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Created April 24, 2021 19:49
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Lens Template Haskell data fields with suffix
import Control.Lens.Internal.FieldTH (makeFieldOptics, LensRules(..))
import Language.Haskell.TH.Syntax (mkName, nameBase)
import Control.Lens.TH (DefName(..), lensRules)
data Field = { a :: Int, b :: Int }
makeFieldOptics lensRules { _fieldToDef = (\_ _ -> (:[]) . TopName . mkName . (++ "L") . nameBase) } ''Field
-- hopefully someone find this useful
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siers commented Apr 24, 2021

Oh, now that I've implemented it myself, I see someone else implemented it as well... 😅

https://hackage.haskell.org/package/brick-0.61/docs/src/Brick.Types.TH.html

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