locatives...

[Timothy Daly <DALY@ibm.com>]

Re: locatives

We also have felt the need to do hashing-on-eq type of operations.
That is, we would like to be able to hash a pair consisting
of (address of left subtree . address of right subtree).
Unfortunately, SXHASH will walk both subtrees which is much
too expensive. We could think of no portable way to implement
this in common lisp. Since the language gives us no way to
implement this it does not seem that locatives are a frill.

tim
DALY@IBM.COM
T.J.Watson Research, Yorktown.