The complete source code is given below. You can just cut’n paste it in a REPL and it will (should) work. It is also contained in a file called demos/quickstart.lisp in the distribution (along with other demo programs). You can try it out with, e.g., ‘sbcl --script’ in a terminal.
(in-package :cl-user) (require "asdf") (asdf:load-system :net.didierverna.focus) (net.didierverna.focus:nickname-package) (defpackage :quotation (:use :cl) (:export :quotation)) (in-package :quotation) (defun quotation-formatter (stream argument colonp atsignp &rest arguments) (declare (ignore colonp atsignp arguments)) (write-char #\` stream) (write-string argument stream) (write-char #\' stream)) (let ((table (focus:make-format-table))) (focus:with-format-table table (focus:set-format-directive #\` :function 'quotation-formatter)) (defun quotation (who quotation) (focus:with-format-table table (focus:format t "As ~A would say: ~`.~%" who quotation)))) (in-package :cl-user) (quotation:quotation "Bugs Bunny" "Errr, what's up Doc?")