Issue: FUNCTION-COMPOSITION (Version 2)

[gls@Think.COM]

   Date: Wed, 5 Oct 88 14:00 EDT
   From: Kent M Pitman <KMP@stony-brook.scrc.symbolics.com>
   ...
   Issue:          FUNCTION-COMPOSITION
   References:     None
   Category:       ADDITION
   Edit history:   21-Jun-88, Version 1 by Pitman
		   05-Oct-88, Version 2 by Pitman
   Status:	        For Internal Discussion
   Related-Issues: TEST-NOT-IF-NOT
   ...
   Cost to Implementors:

     A straightforward implementation is simple to cook up. The definitions
     given here would suffice. Typically some additional work might be
     desirable to make these open code in interesting ways.

     (DEFUN COMPOSE (&REST FUNCTIONS)
       (COND ((NOT FUNCTIONS)
	      (ERROR "COMPOSE requires at least one function."))
	     ...

Sorry I didn't catch this earlier.  I believe that this should read

       (COND ((NULL FUNCTIONS) #'IDENTITY)
	     ...

(1) IDENTITY is the identity element for the COMPOSE operation.
    (Actually not quite, in the case where the rightmost function
    accepts more than one argument, but close enough.)
(2) NULL is more appropriate than NOT (this is a nit).

--Guy