Proto for Boost mailing list page: [proto] Refining the Proto concepts

Subject: [proto] Refining the Proto concepts
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2012-07-18 05:59:14

In an experiment to reduce compile times, I'd like to try reducing the 
number of template instantiations tied to the use of Proto.

To do this, one could start by defining his own expression types instead 
of wrappers of proto::expr, which is something that is more-or-less 
promoted by proto-11.

However, the proto_base_expr and proto_grammar typedefs still force 
those instantiations.

Would it be possible to refine the concepts so as to avoid this?