A SwiftPM CLI package experimenting with Swift async/await and structured concurrency.
Requires the latest development snapshot to run.
Note that 5.4 snapshots currently aren't fully compatible with this sample code, as they are a bit
out of date with the accepted async/await proposal, requiring the use of await try instead of try await.
It should work though if you adjust the code here manually to account for that.
After installing the toolchain, you can build the executable with
/Library/Developer/Toolchains/swift-DEVELOPMENT-SNAPSHOT-2021-01-12-a.xctoolchain/usr/bin/swift buildBefore running anything in the project, you have to point it to the
new concurrency runtime by modifying the DYLD_LIBRARY_PATH environment variable.
export DYLD_LIBRARY_PATH=/Library/Developer/Toolchains/swift-DEVELOPMENT-SNAPSHOT-2021-01-12-a.xctoolchain/usr/lib/swift/macosx/Then run the executable directly:
.build/debug/ConcurrencyExample(You can't use swift run to run the executable on macOS because Sytem Integrity Protection doesn't pass the DYLD_LIBRARY-PATH variable to SIP-protected processes.)
Please refer to this article for a detailed review of code in the package – "Introduction to structured concurrency in Swift: continuations, tasks, and cancellation".