made use of common settings

haskell-experiments/haskell-experiments.cabal

@@ -51,21 +51,18 @@ extra-doc-files:    CHANGELOG.md
 -- Extra source files to be distributed with the package, such as examples, or a tutorial module.
 -- extra-source-files:
 
+common commonSettings
+  -- Base language which the package is written in.
+  default-language: Haskell2010
+  default-extensions:
+    OverloadedStrings 
+
 common warnings
     ghc-options: -Wall
 
 test-suite haskell-exps-test
   -- Import common warning flags.
-  import:           warnings
+  import: warnings, commonSettings
-
-  -- Base language which the package is written in.
-  default-language: Haskell2010
-
-  -- Modules included in this executable, other than Main.
-  -- other-modules:
-
-  -- LANGUAGE extensions used by modules in this package.
-  -- other-extensions:
 
   -- The interface type and version of the test suite.
   type:             exitcode-stdio-1.0
@@ -83,11 +80,9 @@ test-suite haskell-exps-test
     Test.ArithmeticParserSpec,
     Test.Datalog.DatalogParserSpec,
     Test.Datalog.InMemoryDBSpec
-  default-extensions:
-    OverloadedStrings 
 
 library langfeatures
-  default-language: Haskell2010
+  import: warnings, commonSettings
   build-depends:   base, containers, megaparsec, parser-combinators, text
   hs-source-dirs:  src
   exposed-modules: Ologs
@@ -97,15 +92,11 @@ library langfeatures
     Datalog.InMemoryDB
     Datalog.Rules
     Datalog.DatalogDB
-  ghc-options:     -Wall
-  default-extensions:
-    OverloadedStrings 
 
 executable haskell-experiments
-  default-language: Haskell2010
+  import: warnings, commonSettings
   build-depends:    base, containers
   main-is:          Main.hs
   hs-source-dirs:   src
-  default-extensions:
+
-    OverloadedStrings