[fix] make syntactic tokens work with ghc 9.6

Author: MangoIV

ghcide/src/Development/IDE/GHC/Compat/Core.hs

@@ -633,7 +633,7 @@ instance HasSrcSpan (SrcLoc.GenLocated SrcSpan a) where
 #if MIN_VERSION_ghc(9,11,0)
 instance HasSrcSpan (GHC.EpToken sym) where
   getLoc = GHC.getHasLoc
-#else
+#elif MIN_VERSION_ghc(9,9,0)
 instance HasSrcSpan (GHC.EpToken sym) where
   getLoc = GHC.getHasLoc . \case
     GHC.NoEpTok -> Nothing
@@ -650,15 +650,25 @@ instance HasSrcSpan GHC.AddEpAnn where
   getLoc (GHC.AddEpAnn _ loc) = getLoc loc
 
 instance HasSrcSpan GHC.EpaLocation where
+#if  MIN_VERSION_ghc(9,9,0)
   getLoc loc = GHC.getHasLoc loc
+#else
+  getLoc loc = case loc of
+    GHC.EpaSpan span bufspan -> RealSrcSpan span $ case bufspan of Strict.Nothing -> Nothing; Strict.Just a -> Just a
+    GHC.EpaDelta {} -> panic "compiler inserted epadelta in EpaLocation"
+#endif
 #endif
 
-#if MIN_VERSION_ghc(9,9,0)
 instance HasSrcSpan GHC.LEpaComment where
+#if MIN_VERSION_ghc(9,9,0)
   getLoc :: GHC.LEpaComment -> SrcSpan
   getLoc (GHC.L l _) = case l of
     SrcLoc.EpaDelta {} -> panic "compiler inserted epadelta into NoCommentsLocation"
     SrcLoc.EpaSpan span -> span
+#else
+  getLoc :: GHC.LEpaComment -> SrcSpan
+  getLoc c = case c of
+    SrcLoc.L (GHC.Anchor realSpan _) _ -> RealSrcSpan realSpan Nothing
 #endif
 
 #if MIN_VERSION_ghc(9,9,0)

plugins/hls-semantic-tokens-plugin/src/Ide/Plugin/SemanticTokens/Internal.hs

@@ -178,7 +178,7 @@ extractTyToTy :: forall f a. (Typeable f, Data a) => a -> Maybe (forall r. (fora
 extractTyToTy node
   | App conRep argRep <- typeOf node
   , Just HRefl <- eqTypeRep conRep (typeRep @f)
-  = Just $ withTypeable argRep $ (\k -> k node)
+  = Just $ withTypeable argRep \k -> k node
   | otherwise = Nothing
 
 {-# inline extractTy #-}
@@ -191,13 +191,17 @@ extractTy node
 computeRangeHsSyntacticTokenTypeList :: ParsedModule -> RangeHsSyntacticTokenTypes
 computeRangeHsSyntacticTokenTypeList ParsedModule {pm_parsed_source} =
   let toks = astTraversalWith pm_parsed_source \node -> mconcat
-         [ maybeToList $ mkFromLocatable TKeyword . (\k -> k \x k' -> k' x) =<< extractTyToTy @EpToken node
-         -- FIXME: probably needs to be commented out for ghc > 9.10
-         -- , maybeToList $ mkFromLocatable TKeyword . (\x k -> k x) =<< extractTy node
-         -- , do
-         --   EpAnnImportDecl i p s q pkg a <- maybeToList $ extractTy @EpAnnImportDecl node
+         [
+#if MIN_VERSION_ghc(9,9,0)
+           maybeToList $ mkFromLocatable TKeyword . (\k -> k \x k' -> k' x) =<< extractTyToTy @EpToken node,
+#endif
+#if !MIN_VERSION_ghc(9,11,0)
+           maybeToList $ mkFromLocatable TKeyword . (\x k -> k x) =<< extractTy @AddEpAnn node
+         , do
+           EpAnnImportDecl i p s q pkg a <- maybeToList $ extractTy @EpAnnImportDecl node
 
-         --   mapMaybe (mkFromLocatable TKeyword . (\x k -> k x)) $ catMaybes $ [Just i, s, q, pkg, a] <> foldMap (\(l, l') -> [Just l, Just l']) p
+           mapMaybe (mkFromLocatable TKeyword . (\x k -> k x)) $ catMaybes $ [Just i, s, q, pkg, a] <> foldMap (\(l, l') -> [Just l, Just l']) p
+#endif
          , maybeToList $ mkFromLocatable TComment . (\x k -> k x) =<< extractTy @LEpaComment node
          , do
            L loc expr <- maybeToList $ extractTy @(LHsExpr GhcPs) node
@@ -217,13 +221,17 @@ computeRangeHsSyntacticTokenTypeList ParsedModule {pm_parsed_source} =
                  HsInteger {}         -> TNumberLit
                  HsIntPrim {}         -> TNumberLit
                  HsWordPrim {}        -> TNumberLit
+#if MIN_VERSION_ghc(9,9,0)
                  HsWord8Prim {}       -> TNumberLit
                  HsWord16Prim {}      -> TNumberLit
                  HsWord32Prim {}      -> TNumberLit
+#endif
                  HsWord64Prim {}      -> TNumberLit
+#if MIN_VERSION_ghc(9,9,0)
                  HsInt8Prim {}        -> TNumberLit
                  HsInt16Prim {}       -> TNumberLit
                  HsInt32Prim {}       -> TNumberLit
+#endif
                  HsInt64Prim {}       -> TNumberLit
                  HsFloatPrim {}       -> TNumberLit
                  HsDoublePrim {}      -> TNumberLit