{- Copyright (c) 2013 Lukas Mai All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the author nor the names of his contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY LUKAS MAI AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -} module Data.Default.Instances.Containers ( -- | This module defines 'Default' instances for the types 'S.Set', 'M.Map', -- 'IntMap', 'IntSet', 'Seq', and 'Tree'. ) where import Data.Default.Class import Data.Monoid (mempty) import qualified Data.Set as S import qualified Data.Map as M import Data.IntMap (IntMap) import Data.IntSet (IntSet) import Data.Sequence (Seq) import Data.Tree (Tree(..)) instance Default (S.Set v) where def = S.empty instance Default (M.Map k v) where def = M.empty instance Default (IntMap v) where def = mempty instance Default IntSet where def = mempty instance Default (Seq a) where def = mempty instance (Default a) => Default (Tree a) where def = Node def []