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-rw-r--r--haddock-api/src/Haddock/Backends/LaTeX.hs16
1 files changed, 9 insertions, 7 deletions
diff --git a/haddock-api/src/Haddock/Backends/LaTeX.hs b/haddock-api/src/Haddock/Backends/LaTeX.hs
index df1f94e6..e2e16947 100644
--- a/haddock-api/src/Haddock/Backends/LaTeX.hs
+++ b/haddock-api/src/Haddock/Backends/LaTeX.hs
@@ -25,7 +25,7 @@ import GHC.Utils.Ppr hiding (Doc, quote)
import qualified GHC.Utils.Ppr as Pretty
import GHC.Types.Basic ( PromotionFlag(..) )
-import GHC
+import GHC hiding (fromMaybeContext )
import GHC.Types.Name.Occurrence
import GHC.Types.Name ( nameOccName )
import GHC.Types.Name.Reader ( rdrNameOcc )
@@ -597,12 +597,12 @@ rDoc = maybeDoc . fmap latexStripTrailingWhitespace
-------------------------------------------------------------------------------
-ppClassHdr :: Bool -> Located [LHsType DocNameI] -> DocName
+ppClassHdr :: Bool -> Maybe (Located [LHsType DocNameI]) -> DocName
-> LHsQTyVars DocNameI -> [Located ([Located DocName], [Located DocName])]
-> Bool -> LaTeX
ppClassHdr summ lctxt n tvs fds unicode =
keyword "class"
- <+> (if not . null . unLoc $ lctxt then ppLContext lctxt unicode else empty)
+ <+> (if not (null $ fromMaybeContext lctxt) then ppLContext lctxt unicode else empty)
<+> ppAppDocNameNames summ n (tyvarNames tvs)
<+> ppFds fds unicode
@@ -806,7 +806,7 @@ ppSideBySideConstr subdocs unicode leader (L _ con) =
, con_ex_tvs = tyVars
, con_forall = L _ forall_
, con_mb_cxt = cxt
- } -> let context = unLoc (fromMaybe (noLoc []) cxt)
+ } -> let context = fromMaybeContext cxt
header_ = ppConstrHdr forall_ tyVars context unicode
in case det of
-- Prefix constructor, e.g. 'Just a'
@@ -980,9 +980,11 @@ ppTypeApp n ts ppDN ppT = ppDN n <+> hsep (map ppT ts)
-------------------------------------------------------------------------------
-ppLContext, ppLContextNoArrow :: Located (HsContext DocNameI) -> Bool -> LaTeX
-ppLContext = ppContext . unLoc
-ppLContextNoArrow = ppContextNoArrow . unLoc
+ppLContext, ppLContextNoArrow :: Maybe (LHsContext DocNameI) -> Bool -> LaTeX
+ppLContext Nothing _ = empty
+ppLContext (Just ctxt) unicode = ppContext (unLoc ctxt) unicode
+ppLContextNoArrow Nothing _ = empty
+ppLContextNoArrow (Just ctxt) unicode = ppContextNoArrow (unLoc ctxt) unicode
ppContextNoLocsMaybe :: [HsType DocNameI] -> Bool -> Maybe LaTeX
ppContextNoLocsMaybe [] _ = Nothing