Re: [Boost-users] [preprocessor] one comma too many

Subject: Re: [Boost-users] [preprocessor] one comma too many
From: Daniel Bradburn (moagstar_at_[hidden])
Date: 2010-05-26 07:23:03

You can also use BOOST_PP_COMMA() to defer the comma...

BOOST_PP_ENUM_PARAMS(n, std::pair<T BOOST_PP_COMMA() T> r)

> Date: Wed, 26 May 2010 13:24:45 +0200
> From: maxime_at_[hidden]
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] [preprocessor] one comma too many
> 
> On 05/26/2010 01:08 PM, Manfred Doudar wrote:
> > However, I would like to replace "T" with the following instead:
> > 
> >   std::pair<T, T>
> > 
> > ie:  I want to write something to the effect of:
> > 
> >   BOOST_PP_ENUM_PARAMS(n, std::pair<T, T> r)
> > 
> > Of course, BOOST_PP_ENUM_PARAMS now sees one too many arguments, and
> > errors.  Any ideas on how to achieve this would be most appreciated.
> > 
> > 
> > With thanks in advance,
> 
> Hi,
> 
> You must use a typedef to hide that comma :
> 
> typedef std::pair<T, T> pairTT_t;
> BOOST_PP_ENUM_PARAM(n, pairTT_t r)
> 
> -- 
> Maxime
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
                                               
_________________________________________________________________
De Nieuwste Internet Explorer speciaal voor Hotmail, download nu gratis
http://www.microsoft.com/netherlands/ie8/hotmail.htm