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-rw-r--r--haddock-api/src/Haddock/Interface/Create.hs110
1 files changed, 68 insertions, 42 deletions
diff --git a/haddock-api/src/Haddock/Interface/Create.hs b/haddock-api/src/Haddock/Interface/Create.hs
index 76f1f765..272b8f02 100644
--- a/haddock-api/src/Haddock/Interface/Create.hs
+++ b/haddock-api/src/Haddock/Interface/Create.hs
@@ -38,6 +38,7 @@ import Data.Map (Map)
import Data.List
import Data.Maybe
import Data.Traversable
+import GHC.Stack
import GHC.Tc.Utils.Monad (finalSafeMode)
import GHC.Types.Avail hiding (avail)
@@ -65,7 +66,6 @@ import GHC.HsToCore.Docs hiding (mkMaps)
import GHC.Parser.Annotation (IsUnicodeSyntax(..))
import GHC.Unit.Module.Warnings
-
newtype IfEnv m = IfEnv
{
-- | Lookup names in the enviroment.
@@ -716,11 +716,24 @@ availExportItem is_sig modMap thisMod semMod warnings exportedNames
_ -> return []
- availExportDecl :: AvailInfo -> LHsDecl GhcRn
+ -- Tries 'extractDecl' first then falls back to 'hiDecl' if that fails
+ availDecl :: Name -> LHsDecl GhcRn -> IfM m (LHsDecl GhcRn)
+ availDecl declName parentDecl =
+ case extractDecl declMap declName parentDecl of
+ Right d -> pure d
+ Left err -> do
+ synifiedDeclOpt <- hiDecl dflags declName
+ case synifiedDeclOpt of
+ Just synifiedDecl -> pure synifiedDecl
+ Nothing -> pprPanic "availExportItem" (O.text err)
+
+ availExportDecl :: HasCallStack => AvailInfo -> LHsDecl GhcRn
-> (DocForDecl Name, [(Name, DocForDecl Name)])
-> IfM m [ ExportItem GhcRn ]
availExportDecl avail decl (doc, subs)
| availExportsDecl avail = do
+ extractedDecl <- availDecl (availName avail) decl
+
-- bundled pattern synonyms only make sense if the declaration is
-- exported (otherwise there would be nothing to bundle to)
bundledPatSyns <- findBundledPatterns avail
@@ -736,8 +749,7 @@ availExportItem is_sig modMap thisMod semMod warnings exportedNames
]
return [ ExportDecl {
- expItemDecl = restrictTo (fmap fst subs)
- (extractDecl declMap (availName avail) decl)
+ expItemDecl = restrictTo (fmap fst subs) extractedDecl
, expItemPats = bundledPatSyns
, expItemMbDoc = doc
, expItemSubDocs = subs
@@ -747,18 +759,18 @@ availExportItem is_sig modMap thisMod semMod warnings exportedNames
}
]
- | otherwise =
- return [ ExportDecl {
- expItemDecl = extractDecl declMap sub decl
+ | otherwise = for subs $ \(sub, sub_doc) -> do
+ extractedDecl <- availDecl sub decl
+
+ return ( ExportDecl {
+ expItemDecl = extractedDecl
, expItemPats = []
, expItemMbDoc = sub_doc
, expItemSubDocs = []
, expItemInstances = []
, expItemFixities = [ (sub, f) | Just f <- [M.lookup sub fixMap] ]
, expItemSpliced = False
- }
- | (sub, sub_doc) <- subs
- ]
+ } )
exportedNameSet = mkNameSet exportedNames
isExported n = elemNameSet n exportedNameSet
@@ -975,16 +987,26 @@ fullModuleContents is_sig modMap pkgName thisMod semMod warnings gre exportedNam
-- it might be an individual record selector or a class method. In these
-- cases we have to extract the required declaration (and somehow cobble
-- together a type signature for it...).
-extractDecl :: DeclMap -> Name -> LHsDecl GhcRn -> LHsDecl GhcRn
+--
+-- This function looks through the declarations in this module to try to find
+-- the one with the right name.
