\begin{code}
module RnSource (
- rnSrcDecls, checkModDeprec,
- rnTyClDecl, rnIfaceRuleDecl, rnInstDecl,
- rnBinds, rnBindsAndThen, rnStats,
+ rnSrcDecls, addTcgDUs,
+ rnTyClDecls, checkModDeprec,
+ rnBindGroups, rnBindGroupsAndThen, rnSplice
) where
#include "HsVersions.h"
import HsSyn
-import RdrName ( RdrName, isRdrDataCon, elemRdrEnv )
-import RdrHsSyn ( RdrNameConDecl, RdrNameTyClDecl,
- RdrNameDeprecation, RdrNameFixitySig,
- RdrNameHsBinds,
- extractGenericPatTyVars
- )
+import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, elemLocalRdrEnv )
+import RdrHsSyn ( extractGenericPatTyVars )
import RnHsSyn
-import HsCore
-import RnExpr ( rnExpr )
-import RnTypes ( rnHsType, rnHsSigType, rnHsTypeFVs, rnContext )
-
-import RnBinds ( rnTopMonoBinds, rnMonoBinds, rnMethodBinds,
- rnMonoBindsAndThen, renameSigs, checkSigs )
-import RnEnv ( lookupTopBndrRn, lookupOccRn, lookupSysBndr,
- newLocalsRn, lookupGlobalOccRn,
- bindLocalsFVRn, bindPatSigTyVars,
+import RnExpr ( rnLExpr, checkTH )
+import RnTypes ( rnLHsType, rnLHsTypes, rnHsSigType, rnHsTypeFVs, rnContext )
+import RnBinds ( rnTopBinds, rnBinds, rnMethodBinds,
+ rnBindsAndThen, renameSigs, checkSigs )
+import RnEnv ( lookupTopBndrRn, lookupTopFixSigNames,
+ lookupLocatedTopBndrRn, lookupLocatedOccRn,
+ lookupOccRn, newLocalsRn,
+ bindLocatedLocalsFV, bindPatSigTyVarsFV,
bindTyVarsRn, extendTyVarEnvFVRn,
- bindCoreLocalRn, bindCoreLocalsRn, bindLocalNames,
- checkDupOrQualNames, checkDupNames, mapFvRn,
- lookupTopSrcBndr_maybe, lookupTopSrcBndr,
- dataTcOccs, newIPName, unknownNameErr
+ bindLocalNames, newIPNameRn,
+ checkDupNames, mapFvRn,
+ unknownNameErr
)
import TcRnMonad
-import BasicTypes ( FixitySig(..) )
-import HscTypes ( ExternalPackageState(..), FixityEnv,
- Deprecations(..), plusDeprecs )
-import Module ( moduleEnvElts )
-import Class ( FunDep, DefMeth (..) )
-import TyCon ( DataConDetails(..), visibleDataCons )
+import BasicTypes ( TopLevelFlag(..) )
+import HscTypes ( FixityEnv, FixItem(..),
+ Deprecations, Deprecs(..), DeprecTxt, plusDeprecs )
+import Class ( FunDep )
import Name ( Name )
import NameSet
import NameEnv
-import ErrUtils ( dumpIfSet )
-import PrelNames ( newStablePtrName, bindIOName, returnIOName )
-import List ( partition )
-import Bag ( bagToList )
import Outputable
-import SrcLoc ( SrcLoc )
+import SrcLoc ( Located(..), unLoc, getLoc, noLoc )
import CmdLineOpts ( DynFlag(..) )
-- Warn of unused for-all'd tyvars
-import Maybes ( maybeToBool, seqMaybe )
-import Maybe ( maybe, catMaybes, isNothing )
+import Maybes ( seqMaybe )
+import Maybe ( catMaybes, isNothing )
\end{code}
@rnSourceDecl@ `renames' declarations.
\begin{code}
-rnSrcDecls :: HsGroup RdrName -> RnM (TcGblEnv, HsGroup Name, FreeVars)
+rnSrcDecls :: HsGroup RdrName -> RnM (TcGblEnv, HsGroup Name)
-rnSrcDecls (HsGroup { hs_valds = MonoBind binds sigs _,
+rnSrcDecls (HsGroup { hs_valds = [HsBindGroup binds sigs _],
hs_tyclds = tycl_decls,
hs_instds = inst_decls,
hs_fixds = fix_decls,
hs_depds = deprec_decls,
hs_fords = foreign_decls,
hs_defds = default_decls,
- hs_ruleds = rule_decls,
- hs_coreds = core_decls })
+ hs_ruleds = rule_decls })
= do { -- Deal with deprecations (returns only the extra deprecations)
deprecs <- rnSrcDeprecDecls deprec_decls ;
updGblEnv (\gbl -> gbl { tcg_fix_env = fix_env })
$ do {
- failIfErrsM ; -- No point in continuing if (say) we have duplicate declarations
-
-- Rename other declarations
- (rn_val_decls, src_fvs1) <- rnTopMonoBinds binds sigs ;
- (rn_inst_decls, src_fvs2) <- mapFvRn rnSrcInstDecl inst_decls ;
- (rn_tycl_decls, src_fvs3) <- mapFvRn rnSrcTyClDecl tycl_decls ;
- (rn_rule_decls, src_fvs4) <- mapFvRn rnHsRuleDecl rule_decls ;
- (rn_foreign_decls, src_fvs5) <- mapFvRn rnHsForeignDecl foreign_decls ;
- (rn_default_decls, src_fvs6) <- mapFvRn rnDefaultDecl default_decls ;
- (rn_core_decls, src_fvs7) <- mapFvRn rnCoreDecl core_decls ;
+ traceRn (text "Start rnmono") ;
+ (rn_val_decls, bind_dus) <- rnTopBinds binds sigs ;
+ traceRn (text "finish rnmono" <+> ppr rn_val_decls) ;
+
+ -- You might think that we could build proper def/use information
+ -- for type and class declarations, but they can be involved
+ -- in mutual recursion across modules, and we only do the SCC
+ -- analysis for them in the type checker.
+ -- So we content ourselves with gathering uses only; that
+ -- means we'll only report a declaration as unused if it isn't
+ -- mentioned at all. Ah well.
+ (rn_tycl_decls, src_fvs1)
+ <- mapFvRn (wrapLocFstM rnTyClDecl) tycl_decls ;
+ (rn_inst_decls, src_fvs2)
+ <- mapFvRn (wrapLocFstM rnSrcInstDecl) inst_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 ;
let {
rn_group = HsGroup { hs_valds = rn_val_decls,
hs_depds = [],
hs_fords = rn_foreign_decls,
hs_defds = rn_default_decls,
- hs_ruleds = rn_rule_decls,
- hs_coreds = rn_core_decls } ;
- src_fvs = plusFVs [src_fvs1, src_fvs2, src_fvs3, src_fvs4,
- src_fvs5, src_fvs6, src_fvs7] } ;
-
- traceRn (text "rnSrcDecls" <+> ppr (nameSetToList src_fvs)) ;
+ hs_ruleds = rn_rule_decls } ;
+
+ other_fvs = plusFVs [src_fvs1, src_fvs2, src_fvs3,
+ src_fvs4, src_fvs5] ;
+ src_dus = bind_dus `plusDU` usesOnly other_fvs
+ -- Note: src_dus will contain *uses* for locally-defined types
+ -- and classes, but no *defs* for them. (Because rnTyClDecl
+ -- returns only the uses.) This is a little
+ -- surprising but it doesn't actually matter at all.
