How to use extended ASCII characters in the lstlisting environment?

Question

When using extended ASCII characters inside the lstlisting environment, i.e. those corresponding to codes 191 - 197 (literally: ┐, └, ┴, ┬, ├, ─, ┼), latex produces the following error:

Package inputenc Error: Unicode char �\lst@EC�\lst@EC� (U+2832C0)(inputenc) not set up for use with LaTeX. ├──

Is there any way to enable the use of such characters inside lstlisting? Using \usepackage[utf8x]{inputenc} instead of \usepackage[utf8]{inputenc} does not solve the problem.

Answer 1

Use pmboxdraw and the literate key for listings. In the documentation for pmboxdraw there is the full list with the LICR names.

\documentclass{article}
\usepackage{listings,pmboxdraw}

\lstset{
  basicstyle=\ttfamily,
  columns=fullflexible,
  keepspaces,
  literate=
  {┐}{\textSFiii}1%
  {└}{\textSFii}1%
  {┴}{\textSFvii}1%
  {┬}{\textSFvi}1%
  {├}{\textSFviii}{1}%
  {─}{\textSFx}1%
  {┼}{\textSFv}1,
}

\begin{document}

\begin{lstlisting}
a b c d e f g
┐ └ ┴ ┬ ├ ─ ┼
\end{lstlisting}

\end{document}