\section[RnSource]{Main pass of renamer}
\begin{code}
-module RnSource ( rnDecl, rnSourceDecls, rnHsType, rnHsSigType, rnHsPolyType ) where
+module RnSource ( rnDecl, rnSourceDecls, rnHsType, rnHsSigType ) where
#include "HsVersions.h"
import RnExpr
import HsSyn
import HsPragmas
-import HsTypes ( getTyVarName, pprHsPred, cmpHsTypes )
-import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, isRdrTyVar )
+import HsTypes ( getTyVarName, pprHsContext )
+import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, isRdrTyVar, mkRdrNameWkr )
import RdrHsSyn ( RdrNameContext, RdrNameHsType, RdrNameConDecl,
- extractRuleBndrsTyVars, extractHsTyRdrTyVars, extractHsTysRdrTyVars
+ extractRuleBndrsTyVars, extractHsTyRdrTyVars,
+ extractHsTysRdrTyVars, extractHsCtxtRdrTyVars
)
import RnHsSyn
import HsCore
import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs, unknownSigErr )
import RnEnv ( bindTyVarsRn, lookupBndrRn, lookupOccRn, getIPName,
- lookupImplicitOccRn,
+ lookupImplicitOccRn, lookupImplicitOccsRn,
bindLocalsRn, bindLocalRn, bindLocalsFVRn, bindUVarRn,
bindTyVarsFVRn, bindTyVarsFV2Rn, extendTyVarEnvFVRn,
bindCoreLocalFVRn, bindCoreLocalsFVRn,
checkDupOrQualNames, checkDupNames,
mkImportedGlobalName, mkImportedGlobalFromRdrName,
newDFunName, getDFunKey, newImplicitBinder,
- FreeVars, emptyFVs, plusFV, plusFVs, unitFV, addOneFV, mapFvRn
+ FreeVars, emptyFVs, plusFV, plusFVs, unitFV,
+ addOneFV, mapFvRn
)
import RnMonad
import FunDeps ( oclose )
+import Class ( FunDep )
import Name ( Name, OccName,
ExportFlag(..), Provenance(..),
)
import NameSet
import OccName ( mkDefaultMethodOcc )
-import BasicTypes ( TopLevelFlag(..) )
import FiniteMap ( elemFM )
-import PrelInfo ( derivableClassKeys,
- deRefStablePtr_NAME, makeStablePtr_NAME, bindIO_NAME
+import PrelInfo ( derivableClassKeys, cCallishClassKeys,
+ deRefStablePtr_RDR, makeStablePtr_RDR,
+ bindIO_RDR, returnIO_RDR
)
import Bag ( bagToList )
import List ( partition, nub )
import SrcLoc ( SrcLoc )
import CmdLineOpts ( opt_GlasgowExts, opt_WarnUnusedMatches ) -- Warn of unused for-all'd tyvars
import Unique ( Uniquable(..) )
-import UniqFM ( lookupUFM )
import ErrUtils ( Message )
import CStrings ( isCLabelString )
import Maybes ( maybeToBool, catMaybes )
rnSourceDecls decls
= go emptyFVs [] decls
where
- -- Fixity decls have been dealt with already; ignore them
- go fvs ds' [] = returnRn (ds', fvs)
- go fvs ds' (FixD _:ds) = go fvs ds' ds
- go fvs ds' (d:ds) = rnDecl d `thenRn` \(d', fvs') ->
- go (fvs `plusFV` fvs') (d':ds') ds
+ -- Fixity and deprecations have been dealt with already; ignore them
+ go fvs ds' [] = returnRn (ds', fvs)
+ go fvs ds' (FixD _:ds) = go fvs ds' ds
+ go fvs ds' (DeprecD _:ds) = go fvs ds' ds
+ go fvs ds' (d:ds) = rnDecl d `thenRn` \(d', fvs') ->
+ go (fvs `plusFV` fvs') (d':ds') ds
\end{code}
rnDecl (SigD (IfaceSig name ty id_infos loc))
= pushSrcLocRn loc $
- lookupBndrRn name `thenRn` \ name' ->
- rnHsPolyType doc_str ty `thenRn` \ (ty',fvs1) ->
- mapFvRn rnIdInfo id_infos `thenRn` \ (id_infos', fvs2) ->
+ mkImportedGlobalFromRdrName name `thenRn` \ name' ->
+ rnHsType doc_str ty `thenRn` \ (ty',fvs1) ->
+ mapFvRn rnIdInfo id_infos `thenRn` \ (id_infos', fvs2) ->
returnRn (SigD (IfaceSig name' ty' id_infos' loc), fvs1 `plusFV` fvs2)
where
doc_str = text "the interface signature for" <+> quotes (ppr name)
However, we can also do some scoping checks at the same time.
