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I am looking for \iftoggledefined{<toggle name>}{<true>}{<false>}. I checked the etoolbox documentation and did not see such a thing.

Based on Difference between \newbool and \newtoggle from etoolbox package, one could use \ifcsdef{etb@tgl@#1}, but if the etoolbox code was ever change this test would break. Thus, would prefer to use an offical macro if it exists.

Question:

Can I obtain the same output as the given MWE

ToggleA: Exists
ToggleB: Does Not Exist

without relying on the internal etb@tgl@#1 code of etoolbox.

Code:

\documentclass{article}
\usepackage{etoolbox}

\makeatletter
\newcommand{\iftoggledefined}[3]{\ifcsdef{etb@tgl@#1}{#2}{#3}}
\makeatother


\newtoggle{ToggleA}


\begin{document}
ToggleA: \iftoggledefined{ToggleA}{Exists}{Does Not Exist}


ToggleB: \iftoggledefined{ToggleB}{Exists}{Does Not Exist}
\end{document}
Peter Grill
  • 223,288

1 Answers1

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Since \newtoggle checks \ifcsdef{etb@tgl@#1}, I believe this is a safe test.

There's no code in the package to check for a toggle to be defined (it's the same with \newif of the kernel or \newboolean of ifthen) and I'm not sure what it would be useful for.

Make a feature request, in the meantime use the code you proposed (and rethink to its usefulness).

egreg
  • 1,121,712