cocodelabs/NSAttributedString-CCLFormat — pull request #3 by Igor-Palaguta (2014-12-24 13:42:03+00:00)
Title: Some improvements for Swift compatibility

Call of objc function (not from Foundation) with variable arguments is not trivial or even impossible, as solution we can use va_list as argument

e.g.
let attributedString = return NSAttributedString(format: "%@ %@", arguments: getVaList([userName, text]))