On 6/15/2010 8:49 AM, joel falcou wrote:
I have an expression wrapper class tied to a domain and a grammar. Everythign works ok except for the fact it seems I can't compute type inside the expression class that depends on the expression type itself. I end up with tons of incomplete type error in proto/fusion.hpp.
The example is a bit big, i'm still working on a small repro but basically, what I do is using the expression framework from ym last mail is to have a value_type on expression which represent the value_type of the expression element.
template<class Expr> struct wrap : proto::extends<Expr, wrap<Expr> > { // Expr is complete here // wrap is not typedef typename some_fun<wrap>::type value_type; // NO typedef typename some_fun<Expr>::type value_type; // YES }; Does that help? -- Eric Niebler BoostPro Computing http://www.boostpro.com