Split the Id related functions out from Var into Id, document Var and some of Id

[ghc-hetmet.git] / compiler / iface / IfaceType.lhs

diff --git a/compiler/iface/IfaceType.lhs b/compiler/iface/IfaceType.lhs
index 45fe37d..59fb3e9 100644 (file)
--- a/compiler/iface/IfaceType.lhs
+++ b/compiler/iface/IfaceType.lhs
@@ -23,10 +23,9 @@ module IfaceType (
 
     ) where
 
-#include "HsVersions.h"
-
 import TypeRep
 import TyCon
+import Id
 import Var
 import TysWiredIn
 import Name
@@ -50,8 +49,7 @@ type IfaceIdBndr  = (FastString, IfaceType)
 type IfaceTvBndr  = (FastString, IfaceKind)
 
 -------------------------------
-type IfaceKind = IfaceType                     -- Re-use the Kind type, but no KindVars in it
-
+type IfaceKind     = IfaceType
 type IfaceCoercion = IfaceType
 
 data IfaceType
@@ -139,13 +137,15 @@ The precedence levels are:
 \end{description}
 
 \begin{code}
-tOP_PREC    = (0 :: Int)  -- type   in ParseIface.y
-fUN_PREC    = (1 :: Int)  -- btype  in ParseIface.y
-tYCON_PREC  = (2 :: Int)  -- atype  in ParseIface.y
+tOP_PREC, fUN_PREC, tYCON_PREC :: Int
+tOP_PREC    = 0 -- type   in ParseIface.y
+fUN_PREC    = 1 -- btype  in ParseIface.y
+tYCON_PREC  = 2 -- atype  in ParseIface.y
 
 noParens :: SDoc -> SDoc
 noParens pp = pp
 
+maybeParen :: Int -> Int -> SDoc -> SDoc
 maybeParen ctxt_prec inner_prec pretty
   | ctxt_prec < inner_prec = pretty
   | otherwise             = parens pretty
@@ -162,6 +162,7 @@ instance Outputable IfaceBndr where
 pprIfaceBndrs :: [IfaceBndr] -> SDoc
 pprIfaceBndrs bs = sep (map ppr bs)
 
+pprIfaceIdBndr :: (FastString, IfaceType) -> SDoc
 pprIfaceIdBndr (name, ty) = hsep [ppr name, dcolon, ppr ty]
 
 pprIfaceTvBndr :: IfaceTvBndr -> SDoc
@@ -177,14 +178,7 @@ pprIfaceTvBndrs tyvars = hsep (map pprIfaceTvBndr tyvars)
 \begin{code}
 ---------------------------------
 instance Outputable IfaceType where
-  ppr ty = pprIfaceTypeForUser ty
-
-pprIfaceTypeForUser ::IfaceType -> SDoc
--- Drop top-level for-alls; if that's not what you want, use pprIfaceType dire
-pprIfaceTypeForUser ty
-  = pprIfaceForAllPart [] theta (pprIfaceType tau)
- where         
-    (_tvs, theta, tau) = splitIfaceSigmaTy ty
+  ppr ty = pprIfaceType ty
 
 pprIfaceType, pprParendIfaceType ::IfaceType -> SDoc
 pprIfaceType       = ppr_ty tOP_PREC
@@ -192,9 +186,9 @@ pprParendIfaceType = ppr_ty tYCON_PREC
 
 
 ppr_ty :: Int -> IfaceType -> SDoc
-ppr_ty ctxt_prec (IfaceTyVar tyvar)     = ppr tyvar
+ppr_ty _         (IfaceTyVar tyvar)     = ppr tyvar
 ppr_ty ctxt_prec (IfaceTyConApp tc tys) = ppr_tc_app ctxt_prec tc tys
-ppr_ty ctxt_prec (IfacePredTy st)       = ppr st
+ppr_ty _         (IfacePredTy st)       = ppr st
 
        -- Function types
 ppr_ty ctxt_prec (IfaceFunTy ty1 ty2)
@@ -222,13 +216,14 @@ pprIfaceForAllPart tvs ctxt doc
   = sep [ppr_tvs, pprIfaceContext ctxt, doc]
   where
     ppr_tvs | null tvs  = empty
-           | otherwise = ptext SLIT("forall") <+> pprIfaceTvBndrs tvs <> dot
+           | otherwise = ptext (sLit "forall") <+> pprIfaceTvBndrs tvs <> dot
 
