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

[lilypond.git] / lily / include / music-output.hh

diff --git a/lily/include/music-output.hh b/lily/include/music-output.hh
index 37437fbcac98f6f627f9b156cb15038a1a667448..3d1d25728a4a4a08e329069da647ba95651ed7ff 100644 (file)
--- a/lily/include/music-output.hh
+++ b/lily/include/music-output.hh
@@ -30,7 +30,7 @@ class Music_output : public Smob<Music_output>
 {
 public:
   int print_smob (SCM, scm_print_state *);
-  SCM mark_smob ();
+  SCM mark_smob () const;
   static const char type_p_name_[];
   virtual ~Music_output ();
 private: