Re: [Boost-users] [Proto] Using custom function tag in the simplified calalble context

Subject: Re: [Boost-users] [Proto] Using custom function tag in the simplified calalble context
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2008-10-04 11:48:49

Eric Niebler a écrit :
> That's not right. Your conj() function is returning a unary expression 
> with a conj_tag tag type. Your grammar is trying to match a binary 
> expression with a proto::tag::function tag type. Your grammar should be:
>
>   proto::unary_expr<conj_tag, my_grammar>
>
Ah, this explains another oddities then. Ok, I think i got side-tracked 
by some other example I read in the old doc.

>
> In your context, you should have an overloaded operator() like this:
>
>   template<typename Expr>
>   some-return-type operator()(conj_tag, Expr const &expr) const { ... }
perfect.

Thanks again for spending time answering my silly questions ;)

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