\begin{code}
module RnSource (
rnSrcDecls, addTcgDUs,
- rnTyClDecls, checkModDeprec,
+ rnTyClDecls,
rnSplice, checkTH
) where
import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs, mkSigTvFn )
import RnEnv ( lookupLocalDataTcNames,
lookupLocatedTopBndrRn, lookupLocatedOccRn,
- lookupOccRn, lookupTopBndrRn, newLocalsRn,
+ lookupOccRn, newLocalsRn,
bindLocatedLocalsFV, bindPatSigTyVarsFV,
bindTyVarsRn, extendTyVarEnvFVRn,
bindLocalNames, checkDupNames, mapFvRn
import RnHsDoc ( rnHsDoc, rnMbLHsDoc )
import TcRnMonad
-import HscTypes ( FixityEnv, FixItem(..),
- Deprecations, Deprecs(..), DeprecTxt, plusDeprecs )
+import HscTypes ( FixityEnv, FixItem(..), Deprecations, Deprecs(..), plusDeprecs )
import Class ( FunDep )
import Name ( Name, nameOccName )
import NameSet
import SrcLoc ( Located(..), unLoc, noLoc )
import DynFlags ( DynFlag(..) )
import Maybes ( seqMaybe )
-import Maybe ( isNothing, isJust )
+import Maybe ( isNothing )
import Monad ( liftM, when )
import BasicTypes ( Boxity(..) )
\end{code}
hs_fords = foreign_decls,
hs_defds = default_decls,
hs_ruleds = rule_decls,
- hs_docs = docs })
+ hs_docs = docs })
= do { -- Deal with deprecations (returns only the extra deprecations)
deprecs <- rnSrcDeprecDecls deprec_decls ;
-- means we'll only report a declaration as unused if it isn't
-- mentioned at all. Ah well.
traceRn (text "Start rnTyClDecls") ;
- (rn_tycl_decls, src_fvs1)
- <- mapFvRn (wrapLocFstM rnTyClDecl) tycl_decls ;
- traceRn (text "finish rnTyClDecls") ;
- (rn_inst_decls, src_fvs2)
- <- mapFvRn (wrapLocFstM rnSrcInstDecl) inst_decls ;
- (rn_deriv_decls, src_fvs_deriv)
- <- mapFvRn (wrapLocFstM rnSrcDerivDecl) deriv_decls ;
- (rn_rule_decls, src_fvs3)
- <- mapFvRn (wrapLocFstM rnHsRuleDecl) rule_decls ;
- (rn_foreign_decls, src_fvs4)
- <- mapFvRn (wrapLocFstM rnHsForeignDecl) foreign_decls ;
- (rn_default_decls, src_fvs5)
- <- mapFvRn (wrapLocFstM rnDefaultDecl) default_decls ;
-
- rn_docs <- rnDocEntities docs ;
+ (rn_tycl_decls, src_fvs1) <- rnList rnTyClDecl tycl_decls ;
+ (rn_inst_decls, src_fvs2) <- rnList rnSrcInstDecl inst_decls ;
+ (rn_rule_decls, src_fvs3) <- rnList rnHsRuleDecl rule_decls ;
+ (rn_foreign_decls, src_fvs4) <- rnList rnHsForeignDecl foreign_decls ;
+ (rn_default_decls, src_fvs5) <- rnList rnDefaultDecl default_decls ;
+ (rn_deriv_decls, src_fvs6) <- rnList rnSrcDerivDecl deriv_decls ;
+
+ -- Haddock docs; no free vars
+ rn_docs <- mapM (wrapLocM rnDocDecl) docs ;
let {
rn_group = HsGroup { hs_valds = rn_val_decls,
hs_fords = rn_foreign_decls,
hs_defds = rn_default_decls,
hs_ruleds = rn_rule_decls,
- hs_docs = rn_docs } ;
+ hs_docs = rn_docs } ;
- other_fvs = plusFVs [src_fvs1, src_fvs2, src_fvs_deriv, src_fvs3,
+ other_fvs = plusFVs [src_fvs1, src_fvs2, src_fvs6, src_fvs3,
src_fvs4, src_fvs5] ;
src_dus = bind_dus `plusDU` usesOnly other_fvs
-- Note: src_dus will contain *uses* for locally-defined types
}}}
rnTyClDecls :: [LTyClDecl RdrName] -> RnM [LTyClDecl Name]
-rnTyClDecls tycl_decls = do
- (decls', fvs) <- mapFvRn (wrapLocFstM rnTyClDecl) tycl_decls
- return decls'
+-- Used for external core
+rnTyClDecls tycl_decls = do (decls', fvs) <- rnList rnTyClDecl tycl_decls
+ return decls'
addTcgDUs :: TcGblEnv -> DefUses -> TcGblEnv
addTcgDUs tcg_env dus = tcg_env { tcg_dus = tcg_dus tcg_env `plusDU` dus }
+
+rnList :: (a -> RnM (b, FreeVars)) -> [Located a] -> RnM ([Located b], FreeVars)
+rnList f xs = mapFvRn (wrapLocFstM f) xs
\end{code}
%*********************************************************
\begin{code}
-rnDocEntities :: [DocEntity RdrName] -> RnM [DocEntity Name]
-rnDocEntities ents
- = ifErrsM (return []) $
- -- Yuk: stop if we have found errors. Otherwise
- -- the rnDocEntity stuff reports the errors again.
