{-# LANGUAGE TransformListComp #-} {-# LANGUAGE RecordWildCards #-} {-# LANGUAGE Rank2Types #-} ----------------------------------------------------------------------------- -- | -- Module : Haddock.Backends.Html.Decl -- Copyright : (c) Simon Marlow 2003-2006, -- David Waern 2006-2009, -- Mark Lentczner 2010 -- License : BSD-like -- -- Maintainer : haddock@projects.haskell.org -- Stability : experimental -- Portability : portable ----------------------------------------------------------------------------- module Haddock.Backends.Xhtml.Decl ( ppDecl, ppTyName, ppTyFamHeader, ppTypeApp, ppOrphanInstances, tyvarNames ) where import Haddock.Backends.Xhtml.DocMarkup import Haddock.Backends.Xhtml.Layout import Haddock.Backends.Xhtml.Names import Haddock.Backends.Xhtml.Types import Haddock.Backends.Xhtml.Utils import Haddock.GhcUtils import Haddock.Types import Haddock.Doc (combineDocumentation) import Data.List ( intersperse, sort ) import qualified Data.Map as Map import Data.Maybe import Text.XHtml hiding ( name, title, p, quote ) import GHC hiding (LexicalFixity(..)) import GHC.Exts import Name import BooleanFormula import RdrName ( rdrNameOcc ) ppDecl :: Bool -> LinksInfo -> LHsDecl DocNameI -> [(HsDecl DocNameI, DocForDecl DocName)] -> DocForDecl DocName -> [DocInstance DocNameI] -> [(DocName, Fixity)] -> [(DocName, DocForDecl DocName)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppDecl summ links (L loc decl) pats (mbDoc, fnArgsDoc) instances fixities subdocs splice unicode pkg qual = case decl of TyClD (FamDecl d) -> ppTyFam summ False links instances fixities loc mbDoc d splice unicode pkg qual TyClD d@(DataDecl {}) -> ppDataDecl summ links instances fixities subdocs loc mbDoc d pats splice unicode pkg qual TyClD d@(SynDecl {}) -> ppTySyn summ links fixities loc (mbDoc, fnArgsDoc) d splice unicode pkg qual TyClD d@(ClassDecl {}) -> ppClassDecl summ links instances fixities loc mbDoc subdocs d splice unicode pkg qual SigD (TypeSig lnames lty) -> ppLFunSig summ links loc (mbDoc, fnArgsDoc) lnames (hsSigWcType lty) fixities splice unicode pkg qual SigD (PatSynSig lnames ty) -> ppLPatSig summ links loc (mbDoc, fnArgsDoc) lnames ty fixities splice unicode pkg qual ForD d -> ppFor summ links loc (mbDoc, fnArgsDoc) d fixities splice unicode pkg qual InstD _ -> noHtml DerivD _ -> noHtml _ -> error "declaration not supported by ppDecl" ppLFunSig :: Bool -> LinksInfo -> SrcSpan -> DocForDecl DocName -> [Located DocName] -> LHsType DocNameI -> [(DocName, Fixity)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppLFunSig summary links loc doc lnames lty fixities splice unicode pkg qual = ppFunSig summary links loc doc (map unLoc lnames) lty fixities splice unicode pkg qual ppFunSig :: Bool -> LinksInfo -> SrcSpan -> DocForDecl DocName -> [DocName] -> LHsType DocNameI -> [(DocName, Fixity)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppFunSig summary links loc doc docnames typ fixities splice unicode pkg qual = ppSigLike summary links loc mempty doc docnames fixities (unLoc typ, pp_typ) splice unicode pkg qual HideEmptyContexts where pp_typ = ppLType unicode qual HideEmptyContexts typ ppLPatSig :: Bool -> LinksInfo -> SrcSpan -> DocForDecl DocName -> [Located DocName] -> LHsSigType DocNameI -> [(DocName, Fixity)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppLPatSig summary links loc (doc, _argDocs) docnames typ fixities splice unicode pkg qual | summary = pref1 | otherwise = topDeclElem links loc splice (map unLoc docnames) (pref1 <+> ppFixities fixities qual) +++ docSection Nothing pkg qual doc where pref1 = hsep [ keyword "pattern" , hsep $ punctuate comma $ map (ppBinder summary . getOccName) docnames , dcolon unicode , ppPatSigType unicode qual (hsSigType typ) ] ppSigLike :: Bool -> LinksInfo -> SrcSpan -> Html -> DocForDecl DocName -> [DocName] -> [(DocName, Fixity)] -> (HsType DocNameI, Html) -> Splice -> Unicode -> Maybe Package -> Qualification -> HideEmptyContexts -> Html ppSigLike summary links loc leader doc docnames fixities (typ, pp_typ) splice unicode pkg qual emptyCtxts = ppTypeOrFunSig summary links loc docnames typ doc ( addFixities $ leader <+> ppTypeSig summary occnames pp_typ unicode , addFixities . concatHtml . punctuate comma $ map (ppBinder False) occnames , dcolon unicode ) splice unicode pkg qual emptyCtxts where occnames = map (nameOccName . getName) docnames addFixities html | summary = html | otherwise = html <+> ppFixities fixities qual ppTypeOrFunSig :: Bool -> LinksInfo -> SrcSpan -> [DocName] -> HsType DocNameI -> DocForDecl DocName -> (Html, Html, Html) -> Splice -> Unicode -> Maybe Package -> Qualification -> HideEmptyContexts -> Html ppTypeOrFunSig summary links loc docnames typ (doc, argDocs) (pref1, pref2, sep) splice unicode pkg qual emptyCtxts | summary = pref1 | Map.null argDocs = topDeclElem links loc splice docnames pref1 +++ docSection curName pkg qual doc | otherwise = topDeclElem links loc splice docnames pref2 +++ subArguments pkg qual (do_args 0 sep typ) +++ docSection curName pkg qual doc where curName = getName <$> listToMaybe docnames argDoc n = Map.lookup n argDocs do_largs n leader (L _ t) = do_args n leader t do_args :: Int -> Html -> HsType DocNameI -> [SubDecl] do_args n leader (HsForAllTy tvs ltype) = do_largs n leader' ltype where leader' = leader <+> ppForAll tvs unicode qual do_args n leader (HsQualTy lctxt ltype) | null (unLoc lctxt) = do_largs n leader ltype | otherwise = (leader <+> ppLContextNoArrow lctxt unicode qual emptyCtxts, Nothing, []) : do_largs n (darrow unicode) ltype do_args n leader (HsFunTy lt r) = (leader <+> ppLFunLhType unicode qual emptyCtxts lt, argDoc n, []) : do_largs (n+1) (arrow unicode) r do_args n leader t = [(leader <+> ppType unicode qual emptyCtxts t, argDoc n, [])] ppForAll :: [LHsTyVarBndr DocNameI] -> Unicode -> Qualification -> Html ppForAll tvs unicode qual = case [ppKTv n k | L _ (KindedTyVar (L _ n) k) <- tvs] of [] -> noHtml ts -> forallSymbol unicode <+> hsep ts +++ dot where ppKTv n k = parens $ ppTyName (getName n) <+> dcolon unicode <+> ppLKind unicode qual k ppFixities :: [(DocName, Fixity)] -> Qualification -> Html ppFixities [] _ = noHtml ppFixities fs qual = foldr1 (+++) (map ppFix uniq_fs) +++ rightEdge where ppFix (ns, p, d) = thespan ! [theclass "fixity"] << (toHtml d <+> toHtml (show p) <+> ppNames ns) ppDir InfixR = "infixr" ppDir InfixL = "infixl" ppDir InfixN = "infix" ppNames = case fs of _:[] -> const noHtml -- Don't display names for fixities on single names _ -> concatHtml . intersperse (stringToHtml ", ") . map (ppDocName qual Infix False) uniq_fs = [ (n, the p, the d') | (n, Fixity _ p d) <- fs , let d' = ppDir d , then group by Down (p,d') using groupWith ] rightEdge = thespan ! [theclass "rightedge"] << noHtml -- | Pretty-print type variables. ppTyVars :: Unicode -> Qualification -> [LHsTyVarBndr DocNameI] -> [Html] ppTyVars unicode qual tvs = map (ppHsTyVarBndr unicode qual . unLoc) tvs tyvarNames :: LHsQTyVars DocNameI -> [Name] tyvarNames = map (getName . hsLTyVarName) . hsQTvExplicit ppFor :: Bool -> LinksInfo -> SrcSpan -> DocForDecl DocName -> ForeignDecl DocNameI -> [(DocName, Fixity)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppFor summary links loc doc (ForeignImport (L _ name) typ _ _) fixities splice unicode pkg qual = ppFunSig summary links loc doc [name] (hsSigType typ) fixities splice unicode pkg qual ppFor _ _ _ _ _ _ _ _ _ _ = error "ppFor" -- we skip type patterns for now ppTySyn :: Bool -> LinksInfo -> [(DocName, Fixity)] -> SrcSpan -> DocForDecl DocName -> TyClDecl DocNameI -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppTySyn summary links fixities loc doc (SynDecl { tcdLName = L _ name, tcdTyVars = ltyvars , tcdRhs = ltype }) splice unicode pkg qual = ppTypeOrFunSig summary links loc [name] (unLoc ltype) doc (full <+> fixs, hdr <+> fixs, spaceHtml +++ equals) splice unicode pkg qual ShowEmptyToplevelContexts where hdr = hsep ([keyword "type", ppBinder summary occ] ++ ppTyVars unicode qual (hsQTvExplicit ltyvars)) full = hdr <+> equals <+> ppPatSigType unicode qual ltype occ = nameOccName . getName $ name fixs | summary = noHtml | otherwise = ppFixities fixities qual ppTySyn _ _ _ _ _ _ _ _ _ _ = error "declaration not supported by ppTySyn" ppTypeSig :: Bool -> [OccName] -> Html -> Unicode -> Html ppTypeSig summary nms pp_ty unicode = concatHtml htmlNames <+> dcolon unicode <+> pp_ty where htmlNames = intersperse (stringToHtml ", ") $ map (ppBinder summary) nms ppTyName :: Name -> Html ppTyName = ppName Prefix ppSimpleSig :: LinksInfo -> Splice -> Unicode -> Qualification -> HideEmptyContexts -> SrcSpan -> [DocName] -> HsType DocNameI -> Html ppSimpleSig links splice unicode qual emptyCtxts loc names typ = topDeclElem' names $ ppTypeSig True occNames ppTyp unicode where topDeclElem' = topDeclElem links loc splice ppTyp = ppType unicode qual emptyCtxts typ occNames = map getOccName names -------------------------------------------------------------------------------- -- * Type families -------------------------------------------------------------------------------- ppFamilyInfo :: Bool -> FamilyInfo DocNameI -> Html ppFamilyInfo assoc OpenTypeFamily | assoc = keyword "type" | otherwise = keyword "type family" ppFamilyInfo assoc DataFamily | assoc = keyword "data" | otherwise = keyword "data family" ppFamilyInfo _ (ClosedTypeFamily _) = keyword "type family" ppTyFamHeader :: Bool -> Bool -> FamilyDecl DocNameI -> Unicode -> Qualification -> Html ppTyFamHeader summary associated d@(FamilyDecl { fdInfo = info , fdResultSig = L _ result , fdInjectivityAnn = injectivity }) unicode qual = (case info of OpenTypeFamily | associated -> keyword "type" | otherwise -> keyword "type family" DataFamily | associated -> keyword "data" | otherwise -> keyword "data family" ClosedTypeFamily _ -> keyword "type family" ) <+> ppFamDeclBinderWithVars summary unicode qual d <+> ppResultSig result unicode qual <+> (case injectivity of Nothing -> noHtml Just (L _ injectivityAnn) -> ppInjectivityAnn unicode qual injectivityAnn ) <+> (case info of ClosedTypeFamily _ -> keyword "where ..." _ -> mempty ) ppResultSig :: FamilyResultSig DocNameI -> Unicode -> Qualification -> Html ppResultSig result unicode qual = case result of NoSig -> noHtml KindSig kind -> dcolon unicode <+> ppLKind unicode qual kind TyVarSig (L _ bndr) -> equals <+> ppHsTyVarBndr unicode qual bndr ppPseudoFamilyHeader :: Unicode -> Qualification -> PseudoFamilyDecl DocNameI -> Html ppPseudoFamilyHeader unicode qual (PseudoFamilyDecl { .. }) = ppFamilyInfo True pfdInfo <+> ppAppNameTypes (unLoc pfdLName) (map unLoc pfdTyVars) unicode qual <+> ppResultSig (unLoc pfdKindSig) unicode qual ppInjectivityAnn :: Bool -> Qualification -> InjectivityAnn DocNameI -> Html ppInjectivityAnn unicode qual (InjectivityAnn lhs rhs) = char '|' <+> ppLDocName qual Raw lhs <+> arrow unicode <+> hsep (map (ppLDocName qual Raw) rhs) ppTyFam :: Bool -> Bool -> LinksInfo -> [DocInstance DocNameI] -> [(DocName, Fixity)] -> SrcSpan -> Documentation DocName -> FamilyDecl DocNameI -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppTyFam summary associated links instances fixities loc doc decl splice unicode pkg qual | summary = ppTyFamHeader True associated decl unicode qual | otherwise = header_ +++ docSection Nothing pkg qual doc +++ instancesBit where docname = unLoc $ fdLName decl header_ = topDeclElem links loc splice [docname] $ ppTyFamHeader summary associated decl unicode qual <+> ppFixities fixities qual instancesBit | FamilyDecl { fdInfo = ClosedTypeFamily mb_eqns } <- decl , not summary = subEquations pkg qual $ map (ppTyFamEqn . unLoc) $ fromMaybe [] mb_eqns | otherwise = ppInstances links (OriginFamily docname) instances splice unicode pkg qual -- Individual equation of a closed type family ppTyFamEqn :: TyFamInstEqn DocNameI -> SubDecl ppTyFamEqn (HsIB { hsib_body = FamEqn { feqn_tycon = n, feqn_rhs = rhs , feqn_pats = ts } }) = ( ppAppNameTypes (unLoc n) (map unLoc ts) unicode qual <+> equals <+> ppType unicode qual HideEmptyContexts (unLoc rhs) , Nothing, [] ) ppPseudoFamilyDecl :: LinksInfo -> Splice -> Unicode -> Qualification -> PseudoFamilyDecl DocNameI -> Html ppPseudoFamilyDecl links splice unicode qual decl@(PseudoFamilyDecl { pfdLName = L loc name, .. }) = wrapper $ ppPseudoFamilyHeader unicode qual decl where wrapper = topDeclElem links loc splice [name] -------------------------------------------------------------------------------- -- * Associated Types -------------------------------------------------------------------------------- ppAssocType :: Bool -> LinksInfo -> DocForDecl DocName -> LFamilyDecl DocNameI -> [(DocName, Fixity)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppAssocType summ links doc (L loc decl) fixities splice unicode pkg qual = ppTyFam summ True links [] fixities loc (fst doc) decl splice unicode pkg qual -------------------------------------------------------------------------------- -- * TyClDecl helpers -------------------------------------------------------------------------------- -- | Print a type family and its variables ppFamDeclBinderWithVars :: Bool -> Unicode -> Qualification -> FamilyDecl DocNameI -> Html ppFamDeclBinderWithVars summ unicode qual (FamilyDecl { fdLName = lname, fdTyVars = tvs }) = ppAppDocNameTyVarBndrs summ unicode qual (unLoc lname) (hsq_explicit tvs) -- | Print a newtype / data binder and its variables ppDataBinderWithVars :: Bool -> Unicode -> Qualification -> TyClDecl DocNameI -> Html ppDataBinderWithVars summ unicode qual decl = ppAppDocNameTyVarBndrs summ unicode qual (tcdName decl) (hsQTvExplicit $ tcdTyVars decl) -------------------------------------------------------------------------------- -- * Type applications -------------------------------------------------------------------------------- ppAppDocNameTyVarBndrs :: Bool -> Unicode -> Qualification -> DocName -> [LHsTyVarBndr DocNameI] -> Html ppAppDocNameTyVarBndrs summ unicode qual n vs = ppTypeApp n vs ppDN (ppHsTyVarBndr unicode qual . unLoc) where ppDN notation = ppBinderFixity notation summ . nameOccName . getName ppBinderFixity Infix = ppBinderInfix ppBinderFixity _ = ppBinder -- | Print an application of a 'DocName' to its list of 'HsType's ppAppNameTypes :: DocName -> [HsType DocNameI] -> Unicode -> Qualification -> Html ppAppNameTypes n ts unicode qual = ppTypeApp n ts (\p -> ppDocName qual p True) (ppParendType unicode qual HideEmptyContexts) -- | General printing of type applications ppTypeApp :: DocName -> [a] -> (Notation -> DocName -> Html) -> (a -> Html) -> Html ppTypeApp n (t1:t2:rest) ppDN ppT | operator, not . null $ rest = parens opApp <+> hsep (map ppT rest) | operator = opApp where operator = isNameSym . getName $ n opApp = ppT t1 <+> ppDN Infix n <+> ppT t2 ppTypeApp n ts ppDN ppT = ppDN Prefix n <+> hsep (map ppT ts) ------------------------------------------------------------------------------- -- * Contexts ------------------------------------------------------------------------------- ppLContext, ppLContextNoArrow :: Located (HsContext DocNameI) -> Unicode -> Qualification -> HideEmptyContexts -> Html ppLContext = ppContext . unLoc ppLContextNoArrow = ppContextNoArrow . unLoc ppContextNoArrow :: HsContext DocNameI -> Unicode -> Qualification -> HideEmptyContexts -> Html ppContextNoArrow cxt unicode qual emptyCtxts = fromMaybe noHtml $ ppContextNoLocsMaybe (map unLoc cxt) unicode qual emptyCtxts ppContextNoLocs :: [HsType DocNameI] -> Unicode -> Qualification -> HideEmptyContexts -> Html ppContextNoLocs cxt unicode qual emptyCtxts = maybe noHtml (<+> darrow unicode) $ ppContextNoLocsMaybe