Deriving Eq for OverlapFlag again

Mon Aug  7 11:15:21 EDT 2006  Manuel M T Chakravarty <chak@cse.unsw.edu.au>
  * Deriving Eq for OverlapFlag again

diff --git a/compiler/basicTypes/BasicTypes.lhs b/compiler/basicTypes/BasicTypes.lhs
index ab6d463..0dbd0f6 100644 (file)
--- a/compiler/basicTypes/BasicTypes.lhs
+++ b/compiler/basicTypes/BasicTypes.lhs
@@ -295,6 +295,7 @@ data OverlapFlag
                -- Without the Incoherent flag, we'd complain that
                -- instantiating 'b' would change which instance 
                -- was chosen
+  deriving( Eq )
 
 instance Outputable OverlapFlag where
    ppr NoOverlap  = empty