Create GOL.Space

GOL/Space.hs

@@ -0,0 +1,9 @@
+module GOL.Space where
+
+import Data.Functor.Rep
+
+class (Representable f, Rep f ~ s) => Space s f where
+  neighbors :: s -> [s]
+
+class (Space (Int, Int) f) => DisplayableSpace f where
+  size :: (Int, Int)

conways-game-of-life.cabal

@@ -7,7 +7,9 @@ build-type:     Simple
 cabal-version:  >= 1.8
 
 executable main
+  main-is:            Main.hs
   build-depends:      base,
                       comonad,
-                  Yampa
-  main-is:        Main.hs
+                      Yampa,
+                      adjunctions
+  default-extensions: MultiParamTypeClasses