crystal
https://github.com/crystal-lang/crystal
Crystal
The Crystal Programming Language
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- Issues
- Proc(Void) doesn't always lower to Proc(Nil)
- First-class functions
- Non-blocking `flock` without raising
- Unable to call a private class method from instance
- Add FileUtils.rm_f for delete all files but no folder, no prompt.
- The error message that instance variable declaration must be in class scope should take precedence
- Add the short form --error-trace.
- Add Ruby equivalent of YAML.load_file for YAML/JSON/INI/CSV etc.
- Autocasting from `Bool?` to `Bool`
- Yields should be able to not request the block's value during codegen
- Docs
- Crystal not yet supported