- a/svtools/source/control/valueacc.cxx
+++ b/svtools/source/control/valueacc.cxx
@@ -52,7 +52,7 @@ ValueSetItem::~ValueSetItem()
 }
 
 
-uno::Reference< accessibility::XAccessible > ValueSetItem::GetAccessible( bool bIsTransientChildrenDisabled )
+uno::Reference< accessibility::XAccessible > const & ValueSetItem::GetAccessible( bool bIsTransientChildrenDisabled )
 {
     if( !mxAcc.is() )
         mxAcc = new ValueItemAcc( this, bIsTransientChildrenDisabled );
diff --git a/svtools/source/control/valueimp.hxx b/svtools/source/control/valueimp.hxx
index c3d2339181de..53b13a05b38e 100644
--- a/svtools/source/control/valueimp.hxx
+++ b/svtools/source/control/valueimp.hxx
@@ -64,7 +64,7 @@ struct ValueSetItem
     explicit ValueSetItem( ValueSet& rParent );
     ~ValueSetItem();
 
-    css::uno::Reference< css::accessibility::XAccessible >
+    css::uno::Reference< css::accessibility::XAccessible > const &
                         GetAccessible( bool bIsTransientChildrenDisabled );
 };
 
diff --git a/svtools/source/misc/sampletext.cxx b/svtools/source/misc/sampletext.cxx
index 59bee404c571..2cbb18345073 100644
--- a/svtools/source/misc/sampletext.cxx
+++ b/svtools/source/misc/sampletext.cxx
@@ -1107,28 +1107,28 @@ namespace
     }
 
     //false for all bits considered "Latin" by LibreOffice
-    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> getLatinMask()
+    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> const & getLatinMask()
     {
         static std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> s_Mask(getMaskByScriptType(css::i18n::ScriptType::LATIN));
         return s_Mask;
     }
 
     //false for all bits considered "Asian" by LibreOffice
-    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> getCJKMask()
+    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> const & getCJKMask()
     {
         static std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> s_Mask(getMaskByScriptType(css::i18n::ScriptType::ASIAN));
         return s_Mask;
     }
 
     //false for all bits considered "Complex" by LibreOffice
-    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> getCTLMask()
+    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> const & getCTLMask()
     {
         static std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> s_Mask(getMaskByScriptType(css::i18n::ScriptType::COMPLEX));
         return s_Mask;
     }
 
     //false for all bits considered "WEAK" by LibreOffice
-    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> getWeakMask()
+    std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> const & getWeakMask()
     {
         static std::bitset<vcl::UnicodeCoverage::MAX_UC_ENUM> s_Mask(getMaskByScriptType(css::i18n::ScriptType::WEAK));
         return s_Mask;
diff --git a/svx/inc/sdr/contact/viewobjectcontactofe3d.hxx b/svx/inc/sdr/contact/viewobjectcontactofe3d.hxx
index aa58d2f19d59..ac573bf2271f 100644
--- a/svx/inc/sdr/contact/viewobjectcontactofe3d.hxx
+++ b/svx/inc/sdr/contact/viewobjectcontactofe3d.hxx
@@ -57,7 +57,7 @@ namespace sdr
             // access to the local primitive sequence. This will ensure that the list is
             // current in comparing the local list content with a fresh created incarnation
             // This method will not handle included hierarchies or visibility.
-            drawinglayer::primitive3d::Primitive3DContainer getPrimitive3DContainer(const DisplayInfo& rDisplayInfo) const;
+            drawinglayer::primitive3d::Primitive3DContainer const & getPrimitive3DContainer(const DisplayInfo& rDisplayInfo) const;
         };
     } // end of namespace contact
 } // end of namespace sdr
diff --git a/svx/source/accessibility/charmapacc.cxx b/svx/source/accessibility/charmapacc.cxx
index e8d6e054f31f..076179960179 100644
--- a/svx/source/accessibility/charmapacc.cxx
+++ b/svx/source/accessibility/charmapacc.cxx
@@ -241,7 +241,7 @@ SvxShowCharSetItem::~SvxShowCharSetItem()
 }
 
 
-uno::Reference< css::accessibility::XAccessible > SvxShowCharSetItem::GetAccessible()
+uno::Reference< css::accessibility::XAccessible > const & SvxShowCharSetItem::GetAccessible()
 {
     if( !m_xAcc.is() )
     {
diff --git a/svx/source/accessibility/svxpixelctlaccessiblecontext.cxx b/svx/source/accessibility/svxpixelctlaccessiblecontext.cxx
index a8aab198cee6..4aa8168f91a2 100644
--- a/svx/source/accessibility/svxpixelctlaccessiblecontext.cxx
+++ b/svx/source/accessibility/svxpixelctlaccessiblecontext.cxx
@@ -830,7 +830,7 @@ Rectangle SvxPixelCtlAccessibleChild::GetBoundingBoxOnScreen() throw( RuntimeExc
     return Rectangle( mrParentWindow.OutputToAbsoluteScreenPixel( aRect.TopLeft() ), aRect.GetSize() );
 }
 
-Rectangle SvxPixelCtlAccessibleChild::GetBoundingBox() throw( RuntimeException )
+Rectangle const & SvxPixelCtlAccessibleChild::GetBoundingBox() throw( RuntimeException )
 {
     // no guard necessary, because no one changes mpBoundingBox after creating it
     ThrowExceptionIfNotAlive();
diff --git a/svx/source/accessibility/svxrectctaccessiblecontext.cxx b/svx/source/accessibility/svxrectctaccessiblecontext.cxx
index de5775bf883c..ea1404d35bcc 100644
--- a/svx/source/accessibility/svxrectctaccessiblecontext.cxx
+++ b/svx/source/accessibility/svxrectctaccessiblecontext.cxx
@@ -1073,7 +1073,7 @@ Rectangle SvxRectCtlChildAccessibleContext::GetBoundingBoxOnScreen() throw( Runt
     return Rectangle( mrParentWindow.OutputToScreenPixel( aRect.TopLeft() ), aRect.GetSize() );
 }
 
-Rectangle SvxRectCtlChildAccessibleContext::GetBoundingBox() throw( RuntimeException )
+Rectangle const & SvxRectCtlChildAccessibleContext::GetBoundingBox() throw( RuntimeException )
 {
     // no guard necessary, because no one changes mpBoundingBox after creating it
     ThrowExceptionIfNotAlive();
diff --git a/svx/source/customshapes/EnhancedCustomShapeFontWork.cxx b/svx/source/customshapes/EnhancedCustomShapeFontWork.cxx
index 6bc1e254a9b7..89f1d6f2413a 100644
--- a/svx/source/customshapes/EnhancedCustomShapeFontWork.cxx
+++ b/svx/source/customshapes/EnhancedCustomShapeFontWork.cxx
@@ -833,7 +833,7 @@ SdrObject* CreateSdrObjectFromParagraphOutlines( const FWData& rFWData, const Sd
 
 Reference < i18n::XBreakIterator > EnhancedCustomShapeFontWork::mxBreakIterator = nullptr;
 
-Reference < i18n::XBreakIterator > EnhancedCustomShapeFontWork::GetBreakIterator()
+Reference < i18n::XBreakIterator > const & EnhancedCustomShapeFontWork::GetBreakIterator()
 {
     if ( !mxBreakIterator.is() )
     {
diff --git a/svx/source/customshapes/EnhancedCustomShapeFontWork.hxx b/svx/source/customshapes/EnhancedCustomShapeFontWork.hxx
index 5e0baeae7fc5..d86388cb75fc 100644
--- a/svx/source/customshapes/EnhancedCustomShapeFontWork.hxx
+++ b/svx/source/customshapes/EnhancedCustomShapeFontWork.hxx
@@ -29,7 +29,7 @@ class EnhancedCustomShapeFontWork
 
     public:
 
-        static css::uno::Reference < css::i18n::XBreakIterator > GetBreakIterator();
+        static css::uno::Reference < css::i18n::XBreakIterator > const & GetBreakIterator();
         static SdrObject* CreateFontWork( const SdrObject* pShape2d, const SdrObject* pCustomShape );
 };
 
diff --git a/svx/source/dialog/rubydialog.cxx b/svx/source/dialog/rubydialog.cxx
index 3335316bfa21..c52cdfbbc5a2 100644
--- a/svx/source/dialog/rubydialog.cxx
+++ b/svx/source/dialog/rubydialog.cxx
@@ -99,7 +99,7 @@ public:
     virtual ~SvxRubyData_Impl();
 
     void SetController(const Reference<XController>& xCtrl);
-    Reference<XModel> GetModel()
+    Reference<XModel> const & GetModel()
     {
         if (!xController.is())
             xModel = nullptr;
@@ -111,7 +111,7 @@ public:
     {
         return bHasSelectionChanged;
     }
-    Reference<XRubySelection> GetRubySelection()
+    Reference<XRubySelection> const & GetRubySelection()
     {
         xSelection.set(xController, UNO_QUERY);
         return xSelection;
diff --git a/svx/source/form/formcontroller.cxx b/svx/source/form/formcontroller.cxx
index 1ace5b93fe11..e16e6008a4a7 100644
--- a/svx/source/form/formcontroller.cxx
+++ b/svx/source/form/formcontroller.cxx
@@ -688,7 +688,7 @@ void SAL_CALL FormController::resetted(const EventObject& rEvent) throw( Runtime
 }
 
 
-Sequence< OUString> FormController::getSupportedServiceNames_Static()
+Sequence< OUString> const & FormController::getSupportedServiceNames_Static()
 {
     static Sequence< OUString> aServices;
     if (!aServices.getLength())
diff --git a/svx/source/inc/charmapacc.hxx b/svx/source/inc/charmapacc.hxx
index 2169e9688452..02260bd3c1a2 100644
--- a/svx/source/inc/charmapacc.hxx
+++ b/svx/source/inc/charmapacc.hxx
@@ -108,8 +108,8 @@ namespace svx
         SvxShowCharSetItem( SvxShowCharSet& rParent,SvxShowCharSetAcc*  _pParent,sal_uInt16 _nPos );
         ~SvxShowCharSetItem();
 
-        css::uno::Reference< css::accessibility::XAccessible >    GetAccessible();
-         void                                                                                       ClearAccessible();
+        css::uno::Reference< css::accessibility::XAccessible > const &    GetAccessible();
+         void                                                             ClearAccessible();
     };
 
 
diff --git a/svx/source/inc/datanavi.hxx b/svx/source/inc/datanavi.hxx
index 83d44467088b..eda7ac894981 100644
--- a/svx/source/inc/datanavi.hxx
+++ b/svx/source/inc/datanavi.hxx
@@ -161,7 +161,7 @@ namespace svxform
 
         /** convert submission replace string from API value to UI value.
             Use 'none' as default. */
-        OUString toUI( const OUString& rStr ) const
+        OUString const & toUI( const OUString& rStr ) const
         {
             if( rStr == m_sDoc_API )
                 return m_sDoc_UI;
@@ -173,7 +173,7 @@ namespace svxform
 
         /** convert submission replace string from UI to API.
             Use 'none' as default. */
-        OUString toAPI( const OUString& rStr ) const
+        OUString const & toAPI( const OUString& rStr ) const
         {
             if( rStr == m_sDoc_UI )
                 return m_sDoc_API;
@@ -209,7 +209,7 @@ namespace svxform
         }
 
