comment on pure handling.

diff --git a/lily/axis-group-interface.cc b/lily/axis-group-interface.cc
index 9fbfdf3193f29fb1c3329b880ddb55296cc4eabc..7c09658c8ce273b99055c111be7745fd559ecd9d 100644 (file)
--- a/lily/axis-group-interface.cc
+++ b/lily/axis-group-interface.cc
@@ -68,6 +68,14 @@ Axis_group_interface::relative_group_extent (vector<Grob*> const &elts,
   return r;
 }
 
+
+/*
+  FIXME: pure extent handling has a lot of ad-hoc caching.
+  This should be done with grob property callbacks.
+
+  --hwn
+*/
+
 Interval
 Axis_group_interface::cached_pure_height (Grob *me,
                                          vector<Grob*> const &elts,