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edn-js's Introduction

edn-js

*Update: putting this in the freezer for now since there are some JS implementations already, and I'd rather start using edn immediately. Feel free to pick through this!

This is a PEG.js generated edn parser in JavaScript.

I've setup the infrastructure and written a simple spec using the pegjs standard example. A few of the basic values can be consumed. Check out spec/coffee/simple_spec.coffee.

Testing

Specs are in CoffeeScript, and using the following to auto-compile them: coffee -o spec/js -cw spec/coffee/*

Development Notes

  • pegjs src/edn.pegjs lib/edn.js to build parser
  • jasmine-node spec to run all specs
  • unlike edn-ruby, which uses Parslet, pegjs seems to mix the parser and the transformer
  • I decided to make a parser to produce a JSON AST first and then worry about a transformer later
  • Created src/dev from peg.js's online development environment. Added ability to select file (edn.pegjs) and insert its contents into the appropriate textarea.

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