Pure methods for roDOT

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10485862" target="_blank" >RIV/00216208:11320/24:10485862 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.4230/LIPICS.ECOOP.2024.13" target="_blank" >https://doi.org/10.4230/LIPICS.ECOOP.2024.13</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4230/LIPICS.ECOOP.2024.13" target="_blank" >10.4230/LIPICS.ECOOP.2024.13</a>

Result language

angličtina

Original language name

Pure methods for roDOT

Original language description

Object-oriented programming languages typically allow mutation of objects, but pure methods are common too. There is great interest in recognizing which methods are pure, because it eases analysis of program behavior and allows modifying the program without changing its behavior. The roDOT calculus is a formal calculus extending DOT with reference mutability. In this paper, we explore purity conditions in roDOT and pose a SEF guarantee, by which the type system guarantees that methods of certain types are side-effect free. We use the idea from ReIm to detect pure methods by argument types. Applying this idea to roDOT required just a few changes to the type system, but necessitated re-working a significant part of the soundness proof. In addition, we state a transformation guarantee, which states that in a roDOT program, calls to SEF methods can be safely reordered without changing the outcome of the program. We proved type soundness of the updated roDOT calculus, using multiple layers of typing judgments. We proved the SEF guarantee by applying the Immutability guarantee, and the transformation guarantee by applying the SEF guarantee within a framework for reasoning about safe transformations of roDOT programs. All proofs are mechanized in Coq.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

ECOOP 2024

ISBN

978-3-95977-341-6

ISSN

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e-ISSN

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Number of pages

29

Pages from-to

1-29

Publisher name

Schloss Dagstuhl - Leibniz-Zentrum für Informatik

Place of publication

Neuveden

Event location

Videň

Event date

Sep 16, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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