[Boost-users] [Proto] Limiting function arity in grammar

Subject: [Boost-users] [Proto] Limiting function arity in grammar
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2008-10-02 15:59:37

How can I write a grammar that accept a given set of terminal and 
functions with up to N arguments
(for example accepting function with 1 to 5 arguments but not 6 or more) ?

I believe i can count the elements of vararg using mpl::size ons ome 
proto::arg_ or proto::value maybe
but how to prevent those who violates this condition be removed from the 
accepted functions et ?

thanks in advance

-- 
___________________________________________
Joel Falcou - Assistant Professor
PARALL Team - LRI - Universite Paris Sud XI
Tel : [phone]