Merge pull request #12018 from haskell/ghc2021

Switch default-language to GHC2021 instead of Haskell2010

Author: mergify[bot]

Cabal-QuickCheck/Cabal-QuickCheck.cabal

@@ -8,7 +8,7 @@ description:
   Provides QuickCheck Arbitrary instances for some types in Cabal
 
 library
-  default-language: Haskell2010
+  default-language: GHC2021
   hs-source-dirs:   src
   ghc-options:      -Wall
   build-depends:

Cabal-QuickCheck/src/Test/QuickCheck/GenericArbitrary.hs

@@ -1,6 +1,4 @@
-{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs            #-}
-{-# LANGUAGE TypeOperators #-}
 module Test.QuickCheck.GenericArbitrary (
     genericArbitrary,
     GArbitrary,

Cabal-QuickCheck/src/Test/QuickCheck/Instances/Cabal.hs

@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP           #-}
-{-# LANGUAGE FlexibleInstances #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 module Test.QuickCheck.Instances.Cabal () where
 

Cabal-described/Cabal-described.cabal

@@ -7,7 +7,7 @@ description:   Provides rere bindings
 build-type:    Simple
 
 library
-  default-language: Haskell2010
+  default-language: GHC2021
   hs-source-dirs:   src
   ghc-options:      -Wall
   build-depends:

Cabal-described/src/Distribution/Described.hs

@@ -1,6 +1,4 @@
-{-# LANGUAGE FlexibleInstances   #-}
 {-# LANGUAGE OverloadedStrings   #-}
-{-# LANGUAGE ScopedTypeVariables #-}
 module Distribution.Described (
     Described (..),
     describeDoc,

Cabal-described/src/Distribution/Utils/CharSet.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE BangPatterns #-}
 -- | Sets of characters.
 --
 -- Using this is more efficient than 'RE.Type.Alt':ng individual characters.

Cabal-described/src/Distribution/Utils/GrammarRegex.hs

@@ -1,6 +1,4 @@
-{-# LANGUAGE DeriveTraversable   #-}
 {-# LANGUAGE OverloadedStrings   #-}
-{-# LANGUAGE ScopedTypeVariables #-}
 module Distribution.Utils.GrammarRegex (
     -- * Regular expressions
     GrammarRegex (..),

Cabal-hooks/Cabal-hooks.cabal

@@ -23,7 +23,7 @@ source-repository head
   subdir:   Cabal-hooks
 
 library
-  default-language: Haskell2010
+  default-language: GHC2021
   hs-source-dirs: src
 
   build-depends:

Cabal-hooks/src/Distribution/Simple/SetupHooks.hs

@@ -1,10 +1,6 @@
-{-# LANGUAGE BangPatterns #-}
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DerivingStrategies #-}
 {-# LANGUAGE DuplicateRecordFields #-}
-{-# LANGUAGE NamedFieldPuns #-}
-{-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE StaticPointers #-}
 
 {-# OPTIONS_GHC -Wno-unticked-promoted-constructors #-}

Cabal-syntax/Cabal-syntax.cabal

@@ -24,7 +24,9 @@ source-repository head
   subdir:   Cabal-syntax
 
 library
-  default-language: Haskell2010
+  default-language: GHC2021
+  -- Disabling ImportQualifiedPost, otherwise fourmolu jumps ahead to apply it everywhere
+  default-extensions: NoImportQualifiedPost
   hs-source-dirs: src
 
   build-depends: