dumb c++ question

[Proto]

I know this is stupi but i dunno how to do it

i have this little template

template<class T>
struct nodoLista
{
T info;
nodoLista *siguiente;
};

typedef nodoLista* ApuntadorNodo; //the compiler marks error here

How can i correctly do a pointer of that type of template structure

[RamsusX]

Since a template isn't a real implementation, but a skeleton for one that can be generated by the compiler for every type of object you use it with, I don't think you can typedef a template. Consider using void *T with a regular struct (no templates), or implementing a class template for the Node that makes use of references instead of a struct template.

[Proto]

well then i guess it would go in the lines of this

template[class T]
class nodoLista
{
T info;
nodoLista *siguiente;
};

still... how can i make a pointer to a template class...would it be (nodolista*)[T]

with <> instead of []

[RamsusX]

You can't make a type that is a pointer to a class template. You have to go about this in a different manner.

This is because you need to use a template in the manner:
templateClassName&lt;type&gt; name;

So we use:

template <class T>
struct nodoLista
{
  T *info;
  nodoLista <T> *siguiente;
};

But if you want to implement a linked list in C++ using templates, then use a class AS a class, complete with members and methods and fully encapsulated.

Do this by implementing a Node class, then creating a List class that maintains a linked list of Node's.

*Edit: For creating nodes, use code like the following:

/* ...  */
    int *x = new int;
    *x = 4;
    int y = 2;
    nodoLista <int> *nodo = new nodoLista<int>;
    nodo->info = x;
    nodo->info = &y;
    delete nodo;
    delete x;
/* ... */

[Proto]

Ok, thx, sorry for being so annoying, but is there a way for the class to wait for the execution to assign the type to a template variable, or do i have to define it on the code?

[RamsusX]

You have to assign a type to the template in the code so that the compiler knows what type the template is when compiling.

However, if typesafety isn't an issue, then you can also use void * pointers to point to objects of any type.

struct nodoLista
{
  void *info;
  nodoLista *siguente;
};

/* ... */
  int p = 2;
  char c = 'A';
  nodoLista *nodo = new nodoLista;
  nodo->info = &p;
  nodo->info = &c;
  delete nodo;
/* ... */