Allow to remap the mathematical hyphen ("2010) to the same glyph as the minus sign ("002D")

[nagmat84]

Description

The range option allows to remap certain unicode ranges to use glyph from an alternative range in the font, e.g. range={tt/{latin,Latin}->up} maps monospaced symbols to upright symbols. It would be nice to have this option as a generic feature or at least for some additional special symbols, at least the math hyphen.

Add info or delete as appropriate:

• Relevant for XeTeX: yes
• Relevant for LuaTeX: yes
• Issue tracker has been searched for similar issues: yes
• https://tex.stackexchange.com/q/528843/47156

Minimal example demonstrating the issue

\documentclass{article}

\usepackage{libertinus} % Set the same teletype font for text, \mathtt and \symtt \setmonofont{Inconsolatazi4-Regular.otf}[Scale=MatchLowercase] \setmathtt{Inconsolatazi4-Regular.otf}[Scale=MatchLowercase] \setmathfont{Inconsolatazi4-Regular.otf}[range={tt/{latin,Latin}->up},Scale=MatchLowercase]

% I hoped the following line would do the trick, but it only triggers a compilation error % \setmathfont{Inconsolatazi4-Regular.otf}[range={tt/{latin,Latin}->up,"2010->"002D},Scale=MatchLowercase]

\begin{document} \begin{tabular}{lcc}\hline & \texttt{\textbackslash mathhyphen} & normal \texttt{-} \\hline \texttt{\textbackslash mathrm} & $\mathrm{init\mathhyphen cmd}$ & $\mathrm{init-cmd}$ \ \texttt{\textbackslash mathsf} & $\mathsf{init\mathhyphen cmd}$ & $\mathsf{init-cmd}$ \ \texttt{\textbackslash mathit} & $\mathit{init\mathhyphen cmd}$ & $\mathit{init-cmd}$ \ \texttt{\textbackslash mathtt} & $\mathtt{init\mathhyphen cmd}$ & $\mathtt{init-cmd}$ \\hline \end{tabular} \end{document}

Further details

The problem occurs, if one maps a certain stylistic Unicode math range (tt, frak, bb, cal, scr) from the U+1D4xx range to an different font which has the required symbols but in their "normal" ASCII slots.

[ArchangeGabriel]

Sorry to be a bit out of topic, but I’ve never realized that U+2010 was used as a “mathematical hyphen”. Do you have an example of its use as such? (I’m interested in typography were U+2010 is quite important as inter‐word hyphen, and I’m curious about other uses)

[nagmat84]

One uses a mathematical hyphen quite often in theoretical computer science, especially in the field of complexity theory and cryptography. So called reduction games very often use multi-word superscripts with words being separated by hyphens. For example $\symcal{O}^{\mathsf{ind\mathhyphen cca\mathhyphen 2}}$, for an oracle (in the sense of complexity theory) which answers an IND-CCA-2 challenge.

Opposed to mathematicians, computer science theorists tend not to use single letter variables, but "telling" names and there the mathematical hyphens comes in very handy.

[wspr]

Thanks for the suggestion. I agree it should be a good feature to introduce “arbitrary” remappings like this. Of course it wouldn’t be very useful to the vast majority of possibilities, but there are a few cases where the glyph you want is in another slot than the input character.

Sorry, I won’t be able to implement this quickly...

[nagmat84]

OK, thanks for considering the idea. I understand that this feature request might have low priority and take its time. However, are you aware of a quick (and dirty) workaround?

With traditional LaTeX I did not had the problem (\mathhyphen worked as expeced), but then I had to switch to LuaLaTeX and unicode-math for some other reason. Hence, this problem is some kind of personal regression for me and there is a paper deadline. :(

I already tried to define some own special-purpose macro like \mathhyphenforconsolate using \DeclareMathSymb which simply maps to "002D but uses math class \mathord. But I failed. In order not to clutter this thread, might I ask you to post your answer at the referred TeX StackExchange question (see above)?

[wspr]

For a quick fix, could you make a personal copy of unicode-math-table.tex and add/change another entry in it?