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Parser: jashkenas Coffeescript

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Andre Lewis edited this page Sep 10, 2016 · 10 revisions

jashkenas/coffeescript

=== A breakdown of the original Coffeescript parser, to help understand and eventually provide a guide to adding to. Based on the thread here:

The original Coffeescript Parser

Pros

  • It gets the job done.
  • There’s coffeelint.
  • The "standard" to ensure compatibility with.

Cons

  • Codebase is crufty and convoluted
  • Many pull requests are mired and may never be integrated
  • Adding new features is complicated
  • It is too permissive: It accepts more input code as legal than was intended, while still outputting valid JavaScript. This has led to disagreements on what is legal CoffeeScript and what is not.

Parser Overview

Parser Details:

Excerpt from CS Pull Request by JimPanic

ES2013 Compliance:

ES2015 compliance:

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