LaTeX.org

Before opening a ticket bug I'd like to make sure it is one indeed.

The code below says it all. \documentclass{minimal} \usepackage{expl3} \usepackage{amssymb} \ExplSyntaxOn \begin{document} \tl_set:Nn \bar{A} \tl_set:Nf \baz{\ensuremath{\mathcal{\bar}}} %\tl_set:Nx \baz{\ensuremath{\mathcal{\bar}}} % :Nx generates error \tl_set:Nn \bar{B} \baz % want \mathcal{A}, g...

cgnieder wrote:Why don't you just use LaTeX's \sb or expl3's \c_math_subscript_token?

Too obvious for me to see it. Thanks!

The example that follows says it all. \documentclass{minimal} \usepackage{expl3} \usepackage{xparse} \usepackage{amssymb} \ExplSyntaxOn \tl_set_rescan:Nnn \tl_matrix_elem {\char_set_catcode_math_subscript:n \_} %Wrong guess, apparently {\ensuremath{A_{ij}}} \NewDocumentCommand\matrixelem{}{\tl_matri...

It's odd the last piece of code I pasted (E arguments) no longer works on Linux. ! Undefined control sequence. l.19 \foo _{one}^{two} This is pdfTeX, Version 3.14159265-2.6-1.40.18 (TeX Live 2017) (preloaded format=pdflatex) restricted \write18 enabled. entering extended mode (./argE.tex LaTeX2e <20...

OK, thanks.

Maybe internal/public should be renamed private/public or internal/external or implementation/interface?

I would have thought the 'chars' in e{chars} or E{chars} would have been specified as '_^' rather than '^_' given the example that follows. I get it now... xparse.pdf: "returned data is a token list comprising one braced entry per key, ordered as for the key list in the argument specification....

Partial answers: If I need to describe \themacro\oarg{X}\marg{Y} I would say "option \meta{X} is... and argument \meta{Y} is ..." (see ltxdoc.pdf). However, if the option is of the form key=val, using \meta won't look right. I don't know how to typeset these for sure (if someone would like...

Ancillary question: I see



pop up in some of ctan's dtx. What is it, what pckg is it using?

Please help modify the pieces of code in CAPITAL letters to make this work. code.sty: % \begin{macrocode} \NeedsTeXFormat{LaTeX2e} \ProvidesPackage{foo} \usepackage{xparse} \ExplSyntaxOn % \end{macrocode} % Some internal: % \begin{macro}{NAME} % \begin{macrocode} \cs_new:Npn \ewann_impl:n #1 { (...