; Copyright (c) 1993, 1994 Richard Kelsey and Jonathan Rees. See file COPYING. (define g-methods (make-method-table 'g)) (define g (make-generic g-methods)) (define foo-family (make-family 'foo 1)) (define-method g-methods foo-family (lambda (x) (if (even? x) 'win (fail)))) (define bar-family (make-family 'bar 2)) ;More specific (define-method g-methods bar-family (lambda (x) (case x ((1 3 5) 'ok) (else (fail))))) (define-method g-methods (make-family 'baz 2) ;Same priority as bar-family (lambda (x) (case x ((3) 'great) (else (fail))))) ; (g 0) => 'win ; (g 1) => 'ok ; (g 3) => 'great ; (g 9) => error