Swiftweekly.github.io: [141] Issue #141 - August 22, 2019

[BasThomas]

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[fassko]

Swift Server Workgroup meeting July 25th, 2019

https://forums.swift.org/t/july-25th-2019/27732

[fassko]

Opening this thread up to continue the discussion started here, about whether it's appropriate provide a default implementation relying on ObjectIdentifier.

To set expectations clearly: the proposal has been accepted and the default implementation will ship in Swift 5.1. There is no possibility of it being removed from that release, given the point we are at in the convergence of 5.1, regardless of the direction of this discussion.

https://forums.swift.org/t/identifiable-and-object-identity/27784

[BasThomas]

https://twitter.com/slava_pestov/status/1160616505589030914

[BasThomas]

https://twitter.com/olebegemann/status/1160846803274801152

Autodiscovery of test methods on Linux* is now a thing in recent Swift 5.1 snapshots. You should be able to delete LinuxMain.swift and run your tests with:

swift test --enable-test-discovery

• and other non-Darwin platforms

[..] here’s @aciidb0mb3r’s PR: https://github.com/apple/swift-package-manager/pull/2174. Looks like it extracts the symbols from the compiled object files and generates the necessary __allTests extensions on the fly.

[fassko]

stdlibCore now always lowers ownership /after/ running the diagnostic passes

Early this morning, I flipped the switch causing stdlibCore to always lower ownership /after/ running the diagnostic passes. This is a large milestone for ownership in general since this is the first time we have exposed some passes downstream of the Mandatory Inlining to ownership in the build itself (vs tests). It will ensure that changes in tree do not break basic functionality when we are in this mode (something that I have run into)

https://forums.swift.org/t/stdlibcore-now-always-lowers-ownership-after-running-the-diagnostic-passes/27832

[fassko]

https://twitter.com/Lukasaoz/status/1161323863411777537

https://forums.swift.org/t/swiftnio-http-2-security-notice/27855

All swift-nio-http2 users, please update to swift-nio-http2 version 1.5.0 urgently.

A number of HTTP/2 server implementations have been discovered to be at risk of a number of different denial of service attacks. SwiftNIO HTTP/2 has been affected by several of these vulnerabilities. This disclosure covers all of them.

All SwiftNIO HTTP/2 versions between 1.0.0 and 1.4.0 inclusive are affected.

[fassko]

Skipping call to getter when oldValue is not used in didSet

This proposal aims to make a small change to the semantics of didSet, so that the call to the property's getter is skipped if the user does not refer to the oldValue in the body of the observer.

https://forums.swift.org/t/skipping-call-to-getter-when-oldvalue-is-not-used-in-didset/27858

[BasThomas]

https://twitter.com/jckarter/status/1161298507527000064

@dgregor79 implemented a secret feature that lets you implement the wrapper as a static subscript with access to self. Use at your own risk https://github.com/apple/swift/pull/25884

[fassko]

Swift-package-manager on Windows? Sure Why Not!

https://forums.swift.org/t/swift-package-manager-on-windows-sure-why-not/27884

[fassko]

Thread Sanitizer for Swift on Linux

https://swift.org/blog/tsan-support-on-linux/

https://forums.swift.org/t/swift-org-blog-thread-sanitizer-for-swift-on-linux/27872

[fassko]

This maybe can be fun one https://github.com/apple/swift/pull/26650

[fassko]

Future directions of Property Wrappers

https://forums.swift.org/t/future-directions-of-property-wrappers/27934

[fassko]

[Proposal: SSWG Incubation Process Change] Discourage use of *Unsafe*

https://forums.swift.org/t/proposal-sswg-incubation-process-change-discourage-use-of-unsafe/27921

Proposal for SSWG incubation process change: add section about security requirements

https://forums.swift.org/t/proposal-for-sswg-incubation-process-change-add-section-about-security-requirements/27943

[fassko]

LLVM is now on C++14

LLVM and clang are now compiling with C++14 as of yesterday: llvm.org/D66195
CMake projects will just inherit this build setting, but other builds will need to be updated. There's already some C++14 specific code in the LLVM codebase, so incoming merges will be broken unless all Swift builds also use C++14.

https://forums.swift.org/t/llvm-is-now-on-c-14/27931

https://github.com/apple/swift/pull/26673

[fassko]

https://swiftrocks.com/using-lldb-manually-xcode-console-tricks.html

[fassko]

Maybe will add https://www.swiftbysundell.com/podcast/54 as it covers Swift 5.1

[fassko]

https://twitter.com/benlangmuir/status/1163495488051507200

https://forums.swift.org/t/sourcekit-lsp-preview-in-swift-org-toolchain-snapshots/28026

[BasThomas]

Maybe will add https://www.swiftbysundell.com/podcast/54 as it covers Swift 5.1

And has this funny guy right here on it as well

[fassko]

Building .swiftmodules for SourceKit

https://forums.swift.org/t/building-swiftmodules-for-sourcekit/28030

[fassko]

Default Protocol Implementation Inheritance Behaviour - The current situation and what/if anything should be done about it

https://forums.swift.org/t/default-protocol-implementation-inheritance-behaviour-the-current-situation-and-what-if-anything-should-be-done-about-it/28049

[fassko]

https://forums.swift.org/t/key-path-cannot-refer-to-static-member/28055