- mapM rnDocEntity ents
-
-rnDocEntity :: DocEntity RdrName -> RnM (DocEntity Name)
-rnDocEntity (DocEntity docdecl) = do
- rn_docdecl <- rnDocDecl docdecl
- return (DocEntity rn_docdecl)
-rnDocEntity (DeclEntity name) = do
- rn_name <- lookupTopBndrRn name
- return (DeclEntity rn_name)
-
rnDocDecl :: DocDecl RdrName -> RnM (DocDecl Name)
rnDocDecl (DocCommentNext doc) = do
rn_doc <- rnHsDoc doc
rn_deprec (Deprecation rdr_name txt)
= lookupLocalDataTcNames rdr_name `thenM` \ names ->
returnM [(name, (nameOccName name, txt)) | name <- names]
-
-checkModDeprec :: Maybe DeprecTxt -> Deprecations
--- Check for a module deprecation; done once at top level
-checkModDeprec Nothing = NoDeprecs
-checkModDeprec (Just txt) = DeprecAll txt
\end{code}
%*********************************************************
Renaming of the associated types in instances.
-* We raise an error if we encounter a kind signature in an instance.
-
\begin{code}
rnATInsts :: [LTyClDecl RdrName] -> RnM ([LTyClDecl Name], FreeVars)
-rnATInsts atDecls =
- mapFvRn (wrapLocFstM rnATInst) atDecls
+rnATInsts atDecls = rnList rnATInst atDecls
where
- rnATInst tydecl@TyFunction {} =
- do
- addErr noKindSig
- rnTyClDecl tydecl
+ rnATInst tydecl@TyData {} = rnTyClDecl tydecl
rnATInst tydecl@TySynonym {} = rnTyClDecl tydecl
- rnATInst tydecl@TyData {} =
- do
- checkM (not . isKindSigDecl $ tydecl) $ addErr noKindSig
- rnTyClDecl tydecl
- rnATInst _ =
- panic "RnSource.rnATInsts: not a type declaration"
-
-noKindSig = text "Instances cannot have kind signatures"
+ rnATInst tydecl =
+ pprPanic "RnSource.rnATInsts: invalid AT instance"
+ (ppr (tcdName tydecl))
\end{code}
For the method bindings in class and instance decls, we extend the
\begin{code}
rnSrcDerivDecl :: DerivDecl RdrName -> RnM (DerivDecl Name, FreeVars)
-rnSrcDerivDecl (DerivDecl ty n)
+rnSrcDerivDecl (DerivDecl ty)
= do ty' <- rnLHsType (text "a deriving decl") ty
- n' <- lookupLocatedOccRn n
- let fvs = extractHsTyNames ty' `addOneFV` unLoc n'
- return (DerivDecl ty' n', fvs)
+ let fvs = extractHsTyNames ty'
+ return (DerivDecl ty', fvs)
\end{code}
%*********************************************************
returnM (ForeignType {tcdLName = name', tcdFoType = fo_type, tcdExtName = ext_name},
emptyFVs)
+-- all flavours of type family declarations ("type family", "newtype fanily",
+-- and "data family")
+rnTyClDecl (tydecl@TyFamily {}) =
+ rnFamily tydecl bindTyVarsRn
+
+-- "data", "newtype", "data instance, and "newtype instance" declarations
rnTyClDecl (tydecl@TyData {tcdND = new_or_data, tcdCtxt = context,
tcdLName = tycon, tcdTyVars = tyvars,
tcdTyPats = typatsMaybe, tcdCons = condecls,
tcdKindSig = sig, tcdDerivs = derivs})
- | isKindSigDecl tydecl -- kind signature of indexed type
- = rnTySig tydecl bindTyVarsRn
| is_vanilla -- Normal Haskell data type decl
= ASSERT( isNothing sig ) -- In normal H98 form, kind signature on the
