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authorSimon Marlow <smarlow@fb.com>2016-07-22 02:55:04 -0700
committerSimon Marlow <marlowsd@gmail.com>2016-07-22 13:55:48 +0100
commita3309e797c42dae9bccdeb17ce52fcababbaff8a (patch)
tree4b0bc333667a3abe3502a6ac7f9912c0ded27a67
parentcdc81a1b73bd4d1b330a32870d4369e1a2af3610 (diff)
Disable NFData instances for GHC types when GHC >= 8.2
-rw-r--r--haddock-api/src/Haddock/Types.hs6
1 files changed, 4 insertions, 2 deletions
diff --git a/haddock-api/src/Haddock/Types.hs b/haddock-api/src/Haddock/Types.hs
index 1a7a0b6f..5220e6e9 100644
--- a/haddock-api/src/Haddock/Types.hs
+++ b/haddock-api/src/Haddock/Types.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE DeriveDataTypeable, DeriveFunctor, DeriveFoldable, DeriveTraversable, StandaloneDeriving, TypeFamilies, RecordWildCards #-}
+{-# LANGUAGE CPP, DeriveDataTypeable, DeriveFunctor, DeriveFoldable, DeriveTraversable, StandaloneDeriving, TypeFamilies, RecordWildCards #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE UndecidableInstances #-} -- Note [Pass sensitive types]
-- in module GHC.PlaceHolder
@@ -451,10 +451,12 @@ instance (NFData a, NFData mod)
DocExamples a -> a `deepseq` ()
DocHeader a -> a `deepseq` ()
-
+#if __GLASGOW_HASKELL__ < 801
+-- These were added to GHC itself in 8.2.1
instance NFData Name where rnf x = seq x ()
instance NFData OccName where rnf x = seq x ()
instance NFData ModuleName where rnf x = seq x ()
+#endif
instance NFData id => NFData (Header id) where
rnf (Header a b) = a `deepseq` b `deepseq` ()