content: {-# LANGUAGE Safe #-}
  
  -- |
  --
  -- Module      :  Control.Monad.Fail
  -- Copyright   :  (C) 2015 David Luposchainsky,
  --                (C) 2015 Herbert Valerio Riedel
  -- License     :  BSD-style (see the file LICENSE)
  --
  -- Maintainer  :  libraries@haskell.org
  -- Stability   :  provisional
  -- Portability :  portable
  --
  -- Transitional module providing the 'MonadFail' class and primitive
  -- instances.
  --
  -- This module can be imported for defining forward compatible
  -- 'MonadFail' instances:
  --
  -- @
  -- import qualified Control.Monad.Fail as Fail
  --
  -- instance Monad Foo where
  --   (>>=) = {- ...bind impl... -}
  --
  --   -- Provide legacy 'fail' implementation for when
  --   -- new-style MonadFail desugaring is not enabled.
  --   fail = Fail.fail
  --
  -- instance Fail.MonadFail Foo where
  --   fail = {- ...fail implementation... -}
  -- @
  --
  -- See <https://gitlab.haskell.org/haskell/prime/-/wikis/libraries/proposals/monad-fail>
  -- for more details.
  --
  -- @since 4.9.0.0
  --
  
  module Control.Monad.Fail
      (MonadFail(fail)) where
  
  import GHC.Internal.Control.Monad.Fail
  