Easy hlint fixes

GenChangelogs.hs

@@ -33,4 +33,4 @@ main = do
   forM_ prsAfterLastTag $ \SimplePullRequest{..} ->
     putStrLn $ T.unpack $ "- " <> simplePullRequestTitle <>
       "\n([#" <> T.pack (show $ unIssueNumber simplePullRequestNumber) <> ")](" <> getUrl simplePullRequestHtmlUrl <> ")" <>
-      " by @" <> (untagName (simpleUserLogin simplePullRequestUser))
+      " by @" <> untagName (simpleUserLogin simplePullRequestUser)

exe/Main.hs

@@ -16,7 +16,7 @@ main = withUtf8 $ do
 
     let withExamples =
             case args of
-                LspMode (LspArguments{..}) -> argsExamplePlugin
-                _                          -> False
+                LspMode LspArguments{..} -> argsExamplePlugin
+                _                        -> False
 
     defaultMain args (idePlugins withExamples)

exe/Wrapper.hs

@@ -73,7 +73,7 @@ launchHaskellLanguageServer LspArguments{..} = do
   hPutStrLn stderr $ showProgramVersionOfInterest programsOfInterest
   hPutStrLn stderr ""
   -- Get the ghc version -- this might fail!
-  hPutStrLn stderr $ "Consulting the cradle to get project GHC version..."
+  hPutStrLn stderr "Consulting the cradle to get project GHC version..."
   ghcVersion <- getRuntimeGhcVersion' cradle
   hPutStrLn stderr $ "Project GHC version: " ++ ghcVersion
 
@@ -136,12 +136,11 @@ getRuntimeGhcVersion' cradle = do
 -- of the project that may or may not be accurate.
 findLocalCradle :: FilePath -> IO (Cradle Void)
 findLocalCradle fp = do
-  cradleConf <- (findCradle defaultLoadingOptions) fp
+  cradleConf <- findCradle defaultLoadingOptions fp
   crdl       <- case cradleConf of
     Just yaml -> do
       hPutStrLn stderr $ "Found \"" ++ yaml ++ "\" for \"" ++ fp ++ "\""
       loadCradle yaml
     Nothing -> loadImplicitCradle fp
   hPutStrLn stderr $ "Module \"" ++ fp ++ "\" is loaded by Cradle: " ++ show crdl
   return crdl
-

ghcide/test/src/Development/IDE/Test.hs

@@ -168,7 +168,7 @@ checkDiagnosticsForDoc :: TextDocumentIdentifier -> [(DiagnosticSeverity, Cursor
 checkDiagnosticsForDoc TextDocumentIdentifier {_uri} expected obtained = do
     let expected' = Map.fromList [(nuri, map (\(ds, c, t) -> (ds, c, t, Nothing)) expected)]
         nuri = toNormalizedUri _uri
-    expectDiagnosticsWithTags' (return $ (_uri, List obtained)) expected'
+    expectDiagnosticsWithTags' (return (_uri, List obtained)) expected'
 
 canonicalizeUri :: Uri -> IO Uri
 canonicalizeUri uri = filePathToUri <$> canonicalizePath (fromJust (uriToFilePath uri))

hie-compat/src-ghc86/Compat/HieBin.hs

@@ -97,7 +97,7 @@ writeHieFile hie_file_path hiefile = do
   -- hieVersion and the GHC version used to generate this file
   mapM_ (putByte bh0) hieMagic
   putBinLine bh0 $ BSC.pack $ show hieVersion
-  putBinLine bh0 $ ghcVersion
+  putBinLine bh0 ghcVersion
 
   -- remember where the dictionary pointer will go
   dict_p_p <- tellBin bh0
@@ -297,7 +297,7 @@ getSymbolTable bh ncu = do
 getSymTabName :: SymbolTable -> BinHandle -> IO Name
 getSymTabName st bh = do
   i :: Word32 <- get bh
-  return $ st A.! (fromIntegral i)
+  return $ st A.! fromIntegral i
 
 putName :: HieSymbolTable -> BinHandle -> Name -> IO ()
 putName (HieSymbolTable next ref) bh name = do

hie-compat/src-ghc86/Compat/HieDebug.hs

@@ -1,7 +1,6 @@
 {-
 Functions to validate and check .hie file ASTs generated by GHC.
 -}
-{-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleContexts #-}
 module Compat.HieDebug where
@@ -22,10 +21,10 @@ import Data.Function    ( on )
 import Data.List        ( sortOn )
 import Data.Foldable    ( toList )
 
