X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnBinds.lhs;h=e77785956361377c50742f05b90d6bca591104f3;hb=8f0c89cbbbad60c4f05356fcb9053b7ed0c18075;hp=33dacd7d73c274c94efbada145d676021dcad5be;hpb=b4775e5e760111e2d71fba3c44882dce390edfb2;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnBinds.lhs b/ghc/compiler/rename/RnBinds.lhs index 33dacd7..e777859 100644 --- a/ghc/compiler/rename/RnBinds.lhs +++ b/ghc/compiler/rename/RnBinds.lhs @@ -10,35 +10,32 @@ they may be affected by renaming (which isn't fully worked out yet). \begin{code} module RnBinds ( - rnTopBinds, rnTopMonoBinds, - rnMethodBinds, renameSigs, renameSigsFVs, - rnBinds, - unknownSigErr + rnTopMonoBinds, rnMonoBinds, rnMonoBindsAndThen, + rnMethodBinds, renameSigs, checkSigs, unknownSigErr ) where #include "HsVersions.h" -import {-# SOURCE #-} RnSource ( rnHsSigType, rnHsType ) import HsSyn -import HsBinds ( eqHsSig, sigName, hsSigDoc ) +import HsBinds ( eqHsSig, hsSigDoc ) import RdrHsSyn import RnHsSyn -import RnMonad -import RnExpr ( rnMatch, rnGRHSs, rnPat, checkPrecMatch ) -import RnEnv ( bindLocatedLocalsRn, lookupBndrRn, - lookupGlobalOccRn, lookupSigOccRn, +import TcRnMonad +import RnTypes ( rnHsSigType, rnHsType, rnPat ) +import RnExpr ( rnMatch, rnGRHSs, checkPrecMatch ) +import RnEnv ( bindLocatedLocalsRn, lookupBndrRn, lookupInstDeclBndr, + lookupSigOccRn, bindPatSigTyVars, bindLocalFixities, warnUnusedLocalBinds, mapFvRn, extendTyVarEnvFVRn, ) import CmdLineOpts ( DynFlag(..) ) -import Digraph ( stronglyConnComp, SCC(..) ) +import Digraph ( SCC(..), stronglyConnComp ) import Name ( Name, nameOccName, nameSrcLoc ) import NameSet import RdrName ( RdrName, rdrNameOcc ) import BasicTypes ( RecFlag(..) ) -import List ( partition ) +import List ( unzip4 ) import Outputable -import PrelNames ( isUnboundName ) \end{code} -- ToDo: Put the annotations into the monad, so that they arrive in the proper @@ -67,9 +64,6 @@ The vertag tag is a unique @Int@; the tags only need to be unique within one @MonoBinds@, so that unique-Int plumbing is done explicitly (heavy monad machinery not needed). -\begin{code} -type VertexTag = Int -\end{code} %************************************************************************ %* * @@ -112,7 +106,7 @@ However, non-recursive expressions are currently not expected as \Haskell{} programs, and this code should not be executed. Monomorphic bindings contain information that is returned in a tuple -(a @FlatMonoBindsInfo@) containing: +(a @FlatMonoBinds@) containing: \begin{enumerate} \item @@ -150,105 +144,102 @@ it expects the global environment to contain bindings for the binders %* * %************************************************************************ -@rnTopBinds@ assumes that the environment already +@rnTopMonoBinds@ assumes that the environment already contains bindings for the binders of this particular binding. \begin{code} -rnTopBinds :: RdrNameHsBinds -> RnMS (RenamedHsBinds, FreeVars) - -rnTopBinds EmptyBinds = returnRn (EmptyBinds, emptyFVs) -rnTopBinds (MonoBind bind sigs _) = rnTopMonoBinds bind sigs - -- The parser doesn't produce other forms +rnTopMonoBinds :: RdrNameMonoBinds + -> [RdrNameSig] + -> RnM (RenamedHsBinds, FreeVars) +-- Assumes the binders of the binding are in scope already +-- Very like