Re: [Boost-users] [Fusion] value_at_c and its relatives not applicable to Associative Sequence?

Subject: Re: [Boost-users] [Fusion] value_at_c and its relatives not applicable to Associative Sequence?
From: Joel de Guzman (joel_at_[hidden])
Date: 2011-03-20 20:20:04

On 3/20/2011 10:39 PM, TONGARI wrote:
> Hi,
>
> the document says that 'value_at_c' accepts a Forward Sequence, and
> set/map, which is of Associative Sequence as well as Forward Sequence, why the following
> does not work?
>
> #include <boost/fusion/include/value_at.hpp>
> #include <boost/fusion/include/set.hpp>
>
> int main()
> {
>       namespace fs = boost::fusion;
>       typedef fs::result_of::value_at_c<fs::set<int>, 0> >::type type;
>       return 0;
> }

ForwardSequence does not have value_at_c, only RandomAccessSequence
have that.

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://boost-spirit.com