Re: Plain TeX writer

["Vít Novotný" <witiko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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Dne čtvrtek 20. října 2022 v 10:06:23 UTC+2 uživatel Bastien Dumont napsal:

> I don't understand either the rationale for \pandocSpace and 
> \pandocLinebreak. Since Markdown and TeX agree on handling simple line 
> breaks and repeated spaces like single spaces, in what cases would it be 
> useful?


I was going to give an example of a Word document with the text 
*Hello␣␣␣world!* and show that it would produce the output *Hello 
\pandocSpace{}\pandocSpace{}\pandocSpace{}world!*, which would allow us to 
preserve the repeated spaces. Howover, running *pandoc -i example.docx -t 
pandoc-to-markdown.lua* produces *Hello\pandocSpace{}world!* as the output. 
This indicates that not only Markdown and TeX fold repeated spaces, but 
Pandoc's AST in general does. In that case, it seems reasonable to replace 
*\pandocSpace{}* with *␣* and *\pandocLineBreak{}* with *⤶* in the TeX 
output as John also suggested.

Thanks to the package xkeyval, the key-value argument could be handled 
> quite easily in all formats that include Plain TeX.
>

The xkeyval package is one option. I am partial to the expl3 programming 
language <https://www.ctan.org/pkg/l3kernel> from the LaTeX3 project, which 
provides many programming extensions to TeX, including key--value 
interfaces (see the l3keys module in the LaTeX3 Interface Documentation 
<http://mirrors.ctan.org/macros/latex/contrib/l3kernel/interface3.pdf>). 
However, some would call the syntax of expl3 arcane.

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