operator[] and operator[][]

[Gyiove]

Hello everyone!

Here's a simple code:

int &operator[](int in) const
{
	cout << "pos:" << in << endl;
	return in; // lets just return that pos.
}

This is how we define the operator [] for class.
Now how would we define the operator [][] ?

tried:

int &operator[][](int in1, int in2) const
{
	cout << "pos:" << in1 << "/" << in2 << endl;
	return in+in2;
}

but compiler didn't like that at all.

Is it possible to define such a thing?
What I'm planning to create is something like this:
http://www.cplusplus.com/reference/map/map/

I would call it 1 dimensional map.
Now i want to create something what i would call 2 or 3 dimensional map.
If there is a way to define operator [][], perhaps there is a way to define
[][][] too?

Thank you!

[JLBorges]

#include <cstddef>

template < typename T, std::size_t N > struct A
{
    T& operator[] ( std::size_t pos ) { return array[pos] ; }
    const T& operator[] ( std::size_t pos ) const { return array[pos] ; }

    T array[N] ;
};

int main()
{
    A< int, 10 > a1d ;
    a1d[4] = 45 ;

    A< A<int,10>, 6 > a2d ;
    a2d[4][3] = 99 ;

    A< A< A<int,10>, 7 >, 6 > a3d ;
    a3d[4][3][2] = 8 ;
}

[Gyiove]

a map inside of map im stupid, my apologies.
this would be my solution:

map<int,map<int,map<int,int>>> my3dmap

thanks, i should have taken more time to think about it.