X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FbasicTypes%2FVar.lhs;h=2f4edd300f7494ed420c044e3e3e8067ec716f27;hp=351082859297d5bba8a6629182eb476c15464e15;hb=7fc749a43b4b6b85d234fa95d4928648259584f4;hpb=49c98d143c382a1341e1046f5ca00819a25691ba

diff --git a/compiler/basicTypes/Var.lhs b/compiler/basicTypes/Var.lhs
index 3510828..2f4edd3 100644
--- a/compiler/basicTypes/Var.lhs
+++ b/compiler/basicTypes/Var.lhs
@@ -5,9 +5,16 @@
 \section{@Vars@: Variables}
 
 \begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
 module Var (
 	Var, 
-	varName, varUnique, 
+	varName, varUnique, varType,
 	setVarName, setVarUnique, 
 
 	-- TyVars
@@ -40,6 +47,10 @@ import {-# SOURCE #-}	TypeRep( Type, Kind )
 import {-# SOURCE #-}	TcType( TcTyVarDetails, pprTcTyVarDetails )
 import {-# SOURCE #-}	IdInfo( GlobalIdDetails, notGlobalId, 
                                 IdInfo, seqIdInfo )
+#ifdef DEBUG
+import {-# SOURCE #-}	TypeRep( isCoercionKind )
+#endif
+
 import Name hiding (varName)
 import Unique
 import FastTypes
@@ -67,7 +78,7 @@ data Var
 	realUnique :: FastInt,		-- Key for fast comparison
 					-- Identical to the Unique in the name,
 					-- cached here for speed
-	tyVarKind :: Kind,
+	varType       :: Kind,
         isCoercionVar :: Bool
  }
 
@@ -76,23 +87,23 @@ data Var
 					-- inference, as well
 	varName        :: !Name,
 	realUnique     :: FastInt,
-	tyVarKind      :: Kind,
+	varType        :: Kind,
 	tcTyVarDetails :: TcTyVarDetails }
 
   | GlobalId { 			-- Used for imported Ids, dict selectors etc
  				-- See Note [GlobalId/LocalId] below
 	varName    :: !Name,	-- Always an External or WiredIn Name
 	realUnique :: FastInt,
-   	idType     :: Type,
-	idInfo     :: IdInfo,
+   	varType    :: Type,
+	idInfo_    :: IdInfo,
 	gblDetails :: GlobalIdDetails }
 
   | LocalId { 			-- Used for locally-defined Ids 
 				-- See Note [GlobalId/LocalId] below
 	varName    :: !Name,
 	realUnique :: FastInt,
-   	idType     :: Type,
-	idInfo     :: IdInfo,
+   	varType    :: Type,
+	idInfo_    :: IdInfo,
 	lclDetails :: LocalIdDetails }
 
 data LocalIdDetails 
@@ -177,40 +188,33 @@ setVarName var new_name
 type TyVar = Var
 
 tyVarName = varName
+tyVarKind = varType
 
 setTyVarUnique = setVarUnique
 setTyVarName   = setVarName
 
 setTyVarKind :: TyVar -> Kind -> TyVar
-setTyVarKind tv k = tv {tyVarKind = k}
+setTyVarKind tv k = tv {varType = k}
 \end{code}
 
 \begin{code}
 mkTyVar :: Name -> Kind -> TyVar
-mkTyVar name kind = TyVar { varName    = name
+mkTyVar name kind = ASSERT( not (isCoercionKind kind ) )
+		    TyVar { varName    = name
 			  , realUnique = getKey# (nameUnique name)
-			  , tyVarKind  = kind
+			  , varType  = kind
                           , isCoercionVar    = False
 			}
 
 mkTcTyVar :: Name -> Kind -> TcTyVarDetails -> TyVar
 mkTcTyVar name kind details
-  = TcTyVar {	varName    = name,
+  = -- TOM: no longer valid assertion? 
+    -- ASSERT( not (isCoercionKind kind) )
+    TcTyVar {	varName    = name,
 		realUnique = getKey# (nameUnique name),
-		tyVarKind  = kind,
+		varType  = kind,
 		tcTyVarDetails = details
 	}
-
-mkWildCoVar :: Kind -> TyVar
--- A type variable that is never referred to,
--- so its unique doesn't matter
-mkWildCoVar kind 
-  = TyVar { varName = mkSysTvName wild_uniq FSLIT("co_wild"),
-            realUnique = _ILIT(1),
-            tyVarKind = kind,
-            isCoercionVar = True }
-  where
-    wild_uniq = mkBuiltinUnique 1
 \end{code}
 
