+BOOST_TT_AUX_BOOL_TRAIT_SPEC1(has_nothrow_assign,void,false)
+#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
+BOOST_TT_AUX_BOOL_TRAIT_SPEC1(has_nothrow_assign,void const,false)
+BOOST_TT_AUX_BOOL_TRAIT_SPEC1(has_nothrow_assign,void const volatile,false)
+BOOST_TT_AUX_BOOL_TRAIT_SPEC1(has_nothrow_assign,void volatile,false)
+#endif