[Boost-users] mpl::fold problems

Hello everybody! I'm a newbie in boost and I've got some problems with boost::mpl #include #include #include template struct tr_field2 { static const unsigned count = space; } typedef boost::mpl::vector4< tr_field2, tr_field2, tr_field2, tr_field2

Test_description;

I want to calculate a sum of all tr_field2::count I've read in the docs mpl::fold is for the case. I tried to compose typedef boost::mpl::fold, boost::mpl::plus >

::type fcount;

but it won't compile. It seems I misundestood something.