Introduction to Gears

This is a book about Gears, an experimental asynchronous programming library for Scala 3!

Gears aim to provide a basis for writing cross-platform high-level asynchronous code with direct-style Scala and structured concurrency, while allowing library implementations to deal with external asynchronous IO with featureful primitives and expose a simple direct-style API.

While Gears is currently in experimental stage (definitely not recommended for production!), we provide basic support for

• Virtual-threads-enabled JVM environments (JRE 21 or later, or JRE 19 with experimental virtual threads enabled)
• Scala Native 0.5.0 or later with delimited continuations support (on Linux, MacOS and BSDs).