\begin{code}
-rnDecl (TyClD (TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc))
+rnDecl (TyClD (TyData new_or_data context tycon tyvars condecls nconstrs derivings pragmas src_loc))
= pushSrcLocRn src_loc $
lookupBndrRn tycon `thenRn` \ tycon' ->
bindTyVarsFVRn data_doc tyvars $ \ tyvars' ->
mapFvRn rnConDecl condecls `thenRn` \ (condecls', con_fvs) ->
rnDerivs derivings `thenRn` \ (derivings', deriv_fvs) ->
ASSERT(isNoDataPragmas pragmas)
- returnRn (TyClD (TyData new_or_data context' tycon' tyvars' condecls'
+ returnRn (TyClD (TyData new_or_data context' tycon' tyvars' condecls' nconstrs
derivings' noDataPragmas src_loc),
cxt_fvs `plusFV` con_fvs `plusFV` deriv_fvs)
where
= pushSrcLocRn src_loc $
lookupBndrRn name `thenRn` \ name' ->
bindTyVarsFVRn syn_doc tyvars $ \ tyvars' ->
- rnHsPolyType syn_doc (unquantify ty) `thenRn` \ (ty', ty_fvs) ->
+ rnHsType syn_doc (unquantify ty) `thenRn` \ (ty', ty_fvs) ->
returnRn (TyClD (TySynonym name' tyvars' ty' src_loc), ty_fvs)
where
syn_doc = text "the declaration for type synonym" <+> quotes (ppr name)
let
-- First process the class op sigs, then the fixity sigs.
(op_sigs, non_op_sigs) = partition isClassOpSig sigs
- (fix_sigs, non_sigs) = partition isFixitySig non_op_sigs
in
- checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_`
- mapFvRn (rn_op cname' clas_tyvar_names fds') op_sigs
- `thenRn` \ (sigs', sig_fvs) ->
- mapRn_ (unknownSigErr) non_sigs `thenRn_`
+ checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_`
+ mapFvRn (rn_op cname' clas_tyvar_names fds') op_sigs `thenRn` \ (sigs', sig_fvs) ->
let
binders = mkNameSet [ nm | (ClassOpSig nm _ _ _ _) <- sigs' ]
in
- renameSigs False binders lookupOccRn fix_sigs
- `thenRn` \ (fixs', fix_fvs) ->
+ renameSigs (okClsDclSig binders) non_op_sigs `thenRn` \ (non_ops', fix_fvs) ->
-- Check the methods
checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenRn_`
-- for instance decls.
ASSERT(isNoClassPragmas pragmas)
- returnRn (TyClD (ClassDecl context' cname' tyvars' fds' (fixs' ++ sigs') mbinds'
+ returnRn (TyClD (ClassDecl context' cname' tyvars' fds' (non_ops' ++ sigs') mbinds'
NoClassPragmas tname' dname' dwname' snames' src_loc),
sig_fvs `plusFV`
fix_fvs `plusFV`
) `thenRn` \ (mbinds', meth_fvs) ->
let
binders = mkNameSet (map fst (bagToList (collectMonoBinders mbinds')))
-
- -- Delete sigs (&report) sigs that aren't allowed inside an
- -- instance decl:
- --
- -- + type signatures
- -- + fixity decls
- --
- (ok_sigs, not_ok_idecl_sigs) = partition okInInstDecl uprags
-
- okInInstDecl (FixSig _) = False
- okInInstDecl (Sig _ _ _) = False
- okInInstDecl _ = True
-
in
- -- You can't have fixity decls & type signatures
- -- within an instance declaration.
- mapRn_ unknownSigErr not_ok_idecl_sigs `thenRn_`
-
-- Rename the prags and signatures.
-- Note that the type variables are not in scope here,
-- so that instance Eq a => Eq (T a) where
-- {-# SPECIALISE instance Eq a => Eq (T [a]) #-}
-- works OK.
