Passing (just) other options, when using pgfopts

Question

I want to use pgfopts (and therefore pgfkeys) when customizing a class with new options, keeping the old ones, and using some of them.

Here is a simplified example with a class "exa" which extends "article" with a new option, and also sets option "a5paper".

\begin{filecontents}{exa.cls}
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{exa}[2014/03/19 exa]
% As "article" with "a5paper" set, and an extra option "lastword".
\RequirePackage{pgfopts}
\pgfkeys{
  /exa/.cd,
  lastword/.code=\AtEndDocument{\par The last word is #1.}
}
\ProcessPgfOptions{/exa}
\PassOptionsToClass{a5paper}{article}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
\ProcessOptions
\LoadClass{article}
\end{filecontents}

\documentclass[lastword=bar,twocolumn]{exa}

\usepackage{blindtext}
\begin{document}
\blindtext
\end{document}

The three options work as intended here; "a5paper" set by the class, "twocolumn" sent to "article", and the new option "lastword". But it gives a warning about unused global option ["lastword=bar]".

How can take away all options ProcessPgfOptions took care of, so that only the rest is sent on to "article"?

On my machine with updated TeXLive 2013 it is working nicely. — Claudio Fiandrino, Mar 19 '14 at 14:18
Welcome to TeX.SX! If @ClaudioFiandrino is right about the issue, you might want to look at How do I update my TeX distribution? — Adam Liter, Mar 19 '14 at 14:33
Do you really mean you don't get that warning? (I also use TeXLive 2013.) That would surprise me, because I don't think it's strange I got that warning. — pst, Mar 19 '14 at 17:17

score 8 · Accepted Answer · answered Mar 23 '14 at 12:13

You're mixing the two methods for setting options, which results in the warning.

\begin{filecontents}{exa.cls}
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{exa}[2014/03/19 exa]
% As "article" with "a5paper" set, and an extra option "lastword".
\RequirePackage{pgfopts}

%%% initialize the options
\def\exa@classoptions{a5paper}

\pgfkeys{
  /exa/.cd,
  lastword/.code=\AtEndDocument{\par The last word is #1.},
  %%% unknown keys are assumed to be options to be passed to the class
  .unknown/.code={\edef\exa@classoptions{\exa@classoptions,\pgfkeyscurrentname}}
}
\ProcessPgfOptions{/exa}
\LoadClass[\exa@classoptions]{article}

\end{filecontents}

\documentclass[lastword=bar,twocolumn]{exa}

\usepackage{lipsum}
\begin{document}
\lipsum[1-10]
\end{document}

Passing (just) other options, when using pgfopts

1 Answers1

Linked