Drop support for pre-7.6 GHC

* Bump base dependency
* Bump `array` dependency
* Assume at least 7.6 when compiling with GHC
* Drop support for compiling without MIN_VERSION macros. These
  are now built into GHC. We can add some sort of support back
  if we expand to a non-GHC compiler, but that support will look
  completely different anyway.
* Remove deprecated `Data.Map.Lazy.Merge` and `Data.Map.Strict.Merge`
  modules. These were renamed almost immediately after they were
  introduced.
* Update changelog

Author: treeowl

.travis.yml

@@ -2,10 +2,6 @@
 
 # See also https://github.com/hvr/multi-ghc-travis for more information
 env:
- - GHCVER=7.0.4 CABALVER=1.16
- # we have to use CABALVER=1.16 for GHC<7.6 as well, as there's
- # no package for earlier cabal versions in the PPA
- - GHCVER=7.4.2 CABALVER=1.16
  - GHCVER=7.6.3 CABALVER=1.16
  - GHCVER=7.8.4 CABALVER=1.18
  - GHCVER=7.10.3 CABALVER=1.22

Data/Containers/ListUtils.hs

@@ -1,6 +1,6 @@
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE BangPatterns #-}
-#if __GLASGOW_HASKELL__ >= 703
+#ifdef __GLASGOW_HASKELL__
 {-# LANGUAGE Trustworthy #-}
 #endif
 

Data/Graph.hs

@@ -1,15 +1,10 @@
 {-# LANGUAGE CPP #-}
 #if __GLASGOW_HASKELL__
-{-# LANGUAGE Rank2Types #-}
+{-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE DeriveDataTypeable #-}
-{-# LANGUAGE StandaloneDeriving #-}
-#endif
-#if __GLASGOW_HASKELL__ >= 703
-{-# LANGUAGE Trustworthy #-}
-#endif
-#if __GLASGOW_HASKELL__ >= 702
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE Trustworthy #-}
 #endif
 
 #include "containers.h"
@@ -120,15 +115,11 @@ import Data.List
 import Data.Functor.Classes
 import Data.Semigroup (Semigroup (..))
 #endif
-#if __GLASGOW_HASKELL__ >= 706
-import GHC.Generics (Generic, Generic1)
-#elif __GLASGOW_HASKELL__ >= 702
-import GHC.Generics (Generic)
-#endif
 #ifdef __GLASGOW_HASKELL__
+import GHC.Generics (Generic, Generic1)
 import Data.Data (Data)
-#endif
 import Data.Typeable
+#endif
 
 
 -------------------------------------------------------------------------
@@ -156,14 +147,10 @@ INSTANCE_TYPEABLE1(SCC)
 #ifdef __GLASGOW_HASKELL__
 -- | @since 0.5.9
 deriving instance Data vertex => Data (SCC vertex)
-#endif
 
-#if __GLASGOW_HASKELL__ >= 706
 -- | @since 0.5.9
 deriving instance Generic1 SCC
-#endif
 
-#if __GLASGOW_HASKELL__ >= 702
 -- | @since 0.5.9
 deriving instance Generic (SCC vertex)
 #endif

Data/IntMap.hs

@@ -1,5 +1,5 @@
 {-# LANGUAGE CPP #-}
-#if !defined(TESTING) && __GLASGOW_HASKELL__ >= 703
+#if !defined(TESTING) && defined(__GLASGOW_HASKELL__)
 {-# LANGUAGE Safe #-}
 #endif
 

Data/IntMap/Internal.hs

@@ -5,7 +5,7 @@
 {-# LANGUAGE MagicHash, DeriveDataTypeable, StandaloneDeriving #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 #endif
-#if !defined(TESTING) && __GLASGOW_HASKELL__ >= 703
+#if !defined(TESTING) && defined(__GLASGOW_HASKELL__)
 {-# LANGUAGE Trustworthy #-}
 #endif
 #if __GLASGOW_HASKELL__ >= 708
@@ -444,13 +444,10 @@ instance Foldable.Foldable IntMap where
           go (Tip _ v) = f v
           go (Bin _ _ l r) = go l `mappend` go r
   {-# INLINE foldMap #-}
-
-#if MIN_VERSION_base(4,6,0)
   foldl' = foldl'
   {-# INLINE foldl' #-}
   foldr' = foldr'
   {-# INLINE foldr' #-}
-#endif
 #if MIN_VERSION_base(4,8,0)
   length = size
   {-# INLINE length #-}

Data/IntMap/Lazy.hs

@@ -1,5 +1,5 @@
 {-# LANGUAGE CPP #-}
-#if !defined(TESTING) && __GLASGOW_HASKELL__ >= 703
+#if !defined(TESTING) && defined(__GLASGOW_HASKELL__)
 {-# LANGUAGE Safe #-}
 #endif
 

Data/IntMap/Merge/Lazy.hs

@@ -3,7 +3,7 @@
 #if __GLASGOW_HASKELL__
 {-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}
 #endif
-#if !defined(TESTING) && __GLASGOW_HASKELL__ >= 703
+#if !defined(TESTING) && defined(__GLASGOW_HASKELL__)
 {-# LANGUAGE Safe #-}
 #endif
 #if __GLASGOW_HASKELL__ >= 708

Data/IntMap/Merge/Strict.hs

@@ -3,7 +3,7 @@
 #if __GLASGOW_HASKELL__
 {-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}
 #endif
-#if !defined(TESTING) && __GLASGOW_HASKELL__ >= 703
+#if !defined(TESTING) && defined(__GLASGOW_HASKELL__)
 {-# LANGUAGE Safe #-}
 #endif
 #if __GLASGOW_HASKELL__ >= 708

Data/IntMap/Strict.hs

@@ -1,6 +1,6 @@
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE BangPatterns #-}
-#if !defined(TESTING) && __GLASGOW_HASKELL__ >= 703
+#if !defined(TESTING) && defined(__GLASGOW_HASKELL__)
 {-# LANGUAGE Trustworthy #-}
 #endif
 

Data/IntSet.hs

@@ -1,5 +1,5 @@
 {-# LANGUAGE CPP #-}
-#if !defined(TESTING) && __GLASGOW_HASKELL__ >= 703
+#if !defined(TESTING) && defined(__GLASGOW_HASKELL__)
 {-# LANGUAGE Safe #-}
 #endif