- renameSigs False binders lookupOccRn ok_sigs `thenRn` \ (new_uprags, prag_fvs) ->
+ renameSigs (okInstDclSig binders) uprags `thenRn` \ (new_uprags, prag_fvs) ->
getModeRn `thenRn` \ mode ->
(case mode of
= pushSrcLocRn src_loc $
lookupOccRn name `thenRn` \ name' ->
let
- ok_ext_nm Dynamic = True
- ok_ext_nm (ExtName nm (Just mb)) = isCLabelString nm && isCLabelString mb
- ok_ext_nm (ExtName nm Nothing) = isCLabelString nm
-
- fvs1 = case imp_exp of
- FoImport _ | not isDyn -> emptyFVs
- FoLabel -> emptyFVs
- FoExport | isDyn -> mkNameSet [makeStablePtr_NAME,
- deRefStablePtr_NAME,
- bindIO_NAME]
- | otherwise -> mkNameSet [name']
- _ -> emptyFVs
+ extra_fvs FoExport
+ | isDyn =
+ lookupImplicitOccsRn [makeStablePtr_RDR, deRefStablePtr_RDR,
+ bindIO_RDR, returnIO_RDR]
+ | otherwise =
+ lookupImplicitOccsRn [bindIO_RDR, returnIO_RDR] `thenRn` \ fvs ->
+ returnRn (addOneFV fvs name')
+ extra_fvs other = returnRn emptyFVs
in
checkRn (ok_ext_nm ext_nm) (badExtName ext_nm) `thenRn_`
+
+ extra_fvs imp_exp `thenRn` \ fvs1 ->
+
rnHsSigType fo_decl_msg ty `thenRn` \ (ty', fvs2) ->
returnRn (ForD (ForeignDecl name' imp_exp ty' ext_nm cconv src_loc),
fvs1 `plusFV` fvs2)
where
fo_decl_msg = ptext SLIT("a foreign declaration")
isDyn = isDynamicExtName ext_nm
+
+ ok_ext_nm Dynamic = True
+ ok_ext_nm (ExtName nm (Just mb)) = isCLabelString nm && isCLabelString mb
+ ok_ext_nm (ExtName nm Nothing) = isCLabelString nm
\end{code}
%*********************************************************
%*********************************************************
\begin{code}
-rnDecl (RuleD (IfaceRuleDecl var body src_loc))
- = pushSrcLocRn src_loc $
- lookupOccRn var `thenRn` \ var' ->
- rnRuleBody body `thenRn` \ (body', fvs) ->
- returnRn (RuleD (IfaceRuleDecl var' body' src_loc), fvs `addOneFV` var')
+rnDecl (RuleD (IfaceRule rule_name vars fn args rhs src_loc))
+ = pushSrcLocRn src_loc $
+ lookupOccRn fn `thenRn` \ fn' ->
+ rnCoreBndrs vars $ \ vars' ->
+ mapFvRn rnCoreExpr args `thenRn` \ (args', fvs1) ->
+ rnCoreExpr rhs `thenRn` \ (rhs', fvs2) ->
+ returnRn (RuleD (IfaceRule rule_name vars' fn' args' rhs' src_loc),
+ (fvs1 `plusFV` fvs2) `addOneFV` fn')
+
+rnDecl (RuleD (IfaceRuleOut fn rule))
+ -- This one is used for BuiltInRules
+ -- The rule itself is already done, but the thing
+ -- to attach it to is not.
