# The bound package

We represent the target language itself as an ideal monad supplied by the
user, and provide a `Scope`

monad transformer for introducing bound variables
in user supplied terms. Users supply a `Monad`

and `Traversable`

instance,
and we traverse to find free variables, and use the Monad to perform
substitution that avoids bound variables.

Slides describing and motivating this approach to name binding are available online at:

http://www.slideshare.net/ekmett/bound-making-de-bruijn-succ-less

The goal of this package is to make it as easy as possible to deal with name binding without forcing an awkward monadic style on the user.

With generalized de Bruijn term you can `lift`

whole trees instead of just
applying `succ`

to individual variables, weakening the all variables bound
by a scope and greatly speeding up instantiation. By giving binders more
structure we permit easy simultaneous substitution and further speed up
instantiation.

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## Properties

Versions | 0.1, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.2, 0.2.1, 0.3.1, 0.3.2, 0.4, 0.5, 0.5.0.1, 0.5.0.2, 0.5.1, 0.6, 0.6.1, 0.7, 0.8, 0.8.1, 0.9, 0.9.0.1, 0.9.1, 0.9.1.1, 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 2, 2.0.1 |
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Change log | CHANGELOG.markdown |

Dependencies | base (==4.*), bifunctors (==3.*), binary (>=0.5 && <0.8), bytes (>=0.4 && <1), cereal (>=0.3.5.2 && <0.5), comonad (>=3 && <5), ghc-prim, hashable (>=1.1 && <1.3), hashable-extras (>=0.1 && <1), prelude-extras (>=0.3 && <1), profunctors (>=3.3 && <5), transformers (>=0.2 && <0.4) [details] |

License | BSD3 |

Copyright | Copyright (C) 2012-2013 Edward A. Kmett |

Author | Edward A. Kmett |

Maintainer | Edward A. Kmett <ekmett@gmail.com> |

Category | Language, Compilers/Interpreters |

Home page | http://github.com/ekmett/bound/ |

Bug tracker | http://github.com/ekmett/bound/issues |

Source repository | head: git clone git://github.com/ekmett/bound.git |

Uploaded | Sun Oct 13 22:50:21 UTC 2013 by EdwardKmett |

Distributions | LTSHaskell:2.0.1, NixOS:2.0.1, Stackage:2.0.1 |

Downloads | 9156 total (122 in the last 30 days) |

Rating | 2.5 (3 ratings) [clear rating] |

Status | Docs available [build log] Successful builds reported [all 1 reports] Hackage Matrix CI |

## Downloads

- bound-0.9.1.tar.gz [browse] (Cabal source package)
- Package description (included in the package)