`showexpl` doesn't work with accents

Question

It seems that showexpl removes the accents when it is processing them.

How can I make it to use accented letters?

Is there a replacement or a similar package that is more robust?

\documentclass{article}
\usepackage[T1]{fontenc}

\usepackage{listings}
\usepackage{showexpl}
\lstset {
  literate=%
    {á}{{\'{a}}}1
    {é}{{\'{e}}}1
    {í}{{\'{i}}}1
    {ó}{{\'{o}}}1
    {ú}{{\'{u}}}1
    {ñ}{{\~{n}}}1
    {Ñ}{{\~{N}}}1
}

\begin{document}

\begin{lstlisting}
  á é í ó ú a e i o u
\end{lstlisting}

\begin{LTXexample}
  á é í ó ú a e i o u
\end{LTXexample}

\end{document}

Answer 1

showexpl has to write the code to a temporary file. It uses an internal command of listings for this. But accent doesn't survive if you use the literate option too. Put the code in some external file and then use

\LTXinputExample{test-code}

Answer 2

Run xelatex and everything will be fine without using the literate option:

\documentclass{article}
\usepackage{fontspec}
\setmonofont[Scale=0.88]{DejaVu Sans Mono}
\usepackage{listings}
\usepackage{showexpl}
\begin{document}

\begin{lstlisting}
áéíóúaeiou
\end{lstlisting}

\begin{LTXexample}
áéíóúaeiou
\end{LTXexample}

\end{document}