cxt unicode qual emptyCtxts ppContextNoLocsMaybe :: [HsType DocNameI] -> Unicode -> Qualification -> HideEmptyContexts -> Maybe Html ppContextNoLocsMaybe [] _ _ emptyCtxts = case emptyCtxts of HideEmptyContexts -> Nothing ShowEmptyToplevelContexts -> Just (toHtml "()") ppContextNoLocsMaybe cxt unicode qual _ = Just $ ppHsContext cxt unicode qual ppContext :: HsContext DocNameI -> Unicode -> Qualification -> HideEmptyContexts -> Html ppContext cxt unicode qual emptyCtxts = ppContextNoLocs (map unLoc cxt) unicode qual emptyCtxts ppHsContext :: [HsType DocNameI] -> Unicode -> Qualification -> Html ppHsContext [] _ _ = noHtml ppHsContext [p] unicode qual = ppCtxType unicode qual p ppHsContext cxt unicode qual = parenList (map (ppType unicode qual HideEmptyContexts) cxt) ------------------------------------------------------------------------------- -- * Class declarations ------------------------------------------------------------------------------- ppClassHdr :: Bool -> Located [LHsType DocNameI] -> DocName -> LHsQTyVars DocNameI -> [Located ([Located DocName], [Located DocName])] -> Unicode -> Qualification -> Html ppClassHdr summ lctxt n tvs fds unicode qual = keyword "class" <+> (if not . null . unLoc $ lctxt then ppLContext lctxt unicode qual HideEmptyContexts else noHtml) <+> ppAppDocNameTyVarBndrs summ unicode qual n (hsQTvExplicit tvs) <+> ppFds fds unicode qual ppFds :: [Located ([Located DocName], [Located DocName])] -> Unicode -> Qualification -> Html ppFds fds unicode qual = if null fds then noHtml else char '|' <+> hsep (punctuate comma (map (fundep . unLoc) fds)) where fundep (vars1,vars2) = ppVars vars1 <+> arrow unicode <+> ppVars vars2 ppVars = hsep . map ((ppDocName qual Prefix True) . unLoc) ppShortClassDecl :: Bool -> LinksInfo -> TyClDecl DocNameI -> SrcSpan -> [(DocName, DocForDecl DocName)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppShortClassDecl summary links (ClassDecl { tcdCtxt = lctxt, tcdLName = lname, tcdTyVars = tvs , tcdFDs = fds, tcdSigs = sigs, tcdATs = ats }) loc subdocs splice unicode pkg qual = if not (any isUserLSig sigs) && null ats then (if summary then id else topDeclElem links loc splice [nm]) hdr else (if summary then id else topDeclElem links loc splice [nm]) (hdr <+> keyword "where") +++ shortSubDecls False ( [ ppAssocType summary links doc at [] splice unicode pkg qual | at <- ats , let doc = lookupAnySubdoc (unL $ fdLName $ unL at) subdocs ] ++ -- ToDo: add associated type defaults [ ppFunSig summary links loc doc names (hsSigType typ) [] splice unicode pkg qual | L _ (ClassOpSig False lnames typ) <- sigs , let doc = lookupAnySubdoc (head names) subdocs names = map unLoc lnames ] -- FIXME: is taking just the first name ok? Is it possible that -- there are different subdocs for different names in a single -- type signature? ) where hdr = ppClassHdr summary lctxt (unLoc lname) tvs fds unicode qual nm = unLoc lname ppShortClassDecl _ _ _ _ _ _ _ _ _ = error "declaration type not supported by ppShortClassDecl" ppClassDecl :: Bool -> LinksInfo -> [DocInstance DocNameI] -> [(DocName, Fixity)] -> SrcSpan -> Documentation DocName -> [(DocName, DocForDecl DocName)] -> TyClDecl DocNameI -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppClassDecl summary links instances fixities loc d subdocs decl@(ClassDecl { tcdCtxt = lctxt, tcdLName = lname, tcdTyVars = ltyvars , tcdFDs = lfds, tcdSigs = lsigs, tcdATs = ats }) splice unicode pkg qual | summary = ppShortClassDecl summary links decl loc subdocs splice unicode pkg qual | otherwise = classheader +++ docSection Nothing pkg qual d +++ minimalBit +++ atBit +++ methodBit +++ instancesBit where sigs = map unLoc lsigs classheader | any isUserLSig lsigs = topDeclElem links loc splice [nm] (hdr unicode qual <+> keyword "where" <+> fixs) | otherwise = topDeclElem links loc splice [nm] (hdr unicode qual <+> fixs) -- Only the fixity relevant to the class header fixs = ppFixities [ f | f@(n,_) <- fixities, n == unLoc lname ] qual nm = tcdName decl hdr = ppClassHdr summary lctxt (unLoc lname) ltyvars lfds -- ToDo: add assocatied typ defaults atBit = subAssociatedTypes [ ppAssocType summary links doc at subfixs splice unicode pkg qual | at <- ats , let n = unL . fdLName $ unL at doc = lookupAnySubdoc (unL $ fdLName $ unL at) subdocs subfixs = [ f | f@(n',_) <- fixities, n == n' ] ] methodBit = subMethods [ ppFunSig summary links loc doc [name] (hsSigType typ) subfixs splice unicode pkg qual | L _ (ClassOpSig _ lnames typ) <- lsigs , name <- map unLoc lnames , let doc = lookupAnySubdoc name subdocs subfixs = [ f | f@(n',_) <- fixities , name == n' ] ] -- N.B. taking just the first name is ok. Signatures with multiple names -- are expanded so that each name gets its own signature. minimalBit = case [ s | MinimalSig _ (L _ s) <- sigs ] of -- Miminal complete definition = every shown method And xs : _ | sort [getName n | L _ (Var (L _ n)) <- xs] == sort [getName n | ClassOpSig _ ns _ <- sigs, L _ n <- ns] -> noHtml -- Minimal complete definition = the only shown method Var (L _ n) : _ | [getName n] == [getName n' | L _ (ClassOpSig _ ns _) <- lsigs, L _ n' <- ns] -> noHtml -- Minimal complete definition = nothing And [] : _ -> subMinimal $ toHtml "Nothing" m : _ -> subMinimal $ ppMinimal False m _ -> noHtml ppMinimal _ (Var (L _ n)) = ppDocName qual Prefix True n ppMinimal _ (And fs) = foldr1 (\a b -> a+++", "+++b) $ map (ppMinimal True . unLoc) fs ppMinimal p (Or fs) = wrap $ foldr1 (\a b -> a+++" | "+++b) $ map (ppMinimal False . unLoc) fs where wrap | p = parens | otherwise = id ppMinimal p (Parens x) = ppMinimal p (unLoc x) instancesBit = ppInstances links (OriginClass nm) instances splice unicode pkg qual ppClassDecl _ _ _ _ _ _ _ _ _ _ _ _ = error "declaration type not supported by ppShortClassDecl" ppInstances :: LinksInfo -> InstOrigin DocName -> [DocInstance DocNameI] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppInstances links origin instances splice unicode pkg qual = subInstances pkg qual instName links True (zipWith instDecl [1..] instances) -- force Splice = True to use line URLs where instName = getOccString origin instDecl :: Int -> DocInstance DocNameI -> (SubDecl, Maybe Module, Located DocName) instDecl no (inst, mdoc, loc, mdl) = ((ppInstHead links splice unicode qual mdoc origin False no inst mdl), mdl, loc) ppOrphanInstances :: LinksInfo -> [DocInstance DocNameI] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppOrphanInstances links instances splice unicode pkg qual = subOrphanInstances pkg qual links True (zipWith instDecl [1..] instances) where instOrigin :: InstHead name -> InstOrigin (IdP name) instOrigin inst = OriginClass (ihdClsName inst) instDecl :: Int -> DocInstance DocNameI -> (SubDecl, Maybe Module, Located DocName) instDecl no (inst, mdoc, loc, mdl) = ((ppInstHead links splice unicode qual mdoc (instOrigin inst) True no inst Nothing), mdl, loc) ppInstHead :: LinksInfo -> Splice -> Unicode -> Qualification -> Maybe (MDoc DocName) -> InstOrigin DocName -> Bool -- ^ Is instance orphan -> Int -- ^ Normal -> InstHead DocNameI -> Maybe Module -> SubDecl ppInstHead links splice unicode qual mdoc origin orphan no ihd@(InstHead {..}) mdl = case ihdInstType of ClassInst { .. } -> ( subInstHead iid $ ppContextNoLocs clsiCtx unicode qual HideEmptyContexts <+> typ , mdoc , [subInstDetails iid ats sigs mname] ) where sigs = ppInstanceSigs links splice unicode qual clsiSigs ats = ppInstanceAssocTys links splice unicode qual clsiAssocTys TypeInst rhs -> ( subInstHead iid ptype , mdoc , [subFamInstDetails iid prhs mname] ) where ptype = keyword "type" <+> typ prhs = ptype <+> maybe noHtml (\t -> equals <+> ppType unicode qual HideEmptyContexts t) rhs DataInst dd -> ( subInstHead iid pdata , mdoc , [subFamInstDetails iid pdecl mname]) where pdata = keyword "data" <+> typ pdecl = pdata <+> ppShortDataDecl False True dd [] unicode qual where mname = maybe noHtml (\m -> toHtml "Defined in" <+> ppModule m) mdl iid = instanceId origin no orphan ihd typ = ppAppNameTypes ihdClsName ihdTypes unicode qual ppInstanceAssocTys :: LinksInfo -> Splice -> Unicode -> Qualification -> [PseudoFamilyDecl DocNameI] -> [Html] ppInstanceAssocTys links splice unicode qual = map ppFamilyDecl' where ppFamilyDecl' = ppPseudoFamilyDecl links splice unicode qual ppInstanceSigs :: LinksInfo -> Splice -> Unicode -> Qualification -> [Sig DocNameI] -> [Html] ppInstanceSigs links splice unicode qual sigs = do TypeSig lnames typ <- sigs let names = map unLoc lnames L _ rtyp = hsSigWcType typ -- Instance methods signatures are synified and thus don't have a useful -- SrcSpan value. Use the methods name location instead. return $ ppSimpleSig links splice unicode qual HideEmptyContexts (getLoc $ head $ lnames) names rtyp lookupAnySubdoc :: Eq id1 => id1 -> [(id1, DocForDecl id2)] -> DocForDecl id2 lookupAnySubdoc n = fromMaybe noDocForDecl . lookup n instanceId :: InstOrigin DocName -> Int -> Bool -> InstHead DocNameI -> String instanceId origin no orphan ihd = concat $ [ "o:" | orphan ] ++ [ qual origin , ":" ++ getOccString origin , ":" ++ (occNameString . getOccName . ihdClsName) ihd , ":" ++ show no ] where qual (OriginClass _) = "ic" qual (OriginData _) = "id" qual (OriginFamily _) = "if" ------------------------------------------------------------------------------- -- * Data & newtype declarations ------------------------------------------------------------------------------- -- TODO: print contexts ppShortDataDecl :: Bool -> Bool -> TyClDecl DocNameI -> [(HsDecl DocNameI, DocForDecl DocName)] -> Unicode -> Qualification -> Html ppShortDataDecl summary dataInst dataDecl pats unicode qual | [] <- cons , [] <- pats = dataHeader | [lcon] <- cons, [] <- pats, isH98, (cHead,cBody,cFoot) <- ppShortConstrParts summary dataInst (unLoc lcon) unicode qual = (dataHeader <+> equals <+> cHead) +++ cBody +++ cFoot | [] <- pats, isH98 = dataHeader +++ shortSubDecls dataInst (zipWith doConstr ('=':repeat '|') cons ++ pats1) | otherwise = (dataHeader <+> keyword "where") +++ shortSubDecls dataInst (map doGADTConstr cons ++ pats1) where dataHeader | dataInst = noHtml | otherwise = ppDataHeader summary dataDecl unicode qual doConstr c con = toHtml [c] <+> ppShortConstr summary (unLoc con) unicode qual doGADTConstr con = ppShortConstr summary (unLoc con) unicode qual cons = dd_cons (tcdDataDefn dataDecl) isH98 = case unLoc (head cons) of ConDeclH98 {} -> True