{-# LANGUAGE CPP #-} {-# OPTIONS_GHC -fno-warn-orphans #-} {- Copyright (C) 2012 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@] Implements 'Test.QuickCheck.Arbitrary' for 'Data.Array.IArray.Array', where the array-index is required to be a /bounded enumerable/ type. [@EXAMPLE@] @Test.QuickCheck.sample (Test.QuickCheck.arbitrary :: Test.QuickCheck.Gen.Gen (Data.Array.IArray.Array Data.Int.Int8 Int))@ -} module ToolShed.Test.QuickCheck.Arbitrary.ArrayElem() where import Control.Applicative((<$>)) import qualified Data.Array.IArray import qualified Test.QuickCheck instance (Bounded i, Data.Array.IArray.Ix i, Enum i, Test.QuickCheck.Arbitrary e) => Test.QuickCheck.Arbitrary (Data.Array.IArray.Array i e) where arbitrary = Data.Array.IArray.array bounds . zip [minBound .. maxBound] <$> Test.QuickCheck.vector (succ $ fromEnum (snd bounds) - fromEnum (fst bounds)) where bounds = (minBound, maxBound) #if !(MIN_VERSION_QuickCheck(2,1,0)) coarbitrary = undefined --CAVEAT: stops warnings from ghc. #endif