Question

I want to create a native array and access it managed code. I don’t want to re write code to different types, (int, long, float, double) therefore tried using generics.

typedef int IND;

generic <typename T>
public ref class ntvarray
{
    void *pnt;
    IND sz;

public:
    ntvarray(IND length)
    {
        sz = sizeof(T);
        pnt =  ::operator new(length*sz);
    }

    ~ntvarray()
    {
        ::operator delete(pnt);
    }

    void* pointer()
    {
        return pnt;
    }

    T getitem (IND index)
    {
        //c3229
        return ((T*)pnt)[index];
    }

    void setitem (IND index, T value)
    {
        //c3229
        ((T*)pnt)[index] = value;
    }
};

I am getting the error and I know the reason for this error,

error C3229: 'T *' : indirections on a generic type parameter are not allowed

However is there a way to do this using generics? Any other way to do this, may be something else other than using generics?

Answer 1

No, you can’t do this using generics. But you can use templates. This avoids the code duplication, which your question emphasizes, but won’t allow run-time instantiation like generics would.