Grammars and Parsing

Hi everyone
I'm trying to encode grammar rules so that I can build an application that recognizes whether a particular string is belongs to a particular language or not.
The grammar I have is:
Set := "{" Elementlist "}"
Elementlist := <empty> | List
List := Element | Element "," List
Element := Atom | Set
Atom := "{" | "}" | ","
I've spent quite some time trying to get this work but It always fails on me! This is for a dynamic programming assignment.
Cheers!

List := Element | Element "," List
Atom := "{" | "}" | ","
Those two could be problematic since your parser might see
- Element "," List
as - Element Atom List,
which is not in the grammar.
Sometimes it's easier to take a few lines of code and generate a grammar from the code. Do you have any code you're creating this grammar for?

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{code}
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http://ss64.com/ps/import-csv.html
Don't retire TechNet! -
(Don't give up yet - 13,085+ strong and growing)

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Double post.
http://forum.java.sun.com/thread.jspa?threadID=5233144&tstart=0

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import java.util.*;
import java.io.*;
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[\code]

Grammars and Parsing

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