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Date:         Sat, 31 Dec 2011 12:51:01 +0100
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From: Ulrike Fischer <news3@NILILAND.DE>
Subject: Re: \leavevmode?
To: LATEX-L@listserv.uni-heidelberg.de
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Status: R

Am Fri, 30 Dec 2011 21:31:36 +0000 schrieb Joseph Wright:


>>> what is the recommended way to issue a \leavevmode in latex3?

>> I guess the answer is not yet. Eventually the underlying concept should
>> be part of the galley module. But how this will provided in the end
>> depends a little bit on how far we take this module. There have been two
>> different implementations initially with somewhat different concepts and
>> the new one by Joseph implements some but not all of the original one
>> (for good reasons I would say).
 
> In some parts of the coffin code, we do this 'directly' using
 
>   \hbox_unpack:N \c_empty_box

Well I thought about 

  \hbox_unpack_clear:N\c_empty_box  

(as the documentation of source3 says that \hbox_unpack_clear:N is
\unhbox).

And as I can see l3galley uses 

  \tex_unhbox:D \c_empty_box.

Is there any real difference between the three variants?

And is the name in l3galley "\galley_leave_vmode:" stable? I would
prefer a standard command instead of my own local
\leavemode-command. \leavemode is imho such a central concept that
it should have a standard name. 

I wish you all a happy new year!


-- 
Ulrike Fischer