isAlgTyCon, isDataTyCon, isSynTyCon, isNewTyCon, isPrimTyCon,
isEnumerationTyCon,
isTupleTyCon, isUnboxedTupleTyCon, isBoxedTupleTyCon, tupleTyConBoxity,
- isRecursiveTyCon, newTyConRep,
+ isRecursiveTyCon, newTyConRep, isHiBootTyCon,
mkForeignTyCon, isForeignTyCon,
tyConKind,
tyConUnique,
tyConTyVars,
- tyConArgVrcs_maybe,
+ tyConArgVrcs_maybe, tyConArgVrcs,
tyConDataConDetails, tyConDataCons, tyConDataCons_maybe, tyConFamilySize,
tyConSelIds,
tyConTheta,
tyConArity,
isClassTyCon, tyConClass_maybe,
getSynTyConDefn,
+ tyConExtName, -- External name for foreign types
maybeTyConSingleCon,
matchesTyCon,
-- Generics
- tyConGenIds, tyConGenInfo
+ tyConHasGenerics
) where
#include "HsVersions.h"
import Var ( TyVar, Id )
import Class ( Class )
-import BasicTypes ( Arity, RecFlag(..), Boxity(..),
- isBoxed, EP(..) )
+import BasicTypes ( Arity, RecFlag(..), Boxity(..), isBoxed )
import Name ( Name, nameUnique, NamedThing(getName) )
import PrelNames ( Unique, Uniquable(..), anyBoxConKey )
import PrimRep ( PrimRep(..), isFollowableRep )
-import Maybes ( orElse )
+import Maybes ( orElse, expectJust )
import Outputable
import FastString
\end{code}
tyConArity :: Arity,
tyConTyVars :: [TyVar],
- tyConArgVrcs :: ArgVrcs,
+ argVrcs :: ArgVrcs,
algTyConTheta :: [PredType],
dataCons :: DataConDetails DataCon,
algTyConRec :: RecFlag, -- Tells whether the data type is part of
-- a mutually-recursive group or not
- genInfo :: Maybe (EP Id), -- Convert T <-> Tring
- -- Some TyCons don't have it;
- -- e.g. the TyCon for a Class dictionary,
- -- and TyCons with unboxed arguments
+ hasGenerics :: Bool, -- True <=> generic to/from functions are available
+ -- (in the exports of the data type's source module)
algTyConClass :: Maybe Class
-- Just cl if this tycon came from a class declaration
tyConName :: Name,
tyConKind :: Kind,
tyConArity :: Arity,
- tyConArgVrcs :: ArgVrcs,
+ argVrcs :: ArgVrcs,
primTyConRep :: PrimRep, -- Many primitive tycons are unboxed, but some are
-- boxed (represented by pointers). The PrimRep tells.
isUnLifted :: Bool, -- Most primitive tycons are unlifted,
-- but foreign-imported ones may not be
- tyConExtName :: Maybe FastString
+ tyConExtName :: Maybe FastString -- Just xx for foreign-imported types
}
| TupleTyCon {
tyConBoxed :: Boxity,
tyConTyVars :: [TyVar],
dataCon :: DataCon,
- genInfo :: Maybe (EP Id) -- Generic type and conv funs
+ hasGenerics :: Bool
}
| SynTyCon {
synTyConDefn :: Type, -- Right-hand side, mentioning these type vars.
-- Acts as a template for the expansion when
-- the tycon is applied to some types.
