(fast-alist-free alist)throws away the hash table associated with a fast
Major Section: HONS-AND-MEMOIZATION
This documentation topic relates to the experimental extension of ACL2 supporting hash cons, fast alists, and memoization; see hons-and-memoization.
Logically, this function is the identity; we leave it enabled and would think it odd to ever prove a theorem about it.
Under the hood,
fast-alist-free removes the hash table associated with this
alist, if one exists. This effectively converts the alist into an ordinary
Because there is no automatic mechanism for freeing the hash tables used in
fast alists, to avoid memory leaks you should manually free any alists that
will no longer be used. You may find
fast-alist-summary useful in
tracking down alists that were not properly freed.
It is safe to call
fast-alist-free on any argument, including fast alists
that have already been freed and objects which are not alists at all.