module TyCon(
TyCon(..), -- NB: some pals need to see representation
- Arity(..), NewOrData(..),
+ SYN_IE(Arity), NewOrData(..),
isFunTyCon, isPrimTyCon, isBoxedTyCon,
- isDataTyCon, isSynTyCon, isNewTyCon,
+ isAlgTyCon, isDataTyCon, isSynTyCon, isNewTyCon, maybeNewTyCon,
mkDataTyCon,
mkFunTyCon,
tyConDataCons,
tyConFamilySize,
tyConDerivings,
- tyConArity, synTyConArity,
+ tyConTheta,
+ tyConPrimRep,
+ synTyConArity,
getSynTyConDefn,
maybeTyConSingleCon,
- isEnumerationTyCon,
- derivedFor
+ isEnumerationTyCon, isTupleTyCon,
+ derivedClasses
) where
CHK_Ubiq() -- debugging consistency check
-import TyLoop ( Type(..), GenType,
- Class(..), GenClass,
- Id(..), GenId,
- mkTupleCon, dataConSig,
- specMaybeTysSuffix
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 201
+IMPORT_DELOOPER(TyLoop) ( SYN_IE(Type), GenType,
+ SYN_IE(Class), GenClass,
+ SYN_IE(Id), GenId,
+ splitSigmaTy, splitFunTy,
+ tupleCon, isNullaryDataCon, idType
+ --LATER: specMaybeTysSuffix
)
-
-import TyVar ( GenTyVar, alphaTyVars, alphaTyVar, betaTyVar )
-import Usage ( GenUsage, Usage(..) )
+#else
+import {-# SOURCE #-} Type ( Type, splitSigmaTy, splitFunTy )
+import {-# SOURCE #-} Class ( Class )
+import {-# SOURCE #-} Id ( Id, isNullaryDataCon, idType )
+import {-# SOURCE #-} TysWiredIn ( tupleCon )
+#endif
+
+import BasicTypes ( SYN_IE(Arity), NewOrData(..) )
+import TyVar ( GenTyVar, alphaTyVars, alphaTyVar, betaTyVar, SYN_IE(TyVar) )
+import Usage ( GenUsage, SYN_IE(Usage) )
import Kind ( Kind, mkBoxedTypeKind, mkArrowKind, resultKind, argKind )
import Maybes
-import Name ( Name, RdrName(..), appendRdr, nameUnique,
- mkTupleTyConName, mkFunTyConName
- )
-import Unique ( Unique, funTyConKey, mkTupleTyConUnique )
-import PrelInfo ( intDataCon, charDataCon )
-import Pretty ( Pretty(..), PrettyRep )
-import PprStyle ( PprStyle )
+import Name ( Name, nameUnique, mkWiredInTyConName, NamedThing(getName) )
+import Unique ( Unique, funTyConKey, Uniquable(..) )
+import Pretty ( Doc )
+import PrimRep ( PrimRep(..) )
+import PrelMods ( gHC__, pREL_TUP, pREL_BASE )
+import Lex ( mkTupNameStr )
import SrcLoc ( SrcLoc, mkBuiltinSrcLoc )
-import Unique ( intDataConKey, charDataConKey )
-import Util ( panic, panic#, nOfThem, isIn, Ord3(..) )
+import Util ( nOfThem, isIn, Ord3(..), panic, panic#, assertPanic )
\end{code}
\begin{code}
-type Arity = Int
-
data TyCon
= FunTyCon -- Kind = Type -> Type -> Type
Kind
[TyVar]
[(Class,Type)] -- Its context
- [Id] -- Its data constructors, with fully polymorphic types
+ [Id{-DataCon-}] -- Its data constructors, with fully polymorphic types
+ -- This list can be empty, when we import a data type abstractly,
+ -- either (a) the interface is hand-written and doesn't give
+ -- the constructors, or
+ -- (b) in a quest for fast compilation we don't import
+ -- the constructors
[Class] -- Classes which have derived instances
NewOrData
Unique -- Always unboxed; hence never represented by a closure
Name -- Often represented by a bit-pattern for the thing
Kind -- itself (eg Int#), but sometimes by a pointer to
+ PrimRep
| SpecTyCon -- A specialised TyCon; eg (Arr# Int#), or (List Int#)
TyCon
Type -- Right-hand side, mentioning these type vars.