+ = lookupOccRn fn `thenRn` \ fn' ->
+ returnRn (RuleD (IfaceRuleOut fn' rule), unitFV fn')
-rnDecl (RuleD (RuleDecl rule_name tvs vars lhs rhs src_loc))
+rnDecl (RuleD (HsRule rule_name tvs vars lhs rhs src_loc))
= ASSERT( null tvs )
pushSrcLocRn src_loc $
bad_vars = [var | var <- ids, not (var `elemNameSet` fv_lhs)]
in
mapRn (addErrRn . badRuleVar rule_name) bad_vars `thenRn_`
- returnRn (RuleD (RuleDecl rule_name sig_tvs' vars' lhs' rhs' src_loc),
+ returnRn (RuleD (HsRule rule_name sig_tvs' vars' lhs' rhs' src_loc),
fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
where
doc = text "the transformation rule" <+> ptext rule_name
get_var (RuleBndrSig v _) = v
rn_var (RuleBndr v, id) = returnRn (RuleBndr id, emptyFVs)
- rn_var (RuleBndrSig v t, id) = rnHsPolyType doc t `thenRn` \ (t', fvs) ->
+ rn_var (RuleBndrSig v t, id) = rnHsType doc t `thenRn` \ (t', fvs) ->
returnRn (RuleBndrSig id t', fvs)
\end{code}
returnRn (InfixCon new_ty1 new_ty2, fvs1 `plusFV` fvs2)
rnConDetails doc locn (NewCon ty mb_field)
- = rnHsPolyType doc ty `thenRn` \ (new_ty, fvs) ->
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
rn_field mb_field `thenRn` \ new_mb_field ->
returnRn (NewCon new_ty new_mb_field, fvs)
where
returnRn ((new_names, new_ty), fvs)
rnBangTy doc (Banged ty)
- = rnHsPolyType doc ty `thenRn` \ (new_ty, fvs) ->
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
returnRn (Banged new_ty, fvs)
rnBangTy doc (Unbanged ty)
- = rnHsPolyType doc ty `thenRn` \ (new_ty, fvs) ->
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
returnRn (Unbanged new_ty, fvs)
rnBangTy doc (Unpacked ty)
- = rnHsPolyType doc ty `thenRn` \ (new_ty, fvs) ->
+ = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
returnRn (Unpacked new_ty, fvs)
-- This data decl will parse OK
-- rnHsSigType is used for source-language type signatures,
-- which use *implicit* universal quantification.
rnHsSigType doc_str ty
- = rnHsPolyType (text "the type signature for" <+> doc_str) ty
+ = rnHsType (text "the type signature for" <+> doc_str) ty
---------------------------------------
-rnHsPolyType, rnHsType :: SDoc -> RdrNameHsType -> RnMS (RenamedHsType, FreeVars)
--- rnHsPolyType is prepared to see a for-all; rnHsType is not
--- The former is called for the top level of type sigs and function args.
+rnHsType :: SDoc -> RdrNameHsType -> RnMS (RenamedHsType, FreeVars)
----------------------------------------
-rnHsPolyType doc (HsForAllTy Nothing ctxt ty)
+rnHsType doc (HsForAllTy Nothing ctxt ty)
-- Implicit quantifiction in source code (no kinds on tyvars)
-- Given the signature C => T we universally quantify
-- over FV(T) \ {in-scope-tyvars}
= getLocalNameEnv `thenRn` \ name_env ->
let
- mentioned_in_tau = extractHsTyRdrTyVars ty
- forall_tyvars = filter (not . (`elemFM` name_env)) mentioned_in_tau
+ mentioned_in_tau = extractHsTyRdrTyVars ty
+ mentioned_in_ctxt = extractHsCtxtRdrTyVars ctxt
+ mentioned = nub (mentioned_in_tau ++ mentioned_in_ctxt)
+ forall_tyvars = filter (not . (`elemFM` name_env)) mentioned
in
- checkConstraints doc forall_tyvars mentioned_in_tau ctxt ty `thenRn` \ ctxt' ->
- rnForAll doc (map UserTyVar forall_tyvars) ctxt' ty
+ rnForAll doc (map UserTyVar forall_tyvars) ctxt ty
-rnHsPolyType doc (HsForAllTy (Just forall_tyvars) ctxt tau)
+rnHsType doc (HsForAllTy (Just forall_tyvars) ctxt tau)
-- Explicit quantification.
