import Class
import TypeRep
import Type
-import DataCon
+import PprExternalCore -- Instances
+import DataCon ( DataCon, dataConExistentialTyVars, dataConRepArgTys,
+ dataConName, dataConWrapId_maybe )
import CoreSyn
import Var
import IdInfo
-import Id( idUnfolding )
+import Id ( idUnfolding )
+import CoreTidy ( tidyExpr )
+import VarEnv ( emptyTidyEnv )
import Literal
import Name
-import CostCentre
import Outputable
import ForeignCall
-import PprExternalCore
import CmdLineOpts
-import Maybes( orElse )
+import Maybes ( mapCatMaybes )
import IO
import FastString
mkExternalCore :: ModGuts -> C.Module
+-- The ModGuts has been tidied, but the implicit bindings have
+-- not been injected, so we have to add them manually here
+-- We don't include the strange data-con *workers* because they are
+-- implicit in the data type declaration itself
mkExternalCore (ModGuts {mg_module=this_mod, mg_types = type_env, mg_binds = binds})
- = C.Module mname tdefs vdefs
+ = C.Module mname tdefs (map make_vdef all_binds)
where
mname = make_mid this_mod
tdefs = foldr collect_tdefs [] tycons
- vdefs = map make_vdef (implicit_binds ++ binds)
+
+ all_binds = implicit_con_wrappers ++ other_implicit_binds ++ binds
+ -- Put the constructor wrappers first, because
+ -- other implicit bindings (notably the fromT functions arising
+ -- from generics) use the constructor wrappers.
+
tycons = map classTyCon (typeEnvClasses type_env) ++ typeEnvTyCons type_env
- -- Don't forget to include the implicit bindings!
- implicit_binds = map get_defn (concatMap implicit_ids (typeEnvElts type_env))
+ implicit_con_wrappers = map get_defn (concatMap implicit_con_ids (typeEnvElts type_env))
+ other_implicit_binds = map get_defn (concatMap other_implicit_ids (typeEnvElts type_env))
-implicit_ids :: TyThing -> [Id]
--- C.f. HscTypes.mkImplicitBinds, but we do not include constructor workers
-implicit_ids (ATyCon tc) = map dataConWrapId (tyConDataCons_maybe tc `orElse` [])
- ++ tyConSelIds tc ++ tyConGenIds tc
-implicit_ids (AClass cl) = classSelIds cl
-implicit_ids other = []
+implicit_con_ids :: TyThing -> [Id]
+implicit_con_ids (ATyCon tc) | isAlgTyCon tc = mapCatMaybes dataConWrapId_maybe (tyConDataCons tc)
+implicit_con_ids other = []
+
+other_implicit_ids :: TyThing -> [Id]
+other_implicit_ids (ATyCon tc) = tyConSelIds tc
+other_implicit_ids (AClass cl) = classSelIds cl
+other_implicit_ids other = []
get_defn :: Id -> CoreBind
-get_defn id = NonRec id (unfoldingTemplate (idUnfolding id))
+get_defn id = NonRec id rhs
+ where
+ rhs = tidyExpr emptyTidyEnv body
+ body = unfoldingTemplate (idUnfolding id)
+ -- Don't forget to tidy the body ! Otherwise you get silly things like
+ -- \ tpl -> case tpl of tpl -> (tpl,tpl) -> tpl
+ -- Maybe we should inject these bindings during CoreTidy?
