import TysWiredIn
import DataCon
import Name
+import NameSet
import Var
import VarSet
import VarEnv
import BasicTypes
import Maybes
import SrcLoc
+import DynFlags( DynFlag(..) )
import Bag
+import FastString
import Outputable
\end{code}
hsPatType (ParPat pat) = hsLPatType pat
hsPatType (WildPat ty) = ty
hsPatType (VarPat var) = idType var
-hsPatType (VarPatOut var _) = idType var
hsPatType (BangPat pat) = hsLPatType pat
hsPatType (LazyPat pat) = hsLPatType pat
hsPatType (LitPat lit) = hsLitType lit
zonkTopLExpr :: LHsExpr TcId -> TcM (LHsExpr Id)
zonkTopLExpr e = zonkLExpr emptyZonkEnv e
-zonkTopDecls :: Bag EvBind -> LHsBinds TcId -> [LRuleDecl TcId] -> [LForeignDecl TcId]
+zonkTopDecls :: Bag EvBind
+ -> LHsBinds TcId -> NameSet
+ -> [LRuleDecl TcId] -> [LTcSpecPrag] -> [LForeignDecl TcId]
-> TcM ([Id],
Bag EvBind,
Bag (LHsBind Id),
[LForeignDecl Id],
+ [LTcSpecPrag],
[LRuleDecl Id])
-zonkTopDecls ev_binds binds rules fords
+zonkTopDecls ev_binds binds sig_ns rules imp_specs fords
= do { (env1, ev_binds') <- zonkEvBinds emptyZonkEnv ev_binds
- ; (env2, binds') <- zonkRecMonoBinds env1 binds
+ -- Warn about missing signatures
+ -- Do this only when we we have a type to offer
+ ; warn_missing_sigs <- doptM Opt_WarnMissingSigs
+ ; let sig_warn | warn_missing_sigs = topSigWarn sig_ns
+ | otherwise = noSigWarn
+
+ ; (env2, binds') <- zonkRecMonoBinds env1 sig_warn binds
-- Top level is implicitly recursive
; rules' <- zonkRules env2 rules
+ ; specs' <- zonkLTcSpecPrags env2 imp_specs
; fords' <- zonkForeignExports env2 fords
- ; return (zonkEnvIds env2, ev_binds', binds', fords', rules') }
+ ; return (zonkEnvIds env2, ev_binds', binds', fords', specs', rules') }
---------------------------------------------
zonkLocalBinds :: ZonkEnv -> HsLocalBinds TcId -> TcM (ZonkEnv, HsLocalBinds Id)
zonkLocalBinds env EmptyLocalBinds
= return (env, EmptyLocalBinds)
-zonkLocalBinds env (HsValBinds binds)
- = do { (env1, new_binds) <- zonkValBinds env binds
- ; return (env1, HsValBinds new_binds) }
+zonkLocalBinds _ (HsValBinds (ValBindsIn {}))
+ = panic "zonkLocalBinds" -- Not in typechecker output
+
+zonkLocalBinds env (HsValBinds vb@(ValBindsOut binds sigs))
+ = do { warn_missing_sigs <- doptM Opt_WarnMissingLocalSigs
+ ; let sig_warn | not warn_missing_sigs = noSigWarn
+ | otherwise = localSigWarn sig_ns
+ sig_ns = getTypeSigNames vb
+ ; (env1, new_binds) <- go env sig_warn binds
+ ; return (env1, HsValBinds (ValBindsOut new_binds sigs)) }
+ where
+ go env _ []
+ = return (env, [])
+ go env sig_warn ((r,b):bs)
+ = do { (env1, b') <- zonkRecMonoBinds env sig_warn b
+ ; (env2, bs') <- go env1 sig_warn bs
+ ; return (env2, (r,b'):bs') }
zonkLocalBinds env (HsIPBinds (IPBinds binds dict_binds))
= mappM (wrapLocM zonk_ip_bind) binds `thenM` \ new_binds ->