+ } ;
+
+ traceRn (text "finish rnSrc" <+> ppr rn_group) ;
+ traceRn (text "finish Dus" <+> ppr src_dus ) ;
tcg_env <- getGblEnv ;
- return (tcg_env, rn_group, src_fvs)
+ return (tcg_env `addTcgDUs` src_dus, rn_group)
}}}
+
+rnTyClDecls :: [LTyClDecl RdrName] -> RnM [LTyClDecl Name]
+rnTyClDecls tycl_decls = do
+ (decls', fvs) <- mapFvRn (wrapLocFstM rnTyClDecl) tycl_decls
+ return decls'
+
+addTcgDUs :: TcGblEnv -> DefUses -> TcGblEnv
+addTcgDUs tcg_env dus = tcg_env { tcg_dus = tcg_dus tcg_env `plusDU` dus }
\end{code}
%*********************************************************
\begin{code}
-rnSrcFixityDecls :: [RdrNameFixitySig] -> TcRn m FixityEnv
+rnSrcFixityDecls :: [LFixitySig RdrName] -> RnM FixityEnv
rnSrcFixityDecls fix_decls
= getGblEnv `thenM` \ gbl_env ->
foldlM rnFixityDecl (tcg_fix_env gbl_env)
- fix_decls `thenM` \ fix_env ->
- traceRn (text "fixity env" <+> ppr fix_env) `thenM_`
+ fix_decls `thenM` \ fix_env ->
+ traceRn (text "fixity env" <+> pprFixEnv fix_env) `thenM_`
returnM fix_env
-rnFixityDecl :: FixityEnv -> RdrNameFixitySig -> TcRn m FixityEnv
-rnFixityDecl fix_env (FixitySig rdr_name fixity loc)
- = -- GHC extension: look up both the tycon and data con
+rnFixityDecl :: FixityEnv -> LFixitySig RdrName -> RnM FixityEnv
+rnFixityDecl fix_env (L loc (FixitySig rdr_name fixity))
+ = setSrcSpan loc $
+ -- GHC extension: look up both the tycon and data con
-- for con-like things
-- If neither are in scope, report an error; otherwise
-- add both to the fixity env
- mappM lookupTopSrcBndr_maybe (dataTcOccs rdr_name) `thenM` \ maybe_ns ->
- case catMaybes maybe_ns of
- [] -> addSrcLoc loc $
- addErr (unknownNameErr rdr_name) `thenM_`
- returnM fix_env
- ns -> foldlM add fix_env ns
+ addLocM lookupTopFixSigNames rdr_name `thenM` \ names ->
+ if null names then
+ addLocErr rdr_name unknownNameErr `thenM_`
+ returnM fix_env
+ else
+ foldlM add fix_env names
where
- add fix_env name
+ add fix_env name
= case lookupNameEnv fix_env name of
- Just (FixitySig _ _ loc') -> addErr (dupFixityDecl rdr_name loc loc') `thenM_`
- returnM fix_env
- Nothing -> returnM (extendNameEnv fix_env name (FixitySig name fixity loc))
-
-dupFixityDecl rdr_name loc1 loc2
+ Just (FixItem _ _ loc')
+ -> addLocErr rdr_name (dupFixityDecl loc') `thenM_`
+ returnM fix_env
+ Nothing -> returnM (extendNameEnv fix_env name fix_item)
+ where
+ fix_item = FixItem (rdrNameOcc (unLoc rdr_name)) fixity
+ (getLoc rdr_name)
+
+pprFixEnv :: FixityEnv -> SDoc
+pprFixEnv env
+ = pprWithCommas (\ (FixItem n f _) -> ppr f <+> ppr n)
+ (nameEnvElts env)
+
+dupFixityDecl loc rdr_name
= vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
- ptext SLIT("at ") <+> ppr loc1,
- ptext SLIT("and") <+> ppr loc2]
+ ptext SLIT("also at ") <+> ppr loc
+ ]
\end{code}
gather them together.
\begin{code}
-rnSrcDeprecDecls :: [RdrNameDeprecation] -> TcRn m Deprecations
+rnSrcDeprecDecls :: [LDeprecDecl RdrName] -> RnM Deprecations
rnSrcDeprecDecls []
= returnM NoDeprecs
rnSrcDeprecDecls decls
- = mappM rn_deprec decls `thenM` \ pairs ->
+ = mappM (addLocM rn_deprec) decls `thenM` \ pairs ->
returnM (DeprecSome (mkNameEnv (catMaybes pairs)))
where
- rn_deprec (Deprecation rdr_name txt loc)
- = addSrcLoc loc $
- lookupTopSrcBndr rdr_name `thenM` \ name ->
- returnM (Just (name, (name,txt)))
+ rn_deprec (Deprecation rdr_name txt)
+ = lookupTopBndrRn rdr_name `thenM` \ name ->
+ returnM (Just (name, (rdrNameOcc rdr_name, txt)))
checkModDeprec :: Maybe DeprecTxt -> Deprecations
-- Check for a module deprecation; done once at top level
checkModDeprec Nothing = NoDeprecs
-checkModdeprec (Just txt) = DeprecAll txt
-
-badDeprec d
- = sep [ptext SLIT("Illegal deprecation when whole module is deprecated"),
- nest 4 (ppr d)]
+checkModDeprec (Just txt) = DeprecAll txt
\end{code}
%*********************************************************
%*********************************************************
\begin{code}
-rnSrcTyClDecl tycl_decl
- = rnTyClDecl tycl_decl `thenM` \ new_decl ->
- finishSourceTyClDecl tycl_decl new_decl `thenM` \ (new_decl', fvs) ->
- returnM (new_decl', fvs `plusFV` tyClDeclFVs new_decl')
-
-rnSrcInstDecl inst
- = rnInstDecl inst `thenM` \ new_inst ->
- finishSourceInstDecl inst new_inst `thenM` \ (new_inst', fvs) ->
- returnM (new_inst', fvs `plusFV` instDeclFVs new_inst')
-
-rnDefaultDecl (DefaultDecl tys src_loc)
- = addSrcLoc src_loc $
- mapFvRn (rnHsTypeFVs doc_str) tys `thenM` \ (tys', fvs) ->
- returnM (DefaultDecl tys' src_loc, fvs)
+rnDefaultDecl (DefaultDecl tys)
+ = mapFvRn (rnHsTypeFVs doc_str) tys `thenM` \ (tys', fvs) ->
+ returnM (DefaultDecl tys', fvs)
where
doc_str = text "In a `default' declaration"
-
-
-rnCoreDecl (CoreDecl name ty rhs loc)
- = addSrcLoc loc $
- lookupTopBndrRn name `thenM` \ name' ->
- rnHsTypeFVs doc_str ty `thenM` \ (ty', ty_fvs) ->
- rnCoreExpr rhs `thenM` \ rhs' ->
- returnM (CoreDecl name' ty' rhs' loc,
- ty_fvs `plusFV` ufExprFVs rhs')
- where
- doc_str = text "In the Core declaration for" <+> quotes (ppr name)
\end{code}
%*********************************************************
of the loop too, and it must be defined in this module.
