[NTG-context] \unit parser ignoring case, in some cases.

[Hans Hagen]

On 3/13/2023 10:55 PM, Gavin wrote:
> 
> 
>> On Mar 13, 2023, at 3:44 PM, Hans Hagen via ntg-context <ntg-context at ntg.nl> wrote:
>>
>> On 3/9/2023 2:04 PM, Gavin via ntg-context wrote:
>>> \startformula
>>>    \unit{3 meter} \qquad
>>>    \unit{6 Meter} \qquad
>>>    \unit{3 mEtEr} \qquad
>>> \stopformula
>>> Units with lowercase prefixes (c, k, n).
>>> \startformula
>>>    \unit{3cm} \qquad
>>>    \unit{6kg} \qquad
>>>    \unit{3ns} \qquad
>>> \stopformula
>>> Units with capital letters, called with names (coulomb, kelvin, newton).
>>> \startformula
>>>    \unit{3 coulomb} \qquad
>>>    \unit{6 kelvin} \qquad
>>>    \unit{3 newton} \qquad
>>> \stopformula
>>
>> you can look at phys-dim and see plenty of short and long keys and making all case insensitive is asking for troubles
> 
> Indeed, I would like to make NONE of them case insensitive. But currently, when I register an upper case key (C=coulomb) it messes up the lower case prefix (“cm" gets typeset as C•m). I was expecting the parser to distinguish between the “C” and “c”, but it doesn’t. Is that intended?
I added an option and an extra registers but it's up to you to decide 
hwo to use it (and how to deal with conflicts in definitions).

\registerunit
   [unit]
   [Point=PT,
    point=pt,
    Basepoint=BP,
  % basepoint=bp,
    ]

\registerunitshortcut
   [unit]
   [C=coulomb]

\startlines
10 \unit {square meter per second}
10 \unit {square Meter per Second}
10 \unit {point}
10 \unit {Point}
10 \unit {basepoint}
10 \unit {Basepoint}
10 \unit {C}
\stoplines

\setupunit[unit][option=keep]

\startlines
10 \unit {square meter per second}
10 \unit {square Meter per Second}
10 \unit {point}
10 \unit {Point}
10 \unit {basepoint}
10 \unit {Basepoint}
10 \unit {C}
\stoplines


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