         /** convert from API to UI; put is default. */
-        OUString toUI( const OUString& rStr ) const
+        OUString const & toUI( const OUString& rStr ) const
         {
             if( rStr == m_sGet_API )
                 return m_sGet_UI;
@@ -220,7 +220,7 @@ namespace svxform
         }
 
         /** convert from UI to API; put is default */
-        OUString toAPI( const OUString& rStr ) const
+        OUString const & toAPI( const OUString& rStr ) const
         {
             if( rStr == m_sGet_UI )
                 return m_sGet_API;
diff --git a/svx/source/inc/formcontroller.hxx b/svx/source/inc/formcontroller.hxx
index 6db2813a6961..e93160e94172 100644
--- a/svx/source/inc/formcontroller.hxx
+++ b/svx/source/inc/formcontroller.hxx
@@ -406,7 +406,7 @@ namespace svxform
         virtual void SAL_CALL invalidateAllFeatures(  ) throw (css::uno::RuntimeException, std::exception) override;
 
 // method for registration
-        static  css::uno::Sequence< OUString >  getSupportedServiceNames_Static();
+        static  css::uno::Sequence< OUString > const &  getSupportedServiceNames_Static();
 
         // comphelper::OPropertyArrayUsageHelper
         virtual void fillProperties(
diff --git a/svx/source/inc/svxpixelctlaccessiblecontext.hxx b/svx/source/inc/svxpixelctlaccessiblecontext.hxx
index b9a572065967..07d807364eb1 100644
--- a/svx/source/inc/svxpixelctlaccessiblecontext.hxx
+++ b/svx/source/inc/svxpixelctlaccessiblecontext.hxx
@@ -135,7 +135,7 @@ public:
 
     Rectangle GetBoundingBoxOnScreen() throw( css::uno::RuntimeException );
 
-    Rectangle GetBoundingBox() throw( css::uno::RuntimeException );
+    Rectangle const & GetBoundingBox() throw( css::uno::RuntimeException );
 
     /// @returns true if it's disposed or in disposing
     inline bool IsAlive() const;
diff --git a/svx/source/inc/svxrectctaccessiblecontext.hxx b/svx/source/inc/svxrectctaccessiblecontext.hxx
index 2f3d072b3e82..f9dcc099258d 100644
--- a/svx/source/inc/svxrectctaccessiblecontext.hxx
+++ b/svx/source/inc/svxrectctaccessiblecontext.hxx
@@ -427,7 +427,7 @@ public:
 protected:
     Rectangle GetBoundingBoxOnScreen() throw( css::uno::RuntimeException );
 
-    Rectangle GetBoundingBox() throw( css::uno::RuntimeException );
+    Rectangle const & GetBoundingBox() throw( css::uno::RuntimeException );
 
     void CommitChange( const css::accessibility::AccessibleEventObject& rEvent );
 
diff --git a/svx/source/sdr/contact/viewcontact.cxx b/svx/source/sdr/contact/viewcontact.cxx
index 244aead6fb37..c4e5f11b7e3d 100644
--- a/svx/source/sdr/contact/viewcontact.cxx
+++ b/svx/source/sdr/contact/viewcontact.cxx
@@ -233,7 +233,7 @@ drawinglayer::primitive2d::Primitive2DContainer ViewContact::createViewIndepende
     return drawinglayer::primitive2d::Primitive2DContainer { xReference };
 }
 
-drawinglayer::primitive2d::Primitive2DContainer ViewContact::getViewIndependentPrimitive2DSequence() const
+drawinglayer::primitive2d::Primitive2DContainer const & ViewContact::getViewIndependentPrimitive2DSequence() const
 {
     // local up-to-date checks. Create new list and compare.
     drawinglayer::primitive2d::Primitive2DContainer xNew(createViewIndependentPrimitive2DSequence());
diff --git a/svx/source/sdr/contact/viewcontactofe3d.cxx b/svx/source/sdr/contact/viewcontactofe3d.cxx
index 9bbb61a6f1a2..253bdea07f30 100644
--- a/svx/source/sdr/contact/viewcontactofe3d.cxx
+++ b/svx/source/sdr/contact/viewcontactofe3d.cxx
@@ -135,7 +135,7 @@ ViewContactOfE3d::~ViewContactOfE3d()
 {
 }
 
-drawinglayer::primitive3d::Primitive3DContainer ViewContactOfE3d::getVIP3DSWithoutObjectTransform() const
+drawinglayer::primitive3d::Primitive3DContainer const & ViewContactOfE3d::getVIP3DSWithoutObjectTransform() const
 {
     // local up-to-date checks. Create new list and compare.
     drawinglayer::primitive3d::Primitive3DContainer xNew(createViewIndependentPrimitive3DContainer());
diff --git a/svx/source/sdr/contact/viewobjectcontact.cxx b/svx/source/sdr/contact/viewobjectcontact.cxx
index 03fbd573e82c..029abbcfae02 100644
--- a/svx/source/sdr/contact/viewobjectcontact.cxx
+++ b/svx/source/sdr/contact/viewobjectcontact.cxx
@@ -359,7 +359,7 @@ drawinglayer::primitive2d::Primitive2DContainer ViewObjectContact::createPrimiti
     return xRetval;
 }
 
-drawinglayer::primitive2d::Primitive2DContainer ViewObjectContact::getPrimitive2DSequence(const DisplayInfo& rDisplayInfo) const
+drawinglayer::primitive2d::Primitive2DContainer const & ViewObjectContact::getPrimitive2DSequence(const DisplayInfo& rDisplayInfo) const
 {
     drawinglayer::primitive2d::Primitive2DContainer xNewPrimitiveSequence;
 
diff --git a/svx/source/sdr/contact/viewobjectcontactofe3d.cxx b/svx/source/sdr/contact/viewobjectcontactofe3d.cxx
index 896a56a600a5..93cf40845dd3 100644
--- a/svx/source/sdr/contact/viewobjectcontactofe3d.cxx
+++ b/svx/source/sdr/contact/viewobjectcontactofe3d.cxx
@@ -72,7 +72,7 @@ namespace sdr
             return rViewContact.impCreateWithGivenPrimitive3DContainer(getPrimitive3DContainer(rDisplayInfo));
         }
 
-        drawinglayer::primitive3d::Primitive3DContainer ViewObjectContactOfE3d::getPrimitive3DContainer(const DisplayInfo& rDisplayInfo) const
+        drawinglayer::primitive3d::Primitive3DContainer const & ViewObjectContactOfE3d::getPrimitive3DContainer(const DisplayInfo& rDisplayInfo) const
         {
             drawinglayer::primitive3d::Primitive3DContainer xNewPrimitive3DSeq(createPrimitive3DContainer(rDisplayInfo));
 
diff --git a/svx/source/sdr/overlay/overlaymanager.cxx b/svx/source/sdr/overlay/overlaymanager.cxx
index 747a727f9cbe..043d4cacc9d5 100644
--- a/svx/source/sdr/overlay/overlaymanager.cxx
+++ b/svx/source/sdr/overlay/overlaymanager.cxx
@@ -145,7 +145,7 @@ namespace sdr
             return rtl::Reference<OverlayManager>(new OverlayManager(rOutputDevice));
         }
 
-        const drawinglayer::geometry::ViewInformation2D OverlayManager::getCurrentViewInformation2D() const
+        drawinglayer::geometry::ViewInformation2D const & OverlayManager::getCurrentViewInformation2D() const
         {
             if(getOutputDevice().GetViewTransformation() != maViewTransformation)
             {
diff --git a/svx/source/svdraw/sdrpaintwindow.cxx b/svx/source/svdraw/sdrpaintwindow.cxx
index 473da51f4508..c014ea9fc687 100644
--- a/svx/source/svdraw/sdrpaintwindow.cxx
+++ b/svx/source/svdraw/sdrpaintwindow.cxx
@@ -253,7 +253,7 @@ SdrPaintWindow::~SdrPaintWindow()
     DestroyPreRenderDevice();
 }
 
-rtl::Reference< sdr::overlay::OverlayManager > SdrPaintWindow::GetOverlayManager() const
+rtl::Reference< sdr::overlay::OverlayManager > const & SdrPaintWindow::GetOverlayManager() const
 {
     if(!mxOverlayManager.is())
     {
diff --git a/svx/source/svdraw/svdmodel.cxx b/svx/source/svdraw/svdmodel.cxx
index 8d970297d779..240abf8bd0b3 100644
--- a/svx/source/svdraw/svdmodel.cxx
+++ b/svx/source/svdraw/svdmodel.cxx
@@ -1759,7 +1759,7 @@ void SdrModel::SetStarDrawPreviewMode(bool bPreview)
     }
 }
 
-uno::Reference< uno::XInterface > SdrModel::getUnoModel()
+uno::Reference< uno::XInterface > const & SdrModel::getUnoModel()
 {
     if( !mxUnoModel.is() )
         mxUnoModel = createUnoModel();
diff --git a/svx/source/svdraw/svdoashp.cxx b/svx/source/svdraw/svdoashp.cxx
index 0f4acc0f137e..799e2344a9ab 100644
--- a/svx/source/svdraw/svdoashp.cxx
+++ b/svx/source/svdraw/svdoashp.cxx
@@ -405,7 +405,7 @@ SdrObject* ImpCreateShadowObjectClone(const SdrObject& rOriginal, const SfxItemS
 }
 
 
-Reference< XCustomShapeEngine > SdrObjCustomShape::GetCustomShapeEngine() const
+Reference< XCustomShapeEngine > const & SdrObjCustomShape::GetCustomShapeEngine() const
 {
     if (mxCustomShapeEngine.is())
         return mxCustomShapeEngine;
diff --git a/svx/source/svdraw/svdpage.cxx b/svx/source/svdraw/svdpage.cxx
index e6d961b3a87e..5fdb308b1a74 100644
--- a/svx/source/svdraw/svdpage.cxx
+++ b/svx/source/svdraw/svdpage.cxx
@@ -1669,7 +1669,7 @@ void SdrPage::SetUnoPage(uno::Reference<drawing::XDrawPage> const& xNewPage)
     mxUnoPage = xNewPage;
 }
 
-uno::Reference< uno::XInterface > SdrPage::getUnoPage()
+uno::Reference< uno::XInterface > const & SdrPage::getUnoPage()
 {
     if( !mxUnoPage.is() )
     {
diff --git a/svx/source/xml/xmleohlp.cxx b/svx/source/xml/xmleohlp.cxx
index 82e5ad505567..7067da149f2a 100644
--- a/svx/source/xml/xmleohlp.cxx
+++ b/svx/source/xml/xmleohlp.cxx
@@ -329,7 +329,7 @@ bool SvXMLEmbeddedObjectHelper::ImplGetStorageNames(
     return true;
 }
 
-uno::Reference < embed::XStorage > SvXMLEmbeddedObjectHelper::ImplGetContainerStorage(
+uno::Reference < embed::XStorage > const & SvXMLEmbeddedObjectHelper::ImplGetContainerStorage(
         const OUString& rStorageName )
 {
     DBG_ASSERT( -1 == rStorageName.indexOf( '/' ) &&
diff --git a/svx/source/xoutdev/xtabdash.cxx b/svx/source/xoutdev/xtabdash.cxx
index 52c2209f0a3c..40021aef04d4 100644
--- a/svx/source/xoutdev/xtabdash.cxx
+++ b/svx/source/xoutdev/xtabdash.cxx
@@ -189,7 +189,7 @@ Bitmap XDashList::CreateBitmapForUI( long nIndex )
     return ImpCreateBitmapForXDash(&rDash);
 }
 