\begin{code}
-rnTopBinds :: RdrNameHsBinds -> RnM (RenamedHsBinds, FreeVars)
-rnTopBinds EmptyBinds = returnM (EmptyBinds, emptyFVs)
-rnTopBinds (MonoBind bind sigs _) = rnTopMonoBinds bind sigs
- -- The parser doesn't produce other forms
-
-rnBinds :: RdrNameHsBinds -> RnM (RenamedHsBinds, FreeVars)
+rnBindGroups :: [HsBindGroup RdrName] -> RnM ([HsBindGroup Name], DefUses)
-- This version assumes that the binders are already in scope
-- It's used only in 'mdo'
-rnBinds EmptyBinds = returnM (EmptyBinds, emptyFVs)
-rnBinds (MonoBind bind sigs _) = rnMonoBinds bind sigs
-rnBinds b@(IPBinds bind _) = addErr (badIpBinds b) `thenM_`
- returnM (EmptyBinds, emptyFVs)
-
-rnBindsAndThen :: RdrNameHsBinds
- -> (RenamedHsBinds -> RnM (result, FreeVars))
- -> RnM (result, FreeVars)
+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
-rnBindsAndThen EmptyBinds thing_inside = thing_inside EmptyBinds
-rnBindsAndThen (MonoBind bind sigs _) thing_inside = rnMonoBindsAndThen bind sigs thing_inside
-rnBindsAndThen (IPBinds binds is_with) thing_inside
- = warnIf is_with withWarning `thenM_`
- rnIPBinds binds `thenM` \ (binds',fv_binds) ->
- thing_inside (IPBinds binds' is_with) `thenM` \ (thing, fvs_thing) ->
+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)
-\end{code}
-
-%************************************************************************
-%* *
-\subsubsection{@rnIPBinds@s: in implicit parameter bindings} *
-%* *
-%************************************************************************
-
-\begin{code}
rnIPBinds [] = returnM ([], emptyFVs)
-rnIPBinds ((n, expr) : binds)
- = newIPName n `thenM` \ name ->
- rnExpr expr `thenM` \ (expr',fvExpr) ->
+rnIPBinds (bind : binds)
+ = wrapLocFstM rnIPBind bind `thenM` \ (bind', fvBind) ->
rnIPBinds binds `thenM` \ (binds',fvBinds) ->
- returnM ((name, expr') : binds', fvExpr `plusFV` 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}
%*********************************************************
\begin{code}
-rnHsForeignDecl (ForeignImport name ty spec isDeprec src_loc)
- = addSrcLoc src_loc $
- lookupTopBndrRn name `thenM` \ name' ->
+rnHsForeignDecl (ForeignImport name ty spec isDeprec)
+ = lookupLocatedTopBndrRn name `thenM` \ name' ->
rnHsTypeFVs (fo_decl_msg name) ty `thenM` \ (ty', fvs) ->
- returnM (ForeignImport name' ty' spec isDeprec src_loc,
- fvs `plusFV` extras spec)
- where
- extras (CImport _ _ _ _ CWrapper) = mkFVs [newStablePtrName,
- bindIOName, returnIOName]
- extras _ = emptyFVs
-
-rnHsForeignDecl (ForeignExport name ty spec isDeprec src_loc)
- = addSrcLoc src_loc $
- lookupOccRn name `thenM` \ name' ->
- rnHsTypeFVs (fo_decl_msg name) ty `thenM` \ (ty', fvs) ->
- returnM (ForeignExport name' ty' spec isDeprec src_loc,
- mkFVs [name', bindIOName, returnIOName] `plusFV` fvs )
+ returnM (ForeignImport name' ty' spec isDeprec, fvs)
+
+rnHsForeignDecl (ForeignExport name ty spec isDeprec)
+ = lookupLocatedOccRn name `thenM` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenM` \ (ty', fvs) ->
+ returnM (ForeignExport name' ty' spec isDeprec, fvs )
-- NB: a foreign export is an *occurrence site* for name, so
-- we add it to the free-variable list. It might, for example,
-- be imported from another module
%*********************************************************
\begin{code}
-rnInstDecl (InstDecl inst_ty mbinds uprags maybe_dfun_rdr_name src_loc)
+rnSrcInstDecl (InstDecl inst_ty mbinds uprags)
-- Used for both source and interface file decls
- = addSrcLoc src_loc $
- rnHsSigType (text "an instance decl") inst_ty `thenM` \ inst_ty' ->
-
- (case maybe_dfun_rdr_name of
- Nothing -> returnM Nothing
- Just dfun_rdr_name -> lookupGlobalOccRn dfun_rdr_name `thenM` \ dfun_name ->
- returnM (Just dfun_name)
- ) `thenM` \ maybe_dfun_name ->
-
- -- The typechecker checks that all the bindings are for the right class.
- returnM (InstDecl inst_ty' EmptyMonoBinds [] maybe_dfun_name src_loc)
-
--- Compare finishSourceTyClDecl
-finishSourceInstDecl (InstDecl _ mbinds uprags _ _ )
- (InstDecl inst_ty _ _ maybe_dfun_name src_loc)
- -- Used for both source decls only
- = ASSERT( not (maybeToBool maybe_dfun_name) ) -- Source decl!
+ = rnHsSigType (text "an instance decl") inst_ty `thenM` \ inst_ty' ->
+
+ -- Rename the bindings
+ -- The typechecker (not the renamer) checks that all
+ -- the bindings are for the right class
let
meth_doc = text "In the bindings in an instance declaration"
- meth_names = collectLocatedMonoBinders mbinds
- (inst_tyvars, _, cls,_) = splitHsInstDeclTy inst_ty
- -- (Slightly strangely) the forall-d tyvars scope over
- -- the method bindings too
+ meth_names = collectHsBindLocatedBinders mbinds
+ (inst_tyvars, _, cls,_) = splitHsInstDeclTy (unLoc inst_ty')
in
-
- -- Rename the bindings
- -- NB meth_names can be qualified!
- checkDupNames meth_doc meth_names `thenM_`
+ checkDupNames meth_doc meth_names `thenM_`
extendTyVarEnvForMethodBinds inst_tyvars (
+ -- (Slightly strangely) the forall-d tyvars scope over
+ -- the method bindings too
rnMethodBinds cls [] mbinds
) `thenM` \ (mbinds', meth_fvs) ->
- let
- binders = collectMonoBinders mbinds'
- in
-- Rename the prags and signatures.
