Eric Niebler wrote:

#include #include #include #include #include #include namespace proto = boost::proto; namespace mpl = boost::mpl; using proto::_;

namespace My { struct my_tag {};

template struct attribute_ { BOOST_PROTO_BASIC_EXTENDS( proto::terminal::type , attribute_ , proto::default_domain ) };

attribute_<> const attribute = {{}};

struct BuildAttributes : proto::make< mpl::pop_front< proto::fold_tree< _ , mpl::vector0<>() , mpl::push_back()

...

{}; }

int main() { mpl::vector3 x = My::BuildAttributes()( My::attribute << int() << std::string() << bool() ); }

HTH,

Hi Eric, It does! It is way more elegant than what I came up with. I can even add a few features (like an optional end) inside and it still compiles much faster. Thanks a lot, Christophe _________________________________________________________________ With Windows Live, you can organize, edit, and share your photos. http://www.microsoft.com/middleeast/windows/windowslive/products/photo-galle...