I have a project with both C++ and ObjC code in Xcode 10 and the C++ code completion doesn't work anymore at all. I get the "No Completions" popup message when there should be suggestions.
This is specific to C++ and Xcode 10 as I can open the same project in Xcode 9 and the code completion works as expected and the ObjC part of the project works too in Xcode 10.
I've tried rebuilds, deleting ~/Library/DerivedData folder, unchecking and checking in Preferences | Text Editor | Code Completion (with accompanied restarts of Xcode) and nothing works.
Ideas of Xcode 10 bug?