zonkLExpr env e `thenM` \ e' ->
returnM (IPBind n' e')
-
----------------------------------------------
-zonkValBinds :: ZonkEnv -> HsValBinds TcId -> TcM (ZonkEnv, HsValBinds Id)
-zonkValBinds _ (ValBindsIn _ _)
- = panic "zonkValBinds" -- Not in typechecker output
-zonkValBinds env (ValBindsOut binds sigs)
- = do { (env1, new_binds) <- go env binds
- ; return (env1, ValBindsOut new_binds sigs) }
- where
- go env [] = return (env, [])
- go env ((r,b):bs) = do { (env1, b') <- zonkRecMonoBinds env b
- ; (env2, bs') <- go env1 bs
- ; return (env2, (r,b'):bs') }
-
---------------------------------------------
-zonkRecMonoBinds :: ZonkEnv -> LHsBinds TcId -> TcM (ZonkEnv, LHsBinds Id)
-zonkRecMonoBinds env binds
+zonkRecMonoBinds :: ZonkEnv -> SigWarn -> LHsBinds TcId -> TcM (ZonkEnv, LHsBinds Id)
+zonkRecMonoBinds env sig_warn binds
= fixM (\ ~(_, new_binds) -> do
{ let env1 = extendZonkEnv env (collectHsBindsBinders new_binds)
- ; binds' <- zonkMonoBinds env1 binds
+ ; binds' <- zonkMonoBinds env1 sig_warn binds
; return (env1, binds') })
---------------------------------------------
-zonkMonoBinds :: ZonkEnv -> LHsBinds TcId -> TcM (LHsBinds Id)
-zonkMonoBinds env binds = mapBagM (wrapLocM (zonk_bind env)) binds
+type SigWarn = Bool -> [Id] -> TcM ()
+ -- Missing-signature warning
+ -- The Bool is True for an AbsBinds, False otherwise
+
+noSigWarn :: SigWarn
+noSigWarn _ _ = return ()
+
+topSigWarn :: NameSet -> SigWarn
+topSigWarn sig_ns _ ids = mapM_ (topSigWarnId sig_ns) ids
+
+topSigWarnId :: NameSet -> Id -> TcM ()
+-- The NameSet is the Ids that *lack* a signature
+-- We have to do it this way round because there are
+-- lots of top-level bindings that are generated by GHC
+-- and that don't have signatures
+topSigWarnId sig_ns id
+ | idName id `elemNameSet` sig_ns = warnMissingSig msg id
+ | otherwise = return ()
+ where
+ msg = ptext (sLit "Top-level binding with no type signature:")
+
+localSigWarn :: NameSet -> SigWarn
+localSigWarn sig_ns is_abs_bind ids
+ | not is_abs_bind = return ()
+ | otherwise = mapM_ (localSigWarnId sig_ns) ids
+
+localSigWarnId :: NameSet -> Id -> TcM ()
+-- NameSet are the Ids that *have* type signatures
+localSigWarnId sig_ns id
+ | not (isSigmaTy (idType id)) = return ()
+ | idName id `elemNameSet` sig_ns = return ()
+ | otherwise = warnMissingSig msg id
+ where
+ msg = ptext (sLit "Polymophic local binding with no type signature:")
+
+warnMissingSig :: SDoc -> Id -> TcM ()
+warnMissingSig msg id
+ = do { env0 <- tcInitTidyEnv
+ ; let (env1, tidy_ty) = tidyOpenType env0 (idType id)
+ ; addWarnTcM (env1, mk_msg tidy_ty) }
+ where
+ mk_msg ty = sep [ msg, nest 2 $ pprHsVar (idName id) <+> dcolon <+> ppr ty ]
+
+---------------------------------------------
