Author: Richard C. Waters
X3J13 voted in January 1989
to adopt a facility for user-controlled pretty
printing as a part of the forthcoming draft Common Lisp standard. This facility is
the culmination of thirteen years of design, testing, revision, and use of this
This chapter presents the bulk of the Common Lisp pretty printing
speciﬁcation, written by Richard C. Waters. I have edited it only very lightly to
conform to the overall style of this book.
—Guy L. Steele Jr.