rnMonoBinds, bu checks for missing signatures too rnTopMonoBinds mbinds sigs - = mapRn lookupBndrRn binder_rdr_names `thenRn` \ binder_names -> - let - bndr_name_set = mkNameSet binder_names - in - renameSigsFVs (okBindSig bndr_name_set) sigs `thenRn` \ (siglist, sig_fvs) -> - - ifOptRn Opt_WarnMissingSigs ( + = bindPatSigTyVars (collectSigTysFromMonoBinds mbinds) $ + -- Hmm; by analogy with Ids, this doesn't look right + + renameSigs sigs `thenM` \ siglist -> + rn_mono_binds siglist mbinds `thenM` \ (binders, final_binds, bind_fvs) -> + checkSigs okBindSig binders siglist `thenM_` + + -- Warn about missing signatures, but not in interface mode + -- (This is important when renaming bindings from 'deriving' clauses.) + getModeRn `thenM` \ mode -> + doptM Opt_WarnMissingSigs `thenM` \ warn_missing_sigs -> + (if warn_missing_sigs && not (isInterfaceMode mode) then let type_sig_vars = [n | Sig n _ _ <- siglist] - un_sigd_binders = nameSetToList (delListFromNameSet bndr_name_set type_sig_vars) + un_sigd_binders = filter (not . (`elem` type_sig_vars)) + (nameSetToList binders) in - mapRn_ missingSigWarn un_sigd_binders - ) `thenRn_` + mappM_ missingSigWarn un_sigd_binders + else + returnM () + ) `thenM_` - rn_mono_binds siglist mbinds `thenRn` \ (final_binds, bind_fvs) -> - returnRn (final_binds, bind_fvs `plusFV` sig_fvs) - where - binder_rdr_names = collectMonoBinders mbinds + returnM (final_binds, bind_fvs `plusFV` hsSigsFVs siglist) \end{code} + %************************************************************************ %* * %* Nested binds %* * %************************************************************************ -\subsubsection{Nested binds} - -@rnMonoBinds@ -\begin{itemize} -\item collects up the binders for this declaration group, -\item checks that they form a set -\item extends the environment to bind them to new local names -\item calls @rnMonoBinds@ to do the real work -\end{itemize} -% \begin{code} -rnBinds :: RdrNameHsBinds - -> (RenamedHsBinds -> RnMS (result, FreeVars)) - -> RnMS (result, FreeVars) - -rnBinds EmptyBinds thing_inside = thing_inside EmptyBinds -rnBinds (MonoBind bind sigs _) thing_inside = rnMonoBinds bind sigs thing_inside - -- the parser doesn't produce other forms - - -rnMonoBinds :: RdrNameMonoBinds - -> [RdrNameSig] - -> (RenamedHsBinds -> RnMS (result, FreeVars)) - -> RnMS (result, FreeVars) - -rnMonoBinds mbinds sigs thing_inside -- Non-empty monobinds - = -- Extract all the binders in this group, - -- and extend current scope, inventing new names for the new binders +rnMonoBindsAndThen :: RdrNameMonoBinds + -> [RdrNameSig] + -> (RenamedHsBinds -> RnM (result, FreeVars)) + -> RnM (result, FreeVars) + +rnMonoBindsAndThen mbinds sigs thing_inside -- Non-empty monobinds + = -- Extract all the binders in this group, and extend the + -- current scope, inventing new names for the new binders -- This also checks that the names form a set - bindLocatedLocalsRn (text "a binding group") - mbinders_w_srclocs $ \ new_mbinders -> - let - binder_set = mkNameSet new_mbinders - in - -- Rename the signatures - renameSigsFVs (okBindSig binder_set) sigs `thenRn` \ (siglist, sig_fvs) -> + bindLocatedLocalsRn doc mbinders_w_srclocs $ \ new_mbinders -> + bindPatSigTyVars (collectSigTysFromMonoBinds mbinds) $ - -- Report the fixity declarations in this group that - -- don't refer to any of the group's binders. - -- Then install the fixity declarations that do apply here + -- Then install local fixity declarations -- Notice that they scope over thing_inside too - let - fixity_sigs = [(name,sig) | FixSig sig@(FixitySig name _ _) <- siglist ] - in - extendFixityEnv fixity_sigs $ + bindLocalFixities [sig | FixSig sig <- sigs ] $ - rn_mono_binds siglist mbinds `thenRn` \ (binds, bind_fvs) -> + -- Do the business + rnMonoBinds mbinds sigs `thenM` \ (binds, bind_fvs) -> - -- Now do the "thing inside", and deal with the free-variable calculations - thing_inside binds `thenRn` \ (result,result_fvs) -> + -- Now do the "thing inside" + thing_inside binds `thenM` \ (result,result_fvs) -> + + -- Final error checking let - all_fvs = result_fvs `plusFV` bind_fvs `plusFV` sig_fvs - unused_binders = nameSetToList (binder_set `minusNameSet` all_fvs) + all_fvs = result_fvs `plusFV` bind_fvs + unused_binders = filter (not . (`elemNameSet` all_fvs)) new_mbinders in - warnUnusedLocalBinds unused_binders `thenRn_` - returnRn (result, delListFromNameSet all_fvs new_mbinders) + warnUnusedLocalBinds unused_binders `thenM_` + + returnM (result, delListFromNameSet all_fvs new_mbinders) where mbinders_w_srclocs = collectLocatedMonoBinders mbinds + doc = text "In the binding group for:" + <+> pprWithCommas ppr (map fst mbinders_w_srclocs) \end{code} +\begin{code} +rnMonoBinds :: RdrNameMonoBinds + -> [RdrNameSig] + -> RnM (RenamedHsBinds, FreeVars) + +-- Assumes the binders of the binding are in scope already + +rnMonoBinds mbinds sigs + = renameSigs sigs `thenM` \ siglist -> + rn_mono_binds siglist mbinds `thenM` \ (binders, final_binds, bind_fvs) -> + checkSigs okBindSig binders siglist `thenM_` + returnM (final_binds, bind_fvs `plusFV` hsSigsFVs siglist) +\end{code} + %************************************************************************ %* * \subsubsection{ MonoBinds -- the main work is done here} @@ -263,26 +254,28 @@ This is done {\em either} by pass 3 (for the top-level bindings), \begin{code} rn_mono_binds :: [RenamedSig] -- Signatures attached to this group -> RdrNameMonoBinds - -> RnMS (RenamedHsBinds, -- Dependency analysed - FreeVars) -- Free variables + -> RnM (NameSet, -- Binders + RenamedHsBinds, -- Dependency analysed + FreeVars) -- Free variables rn_mono_binds siglist mbinds - = - -- Rename the bindings, returning a MonoBindsInfo + = -- Rename the bindings, returning a MonoBindsInfo -- which is a list of indivisible vertices so far as -- the strongly-connected-components (SCC) analysis is concerned - flattenMonoBinds siglist mbinds `thenRn` \ mbinds_info -> + flattenMonoBinds siglist mbinds `thenM` \ mbinds_info -> -- Do the SCC analysis let - edges = mkEdges (mbinds_info `zip` [(0::Int)..]) - scc_result = stronglyConnComp edges - final_binds = foldr (ThenBinds . reconstructCycle) EmptyBinds scc_result - - -- Deal with bound and free-var calculation - rhs_fvs = plusFVs [fvs | (_,fvs,_,_) <- mbinds_info] + scc_result = rnSCC mbinds_info + (binds_s, rhs_fvs_s) = unzip (map reconstructCycle scc_result) + final_binds = foldr ThenBinds EmptyBinds binds_s + + -- Deal with bound and free-var calculation + -- Caller removes binders from free-var set + rhs_fvs = plusFVs rhs_fvs_s + bndrs = plusFVs [defs | (defs,_,_,_) <- mbinds_info] in - returnRn (final_binds, rhs_fvs) + returnM (bndrs, final_binds, rhs_fvs) \end{code} @flattenMonoBinds@ is ever-so-slightly magical in that it sticks @@ -294,56 +287,52 @@ in case any of them \fbox{\ ???