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| author | Adam Vogt <vogt.adam@gmail.com> | 2014-07-10 18:39:50 +0200 |
|---|---|---|
| committer | Adam Vogt <vogt.adam@gmail.com> | 2014-07-10 18:39:50 +0200 |
| commit | 7de2796a2448a33ef4ed80111681bd6175f57477 (patch) | |
| tree | 08a190bd0c09c83039cf606ad4c6b67a88cea6cc /XMonad/Util/Invisible.hs | |
| parent | 61e3488be86e7b11916bf23b4a0bc3826570e5df (diff) | |
| download | XMonadContrib-7de2796a2448a33ef4ed80111681bd6175f57477.tar.gz XMonadContrib-7de2796a2448a33ef4ed80111681bd6175f57477.tar.xz XMonadContrib-7de2796a2448a33ef4ed80111681bd6175f57477.zip | |
derive Applicative instances to suppress AMP warning
Ignore-this: c2110d07bccc61462c3fbf73c900aaa1
darcs-hash:20140710163950-1499c-ee7151d0314d7c5f154782c2099a02377311aaf3.gz
Diffstat (limited to 'XMonad/Util/Invisible.hs')
| -rw-r--r-- | XMonad/Util/Invisible.hs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/XMonad/Util/Invisible.hs b/XMonad/Util/Invisible.hs index fc18180..2fa8b2b 100644 --- a/XMonad/Util/Invisible.hs +++ b/XMonad/Util/Invisible.hs @@ -22,13 +22,15 @@ module XMonad.Util.Invisible ( , fromIMaybe ) where +import Control.Applicative + -- $usage -- A wrapper data type to store layout state that shouldn't be persisted across -- restarts. A common wrapped type to use is @Maybe a@. -- Invisible derives trivial definitions for Read and Show, so the wrapped data -- type need not do so. -newtype Invisible m a = I (m a) deriving (Monad, Functor) +newtype Invisible m a = I (m a) deriving (Monad, Applicative, Functor) instance (Functor m, Monad m) => Read (Invisible m a) where readsPrec _ s = [(fail "Read Invisible", s)] |