-- data type is syntactically illegal
bindTyVarsRn data_doc tyvars $ \ tyvars' ->
- do { tycon' <- if isIdxTyDecl tydecl
+ do { tycon' <- if isFamInstDecl tydecl
then lookupLocatedOccRn tycon -- may be imported family
else lookupLocatedTopBndrRn tycon
; context' <- rnContext data_doc context
extractHsCtxtTyNames context' `plusFV`
plusFVs (map conDeclFVs condecls') `plusFV`
deriv_fvs `plusFV`
- (if isIdxTyDecl tydecl
+ (if isFamInstDecl tydecl
then unitFV (unLoc tycon') -- type instance => use
else emptyFVs))
}
| otherwise -- GADT
= ASSERT( none typatsMaybe ) -- GADTs cannot have type patterns for now
- do { tycon' <- if isIdxTyDecl tydecl
+ do { tycon' <- if isFamInstDecl tydecl
then lookupLocatedOccRn tycon -- may be imported family
else lookupLocatedTopBndrRn tycon
; checkTc (null (unLoc context)) (badGadtStupidTheta tycon)
tcdCons = condecls', tcdDerivs = derivs'},
plusFVs (map conDeclFVs condecls') `plusFV`
deriv_fvs `plusFV`
- (if isIdxTyDecl tydecl
+ (if isFamInstDecl tydecl
then unitFV (unLoc tycon') -- type instance => use
else emptyFVs))
}
rn_derivs (Just ds) = rnLHsTypes data_doc ds `thenM` \ ds' ->
returnM (Just ds', extractHsTyNames_s ds')
-rnTyClDecl (tydecl@TyFunction {}) =
- rnTySig tydecl bindTyVarsRn
-
+-- "type" and "type instance" declarations
rnTyClDecl tydecl@(TySynonym {tcdLName = name, tcdTyVars = tyvars,
tcdTyPats = typatsMaybe, tcdSynRhs = ty})
= bindTyVarsRn syn_doc tyvars $ \ tyvars' ->
- do { name' <- if isIdxTyDecl tydecl
+ do { name' <- if isFamInstDecl tydecl
then lookupLocatedOccRn name -- may be imported family
else lookupLocatedTopBndrRn name
; typats' <- rnTyPats syn_doc typatsMaybe
tcdTyPats = typats', tcdSynRhs = ty'},
delFVs (map hsLTyVarName tyvars') $
fvs `plusFV`
- (if isIdxTyDecl tydecl
+ (if isFamInstDecl tydecl
then unitFV (unLoc name') -- type instance => use
else emptyFVs))
}
; gen_tyvars <- newLocalsRn gen_rdr_tyvars_w_locs
; rnMethodBinds (unLoc cname') (mkSigTvFn sigs') gen_tyvars mbinds }
- -- Sigh. Check the Haddock docs after the methods, to avoid duplicate errors
- -- Example: class { op :: a->a; op2 x = x }
- -- Don't want a duplicate complait about op2
- ; docs' <- bindLocalNames (map hsLTyVarName tyvars') $ rnDocEntities docs
+ -- Haddock docs
+ ; docs' <- mapM (wrapLocM rnDocDecl) docs
; return (ClassDecl { tcdCtxt = context', tcdLName = cname',
tcdTyVars = tyvars', tcdFDs = fds', tcdSigs = sigs',
rnMbLHsDoc haddock_doc `thenM` \ new_haddock_doc ->
returnM (HsRecField new_name new_ty new_haddock_doc)
--- Rename kind signatures (signatures of indexed data types/newtypes and
--- signatures of type functions)
+-- Rename family declarations
--
-- * This function is parametrised by the routine handling the index
-- variables. On the toplevel, these are defining occurences, whereas they
-- are usage occurences for associated types.