\ } \begin{code} flattenMonoBinds :: [RenamedSig] -- Signatures -> RdrNameMonoBinds - -> RnMS [FlatMonoBindsInfo] + -> RnM [FlatMonoBinds] -flattenMonoBinds sigs EmptyMonoBinds = returnRn [] +flattenMonoBinds sigs EmptyMonoBinds = returnM [] flattenMonoBinds sigs (AndMonoBinds bs1 bs2) - = flattenMonoBinds sigs bs1 `thenRn` \ flat1 -> - flattenMonoBinds sigs bs2 `thenRn` \ flat2 -> - returnRn (flat1 ++ flat2) + = flattenMonoBinds sigs bs1 `thenM` \ flat1 -> + flattenMonoBinds sigs bs2 `thenM` \ flat2 -> + returnM (flat1 ++ flat2) flattenMonoBinds sigs (PatMonoBind pat grhss locn) - = pushSrcLocRn locn $ - rnPat pat `thenRn` \ (pat', pat_fvs) -> + = addSrcLoc locn $ + rnPat pat `thenM` \ (pat', pat_fvs) -> -- Find which things are bound in this group let names_bound_here = mkNameSet (collectPatBinders pat') in - sigsForMe names_bound_here sigs `thenRn` \ sigs_for_me -> - rnGRHSs grhss `thenRn` \ (grhss', fvs) -> - returnRn - [(names_bound_here, - fvs `plusFV` pat_fvs, - PatMonoBind pat' grhss' locn, - sigs_for_me - )] + sigsForMe names_bound_here sigs `thenM` \ sigs_for_me -> + rnGRHSs PatBindRhs grhss `thenM` \ (grhss', fvs) -> + returnM + [(names_bound_here, fvs `plusFV` pat_fvs, + PatMonoBind pat' grhss' locn, sigs_for_me + )] flattenMonoBinds sigs (FunMonoBind name inf matches locn) - = pushSrcLocRn locn $ - lookupBndrRn name `thenRn` \ new_name -> + = addSrcLoc locn $ + lookupBndrRn name `thenM` \ new_name -> let names_bound_here = unitNameSet new_name in - sigsForMe names_bound_here sigs `thenRn` \ sigs_for_me -> - mapFvRn rnMatch matches `thenRn` \ (new_matches, fvs) -> - mapRn_ (checkPrecMatch inf new_name) new_matches `thenRn_` - returnRn - [(unitNameSet new_name, - fvs, - FunMonoBind new_name inf new_matches locn, - sigs_for_me - )] + sigsForMe names_bound_here sigs `thenM` \ sigs_for_me -> + mapFvRn (rnMatch (FunRhs new_name)) matches `thenM` \ (new_matches, fvs) -> + mappM_ (checkPrecMatch inf new_name) new_matches `thenM_` + returnM + [(unitNameSet new_name, fvs, + FunMonoBind new_name inf new_matches locn, sigs_for_me + )] sigsForMe names_bound_here sigs - = foldlRn check [] (filter (sigForThisGroup names_bound_here) sigs) + = foldlM check [] (filter (sigForThisGroup names_bound_here) sigs) where check sigs sig = case filter (eqHsSig sig) sigs of - [] -> returnRn (sig:sigs) - other -> dupSigDeclErr sig `thenRn_` - returnRn sigs + [] -> returnM (sig:sigs) + other -> dupSigDeclErr sig `thenM_` + returnM sigs \end{code} @@ -363,99 +352,101 @@ in many ways the @op@ in an instance decl is just like an occurrence, not a binder. \begin{code} -rnMethodBinds :: [Name] -- Names for generic type variables +rnMethodBinds :: Name -- Class name + -> [Name] -- Names for generic type variables -> RdrNameMonoBinds - -> RnMS (RenamedMonoBinds, FreeVars) + -> RnM (RenamedMonoBinds, FreeVars) -rnMethodBinds gen_tyvars EmptyMonoBinds = returnRn (EmptyMonoBinds, emptyFVs) +rnMethodBinds cls gen_tyvars EmptyMonoBinds = returnM (EmptyMonoBinds, emptyFVs) -rnMethodBinds gen_tyvars (AndMonoBinds mb1 mb2) - = rnMethodBinds gen_tyvars mb1 `thenRn` \ (mb1', fvs1) -> - rnMethodBinds gen_tyvars mb2 `thenRn` \ (mb2', fvs2) -> - returnRn (mb1' `AndMonoBinds` mb2', fvs1 `plusFV` fvs2) +rnMethodBinds cls gen_tyvars (AndMonoBinds mb1 mb2) + = rnMethodBinds cls gen_tyvars mb1 `thenM` \ (mb1', fvs1) -> + rnMethodBinds cls gen_tyvars mb2 `thenM` \ (mb2', fvs2) -> + returnM (mb1' `AndMonoBinds` mb2', fvs1 `plusFV` fvs2) -rnMethodBinds gen_tyvars (FunMonoBind name inf matches locn) - = pushSrcLocRn locn $ +rnMethodBinds cls gen_tyvars (FunMonoBind name inf matches locn) + = addSrcLoc locn $ - lookupGlobalOccRn name `thenRn` \ sel_name -> + lookupInstDeclBndr cls name `thenM` \ sel_name -> -- We use the selector name as the binder - mapFvRn rn_match matches `thenRn` \ (new_matches, fvs) -> - mapRn_ (checkPrecMatch inf sel_name) new_matches `thenRn_` - returnRn (FunMonoBind sel_name inf new_matches locn, fvs `addOneFV` sel_name) + mapFvRn (rn_match sel_name) matches `thenM` \ (new_matches, fvs) -> + mappM_ (checkPrecMatch inf sel_name) new_matches `thenM_` + returnM (FunMonoBind sel_name inf new_matches locn, fvs `addOneFV` sel_name) where -- Gruesome; bring into scope the correct members of the generic type variables -- See comments in RnSource.rnSourceDecl(ClassDecl) - rn_match match@(Match _ (TypePatIn ty : _) _ _) - = extendTyVarEnvFVRn gen_tvs (rnMatch match) + rn_match sel_name match@(Match (TypePat ty : _) _ _) + = extendTyVarEnvFVRn gen_tvs $ + rnMatch (FunRhs sel_name) match where tvs = map rdrNameOcc (extractHsTyRdrNames ty) gen_tvs = [tv | tv <- gen_tyvars, nameOccName tv `elem` tvs] - rn_match match = rnMatch match + rn_match sel_name match = rnMatch (FunRhs sel_name) match -- Can't handle method pattern-bindings which bind multiple methods. -rnMethodBinds gen_tyvars mbind@(PatMonoBind other_pat _ locn) - = pushSrcLocRn locn $ - failWithRn (EmptyMonoBinds, emptyFVs) (methodBindErr mbind) +rnMethodBinds cls gen_tyvars mbind@(PatMonoBind other_pat _ locn) + = addSrcLoc locn (addErr (methodBindErr mbind)) `thenM_` + returnM (EmptyMonoBinds, emptyFVs) \end{code} %************************************************************************ %* * -\subsection[reconstruct-deps]{Reconstructing dependencies} -%* * -%************************************************************************ - -This @MonoBinds@- and @ClassDecls@-specific code is segregated here, -as the two cases are similar. - -\begin{code} -reconstructCycle :: SCC FlatMonoBindsInfo - -> RenamedHsBinds + Strongly connected components -reconstructCycle (AcyclicSCC (_, _, binds, sigs)) - = MonoBind binds sigs NonRecursive - -reconstructCycle (CyclicSCC cycle) - = MonoBind this_gp_binds this_gp_sigs Recursive - where - this_gp_binds = foldr1 AndMonoBinds [binds | (_, _, binds, _) <- cycle] - this_gp_sigs = foldr1 (++) [sigs | (_, _, _, sigs) <- cycle] -\end{code} - -%************************************************************************ -%* * -\subsubsection{ Manipulating FlatMonoBindInfo} %* * %************************************************************************ -During analysis a @MonoBinds@ is flattened to a @FlatMonoBindsInfo@. +During analysis a @MonoBinds@ is flattened to a @FlatMonoBinds@. The @RenamedMonoBinds@ is always an empty bind, a pattern binding or a function binding, and has itself been dependency-analysed and renamed. \begin{code} -type FlatMonoBindsInfo - = (NameSet, -- Set of names defined in this vertex - NameSet, -- Set of names used in this vertex - RenamedMonoBinds, - [RenamedSig]) -- Signatures, if any, for this vertex -mkEdges :: [(FlatMonoBindsInfo, VertexTag)] -> [(FlatMonoBindsInfo, VertexTag, [VertexTag])] +type Defs = NameSet +type Uses = NameSet +type FlatMonoBinds = (Defs, Uses, RenamedMonoBinds, [RenamedSig]) + -- Signatures, if any, for this vertex -mkEdges flat_info - = [ (info, tag, dest_vertices (nameSetToList names_used)) - | (info@(names_defined, names_used, mbind, sigs), tag) <- flat_info +rnSCC :: [FlatMonoBinds] -> [SCC FlatMonoBinds] +rnSCC nodes = stronglyConnComp (mkEdges nodes) + +type VertexTag = Int + +mkEdges :: [FlatMonoBinds] -> [(FlatMonoBinds, VertexTag, [VertexTag])] + -- We keep the uses with the binding, + -- so we can track unused bindings better +mkEdges nodes + = [ (thing, tag, dest_vertices uses) + | (thing@(_, uses, _, _), tag) <- tagged_nodes ] where + tagged_nodes = nodes `zip` [0::VertexTag ..] + -- An edge (v,v') indicates that v depends on v' - dest_vertices src_mentions = [ target_vertex - | ((names_defined, _, _, _), target_vertex) <- flat_info, - mentioned_name <- src_mentions, - mentioned_name `elemNameSet` names_defined - ] + dest_vertices uses = [ target_vertex + | ((defs, _, _, _), target_vertex) <- tagged_nodes, + defs `intersectsNameSet` uses + ] + +reconstructCycle :: SCC FlatMonoBinds -> (RenamedHsBinds, Uses) +reconstructCycle (AcyclicSCC (defs, uses, binds, sigs)) + = (MonoBind binds sigs NonRecursive, uses) +reconstructCycle (CyclicSCC cycle) + = (MonoBind this_gp_binds this_gp_sigs Recursive, + unionManyNameSets uses_s `minusNameSet` unionManyNameSets defs_s) + -- The uses of the cycle are the things used in any RHS + -- minus the binders of the group. Knocking them out + -- right here improves the error reporting for usused + -- bindings; e.g. f x = f x -- Otherwise unused + where + (defs_s, uses_s, binds_s, sigs_s) = unzip4 cycle + this_gp_binds = foldr1 AndMonoBinds binds_s + this_gp_sigs = foldr1 (++) sigs_s \end{code} @@ -476,31 +467,17 @@ At the moment we don't gather free-var info from the types in signatures. We'd only need this if we wanted to report unused tyvars. \begin{code} -renameSigsFVs ok_sig sigs - = renameSigs ok_sig sigs `thenRn` \ sigs' -> - returnRn (sigs', hsSigsFVs sigs') - -renameSigs :: (RenamedSig -> Bool) -- OK-sig predicate - -> [RdrNameSig] - -> RnMS [RenamedSig] - -renameSigs ok_sig [] = returnRn [] - -renameSigs ok_sig sigs - = -- Rename the signatures - mapRn renameSig sigs `thenRn` \ sigs' -> - +checkSigs :: (NameSet -> RenamedSig -> Bool) -- OK-sig predicbate + -> NameSet -- Binders of this group + -> [RenamedSig] + -> RnM () +checkSigs ok_sig bndrs sigs -- Check for (a) duplicate signatures -- (b) signatures for things not in this group - let - in_scope = filter is_in_scope sigs' - is_in_scope sig = case sigName sig of - Just n -> not (isUnboundName n) - Nothing -> True - (goods, bads) = partition ok_sig in_scope - in - mapRn_ unknownSigErr bads `thenRn_` - returnRn goods + -- Well, I can't see the