[boost] Learning boost::MPL

From: Dan (dan_at_[hidden])
Date: 2004-06-30 23:15:08

I'm trying to use iter_fold with a vector_c to compute the sum of all of the
integers in the container.

What I have is:

template<typename Sequence>
struct sum
{
        typedef typename mpl::iter_fold<
                Sequence,
                typename mpl::begin<Sequence>::type,
                mpl::plus< mpl::deref<_1>, mpl::deref<_2> >; 
                // ^ what should this really be?
	> // what do i put after here?
};

Which obviously won't work. I don't know how to keep a running total as I
iterate over the sequence with plus.

Help!

Thanks,
-Dan