X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fiface%2FIfaceType.lhs;fp=compiler%2Fiface%2FIfaceType.lhs;h=7817b423aeb84de8ecc3fcb2960304a2edb6c764;hp=c97e16eef266c288f8503eec2261f95c0e5867ad;hb=1b381af863d64aaa0a4dd9c816170c58e6131a9e;hpb=c25b934ef544fa3eba0a9f9da41b363c470156cb diff --git a/compiler/iface/IfaceType.lhs b/compiler/iface/IfaceType.lhs index c97e16e..7817b42 100644 --- a/compiler/iface/IfaceType.lhs +++ b/compiler/iface/IfaceType.lhs @@ -9,15 +9,18 @@ This module defines interface types and binders module IfaceType ( IfExtName, IfLclName, - IfaceType(..), IfaceKind, IfacePredType(..), IfaceTyCon(..), + IfaceType(..), IfaceKind, IfacePredType(..), IfaceTyCon(..), IfaceCoCon(..), IfaceContext, IfaceBndr(..), IfaceTvBndr, IfaceIdBndr, IfaceCoercion, ifaceTyConName, -- Conversion from Type -> IfaceType - toIfaceType, toIfacePred, toIfaceContext, + toIfaceType, toIfaceContext, toIfaceBndr, toIfaceIdBndr, toIfaceTvBndrs, toIfaceTyCon, toIfaceTyCon_name, + -- Conversion from Coercion -> IfaceType + coToIfaceType, + -- Printing pprIfaceType, pprParendIfaceType, pprIfaceContext, pprIfaceIdBndr, pprIfaceTvBndr, pprIfaceTvBndrs, pprIfaceBndrs, @@ -25,11 +28,13 @@ module IfaceType ( ) where -import TypeRep +import Coercion +import TypeRep hiding( maybeParen ) import TyCon import Id import Var import TysWiredIn +import TysPrim import Name import BasicTypes import Outputable @@ -59,14 +64,15 @@ type IfaceTvBndr = (IfLclName, IfaceKind) type IfaceKind = IfaceType type IfaceCoercion = IfaceType -data IfaceType - = IfaceTyVar IfLclName -- Type variable only, not tycon +data IfaceType -- A kind of universal type, used for types, kinds, and coercions + = IfaceTyVar IfLclName -- Type/coercion variable only, not tycon | IfaceAppTy IfaceType IfaceType + | IfaceFunTy IfaceType IfaceType | IfaceForAllTy IfaceTvBndr IfaceType | IfacePredTy IfacePredType - | IfaceTyConApp IfaceTyCon [IfaceType] -- Not necessarily saturated - -- Includes newtypes, synonyms, tuples - | IfaceFunTy IfaceType IfaceType + | IfaceTyConApp IfaceTyCon [IfaceType] -- Not necessarily saturated + -- Includes newtypes, synonyms, tuples + | IfaceCoConApp IfaceCoCon [IfaceType] -- Always saturated data IfacePredType -- NewTypes are handled as ordinary TyConApps = IfaceClassP IfExtName [IfaceType] @@ -75,18 +81,28 @@ data IfacePredType -- NewTypes are handled as ordinary TyConApps type IfaceContext = [IfacePredType] -data IfaceTyCon -- Abbreviations for common tycons with known names +data IfaceTyCon -- Encodes type consructors, kind constructors + -- coercion constructors, the lot = IfaceTc IfExtName -- The common case | IfaceIntTc | IfaceBoolTc | IfaceCharTc | IfaceListTc | IfacePArrTc | IfaceTupTc Boxity Arity | IfaceAnyTc IfaceKind -- Used for AnyTyCon (see Note [Any Types] in TysPrim) -- other than 'Any :: *' itself + + -- Kind constructors | IfaceLiftedTypeKindTc | IfaceOpenTypeKindTc | IfaceUnliftedTypeKindTc | IfaceUbxTupleKindTc | IfaceArgTypeKindTc -ifaceTyConName :: IfaceTyCon -> IfExtName -ifaceTyConName IfaceIntTc = intTyConName + -- Coercion constructors +data IfaceCoCon + = IfaceCoAx IfExtName + | IfaceReflCo | IfaceUnsafeCo | IfaceSymCo + | IfaceTransCo | IfaceInstCo + | IfaceNthCo Int + +ifaceTyConName :: IfaceTyCon -> Name +ifaceTyConName IfaceIntTc = intTyConName ifaceTyConName IfaceBoolTc = boolTyConName ifaceTyConName IfaceCharTc = charTyConName ifaceTyConName IfaceListTc = listTyConName @@ -208,6 +224,10 @@ ppr_ty _ (IfaceTyVar tyvar) = ppr tyvar ppr_ty ctxt_prec (IfaceTyConApp tc tys) = ppr_tc_app ctxt_prec tc tys ppr_ty _ (IfacePredTy st) = ppr st +ppr_ty ctxt_prec (IfaceCoConApp tc tys) + = maybeParen ctxt_prec tYCON_PREC + (sep [ppr tc, nest 4 (sep (map pprParendIfaceType tys))]) + -- Function types ppr_ty