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CONTRIBUTING.md

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Thanks for your interest in the Rascal MPL project!

Rascal is a (meta) programming language with the following features:

  1. type-checker,
  2. interpreter that type-checks,
  3. compiler
  4. standard library
  5. parser generator
  6. top-down context-free general parsing algorithm
  7. hash-trie based implementation of relational calculus (via capsule)
  8. immutable values (sets, lists, numbers, maps, algebraic data-types), via vallang
  9. REPL
  10. Eclipse IDE with IDE generator based on Eclipse IMP (see https://github.com/usethesource/rascal-eclipse)
  11. VScode IDE with IDE generator based on LSP (see https://github.com/cwi-swat/rascal-vscode)
  12. Interactive documentation (tutor) compiler
  13. Interactive documentation content
  14. Libraries for
    • Java analysis
    • C++ analysis
    • PHP analysis
    • Python analysis
    • Javascript analysis
    • HTML5-based UI implementations (salix library)
    • Git analysis
    • etc.

Contributing to libraries or the standard library is preferred over contributions to the core implementation features since features in the core are tangled and therefore complex. We do have a lot of tests, so if you plan to contribute a bug-fix or a new feature don't forget to run mvn test. If you are a parser, type-checking, or functional programming/term-rewriting expert, please do not hesitate to give us feedback or suggestions, we love those topics and it's always good to talk to a fellow enthusiast and learn something new.

If you'd like to contribute a new library or library function do not hesitate to contact us: open an enhancement or bug issue here and we can start discussing the ins and outs of your idea! Also we'd be able to help out; you don't have to do it all alone.