{- Copyright (C) 2010 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@] Miscellaneous operations on Pairs. -} module ToolShed.Data.Pair( -- * Functions mirror ) where import Control.Arrow((***)) {- | * Apply the same transformation to both halves of a /Pair/. * CAVEAT: the pair is required to have identical types. -} mirror :: (a -> b) -> (a, a) -> (b, b) mirror f = f *** f