diff --git a/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp b/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
index fce826cd97..893eb178e1 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintFluidBoundary.cpp
@@ -342,7 +342,7 @@ TaskFemConstraintFluidBoundary::TaskFemConstraintFluidBoundary(
     updateUI();
 }
 
-const Fem::FemSolverObject* TaskFemConstraintFluidBoundary::getFemSolver(void) const
+const Fem::FemSolverObject* TaskFemConstraintFluidBoundary::getFemSolver() const
 {
     return pcSolver;
 }
@@ -535,7 +535,7 @@ void TaskFemConstraintFluidBoundary::updateThermalBoundaryUI()
     }
 }
 
-void TaskFemConstraintFluidBoundary::onBoundaryTypeChanged(void)
+void TaskFemConstraintFluidBoundary::onBoundaryTypeChanged()
 {
     Fem::ConstraintFluidBoundary* pcConstraint =
         static_cast<Fem::ConstraintFluidBoundary*>(ConstraintView->getObject());
@@ -556,7 +556,7 @@ void TaskFemConstraintFluidBoundary::onBoundaryTypeChanged(void)
     }
 }
 
-void TaskFemConstraintFluidBoundary::onSubtypeChanged(void)
+void TaskFemConstraintFluidBoundary::onSubtypeChanged()
 {
     updateSubtypeUI();// todo: change color for different kind of subtype,
                       // Fem::ConstraintFluidBoundary::onChanged() and viewProvider
@@ -566,7 +566,7 @@ void TaskFemConstraintFluidBoundary::onBoundaryValueChanged(double)
 {
     //left empty for future extension
 }
-void TaskFemConstraintFluidBoundary::onTurbulenceSpecificationChanged(void)
+void TaskFemConstraintFluidBoundary::onTurbulenceSpecificationChanged()
 {
     Fem::ConstraintFluidBoundary* pcConstraint =
         static_cast<Fem::ConstraintFluidBoundary*>(ConstraintView->getObject());
@@ -575,7 +575,7 @@ void TaskFemConstraintFluidBoundary::onTurbulenceSpecificationChanged(void)
     updateTurbulenceUI();
 }
 
-void TaskFemConstraintFluidBoundary::onThermalBoundaryTypeChanged(void)
+void TaskFemConstraintFluidBoundary::onThermalBoundaryTypeChanged()
 {
     Fem::ConstraintFluidBoundary* pcConstraint =
         static_cast<Fem::ConstraintFluidBoundary*>(ConstraintView->getObject());
@@ -668,23 +668,23 @@ void TaskFemConstraintFluidBoundary::onCheckReverse(const bool pressed)
     pcConstraint->Reversed.setValue(pressed);
 }
 
-std::string TaskFemConstraintFluidBoundary::getBoundaryType(void) const
+std::string TaskFemConstraintFluidBoundary::getBoundaryType() const
 {
     return Base::Tools::toStdString(ui->comboBoundaryType->currentText());
 }
 
-std::string TaskFemConstraintFluidBoundary::getSubtype(void) const
+std::string TaskFemConstraintFluidBoundary::getSubtype() const
 {
     return Base::Tools::toStdString(ui->comboSubtype->currentText());
 }
 
-double TaskFemConstraintFluidBoundary::getBoundaryValue(void) const
+double TaskFemConstraintFluidBoundary::getBoundaryValue() const
 {
     return ui->spinBoundaryValue->value();
 }
 
 
-std::string TaskFemConstraintFluidBoundary::getTurbulenceModel(void) const
+std::string TaskFemConstraintFluidBoundary::getTurbulenceModel() const
 {
     if (pTurbulenceModel) {
         return pTurbulenceModel->getValueAsString();
@@ -694,22 +694,22 @@ std::string TaskFemConstraintFluidBoundary::getTurbulenceModel(void) const
     }
 }
 
-std::string TaskFemConstraintFluidBoundary::getTurbulenceSpecification(void) const
+std::string TaskFemConstraintFluidBoundary::getTurbulenceSpecification() const
 {
     return Base::Tools::toStdString(ui->comboTurbulenceSpecification->currentText());
 }
 
-double TaskFemConstraintFluidBoundary::getTurbulentIntensityValue(void) const
+double TaskFemConstraintFluidBoundary::getTurbulentIntensityValue() const
 {
     return ui->spinTurbulentIntensityValue->value();
 }
 
-double TaskFemConstraintFluidBoundary::getTurbulentLengthValue(void) const
+double TaskFemConstraintFluidBoundary::getTurbulentLengthValue() const
 {
     return ui->spinTurbulentLengthValue->value();
 }
 
-bool TaskFemConstraintFluidBoundary::getHeatTransferring(void) const
+bool TaskFemConstraintFluidBoundary::getHeatTransferring() const
 {
     if (pHeatTransferring) {
         return pHeatTransferring->getValue();
@@ -719,22 +719,22 @@ bool TaskFemConstraintFluidBoundary::getHeatTransferring(void) const
     }
 }
 
-std::string TaskFemConstraintFluidBoundary::getThermalBoundaryType(void) const
+std::string TaskFemConstraintFluidBoundary::getThermalBoundaryType() const
 {
     return Base::Tools::toStdString(ui->comboThermalBoundaryType->currentText());
 }
 
