Use NoImplicitPrelude and explicitly import Prelude.

This seems to be necessary if we are to use our custom Prelude
with ghci.

Closes #4464.

3 files changed, 6 insertions, 0 deletions

diff --git a/src/Text/Pandoc/Filter/JSON.hs b/src/Text/Pandoc/Filter/JSON.hs
index 5772c2c41..97b291603 100644
--- a/src/Text/Pandoc/Filter/JSON.hs
+++ b/src/Text/Pandoc/Filter/JSON.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE NoImplicitPrelude #-}
 {-
 Copyright (C) 2006-2018 John MacFarlane <jgm@berkeley.edu>
 
@@ -29,6 +30,7 @@ Programmatically modifications of pandoc documents via JSON filters.
 -}
 module Text.Pandoc.Filter.JSON (apply) where
 
+import Prelude
 import Control.Monad (unless, when)
 import Control.Monad.Trans (MonadIO (liftIO))
 import Data.Aeson (eitherDecode', encode)
diff --git a/src/Text/Pandoc/Filter/Lua.hs b/src/Text/Pandoc/Filter/Lua.hs
index 597a31cbc..d559fb912 100644
--- a/src/Text/Pandoc/Filter/Lua.hs
+++ b/src/Text/Pandoc/Filter/Lua.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE NoImplicitPrelude #-}
 {-
 Copyright (C) 2006-2018 John MacFarlane <jgm@berkeley.edu>
 
@@ -29,6 +30,7 @@ Apply Lua filters to modify a pandoc documents programmatically.
 -}
 module Text.Pandoc.Filter.Lua (apply) where
 
+import Prelude
 import Control.Exception (throw)
 import Text.Pandoc.Class (PandocIO)
 import Text.Pandoc.Definition (Pandoc)
diff --git a/src/Text/Pandoc/Filter/Path.hs b/src/Text/Pandoc/Filter/Path.hs
index 8074bcbb7..f244597aa 100644
--- a/src/Text/Pandoc/Filter/Path.hs
+++ b/src/Text/Pandoc/Filter/Path.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE NoImplicitPrelude #-}
 {-
 Copyright (C) 2006-2018 John MacFarlane <jgm@berkeley.edu>
 
@@ -31,6 +32,7 @@ module Text.Pandoc.Filter.Path
   ( expandFilterPath
   ) where
 
+import Prelude
 import Text.Pandoc.Class (PandocMonad, fileExists, getUserDataDir)
 import System.FilePath ((</>), isRelative)