Grdb.swift: Xcode 12 error: "Cannot find 'CodingKeys' in scope"

[groue]

This error is a compiler bug: https://bugs.swift.org/browse/SR-13137 (please click the link and vote in order to help having it fixed).

It happens when a Column defined by one record type is used in another file.

A workaround is to prepend CodingKeys with the name of the record:

 struct Player: Codable {
     var score: Int
     ...
 }
 extension Player: FetchableRecord {
     enum Columns {
-        static let score = Column(CodingKeys.score)
+        // TODO: remove `Player.` prefix when SR-13137 is solved
+        static let score = Column(Player.CodingKeys.score)
     }
 }

[vmanot]

@groue voted! I'm also noticing segfaults with enums that rely on automatic String conversion.

[groue]

What do you mean @vmanot? Do you have any information or code to share regarding those enums? It's impossible to guess with your first message.

[vmanot]

@groue I should've been more clear, my comment was about Swift 5.3 and nothing specific to GRDB. I'm noticing simple enums such as the following:

enum Foo: String {
    case bar
    case baz
}

Cause segfaults in Swift 5.3 (as of Xcode12b5), in moderately complex and large codebases.

I just wanted to know whether you've experienced issues of the same sort. It's not a problem with GRDB.

[groue]

All right, thanks for the details. No I haven't met such issue with the Swift 5.3 compiler yet!

[groue]

The fix https://github.com/apple/swift/pull/33586 was merged into the Swift 5.3 compiler. Xcode 12 beta 6 does not include it yet. Let's wait for the next Xcode release.

[groue]

Xcode version 12.0 (12A7209) wasn't shipped with the fix :-/

[groue]

Xcode version 12.2 beta (12B5018i) has fixed the issue 🙂

[tobyspark]

Perhaps worth noting that while you can submit apps to Testflight with the beta Xcode, you can only submit apps for App Store release with the public (GM) Xcode.

[groue]

Xcode 12.2 has shipped, I can close this issue.

[AngelSteve13]

For me it was the target check.