-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Steven Watanabe Sent: Tuesday, August 07, 2012 11:29 PM To: boost@lists.boost.org Subject: Re: [boost] [type_erasure] Review started (July 18-27, 2012)
AMDG
This is an explicit specialization which uses a class called Os. I think you intended a partial specialization:
template<class Os> struct ostreamable<Os, std::pair<const int, double> >;
I've placed this just before my int main(){...} namespace boost { namespace type_erasure { // Partial specialization of struct ostreamable: template<class Os> struct ostreamable<Os, std::pair<const int, double> >; } // namespace type_erasure } // namespace boost looks more promising but still fails inside the magic of type_erasure. type_erasure_print_map.cpp I:\boost-sandbox\type_erasure\boost/type_erasure/detail/get_signature.hpp(23): error C2027: use of undefined type 'boost::type_erasure::ostreamable<Os,T>' with [ Os=std::basic_ostream<char,std::char_traits<char>>, T=std::pair<const int,double> ] I:\boost-sandbox\type_erasure\boost/type_erasure/detail/get_signature.hpp(25) : see reference to class template instantiation 'boost::type_erasure::detail::get_signature<Concept>::nested' being compiled with [ Concept=boost::type_erasure::ostreamable<std::basic_ostream<char,std::char_traits<char>>,std::pair<c onst int,double>> ] I:\boost-sandbox\type_erasure\boost/type_erasure/detail/adapt_to_vtable.hpp(235) : see reference to class template instantiation 'boost::type_erasure::detail::get_signature<Concept>' being compiled with [ Concept=boost::type_erasure::ostreamable<std::basic_ostream<char,std::char_traits<char>>,std::pair<c onst int,double>> ] ... Full message in all its glory attached ;-) Suggestions? Thanks Paul --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow@hetp.u-net.com