Re: Convertion question.

Adrian

> Hello... I am trying to migate a C++ program to Delphi. The problem that
> I've found is that it uses a lot of  "copy constructors" and I really don't
> know if they exists in Delphi. I started by making a copy by hand for every
> type object that I found but now it is impossible to manage. So... the
> question is... Do copy constructors exist in Delphi?

No, not really...

IIRC copy constructors are involved because of the
object model C++ utilizes. 

Objects, in C++, are more or less, similar to Object Pascal's
records (i.e. structures) unless you create the object 
by using the new operator. When a (structure-like) object
is passed to a function its copy constructor is called in
order to create a copy of the object.

When the object is really a pointer to a memory area
there is no such need. (And as a plus you have the 
benefit of polymorphism of course)

I hope I remember correct...

The closest to the copy constructor notion of the C++ is
the TPersistent.Assign() virtual method of the Object Pascal.
Of course you have to override it and provide the extra
assignments, inside the overriden methods, your derived classes demand.

Theo
-----------------------------------
Theo Bebekis
Thessaloniki, Greece
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