-- Note that the type variables are not in scope here,
-- so that instance Eq a => Eq (T a) where
-- works OK.
--
-- But the (unqualified) method names are in scope
+ let
+ binders = collectHsBindBinders mbinds'
+ in
bindLocalNames binders (renameSigs uprags) `thenM` \ uprags' ->
- checkSigs okInstDclSig (mkNameSet binders) uprags' `thenM_`
+ checkSigs (okInstDclSig (mkNameSet binders)) uprags' `thenM_`
- returnM (InstDecl inst_ty mbinds' uprags' maybe_dfun_name src_loc,
- meth_fvs `plusFV` hsSigsFVs uprags')
+ returnM (InstDecl inst_ty' mbinds' uprags',
+ meth_fvs `plusFV` hsSigsFVs uprags'
+ `plusFV` extractHsTyNames inst_ty')
\end{code}
+For the method bindings in class and instance decls, we extend the
+type variable environment iff -fglasgow-exts
+
+\begin{code}
+extendTyVarEnvForMethodBinds tyvars thing_inside
+ = doptM Opt_GlasgowExts `thenM` \ opt_GlasgowExts ->
+ if opt_GlasgowExts then
+ extendTyVarEnvFVRn (map hsLTyVarName tyvars) thing_inside
+ else
+ thing_inside
+\end{code}
+
+
%*********************************************************
%* *
\subsection{Rules}
%*********************************************************
\begin{code}
-rnIfaceRuleDecl (IfaceRule rule_name act vars fn args rhs src_loc)
- = addSrcLoc src_loc $
- lookupOccRn fn `thenM` \ fn' ->
- rnCoreBndrs vars $ \ vars' ->
- mappM rnCoreExpr args `thenM` \ args' ->
- rnCoreExpr rhs `thenM` \ rhs' ->
- returnM (IfaceRule rule_name act vars' fn' args' rhs' src_loc)
-
-rnIfaceRuleDecl (IfaceRuleOut fn rule) -- Builtin rules come this way
- = lookupOccRn fn `thenM` \ fn' ->
- returnM (IfaceRuleOut fn' rule)
-
-rnHsRuleDecl (HsRule rule_name act vars lhs rhs src_loc)
- = addSrcLoc src_loc $
- bindPatSigTyVars (collectRuleBndrSigTys vars) $
-
- bindLocalsFVRn doc (map get_var vars) $ \ ids ->
+rnHsRuleDecl (HsRule rule_name act vars lhs rhs)
+ = bindPatSigTyVarsFV (collectRuleBndrSigTys vars) $
+
+ bindLocatedLocalsFV doc (map get_var vars) $ \ ids ->
mapFvRn rn_var (vars `zip` ids) `thenM` \ (vars', fv_vars) ->
- rnExpr lhs `thenM` \ (lhs', fv_lhs) ->
- rnExpr rhs `thenM` \ (rhs', fv_rhs) ->
+ rnLExpr lhs `thenM` \ (lhs', fv_lhs) ->
+ rnLExpr rhs `thenM` \ (rhs', fv_rhs) ->
let
mb_bad = validRuleLhs ids lhs'
in
bad_vars = [var | var <- ids, not (var `elemNameSet` fv_lhs)]
in
mappM (addErr . badRuleVar rule_name) bad_vars `thenM_`
- returnM (HsRule rule_name act vars' lhs' rhs' src_loc,
- fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
+ returnM (HsRule rule_name act vars' lhs' rhs',
+ fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
where
doc = text "In the transformation rule" <+> ftext rule_name
get_var (RuleBndr v) = v
get_var (RuleBndrSig v _) = v
- rn_var (RuleBndr v, id) = returnM (RuleBndr id, emptyFVs)
- rn_var (RuleBndrSig v t, id) = rnHsTypeFVs doc t `thenM` \ (t', fvs) ->
- returnM (RuleBndrSig id t', fvs)
+ rn_var (RuleBndr (L loc v), id)
+ = returnM (RuleBndr (L loc id), emptyFVs)
+ rn_var (RuleBndrSig (L loc v) t, id)
+ = rnHsTypeFVs doc t `thenM` \ (t', fvs) ->
+ returnM (RuleBndrSig (L loc id) t', fvs)
\end{code}
Check the shape of a transformation rule LHS. Currently
NB: if you add new cases here, make sure you add new ones to TcRule.ruleLhsTvs
\begin{code}
-validRuleLhs :: [Name] -> RenamedHsExpr -> Maybe RenamedHsExpr
+validRuleLhs :: [Name] -> LHsExpr Name -> Maybe (HsExpr Name)
-- Nothing => OK
-- Just e => Not ok, and e is the offending expression
validRuleLhs foralls lhs
- = check lhs
+ = checkl lhs
where
- check (OpApp e1 op _ e2) = check op `seqMaybe` check_e e1 `seqMaybe` check_e e2
- check (HsApp e1 e2) = check e1 `seqMaybe` check_e e2
+ checkl (L loc e) = check e
+
+ check (OpApp e1 op _ e2) = checkl op `seqMaybe` checkl_e e1 `seqMaybe` checkl_e e2
+ check (HsApp e1 e2) = checkl e1 `seqMaybe` checkl_e e2
check (HsVar v) | v `notElem` foralls = Nothing
check other = Just other -- Failure
+ checkl_e (L loc e) = check_e e
+
check_e (HsVar v) = Nothing
- check_e (HsPar e) = check_e e
+ check_e (HsPar e) = checkl_e e
check_e (HsLit e) = Nothing
check_e (HsOverLit e) = Nothing
- check_e (OpApp e1 op _ e2) = check_e e1 `seqMaybe` check_e op `seqMaybe` check_e e2
- check_e (HsApp e1 e2) = check_e e1 `seqMaybe` check_e e2
- check_e (NegApp e _) = check_e e
- check_e (ExplicitList _ es) = check_es es
- check_e (ExplicitTuple es _) = check_es es
+ check_e (OpApp e1 op _ e2) = checkl_e e1 `seqMaybe` checkl_e op `seqMaybe` checkl_e e2
+ check_e (HsApp e1 e2) = checkl_e e1 `seqMaybe` checkl_e e2
+ check_e (NegApp e _) = checkl_e e
+ check_e (ExplicitList _ es) = checkl_es es
+ check_e (ExplicitTuple es _) = checkl_es es
check_e other = Just other -- Fails
- check_es es = foldr (seqMaybe . check_e) Nothing es
+ checkl_es es = foldr (seqMaybe . checkl_e) Nothing es
+
+badRuleLhsErr name lhs (Just bad_e)
+ = sep [ptext SLIT("Rule") <+> ftext name <> colon,
+ nest 4 (vcat [ptext SLIT("Illegal expression:") <+> ppr bad_e,
+ ptext SLIT("in left-hand side:") <+> ppr lhs])]
+ $$
+ ptext SLIT("LHS must be of form (f e1 .. en) where f is not forall'd")
+
+badRuleVar name var
+ = sep [ptext SLIT("Rule") <+> doubleQuotes (ftext name) <> colon,
+ ptext SLIT("Forall'd variable") <+> quotes (ppr var) <+>
+ ptext SLIT("does not appear on left hand side")]
\end{code}
However, we can also do some scoping checks at the same time.
