[elephant-devel] Unique persistent slot value

[Warren Lynn]

Hi,

Is there a simple way to ensure that values of a persistent slot must be
unique? Namely, when a instance is persisted (either with the plain
make-instance or at the end of a transaction), an error of condition will be
thrown if the slot value is not unique. Thank you.

Warren
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.common-lisp.net/pipermail/elephant-devel/attachments/20100529/5e1e7f63/attachment.html>