On Thu, 17 Aug 2006, Albert Zeyer wrote:
No, it will not. Reference counting with interfaces only works if you
use interfaces as referencing types (so it has to be 'var MyObject:
IUnknown'), all class-typed variables will not counted. I think this is
because all class-typed variables are simply pointers and an interface
variable is handled special (like a smart-pointer-structure in C++,
which capsulate a pointer and does the reference counting automatically
for you; this works, because a smart-pointer is constructed on the heap
and so, it will automatically call the destructor if it goes out of
scope).
Is there a way to make a smart-pointer in pascal? Is it possible to
create objects on the heap so that they will get destroyed and freed
automatically when they get out of scope? Or is there a way to get
informed if a class-typed variable get out of scope?
No.
This has been discussed in the past, but no clean implementation could
be found, so the idea was dropped.
Michael.
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