[NTG-context] What's the difference between \dontleavehmode and \leavevmode?

Hans Hagen pragma at wxs.nl
Thu Aug 18 23:48:34 CEST 2016


On 8/18/2016 8:14 PM, Henri Menke wrote:
> Hans, Wolfgang,
>
> thank you for your speedy reply.  However, I still do not know the difference between \leavevmode and \quitvmode.  Could you please elaborate?

simple explanation: \quitvmode checks if it's in h mode already and 
doesn't do redundant mode switching (which involves injecting 
indentation boxes)

> Cheers, Henri
>
> On 08/18/2016 06:39 PM, Hans Hagen wrote:
>> On 8/18/2016 5:23 PM, Henri Menke wrote:
>>> Dear list,
>>>
>>> could someone please explain what is the difference between \dontleavehmode and \leavevmode?
>>>
>>> Internally, I also stumbled upon \quitvmode.  Is this a synonym for \leavevmode?  It seems to be primitive.
>>
>> \leavevmode is kind of useless as it can interfere in spacing so we always used \dontleavehmode in context (a macro) that later was added as primitive \quitvmode to luatex
>>
>> You sometimes need \dontleavehmode to make sure you enter hmode (esp when you start a paragraph with a group or boxed stuff)
>>
>> (the only two places in context where \leavevmode is used is in rather plain macros that get overloaded later)
>>
>> Hans
>>
>> -----------------------------------------------------------------
>>                                           Hans Hagen | PRAGMA ADE
>>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>>        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
>> -----------------------------------------------------------------
>> ___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to the Wiki!
>>
>> maillist : ntg-context at ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
>> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
>> archive  : http://foundry.supelec.fr/projects/contextrev/
>> wiki     : http://contextgarden.net
>> ___________________________________________________________________________________
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context at ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>


-- 

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------


More information about the ntg-context mailing list