+extractDecl
+ :: HasCallStack
+ => DeclMap -- ^ all declarations in the file
+ -> Name -- ^ name of the declaration to extract
+ -> LHsDecl GhcRn -- ^ parent declaration
+ -> Either ErrMsg (LHsDecl GhcRn)
extractDecl declMap name decl
- | name `elem` getMainDeclBinder (unLoc decl) = decl
+ | name `elem` getMainDeclBinder (unLoc decl) = pure decl
| otherwise =
case unLoc decl of
- TyClD _ d@ClassDecl {} ->
+ TyClD _ d@ClassDecl { tcdLName = L _ clsNm
+ , tcdSigs = clsSigs
+ , tcdATs = clsATs } ->
let
matchesMethod =
[ lsig
- | lsig <- tcdSigs d
+ | lsig <- clsSigs
, ClassOpSig _ False _ _ <- pure $ unLoc lsig
-- Note: exclude `default` declarations (see #505)
, name `elem` sigName lsig
@@ -992,29 +1014,31 @@ extractDecl declMap name decl
matchesAssociatedType =
[ lfam_decl
- | lfam_decl <- tcdATs d
+ | lfam_decl <- clsATs
, name == unLoc (fdLName (unLoc lfam_decl))
]
-- TODO: document fixity
in case (matchesMethod, matchesAssociatedType) of
- ([s0], _) -> let (n, tyvar_names) = (tcdName d, tyClDeclTyVars d)
- L pos sig = addClassContext n tyvar_names s0
- in L pos (SigD noExtField sig)
- (_, [L pos fam_decl]) -> L pos (TyClD noExtField (FamDecl noExtField fam_decl))
+ ([s0], _) -> let tyvar_names = tyClDeclTyVars d
+ L pos sig = addClassContext clsNm tyvar_names s0
+ in pure (L pos (SigD noExtField sig))
+ (_, [L pos fam_decl]) -> pure (L pos (TyClD noExtField (FamDecl noExtField fam_decl)))
([], [])
| Just (famInstDecl:_) <- M.lookup name declMap
-> extractDecl declMap name famInstDecl
- _ -> pprPanic "extractDecl" (O.text "Ambiguous decl for" O.<+> O.ppr name O.<+> O.text "in class:"
- O.$$ O.nest 4 (O.ppr d)
- O.$$ O.text "Matches:"
- O.$$ O.nest 4 (O.ppr matchesMethod O.<+> O.ppr matchesAssociatedType))
- TyClD _ d@DataDecl {} ->
- let (n, tyvar_tys) = (tcdName d, lHsQTyVarsToTypes (tyClDeclTyVars d))
- in if isDataConName name
- then SigD noExtField <$> extractPatternSyn name n tyvar_tys (dd_cons (tcdDataDefn d))
- else SigD noExtField <$> extractRecSel name n tyvar_tys (dd_cons (tcdDataDefn d))
+ _ -> Left (concat [ "Ambiguous decl for ", getOccString name
+ , " in class ", getOccString clsNm ])
+
+ TyClD _ d@DataDecl { tcdLName = L _ dataNm
+ , tcdDataDefn = HsDataDefn { dd_cons = dataCons } } -> do
+ let ty_args = lHsQTyVarsToTypes (tyClDeclTyVars d)
+ lsig <- if isDataConName name
+ then extractPatternSyn name dataNm ty_args dataCons
+ else extractRecSel name dataNm ty_args dataCons
+ pure (SigD noExtField <$> lsig)
+
TyClD _ FamDecl {}
| isValName name
, Just (famInst:_) <- M.lookup name declMap
@@ -1024,8 +1048,8 @@ extractDecl declMap name decl
, feqn_pats = tys
, feqn_rhs = defn }))) ->
if isDataConName name
- then SigD noExtField <$> extractPatternSyn name n tys (dd_cons defn)
- else SigD noExtField <$> extractRecSel name n tys (dd_cons defn)
+ then fmap (SigD noExtField) <$> extractPatternSyn name n tys (dd_cons defn)
