Few C++-17 magic

src/mesh/Connectivity3D.hpp

@@ -309,9 +309,7 @@ private:
       for (const auto& face_cells_vector : face_cells_map) {
         const auto& cells_vector = face_cells_vector.second;
         for (unsigned short lj=0; lj<cells_vector.size(); ++lj) {
-          unsigned int cell_number;
-          unsigned short cell_local_face;
-          std::tie(cell_number, cell_local_face, std::ignore) = cells_vector[lj];
+          const auto& [cell_number, cell_local_face, reversed] = cells_vector[lj];
           cell_faces(cell_number,cell_local_face) = l;
         }
         ++l;
@@ -325,10 +323,7 @@ private:
       for (const auto& face_cells_vector : face_cells_map) {
         const auto& cells_vector = face_cells_vector.second;
         for (unsigned short lj=0; lj<cells_vector.size(); ++lj) {
-          unsigned int cell_number;
-          unsigned short cell_local_face;
-          bool reversed;
-          std::tie(cell_number, cell_local_face, reversed) = cells_vector[lj];
+          const auto& [cell_number, cell_local_face, reversed] = cells_vector[lj];
           cell_faces_is_reversed(cell_number,cell_local_face) = reversed;
         }
         ++l;