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

Subject: Re: [Boost-users] [Proto] Limiting function arity in grammar
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2008-10-02 16:36:46

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 : [phone]