port of JS/CC to nodejs
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badlee Merge pull request #7 from jf89/master
Fixed a bug with epsilon lookaheads.
Latest commit 886a422 Jul 22, 2015



This project is a implementation of JS/CC to nodejs (version >= 0.4.7).


JS/CC is the first available parser development system for JavaScript and ECMAScript-derivates. It has been developed, both, with the intention of building a productive compiler development system and creating an easy-to-use academic environment for people interested in how parse table generation is done generally in bottom-up parsing.

The platform-independent software unions both: A regular expression-based lexical analyzer generator matching individual tokens from the input character stream and a LALR(1) parser generator, computing the parse tables for a given context-free grammar specification and building a stand-alone, working parser. The context-free grammar feeds to JS/CC is defined in a Backus-Naur-Form-based meta language, and allows the insertion of individual semantic code to be evaluated on a rule's reduction.

JS/CC itself has been entirely written in JavaScript. These versions are capable of assembling a complete compiler from a JS/CC parser specification, which is then stored to a .js JavaScript source file.

To use JS/CC and for understanding its internals and behaviors, some knowledge of context-free grammars, bottom-up parsing techniques and compiler construction theory, in general, is assumed.


For all documentation read the jscc_manual.pdf in doc/ folder.


npm install jscc-node

This install a jscc binary inside your node path, that you can run from the shell


jscc [options] filename


-h   --help               Print this usage help
-i   --version            Print version and copyright
-o   --output <file>      Save output source to <file>
-p   --prefix <prefix>    Use <prefix> as sequence pre-fixing methods and variables
-t   --template <file>    Use template file <file> as parser template (by default driver_node.js_  is located in root folder)
-v   --verbose            Run in verbose mode
-w   --warnings           Print warning messages
-c   --compress           Compress output source using PACKER BASE62
-s   --shrink             Shrink variables of output source using PACKER
-cs  --compress-shrink    Shrink variables of output source and Compress output source
-m   --minimize           Minimize output source using PACKER


For sample grammar see par/ folder.
You will find
- dragon.par : My own language (Implementation in progress...)
- php.par    : PHP grammar from phype project (implementation of php in progress...)
- ruby.par   : Ruby grammar from 8ball project (implementation of ruby in progress...)
- calc.par   : Calculator grammar from JS/CC sample
- xpl.par	 : Grammar for eXample Programming Language from JS/CC sample