Maurizio Vitale wrote:
What about introducing a macro:
#define BOOST_PROTO_WRAP(DOMAIN,EXPRESSION) \ namespace boost { namespace proto { \ template<typename E> \ struct generate<DOMAIN, E> { \ typedef EXPRESSION<E> type; \ static type make (E const& expr) { \ return type (expr); \ } \ }; \ } }
as far as I can tell one does never need something different from the above boilerplate code. (otherwise I'd like to see examples, for my own education)
Not a big deal, I know, but looks nicer (and sound nicer in the docs as well, I think).
I agree, this part of proto isn't as nice as it could be. I've considered making the expression generator a template parameter to the proto::domain, something like: struct my_domain : proto::domain< struct my_grammar, struct my_generator > {}; This way, you wouldn't have to open proto's namespace to specialize proto::generate. I haven't thought too hard about it, though. I do know that I would like to avoid macros in proto's interface as much as possible.
Have fun in Colorado!
Workin' on it! :-) -- Eric Niebler Boost Consulting www.boost-consulting.com