either-both (empty) → 0.1.0.0

raw patch · 5 files changed

+131/−0 lines, 5 filesdep +basesetup-changed

Dependencies added: base

Files

Data/Either/Both.hs +60/−0
LICENSE +30/−0
README.md +1/−0
Setup.hs +2/−0
either-both.cabal +38/−0

+ Data/Either/Both.hs view

@@ -0,0 +1,60 @@+module Data.Either.Both where++import Data.Bifoldable (Bifoldable (..))+import Data.Bifunctor (Bifunctor (..))+import Data.Bitraversable (Bitraversable (..))+import Data.Functor.Classes++data Either' a b = JustLeft a | JustRight b | Both a b+  deriving (Read, Show)++instance Bifunctor Either' where+    bimap f g = \ case JustLeft a -> JustLeft (f a)+                       JustRight b -> JustRight (g b)+                       Both a b -> Both (f a) (g b)++instance Bifoldable Either' where+    bifoldMap f g = \ case JustLeft a -> f a+                           JustRight b -> g b+                           Both a b -> f a <> g b++instance Bitraversable Either' where+    bitraverse f g = \ case JustLeft a -> JustLeft <$> f a+                            JustRight b -> JustRight <$> g b+                            Both a b -> Both <$> f a <*> g b++instance Eq2 Either' where+    liftEq2 f g x y = case (toMaybes x, toMaybes y) of+        ((am₁, bm₁), (am₂, bm₂)) -> liftEq f am₁ am₂ && liftEq g bm₁ bm₂++instance Ord2 Either' where+    liftCompare2 f g x y = case (toMaybes x, toMaybes y) of+        ((am₁, bm₁), (am₂, bm₂)) -> liftCompare f am₁ am₂ <> liftCompare g bm₁ bm₂++instance (Eq a, Eq b) => Eq (Either' a b) where (==) = eq2+instance (Ord a, Ord b) => Ord (Either' a b) where compare = compare2++instance (Semigroup a, Semigroup b) => Semigroup (Either' a b) where+    JustLeft  a₁ <> JustLeft  a₂ = JustLeft  (a₁ <> a₂)+    JustRight b₁ <> JustRight b₂ = JustRight (b₁ <> b₂)+    JustLeft  a₁ <> JustRight b₁ = Both a₁ b₁+    JustRight b₁ <> JustLeft  a₁ = Both a₁ b₁+    JustLeft  a₁ <> Both a₂ b₂   = Both (a₁ <> a₂) b₂+    JustRight b₁ <> Both a₂ b₂   = Both a₂ (b₁ <> b₂)+    Both a₁ b₁   <> JustLeft  a₂ = Both (a₁ <> a₂) b₁+    Both a₁ b₁   <> JustRight b₂ = Both a₁ (b₁ <> b₂)+    Both a₁ b₁   <> Both a₂ b₂   = Both (a₁ <> a₂) (b₁ <> b₂)++instance (Monoid a, Monoid b) => Monoid (Either' a b) where+    mempty = Both mempty mempty++fromMaybes :: Maybe a -> Maybe b -> Maybe (Either' a b)+fromMaybes Nothing Nothing = Nothing+fromMaybes (Just a) Nothing = Just (JustLeft a)+fromMaybes Nothing (Just b) = Just (JustRight b)+fromMaybes (Just a) (Just b) = Just (Both a b)++toMaybes :: Either' a b -> (Maybe a, Maybe b)+toMaybes (JustLeft a) = (Just a, Nothing)+toMaybes (JustRight b) = (Nothing, Just b)+toMaybes (Both a b) = (Just a, Just b)

+ LICENSE view

@@ -0,0 +1,30 @@+Copyright M Farkas-Dyck © 2018++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 M Farkas-Dyck nor the names of other+      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.

+ README.md view

@@ -0,0 +1,1 @@+# either-prime

+ Setup.hs view

@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain

+ either-both.cabal view

@@ -0,0 +1,38 @@+name:                either-both+version:             0.1.0.0+synopsis:            Either or both+-- description:+license:             BSD3+license-file:        LICENSE+author:              M Farkas-Dyck+maintainer:          strake888@gmail.com+copyright:           2018 M Farkas-Dyck+category:            Data+build-type:          Simple+extra-source-files:  README.md+cabal-version:       >=1.10++library+  hs-source-dirs:      .+  exposed-modules:     Data.Either.Both+  build-depends:       base >= 4.7 && < 5+  default-language:    Haskell2010+  default-extensions:  UnicodeSyntax+                     , LambdaCase+                     , InstanceSigs+                     , PartialTypeSignatures+                     , PolyKinds+                     , ConstraintKinds+                     , FlexibleContexts+                     , FlexibleInstances+                     , StandaloneDeriving+                     , DeriveFunctor+                     , DeriveFoldable+                     , DeriveTraversable+                     , OverloadedStrings+  ghc-options:         -Wall -Wcompat -Wredundant-constraints -Wno-name-shadowing+                       -Wincomplete-record-updates -Wincomplete-uni-patterns++source-repository head+  type:     git+  location: https://github.com/strake/either-both.hs