Add support for async await

[bordunosp]

are you planning to move to the "async-await" paradigm?
mb there is already some branch for tests?

[glbrntt]

Yes, we plan on adopting async await. We don't have anything for users to play around with yet though.

[bordunosp]

swift-nio has already demo sources for support swift 5.5
https://github.com/apple/swift-nio/tree/main/Sources/NIOAsyncAwaitDemo

and around this vapor has branch https://github.com/vapor/vapor/tree/async-await

[glbrntt]

We now have an experimental release with initial support async/await https://github.com/grpc/grpc-swift/releases/tag/1.4.1-async-await.1

[Jerry-Carter]

Thank you for the 1.4.1-async-await branch. Curious what the roadmap is. Specifically, are there plans for a 1.5.0-async-await branch? Do you anticipate this being folded in before 2.0? Thanks.

[glbrntt]

Thank you for the 1.4.1-async-await branch. Curious what the roadmap is. Specifically, are there plans for a 1.5.0-async-await branch?

Yes, we'll try to get that done soon.

Do you anticipate this being folded in before 2.0?

Yes. The rough plan is to expose an async/await API alongside the existing API in a 1.x release so folks can move over to it if/when they choose. The next major version would drop the old API and keep just the async/await API as close as feasibly possible (at least for generated clients and service providers) in order to make migration from 1.x to 2.x less painful.

With that in mind I'd like to leave this a little more time to let the current async/await APIs bake and also to improve test coverage. Feedback on APIs, usability and so on are always helpful so please let us know if you have any thoughts!

[glbrntt]

Support for async await was added in the 1.8.0 release.

[cristian064]

Support for async await was added in the 1.8.0 release.

Hi do you know where can I find the documentation about how to use async await on GRPC?

[glbrntt]

This is probably the best place to start: https://github.com/grpc/grpc-swift/blob/main/docs/basic-tutorial.md