Aleksey Gurtovoy wrote:

Robert Ramey writes:

...

The serialization library is failing all tests with IBM visual age compiler. Errors occur within mpl.

Not quite, I am afraid. Considering that the 'apply_if' test itself compiles without an error, this looks more like a problem with the particular context where the facility is used:

"/home/tk/boost_regression/boost/boost/serialization/level.hpp", line 44.9: 1540-0038 (S) The name "typename mpl::apply_if< boost::is_base_and_derived< boost::serialization::basic_traits, boost::serialization::nvp<A[9]> >, boost::serialization::implementation_level< boost::serialization::nvp<A[9]> >::traits_class_level< boost::serialization::nvp<A[9]> >, boost::mpl::int_<3> >::type" is not a type.

Looking at the code in "level.hpp", this is one complicated typedef!

typedef BOOST_DEDUCED_TYPENAME mpl::apply_if< is_base_and_derived<basic_traits, T>, traits_class_level<T>, //else BOOST_DEDUCED_TYPENAME mpl::apply_if< is_fundamental<T>, mpl::int_<primitive_type>, //else BOOST_DEDUCED_TYPENAME mpl::apply_if< is_class<T>, mpl::int_<object_class_info>, //else BOOST_DEDUCED_TYPENAME mpl::apply_if< is_array<T>, #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) mpl::int_<not_serializable>, #else mpl::int_<object_serializable>, #endif //else BOOST_DEDUCED_TYPENAME mpl::apply_if< is_enum<T>, #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) mpl::int_<not_serializable>, #else mpl::int_<object_serializable>, #endif //else mpl::int_<not_serializable> >::type >::type >::type >::type >::type type;

It's inefficient, too (you don't need all these '::type's except the very last one), but in any case: I think the most practical way to approach the error is to simplify the above to the bare minimum (ignoring the semantics for now), and see how the compiler reacts. For instance,

#if BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) typedef BOOST_DEDUCED_TYPENAME mpl::apply_if< is_base_and_derived<basic_traits, T>, traits_class_level<T>, mpl::int_<object_serializable> >::type type; #else // original code ...

#endif

I tried Aleksey's suggestion above and it seems to improve the situation for the serialization lib on vacpp. I suggest to apply the suggested modif. Sorry for the late response but I was on vacation. Toon