X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=flower%2Finclude%2Fdirection.hh;h=f3b31e3811a7c5245c294cbd72322b9dc3cd184d;hb=47db9a3883d726ca53e2133a3b2298f78dd6a32e;hp=6fe5efcc19c8f446ebd16e63584dd146f056c8da;hpb=f93e4199873c91ae32f0e84a610d14853dc379df;p=lilypond.git

diff --git a/flower/include/direction.hh b/flower/include/direction.hh
index 6fe5efcc19..f3b31e3811 100644
--- a/flower/include/direction.hh
+++ b/flower/include/direction.hh
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2011 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
@@ -60,7 +60,7 @@ operator - (Direction const d)
   return other_dir (d);
 }
 
-// huh?
+// to be deleted soon (after coping with issues 2491 and 2493
 inline Direction
 flip (Direction *i)
 {
@@ -71,6 +71,15 @@ flip (Direction *i)
   return *i;
 }
 
+#define UP_and_DOWN(d) \
+  Direction d = UP; d != CENTER; d = (d == UP ? DOWN : CENTER)
+
+#define DOWN_and_UP(d) \
+  Direction d = DOWN; d != CENTER; d = (d == DOWN ? UP : CENTER)
+
+#define LEFT_and_RIGHT(d) \
+  Direction d = LEFT; d != CENTER; d = (d == LEFT ? RIGHT : CENTER)
+
 /**
    if d > 0: the max operator
    if d < 0: the min operator