greatcodeclub / simple_parser

A simple demo parser to play with Jison

A simple parser demo project

A demo project from the http://greatcodeclub.com/ to play with parsing and Jison.

Installation

You need:

• A recent version of node.
• make. You probably have it already.

To install Node modules and start the test:

$ npm install
$ make watch

Then modify any file, the parser will be recompiled and the file test.js will be executed.

How to browse the code

Here are the files you should take a look at, in logical order:

1. tokens.jisonlex defines the tokens produced by the lexer.
2. grammar.jison is the grammar defining the syntax. It is compiled to parser.js.
3. test.js uses the parser to parse and output the results to the console. Modify this file.

How to modify the parser?

Here's an idea to modify the parser on your own. Try adding support for parsing false or floating point numbers.

You first need to define a new token in tokens.jisonlex:

[regexp/string to match that token]        return 'A_UNIQUE_AND_AWESOME_NAME'

Then, add that tokens to grammar.jison.

expression:
  ...
| A_UNIQUE_AND_AWESOME_NAME
; 

You can test your parser using test.js.

License

Copyright 2014 Coded Inc.
[e-mail]

You are free to modify and distribute this however you want. Except for teaching purposes.