+zonkMonoBinds :: ZonkEnv -> SigWarn -> LHsBinds TcId -> TcM (LHsBinds Id)
+zonkMonoBinds env sig_warn binds = mapBagM (wrapLocM (zonk_bind env sig_warn)) binds
-zonk_bind :: ZonkEnv -> HsBind TcId -> TcM (HsBind Id)
-zonk_bind env bind@(PatBind { pat_lhs = pat, pat_rhs = grhss, pat_rhs_ty = ty})
+zonk_bind :: ZonkEnv -> SigWarn -> HsBind TcId -> TcM (HsBind Id)
+zonk_bind env sig_warn bind@(PatBind { pat_lhs = pat, pat_rhs = grhss, pat_rhs_ty = ty})
= do { (_env, new_pat) <- zonkPat env pat -- Env already extended
+ ; sig_warn False (collectPatBinders new_pat)
; new_grhss <- zonkGRHSs env grhss
; new_ty <- zonkTcTypeToType env ty
; return (bind { pat_lhs = new_pat, pat_rhs = new_grhss, pat_rhs_ty = new_ty }) }
-zonk_bind env (VarBind { var_id = var, var_rhs = expr, var_inline = inl })
- = zonkIdBndr env var `thenM` \ new_var ->
- zonkLExpr env expr `thenM` \ new_expr ->
- returnM (VarBind { var_id = new_var, var_rhs = new_expr, var_inline = inl })
-
-zonk_bind env bind@(FunBind { fun_id = var, fun_matches = ms
- , fun_co_fn = co_fn })
- = wrapLocM (zonkIdBndr env) var `thenM` \ new_var ->
- zonkCoFn env co_fn `thenM` \ (env1, new_co_fn) ->
- zonkMatchGroup env1 ms `thenM` \ new_ms ->
- returnM (bind { fun_id = new_var, fun_matches = new_ms
- , fun_co_fn = new_co_fn })
-
-zonk_bind env (AbsBinds { abs_tvs = tyvars, abs_ev_vars = evs, abs_ev_binds = ev_binds,
- abs_exports = exports, abs_binds = val_binds })
+zonk_bind env sig_warn (VarBind { var_id = var, var_rhs = expr, var_inline = inl })
+ = do { new_var <- zonkIdBndr env var
+ ; sig_warn False [new_var]
+ ; new_expr <- zonkLExpr env expr
+ ; return (VarBind { var_id = new_var, var_rhs = new_expr, var_inline = inl }) }
+
+zonk_bind env sig_warn bind@(FunBind { fun_id = L loc var, fun_matches = ms
+ , fun_co_fn = co_fn })
+ = do { new_var <- zonkIdBndr env var
+ ; sig_warn False [new_var]
+ ; (env1, new_co_fn) <- zonkCoFn env co_fn
+ ; new_ms <- zonkMatchGroup env1 ms
+ ; return (bind { fun_id = L loc new_var, fun_matches = new_ms
+ , fun_co_fn = new_co_fn }) }
+
+zonk_bind env sig_warn (AbsBinds { abs_tvs = tyvars, abs_ev_vars = evs
+ , abs_ev_binds = ev_binds
+ , abs_exports = exports
+ , abs_binds = val_binds })
= ASSERT( all isImmutableTyVar tyvars )
do { (env1, new_evs) <- zonkEvBndrsX env evs
; (env2, new_ev_binds) <- zonkTcEvBinds env1 ev_binds
; (new_val_bind, new_exports) <- fixM $ \ ~(new_val_binds, _) ->
do { let env3 = extendZonkEnv env2 (collectHsBindsBinders new_val_binds)
- ; new_val_binds <- zonkMonoBinds env3 val_binds
+ ; new_val_binds <- zonkMonoBinds env3 noSigWarn val_binds
; new_exports <- mapM (zonkExport env3) exports
; return (new_val_binds, new_exports) }
+ ; sig_warn True [b | (_,b,_,_) <- new_exports]
; return (AbsBinds { abs_tvs = tyvars, abs_ev_vars = new_evs, abs_ev_binds = new_ev_binds
