The warning from is_abstract.hpp may be because iostreams includes <boost/type_traits/is_convertible.hpp>. It's not your problem, but could be simply fixed by changing line 81 of is_abstract.hpp from this: BOOST_STATIC_ASSERT(sizeof(T)); to this: BOOST_STATIC_ASSERT(sizeof(T) != 0); - KM "Jonathan Turkanis" <technews@kangaroologic.com> wrote in message news:d5ilei$2t2$1@sea.gmane.org...
format F:\CVS\boost\boost/type_traits/is_abstract.hpp(81) : warning C4800: 'unsigned int' : forcing value to bool 'true' or 'false' (performance warning) F:\CVS\boost\boost/type_traits/is_abstract.hpp(93) : see reference to class template instantiation 'boost::detail::is_abstract_imp2<T>' being compiled
Iostreams doesn't use is_abstract<>; this must be from another library.