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gears

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An Experimental Asynchronous Programming Library for Scala 3. It aims to be:

  • Simple: enables direct-style programming (suspending with .await, calling Async-functions directly) and comes with few simple concepts.
  • Structured: allows an idiomatic way of structuring concurrent programs minimizing computation leaking (structured concurrency), while providing a toolbox for dealing with external, unstructured events.
  • Cross-platform: Works on both JVM >=21 and Scala Native.

Getting Started

The Gears Book is a great way to getting started with programming using Gears. It provides a tutorial, as well as a guided walkthrough of all concepts available within Gears.

Adding gears to your dependencies

With sbt:

  libraryDependencies += "ch.epfl.lamp" %%% "gears" % "<version>",

With mill:

def ivyDeps = Agg(
  // ... other dependencies
  ivy"ch.epfl.lamp::gears:<version>"
)

With scala (since 3.5.0) or scala-cli:

//> using dep "ch.epfl.lamp::gears:<version>"

Setting up on an unpublished version of Gears

You will need JDK >= 21 and Scala Native set up.

sbt publishLocal

Contributing

We are happy to take issues, pull requests and discussions!

For a quick look at our development environment and workflow, check our the contributing guide.

Related Projects

You might also be interested in:

  • ox: Safe direct-style concurrency and resiliency for Scala on the JVM.

License

Copyright 2024 LAMP, EPFL.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

See LICENSE for more details.