{- Copyright (C) 2011-2015 Dr. Alistair Ward This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. -} {- | [@AUTHOR@] Dr. Alistair Ward [@DESCRIPTION@] Defines a standard interface to which various options-related data can conform. -} module ToolShed.Options( -- * Type-classes Options(..) ) where import qualified Data.Default -- | The required interface. class Data.Default.Default a => Options a where blankValue :: a -- ^ The /undefined/ state of the data-type, which may be literal, but could alternatively be a logical starting value.