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-rw-r--r--src/direction_type.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/direction_type.h b/src/direction_type.h
index e0c0d6873..4ab1b705d 100644
--- a/src/direction_type.h
+++ b/src/direction_type.h
@@ -118,9 +118,10 @@ DECLARE_POSTFIX_INCREMENT(DiagDirDiff);
* align the north-east edge (and south-west) edge.
*/
enum Axis {
- AXIS_X = 0, ///< The X axis
- AXIS_Y = 1, ///< The y axis
- AXIS_END ///< Used for iterations
+ AXIS_X = 0, ///< The X axis
+ AXIS_Y = 1, ///< The y axis
+ AXIS_END, ///< Used for iterations
+ INVALID_AXIS = 0xFF, ///< Flag for an invalid Axis
};
#endif /* DIRECTION_TYPE_H */