\begin{code}
-rnTyClDecl (IfaceSig {tcdName = name, tcdType = ty, tcdIdInfo = id_infos, tcdLoc = loc})
- = addSrcLoc loc $
- lookupTopBndrRn name `thenM` \ name' ->
- rnHsType doc_str ty `thenM` \ ty' ->
- mappM rnIdInfo id_infos `thenM` \ id_infos' ->
- returnM (IfaceSig {tcdName = name', tcdType = ty', tcdIdInfo = id_infos', tcdLoc = loc})
- where
- doc_str = text "In the interface signature for" <+> quotes (ppr name)
-
-rnTyClDecl (ForeignType {tcdName = name, tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc})
- = addSrcLoc loc $
- lookupTopBndrRn name `thenM` \ name' ->
- returnM (ForeignType {tcdName = name', tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc})
-
-rnTyClDecl (TyData {tcdND = new_or_data, tcdCtxt = context, tcdName = tycon,
- tcdTyVars = tyvars, tcdCons = condecls, tcdGeneric = want_generic,
- tcdDerivs = derivs, tcdLoc = src_loc})
- = addSrcLoc src_loc $
- lookupTopBndrRn tycon `thenM` \ tycon' ->
+rnTyClDecl (ForeignType {tcdLName = name, tcdFoType = fo_type, tcdExtName = ext_name})
+ = lookupLocatedTopBndrRn name `thenM` \ name' ->
+ returnM (ForeignType {tcdLName = name', tcdFoType = fo_type, tcdExtName = ext_name},
+ emptyFVs)
+
+rnTyClDecl (TyData {tcdND = new_or_data, tcdCtxt = context, tcdLName = tycon,
+ tcdTyVars = tyvars, tcdCons = condecls,
+ tcdKindSig = sig, tcdDerivs = derivs})
+ | 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' ->
- rnContext data_doc context `thenM` \ context' ->
- rn_derivs derivs `thenM` \ derivs' ->
- checkDupOrQualNames data_doc con_names `thenM_`
-
- rnConDecls tycon' condecls `thenM` \ condecls' ->
- returnM (TyData {tcdND = new_or_data, tcdCtxt = context', tcdName = tycon',
- tcdTyVars = tyvars', tcdCons = condecls', tcdGeneric = want_generic,
- tcdDerivs = derivs', tcdLoc = src_loc})
+ do { tycon' <- lookupLocatedTopBndrRn tycon
+ ; context' <- rnContext data_doc context
+ ; (derivs', deriv_fvs) <- rn_derivs derivs
+ ; checkDupNames data_doc con_names
+ ; condecls' <- rnConDecls (unLoc tycon') condecls
+ ; returnM (TyData {tcdND = new_or_data, tcdCtxt = context', tcdLName = tycon',
+ tcdTyVars = tyvars', tcdKindSig = Nothing, tcdCons = condecls',
+ tcdDerivs = derivs'},
+ delFVs (map hsLTyVarName tyvars') $
+ extractHsCtxtTyNames context' `plusFV`
+ plusFVs (map conDeclFVs condecls') `plusFV`
+ deriv_fvs) }
+
+ | otherwise -- GADT
+ = ASSERT( null (unLoc context) )
+ do { tycon' <- lookupLocatedTopBndrRn tycon
+ ; tyvars' <- bindTyVarsRn data_doc tyvars
+ (\ tyvars' -> return tyvars')
+ -- For GADTs, the type variables in the declaration
+ -- do not scope over the constructor signatures
+ -- data T a where { T1 :: forall b. b-> b }
+ ; (derivs', deriv_fvs) <- rn_derivs derivs
+ ; checkDupNames data_doc con_names
+ ; condecls' <- rnConDecls (unLoc tycon') condecls
+ ; returnM (TyData {tcdND = new_or_data, tcdCtxt = noLoc [], tcdLName = tycon',
+ tcdTyVars = tyvars', tcdCons = condecls', tcdKindSig = sig,
+ tcdDerivs = derivs'},
+ plusFVs (map conDeclFVs condecls') `plusFV` deriv_fvs) }
+
where
+ is_vanilla = case condecls of -- Yuk
+ [] -> True
+ L _ (ConDecl {}) : _ -> True
+ other -> False
+
data_doc = text "In the data type declaration for" <+> quotes (ppr tycon)
- con_names = map conDeclName (visibleDataCons condecls)
+ con_names = map con_names_helper condecls
- rn_derivs Nothing = returnM Nothing
- rn_derivs (Just ds) = rnContext data_doc ds `thenM` \ ds' -> returnM (Just ds')
+ con_names_helper (L _ (ConDecl n _ _ _)) = n
+ con_names_helper (L _ (GadtDecl n _)) = n
+
+ rn_derivs Nothing = returnM (Nothing, emptyFVs)
+ rn_derivs (Just ds) = rnLHsTypes data_doc ds `thenM` \ ds' ->
+ returnM (Just ds', extractHsTyNames_s ds')
-rnTyClDecl (TySynonym {tcdName = name, tcdTyVars = tyvars, tcdSynRhs = ty, tcdLoc = src_loc})
- = addSrcLoc src_loc $
- lookupTopBndrRn name `thenM` \ name' ->
+rnTyClDecl (TySynonym {tcdLName = name, tcdTyVars = tyvars, tcdSynRhs = ty})
+ = lookupLocatedTopBndrRn name `thenM` \ name' ->
bindTyVarsRn syn_doc tyvars $ \ tyvars' ->
- rnHsType syn_doc ty `thenM` \ ty' ->
- returnM (TySynonym {tcdName = name', tcdTyVars = tyvars', tcdSynRhs = ty', tcdLoc = src_loc})
+ rnHsTypeFVs syn_doc ty `thenM` \ (ty', fvs) ->
+ returnM (TySynonym {tcdLName = name', tcdTyVars = tyvars',
+ tcdSynRhs = ty'},
+ delFVs (map hsLTyVarName tyvars') fvs)
where
syn_doc = text "In the declaration for type synonym" <+> quotes (ppr name)
-rnTyClDecl (ClassDecl {tcdCtxt = context, tcdName = cname,
+rnTyClDecl (ClassDecl {tcdCtxt = context, tcdLName = cname,
tcdTyVars = tyvars, tcdFDs = fds, tcdSigs = sigs,
- tcdLoc = src_loc})
- -- Used for both source and interface file decls
- = addSrcLoc src_loc $
-
- lookupTopBndrRn cname `thenM` \ cname' ->
+ tcdMeths = mbinds})
+ = lookupLocatedTopBndrRn cname `thenM` \ cname' ->
-- Tyvars scope over superclass context and method signatures
- bindTyVarsRn cls_doc tyvars $ \ tyvars' ->
-
- -- Check the superclasses
- rnContext cls_doc context `thenM` \ context' ->
-
- -- Check the functional dependencies
- rnFds cls_doc fds `thenM` \ fds' ->
+ bindTyVarsRn cls_doc tyvars ( \ tyvars' ->
+ rnContext cls_doc context `thenM` \ context' ->
+ rnFds cls_doc fds `thenM` \ fds' ->
+ renameSigs sigs `thenM` \ sigs' ->
+ returnM (tyvars', context', fds', sigs')
+ ) `thenM` \ (tyvars', context', fds', sigs') ->
-- Check the signatures
-- First process the class op sigs (op_sigs), then the fixity sigs (non_op_sigs).
