Defining a token

I am using the SQL language definition and I want to create a state similar to the comment state called TriCommentState. However, I want the editor to enter this state when the user types "---" vs the "--" for the normal comment state.

I want it to work the same as the comment state with the state ending at the end of the line but I cannot seem to define a parsing item to handle this. Any ideas?

I tried copying the commentstate block and using --- and putting it in front of the comment state but it always seems to go into the regular comment state.

Any ideas?

Thanks