In my larger document (approx 600 pages, over 1000 references)
problematic entries like \cite[{{A, B, and C}}] did not display at all,
though the document did process without claims of stack errors etc.
Curiously,
\goto{A, B, and C}[{{A, B, and C}}]
does work as expected.

Alan

On Thu, Feb 23, 2017 at 4:12 PM, Alan Bowen <bowenalan03@gmail.com> wrote:

> Thanks, Hans! That does work nicely.
>
> On Thu, Feb 23, 2017 at 3:42 PM, Hans Hagen <pragma@wxs.nl> wrote:
>
>> On 2/22/2017 6:21 PM, Alan Bowen wrote:
>>
>>> Here is the file that I have been working with:
>>>
>>> \installlanguage[packed][en]
>>> \setuplanguage[packed][spacing=packed]
>>> \startsetups[tightspace]
>>>   \spaceskip 0.5\interwordspace plus .5\interwordstretch minus
>>> \interwordshrink
>>> \stopsetups
>>>
>>> \def\dostartbibitem[#1]{\startBibItem[title={#1},reference={#1}]}
>>> \def\startbibitem{\dosingleempty\dostartbibitem}
>>> \def\stopbibitem{\stopBibItem}
>>>
>>> \definedescription[BibItem][
>>> width=broad,
>>> margin=1.5pc,
>>> indenting={no},
>>> indentnext=no,
>>> alternative=hanging,
>>> hang=1,
>>> headcommand=\gobbleoneargument,
>>> align=right,
>>> before={\directsetup{tightspace}\bgroup\language[packed]},
>>> after={\egroup},
>>> ]
>>>
>>> \definereferenceformat [cite]  [type=title,left={},right={}]
>>> \definereferenceformat [bibpage]   [type=page]
>>>
>>> \starttext
>>>
>>> \startbibitem[A, B, and C]\stopbibitem % TEST by commenting these
>>> %\startbibitem[A{,} B{,} and C]\stopbibitem% lines out
>>>
>>> \startbibitem[ABC]\stopbibitem
>>> \startbibitem[A]\stopbibitem
>>> \startbibitem[B]\stopbibitem
>>> \startbibitem[C]\stopbibitem
>>>
>>> * \cite[A, B, and C] \qquad{\red output should  be: A{,} B{,} and C}
>>>
>>> **\cite[ABC] \qquad{\red output should be: ABC}
>>>
>>> ***\cite[A], \cite[B], \cite[C]  \qquad{\red output should be: A, B, C}
>>>
>>> ****\cite[A]\cite[B]\cite[C] \qquad{\red output should be: ABC}
>>>
>>> \stoptext
>>>
>>
>> references can be a comma separated list, so
>>
>> A, B, and C
>>
>> is actually three tags:  "A" "B" "and C"
>>
>> so, you run into parsing problems, so how to deal with:
>>
>> [A, B, and C]
>>
>> maybe:
>>
>> [{A, B, and C}]
>>
>> alas, in comma separated list the first level of {} is removed but we can
>> cheat:
>>
>> [{{A, B, and C}}]
>>
>> works with \cite [{{A, B, and C}}]
>>
>> 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
>> -----------------------------------------------------------------
>> ____________________________________________________________
>> _______________________
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>
>