X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=flower%2Finclude%2Fdirection.hh;h=de13ef4ca8a6341ea7ce843f22fdc76e00f982bb;hb=4b448c212466623191bc1781da092c7c8ddb6c53;hp=befd0aa2ac207e4f2a18208a45bbf0ddb611047b;hpb=17d3559fc93cd3b2cc2afbc240abbe11874373c6;p=lilypond.git

diff --git a/flower/include/direction.hh b/flower/include/direction.hh
index befd0aa2ac..de13ef4ca8 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
@@ -23,53 +23,45 @@
 #include "axis.hh"
 
 enum Direction
-  {
-    UP = 1,
-    DOWN=-1,
-    LEFT=-1,
-    RIGHT = 1,
-    MIN=-1,
-    MAX = 1,
-    CENTER = 0,
-    SMALLER=-1,
-    BIGGER = 1,
-    START = -1,
-    STOP = 1,
-
-    /*
-      This is necessary to safely write loops,
-      since
-
-      dir <= RIGHT
-
-      is otherwise transformed into true unconditionally.
-    */
-    DIRECTION_LIMIT = 2,
-    DIRECTION_NEG_LIMIT = -2,
-  };
-
-inline Direction
-other_dir (Direction const d)
 {
-  return (Direction) (-d);
-}
+  UP = 1,
+  DOWN = -1,
+  LEFT = -1,
+  RIGHT = 1,
+  MIN = -1,
+  MAX = 1,
+  CENTER = 0,
+  SMALLER = -1,
+  BIGGER = 1,
+  START = -1,
+  STOP = 1,
+
+  /*
+    This is necessary to safely write loops,
+    since
+
+    dir <= RIGHT
+
+    is otherwise transformed into true unconditionally.
+  */
+  DIRECTION_LIMIT = 2,
+  DIRECTION_NEG_LIMIT = -2,
+};
 
 inline Direction
-operator - (Direction const d)
+operator - (Direction d)
 {
-  return other_dir (d);
+  return Direction (- static_cast<int> (d)); // cast avoids recursion
 }
 
-// huh?
-inline Direction
-flip (Direction *i)
-{
-  if (*i == (Direction)1)
-    *i = (Direction) - 1;
-  else if (*i == (Direction) - 1)
-    *i = (Direction)1;
-  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
@@ -83,6 +75,4 @@ template<class T> T minmax (Direction d, T a, T b)
     return min (a, b);
 }
 
-// String direction_string (Direction, Axis);
-
 #endif // DIRECTION_HH