Allow GHC 8.0

Author: pgujjula

apply-merge.cabal

@@ -18,7 +18,8 @@ copyright:      Preetham Gujjula
 license:        BSD-3-Clause
 build-type:     Simple
 tested-with:
-    GHC == 8.2.2
+    GHC == 8.0.2
+  , GHC == 8.2.2
   , GHC == 8.4.4
   , GHC == 8.6.5
   , GHC == 8.8.4
@@ -58,7 +59,7 @@ library
   ghc-options: -Wall
   build-depends:
       array ==0.5.*
-    , base >=4.10 && <4.11 || >=4.11 && <4.12 || >=4.12 && <4.13 || >=4.13 && <4.14 || >=4.14 && <4.15 || >=4.15 && <4.16 || >=4.16 && <4.17 || >=4.17 && <4.18 || >=4.18 && <4.19 || >=4.19 && <4.20 || >=4.20 && <4.21
+    , base >=4.9 && <4.10 || >=4.10 && <4.11 || >=4.11 && <4.12 || >=4.12 && <4.13 || >=4.13 && <4.14 || >=4.14 && <4.15 || >=4.15 && <4.16 || >=4.16 && <4.17 || >=4.17 && <4.18 || >=4.18 && <4.19 || >=4.19 && <4.20 || >=4.20 && <4.21
     , containers >=0.6 && <0.7 || >=0.7 && <0.8
     , pqueue >=1.4 && <1.5 || >=1.5 && <1.6
     , reflection ==2.1.*
@@ -100,7 +101,7 @@ test-suite apply-merge-tests
   ghc-options: -Wall
   build-depends:
       array ==0.5.*
-    , base >=4.10 && <4.11 || >=4.11 && <4.12 || >=4.12 && <4.13 || >=4.13 && <4.14 || >=4.14 && <4.15 || >=4.15 && <4.16 || >=4.16 && <4.17 || >=4.17 && <4.18 || >=4.18 && <4.19 || >=4.19 && <4.20 || >=4.20 && <4.21
+    , base >=4.9 && <4.10 || >=4.10 && <4.11 || >=4.11 && <4.12 || >=4.12 && <4.13 || >=4.13 && <4.14 || >=4.14 && <4.15 || >=4.15 && <4.16 || >=4.16 && <4.17 || >=4.17 && <4.18 || >=4.18 && <4.19 || >=4.19 && <4.20 || >=4.20 && <4.21
     , containers >=0.6 && <0.7 || >=0.7 && <0.8
     , data-ordlist ==0.4.*
     , pqueue >=1.4 && <1.5 || >=1.5 && <1.6
@@ -145,7 +146,7 @@ benchmark apply-merge-benchmarks
   ghc-options: -Wall
   build-depends:
       array ==0.5.*
-    , base >=4.10 && <4.11 || >=4.11 && <4.12 || >=4.12 && <4.13 || >=4.13 && <4.14 || >=4.14 && <4.15 || >=4.15 && <4.16 || >=4.16 && <4.17 || >=4.17 && <4.18 || >=4.18 && <4.19 || >=4.19 && <4.20 || >=4.20 && <4.21
+    , base >=4.9 && <4.10 || >=4.10 && <4.11 || >=4.11 && <4.12 || >=4.12 && <4.13 || >=4.13 && <4.14 || >=4.14 && <4.15 || >=4.15 && <4.16 || >=4.16 && <4.17 || >=4.17 && <4.18 || >=4.18 && <4.19 || >=4.19 && <4.20 || >=4.20 && <4.21
     , containers >=0.6 && <0.7 || >=0.7 && <0.8
     , data-ordlist ==0.4.*
     , pqueue >=1.4 && <1.5 || >=1.5 && <1.6

bench/Bench/ApplyMerge.hs

@@ -82,7 +82,14 @@ collapseToBenchmark name collapse = bgroup name (map mkBench [1 .. 6])
       let limit :: Int
           limit = 10 ^ i
 
-          applyMerges :: [(String, ApplyMerge)]
+          -- For some reason, GHC 8.0 complains if we set the signature
+          --   applyMerges :: [(String, ApplyMerge)]
+          -- We can remove this hack once we drop support for GHC 8.0
+          applyMerges ::
+            [ ( String,
+                forall a b c. (Ord c) => (a -> b -> c) -> [a] -> [b] -> [c]
+              )
+            ]
           applyMerges =
             [ ("DoublyLinkedList", ApplyMerge.DoublyLinkedList.applyMerge),
               ("IntMap", ApplyMerge.IntMap.applyMerge),

package.yaml

@@ -14,6 +14,7 @@ copyright:    "Preetham Gujjula"
 license:      BSD-3-Clause
 
 tested-with:
+- GHC == 8.0.2
 - GHC == 8.2.2
 - GHC == 8.4.4
 - GHC == 8.6.5
@@ -51,7 +52,7 @@ when:
   - -Wunused-packages
 
 dependencies:
-- base ^>= {4.10, 4.11, 4.12, 4.13, 4.14, 4.15, 4.16, 4.17, 4.18, 4.19, 4.20}
+- base ^>= {4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.15, 4.16, 4.17, 4.18, 4.19, 4.20}
 
 library:
   source-dirs: src