-ppHies :: Outputable a => (HieASTs a) -> SDoc
+ppHies :: Outputable a => HieASTs a -> SDoc
 ppHies (HieASTs asts) = M.foldrWithKey go "" asts
   where
-    go k a rest = vcat $
+    go k a rest = vcat
       [ "File: " <> ppr k
       , ppHie a
       , rest
@@ -112,9 +111,9 @@ validAst (Node _ span children) = do
           ]
     checkContainment [] = return ()
     checkContainment (x:xs)
-      | span `containsSpan` (nodeSpan x) = checkContainment xs
+      | span `containsSpan` nodeSpan x = checkContainment xs
       | otherwise = Left $ hsep
-          [ ppr $ span
+          [ ppr span
           , "does not contain"
           , ppr $ nodeSpan x
           ]
@@ -139,7 +138,7 @@ validateScopes asts = M.foldrWithKey (\k a b -> valid k a ++ b) [] refMap
               [] -> []
               _ -> if any (`scopeContainsSpan` sp) scopes
                    then []
-                   else return $ hsep $
+                   else return $ hsep
                      [ "Name", ppr n, "at position", ppr sp
                      , "doesn't occur in calculated scope", ppr scopes]
           | otherwise = []

hie-compat/src-ghc86/Compat/HieTypes.hs

@@ -5,7 +5,6 @@ For more information see https://gitlab.haskell.org/ghc/ghc/wikis/hie-files
 -}
 {-# LANGUAGE DeriveTraversable #-}
 {-# LANGUAGE DeriveDataTypeable #-}
-{-# LANGUAGE TypeSynonymInstances #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
@@ -168,7 +167,7 @@ data HieType a
 type HieTypeFlat = HieType TypeIndex
 
 -- | Roughly isomorphic to the original core 'Type'.
-newtype HieTypeFix = Roll (HieType (HieTypeFix))
+newtype HieTypeFix = Roll (HieType HieTypeFix)
 
 instance Binary (HieType TypeIndex) where
   put_ bh (HTyVarTy n) = do
@@ -200,7 +199,7 @@ instance Binary (HieType TypeIndex) where
   put_ bh (HCastTy a) = do
     putByte bh 7
     put_ bh a
-  put_ bh (HCoercionTy) = putByte bh 8
+  put_ bh HCoercionTy = putByte bh 8
 
   get bh = do
     (t :: Word8) <- get bh
@@ -228,7 +227,7 @@ instance Binary (HieArgs TypeIndex) where
 
 -- | Mapping from filepaths (represented using 'FastString') to the
 -- corresponding AST
-newtype HieASTs a = HieASTs { getAsts :: (M.Map FastString (HieAST a)) }
+newtype HieASTs a = HieASTs { getAsts :: M.Map FastString (HieAST a) }
   deriving (Functor, Foldable, Traversable)
 
 instance Binary (HieASTs TypeIndex) where
@@ -276,9 +275,9 @@ instance Binary (NodeInfo TypeIndex) where
     put_ bh $ nodeType ni
     put_ bh $ M.toList $ nodeIdentifiers ni
   get bh = NodeInfo
-    <$> fmap (S.fromDistinctAscList) (get bh)
+    <$> fmap S.fromDistinctAscList (get bh)
     <*> get bh
-    <*> fmap (M.fromList) (get bh)
+    <*> fmap M.fromList (get bh)
 
 type Identifier = Either ModuleName Name
 
@@ -309,7 +308,7 @@ instance Binary (IdentifierDetails TypeIndex) where
     put_ bh $ S.toAscList $ identInfo dets
   get bh =  IdentifierDetails
     <$> get bh
-    <*> fmap (S.fromDistinctAscList) (get bh)
+    <*> fmap S.fromDistinctAscList (get bh)
 