-double TaskFemConstraintFluidBoundary::getTemperatureValue(void) const
+double TaskFemConstraintFluidBoundary::getTemperatureValue() const
 {
     return ui->spinTemperatureValue->value();
 }
 
-double TaskFemConstraintFluidBoundary::getHeatFluxValue(void) const
+double TaskFemConstraintFluidBoundary::getHeatFluxValue() const
 {
     return ui->spinHeatFluxValue->value();
 }
 
-double TaskFemConstraintFluidBoundary::getHTCoeffValue(void) const
+double TaskFemConstraintFluidBoundary::getHTCoeffValue() const
 {
     return ui->spinHTCoeffValue->value();
 }
@@ -749,7 +749,7 @@ const std::string TaskFemConstraintFluidBoundary::getReferences() const
     return TaskFemConstraint::getReferences(items);
 }
 
-const std::string TaskFemConstraintFluidBoundary::getDirectionName(void) const
+const std::string TaskFemConstraintFluidBoundary::getDirectionName() const
 {
     std::string dir = ui->lineDirection->text().toStdString();
     if (dir.empty())
@@ -759,7 +759,7 @@ const std::string TaskFemConstraintFluidBoundary::getDirectionName(void) const
     return dir.substr(0, pos).c_str();
 }
 
-const std::string TaskFemConstraintFluidBoundary::getDirectionObject(void) const
+const std::string TaskFemConstraintFluidBoundary::getDirectionObject() const
 {
     std::string dir = ui->lineDirection->text().toStdString();
     if (dir.empty())
diff --git a/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp b/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp
index 7e734774db..5da3b8b6cd 100644
--- a/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderAnalysis.cpp
@@ -117,7 +117,7 @@ void ViewProviderFemAnalysis::highlightView(Gui::ViewProviderDocumentObject *vie
     extension.highlightView(view);
 }
 
-bool ViewProviderFemAnalysis::doubleClicked(void)
+bool ViewProviderFemAnalysis::doubleClicked()
 {
     Gui::Command::assureWorkbench("FemWorkbench");
     Gui::Command::addModule(Gui::Command::Gui, "FemGui");
@@ -137,22 +137,22 @@ bool ViewProviderFemAnalysis::doubleClicked(void)
     return true;
 }
 
-std::vector<App::DocumentObject *> ViewProviderFemAnalysis::claimChildren(void) const
+std::vector<App::DocumentObject *> ViewProviderFemAnalysis::claimChildren() const
 {
     return Gui::ViewProviderDocumentObjectGroup::claimChildren();
 }
 
-std::vector<std::string> ViewProviderFemAnalysis::getDisplayModes(void) const
+std::vector<std::string> ViewProviderFemAnalysis::getDisplayModes() const
 {
     return {"Analysis"};
 }
 
-void ViewProviderFemAnalysis::hide(void)
+void ViewProviderFemAnalysis::hide()
 {
     Gui::ViewProviderDocumentObjectGroup::hide();
 }
 
-void ViewProviderFemAnalysis::show(void)
+void ViewProviderFemAnalysis::show()
 {
     Gui::ViewProviderDocumentObjectGroup::show();
 }
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp
index 770f7a4fd4..340e5fd638 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostPipeline.cpp
@@ -206,7 +206,7 @@ void ViewProviderFemPostPipeline::scaleField(vtkDataSet* dset, vtkDataArray* pda
     }
 }
 
-PyObject *ViewProviderFemPostPipeline::getPyObject(void)
+PyObject *ViewProviderFemPostPipeline::getPyObject()
 {
     if (PythonObject.is(Py::_None())) {
         // ref counter is set to 1
diff --git a/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp b/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp
index 55fa595100..070c671442 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemPostPipelinePyImp.cpp
@@ -31,7 +31,7 @@
 using namespace FemGui;
 
 // returns a string which represents the object e.g. when printed in python
-std::string ViewProviderFemPostPipelinePy::representation(void) const
+std::string ViewProviderFemPostPipelinePy::representation() const
 {
     return std::string("<ViewProviderFemPostPipeline object>");
 }
diff --git a/src/Mod/Import/App/StepShapePyImp.cpp b/src/Mod/Import/App/StepShapePyImp.cpp
index 94b93de982..a2a2686313 100644
--- a/src/Mod/Import/App/StepShapePyImp.cpp
+++ b/src/Mod/Import/App/StepShapePyImp.cpp
@@ -29,7 +29,7 @@
 using namespace Import;
 
 // returns a string which represents the object e.g. when printed in python
-std::string StepShapePy::representation(void) const
+std::string StepShapePy::representation() const
 {
     return std::string("<StepShape object>");
 }
diff --git a/src/Mod/Import/App/dxf/dxf.cpp b/src/Mod/Import/App/dxf/dxf.cpp
index 710318760f..fb436a0e3d 100644
--- a/src/Mod/Import/App/dxf/dxf.cpp
+++ b/src/Mod/Import/App/dxf/dxf.cpp
@@ -74,7 +74,7 @@ CDxfWrite::~CDxfWrite()
     delete m_ssLayer;
 }
 
-void CDxfWrite::init(void)
+void CDxfWrite::init()
 {
     writeHeaderSection();
     makeBlockRecordTableHead();
@@ -82,7 +82,7 @@ void CDxfWrite::init(void)
 }
 
