reactive-banana

by HeinrichApfelmus

HeinrichApfelmus /reactive-banana

Library for functional reactive programming in Haskell.

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Reactive-banana

What's this?

Reactive-banana is a library for Functional Reactive Programming (FRP), written in Haskell.

See the project homepage for documentation, examples and so on.

Installation

Compilation from the repository

To build and install the core library from the source repository, simply type

cd reactive-banana && cabal install && cd ..

However, to try out the GUI examples, you have to install one of the of the additional packages.

GUI examples using wxHaskell

Prerequisites: the wxHaskell package

cabal install wx

Note that you need to have a development version of the wxWidgets libraries installed before building wx. If you run into

ExitFailure 1
exceptions, please follow the wxHaskell Quick Start instructions and try again.

To build the wx examples, type

cd reactive-banana-wx
cabal configure -fbuildExamples && cabal build
cd ..

Technical overview

How is the source code structured?

The project contains several directories:

  • reactive-banana
    — the core library
  • reactive-banana-wx
    — bindings to the wxHaskell GUI library, includes many examples

The reactive-banana library actually contains two FRP implementations:

  1. Reactive.Banana.Model - A model implementation for testing and understanding the semantics. You are encouraged to look at the source code.
  2. Reactive.Banana.Prim - The efficient push-driven implementation used for production code. Contains hard to understand trade secrets. ;-)

License

The source code is distributed under a BSD3 license. See the

LICENSE
files in the corresponding subdirectories.

The reactive-banana mascot [png] is licensed under a Creative Commons Attribution 4.0 International License with attribution to Heinrich Apfelmus and the reactive-banana library.

Contributors

Many thanks to everyone who contributed, provided feedback or simply wrote an application using Reactive-Banana! In particular, many thanks to:

Alexander Berntsen, Oliver Charles, Samuel Gélineau, Vladimir Lopatin, Atze van der Ploeg, and many others.

Special thanks to Oliver Charles for co-maintaining this project.

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