[Boost-users] [Proto] Building a mpl::vector from an expression

Hi, I am trying to build a mpl::vector from an expression like (string(),ClassA(),ClassB()) To get a mpl::vector With string, ClassA and ClassB being not enough under control to protoify them with a proto::extends. I naively tried the following grammar struct BuildFlags : proto::or_< proto::when < proto::terminalproto::_, boost::mpl::vectorproto::_child()

,

proto::when < proto::comma, boost::mpl::push_back< BuildFlags(proto::_left),proto::_right>()

{}; Or some typeof variants of it, with no more success and I start wondering if I got on a rocky way leading me to unavoidable doom. Is there a way to do this or I should give up the idea? Thanks, Christophe _________________________________________________________________ Share your memories online with anyone you want. http://www.microsoft.com/middleeast/windows/windowslive/products/photos-shar...