Instead, use the `%target-swift-5.1-abi-triple` substitution to compile the tests
for deployment to the minimum OS versions required for use of _Concurrency APIs.
* Audit and correct AsyncSequence Sendability
* Annotate availability on Sendable conformances for AsyncSequences
* Fix typo of Sendable.Iterator
* Correct tests to use sendable builders
* Add @preconcurrency annotations and fixup one remaining missing @Sendable case
* Move preconcurrency to correct syntactical position
* Use unchecked Sendable conditional conformance instead of marking all internals as preconcurrency and sendable
* Use unchecked Sendable conditional conformance instead of marking all internals as preconcurrency and sendable for dropWhile
* claim ABI changes for marking of @preconcurrency as expected
The concurrency runtime now deploys back to macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, which corresponds to the 5.1 release of the stdlib.
Adjust macro usages accordingly.
Rather than blanket-disabling concurrency tests when we aren't using a
just-built concurrency library, enable them whenever we have a
suitable concurrency runtime, either just-built, in the OS, or via the
back-deployment libraries.
This allows programs to target older OSes while using Concurrency behind an availability check. When targeting older OSes, the symbols are weak-linked and the compiler will require the use of Concurrency features to be guarded by an availability check.
rdar://75850003
* Implementations for operators and async functions on AsyncSequence per SE-0298
* Add trailing new lines to AsyncSequence adopter files
* Remove extra // from preambles
* Transition sequence properties and sequence initializers to internal
* Rename Upstream to Base
* Rename "Failable" asynchronous sequences to "Throwing"
* Make iteration consistent with closure lifetimes and track failure via state
* Use for await syntax for async function extensions on AsyncSequence
* Work-around rethrows calculations being incorrect for conformance + closure rethrowing
* Update testing names to reflect Throwing versus Failable
* Incorperate runAsyncAndBlock into the test function for suite calls
* Remove @frozen from AsyncSequence operators
* Back out reduce family functions for now due to IRGen bug
* Additional corrections for throwing cases and fix up potential linux crasher
* Add a upstream and throwing tests and correct flatMap's throwing behavior
* Unify parameter names to count
* Add a more helpful precondition on prefix
* Add tests for throwing cases of non closure async functions on AsyncSequence
* Correct missing count transition in dropFirst
* Correct missing , in assertion
* [NFC] add commentary on optimization in dropFirst on dropFirst
* Disable collect tests for non macOS platforms for now
* Disable all async sequence tests for non macOS platforms for now
