jison-lex

lexical analyzer generator used by jison

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Readme

jison-lex
A lexical analyzer generator used by jison. It takes a lexical grammar definition (either in JSON or Bison's lexical grammar format) and outputs a JavaScript lexer.

install

npm install jison-lex -g

usage

Usage: jison-lex [file] [options]

file     file containing a lexical grammar

Options:
   -o FILE, --outfile FILE       Filename and base module name of the generated parser
   -t TYPE, --module-type TYPE   The type of module to generate (commonjs, js)
   --version                     print version and exit

programatic usage

``` var JisonLex = require('jison-lex');
var grammar = { rules:
["x", "return 'X';" ],
["y", "return 'Y';" ],
["$", "return 'EOF';" ]
};
// or load from a file // var grammar = fs.readFileSync('mylexer.l', 'utf8');
// generate source var lexerSource = JisonLex.generate(grammar);
// or create a parser in memory var lexer = new JisonLex(grammar); lexer.setInput('xyxxy'); lexer.lex(); // => 'X' lexer.lex(); // => 'Y'

license

MIT