I want a simple way to have:
\reverseit{abc defg \mycommand}
yield
\mycommand gfed cba
?
(Yes, the original motivation is related to Hebrew and RTL languages, but that can sort of be solved using \beginR ... \endR/\beginL ... \endL where necessary without changing the language. So I'm asking the general question.)
Edit: The solution in this question is acceptable as a non-LaTeX-3 solution...
\documentclass{article}
\usepackage{xparse}
\ExplSyntaxOn
\NewDocumentCommand\reverseit { m }
{ \tl_reverse:n { #1 } }
\ExplSyntaxOff
\begin{document}
\reverseit{abc defg \LaTeX}
\end{document}
This also honors spaces.
\tl_reverse_items:n, which does not honor spaces, and puts braces around every item, but is much faster (100 times?). --- Sorry, didn't see that there were spaces in Eyal's example.
– Bruno Le Floch
Jan 6 '12 at 12:25
