nixpkgs/pkgs/development/haskell-modules/haskell-src-meta-ghc710.patch

From 24e6f45408083745080ff2f3710f58209041113c Mon Sep 17 00:00:00 2001
From: Luite Stegeman <stegeman@gmail.com>
Date: Sun, 28 Dec 2014 21:33:22 +0100
Subject: [PATCH] updates for GHC 7.10 and Template Haskell 2.10

---
 haskell-src-meta.cabal                        | 4 ++--
 src/Language/Haskell/Meta/Syntax/Translate.hs | 6 ++++++
 src/Language/Haskell/Meta/Utils.hs            | 5 ++++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/Language/Haskell/Meta/Syntax/Translate.hs b/src/Language/Haskell/Meta/Syntax/Translate.hs
index 189d32e..36a08f1 100644
--- a/src/Language/Haskell/Meta/Syntax/Translate.hs
+++ b/src/Language/Haskell/Meta/Syntax/Translate.hs
@@ -384,9 +384,15 @@ a .->. b = AppT (AppT ArrowT a) b
 toCxt :: Hs.Context -> Cxt
 toCxt = fmap toPred
  where
+#if MIN_VERSION_template_haskell(2,10,0)
+  toPred (Hs.ClassA n ts) = foldl' AppT (ConT (toName n)) (fmap toType ts)
+  toPred (Hs.InfixA t1 n t2) = foldl' AppT (ConT (toName n)) (fmap toType [t1,t2])
+  toPred (Hs.EqualP t1 t2) = foldl' AppT EqualityT (fmap toType [t1,t2])
+#else
   toPred (Hs.ClassA n ts) = ClassP (toName n) (fmap toType ts)
   toPred (Hs.InfixA t1 n t2) = ClassP (toName n) (fmap toType [t1, t2])
   toPred (Hs.EqualP t1 t2) = EqualP (toType t1) (toType t2)
+#endif
   toPred a@Hs.IParam{} = noTH "toCxt" a
 
 foldAppT :: Type -> [Type] -> Type
diff --git a/src/Language/Haskell/Meta/Utils.hs b/src/Language/Haskell/Meta/Utils.hs
index 36f7e96..d194f3e 100644
--- a/src/Language/Haskell/Meta/Utils.hs
+++ b/src/Language/Haskell/Meta/Utils.hs
@@ -166,6 +166,9 @@ renameT env new (ForallT ns cxt t) =
     unVarT (VarT n) = PlainTV n
     renamePreds = renameThings renamePred
 
+#if MIN_VERSION_template_haskell(2,10,0)
+    renamePred = renameT
+#else
     renamePred env new (ClassP n ts) = let
         (ts', env', new') = renameTs env new [] ts
       in (ClassP (normaliseName n) ts', env', new')
@@ -174,7 +177,7 @@ renameT env new (ForallT ns cxt t) =
         (t1', env1, new1) = renameT env new t1
         (t2', env2, new2) = renameT env1 new1 t2
       in (EqualP t1' t2', env2, new2)
-
+#endif
 
 -- | Remove qualification, etc.
 normaliseName :: Name -> Name