Creating a type alias for a templated class

Answer 1

What you would really want is a templated typedef. Unfortunately those are not supported in the current version of C++, but they will be added in C++0x.

For now, here's a possible workaround:

template<class T> struct My {
    typedef std::vector<T> Array;
};

My<Object>::Array ObjectArray

Whether or not that is better than simply using std::vector directly, I'll leave to you to decide.

Answer 2

As of C++11 you can use a templated type alias

template <typename T>
using MyArray = std::vector<T>;

If you want to be more generic you can use a variadic template (which would allow for allocators in the case of vector without having to be specific)

template <typename... Ts>
using MyArray = std::vector<Ts...>;

Answer 3

Another way:

#include <vector>

template <typename T>
struct MyArray
    :std::vector<T>
{
};

void func()
{
    MyArray<int> my;

    my.push_back(5);

    MyArray<int>::iterator i;
}

Compiles for me, but you may find that some things available in vector<> need to be "pulled up" into MyArray.