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Work it, wrap it, fix it, fold it

Part of: JFP Research Articles

Published online by Cambridge University Press:  16 April 2014

NEIL SCULTHORPE  and
GRAHAM HUTTON
NEIL SCULTHORPE
Affiliation:
University of Kansas, USA (e-mail: neil@ittc.ku.edu)
GRAHAM HUTTON
Affiliation:
University of Nottingham, UK (e-mail: Graham.Hutton@nottingham.ac.uk)
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Abstract

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The worker/wrapper transformation is a general-purpose technique for refactoring recursive programs to improve their performance. The two previous approaches to formalising the technique were based upon different recursion operators and different correctness conditions. In this paper we show how these two approaches can be generalised in a uniform manner by combining their correctness conditions, extend the theory with new conditions that are both necessary and sufficient to ensure the correctness of the worker/wrapper technique, and explore the benefits that result. All the proofs have been mechanically verified using the Agda system.

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Type
Articles
Information
Journal of Functional Programming , Volume 24 , Issue 1 , January 2014 , pp. 113 - 127
Copyright
Copyright © Cambridge University Press 2014 

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