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LiquidEff: Algebraic Foundations for Liquid Effects

Description du projet

De nouvelles approches pour aider les logiciels à se comporter «correctement»

On dit souvent que c’est en faisant des erreurs que l’on apprend le plus car les erreurs nous contraignent à réfléchir en profondeur à la façon dont certaines choses fonctionnent. Il en va de même en matière de programmation, car il est beaucoup plus facile de corriger un bogue lorsqu’il provoque une erreur que de s’assurer a priori que notre programme gère toutes les exceptions possibles. Compte tenu de l’importance, tant pratique que financière, de prévoir tous les résultats potentiels et de les prendre en compte, il existe de nombreuses approches pour garantir que les programmes ne connaissent pas de défaillance. La marge d’amélioration reste toutefois importante, et de multiples incitations économiques nous poussent à évoluer en ce sens. Le projet LiquidEff, financé par l’UE, développe actuellement une extension du langage de programmation Eff dont le but sera de faciliter considérablement la manipulation des mégadonnées.

Objectif

The goal of the LiquidEff project is to significantly advance the state of the art of type-based reasoning about the correctness of programs that can incorporate computational effects such as accessing memory, raising and handling exceptions, making nondeterministic and probabilistic choices, and communicating over a network---all integral features of modern mainstream programming languages. The timeliness and importance of this project is demonstrated by the staggering cost of software failure in our increasingly digital world---one recent study put the number at $1.7 trillion worldwide in 2017 alone. While there already exist different approaches to type-based reasoning about the correctness of effectful programs, they all have their notable shortcomings: the approaches might be tied to a specific typing discipline, the supported effects can be limited, and the kind of properties one can reason about may be restricted. In contrast, the LiquidEff project aims to develop a foundational, uniform, and widely applicable framework for type-based reasoning about effectful programs, based on the highly scalable and modular algebraic approach to modelling computational effects. Specifically, this project will 1) develop an expressive modal logic for reasoning about a wide range of computational effects; 2) show that this logic can express existing effect specification styles; 3) demonstrate that it can be used to design refinement type systems for lightweight type-based reasoning about effectful behaviour, thus giving a general account of the Liquid Effects effect-typing discipline that so far has been restricted to the state effect; 4) study the category-theoretic semantics of these foundations; 5) implement LiquidEff, an extension of the Eff language with a support for lightweight type-level reasoning about programs' behaviour; and 6) use LiquidEff to apply the developed theory in practice to case studies involving big data and asynchronous parallel programming.

Régime de financement

MSCA-IF-EF-ST - Standard EF

Coordinateur

UNIVERZA V LJUBLJANI
Contribution nette de l'UE
€ 150 040,32
Adresse
KONGRESNI TRG 12
1000 Ljubljana
Slovénie

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Région
Slovenija Zahodna Slovenija Osrednjeslovenska
Type d’activité
Higher or Secondary Education Establishments
Liens
Coût total
€ 150 040,32