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_REVERSE_ITERATOR_23022003THW_HPP |
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#define BOOST_REVERSE_ITERATOR_23022003THW_HPP |
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#include <boost/iterator.hpp> |
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#include <boost/utility.hpp> |
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#include <boost/iterator/iterator_adaptor.hpp> |
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namespace boost |
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{ |
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// |
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// |
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// |
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template <class Iterator> |
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class reverse_iterator |
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: public iterator_adaptor< reverse_iterator<Iterator>, Iterator > |
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{ |
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typedef iterator_adaptor< reverse_iterator<Iterator>, Iterator > super_t; |
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friend class iterator_core_access; |
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public: |
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reverse_iterator() {} |
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explicit reverse_iterator(Iterator x) |
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: super_t(x) {} |
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template<class OtherIterator> |
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reverse_iterator( |
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reverse_iterator<OtherIterator> const& r |
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, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0 |
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) |
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: super_t(r.base()) |
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{} |
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private: |
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typename super_t::reference dereference() const { return *boost::prior(this->base()); } |
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void increment() { --this->base_reference(); } |
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void decrement() { ++this->base_reference(); } |
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void advance(typename super_t::difference_type n) |
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{ |
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this->base_reference() += -n; |
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} |
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template <class OtherIterator> |
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typename super_t::difference_type |
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distance_to(reverse_iterator<OtherIterator> const& y) const |
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{ |
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return this->base_reference() - y.base(); |
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} |
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}; |
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template <class BidirectionalIterator> |
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reverse_iterator<BidirectionalIterator> make_reverse_iterator(BidirectionalIterator x) |
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{ |
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return reverse_iterator<BidirectionalIterator>(x); |
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} |
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} // namespace boost |
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#endif // BOOST_REVERSE_ITERATOR_23022003THW_HPP |