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Sender: Mailing list for the LaTeX3 project <[log in to unmask]>
Date: Mon, 3 Jan 2011 15:41:56 +0000
Reply-To: Mailing list for the LaTeX3 project <[log in to unmask]>
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From: Joseph Wright <[log in to unmask]>
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On 03/01/2011 15:16, Will Robertson wrote:
> Not for xparse, no. We have steered away from offering features that will work sometimes but not always (with the exception of the expandable optional argument parsing, which is in a bit of a funny spot -- I lean toward suggesting it should be moved to another package).

On the expandable stuff, there are a lot of 'health warnings', and I 
think somewhere I said that this particular feature might not survive 

(Totally agree on the general gist: anything which needs 'special 
consideration' at the argument level is beyond what xparse can do.)
Joseph Wright