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Added Shared Container Iterator adaptor to iterator adaptor library.

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[SVN r15169]
This commit is contained in:
Ronald Garcia
2002-09-05 14:05:29 +00:00
parent 34c159dd8d
commit a586f20d19
1 changed files with 58 additions and 0 deletions
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include/boost/shared_container_iterator.hpp Normal file
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// (C) Copyright Ronald Garcia 2002. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
#ifndef SHARED_CONTAINER_ITERATOR_RG08102002_HPP
#define SHARED_CONTAINER_ITERATOR_RG08102002_HPP
#include "boost/iterator_adaptors.hpp"
#include "boost/shared_ptr.hpp"
#include <utility>
namespace boost {
template <typename Container>
struct shared_container_iterator_policies :
public boost::default_iterator_policies {
typedef boost::shared_ptr<Container> container_ref_t;
container_ref_t container_ref;
shared_container_iterator_policies(container_ref_t const& c) :
container_ref(c) { }
shared_container_iterator_policies() { }
};
template <typename Container>
class shared_container_iterator_generator {
typedef typename Container::iterator iterator;
typedef shared_container_iterator_policies<Container> policy;
public:
typedef boost::iterator_adaptor<iterator,policy> type;
};
template <typename Container>
typename shared_container_iterator_generator<Container>::type
make_shared_container_iterator(typename Container::iterator iter,
boost::shared_ptr<Container> const& container) {
typedef typename shared_container_iterator_generator<Container>::type
iterator;
typedef shared_container_iterator_policies<Container> policy;
return iterator(iter,policy(container));
}
template <typename Container>
std::pair<
typename shared_container_iterator_generator<Container>::type,
typename shared_container_iterator_generator<Container>::type>
make_shared_container_range(boost::shared_ptr<Container> const& container) {
return
std::make_pair(
make_shared_container_iterator(container->begin(),container),
make_shared_container_iterator(container->end(),container));
}
} // namespace boost
#endif // SHARED_CONTAINER_ITERATOR_RG08102002_HPP