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References: <48C38EC1.9040807@morningstar2.co.uk>
            <E8E9A43D-3D11-469C-A988-49CA19CA0519@gmail.com>
Message-ID:  <18628.7468.77437.963030@morse.mittelbach-online.de>
Date:         Sun, 7 Sep 2008 20:27:56 +0200
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From: Frank Mittelbach <frank.mittelbach@LATEX-PROJECT.ORG>
Subject: Re: Spaces
To: LATEX-L@LISTSERV.UNI-HEIDELBERG.DE
In-Reply-To:  <E8E9A43D-3D11-469C-A988-49CA19CA0519@gmail.com>
Precedence: list
Status: R

Will Robertson writes:
 > On 07/09/2008, at 5:50 PM, Joseph Wright wrote:
 > 
 > > Only the last one works as intended (by me).  Is there a LaTeX3 way to
 > > do this?
 > 
 > Interesting.
 > This is weird:
 > 
 >    \err_warn:nn{\temp~stuff~stuff}{}
 > 
 > Only the second tilde causes a space.

why would that be weird?

in plain TeX

  \errwarn{\temp stuff stuff} 

and only

  \errwarn{\temp\space stuff stuff}

in expl3 ~ is a space token and not an active char expanding to \space.

It is a bitof a pity that space tokens are so deep down within the TeX engine
behavior and that sometimes they get gobbled if explicit.

Interesting question if it would be possible to do ~ -> \space instead but my
guess is that this would break a lot of the current code

frank