Swift support

[hamin]

Now that Swift has been open sourced, wondering how difficult it would be to add swift support. Would love to help out

[macmade]

Codeine uses ClangKit to parse source code:
https://github.com/macmade/ClangKit

ClangKit is basically an Objective-C frontend to libclang.
That's how syntax highlighting, error reporting and code completions are implemented.

Looking at Apple's GitHub, I can see a swift-clang repository:
https://github.com/apple/swift-clang

So it might just work out of the box by recompiling this version of clang into ClangKit.