- -- Check that the forall'd tyvars are a subset of the
- -- free tyvars in the tau-type part
- -- That's only a warning... unless the tyvar is constrained by a
- -- context in which case it's an error
+ -- Check that the forall'd tyvars are actually
+ -- mentioned in the type, and produce a warning if not
= let
- mentioned_in_tau = extractHsTyRdrTyVars tau
- mentioned_in_ctxt = nub [tv | p <- ctxt,
- ty <- tys_of_pred p,
- tv <- extractHsTyRdrTyVars ty]
- tys_of_pred (HsPClass clas tys) = tys
- tys_of_pred (HsPIParam n ty) = [ty]
-
- dubious_guys = filter (`notElem` mentioned_in_tau) forall_tyvar_names
- -- dubious = explicitly quantified but not mentioned in tau type
-
- (bad_guys, warn_guys) = partition (`elem` mentioned_in_ctxt) dubious_guys
- -- bad = explicitly quantified and constrained, but not mentioned in tau
- -- warn = explicitly quantified but not mentioned in ctxt or tau
-
- forall_tyvar_names = map getTyVarName forall_tyvars
+ mentioned_in_tau = extractHsTyRdrTyVars tau
+ mentioned_in_ctxt = extractHsCtxtRdrTyVars ctxt
+ mentioned = nub (mentioned_in_tau ++ mentioned_in_ctxt)
+ forall_tyvar_names = map getTyVarName forall_tyvars
+
+ -- Explicitly quantified but not mentioned in ctxt or tau
+ warn_guys = filter (`notElem` mentioned) forall_tyvar_names
in
- -- mapRn_ (forAllErr doc tau) bad_guys `thenRn_`
- mapRn_ (forAllWarn doc tau) warn_guys `thenRn_`
- checkConstraints doc forall_tyvar_names mentioned_in_tau ctxt tau `thenRn` \ ctxt' ->
- rnForAll doc forall_tyvars ctxt' tau
+ mapRn_ (forAllWarn doc tau) warn_guys `thenRn_`
+ rnForAll doc forall_tyvars ctxt tau
+
+rnHsType doc (HsTyVar tyvar)
+ = lookupOccRn tyvar `thenRn` \ tyvar' ->
+ returnRn (HsTyVar tyvar', unitFV tyvar')
-rnHsPolyType doc other_ty = rnHsType doc other_ty
+rnHsType doc (HsFunTy ty1 ty2)
+ = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
+ -- Might find a for-all as the arg of a function type
+ rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
+ -- Or as the result. This happens when reading Prelude.hi
+ -- when we find return :: forall m. Monad m -> forall a. a -> m a
+ returnRn (HsFunTy ty1' ty2', fvs1 `plusFV` fvs2)
+rnHsType doc (HsListTy ty)
+ = rnHsType doc ty `thenRn` \ (ty', fvs) ->
+ returnRn (HsListTy ty', fvs `addOneFV` listTyCon_name)
+
+-- Unboxed tuples are allowed to have poly-typed arguments. These
+-- sometimes crop up as a result of CPR worker-wrappering dictionaries.
+rnHsType doc (HsTupleTy (HsTupCon _ boxity) tys)
+ -- Don't do lookupOccRn, because this is built-in syntax
+ -- so it doesn't need to be in scope
+ = mapFvRn (rnHsType doc) tys `thenRn` \ (tys', fvs) ->
+ returnRn (HsTupleTy (HsTupCon n' boxity) tys', fvs `addOneFV` n')
+ where
+ n' = tupleTyCon_name boxity (length tys)
+
+
+rnHsType doc (HsAppTy ty1 ty2)
+ = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
+ rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
+ returnRn (HsAppTy ty1' ty2', fvs1 `plusFV` fvs2)
+rnHsType doc (HsPredTy pred)
+ = rnPred doc pred `thenRn` \ (pred', fvs) ->
+ returnRn (HsPredTy pred', fvs)
+
+rnHsType doc (HsUsgForAllTy uv_rdr ty)
+ = bindUVarRn doc uv_rdr $ \ uv_name ->
+ rnHsType doc ty `thenRn` \ (ty', fvs) ->
+ returnRn (HsUsgForAllTy uv_name ty',
+ fvs )
+
+rnHsType doc (HsUsgTy usg ty)
+ = newUsg usg `thenRn` \ (usg', usg_fvs) ->
+ rnHsType doc ty `thenRn` \ (ty', ty_fvs) ->
+ -- A for-all can occur inside a usage annotation
+ returnRn (HsUsgTy usg' ty',
+ usg_fvs `plusFV` ty_fvs)
+ where
+ newUsg usg = case usg of
+ HsUsOnce -> returnRn (HsUsOnce, emptyFVs)
+ HsUsMany -> returnRn (HsUsMany, emptyFVs)
+ HsUsVar uv_rdr -> lookupOccRn uv_rdr `thenRn` \ uv_name ->
+ returnRn (HsUsVar uv_name, emptyFVs)
+
+rnHsTypes doc tys = mapFvRn (rnHsType doc) tys
+\end{code}
+
+\begin{code}
+-- We use lookupOcc here because this is interface file only stuff
+-- and we need the workers...
