template metaprogramming

hey evryone im new to the forums and i have a very good question.
I think im getting good at C++ now, but still learning. i want to make a multiple dimension array using template metaprogramming i have made my own array class and now i wud like to make a dimensional array class. I know how template meta programming works but i still have no idea how to implent it so i can make a dimensional array.
can someone giveme some easy example code todo this without using any other classes so i can see what your doing.

thanks alot, mitsukai

Template metaprogramming is never easy.

Anyway. Here's a small template metaprogram that nests n vectors. (Requires partial template specialization.)

Code:

#include <vector>

// Recursive definition.
template<typename T, int N>
struct n_vector
{
  typedef std::vector< typename n_vector<T, N-1>::type > type;
};

// Termination clause.
template<typename T>
struct n_vector<T, 1>
{
  typedef std::vector<T> type;
};

Usage:

Code:

typedef typename n_vector<int, 3>::type my_vector;
// is equivalent to
// typedef std::vector< std::vector< std::vector< int > > > my_vector;

i created another problem wich i have no idea how to do.

Code:

template<typename t_T, unsigned long t_D>
class DArray : public Array< DArray<t_T, t_D - 1> > 
{
public:
	class DArray(const unsigned long& s, ...)
	{
		va_list val;
		va_start(val, s);

		unsigned long x;
		Array* y = *this;
		for(x = 1; x <= t_D; ++x)
		{
			y.Size = va_arg(val, unsigned long);
			y = *y.p_Array[0];
			//somehow initialize evry dimension to size of next arg
		}

		va_end(val);
	}
};

template<typename t_T>
class DArray<t_T, 1> : public Array<t_T>
{
};

i want it so i can use DArray<long, 2> x(5, 5); that will create a DArray 2 dimension with the size of 5 x 5, i think this is a very tough algorythm, i tried it but my mind is very limited to these such things, untill i actually learned how todo it... i cant think of anything that can do this. maybe some kind of dimension class that will initialize the needed dimensions...

help

Show the definition of Array.

Code:

template<typename t_T>
class Array

That's not the definition, just the declaration.

pmed

Uh ... no. No, I don't think I fancy diving into that. Sorry.

Just a hint, I think Array is about 10 times more complicated than it needs to be.

And stop PMing me.