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Date: Sun, 11 Dec 2005 00:54:49 +0100
From: Lionel Draghi <Lionel.nospam.Draghi@Ada-France.org>
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Date: 2005-12-11T00:54:48+01:00
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Is 3.0b the latest available OpenToken version?
I'am not so sure, because some of the examples don't compile
using gnat 4.0.3 (Debian 4.0.2-4).

Here is my problem : I am implementing a recursive descent parser, and 
my grammar contains optionnals keywords, that will be ignored.
Here is an exemple:
- do this and this
- do this and also this
"also" is an optionnal keyword.

I am wondering what is the best way to deal with this.
What comes to my mind is to create a selection (In OpenToken parlance) 
between the keyword "also" and a null token, child of the abstract 
"Recognizer.Nothing" token.

It seems far to complex to be the right way. Any hints?

-- 
Lionel Draghi

PS : and once more question : is there still a mail list for OpenToken 
on AdaPower site? (I would like to have a look at the archive)