let
- (op_sigs, non_op_sigs) = partition isClassOpSig sigs
- sig_rdr_names_w_locs = [(op,locn) | ClassOpSig op _ _ locn <- sigs]
+ sig_rdr_names_w_locs = [op | L _ (Sig op _) <- sigs]
in
- checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenM_`
- mappM (rnClassOp cname' fds') op_sigs `thenM` \ sigs' ->
- let
- binders = mkNameSet [ nm | (ClassOpSig nm _ _ _) <- sigs' ]
- in
- renameSigs non_op_sigs `thenM` \ non_ops' ->
- checkSigs okClsDclSig binders non_ops' `thenM_`
+ 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
-- for instance decls.
- returnM (ClassDecl { tcdCtxt = context', tcdName = cname', tcdTyVars = tyvars',
- tcdFDs = fds', tcdSigs = non_ops' ++ sigs', tcdMeths = Nothing,
- tcdLoc = src_loc})
- where
- cls_doc = text "In the declaration for class" <+> ppr cname
- sig_doc = text "In the signatures for class" <+> ppr cname
-
-rnClassOp clas clas_fds sig@(ClassOpSig op dm_stuff ty locn)
- = addSrcLoc locn $
- lookupTopBndrRn op `thenM` \ op_name ->
-
- -- Check the signature
- rnHsSigType (quotes (ppr op)) ty `thenM` \ new_ty ->
-
- -- Make the default-method name
- (case dm_stuff of
- DefMeth dm_rdr_name
- -> -- Imported class that has a default method decl
- lookupSysBndr dm_rdr_name `thenM` \ dm_name ->
- returnM (DefMeth dm_name)
- -- An imported class decl for a class decl that had an explicit default
- -- method, mentions, rather than defines,
- -- the default method, so we must arrange to pull it in
-
- GenDefMeth -> returnM GenDefMeth
- NoDefMeth -> returnM NoDefMeth
- ) `thenM` \ dm_stuff' ->
-
- returnM (ClassOpSig op_name dm_stuff' new_ty locn)
-
-finishSourceTyClDecl :: RdrNameTyClDecl -> RenamedTyClDecl -> RnM (RenamedTyClDecl, FreeVars)
- -- Used for source file decls only
- -- Renames the default-bindings of a class decl
-finishSourceTyClDecl (ClassDecl {tcdMeths = Just mbinds, tcdLoc = src_loc}) -- Get mbinds from here
- rn_cls_decl@(ClassDecl {tcdName = cls, tcdTyVars = tyvars}) -- Everything else is here
- -- There are some default-method bindings (abeit possibly empty) so
- -- this is a source-code class declaration
- = -- The newLocals call is tiresome: given a generic class decl
+ -- The newLocals call is tiresome: given a generic class decl
-- class C a where
-- op :: a -> a
-- op {| x+y |} (Inl a) = ...
-- op {| a*b |} (a*b) = ...
-- we want to name both "x" tyvars with the same unique, so that they are
-- easy to group together in the typechecker.
- -- Hence the
- addSrcLoc src_loc $
- extendTyVarEnvForMethodBinds tyvars $
- getLocalRdrEnv `thenM` \ name_env ->
- let
- meth_rdr_names_w_locs = collectLocatedMonoBinders mbinds
- gen_rdr_tyvars_w_locs = [(tv,src_loc) | tv <- extractGenericPatTyVars mbinds,
- not (tv `elemRdrEnv` name_env)]
- in
- checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenM_`
- newLocalsRn gen_rdr_tyvars_w_locs `thenM` \ gen_tyvars ->
- rnMethodBinds cls gen_tyvars mbinds `thenM` \ (mbinds', meth_fvs) ->
- returnM (rn_cls_decl {tcdMeths = Just mbinds'}, meth_fvs)
+ extendTyVarEnvForMethodBinds tyvars' (
+ getLocalRdrEnv `thenM` \ name_env ->
+ let
+ meth_rdr_names_w_locs = collectHsBindLocatedBinders mbinds
+ gen_rdr_tyvars_w_locs =
+ [ tv | tv <- extractGenericPatTyVars mbinds,
+ not (unLoc tv `elemLocalRdrEnv` name_env) ]
+ in
+ checkDupNames meth_doc meth_rdr_names_w_locs `thenM_`
+ newLocalsRn gen_rdr_tyvars_w_locs `thenM` \ gen_tyvars ->
+ rnMethodBinds (unLoc cname') gen_tyvars mbinds
+ ) `thenM` \ (mbinds', meth_fvs) ->
+
+ returnM (ClassDecl { tcdCtxt = context', tcdLName = cname', tcdTyVars = tyvars',
+ tcdFDs = fds', tcdSigs = sigs', tcdMeths = mbinds'},
+ delFVs (map hsLTyVarName tyvars') $
+ extractHsCtxtTyNames context' `plusFV`
+ plusFVs (map extractFunDepNames (map unLoc fds')) `plusFV`
+ hsSigsFVs sigs' `plusFV`
+ meth_fvs)
where
- meth_doc = text "In the default-methods for class" <+> ppr (tcdName rn_cls_decl)
-
-finishSourceTyClDecl _ tycl_decl@(TyData {tcdDerivs = derivings})
- -- Derivings are returned here so that they don't form part of the tyClDeclFVs.
- -- This is important, because tyClDeclFVs should contain only the
- -- FVs that are `needed' by the interface file declaration, and
- -- derivings do not appear in this. It also means that the tcGroups
- -- are smaller, which turned out to be important for the usage inference. KSW 2002-02.
