;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; Copyright (C) 1998--2012 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; Copyright (C) 1998--2014 Jan Nieuwenhuizen <janneke@gnu.org>
;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
;;;;
;;;; LilyPond is free software: you can redistribute it and/or modify
(and (pair? x)
(number? (car x)) (number? (cdr x))))
+(define-public (number-pair-list? x)
+ (and (list? x)
+ (every number-pair? x)))
+
(define-public (fraction? x)
(and (pair? x)
(index? (car x)) (index? (cdr x))))
+(define-public (rational-or-procedure? x)
+ (or
+ (and (rational? x) (exact? x))
+ (procedure? x)))
+
(define-public (number-or-grob? x)
(or (ly:grob? x) (number? x)))