Subject: Re: [Boost-users] [preprocessor]
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-12-13 18:05:24
AMDG
Christian Henning wrote:
> Hi there, thanks Steven for your good advise. I have been making some
> progress but I'm stuck on one part. Here is some code that exhibits my
> problem.
>
> #include <boost/preprocessor.hpp>
>
> template< int i, int j > void test() {}
>
> int main()
> {
> #define S1 (1)(2)(3)
> #define S2 (1)(2)(3)
> #define FOR_EACH( r, data, elem ) BOOST_PP_CAT( elem \
> , BOOST_PP_COMMA() )
>
> #define FOR_EACH_PRODUCT(r, product) test< BOOST_PP_SEQ_FOR_EACH(
> FOR_EACH \
> ,
> BOOST_PP_EMPTY() \
> , product \
> ) >();
>
> BOOST_PP_SEQ_FOR_EACH_PRODUCT( FOR_EACH_PRODUCT \
> , (S1)(S2) \
> )
>
> return 0;
> }
>
> Here is what the preprocessor produces:
>
> test< 1, 1, >();
> test< 1, 2, >();
> test< 1, 3, >();
> test< 2, 1, >();
> [snip]
>
>
>
> My problem is that I cannot figure out how to get rid of the last
> comma? Any ideas?
>
BOOST_PP_SEQ_ENUM?
In Christ,
Steven Watanabe