+rnHsTupCon (HsTupCon n boxity)
+ = lookupOccRn n `thenRn` \ n' ->
+ returnRn (HsTupCon n' boxity, unitFV n')
+
+rnHsTupConWkr (HsTupCon n boxity)
+ -- Tuple construtors are for the *worker* of the tuple
+ -- Going direct saves needless messing about
+ = lookupOccRn (mkRdrNameWkr n) `thenRn` \ n' ->
+ returnRn (HsTupCon n' boxity, unitFV n')
+\end{code}
+
+\begin{code}
-- Check that each constraint mentions at least one of the forall'd type variables
-- Since the forall'd type variables are a subset of the free tyvars
-- of the tau-type part, this guarantees that every constraint mentions
rnHsType doc ty `thenRn` \ (new_ty, ty_fvs) ->
returnRn (mkHsForAllTy (Just new_tyvars) new_ctxt new_ty,
cxt_fvs `plusFV` ty_fvs)
-
----------------------------------------
-rnHsType doc ty@(HsForAllTy _ _ inner_ty)
- = addWarnRn (unexpectedForAllTy ty) `thenRn_`
- rnHsPolyType doc ty
-
-rnHsType doc (MonoTyVar tyvar)
- = lookupOccRn tyvar `thenRn` \ tyvar' ->
- returnRn (MonoTyVar tyvar', unitFV tyvar')
-
-rnHsType doc (MonoFunTy ty1 ty2)
- = rnHsPolyType doc ty1 `thenRn` \ (ty1', fvs1) ->
- -- Might find a for-all as the arg of a function type
- rnHsPolyType doc ty2 `thenRn` \ (ty2', fvs2) ->
- -- Or as the result. This happens when reading Prelude.hi
- -- when we find return :: forall m. Monad m -> forall a. a -> m a
- returnRn (MonoFunTy ty1' ty2', fvs1 `plusFV` fvs2)
-
-rnHsType doc (MonoListTy ty)
- = rnHsType doc ty `thenRn` \ (ty', fvs) ->
- returnRn (MonoListTy ty', fvs `addOneFV` listTyCon_name)
-
--- Unboxed tuples are allowed to have poly-typed arguments. These
--- sometimes crop up as a result of CPR worker-wrappering dictionaries.
-rnHsType doc (MonoTupleTy tys boxed)
- = (if boxed
- then mapFvRn (rnHsType doc) tys
- else mapFvRn (rnHsPolyType doc) tys) `thenRn` \ (tys', fvs) ->
- returnRn (MonoTupleTy tys' boxed, fvs `addOneFV` tup_con_name)
- where
- tup_con_name = tupleTyCon_name boxed (length tys)
-
-rnHsType doc (MonoTyApp ty1 ty2)
- = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
- rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
- returnRn (MonoTyApp ty1' ty2', fvs1 `plusFV` fvs2)
-
-rnHsType doc (MonoIParamTy n ty)
- = getIPName n `thenRn` \ name ->
- rnHsType doc ty `thenRn` \ (ty', fvs) ->
- returnRn (MonoIParamTy name ty', fvs)
-
-rnHsType doc (MonoDictTy clas tys)
- = lookupOccRn clas `thenRn` \ clas' ->
- rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
- returnRn (MonoDictTy clas' tys', fvs `addOneFV` clas')
-
-rnHsType doc (MonoUsgForAllTy uv_rdr ty)
- = bindUVarRn doc uv_rdr $ \ uv_name ->
- rnHsType doc ty `thenRn` \ (ty', fvs) ->
- returnRn (MonoUsgForAllTy uv_name ty',
- fvs )
-
-rnHsType doc (MonoUsgTy usg ty)
- = newUsg usg `thenRn` \ (usg', usg_fvs) ->
- rnHsPolyType doc ty `thenRn` \ (ty', ty_fvs) ->
- -- A for-all can occur inside a usage annotation
- returnRn (MonoUsgTy usg' ty',
- usg_fvs `plusFV` ty_fvs)
- where
- newUsg usg = case usg of
- MonoUsOnce -> returnRn (MonoUsOnce, emptyFVs)
- MonoUsMany -> returnRn (MonoUsMany, emptyFVs)
- MonoUsVar uv_rdr -> lookupOccRn uv_rdr `thenRn` \ uv_name ->
- returnRn (MonoUsVar uv_name, emptyFVs)
-
-rnHsTypes doc tys = mapFvRn (rnHsType doc) tys
\end{code}
-
\begin{code}
rnContext :: SDoc -> RdrNameContext -> RnMS (RenamedContext, FreeVars)
-
rnContext doc ctxt
- = mapAndUnzipRn (rnPred doc) ctxt `thenRn` \ (theta, fvs_s) ->
+ = mapAndUnzipRn rn_pred ctxt `thenRn` \ (theta, fvs_s) ->
let
- (_, dup_asserts) = removeDups (cmpHsPred compare) theta
+ (_, dups) = removeDupsEq theta
+ -- We only have equality, not ordering
in
-- Check for duplicate assertions
-- If this isn't an error, then it ought to be:
- mapRn_ (addWarnRn . dupClassAssertWarn theta) dup_asserts `thenRn_`
-
+ mapRn (addWarnRn . dupClassAssertWarn theta) dups `thenRn_`
returnRn (theta, plusFVs fvs_s)
+ where
+ --Someone discovered that @CCallable@ and @CReturnable@
+ -- could be used in contexts such as:
+ -- foo :: CCallable a => a -> PrimIO Int
+ -- Doing this utterly wrecks the whole point of introducing these
+ -- classes so we specifically check that this isn't being done.
