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28 lines
619 B
C++
28 lines
619 B
C++
#pragma once
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#include <boost/iterator/iterator_facade.hpp>
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namespace stl_iterator_detail
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{
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struct Dummy
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{
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template <class T> Dummy & operator=(T const &) { return *this; }
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};
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} // namespace stl_iterator_detail
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class CounterIterator :
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public boost::iterator_facade<CounterIterator, stl_iterator_detail::Dummy, boost::forward_traversal_tag>
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{
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size_t m_count;
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public:
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CounterIterator() : m_count(0) {}
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size_t GetCount() const { return m_count; }
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stl_iterator_detail::Dummy & dereference() const
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{
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static stl_iterator_detail::Dummy dummy;
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return dummy;
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}
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void increment() { ++m_count; }
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};
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