author | mikek |
Mon, 10 May 2010 19:54:49 +0100 | |
changeset 2 | 39c28ec933dd |
permissions | -rwxr-xr-x |
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// (C) Copyright David Abrahams 2002. |
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// (C) Copyright Jeremy Siek 2002. |
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// (C) Copyright Thomas Witt 2002. |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_INDIRECT_ITERATOR_23022003THW_HPP |
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#define BOOST_INDIRECT_ITERATOR_23022003THW_HPP |
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#include <boost/iterator.hpp> |
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#include <boost/iterator/iterator_adaptor.hpp> |
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#include <boost/pointee.hpp> |
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#include <boost/indirect_reference.hpp> |
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#include <boost/detail/iterator.hpp> |
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#include <boost/detail/indirect_traits.hpp> |
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#include <boost/type_traits/is_same.hpp> |
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#include <boost/type_traits/add_reference.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/mpl/identity.hpp> |
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#include <boost/mpl/eval_if.hpp> |
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#include <boost/mpl/not.hpp> |
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#include <boost/mpl/has_xxx.hpp> |
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#ifdef BOOST_MPL_CFG_NO_HAS_XXX |
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# include <boost/shared_ptr.hpp> |
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# include <boost/scoped_ptr.hpp> |
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# include <boost/mpl/bool.hpp> |
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# include <memory> |
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#endif |
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#include <boost/iterator/detail/config_def.hpp> // must be last #include |
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namespace boost |
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{ |
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template <class Iter, class Value, class Category, class Reference, class Difference> |
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class indirect_iterator; |
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namespace detail |
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{ |
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template <class Iter, class Value, class Category, class Reference, class Difference> |
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struct indirect_base |
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{ |
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typedef typename iterator_traits<Iter>::value_type dereferenceable; |
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typedef iterator_adaptor< |
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indirect_iterator<Iter, Value, Category, Reference, Difference> |
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, Iter |
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, typename ia_dflt_help< |
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Value, pointee<dereferenceable> |
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>::type |
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, Category |
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, typename ia_dflt_help< |
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Reference |
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, mpl::eval_if< |
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is_same<Value,use_default> |
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, indirect_reference<dereferenceable> |
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, add_reference<Value> |
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> |
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>::type |
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, Difference |
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> type; |
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}; |
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template <> |
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struct indirect_base<int, int, int, int, int> {}; |
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} // namespace detail |
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template < |
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class Iterator |
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, class Value = use_default |
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, class Category = use_default |
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, class Reference = use_default |
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, class Difference = use_default |
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> |
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class indirect_iterator |
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: public detail::indirect_base< |
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Iterator, Value, Category, Reference, Difference |
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>::type |
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{ |
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typedef typename detail::indirect_base< |
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Iterator, Value, Category, Reference, Difference |
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>::type super_t; |
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friend class iterator_core_access; |
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public: |
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indirect_iterator() {} |
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indirect_iterator(Iterator iter) |
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: super_t(iter) {} |
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template < |
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class Iterator2, class Value2, class Category2 |
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, class Reference2, class Difference2 |
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> |
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indirect_iterator( |
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indirect_iterator< |
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Iterator2, Value2, Category2, Reference2, Difference2 |
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> const& y |
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, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 |
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) |
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: super_t(y.base()) |
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{} |
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private: |
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typename super_t::reference dereference() const |
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{ |
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# if BOOST_WORKAROUND(__BORLANDC__, < 0x5A0 ) |
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return const_cast<super_t::reference>(**this->base()); |
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# else |
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return **this->base(); |
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# endif |
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} |
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}; |
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template <class Iter> |
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inline |
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indirect_iterator<Iter> make_indirect_iterator(Iter x) |
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{ |
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return indirect_iterator<Iter>(x); |
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} |
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template <class Traits, class Iter> |
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inline |
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indirect_iterator<Iter,Traits> make_indirect_iterator(Iter x, Traits* = 0) |
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{ |
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return indirect_iterator<Iter, Traits>(x); |
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} |
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} // namespace boost |
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#include <boost/iterator/detail/config_undef.hpp> |
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#endif // BOOST_INDIRECT_ITERATOR_23022003THW_HPP |