09/03/21 12:06:26
class step_iterator : public boost::iterator_facade<step_iterator,int , boost::bidirectional_traversal_tag>
{
public:
explicit step_iterator(int v, int s = 1):value(v), step(s){}
private:
friend class boost::iterator_core_access;
void increment()
{
value += step;
}
void decrement()
{
value -= step;
}
int& dereference() const
{
return value;
}
bool equal(const step_iterator& other) const
{
return value >= other.value;
}
int value;
int step;
};