From 4d85ce5584c5bc69b402b7d3b94c623f37ea69f5 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Sun, 27 Jan 2019 18:52:25 +0100
Subject: src: replace all undefined with typeMismatch

---
 src/Data/ByteString/Char8/Extended.hs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'src/Data/ByteString')

diff --git a/src/Data/ByteString/Char8/Extended.hs b/src/Data/ByteString/Char8/Extended.hs
index ca0c44a..8bf76c7 100644
--- a/src/Data/ByteString/Char8/Extended.hs
+++ b/src/Data/ByteString/Char8/Extended.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE LambdaCase #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 module Data.ByteString.Char8.Extended
     ( module Data.ByteString.Char8
@@ -5,14 +6,16 @@ module Data.ByteString.Char8.Extended
     ) where
 
 import Data.Aeson
+import Data.Aeson.Types (typeMismatch)
 import Data.ByteString.Char8
 import Data.Text.Encoding (encodeUtf8)
 import Prelude hiding (show)
 import qualified Prelude
 
 instance FromJSON ByteString where
-  parseJSON (String t) = pure (encodeUtf8 t)
-  parseJSON _ = pure undefined
+  parseJSON = \case
+      String t -> pure (encodeUtf8 t)
+      invalid -> typeMismatch "ByteString" invalid
 
 instance FromJSONKey ByteString where
   fromJSONKey = FromJSONKeyText encodeUtf8
-- 
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