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@altribe.org
> To: boost-users@lists.boost.org
> 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
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> Boost-users mailing list
> Boost-users@lists.boost.org
> http://lists.boost.org/mailman/listinfo.cgi/boost-users

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