Hi, <br>I am playing around the Racket recently, implementing a lexer for a toy language.<br><br>I understand the calculator example in the parser-tool, but it is too simple, are there more sophisticated examples that show how to use all features of in the Racket lexer mentioned in the doc?<br>
<br>In the read.rkt example, I am especially confused how the start-pos and end-pos are used....<br><br>Thanks for any suggestions.....<br><br>Jenny<br>