module RnSource (
rnSrcDecls, addTcgDUs,
rnTyClDecls, checkModDeprec,
- rnBindGroups, rnBindGroupsAndThen, rnSplice
+ rnSplice, checkTH
) where
#include "HsVersions.h"
+import {-# SOURCE #-} RnExpr( rnLExpr )
+
import HsSyn
-import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, elemLocalRdrEnv )
-import RdrHsSyn ( extractGenericPatTyVars )
+import RdrName ( RdrName, isRdrDataCon, elemLocalRdrEnv )
+import RdrHsSyn ( extractGenericPatTyVars, extractHsRhoRdrTyVars )
import RnHsSyn
-import RnExpr ( rnLExpr, checkTH )
import RnTypes ( rnLHsType, rnLHsTypes, rnHsSigType, rnHsTypeFVs, rnContext )
-import RnBinds ( rnTopBinds, rnBinds, rnMethodBinds,
- rnBindsAndThen, renameSigs, checkSigs )
-import RnEnv ( lookupTopBndrRn, lookupLocalDataTcNames,
+import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs )
+import RnEnv ( lookupLocalDataTcNames,
lookupLocatedTopBndrRn, lookupLocatedOccRn,
lookupOccRn, newLocalsRn,
bindLocatedLocalsFV, bindPatSigTyVarsFV,
bindTyVarsRn, extendTyVarEnvFVRn,
- bindLocalNames, newIPNameRn,
- checkDupNames, mapFvRn,
- unknownNameErr
+ bindLocalNames, checkDupNames, mapFvRn
)
import TcRnMonad
-import BasicTypes ( TopLevelFlag(..) )
import HscTypes ( FixityEnv, FixItem(..),
Deprecations, Deprecs(..), DeprecTxt, plusDeprecs )
import Class ( FunDep )
import SrcLoc ( Located(..), unLoc, getLoc, noLoc )
import DynFlags ( DynFlag(..) )
import Maybes ( seqMaybe )
-import Maybe ( catMaybes, isNothing )
+import Maybe ( isNothing )
+import BasicTypes ( Boxity(..) )
\end{code}
@rnSourceDecl@ `renames' declarations.
\begin{code}
rnSrcDecls :: HsGroup RdrName -> RnM (TcGblEnv, HsGroup Name)
-rnSrcDecls (HsGroup { hs_valds = [HsBindGroup binds sigs _],
+rnSrcDecls (HsGroup { hs_valds = val_decls,
hs_tyclds = tycl_decls,
hs_instds = inst_decls,
hs_fixds = fix_decls,
-- Rename other declarations
traceRn (text "Start rnmono") ;
- (rn_val_decls, bind_dus) <- rnTopBinds binds sigs ;
+ (rn_val_decls, bind_dus) <- rnTopBinds val_decls ;
traceRn (text "finish rnmono" <+> ppr rn_val_decls) ;
-- You might think that we could build proper def/use information
%*********************************************************
%* *
- Bindings
-%* *
-%*********************************************************
-
-These chaps are here, rather than in TcBinds, so that there
-is just one hi-boot file (for RnSource). rnSrcDecls is part
-of the loop too, and it must be defined in this module.