 
 -- | Different contexts under which identifiers exist
@@ -419,7 +418,7 @@ data IEType
 
 instance Binary IEType where
   put_ bh b = putByte bh (fromIntegral (fromEnum b))
-  get bh = do x <- getByte bh; pure $! (toEnum (fromIntegral x))
+  get bh = do x <- getByte bh; pure $! toEnum (fromIntegral x)
 
 
 data RecFieldContext
@@ -431,7 +430,7 @@ data RecFieldContext
 
 instance Binary RecFieldContext where
   put_ bh b = putByte bh (fromIntegral (fromEnum b))
-  get bh = do x <- getByte bh; pure $! (toEnum (fromIntegral x))
+  get bh = do x <- getByte bh; pure $! toEnum (fromIntegral x)
 
 
 data BindType
@@ -441,7 +440,7 @@ data BindType
 
 instance Binary BindType where
   put_ bh b = putByte bh (fromIntegral (fromEnum b))
-  get bh = do x <- getByte bh; pure $! (toEnum (fromIntegral x))
+  get bh = do x <- getByte bh; pure $! toEnum (fromIntegral x)
 
 
 data DeclType
@@ -456,7 +455,7 @@ data DeclType
 
 instance Binary DeclType where
   put_ bh b = putByte bh (fromIntegral (fromEnum b))
-  get bh = do x <- getByte bh; pure $! (toEnum (fromIntegral x))
+  get bh = do x <- getByte bh; pure $! toEnum (fromIntegral x)
 
 
 data Scope

hie-compat/src-ghc86/Compat/HieUtils.hs

@@ -62,11 +62,11 @@ resolveVisibility kind ty_args
         ts' = go (extendTvSubst env tv t) res ts
 
     go env (FunTy _ res) (t:ts) -- No type-class args in tycon apps
-      = (True,t) : (go env res ts)
+      = (True,t) : go env res ts
 
     go env (TyVarTy tv) ts
       | Just ki <- lookupTyVar env tv = go env ki ts
-    go env kind (t:ts) = (True, t) : (go env kind ts) -- Ill-kinded
+    go env kind (t:ts) = (True, t) : go env kind ts -- Ill-kinded
 
 foldType :: (HieType a -> a) -> HieTypeFix -> a
 foldType f (Roll t) = f $ fmap (foldType f) t
@@ -114,7 +114,7 @@ compressTypes
   -> (HieASTs TypeIndex, A.Array TypeIndex HieTypeFlat)
 compressTypes asts = (a, arr)
   where
-    (a, (HTS _ m i)) = flip runState initialHTS $
+    (a, HTS _ m i) = flip runState initialHTS $
       for asts $ \typ -> do
         i <- getTypeIndex typ
         return i

hls-plugin-api/src/Ide/Types.hs

@@ -1,5 +1,4 @@
 {-# LANGUAGE GADTs #-}
-{-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
 module Ide.Types

install/src/Cabal.hs

@@ -46,7 +46,7 @@ getGhcPathOfOrThrowError versionNumber =
 
 cabalInstallHls :: VersionNumber -> [String] -> Action ()
 cabalInstallHls versionNumber args = do
-  localBin <- liftIO $ getInstallDir
+  localBin <- liftIO getInstallDir
   cabalVersion <- getCabalVersion args
   ghcPath <- getGhcPathOfOrThrowError versionNumber
 

install/src/HlsInstall.hs

@@ -38,7 +38,7 @@ defaultMain = do
     let args = [verbosityArg (shakeVerbosity shakeOptionsRules)]
 
     phony "show-options" $ do
-      putNormal $ "Options:"
+      putNormal "Options:"
       putNormal $ "    Verbosity level: " ++ show (shakeVerbosity shakeOptionsRules)
 
     want ["short-help"]
@@ -51,7 +51,7 @@ defaultMain = do
     phony "data" $ do
       need ["show-options"]
       need ["check"]
-      liftIO $ putStrLn "Generation of hoogle data files is disabled for now."  
+      liftIO $ putStrLn "Generation of hoogle data files is disabled for now."
       -- if isRunFromStack then stackBuildData args else cabalBuildData args
 
     forM_
@@ -90,7 +90,7 @@ defaultMain = do
       need ["icu-macos-fix-build"]
 
     phony "icu-macos-fix-install" (command_ [] "brew" ["install", "icu4c"])
-    phony "icu-macos-fix-build" $ mapM_ (flip buildIcuMacosFix $ args) versions
+    phony "icu-macos-fix-build" $ mapM_ (flip buildIcuMacosFix args) versions
 
