The Crunchy Bridge CLI is written in crystal: https://github.com/CrunchyData/bridge-cli/. The program that monitors databases is likewise a crystal program. There are a few other crystal programs rolling around.
My biggest grievance with Crystal is the lack of incremental compilation. I understand why it's difficult to achieve given the language model, and some of the conveniences of that model. I've been watching the Crystal Interpreter with interest, it would be pretty cool if it could speed up my `M-x crystal-spec-line` interactions, along with all the other usual benefits of an interpreter.
On the other hand, there's a lot to like about Crystal: it has a convenient yet powerful type system, good error messages, good support for invoking C subroutines in libraries, and generates efficient object code in a straightforward manner.
My biggest grievance with Crystal is the lack of incremental compilation. I understand why it's difficult to achieve given the language model, and some of the conveniences of that model. I've been watching the Crystal Interpreter with interest, it would be pretty cool if it could speed up my `M-x crystal-spec-line` interactions, along with all the other usual benefits of an interpreter.
On the other hand, there's a lot to like about Crystal: it has a convenient yet powerful type system, good error messages, good support for invoking C subroutines in libraries, and generates efficient object code in a straightforward manner.