// (C) Copyright David Abrahams 2002. | |
// (C) Copyright Jeremy Siek 2002. | |
// (C) Copyright Thomas Witt 2002. | |
// 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_INDIRECT_ITERATOR_23022003THW_HPP | |
#define BOOST_INDIRECT_ITERATOR_23022003THW_HPP | |
#include <boost/iterator.hpp> | |
#include <boost/iterator/iterator_adaptor.hpp> | |
#include <boost/pointee.hpp> | |
#include <boost/indirect_reference.hpp> | |
#include <boost/detail/iterator.hpp> | |
#include <boost/detail/indirect_traits.hpp> | |
#include <boost/type_traits/is_same.hpp> | |
#include <boost/type_traits/add_reference.hpp> | |
#include <boost/mpl/bool.hpp> | |
#include <boost/mpl/identity.hpp> | |
#include <boost/mpl/eval_if.hpp> | |
#include <boost/mpl/not.hpp> | |
#include <boost/mpl/has_xxx.hpp> | |
#ifdef BOOST_MPL_CFG_NO_HAS_XXX | |
# include <boost/shared_ptr.hpp> | |
# include <boost/scoped_ptr.hpp> | |
# include <boost/mpl/bool.hpp> | |
# include <memory> | |
#endif | |
#include <boost/iterator/detail/config_def.hpp> // must be last #include | |
namespace boost | |
{ | |
template <class Iter, class Value, class Category, class Reference, class Difference> | |
class indirect_iterator; | |
namespace detail | |
{ | |
template <class Iter, class Value, class Category, class Reference, class Difference> | |
struct indirect_base | |
{ | |
typedef typename iterator_traits<Iter>::value_type dereferenceable; | |
typedef iterator_adaptor< | |
indirect_iterator<Iter, Value, Category, Reference, Difference> | |
, Iter | |
, typename ia_dflt_help< | |
Value, pointee<dereferenceable> | |
>::type | |
, Category | |
, typename ia_dflt_help< | |
Reference | |
, mpl::eval_if< | |
is_same<Value,use_default> | |
, indirect_reference<dereferenceable> | |
, add_reference<Value> | |
> | |
>::type | |
, Difference | |
> type; | |
}; | |
template <> | |
struct indirect_base<int, int, int, int, int> {}; | |
} // namespace detail | |
template < | |
class Iterator | |
, class Value = use_default | |
, class Category = use_default | |
, class Reference = use_default | |
, class Difference = use_default | |
> | |
class indirect_iterator | |
: public detail::indirect_base< | |
Iterator, Value, Category, Reference, Difference | |
>::type | |
{ | |
typedef typename detail::indirect_base< | |
Iterator, Value, Category, Reference, Difference | |
>::type super_t; | |
friend class iterator_core_access; | |
public: | |
indirect_iterator() {} | |
indirect_iterator(Iterator iter) | |
: super_t(iter) {} | |
template < | |
class Iterator2, class Value2, class Category2 | |
, class Reference2, class Difference2 | |
> | |
indirect_iterator( | |
indirect_iterator< | |
Iterator2, Value2, Category2, Reference2, Difference2 | |
> const& y | |
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 | |
) | |
: super_t(y.base()) | |
{} | |
private: | |
typename super_t::reference dereference() const | |
{ | |
# if BOOST_WORKAROUND(__BORLANDC__, < 0x5A0 ) | |
return const_cast<super_t::reference>(**this->base()); | |
# else | |
return **this->base(); | |
# endif | |
} | |
}; | |
template <class Iter> | |
inline | |
indirect_iterator<Iter> make_indirect_iterator(Iter x) | |
{ | |
return indirect_iterator<Iter>(x); | |
} | |
template <class Traits, class Iter> | |
inline | |
indirect_iterator<Iter,Traits> make_indirect_iterator(Iter x, Traits* = 0) | |
{ | |
return indirect_iterator<Iter, Traits>(x); | |
} | |
} // namespace boost | |
#include <boost/iterator/detail/config_undef.hpp> | |
#endif // BOOST_INDIRECT_ITERATOR_23022003THW_HPP |