-- Acts as a template for the expansion when
-- the tycon is applied to some types.
-
-data NewOrData
- = NewType -- "newtype Blah ..."
- | DataType -- "data Blah ..."
\end{code}
\begin{code}
-mkFunTyCon = FunTyCon
-mkSpecTyCon = SpecTyCon
+mkFunTyCon = FunTyCon
+mkFunTyConName = mkWiredInTyConName funTyConKey gHC__ SLIT("->") FunTyCon
-mkTupleTyCon arity
- = TupleTyCon u n arity
- where
- n = mkTupleTyConName arity
- u = uniqueOf n
+mkSpecTyCon = SpecTyCon
+mkTupleTyCon = TupleTyCon
-mkDataTyCon name
- = DataTyCon (nameUnique name) name
-mkPrimTyCon name
- = PrimTyCon (nameUnique name) name
-mkSynTyCon name
- = SynTyCon (nameUnique name) name
+mkDataTyCon name = DataTyCon (nameUnique name) name
+mkPrimTyCon name = PrimTyCon (nameUnique name) name
+mkSynTyCon name = SynTyCon (nameUnique name) name
isFunTyCon FunTyCon = True
isFunTyCon _ = False
-isPrimTyCon (PrimTyCon _ _ _) = True
+isPrimTyCon (PrimTyCon _ _ _ _) = True
isPrimTyCon _ = False
-- At present there are no unboxed non-primitive types, so
-- isBoxedTyCon is just the negation of isPrimTyCon.
isBoxedTyCon = not . isPrimTyCon
+-- isAlgTyCon returns True for both @data@ and @newtype@
+isAlgTyCon (DataTyCon _ _ _ _ _ _ _ _) = True
+isAlgTyCon (TupleTyCon _ _ _) = True
+isAlgTyCon other = False
+
-- isDataTyCon returns False for @newtype@.
--- Not sure about this decision yet.
isDataTyCon (DataTyCon _ _ _ _ _ _ _ DataType) = True
isDataTyCon (TupleTyCon _ _ _) = True
isDataTyCon other = False
+maybeNewTyCon :: TyCon -> Maybe ([TyVar], Type) -- Returns representation type info
+maybeNewTyCon (DataTyCon _ _ _ _ _ (con:null_cons) _ NewType)
+ = ASSERT( null null_cons && null null_tys)
+ Just (tyvars, rep_ty)
+ where
+ (tyvars, theta, tau) = splitSigmaTy (idType con)
+ (rep_ty:null_tys, res_ty) = splitFunTy tau
+
+maybeNewTyCon other = Nothing
+
isNewTyCon (DataTyCon _ _ _ _ _ _ _ NewType) = True
isNewTyCon other = False
tyConKind :: TyCon -> Kind
tyConKind FunTyCon = kind2
tyConKind (DataTyCon _ _ kind _ _ _ _ _) = kind
-tyConKind (PrimTyCon _ _ kind) = kind
+tyConKind (PrimTyCon _ _ kind _) = kind
tyConKind (SynTyCon _ _ k _ _ _) = k
tyConKind (TupleTyCon _ _ n)
tyConUnique FunTyCon = funTyConKey
tyConUnique (DataTyCon uniq _ _ _ _ _ _ _) = uniq
tyConUnique (TupleTyCon uniq _ _) = uniq
-tyConUnique (PrimTyCon uniq _ _) = uniq
+tyConUnique (PrimTyCon uniq _ _ _) = uniq
tyConUnique (SynTyCon uniq _ _ _ _ _) = uniq
tyConUnique (SpecTyCon _ _ ) = panic "tyConUnique:SpecTyCon"
-tyConArity :: TyCon -> Arity
-tyConArity FunTyCon = 2
-tyConArity (DataTyCon _ _ _ tvs _ _ _ _) = length tvs
-tyConArity (TupleTyCon _ _ arity) = arity
-tyConArity (PrimTyCon _ _ _) = 0 -- ??
