acquire (empty) → 0.1

raw patch · 5 files changed

+190/−0 lines, 5 filesdep +basesetup-changed

Dependencies added: base

Files

• LICENSE +22/−0
• Setup.hs +2/−0
• acquire.cabal +49/−0
• library/Acquire.hs +48/−0
• library/Acquire/Prelude.hs +69/−0

@@ -0,0 +1,22 @@+Copyright (c) 2013 Gabriel Gonzalez, 2018 Metrix.AI++Permission is hereby granted, free of charge, to any person+obtaining a copy of this software and associated documentation+files (the "Software"), to deal in the Software without+restriction, including without limitation the rights to use,+copy, modify, merge, publish, distribute, sublicense, and/or sell+copies of the Software, and to permit persons to whom the+Software is furnished to do so, subject to the following+conditions:++The above copyright notice and this permission notice shall be+included in all copies or substantial portions of the Software.++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR+OTHER DEALINGS IN THE SOFTWARE.

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

@@ -0,0 +1,49 @@+name:+  acquire+version:+  0.1+synopsis:+  Abstraction over management of resources+description:+  An implementation of the abstraction suggested in+  <http://www.haskellforall.com/2013/06/the-resource-applicative.html a blog-post by Gabriel Gonzalez>.+category:+  Resources+homepage:+  https://github.com/metrix-ai/acquire +bug-reports:+  https://github.com/metrix-ai/acquire/issues +author:+  Nikita Volkov <nikita.y.volkov@mail.ru>+maintainer:+  Metrix.AI Ninjas <ninjas@metrix.ai>+copyright:+  (c) 2013 Gabriel Gonzalez, 2018 Metrix.AI+license:+  MIT+license-file:+  LICENSE+build-type:+  Simple+cabal-version:+  >=1.10++source-repository head+  type:+    git+  location:+    git://github.com/metrix-ai/acquire.git++library+  hs-source-dirs:+    library+  default-extensions:+    Arrows, BangPatterns, ConstraintKinds, DataKinds, DefaultSignatures, DeriveDataTypeable, DeriveFoldable, DeriveFunctor, DeriveGeneric, DeriveTraversable, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, InstanceSigs, LambdaCase, LiberalTypeSynonyms, MagicHash, MultiParamTypeClasses, MultiWayIf, NoImplicitPrelude, NoMonomorphismRestriction, OverloadedStrings, PatternGuards, ParallelListComp, QuasiQuotes, RankNTypes, RecordWildCards, ScopedTypeVariables, StandaloneDeriving, TemplateHaskell, TupleSections, TypeFamilies, TypeOperators, UnboxedTuples+  default-language:+    Haskell2010+  exposed-modules:+    Acquire+  other-modules:+    Acquire.Prelude+  build-depends:+    base >=4.7 && <5

@@ -0,0 +1,48 @@+module Acquire+(+  Acquire(..),+  with,+)+where++import Acquire.Prelude+++{-|+Implementation of http://www.haskellforall.com/2013/06/the-resource-applicative.html+-}+newtype Acquire resource =+  Acquire (IO (resource, IO ()))++instance Functor Acquire where+  fmap f (Acquire io) =+    Acquire $ do+      (resource, release) <- io+      return (f resource, release)++instance Applicative Acquire where+  pure resource =+    Acquire (pure (resource, pure ()))+  Acquire io1 <*> Acquire io2 =+    Acquire $ do+      (f, release1) <- io1+      (x, release2) <- onException io2 release1+      return (f x, release2 >> release1)++instance Monad Acquire where+  return = pure+  (>>=) (Acquire io1) k2 =+    Acquire $ do+      (resource1, release1) <- io1+      (resource2, release2) <- case k2 resource1 of Acquire io2 -> onException io2 release1+      return (resource2, release2 >> release1)++instance MonadIO Acquire where+  liftIO io =+    Acquire (fmap (, return ()) io)++with :: Acquire resource -> (resource -> IO a) -> IO a+with (Acquire io) handle =+  do+    (resource, release) <- io+    finally (handle resource) release

@@ -0,0 +1,69 @@+module Acquire.Prelude+( +  module Exports,+)+where++-- base+-------------------------+import Control.Applicative as Exports+import Control.Arrow as Exports+import Control.Category as Exports+import Control.Concurrent as Exports+import Control.Exception as Exports+import Control.Monad as Exports hiding (mapM_, sequence_, forM_, msum, mapM, sequence, forM)+import Control.Monad.IO.Class as Exports+import Control.Monad.Fix as Exports hiding (fix)+import Control.Monad.ST as Exports+import Data.Bits as Exports+import Data.Bool as Exports+import Data.Char as Exports+import Data.Coerce as Exports+import Data.Complex as Exports+import Data.Data as Exports+import Data.Dynamic as Exports+import Data.Either as Exports+import Data.Fixed as Exports+import Data.Foldable as Exports+import Data.Function as Exports hiding (id, (.))+import Data.Functor as Exports+import Data.Int as Exports+import Data.IORef as Exports+import Data.Ix as Exports+import Data.List as Exports hiding (sortOn, isSubsequenceOf, uncons, concat, foldr, foldl1, maximum, minimum, product, sum, all, and, any, concatMap, elem, foldl, foldr1, notElem, or, find, maximumBy, minimumBy, mapAccumL, mapAccumR, foldl')+import Data.Maybe as Exports+import Data.Monoid as Exports+import Data.Ord as Exports+import Data.Proxy as Exports+import Data.Ratio as Exports+import Data.STRef as Exports+import Data.String as Exports+import Data.Traversable as Exports+import Data.Tuple as Exports+import Data.Unique as Exports+import Data.Version as Exports+import Data.Word as Exports+import Debug.Trace as Exports+import Foreign.ForeignPtr as Exports+import Foreign.Ptr as Exports+import Foreign.StablePtr as Exports+import Foreign.Storable as Exports+import GHC.Conc as Exports hiding (withMVar, threadWaitWriteSTM, threadWaitWrite, threadWaitReadSTM, threadWaitRead)+import GHC.Exts as Exports (lazy, inline, sortWith, groupWith)+import GHC.Generics as Exports (Generic)+import GHC.IO.Exception as Exports+import Numeric as Exports+import Prelude as Exports hiding (concat, foldr, mapM_, sequence_, foldl1, maximum, minimum, product, sum, all, and, any, concatMap, elem, foldl, foldr1, notElem, or, mapM, sequence, id, (.))+import System.Environment as Exports+import System.Exit as Exports+import System.IO as Exports (Handle, hClose)+import System.IO.Error as Exports+import System.IO.Unsafe as Exports+import System.Mem as Exports+import System.Mem.StableName as Exports+import System.Timeout as Exports+import Text.ParserCombinators.ReadP as Exports (ReadP, ReadS, readP_to_S, readS_to_P)+import Text.ParserCombinators.ReadPrec as Exports (ReadPrec, readPrec_to_P, readP_to_Prec, readPrec_to_S, readS_to_Prec)+import Text.Printf as Exports (printf, hPrintf)+import Text.Read as Exports (Read(..), readMaybe, readEither)+import Unsafe.Coerce as Exports