Compiling shared example.

[Peter Sommerfeld]

To learn about shared attribute I've copied nearly verbatim an
example from Andreis book. The code:
import core.atomic;

struct Data{
  int value;
}

shared struct SharedStack(T) {

  private shared struct Node{
    T data;
    Node* next;
    this(T value){data = value;};
  }
  private Node* root;

  // push

  void push(T value){
    auto n = new Node(value);
    shared(Node)* oldRoot;
    do {
      oldRoot = root;
      n.next = oldRoot;
    } while(!cas(&root,oldRoot,n)); // line 30
  }
  // ...
}

SharedStack!(Data) q;

void main(string[] args){

  Data m;
  q.push(m); // line 40
}

I got the following error (dmd 2.060 win):

(40) Error function main.SharedStack!(Data).SharedStack.push(Data value)
shared is not callable using argument types (Data)

(30) template core.atomic.cas does not match any function template  
declaration

What is wrong here ?

Peter