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Pure specification of the IO monad

This package provides a library for the Haskell programming language. See for more information on Haskell.

It consists of several modules, that give a pure specification of functions in the IO monad:

Test.IOSpec.Fork: a pure specification of forkIO.

Test.IOSpec.IORef: a pure specification of most functions that create and manipulate on IORefs.

Test.IOSpec.MVar: a pure specification of most functions that create and manipulate and MVars.

Test.IOSpec.STM: a pure specification of atomically and the STM monad.

Test.IOSpec.Teletype: a pure specification of getChar, putChar, and several related Prelude functions.

Besides these modules containing the specifications, there are a few other important modules:

Test.IOSpec.Types: defines the IOSpec type and several amenities.

Test.IOSpec.VirtualMachine: defines a virtual machine on which to execute pure specifications.

Test.IOSpec.Surrogate: a drop-in replacement for the other modules. Import this and recompile your code once you've finished testing and debugging.

There are several well-documented examples included with the source distribution.

Package version:0.2.5-1+b2


IOSpec version 0.2
  Author: Wouter Swierstra <>

IOSpec provides a library containing pure, executable specifications
of a few functions from the IO monad. 

Build instructions:

    $ runhaskell Setup.lhs configure
    $ runhaskell Setup.lhs build
    $ runhaskell Setup.lhs install

for more instructions.



haskell-iospec (0.2.5-1+b2) sid; urgency=low

  * Binary-only non-maintainer upload for mipsel; no source changes.
  * Rebuild against new transformers/mtl

 -- mipsel Build Daemon (eysler) <>  Sat, 26 May 2012 04:12:10 +0000

haskell-iospec (0.2.5-1) unstable; urgency=low

  * New upstream release

 -- Iain Lane <>  Thu, 23 Feb 2012 19:50:22 +


This package was debianized by Clint Adams <> on
Fri, 17 Jun 2011 23:12:58 -0000

It was downloaded from

Upstream Authors:

    Wouter Swierstra <>


    2006 Wouter Swierstra


Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following co

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