@@ -99,6 +99,7 @@ template<typename _Alloc>
typedef typename _Base_type::pointer pointer;
typedef typename _Base_type::const_pointer const_pointer;
typedef typename _Base_type::size_type size_type;
+ typedef typename _Base_type::difference_type difference_type;
// C++0x allocators do not define reference or const_reference
typedef value_type& reference;
typedef const value_type& const_reference;
@@ -170,6 +171,7 @@ template<typename _Alloc>
typedef typename _Alloc::reference reference;
typedef typename _Alloc::const_reference const_reference;
typedef typename _Alloc::size_type size_type;
+ typedef typename _Alloc::difference_type difference_type;
static pointer
allocate(_Alloc& __a, size_type __n)