Analysis of information sources in references of the Wikipedia article "سوئیفت (زبان برنامهنویسی)" in Persian language version.
Swift borrows a clever feature from the D language: these identifiers expand to the location of the caller when evaluated in a default argument list.
I started work on the Swift Programming Language in July of 2010. I implemented much of the basic language structure, with only a few people knowing of its existence. A few other (amazing) people started contributing in earnest late in 2011, and it became a major focus for the Apple Developer Tools group in July 2013 [...] drawing ideas from Objective-C, Rust, Haskell, Ruby, Python, C#, CLU, and far too many others to list.
