--- | Vectorise some (possibly recursively defined) type constructors.
-vectTyConDecls :: [TyCon] -> VM [TyCon]
-vectTyConDecls tcs = fixV $ \tcs' ->
- do
- mapM_ (uncurry defTyCon) (zipLazy tcs tcs')
- mapM vectTyConDecl tcs
-
-dumpTycon :: TyCon -> VM ()
-dumpTycon tycon
- | Just cls <- tyConClass_maybe tycon
- = dtrace (vcat [ ppr tycon
- , ppr [(m, varType m) | m <- classMethods cls ]])
- $ return ()
-
- | otherwise
- = return ()
-
-
--- | Vectorise a single type construcrtor.
-vectTyConDecl :: TyCon -> VM TyCon
-vectTyConDecl tycon
- -- a type class constructor.
- -- TODO: check for no stupid theta, fds, assoc types.
- | isClassTyCon tycon
- , Just cls <- tyConClass_maybe tycon
-
- = do -- make the name of the vectorised class tycon.
- name' <- cloneName mkVectTyConOcc (tyConName tycon)
-
- -- vectorise right of definition.
- rhs' <- vectAlgTyConRhs tycon (algTyConRhs tycon)
-
- -- vectorise method selectors.
- -- This also adds a mapping between the original and vectorised method selector
- -- to the state.
- methods' <- mapM vectMethod
- $ [(id, defMethSpecOfDefMeth meth)
- | (id, meth) <- classOpItems cls]
-
- -- keep the original recursiveness flag.
- let rec_flag = boolToRecFlag (isRecursiveTyCon tycon)
-
- -- Calling buildclass here attaches new quantifiers and dictionaries to the method types.
- cls' <- liftDs
- $ buildClass
- False -- include unfoldings on dictionary selectors.
- name' -- new name V_T:Class
- (tyConTyVars tycon) -- keep original type vars
- [] -- no stupid theta
- [] -- no functional dependencies
- [] -- no associated types
- methods' -- method info
- rec_flag -- whether recursive
-
- let tycon' = mkClassTyCon name'
- (tyConKind tycon)
- (tyConTyVars tycon)
- rhs'
- cls'
- rec_flag
-
- return $ tycon'
-
- -- a regular algebraic type constructor.
- -- TODO: check for stupid theta, generaics, GADTS etc
- | isAlgTyCon tycon
- = do name' <- cloneName mkVectTyConOcc (tyConName tycon)
- rhs' <- vectAlgTyConRhs tycon (algTyConRhs tycon)
- let rec_flag = boolToRecFlag (isRecursiveTyCon tycon)
-
- liftDs $ buildAlgTyCon
- name' -- new name
- (tyConTyVars tycon) -- keep original type vars.
- [] -- no stupid theta.
- rhs' -- new constructor defs.
- rec_flag -- FIXME: is this ok?
- False -- FIXME: no generics
- False -- not GADT syntax
- Nothing -- not a family instance
-
- -- some other crazy thing that we don't handle.
- | otherwise
- = cantVectorise "Can't vectorise type constructor: " (ppr tycon)
-
-
--- | Vectorise a class method.
-vectMethod :: (Id, DefMethSpec) -> VM (Name, DefMethSpec, Type)
-vectMethod (id, defMeth)
- = do
- -- Vectorise the method type.
- typ' <- vectType (varType id)
-
- -- Create a name for the vectorised method.
- id' <- cloneId mkVectOcc id typ'
- defGlobalVar id id'
-
- -- When we call buildClass in vectTyConDecl, it adds foralls and dictionaries
- -- to the types of each method. However, the types we get back from vectType
- -- above already already have these, so we need to chop them off here otherwise
- -- we'll get two copies in the final version.
- let (_tyvars, tyBody) = splitForAllTys typ'
- let (_dict, tyRest) = splitFunTy tyBody
-
- return (Var.varName id', defMeth, tyRest)
-
-
--- | Vectorise the RHS of an algebraic type.
-vectAlgTyConRhs :: TyCon -> AlgTyConRhs -> VM AlgTyConRhs
-vectAlgTyConRhs _ (DataTyCon { data_cons = data_cons
- , is_enum = is_enum
- })
- = do
- data_cons' <- mapM vectDataCon data_cons
- zipWithM_ defDataCon data_cons data_cons'
- return $ DataTyCon { data_cons = data_cons'
- , is_enum = is_enum
- }
-
-vectAlgTyConRhs tc _
- = cantVectorise "Can't vectorise type definition:" (ppr tc)
-
-
--- | Vectorise a data constructor.
--- Vectorises its argument and return types.
-vectDataCon :: DataCon -> VM DataCon
-vectDataCon dc
- | not . null $ dataConExTyVars dc
- = cantVectorise "Can't vectorise constructor (existentials):" (ppr dc)
-
- | not . null $ dataConEqSpec dc
- = cantVectorise "Can't vectorise constructor (eq spec):" (ppr dc)
-
- | otherwise
- = do
- name' <- cloneName mkVectDataConOcc name
- tycon' <- vectTyCon tycon
- arg_tys <- mapM vectType rep_arg_tys
-
- liftDs $ buildDataCon
- name'
- False -- not infix
- (map (const HsNoBang) arg_tys) -- strictness annots on args.
- [] -- no labelled fields
- univ_tvs -- universally quantified vars
- [] -- no existential tvs for now
- [] -- no eq spec for now
- [] -- no context
- arg_tys -- argument types
- (mkFamilyTyConApp tycon' (mkTyVarTys univ_tvs)) -- return type
- tycon' -- representation tycon
- where
- name = dataConName dc
- univ_tvs = dataConUnivTyVars dc
- rep_arg_tys = dataConRepArgTys dc
- tycon = dataConTyCon dc
-