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authorJohn MacFarlane <jgm@berkeley.edu>2015-11-09 11:15:11 -0800
committerJohn MacFarlane <jgm@berkeley.edu>2015-11-09 11:19:25 -0800
commitc1e474f005c99ca3d2210411389970f5da55c422 (patch)
tree726961ab0d78c9aae93ec79bfa34d8691725bedd /src/Text/Pandoc/Compat
parent23b693c029d17dc9833a81b33ca241f3b6fe6cc7 (diff)
downloadpandoc-c1e474f005c99ca3d2210411389970f5da55c422.tar.gz
Restored Text.Pandoc.Compat.Monoid.
Don't use custom prelude for latest ghc. This is a better approach to making 'stack ghci' and 'cabal repl' work. Instead of using NoImplicitPrelude, we only use the custom prelude for older ghc versions. The custom prelude presents a uniform API that matches the current base version's prelude. So, when developing (presumably with latest ghc), we don't use a custom prelude at all and hence have no trouble with ghci. The custom prelude no longer exports (<>): we now want to match the base 4.8 prelude behavior.
Diffstat (limited to 'src/Text/Pandoc/Compat')
-rw-r--r--src/Text/Pandoc/Compat/Monoid.hs17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/Text/Pandoc/Compat/Monoid.hs b/src/Text/Pandoc/Compat/Monoid.hs
new file mode 100644
index 000000000..4daceb8e1
--- /dev/null
+++ b/src/Text/Pandoc/Compat/Monoid.hs
@@ -0,0 +1,17 @@
+{-# LANGUAGE CPP #-}
+module Text.Pandoc.Compat.Monoid ( (<>) )
+ where
+
+#if MIN_VERSION_base(4,5,0)
+import Data.Monoid ((<>))
+
+#else
+import Data.Monoid
+
+infixr 6 <>
+
+--- | An infix synonym for 'mappend'.
+(<>) :: Monoid m => m -> m -> m
+(<>) = mappend
+{-# INLINE (<>) #-}
+#endif