From 832fcf965e4b64aa55ae5dbbf6b0d78e0f686dac Mon Sep 17 00:00:00 2001
From: Dan Eble <nine.fierce.ballads@gmail.com>
Date: Sat, 11 Jul 2015 15:53:17 -0400
Subject: [PATCH] Issue 4503 (1/4) Clean up Tie::less and Semi_Tie::less

---
 lily/include/semi-tie.hh |  3 +--
 lily/include/tie.hh      |  3 +--
 lily/semi-tie.cc         | 12 +++++++++---
 lily/tie.cc              | 11 +++++++++--
 4 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/lily/include/semi-tie.hh b/lily/include/semi-tie.hh
index 6eb6472e71..8c52dc64d6 100644
--- a/lily/include/semi-tie.hh
+++ b/lily/include/semi-tie.hh
@@ -29,8 +29,7 @@ struct Semi_tie
 
   DECLARE_SCHEME_CALLBACK (calc_direction, (SCM));
   DECLARE_SCHEME_CALLBACK (calc_control_points, (SCM));
-  static bool less (Grob *const &s1,
-                    Grob *const &s2);
+  static bool less (Grob *s1, Grob *s2);
   static int get_column_rank (Item *);
   static int get_position (Item *);
   static Item *head (Item *);
diff --git a/lily/include/tie.hh b/lily/include/tie.hh
index 7b74d159c8..a6b3bf59a7 100644
--- a/lily/include/tie.hh
+++ b/lily/include/tie.hh
@@ -42,8 +42,7 @@ public:
   DECLARE_SCHEME_CALLBACK (set_spacing_rods, (SCM));
   DECLARE_SCHEME_CALLBACK (calc_direction, (SCM));
   DECLARE_SCHEME_CALLBACK (calc_control_points, (SCM));
-  static bool less (Grob *const &s1,
-                    Grob *const &s2);
+  static bool less (Grob *s1, Grob *s2);
 };
 
 #endif // TIE_HH
diff --git a/lily/semi-tie.cc b/lily/semi-tie.cc
index 1cc82c3b08..1930087514 100644
--- a/lily/semi-tie.cc
+++ b/lily/semi-tie.cc
@@ -84,10 +84,16 @@ Semi_tie::get_position (Item *me)
 }
 
 bool
-Semi_tie::less (Grob *const &s1,
-                Grob *const &s2)
+Semi_tie::less (Grob *g1, Grob *g2)
 {
-  return Tie::get_position_generic (s1) < Tie::get_position_generic (s2);
+  Item *i1 = dynamic_cast<Item *> (g1);
+  Item *i2 = dynamic_cast<Item *> (g2);
+  if (i1 && i2) {
+    return get_position (i1) < get_position (i2);
+  }
+
+  programming_error ("grob is not a semi-tie");
+  return false;
 }
 
 Item *
diff --git a/lily/tie.cc b/lily/tie.cc
index 47c5a1c9cf..72855687e3 100644
--- a/lily/tie.cc
+++ b/lily/tie.cc
@@ -42,9 +42,16 @@
 #include "semi-tie-column.hh"
 
 bool
-Tie::less (Grob *const &s1, Grob *const &s2)
+Tie::less (Grob *g1, Grob *g2)
 {
-  return get_position_generic (s1) < get_position_generic (s2);
+  Spanner *s1 = dynamic_cast<Spanner *> (g1);
+  Spanner *s2 = dynamic_cast<Spanner *> (g2);
+  if (s1 && s2) {
+    return get_position (s1) < get_position (s2);
+  }
+
+  programming_error ("grob is not a tie");
+  return false;
 }
 
 void
-- 
2.39.5