OneTuple-0.2.2.1/0000755000000000000000000000000007346545000011576 5ustar0000000000000000OneTuple-0.2.2.1/Changelog.md0000755000000000000000000000014207346545000014007 0ustar0000000000000000# next - Compatible with GHC-8.6 # 0.2.2 - Add `Semigroup` instances - Compatible with GHC-8.4 OneTuple-0.2.2.1/LICENSE0000644000000000000000000000274407346545000012612 0ustar0000000000000000 Copyright (c) 2008, John A. Dorsey. All rights reserved. Redistribution and use of this software 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 John Dorsey nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. OneTuple-0.2.2.1/OneTuple.cabal0000644000000000000000000000211207346545000014311 0ustar0000000000000000cabal-version: >=1.10 name: OneTuple version: 0.2.2.1 synopsis: Singleton Tuple category: Data description: This package provides a singleton tuple data type . > data OneTuple a = OneTuple a . Note: it's not a @newtype@ copyright: (c) John Dorsey 2008 license: BSD3 license-file: LICENSE author: John Dorsey maintainer: Oleg Grenrus , John Dorsey stability: experimental build-type: Simple tested-with: GHC ==7.0.4 || ==7.2.2 || ==7.4.2 || ==7.6.3 || ==7.8.4 || ==7.10.3 || ==8.0.2 || ==8.2.2 || ==8.4.4 || ==8.6.5 || ==8.8.3 || ==8.10.1 extra-source-files: Changelog.md source-repository head type: git location: https://github.com/phadej/OneTuple.git library default-language: Haskell98 exposed-modules: Data.Tuple.OneTuple hs-source-dirs: src build-depends: base >=4.3 && <4.15 if !impl(ghc >=8.0) build-depends: semigroups >=0.18.4 && <0.20 OneTuple-0.2.2.1/Setup.hs0000644000000000000000000000006107346545000013227 0ustar0000000000000000 import Distribution.Simple main = defaultMain OneTuple-0.2.2.1/src/Data/Tuple/0000755000000000000000000000000007346545000014327 5ustar0000000000000000OneTuple-0.2.2.1/src/Data/Tuple/OneTuple.hs0000644000000000000000000000503507346545000016421 0ustar0000000000000000-- |OneTuple fills the /tuple gap/ with a singleton tuple. -- -- OneTuple /does not support/ the usual parenthesized tuple syntax. -- -- OneTuple -- -- * has the expected laziness properties -- -- * can be pattern-matched -- -- * ships with instances for several standard type classes, -- including all those supported by H98-standard tuples -- -- * requires no language extensions, except for hierarchical modules module Data.Tuple.OneTuple (OneTuple(OneTuple), only) where import Control.Applicative (Applicative (..)) import Control.Monad (ap) import Control.Monad.Fix (MonadFix (..)) import Data.Foldable (Foldable (..)) import Data.Ix (Ix (..)) import Data.Monoid (Monoid (..)) import Data.Semigroup (Semigroup (..)) import Data.Traversable (Traversable (..)) -- |OneTuple is the singleton tuple data type. data OneTuple a = OneTuple a -- ^ singleton tuple constructor deriving (Eq,Ord,Bounded,Show,Read) -- |The 'only' function extracts the OneTuple's only member. -- (Compare to 'fst' and 'snd'.) only :: OneTuple a -- ^ takes a singleton tuple argument -> a -- ^ returns the only element in the tuple only (OneTuple x) = x instance (Enum a) => Enum (OneTuple a) where succ = fmap succ pred = fmap pred toEnum = pure . toEnum fromEnum (OneTuple x) = fromEnum x instance (Ix a) => Ix (OneTuple a) where range (OneTuple x, OneTuple y) = map OneTuple (range (x,y)) index (OneTuple x, OneTuple y) (OneTuple z) = index (x,y) z inRange (OneTuple x, OneTuple y) (OneTuple z) = inRange (x,y) z instance Foldable OneTuple where fold (OneTuple m) = m foldMap f (OneTuple x) = f x foldr f b (OneTuple x) = f x b foldl f a (OneTuple x) = f a x foldr1 _f (OneTuple x) = x foldl1 _f (OneTuple x) = x instance Traversable OneTuple where traverse f (OneTuple x) = fmap OneTuple (f x) sequenceA (OneTuple x) = fmap OneTuple x instance Functor OneTuple where fmap f (OneTuple x) = OneTuple (f x) instance Applicative OneTuple where pure = OneTuple OneTuple f <*> OneTuple x = OneTuple (f x) _ *> x = x x <* _ = x instance Monad OneTuple where return = pure (>>) = (*>) (OneTuple x) >>= f = f x instance (Semigroup a) => Semigroup (OneTuple a) where OneTuple x <> OneTuple y = OneTuple (x <> y) instance (Monoid a) => Monoid (OneTuple a) where mempty = OneTuple mempty mappend (OneTuple x) (OneTuple y) = OneTuple (mappend x y) instance MonadFix OneTuple where mfix f = let a = f (only a) in a