[commit: packages/haskeline] master: Add MonadExcept IdentityT instance (cfaeafa)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/haskeline

On branch  : master
Link       : http://git.haskell.org/packages/haskeline.git/commitdiff/cfaeafae9d4a2bf957d2a683a69a95bfc146f2fc

>---------------------------------------------------------------

commit cfaeafae9d4a2bf957d2a683a69a95bfc146f2fc
Author: Vladislav Zavialov <vlad.z.4096 at gmail.com>
Date:   Mon Apr 3 17:38:50 2017 +0300

    Add MonadExcept IdentityT instance


>---------------------------------------------------------------

cfaeafae9d4a2bf957d2a683a69a95bfc146f2fc
 System/Console/Haskeline/MonadException.hs | 3 ++-
 haskeline.cabal                            | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/System/Console/Haskeline/MonadException.hs b/System/Console/Haskeline/MonadException.hs
index 372557d..b796bf0 100644
--- a/System/Console/Haskeline/MonadException.hs
+++ b/System/Console/Haskeline/MonadException.hs
@@ -33,6 +33,7 @@ import Prelude hiding (catch)
 #endif
 import Control.Monad(liftM, join)
 import Control.Monad.IO.Class
+import Control.Monad.Trans.Identity
 import Control.Monad.Trans.Reader
 import Control.Monad.Trans.State.Strict
 import Control.Monad.Trans.Error
@@ -179,4 +180,4 @@ instance (Monoid w, MonadException m) => MonadException (RWST r w s m) where
                                     . run . (\m -> runRWST m r s))
                     in fmap (\m -> runRWST m r s) $ f run'
 
-
+deriving instance MonadException m => MonadException (IdentityT m)
diff --git a/haskeline.cabal b/haskeline.cabal
index 11d280c..ace63ec 100644
--- a/haskeline.cabal
+++ b/haskeline.cabal
@@ -52,6 +52,7 @@ Library
                 TypeSynonymInstances
                 FlexibleContexts, ExistentialQuantification
                 ScopedTypeVariables, GeneralizedNewtypeDeriving
+                StandaloneDeriving
                 MultiParamTypeClasses, OverlappingInstances
                 UndecidableInstances
                 ScopedTypeVariables, CPP, DeriveDataTypeable,