2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
41 This is necessary to safely write loops,
46 is otherwise transformed into true unconditionally.
49 DIRECTION_NEG_LIMIT = -2,
53 operator - (Direction d)
55 return Direction (- static_cast<int> (d)); // cast avoids recursion
58 #define UP_and_DOWN(d) \
59 Direction d = UP; d != CENTER; d = (d == UP ? DOWN : CENTER)
61 #define DOWN_and_UP(d) \
62 Direction d = DOWN; d != CENTER; d = (d == DOWN ? UP : CENTER)
64 #define LEFT_and_RIGHT(d) \
65 Direction d = LEFT; d != CENTER; d = (d == LEFT ? RIGHT : CENTER)
68 if d > 0: the max operator
69 if d < 0: the min operator
71 template<class T> T minmax (Direction d, T a, T b)
79 #endif // DIRECTION_HH