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Merge pull request #25 from purescript/compiler/0.12
Updates for 0.12
2 parents 188eab3 + 2417fdf commit 4d6c8b0

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‎.gitignore‎

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/bower_components/
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/node_modules/
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/output/
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package-lock.json

‎LICENSE‎

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Copyright (c) 2014-15 PureScript
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Copyright 2018 PureScript
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

‎bower.json‎

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{
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"name": "purescript-parallel",
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"description": "Type classes for parallel computation",
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"license": "MIT",
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"license": "BSD-3-Clause",
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"repository": {
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"type": "git",
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"url": "git://github.com/purescript/purescript-parallel.git"
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"package.json"
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],
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"dependencies": {
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"purescript-transformers": "^3.0.0",
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"purescript-refs": "^3.0.0",
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"purescript-functors": "^2.0.0",
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"purescript-foldable-traversable": "^3.6.0"
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"purescript-control": "^4.0.0",
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"purescript-effect": "^2.0.0",
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"purescript-either": "^4.0.0",
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"purescript-foldable-traversable": "^4.0.0",
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"purescript-functors": "^3.0.0",
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"purescript-maybe": "^4.0.0",
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"purescript-newtype": "^3.0.0",
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"purescript-prelude": "^4.0.0",
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"purescript-refs": "^4.0.0",
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"purescript-transformers": "^4.0.0"
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},
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"devDependencies": {
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"purescript-console": "^3.0.0",
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"purescript-functions": "^3.0.0"
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"purescript-console": "^4.0.0",
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"purescript-functions": "^4.0.0"
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}
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}

‎package.json‎

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"test": "pulp test"
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},
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"devDependencies": {
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"pulp": "^10.0.4",
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"purescript-psa": "^0.5.0-rc.1",
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"rimraf": "^2.6.1"
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"pulp": "^12.2.0",
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"purescript-psa": "^0.6.0",
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"rimraf": "^2.6.2"
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}
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}

‎src/Control/Parallel.purs‎

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module Control.Parallel
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( parTraverse
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( parApply
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, parTraverse
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, parTraverse_
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, parSequence
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, parSequence_
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, parOneOf
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, parOneOfMap
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, parApply
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, module Control.Parallel.Class
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) where
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-> m b
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parApply mf ma = sequential(apply (parallel mf) (parallel ma))
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-- | Traverse a collection in parallel.
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parTraverse
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:: forall f m t a b
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=> Traversable t
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=> t (m a)
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-> m (t a)
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parSequence = parTraverse id
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parSequence = parTraverse identity
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parSequence_
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:: forall a t m f
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. Parallel f m
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=> Foldable t
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=> t (m a)
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-> m Unit
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parSequence_ = parTraverse_ id
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parSequence_ = parTraverse_ identity
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-- | Race a collection in parallel.
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parOneOf

