-- Initial interruptible.cabal generated by cabal init.  For further 
-- documentation, see http://haskell.org/cabal/users-guide/

name:                interruptible
version:             0.1.2.0
synopsis:            Monad transformers that can be run and resumed later, conserving their context.
description:
    This package provides the functionality needed to intercalate the execution of different
    transformers, and passing their state around as values for resuming later. Further
    explanations for where to use it is available at the sealgram blog:
    <https://sealgram.com/blog/interruptible-monad-transformers.html>. The following is about
    how to use the package:
    .
    Given an inner monad @M@ and a transformer @T@, if T is an interruptible transformer,
    it becomes possible to intercalate functions over its context with functions over the
    inner monad. That is, code like this:
    .
    > runT (f 1 >>= g)
    > where
    >     f :: Int -> T M a
    >     g :: a -> T M b
    .
    Can be broken up like this:
    .
    > do
    >     let c0 = inTCtx 1
    >     resume f c0 >>=
    >     resume g
    .
    That makes it possible to intercalate the execution of different contexts, and
    treat contexts like data, for iterating or returning them.
    .
    As shown on the example, interruptible transformers are resumed with the @resume@ function.
    State may be managed by specialized functions usually named as @inTransfomerCtx@ and
    @peelTransformerCtx@ that enclose a value in an initial context and retrieve the
    value from a context.
    .
    Interruptible transformers can be stacked. On this case, they must be resumed with a
    composition of @resume@ calls, and their contexts must be created and peeled on the inverse
    order that they appear on the stack. Like:
    .
    > do
    >     let c0 = inT2Ctx . inT1Ctx $ 1
    >     (resume . resume) f c0 >>=
    >     (resume . resume) g
    > where
    >     f :: Monad m => Int -> T1 T2 M a
    >     g :: Monad m => a -> T1 T2 M b
    .
    For convenience, the @Interruptible@ module exports the @resume2@ to @resume5@
    functions as composotions of resume. They can be composed further as in
    @resume7 = resume3 . resume4@ if necessary.
    .
    This package also contains the appliable instantiations of Interruptible for the mtl transformers,
    the @intercalateWith@ function, that intercalates calls of a function through a list
    of contexts and parameters, and the @SafeIO@ module that lifts IOException treatment from the
    base monad into the current resumed context.
homepage:            https://sealgram.com/git/haskell/interruptible/
license:             BSD3
license-file:        LICENSE
author:              Marcos Dumay de Medeiros
maintainer:          marcos@marcosdumay.com
--copyright:           
category:            Control
build-type:          Simple
-- extra-source-files:  
cabal-version:       >=1.10

source-repository head
  type:     git
  location: https://sealgram.com/git/haskell/interruptible/
  branch:   master

source-repository this
  type:     git
  location: https://sealgram.com/git/haskell/interruptible/
  tag:   0.1.1.1


library
  exposed-modules:
      Control.Monad.Trans.Interruptible
      Control.Monad.Trans.SafeIO
  other-modules:       Control.Monad.Trans.Interruptible.Class
  other-extensions:    TypeFamilies
  build-depends:
      base >=4.7 && <5,
      transformers,
      monad-control,
      lifted-base,
      either
  hs-source-dirs:      src
  default-language:    Haskell2010

Test-suite all
  type: detailed-0.9
  test-module: Test
  hs-source-dirs:
    test
  build-depends:
    base >=4.7 && <5.0,
    Cabal >= 1.9.2,
    either,
    transformers,
    interruptible
  ghc-options: -Wall -fno-warn-unused-do-bind -fwarn-incomplete-patterns -threaded
  default-language: Haskell2010