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Session types are a typing discipline used to formally describe communication-driven applications with the aim of fewer errors and easier debugging later into the life cycle of the software. Protocols at the transport layer such as TCP,…

Programming Languages · Computer Science 2024-04-09 Samuel Cavoj , Ivan Nikitin , Colin Perkins , Ornela Dardha

Multiparty sessions are systems of concurrent processes, which allow several participants to communicate by sending and receiving messages. Their overall behaviour can be described by means of global types. Typable multiparty session enjoy…

Logic in Computer Science · Computer Science 2019-09-16 Franco Barbanera , Mariangiola Dezani-Ciancaglini

Objects and actors are communicating state machines, offering and consuming different services at different points in their lifecycle. Two complementary challenges arise when programming such systems. When objects interact, their state…

Programming Languages · Computer Science 2016-06-21 Roly Perera , Julien Lange , Simon J. Gay

Session types are types for specifying the protocols that communicating processes must follow in a concurrent system. When composing two or more well-typed processes, a session typing system must check whether such processes are multiparty…

Logic in Computer Science · Computer Science 2023-05-26 Marco Carbone , Sonia Marin , Carsten Schürmann

Session types denote message protocols between concurrent processes, allowing a type-safe expression of inter-process communication. Although previous work demonstrate a well-defined notion of subtyping where processes have different…

Programming Languages · Computer Science 2021-11-29 Chuta Sano , Stephanie Balzer , Frank Pfenning

Session types are a discipline for the static verification of message-passing programs. A session type specifies a channel's protocol as sequences of exchanges. It is most relevant to investigate session-based concurrency by identifying the…

Programming Languages · Computer Science 2024-01-24 Alen Arslanagic , Jorge A. Pérez , Anda-Amelia Palamariuc

Session types allow communication protocols to be specified type-theoretically so that protocol implementations can be verified by static type checking. We extend previous work on session types for distributed object-oriented languages in…

Programming Languages · Computer Science 2017-01-11 Simon J. Gay , Nils Gesbert , António Ravara , Vasco T. Vasconcelos

Concurrent systems are often complex and difficult to design. Choreographic languages, such as Multiparty Session Types (MPST), allow the description of global protocols of interactions by capturing valid patterns of interactions between…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-10-29 Telmo Ribeiro , José Proença , Mário Florido

For many application-level distributed protocols and parallel algorithms, the set of participants, the number of messages or the interaction structure are only known at run-time. This paper proposes a dependent type theory for multiparty…

Logic in Computer Science · Computer Science 2015-07-01 Pierre-Malo Denielou , Nobuko Yoshida , Andi Bejleri , Raymond Hu

Session types have been proposed as a means of statically verifying implementations of communication protocols. Although prior work has been successful in verifying some classes of protocols, it does not cope well with parameterized,…

Programming Languages · Computer Science 2012-08-24 Minas Charalambides , Peter Dinges , Gul Agha

Global types are formal specifications that describe communication protocols in terms of their global interactions. We present a new, streamlined language of global types equipped with a trace-based semantics and whose features and…

Programming Languages · Computer Science 2015-07-01 Giuseppe Castagna , Mariangiola Dezani-Ciancaglini , Luca Padovani

Secure Multi-Party Computation (MPC) is an important enabling technology for data privacy in modern distributed applications. We develop a new type theory to automatically enforce correctness,confidentiality, and integrity properties of…

Cryptography and Security · Computer Science 2025-01-30 Christian Skalka , Joseph P. Near

Session types are used to describe communication protocols in distributed systems and, as usual in type theories, session subtyping characterizes substitutability of the communicating processes. We investigate the (un)decidability of…

Programming Languages · Computer Science 2017-07-20 Mario Bravetti , Marco Carbone , Gianluigi Zavattaro

Multiparty session types (MP) are a type discipline for enforcing the structured, deadlock-free communication of concurrent and message-passing programs. Traditional MP have a limited form of choice in which alternative communication…

Logic in Computer Science · Computer Science 2024-06-10 Kirstin Peters , Nobuko Yoshida

Human fallibility, unpredictable operating environments, and the heterogeneity of hardware devices are driving the need for software to be able to adapt as seen in the Internet of Things or telecommunication networks. Unfortunately,…

Programming Languages · Computer Science 2021-05-17 Paul Harvey , Simon Fowler , Ornela Dardha , Simon J. Gay

We propose an interpretation of multiparty sessions with asynchronous communication as Flow Event Structures. We introduce a new notion of global type for asynchronous multiparty sessions, ensuring the expected properties for sessions,…

Logic in Computer Science · Computer Science 2026-04-08 Ilaria Castellani , Mariangiola Dezani-Ciancaglini , Paola Giannini

Replication is an alternative construct to recursion for describing infinite behaviours in the pi-calculus. In this paper we explore the implications of including type-level replication in Multiparty Session Types (MPST), a behavioural type…

Programming Languages · Computer Science 2025-01-27 Matthew Alan Le Brun , Simon Fowler , Ornela Dardha

This paper presents CAMP, a new static performance analysis framework for message-passing concurrent and distributed systems, based on the theory of multiparty session types (MPST). Understanding the run-time performance of concurrent and…

Programming Languages · Computer Science 2020-10-12 David Castro-Perez , Nobuko Yoshida

Programs are more distributed and concurrent today than ever before, and structural communications are at the core. Constructing and debugging such programs are hard due to the lack of formal specification/verification of concurrency. This…

Programming Languages · Computer Science 2018-08-02 Hanwen Wu , Hongwei Xi

Session types using affinity and exception handling mechanisms have been developed to ensure the communication safety of protocols implemented in concurrent and distributed programming languages. Nevertheless, current affine session types…

Programming Languages · Computer Science 2024-09-02 Ping Hou , Nicolas Lagaillardie , Nobuko Yoshida