From 0af265fa79e770137d6a3d9e72ef66a351de683b Mon Sep 17 00:00:00 2001
From: Alexandre Esteves <alexfmpe@proton.me>
Date: Thu, 11 Apr 2024 00:11:53 +0100
Subject: [PATCH] Build with ghc 9.8

---
 aeson-gadt-th.cabal       |  8 ++++----
 src/Data/Aeson/GADT/TH.hs | 12 ++++++++++--
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/aeson-gadt-th.cabal b/aeson-gadt-th.cabal
index bb53d58..5bd796c 100644
--- a/aeson-gadt-th.cabal
+++ b/aeson-gadt-th.cabal
@@ -20,13 +20,13 @@ flag build-readme
 
 library
   exposed-modules: Data.Aeson.GADT.TH
-  build-depends: base >= 4.8 && < 4.19
+  build-depends: base >= 4.8 && < 4.20
                , aeson >= 1.3 && < 2.3
                , containers >= 0.5 && < 0.7
                , dependent-sum >= 0.4 && < 0.8
                , transformers >= 0.5 && < 0.7
-               , template-haskell >= 2.11.0 && < 2.21
-               , th-abstraction >= 0.4 && < 0.5
+               , template-haskell >= 2.11.0 && < 2.22
+               , th-abstraction >= 0.4 && < 0.7
   if impl(ghc < 8.2)
     build-depends: dependent-sum < 0.6.2.2
   hs-source-dirs: src
@@ -39,7 +39,7 @@ executable readme
   build-depends: base
                , aeson
                , dependent-sum
-               , dependent-sum-template >= 0.1 && < 0.2
+               , dependent-sum-template >= 0.2 && < 0.3
                , dependent-map >= 0.3 && < 0.5
                , aeson-gadt-th
   default-language: Haskell2010
diff --git a/src/Data/Aeson/GADT/TH.hs b/src/Data/Aeson/GADT/TH.hs
index d3529a5..6f35b4e 100644
--- a/src/Data/Aeson/GADT/TH.hs
+++ b/src/Data/Aeson/GADT/TH.hs
@@ -45,7 +45,15 @@ import qualified Data.Set as Set
 import Data.Some (Some(..))
 import Language.Haskell.TH hiding (cxt)
 import Language.Haskell.TH.Datatype (ConstructorInfo(..), applySubstitution, datatypeCons, reifyDatatype, unifyTypes)
-import Language.Haskell.TH.Datatype.TyVarBndr (TyVarBndr_, tvName)
+import Language.Haskell.TH.Datatype.TyVarBndr (tvName)
+
+#if !MIN_VERSION_template_haskell(2,21,0)
+#if MIN_VERSION_th_abstraction(0,6,0)
+import Language.Haskell.TH.Datatype.TyVarBndr (TyVarBndrVis)
+#elseif
+type TyVarBndrVis = TyVarBndr_ BndrVis
+#endif
+#endif
 
 #if MIN_VERSION_dependent_sum(0,5,0)
 #else
@@ -273,7 +281,7 @@ kindArity = \case
 -- its declaration, and the arity of the kind of type being defined (i.e. how many more arguments would
 -- need to be supplied in addition to the bound parameters in order to obtain an ordinary type of kind *).
 -- If the supplied 'Name' is anything other than a data or newtype, produces an error.
-tyConArity' :: Name -> Q ([TyVarBndr_ ()], Int)
+tyConArity' :: Name -> Q ([TyVarBndrVis], Int)
 tyConArity' n = reify n >>= return . \case
   TyConI (DataD _ _ ts mk _ _) -> (ts, maybe 0 kindArity mk)
   TyConI (NewtypeD _ _ ts mk _ _) -> (ts, maybe 0 kindArity mk)