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Compatibility with GHC 8.10 and template-haskell 2.16.
Taken from
https://raw.githubusercontent.com/archlinux/svntogit-community/packages/haskell-language-haskell-extract/trunk/ghc-8.10.patch
diff --git a/src/Language/Haskell/Extract.hs b/src/Language/Haskell/Extract.hs
index 3e8958b..43dfe04 100644
--- a/src/Language/Haskell/Extract.hs
+++ b/src/Language/Haskell/Extract.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
module Language.Haskell.Extract (
functionExtractor,
functionExtractorMap,
@@ -25,7 +26,11 @@ extractAllFunctions pattern =
functionExtractor :: String -> ExpQ
functionExtractor pattern =
do functions <- extractAllFunctions pattern
- let makePair n = TupE [ LitE $ StringL n , VarE $ mkName n]
+ let makePair n = TupE
+#if MIN_VERSION_template_haskell(2,16,0)
+ $ map Just
+#endif
+ [ LitE $ StringL n , VarE $ mkName n]
return $ ListE $ map makePair functions
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