-Bitmap XDashList::GetBitmapForUISolidLine() const
+Bitmap const & XDashList::GetBitmapForUISolidLine() const
 {
     if(maBitmapSolidLine.IsEmpty())
     {
@@ -199,7 +199,7 @@ Bitmap XDashList::GetBitmapForUISolidLine() const
     return maBitmapSolidLine;
 }
 
-OUString XDashList::GetStringForUiSolidLine() const
+OUString const & XDashList::GetStringForUiSolidLine() const
 {
     if(maStringSolidLine.isEmpty())
     {
@@ -209,7 +209,7 @@ OUString XDashList::GetStringForUiSolidLine() const
     return maStringSolidLine;
 }
 
-OUString XDashList::GetStringForUiNoLine() const
+OUString const & XDashList::GetStringForUiNoLine() const
 {
     if(maStringNoLine.isEmpty())
     {
diff --git a/sw/inc/authfld.hxx b/sw/inc/authfld.hxx
index 219335120d9b..6cf7a2093d3c 100644
--- a/sw/inc/authfld.hxx
+++ b/sw/inc/authfld.hxx
@@ -36,7 +36,7 @@ public:
     SwAuthEntry( const SwAuthEntry& rCopy );
     bool            operator==(const SwAuthEntry& rComp);
 
-    inline OUString         GetAuthorField(ToxAuthorityField ePos) const;
+    inline OUString const & GetAuthorField(ToxAuthorityField ePos) const;
     inline void             SetAuthorField(ToxAuthorityField ePos,
                                             const OUString& rField);
 
@@ -175,7 +175,7 @@ public:
     virtual OUString GetDescription() const override;
 };
 
-inline OUString SwAuthEntry::GetAuthorField(ToxAuthorityField ePos) const
+inline OUString const & SwAuthEntry::GetAuthorField(ToxAuthorityField ePos) const
 {
     SAL_WARN_IF(AUTH_FIELD_END <= ePos, "sw", "wrong index");
     return aAuthFields[ePos];
diff --git a/sw/inc/breakit.hxx b/sw/inc/breakit.hxx
index 47615f45bc0f..2978f4472ef0 100644
--- a/sw/inc/breakit.hxx
+++ b/sw/inc/breakit.hxx
@@ -63,7 +63,7 @@ public:
 public:
     static SwBreakIt * Get();
 
-    css::uno::Reference< css::i18n::XBreakIterator > GetBreakIter()
+    css::uno::Reference< css::i18n::XBreakIterator > const & GetBreakIter()
     {
         createBreakIterator();
         return xBreak;
diff --git a/sw/inc/dbmgr.hxx b/sw/inc/dbmgr.hxx
index 222e55c07df5..c14f20a2ed96 100644
--- a/sw/inc/dbmgr.hxx
+++ b/sw/inc/dbmgr.hxx
@@ -344,7 +344,7 @@ public:
                             OUString& rResult, double* pNumber);
     /** create and store or find an already stored connection to a data source for use
     in SwFieldMgr and SwDBTreeList */
-    css::uno::Reference< css::sdbc::XConnection>
+    css::uno::Reference< css::sdbc::XConnection> const &
                     RegisterConnection(OUString const& rSource);
 
     void            CreateDSData(const SwDBData& rData)
diff --git a/sw/inc/doc.hxx b/sw/inc/doc.hxx
index cfaefece1ed1..dc96eb0af54d 100644
--- a/sw/inc/doc.hxx
+++ b/sw/inc/doc.hxx
@@ -1606,7 +1606,7 @@ public:
     const css::uno::Reference<css::container::XNameContainer>&
         getXForms() const { return mxXForms;}
 
-    css::uno::Reference< css::linguistic2::XProofreadingIterator > GetGCIterator() const;
+    css::uno::Reference< css::linguistic2::XProofreadingIterator > const & GetGCIterator() const;
 
     // #i31958# is this an XForms document?
     bool isXForms() const;
@@ -1621,7 +1621,7 @@ public:
     void SetDefaultPageMode(bool bSquaredPageMode);
     bool IsSquaredPageMode() const;
 
-    css::uno::Reference< css::script::vba::XVBAEventProcessor > GetVbaEventProcessor();
+    css::uno::Reference< css::script::vba::XVBAEventProcessor > const & GetVbaEventProcessor();
     void SetVBATemplateToProjectCache( css::uno::Reference< css::container::XNameContainer >& xCache ) { m_xTemplateToProjectCache = xCache; };
     const css::uno::Reference< css::container::XNameContainer >& GetVBATemplateToProjectCache() { return m_xTemplateToProjectCache; };
     ::sfx2::IXmlIdRegistry& GetXmlIdRegistry();
diff --git a/sw/inc/ndole.hxx b/sw/inc/ndole.hxx
index 372b053e315e..6dc1b481ce9e 100644
--- a/sw/inc/ndole.hxx
+++ b/sw/inc/ndole.hxx
@@ -71,7 +71,7 @@ public:
 
     // try to get OLE visualization in form of a Primitive2DSequence
     // and the corresponding B2DRange. This data may be locally buffered
-    drawinglayer::primitive2d::Primitive2DContainer tryToGetChartContentAsPrimitive2DSequence(
+    drawinglayer::primitive2d::Primitive2DContainer const & tryToGetChartContentAsPrimitive2DSequence(
         basegfx::B2DRange& rRange,
         bool bSynchron);
     void resetBufferedData();
diff --git a/sw/inc/swmodule.hxx b/sw/inc/swmodule.hxx
index 2d088022fe1e..c749f9e3d9cc 100644
--- a/sw/inc/swmodule.hxx
+++ b/sw/inc/swmodule.hxx
@@ -232,10 +232,10 @@ public:
             GetLngSvcEvtListener();
     void    CreateLngSvcEvtListener();
 
-    css::uno::Reference< css::scanner::XScannerManager2 >
+    css::uno::Reference< css::scanner::XScannerManager2 > const &
             GetScannerManager();
 
-    css::uno::Reference< css::linguistic2::XLanguageGuessing >
+    css::uno::Reference< css::linguistic2::XLanguageGuessing > const &
             GetLanguageGuesser();
 };
 
diff --git a/sw/inc/tox.hxx b/sw/inc/tox.hxx
index 91d19beb7b58..63cf28621892 100644
--- a/sw/inc/tox.hxx
+++ b/sw/inc/tox.hxx
@@ -120,11 +120,11 @@ public:
     inline void             SetSecondaryKeyReading(const OUString& rStr);
     inline void             SetCitationKeyReading(const OUString& rStr);
 
-    inline OUString         GetPrimaryKey() const;
-    inline OUString         GetSecondaryKey() const;
-    inline OUString         GetTextReading() const;
-    inline OUString         GetPrimaryKeyReading() const;
-    inline OUString         GetSecondaryKeyReading() const;
+    inline OUString const & GetPrimaryKey() const;
+    inline OUString const & GetSecondaryKey() const;
+    inline OUString const & GetTextReading() const;
+    inline OUString const & GetPrimaryKeyReading() const;
+    inline OUString const & GetSecondaryKeyReading() const;
 
     bool                    IsAutoGenerated() const {return m_bAutoGenerated;}
     void                    SetAutoGenerated(bool bSet) {m_bAutoGenerated = bSet;}
@@ -292,7 +292,7 @@ public:
     SwForm& operator=( const SwForm& rForm );
 
     inline void SetTemplate(sal_uInt16 nLevel, const OUString& rName);
-    inline OUString GetTemplate(sal_uInt16 nLevel) const;
+    inline OUString const & GetTemplate(sal_uInt16 nLevel) const;
 
     // #i21237#
     void    SetPattern(sal_uInt16 nLevel, const SwFormTokens& rName);
@@ -472,7 +472,7 @@ public:
 
     // index of objects
 
-    OUString                GetStyleNames(sal_uInt16 nLevel) const
+    OUString const &        GetStyleNames(sal_uInt16 nLevel) const
                                 {
                                 SAL_WARN_IF( nLevel >= MAXLEVEL, "sw", "Which level?");
                                 return m_aStyleNames[nLevel];
@@ -599,31 +599,31 @@ inline sal_uInt16 SwTOXMark::GetLevel() const
     return m_nLevel;
 }
 
-inline OUString SwTOXMark::GetPrimaryKey() const
+inline OUString const & SwTOXMark::GetPrimaryKey() const
 {
     SAL_WARN_IF(GetTOXType()->GetType() != TOX_INDEX, "sw", "Wrong type");
     return m_aPrimaryKey;
 }
 
-inline OUString SwTOXMark::GetSecondaryKey() const
+inline OUString const & SwTOXMark::GetSecondaryKey() const
 {
     SAL_WARN_IF(GetTOXType()->GetType() != TOX_INDEX, "sw", "Wrong type");
     return m_aSecondaryKey;
 }
 
-inline OUString SwTOXMark::GetTextReading() const
+inline OUString const & SwTOXMark::GetTextReading() const
 {
     SAL_WARN_IF(GetTOXType()->GetType() != TOX_INDEX, "sw", "Wrong type");
     return m_aTextReading;
 }
 
-inline OUString SwTOXMark::GetPrimaryKeyReading() const
+inline OUString const & SwTOXMark::GetPrimaryKeyReading() const
 {
     SAL_WARN_IF(GetTOXType()->GetType() != TOX_INDEX, "sw", "Wrong type");
     return m_aPrimaryKeyReading;
 }
 
-inline OUString SwTOXMark::GetSecondaryKeyReading() const
+inline OUString const & SwTOXMark::GetSecondaryKeyReading() const
 {
     SAL_WARN_IF(GetTOXType()->GetType() != TOX_INDEX, "sw", "Wrong type");
     return m_aSecondaryKeyReading;
@@ -637,7 +637,7 @@ inline void SwForm::SetTemplate(sal_uInt16 nLevel, const OUString& rTemplate)
     m_aTemplate[nLevel] = rTemplate;
 }
 
-inline OUString SwForm::GetTemplate(sal_uInt16 nLevel) const
+inline OUString const & SwForm::GetTemplate(sal_uInt16 nLevel) const
 {
     SAL_WARN_IF(nLevel >= GetFormMax(), "sw", "Index >= GetFormMax()");
     return m_aTemplate[nLevel];
diff --git a/sw/source/core/access/accpara.cxx b/sw/source/core/access/accpara.cxx
index d497cfeff90a..6a5ac3040f9d 100644
--- a/sw/source/core/access/accpara.cxx
+++ b/sw/source/core/access/accpara.cxx
@@ -1126,7 +1126,7 @@ uno::Sequence< OUString > SAL_CALL SwAccessibleParagraph::getSupportedServiceNam
     return aRet;
 }
 
-uno::Sequence< OUString > getAttributeNames()
+uno::Sequence< OUString > const & getAttributeNames()
 {
     static uno::Sequence< OUString >* pNames = nullptr;
 