-
-\begin{code}
-rnBindGroups :: [HsBindGroup RdrName] -> RnM ([HsBindGroup Name], DefUses)
--- This version assumes that the binders are already in scope
--- It's used only in 'mdo'
-rnBindGroups []
- = returnM ([], emptyDUs)
-rnBindGroups [HsBindGroup bind sigs _]
- = rnBinds NotTopLevel bind sigs
-rnBindGroups b@[HsIPBinds bind]
- = do addErr (badIpBinds b)
- returnM ([], emptyDUs)
-rnBindGroups _
- = panic "rnBindGroups"
-
-rnBindGroupsAndThen
- :: [HsBindGroup RdrName]
- -> ([HsBindGroup Name] -> RnM (result, FreeVars))
- -> RnM (result, FreeVars)
--- This version (a) assumes that the binding vars are not already in scope
--- (b) removes the binders from the free vars of the thing inside
--- The parser doesn't produce ThenBinds
-rnBindGroupsAndThen [] thing_inside
- = thing_inside []
-rnBindGroupsAndThen [HsBindGroup bind sigs _] thing_inside
- = rnBindsAndThen bind sigs $ \ groups -> thing_inside groups
-rnBindGroupsAndThen [HsIPBinds binds] thing_inside
- = rnIPBinds binds `thenM` \ (binds',fv_binds) ->
- thing_inside [HsIPBinds binds'] `thenM` \ (thing, fvs_thing) ->
- returnM (thing, fvs_thing `plusFV` fv_binds)
-
-rnIPBinds [] = returnM ([], emptyFVs)
-rnIPBinds (bind : binds)
- = wrapLocFstM rnIPBind bind `thenM` \ (bind', fvBind) ->
- rnIPBinds binds `thenM` \ (binds',fvBinds) ->
- returnM (bind' : binds', fvBind `plusFV` fvBinds)
-
-rnIPBind (IPBind n expr)
- = newIPNameRn n `thenM` \ name ->
- rnLExpr expr `thenM` \ (expr',fvExpr) ->
- return (IPBind name expr', fvExpr)
-
-badIpBinds binds
- = hang (ptext SLIT("Implicit-parameter bindings illegal in 'mdo':")) 4
- (ppr binds)
-\end{code}
-
-
-%*********************************************************
-%* *
\subsection{Foreign declarations}
%* *
%*********************************************************
-- But the (unqualified) method names are in scope
let
binders = collectHsBindBinders mbinds'
+ ok_sig = okInstDclSig (mkNameSet binders)
in
- bindLocalNames binders (renameSigs uprags) `thenM` \ uprags' ->
- checkSigs (okInstDclSig (mkNameSet binders)) uprags' `thenM_`
+ bindLocalNames binders (renameSigs ok_sig uprags) `thenM` \ uprags' ->
returnM (InstDecl inst_ty' mbinds' uprags',
meth_fvs `plusFV` hsSigsFVs uprags'
deriv_fvs) }
| otherwise -- GADT
- = ASSERT( null (unLoc context) )
- do { tycon' <- lookupLocatedTopBndrRn tycon
- ; tyvars' <- bindTyVarsRn data_doc tyvars
+ = do { tycon' <- lookupLocatedTopBndrRn tycon
+ ; checkTc (null (unLoc context)) (badGadtStupidTheta tycon)
+ ; tyvars' <- bindTyVarsRn data_doc tyvars
(\ tyvars' -> return tyvars')
-- For GADTs, the type variables in the declaration
-- do not scope over the constructor signatures
where
is_vanilla = case condecls of -- Yuk
[] -> True
- L _ (ConDecl {}) : _ -> True
+ L _ (ConDecl { con_res = ResTyH98 }) : _ -> True
other -> False
data_doc = text "In the data type declaration for" <+> quotes (ppr tycon)
con_names = map con_names_helper condecls
- con_names_helper (L _ (ConDecl n _ _ _)) = n
- con_names_helper (L _ (GadtDecl n _)) = n
+ con_names_helper (L _ c) = con_name c
rn_derivs Nothing = returnM (Nothing, emptyFVs)
rn_derivs (Just ds) = rnLHsTypes data_doc ds `thenM` \ ds' ->
bindTyVarsRn cls_doc tyvars ( \ tyvars' ->
rnContext cls_doc context `thenM` \ context' ->
rnFds cls_doc fds `thenM` \ fds' ->
- renameSigs sigs `thenM` \ sigs' ->
+ renameSigs okClsDclSig sigs `thenM` \ sigs' ->
returnM (tyvars', context', fds', sigs')
) `thenM` \ (tyvars', context', fds', sigs') ->
sig_rdr_names_w_locs = [op | L _ (Sig op _) <- sigs]
in
checkDupNames sig_doc sig_rdr_names_w_locs `thenM_`
- checkSigs okClsDclSig sigs' `thenM_`
-- Typechecker is responsible for checking that we only
-- give default-method bindings for things in this class.
