they may be affected by renaming (which isn't fully worked out yet).
\begin{code}
-#include "HsVersions.h"
-
module RnBinds (
rnTopBinds, rnTopMonoBinds,
rnMethodBinds,
rnBinds, rnMonoBinds
) where
-IMP_Ubiq()
-#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 201
-IMPORT_DELOOPER(RnLoop) -- break the RnPass/RnExpr/RnBinds loops
-#else
+#include "HsVersions.h"
+
import {-# SOURCE #-} RnSource ( rnHsSigType )
-#endif
import HsSyn
import HsPragmas ( isNoGenPragmas, noGenPragmas )
import RnHsSyn
import RnMonad
import RnExpr ( rnMatch, rnGRHSsAndBinds, rnPat, checkPrecMatch )
-import RnEnv ( bindLocatedLocalsRn, lookupBndrRn, lookupOccRn, newLocalNames, isUnboundName )
-
+import RnEnv ( bindLocatedLocalsRn, lookupBndrRn, lookupOccRn,
+ newLocalNames, isUnboundName, warnUnusedBinds
+ )
import CmdLineOpts ( opt_SigsRequired )
import Digraph ( stronglyConnComp, SCC(..) )
-import ErrUtils ( addErrLoc, addShortErrLocLine )
import Name ( OccName(..), Provenance,
- Name {- instance Eq -},
+ Name, isExportedName,
NameSet(..), emptyNameSet, mkNameSet, unionNameSets,
minusNameSet, unionManyNameSets, elemNameSet, unitNameSet, nameSetToList
)
+import BasicTypes ( RecFlag(..), TopLevelFlag(..) )
import Maybes ( catMaybes )
-import Pretty
-import Util ( Ord3(..), thenCmp, isIn, removeDups, panic, panic#, assertPanic, assocDefault )
-import UniqSet ( SYN_IE(UniqSet) )
+import Util ( thenCmp, isIn, removeDups, panic, panic#, assertPanic, assocDefault )
+import UniqSet ( UniqSet )
import ListSetOps ( minusList )
import Bag ( bagToList )
import UniqFM ( UniqFM )
-import ErrUtils ( SYN_IE(Error) )
-import Outputable ( Outputable(..) )
+import Outputable
\end{code}
-- ToDo: Put the annotations into the monad, so that they arrive in the proper
rnTopMonoBinds mbinds sigs
= mapRn lookupBndrRn binder_rdr_names `thenRn` \ binder_names ->
let
- binder_set = mkNameSet binder_names
+ binder_set = mkNameSet binder_names
+ exported_binders = mkNameSet (filter isExportedName binder_names)
in
- rn_mono_binds True {- top level -}
+ rn_mono_binds TopLevel
binder_set mbinds sigs `thenRn` \ (new_binds, fv_set) ->
+ let
+ unused_binders = binder_set `minusNameSet` (fv_set `unionNameSets` exported_binders)
+ in
+ warnUnusedBinds unused_binders `thenRn_`
returnRn new_binds
where
binder_rdr_names = map fst (bagToList (collectMonoBinders mbinds))
= -- Extract all the binders in this group,
-- and extend current scope, inventing new names for the new binders
-- This also checks that the names form a set
- bindLocatedLocalsRn (\_ -> text "binding group") mbinders_w_srclocs $ \ new_mbinders ->
+ bindLocatedLocalsRn (text "binding group") mbinders_w_srclocs $ \ new_mbinders ->
let
binder_set = mkNameSet new_mbinders
in
- rn_mono_binds False {- not top level -}
+ rn_mono_binds NotTopLevel
binder_set mbinds sigs `thenRn` \ (binds,bind_fvs) ->
-- Now do the "thing inside", and deal with the free-variable calculations
thing_inside binds `thenRn` \ (result,result_fvs) ->
- returnRn (result, (result_fvs `unionNameSets` bind_fvs) `minusNameSet` binder_set)
+ let
+ all_fvs = result_fvs `unionNameSets` bind_fvs
+ net_fvs = all_fvs `minusNameSet` binder_set
+ unused_binders = binder_set `minusNameSet` all_fvs
+ in
+ warnUnusedBinds unused_binders `thenRn_`
+ returnRn (result, net_fvs)
where
mbinders_w_srclocs = bagToList (collectMonoBinders mbinds)
\end{code}
@rnNestedMonoBinds@ (for the nested ones).