 %************************************************************************
@@ -228,12 +232,24 @@ setCoVarUnique = setVarUnique
 setCoVarName   = setVarName
 
 mkCoVar :: Name -> Kind -> CoVar
-mkCoVar name kind = TyVar { varName    = name
+mkCoVar name kind = ASSERT( isCoercionKind kind )
+		    TyVar { varName    = name
 			  , realUnique = getKey# (nameUnique name)
-			  , tyVarKind  = kind
+			  , varType  = kind
                           , isCoercionVar    = True
 			}
 
+mkWildCoVar :: Kind -> TyVar
+-- A type variable that is never referred to,
+-- so its unique doesn't matter
+mkWildCoVar kind 
+  = ASSERT( isCoercionKind kind )
+    TyVar { varName = mkSysTvName wild_uniq FSLIT("co_wild"),
+            realUnique = _ILIT(1),
+            varType = kind,
+            isCoercionVar = True }
+  where
+    wild_uniq = mkBuiltinUnique 1
 \end{code}
 
 %************************************************************************
@@ -252,6 +268,7 @@ type DictId = Id
 \begin{code}
 idName    = varName
 idUnique  = varUnique
+idType    = varType
 
 setIdUnique :: Id -> Unique -> Id
 setIdUnique = setVarUnique
@@ -260,7 +277,7 @@ setIdName :: Id -> Name -> Id
 setIdName = setVarName
 
 setIdType :: Id -> Type -> Id
-setIdType id ty = id {idType = ty}
+setIdType id ty = id {varType = ty}
 
 setIdExported :: Id -> Id
 -- Can be called on GlobalIds, such as data cons and class ops,
@@ -276,26 +293,31 @@ globaliseId :: GlobalIdDetails -> Id -> Id
 -- If it's a local, make it global
 globaliseId details id = GlobalId { varName    = varName id,
 				    realUnique = realUnique id,
-			   	    idType     = idType id,
-				    idInfo     = idInfo id,
+			   	    varType    = varType id,
+				    idInfo_    = idInfo id,
 				    gblDetails = details }
 
+idInfo :: Id -> IdInfo
+idInfo (GlobalId {idInfo_ = info}) = info
+idInfo (LocalId  {idInfo_ = info}) = info
+idInfo other_var		   = pprPanic "idInfo" (ppr other_var)
+
 lazySetIdInfo :: Id -> IdInfo -> Id
-lazySetIdInfo id info = id {idInfo = info}
+lazySetIdInfo id info = id {idInfo_ = info}
 
 setIdInfo :: Id -> IdInfo -> Id
-setIdInfo id info = seqIdInfo info `seq` id {idInfo = info}
+setIdInfo id info = seqIdInfo info `seq` id {idInfo_ = info}
 	-- Try to avoid spack leaks by seq'ing
 
 modifyIdInfo :: (IdInfo -> IdInfo) -> Id -> Id
 modifyIdInfo fn id
-  = seqIdInfo new_info `seq` id {idInfo = new_info}
+  = seqIdInfo new_info `seq` id {idInfo_ = new_info}
   where
     new_info = fn (idInfo id)
 
 -- maybeModifyIdInfo tries to avoid unnecesary thrashing
 maybeModifyIdInfo :: Maybe IdInfo -> Id -> Id
-maybeModifyIdInfo (Just new_info) id = id {idInfo = new_info}
+maybeModifyIdInfo (Just new_info) id = id {idInfo_ = new_info}
 maybeModifyIdInfo Nothing	  id = id
 \end{code}
 
@@ -310,17 +332,17 @@ mkGlobalId :: GlobalIdDetails -> Name -> Type -> IdInfo -> Id
 mkGlobalId details name ty info 
   = GlobalId {	varName    = name, 
 		realUnique = getKey# (nameUnique name), 	-- Cache the unique
-		idType     = ty,	
+		varType     = ty,	
 		gblDetails = details,
-		idInfo     = info }
+		idInfo_    = info }
 
 mk_local_id :: Name -> Type -> LocalIdDetails -> IdInfo -> Id
 mk_local_id name ty details info
   = LocalId {	varName    = name, 
 		realUnique = getKey# (nameUnique name), 	-- Cache the unique
-		idType     = ty,	
+		varType     = ty,	
 		lclDetails = details,
-		idInfo     = info }
+		idInfo_    = info }
 
 mkLocalId :: Name -> Type -> IdInfo -> Id
 mkLocalId name ty info = mk_local_id name ty NotExported info