code: function white() {
  		var c = walker.ch,
  			token = '';
  	
  		while (c === " " || c === "\t") {
  			token += c;
  			c = walker.nextChar();
  		}
  	
  		tokener(token, 'white');
  	
  	}
docs: token handlers follow for: white space, comment, string, identifier, number, operator