[NTG-context] \lgroup in mkIV

Aditya Mahajan adityam at umich.edu
Sun Jan 9 00:30:29 CET 2011


On Sat, 8 Jan 2011, Khaled Hosny wrote:

> On Sat, Jan 08, 2011 at 02:59:35PM -0500, Aditya Mahajan wrote:
>> On Sat, 8 Jan 2011, Khaled Hosny wrote:
>>
>>> On Sat, Jan 08, 2011 at 12:52:38PM -0500, Aditya Mahajan wrote:
>>>> On Sat, 8 Jan 2011, Daniel Schopper wrote:
>>>>
>>>>> Hi,
>>>>> are the delimiters \lgroup and \rgroup supported in MkIV?
>>>>> This
>>>>>
>>>>> \starttext
>>>>> $$\bigg\lgroup\dots\bigg\rgroup$$
>>>>> \stoptext
>>>>>
>>>>> is ok in MkII (ConTeXt ver: 2011.01.06) but when compiled with
>>>>> MkIV (ConTeXt ver: 2010.07.30 11:35 and ver: 2010.07.30 11:35) the
>>>>> delimiters are not shown. (By the way, the same holds true for
>>>>> \rmoustache and \lmoustache.)
>>>>
>>>>> Am I missing something?
>>>>
>>>> No. The math mappings of virtual fonts are incomplete. The symbols
>>>> should work correctly with unicode math fonts like cambria, asana,
>>>> and xits. But, it appears that lgroup and rgroup are missing from
>>>> xits (Khaled?)
>>>
>>> There are, but context is looking for the wring character; it is looking
>>> for U+3014 (which I think is a CJK bracket and does not look like
>>> \lgroup either) while it should be looking for U+27EE (whose Unicode
>>> annotation precisely says "lgroup"):
>>
>> Hmm ... 27EE does not exist: http://unicode.org/charts/PDF/U32-27C0.pdf
>> I believe that I used 3014 based on
>> http://www-sop.inria.fr/apics/tralics/doc-l.html#cmd-lgroup
>>
>> What source do you use for the symbols?
>
> I opened Gnome's Character Map and searched for lgroup :) (but I've seen
> it before, so I know it exists, I just don't recall the code point). Now
> that you asked, I checked Unicode website and they have "Miscellaneous
> Mathematical Symbols-A":
>
> http://unicode.org/charts/PDF/U27C0.pdf

That was the same range that I had looked at, but somehow that pdf did not 
have 27EC-27EF. Neither does char-def.lua. So, I guess that these are 
newer additions. I will add them to char-def.lua and correct the mappings 
for lgroup and rgroup.

Aditya


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