Add symbol-list-or-music? predicate

[lilypond.git] / scm / c++.scm

diff --git a/scm/c++.scm b/scm/c++.scm
index d627481e5cba9e33243f3c14018e3655b8164ca2..12c38a397f0ac7d4b297c6c3c2dbb463cfc25124 100644 (file)
--- a/scm/c++.scm
+++ b/scm/c++.scm
@@ -51,6 +51,11 @@
 (define-public (symbol-list? x)
   (and (list? x) (every symbol? x)))
 
+(define-public (symbol-list-or-music? x)
+  (if (list? x)
+      (every symbol? x)
+      (ly:music? x)))
+
 (define-public (string-or-symbol? x)
   (or (string? x) (symbol? x)))