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Is Crystal a superset of Ruby where any valid Ruby project is a valid Crystal project -- just lacking type definition? If Crystal can do that then I think adopt

• chrisseaton 8y ago
  > Is Crystal a superset of Ruby where any valid Ruby project is a valid Crystal project No. So the idea pretty much stops there.
• masukomi 8y ago
  As @chrisseaton said, no, BUT some ruby is valid Crystal. I think it would be more accurate to say that a subset of Crystal is valid Ruby, and a subset of Ruby is valid Crystal.
  • freedomben 8y ago
    That's correct. You can run your Crystal programs with the Ruby interpreter, but you can't compile your Ruby to Crystal (simple scripts usually work, but bigger things that use use gems probably won't).
    • djur 8y ago
      You can't run a lot of Crystal code in Ruby, either. They implement keyword arguments completely differently (Crystal does it more like Python, where all arguments can be specified by name or position) and of course Ruby doesn't support Crystal syntax relating to types. Crystal also has a tuple type with a literal syntax ({1, 2, 3}) that isn't valid Ruby. But otherwise it's fairly close.
      • freedomben 8y ago
        Thank you for the correction, I was not aware of this.