 //! assemble pieces into output file
-void CDxfWrite::endRun(void)
+void CDxfWrite::endRun()
 {
     makeLayerTable();
     makeBlockRecordTableBody();
@@ -100,7 +100,7 @@ void CDxfWrite::endRun(void)
 //***************************
 //writeHeaderSection
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeHeaderSection(void)
+void CDxfWrite::writeHeaderSection()
 {
     std::stringstream ss;
     ss << "FreeCAD v"
@@ -125,7 +125,7 @@ void CDxfWrite::writeHeaderSection(void)
 //***************************
 //writeClassesSection
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeClassesSection(void)
+void CDxfWrite::writeClassesSection()
 {
     if (m_version < 14) {
         return;
@@ -141,7 +141,7 @@ void CDxfWrite::writeClassesSection(void)
 //***************************
 //writeTablesSection
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeTablesSection(void)
+void CDxfWrite::writeTablesSection()
 {
     //static tables section head end content
     std::stringstream ss;
@@ -170,7 +170,7 @@ void CDxfWrite::writeTablesSection(void)
 //***************************
 //makeLayerTable
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::makeLayerTable(void)
+void CDxfWrite::makeLayerTable()
 {
     std::string tablehash = getLayerHandle();
     (*m_ssLayer) << "  0"      << endl;
@@ -238,7 +238,7 @@ void CDxfWrite::makeLayerTable(void)
 //***************************
 //makeBlockRecordTableHead
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::makeBlockRecordTableHead(void)
+void CDxfWrite::makeBlockRecordTableHead()
 {
     if (m_version < 14) {
         return;
@@ -294,7 +294,7 @@ void CDxfWrite::makeBlockRecordTableHead(void)
 //***************************
 //makeBlockRecordTableBody
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::makeBlockRecordTableBody(void)
+void CDxfWrite::makeBlockRecordTableBody()
 {
     if (m_version < 14) {
         return;
@@ -323,7 +323,7 @@ void CDxfWrite::makeBlockRecordTableBody(void)
 //***************************
 //makeBlockSectionHead
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::makeBlockSectionHead(void)
+void CDxfWrite::makeBlockSectionHead()
 {
     (*m_ssBlock) << "  0"          << endl;
     (*m_ssBlock) << "SECTION"      << endl;
@@ -451,7 +451,7 @@ std::string CDxfWrite::getPlateFile(std::string fileSpec)
     return outString.str();
 }
 
-std::string CDxfWrite::getHandle(void)
+std::string CDxfWrite::getHandle()
 {
     m_handle++;
     std::stringstream ss;
@@ -460,7 +460,7 @@ std::string CDxfWrite::getHandle(void)
     return ss.str();
 }
 
-std::string CDxfWrite::getEntityHandle(void)
+std::string CDxfWrite::getEntityHandle()
 {
     return getHandle();
 //    m_entityHandle++;
@@ -470,7 +470,7 @@ std::string CDxfWrite::getEntityHandle(void)
 //    return ss.str();
 }
 
-std::string CDxfWrite::getLayerHandle(void)
+std::string CDxfWrite::getLayerHandle()
 {
     return getHandle();
 //    m_layerHandle++;
@@ -480,7 +480,7 @@ std::string CDxfWrite::getLayerHandle(void)
 //    return ss.str();
 }
 
-std::string CDxfWrite::getBlockHandle(void)
+std::string CDxfWrite::getBlockHandle()
 {
     return getHandle();
 //    m_blockHandle++;
@@ -490,7 +490,7 @@ std::string CDxfWrite::getBlockHandle(void)
 //    return ss.str();
 }
 
-std::string CDxfWrite::getBlkRecordHandle(void)
+std::string CDxfWrite::getBlkRecordHandle()
 {
     return getHandle();
 //    m_blkRecordHandle++;
@@ -1378,7 +1378,7 @@ void CDxfWrite::writeDiametricDim(const double* textMidPoint,
 //***************************
 //writeDimBlockPreamble
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeDimBlockPreamble(void)
+void CDxfWrite::writeDimBlockPreamble()
 {
     if (m_version > 12) {
         std::string blockName("*");
@@ -1423,7 +1423,7 @@ void CDxfWrite::writeDimBlockPreamble(void)
 //***************************
 //writeBlockTrailer
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeBlockTrailer(void)
+void CDxfWrite::writeBlockTrailer()
 {
     (*m_ssBlock) << "  0"    << endl;
     (*m_ssBlock) << "ENDBLK" << endl;
@@ -1696,7 +1696,7 @@ void CDxfWrite::writeDiametricDimBlock(const double* textMidPoint,
 //***************************
 //writeBlocksSection
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeBlocksSection(void)
+void CDxfWrite::writeBlocksSection()
 {
     if (m_version < 14) {
         std::stringstream ss;
@@ -1715,7 +1715,7 @@ void CDxfWrite::writeBlocksSection(void)
 //***************************
 //writeEntitiesSection
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeEntitiesSection(void)
+void CDxfWrite::writeEntitiesSection()
 {
     std::stringstream ss;
     ss << "entities" << m_version << ".rub";
@@ -1733,7 +1733,7 @@ void CDxfWrite::writeEntitiesSection(void)
 //***************************
 //writeObjectsSection
 //added by Wandererfan 2018 (wandererfan@gmail.com) for FreeCAD project
-void CDxfWrite::writeObjectsSection(void)
+void CDxfWrite::writeObjectsSection()
 {
     if (m_version < 14) {
         return;
diff --git a/src/Mod/Import/App/dxf/dxf.h b/src/Mod/Import/App/dxf/dxf.h
index 43bd41aa38..b7bf67c69d 100644
--- a/src/Mod/Import/App/dxf/dxf.h
+++ b/src/Mod/Import/App/dxf/dxf.h
@@ -156,11 +156,11 @@ protected:
     //! copy boiler plate file
     std::string getPlateFile(std::string fileSpec);
     void setDataDir(std::string s) { m_dataDir = s; }
-    std::string getHandle(void);
-    std::string getEntityHandle(void);
-    std::string getLayerHandle(void);
-    std::string getBlockHandle(void);
-    std::string getBlkRecordHandle(void);
+    std::string getHandle();
+    std::string getEntityHandle();
+    std::string getLayerHandle();
+    std::string getBlockHandle();
+    std::string getBlkRecordHandle();
 
