[climacs-devel] update-syntax and delegating buffers

[Aleksandar Bakic]

One thing that breaks is this piece of update-syntax:

	 (setf scan (make-instance 'standard-left-sticky-mark
		       :buffer buffer

It assumes that buffer is a standard-buffer instance and finds handy that
make-instance for marks is part of the buffer protocol. One way to do the above
with a delegating-buffer instance is to clone its low-mark, for example (whose
buffer would be the implementation buffer). (If we go this route, we'll
probably want to add another optional parameter to clone-mark, the offset.)

Alex

PS. I'll try to investigate further...

--- Aleksandar Bakic <a_bakic at yahoo.com> wrote:

> > Well, what happens to ordinary climacs code if the two update-syntax
> > methods don't delegate?  In theory, they should be using the buffer
> > protocol to interact with their buffer argument, so everything should
> > carry on working transparently...
> 
> I will see what exactly breaks (in your case, name-mixin is not in the buffer
> protocol) and will let you know soon.
> 
> Alex
> 
> 
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