GraphQL Elixir
==============
[](https://travis-ci.org/joshprice/graphql-elixir)
[](https://graphql-slack.herokuapp.com/)
An Elixir implementation of Facebook's GraphQL.
Status
------
This is a work in progress, right now here's what is done:
- [x] Parser for GraphQL (including Type definitions)
- [x] AST matching the `graphql-js` types as closely as possible
- [ ] Schema definition
- [ ] Query execution
- [ ] Introspection
Resources
---------
See the incredible [GraphQL Spec](http://facebook.github.io/graphql/). This incredibly well written spec made writing the GraphQL parser pretty straightforward.
Implementation
--------------
Tokenisation is done with [leex](http://erlang.org/doc/man/leex.html) and parsing with [yecc](http://erlang.org/doc/man/yecc.html). Both very useful Erlang tools for parsing. Yecc in particular is used by Elixir itself.
Some resources on using leex and yecc:
* http://relops.com/blog/2014/01/13/leex_and_yecc/
* http://andrealeopardi.com/posts/tokenizing-and-parsing-in-elixir-using-leex-and-yecc/
Developers
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### Atom Editor Support
> Using the `language-babel` package? `.xrl` and `.yrl` files not syntax highlighting?
Syntax highlighting in Atom for `leex` (`.xrl`) and `yecc` (`yrl`) can be added by modifying `grammars/erlang.cson`.
Just open the `atom-language-erlang` package code in Atom and make the change described here:
https://github.com/jonathanmarvens/atom-language-erlang/pull/11
however if that PR has been merged then just grab the latest version of the plugin!
Contributing
------------
We actively welcome pull requests, bug reports, feedback, issues, questions. Come and chat in the [#erlang channel on Slack](https://graphql-slack.herokuapp.com/)
License
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[BSD](https://github.com/joshprice/graphql-elixir/blob/master/LICENSE).
