prevent listings from breaking at % character

Question

The following listing of mangled method names works, but it breaks at the % character (for no apparent reason).

\begin{lstlisting}[breaklines, breakatwhitespace=false]
    @Exceptionnotificationdialog@ReportExceptionNotification$qqrx20System @UnicodeString83System@%Set$56Exceptionnotificationdialog@TExceptionNotificationOptiont1$i0$t1$i2$%r83System@%Set$56Exceptionnotificationdialog@TExceptionNotificaTY6J18n0Wfo24G1hyGAqTA
\end{lstlisting}

Output:

@Exceptionnotificationdialog@ReportExceptionNotification$qqrx20System @UnicodeString83System@% Set$56Exceptionnotificationdialog@TExceptionNotificationOptiont1$i0$t1$i2$ %r83System@% Set$56Exceptionnotificationdialog@TExceptionNotificaTY6J18n0Wfo24G1hyGAqTA

How do I stop lstlisting from breaking at the % character?

Answer 1

You can make the % a letter. But be aware that listings than can break nowhere (with exception of the space) in your example, as it won't break "words":

\documentclass{article}
\usepackage{listings}

\begin{document}

\begin{lstlisting}[breaklines, breakatwhitespace=false,alsoletter=\%]
    @Exceptionnotificationdialog@ReportExceptionNotification$qqrx20System @UnicodeString83System@%Set$56Exceptionnotificationdialog@TExceptionNotificationOptiont1$i0$t1$i2$%r83System@%Set$56Exceptionnotificationdialog@TExceptionNotificaTY6J18n0Wfo24G1hyGAqTA
\end{lstlisting}
\end{document}