C, C++, Objective-C, and Swift language support for Atom-IDE, powered by the SourceKit Language Server by Apple.
This is still in an experimental package.
apm install ide-sourcekit
Something that you'll need to do in order to use the package is configure the sourcekit-lsp path location. Follow the instructions on sourcekit-lsp in order to get the sourcekit-lsp binary.
Once configured, reload Atom and open your project. Enjoy!
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.