@@ -1159,7 +1159,7 @@ uno::Sequence< OUString > getAttributeNames()
     return *pNames;
 }
 
-uno::Sequence< OUString > getSupplementalAttributeNames()
+uno::Sequence< OUString > const & getSupplementalAttributeNames()
 {
     static uno::Sequence< OUString >* pNames = nullptr;
 
diff --git a/sw/source/core/doc/doc.cxx b/sw/source/core/doc/doc.cxx
index d4b951adc1a8..63075b8a771d 100644
--- a/sw/source/core/doc/doc.cxx
+++ b/sw/source/core/doc/doc.cxx
@@ -1744,7 +1744,7 @@ void SwDoc::ChkCondColls()
      }
 }
 
-uno::Reference< script::vba::XVBAEventProcessor >
+uno::Reference< script::vba::XVBAEventProcessor > const &
 SwDoc::GetVbaEventProcessor()
 {
 #if HAVE_FEATURE_SCRIPTING
diff --git a/sw/source/core/doc/docnew.cxx b/sw/source/core/doc/docnew.cxx
index 80c148ba2539..0ada4b63e6f5 100644
--- a/sw/source/core/doc/docnew.cxx
+++ b/sw/source/core/doc/docnew.cxx
@@ -136,7 +136,7 @@ const sal_Char sGrfCollStr[] = "Graphikformatvorlage";
 /*
  * global functions...
  */
- uno::Reference< linguistic2::XProofreadingIterator > SwDoc::GetGCIterator() const
+ uno::Reference< linguistic2::XProofreadingIterator > const & SwDoc::GetGCIterator() const
 {
     if (!m_xGCIterator.is() && SvtLinguConfig().HasGrammarChecker())
     {
diff --git a/sw/source/core/inc/txmsrt.hxx b/sw/source/core/inc/txmsrt.hxx
index 10e4d36405e9..210702d2ace9 100644
--- a/sw/source/core/inc/txmsrt.hxx
+++ b/sw/source/core/inc/txmsrt.hxx
@@ -145,7 +145,7 @@ struct SwTOXSortTabBase
 
     virtual OUString  GetURL() const;
 
-    inline TextAndReading GetText() const;
+    inline TextAndReading const & GetText() const;
     inline const css::lang::Locale& GetLocale() const;
 
 private:
@@ -155,7 +155,7 @@ private:
     virtual TextAndReading GetText_Impl() const = 0;
 };
 
-inline TextAndReading SwTOXSortTabBase::GetText() const
+inline TextAndReading const & SwTOXSortTabBase::GetText() const
 {
     if( !bValidText )
     {
diff --git a/sw/source/core/ole/ndole.cxx b/sw/source/core/ole/ndole.cxx
index 416089205b48..46197375c712 100644
--- a/sw/source/core/ole/ndole.cxx
+++ b/sw/source/core/ole/ndole.cxx
@@ -1022,7 +1022,7 @@ OUString SwOLEObj::GetDescription()
     return SW_RESSTR(STR_OLE);
 }
 
-drawinglayer::primitive2d::Primitive2DContainer SwOLEObj::tryToGetChartContentAsPrimitive2DSequence(
+drawinglayer::primitive2d::Primitive2DContainer const & SwOLEObj::tryToGetChartContentAsPrimitive2DSequence(
     basegfx::B2DRange& rRange,
     bool bSynchron)
 {
diff --git a/sw/source/ui/vba/vbaglobals.cxx b/sw/source/ui/vba/vbaglobals.cxx
index c7d719e69adc..82d8fbaa286d 100644
--- a/sw/source/ui/vba/vbaglobals.cxx
+++ b/sw/source/ui/vba/vbaglobals.cxx
@@ -52,7 +52,7 @@ SwVbaGlobals::~SwVbaGlobals()
 
 // XGlobals
 
-uno::Reference<word::XApplication >
+uno::Reference<word::XApplication > const &
 SwVbaGlobals::getApplication() throw (uno::RuntimeException)
 {
     OSL_TRACE("In SwVbaGlobals::getApplication");
diff --git a/sw/source/ui/vba/vbaglobals.hxx b/sw/source/ui/vba/vbaglobals.hxx
index 47a029e6c4b3..e473f83956f0 100644
--- a/sw/source/ui/vba/vbaglobals.hxx
+++ b/sw/source/ui/vba/vbaglobals.hxx
@@ -38,7 +38,7 @@ class SwVbaGlobals : public SwVbaGlobals_BASE
 private:
     css::uno::Reference< ooo::vba::word::XApplication > mxApplication;
 
-    css::uno::Reference< ooo::vba::word::XApplication > getApplication() throw (css::uno::RuntimeException);
+    css::uno::Reference< ooo::vba::word::XApplication > const & getApplication() throw (css::uno::RuntimeException);
 
 public:
 
diff --git a/sw/source/uibase/app/swmodule.cxx b/sw/source/uibase/app/swmodule.cxx
index f436e09070e3..e637b960dba0 100644
--- a/sw/source/uibase/app/swmodule.cxx
+++ b/sw/source/uibase/app/swmodule.cxx
@@ -192,7 +192,7 @@ SwModule::SwModule( SfxObjectFactory* pWebFact,
         GetColorConfig();
     }
 }
-uno::Reference< scanner::XScannerManager2 >
+uno::Reference< scanner::XScannerManager2 > const &
 SwModule::GetScannerManager()
 {
     if (!m_xScannerManager.is())
@@ -202,7 +202,7 @@ SwModule::GetScannerManager()
     return m_xScannerManager;
 }
 
-uno::Reference< linguistic2::XLanguageGuessing > SwModule::GetLanguageGuesser()
+uno::Reference< linguistic2::XLanguageGuessing > const & SwModule::GetLanguageGuesser()
 {
     if (!m_xLanguageGuesser.is())
     {
diff --git a/sw/source/uibase/dbui/dbmgr.cxx b/sw/source/uibase/dbui/dbmgr.cxx
index 5721cd33971e..197cc08e5a76 100644
--- a/sw/source/uibase/dbui/dbmgr.cxx
+++ b/sw/source/uibase/dbui/dbmgr.cxx
@@ -2322,7 +2322,7 @@ bool SwDBManager::OpenDataSource(const OUString& rDataSource, const OUString& rT
     return pFound->xResultSet.is();
 }
 
-uno::Reference< sdbc::XConnection> SwDBManager::RegisterConnection(OUString const& rDataSource)
+uno::Reference< sdbc::XConnection> const & SwDBManager::RegisterConnection(OUString const& rDataSource)
 {
     SwDSParam* pFound = SwDBManager::FindDSConnection(rDataSource, true);
     uno::Reference< sdbc::XDataSource> xSource;
diff --git a/sw/source/uibase/fldui/fldmgr.cxx b/sw/source/uibase/fldui/fldmgr.cxx
index 9f02086a8aa4..29677576858d 100644
--- a/sw/source/uibase/fldui/fldmgr.cxx
+++ b/sw/source/uibase/fldui/fldmgr.cxx
@@ -1679,7 +1679,7 @@ sal_uLong SwFieldMgr::GetDefaultFormat(sal_uInt16 nTypeId, bool bIsText, SvNumbe
     return pFormatter->GetStandardFormat(nDefFormat, GetCurrLanguage());
 }
 
-Reference<XNumberingTypeInfo> SwFieldMgr::GetNumberingInfo() const
+Reference<XNumberingTypeInfo> const & SwFieldMgr::GetNumberingInfo() const
 {
     if(!xNumberingInfo.is())
     {
diff --git a/sw/source/uibase/inc/fldmgr.hxx b/sw/source/uibase/inc/fldmgr.hxx
index 526f5254b0ed..e65f163d0957 100644
--- a/sw/source/uibase/inc/fldmgr.hxx
+++ b/sw/source/uibase/inc/fldmgr.hxx
@@ -110,7 +110,7 @@ private:
     SAL_DLLPRIVATE sal_uInt16            GetCurrLanguage() const;
 
     css::uno::Reference<css::text::XNumberingTypeInfo> xNumberingInfo;
-    SAL_DLLPRIVATE css::uno::Reference<css::text::XNumberingTypeInfo> GetNumberingInfo()const;
+    SAL_DLLPRIVATE css::uno::Reference<css::text::XNumberingTypeInfo> const & GetNumberingInfo()const;
 
 public:
     explicit SwFieldMgr(SwWrtShell* pSh = nullptr);
diff --git a/toolkit/source/awt/vclxprinter.cxx b/toolkit/source/awt/vclxprinter.cxx
index 3a12b2367053..9adc64e1196e 100644
--- a/toolkit/source/awt/vclxprinter.cxx
+++ b/toolkit/source/awt/vclxprinter.cxx
@@ -85,7 +85,7 @@ VCLXPrinterPropertySet::~VCLXPrinterPropertySet()
     mxPrinter.reset();
 }
 
-css::uno::Reference< css::awt::XDevice >  VCLXPrinterPropertySet::GetDevice()
+css::uno::Reference< css::awt::XDevice > const &  VCLXPrinterPropertySet::GetDevice()
 {
     if ( !mxPrnDevice.is() )
     {
diff --git a/ucb/source/core/providermap.hxx b/ucb/source/core/providermap.hxx
index b7a242aca0f2..ba793aad9e73 100644
--- a/ucb/source/core/providermap.hxx
+++ b/ucb/source/core/providermap.hxx
@@ -37,7 +37,7 @@ class ProviderListEntry_Impl
         css::ucb::XContentProvider > m_xResolvedProvider;
 
 private:
-    css::uno::Reference< css::ucb::XContentProvider > resolveProvider() const;
+    css::uno::Reference< css::ucb::XContentProvider > const & resolveProvider() const;
 
 public:
     explicit ProviderListEntry_Impl(
diff --git a/ucb/source/core/ucb.cxx b/ucb/source/core/ucb.cxx
index 09437c20576d..5f9f16b346be 100644
--- a/ucb/source/core/ucb.cxx
+++ b/ucb/source/core/ucb.cxx
@@ -941,7 +941,7 @@ bool UniversalContentBroker::getContentProviderData(
 // ProviderListEntry_Impl implementation.
 
