Questions tagged [active-characters]

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23
votes
3answers
4k views

Use Markdown-style formatting for bold and italic

I rather like the system here where *...* is italic, **...** is bold, and ***...*** is bold italic. Is it possible to do that in (La)TeX? A MWE that implements the first one: \documentclass{article} ...
4
votes
1answer
449 views

Character choice for csquotes active quotes

We all know csquotes and the multiple facilities it provides for displaying quotations and related content. One feature I'm particularly fond of are the active quotes, using \MakeAutoQuote. That's ...
4
votes
1answer
201 views

How can I use the ampersand (&) as a delineator for tabs in LaTeX3 (expl3)/xparse syntax?

This idea evolved from the question: How can I get a count of the optional arguments with xparse? Problem I cannot get the ampersand to function as a delineator (for tab stops) inside the \...
1
vote
1answer
486 views

Modify catcode in the preamble or in the \AtBeginDocument?

I want to modify the catcode of comma, with the following code \documentclass{article} \AtBeginDocument{% \catcode`\,=\active \protected\def,{...}% } \begin{document} a,b,c $a,b,c$. \end{document}...
7
votes
2answers
89 views

How can I conditionally designate an active quote in csquotes.cfg?

How can I conditionally designate an active quote in csquotes.cfg so that no error is produced if the same character is made into an active quote in the .cfg and the document's preamble? I have the ...
7
votes
2answers
287 views

'Missing \begin{document}' when using the \lowercase trick

Mostly for fun, I'm trying to make % comments manipulatable using the \lowercase trick. For some reason, I'm getting a strange (to me) error: ERROR: LaTeX Error: Missing \begin{document}. --- TeX ...
4
votes
1answer
276 views

Error in some rare circumstances: babel with french option after listings, active character in moving argument, code in listing across pages

Edit: I have edited my question which initially wrongly focused on labels. This question is related to Code in \lstlisting breaks document (compile error). Let us consider the following MWE: \...
3
votes
2answers
149 views

Make equality-sign automatically blue

I know that we can redefine inequality-signs such as \le by simply doing \let\oldle\le and \def\le{\mathrel{...}}. But I have no idea how to redefine the equality-sign =. So if I want to automatically ...
3
votes
1answer
846 views

How to make hyperref work with bibitem keys containing a colon and using babel french option?

As seen in this thread, the \cite command bugs when the selected language is French and a bibitem key contains a :, which is an active character in babel french. Indeed, concerned hyperlinks always ...
3
votes
1answer
55 views

How to use str_foldcase in the preamble without generating a missing begin document error

Edit Thanks to @PhelypeOleinik for pointing out the problem wasn't the \str_foldcase itself but the switch statement bodies trying to typeset text before the document has begun. The cognitive overload ...
1
vote
1answer
118 views

Babel shorthands not working with `beamer` class (quotation mark not recognized as active character)

For the German language the babel package defines a set of shorthand commands that I use quite often. They all start with a quotation mark (") which is redefined as an active character. In detail, I'm ...