A wide purpose tokenizer for node.js which looks like a stream
node-tokenizer is published on npm so you can install it with
npm install tokenizer
- require the Tokenizer constructor
var Tokenizer = require'tokenizer';
- construct one (we'll see what the callback is used for)
var t = mycallback;
- add rules
taddRule/^my regex$/ 'type';
- write or pump to it
- listen for new tokens
ton'token'// do something useful// type is the type of the token (specified with addRule)// token is the actual matching string// alternatively you can use the tokenizer as a readable stream.
- look out for the end
the optional callback argument for the constructor is a function that will be called for each token in order to specify a different type by returning a string. The parameters passed to the function are token(the token that we found) and match, an object like this
regex: /whatever/ // the regex that matched the tokentype: 'type' // the type of the token
Have a look in the example folder
rules are regular expressions associated with a type name. The tokenizer tries to find the longest string matching one or more rules. When several rules match the same string, priority is given to the rule which was added first. (this may change)
Please note that your regular expressions should use ^ and $ in order to test the whole string. If these are not used, you rule will match every string that contains what you specified, this could be the whole file!
- a lot of optimisation
- being able to share rules across several tokenizers (although this can be achieved through inheritance)
- probably more hooks
- more checking
Copyright (c) 2012 Florent Jaby
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.
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