ctxt_prec (IfaceFunTy ty1 ty2) = -- We don't want to lose synonyms, so we mustn't use splitFunTys here. @@ -268,6 +288,15 @@ instance Outputable IfaceTyCon where -- so we fake it. It's only for debug printing! ppr other_tc = ppr (ifaceTyConName other_tc) +instance Outputable IfaceCoCon where + ppr (IfaceCoAx n) = ppr n + ppr IfaceReflCo = ptext (sLit "Refl") + ppr IfaceUnsafeCo = ptext (sLit "Unsafe") + ppr IfaceSymCo = ptext (sLit "Sym") + ppr IfaceTransCo = ptext (sLit "Trans") + ppr IfaceInstCo = ptext (sLit "Inst") + ppr (IfaceNthCo d) = ptext (sLit "Nth:") <> int d + ------------------- pprIfaceContext :: IfaceContext -> SDoc -- Prints "(C a, D b) =>", including the arrow @@ -309,18 +338,15 @@ toIfaceKind = toIfaceType --------------------- toIfaceType :: Type -> IfaceType -- Synonyms are retained in the interface type -toIfaceType (TyVarTy tv) = - IfaceTyVar (occNameFS (getOccName tv)) -toIfaceType (AppTy t1 t2) = - IfaceAppTy (toIfaceType t1) (toIfaceType t2) -toIfaceType (FunTy t1 t2) = - IfaceFunTy (toIfaceType t1) (toIfaceType t2) -toIfaceType (TyConApp tc tys) = - IfaceTyConApp (toIfaceTyCon tc) (toIfaceTypes tys) -toIfaceType (ForAllTy tv t) = - IfaceForAllTy (toIfaceTvBndr tv) (toIfaceType t) -toIfaceType (PredTy st) = - IfacePredTy (toIfacePred st) +toIfaceType (TyVarTy tv) = IfaceTyVar (toIfaceTyCoVar tv) +toIfaceType (AppTy t1 t2) = IfaceAppTy (toIfaceType t1) (toIfaceType t2) +toIfaceType (FunTy t1 t2) = IfaceFunTy (toIfaceType t1) (toIfaceType t2) +toIfaceType (TyConApp tc tys) = IfaceTyConApp (toIfaceTyCon tc) (toIfaceTypes tys) +toIfaceType (ForAllTy tv t) = IfaceForAllTy (toIfaceTvBndr tv) (toIfaceType t) +toIfaceType (PredTy st) = IfacePredTy (toIfacePred toIfaceType st) + +toIfaceTyCoVar :: TyCoVar -> FastString +toIfaceTyCoVar = occNameFS . getOccName ---------------- -- A little bit of (perhaps optional) trickiness here. When @@ -364,16 +390,39 @@ toIfaceTypes :: [Type] -> [IfaceType] toIfaceTypes ts = map toIfaceType ts ---------------- -toIfacePred :: PredType -> IfacePredType -toIfacePred (ClassP cls ts) = - IfaceClassP (getName cls) (toIfaceTypes ts) -toIfacePred (IParam ip t) = - IfaceIParam (mapIPName getOccName ip) (toIfaceType t) -toIfacePred (EqPred ty1 ty2) = - IfaceEqPred (toIfaceType ty1) (toIfaceType ty2) +toIfacePred :: (a -> IfaceType) -> Pred a -> IfacePredType +toIfacePred to (ClassP cls ts) = IfaceClassP (getName cls) (map to ts) +toIfacePred to (IParam ip t) = IfaceIParam (mapIPName getOccName ip) (to t) +toIfacePred to (EqPred ty1 ty2) = IfaceEqPred (to ty1) (to ty2) ---------------- toIfaceContext :: ThetaType -> IfaceContext -toIfaceContext cs = map toIfacePred cs +toIfaceContext cs = map (toIfacePred toIfaceType) cs + +---------------- +coToIfaceType :: Coercion -> IfaceType +coToIfaceType (Refl ty) = IfaceCoConApp IfaceReflCo [toIfaceType ty] +coToIfaceType (TyConAppCo tc cos) = IfaceTyConApp (toIfaceTyCon tc) + (map coToIfaceType cos) +coToIfaceType (AppCo co1 co2) = IfaceAppTy (coToIfaceType co1) + (coToIfaceType co2) +coToIfaceType (ForAllCo v co) = IfaceForAllTy (toIfaceTvBndr v) + (coToIfaceType co) +coToIfaceType (CoVarCo cv) = IfaceTyVar (toIfaceTyCoVar cv) +coToIfaceType (AxiomInstCo con cos) = IfaceCoConApp (IfaceCoAx (coAxiomName con)) + (map coToIfaceType cos) +coToIfaceType (UnsafeCo ty1 ty2) = IfaceCoConApp IfaceUnsafeCo + [ toIfaceType ty1 + , toIfaceType ty2 ] +coToIfaceType (SymCo co) = IfaceCoConApp IfaceSymCo + [ coToIfaceType co ] +coToIfaceType (TransCo co1 co2) = IfaceCoConApp IfaceTransCo + [ coToIfaceType co1 + , coToIfaceType co2 ] +coToIfaceType (NthCo d co) = IfaceCoConApp (IfaceNthCo d) + [ coToIfaceType co ] +coToIfaceType (InstCo co ty) = IfaceCoConApp IfaceInstCo + [ coToIfaceType co + , toIfaceType ty ] \end{code}