ARGUMENTS/VALUES -> CONSUME/PRODUCE

[gls@think.com (Guy Steele)]

   Date: Fri, 8 Sep 89 15:55 EDT
   From: Kent M Pitman <KMP@stony-brook.scrc.symbolics.com>
   ...
   Actually, CONTINUE seems to me to be the right name for VALUES, not
   for CALL-WITH-VALUES!
   ...
   For CALL-WITH-VALUES, I suggest the name should be 
     (CALL-WITH-CONTINUATION fn continuation)
   where the idea would be to think of the second function as effectively
   promoted to the status of a continuation. (When that continuation `runs out,'
   the current continuation receives its values.)
     (CALL-WITH-CONTINUATION (LAMBDA () (CONTINUE 1 2)) CONS)
     => (1 . 2)

   I think this has a very nice look to it.

Very nice indeed.  A lot worse ideas have appeared (including mine).
Notice that the idiom for returning no values is thus (CONTINUE).
And I can write

	(DO ((J 0 (+ J 1)))
	    ((= J 10))
	  (DISPLAY J)
	  (DISPLAY (SQRT J))
	  (CONTINUE))

But I like it anyway.

Note that a "real" continuation can, if desired, be used as the
second argument to CALL-WITH-CONTINUATION, n'est-ce pas?

--Guy