collect_tdefs :: TyCon -> [C.Tdef] -> [C.Tdef]
collect_tdefs tcon tdefs
where
tdef | isNewTyCon tcon =
C.Newtype (make_con_qid (tyConName tcon)) (map make_tbind tyvars) repclause
+ | null (tyConDataCons tcon) = error "MkExternalCore died: can't handle datatype declarations with no data constructors"
| otherwise =
C.Data (make_con_qid (tyConName tcon)) (map make_tbind tyvars) (map make_cdef (tyConDataCons tcon))
where repclause | isRecursiveTyCon tcon = Nothing
make_cdef :: DataCon -> C.Cdef
make_cdef dcon = C.Constr dcon_name existentials tys
where
- dcon_name = make_con_qid (dataConName dcon)
+ dcon_name = make_var_id (dataConName dcon)
existentials = map make_tbind ex_tyvars
ex_tyvars = dataConExistentialTyVars dcon
tys = map make_ty (dataConRepArgTys dcon)
case b of
NonRec v e -> C.Nonrec (f (v,e))
Rec ves -> C.Rec (map f ves)
- where f (v,e) = (make_var_qid (Var.varName v), make_ty (varType v),make_exp e)
+ where f (v,e) = (make_var_id (Var.varName v), make_ty (varType v),make_exp e)
+ -- Top level bindings are unqualified now
make_exp :: CoreExpr -> C.Exp
make_exp (Var v) =
FCallId (CCall (CCallSpec (StaticTarget nm) _ _)) -> C.External (unpackFS nm) (make_ty (varType v))
FCallId _ -> error "MkExternalCore died: can't handle non-static-C foreign call"
_ -> C.Var (make_var_qid (Var.varName v))
-make_exp (Lit (l@(MachLabel s))) = C.External (unpackFS s) (make_ty (literalType l))
+make_exp (Lit (l@(MachLabel s _))) = error "MkExternalCore died: can't handle \"foreign label\" declarations"
make_exp (Lit l) = C.Lit (make_lit l)
make_exp (App e (Type t)) = C.Appt (make_exp e) (make_ty t)
make_exp (App e1 e2) = C.App (make_exp e1) (make_exp e2)
make_exp (Note (SCC cc) e) = C.Note "SCC" (make_exp e) -- temporary
make_exp (Note (Coerce t_to t_from) e) = C.Coerce (make_ty t_to) (make_exp e)
make_exp (Note InlineCall e) = C.Note "InlineCall" (make_exp e)
+make_exp (Note (CoreNote s) e) = C.Note s (make_exp e) -- hdaume: core annotations
make_exp (Note InlineMe e) = C.Note "InlineMe" (make_exp e)
make_exp _ = error "MkExternalCore died: make_exp"
make_lit :: Literal -> C.Lit
make_lit l =
case l of
- MachChar i | i <= 0xff -> C.Lchar (chr i) t
- MachChar i | otherwise -> C.Lint (toEnum i) t
+ MachChar i -> C.Lchar i t
MachStr s -> C.Lstring (unpackFS s) t
- MachAddr i -> C.Lint i t
+ MachNullAddr -> C.Lint 0 t
MachInt i -> C.Lint i t
MachInt64 i -> C.Lint i t
MachWord i -> C.Lint i t
t = make_ty (literalType l)
make_ty :: Type -> C.Ty
-make_ty (TyVarTy tv) = C.Tvar (make_var_id (tyVarName tv))
-make_ty (AppTy t1 t2) = C.Tapp (make_ty t1) (make_ty t2)
-make_ty (TyConApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc))) (map make_ty ts)
-make_ty (FunTy t1 t2) = make_ty (TyConApp funTyCon [t1,t2])
-make_ty (ForAllTy tv t) = C.Tforall (make_tbind tv) (make_ty t)
-make_ty (SourceTy p) = make_ty (sourceTypeRep p)
-make_ty (NoteTy _ t) = make_ty t
+make_ty (TyVarTy tv) = C.Tvar (make_var_id (tyVarName tv))
+make_ty (AppTy t1 t2) = C.Tapp (make_ty t1) (make_ty t2)
+make_ty (FunTy t1 t2) = make_ty (TyConApp funTyCon [t1,t2])
+make_ty (ForAllTy tv t) = C.Tforall (make_tbind tv) (make_ty t)
+make_ty (TyConApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc)))
+ (map make_ty ts)
+-- The special case for newtypes says "do not expand newtypes".
+-- Reason: predTypeRep does substitution and, while substitution deals
+-- correctly with name capture, it's only correct if you see the uniques!
+-- If you just see occurrence names, name capture may occur.
+-- Example: newtype A a = A (forall b. b -> a)
+-- test :: forall q b. q -> A b
+-- test _ = undefined
+-- Here the 'a' gets substituted by 'b', which is captured.
+-- Another solution would be to expand newtypes before tidying; but that would
+-- expose the representation in interface files, which definitely isn't right.
+-- Maybe CoreTidy should know whether to expand newtypes or not?
+
+make_ty (NewTcApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc)))
+ (map make_ty ts)
+
+make_ty (PredTy p) = make_ty (predTypeRep p)
+make_ty (NoteTy _ t) = make_ty t
+
make_kind :: Kind -> C.Kind
projects / ghc-hetmet.git / blobdiff