, abs_exports = new_exports, abs_binds = new_val_bind }) }
where
zonkSpecPrags :: ZonkEnv -> TcSpecPrags -> TcM TcSpecPrags
zonkSpecPrags _ IsDefaultMethod = return IsDefaultMethod
-zonkSpecPrags env (SpecPrags ps) = do { ps' <- mapM zonk_prag ps
+zonkSpecPrags env (SpecPrags ps) = do { ps' <- zonkLTcSpecPrags env ps
; return (SpecPrags ps') }
+
+zonkLTcSpecPrags :: ZonkEnv -> [LTcSpecPrag] -> TcM [LTcSpecPrag]
+zonkLTcSpecPrags env ps
+ = mapM zonk_prag ps
where
- zonk_prag (L loc (SpecPrag co_fn inl))
+ zonk_prag (L loc (SpecPrag id co_fn inl))
= do { (_, co_fn') <- zonkCoFn env co_fn
- ; return (L loc (SpecPrag co_fn' inl)) }
+ ; return (L loc (SpecPrag (zonkIdOcc env id) co_fn' inl)) }
\end{code}
%************************************************************************
= zonkLExpr env e `thenM` \new_e ->
returnM (HsPar new_e)
+zonkExpr env (HsHetMetBrak c e)
+ = do c' <- zonkTcTypeToType env c
+ e' <- zonkLExpr env e
+ return (HsHetMetBrak c' e')
+
+zonkExpr env (HsHetMetEsc c t e)
+ = do c' <- zonkTcTypeToType env c
+ t' <- zonkTcTypeToType env t
+ e' <- zonkLExpr env e
+ return (HsHetMetEsc c' t' e')
+
+zonkExpr env (HsHetMetCSP c e)
+ = do c' <- zonkTcTypeToType env c
+ e' <- zonkLExpr env e
+ return (HsHetMetCSP c' e')
+
zonkExpr env (SectionL expr op)
= zonkLExpr env expr `thenM` \ new_expr ->
zonkLExpr env op `thenM` \ new_op ->
zonkMatchGroup env ms `thenM` \ new_ms ->
returnM (HsCase new_expr new_ms)
-zonkExpr env (HsIf e1 e2 e3)
- = zonkLExpr env e1 `thenM` \ new_e1 ->
- zonkLExpr env e2 `thenM` \ new_e2 ->
- zonkLExpr env e3 `thenM` \ new_e3 ->
- returnM (HsIf new_e1 new_e2 new_e3)
+zonkExpr env (HsIf e0 e1 e2 e3)
+ = do { new_e0 <- fmapMaybeM (zonkExpr env) e0
+ ; new_e1 <- zonkLExpr env e1
+ ; new_e2 <- zonkLExpr env e2
+ ; new_e3 <- zonkLExpr env e3
+ ; returnM (HsIf new_e0 new_e1 new_e2 new_e3) }
zonkExpr env (HsLet binds expr)
= zonkLocalBinds env binds `thenM` \ (new_env, new_binds) ->
= zonkStmts env stmts `thenM` \ (new_env, new_stmts) ->
zonkLExpr new_env body `thenM` \ new_body ->
zonkTcTypeToType env ty `thenM` \ new_ty ->
- zonkDo env do_or_lc `thenM` \ new_do_or_lc ->
- returnM (HsDo new_do_or_lc new_stmts new_body new_ty)
+ returnM (HsDo do_or_lc new_stmts new_body new_ty)
zonkExpr env (ExplicitList ty exprs)
= zonkTcTypeToType env ty `thenM` \ new_ty ->
; return (env1, WpLet bs') }
-------------------------------------------------------------------------
-zonkDo :: ZonkEnv -> HsStmtContext Name -> TcM (HsStmtContext Name)
--- Only used for 'do', so the only Ids are in a MDoExpr table
-zonkDo env (MDoExpr tbl) = do { tbl' <- mapSndM (zonkExpr env) tbl
- ; return (MDoExpr tbl') }
-zonkDo _ do_or_lc = return do_or_lc
-
--------------------------------------------------------------------------