ConDeclGADT{} -> False pats1 = [ hsep [ keyword "pattern" , hsep $ punctuate comma $ map (ppBinder summary . getOccName) lnames , dcolon unicode , ppPatSigType unicode qual (hsSigType typ) ] | (SigD (PatSynSig lnames typ),_) <- pats ] ppDataDecl :: Bool -> LinksInfo -> [DocInstance DocNameI] -> [(DocName, Fixity)] -> [(DocName, DocForDecl DocName)] -> SrcSpan -> Documentation DocName -> TyClDecl DocNameI -> [(HsDecl DocNameI, DocForDecl DocName)] -> Splice -> Unicode -> Maybe Package -> Qualification -> Html ppDataDecl summary links instances fixities subdocs loc doc dataDecl pats splice unicode pkg qual | summary = ppShortDataDecl summary False dataDecl pats unicode qual | otherwise = header_ +++ docSection Nothing pkg qual doc +++ constrBit +++ patternBit +++ instancesBit where docname = tcdName dataDecl cons = dd_cons (tcdDataDefn dataDecl) isH98 = case unLoc (head cons) of ConDeclH98 {} -> True ConDeclGADT{} -> False header_ = topDeclElem links loc splice [docname] $ ppDataHeader summary dataDecl unicode qual <+> whereBit <+> fix fix = ppFixities (filter (\(n,_) -> n == docname) fixities) qual whereBit | null cons , null pats = noHtml | null cons = keyword "where" | otherwise = if isH98 then noHtml else keyword "where" constrBit = subConstructors pkg qual [ ppSideBySideConstr subdocs subfixs unicode pkg qual c | c <- cons , let subfixs = filter (\(n,_) -> any (\cn -> cn == n) (map unLoc (getConNames (unLoc c)))) fixities ] patternBit = subPatterns pkg qual [ (hsep [ keyword "pattern" , hsep $ punctuate comma $ map (ppBinder summary . getOccName) lnames , dcolon unicode , ppPatSigType unicode qual (hsSigType typ) ] <+> ppFixities subfixs qual ,combineDocumentation (fst d), []) | (SigD (PatSynSig lnames typ),d) <- pats , let subfixs = filter (\(n,_) -> any (\cn -> cn == n) (map unLoc lnames)) fixities ] instancesBit = ppInstances links (OriginData docname) instances splice unicode pkg qual ppShortConstr :: Bool -> ConDecl DocNameI -> Unicode -> Qualification -> Html ppShortConstr summary con unicode qual = cHead <+> cBody <+> cFoot where (cHead,cBody,cFoot) = ppShortConstrParts summary False con unicode qual -- returns three pieces: header, body, footer so that header & footer can be -- incorporated into the declaration ppShortConstrParts :: Bool -> Bool -> ConDecl DocNameI -> Unicode -> Qualification -> (Html, Html, Html) ppShortConstrParts summary dataInst con unicode qual = case con of ConDeclH98{} -> case con_details con of PrefixCon args -> (header_ unicode qual +++ hsep (ppOcc : map (ppLParendType unicode qual HideEmptyContexts) args), noHtml, noHtml) RecCon (L _ fields) -> (header_ unicode qual +++ ppOcc <+> char '{', doRecordFields fields, char '}') InfixCon arg1 arg2 -> (header_ unicode qual +++ hsep [ppLParendType unicode qual HideEmptyContexts arg1, ppOccInfix, ppLParendType unicode qual HideEmptyContexts arg2], noHtml, noHtml) ConDeclGADT {} -> (ppOcc <+> dcolon unicode <+> ppLType unicode qual HideEmptyContexts resTy,noHtml,noHtml) where resTy = hsib_body (con_type con) doRecordFields fields = shortSubDecls dataInst (map (ppShortField summary unicode qual) (map unLoc fields)) header_ = ppConstrHdr forall_ tyVars context occ = map (nameOccName . getName . unLoc) $ getConNames con ppOcc = case occ of [one] -> ppBinder summary one _ -> hsep (punctuate comma (map (ppBinder summary) occ)) ppOccInfix = case occ of [one] -> ppBinderInfix summary one _ -> hsep (punctuate comma (map (ppBinderInfix summary) occ)) ltvs = fromMaybe (HsQTvs PlaceHolder [] PlaceHolder) (con_qvars con) tyVars = tyvarNames ltvs lcontext = fromMaybe (noLoc []) (con_cxt con) context = unLoc lcontext forall_ = False -- ppConstrHdr is for (non-GADT) existentials constructors' syntax ppConstrHdr :: Bool -> [Name] -> HsContext DocNameI -> Unicode -> Qualification -> Html ppConstrHdr forall_ tvs ctxt unicode qual = (if null tvs then noHtml else ppForall) +++ (if null ctxt then noHtml else ppContextNoArrow ctxt unicode qual HideEmptyContexts <+> darrow unicode +++ toHtml " ") where ppForall | forall_ = forallSymbol unicode <+> hsep (map (ppName Prefix) tvs) <+> toHtml ". " | otherwise = noHtml ppSideBySideConstr :: [(DocName, DocForDecl DocName)] -> [(DocName, Fixity)] -> Unicode -> Maybe Package -> Qualification -> LConDecl DocNameI -> SubDecl ppSideBySideConstr subdocs fixities unicode pkg qual (L _ con) = (decl, mbDoc, fieldPart) where decl = case con of ConDeclH98{} -> case con_details con of PrefixCon args -> hsep ((header_ +++ ppOcc) : map (ppLParendType unicode qual HideEmptyContexts) args) <+> fixity RecCon _ -> header_ +++ ppOcc <+> fixity InfixCon arg1 arg2 -> hsep [header_ +++ ppLParendType unicode qual HideEmptyContexts arg1, ppOccInfix, ppLParendType unicode qual HideEmptyContexts arg2] <+> fixity ConDeclGADT{} -> doGADTCon resTy resTy = hsib_body (con_type con) fieldPart = case getConDetails con of RecCon (L _ fields) -> [doRecordFields fields] _ -> [] doRecordFields fields = subFields pkg qual (map (ppSideBySideField subdocs unicode qual) (map unLoc fields)) doGADTCon :: Located (HsType DocNameI) -> Html doGADTCon ty = ppOcc <+> dcolon unicode -- ++AZ++ make this prepend "{..