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#pragma once
#include "../std/iterator_facade.hpp"
#include <boost/iterator/transform_iterator.hpp>
using boost::make_transform_iterator;
namespace detail
{
struct Dummy
{
template <class T> Dummy & operator=(T const &) { return *this; }
};
}
class CounterIterator :
public iterator_facade<CounterIterator, detail::Dummy, forward_traversal_tag>
{
size_t m_count;
public:
CounterIterator() : m_count(0) {}
size_t GetCount() const { return m_count; }
detail::Dummy & dereference() const
{
static detail::Dummy dummy;
return dummy;
}
void increment() { ++m_count; }
};
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