clone method of Object

[grauzone]

grauzone wrote:
> Qian Xu wrote:
>> Hi All,
>>
>> is there any (easy) way to clone an object or any other classes?
>>
>>
>> --Qian
> 
> Simple answer: No.
> 
> Complicated answer: Yes, but you have to write it yourself.
> 
> Here's a nice starting point. You can use tupleof to get all members of 
> a class. Note that this doesn't deal with superclasses, and members of 
> superclasses are not copied:
> 
> T clone(T)(T old) {
>     auto newobject = new T();
>     foreach (int i, _; old.tupleof) {
>         newobject.tupleof[i] = old.tupleof[i];
>     }
>     return newobject;
> }
> 
> cloned = clone(yourobject);

I should add that members of subclasses are not copied either. E.g. if 
you have

class A {int a;}
class B : A {int b;}
class C : B {int c;}

B someobject;
clone(someobject);

the clone method will only copy member b, but not a or c.