check for (b)... ToDo! + = mappM_ unknownSigErr bad_sigs + where + bad_sigs = filter (not . ok_sig bndrs) sigs -- We use lookupSigOccRn in the signatures, which is a little bit unsatisfactory -- because this won't work for: @@ -511,39 +488,33 @@ renameSigs ok_sig sigs -- is in scope. (I'm assuming that Baz.op isn't in scope unqualified.) -- Doesn't seem worth much trouble to sort this. -renameSig :: Sig RdrName -> RnMS (Sig Name) --- ClassOpSig is renamed elsewhere. +renameSigs :: [Sig RdrName] -> RnM [Sig Name] +renameSigs sigs = mappM renameSig (filter (not . isFixitySig) sigs) + -- Remove fixity sigs which have been dealt with already + +renameSig :: Sig RdrName -> RnM (Sig Name) +-- ClassOpSig, FixitSig is renamed elsewhere. renameSig (Sig v ty src_loc) - = pushSrcLocRn src_loc $ - lookupSigOccRn v `thenRn` \ new_v -> - rnHsSigType (quotes (ppr v)) ty `thenRn` \ new_ty -> - returnRn (Sig new_v new_ty src_loc) + = addSrcLoc src_loc $ + lookupSigOccRn v `thenM` \ new_v -> + rnHsSigType (quotes (ppr v)) ty `thenM` \ new_ty -> + returnM (Sig new_v new_ty src_loc) renameSig (SpecInstSig ty src_loc) - = pushSrcLocRn src_loc $ - rnHsType (text "A SPECIALISE instance pragma") ty `thenRn` \ new_ty -> - returnRn (SpecInstSig new_ty src_loc) + = addSrcLoc src_loc $ + rnHsType (text "A SPECIALISE instance pragma") ty `thenM` \ new_ty -> + returnM (SpecInstSig new_ty src_loc) renameSig (SpecSig v ty src_loc) - = pushSrcLocRn src_loc $ - lookupSigOccRn v `thenRn` \ new_v -> - rnHsSigType (quotes (ppr v)) ty `thenRn` \ new_ty -> - returnRn (SpecSig new_v new_ty src_loc) - -renameSig (FixSig (FixitySig v fix src_loc)) - = pushSrcLocRn src_loc $ - lookupSigOccRn v `thenRn` \ new_v -> - returnRn (FixSig (FixitySig new_v fix src_loc)) - -renameSig (InlineSig v p src_loc) - = pushSrcLocRn src_loc $ - lookupSigOccRn v `thenRn` \ new_v -> - returnRn (InlineSig new_v p src_loc) - -renameSig (NoInlineSig v p src_loc) - = pushSrcLocRn src_loc $ - lookupSigOccRn v `thenRn` \ new_v -> - returnRn (NoInlineSig new_v p src_loc) + = addSrcLoc src_loc $ + lookupSigOccRn v `thenM` \ new_v -> + rnHsSigType (quotes (ppr v)) ty `thenM` \ new_ty -> + returnM (SpecSig new_v new_ty src_loc) + +renameSig (InlineSig b v p src_loc) + = addSrcLoc src_loc $ + lookupSigOccRn v `thenM` \ new_v -> + returnM (InlineSig b new_v p src_loc) \end{code} @@ -555,22 +526,22 @@ renameSig (NoInlineSig v p src_loc) \begin{code} dupSigDeclErr sig - = pushSrcLocRn loc $ - addErrRn (sep [ptext SLIT("Duplicate") <+> ptext what_it_is <> colon, + = addSrcLoc loc $ + addErr (sep [ptext SLIT("Duplicate") <+> what_it_is <> colon, ppr sig]) where (what_it_is, loc) = hsSigDoc sig unknownSigErr sig - = pushSrcLocRn loc $ - addErrRn (sep [ptext SLIT("Misplaced") <+> ptext what_it_is <> colon, + = addSrcLoc loc $ + addErr (sep [ptext SLIT("Misplaced") <+> what_it_is <> colon, ppr sig]) where (what_it_is, loc) = hsSigDoc sig missingSigWarn var - = pushSrcLocRn (nameSrcLoc var) $ - addWarnRn (sep [ptext SLIT("Definition but no type signature for"), quotes (ppr var)]) + = addSrcLoc (nameSrcLoc var) $ + addWarn (sep [ptext SLIT("Definition but no type signature for"), quotes (ppr var)]) methodBindErr mbind = hang (ptext SLIT("Can't handle multiple methods defined by one pattern binding"))