[Lrde Annonce] Accepted Article at ELS2019

Greetings Colleagues, We are happy to announce that our paper, Finite Automata Theory Based Optimization of Conditional Variable Binding, has been accepted to the 2019 European Lisp Symposium, to be held in Genova Italy in April. Authors Jim Newton and Didier Verna The paper can be found here https://www.lrde.epita.fr/dload/papers/newton.19.els.pdf <https://www.lrde.epita.fr/dload/papers/newton.19.els.pdf> And the abstract is as follows: We present an efficient and highly optimized implementation of destructuring-case in Common Lisp. This macro allows the selection of the most appropriate destructuring lambda list of several given based on structure and types of data at run-time and thereafter dispatches to the corresponding code branch. We examine an optimization technique, based on finite automata theory applied to conditional variable binding and execution, and type-based pattern matching on Common Lisp sequences. A risk of inefficiency associated with a naive implementation of destructuring-case is that the candidate expression being examined may be traversed multiple times, once for each clause whose format fails to match, and finally once for the successful match. We have implemented destructuring-case in such a way to avoid multiple traversals of the candidate expression. This article explains how this optimization has been implemented. Happy reading Jim