put the port in the port directory

port/Data/IORef.newt

@@ -0,0 +1,27 @@
+module Data.IORef
+
+import Prelude
+
+-- We should test this at some point
+
+ptype IORef : U → U
+pfunc primNewIORef uses (MkIORes MkUnit) : ∀ a. a → IO (IORef a) := `(_, a) => (w) => MkIORes(undefined, [a], w)`
+pfunc primReadIORef uses (MkIORes MkUnit) : ∀ a. IORef a → IO a := `(_, ref) => (w) => MkIORes(undefined, ref[0], w)`
+pfunc primWriteIORef uses (MkIORes MkUnit) : ∀ a. IORef a → a → IO Unit := `(_, ref, a) => (w) => {
+  ref[0] = a
+  return MkIORes(undefined,MkUnit,w)
+}`
+
+newIORef : ∀ io a. {{HasIO io}} → a → io (IORef a)
+newIORef a = liftIO $ primNewIORef a
+
+readIORef : ∀ io a. {{HasIO io}} → IORef a → io a
+readIORef ref = liftIO $ primReadIORef ref
+
+writeIORef : ∀ io a. {{HasIO io}} → IORef a -> a -> io Unit
+writeIORef ref a = liftIO $ primWriteIORef ref a
+
+-- Idris HasIO constraints to monad, we don't have those constraints yet
+modifyIORef : ∀ io a. {{Monad io}} {{HasIO io}} → IORef a -> (a -> a) -> io Unit
+modifyIORef {io} ref f =
+  bind {io} (readIORef ref) $ \a => writeIORef ref (f a)