Merge pull request haskell#786 from phadej/ord-value

Add Ord Value

Data/Aeson/Types/Internal.hs

@@ -4,6 +4,7 @@
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE Rank2Types #-}
+{-# LANGUAGE StandaloneDeriving #-}
 #if __GLASGOW_HASKELL__ >= 800
 -- a) THQ works on cross-compilers and unregisterised GHCs
 -- b) may make compilation faster as no dynamic loading is ever needed (not sure about this)
@@ -367,6 +368,17 @@ data Value = Object !Object
            | Null
              deriving (Eq, Read, Show, Typeable, Data, Generic)
 
+-- |
+--
+-- The ordering is total, consistent with 'Eq' innstance.
+-- However, nothing else about the ordering is specified,
+-- and it may change from environment to environment and version to version
+-- of either this package or its dependencies ('hashable' and 'unordered-containers').
+--
+-- @since 1.5.2.0
+deriving instance Ord Value
+-- standalone deriving to attach since annotation.
+
 -- | A newtype wrapper for 'UTCTime' that uses the same non-standard
 -- serialization format as Microsoft .NET, whose
 -- <https://msdn.microsoft.com/en-us/library/system.datetime(v=vs.110).aspx System.DateTime>

aeson.cabal

@@ -133,22 +133,17 @@ library
     build-depends: nats >= 1.1.1 && < 1.2,
                    void >= 0.7.2 && < 0.8
 
-  -- cannot use latest version
-  build-depends:
-    unordered-containers >= 0.2.8.0  && < 0.3,
-
-    -- not in LTS-12.10
-    tagged               >= 0.8.5    && < 0.9,
-    primitive            >= 0.6.3.0  && < 0.8
-
   -- Other dependencies
   build-depends:
     attoparsec           >= 0.13.2.2 && < 0.14,
     dlist                >= 0.8.0.4  && < 0.9,
     hashable             >= 1.2.7.0  && < 1.4,
+    primitive            >= 0.7.0.1  && < 0.8,
     scientific           >= 0.3.6.2  && < 0.4,
+    tagged               >= 0.8.6    && < 0.9,
     th-abstraction       >= 0.2.8.0  && < 0.4,
     these                >= 1.1      && < 1.2,
+    unordered-containers >= 0.2.10.0 && < 0.3,
     uuid-types           >= 1.0.3    && < 1.1,
     vector               >= 0.12.0.1 && < 0.13
 

changelog.md

@@ -1,5 +1,9 @@
 For the latest version of this document, please see [https://github.com/bos/aeson/blob/master/changelog.md](https://github.com/bos/aeson/blob/master/changelog.md).
 
+### 1.5.2.0
+
+* Add `Ord Value` instance
+
 ### 1.5.1.0
 
 * Add instances for `these`, thanks to Oleg Grenrus.