}" when it is a record style GADT <+> ppLType unicode qual HideEmptyContexts ty <+> fixity fixity = ppFixities fixities qual header_ = ppConstrHdr forall_ tyVars context unicode qual occ = map (nameOccName . getName . unLoc) $ getConNames con ppOcc = case occ of [one] -> ppBinder False one _ -> hsep (punctuate comma (map (ppBinder False) occ)) ppOccInfix = case occ of [one] -> ppBinderInfix False one _ -> hsep (punctuate comma (map (ppBinderInfix False) occ)) tyVars = tyvarNames (fromMaybe (HsQTvs PlaceHolder [] PlaceHolder) (con_qvars con)) context = unLoc (fromMaybe (noLoc []) (con_cxt con)) forall_ = False -- don't use "con_doc con", in case it's reconstructed from a .hi file, -- or also because we want Haddock to do the doc-parsing, not GHC. mbDoc = lookup (unLoc $ head $ getConNames con) subdocs >>= combineDocumentation . fst ppSideBySideField :: [(DocName, DocForDecl DocName)] -> Unicode -> Qualification -> ConDeclField DocNameI -> SubDecl ppSideBySideField subdocs unicode qual (ConDeclField names ltype _) = ( hsep (punctuate comma (map ((ppBinder False) . rdrNameOcc . unLoc . rdrNameFieldOcc . unLoc) names)) <+> dcolon unicode <+> ppLType unicode qual HideEmptyContexts ltype , mbDoc , [] ) where -- don't use cd_fld_doc for same reason we don't use con_doc above -- Where there is more than one name, they all have the same documentation mbDoc = lookup (selectorFieldOcc $ unLoc $ head names) subdocs >>= combineDocumentation . fst ppShortField :: Bool -> Unicode -> Qualification -> ConDeclField DocNameI -> Html ppShortField summary unicode qual (ConDeclField names ltype _) = hsep (punctuate comma (map ((ppBinder summary) . rdrNameOcc . unLoc . rdrNameFieldOcc . unLoc) names)) <+> dcolon unicode <+> ppLType unicode qual HideEmptyContexts ltype -- | Print the LHS of a data\/newtype declaration. -- Currently doesn't handle 'data instance' decls or kind signatures ppDataHeader :: Bool -> TyClDecl DocNameI -> Unicode -> Qualification -> Html ppDataHeader summary decl@(DataDecl { tcdDataDefn = HsDataDefn { dd_ND = nd , dd_ctxt = ctxt , dd_kindSig = ks } }) unicode qual = -- newtype or data (case nd of { NewType -> keyword "newtype"; DataType -> keyword "data" }) <+> -- context ppLContext ctxt unicode qual HideEmptyContexts <+> -- T a b c ..., or a :+: b ppDataBinderWithVars summary unicode qual decl <+> case ks of Nothing -> mempty Just (L _ x) -> dcolon unicode <+> ppKind unicode qual x ppDataHeader _ _ _ _ = error "ppDataHeader: illegal argument" -------------------------------------------------------------------------------- -- * Types and contexts -------------------------------------------------------------------------------- ppBang :: HsSrcBang -> Html ppBang (HsSrcBang _ _ SrcStrict) = toHtml "!" ppBang (HsSrcBang _ _ SrcLazy) = toHtml "~" ppBang _ = noHtml tupleParens :: HsTupleSort -> [Html] -> Html tupleParens HsUnboxedTuple = ubxParenList tupleParens _ = parenList sumParens :: [Html] -> Html sumParens = ubxSumList -------------------------------------------------------------------------------- -- * Rendering of HsType -------------------------------------------------------------------------------- pREC_TOP, pREC_CTX, pREC_FUN, pREC_OP, pREC_CON :: Int pREC_TOP = 0 :: Int -- type in ParseIface.y in GHC pREC_CTX = 1 :: Int -- Used for single contexts, eg. ctx => type -- (as opposed to (ctx1, ctx2) => type) pREC_FUN = 2 :: Int -- btype in ParseIface.y in GHC -- Used for LH arg of (->) pREC_OP = 3 :: Int -- Used for arg of any infix operator -- (we don't keep their fixities around) pREC_CON = 4 :: Int -- Used for arg of type applicn: -- always parenthesise unless atomic maybeParen :: Int -- Precedence of context -> Int -- Precedence of top-level operator -> Html -> Html -- Wrap in parens if (ctxt >= op) maybeParen ctxt_prec op_prec p | ctxt_prec >= op_prec = parens p | otherwise = p ppLType, ppLParendType, ppLFunLhType :: Unicode -> Qualification -> HideEmptyContexts -> Located (HsType DocNameI) -> Html ppLType unicode qual emptyCtxts y = ppType unicode qual emptyCtxts (unLoc y) ppLParendType unicode qual emptyCtxts y = ppParendType unicode qual emptyCtxts (unLoc y) ppLFunLhType unicode qual emptyCtxts y = ppFunLhType unicode qual emptyCtxts (unLoc y) ppCtxType :: Unicode -> Qualification -> HsType DocNameI -> Html ppCtxType unicode qual ty = ppr_mono_ty pREC_CTX ty unicode qual HideEmptyContexts ppType, ppParendType, ppFunLhType :: Unicode -> Qualification -> HideEmptyContexts -> HsType DocNameI -> Html ppType unicode qual emptyCtxts ty = ppr_mono_ty pREC_TOP ty unicode qual emptyCtxts ppParendType unicode qual emptyCtxts ty = ppr_mono_ty pREC_CON ty unicode qual emptyCtxts ppFunLhType unicode qual emptyCtxts ty = ppr_mono_ty pREC_FUN ty unicode qual emptyCtxts ppHsTyVarBndr :: Unicode -> Qualification -> HsTyVarBndr DocNameI -> Html ppHsTyVarBndr _ qual (UserTyVar (L _ name)) = ppDocName qual Raw False name ppHsTyVarBndr unicode qual (KindedTyVar name kind) = parens (ppDocName qual Raw False (unLoc name) <+> dcolon unicode <+> ppLKind unicode qual kind) ppLKind :: Unicode -> Qualification -> LHsKind DocNameI -> Html ppLKind unicode qual y = ppKind unicode qual (unLoc y) ppKind :: Unicode -> Qualification -> HsKind DocNameI -> Html ppKind unicode qual ki = ppr_mono_ty