X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Finstrument-switch-engraver.cc;h=67a58c7e6fca4ebec53bc57ec8f61b409fa12769;hb=47db9a3883d726ca53e2133a3b2298f78dd6a32e;hp=717d06d6776ba2119febe790733692d3011b4659;hpb=bc95f4434f760d41191341ab4508b2064eb19025;p=lilypond.git

diff --git a/lily/instrument-switch-engraver.cc b/lily/instrument-switch-engraver.cc
index 717d06d677..67a58c7e6f 100644
--- a/lily/instrument-switch-engraver.cc
+++ b/lily/instrument-switch-engraver.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 2006--2010 Han-Wen Nienhuys <hanwen@lilypond.org>
+  Copyright (C) 2006--2015 Han-Wen Nienhuys <hanwen@lilypond.org>
 
 
   LilyPond is free software: you can redistribute it and/or modify
@@ -21,8 +21,8 @@
 #include "engraver.hh"
 #include "item.hh"
 #include "text-interface.hh"
-#include "translator.icc"
 
+#include "translator.icc"
 
 class Instrument_switch_engraver : public Engraver
 {
@@ -34,8 +34,15 @@ protected:
 
   void stop_translation_time_step ();
   void process_music ();
+
+  virtual void derived_mark () const;
 };
 
+void
+Instrument_switch_engraver::derived_mark () const
+{
+  scm_gc_mark (cue_name_);
+}
 
 Instrument_switch_engraver::Instrument_switch_engraver ()
 {
@@ -50,7 +57,7 @@ void
 Instrument_switch_engraver::process_music ()
 {
   SCM cue_text = get_property ("instrumentCueName");
-  
+
   if (!scm_is_eq (cue_name_, cue_text))
     {
       if (Text_interface::is_markup (cue_text))
@@ -69,15 +76,15 @@ Instrument_switch_engraver::stop_translation_time_step ()
 }
 
 ADD_TRANSLATOR (Instrument_switch_engraver,
-		/* doc */
-		"Create a cue text for taking instrument.",
-			
-		/* create */
-		"InstrumentSwitch ",
-
-		/* read */
-		"instrumentCueName ",
-			
-		/* write */
-		""
-		);
+                /* doc */
+                "Create a cue text for taking instrument.",
+
+                /* create */
+                "InstrumentSwitch ",
+
+                /* read */
+                "instrumentCueName ",
+
+                /* write */
+                ""
+               );