 
-Reference< XContentProvider > ProviderListEntry_Impl::resolveProvider() const
+Reference< XContentProvider > const & ProviderListEntry_Impl::resolveProvider() const
 {
     if ( !m_xResolvedProvider.is() )
     {
diff --git a/ucb/source/ucp/cmis/cmis_content.cxx b/ucb/source/ucp/cmis/cmis_content.cxx
index 6180c6d7d30e..5dd9951402f1 100644
--- a/ucb/source/ucp/cmis/cmis_content.cxx
+++ b/ucb/source/ucp/cmis/cmis_content.cxx
@@ -446,7 +446,7 @@ namespace cmis
         return m_pSession;
     }
 
-    libcmis::ObjectTypePtr Content::getObjectType( const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+    libcmis::ObjectTypePtr const & Content::getObjectType( const uno::Reference< ucb::XCommandEnvironment >& xEnv )
     {
         if ( nullptr == m_pObjectType.get( ) && m_bTransient )
         {
@@ -496,7 +496,7 @@ namespace cmis
     }
 
 
-    libcmis::ObjectPtr Content::getObject( const uno::Reference< ucb::XCommandEnvironment >& xEnv ) throw (css::uno::RuntimeException, css::ucb::CommandFailedException, libcmis::Exception)
+    libcmis::ObjectPtr const & Content::getObject( const uno::Reference< ucb::XCommandEnvironment >& xEnv ) throw (css::uno::RuntimeException, css::ucb::CommandFailedException, libcmis::Exception)
     {
         // can't get the session for some reason
         // the recent file opening at start up is an example.
diff --git a/ucb/source/ucp/cmis/cmis_content.hxx b/ucb/source/ucp/cmis/cmis_content.hxx
index 0252ed59de29..9e6a0516995b 100644
--- a/ucb/source/ucp/cmis/cmis_content.hxx
+++ b/ucb/source/ucp/cmis/cmis_content.hxx
@@ -80,7 +80,7 @@ private:
             const css::uno::Reference< css::ucb::XCommandEnvironment >& xEnv );
 
     libcmis::Session* getSession( const css::uno::Reference< css::ucb::XCommandEnvironment >& xEnv );
-    libcmis::ObjectTypePtr getObjectType( const css::uno::Reference< css::ucb::XCommandEnvironment >& xEnv );
+    libcmis::ObjectTypePtr const & getObjectType( const css::uno::Reference< css::ucb::XCommandEnvironment >& xEnv );
 
 private:
     typedef rtl::Reference< Content > ContentRef;
@@ -199,7 +199,7 @@ public:
 
     virtual std::list< css::uno::Reference< css::ucb::XContent > > getChildren( ) override;
 
-    libcmis::ObjectPtr getObject( const css::uno::Reference< css::ucb::XCommandEnvironment >& xEnv ) throw (css::uno::RuntimeException, css::ucb::CommandFailedException, libcmis::Exception);
+    libcmis::ObjectPtr const & getObject( const css::uno::Reference< css::ucb::XCommandEnvironment >& xEnv ) throw (css::uno::RuntimeException, css::ucb::CommandFailedException, libcmis::Exception);
 };
 
 }
diff --git a/ucb/source/ucp/file/filtask.hxx b/ucb/source/ucp/file/filtask.hxx
index f2b0d89eab0c..24f78bb7cb93 100644
--- a/ucb/source/ucp/file/filtask.hxx
+++ b/ucb/source/ucp/file/filtask.hxx
@@ -110,7 +110,7 @@ namespace fileaccess
                 return m_nMinorCode;
             }
 
-            css::uno::Reference< css::task::XInteractionHandler > SAL_CALL
+            css::uno::Reference< css::task::XInteractionHandler > const & SAL_CALL
             getInteractionHandler()
             {
                 if( ! m_xInteractionHandler.is() && m_xCommandEnvironment.is() )
diff --git a/ucbhelper/source/provider/interactionrequest.cxx b/ucbhelper/source/provider/interactionrequest.cxx
index 79fc8706220a..52bc3b496bec 100644
--- a/ucbhelper/source/provider/interactionrequest.cxx
+++ b/ucbhelper/source/provider/interactionrequest.cxx
@@ -88,7 +88,7 @@ void InteractionRequest::setContinuations(
 }
 
 
-rtl::Reference< InteractionContinuation >
+rtl::Reference< InteractionContinuation > const &
 InteractionRequest::getSelection() const
 {
     return m_pImpl->m_xSelection;
diff --git a/unotools/source/config/lingucfg.cxx b/unotools/source/config/lingucfg.cxx
index 65fd554d1b5b..998bf16e40f8 100644
--- a/unotools/source/config/lingucfg.cxx
+++ b/unotools/source/config/lingucfg.cxx
@@ -1052,7 +1052,7 @@ std::vector< SvtLinguConfigDictionaryEntry > SvtLinguConfig::GetActiveDictionari
     return aRes;
 }
 
-uno::Reference< util::XChangesBatch > SvtLinguConfig::GetMainUpdateAccess() const
+uno::Reference< util::XChangesBatch > const & SvtLinguConfig::GetMainUpdateAccess() const
 {
     if (!m_xMainUpdateAccess.is())
     {
diff --git a/unotools/source/config/moduleoptions.cxx b/unotools/source/config/moduleoptions.cxx
index a07e472f5a53..1e2c1d7dc279 100644
--- a/unotools/source/config/moduleoptions.cxx
+++ b/unotools/source/config/moduleoptions.cxx
@@ -211,7 +211,7 @@ struct FactoryInfo
         };
 
     private:
-        css::uno::Reference< css::util::XStringSubstitution > getStringSubstitution()
+        css::uno::Reference< css::util::XStringSubstitution > const & getStringSubstitution()
         {
             if ( !xSubstVars.is() )
             {
diff --git a/unotools/source/i18n/localedatawrapper.cxx b/unotools/source/i18n/localedatawrapper.cxx
index 6dbd1388ba52..1a31ba56755e 100644
--- a/unotools/source/i18n/localedatawrapper.cxx
+++ b/unotools/source/i18n/localedatawrapper.cxx
@@ -498,7 +498,7 @@ void LocaleDataWrapper::getDefaultCalendarImpl()
     }
 }
 
-const std::shared_ptr< css::i18n::Calendar2 > LocaleDataWrapper::getDefaultCalendar() const
+const std::shared_ptr< css::i18n::Calendar2 >& LocaleDataWrapper::getDefaultCalendar() const
 {
     ::utl::ReadWriteGuard aGuard( aMutex );
     if (!xDefaultCalendar)
diff --git a/vbahelper/source/vbahelper/vbahelper.cxx b/vbahelper/source/vbahelper/vbahelper.cxx
index b2d52fd84a3c..2c6249b0f28d 100644
--- a/vbahelper/source/vbahelper/vbahelper.cxx
+++ b/vbahelper/source/vbahelper/vbahelper.cxx
@@ -109,7 +109,7 @@ getIntrospectionAccess( const uno::Any& aObject ) throw (uno::RuntimeException)
     return xIntrospection->inspect( aObject );
 }
 
-uno::Reference< script::XTypeConverter >
+uno::Reference< script::XTypeConverter > const &
 getTypeConverter( const uno::Reference< uno::XComponentContext >& xContext ) throw (uno::RuntimeException)
 {
     static uno::Reference< script::XTypeConverter > xTypeConv( script::Converter::create(xContext) );
diff --git a/vbahelper/source/vbahelper/vbashaperange.cxx b/vbahelper/source/vbahelper/vbashaperange.cxx
index 39fa9cbc286a..11aab8c2768d 100644
--- a/vbahelper/source/vbahelper/vbashaperange.cxx
+++ b/vbahelper/source/vbahelper/vbashaperange.cxx
@@ -71,7 +71,7 @@ ScVbaShapeRange::Group() throw (uno::RuntimeException, std::exception)
     return uno::Reference< msforms::XShape >( new ScVbaShape( getParent(), mxContext, xShape, getShapes(), m_xModel, office::MsoShapeType::msoGroup ) );
 }
 
-uno::Reference< drawing::XShapes >
+uno::Reference< drawing::XShapes > const &
 ScVbaShapeRange::getShapes() throw (uno::RuntimeException)
 {
     if ( !m_xShapes.is() )
diff --git a/vcl/inc/impfontcharmap.hxx b/vcl/inc/impfontcharmap.hxx
index 80c05b9ae799..82f65a86360f 100644
--- a/vcl/inc/impfontcharmap.hxx
+++ b/vcl/inc/impfontcharmap.hxx
@@ -41,7 +41,7 @@ private:
                         ImplFontCharMap( const ImplFontCharMap& ) = delete;
     void                operator=( const ImplFontCharMap& ) = delete;
 
-    static ImplFontCharMapPtr getDefaultMap( bool bSymbols=false);
+    static ImplFontCharMapPtr const & getDefaultMap( bool bSymbols=false);
     bool                isDefaultMap() const;
 
 private:
diff --git a/vcl/inc/printdlg.hxx b/vcl/inc/printdlg.hxx
index cf1dea21243b..71af53dfd7d7 100644
--- a/vcl/inc/printdlg.hxx
+++ b/vcl/inc/printdlg.hxx
@@ -212,7 +212,7 @@ namespace vcl
 
         bool                                mbShowLayoutPage;
 
-        Size getJobPageSize();
+        Size const & getJobPageSize();
         void updateNup();
         void updateNupFromPages();
         void preparePreview( bool i_bPrintChanged = true, bool i_bMayUseCache = false );
diff --git a/vcl/inc/unx/freetype_glyphcache.hxx b/vcl/inc/unx/freetype_glyphcache.hxx
index 3b8d315e5a5c..0a8cfbe14f31 100644
--- a/vcl/inc/unx/freetype_glyphcache.hxx
+++ b/vcl/inc/unx/freetype_glyphcache.hxx
@@ -82,7 +82,7 @@ public:
     void                  CacheGlyphIndex( sal_UCS4 cChar, int nGI ) const;
 
     bool                  GetFontCodeRanges( CmapResult& ) const;
-    const FontCharMapPtr  GetFontCharMap();
+    const FontCharMapPtr& GetFontCharMap();
 
 private:
     FT_FaceRec_*    maFaceFT;
diff --git a/vcl/inc/unx/gtk/gtkinst.hxx b/vcl/inc/unx/gtk/gtkinst.hxx
index e29d221129a8..02550fe0f3ce 100644
--- a/vcl/inc/unx/gtk/gtkinst.hxx
+++ b/vcl/inc/unx/gtk/gtkinst.hxx
@@ -242,7 +242,7 @@ public:
 
     void                        RemoveTimer (SalTimer *pTimer);
 
-    std::shared_ptr<vcl::unx::GtkPrintWrapper> getPrintWrapper() const;
+    std::shared_ptr<vcl::unx::GtkPrintWrapper> const & getPrintWrapper() const;
 
 private:
     std::vector<GtkSalTimer *>  m_aTimers;
diff --git a/vcl/source/control/edit.cxx b/vcl/source/control/edit.cxx
index 2152c28ceca0..0f64127df81b 100644
--- a/vcl/source/control/edit.cxx
+++ b/vcl/source/control/edit.cxx
@@ -785,7 +785,7 @@ uno::Reference < i18n::XBreakIterator > Edit::ImplGetBreakIterator() const
     return i18n::BreakIterator::create(xContext);
 }
 
-uno::Reference < i18n::XExtendedInputSequenceChecker > Edit::ImplGetInputSequenceChecker()
+uno::Reference < i18n::XExtendedInputSequenceChecker > const & Edit::ImplGetInputSequenceChecker()
 {
     if ( !mxISC.is() )
     {
diff --git a/vcl/source/control/field2.cxx b/vcl/source/control/field2.cxx
index 60760748d3ea..eb32e17bc0e6 100644
--- a/vcl/source/control/field2.cxx
+++ b/vcl/source/control/field2.cxx
@@ -57,7 +57,7 @@ using namespace ::comphelper;
 #define EDITMASK_ALLCHAR       'x'
 #define EDITMASK_UPPERALLCHAR  'X'
 
-uno::Reference< i18n::XCharacterClassification > ImplGetCharClass()
+uno::Reference< i18n::XCharacterClassification > const & ImplGetCharClass()
 {
     static uno::Reference< i18n::XCharacterClassification > xCharClass;
     if ( !xCharClass.is() )
diff --git a/vcl/source/control/longcurr.cxx b/vcl/source/control/longcurr.cxx
index b9283666c79d..75ddd72c9285 100644
--- a/vcl/source/control/longcurr.cxx
+++ b/vcl/source/control/longcurr.cxx
@@ -309,7 +309,7 @@ void LongCurrencyFormatter::SetCurrencySymbol( const OUString& rStr )
     ReformatAll();
 }
 
-OUString LongCurrencyFormatter::GetCurrencySymbol() const
+OUString const & LongCurrencyFormatter::GetCurrencySymbol() const
 {
     return !maCurrencySymbol.isEmpty() ? maCurrencySymbol : GetLocaleDataWrapper().getCurrSymbol();
 }
diff --git a/vcl/source/control/tabctrl.cxx b/vcl/source/control/tabctrl.cxx
index 9441dea04ef6..d165f21467f2 100644
--- a/vcl/source/control/tabctrl.cxx
+++ b/vcl/source/control/tabctrl.cxx
@@ -1943,7 +1943,7 @@ void TabControl::SetPageText( sal_uInt16 nPageId, const OUString& rText )
     }
 }
 
-OUString TabControl::GetPageText( sal_uInt16 nPageId ) const
+OUString const & TabControl::GetPageText( sal_uInt16 nPageId ) const
 {
     ImplTabItem* pItem = ImplGetItem( nPageId );
 
diff --git a/vcl/source/edit/texteng.cxx b/vcl/source/edit/texteng.cxx
index 8f7765410fa4..deaad286e0dc 100644
--- a/vcl/source/edit/texteng.cxx
+++ b/vcl/source/edit/texteng.cxx
@@ -615,7 +615,7 @@ void TextEngine::ImpRemoveParagraph( sal_uInt32 nPara )
     ImpParagraphRemoved( nPara );
 }
 
-uno::Reference < i18n::XExtendedInputSequenceChecker > TextEngine::GetInputSequenceChecker()
+uno::Reference < i18n::XExtendedInputSequenceChecker > const & TextEngine::GetInputSequenceChecker()
 {
     if ( !mxISC.is() )
     {
@@ -2793,7 +2793,7 @@ void TextEngine::SetLeftMargin( sal_uInt16 n )
     mpDoc->SetLeftMargin( n );
 }
 
-uno::Reference< i18n::XBreakIterator > TextEngine::GetBreakIterator()
+uno::Reference< i18n::XBreakIterator > const & TextEngine::GetBreakIterator()
 {
     if ( !mxBreakIterator.is() )
         mxBreakIterator = vcl::unohelper::CreateBreakIterator();
@@ -2808,7 +2808,7 @@ void TextEngine::SetLocale( const css::lang::Locale& rLocale )
     mpLocaleDataWrapper = nullptr;
 }
 
-css::lang::Locale TextEngine::GetLocale()
+css::lang::Locale const & TextEngine::GetLocale()
 {
     if ( maLocale.Language.isEmpty() )
     {
diff --git a/vcl/source/font/fontcharmap.cxx b/vcl/source/font/fontcharmap.cxx
index 821427db93bf..3443cdb6f45f 100644
--- a/vcl/source/font/fontcharmap.cxx
+++ b/vcl/source/font/fontcharmap.cxx
@@ -63,7 +63,7 @@ ImplFontCharMap::ImplFontCharMap( const CmapResult& rCR )
     }
 }
 
-ImplFontCharMapPtr ImplFontCharMap::getDefaultMap( bool bSymbols )
+ImplFontCharMapPtr const & ImplFontCharMap::getDefaultMap( bool bSymbols )
 {
     const sal_UCS4* pRangeCodes = aDefaultUnicodeRanges;
     int nCodesCount = sizeof(aDefaultUnicodeRanges) / sizeof(*pRangeCodes);
diff --git a/vcl/source/helper/commandinfoprovider.cxx b/vcl/source/helper/commandinfoprovider.cxx
index 00fa0c8cc093..956b4bafe55b 100644
--- a/vcl/source/helper/commandinfoprovider.cxx
+++ b/vcl/source/helper/commandinfoprovider.cxx
@@ -323,7 +323,7 @@ void CommandInfoProvider::SetFrame (const Reference<frame::XFrame>& rxFrame)
     }
 }
 
-Reference<ui::XAcceleratorConfiguration> CommandInfoProvider::GetDocumentAcceleratorConfiguration()
+Reference<ui::XAcceleratorConfiguration> const & CommandInfoProvider::GetDocumentAcceleratorConfiguration()
 {
     if ( ! mxCachedDocumentAcceleratorConfiguration.is())
     {
@@ -354,7 +354,7 @@ Reference<ui::XAcceleratorConfiguration> CommandInfoProvider::GetDocumentAcceler
     return mxCachedDocumentAcceleratorConfiguration;
 }
 
-Reference<ui::XAcceleratorConfiguration> CommandInfoProvider::GetModuleAcceleratorConfiguration()
+Reference<ui::XAcceleratorConfiguration> const & CommandInfoProvider::GetModuleAcceleratorConfiguration()
 {
     if ( ! mxCachedModuleAcceleratorConfiguration.is())
     {
@@ -375,7 +375,7 @@ Reference<ui::XAcceleratorConfiguration> CommandInfoProvider::GetModuleAccelerat
     return mxCachedModuleAcceleratorConfiguration;
 }
 
-Reference<ui::XAcceleratorConfiguration> CommandInfoProvider::GetGlobalAcceleratorConfiguration()
+Reference<ui::XAcceleratorConfiguration> const & CommandInfoProvider::GetGlobalAcceleratorConfiguration()
 {
     // Get the global accelerator configuration.
     if ( ! mxCachedGlobalAcceleratorConfiguration.is())
@@ -386,7 +386,7 @@ Reference<ui::XAcceleratorConfiguration> CommandInfoProvider::GetGlobalAccelerat
     return mxCachedGlobalAcceleratorConfiguration;
 }
 
-OUString CommandInfoProvider::GetModuleIdentifier()
+OUString const & CommandInfoProvider::GetModuleIdentifier()
 {
     if (msCachedModuleIdentifier.getLength() == 0)
     {
diff --git a/vcl/source/window/layout.cxx b/vcl/source/window/layout.cxx
index f93aaaaa2af5..dd776a5b68dc 100644
--- a/vcl/source/window/layout.cxx
+++ b/vcl/source/window/layout.cxx
@@ -2271,14 +2271,14 @@ short MessageDialog::Execute()
     return Dialog::Execute();
 }
 
-OUString MessageDialog::get_primary_text() const
+OUString const & MessageDialog::get_primary_text() const
 {
     const_cast<MessageDialog*>(this)->setDeferredProperties();
 
     return m_sPrimaryString;
 }
 
-OUString MessageDialog::get_secondary_text() const
+OUString const & MessageDialog::get_secondary_text() const
 {
     const_cast<MessageDialog*>(this)->setDeferredProperties();
 
diff --git a/vcl/source/window/mnemonic.cxx b/vcl/source/window/mnemonic.cxx
index 530e5ff626fa..fe57879d6444 100644
--- a/vcl/source/window/mnemonic.cxx
+++ b/vcl/source/window/mnemonic.cxx
@@ -296,7 +296,7 @@ OUString MnemonicGenerator::CreateMnemonic( const OUString& _rKey )
     return rKey;
 }
 
-uno::Reference< i18n::XCharacterClassification > MnemonicGenerator::GetCharClass()
+uno::Reference< i18n::XCharacterClassification > const & MnemonicGenerator::GetCharClass()
 {
     if ( !mxCharClass.is() )
         mxCharClass = vcl::unohelper::CreateCharacterClassification();
diff --git a/vcl/source/window/printdlg.cxx b/vcl/source/window/printdlg.cxx
index f8d51a006293..258df1778a59 100644
--- a/vcl/source/window/printdlg.cxx
+++ b/vcl/source/window/printdlg.cxx
@@ -1356,7 +1356,7 @@ void PrintDialog::preparePreview( bool i_bNewPage, bool i_bMayUseCache )
     }
 }
 
-Size PrintDialog::getJobPageSize()
+Size const & PrintDialog::getJobPageSize()
 {
     if( maFirstPageSize.Width() == 0 && maFirstPageSize.Height() == 0)
     {
diff --git a/vcl/unx/generic/fontmanager/helper.cxx b/vcl/unx/generic/fontmanager/helper.cxx
index 8b7c2ed722b4..2f83b96e5f0c 100644
--- a/vcl/unx/generic/fontmanager/helper.cxx
+++ b/vcl/unx/generic/fontmanager/helper.cxx
@@ -37,7 +37,7 @@ using ::rtl::Bootstrap;
 
 namespace psp {
 
-OUString getOfficePath( whichOfficePath ePath )
+OUString const & getOfficePath( whichOfficePath ePath )
 {
     static OUString aInstallationRootPath;
     static OUString aUserPath;
@@ -185,7 +185,7 @@ void psp::getPrinterPathList( std::list< OUString >& rPathList, const char* pSub
     }
 }
 
-OUString psp::getFontPath()
+OUString const & psp::getFontPath()
 {
     static OUString aPath;
 
diff --git a/vcl/unx/generic/glyphs/freetype_glyphcache.cxx b/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
index 7023a5f1b9ea..2f26cceb13ea 100644
--- a/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
+++ b/vcl/unx/generic/glyphs/freetype_glyphcache.cxx
@@ -977,7 +977,7 @@ const FontCharMapPtr ServerFont::GetFontCharMap() const
     return xFCMap;
 }
 
-const FontCharMapPtr FreetypeFontInfo::GetFontCharMap()
+const FontCharMapPtr& FreetypeFontInfo::GetFontCharMap()
 {
     // check if the charmap is already cached
     if( mxFontCharMap )
diff --git a/vcl/unx/gtk/a11y/atkhypertext.cxx b/vcl/unx/gtk/a11y/atkhypertext.cxx
index 1b6529040798..e7f7773ac0a6 100644
--- a/vcl/unx/gtk/a11y/atkhypertext.cxx
+++ b/vcl/unx/gtk/a11y/atkhypertext.cxx
@@ -29,7 +29,7 @@ typedef struct {
     uno::Reference< accessibility::XAccessibleHyperlink > xLink;
 } HyperLink;
 
-static uno::Reference< accessibility::XAccessibleHyperlink >
+static uno::Reference< accessibility::XAccessibleHyperlink > const &
     getHyperlink( AtkHyperlink *pHyperlink )
 {
     HyperLink *pLink = reinterpret_cast<HyperLink *>(pHyperlink);
diff --git a/vcl/unx/gtk/gtkinst.cxx b/vcl/unx/gtk/gtkinst.cxx
index 22cdca8f1938..c131721a00c6 100644
--- a/vcl/unx/gtk/gtkinst.cxx
+++ b/vcl/unx/gtk/gtkinst.cxx
@@ -469,7 +469,7 @@ GenPspGraphics *GtkInstance::CreatePrintGraphics()
     return new GenPspGraphics();
 }
 
-std::shared_ptr<vcl::unx::GtkPrintWrapper>
+std::shared_ptr<vcl::unx::GtkPrintWrapper> const &
 GtkInstance::getPrintWrapper() const
 {
     if (!m_xPrintWrapper)
diff --git a/writerfilter/inc/ooxml/QNameToString.hxx b/writerfilter/inc/ooxml/QNameToString.hxx
index a525eb881d60..603204a1dbed 100644
--- a/writerfilter/inc/ooxml/QNameToString.hxx
+++ b/writerfilter/inc/ooxml/QNameToString.hxx
@@ -47,7 +47,7 @@ protected:
     QNameToString();
 
 public:
-    static Pointer_t Instance();
+    static Pointer_t const & Instance();
 
     std::string operator()(Id qName);
 };
diff --git a/writerfilter/source/dmapper/DomainMapper_Impl.cxx b/writerfilter/source/dmapper/DomainMapper_Impl.cxx
index 018f39984298..b5dff72ac83b 100644
--- a/writerfilter/source/dmapper/DomainMapper_Impl.cxx
+++ b/writerfilter/source/dmapper/DomainMapper_Impl.cxx
@@ -274,7 +274,7 @@ DomainMapper_Impl::~DomainMapper_Impl()
     }
 }
 
-uno::Reference< container::XNameContainer >    DomainMapper_Impl::GetPageStyles()
+uno::Reference< container::XNameContainer > const &  DomainMapper_Impl::GetPageStyles()
 {
     if(!m_xPageStyles.is())
     {
@@ -286,7 +286,7 @@ uno::Reference< container::XNameContainer >    DomainMapper_Impl::GetPageStyles(
 }
 
 
-uno::Reference< text::XText > DomainMapper_Impl::GetBodyText()
+uno::Reference< text::XText > const & DomainMapper_Impl::GetBodyText()
 {
     if(!m_xBodyText.is())
     {
@@ -299,7 +299,7 @@ uno::Reference< text::XText > DomainMapper_Impl::GetBodyText()
 }
 
 
-uno::Reference< beans::XPropertySet > DomainMapper_Impl::GetDocumentSettings()
+uno::Reference< beans::XPropertySet > const & DomainMapper_Impl::GetDocumentSettings()
 {
     if( !m_xDocumentSettings.is() && m_xTextFactory.is())
     {
@@ -662,7 +662,7 @@ uno::Any DomainMapper_Impl::GetPropertyFromStyleSheet(PropertyIds eId)
 }
 
 
-ListsManager::Pointer DomainMapper_Impl::GetListTable()
+ListsManager::Pointer const & DomainMapper_Impl::GetListTable()
 {
     if(!m_pListTable)
         m_pListTable.reset(
@@ -4678,7 +4678,7 @@ void DomainMapper_Impl::AddAnnotationPosition(
     m_aAnnotationPositions[ nAnnotationId ] = aAnnotationPosition;
 }
 
-GraphicImportPtr DomainMapper_Impl::GetGraphicImport(GraphicImportType eGraphicImportType)
+GraphicImportPtr const & DomainMapper_Impl::GetGraphicImport(GraphicImportType eGraphicImportType)
 {
     if(!m_pGraphicImport)
         m_pGraphicImport.reset( new GraphicImport( m_xComponentContext, m_xTextFactory, m_rDMapper, eGraphicImportType, m_aPositionOffsets, m_aAligns, m_aPositivePercentages ) );
diff --git a/writerfilter/source/dmapper/DomainMapper_Impl.hxx b/writerfilter/source/dmapper/DomainMapper_Impl.hxx
index c0e13701c559..ec66b2015b97 100644
--- a/writerfilter/source/dmapper/DomainMapper_Impl.hxx
+++ b/writerfilter/source/dmapper/DomainMapper_Impl.hxx
@@ -457,7 +457,7 @@ private:
     void GetCurrentLocale(css::lang::Locale& rLocale);
     void SetNumberFormat(const OUString& rCommand, css::uno::Reference<css::beans::XPropertySet> const& xPropertySet, bool bDetectFormat = false);
     css::uno::Reference<css::beans::XPropertySet> FindOrCreateFieldMaster(const sal_Char* pFieldMasterService, const OUString& rFieldMasterName) throw(css::uno::Exception);
-    css::uno::Reference<css::beans::XPropertySet> GetDocumentSettings();
+    css::uno::Reference<css::beans::XPropertySet> const & GetDocumentSettings();
 
     std::map<sal_Int32, css::uno::Any> deferredCharacterProperties;
     SmartTagHandler m_aSmartTagHandler;
@@ -480,8 +480,8 @@ public:
         return dynamic_cast< SectionPropertyMap* >( m_pLastSectionContext.get( ) );
     }
 
-    css::uno::Reference<css::container::XNameContainer> GetPageStyles();
-    css::uno::Reference<css::text::XText> GetBodyText();
+    css::uno::Reference<css::container::XNameContainer> const & GetPageStyles();
+    css::uno::Reference<css::text::XText> const & GetBodyText();
     const css::uno::Reference<css::lang::XMultiServiceFactory>& GetTextFactory() const
     {
         return m_xTextFactory;
@@ -569,34 +569,34 @@ public:
     css::uno::Reference<css::text::XTextAppend> GetTopTextAppend();
     FieldContextPtr GetTopFieldContext();
 
-    FontTablePtr GetFontTable()
+    FontTablePtr const & GetFontTable()
     {
         if(!m_pFontTable)
             m_pFontTable.reset(new FontTable());
          return m_pFontTable;
     }
-    StyleSheetTablePtr GetStyleSheetTable()
+    StyleSheetTablePtr const & GetStyleSheetTable()
     {
         if(!m_pStyleSheetTable)
             m_pStyleSheetTable.reset(new StyleSheetTable( m_rDMapper, m_xTextDocument, m_bIsNewDoc ));
         return m_pStyleSheetTable;
     }
-    ListsManager::Pointer GetListTable();
-    ThemeTablePtr GetThemeTable()
+    ListsManager::Pointer const & GetListTable();
+    ThemeTablePtr const & GetThemeTable()
     {
         if(!m_pThemeTable)
             m_pThemeTable.reset( new ThemeTable );
         return m_pThemeTable;
     }
 
-    SettingsTablePtr GetSettingsTable()
+    SettingsTablePtr const & GetSettingsTable()
     {
         if( !m_pSettingsTable )
             m_pSettingsTable.reset( new SettingsTable );
         return m_pSettingsTable;
     }
 
-    GraphicImportPtr GetGraphicImport( GraphicImportType eGraphicImportType );
+    GraphicImportPtr const & GetGraphicImport( GraphicImportType eGraphicImportType );
     void            ResetGraphicImport();
     // this method deletes the current m_pGraphicImport after import
     void    ImportGraphic(const writerfilter::Reference< Properties>::Pointer_t&, GraphicImportType eGraphicImportType );
diff --git a/writerfilter/source/dmapper/FormControlHelper.cxx b/writerfilter/source/dmapper/FormControlHelper.cxx
index 9eabcea5ed0c..38899b0175aa 100644
--- a/writerfilter/source/dmapper/FormControlHelper.cxx
+++ b/writerfilter/source/dmapper/FormControlHelper.cxx
@@ -53,13 +53,13 @@ struct FormControlHelper::FormControlHelper_Impl
     uno::Reference<lang::XMultiServiceFactory> rServiceFactory;
     uno::Reference<text::XTextDocument> rTextDocument;
 
-    uno::Reference<drawing::XDrawPage> getDrawPage();
-    uno::Reference<lang::XMultiServiceFactory> getServiceFactory();
-    uno::Reference<form::XForm> getForm();
+    uno::Reference<drawing::XDrawPage> const & getDrawPage();
+    uno::Reference<lang::XMultiServiceFactory> const & getServiceFactory();
+    uno::Reference<form::XForm> const & getForm();
     uno::Reference<container::XIndexContainer> getFormComps();
 };
 
-uno::Reference<drawing::XDrawPage> FormControlHelper::FormControlHelper_Impl::getDrawPage()
+uno::Reference<drawing::XDrawPage> const & FormControlHelper::FormControlHelper_Impl::getDrawPage()
 {
     if (! rDrawPage.is())
     {
@@ -72,7 +72,7 @@ uno::Reference<drawing::XDrawPage> FormControlHelper::FormControlHelper_Impl::ge
     return rDrawPage;
 }
 
-uno::Reference<lang::XMultiServiceFactory> FormControlHelper::FormControlHelper_Impl::getServiceFactory()
+uno::Reference<lang::XMultiServiceFactory> const & FormControlHelper::FormControlHelper_Impl::getServiceFactory()
 {
     if (! rServiceFactory.is())
         rServiceFactory.set(rTextDocument, uno::UNO_QUERY);
@@ -80,7 +80,7 @@ uno::Reference<lang::XMultiServiceFactory> FormControlHelper::FormControlHelper_
     return rServiceFactory;
 }
 
-uno::Reference<form::XForm> FormControlHelper::FormControlHelper_Impl::getForm()
+uno::Reference<form::XForm> const & FormControlHelper::FormControlHelper_Impl::getForm()
 {
     if (! rForm.is())
     {
diff --git a/writerfilter/source/dmapper/GraphicImport.cxx b/writerfilter/source/dmapper/GraphicImport.cxx
index 0592d56ce506..c526c6de3b17 100644
--- a/writerfilter/source/dmapper/GraphicImport.cxx
+++ b/writerfilter/source/dmapper/GraphicImport.cxx
@@ -404,7 +404,7 @@ public:
     }
 
     /// Getter for m_aInteropGrabBag, but also merges in the values from other members if they are set.
-    comphelper::SequenceAsHashMap getInteropGrabBag()
+    comphelper::SequenceAsHashMap const & getInteropGrabBag()
     {
         comphelper::SequenceAsHashMap aEffectExtent;
         if (m_oEffectExtentLeft)
diff --git a/writerfilter/source/ooxml/OOXMLFastDocumentHandler.cxx b/writerfilter/source/ooxml/OOXMLFastDocumentHandler.cxx
index 715b8a2fa122..89287f140412 100644
--- a/writerfilter/source/ooxml/OOXMLFastDocumentHandler.cxx
+++ b/writerfilter/source/ooxml/OOXMLFastDocumentHandler.cxx
@@ -117,7 +117,7 @@ throw (uno::RuntimeException, xml::sax::SAXException, std::exception)
 #endif
 }
 
-rtl::Reference< OOXMLFastContextHandler >
+rtl::Reference< OOXMLFastContextHandler > const &
 OOXMLFastDocumentHandler::getContextHandler() const
 {
     if (!mxContextHandler.is())
diff --git a/writerfilter/source/ooxml/OOXMLFastDocumentHandler.hxx b/writerfilter/source/ooxml/OOXMLFastDocumentHandler.hxx
index c104db71df63..5cfdc3679724 100644
--- a/writerfilter/source/ooxml/OOXMLFastDocumentHandler.hxx
+++ b/writerfilter/source/ooxml/OOXMLFastDocumentHandler.hxx
@@ -95,7 +95,7 @@ private:
     OOXMLDocumentImpl* mpDocument;
     sal_Int32 mnXNoteId;
     mutable rtl::Reference<OOXMLFastContextHandler> mxContextHandler;
-    rtl::Reference<OOXMLFastContextHandler> getContextHandler() const;
+    rtl::Reference<OOXMLFastContextHandler> const & getContextHandler() const;
 };
 }}
 
diff --git a/writerfilter/source/ooxml/OOXMLPropertySet.cxx b/writerfilter/source/ooxml/OOXMLPropertySet.cxx
index 5c0c3ccfeb08..535421da31e0 100644
--- a/writerfilter/source/ooxml/OOXMLPropertySet.cxx
+++ b/writerfilter/source/ooxml/OOXMLPropertySet.cxx
@@ -221,7 +221,7 @@ static bool GetBooleanValue(const char *pValue)
            || !strcmp(pValue, "On");
 }
 
