Eff (programming language)

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Eff is a general-purpose, high-level, multi-paradigm, functional programming language similar in syntax to OCaml which integrates the functions of algebraic effect handlers.^[1][2]

effect Get_next : (unit -> unit) option effect Add_to_queue : (unit -> unit) -> unit  let queue initial = handler   | effect Get_next k ->     ( fun queue -> match queue with         | [] -> (continue k None) []         | hd::tl -> (continue k (Some hd)) tl )   | effect (Add_to_queue y) k -> ( fun queue -> (continue k ()) (queue @ [y]))   | x -> ( fun _ -> x)   | finally x -> x initial ;; 

• Official website
• Eff on GitHub

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