C++でpythonのrange

range.cc

#include <iostream>
#include <iterator>

template <typename T>
class IncreasingNumberIterator: public std::iterator<std::input_iterator_tag, T>
{
private:
	T n_;
public:
	IncreasingNumberIterator(T n): n_(n) {}
	IncreasingNumberIterator(const IncreasingNumberIterator<T>& o): n_(o.n_) {}
	IncreasingNumberIterator& operator++() { ++n_; return *this; }
	bool operator==(const IncreasingNumberIterator<T>& rhs) { return n_ == rhs.n_; }
	bool operator!=(const IncreasingNumberIterator<T>& rhs) { return n_ != rhs.n_; }
	T& operator*() { return n_; }
};

template <typename T>
class Range
{
private:
	T begin_;
	T end_;
public:
	Range(T begin, T end): begin_(begin), end_(end) {}
	IncreasingNumberIterator<T> begin() { return IncreasingNumberIterator<T>(begin_); }
	IncreasingNumberIterator<T> end() { return IncreasingNumberIterator<T>(end_); }
};

template <typename T>
Range<T> range(T begin, T end)
{
	return Range<T>(begin, end);
}

int main(int argc, char *argv[])
{
	for (auto i : range(0, 10))
	{
		std::cout << i << std::endl;
	}
	return 0;
}