Asynchronous effects

We explore asynchronous programming with algebraic effects. complement their conventional synchronous treatment by showing how to naturally also accommodate asynchrony within them, namely, decoupling the execution of operation calls into signalling that an operation’s implementation needs be executed, and interrupting a running computation result, which can react installing interrupt handlers. formalise these ideas in small core calculus, called λ æ . demonstrate flexibility using examples ranging from multi-party web application, preemptive multi-threading, remote function calls, parallel variant runners In addition, paper is accompanied formalisation ’s type safety proofs Agda, prototype OCaml.