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Sender: Mailing list for the LaTeX3 project <[log in to unmask]>
Date: Sun, 29 Jan 2012 13:28:48 +0000
Reply-To: Mailing list for the LaTeX3 project <[log in to unmask]>
Message-ID: <[log in to unmask]>
Subject: Re: Unexpandability inside \csname
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From: Joseph Wright <[log in to unmask]>
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Hello Bruno,

On 29/01/2012 13:17, Bruno Le Floch wrote:
> Perhaps you meant
> 
>   \csname\ifnum 3>2\fi\endcsname
> 
> which indeeds does \csname\relax\endcsname, an error.

We should be fine here in expl3, I think, as internally we have
something like

  \csname\ifnum\numexpr3\relax>\numexpr2\relax\fi\endcsname

in this scenario, and that is fine.
-- 
Joseph Wright

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