-tyConArity (SpecTyCon _ _) = 0
-tyConArity (SynTyCon _ _ _ arity _ _) = arity
-
synTyConArity :: TyCon -> Maybe Arity -- Nothing <=> not a syn tycon
synTyConArity (SynTyCon _ _ _ arity _ _) = Just arity
synTyConArity _ = Nothing
tyConTyVars (DataTyCon _ _ _ tvs _ _ _ _) = tvs
tyConTyVars (TupleTyCon _ _ arity) = take arity alphaTyVars
tyConTyVars (SynTyCon _ _ _ _ tvs _) = tvs
-tyConTyVars (PrimTyCon _ _ _) = panic "tyConTyVars:PrimTyCon"
+#ifdef DEBUG
+tyConTyVars (PrimTyCon _ _ _ _) = panic "tyConTyVars:PrimTyCon"
tyConTyVars (SpecTyCon _ _ ) = panic "tyConTyVars:SpecTyCon"
+#endif
\end{code}
\begin{code}
tyConFamilySize :: TyCon -> Int
tyConDataCons (DataTyCon _ _ _ _ _ data_cons _ _) = data_cons
-tyConDataCons (TupleTyCon _ _ a) = [mkTupleCon a]
+tyConDataCons (TupleTyCon _ _ a) = [tupleCon a]
tyConDataCons other = []
-- You may think this last equation should fail,
-- but it's quite convenient to return no constructors for
tyConFamilySize (DataTyCon _ _ _ _ _ data_cons _ _) = length data_cons
tyConFamilySize (TupleTyCon _ _ _) = 1
+#ifdef DEBUG
+--tyConFamilySize other = pprPanic "tyConFamilySize:" (pprTyCon PprDebug other)
+#endif
+
+tyConPrimRep :: TyCon -> PrimRep
+tyConPrimRep (PrimTyCon _ _ _ rep) = rep
+tyConPrimRep _ = PtrRep
\end{code}
\begin{code}
\end{code}
\begin{code}
+tyConTheta :: TyCon -> [(Class,Type)]
+tyConTheta (DataTyCon _ _ _ _ theta _ _ _) = theta
+tyConTheta (TupleTyCon _ _ _) = []
+-- should ask about anything else
+\end{code}
+
+\begin{code}
getSynTyConDefn :: TyCon -> ([TyVar], Type)
getSynTyConDefn (SynTyCon _ _ _ _ tyvars ty) = (tyvars,ty)
\end{code}
\begin{code}
maybeTyConSingleCon :: TyCon -> Maybe Id
-maybeTyConSingleCon (TupleTyCon _ _ arity) = Just (mkTupleCon arity)
+maybeTyConSingleCon (TupleTyCon _ _ arity) = Just (tupleCon arity)
maybeTyConSingleCon (DataTyCon _ _ _ _ _ [c] _ _) = Just c
maybeTyConSingleCon (DataTyCon _ _ _ _ _ _ _ _) = Nothing
-maybeTyConSingleCon (PrimTyCon _ _ _) = Nothing
+maybeTyConSingleCon (PrimTyCon _ _ _ _) = Nothing
maybeTyConSingleCon (SpecTyCon tc tys) = panic "maybeTyConSingleCon:SpecTyCon"
-- requires DataCons of TyCon
isEnumerationTyCon (TupleTyCon _ _ arity)
= arity == 0
isEnumerationTyCon (DataTyCon _ _ _ _ _ data_cons _ _)
- = not (null data_cons) && all is_nullary data_cons
- where
- is_nullary con = case (dataConSig con) of { (_,_, arg_tys, _) ->
- null arg_tys }
+ = not (null data_cons) && all isNullaryDataCon data_cons
+
+
+isTupleTyCon (TupleTyCon _ _ arity) = arity >= 2 -- treat "0-tuple" specially
+isTupleTyCon (SpecTyCon tc tys) = isTupleTyCon tc
+isTupleTyCon other = False
+
+
\end{code}
@derivedFor@ reports if we have an {\em obviously}-derived instance
ToDo: what about derivings for specialised tycons !!!
