Mesh: modernize C++: return braced init list

src/Mod/Mesh/App/Core/Elements.h

@@ -965,7 +965,7 @@ inline void MeshFacet::GetEdge (unsigned short usSide, MeshHelpEdge &rclEdge) co
 
 inline std::pair<PointIndex, PointIndex> MeshFacet::GetEdge (unsigned short usSide) const
 {
-    return std::pair<PointIndex, PointIndex>(_aulPoints[usSide], _aulPoints[(usSide+1)%3]);
+    return {_aulPoints[usSide], _aulPoints[(usSide+1)%3]};
 }
 
 inline void MeshFacet::Transpose (PointIndex ulOrig, PointIndex ulNew)

src/Mod/Mesh/App/Core/Evaluation.cpp

@@ -186,7 +186,7 @@ std::vector<FacetIndex> MeshEvalOrientation::GetIndices() const
     FacetIndex ulStartFacet, ulVisited;
 
     if (_rclMesh.CountFacets() == 0)
-        return std::vector<FacetIndex>();
+        return {};
 
     // reset VISIT flags
     MeshAlgorithm cAlg(_rclMesh);

src/Mod/Mesh/App/Core/Segmentation.cpp

@@ -58,7 +58,7 @@ MeshSegment MeshSurfaceSegment::FindSegment(FacetIndex index) const
             return segment;
     }
 
-    return MeshSegment();
+    return {};
 }
 
 // --------------------------------------------------------

src/Mod/Mesh/App/EdgePyImp.cpp

@@ -135,7 +135,7 @@ PyObject* EdgePy::unbound(PyObject *args)
 
 Py::Boolean EdgePy::getBound() const
 {
-    return Py::Boolean(getEdgePtr()->isBound());
+    return {getEdgePtr()->isBound()};
 }
 
 Py::List EdgePy::getPoints() const

src/Mod/Mesh/App/FacetPyImp.cpp

@@ -136,7 +136,7 @@ Py::Long FacetPy::getIndex() const
 
 Py::Boolean FacetPy::getBound() const
 {
-    return Py::Boolean(getFacetPtr()->isBound());
+    return {getFacetPtr()->isBound()};
 }
 
 Py::Object FacetPy::getNormal() const

src/Mod/Mesh/App/Mesh.h

@@ -397,14 +397,14 @@ public:
     /** @name Iterator */
     //@{
     const_point_iterator points_begin() const
-    { return const_point_iterator(this, 0); }
+    { return {this, 0}; }
     const_point_iterator points_end() const
-    { return const_point_iterator(this, countPoints()); }
+    { return {this, countPoints()}; }
 
     const_facet_iterator facets_begin() const
-    { return const_facet_iterator(this, 0); }
+    { return {this, 0}; }
     const_facet_iterator facets_end() const
-    { return const_facet_iterator(this, countFacets()); }
+    { return {this, countFacets()}; }
 
     using const_segment_iterator = std::vector<Segment>::const_iterator;
     const_segment_iterator segments_begin() const

src/Mod/Mesh/App/MeshPointPyImp.cpp

@@ -93,7 +93,7 @@ Py::Long MeshPointPy::getIndex() const
 
 Py::Boolean MeshPointPy::getBound() const
 {
-    return Py::Boolean(getMeshPointPtr()->Index != UINT_MAX);
+    return {getMeshPointPtr()->Index != UINT_MAX};
 }
 
 Py::Object MeshPointPy::getNormal() const

src/Mod/Mesh/App/Segment.h

@@ -95,9 +95,9 @@ public:
     };
 
     const_facet_iterator facets_begin() const
-    { return const_facet_iterator(this, _indices.begin()); }
+    { return {this, _indices.begin()}; }
     const_facet_iterator facets_end() const
-    { return const_facet_iterator(this, _indices.end()); }
+    { return {this, _indices.end()}; }
 };
 
 } // namespace Mesh

src/Mod/Mesh/Gui/DlgEvaluateMeshImp.cpp

@@ -1362,7 +1362,7 @@ void DockEvaluateMeshImp::closeEvent(QCloseEvent*)
  */
 QSize DockEvaluateMeshImp::sizeHint () const
 {
-    return QSize(371, 579);
+    return {371, 579};
 }
 
 #include "moc_DlgEvaluateMeshImp.cpp"

src/Mod/Mesh/Gui/PropertyEditorMesh.cpp

@@ -73,7 +73,7 @@ QVariant PropertyMeshKernelItem::value(const App::Property*) const
     }
 
     QString  str = QObject::tr("[Points: %1, Edges: %2, Faces: %3]").arg(ctP).arg(ctE).arg(ctF);
-    return QVariant(str);
+    return {str};
 }
 
 QVariant PropertyMeshKernelItem::toolTip(const App::Property* prop) const
@@ -103,7 +103,7 @@ void PropertyMeshKernelItem::setEditorData(QWidget *editor, const QVariant& data
 QVariant PropertyMeshKernelItem::editorData(QWidget *editor) const
 {
     Q_UNUSED(editor);
-    return QVariant();
+    return {};
 }
 
 int PropertyMeshKernelItem::countPoints() const

src/Mod/Mesh/Gui/SoFCMeshObject.cpp

@@ -581,7 +581,7 @@ inline void glNormal(float* n)
 // Helper function: convert Vec to SbVec3f
 inline SbVec3f sbvec3f(const Base::Vector3f& _v)
 {
-    return SbVec3f(_v.x, _v.y, _v.z);
+    return {_v.x, _v.y, _v.z};
 }
 
 SO_NODE_SOURCE(SoFCMeshObjectShape)

src/Mod/MeshPart/Gui/CrossSections.cpp

@@ -96,7 +96,7 @@ public:
     }
     std::vector<std::string> getDisplayModes() const override
     {
-        return std::vector<std::string>();
+        return {};
     }
     void setCoords(const std::vector<Base::Vector3f>& v)
     {