X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fc%2B%2B.scm;h=a455afdd78a4cf69116dd7809bc2f227cf9b0bd1;hb=HEAD;hp=ba38d5a05738e1b42cd4b94d64f860d91c17fbf1;hpb=ec074a41f03cf4cd3b914daa1359dd6e0fb2012d;p=lilypond.git

diff --git a/scm/c++.scm b/scm/c++.scm
index ba38d5a057..a455afdd78 100644
--- a/scm/c++.scm
+++ b/scm/c++.scm
@@ -54,9 +54,28 @@
   (and (pair? x)
        (ly:moment? (car x)) (ly:moment? (cdr x))))
 
+(define-public (boolean-or-number? x)
+  (or (boolean? x) (number? x)))
+
 (define-public (boolean-or-symbol? x)
   (or (boolean? x) (symbol? x)))
 
+(define-public (key? x)
+  (or (symbol? x) (index? x)))
+
+(define-public (key-list? x)
+  (and (list? x) (every key? x)))
+
+(define-public (key-list-or-music? x)
+  (if (list? x)
+      (every key? x)
+      (ly:music? x)))
+
+(define-public (key-list-or-symbol? x)
+  (if (list? x)
+      (every key? x)
+      (symbol? x)))
+
 (define-public (symbol-list? x)
   (and (list? x) (every symbol? x)))