 
 buildIcuMacosFix :: VersionNumber -> [String] -> Action ()

plugins/default/src/Ide/Plugin/Example.hs

@@ -128,7 +128,7 @@ codeLens _lf ideState plId CodeLensParams{_textDocument=TextDocumentIdentifier u
           -- edit = WorkspaceEdit (Just $ Map.singleton uri $ List tedit) Nothing
           range = Range (Position 3 0) (Position 4 0)
         let cmdParams = AddTodoParams uri "do abc"
-        cmd <- mkLspCommand plId "codelens.todo" title (Just [(toJSON cmdParams)])
+        cmd <- mkLspCommand plId "codelens.todo" title (Just [toJSON cmdParams])
         pure $ Right $ List [ CodeLens range (Just cmd) Nothing ]
       Nothing -> pure $ Right $ List []
 

plugins/default/src/Ide/Plugin/Floskell.hs

@@ -1,8 +1,5 @@
-{-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE TypeApplications #-}
-{-# LANGUAGE ViewPatterns #-}
 
 module Ide.Plugin.Floskell
   (

plugins/default/src/Ide/Plugin/Fourmolu.hs

@@ -1,7 +1,7 @@
+{-# LANGUAGE DisambiguateRecordFields #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PackageImports #-}
-{-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE TypeApplications #-}
 
 module Ide.Plugin.Fourmolu (

plugins/default/src/Ide/Plugin/Ormolu.hs

@@ -1,6 +1,5 @@
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE PackageImports      #-}
-{-# LANGUAGE RecordWildCards     #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications    #-}
 

plugins/hls-eval-plugin/src/Ide/Plugin/Eval/CodeLens.hs

@@ -4,7 +4,6 @@
 {-# LANGUAGE ExtendedDefaultRules #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE FlexibleInstances #-}
-{-# LANGUAGE ImplicitParams #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RankNTypes #-}

plugins/hls-eval-plugin/src/Ide/Plugin/Eval/Parse/Option.hs

@@ -30,4 +30,4 @@ langOptions = runParser (many space *> languageOpts <* many space)
 -- >>> runParser languageOpts ":set -XBinaryLiterals -XOverloadedStrings"
 -- Right ["BinaryLiterals","OverloadedStrings"]
 languageOpts :: Parser Char [[Char]]
-languageOpts = string ":set" *> many (many space *> string "-X" *> (many letterChar))
+languageOpts = string ":set" *> many (many space *> string "-X" *> many letterChar)

plugins/hls-eval-plugin/src/Ide/Plugin/Eval/Util.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE ImplicitParams #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE NoMonomorphismRestriction #-}
 {-# OPTIONS_GHC -Wno-orphans #-}

plugins/hls-explicit-imports-plugin/src/Ide/Plugin/ExplicitImports.hs

@@ -3,13 +3,11 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE DerivingStrategies #-}
 {-# LANGUAGE DuplicateRecordFields #-}
-{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeFamilies #-}
-{-# LANGUAGE ViewPatterns #-}
 
 #include "ghc-api-version.h"
 
@@ -189,10 +187,10 @@ minimalImportsRule = define $ \MinimalImports nfp -> do
 
 -- | Use the ghc api to extract a minimal, explicit set of imports for this module
 extractMinimalImports ::
-  Maybe (HscEnvEq) ->
-  Maybe (TcModuleResult) ->
+  Maybe HscEnvEq ->
+  Maybe TcModuleResult ->
   IO ([LImportDecl GhcRn], Maybe [LImportDecl GhcRn])
-extractMinimalImports (Just (hsc)) (Just (TcModuleResult {..})) = do
+extractMinimalImports (Just hsc) (Just TcModuleResult {..}) = do
   -- extract the original imports and the typechecking environment
   let tcEnv = tmrTypechecked
       (_, imports, _, _) = tmrRenamed

plugins/hls-hlint-plugin/src/Ide/Plugin/Hlint.hs

@@ -7,10 +7,7 @@
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PackageImports    #-}
-{-# LANGUAGE RecordWildCards   #-}
-{-# LANGUAGE TupleSections     #-}
 {-# LANGUAGE TypeFamilies      #-}
-{-# LANGUAGE ViewPatterns      #-}
 
 module Ide.Plugin.Hlint
   (