TWISt-shout-2017-09-18.md

TWISt-shout Newsletter 2017-09-18

This Week In Swift for the week of 2017-09-11 to 2017-09-17

Code Updates

• swift:192 - Slava Pestov (39), Doug Gregor (20), Andrew Trick (19)
• swift-compiler-rt:13 - Vedant Kumar (9), Evgeniy Stepanov (3), Sean Eveson (1)
• swift-corelibs-foundation:8 - Xiaodi Wu (3), Ian Partridge (2), John Holdsworth (2)
• swift-corelibs-xctest:3 - John Holdsworth (3)
• swift-protobuf:2 - Tim Kientzle (2)
• swift-clang:25 - Vedant Kumar (15), Douglas Gregor (3), Eli Friedman (2)
• swift-llvm:44 - Vedant Kumar (17), Igor Breger (4), Adrian Prantl (3)

Commit Message of the Week

• pred-memopts: Debride all dead MarkUninitialized related code from DIMemoryUseCollector.

swift

• SR-5814 - removes dead code around REFLECT_OBJC_IVARS

• Add support for collecting various SIL optimizer counters

• Codable: excluded vars shouldn’t need explicit val

• SR-5763 - Diagnose unreachable optional evaluation exprs

• SR-5841 - GSB: Eliminate self-derived nested-type-name-match constraints..

• SR-318 - Sequence: Make Sequence.SubSequence conform to Sequence.

• SR-3376 - Use array copy runtime implementation instead of the array value witnesses

• Reworking ClangImporter to not depend on Sema, part 4

• SR-5636 - runtime: Add some missing -isNSWhatever__ methods to SwiftObject. (#11891)

• SR-5857 - changed diagnostics argument name to argument label

• ClangImporter: Support Swift 5 API notes

• Data slice mutation support (#11939)

swift-corelibs

Foundation Classes

• NSNumber - More Darwin compatibility fixes
• Stream - Remove round-trip bridging
• URLSession - Use the workQueue.; Thread safety

Dev

• Value-type bound protocols

• Notes on the coroutines ABI

• Absolute paths in executable .swiftmodule files

Evolution

• Updated Proposal - Enums and Source Compatibility

• Explicit Synthetic Behaviour

  • continues here
  • and here