cln: hlint: Remove Either and Bifunctor related warnings.

.hlint.yaml

@@ -43,9 +43,6 @@
 - ignore: {name: "Fuse concatMap/map"}
 - ignore: {name: "Redundant where"}
 - ignore: {name: "Use concatMap"}
-- ignore: {name: "Use second"}
-- ignore: {name: "Use fromRight"}
-- ignore: {name: "Use fromLeft"}
 - ignore: {name: "Redundant bang pattern"}
 - ignore: {name: "Use zipWith"}
 - ignore: {name: "Replace case with maybe"}

hledger-lib/Hledger/Reports/ReportOptions.hs

@@ -59,6 +59,7 @@ where
 
 import Control.Applicative (Const(..), (<|>))
 import Control.Monad ((<=<), join)
+import Data.Either (fromRight)
 import Data.Either.Extra (eitherToMaybe)
 import Data.Functor.Identity (Identity(..))
 import Data.List.Extra (nubSort)
@@ -699,7 +700,7 @@ instance Reportable (Const r) e where
     report _ (Const x) = Const x
 
 instance Reportable Identity e where
-    report a (Identity i) = Identity $ either (const a) id i
+    report a (Identity i) = Identity $ fromRight a i
 
 instance Reportable Maybe e where
     report _ = join . fmap eitherToMaybe

hledger-ui/Hledger/UI/UIState.hs

@@ -8,6 +8,7 @@ where
 
 import Brick.Widgets.Edit
 import Data.Foldable (asum)
+import Data.Either (fromRight)
 import Data.List ((\\), foldl', sort)
 import Data.Semigroup (Max(..))
 import qualified Data.Text as T
@@ -246,7 +247,7 @@ setFilter :: String -> UIState -> UIState
 setFilter s ui@UIState{aopts=uopts@UIOpts{cliopts_=copts@CliOpts{reportspec_=rspec}}} =
     ui{aopts=uopts{cliopts_=copts{reportspec_=update rspec}}}
   where
-    update = either (const rspec) id . updateReportSpecWith (\ropts -> ropts{querystring_=querystring})  -- XXX silently ignores an error
+    update = fromRight rspec . updateReportSpecWith (\ropts -> ropts{querystring_=querystring})  -- XXX silently ignores an error
     querystring = words'' prefixes $ T.pack s
 
 -- | Reset some filters & toggles.

hledger-ui/Hledger/UI/UIUtils.hs

@@ -35,6 +35,7 @@ import Brick.Widgets.Dialog
 import Brick.Widgets.Edit
 import Brick.Widgets.List (List, listSelectedL, listNameL, listItemHeightL)
 import Control.Monad.IO.Class
+import Data.Bifunctor (second)
 import Data.List
 import qualified Data.Text as T
 import Data.Time (Day, addDays)
@@ -192,7 +193,7 @@ borderPeriodStr _           PeriodAll = str ""
 borderPeriodStr preposition p         = str (" "++preposition++" ") <+> withAttr ("border" <> "query") (str . T.unpack $ showPeriod p)
 
 borderKeysStr :: [(String,String)] -> Widget Name
-borderKeysStr = borderKeysStr' . map (\(a,b) -> (a, str b))
+borderKeysStr = borderKeysStr' . map (second str)
 
 borderKeysStr' :: [(String,Widget Name)] -> Widget Name
 borderKeysStr' keydescs =

hledger/Hledger/Cli/Commands/Roi.hs

@@ -17,6 +17,8 @@ import Control.Monad
 import System.Exit
 import Data.Time.Calendar
 import Text.Printf
+import Data.Bifunctor (second)
+import Data.Either (fromLeft, fromRight)
 import Data.Function (on)
 import Data.List
 import Numeric.RootFinding
@@ -172,7 +174,7 @@ timeWeightedReturn showCashFlow prettyTables investmentsQuery trans mixedAmountV
         $ map (\date_cash -> let (dates, cash) = unzip date_cash in (head dates, Right (maSum cash)))
         $ groupBy ((==) `on` fst)
         $ sortOn fst
-        $ map (\(d,a) -> (d, maNegate a))
+        $ map (second maNegate)
         $ cashFlow
 
   let units =
@@ -205,8 +207,8 @@ timeWeightedReturn showCashFlow prettyTables investmentsQuery trans mixedAmountV
   when showCashFlow $ do
     printf "\nTWR cash flow for %s - %s\n" (showDate spanBegin) (showDate (addDays (-1) spanEnd))
     let (dates', amounts) = unzip changes
-        cashflows' = map (either (const nullmixedamt) id) amounts
+        cashflows' = map (fromRight nullmixedamt) amounts
-        pnls = map (either id (const nullmixedamt)) amounts
+        pnls = map (fromLeft nullmixedamt) amounts
         (valuesOnDate,unitsBoughtOrSold', unitPrices', unitBalances') = unzip4 units
         add x lst = if valueBefore/=0 then x:lst else lst
         dates = add spanBegin dates'