Major bugfixing pass through the type checker

[ghc-hetmet.git] / compiler / typecheck / TcMType.lhs

diff --git a/compiler/typecheck/TcMType.lhs b/compiler/typecheck/TcMType.lhs
index dd91b06..b31a4cc 100644 (file)
--- a/compiler/typecheck/TcMType.lhs
+++ b/compiler/typecheck/TcMType.lhs
@@ -469,7 +469,7 @@ tcGetGlobalTyVars :: TcM TcTyVarSet
 tcGetGlobalTyVars
   = do { (TcLclEnv {tcl_tyvars = gtv_var}) <- getLclEnv
        ; gbl_tvs  <- readMutVar gtv_var
-       ; gbl_tvs' <- zonkTcTyVarsAndFV (varSetElems gbl_tvs)
+       ; gbl_tvs' <- zonkTcTyVarsAndFV gbl_tvs
        ; writeMutVar gtv_var gbl_tvs'
        ; return gbl_tvs' }
 \end{code}
@@ -480,8 +480,8 @@ tcGetGlobalTyVars
 zonkTcTyVars :: [TcTyVar] -> TcM [TcType]
 zonkTcTyVars tyvars = mapM zonkTcTyVar tyvars
 
-zonkTcTyVarsAndFV :: [TcTyVar] -> TcM TcTyVarSet
-zonkTcTyVarsAndFV tyvars = tyVarsOfTypes <$> mapM zonkTcTyVar tyvars
+zonkTcTyVarsAndFV :: TcTyVarSet -> TcM TcTyVarSet
+zonkTcTyVarsAndFV tyvars = tyVarsOfTypes <$> mapM zonkTcTyVar (varSetElems tyvars)
 
 -----------------  Types
 
@@ -497,12 +497,12 @@ zonkTcTypeCarefully ty
       | otherwise
       = ASSERT( isTcTyVar tv )
        case tcTyVarDetails tv of
-         SkolemTv {}  -> return (TyVarTy tv)
+         SkolemTv {}    -> return (TyVarTy tv)
          FlatSkol ty  -> zonkType (zonk_tv env_tvs) ty
-         MetaTv _ ref -> do { cts <- readMutVar ref
-                            ; case cts of    
-                                Flexi       -> return (TyVarTy tv)
-                                Indirect ty -> zonkType (zonk_tv env_tvs) ty }
+         MetaTv _ ref   -> do { cts <- readMutVar ref
+                              ; case cts of    
+                                  Flexi       -> return (TyVarTy tv)
+                                  Indirect ty -> zonkType (zonk_tv env_tvs) ty }
 
 zonkTcType :: TcType -> TcM TcType
 -- Simply look through all Flexis
@@ -513,12 +513,12 @@ zonkTcTyVar :: TcTyVar -> TcM TcType
 zonkTcTyVar tv
   = ASSERT2( isTcTyVar tv, ppr tv )
     case tcTyVarDetails tv of
-      SkolemTv {}  -> return (TyVarTy tv)
+      SkolemTv {}    -> return (TyVarTy tv)
       FlatSkol ty  -> zonkTcType ty
-      MetaTv _ ref -> do { cts <- readMutVar ref
-                        ; case cts of    
-                            Flexi       -> return (TyVarTy tv)
-                            Indirect ty -> zonkTcType ty }
+      MetaTv _ ref   -> do { cts <- readMutVar ref
+                          ; case cts of    
+                              Flexi       -> return (TyVarTy tv)
+                              Indirect ty -> zonkTcType ty }
 
 zonkTcTypeAndSubst :: TvSubst -> TcType -> TcM TcType
 -- Zonk, and simultaneously apply a non-necessarily-idempotent substitution
@@ -526,12 +526,12 @@ zonkTcTypeAndSubst subst ty = zonkType zonk_tv ty
   where
     zonk_tv tv 
       = case tcTyVarDetails tv of
-         SkolemTv {}  -> return (TyVarTy tv)
-         FlatSkol ty  -> zonkType zonk_tv ty
-         MetaTv _ ref -> do { cts <- readMutVar ref
-                            ; case cts of    
-                                Flexi       -> zonk_flexi tv
-                                Indirect ty -> zonkType zonk_tv ty }
+         SkolemTv {}    -> return (TyVarTy tv)
+         FlatSkol ty    -> zonkType zonk_tv ty
+         MetaTv _ ref   -> do { cts <- readMutVar ref
+                              ; case cts of    
+                                  Flexi       -> zonk_flexi tv
+                                  Indirect ty -> zonkType zonk_tv ty }
     zonk_flexi tv
       = case lookupTyVar subst tv of
           Just ty -> zonkType zonk_tv ty
@@ -601,12 +601,12 @@ zonkQuantifiedTyVar tv
 
 \begin{code}
 zonkImplication :: Implication -> TcM Implication
-zonkImplication implic@(Implic { ic_env_tvs = env_tvs, ic_given = given 
+zonkImplication implic@(Implic { ic_untch = env_tvs, ic_given = given 
                                , ic_wanted = wanted })
-  = do { env_tvs' <- zonkTcTyVarsAndFV (varSetElems env_tvs)
+  = do { env_tvs' <- zonkTcTyVarsAndFV env_tvs
        ; given'   <- mapM zonkEvVar given
        ; wanted'  <- mapBagM zonkWanted wanted
-       ; return (implic { ic_env_tvs = env_tvs', ic_given = given'
+       ; return (implic { ic_untch = env_tvs', ic_given = given'
                         , ic_wanted = wanted' }) }
 
 zonkEvVar :: EvVar -> TcM EvVar
@@ -750,12 +750,12 @@ mkZonkTcTyVar :: (TcTyVar -> TcM Type)    -- What to do for an unbound mutable var
 mkZonkTcTyVar unbound_var_fn tyvar 
   = ASSERT( isTcTyVar tyvar )
     case tcTyVarDetails tyvar of
-      SkolemTv {}  -> return (TyVarTy tyvar)
-      FlatSkol ty  -> zonkType (mkZonkTcTyVar unbound_var_fn) ty
-      MetaTv _ ref -> do { cts <- readMutVar ref
-                        ; case cts of    
-                            Flexi       -> unbound_var_fn tyvar  
-                            Indirect ty -> zonkType (mkZonkTcTyVar unbound_var_fn) ty }
+      SkolemTv {}    -> return (TyVarTy tyvar)
+      FlatSkol ty    -> zonkType (mkZonkTcTyVar unbound_var_fn) ty
+      MetaTv _ ref   -> do { cts <- readMutVar ref
+                          ; case cts of    
+                              Flexi       -> unbound_var_fn tyvar  
+                              Indirect ty -> zonkType (mkZonkTcTyVar unbound_var_fn) ty }
 
 -- Zonk the kind of a non-TC tyvar in case it is a coercion variable 
 -- (their kind contains types).