Proceedings of the ACM on Programming Languages | VOL. 6
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A simple and efficient implementation of strong call by need by an abstract machine

Publication Date Aug 29, 2022

Abstract

We present an abstract machine for a strong call-by-need strategy in the lambda calculus. The machine has been derived automatically from a higher-order evaluator that uses the technique of memothunks to implement laziness. The derivation has been done with the use of an off-the-shelf transformation tool implementing the "functional correspondence" between higher-order interpreters and abstract machines, and it yields a simple and concise description of the machine. We prove that the resulting machine conservatively extends the lazy version of Krivine machine for the weak call-by-need strategy, and that it simulates the normal-order strategy in bilinear number of steps.

Concepts

Simple Description Simple Implementation Krivine Machine Transformation Tool Lambda Calculus Efficient Implementation

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