‎src/Control/Parallel/Class.purs‎

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module Control.Parallel.Class
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( class Parallel
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, parallel
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, sequential
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, ParCont(..)
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) where
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module Control.Parallel.Class where
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import Prelude
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import Control.Alt (class Alt)
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import Control.Alternative (class Alternative)
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import Control.Monad.Cont.Trans (ContT(..), runContT)
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import Control.Monad.Eff (Eff)
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import Control.Monad.Eff.Class (class MonadEff, liftEff)
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import Control.Monad.Eff.Ref (REF, writeRef, readRef, newRef)
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import Control.Monad.Eff.Unsafe (unsafeCoerceEff)
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import Control.Monad.Except.Trans (ExceptT(..))
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import Control.Monad.Maybe.Trans (MaybeT(..))
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import Control.Monad.Reader.Trans (mapReaderT, ReaderT)
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import Control.Monad.Writer.Trans (mapWriterT, WriterT)
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import Control.Plus (class Plus)
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import Data.Either (Either)
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import Data.Functor.Compose (Compose(..))
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import Data.Maybe (Maybe(..))
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import Data.Monoid (class Monoid)
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import Data.Newtype (class Newtype)
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import Effect.Class (class MonadEffect, liftEffect)
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import Effect.Ref as Ref
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-- | The `Parallel` class abstracts over monads which support
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-- | parallel composition via some related `Applicative`.
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class (Monad m, Applicative f) <= Parallel f m | m -> f, f -> m where
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parallel :: m ~> f
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parallel :: m ~> f
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sequential :: f ~> m
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instance monadParExceptT :: Parallel f m => Parallel (Compose f (Either e)) (ExceptT e m) where
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derive instance newtypeParCont :: Newtype (ParCont m a) _
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instance functorParCont :: MonadEff eff m => Functor (ParCont m) where
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instance functorParCont :: MonadEffect m => Functor (ParCont m) where
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map f = parallel <<< map f <<< sequential
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instance applyParCont :: MonadEff eff m => Apply (ParCont m) where
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instance applyParCont :: MonadEffect m => Apply (ParCont m) where
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apply (ParCont ca) (ParCont cb) = ParCont $ ContT \k -> do
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ra <- liftEff $ unsafeWithRef (newRef Nothing)
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rb <- liftEff $ unsafeWithRef (newRef Nothing)
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ra <- liftEffect (Ref.new Nothing)
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rb <- liftEffect (Ref.new Nothing)
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runContT ca \a -> do
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mb <- liftEff $ unsafeWithRef (readRef rb)
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mb <- liftEffect (Ref.read rb)
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case mb of
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Nothing -> liftEff $ unsafeWithRef (writeRef ra (Just a))
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Nothing -> liftEffect (Ref.write (Just a) ra)
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Just b -> k (a b)
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runContT cb \b -> do
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ma <- liftEff $ unsafeWithRef (readRef ra)
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ma <- liftEffect (Ref.read ra)
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case ma of
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Nothing -> liftEff $ unsafeWithRef (writeRef rb (Just b))
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Nothing -> liftEffect (Ref.write (Just b) rb)
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Just a -> k (a b)
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90-
instance applicativeParCont :: MonadEff eff m => Applicative (ParCont m) where
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instance applicativeParCont :: MonadEffect m => Applicative (ParCont m) where
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pure = parallel <<< pure
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instance altParCont :: MonadEff eff m => Alt (ParCont m) where
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instance altParCont :: MonadEffect m => Alt (ParCont m) where
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alt (ParCont c1) (ParCont c2) = ParCont $ ContT \k -> do
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done <- liftEff $ unsafeWithRef (newRef false)
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done <- liftEffect (Ref.new false)
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runContT c1 \a -> do
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b <- liftEff $ unsafeWithRef (readRef done)
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b <- liftEffect (Ref.read done)
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if b
10091
then pure unit
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else do
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liftEff $ unsafeWithRef (writeRef done true)
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liftEffect (Ref.write true done)
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k a
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runContT c2 \a -> do
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b <- liftEff $ unsafeWithRef (readRef done)
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b <- liftEffect (Ref.read done)
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if b
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then pure unit
109100
else do
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liftEff $ unsafeWithRef (writeRef done true)
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liftEffect (Ref.write true done)
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k a
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instance plusParCont :: MonadEff eff m => Plus (ParCont m) where
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instance plusParCont :: MonadEffect m => Plus (ParCont m) where
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empty = ParCont $ ContT \_ -> pure unit
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instance alternativeParCont :: MonadEff eff m => Alternative (ParCont m)
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instance alternativeParCont :: MonadEffect m => Alternative (ParCont m)
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instance monadParParCont :: MonadEff eff m => Parallel (ParCont m) (ContT Unit m) where
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instance monadParParCont :: MonadEffect m => Parallel (ParCont m) (ContT Unit m) where
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parallel = ParCont
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sequential (ParCont ma) = ma
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unsafeWithRef :: forall eff a. Eff (ref :: REF | eff) a -> Eff eff a
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unsafeWithRef = unsafeCoerceEff

‎test/Main.purs‎

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module Test.Main where
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import Prelude (Unit, (<<<))
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import Prelude
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import Control.Monad.Cont.Trans (ContT(..), runContT)
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import Control.Monad.Eff (Eff, kind Effect)
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import Control.Monad.Eff.Console (CONSOLE, logShow)
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import Control.Parallel (parTraverse)
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import Effect (Effect)
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import Effect.Console (logShow)
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newtype Request = Request
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{ host :: String
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, path :: String
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}
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foreign import data HTTP :: Effect
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foreign import getImpl :: Request -> (String -> Effect Unit) -> Effect Unit
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foreign import getImpl
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:: forall eff
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. Request
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-> (String -> Eff (http :: HTTP | eff) Unit)
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-> Eff (http :: HTTP | eff) Unit
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get :: forall eff. Request -> ContT Unit (Eff (http :: HTTP | eff)) String
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get :: Request -> ContT Unit Effect String
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get req = ContT (getImpl req)
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request :: String -> Request
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request host = Request { host: host, path: "/" }
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29-
main :: forall eff. Eff (http :: HTTP, console :: CONSOLE | eff) Unit
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main :: Effect Unit
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main = runContT (parTraverse (get <<< request) resources) logShow
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where
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resources :: Array String

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