[plt-scheme] using syntax objects as hash table keys  From: Doug
Orleans (dougo at place.org) Date: Sun May 16 17:02:35 EDT 2004
ifconfig nslookup writes:  > Why do you want to do that?  Not
sure how it's relevant to the question, but I'll tell anyway:  I
want to determine whether an expression implies the other, for
example #'(integer? x) implies #'(number? x).  I can assert that
#'integer? implies #'number?, but when I query those assertions,
I need to make sure the identifier in the expression refers to
the same binding as the one in the assertion.  And in order to
make the query efficient, it would help to use a hash table
instead of an alist.  --dougo at place.org  Posted on the users
mailing list.