2 files changed, 5 insertions, 0 deletions
diff --git a/backend/Location.cpp b/backend/Location.cpp
index c036c7b..eadbef2 100644
--- a/backend/Location.cpp
+++ b/backend/Location.cpp
@@ -5,6 +5,10 @@
 #include "Object.h"
 #include "util.h"
 
+Direction operator - (const Direction & rhs) {
+	return static_cast<Direction>((rhs + 2) % 4);
+}
+
 Direction random_direction() {
 	return DIRECTIONS[RNG::get().rand_int(4)];
 }
diff --git a/backend/Location.h b/backend/Location.h
index d29c117..6f701ad 100644
--- a/backend/Location.h
+++ b/backend/Location.h
@@ -15,6 +15,7 @@ enum Direction {
 	WEST = 3,
 };
 static constexpr const Direction DIRECTIONS[] = { NORTH, EAST, SOUTH, WEST };
+Direction operator - (const Direction &);
 
 Direction random_direction();
 Direction random_direction(const Location &);