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Re: Copying an object [message #17074 is a reply to message #17025]

Fri, 03 September 1999 00:00

steinhh
Messages: 260
Registered: June 1994

Senior Member

Since the documentation for STRUCT_ASSIGN in 5.2.1 says
that both destination and source may be an object reference
when used inside an object method, the only "problem" is to make an
uninitialized instance of the object (like val = {STRUCT_NAME}).
But this could easily be implemented in an object's init method,
thus:

FUNCTION BLAH::INIT,....,CLONE=CLONE

IF OBJ_VALID(CLONE) THEN BEGIN
IF NOT OBJ_CLASS(CLONE) EQ OBJ_CLASS(SELF) THEN ... ;ERROR
STRUCT_ASSIGN,CLONE,SELF
RETURN,1
END
:
: ;; Non-clone initialization code
END

which would be called like this:

clone = OBJ_NEW('BLAH',CLONE=ORIGINAL)

Of course, this doesn't deal with issues of "parents" or other
pointers to the cloned objects. But this will have to be dealt
with for each specific type of object.

Regards,

Stein Vidar

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[Message index]

		Copying an object By: Waleed Al-Nuaimy on Tue, 31 August 1999 00:00
		Re: Copying an object By: Ben Tupper on Fri, 03 September 1999 00:00
		Re: Copying an object By: davidf on Fri, 03 September 1999 00:00
		Re: Copying an object By: steinhh on Fri, 03 September 1999 00:00

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