Need to use __is_polymorphic intrinsic with msvc

when final is supported.
Also improve tests.

test/is_polymorphic_test.cpp

@@ -82,6 +82,11 @@ BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_polymorphic<IDispatch>::value, true);
 // this test was added to check for bug reported on 21 May 2003:
 BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_polymorphic<poly_bug>::value, true);
 
+#ifndef BOOST_NO_CXX11_FINAL
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_polymorphic < final_UDT >::value, false);
+BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_polymorphic<polymorphic_derived_final>::value, true);
+#endif
+
 TT_TEST_END
 
 

test/test.hpp

@@ -265,11 +265,6 @@ struct nothrow_construct_UDT
    { return true; }
 };
 
-#ifndef BOOST_NO_CXX11_FINAL
-struct final_UDT final
-{};
-#endif
-
 class Base { };
 
 class Derived : public Base { };
@@ -370,6 +365,14 @@ struct polymorphic_derived2 : public polymorphic_base
    virtual void method();
 };
 
+#ifndef BOOST_NO_CXX11_FINAL
+struct final_UDT final
+{};
+struct polymorphic_derived_final final : public polymorphic_derived2
+{};
+#endif
+
+
 struct virtual_inherit1 : public virtual Base { };
 struct virtual_inherit2 : public virtual_inherit1 { };
 struct virtual_inherit3 : private virtual Base {};