Use custom Prelude to avoid compiler warnings.

- The (non-exported) prelude is in prelude/Prelude.hs.
- It exports Monoid and Applicative, like base 4.8 prelude,
  but works with older base versions.
- It exports (<>) for mappend.
- It hides 'catch' on older base versions.

This allows us to remove many imports of Data.Monoid
and Control.Applicative, and remove Text.Pandoc.Compat.Monoid.

It should allow us to use -Wall again for ghc 7.10.

1 files changed, 0 insertions, 4 deletions

diff --git a/src/Text/Pandoc/PDF.hs b/src/Text/Pandoc/PDF.hs
index 8f92a3321..f466fcb72 100644
--- a/src/Text/Pandoc/PDF.hs
+++ b/src/Text/Pandoc/PDF.hs
@@ -42,7 +42,6 @@ import Data.Digest.Pure.SHA (showDigest, sha1)
 import System.Environment
 import Control.Monad (unless, when, (<=<))
 import qualified Control.Exception as E
-import Control.Applicative ((<$))
 import Data.List (isInfixOf)
 import Data.Maybe (fromMaybe)
 import qualified Text.Pandoc.UTF8 as UTF8
@@ -156,9 +155,6 @@ tex2pdf' verbose args tmpDir program source = do
        (ExitSuccess, Nothing)  -> return $ Left ""
        (ExitSuccess, Just pdf) -> return $ Right pdf
 
-(<>) :: ByteString -> ByteString -> ByteString
-(<>) = B.append
-
 -- parsing output
 
 extractMsg :: ByteString -> ByteString