Doc: External.itely - Add lyluatex

[lilypond.git] / lily / staff-symbol-engraver.cc

diff --git a/lily/staff-symbol-engraver.cc b/lily/staff-symbol-engraver.cc
index 509f86184a280b53bd2e6ab96bf7e5571bc00942..cad91e76c3e958d318ff50305432b536549a41dc 100644 (file)
--- a/lily/staff-symbol-engraver.cc
+++ b/lily/staff-symbol-engraver.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -46,8 +46,19 @@ protected:
   DECLARE_TRANSLATOR_LISTENER (staff_span);
   virtual void finalize ();
   void process_music ();
+  virtual void derived_mark () const;
 };
 
+void
+Staff_symbol_engraver::derived_mark () const
+{
+  for (LEFT_and_RIGHT (d))
+    {
+      if (span_events_[d])
+        scm_gc_mark (span_events_[d]->self_scm ());
+    }
+}
+
 Staff_symbol_engraver::~Staff_symbol_engraver ()
 {
   if (span_)
@@ -99,7 +110,7 @@ Staff_symbol_engraver::start_spanner ()
     {
       span_ = make_spanner ("StaffSymbol", SCM_EOL);
       span_->set_bound (LEFT,
-                        unsmob_grob (get_property ("currentCommandColumn")));
+                        unsmob<Grob> (get_property ("currentCommandColumn")));
     }
 }
 
@@ -110,7 +121,7 @@ Staff_symbol_engraver::stop_spanner ()
     return;
 
   if (!finished_span_->get_bound (RIGHT))
-    finished_span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+    finished_span_->set_bound (RIGHT, unsmob<Grob> (get_property ("currentCommandColumn")));
 
   announce_end_grob (finished_span_,
                      span_events_[STOP]