gistfile1.cpp

template<typename T> struct iota_step final
{
	explicit iota_step(T init, const T increment) 
		: next(init), step(increment) {}

	iota_step& operator++()
	{
		next += step;
		return *this;
	}

	operator T() const { return next; }

private:
	T next;
	const T step;
};