1 files changed, 5 insertions, 6 deletions
diff --git a/src/common/include/gudhi/distance_functions.h b/src/common/include/gudhi/distance_functions.h
index 7f33a804..f6e2ab5a 100644
--- a/src/common/include/gudhi/distance_functions.h
+++ b/src/common/include/gudhi/distance_functions.h
@@ -27,6 +27,8 @@
 #include <type_traits>  // for std::decay
 #include <iterator>  // for std::begin, std::end
 
+namespace Gudhi {
+
 /** @file
  * @brief Global distance functions
  */
@@ -35,7 +37,7 @@
  * have the same dimension. */
 class Euclidean_distance {
  public:
-  template< typename Point >  
+  template< typename Point >
   auto operator()(const Point& p1, const Point& p2) const -> typename std::decay<decltype(*std::begin(p1))>::type {
     auto it1 = p1.begin();
     auto it2 = p2.begin();
@@ -46,11 +48,8 @@ class Euclidean_distance {
     }
     return std::sqrt(dist);
   }
-  template< typename T >  
-  T operator() ( const std::pair< T,T >& f , const std::pair< T,T >& s )
-  {
-	return  sqrt( (f.first-s.first)*(f.first-s.first) + (f.second-s.second)*(f.second-s.second) );
-  }
 };
 
+}  // namespace Gudhi
+
 #endif  // DISTANCE_FUNCTIONS_H_