Third phase of tutorial rewrite.

[lilypond.git] / scm / lily-library.scm

diff --git a/scm/lily-library.scm b/scm/lily-library.scm
index 70faac6a82b97e462f79a531f33e281f38cbd2b6..0746876ca3d6625d9c678c857618fe38f8ebf00a 100644 (file)
--- a/scm/lily-library.scm
+++ b/scm/lily-library.scm
@@ -380,6 +380,9 @@ found."
 
 (define-public interval-end cdr)
 
+(define-public (interval-bound interval dir)
+  ((if (= dir RIGHT) cdr car) interval))
+
 (define-public (interval-index interval dir)
   "Interpolate INTERVAL between between left (DIR=-1) and right (DIR=+1)"