A version of Jison with support for ES6 modules

Install with npm i jiwson -g. Without -g option, the cli version goes to: ./node_module/.bin/jiwson.

Full cli option list:

Usage: jiwson [file] [lexfile] [options]

file        file containing a grammar
lexfile     file containing a lexical grammar

Options:
   -j, --json                    force jison to expect a grammar in JSON format
   -o FILE, --outfile FILE       Filename and base module name of the generated parser
   -t, --debug                   Debug mode
   -m TYPE, --module-type TYPE   The type of module to generate (commonjs, amd, js, es6)
   -p TYPE, --parser-type TYPE   The type of algorithm to use for the parser (lr0, slr, lalr, lr)
   -V, --version                 print version and exit

Fo example:

jiwson ./path/to/grammar.bnf -m es6 -o my-parser.mjs

Usage from a CommonJS module

After npm i jiwson, you can generate parsers programatically from JavaScript as well.

// mygenerator.js
var Parser = require("jiwson").Parser;

// a grammar in JSON
var grammar = {
    "lex": {
        "rules": [
           ["\\s+", "/* skip whitespace */"],
           ["[a-f0-9]+", "return 'HEX';"]
        ]
    },

    "bnf": {
        "hex_strings" :[ "hex_strings HEX",
                         "HEX" ]
    }
};

// `grammar` can also be a string that uses jison's grammar format
var parser = new Parser(grammar);

// generate source, ready to be written to disk
var parserSource = parser.generate();

// you can also use the parser directly from memory

// returns true
parser.parse("adfe34bc e82a");

// throws lexical error
parser.parse("adfe34bc zxg");

Usage within ES6

import { Parser } from "jiwson/lib/jison.mjs";

// ... the rest is as above

Original License

Copyright (c) 2009-2014 Zachary Carter

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.