I haven't used it yet, but intrigued by your comment I did a bit of research, and here's the gist of what I have understood: the company behind Silver is RemObj

I haven't used it yet, but intrigued by your comment I did a bit of research, and here's the gist of what I have understood: the company behind Silver is RemObjects, and they offer a cross-platform compiler suite called Elements, which supports three languages: C#, Oxygene (their own creation, apparently heavily influenced by Object Pascal) and now Silver, which is Swift with "a few features" added to bring it in line with the other two languages. They're trying to downplay the additions for obvious reasons, but they sound pretty hefty to me: Exception Handling, Partial/Static Classes, External/Inline Functions, Events etc. Imagine what Rob Pike would say if someone came along and added all that to Go ;) (see https://docs.elementscompiler.com/ https://docs.elementscompiler.com/ and https://docs.elementscompiler.com/Silver/LanguageExtensions/ https://docs.elementscompiler.com/Silver/LanguageExtensions/ for details). That being said, the compiler (and IDE for Mac) are freely available, so you can try it out. RemObjects have been around for a while and I was pleased with their products back in the day when I was developing in Delphi, so I'm sure Elements is a solid product as well, just maybe not what you are expecting...