From: puellula@... Date: 2005-10-30T18:07:06+09:00 Subject: Re: PARSER for RUBY OK :) Now it's all ok, I had understand where is the problem. I had to write like this: program : compstmt; compstmt : stmt; stmt : LPAREN stmt1; stmt1 : smtp ; where LPAREN is "(". Now, I have to write the ruby grammar because I need a grammar with this feature. Thanks to all. If we can help me I'm very happy :) Thank you for yours interest. bye bye puellula