| // (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 |