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Fuzion: A New Language For The OpenJDK Unifying Java's Concepts

Talkat FOSDEM 2022 · on Saturday, 2022-02-05· at 17:20· D.openjdk· [compilers-and-language-design]

Describes Fuzion, a new general-purpose language that unifies classes, interfaces, methods, constructors, packages, fields and local variables into a single concept called a Fuzion feature. Explains how Java concepts are mapped to that feature model, shows the fzjava tool which provides Fuzion interfaces to Java libraries, and presents the Fuzion interpreter plus a planned Java bytecode back-end. Also covers language design choices (design-by-contract, nested features/closures, simple IR) intended to enable optimizing compilers and static analysis for safety and allocation control.

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