Recently i read this article from Erica Sadun: swift-bracing

I’ve always preferred Allman Style rather than 1TBS Style.

For objective-C i was using BBUncrustify to automatically format my code to Allman Style on save.

However, neither clang-format nor Uncrustify work at the moment for Swift langage.

I found this project called Swimat which does Swift Source code formatting. I published a quick hack to support Allman Style:

Swimat fork with Allman style option: https://github.com/giln/Swimat.