 -------------------
-ppr_tc_app ctxt_prec tc         []   = ppr_tc tc
-ppr_tc_app ctxt_prec IfaceListTc [ty] = brackets   (pprIfaceType ty)
-ppr_tc_app ctxt_prec IfacePArrTc [ty] = pabrackets (pprIfaceType ty)
-ppr_tc_app ctxt_prec (IfaceTupTc bx arity) tys
+ppr_tc_app :: Int -> IfaceTyCon -> [IfaceType] -> SDoc
+ppr_tc_app _         tc         []   = ppr_tc tc
+ppr_tc_app _         IfaceListTc [ty] = brackets   (pprIfaceType ty)
+ppr_tc_app _         IfacePArrTc [ty] = pabrackets (pprIfaceType ty)
+ppr_tc_app _         (IfaceTupTc bx arity) tys
   | arity == length tys 
   = tupleParens bx (sep (punctuate comma (map pprIfaceType tys)))
 ppr_tc_app ctxt_prec tc tys 
@@ -243,7 +238,7 @@ ppr_tc tc              = ppr tc
 -------------------
 instance Outputable IfacePredType where
        -- Print without parens
-  ppr (IfaceEqPred ty1 ty2)= hsep [ppr ty1, ptext SLIT(":=:"), ppr ty2]
+  ppr (IfaceEqPred ty1 ty2)= hsep [ppr ty1, ptext (sLit ":=:"), ppr ty2]
   ppr (IfaceIParam ip ty)  = hsep [ppr ip, dcolon, ppr ty]
   ppr (IfaceClassP cls ts) = parenSymOcc (getOccName cls) (ppr cls)
                             <+> sep (map pprParendIfaceType ts)
@@ -256,13 +251,15 @@ instance Outputable IfaceTyCon where
 pprIfaceContext :: IfaceContext -> SDoc
 -- Prints "(C a, D b) =>", including the arrow
 pprIfaceContext []     = empty
-pprIfaceContext theta = ppr_preds theta <+> ptext SLIT("=>")
+pprIfaceContext theta = ppr_preds theta <+> ptext (sLit "=>")
 
+ppr_preds :: [IfacePredType] -> SDoc
 ppr_preds [pred] = ppr pred    -- No parens
 ppr_preds preds  = parens (sep (punctuate comma (map ppr preds))) 
                         
 -------------------
-pabrackets p = ptext SLIT("[:") <> p <> ptext SLIT(":]")
+pabrackets :: SDoc -> SDoc
+pabrackets p = ptext (sLit "[:") <> p <> ptext (sLit ":]")
 \end{code}
 
 %************************************************************************
@@ -273,14 +270,19 @@ pabrackets p = ptext SLIT("[:") <> p <> ptext SLIT(":]")
 
 \begin{code}
 ----------------
+toIfaceTvBndr :: TyVar -> (FastString, IfaceType)
 toIfaceTvBndr tyvar   = (occNameFS (getOccName tyvar), toIfaceKind (tyVarKind tyvar))
+toIfaceIdBndr :: Id -> (FastString, IfaceType)
 toIfaceIdBndr id      = (occNameFS (getOccName id),    toIfaceType (idType id))
+toIfaceTvBndrs :: [TyVar] -> [(FastString, IfaceType)]
 toIfaceTvBndrs tyvars = map toIfaceTvBndr tyvars
 
+toIfaceBndr :: Var -> IfaceBndr
 toIfaceBndr var
   | isId var  = IfaceIdBndr (toIfaceIdBndr var)
   | otherwise = IfaceTvBndr (toIfaceTvBndr var)
 
+toIfaceKind :: Type -> IfaceType
 toIfaceKind = toIfaceType
 
 ---------------------
@@ -298,8 +300,6 @@ toIfaceType (ForAllTy tv t) =
   IfaceForAllTy (toIfaceTvBndr tv) (toIfaceType t)
 toIfaceType (PredTy st) =
   IfacePredTy (toIfacePred st)
-toIfaceType (NoteTy other_note ty) =
-  toIfaceType ty
 
 ----------------
 -- A little bit of (perhaps optional) trickiness here.  When
@@ -337,9 +337,11 @@ toIfaceWiredInTyCon tc nm
   | otherwise                      = IfaceTc nm
 
 ----------------
+toIfaceTypes :: [Type] -> [IfaceType]
 toIfaceTypes ts = map toIfaceType ts
 
 ----------------
+toIfacePred :: PredType -> IfacePredType
 toIfacePred (ClassP cls ts) = 
   IfaceClassP (getName cls) (toIfaceTypes ts)
 toIfacePred (IParam ip t) =