2026-08-17T08:00:07Z https://drops.dagstuhl.de/oai

oai:drops-oai.dagstuhl.de:15724 2024-03-06T10:56:02Z ddc:004 open_access

Useful Open Call-By-Need Accattoli, Beniamino Leberle, Maico lambda calculus call-by-need operational semantics sharing cost models This paper studies useful sharing, which is a sophisticated optimization for λ-calculi, in the context of call-by-need evaluation in presence of open terms. Useful sharing turns out to be harder in call-by-need than in call-by-name or call-by-value, because call-by-need evaluates inside environments, making it harder to specify when a substitution step is useful. We isolate the key involved concepts and prove the correctness and the completeness of useful sharing in this setting. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Beniamino Accattoli and Maico Leberle 2022 Is Part Of LIPIcs, Volume 216, 30th EACSL Annual Conference on Computer Science Logic (CSL 2022) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/LIPIcs.CSL.2022.4 urn:nbn:de:0030-drops-157242 https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2022.4 eng https://creativecommons.org/licenses/by/4.0/legalcode