Checked_iter

[firix]

Hi,

I try configure Checked_iter but not complate.
Could you be helpful me ? Could you be helpful me ?

template<class Cont, class iter = typename Cont::iterator>
class Checked_iter : public iterator_traits<iter>{
	iter curr;
	Cont *c;
public:
	void valid(iter p)
	{
		if (c->end() == p)
			return;
		for (iter pp = c->begin();  pp != c->end() ++pp)
			if (pp == p)
				return;
		throw out_of_range;
	}

	friend bool operator ==(const Checked_iter &i, const Checked_iter &j)
	{
		return i.c == j.c && i.curr  == j.curr;
	}

	Checked_iter(Cont &x, iter p):c(x), curr(p){valid(p);}
	reference_type operator *()
	{
		if (curr == c->end())
			throw out_of_range;
		return *curr;
	}

	pointer_type operator->()
	{
		return &*curr;
	}

	Checked_iter operator+(Dist d)
	{
		if (c->end() - curr  <= d)
			throw out_of_range;
		return Checked_iter(c, curr + d);
	}

	reference_type operator[](Dist d)
	{
		if (c->end() - curr  <= d)
			throw out_of_range;
		return c[d];
	}

	Checked_iter &operator++()
	{
		if (cuur == c->end())
			throw out_of_range;
		++curr;
		return *this;

	}

	Checked_iter &operator++(int)
	{
		Checked_iter tmp = *this;
		++*this;
		return tmp;
	}

	Checked_iter &operator--()
	{
		if (cuur == c->end())
			throw out_of_range;
		--curr;
		return *this;

	}

	Checked_iter &operator--(int)
	{
		Checked_iter tmp = *this;
		--*this;
		return tmp;
	}


	difference_type index()
	{
		return curr - c.begin();
	}

	iter unchecked()
	{
		return curr;
	}


	friend bool operator ==(const Checked_iter &i, const Checked_iter &j);
};

bool operator ==(const Checked_iter &i, const Checked_iter &j)
{
	return i.c == j.c && i.curr  == j.curr;	
}

thank in advance...