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## Abstract

We present an algebraic treatment of exception handlers and, more generally, introduce handlers for other computational effects representable by an algebraic theory. These include nondeterminism, interactive input/output, concurrency, state, time, and their combinations; in all cases the computation monad is the free-model monad of the theory. Each such handler corresponds to a model of the theory for the effects at hand. The handling construct, which applies a handler to a computation, is based on the one introduced by Benton and Kennedy, and is interpreted using the homomorphism induced by the universal property of the free model. This general construct can be used to describe previously unrelated concepts from both theory and practice.

Original language | English |
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Title of host publication | Programming Languages and Systems |

Subtitle of host publication | 18th European Symposium on Programming, ESOP 2009, Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS 2009, York, UK, March 22-29, 2009. Proceedings |

Editors | Giuseppe Castagna |

Publisher | Springer-Verlag GmbH |

Pages | 80-94 |

Number of pages | 15 |

ISBN (Print) | 978-3-642-00589-3 |

DOIs | |

Publication status | Published - 2009 |

### Publication series

Name | Lecture Notes in Computer Science |
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Publisher | Springer Berlin / Heidelberg |

Volume | 5502 |

ISSN (Print) | 0302-9743 |

ISSN (Electronic) | 1611-3349 |

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## Projects

- 1 Finished