\PassOptionsToClass{\CurrentOption} not working

Question

I get an error which I don't understand. I have the following cls-file called error.cls

\NeedsTeXFormat{LaTeX2e}                                            
\ProvidesClass{error}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{scrartcl}}  
\ProcessOptions\relax
% 
\LoadClass{scrartcl} 
\endinput

So e.g. if I start my LaTeX-file with

\documentclass[titlepage=true]{error}

then I should get a separate titlepage. But unfortunately, the compiling process stops calling /usr/local/texlive/2021/.../koma-script/tocbasic.sty

Here my TeX-File I am using:

% ------------------
%\documentclass[titlepage=true]{error} % not working
% Compiling stops with 
% /usr/local/texlive/2021/.../koma-script/tocbasic.sty
% ------------------
\documentclass{error}   
% working with \LoadClass[titlepage=true]{scrartcl} or 
% \LoadClass{scrartcl}in the error.cls file
% ------------------
\begin{document}
%
\subject{-- \LaTeX --} 
\title{--Titel--}
\subtitle{--Untertitel--}
\date{\today} 
\maketitle
\section{Abschnitt}
\subsection{Unterabschnitt}
Text
\end{document}

score 1 · Accepted Answer · answered Jun 03 '21 at 09:58

1

This works:

\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{error}
\DeclareOption*{\expandafter\PassOptionsToClass\expandafter{\CurrentOption}{scrartcl}}
\ProcessOptions\relax
%
\LoadClass{scrartcl}
\endinput

answered Jun 03 '21 at 09:58

egreg

1,121,712

More on the usage of \expandafter and examples can be found in the TeX-book or do you have other references? – Ulrich Jun 03 '21 at 16:18
@Ulrich There are many posts here. For instance When to use \edef, \noexpand and \expandafter? – egreg Jun 03 '21 at 16:22
Nice, worked for me too. But why is this needed now? it worked until the update from 01.06.2021?? – Cube707 Jun 05 '21 at 15:11
@Cube, the same happens with me and I was therefore surprised. Also in the book of Goosens et all there is no hint why. Would be nice to learn "why". – Ulrich Jun 07 '21 at 14:58
@egrep: I found a rather interesting and detailed explanation of \expandafter by Bechtolsheim in link – Ulrich Jun 07 '21 at 15:06
@Ulrich: https://github.com/latex3/latex2e/issues/580 – user187802 Jun 23 '21 at 12:14
I just updated my system and now it works "correctly", i.e. without the \expandafter – Ulrich Jun 23 '21 at 13:10

\PassOptionsToClass{\CurrentOption} not working

1 Answers1