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Moved shared_container_iterator.hpp in iterator directory, modernized code.

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shared_container_iterator now uses std::shared_ptr to store the reference
to the container. boost::shared_ptr is still supported and is wrapped
into std::shared_ptr on construction, so there is overhead due to allocation
of std::shared_ptr state. Going forward, std::shared_ptr is expected
to be the primary use case. As a bonus, this eliminates the dependency
on Boost.SmartPtr.

Moved shared_container_iterator.hpp into the iterator directory and left
a forwarding header for backward compatibility.
This commit is contained in:
Andrey Semashev
2025-02-07 02:07:12 +03:00
parent e446c6e05c
commit a7150173ed
9 changed files with 230 additions and 123 deletions
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71
include/boost/shared_container_iterator.hpp
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@ -1,69 +1,14 @@
// (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.
// See http://www.boost.org/libs/utility/shared_container_iterator.html for documentation.
// (C) Copyright Andrey Semashev 2025.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_SHARED_CONTAINER_ITERATOR_HPP
#define BOOST_SHARED_CONTAINER_ITERATOR_HPP
#include "boost/iterator_adaptors.hpp"
#include "boost/shared_ptr.hpp"
#include <utility>
// This is a deprecated header left for backward compatibility.
// Please use <boost/iterator/shared_container_iterator.hpp> instead.
namespace boost {
namespace iterators {
#include <boost/iterator/shared_container_iterator.hpp>
template <typename Container>
class shared_container_iterator : public iterator_adaptor<
shared_container_iterator<Container>,
typename Container::iterator> {
typedef iterator_adaptor<
shared_container_iterator<Container>,
typename Container::iterator> super_t;
typedef typename Container::iterator iterator_t;
typedef boost::shared_ptr<Container> container_ref_t;
container_ref_t container_ref;
public:
shared_container_iterator() { }
shared_container_iterator(iterator_t const& x,container_ref_t const& c) :
super_t(x), container_ref(c) { }
};
template <typename Container>
inline shared_container_iterator<Container>
make_shared_container_iterator(typename Container::iterator iter,
boost::shared_ptr<Container> const& container) {
typedef shared_container_iterator<Container> iterator;
return iterator(iter,container);
}
template <typename Container>
inline std::pair<
shared_container_iterator<Container>,
shared_container_iterator<Container> >
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 iterators
using iterators::shared_container_iterator;
using iterators::make_shared_container_iterator;
using iterators::make_shared_container_range;
} // namespace boost
#endif
#endif // BOOST_SHARED_CONTAINER_ITERATOR_HPP