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Diffstat (limited to 'src/Wetterhorn/StackSet.hs')
| -rw-r--r-- | src/Wetterhorn/StackSet.hs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/Wetterhorn/StackSet.hs b/src/Wetterhorn/StackSet.hs index 22005a4..86d1b8e 100644 --- a/src/Wetterhorn/StackSet.hs +++ b/src/Wetterhorn/StackSet.hs @@ -1,8 +1,11 @@ module Wetterhorn.StackSet where +import Control.Monad (void) +import Data.Monoid (First(..)) import Control.Monad.Identity -import Control.Monad.Writer (First (..), MonadWriter (tell), execWriter) +import Control.Monad.Writer (MonadWriter (tell), execWriter) import Data.Maybe (isJust, mapMaybe) +import Data.Maybe (isJust) -- | The root datastructure for holding the state of the windows. data StackSet s sd t l a = StackSet |