- tyConArgVrcs :: ArgVrcs
+ argVrcs :: ArgVrcs
}
| KindCon { -- Type constructor at the kind level
}
type ArgVrcs = [(Bool,Bool)] -- Tyvar variance info: [(occPos,occNeg)]
+ -- [] means "no information, assume the worst"
data AlgTyConFlavour
- = DataTyCon -- Data type
-
- | EnumTyCon -- Special sort of enumeration type
+ = DataTyCon Bool -- Data type; True <=> an enumeration type
| NewTyCon Type -- Newtype, with its *ultimate* representation type
-- By 'ultimate' I mean that the rep type is not itself
| Unknown -- We're importing this data type from an hi-boot file
-- and we don't know what its constructors are
- | HasCons Int -- In a quest for compilation speed we have imported
- -- only the number of constructors (to get return
- -- conventions right) but not the constructors themselves
-
visibleDataCons (DataCons cs) = cs
visibleDataCons other = []
\end{code}
tyConArity = 2
}
-tyConGenInfo :: TyCon -> Maybe (EP Id)
-tyConGenInfo (AlgTyCon { genInfo = info }) = info
-tyConGenInfo (TupleTyCon { genInfo = info }) = info
-tyConGenInfo other = Nothing
-
-tyConGenIds :: TyCon -> [Id]
--- Returns the generic-programming Ids; these Ids need bindings
-tyConGenIds tycon = case tyConGenInfo tycon of
- Nothing -> []
- Just (EP from to) -> [from,to]
-
-- This is the making of a TyCon. Just the same as the old mkAlgTyCon,
-- but now you also have to pass in the generic information about the type
-- constructor - you can get hold of it easily (see Generics module)
-mkAlgTyCon name kind tyvars theta argvrcs cons sels flavour is_rec
- gen_info
+mkAlgTyCon name kind tyvars theta argvrcs cons sels flavour is_rec gen_info
= AlgTyCon {
- tyConName = name,
- tyConUnique = nameUnique name,
- tyConKind = kind,
- tyConArity = length tyvars,
- tyConTyVars = tyvars,
- tyConArgVrcs = argvrcs,
- algTyConTheta = theta,
- dataCons = cons,
- selIds = sels,
- algTyConClass = Nothing,
- algTyConFlavour = flavour,
- algTyConRec = is_rec,
- genInfo = gen_info
+ tyConName = name,
+ tyConUnique = nameUnique name,
+ tyConKind = kind,
+ tyConArity = length tyvars,
+ tyConTyVars = tyvars,
+ argVrcs = argvrcs,
+ algTyConTheta = theta,
+ dataCons = cons,
+ selIds = sels,
+ algTyConClass = Nothing,
+ algTyConFlavour = flavour,
+ algTyConRec = is_rec,
+ hasGenerics = gen_info
}
mkClassTyCon name kind tyvars argvrcs con clas flavour is_rec
= AlgTyCon {
- tyConName = name,
- tyConUnique = nameUnique name,
- tyConKind = kind,
- tyConArity = length tyvars,
- tyConTyVars = tyvars,
- tyConArgVrcs = argvrcs,
- algTyConTheta = [],
- dataCons = DataCons [con],
- selIds = [],
- algTyConClass = Just clas,
- algTyConFlavour = flavour,
- algTyConRec = is_rec,
- genInfo = Nothing
+ tyConName = name,
+ tyConUnique = nameUnique name,
+ tyConKind = kind,
+ tyConArity = length tyvars,
+ tyConTyVars = tyvars,
+ argVrcs = argvrcs,
+ algTyConTheta = [],
+ dataCons = DataCons [con],
+ selIds = [],
+ algTyConClass = Just clas,
+ algTyConFlavour = flavour,
+ algTyConRec = is_rec,
+ hasGenerics = False
}
tyConBoxed = boxed,
tyConTyVars = tyvars,
dataCon = con,
- genInfo = gen_info
+ hasGenerics = gen_info
}
-- Foreign-imported (.NET) type constructors are represented
tyConUnique = nameUnique name,
