1 files changed, 22 insertions, 0 deletions
diff --git a/compiler/utils/Binary.hs b/compiler/utils/Binary.hs
index 80d10cba66..4f48a424b3 100644
--- a/compiler/utils/Binary.hs
+++ b/compiler/utils/Binary.hs
@@ -75,6 +75,7 @@ import Data.Int
 import Data.Word
 import Data.IORef
 import Data.Char                ( ord, chr )
+import Data.Typeable
 import Control.Monad            ( when )
 import System.IO as IO
 import System.IO.Unsafe         ( unsafeInterleaveIO )
@@ -565,6 +566,27 @@ instance Binary (Bin a) where
   get bh = do i <- get bh; return (BinPtr i)
 
 -- -----------------------------------------------------------------------------
+-- Instances for Data.Typeable stuff
+
+instance Binary TyCon where
+    put_ bh ty_con = do
+        let s = tyConString ty_con
+        put_ bh s
+    get bh = do
+        s <- get bh
+        return (mkTyCon s)
+
+instance Binary TypeRep where
+    put_ bh type_rep = do
+        let (ty_con, child_type_reps) = splitTyConApp type_rep
+        put_ bh ty_con
+        put_ bh child_type_reps
+    get bh = do
+        ty_con <- get bh
+        child_type_reps <- get bh
+        return (mkTyConApp ty_con child_type_reps)
+
+-- -----------------------------------------------------------------------------
 -- Lazy reading/writing
 
 lazyPut :: Binary a => BinHandle -> a -> IO ()