Add PolyKinds to Data.GADT.Compare.TH

This allows deriveGCompare to generate instances of GCompare for types of kind (k -> *) rather than just (* -> *)
mokus0 · Jul 13, 2015 · d7ef367 · d7ef367
1 parent 2ceb726
commit d7ef367
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/Data/GADT/Compare/TH.hs b/src/Data/GADT/Compare/TH.hs
@@ -3,6 +3,9 @@
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE TypeOperators #-}
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ >= 708
+{-# LANGUAGE PolyKinds #-}
+#endif
 module Data.GADT.Compare.TH
     ( DeriveGEQ(..)
     , DeriveGCompare(..)