Move error-ids to MkCore (from PrelRules)

[ghc-hetmet.git] / compiler / deSugar / DsMonad.lhs

diff --git a/compiler/deSugar/DsMonad.lhs b/compiler/deSugar/DsMonad.lhs
index 145ba9e..5245eaa 100644 (file)
--- a/compiler/deSugar/DsMonad.lhs
+++ b/compiler/deSugar/DsMonad.lhs
@@ -9,12 +9,12 @@
 module DsMonad (
        DsM, mapM, mapAndUnzipM,
        initDs, initDsTc, fixDs,
-       foldlM, foldrM, ifOptM,
+       foldlM, foldrM, ifOptM, unsetOptM,
        Applicative(..),(<$>),
 
        newLocalName,
        duplicateLocalDs, newSysLocalDs, newSysLocalsDs, newUniqueId,
-       newFailLocalDs,
+       newFailLocalDs, newPredVarDs,
        getSrcSpanDs, putSrcSpanDs,
        getModuleDs,
        newUnique, 
@@ -25,6 +25,8 @@ module DsMonad (
 
        DsMetaEnv, DsMetaVal(..), dsLookupMetaEnv, dsExtendMetaEnv,
 
+        dsLoadModule,
+
        -- Warnings
        DsWarning, warnDs, failWithDs,
 
@@ -38,6 +40,7 @@ import TcRnMonad
 import CoreSyn
 import HsSyn
 import TcIface
+import LoadIface
 import RdrName
 import HscTypes
 import Bag
@@ -53,10 +56,8 @@ import Type
 import UniqSupply
 import Name
 import NameEnv
-import OccName
 import DynFlags
 import ErrUtils
-import MonadUtils
 import FastString
 
 import Data.IORef
@@ -220,16 +221,26 @@ it easier to read debugging output.
 
 \begin{code}
 -- Make a new Id with the same print name, but different type, and new unique
-newUniqueId :: Name -> Type -> DsM Id
-newUniqueId id = mkSysLocalM (occNameFS (nameOccName id))
+newUniqueId :: Id -> Type -> DsM Id
+newUniqueId id = mkSysLocalM (occNameFS (nameOccName (idName id)))
 
 duplicateLocalDs :: Id -> DsM Id
-duplicateLocalDs old_local = do
-    uniq <- newUnique
-    return (setIdUnique old_local uniq)
-
+duplicateLocalDs old_local 
+  = do { uniq <- newUnique
+       ; return (setIdUnique old_local uniq) }
+
+newPredVarDs :: PredType -> DsM Var
+newPredVarDs pred
+ | isEqPred pred
+ = do { uniq <- newUnique; 
+      ; let name = mkSystemName uniq (mkOccNameFS tcName (fsLit "co_pv"))
+           kind = mkPredTy pred
+      ; return (mkCoVar name kind) }
+ | otherwise
+ = newSysLocalDs (mkPredTy pred)
+ 
 newSysLocalDs, newFailLocalDs :: Type -> DsM Id
-newSysLocalDs = mkSysLocalM (fsLit "ds")
+newSysLocalDs  = mkSysLocalM (fsLit "ds")
 newFailLocalDs = mkSysLocalM (fsLit "fail")
 
 newSysLocalsDs :: [Type] -> DsM [Id]
@@ -310,3 +321,13 @@ dsExtendMetaEnv :: DsMetaEnv -> DsM a -> DsM a
 dsExtendMetaEnv menv thing_inside
   = updLclEnv (\env -> env { ds_meta = ds_meta env `plusNameEnv` menv }) thing_inside
 \end{code}
+
+\begin{code}
+dsLoadModule :: SDoc -> Module -> DsM ()
+dsLoadModule doc mod
+  = do { env <- getGblEnv
+       ; setEnvs (ds_if_env env)
+                 (loadSysInterface doc mod >> return ())
+       }
+\end{code}
+