RE: Prefix

["Chris Dutchyn" <address@hidden>]

These discussions on operators bring to light the issue of clarity:

The first expression:

	((a + b + c + d + e + f - g ) * 4) / 3

might be written in Scheme as:

	(/ (* (- (+ a b c d e f)
      	   g)
	      4)
	   3))

Notice how the "-" disappeared into the parallel list of "+"s!
PaulP seems to have missed it:

	(4 * (a + b + c + d + e + f)) / 3

whereas Scheme made it clear that a...f are involved in a *single*
(variadic) addition operation, but g is obviously handled differently.

Chris D.
cdutchyn@cs.ubc.ca