ArraySection compile error: Type 'C' constrained to non-protocol, non-class type [Element]

[cnstoll]

Great. This template thing completely removed what I wrote.

[cnstoll]

Since I can't really re-write all of that, basically I'm getting the error in the title trying to compile ArraySection in Xcode 10.2.1.

For some reason that I can't explain, changing Collection to Sequence fixes it. 🤷‍♂

I think this is related to a recent update that added the Element associated type, but I'm honestly not sure.

[cnstoll]

It looks like this is a namespacing issue. The compiler thinks that "Collection" is the DifferenceKit's Collection instead of the Swift.Collection version. Changing "Collection" to "Swift.Collection" also fixes this error.

[ra1028]

Hi @cnstoll ,

Thanks for your reporting.
I can compile without problems in my environment.
Let me know more about your situation according to issue template you deleted?
https://github.com/ra1028/DifferenceKit/blob/master/.github/ISSUE_TEMPLATE/QUESTION.md

[larsacus]

I can confirm this is a result of the namespace aliasing between Swift.Collection and the "re-defined" associated type Collection: Swift.Collection where Collection.Element: Differentiable in DifferentiableSection.swift. Same workaround as above "fixes" the issue, but there may be some other lingering issues with having this associated type named the same as a system type.

Xcode 10.2, Swift 4.2

[AnisovAleksey]

The same issue. Reproduced only in Archive, debug build works fine.

Xcode: 12.5
Cocoapods: 1.10.1
Library version: 1.2.0