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Logical Algorithms meets CHR: A meta-complexity result for Constraint Handling Rules with rule priorities

Published online by Cambridge University Press:  10 February 2009

LESLIE DE KONINCK*
Affiliation:
Department of Computer Science, K.U.Leuven, Belgium (e-mail: leslie.dekoninck@cs.kuleuven.be)

Abstract

This paper investigates the relationship between the Logical Algorithms (LA) language of Ganzinger and McAllester and Constraint Handling Rules (CHR). We present a translation schema from LA to CHRrp: CHR with rule priorities, and show that the meta-complexity theorem for LA can be applied to a subset of CHRrp via inverse translation. Inspired by the high-level implementation proposal for Logical Algorithm by Ganzinger and McAllester and based on a new scheduling algorithm, we propose an alternative implementation for CHRrp that gives strong complexity guarantees and results in a new and accurate meta-complexity theorem for CHRrp. It is furthermore shown that the translation from Logical Algorithms to CHRrp combined with the new CHRrp implementation satisfies the required complexity for the Logical Algorithms meta-complexity result to hold.

Type
Regular Papers
Copyright
Copyright © Cambridge University Press 2009

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