Crisp is one of Lisp dialect which is based on mal and implemented with Crystal. This project is a toy box for my dynamic language ideas.

• Refactorings
  • Make is_a? guards more elegant
  • Import test cases from Mal
  • Add CI
  • More OOP (evaluator, remove global variable, move states into object)
  • Use standard readline implementation
  • Better lexer and parser
  • Add examples
  • More convenient REPL (e.g. completion)
• New language features using Crystal's semantics
  • Algebraic data type
  • ...

1. Install crystal command
2. Run shards install for installing dependencies
3. Run crystal build /path/to/Crisp/crisp.cr to build an executable (add --release for the release build)
4. Put the built crisp executable in a $PATH directory

Please see mal test cases for now.

• macOS or Linux
• Crystal 0.33.0 or later

Distributed under the MIT License.

Copyright (c) 2015 rhysd