zonkOverLit :: ZonkEnv -> HsOverLit TcId -> TcM (HsOverLit Id)
zonkOverLit env lit@(OverLit { ol_witness = e, ol_type = ty })
= do { ty' <- zonkTcTypeToType env ty
zonkStmt env (RecStmt { recS_stmts = segStmts, recS_later_ids = lvs, recS_rec_ids = rvs
, recS_ret_fn = ret_id, recS_mfix_fn = mfix_id, recS_bind_fn = bind_id
- , recS_rec_rets = rets, recS_dicts = binds })
+ , recS_rec_rets = rets })
= do { new_rvs <- zonkIdBndrs env rvs
; new_lvs <- zonkIdBndrs env lvs
; new_ret_id <- zonkExpr env ret_id
-- Zonk the ret-expressions in an envt that
-- has the polymorphic bindings in the envt
; new_rets <- mapM (zonkExpr env2) rets
- ; let env3 = extendZonkEnv env new_lvs -- Only the lvs are needed
- ; (env4, new_binds) <- zonkTcEvBinds env3 binds
- ; return (env4,
+ ; return (extendZonkEnv env new_lvs, -- Only the lvs are needed
RecStmt { recS_stmts = new_segStmts, recS_later_ids = new_lvs
, recS_rec_ids = new_rvs, recS_ret_fn = new_ret_id
, recS_mfix_fn = new_mfix_id, recS_bind_fn = new_bind_id
- , recS_rec_rets = new_rets, recS_dicts = new_binds }) }
+ , recS_rec_rets = new_rets }) }
zonkStmt env (ExprStmt expr then_op ty)
= zonkLExpr env expr `thenM` \ new_expr ->
= do { v' <- zonkIdBndr env v
; return (extendZonkEnv1 env v', VarPat v') }
-zonk_pat env (VarPatOut v binds)
- = do { v' <- zonkIdBndr env v
- ; (env', binds') <- zonkTcEvBinds (extendZonkEnv1 env v') binds
- ; returnM (env', VarPatOut v' binds') }
-
zonk_pat env (LazyPat pat)
= do { (env', pat') <- zonkPat env pat
; return (env', LazyPat pat') }
zonk_pat env (NPat lit mb_neg eq_expr)
= do { lit' <- zonkOverLit env lit
- ; mb_neg' <- case mb_neg of
- Nothing -> return Nothing
- Just neg -> do { neg' <- zonkExpr env neg
- ; return (Just neg') }
+ ; mb_neg' <- fmapMaybeM (zonkExpr env) mb_neg
; eq_expr' <- zonkExpr env eq_expr
; return (env, NPat lit' mb_neg' eq_expr') }
do { co' <- zonkTcTypeToType env co
; return (EvCast (zonkIdOcc env v) co') }
zonkEvTerm env (EvSuperClass d n) = return (EvSuperClass (zonkIdOcc env d) n)
-zonkEvTerm env (EvDFunApp df tys tms)
+zonkEvTerm env (EvDFunApp df tys tms)
= do { tys' <- zonkTcTypeToTypes env tys
; let tms' = map (zonkEvVarOcc env) tms
; return (EvDFunApp (zonkIdOcc env df) tys' tms') }
%************************************************************************
%* *
-\subsection[BackSubst-Foreign]{Foreign exports}
+ Zonking types
%* *
%************************************************************************
= zonkType (mkZonkTcTyVar zonk_unbound_tyvar)
where
zonk_unbound_tyvar tv
- = do { tv' <- zonkQuantifiedTyVar tv
+ = do { tv' <- zonkQuantifiedTyVar tv
; tv_set <- readMutVar unbound_tv_set
; writeMutVar unbound_tv_set (extendVarSet tv_set tv')
; return (mkTyVarTy tv') }
projects / ghc-hetmet.git / blobdiff