1 files changed, 27 insertions, 4 deletions
diff --git a/src/model/Position.hpp b/src/model/Position.hpp
index a88c151..c8fc477 100644
--- a/src/model/Position.hpp
+++ b/src/model/Position.hpp
@@ -28,6 +28,8 @@
 
 #include "Direction.hpp"
 
+#include <functional>
+
 
 namespace RPGEdit {
 
@@ -41,19 +43,19 @@ struct Position {
 		Position p = *this;
 
 		switch (dir) {
-		case NORTH:
+		case Direction::NORTH:
 			p.y -= amount;
 			break;
 
-		case EAST:
+		case Direction::EAST:
 			p.x += amount;
 			break;
 
-		case SOUTH:
+		case Direction::SOUTH:
 			p.y += amount;
 			break;
 
-		case WEST:
+		case Direction::WEST:
 			p.x -= amount;
 		}
 
@@ -64,6 +66,10 @@ struct Position {
 		return translate(dir, 1);
 	}
 
+	bool operator==(const Position<T> &p) const {
+		return (x == p.x) && (y == p.y);
+	}
+
 	template<typename T2>
 	explicit operator Position<T2>() const {
 		return Position<T2>{T2(x), T2(y)};
@@ -73,3 +79,20 @@ struct Position {
 }
 
 }
+
+namespace std {
+template<typename T> struct hash<RPGEdit::Model::Position<T>> {
+	typedef size_t result_type;
+	typedef RPGEdit::Model::Position<T> argument_type;
+
+	size_t operator()(const RPGEdit::Model::Position<T> &pos) const noexcept {
+		const int shift = 4*sizeof(size_t); // half the bit count of size_t
+
+		std::hash<T> hash;
+		size_t hash1 = hash(pos.x), hash2 = hash(pos.y);
+
+		return hash1 ^ ((hash2 << shift) | (hash2 >> shift));
+	}
+};
+
+}