     std::string m_optionSource;
     int m_version;
@@ -186,8 +186,8 @@ public:
     ImportExport CDxfWrite(const char* filepath);
     ImportExport ~CDxfWrite();
     
-    ImportExport void init(void);
-    ImportExport void endRun(void);
+    ImportExport void init();
+    ImportExport void endRun();
 
     ImportExport bool Failed(){return m_fail;}
 //    void setOptions(void);
@@ -237,19 +237,19 @@ public:
                          const char* dimText);
 
     ImportExport void writeDimBlockPreamble();
-    ImportExport void writeBlockTrailer(void);
+    ImportExport void writeBlockTrailer();
 
-    ImportExport void writeHeaderSection(void);
-    ImportExport void writeTablesSection(void);
-    ImportExport void writeBlocksSection(void);
-    ImportExport void writeEntitiesSection(void);
-    ImportExport void writeObjectsSection(void);
-    ImportExport void writeClassesSection(void);
+    ImportExport void writeHeaderSection();
+    ImportExport void writeTablesSection();
+    ImportExport void writeBlocksSection();
+    ImportExport void writeEntitiesSection();
+    ImportExport void writeObjectsSection();
+    ImportExport void writeClassesSection();
 
-    ImportExport void makeLayerTable(void);
-    ImportExport void makeBlockRecordTableHead(void);
-    ImportExport void makeBlockRecordTableBody(void);
-    ImportExport void makeBlockSectionHead(void);
+    ImportExport void makeLayerTable();
+    ImportExport void makeBlockRecordTableHead();
+    ImportExport void makeBlockRecordTableBody();
+    ImportExport void makeBlockSectionHead();
 };
 
 // derive a class from this and implement it's virtual functions
diff --git a/src/Mod/Inspection/App/InspectionFeature.cpp b/src/Mod/Inspection/App/InspectionFeature.cpp
index 44384a8575..8a45be6a75 100644
--- a/src/Mod/Inspection/App/InspectionFeature.cpp
+++ b/src/Mod/Inspection/App/InspectionFeature.cpp
@@ -160,7 +160,7 @@ namespace Inspection {
             // do nothing
         }
 
-        void Validate (void)
+        void Validate ()
         {
             // do nothing
         }
@@ -182,7 +182,7 @@ namespace Inspection {
             // do nothing
         }
 
-        unsigned long HasElements (void) const override
+        unsigned long HasElements () const override
         {
             return _pclMesh->CountFacets();
         }
@@ -224,7 +224,7 @@ namespace Inspection {
                 _aulGrid[ulX1][ulY1][ulZ1].insert(ulFacetIndex);
         }
 
-        void InitGrid (void) override
+        void InitGrid () override
         {
             unsigned long i, j;
 
@@ -252,7 +252,7 @@ namespace Inspection {
             }
         }
 
-        void RebuildGrid (void) override
+        void RebuildGrid () override
         {
             _ulCtElements = _pclMesh->CountFacets();
             InitGrid();
@@ -552,7 +552,7 @@ void PropertyDistanceList::setSize(int newSize)
     _lValueList.resize(newSize);
 }
 
-int PropertyDistanceList::getSize(void) const
+int PropertyDistanceList::getSize() const
 {
     return static_cast<int>(_lValueList.size());
 }
@@ -572,7 +572,7 @@ void PropertyDistanceList::setValues(const std::vector<float>& values)
     hasSetValue();
 }
 
-PyObject *PropertyDistanceList::getPyObject(void)
+PyObject *PropertyDistanceList::getPyObject()
 {
     PyObject* list = PyList_New(getSize());
     for (int i = 0;i<getSize(); i++)
@@ -659,7 +659,7 @@ void PropertyDistanceList::RestoreDocFile(Base::Reader &reader)
     setValues(values);
 }
 
-App::Property *PropertyDistanceList::Copy(void) const
+App::Property *PropertyDistanceList::Copy() const
 {
     PropertyDistanceList *p= new PropertyDistanceList();
     p->_lValueList = _lValueList;
@@ -673,7 +673,7 @@ void PropertyDistanceList::Paste(const App::Property &from)
     hasSetValue();
 }
 
