Choreographies as Functions

We propose a new interpretation of choreographies as functions, whereby coordination protocols for concurrent and distributed systems are expressed in terms of a λ-calculus. Our language is expressive enough to enable, for the first time, the writing of higher-order protocols that do not require central control. Nevertheless, it retains the simplicity and elegance of the λ-calculus, and it is possible to translate choreographies into endpoint implementations. 2012 ACM Subject Classification Theory of computation → Lambda calculus; Theory of computation → Distributed computing models; Computing methodologies → Distributed programming languages

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