Modern Swift concurrency#2
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Adopt the Swift 6.2 Approachable Concurrency upcoming features (NonisolatedNonsendingByDefault and InferIsolatedConformances) across the library, test, and tool targets. The public async API keeps its existing signatures; under the new default, nonisolated async entry points run on the caller's executor. Mark the streaming line reader's async iterator next() @Concurrent so large-file and remote-stream parsing continues to run off the caller's executor. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Document the adoption of the Approachable Concurrency upcoming features in the change log. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
Adopt the Swift 6.2 Approachable Concurrency upcoming features
(
NonisolatedNonsendingByDefaultandInferIsolatedConformances) across thelibrary, test, and tool targets. SwiftDOF was already a clean Swift 6.2
structured-concurrency codebase (async/await, custom
AsyncSequencelinereaders, an actor for progress, Swift Testing), so there were no
GCD/threads/locks/
nonisolated(unsafe)/MainActor.run/@unchecked Sendable/@preconcurrencysites to migrate.The public async API keeps the same signatures and existing source compiles
unchanged. Under the new default, the execution domain of
nonisolatedasyncentry points (
init(url:),init(bytes:),from(url:)) follows the caller'sexecutor. The streaming byte line reader's async iterator
(
AsyncBytesLineReader.AsyncIterator.next()) is marked@concurrentsolarge-file and remote-stream parsing continues to run off the caller's executor
under the new default.
No public API signatures changed; this is a source-compatible behavioral
modernization.
Verification
swift build --build-testspasses.passed.
Version
New version: 1.1.0 (minor — source-compatible behavioral change to async
execution semantics). The GitHub release will be cut after this PR is merged.
🤖 Generated with Claude Code