Effekt Language A language with lexical effect handlers and lightweight effect polymorphism Try it yourself! def eager[R] { p: => R / { flip, fail, error } } = try { Success(p()) } with flip { resume(true) match { case Failure(msg) => resume(false) case Success(res) => Success(res) case ParseError(msg) => ParseError(msg) } } with fail { msg => Failure(msg) } with error { msg => ParseError(msg) } F
Why Algebraic Effects Algebraic effects1 (a.k.a. effect handlers) are a very useful up-and-coming feature that I personally think will see a huge surge in popularity in the programming languages of tomorrow. They’re one of the core features of Ante, as well as being the focus of many research languages including Koka, Effekt, Eff, and Flix. However, while many articles or documentation snippets tr
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