fix comparators of grids

alib2graph_data/src/grid/square/SquareGrid4.hpp

@@ -109,8 +109,8 @@ int SquareGrid4<TCoordinate, TEdge>::compare(const GridBase &other) const {
 template<typename TCoordinate, typename TEdge>
 int SquareGrid4<TCoordinate, TEdge>::compare(const SquareGrid4 &other) const {
   auto first = ext::tie(this->m_obstacles, this->m_height, this->m_width);
-  TCoordinate height = other.getHeight();
-  TCoordinate width = other.getWidth();
+  const TCoordinate height = other.getHeight();
+  const TCoordinate width = other.getWidth();
   auto second = ext::tie(other.getObstacleList(), height, width);
   static ext::compare<decltype(first)> comp;

alib2graph_data/src/grid/square/SquareGrid8.hpp

@@ -101,8 +101,8 @@ int SquareGrid8<TCoordinate, TEdge>::compare(const GridBase &other) const {
 template<typename TCoordinate, typename TEdge>
 int SquareGrid8<TCoordinate, TEdge>::compare(const SquareGrid8 &other) const {
   auto first = ext::tie(this->m_obstacles, this->m_height, this->m_width);
-  TCoordinate height = other.getHeight();
-  TCoordinate width = other.getWidth();
+  const TCoordinate height = other.getHeight();
+  const TCoordinate width = other.getWidth();
   auto second = ext::tie(other.getObstacleList(), height, width);
   static ext::compare<decltype(first)> comp;

alib2graph_data/src/grid/square/WeightedSquareGrid4.hpp

@@ -133,8 +133,8 @@ int WeightedSquareGrid4<TCoordinate, TEdge>::compare(const GridBase &other) cons
 template<typename TCoordinate, typename TEdge>
 int WeightedSquareGrid4<TCoordinate, TEdge>::compare(const WeightedSquareGrid4 &other) const {
   auto first = ext::tie(this->m_obstacles, this->m_height, this->m_width);
-  TCoordinate height = other.getHeight();
-  TCoordinate width = other.getWidth();
+  const TCoordinate height = other.getHeight();
+  const TCoordinate width = other.getWidth();
   auto second = ext::tie(other.getObstacleList(), height, width);
   static ext::compare<decltype(first)> comp;

alib2graph_data/src/grid/square/WeightedSquareGrid8.hpp

@@ -133,8 +133,8 @@ int WeightedSquareGrid8<TCoordinate, TEdge>::compare(const GridBase &other) cons
 template<typename TCoordinate, typename TEdge>
 int WeightedSquareGrid8<TCoordinate, TEdge>::compare(const WeightedSquareGrid8 &other) const {
   auto first = ext::tie(this->m_obstacles, this->m_height, this->m_width);
-  TCoordinate height = other.getHeight();
-  TCoordinate width = other.getWidth();
+  const TCoordinate height = other.getHeight();
+  const TCoordinate width = other.getWidth();
   auto second = ext::tie(other.getObstacleList(), height, width);
   static ext::compare<decltype(first)> comp;