-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | A 'Failable' error monad class to unify failure across monads that can fail
--   
--   Please see the README on GitHub at
--   <a>https://github.com/githubuser/failable#readme</a>
@package failable
@version 0.1.0.1


-- | This library provides a <a>Failable</a> error monad class to unify
--   errors across monads and transformers most commonly used to implement
--   pipelines that can fail.
module Control.Monad.Failable

-- | The <a>Failable</a> class. A Monad which is an instance of this class
--   can be used as a context in a function running in one with this class
--   constraint, in order to report error conditions
class (Monad m) => Failable m

-- | trigger a failure. It takes an exception value as argument and it
--   returns whatever might be used to abort a monadic computation in the
--   monad instantiating this class.
failure :: (Failable m, Exception e) => e -> m a
instance Control.Monad.Failable.Failable GHC.Types.IO
instance Control.Monad.Failable.Failable []
instance Control.Monad.Failable.Failable GHC.Maybe.Maybe
instance (e Data.Type.Equality.~ GHC.Exception.Type.SomeException) => Control.Monad.Failable.Failable (Data.Either.Either e)
instance GHC.Base.Monad m => Control.Monad.Failable.Failable (Control.Monad.Trans.Maybe.MaybeT m)
instance (GHC.Base.Monad m, e Data.Type.Equality.~ GHC.Exception.Type.SomeException) => Control.Monad.Failable.Failable (Control.Monad.Trans.Except.ExceptT e m)