tyConKind = kind,
tyConArity = arity,
- tyConArgVrcs = arg_vrcs,
+ argVrcs = arg_vrcs,
primTyConRep = PtrRep,
isUnLifted = False,
tyConExtName = ext_name
tyConUnique = nameUnique name,
tyConKind = kind,
tyConArity = arity,
- tyConArgVrcs = arg_vrcs,
+ argVrcs = arg_vrcs,
primTyConRep = rep,
isUnLifted = is_unlifted,
tyConExtName = Nothing
}
-mkSynTyCon name kind arity tyvars rhs argvrcs
+mkSynTyCon name kind tyvars rhs argvrcs
= SynTyCon {
tyConName = name,
tyConUnique = nameUnique name,
tyConKind = kind,
- tyConArity = arity,
+ tyConArity = length tyvars,
tyConTyVars = tyvars,
synTyConDefn = rhs,
- tyConArgVrcs = argvrcs
+ argVrcs = argvrcs
}
setTyConName tc name = tc {tyConName = name, tyConUnique = nameUnique name}
isSynTyCon _ = False
isEnumerationTyCon :: TyCon -> Bool
-isEnumerationTyCon (AlgTyCon {algTyConFlavour = EnumTyCon}) = True
-isEnumerationTyCon other = False
+isEnumerationTyCon (AlgTyCon {algTyConFlavour = DataTyCon is_enum}) = is_enum
+isEnumerationTyCon other = False
isTupleTyCon :: TyCon -> Bool
-- The unit tycon didn't used to be classed as a tuple tycon
isRecursiveTyCon (AlgTyCon {algTyConRec = Recursive}) = True
isRecursiveTyCon other = False
+isHiBootTyCon :: TyCon -> Bool
+-- Used for knot-tying in hi-boot files
+isHiBootTyCon (AlgTyCon {dataCons = Unknown}) = True
+isHiBootTyCon other = False
+
isForeignTyCon :: TyCon -> Bool
-- isForeignTyCon identifies foreign-imported type constructors
-- For the moment, they are primitive but lifted, but that may change
\end{code}
\begin{code}
+tyConHasGenerics :: TyCon -> Bool
+tyConHasGenerics (AlgTyCon {hasGenerics = hg}) = hg
+tyConHasGenerics (TupleTyCon {hasGenerics = hg}) = hg
+tyConHasGenerics other = False -- Synonyms
+
tyConDataConDetails :: TyCon -> DataConDetails DataCon
tyConDataConDetails (AlgTyCon {dataCons = cons}) = cons
tyConDataConDetails (TupleTyCon {dataCon = con}) = DataCons [con]
tyConFamilySize :: TyCon -> Int
tyConFamilySize (AlgTyCon {dataCons = DataCons cs}) = length cs
-tyConFamilySize (AlgTyCon {dataCons = HasCons n}) = n
tyConFamilySize (TupleTyCon {}) = 1
#ifdef DEBUG
tyConFamilySize other = pprPanic "tyConFamilySize:" (ppr other)
actually computed (in another file).
\begin{code}
-tyConArgVrcs_maybe :: TyCon -> Maybe ArgVrcs
+tyConArgVrcs :: TyCon -> ArgVrcs
+tyConArgVrcs tc = expectJust "tyConArgVrcs" (tyConArgVrcs_maybe tc)
-tyConArgVrcs_maybe (FunTyCon {} ) = Just [(False,True),(True,False)]
-tyConArgVrcs_maybe (AlgTyCon {tyConArgVrcs = oi}) = Just oi
-tyConArgVrcs_maybe (PrimTyCon {tyConArgVrcs = oi}) = Just oi
-tyConArgVrcs_maybe (TupleTyCon {tyConArity = arity }) = Just (replicate arity (True,False))
-tyConArgVrcs_maybe (SynTyCon {tyConArgVrcs = oi }) = Just oi
-tyConArgVrcs_maybe _ = Nothing
+tyConArgVrcs_maybe :: TyCon -> Maybe ArgVrcs
+tyConArgVrcs_maybe (FunTyCon {}) = Just [(False,True),(True,False)]
+tyConArgVrcs_maybe (AlgTyCon {argVrcs = oi}) = Just oi
+tyConArgVrcs_maybe (PrimTyCon {argVrcs = oi}) = Just oi
+tyConArgVrcs_maybe (TupleTyCon {tyConArity = arity}) = Just (replicate arity (True,False))
+tyConArgVrcs_maybe (SynTyCon {argVrcs = oi}) = Just oi
+tyConArgVrcs_maybe _ = Nothing
\end{code}
\begin{code}
projects / ghc-hetmet.git / blobdiff