ptr_traits.h (pointer_traits::rebind): Make public.

	* include/bits/ptr_traits.h (pointer_traits::rebind): Make public.
	* testsuite/20_util/pointer_traits/requirements/typedefs.cc: Check
	rebind works.

From-SVN: r186670

libstdc++-v3/ChangeLog

 2012-04-22  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
+	* include/bits/ptr_traits.h (pointer_traits::rebind): Make public.
+	* testsuite/20_util/pointer_traits/requirements/typedefs.cc: Check
+	rebind works.
+
+2012-04-22  Jonathan Wakely  <jwakely.gcc@gmail.com>
+
 	* include/debug/forward_list (forward_list::splice_after): Check
 	allocators are equal.
 	* src/c++11/debug.cc: Fix spelling.

libstdc++-v3/include/bits/ptr_traits.h

@@ -140,14 +140,8 @@ _GLIBCXX_HAS_NESTED_TYPE(difference_type)
       /// Type used to represent the difference between two pointers
       typedef typename __ptrtr_diff_type<_Ptr>::__type  difference_type;
 
-    private:
       template<typename _Up>
         using rebind = typename __ptrtr_rebind<_Ptr, _Up>::__type;
-
-      // allocator_traits needs to use __rebind
-      template<typename> friend struct allocator_traits;
-      template<typename> friend struct pointer_traits;
-      template<typename, typename> friend class __ptrtr_rebind_helper2;
     };
 
   /**

libstdc++-v3/testsuite/20_util/pointer_traits/requirements/typedefs.cc

@@ -32,6 +32,7 @@ void test01()
   typedef typename test_type::pointer           pointer;
   typedef typename test_type::element_type      element_type;
   typedef typename test_type::difference_type   difference_type;
+  typedef typename test_type::template rebind<char> rebind_type;
 }
 
 int main()