- = returnM (tycl_decl,
- maybe emptyFVs extractHsCtxtTyNames derivings)
-
-finishSourceTyClDecl _ tycl_decl = returnM (tycl_decl, emptyFVs)
- -- Not a class declaration
-\end{code}
-
-For the method bindings in class and instance decls, we extend the
-type variable environment iff -fglasgow-exts
-
-\begin{code}
-extendTyVarEnvForMethodBinds tyvars thing_inside
- = doptM Opt_GlasgowExts `thenM` \ opt_GlasgowExts ->
- if opt_GlasgowExts then
- extendTyVarEnvFVRn (map hsTyVarName tyvars) thing_inside
- else
- thing_inside
+ 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
\end{code}
-
%*********************************************************
%* *
\subsection{Support code for type/data declarations}
%*********************************************************
\begin{code}
-conDeclName :: RdrNameConDecl -> (RdrName, SrcLoc)
-conDeclName (ConDecl n _ _ _ l) = (n,l)
-
-rnConDecls :: Name -> DataConDetails RdrNameConDecl -> RnM (DataConDetails RenamedConDecl)
-rnConDecls tycon Unknown = returnM Unknown
-rnConDecls tycon (HasCons n) = returnM (HasCons n)
-rnConDecls tycon (DataCons condecls)
+rnConDecls :: Name -> [LConDecl RdrName] -> RnM [LConDecl Name]
+rnConDecls tycon condecls
= -- Check that there's at least one condecl,
-- or else we're reading an interface file, or -fglasgow-exts
(if null condecls then
doptM Opt_GlasgowExts `thenM` \ glaExts ->
- getModeRn `thenM` \ mode ->
- checkErr (glaExts || isInterfaceMode mode)
- (emptyConDeclsErr tycon)
+ checkErr glaExts (emptyConDeclsErr tycon)
else returnM ()
) `thenM_`
+ mappM (wrapLocM rnConDecl) condecls
- mappM rnConDecl condecls `thenM` \ condecls' ->
- returnM (DataCons condecls')
-
-rnConDecl :: RdrNameConDecl -> RnM RenamedConDecl
-rnConDecl (ConDecl name tvs cxt details locn)
- = addSrcLoc locn $
- checkConName name `thenM_`
- lookupTopBndrRn name `thenM` \ new_name ->
+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 locn details `thenM` \ new_details ->
- returnM (ConDecl new_name new_tyvars new_context new_details locn)
+ 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 (GadtDecl name ty)
+ = addLocM checkConName name `thenM_`
+ lookupLocatedTopBndrRn name `thenM` \ new_name ->
+ rnHsSigType doc ty `thenM` \ new_ty ->
+ returnM (GadtDecl new_name new_ty)
where
doc = text "In the definition of data constructor" <+> quotes (ppr name)
-rnConDetails doc locn (PrefixCon tys)
- = mappM (rnBangTy doc) tys `thenM` \ new_tys ->
+rnConDetails doc (PrefixCon tys)
+ = mappM (rnLHsType doc) tys `thenM` \ new_tys ->
returnM (PrefixCon new_tys)
-rnConDetails doc locn (InfixCon ty1 ty2)
- = rnBangTy doc ty1 `thenM` \ new_ty1 ->
- rnBangTy doc ty2 `thenM` \ new_ty2 ->
+rnConDetails doc (InfixCon ty1 ty2)
+ = rnLHsType doc ty1 `thenM` \ new_ty1 ->
+ rnLHsType doc ty2 `thenM` \ new_ty2 ->
returnM (InfixCon new_ty1 new_ty2)
-rnConDetails doc locn (RecCon fields)
- = checkDupOrQualNames doc field_names `thenM_`
+rnConDetails doc (RecCon fields)
+ = checkDupNames doc field_names `thenM_`
mappM (rnField doc) fields `thenM` \ new_fields ->
returnM (RecCon new_fields)
where
- field_names = [(fld, locn) | (fld, _) <- fields]
+ field_names = [fld | (fld, _) <- fields]
rnField doc (name, ty)
- = lookupTopBndrRn name `thenM` \ new_name ->
- rnBangTy doc ty `thenM` \ new_ty ->
+ = lookupLocatedTopBndrRn name `thenM` \ new_name ->
+ rnLHsType doc ty `thenM` \ new_ty ->
returnM (new_name, new_ty)
-rnBangTy doc (BangType s ty)
- = rnHsType doc ty `thenM` \ new_ty ->
- returnM (BangType s new_ty)
-
-- This data decl will parse OK
-- data T = a Int
-- treating "a" as the constructor.
-- data T = :% Int Int
-- from interface files, which always print in prefix form
-checkConName name
- = checkErr (isRdrDataCon name) (badDataCon name)
+checkConName name = checkErr (isRdrDataCon name) (badDataCon name)
+
+badDataCon name
+ = hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
+
+emptyConDeclsErr tycon
+ = sep [quotes (ppr tycon) <+> ptext SLIT("has no constructors"),
+ nest 4 (ptext SLIT("(-fglasgow-exts permits this)"))]
\end{code}
%*********************************************************
\begin{code}
-rnFds :: SDoc -> [FunDep RdrName] -> RnM [FunDep Name]
+rnFds :: SDoc -> [Located (FunDep RdrName)] -> RnM [Located (FunDep Name)]
rnFds doc fds
- = mappM rn_fds fds
+ = mappM (wrapLocM rn_fds) fds
where
rn_fds (tys1, tys2)
= rnHsTyVars doc tys1 `thenM` \ tys1' ->
rnHsTyvar doc tyvar = lookupOccRn tyvar
\end{code}
-%*********************************************************
-%* *
-\subsection{IdInfo}
-%* *
-%*********************************************************
-
-\begin{code}
-rnIdInfo (HsWorker worker arity)
- = lookupOccRn worker `thenM` \ worker' ->
- returnM (HsWorker worker' arity)
-
-rnIdInfo (HsUnfold inline expr) = rnCoreExpr expr `thenM` \ expr' ->
- returnM (HsUnfold inline expr')
-rnIdInfo (HsStrictness str) = returnM (HsStrictness str)
-rnIdInfo (HsArity arity) = returnM (HsArity arity)
-rnIdInfo HsNoCafRefs = returnM HsNoCafRefs
-\end{code}
-
-@UfCore@ expressions.