pREC_TOP ki unicode qual HideEmptyContexts ppPatSigType :: Unicode -> Qualification -> LHsType DocNameI -> Html ppPatSigType unicode qual typ = let emptyCtxts = if hasNonEmptyContext typ && isFirstContextEmpty typ then ShowEmptyToplevelContexts else HideEmptyContexts in ppLType unicode qual emptyCtxts typ where hasNonEmptyContext :: LHsType name -> Bool hasNonEmptyContext t = case unLoc t of HsForAllTy _ s -> hasNonEmptyContext s HsQualTy cxt s -> if null (unLoc cxt) then hasNonEmptyContext s else True HsFunTy _ s -> hasNonEmptyContext s _ -> False isFirstContextEmpty :: LHsType name -> Bool isFirstContextEmpty t = case unLoc t of HsForAllTy _ s -> isFirstContextEmpty s HsQualTy cxt _ -> null (unLoc cxt) HsFunTy _ s -> isFirstContextEmpty s _ -> False ppForAllPart :: Unicode -> Qualification -> [LHsTyVarBndr DocNameI] -> Html ppForAllPart unicode qual tvs = hsep (forallSymbol unicode : ppTyVars unicode qual tvs) +++ dot ppr_mono_lty :: Int -> LHsType DocNameI -> Unicode -> Qualification -> HideEmptyContexts -> Html ppr_mono_lty ctxt_prec ty = ppr_mono_ty ctxt_prec (unLoc ty) ppr_mono_ty :: Int -> HsType DocNameI -> Unicode -> Qualification -> HideEmptyContexts -> Html ppr_mono_ty ctxt_prec (HsForAllTy tvs ty) unicode qual emptyCtxts = maybeParen ctxt_prec pREC_FUN $ ppForAllPart unicode qual tvs <+> ppr_mono_lty pREC_TOP ty unicode qual emptyCtxts ppr_mono_ty ctxt_prec (HsQualTy ctxt ty) unicode qual emptyCtxts = maybeParen ctxt_prec pREC_FUN $ ppLContext ctxt unicode qual emptyCtxts <+> ppr_mono_lty pREC_TOP ty unicode qual emptyCtxts -- UnicodeSyntax alternatives ppr_mono_ty _ (HsTyVar _ (L _ name)) True _ _ | getOccString (getName name) == "*" = toHtml "★" | getOccString (getName name) == "(->)" = toHtml "(→)" ppr_mono_ty _ (HsBangTy b ty) u q _ = ppBang b +++ ppLParendType u q HideEmptyContexts ty ppr_mono_ty _ (HsTyVar _ (L _ name)) _ q _ = ppDocName q Prefix True name ppr_mono_ty ctxt_prec (HsFunTy ty1 ty2) u q e = ppr_fun_ty ctxt_prec ty1 ty2 u q e ppr_mono_ty _ (HsTupleTy con tys) u q _ = tupleParens con (map (ppLType u q HideEmptyContexts) tys) ppr_mono_ty _ (HsSumTy tys) u q _ = sumParens (map (ppLType u q HideEmptyContexts) tys) ppr_mono_ty _ (HsKindSig ty kind) u q e = parens (ppr_mono_lty pREC_TOP ty u q e <+> dcolon u <+> ppLKind u q kind) ppr_mono_ty _ (HsListTy ty) u q _ = brackets (ppr_mono_lty pREC_TOP ty u q HideEmptyContexts) ppr_mono_ty _ (HsPArrTy ty) u q _ = pabrackets (ppr_mono_lty pREC_TOP ty u q HideEmptyContexts) ppr_mono_ty ctxt_prec (HsIParamTy (L _ n) ty) u q _ = maybeParen ctxt_prec pREC_CTX $ ppIPName n <+> dcolon u <+> ppr_mono_lty pREC_TOP ty u q HideEmptyContexts ppr_mono_ty _ (HsSpliceTy {}) _ _ _ = error "ppr_mono_ty HsSpliceTy" ppr_mono_ty _ (HsRecTy {}) _ _ _ = toHtml "{..}" -- Can now legally occur in ConDeclGADT, the output here is to provide a -- placeholder in the signature, which is followed by the field -- declarations. ppr_mono_ty _ (HsCoreTy {}) _ _ _ = error "ppr_mono_ty HsCoreTy" ppr_mono_ty _ (HsExplicitListTy Promoted _ tys) u q _ = promoQuote $ brackets $ hsep $ punctuate comma $ map (ppLType u q HideEmptyContexts) tys ppr_mono_ty _ (HsExplicitListTy NotPromoted _ tys) u q _ = brackets $ hsep $ punctuate comma $ map (ppLType u q HideEmptyContexts) tys ppr_mono_ty _ (HsExplicitTupleTy _ tys) u q _ = promoQuote $ parenList $ map (ppLType u q HideEmptyContexts) tys ppr_mono_ty _ (HsAppsTy {}) _ _ _ = error "ppr_mono_ty HsAppsTy" ppr_mono_ty ctxt_prec (HsEqTy ty1 ty2) unicode qual _ = maybeParen ctxt_prec pREC_CTX $ ppr_mono_lty pREC_OP ty1 unicode qual HideEmptyContexts <+> char '~' <+> ppr_mono_lty pREC_OP ty2 unicode qual HideEmptyContexts ppr_mono_ty ctxt_prec (HsAppTy fun_ty arg_ty) unicode qual _ = maybeParen ctxt_prec pREC_CON $ hsep [ppr_mono_lty pREC_FUN fun_ty unicode qual HideEmptyContexts, ppr_mono_lty pREC_CON arg_ty unicode qual HideEmptyContexts] ppr_mono_ty ctxt_prec (HsOpTy ty1 op ty2) unicode qual _ = maybeParen ctxt_prec pREC_FUN $ ppr_mono_lty pREC_OP ty1 unicode qual HideEmptyContexts <+> ppr_op <+> ppr_mono_lty pREC_OP ty2 unicode qual HideEmptyContexts where -- `(:)` is valid in type signature only as constructor to promoted list -- and needs to be quoted in code so we explicitly quote it here too. ppr_op | (getOccString . getName . unLoc) op == ":" = promoQuote ppr_op' | otherwise = ppr_op' ppr_op' = ppLDocName qual Infix op ppr_mono_ty ctxt_prec (HsParTy ty) unicode qual emptyCtxts -- = parens (ppr_mono_lty pREC_TOP ty) = ppr_mono_lty ctxt_prec ty unicode qual emptyCtxts ppr_mono_ty ctxt_prec (HsDocTy ty _) unicode qual emptyCtxts = ppr_mono_lty ctxt_prec ty unicode qual emptyCtxts ppr_mono_ty _ (HsWildCardTy (AnonWildCard _)) _ _ _ = char '_' ppr_mono_ty _ (HsTyLit n) _ _ _ = ppr_tylit n ppr_tylit :: HsTyLit -> Html ppr_tylit (HsNumTy _ n) = toHtml (show n) ppr_tylit (HsStrTy _ s) = toHtml (show s) ppr_fun_ty :: Int -> LHsType DocNameI -> LHsType DocNameI -> Unicode -> Qualification -> HideEmptyContexts -> Html ppr_fun_ty ctxt_prec ty1 ty2 unicode qual emptyCtxts = let p1 = ppr_mono_lty pREC_FUN ty1 unicode qual HideEmptyContexts p2 = ppr_mono_lty pREC_TOP ty2 unicode qual emptyCtxts in maybeParen ctxt_prec pREC_FUN $ hsep [p1, arrow unicode <+> p2]