Strategy that starts building exhaustive game state tree

This falls over (and takes the host machine with it) because its
memory usage grows catastrophically.

The main use of time, reported by perf, was cloning the map vector.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/geometry/direction.rs b/src/geometry/direction.rs
index 84fe785..119aeee 100644
--- a/src/geometry/direction.rs
+++ b/src/geometry/direction.rs
@@ -53,4 +53,18 @@ impl Direction {
             NorthWest => Vec2d::new(-1, -1),
         }
     }
+
+    pub fn all() -> [Direction; 8] {
+        use Direction::*;
+        [
+            North,
+            NorthEast,
+            East,
+            SouthEast,
+            South,
+            SouthWest,
+            West,
+            NorthWest,
+        ]
+    }
 }