-unsigned int PropertyDistanceList::getMemSize (void) const
+unsigned int PropertyDistanceList::getMemSize () const
 {
     return static_cast<unsigned int>(_lValueList.size() * sizeof(float));
 }
@@ -763,7 +763,7 @@ short Feature::mustExecute() const
     return 0;
 }
 
-App::DocumentObjectExecReturn* Feature::execute(void)
+App::DocumentObjectExecReturn* Feature::execute()
 {
     bool useMultithreading = true;
 
diff --git a/src/Mod/Inspection/Gui/AppInspectionGui.cpp b/src/Mod/Inspection/Gui/AppInspectionGui.cpp
index 405d4c788a..2038d46923 100644
--- a/src/Mod/Inspection/Gui/AppInspectionGui.cpp
+++ b/src/Mod/Inspection/Gui/AppInspectionGui.cpp
@@ -32,7 +32,7 @@
 
 
 // use a different name to CreateCommand()
-void CreateInspectionCommands(void);
+void CreateInspectionCommands();
 
 
 namespace InspectionGui {
diff --git a/src/Mod/Inspection/Gui/Command.cpp b/src/Mod/Inspection/Gui/Command.cpp
index 4767190cf5..659d8a63cf 100644
--- a/src/Mod/Inspection/Gui/Command.cpp
+++ b/src/Mod/Inspection/Gui/Command.cpp
@@ -58,7 +58,7 @@ void CmdVisualInspection::activated(int)
     dlg.exec();
 }
 
-bool CmdVisualInspection::isActive(void)
+bool CmdVisualInspection::isActive()
 {
     return App::GetApplication().getActiveDocument();
 }
@@ -95,7 +95,7 @@ void CmdInspectElement::activated(int)
      }
 }
 
-bool CmdInspectElement::isActive(void)
+bool CmdInspectElement::isActive()
 {
     App::Document* doc = App::GetApplication().getActiveDocument();
     if (!doc || doc->countObjectsOfType(Inspection::Feature::getClassTypeId()) == 0)
@@ -110,7 +110,7 @@ bool CmdInspectElement::isActive(void)
     return false;
 }
 
-void CreateInspectionCommands(void)
+void CreateInspectionCommands()
 {
     Gui::CommandManager &rcCmdMgr = Gui::Application::Instance->commandManager();
     rcCmdMgr.addCommand(new CmdVisualInspection());
diff --git a/src/Mod/Mesh/Gui/Command.cpp b/src/Mod/Mesh/Gui/Command.cpp
index 726750bfdf..bb7d759935 100644
--- a/src/Mod/Mesh/Gui/Command.cpp
+++ b/src/Mod/Mesh/Gui/Command.cpp
@@ -833,7 +833,7 @@ void CmdMeshTrimByPlane::activated(int)
     doCommand(Doc,"import MeshPartGui, FreeCADGui\nFreeCADGui.runCommand('MeshPart_TrimByPlane')\n");
 }
 
-bool CmdMeshTrimByPlane::isActive(void)
+bool CmdMeshTrimByPlane::isActive()
 {
     // Check for the selected mesh feature (all Mesh types)
     if (getSelection().countObjectsOfType(Mesh::Feature::getClassTypeId()) != 1)
@@ -891,7 +891,7 @@ void CmdMeshCrossSections::activated(int)
     doCommand(Doc,"import MeshPartGui, FreeCADGui\nFreeCADGui.runCommand('MeshPart_CrossSections')\n");
 }
 
-bool CmdMeshCrossSections::isActive(void)
+bool CmdMeshCrossSections::isActive()
 {
     return (Gui::Selection().countObjectsOfType(Mesh::Feature::getClassTypeId()) > 0 &&
             !Gui::Control().activeDialog());
diff --git a/src/Mod/Mesh/Gui/Workbench.cpp b/src/Mod/Mesh/Gui/Workbench.cpp
index 694fe048de..b0fe076f45 100644
--- a/src/Mod/Mesh/Gui/Workbench.cpp
+++ b/src/Mod/Mesh/Gui/Workbench.cpp
@@ -105,7 +105,7 @@ public:
         taskbox->groupLayout()->addWidget(box);
         Content.push_back(taskbox);
     }
-    bool shouldShow(void) override
+    bool shouldShow() override
     {
         return true;
     }
diff --git a/src/Mod/MeshPart/Gui/CrossSections.cpp b/src/Mod/MeshPart/Gui/CrossSections.cpp
index 4fdc946351..473f9514a7 100644
--- a/src/Mod/MeshPart/Gui/CrossSections.cpp
+++ b/src/Mod/MeshPart/Gui/CrossSections.cpp
@@ -94,7 +94,7 @@ public:
     {
         return "";
     }
-    std::vector<std::string> getDisplayModes(void) const override
+    std::vector<std::string> getDisplayModes() const override
     {
         return std::vector<std::string>();
     }
diff --git a/src/Mod/Path/Gui/ViewProviderArea.h b/src/Mod/Path/Gui/ViewProviderArea.h
index c96077acb6..22d458e554 100644
--- a/src/Mod/Path/Gui/ViewProviderArea.h
+++ b/src/Mod/Path/Gui/ViewProviderArea.h
@@ -62,7 +62,7 @@ class PathGuiExport ViewProviderAreaView : public PartGui::ViewProviderPlanePara
 public:
     ViewProviderAreaView();
     ~ViewProviderAreaView() override;
-    std::vector<App::DocumentObject*> claimChildren(void) const override;
+    std::vector<App::DocumentObject*> claimChildren() const override;
     void updateData(const App::Property*) override;
     bool onDelete(const std::vector<std::string> &) override;
 
