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