Ticket #4388: map.patch

.hpp

@@ -25 +25 @@
         template< class Map >
         struct select_first
         {
-            typedef BOOST_DEDUCED_TYPENAME Map::value_type pair_t;
+            typedef BOOST_DEDUCED_TYPENAME range_value<Map>::type pair_t;
             typedef const BOOST_DEDUCED_TYPENAME pair_t::first_type& 
                 result_type;  
 
@@ -38 +38 @@
         template< class Map >
         struct select_second_mutable
         {
-            typedef BOOST_DEDUCED_TYPENAME Map::value_type pair_t;
+            typedef BOOST_DEDUCED_TYPENAME range_value<Map>::type pair_t;
             typedef BOOST_DEDUCED_TYPENAME pair_t::second_type& result_type;  
 
             result_type operator()( pair_t& r ) const
@@ -50 +50 @@
         template< class Map >
         struct select_second_const
         {
-            typedef BOOST_DEDUCED_TYPENAME Map::value_type pair_t;
+            typedef BOOST_DEDUCED_TYPENAME range_value<Map>::type pair_t;
             typedef const BOOST_DEDUCED_TYPENAME pair_t::second_type& 
                 result_type;