Functional reactive programming library https://github.com/esoeylemez/wires

Latest on Hackage:0.2.1

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

BSD3 licensed and maintained by Ertugrul Söylemez


This is a functional reactive programming library for interactive applications with the following features:

  • heavy focus on real-time applications like games and simulations,

  • very small core abstraction,

  • efficient in both time and space.

Until a proper tutorial has been written, please check out the examples directory. If you have questions, join #haskell-game on irc.freenode.net. If you would like to report a bug or request a feature, please file an issue.

Module overview

The library is split into two roles: applications and controllers. An application developer models interactions and implements reactive systems, i.e. the application logic. A controller developer implements the glue between the application and the real world, i.e. how events and time-varying values map to actual things on the screen or in the network. The module structure reflects that distinction:

  • Control.Wire: Application language (basically core + utils)
  • Control.Wire.Controller: Controller language
  • Control.Wire.Core: Core application language
  • Control.Wire.Internal: You should never need this module
  • Control.Wire.Utils: Extra application utilities

Modules not listed here are highly experimental and should not be used.

If you are asking yourself whether you are an application or a controller developer: at this early stage of development you are probably both, which means that you will write the application as well as connect its inputs and outputs to the real world.



  • Fix: bumped version bounds

  • Fix: more strictness fixes

  • Fix: README.md formatting for Hackage

  • Add: Semigroup and generalised Monoid instances for Event



  • Breaking change: Safer API for manage and manage'

  • Fix: wire strictness; strict value recursion like the following works now:

    rec x <- scan x0 -< x `seq` ev
  • Change: tighter version bounds

  • Add: event functions splitE, unalignE, unlessE

  • Add: wire transforms asksW, askW, hoistW, runReaderW



  • Initial version.
Depends on 6 packages:
Used by 1 package:
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