How to have free accents in `lstlisting`

Question

There are quite some questions about getting accents like è into the lstlisting environment. But I actually want to have a free floating accent. However, Latex always changes it to some other symbol so copy pasting the code will not work.

Here a MWE:

\documentclass{article}
\usepackage{listings}
\begin{document}
\begin{lstlisting}
    if(...)
\end{lstlisting}
\end{document}

Answer 1

You can use the upquote package:

\documentclass{article}
\usepackage{listings}
\usepackage{upquote}

\begin{document}
\begin{lstlisting}
    `if`(...)
\end{lstlisting}

\end{document}

For using BeraMono:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{beramono}
\usepackage{listings}
\usepackage{upquote}
\lstset{basicstyle=\ttfamily,columns=fullflexible}

\begin{document}
\begin{lstlisting}
    `if`(...)
\end{lstlisting}

\end{document}