Journal article

Optimizing compilation of constraint handling rules in HAL

C Holzbaur, MG De la Banda, PJ Stuckey, GJ Duck

Theory and Practice of Logic Programming | CAMBRIDGE UNIV PRESS | Published : 2005


In this paper we discuss the optimizing compilation of Constraint Handling Rules (CHRs). CHRs are a multi-headed committed choice constraint language, commonly applied for writing incremental constraint solvers. CHRs are usually implemented as a language extension that compiles to the underlying language. In this paper we show how we can use different kinds of information in the compilation of CHRs to obtain access efficiency, and a better translation of the CHR rules into the underlying language, which in this case is HAL. The kinds of information used include the types, modes, determinism, functional dependencies and symmetries of the CHR constraints. We also show how to analyze CHR progra..

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