Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!ucsd!ucbvax!UM.CC.UMICH.EDU!Paul_Abrahams%Wayne-MTS
From: Paul_Abrahams%Wayne-MTS@UM.CC.UMICH.EDU
Newsgroups: comp.lang.icon
Subject: Generating variables
Message-ID: <266508@Wayne-MTS>
Date: 2 Nov 90 19:33:12 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: inet
Organization: The Internet
Lines: 26


 
The Icon operator ! generates a sequence of variables when it's applied to
a list, string, or record.  My question is: is there any way that a
user-defined procedure can generate variables (other than using the "variable"
function)?  Here is my attempt at it; it didn't work.
 
Paul Abrahams
abrahams%wayne-mts@um.cc.umich.edu
 
 
procedure main ()
   l := [1,2,3,4]
   every writes(!l, " ")
   write() # writes 1 2 3 4
   every !l := 9
   every writes(!l, " ")
   write() # writes 9 9 9 9
   every !p1(l) := 7  # produces an error; can't assign 7 to "9"
   every writes(!l, " ")
   write()
end
 
procedure p1(z)
   suspend !z
end