VertexToPointIterator.h

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#ifndef VertexToPointIterator_HEADER
#define VertexToPointIterator_HEADER

#include <boost/iterator/transform_iterator.hpp>
#include <boost/pointee.hpp>

// Given a vertex iterator, create a point iterator.
template <class VertexP, unsigned d> struct VertexToPoint {
  typedef const typename Geometry::Point<d>& result_type;
  result_type operator() (const VertexP v) const {
    return v->toPoint();
  }
};

template <class vertex_iterator, unsigned d>
struct VertexToPointIterator : public boost::transform_iterator
              < VertexToPoint < typename boost::pointee <vertex_iterator> :: type , d >
              , vertex_iterator
              >
{
  typedef VertexToPoint<typename boost::pointee<vertex_iterator> :: type, d> VtP;
  typedef boost::transform_iterator<VtP, vertex_iterator> super;

  VertexToPointIterator(const vertex_iterator& iit) : super(iit, VtP()) { }
};

template <unsigned d, class vertex_iterator>
VertexToPointIterator <vertex_iterator,d> vertex_to_point(const vertex_iterator& it) {
  return it;
}

#endif

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