X-Git-Url: https://git.stderr.nl/gitweb?a=blobdiff_plain;f=FlattenTypes.hs;h=e7d21d605c5fec8901e9ad104cb4f92f8f3c3849;hb=e73057cb92295256ab62810771da8e723f4a8223;hp=5c95632859d22fc30a8752a28661ad6083eaf224;hpb=72a84356f5507b73d4d5f84844aac9334ee17795;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

diff --git a/FlattenTypes.hs b/FlattenTypes.hs
index 5c95632..e7d21d6 100644
--- a/FlattenTypes.hs
+++ b/FlattenTypes.hs
@@ -1,6 +1,7 @@
 module FlattenTypes where
 
 import Data.Traversable
+import qualified Data.Foldable as Foldable
 import qualified Control.Monad.State as State
 
 import CoreSyn
@@ -28,6 +29,11 @@ data HsValueUse =
   }
   deriving (Show, Eq, Ord)
 
+-- | Is this HsValueUse a state use?
+isStateUse :: HsValueUse -> Bool
+isStateUse (State _) = True
+isStateUse _         = False
+
 -- | A map from a Haskell value to the use of each single value
 type HsUseMap = HsValueMap HsValueUse
 
@@ -60,6 +66,11 @@ data HsFunction = HsFunction {
   hsFuncRes  :: HsUseMap
 } deriving (Show, Eq, Ord)
 
+hasState :: HsFunction -> Bool
+hasState hsfunc = 
+  any (Foldable.any isStateUse) (hsFuncArgs hsfunc)
+  || Foldable.any isStateUse (hsFuncRes hsfunc)
+
 -- | A flattened function application
 data FApp sigid = FApp {
   appFunc :: HsFunction,