+ else fmap (SigD noExtField) <$> extractRecSel name n tys (dd_cons defn)
InstD _ (ClsInstD _ ClsInstDecl { cid_datafam_insts = insts })
| isDataConName name ->
let matches = [ d' | L _ d'@(DataFamInstDecl (FamEqn { feqn_rhs = dd })) <- insts
@@ -1033,9 +1057,9 @@ extractDecl declMap name decl
]
in case matches of
[d0] -> extractDecl declMap name (noLoc (InstD noExtField (DataFamInstD noExtField d0)))
- _ -> error "internal: extractDecl (ClsInstD)"
+ _ -> Left "internal: extractDecl (ClsInstD)"
| otherwise ->
- let matches = [ d' | L _ d'@(DataFamInstDecl d)
+ let matches = [ d' | L _ d'@(DataFamInstDecl d )
<- insts
-- , L _ ConDecl { con_details = RecCon rec } <- dd_cons (feqn_rhs d)
, Just rec <- map (getRecConArgs_maybe . unLoc) (dd_cons (feqn_rhs d))
@@ -1045,16 +1069,18 @@ extractDecl declMap name decl
]
in case matches of
[d0] -> extractDecl declMap name (noLoc . InstD noExtField $ DataFamInstD noExtField d0)
- _ -> error "internal: extractDecl (ClsInstD)"
- _ -> pprPanic "extractDecl" $
- O.text "Unhandled decl for" O.<+> O.ppr name O.<> O.text ":"
- O.$$ O.nest 4 (O.ppr decl)
+ _ -> Left "internal: extractDecl (ClsInstD)"
+ _ -> Left ("extractDecl: Unhandled decl for " ++ getOccString name)
-extractPatternSyn :: Name -> Name -> [LHsTypeArg GhcRn] -> [LConDecl GhcRn] -> LSig GhcRn
+extractPatternSyn :: HasCallStack
+ => Name -> Name
+ -> [LHsTypeArg GhcRn] -> [LConDecl GhcRn]
+ -> Either ErrMsg (LSig GhcRn)
extractPatternSyn nm t tvs cons =
case filter matches cons of
- [] -> error "extractPatternSyn: constructor pattern not found"
- con:_ -> extract <$> con
+ [] -> Left . O.showSDocOneLine O.defaultSDocContext $
+ O.text "constructor pattern " O.<+> O.ppr nm O.<+> O.text "not found in type" O.<+> O.ppr t
+ con:_ -> pure (extract <$> con)
where
matches :: LConDecl GhcRn -> Bool
matches (L _ con) = nm `elem` (unLoc <$> getConNames con)
@@ -1089,13 +1115,13 @@ extractPatternSyn nm t tvs cons =
mkAppTyArg f (HsArgPar _) = HsParTy noExtField f
extractRecSel :: Name -> Name -> [LHsTypeArg GhcRn] -> [LConDecl GhcRn]
- -> LSig GhcRn
-extractRecSel _ _ _ [] = error "extractRecSel: selector not found"
+ -> Either ErrMsg (LSig GhcRn)
+extractRecSel _ _ _ [] = Left "extractRecSel: selector not found"
extractRecSel nm t tvs (L _ con : rest) =
case getRecConArgs_maybe con of
Just (L _ fields) | ((l,L _ (ConDeclField _ _nn ty _)) : _) <- matching_fields fields ->
- L l (TypeSig noExtField [noLoc nm] (mkEmptySigWcType (noLoc (HsFunTy noExtField (HsUnrestrictedArrow NormalSyntax) data_ty (getBangType ty)))))
+ pure (L l (TypeSig noExtField [noLoc nm] (mkEmptyWildCardBndrs $ mkEmptySigType (noLoc (HsFunTy noExtField (HsUnrestrictedArrow NormalSyntax) data_ty (getBangType ty))))))
_ -> extractRecSel nm t tvs rest
where
matching_fields :: [LConDeclField GhcRn] -> [(SrcSpan, LConDeclField GhcRn)]
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 12:12:19 +0000