+ rn_pred pred = rnPred doc pred `thenRn` \ (pred', fvs)->
+ checkRn (not (bad_pred pred'))
+ (naughtyCCallContextErr pred') `thenRn_`
+ returnRn (pred', fvs)
+
+ bad_pred (HsPClass clas _) = getUnique clas `elem` cCallishClassKeys
+ bad_pred other = False
+
rnPred doc (HsPClass clas tys)
= lookupOccRn clas `thenRn` \ clas_name ->
rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
returnRn (HsPClass clas_name tys', fvs `addOneFV` clas_name)
+
rnPred doc (HsPIParam n ty)
= getIPName n `thenRn` \ name ->
rnHsType doc ty `thenRn` \ (ty', fvs) ->
\end{code}
\begin{code}
-rnFds :: SDoc -> [([RdrName],[RdrName])] -> RnMS ([([Name],[Name])], FreeVars)
+rnFds :: SDoc -> [FunDep RdrName] -> RnMS ([FunDep Name], FreeVars)
rnFds doc fds
= mapAndUnzipRn rn_fds fds `thenRn` \ (theta, fvs_s) ->
rnIdInfo (HsUpdate update) = returnRn (HsUpdate update, emptyFVs)
rnIdInfo HsNoCafRefs = returnRn (HsNoCafRefs, emptyFVs)
rnIdInfo HsCprInfo = returnRn (HsCprInfo, emptyFVs)
-rnIdInfo (HsSpecialise rule_body) = rnRuleBody rule_body
- `thenRn` \ (rule_body', fvs) ->
- returnRn (HsSpecialise rule_body', fvs)
-rnRuleBody (UfRuleBody str vars args rhs)
- = rnCoreBndrs vars $ \ vars' ->
- mapFvRn rnCoreExpr args `thenRn` \ (args', fvs1) ->
- rnCoreExpr rhs `thenRn` \ (rhs', fvs2) ->
- returnRn (UfRuleBody str vars' args' rhs', fvs1 `plusFV` fvs2)
\end{code}
@UfCore@ expressions.
\begin{code}
rnCoreExpr (UfType ty)
- = rnHsPolyType (text "unfolding type") ty `thenRn` \ (ty', fvs) ->
+ = rnHsType (text "unfolding type") ty `thenRn` \ (ty', fvs) ->
returnRn (UfType ty', fvs)
rnCoreExpr (UfVar v)
returnRn (UfLitLit l ty', fvs)
rnCoreExpr (UfCCall cc ty)
- = rnHsPolyType (text "ccall") ty `thenRn` \ (ty', fvs) ->
+ = rnHsType (text "ccall") ty `thenRn` \ (ty', fvs) ->
returnRn (UfCCall cc ty', fvs)
rnCoreExpr (UfTuple con args)
- = lookupOccRn con `thenRn` \ con' ->
- mapFvRn rnCoreExpr args `thenRn` \ (args', fvs) ->
- returnRn (UfTuple con' args', fvs `addOneFV` con')
+ = rnHsTupConWkr con `thenRn` \ (con', fvs1) ->
+ mapFvRn rnCoreExpr args `thenRn` \ (args', fvs2) ->
+ returnRn (UfTuple con' args', fvs1 `plusFV` fvs2)
rnCoreExpr (UfApp fun arg)
= rnCoreExpr fun `thenRn` \ (fun', fv1) ->
\begin{code}
rnCoreBndr (UfValBinder name ty) thing_inside
- = rnHsPolyType doc ty `thenRn` \ (ty', fvs1) ->
+ = rnHsType doc ty `thenRn` \ (ty', fvs1) ->
bindCoreLocalFVRn name ( \ name' ->
thing_inside (UfValBinder name' ty')
) `thenRn` \ (result, fvs2) ->
\begin{code}
rnCoreAlt (con, bndrs, rhs)
- = rnUfCon con `thenRn` \ (con', fvs1) ->
+ = rnUfCon con bndrs `thenRn` \ (con', fvs1) ->
bindCoreLocalsFVRn bndrs ( \ bndrs' ->
rnCoreExpr rhs `thenRn` \ (rhs', fvs2) ->
returnRn ((con', bndrs', rhs'), fvs2)