diff --git a/src/Mod/ReverseEngineering/Gui/AppReverseEngineeringGui.cpp b/src/Mod/ReverseEngineering/Gui/AppReverseEngineeringGui.cpp
index 28e475f8d6..17c8f427b9 100644
--- a/src/Mod/ReverseEngineering/Gui/AppReverseEngineeringGui.cpp
+++ b/src/Mod/ReverseEngineering/Gui/AppReverseEngineeringGui.cpp
@@ -32,7 +32,7 @@
 
 
 // use a different name to CreateCommand()
-void CreateReverseEngineeringCommands(void);
+void CreateReverseEngineeringCommands();
 
 void loadReverseEngineeringResource()
 {
diff --git a/src/Mod/ReverseEngineering/Gui/Command.cpp b/src/Mod/ReverseEngineering/Gui/Command.cpp
index 176fc3f606..a97766da92 100644
--- a/src/Mod/ReverseEngineering/Gui/Command.cpp
+++ b/src/Mod/ReverseEngineering/Gui/Command.cpp
@@ -90,7 +90,7 @@ void CmdApproxSurface::activated(int)
     Gui::Control().showDialog(new ReenGui::TaskFitBSplineSurface(objT));
 }
 
-bool CmdApproxSurface::isActive(void)
+bool CmdApproxSurface::isActive()
 {
     return (hasActiveDocument() && !Gui::Control().activeDialog());
 }
@@ -189,7 +189,7 @@ void CmdApproxPlane::activated(int)
     }
 }
 
-bool CmdApproxPlane::isActive(void)
+bool CmdApproxPlane::isActive()
 {
     if (getSelection().countObjectsOfType(App::GeoFeature::getClassTypeId()) == 1)
         return true;
@@ -255,7 +255,7 @@ void CmdApproxCylinder::activated(int)
     updateActive();
 }
 
-bool CmdApproxCylinder::isActive(void)
+bool CmdApproxCylinder::isActive()
 {
     if (getSelection().countObjectsOfType(Mesh::Feature::getClassTypeId()) > 0)
         return true;
@@ -302,7 +302,7 @@ void CmdApproxSphere::activated(int)
     updateActive();
 }
 
-bool CmdApproxSphere::isActive(void)
+bool CmdApproxSphere::isActive()
 {
     if (getSelection().countObjectsOfType(Mesh::Feature::getClassTypeId()) > 0)
         return true;
@@ -357,7 +357,7 @@ void CmdApproxPolynomial::activated(int)
     updateActive();
 }
 
-bool CmdApproxPolynomial::isActive(void)
+bool CmdApproxPolynomial::isActive()
 {
     if (getSelection().countObjectsOfType(Mesh::Feature::getClassTypeId()) > 0)
         return true;
@@ -388,7 +388,7 @@ void CmdSegmentation::activated(int)
     Gui::Control().showDialog(dlg);
 }
 
-bool CmdSegmentation::isActive(void)
+bool CmdSegmentation::isActive()
 {
     if (Gui::Control().activeDialog())
         return false;
@@ -418,7 +418,7 @@ void CmdSegmentationManual::activated(int)
     Gui::Control().showDialog(dlg);
 }
 
-bool CmdSegmentationManual::isActive(void)
+bool CmdSegmentationManual::isActive()
 {
     if (Gui::Control().activeDialog())
         return false;
@@ -468,7 +468,7 @@ void CmdSegmentationFromComponents::activated(int)
     doc->recompute();
 }
 
-bool CmdSegmentationFromComponents::isActive(void)
+bool CmdSegmentationFromComponents::isActive()
 {
     if (getSelection().countObjectsOfType(Mesh::Feature::getClassTypeId()) > 0)
         return true;
@@ -535,7 +535,7 @@ void CmdMeshBoundary::activated(int)
     document->commitTransaction();
 }
 
-bool CmdMeshBoundary::isActive(void)
+bool CmdMeshBoundary::isActive()
 {
     return Gui::Selection().countObjectsOfType
         (Mesh::Feature::getClassTypeId()) > 0;
@@ -570,7 +570,7 @@ void CmdPoissonReconstruction::activated(int)
     Gui::Control().showDialog(new ReenGui::TaskPoisson(objT));
 }
 
-bool CmdPoissonReconstruction::isActive(void)
+bool CmdPoissonReconstruction::isActive()
 {
     return (hasActiveDocument() && !Gui::Control().activeDialog());
 }
@@ -620,12 +620,12 @@ void CmdViewTriangulation::activated(int)
     }
 }
 
-bool CmdViewTriangulation::isActive(void)
+bool CmdViewTriangulation::isActive()
 {
     return  (Gui::Selection().countObjectsOfType(Points::Structured::getClassTypeId()) > 0);
 }
 
