Compiler warnings: using 'class' keyword for protocol inheritance is deprecated; use 'AnyObject' instead

[bobergj]

Is this a support request?
No

Describe the bug

Compiler warnings: "warning: using 'class' keyword for protocol inheritance is deprecated; use 'AnyObject' instead" when linking the LaunchDarkly Swift package.

To reproduce

1. Add LaunchDarkly swift package to Xcode project
2. import LaunchDarkly somewhere in app target
3. Build the app the app target

Expected behavior
No compiler warnings from LaunchDarkly that pollute our build log

Logs

<censored>/SourcePackages/checkouts/ios-client-sdk/LaunchDarkly/LaunchDarkly/Networking/DarklyService.swift:15:35: warning: using 'class' keyword for protocol inheritance is deprecated; use 'AnyObject' instead

<censored>/checkouts/ios-client-sdk/LaunchDarkly/LaunchDarkly/Networking/DarklyService.swift:22:33: warning: using 'class' keyword for protocol inheritance is deprecated; use 'AnyObject' instead

SDK version
5.3.2, but the issues occur in the latest code as well:
https://github.com/launchdarkly/ios-client-sdk/blob/v5/LaunchDarkly/LaunchDarkly/Networking/DarklyService.swift#L15
https://github.com/launchdarkly/ios-client-sdk/blob/v5/LaunchDarkly/LaunchDarkly/Networking/DarklyService.swift#L22

Language version, developer tools
Xcode Version 12.5 (12E262)

OS/platform
macOS 11.2.3 (20D91)

Additional context
N/A

[bwoskow-ld]

Hi @bobergj,

Thanks for letting us know about this. We haven't yet seen these warnings ourselves and are thinking that this deprecation check may have been introduced in Xcode 12.5.

I have noted this issue on our backlog and we will address it in an upcoming SDK release.

Cheers,
@bwoskow-ld

Filed internally as 110317.

[bobergj]

are thinking that this deprecation check may have been introduced in Xcode 12.5.

Yes, this deprecation warning is introduced in Swift 5.4 which shipped in Xcode 12.5

[gwhelanLD]

Hi @bobergj,

We've included a fix for this issue in the 5.4.2 release. Thanks for reporting it!

Thanks,
@gwhelanLD