--
-rnTySig :: TyClDecl RdrName
- -> (SDoc -> [LHsTyVarBndr RdrName] ->
- ([LHsTyVarBndr Name] -> RnM (TyClDecl Name, FreeVars)) ->
- RnM (TyClDecl Name, FreeVars))
- -> RnM (TyClDecl Name, FreeVars)
-
-rnTySig (tydecl@TyData {tcdCtxt = context, tcdLName = tycon,
- tcdTyVars = tyvars, tcdTyPats = mb_typats,
- tcdCons = condecls, tcdKindSig = sig,
- tcdDerivs = derivs})
- bindIdxVars =
- ASSERT( null condecls ) -- won't have constructors
- ASSERT( isNothing mb_typats ) -- won't have type patterns
- ASSERT( isNothing derivs ) -- won't have deriving
- ASSERT( isJust sig ) -- will have kind signature
- do { bindIdxVars (ksig_doc tycon) tyvars $ \tyvars' -> do {
- ; tycon' <- lookupLocatedTopBndrRn tycon
- ; context' <- rnContext (ksig_doc tycon) context
- ; returnM (TyData {tcdND = tcdND tydecl, tcdCtxt = context',
- tcdLName = tycon', tcdTyVars = tyvars',
- tcdTyPats = Nothing, tcdKindSig = sig,
- tcdCons = [], tcdDerivs = Nothing},
- delFVs (map hsLTyVarName tyvars') $
- extractHsCtxtTyNames context')
- } }
- where
-
-rnTySig (tydecl@TyFunction {tcdLName = tycon, tcdTyVars = tyvars,
- tcdKind = sig})
+rnFamily :: TyClDecl RdrName
+ -> (SDoc -> [LHsTyVarBndr RdrName] ->
+ ([LHsTyVarBndr Name] -> RnM (TyClDecl Name, FreeVars)) ->
+ RnM (TyClDecl Name, FreeVars))
+ -> RnM (TyClDecl Name, FreeVars)
+
+rnFamily (tydecl@TyFamily {tcdFlavour = flavour,
+ tcdLName = tycon, tcdTyVars = tyvars})
bindIdxVars =
- do { checkM (not . null $ tyvars) $ addErr needOneIdx -- #indexes >= 1
- ; bindIdxVars (ksig_doc tycon) tyvars $ \tyvars' -> do {
+ do { checkM (isDataFlavour flavour -- for synonyms,
+ || not (null tyvars)) $ addErr needOneIdx -- #indexes >= 1
+ ; bindIdxVars (family_doc tycon) tyvars $ \tyvars' -> do {
; tycon' <- lookupLocatedTopBndrRn tycon
- ; returnM (TyFunction {tcdLName = tycon', tcdTyVars = tyvars',
- tcdIso = tcdIso tydecl, tcdKind = sig},
+ ; returnM (TyFamily {tcdFlavour = flavour, tcdLName = tycon',
+ tcdTyVars = tyvars', tcdKind = tcdKind tydecl},
emptyFVs)
} }
+ where
+ isDataFlavour DataFamily = True
+ isDataFlavour _ = False
-ksig_doc tycon = text "In the kind signature for" <+> quotes (ppr tycon)
-needOneIdx = text "Kind signature requires at least one type index"
+family_doc tycon = text "In the family declaration for" <+> quotes (ppr tycon)
+needOneIdx = text "Type family declarations requires at least one type index"
-- Rename associated type declarations (in classes)
--
--- * This can be kind signatures and (default) type function equations.
+-- * This can be family declarations and (default) type instances
--
rnATs :: [LTyClDecl RdrName] -> RnM ([LTyClDecl Name], FreeVars)
rnATs ats = mapFvRn (wrapLocFstM rn_at) ats
where
- rn_at (tydecl@TyData {}) = rnTySig tydecl lookupIdxVars
- rn_at (tydecl@TyFunction {}) = rnTySig tydecl lookupIdxVars
- rn_at (tydecl@TySynonym {}) =
+ rn_at (tydecl@TyFamily {}) = rnFamily tydecl lookupIdxVars
+ rn_at (tydecl@TySynonym {}) =
do
checkM (isNothing (tcdTyPats tydecl)) $ addErr noPatterns
rnTyClDecl tydecl
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