a Delphi constructor (unlike those in C++) doesn't get called
implicitly (like for local variables or for args passed by value)
This means that to create one of these things you'll have to
explicitly call TMyGadget.Create (or use new ).
So how about writing a class function CreateBriefly that isn't
a constructor and call that instead. Make CreateBriefly
public and make the real Create constructor protected.
CreateBriefly will look like something like:
procedure TMyGadget.CreateBriefly;
var it:TMyGadget;
begin
it:=nil;
try
it:=TMyGadget.Create(); //call the protected constructor
finally
it.free;
end;
end;
then in all the places you currently call Create you
change these to calls to CreateBriefly.
Personally i think "doing stuff" other than just getting the object
properly initialised (like running a process) in a constructor is
bad design.
But I suppose that's debatable.
-ns
-----Original Message-----
From: Rohit Gupta <[EMAIL PROTECTED]>
To: Multiple recipients of list delphi <[EMAIL PROTECTED]>
Date: Thursday, October 26, 2000 15:32
Subject: [DUG]: Free inside Create
Whats the recommended way of executing Free (or Destroy) inside the
constructor ?
I have been using Free inside teh constructor which has worked under
Delphi3. Under Delphi 5, it karks it. Looking at the code, the idea now
seems naive.
BUT, I still want to do it. The object is like a process, all the work is
done in the constructor, after which its simples fot it to commit hara-kiri,
preferably a clean one.
Executing an abort inside the constructor calls the destructor,
unfortunately that leaves an unhandled exception. Having about 20 of these
beasts, I want the code to look simple and be foolproof.
---------------------------------------------------------------------------
New Zealand Delphi Users group - Delphi List - [EMAIL PROTECTED]
Website: http://www.delphi.org.nz
To UnSub, send email to: [EMAIL PROTECTED]
with body of "unsubscribe delphi"
---------------------------------------------------------------------------
New Zealand Delphi Users group - Delphi List - [EMAIL PROTECTED]
Website: http://www.delphi.org.nz
To UnSub, send email to: [EMAIL PROTECTED]
with body of "unsubscribe delphi"