-void CreateReverseEngineeringCommands(void)
+void CreateReverseEngineeringCommands()
 {
     Gui::CommandManager &rcCmdMgr = Gui::Application::Instance->commandManager();
     rcCmdMgr.addCommand(new CmdApproxSurface());
diff --git a/src/Mod/ReverseEngineering/Gui/SegmentationManual.h b/src/Mod/ReverseEngineering/Gui/SegmentationManual.h
index 150498146b..dc090b83b5 100644
--- a/src/Mod/ReverseEngineering/Gui/SegmentationManual.h
+++ b/src/Mod/ReverseEngineering/Gui/SegmentationManual.h
@@ -92,7 +92,7 @@ public:
 
     QDialogButtonBox::StandardButtons getStandardButtons() const override
     { return QDialogButtonBox::Ok | QDialogButtonBox::Close; }
-    bool isAllowedAlterDocument(void) const override
+    bool isAllowedAlterDocument() const override
     { return true; }
     void modifyStandardButtons(QDialogButtonBox*) override;
 
diff --git a/src/Mod/Robot/App/Edge2TracObject.cpp b/src/Mod/Robot/App/Edge2TracObject.cpp
index 0ee5577f8d..045c316894 100644
--- a/src/Mod/Robot/App/Edge2TracObject.cpp
+++ b/src/Mod/Robot/App/Edge2TracObject.cpp
@@ -57,7 +57,7 @@ Edge2TracObject::~Edge2TracObject()
 {
 }
 
-App::DocumentObjectExecReturn *Edge2TracObject::execute(void)
+App::DocumentObjectExecReturn *Edge2TracObject::execute()
 {
     App::DocumentObject* link = Source.getValue();
     if (!link)
diff --git a/src/Mod/Robot/App/RobotAlgos.h b/src/Mod/Robot/App/RobotAlgos.h
index ff8330579e..1f24cdd0a0 100644
--- a/src/Mod/Robot/App/RobotAlgos.h
+++ b/src/Mod/Robot/App/RobotAlgos.h
@@ -37,10 +37,10 @@ class RobotExport RobotAlgos
 
 public:
 	/// Constructor
-	RobotAlgos(void);
+    RobotAlgos();
 	virtual ~RobotAlgos();
 
-    void Test(void);
+    void Test();
 };
 
 inline  KDL::Frame toFrame(const Base::Placement &To){
diff --git a/src/Mod/Robot/App/TrajectoryCompound.cpp b/src/Mod/Robot/App/TrajectoryCompound.cpp
index 8da304bc6d..de68523e98 100644
--- a/src/Mod/Robot/App/TrajectoryCompound.cpp
+++ b/src/Mod/Robot/App/TrajectoryCompound.cpp
@@ -43,7 +43,7 @@ TrajectoryCompound::~TrajectoryCompound()
 {
 }
 
-App::DocumentObjectExecReturn *TrajectoryCompound::execute(void)
+App::DocumentObjectExecReturn *TrajectoryCompound::execute()
 {
     const std::vector<DocumentObject*> &Tracs = Source.getValues();
     Robot::Trajectory result;
diff --git a/src/Mod/Robot/App/TrajectoryObject.cpp b/src/Mod/Robot/App/TrajectoryObject.cpp
index 8d0c6a31d4..71266c17b1 100644
--- a/src/Mod/Robot/App/TrajectoryObject.cpp
+++ b/src/Mod/Robot/App/TrajectoryObject.cpp
@@ -46,7 +46,7 @@ TrajectoryObject::~TrajectoryObject()
 {
 }
 
-short TrajectoryObject::mustExecute(void) const
+short TrajectoryObject::mustExecute() const
 {
     return 0;
 }
diff --git a/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp b/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp
index 57a3a61caf..643a3b72ff 100644
--- a/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp
+++ b/src/Mod/Sketcher/Gui/CommandSketcherBSpline.cpp
@@ -1376,7 +1376,7 @@ void CmdSketcherJoinCurves::activated(int iMsg)
     getSelection().clearSelection();
 }
 
-bool CmdSketcherJoinCurves::isActive(void)
+bool CmdSketcherJoinCurves::isActive()
 {
     return isSketcherBSplineActive(getActiveGuiDocument(), true);
 }
diff --git a/src/Mod/Sketcher/Gui/DrawSketchHandler.cpp b/src/Mod/Sketcher/Gui/DrawSketchHandler.cpp
index a33eaa525e..bcd2fd8c62 100644
--- a/src/Mod/Sketcher/Gui/DrawSketchHandler.cpp
+++ b/src/Mod/Sketcher/Gui/DrawSketchHandler.cpp
@@ -294,7 +294,7 @@ void DrawSketchHandler::preActivated()
     ViewProviderSketchDrawSketchHandlerAttorney::setConstraintSelectability(*sketchgui, false);
 }
 
-void DrawSketchHandler::quit(void)
+void DrawSketchHandler::quit()
 {
     assert(sketchgui);
 
@@ -307,12 +307,12 @@ void DrawSketchHandler::quit(void)
 //**************************************************************************
 // Helpers
 
-int DrawSketchHandler::getHighestVertexIndex(void)
+int DrawSketchHandler::getHighestVertexIndex()
 {
     return sketchgui->getSketchObject()->getHighestVertexIndex();
 }
 
