What is stack based class?

Question

Possible Duplicate:
How to prevent an object being created on the heap?

Hi,

I heard a concept called as stack based class. I.e. we can’t create instance of the class using new.

I am hearing this for the first time. One way to implement this by private overloading of ‘new ’ operator.

If anybody know details about the stack based class please inform me.

Answer 1

Instead of overloading new operator follow the Factory pattern.

• A static method to create new instances of this class.
• An access method to get the last instance (from the top of stack)

Answer 2

It's all in the instantiation:

AnotherClass::SomeMethod(...) {
  MyClass stackBased;
  MyClass *heapBased;

  *heapBased = new MyClass();
  *heapBased->DoSomething();
  delete heapBased;

  stackBased.DoSomething();

  ...
}

A stackbased class is automatically allocated, instantiated and deallocated on the stack, whereas you need to do it all by yourself for a heapbased.