`:` is not applied in the correct place for function signature Fix-It

[kimdv]

Description

#1549 (comment)
Test case testInvalid13

Steps to Reproduce

No response

[ahoppen]

Tracked in Apple’s issue tracker as rdar://108656824

[TiagoMaiaL]

I would like to start working on this issue. Is it ok if I get assigned to it? cc: @ahoppen @kimdv

[ahoppen]

It’s yours now. Thanks for looking into it.

In my opinion the key here is to detect that we are missing a type annotation and checking whether the internal parameter name starts with an uppercase letter, which usually indicates that it is meant to be a type name. We are already doing something similar here

https://github.com/apple/swift-syntax/blob/d14176d74bff98aa877bbf284a8bccd4bb02c833/Sources/SwiftParser/Types.swift#L551

[TiagoMaiaL]

I think we can close this issue 🎉

Thank you for your assistance, @ahoppen!