() ignored in some expressions

[Roger A. Cole]

In K&R1, expressions involving one of the associative and commutative
operators can be arranged even when parenthesized.

>From the first time I read this, I've had difficulty not throwing up in
instances where this applies.  I might be able to accept this *feature*
a little more peacefully if someone could explain the basis for it.

Is this feature also present in ANSI standard C?

--
Roger Cole   Los Alamos National Laboratory    Internet: cole at luke.lanl.gov