\begin{code}
-derivedFor :: Class -> TyCon -> Bool
-derivedFor clas (DataTyCon _ _ _ _ _ _ derivs _) = isIn "derivedFor" clas derivs
-derivedFor clas something_weird = False
+derivedClasses :: TyCon -> [Class]
+derivedClasses (DataTyCon _ _ _ _ _ _ derivs _) = derivs
+derivedClasses something_weird = []
\end{code}
%************************************************************************
\begin{code}
instance Ord3 TyCon where
- cmp FunTyCon FunTyCon = EQ_
- cmp (DataTyCon a _ _ _ _ _ _ _) (DataTyCon b _ _ _ _ _ _ _) = a `cmp` b
- cmp (SynTyCon a _ _ _ _ _) (SynTyCon b _ _ _ _ _) = a `cmp` b
- cmp (TupleTyCon _ _ a) (TupleTyCon _ _ b) = a `cmp` b
- cmp (PrimTyCon a _ _) (PrimTyCon b _ _) = a `cmp` b
- cmp (SpecTyCon tc1 mtys1) (SpecTyCon tc2 mtys2)
- = panic# "cmp on SpecTyCons" -- case (tc1 `cmp` tc2) of { EQ_ -> mtys1 `cmp` mtys2; xxx -> xxx }
-
- -- now we *know* the tags are different, so...
- cmp other_1 other_2
- | tag1 _LT_ tag2 = LT_
- | otherwise = GT_
- where
- tag1 = tag_TyCon other_1
- tag2 = tag_TyCon other_2
-
- tag_TyCon FunTyCon = ILIT(1)
- tag_TyCon (DataTyCon _ _ _ _ _ _ _ _) = ILIT(2)
- tag_TyCon (TupleTyCon _ _ _) = ILIT(3)
- tag_TyCon (PrimTyCon _ _ _) = ILIT(4)
- tag_TyCon (SpecTyCon _ _) = ILIT(5)
- tag_TyCon (SynTyCon _ _ _ _ _ _) = ILIT(6)
+ cmp tc1 tc2 = uniqueOf tc1 `cmp` uniqueOf tc2
instance Eq TyCon where
a == b = case (a `cmp` b) of { EQ_ -> True; _ -> False }
instance Uniquable TyCon where
uniqueOf (DataTyCon u _ _ _ _ _ _ _) = u
uniqueOf (TupleTyCon u _ _) = u
- uniqueOf (PrimTyCon u _ _) = u
+ uniqueOf (PrimTyCon u _ _ _) = u
uniqueOf (SynTyCon u _ _ _ _ _) = u
uniqueOf tc@(SpecTyCon _ _) = panic "uniqueOf:SpecTyCon"
uniqueOf tc = uniqueOf (getName tc)
\begin{code}
instance NamedThing TyCon where
getName (DataTyCon _ n _ _ _ _ _ _) = n
- getName (PrimTyCon _ n _) = n
+ getName (PrimTyCon _ n _ _) = n
getName (SpecTyCon tc _) = getName tc
getName (SynTyCon _ n _ _ _ _) = n
getName FunTyCon = mkFunTyConName
getName tc = panic "TyCon.getName"
{- LATER:
- getName (SpecTyCon tc tys) = let (m,n) = moduleNamePair tc in
+ getName (SpecTyCon tc tys) = let (OrigName m n) = origName "????" tc in
(m, n _APPEND_ specMaybeTysSuffix tys)
getName other_tc = moduleNamePair (expectJust "tycon1" (getName other_tc))
getName other = Nothing
-}
+
\end{code}
projects / ghc-hetmet.git / blobdiff