TWISt-shout-2017-01-30.md

TWISt-shout Newsletter 2017-01-30

This Week In Swift for the week of 2017-01-23 to 2017-01-29

##Hot News

• Swift 3.1 Development snapshots available on swift.org

• Swift 4 Package Manager Roadmap

• Faster Mix-and-Match Builds with Precompiled Bridging Headers

##Swift Style

• Pretty much every way to assign optionals

• Callback in Swift

##Code Updates

• swift:193 - Michael Gottesman (27), Slava Pestov (22), Erik Eckstein (20)
• swift-compiler-rt:2 - Hans Wennborg (2)
• swift-corelibs-foundation:24 - Syo Ikeda (16), Sergej Jaskiewicz (4), Tony Parker (3)
• swift-corelibs-libdispatch:3 - Kim Topley (2), David Grove (1)
• swift-package-manager:9 - Ankit Aggarwal (8), t_hayashi (1)
• swift-protobuf:5 - Tim Kientzle (5)
• swift-clang:28 - Hans Wennborg (9), Akira Hatanaka (6), Alex Lorenz (5)
• swift-llvm:35 - Hans Wennborg (13), Kevin Enderby (5), Ahmed Bougacha (4)
• swift-lldb:15 - Sean Callanan (13), Jason Molenda (1), Kuba Mracek (1)
• swift-llbuild:26 - Hugh Bellamy (22), Boris Bügling (2), Daniel Dunbar (2)
• swift-evolution:6 - Boris Bügling (2), Chris Eidhof (1), Daniel Dunbar (1)

Commit Message of the Week

• Joe is taking over as the overall maintainer of Swift, thanks Joe!

###swift

• ClangImporter: Prefer available enum elements over unavailable ones

• Add Ubuntu 14.04 support back

• update-checkout: Add support for swift-4.0-branch

• Add a new tool called SILLLVMGen that performs IRGen on a sil or sib file without adding any additional complexity.l

• Switch MetadataCache to use a global slab allocator.

###swift-corelibs

Announcement

URLSession test fest! Thread

Code Changes

• Fix + and - operations on DispatchTime and DispatchWallTime

• Correct the Xcode fixits for dispatch_async() and dispatch_group_async().

• Fixes inccorrect behavior of DispatchData.copyBytes() when the start index is not 0 and adds a test for that method

These are all the classes that have changed in swift-corelibs-foundation

• NSCache - Replace some AnyObject usages with Any to match the Darwin version
• NSCalendar - Merge pull request #824 from ikesyo/nscalendar-operator-static-func; Calendar components from:to: date fix
• NSCoder - Merge branch 'master' into nscoder-doc; Add doc comments for NSCoder; Rename public APIs to match the Darwin version
• NSDecimal - Replace some AnyObject usages with Any to match the Darwin version
• NSDecimalNumber - Replace some AnyObject usages with Any to match the Darwin version
• NSDictionary - Replace some AnyObject usages with Any to match the Darwin version
• NSError - Use Error for the NSErrorRecoveryAttempting API; Replace some AnyObject usages with Any to match the Darwin version
• NSGeometry - Rename NSAlignmentOptions and its constants to match the Darwin version
• NSHTTPCookieStorage - Rename to NSSortDescriptor to match the Darwin version
• NSKeyedArchiver - Add doc comments (#842); [NSObject] Rename replacementObjectFor... to match the Darwin version; Merge pull request #820 from ikesyo/prefer-isEmpty
• NSKeyedUnarchiver - Merge pull request #835 from ikesyo/keyedunarchiver-throw-error; Don't discard errors in unarchiveTopLevelObjectWithData; [NSCoder] Rename public APIs to match the Darwin version
• NSLocale - Replace some AnyObject usages with Any to match the Darwin version
• NSNotification - Replace some AnyObject usages with Any to match the Darwin version
• NSObject - [NSObject] Rename replacementObjectFor... to match the Darwin version; Replace some AnyObject usages with Any to match the Darwin version; Add doc comments for NSObject (#822)
• NSSortDescriptor - Rename to NSSortDescriptor to match the Darwin version; Replace some AnyObject usages with Any to match the Darwin version
• NSString - Replace some AnyObject usages with Any to match the Darwin version
• NSURLProtocol - Replace some AnyObject usages with Any to match the Darwin version
• Process - [Process] Implement terminationReason

##Server Dev

• Server Security API Group Meeting. If you're interested, just read all of these: Week of Jan 23, Week of Jan 30

##Evolution

• Annotation of Warnings/Errors

• Swift ABI Stability Manifesto, Thread, Thread

• A case for postponing ABI stability

###Proposals Up For Review

• SE-0149 (Jan 31) - Package Manager Support for Top of Tree development

• SE-150 (Jan 31) - Package Manager Support for branches

###Proposals Accepted

• SE-0148 - Generic Subscripts

###Draft Proposals

• Opaque SIL values

• Test-Only Package Dependencies and Targets

• Formal Protocol for Contiguous Storage Visitation

• Subclass Existentials