forarray and a \gdef list parameter

Question

\documentclass{article}
\usepackage{forarray}
\begin{document}
  \newcommand{\mytext}[1]{\gdef\themytext{#1}}
  \newcommand{\mytest}[1]{\ForEach{,}{\typeout{\thislevelitem}}{#1}}

  % this one works, it prints
  % x
  % y
  % z
  \mytest{x,y,z}

  % this one doesn't work, it prints
  % x,y,z
  \mytext{x,y,z}
  \mytest{\themytext}

\end{document}

This is a simplified example of an issue I'm facing writing a LaTeX class file. I can't get \ForEach to work when the list parameter comes via a global macro definition.

How can I modify the definition of \mytex so that the example works?

Thanks

Answer 1

This works for me:

\documentclass{article}
\usepackage{forarray}
\begin{document}
  \newcommand{\mytext}[1]{\gdef\themytext{#1}}
  \newcommand{\mytest}[1]{\ForEachX{,}{\typeout{\thislevelitem}}{#1}}

  % this one works, it prints
  % x
  % y
  % z
  \mytest{x,y,z}

  % this one works, it prints
  % x
  % y
  % z
  \mytext{x,y,z}
  \mytest{\themytext}

\end{document}

Notice the use of \ForEachX, which expands the third argument, instead of \ForEach.

Answer 2

If you are willing to modify how you call \mytest, then

\expandafter\mytest\expandafter{\themytext}

gives

x

y

z

or you could define \mytest differently

\makeatletter
  \newcommand{\mytest}[1]{\edef\mylist{#1}%
    \expandafter\@mytest\expandafter{\mylist}}%
  \newcommand{\@mytest}[1]{\ForEach{,}{\typeout{\thislevelitem}}{#1}}
\makeatother