-OOXMLValue::Pointer_t OOXMLBooleanValue::Create(bool bValue)
+OOXMLValue::Pointer_t const & OOXMLBooleanValue::Create(bool bValue)
 {
     static OOXMLValue::Pointer_t False(new OOXMLBooleanValue (false));
     static OOXMLValue::Pointer_t True(new OOXMLBooleanValue (true));
diff --git a/writerfilter/source/ooxml/OOXMLPropertySet.hxx b/writerfilter/source/ooxml/OOXMLPropertySet.hxx
index 812ca9cee38f..f37d22966e2b 100644
--- a/writerfilter/source/ooxml/OOXMLPropertySet.hxx
+++ b/writerfilter/source/ooxml/OOXMLPropertySet.hxx
@@ -93,7 +93,7 @@ protected:
     bool mbValue;
     explicit OOXMLBooleanValue(bool bValue);
 public:
-    static OOXMLValue::Pointer_t Create (bool bValue);
+    static OOXMLValue::Pointer_t const & Create (bool bValue);
     static OOXMLValue::Pointer_t Create (const char *pValue);
 
     virtual ~OOXMLBooleanValue();
diff --git a/writerfilter/source/ooxml/qnametostrcore.cxx b/writerfilter/source/ooxml/qnametostrcore.cxx
index 2cf13703d99a..c4509b9a76f7 100644
--- a/writerfilter/source/ooxml/qnametostrcore.cxx
+++ b/writerfilter/source/ooxml/qnametostrcore.cxx
@@ -24,7 +24,7 @@ namespace writerfilter
 
 QNameToString::Pointer_t QNameToString::pInstance;
 
-QNameToString::Pointer_t QNameToString::Instance()
+QNameToString::Pointer_t const & QNameToString::Instance()
 {
     if (pInstance.get() == nullptr)
         pInstance = QNameToString::Pointer_t(new QNameToString());
diff --git a/writerperfect/source/common/WPXSvInputStream.cxx b/writerperfect/source/common/WPXSvInputStream.cxx
index fd0bd791ca66..d52c696e0f23 100644
--- a/writerperfect/source/common/WPXSvInputStream.cxx
+++ b/writerperfect/source/common/WPXSvInputStream.cxx
@@ -143,7 +143,7 @@ struct OLEStorageImpl
     void initialize(SvStream *pStream);
 
     tools::SvRef<SotStorageStream> getStream(const rtl::OUString &rPath);
-    tools::SvRef<SotStorageStream> getStream(std::size_t nId);
+    tools::SvRef<SotStorageStream> const & getStream(std::size_t nId);
 
 private:
     void traverse(const tools::SvRef<SotStorage> &rStorage, const rtl::OUString &rPath);
@@ -202,7 +202,7 @@ tools::SvRef<SotStorageStream> OLEStorageImpl::getStream(const rtl::OUString &rP
     return maStreams[aIt->second].stream.ref;
 }
 
-tools::SvRef<SotStorageStream> OLEStorageImpl::getStream(const std::size_t nId)
+tools::SvRef<SotStorageStream> const & OLEStorageImpl::getStream(const std::size_t nId)
 {
     if (!maStreams[nId].stream.ref.Is())
         maStreams[nId].stream.ref = createStream(rtl::OStringToOUString(maStreams[nId].name, RTL_TEXTENCODING_UTF8));
diff --git a/xmlhelp/source/cxxhelp/provider/urlparameter.cxx b/xmlhelp/source/cxxhelp/provider/urlparameter.cxx
index 471ffc6a5008..7792e65e4dcb 100644
--- a/xmlhelp/source/cxxhelp/provider/urlparameter.cxx
+++ b/xmlhelp/source/cxxhelp/provider/urlparameter.cxx
@@ -127,7 +127,7 @@ OString URLParameter::getByName( const char* par )
 }
 
 
-OUString URLParameter::get_id()
+OUString const & URLParameter::get_id()
 {
     if( m_aId == "start" )
     {   // module is set
@@ -171,7 +171,7 @@ OUString URLParameter::get_title()
 }
 
 
-OUString URLParameter::get_language()
+OUString const & URLParameter::get_language()
 {
     if( m_aLanguage.isEmpty() )
         return m_aDefaultLanguage;
@@ -180,7 +180,7 @@ OUString URLParameter::get_language()
 }
 
 
-OUString URLParameter::get_program()
+OUString const & URLParameter::get_program()
 {
     if( m_aProgram.isEmpty() )
     {
diff --git a/xmlhelp/source/cxxhelp/provider/urlparameter.hxx b/xmlhelp/source/cxxhelp/provider/urlparameter.hxx
index 3d48807b0fc7..294a47396641 100644
--- a/xmlhelp/source/cxxhelp/provider/urlparameter.hxx
+++ b/xmlhelp/source/cxxhelp/provider/urlparameter.hxx
@@ -121,7 +121,7 @@ namespace chelp {
         bool isRoot() const { return m_aModule.isEmpty(); }
         bool isErrorDocument();
 
-        OUString get_id();
+        OUString const & get_id();
 
         OUString get_tag();
 
@@ -139,7 +139,7 @@ namespace chelp {
 
         const OUString& get_module() const { return m_aModule; }
 
-        OUString get_dbpar() const
+        OUString const & get_dbpar() const
         {
             if( !m_aDbPar.isEmpty() )
                 return m_aDbPar;
@@ -149,9 +149,9 @@ namespace chelp {
 
         const OUString& get_prefix() const { return m_aPrefix; }
 
-        OUString get_language();
+        OUString const & get_language();
 
-        OUString get_program();
+        OUString const & get_program();
 
         const OUString& get_query() const { return m_aQuery; }
 
diff --git a/xmlhelp/source/treeview/tvread.cxx b/xmlhelp/source/treeview/tvread.cxx
index c93e5b90b94a..b3b0f1569f12 100644
--- a/xmlhelp/source/treeview/tvread.cxx
+++ b/xmlhelp/source/treeview/tvread.cxx
@@ -126,7 +126,7 @@ namespace treeview {
                                     RTL_TEXTENCODING_UTF8 );
         }
 
-        OUString getTargetURL()
+        OUString const & getTargetURL()
         {
             if( targetURL.isEmpty() )
             {
diff --git a/xmloff/inc/txtfldi.hxx b/xmloff/inc/txtfldi.hxx
index 04d1abe754d5..b6b2a6b8de81 100644
--- a/xmloff/inc/txtfldi.hxx
+++ b/xmloff/inc/txtfldi.hxx
@@ -160,7 +160,7 @@ protected:
     const OUString& GetServiceName() { return sServiceName; }
     inline void SetServiceName(const OUString& sStr) { sServiceName = sStr; }
 
-    OUString GetContent();
+    OUString const & GetContent();
 
     /// process attribute values
     virtual void ProcessAttribute( sal_uInt16 nAttrToken,
diff --git a/xmloff/source/text/XMLRedlineExport.cxx b/xmloff/source/text/XMLRedlineExport.cxx
index 8a5a062c5cfc..baf0d6de8760 100644
--- a/xmloff/source/text/XMLRedlineExport.cxx
+++ b/xmloff/source/text/XMLRedlineExport.cxx
@@ -421,7 +421,7 @@ void XMLRedlineExport::ExportChangedRegion(
 }
 
 
-const OUString XMLRedlineExport::ConvertTypeName(
+OUString const & XMLRedlineExport::ConvertTypeName(
     const OUString& sApiName)
 {
     if (sApiName == sDelete)
diff --git a/xmloff/source/text/XMLRedlineExport.hxx b/xmloff/source/text/XMLRedlineExport.hxx
index 5ef3d2e9de24..3e43e5653a71 100644
--- a/xmloff/source/text/XMLRedlineExport.hxx
+++ b/xmloff/source/text/XMLRedlineExport.hxx
@@ -171,7 +171,7 @@ private:
         const css::uno::Sequence<css::beans::PropertyValue> & rValues);
 
     /// convert the change type from API to XML names
-    const OUString ConvertTypeName(const OUString& sApiName);
+    OUString const & ConvertTypeName(const OUString& sApiName);
 
     /// Get ID string!
     const OUString GetRedlineID(
diff --git a/xmloff/source/text/txtfldi.cxx b/xmloff/source/text/txtfldi.cxx
index 438c9783fe90..0bc857a3db83 100644
--- a/xmloff/source/text/txtfldi.cxx
+++ b/xmloff/source/text/txtfldi.cxx
@@ -224,7 +224,7 @@ void XMLTextFieldImportContext::StartElement(
 XMLTextFieldImportContext::~XMLTextFieldImportContext() {
 }
 
-OUString XMLTextFieldImportContext::GetContent()
+OUString const & XMLTextFieldImportContext::GetContent()
 {
     if (sContent.isEmpty())
     {
diff --git a/xmlsecurity/source/helper/xsecctl.hxx b/xmlsecurity/source/helper/xsecctl.hxx
index c496955c19b8..1b8222acd420 100644
--- a/xmlsecurity/source/helper/xsecctl.hxx
+++ b/xmlsecurity/source/helper/xsecctl.hxx
@@ -462,7 +462,7 @@ public:
      */
     void collectToVerify( const OUString& referenceId );
     void addSignature( sal_Int32 nSignatureId );
-    css::uno::Reference< css::xml::sax::XDocumentHandler > createSignatureReader(sal_Int32 nType = 0);
+    css::uno::Reference< css::xml::sax::XDocumentHandler > const & createSignatureReader(sal_Int32 nType = 0);
     void releaseSignatureReader();
 
 public:
diff --git a/xmlsecurity/source/helper/xsecverify.cxx b/xmlsecurity/source/helper/xsecverify.cxx
index f0801a09e23a..bded4f875ccb 100644
--- a/xmlsecurity/source/helper/xsecverify.cxx
+++ b/xmlsecurity/source/helper/xsecverify.cxx
@@ -398,7 +398,7 @@ void XSecController::addSignature( sal_Int32 nSignatureId )
     m_bVerifyCurrentSignature = true;
 }
 
-cssu::Reference< cssxs::XDocumentHandler > XSecController::createSignatureReader(sal_Int32 nType)
+cssu::Reference< cssxs::XDocumentHandler > const & XSecController::createSignatureReader(sal_Int32 nType)
 {
     if (nType == embed::StorageFormats::OFOPXML)
         m_xSecParser = new OOXMLSecParser(this);
author	Noel Grandin <noel@peralex.com>	2016-07-18 09:22:27 +0200
committer	Noel Grandin <noelgrandin@gmail.com>	2016-07-27 06:48:25 +0000
commit	508c95f1b655d9cfa6be37a5a9de9aff6fd383bf (patch)
tree	d1c8626818cbf26a699875ae2d82f751a1657e92
parent	9f4af777a832d8a0b9a21d793d421fa6228131e0 (diff)