-int DrawSketchHandler::getHighestCurveIndex(void)
+int DrawSketchHandler::getHighestCurveIndex()
 {
     return sketchgui->getSketchObject()->getHighestCurveIndex();
 }
@@ -475,7 +475,7 @@ void DrawSketchHandler::updateCursor()
         setCrosshairCursor(cursorstring);
 }
 
-void DrawSketchHandler::applyCursor(void)
+void DrawSketchHandler::applyCursor()
 {
     applyCursor(actCursor);
 }
@@ -489,7 +489,7 @@ void DrawSketchHandler::applyCursor(QCursor& newCursor)
     }
 }
 
-void DrawSketchHandler::unsetCursor(void)
+void DrawSketchHandler::unsetCursor()
 {
     Gui::MDIView* view = Gui::getMainWindow()->activeWindow();
     if (view && view->isDerivedFrom(Gui::View3DInventor::getClassTypeId())) {
@@ -995,7 +995,7 @@ void DrawSketchHandler::setPositionText(const Base::Vector2d& Pos)
     ViewProviderSketchDrawSketchHandlerAttorney::setPositionText(*sketchgui, Pos);
 }
 
-void DrawSketchHandler::resetPositionText(void)
+void DrawSketchHandler::resetPositionText()
 {
     ViewProviderSketchDrawSketchHandlerAttorney::resetPositionText(*sketchgui);
 }
@@ -1061,17 +1061,17 @@ void DrawSketchHandler::preselectAtPoint(Base::Vector2d point)
     ViewProviderSketchDrawSketchHandlerAttorney::preselectAtPoint(*sketchgui, point);
 }
 
-int DrawSketchHandler::getPreselectPoint(void) const
+int DrawSketchHandler::getPreselectPoint() const
 {
     return ViewProviderSketchDrawSketchHandlerAttorney::getPreselectPoint(*sketchgui);
 }
 
-int DrawSketchHandler::getPreselectCurve(void) const
+int DrawSketchHandler::getPreselectCurve() const
 {
     return ViewProviderSketchDrawSketchHandlerAttorney::getPreselectCurve(*sketchgui);
 }
 
-int DrawSketchHandler::getPreselectCross(void) const
+int DrawSketchHandler::getPreselectCross() const
 {
     return ViewProviderSketchDrawSketchHandlerAttorney::getPreselectCross(*sketchgui);
 }
diff --git a/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp b/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
index 22c994f5c0..3ce3667bd1 100644
--- a/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
+++ b/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
@@ -1539,7 +1539,7 @@ void TaskSketcherElements::leaveEvent(QEvent* event)
     ui->listWidgetElements->clearFocus();
 }
 
-void TaskSketcherElements::slotElementsChanged(void)
+void TaskSketcherElements::slotElementsChanged()
 {
     assert(sketchView);
     // Build up ListView with the elements
diff --git a/src/Mod/Sketcher/Gui/TaskSketcherValidation.h b/src/Mod/Sketcher/Gui/TaskSketcherValidation.h
index 8141357901..310e1f046c 100644
--- a/src/Mod/Sketcher/Gui/TaskSketcherValidation.h
+++ b/src/Mod/Sketcher/Gui/TaskSketcherValidation.h
@@ -86,7 +86,7 @@ class TaskSketcherValidation: public Gui::TaskView::TaskDialog
 public:
     explicit TaskSketcherValidation(Sketcher::SketchObject* Obj);
     ~TaskSketcherValidation() override;
-    QDialogButtonBox::StandardButtons getStandardButtons(void) const override
+    QDialogButtonBox::StandardButtons getStandardButtons() const override
     {
         return QDialogButtonBox::Close;
     }
diff --git a/src/Mod/Surface/App/Blending/FeatureBlendCurve.cpp b/src/Mod/Surface/App/Blending/FeatureBlendCurve.cpp
index 0a6f4a18a9..0964bcdc2c 100644
--- a/src/Mod/Surface/App/Blending/FeatureBlendCurve.cpp
+++ b/src/Mod/Surface/App/Blending/FeatureBlendCurve.cpp
@@ -127,7 +127,7 @@ BlendPoint FeatureBlendCurve::GetBlendPoint(App::PropertyLinkSub &link, App::Pro
     return bp;
 }
 
-App::DocumentObjectExecReturn *FeatureBlendCurve::execute(void)
+App::DocumentObjectExecReturn *FeatureBlendCurve::execute()
 {
     BlendPoint bp1 = GetBlendPoint(StartEdge, StartParameter, StartContinuity);
     BlendPoint bp2 = GetBlendPoint(EndEdge, EndParameter, EndContinuity);
diff --git a/src/Mod/Surface/Gui/ViewProviderExtend.cpp b/src/Mod/Surface/Gui/ViewProviderExtend.cpp
index faaaf28891..60b4bc6fec 100644
--- a/src/Mod/Surface/Gui/ViewProviderExtend.cpp
+++ b/src/Mod/Surface/Gui/ViewProviderExtend.cpp
@@ -33,7 +33,7 @@ PROPERTY_SOURCE(SurfaceGui::ViewProviderExtend, PartGui::ViewProviderSpline)
 
 namespace SurfaceGui {
 
-QIcon ViewProviderExtend::getIcon(void) const
+QIcon ViewProviderExtend::getIcon() const
 {
     return Gui::BitmapFactory().pixmap("Surface_ExtendFace");
 }