From a55a1e3a573d554677a85f2398e975ab71846997 Mon Sep 17 00:00:00 2001
From: Jesse Rosenthal <jrosenthal@jhu.edu>
Date: Tue, 2 Jan 2018 11:45:22 -0500
Subject: Docx reader: remove MultiWayIf

Different formatting rules across 7.X and 8.X. Use empty case
expression instead.
---
 src/Text/Pandoc/Readers/Docx.hs | 77 +++++++++++++++++++++--------------------
 1 file changed, 39 insertions(+), 38 deletions(-)

diff --git a/src/Text/Pandoc/Readers/Docx.hs b/src/Text/Pandoc/Readers/Docx.hs
index e79c4a4fc..f01a94550 100644
--- a/src/Text/Pandoc/Readers/Docx.hs
+++ b/src/Text/Pandoc/Readers/Docx.hs
@@ -1,7 +1,6 @@
 {-# LANGUAGE CPP               #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternGuards     #-}
-{-# LANGUAGE MultiWayIf        #-}
 {-
 Copyright (C) 2014-2017 Jesse Rosenthal <jrosenthal@jhu.edu>
 
@@ -575,43 +574,45 @@ bodyPartToBlocks (Paragraph pPr parparts)
                           (if isNull prevParaIls then mempty else space) <>
                           ils'
               opts <- asks docxOptions
-              if | isNull ils'' && not (isEnabled Ext_empty_paragraphs opts) ->
-                     return mempty
-                 | Just (TrackedChange Insertion _) <- pChange pPr
-                 , AcceptChanges <- readerTrackChanges opts -> do
-                     modify $ \s -> s {docxPrevPara = mempty}
-                     return $ parStyleToTransform pPr $ para ils''
-                 | Just (TrackedChange Insertion _) <- pChange pPr
-                 , RejectChanges <- readerTrackChanges opts -> do
-                     modify $ \s -> s {docxPrevPara = ils''}
-                     return mempty
-                 | Just (TrackedChange Insertion cInfo) <- pChange pPr
-                 , AllChanges <- readerTrackChanges opts
-                 , ChangeInfo _ cAuthor cDate <- cInfo -> do
-                     let attr = ("", ["paragraph-insertion"], [("author", cAuthor), ("date", cDate)])
-                         insertMark = spanWith attr mempty
-                     return $
-                       parStyleToTransform pPr $
-                       para $ ils'' <> insertMark
-                 | Just (TrackedChange Deletion _) <- pChange pPr
-                 , AcceptChanges <- readerTrackChanges opts -> do
-                     modify $ \s -> s {docxPrevPara = ils''}
-                     return mempty
-                 | Just (TrackedChange Deletion _) <- pChange pPr
-                 , RejectChanges <- readerTrackChanges opts -> do
-                     modify $ \s -> s {docxPrevPara = mempty}
-                     return $ parStyleToTransform pPr $ para ils''
-                 | Just (TrackedChange Deletion cInfo) <- pChange pPr
-                 , AllChanges <- readerTrackChanges opts
-                 , ChangeInfo _ cAuthor cDate <- cInfo -> do
-                     let attr = ("", ["paragraph-deletion"], [("author", cAuthor), ("date", cDate)])
-                         insertMark = spanWith attr mempty
-                     return $
-                       parStyleToTransform pPr $
-                       para $ ils'' <> insertMark
-                 | otherwise -> do
-                     modify $ \s -> s {docxPrevPara = mempty}
-                     return $ parStyleToTransform pPr $ para ils''
+              case () of
+
+                _ | isNull ils'' && not (isEnabled Ext_empty_paragraphs opts) ->
+                    return mempty
+                _ | Just (TrackedChange Insertion _) <- pChange pPr
+                  , AcceptChanges <- readerTrackChanges opts -> do
+                      modify $ \s -> s {docxPrevPara = mempty}
+                      return $ parStyleToTransform pPr $ para ils''
+                _ | Just (TrackedChange Insertion _) <- pChange pPr
+                  , RejectChanges <- readerTrackChanges opts -> do
+                      modify $ \s -> s {docxPrevPara = ils''}
+                      return mempty
+                _ | Just (TrackedChange Insertion cInfo) <- pChange pPr
+                  , AllChanges <- readerTrackChanges opts
+                  , ChangeInfo _ cAuthor cDate <- cInfo -> do
+                      let attr = ("", ["paragraph-insertion"], [("author", cAuthor), ("date", cDate)])
+                          insertMark = spanWith attr mempty
+                      return $
+                        parStyleToTransform pPr $
+                        para $ ils'' <> insertMark
+                _ | Just (TrackedChange Deletion _) <- pChange pPr
+                  , AcceptChanges <- readerTrackChanges opts -> do
+                      modify $ \s -> s {docxPrevPara = ils''}
+                      return mempty
+                _ | Just (TrackedChange Deletion _) <- pChange pPr
+                  , RejectChanges <- readerTrackChanges opts -> do
+                      modify $ \s -> s {docxPrevPara = mempty}
+                      return $ parStyleToTransform pPr $ para ils''
+                _ | Just (TrackedChange Deletion cInfo) <- pChange pPr
+                  , AllChanges <- readerTrackChanges opts
+                  , ChangeInfo _ cAuthor cDate <- cInfo -> do
+                      let attr = ("", ["paragraph-deletion"], [("author", cAuthor), ("date", cDate)])
+                          insertMark = spanWith attr mempty
+                      return $
+                        parStyleToTransform pPr $
+                        para $ ils'' <> insertMark
+                _ | otherwise -> do
+                      modify $ \s -> s {docxPrevPara = mempty}
+                      return $ parStyleToTransform pPr $ para ils''
 bodyPartToBlocks (ListItem pPr numId lvl (Just levelInfo) parparts) = do
   -- We check whether this current numId has previously been used,
   -- since Docx expects us to pick up where we left off.
-- 
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