\begin{code}
-rn_mono_binds :: Bool -- True <=> top level
+rn_mono_binds :: TopLevelFlag
-> NameSet -- Binders of this group
-> RdrNameMonoBinds
-> [RdrNameSig] -- Signatures attached to this group
-> RnMS s (RenamedHsBinds, --
FreeVars) -- Free variables
-rn_mono_binds is_top_lev binders mbinds sigs
+rn_mono_binds top_lev binders mbinds sigs
=
-- Rename the bindings, returning a MonoBindsInfo
-- which is a list of indivisible vertices so far as
-- the strongly-connected-components (SCC) analysis is concerned
- rnBindSigs is_top_lev binders sigs `thenRn` \ siglist ->
+ rnBindSigs top_lev binders sigs `thenRn` \ siglist ->
flattenMonoBinds 0 siglist mbinds `thenRn` \ (_, mbinds_info) ->
-- Do the SCC analysis
-> RenamedHsBinds
reconstructCycle (AcyclicSCC (_, _, _, binds, sigs))
- = MonoBind binds sigs nonRecursive
+ = MonoBind binds sigs NonRecursive
reconstructCycle (CyclicSCC cycle)
- = MonoBind this_gp_binds this_gp_sigs recursive
+ = MonoBind this_gp_binds this_gp_sigs Recursive
where
this_gp_binds = foldr1 AndMonoBinds [binds | (_, _, _, binds, _) <- cycle]
this_gp_sigs = foldr1 (++) [sigs | (_, _, _, _, sigs) <- cycle]
flaggery, that all top-level things have type signatures.
\begin{code}
-rnBindSigs :: Bool -- True <=> top-level binders
- -> NameSet -- Set of names bound in this group
- -> [RdrNameSig]
- -> RnMS s [RenamedSig] -- List of Sig constructors
+rnBindSigs :: TopLevelFlag
+ -> NameSet -- Set of names bound in this group
+ -> [RdrNameSig]
+ -> RnMS s [RenamedSig] -- List of Sig constructors
-rnBindSigs is_toplev binders sigs
+rnBindSigs top_lev binders sigs
= -- Rename the signatures
mapRn renameSig sigs `thenRn` \ sigs' ->
(goodies, dups) = removeDups cmp_sig (filter (not.isUnboundName.sig_name) sigs')
not_this_group = filter (\sig -> not (sig_name sig `elemNameSet` binders)) goodies
type_sig_vars = [n | Sig n _ _ <- goodies]
- un_sigd_binders
- | is_toplev && opt_SigsRequired = nameSetToList binders `minusList` type_sig_vars
- | otherwise = []
+ sigs_required = case top_lev of {TopLevel -> opt_SigsRequired; NotTopLevel -> False}
+ un_sigd_binders | sigs_required = nameSetToList binders `minusList` type_sig_vars
+ | otherwise = []
in
mapRn dupSigDeclErr dups `thenRn_`
mapRn unknownSigErr not_this_group `thenRn_`
renameSig (Sig v ty src_loc)
= pushSrcLocRn src_loc $
lookupBndrRn v `thenRn` \ new_v ->
- rnHsSigType (\ sty -> ppr sty v) ty `thenRn` \ new_ty ->
+ rnHsSigType (quotes (ppr v)) ty `thenRn` \ new_ty ->
returnRn (Sig new_v new_ty src_loc)
renameSig (SpecSig v ty using src_loc)
= pushSrcLocRn src_loc $
lookupBndrRn v `thenRn` \ new_v ->
- rnHsSigType (\ sty -> ppr sty v) ty `thenRn` \ new_ty ->
+ rnHsSigType (quotes (ppr v)) ty `thenRn` \ new_ty ->
rn_using using `thenRn` \ new_using ->
