🚀 go-pugleaf

I was wondering when you want to access a method in an 'interface
implementation class' what is the best way?

I have seen both types of examples; which are listed below. I take it for
example2 I would need to free the object after I have finished with it: I am
guessing example2 would not use reference counting ?

TIA

Simon.


Type

  IInterfaceExample = interface(IInterface)
    ['{24868058-9C85-48C4-97E7-D0D730F61962}']
    function add(a,b : Integer) : Integer; stdcall;
  end;

   TInterFaceExample = class(TInterfacedObject,IInterfaceExample)
    function add(a,b : Integer) : Integer; stdcall;
  end;

 implementation

  function TInterfaceExample.add(a, b: Integer): Integer;
  begin
    result := a+b;
  end;

 var
   classInterfaceExample : TInterfaceExample;
   interInterfaceExample : IInterfaceExample;

  begin

   //Example 1 for accessing function
     interInterfaceExample := TInterfaceExample.create;
     answer := interInterfaceExample1.add(1,2);
     showMessage(format('%d',[answer]));

   //Example 2 for accessing function
     classInterfaceExample := TinterfaceExample.Create;
     answer := classInterfaceExample.add(1,2);
     showMessage(format('%d',[answer]));
     classInterfaceExample.Free;

 end;