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

Hans Hagen j.hagen at freedom.nl
Tue Mar 14 17:56:22 CET 2023

On 3/14/2023 5:33 PM, Gavin via ntg-context wrote:
> Hi Alan, Hans, and List,
>> On Mar 13, 2023, at 8:10 PM, Alan Braslau via ntg-context <ntg-context at ntg.nl> wrote:
>> On Mon, 13 Mar 2023 15:55:50 -0600 Gavin via ntg-context <ntg-context at ntg.nl> wrote:
>>>> 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?
>> Indeed, \unit{} should allow (and presently does not) K, C, etc.
> I agree. I added the following lines to phys-dim.lua, following line 461
>      C  = "coulomb",
>      K  = "kelvin",
>      N  = "newton",
> This provided the desired capital shortcuts without compromising the lowercase prefixes. Hans, could we get those added to phys-dim.lua in the distribution? I would be happy to do a more comprehensive search for shortcuts to add, but those are the three I and my collaborators are using now.

maybe, when there are no conflicts

> Looking at why my \registerunit attempt failed, I found that when you register a unit, both your capitalization, and an all lowercase version are registered. Here is an example, where I register “ReTeM” but \unit{1 retem} also works.
> \starttext
> \registerunit[unit][ReTeM=myunit]
> \setupunittext[myunit=reTeM]
> \startformula
>    \unit{1 ReTeM} = \unit{1 retem} \neq \unit{1 reteM}
> \stopformula
> \stoptext
> The results are case sensitive, so \unit{1 reteM} does not work. The lowercase version is produced for all “long” units, but not for shortcuts. (See phys-dim.lua, lines 766-771 where the Lua string function “lower” is used.) Perhaps we could use a \registershortcut command that does not get the “lower" treatment. I will look into it some more.

see previous mail, i already added that but no upload yet

> P.S. I think there is a spelling error in phys-dim.lua, lines 974-981.
> local mapping = {
>      prefix   = "prefixes",
>      unit     = "units",
>      operator = "operators",
>      suffixe  = "suffixes",
>      symbol   = "symbols",
>      packaged = "packaged",
> }
> The key “suffixe” should probably be “suffix”.
indeed, i noticed that when extending


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