# [NTG-context] Latin setupmathematics

Hans Hagen pragma at wxs.nl
Sun May 15 19:08:29 CEST 2016

On 5/15/2016 4:28 PM, Hans Åberg wrote:
>
>> On 15 May 2016, at 15:37, Hans Hagen <pragma at wxs.nl> wrote:
>>
>> On 5/14/2016 7:11 PM, Hans Åberg wrote:
>>> In order to align with Unicode, \setupmathematics might have Latin shape options, as the Greek ‘lcgreek’ and ‘ucgreek', say ‘lclatin' and ‘uclatin', both defaulting to ’italic’. Unicode added the Latin italic symbols to the Math Alphanumeric Symbols range, so the upright letters are inaccessible when italic is assigned to the Basic Latin (ASCII) range.
>>
>> I'm not sure what you mean. One can use \mathupright if needed. We support all the alphabets and these are independent of the basic latin range.
>
> Traditionally constants are set in upright and variables in italic. So constants like “log” etc., are set in upright. It is not used rigorously because of past typographical limitations, but one might in principle do that, cf. the example below, where the integral differential “d” is set in upright to disambiguate relative the function named “d”.
>
> When Unicode added math styles, it added italics, expecting the ASCII range to be upright, which would be normal if using a text editor that does not translate math into italics. But the TeX legacy is the opposite.
>
> ----
> \setupbodyfont[xits,10pt]
>
> \startformula
>  \startalign
>    I &= ∫_S d(x)\, dx \NR
>    I &= ∫_S 𝑑(x)\, dx \NR
>    I &= ∫_S d(x)\, \mathupright{d} x \NR
>    I &= ∫_S 𝑑(x)\, \mathupright{d} x \NR
>  \stopalign
> \stopformula

well, i guess unicode assumed messing with math input characters anyway
(given that some alphabets have holes) and a normal upright alphabet
would have made sense (after all emojs get added by the dozen every time
and there is no end at that so why on math)

anyway, so you want no mapping then, so this means something like

\unprotect
\let\mathitalic\mathdefault
\appendtoks
\edef\p_default{\mathematicsparameter\c!default}%
\ifx\p_default\v!normal
\let\mathdefault\mathupright
\else
\let\mathdefault\mathitalic
\fi
\to \everysetupmathematics
\protect

\setupmathematics[default=normal]

(where of course we default to default=italic)

i have no problem adding that (basically one can even go as far as
disabling every mapping assuming pure unicode input but i guess that
users then would still ask for \mathfoo commands)

and of course we need more math fonts that have monospace (one is in the
making in the gyre project)

Hans

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