boost/shared_container_iterator.hpp

   1 // (C) Copyright Ronald Garcia 2002. Permission to copy, use, modify, sell and
   2 // distribute this software is granted provided this copyright notice appears
   3 // in all copies. This software is provided "as is" without express or implied
   4 // warranty, and with no claim as to its suitability for any purpose.
   5
   6 // See http://www.boost.org/libs/utility/shared_container_iterator.html for documentation.
   7
   8 #ifndef SHARED_CONTAINER_ITERATOR_RG08102002_HPP
   9 #define SHARED_CONTAINER_ITERATOR_RG08102002_HPP
  10
  11 #include "boost/iterator_adaptors.hpp"
  12 #include "boost/shared_ptr.hpp"
  13 #include <utility>
  14
  15 namespace boost {
  16
  17 template <typename Container>
  18 class shared_container_iterator : public iterator_adaptor<
  19                                     shared_container_iterator<Container>,
  20                                     typename Container::iterator> {
  21
  22   typedef iterator_adaptor<
  23     shared_container_iterator<Container>,
  24     typename Container::iterator> super_t;
  25
  26   typedef typename Container::iterator iterator_t;
  27   typedef boost::shared_ptr<Container> container_ref_t;
  28
  29   container_ref_t container_ref;
  30 public:
  31   shared_container_iterator() { }
  32
  33   shared_container_iterator(iterator_t const& x,container_ref_t const& c) :
  34     super_t(x), container_ref(c) { }
  35
  36
  37 };
  38
  39 template <typename Container>
  40 shared_container_iterator<Container>
  41 make_shared_container_iterator(typename Container::iterator iter,
  42                                boost::shared_ptr<Container> const& container) {
  43   typedef shared_container_iterator<Container> iterator;
  44   return iterator(iter,container);
  45 }
  46
  47
  48
  49 template <typename Container>
  50 std::pair<
  51   shared_container_iterator<Container>,
  52   shared_container_iterator<Container> >
  53 make_shared_container_range(boost::shared_ptr<Container> const& container) {
  54   return
  55     std::make_pair(
  56       make_shared_container_iterator(container->begin(),container),
  57       make_shared_container_iterator(container->end(),container));
  58 }
  59
  60
  61 } // namespace boost
  62 #endif  // SHARED_CONTAINER_ITERATOR_RG08102002_HPP