Issue 4459/1: Mark mark_smob () member functions as const

[lilypond.git] / lily / include / font-metric.hh

diff --git a/lily/include/font-metric.hh b/lily/include/font-metric.hh
index b1016b65c6e923228df4a30078115b0dc2c3fa8f..f1917b0c4af402029b09af25ab00fdfb097eb26e 100644 (file)
--- a/lily/include/font-metric.hh
+++ b/lily/include/font-metric.hh
@@ -34,7 +34,7 @@ class Font_metric : public Smob<Font_metric>
 {
 public:
   int print_smob (SCM, scm_print_state *);
-  SCM mark_smob ();
+  SCM mark_smob () const;
   static const char type_p_name_[];
   virtual ~Font_metric ();
 private: