[boost] Learning boost::MPL

1 Jul 2004

      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