1 files changed, 1 insertions, 0 deletions

diff --git a/include/konforka/pointer_map.h b/include/konforka/pointer_map.h
index d706e71..00dd486 100644
--- a/include/konforka/pointer_map.h
+++ b/include/konforka/pointer_map.h
@@ -1,63 +1,64 @@
 #ifndef __KONFORKA_POINTER_MAP_H
 #define __KONFORKA_POINTER_MAP_H
 
 #include <typeinfo>
 
 /**
  * @file
  * @brief mapping of pointers.
  *
  * The support for global mapping of pointers. Useful when using third-party
  * libraries callbacks when the library does not provide mechanism for passing
  * along custom context-dependent data.
  */
 
 namespace konforka {
+    using std::type_info;
 
     /**
      * @brief internally used actual implementation of mapping pointer.
      *
      * @param tf the typeid of the key pointer.
      * @param pf the key pointer.
      * @param tt the typeid of the value pointer.
      * @param pt the value pointer.
      */
     void _map_pointer(const type_info& tf,void *pf,const type_info& tt,void *pt);
     /**
      * @brief internally used actual implementation of destroying mapped
      * pointer.
      *
      * @param tf the typeid of the key pointer.
      * @param pf the key pointer.
      * @param tt the typeid of the value pointer.
      * @param pt the value pointer.
      */
     void _unmap_pointer(const type_info& tf,void *pf,const type_info& tt,void *pt);
     /**
      * @brief internally used actual implementation of retrieving mapped
      * pointer.
      *
      * @param tf the typeid of the key pointer.
      * @param pf the key pointer.
      * @param tt the typeid of the value pointer.
      * @return the value.
      */
     void *_mapped_pointer(const type_info& tf,void *pf,const type_info& tt);
 
     /**
      * @brief the object, maintaining mapped pointer.
      * 
      * @param from_t the key type.
      * @param to_t the value type.
      */
     template<typename from_t,typename to_t>
         class map_pointer {
             public:
                 /**
                  * stored key.
                  */
                 from_t _from;
                 /**
                  * stored value.
                  */
                 to_t _to;