casa-reoc-0.1.0.0: src/ReOC/Name/NoHistory.hs

{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -Wall #-}

-- | The name @noHistory@, which targets @()@. It names a field or constructor of @HistoryAnswer'@.
module ReOC.Name.NoHistory (
  NoHistoryLike (..),
) where

import Control.Lens (Optic)

class NoHistoryLike p f x x' where
  noHistory ::
    Optic p f x x' () ()

-- | Identity
instance (x' ~ ()) => NoHistoryLike p f () x' where
  noHistory = id