-
-\begin{code}
-rnCoreExpr (UfType ty)
- = rnHsType (text "unfolding type") ty `thenM` \ ty' ->
- returnM (UfType ty')
-
-rnCoreExpr (UfVar v)
- = lookupOccRn v `thenM` \ v' ->
- returnM (UfVar v')
-
-rnCoreExpr (UfLit l)
- = returnM (UfLit l)
-
-rnCoreExpr (UfLitLit l ty)
- = rnHsType (text "litlit") ty `thenM` \ ty' ->
- returnM (UfLitLit l ty')
-
-rnCoreExpr (UfFCall cc ty)
- = rnHsType (text "ccall") ty `thenM` \ ty' ->
- returnM (UfFCall cc ty')
-
-rnCoreExpr (UfTuple (HsTupCon boxity arity) args)
- = mappM rnCoreExpr args `thenM` \ args' ->
- returnM (UfTuple (HsTupCon boxity arity) args')
-
-rnCoreExpr (UfApp fun arg)
- = rnCoreExpr fun `thenM` \ fun' ->
- rnCoreExpr arg `thenM` \ arg' ->
- returnM (UfApp fun' arg')
-
-rnCoreExpr (UfCase scrut bndr alts)
- = rnCoreExpr scrut `thenM` \ scrut' ->
- bindCoreLocalRn bndr $ \ bndr' ->
- mappM rnCoreAlt alts `thenM` \ alts' ->
- returnM (UfCase scrut' bndr' alts')
-
-rnCoreExpr (UfNote note expr)
- = rnNote note `thenM` \ note' ->
- rnCoreExpr expr `thenM` \ expr' ->
- returnM (UfNote note' expr')
-
-rnCoreExpr (UfLam bndr body)
- = rnCoreBndr bndr $ \ bndr' ->
- rnCoreExpr body `thenM` \ body' ->
- returnM (UfLam bndr' body')
-
-rnCoreExpr (UfLet (UfNonRec bndr rhs) body)
- = rnCoreExpr rhs `thenM` \ rhs' ->
- rnCoreBndr bndr $ \ bndr' ->
- rnCoreExpr body `thenM` \ body' ->
- returnM (UfLet (UfNonRec bndr' rhs') body')
-
-rnCoreExpr (UfLet (UfRec pairs) body)
- = rnCoreBndrs bndrs $ \ bndrs' ->
- mappM rnCoreExpr rhss `thenM` \ rhss' ->
- rnCoreExpr body `thenM` \ body' ->
- returnM (UfLet (UfRec (bndrs' `zip` rhss')) body')
- where
- (bndrs, rhss) = unzip pairs
-\end{code}
-
-\begin{code}
-rnCoreBndr (UfValBinder name ty) thing_inside
- = rnHsType doc ty `thenM` \ ty' ->
- bindCoreLocalRn name $ \ name' ->
- thing_inside (UfValBinder name' ty')
- where
- doc = text "unfolding id"
-
-rnCoreBndr (UfTyBinder name kind) thing_inside
- = bindCoreLocalRn name $ \ name' ->
- thing_inside (UfTyBinder name' kind)
-
-rnCoreBndrs [] thing_inside = thing_inside []
-rnCoreBndrs (b:bs) thing_inside = rnCoreBndr b $ \ name' ->
- rnCoreBndrs bs $ \ names' ->
- thing_inside (name':names')
-\end{code}
-
-\begin{code}
-rnCoreAlt (con, bndrs, rhs)
- = rnUfCon con `thenM` \ con' ->
- bindCoreLocalsRn bndrs $ \ bndrs' ->
- rnCoreExpr rhs `thenM` \ rhs' ->
- returnM (con', bndrs', rhs')
-
-rnNote (UfCoerce ty)
- = rnHsType (text "unfolding coerce") ty `thenM` \ ty' ->
- returnM (UfCoerce ty')
-
-rnNote (UfSCC cc) = returnM (UfSCC cc)
-rnNote UfInlineCall = returnM UfInlineCall
-rnNote UfInlineMe = returnM UfInlineMe
-
-
-rnUfCon UfDefault
- = returnM UfDefault
-
-rnUfCon (UfTupleAlt tup_con)
- = returnM (UfTupleAlt tup_con)
-
-rnUfCon (UfDataAlt con)
- = lookupOccRn con `thenM` \ con' ->
- returnM (UfDataAlt con')
-
-rnUfCon (UfLitAlt lit)
- = returnM (UfLitAlt lit)
-
-rnUfCon (UfLitLitAlt lit ty)
- = rnHsType (text "litlit") ty `thenM` \ ty' ->
- returnM (UfLitLitAlt lit ty')
-\end{code}
%*********************************************************
%* *
-\subsection{Statistics}
+ Splices
%* *
%*********************************************************
\begin{code}
-rnStats :: [RenamedHsDecl] -- Imported decls
- -> TcRn m ()
-rnStats imp_decls
- = doptM Opt_D_dump_rn_trace `thenM` \ dump_rn_trace ->
- doptM Opt_D_dump_rn_stats `thenM` \ dump_rn_stats ->
- doptM Opt_D_dump_rn `thenM` \ dump_rn ->
- getEps `thenM` \ eps ->
-
- ioToTcRn (dumpIfSet (dump_rn_trace || dump_rn_stats || dump_rn)
- "Renamer statistics"
- (getRnStats eps imp_decls)) `thenM_`
- returnM ()
-
-getRnStats :: ExternalPackageState -> [RenamedHsDecl] -> SDoc
-getRnStats eps imported_decls
- = hcat [text "Renamer stats: ", stats]
- where
- n_mods = length [() | _ <- moduleEnvElts (eps_PIT eps)]
- -- This is really only right for a one-shot compile
-
- (decls_map, n_decls_slurped) = eps_decls eps
-
- n_decls_left = length [decl | (avail, True, (_,decl)) <- nameEnvElts decls_map
- -- Data, newtype, and class decls are in the decls_fm
- -- under multiple names; the tycon/class, and each
- -- constructor/class op too.
- -- The 'True' selects just the 'main' decl
- ]
-
- (insts_left, n_insts_slurped) = eps_insts eps
- n_insts_left = length (bagToList insts_left)
-
- (rules_left, n_rules_slurped) = eps_rules eps
- n_rules_left = length (bagToList rules_left)
-
- stats = vcat
- [int n_mods <+> text "interfaces read",
- hsep [ int n_decls_slurped, text "type/class/variable imported, out of",
- int (n_decls_slurped + n_decls_left), text "read"],
- hsep [ int n_insts_slurped, text "instance decls imported, out of",
- int (n_insts_slurped + n_insts_left), text "read"],
- hsep [ int n_rules_slurped, text "rule decls imported, out of",
- int (n_rules_slurped + n_rules_left), text "read"]
- ]
-\end{code}
-
-%*********************************************************
-%* *
-\subsection{Errors}
-%* *
-%*********************************************************
-
-\begin{code}
-badDataCon name
- = hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
-
-badRuleLhsErr name lhs (Just bad_e)
- = sep [ptext SLIT("Rule") <+> ftext name <> colon,
- nest 4 (vcat [ptext SLIT("Illegal expression:") <+> ppr bad_e,
- ptext SLIT("in left-hand side:") <+> ppr lhs])]
- $$
- ptext SLIT("LHS must be of form (f e1 .. en) where f is not forall'd")
-
-badRuleVar name var
- = sep [ptext SLIT("Rule") <+> doubleQuotes (ftext name) <> colon,
- ptext SLIT("Forall'd variable") <+> quotes (ppr var) <+>
- ptext SLIT("does not appear on left hand side")]
-
-emptyConDeclsErr tycon
- = sep [quotes (ppr tycon) <+> ptext SLIT("has no constructors"),
- nest 4 (ptext SLIT("(-fglasgow-exts permits this)"))]
-
-withWarning
- = sep [quotes (ptext SLIT("with")),
- ptext SLIT("is deprecated, use"),
- quotes (ptext SLIT("let")),
- ptext SLIT("instead")]
-
-badIpBinds binds
- = hang (ptext SLIT("Implicit-parameter bindings illegal in 'mdo':")) 4
- (ppr binds)
+rnSplice :: HsSplice RdrName -> RnM (HsSplice Name, FreeVars)
+rnSplice (HsSplice n expr)
+ = checkTH expr "splice" `thenM_`
+ getSrcSpanM `thenM` \ loc ->
+ newLocalsRn [L loc n] `thenM` \ [n'] ->
+ rnLExpr expr `thenM` \ (expr', fvs) ->
+ returnM (HsSplice n' expr', fvs)
\end{code}
-
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