returnRn (SpecSig new_v new_ty new_using src_loc)
where
lookupBndrRn v `thenRn` \ new_v ->
returnRn (InlineSig new_v src_loc)
-renameSig (DeforestSig v src_loc)
- = pushSrcLocRn src_loc $
- lookupBndrRn v `thenRn` \ new_v ->
- returnRn (DeforestSig new_v src_loc)
-
renameSig (MagicUnfoldingSig v str src_loc)
= pushSrcLocRn src_loc $
lookupBndrRn v `thenRn` \ new_v ->
Checking for distinct signatures; oh, so boring
\begin{code}
-cmp_sig :: RenamedSig -> RenamedSig -> TAG_
-cmp_sig (Sig n1 _ _) (Sig n2 _ _) = n1 `cmp` n2
-cmp_sig (InlineSig n1 _) (InlineSig n2 _) = n1 `cmp` n2
-cmp_sig (MagicUnfoldingSig n1 _ _) (MagicUnfoldingSig n2 _ _) = n1 `cmp` n2
+cmp_sig :: RenamedSig -> RenamedSig -> Ordering
+cmp_sig (Sig n1 _ _) (Sig n2 _ _) = n1 `compare` n2
+cmp_sig (InlineSig n1 _) (InlineSig n2 _) = n1 `compare` n2
+cmp_sig (MagicUnfoldingSig n1 _ _) (MagicUnfoldingSig n2 _ _) = n1 `compare` n2
cmp_sig (SpecSig n1 ty1 _ _) (SpecSig n2 ty2 _ _)
= -- may have many specialisations for one value;
-- but not ones that are exactly the same...
- thenCmp (n1 `cmp` n2) (cmpHsType cmp ty1 ty2)
+ thenCmp (n1 `compare` n2) (cmpHsType compare ty1 ty2)
cmp_sig other_1 other_2 -- Tags *must* be different
- | (sig_tag other_1) _LT_ (sig_tag other_2) = LT_
- | otherwise = GT_
+ | (sig_tag other_1) _LT_ (sig_tag other_2) = LT
+ | otherwise = GT
sig_tag (Sig n1 _ _) = (ILIT(1) :: FAST_INT)
sig_tag (SpecSig n1 _ _ _) = ILIT(2)
sig_tag (InlineSig n1 _) = ILIT(3)
sig_tag (MagicUnfoldingSig n1 _ _) = ILIT(4)
-sig_tag (DeforestSig n1 _) = ILIT(5)
sig_tag _ = panic# "tag(RnBinds)"
sig_name (Sig n _ _) = n
\begin{code}
dupSigDeclErr (sig:sigs)
= pushSrcLocRn loc $
- addErrRn (\sty -> sep [ptext SLIT("more than one"),
- ptext what_it_is, ptext SLIT("given for"),
- ppr sty (sig_name sig)])
+ addErrRn (sep [ptext SLIT("more than one"),
+ ptext what_it_is, ptext SLIT("given for"),
+ quotes (ppr (sig_name sig))])
where
(what_it_is, loc) = sig_doc sig
unknownSigErr sig
= pushSrcLocRn loc $
- addErrRn (\sty -> sep [ptext flavour, ptext SLIT("but no definition for"),
- ppr sty (sig_name sig)])
+ addErrRn (sep [ptext flavour, ptext SLIT("but no definition for"),
+ quotes (ppr (sig_name sig))])
where
(flavour, loc) = sig_doc sig
sig_doc (InlineSig _ loc) = (SLIT("INLINE pragma"),loc)
sig_doc (MagicUnfoldingSig _ _ loc) = (SLIT("MAGIC_UNFOLDING pragma"),loc)
-missingSigErr var sty
- = sep [ptext SLIT("a definition but no type signature for"), ppr sty var]
+missingSigErr var
+ = sep [ptext SLIT("Definition but no type signature for"), quotes (ppr var)]
-methodBindErr mbind sty
+methodBindErr mbind
= hang (ptext SLIT("Can't handle multiple methods defined by one pattern binding"))
- 4 (ppr sty mbind)
+ 4 (ppr mbind)
\end{code}
projects / ghc-hetmet.git / blobdiff