iterator_category type not defined by vector<int>

[SSteven]

I have implemented the iterator_traits struct as follows:

template<typename Iter>
struct Estd::iterator_traits
{
   using value_type = typename Iter::value_type;
   using difference_type = typename Iter::difference_type;

   /// pointer type
   using pointer = typename Iter::pointer;

   /// reference type
   using reference = typename Iter::reference;

   /// tag
   using iterator_category =
            typename Iter::iterator_category;
};

I have tried testing this with the following test code:

void test()
{
   /// int
   Estd::iterator_traits<vector<int>>::value_type i {5};
}

However, I get the following compilation error:

In instantiation of struct Estd::iterator_traits<vector<int>>
error: no type named 'iterator_category' in class std::vector<int>

However, in other contexts, I have tried accessing std::iterator_traits<Iter>::iterator_category and it works just fine.

What could be the problem?

Thanks.

[JLBorges]

// Estd::iterator_traits<vector<int>>::value_type i {5};
Estd::iterator_traits< vector<int>::iterator >::value_type i {5};