[Boost-users] MPL and lambda

Subject: [Boost-users] MPL and lambda
From: Joseph Winston (josephwinston_at_[hidden])
Date: 2010-02-03 13:37:55

In http://lists.boost.org/Archives/boost/2003/11/56289.php, there was
a question on how one should locate all the mpl::pair's that match a
given type when one was only interested in the first item in the pair. 
The suggested solution looked like something like this:

#include <boost/mpl/vector.hpp>
#include <boost/mpl/pair.hpp>
#include <boost/mpl/find.hpp>
#include <boost/mpl/transform_view.hpp>

int
main(int, char **)
{
    using namespace boost;

    typedef mpl::vector< mpl::pair<int, int*>, mpl::pair<short, short*>, 
mpl::pair<long, long*>, mpl::pair<char, char*> > pairs;

    typedef mpl::find< mpl::transform_view< pairs, mpl::select1st<> >, 
long >::type::base iter;
}

However, mpl::select1st<> no longer is a part of boost and I don't see
how to accomplish this despite having "C++ Template Metaprogramming"
in my hands.  I'd like to know what is the correct way in a recent
version of boost, to accomplish this.