Copyright	(c) 2007 Andrea Rossato, David Roundy
License	BSD-style (see xmonad/LICENSE)
Maintainer	andrea.rossato@unibz.it
Stability	unstable
Portability	unportable
Safe Haskell	None
Language	Haskell98

XMonad.Util.Invisible

Contents

Usage:

Description

A data type to store the layout state

Synopsis

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 Source

Constructors

I (m a)

Instances

Monad m => Monad (Invisible m) Source
Functor m => Functor (Invisible m) Source
Applicative m => Applicative (Invisible m) Source
(Functor m, Monad m) => Read (Invisible m a) Source
Monad m => Show (Invisible m a) Source

whenIJust :: Monad m => Invisible Maybe a -> (a -> m ()) -> m () Source

fromIMaybe :: a -> Invisible Maybe a -> a Source