unbound variable detection

Article View: comp.lang.scheme.c

Article #196

Back to comp.lang.scheme.c Previous Next

#196

From: Kardan Kaveh
Date: Fri, 22 Jan 1993 04:46

20 lines
794 bytes

Is it possible to tell if a given variable is undefined?

For example, something along the lines of:

(define x 3)

(bound? x) --> #t

(bound? y) --> #f

Thanks,

Kaveh


-- 
------------
Kaveh Kardan                                       kaveh@taarna.UUCP
Systeme Taarna                                     kardank@eole.umontreal.qc.ca
Montreal Quebec Canada                             (514)844-8448

Technical Details

Message-ID: <1993Jan22.044623.19581@cc.umontreal.ca>

Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!charnel!sifon!CC.UMontreal.CA!kardank

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!charnel!sifon!CC.UMontreal.CA!kardank
From: kardank@ERE.UMontreal.CA (Kardan Kaveh)
Newsgroups: comp.lang.scheme.c
Subject: unbound variable detection
Message-ID: <1993Jan22.044623.19581@cc.umontreal.ca>
Date: 22 Jan 93 04:46:23 GMT
Sender: news@cc.umontreal.ca (Administration de Cnews)
Organization: Universite de Montreal
Lines: 20