From d2ee5b2b0eb2afb970ab8d4feed84434dc8236e0 Mon Sep 17 00:00:00 2001
From: Veronika Romashkina <vrom911@gmail.com>
Date: Wed, 26 Feb 2020 10:49:03 +0000
Subject: Support GHC-8.8

Add MonadFail instances and constraints.
---
 lib/Hakyll/Web/Template/Context.hs | 2 +-
 lib/Hakyll/Web/Template/List.hs    | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

(limited to 'lib/Hakyll/Web')

diff --git a/lib/Hakyll/Web/Template/Context.hs b/lib/Hakyll/Web/Template/Context.hs
index 8627d5b..a5049c2 100644
--- a/lib/Hakyll/Web/Template/Context.hs
+++ b/lib/Hakyll/Web/Template/Context.hs
@@ -365,7 +365,7 @@ dateFieldWith locale key format = field key $ \i -> do
 -- | Parser to try to extract and parse the time from the @published@
 -- field or from the filename. See 'dateField' for more information.
 -- Exported for user convenience.
-getItemUTC :: MonadMetadata m
+getItemUTC :: (MonadMetadata m, MonadFail m)
            => TimeLocale        -- ^ Output time locale
            -> Identifier        -- ^ Input page
            -> m UTCTime         -- ^ Parsed UTCTime
diff --git a/lib/Hakyll/Web/Template/List.hs b/lib/Hakyll/Web/Template/List.hs
index 4d769fc..db3fff1 100644
--- a/lib/Hakyll/Web/Template/List.hs
+++ b/lib/Hakyll/Web/Template/List.hs
@@ -60,7 +60,7 @@ applyJoinTemplateList delimiter tpl context items = do
 --------------------------------------------------------------------------------
 -- | Sort pages chronologically. Uses the same method as 'dateField' for
 -- extracting the date.
-chronological :: MonadMetadata m => [Item a] -> m [Item a]
+chronological :: (MonadMetadata m, MonadFail m) => [Item a] -> m [Item a]
 chronological =
     sortByM $ getItemUTC defaultTimeLocale . itemIdentifier
   where
@@ -71,14 +71,14 @@ chronological =
 
 --------------------------------------------------------------------------------
 -- | The reverse of 'chronological'
-recentFirst :: MonadMetadata m => [Item a] -> m [Item a]
+recentFirst :: (MonadMetadata m, MonadFail m) => [Item a] -> m [Item a]
 recentFirst = liftM reverse . chronological
 
 
 --------------------------------------------------------------------------------
 -- | Version of 'chronological' which doesn't need the actual items.
 sortChronological
-    :: MonadMetadata m => [Identifier] -> m [Identifier]
+    :: (MonadMetadata m, MonadFail m) => [Identifier] -> m [Identifier]
 sortChronological ids =
     liftM (map itemIdentifier) $ chronological [Item i () | i <- ids]
 
@@ -86,6 +86,6 @@ sortChronological ids =
 --------------------------------------------------------------------------------
 -- | Version of 'recentFirst' which doesn't need the actual items.
 sortRecentFirst
-    :: MonadMetadata m => [Identifier] -> m [Identifier]
+    :: (MonadMetadata m, MonadFail m) => [Identifier] -> m [Identifier]
 sortRecentFirst ids =
     liftM (map itemIdentifier) $ recentFirst [Item i () | i <- ids]
-- 
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