Re: Custom iterator for STL-style container

The container is:

template <typename T>
class Container {
public:
        // container methods..

        // iterator:
        class const_iterator {
        public:
                const_iterator(T* i)
                        : pntr(i) { }

                const_iterator& operator=
(const_iterator);
                const_iterator& operator++();
                const_iterator operator++(const_iterator);

                const_iterator& operator--();
                const_iterator operator--(const_iterator);

                bool operator==(const_iterator);
                bool operator!=(const_iterator);

        private:
                T* pntr;
        };

        const_iterator begin() const;
        const_iterator end() const;

private:
        std::vector<T> v;

};

// Well... implementation for Container<T>::begin() :
template <typename T>
Container<T>::const_iterator Container<T>::begin() const

{
        const_iterator i(&v[0]);
        return i;

}

g++ says: "error: expected constructor, destructor, or type conversion
before 'Container'"
Where is it wrong? Which is the right way to do that?