returnRn (result, fvs1 `plusFV` fvs3)
rnNote (UfCoerce ty)
- = rnHsPolyType (text "unfolding coerce") ty `thenRn` \ (ty', fvs) ->
+ = rnHsType (text "unfolding coerce") ty `thenRn` \ (ty', fvs) ->
returnRn (UfCoerce ty', fvs)
rnNote (UfSCC cc) = returnRn (UfSCC cc, emptyFVs)
rnNote UfInlineMe = returnRn (UfInlineMe, emptyFVs)
-rnUfCon UfDefault
+rnUfCon UfDefault _
= returnRn (UfDefault, emptyFVs)
-rnUfCon (UfDataAlt con)
+rnUfCon (UfTupleAlt tup_con) bndrs
+ = rnHsTupCon tup_con `thenRn` \ (HsTupCon con' _, fvs) ->
+ returnRn (UfDataAlt con', fvs)
+ -- Makes the type checker a little easier
+
+rnUfCon (UfDataAlt con) _
= lookupOccRn con `thenRn` \ con' ->
returnRn (UfDataAlt con', unitFV con')
-rnUfCon (UfLitAlt lit)
+rnUfCon (UfLitAlt lit) _
= returnRn (UfLitAlt lit, emptyFVs)
-rnUfCon (UfLitLitAlt lit ty)
- = rnHsPolyType (text "litlit") ty `thenRn` \ (ty', fvs) ->
+rnUfCon (UfLitLitAlt lit ty) _
+ = rnHsType (text "litlit") ty `thenRn` \ (ty', fvs) ->
returnRn (UfLitLitAlt lit ty', fvs)
\end{code}
ptext SLIT("does not appear in method signature")])
4 (ppr sig)
-dupClassAssertWarn ctxt (assertion : dups)
- = sep [hsep [ptext SLIT("Duplicate class assertion"),
- quotes (pprHsPred assertion),
- ptext SLIT("in the context:")],
- nest 4 (pprHsContext ctxt <+> ptext SLIT("..."))]
-
badDataCon name
= hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
univErr doc constraint ty
= sep [ptext SLIT("All of the type variable(s) in the constraint")
- <+> quotes (pprHsPred constraint)
+ <+> quotes (ppr constraint)
<+> ptext SLIT("are already in scope"),
nest 4 (ptext SLIT("At least one must be universally quantified here"))
]
$$
(ptext SLIT("In") <+> doc)
-ambigErr doc constraint ty
- = sep [ptext SLIT("Ambiguous constraint") <+> quotes (pprHsPred constraint),
- nest 4 (ptext SLIT("in the type:") <+> ppr ty),
- nest 4 (ptext SLIT("Each forall-d type variable mentioned by the constraint must appear after the =>."))]
- $$
- (ptext SLIT("In") <+> doc)
-
-unexpectedForAllTy ty
- = ptext SLIT("Unexpected forall type:") <+> ppr ty
-
badRuleLhsErr name lhs
= sep [ptext SLIT("Rule") <+> ptext name <> colon,
nest 4 (ptext SLIT("Illegal left-hand side:") <+> ppr lhs)]
badExtName :: ExtName -> Message
badExtName ext_nm
= sep [quotes (ppr ext_nm) <+> ptext SLIT("is not a valid C identifier")]
+
+dupClassAssertWarn ctxt (assertion : dups)
+ = sep [hsep [ptext SLIT("Duplicate class assertion"),
+ quotes (ppr assertion),
+ ptext SLIT("in the context:")],
+ nest 4 (pprHsContext ctxt <+> ptext SLIT("..."))]
+
+naughtyCCallContextErr (HsPClass clas _)
+ = sep [ptext SLIT("Can't use class") <+> quotes (ppr clas),
+ ptext SLIT("in a context")]
\end{code}
projects / ghc-hetmet.git / blobdiff