Support for MonadFail since GHC 8.8.1

Text/JSON5.hs

@@ -136,6 +136,7 @@ instance MonadPlus Result where
   _ `mplus` x    = x
   mzero          = Error "Result: MonadPlus.empty"
 
+#if __GLASGOW_HASKELL__ >= 808
 instance Monad Result where
   return x      = Ok x
   Ok a >>= f    = f a
@@ -144,6 +145,14 @@ instance Monad Result where
 instance MonadFail Result where
   fail x        = Error x
 
+#else
+instance Monad Result where
+  return x      = Ok x
+  fail x        = Error x
+  Ok a >>= f    = f a
+  Error x >>= _ = Error x
+#endif
+
 mkError :: String -> Result a
 mkError s = Error s
 

Text/JSON5/String.hs

@@ -1,5 +1,5 @@
+{-# LANGUAGE CPP #-}
 -- | Basic support for working with JSON5 values.
-
 module Text.JSON5.String
      (
        -- * Parsing
@@ -55,6 +55,7 @@ instance A.Applicative GetJSON where
   pure  = return
   (<*>) = ap
 
+#if __GLASGOW_HASKELL__ >= 808
 instance Monad GetJSON where
   return x        = GetJSON (\s -> Right (x,s))
   GetJSON m >>= f = GetJSON (\s -> case m s of
@@ -64,6 +65,15 @@ instance Monad GetJSON where
 instance MonadFail GetJSON where
   fail x          = GetJSON (\_ -> Left x)
 
+#else
+instance Monad GetJSON where
+  return x        = GetJSON (\s -> Right (x,s))
+  fail x          = GetJSON (\_ -> Left x)
+  GetJSON m >>= f = GetJSON (\s -> case m s of
+                                     Left err -> Left err
+                                     Right (a,s1) -> un (f a) s1)
+#endif
+
 -- | Run a JSON5 reader on an input String, returning some Haskell value.
 -- All input will be consumed.
 runGetJSON :: GetJSON a -> String -> Either String a

json5hs.cabal

@@ -1,5 +1,5 @@
 name:               json5hs
-version:            0.1.2.2
+version:            0.1.3.1
 synopsis:           Serialising to and from JSON5
 description:
     The JSON5 Data Interchange Format (JSON5) is a superset of JSON
@@ -12,14 +12,14 @@ category:           Web, Text, JSON5
 license:            BSD3
 license-file:       LICENSE
 author:             Yang X. Nan
-maintainer:         [email protected]
+maintainer:         [email protected]
 Copyright:          2019 Yang X. Nan
-cabal-version:      >= 1.6
+cabal-version:      >= 1.10
 build-type: Simple
 
 source-repository head
     type:     git
-    location: https://github.com/sakamitz/json5hs.git
+    location: https://github.com/typowritter/json5hs.git
 
 flag split-base
   default: True
@@ -40,6 +40,7 @@ library
                    Text.JSON5.Types,
                    Text.JSON5.String
   ghc-options:     -Wall -O2
+  default-language:    Haskell2010
 
   if flag(split-base)
     if flag(generic)