Index: D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/overload_resolution.hpp
===================================================================
--- D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/overload_resolution.hpp	(.../https://svn.boost.org/svn/boost/trunk/boost/mpl)	(revisione 39531)
+++ D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/overload_resolution.hpp	(.../D:/boost/svn/branches/bcbboost/boost/boost/mpl)	(copia locale)
@@ -18,7 +18,7 @@
 
 #if    !defined(BOOST_MPL_CFG_BROKEN_OVERLOAD_RESOLUTION) \
     && !defined(BOOST_MPL_PREPROCESSING_MODE) \
-    && (   BOOST_WORKAROUND(__BORLANDC__, < 0x600) \
+    && (   BOOST_WORKAROUND(__BORLANDC__, < 0x590) \
         || BOOST_WORKAROUND(__MWERKS__, < 0x3001) \
         )
 
Index: D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/ttp.hpp
===================================================================
--- D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/ttp.hpp	(.../https://svn.boost.org/svn/boost/trunk/boost/mpl)	(revisione 39531)
+++ D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/ttp.hpp	(.../D:/boost/svn/branches/bcbboost/boost/boost/mpl)	(copia locale)
@@ -19,7 +19,9 @@
 #include <boost/mpl/aux_/config/workaround.hpp>
 
 #if !defined(BOOST_MPL_CFG_NO_TEMPLATE_TEMPLATE_PARAMETERS) \
-    && defined(BOOST_NO_TEMPLATE_TEMPLATES)
+    && ( defined(BOOST_NO_TEMPLATE_TEMPLATES) \
+      || BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x590) ) \
+       )
 
 #   define BOOST_MPL_CFG_NO_TEMPLATE_TEMPLATE_PARAMETERS
 
Index: D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/ctps.hpp
===================================================================
--- D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/ctps.hpp	(.../https://svn.boost.org/svn/boost/trunk/boost/mpl)	(revisione 39531)
+++ D:/boost/svn/branches/bcbboost/boost/boost/mpl/aux_/config/ctps.hpp	(.../D:/boost/svn/branches/bcbboost/boost/boost/mpl)	(copia locale)
@@ -19,7 +19,7 @@
 
 #if    !defined(BOOST_MPL_CFG_NO_NONTYPE_TEMPLATE_PARTIAL_SPEC) \
     && !defined(BOOST_MPL_PREPROCESSING_MODE) \
-    && BOOST_WORKAROUND(__BORLANDC__, < 0x600) 
+    && BOOST_WORKAROUND(__BORLANDC__, < 0x582)
 
 #   define BOOST_MPL_CFG_NO_NONTYPE_TEMPLATE_PARTIAL_SPEC
 
Index: D:/boost/svn/branches/bcbboost/boost/boost/mpl/has_xxx.hpp
===================================================================
--- D:/boost/svn/branches/bcbboost/boost/boost/mpl/has_xxx.hpp	(.../https://svn.boost.org/svn/boost/trunk/boost/mpl)	(revisione 39531)
+++ D:/boost/svn/branches/bcbboost/boost/boost/mpl/has_xxx.hpp	(.../D:/boost/svn/branches/bcbboost/boost/boost/mpl)	(copia locale)
@@ -26,6 +26,10 @@
 
 #include <boost/preprocessor/cat.hpp>
 
+#if BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0x590) )
+# include <boost/type_traits/is_class.hpp>
+#endif
+
 #if !defined(BOOST_MPL_CFG_NO_HAS_XXX)
 
 #   if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
@@ -182,6 +186,41 @@
 }; \
 /**/
 
+#   elif BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0x590) )
+
+#   define BOOST_MPL_HAS_XXX_TRAIT_NAMED_BCB_DEF(trait, trait_tester, name, default_) \
+template< typename T, bool IS_CLASS > \
+struct trait_tester \
+{ \
+    BOOST_STATIC_CONSTANT( bool,  value = false ); \
+}; \
+template< typename T > \
+struct trait_tester< T, true > \
+{ \
+    struct trait_tester_impl \
+    { \
+        template < class U > \
+        static int  resolve( boost::mpl::aux::type_wrapper<U> const volatile * \
+                           , boost::mpl::aux::type_wrapper<typename U::name >* = 0 ); \
+        static char resolve( ... ); \
+    }; \
+    typedef boost::mpl::aux::type_wrapper<T> t_; \
+    BOOST_STATIC_CONSTANT( bool, value = ( sizeof( trait_tester_impl::resolve( static_cast< t_ * >(0) ) ) == sizeof(int) ) ); \
+}; \
+template< typename T, typename fallback_ = boost::mpl::bool_<default_> > \
+struct trait           \
+{                      \
+    BOOST_STATIC_CONSTANT( bool, value = (trait_tester< T, boost::is_class< T >::value >::value) );     \
+    typedef boost::mpl::bool_< trait< T, fallback_ >::value > type; \
+};
+
+#   define BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(trait, name, default_) \
+    BOOST_MPL_HAS_XXX_TRAIT_NAMED_BCB_DEF( trait \
+                                         , BOOST_PP_CAT(trait,_tester)      \
+                                         , name       \
+                                         , default_ ) \
+/**/
+
 #   else // other SFINAE-capable compilers
 
 #   define BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(trait, name, default_) \