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

2 Oct 2008


      Eric Niebler a écrit :
...
You can use proto::if_ with some mpl meta-functions and 
proto::arity_of. See below:
Ah, I missed that v_v Times to print out the new docs and pin it on my 
office walls
...
struct ArityLessThan3
  : proto::or_<
        proto::terminal<_>
      , proto::and_<
            proto::function< proto::vararg<ArityLessThan3> >
          , proto::if_< mpl::less< proto::arity_of<_>, mpl::long_<4>
...
() >
        >
    >
{};
Shouldn't it be : proto::function< _, proto::vararg<ArityLessThan3> >  ?
or does vararg also count the function tag ?
-- 
___________________________________________
Joel Falcou - Assistant Professor
PARALL Team - LRI - Universite Paris Sud XI
Tel : (+33)1 69 15 66 35