Sound Regular Corecursion in coFJ

Davide Ancona, Pietro Barbieri, Francesco Dagnino, Elena Zucca, Tobias Pape, Robert Hirschfeld
2020 European Conference on Object-Oriented Programming  
The aim of the paper is to provide solid foundations for a programming paradigm natively supporting the creation and manipulation of cyclic data structures. To this end, we describe coFJ, a Java-like calculus where objects can be infinite and methods are equipped with a codefinition (an alternative body). We provide an abstract semantics of the calculus based on the framework of inference systems with corules. In coFJ with this semantics, FJ recursive methods on finite objects can be extended
more » ... infinite objects as well, and behave as desired by the programmer, by specifying a codefinition. We also describe an operational semantics which can be directly implemented in a programming language, and prove the soundness of such semantics with respect to the abstract one.
doi:10.4230/lipics.ecoop.2020.1 dblp:conf/ecoop/AnconaBDZ19 fatcat:g3wzfqyp2rfgfakt5tbuxle5gi