[boost] [fusion] mpl::clear doesn't work on fusion views

Today I ran into a limitation in Fusion/MPL interoperability. I couldn't use an mpl algorithm on a Fusion sequence because mpl::clear wasn't defined on it. The sequence was a joint_view. I see that fusion::detail::clear is only defined for Fusion cons, map, set, vector and deque. Can we get it defined for all Fusion sequences? I think for everything else, an empty Fusion vector would do. That is all fusion::clear does, btw. (Aside: it seems strange to me that mpl::clear of a fusion::set gives an empty set, but that fusion::clear of an empty set gives an empty vector. This should probably be made consistent.) -- Eric Niebler BoostPro Computing http://www.boostpro.com