Fix Hashable Eq constraint issue

composewell · Jun 24, 2023 · 0d6283b · 0d6283b
1 parent 8419705
commit 0d6283b
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/Streamly/Internal/Data/IsMap/HashMap.hs b/src/Streamly/Internal/Data/IsMap/HashMap.hs
@@ -20,7 +20,11 @@ import Streamly.Internal.Data.IsMap (IsMap(..))
 
 import qualified Data.HashMap.Strict as HashMap
 
-instance (Eq k, Hashable k) => IsMap (HashMap.HashMap k) where
+#if MIN_VERSION_base(4,16,0)
+instance (Hashable k) => IsMap (HashMap.HashMap k) where
+#else
+instance (Hashable k, Eq k) => IsMap (HashMap.HashMap k) where
+#endif
     type Key (HashMap.HashMap k) = k
 
     mapEmpty = HashMap.empty