Class CountOutputIterator

base/string/number.cpp:594–623

template <typename T>
class CountOutputIterator
{
public:
    CountOutputIterator() : m_count(0) {}
    CountOutputIterator& operator++()
    {
        ++m_count;
        return *this;
    }
    CountOutputIterator operator++(int)
    {
        CountOutputIterator org(*this);
        ++*this;
        return org;
    }
    CountOutputIterator& operator*()
    {
        return *this;
    }
    CountOutputIterator& operator=(T value)
    {
        return *this;
    }
    size_t Count() const
    {
        return m_count;
    }
private:
    size_t m_count;
};

size_t IntegerStringLength(int n)
{