Improve const-correctness

Applications/FileIO/Legacy/OGSIOVer4.cpp

@@ -735,7 +735,7 @@ void writeAllDataToGLIFileV4(const std::string& fname,
     // writing all points
     os << "#POINTS"
        << "\n";
-    for (auto& geo_name : geo_names)
+    for (auto const& geo_name : geo_names)
     {
         os.precision(std::numeric_limits<double>::digits10);
         GeoLib::PointVec const* const pnt_vec(geo.getPointVecObj(geo_name));

GeoLib/AnalyticalGeometry-impl.h

@@ -17,8 +17,8 @@ std::pair<Eigen::Vector3d, double> getNewellPlane(InputIterator pnts_begin,
     Eigen::Vector3d plane_normal({0, 0, 0});
     Eigen::Vector3d centroid({0, 0, 0});
     for (auto i=std::prev(pnts_end), j=pnts_begin; j!=pnts_end; i = j, ++j) {
-        auto &pt_i = *(*i);
-        auto &pt_j = *(*j);
+        auto const& pt_i = *(*i);
+        auto const& pt_j = *(*j);
         plane_normal[0] += (pt_i[1] - pt_j[1])
                            * (pt_i[2] + pt_j[2]); // projection on yz
         plane_normal[1] += (pt_i[2] - pt_j[2])

NumLib/DOF/SimpleMatrixVectorProvider.cpp

@@ -151,12 +151,12 @@ SimpleMatrixVectorProvider::~SimpleMatrixVectorProvider()
             _used_vectors.size());
     }
 
-    for (auto& ptr_id : _used_matrices)
+    for (auto const& ptr_id : _used_matrices)
     {
         delete ptr_id.first;
     }
 
-    for (auto& ptr_id : _used_vectors)
+    for (auto const& ptr_id : _used_vectors)
     {
         delete ptr_id.first;
     }