-- The renamer *could* check this for class decls, but can't
meth_doc = text "In the default-methods for class" <+> ppr cname
cls_doc = text "In the declaration for class" <+> ppr cname
sig_doc = text "In the signatures for class" <+> ppr cname
+
+badGadtStupidTheta tycon
+ = vcat [ptext SLIT("No context is allowed on a GADT-style data declaration"),
+ ptext SLIT("(You can put a context on each contructor, though.)")]
\end{code}
%*********************************************************
= mappM (wrapLocM rnConDecl) condecls
rnConDecl :: ConDecl RdrName -> RnM (ConDecl Name)
-rnConDecl (ConDecl name tvs cxt details)
- = addLocM checkConName name `thenM_`
- lookupLocatedTopBndrRn name `thenM` \ new_name ->
-
- bindTyVarsRn doc tvs $ \ new_tyvars ->
- rnContext doc cxt `thenM` \ new_context ->
- rnConDetails doc details `thenM` \ new_details ->
- returnM (ConDecl new_name new_tyvars new_context new_details)
- where
- doc = text "In the definition of data constructor" <+> quotes (ppr name)
+rnConDecl (ConDecl name expl tvs cxt details res_ty)
+ = do { addLocM checkConName name
-rnConDecl (GadtDecl name ty)
- = addLocM checkConName name `thenM_`
- lookupLocatedTopBndrRn name `thenM` \ new_name ->
- rnHsSigType doc ty `thenM` \ new_ty ->
- returnM (GadtDecl new_name new_ty)
+ ; new_name <- lookupLocatedTopBndrRn name
+ ; name_env <- getLocalRdrEnv
+
+ -- For H98 syntax, the tvs are the existential ones
+ -- For GADT syntax, the tvs are all the quantified tyvars
+ -- Hence the 'filter' in the ResTyH98 case only
+ ; let not_in_scope = not . (`elemLocalRdrEnv` name_env) . unLoc
+ arg_tys = hsConArgs details
+ implicit_tvs = case res_ty of
+ ResTyH98 -> filter not_in_scope $
+ get_rdr_tvs arg_tys
+ ResTyGADT ty -> get_rdr_tvs (ty : arg_tys)
+ tvs' = case expl of
+ Explicit -> tvs
+ Implicit -> userHsTyVarBndrs implicit_tvs
+
+ ; bindTyVarsRn doc tvs' $ \new_tyvars -> do
+ { new_context <- rnContext doc cxt
+ ; new_details <- rnConDetails doc details
+ ; new_res_ty <- rnConResult doc res_ty
+ ; let rv = ConDecl new_name expl new_tyvars new_context new_details new_res_ty
+ ; traceRn (text "****** - autrijus" <> ppr rv)
+ ; return rv } }
where
doc = text "In the definition of data constructor" <+> quotes (ppr name)
+ get_rdr_tvs tys = extractHsRhoRdrTyVars cxt (noLoc (HsTupleTy Boxed tys))
+
+rnConResult _ ResTyH98 = return ResTyH98
+rnConResult doc (ResTyGADT ty) = do
+ ty' <- rnHsSigType doc ty
+ return $ ResTyGADT ty'
rnConDetails doc (PrefixCon tys)
= mappM (rnLHsType doc) tys `thenM` \ new_tys ->
newLocalsRn [L loc n] `thenM` \ [n'] ->
rnLExpr expr `thenM` \ (expr', fvs) ->
returnM (HsSplice n' expr', fvs)
+
+#ifdef GHCI
+checkTH e what = returnM () -- OK
+#else
+checkTH e what -- Raise an error in a stage-1 compiler
+ = addErr (vcat [ptext SLIT("Template Haskell") <+> text what <+>
+ ptext SLIT("illegal in a stage-1 compiler"),
+ nest 2 (ppr e)])
+#endif
\end{code}
projects / ghc-hetmet.git / blobdiff