Inside my lstlisting environment I want to make the assignment symbol an arrow instead of =. How can I do that? Adding just \leftarrow doesn't work, because then the whole word is displayed.
[Tex/LaTex] Make arrows inside lstlisting
arrowslistingssourcecode
Related Solutions
(This answer is based on a previous answer of mine from another problem : my previous answer)
The solution is to use the literate option within the lsset command. I modified your code (note that you need only enter $ and not \$ in the actual code listing. For visual purposes, I included a coloring for the $ but you may change it to suit your needs.
\documentclass[12pt,oneside,a4paper]{scrartcl}
\usepackage{textcomp}
\usepackage{listings}
\usepackage{color}
\definecolor{lightgray}{rgb}{.9, .9, .9}
\definecolor{darkgray}{rgb}{.4, .4, .4}
\definecolor{purple}{rgb}{0.65, 0.12, 0.82}
\lstdefinelanguage{JavaScript}{
keywords={typeof, new, true, false, catch, function, return, null, catch, switch, var, if, in, while, do, else, case, break},
keywordstyle=\color{blue}\bfseries,
ndkeywords={class, export, boolean, throw, implements, import, this},
ndkeywordstyle=\color{darkgray}\bfseries,
identifierstyle=\color{black},
sensitive=false,
comment=[l]{//},
morecomment=[s]{/*}{*/},
commentstyle=\color{purple}\ttfamily,
stringstyle=\color{red}\ttfamily,
morestring=[b]',
morestring=[b]"}
\lstset{
language=JavaScript,
backgroundcolor=\color{lightgray},
extendedchars=true,
basicstyle=\footnotesize\ttfamily,
showstringspaces=false,
showspaces=false,
numbers=left,
numberstyle=\footnotesize\ttfamily,
numbersep=9pt,
tabsize=2,
breaklines=true,
showtabs=false,
frame=leftline,
caption=\lstname,
literate={\$}{{\textcolor{blue}{\$}}}1
}
\begin{document}
\begin{lstlisting}[name=Beispiel mit JavaScript Bibliothek (jQuery)]
$("p").elements.each(function() {
$(this).html = "Element erkannt";
});
\end{lstlisting}
\end{document}
The result is
use it this way:
\documentclass{beamer}
\usepackage{listings}
\lstset{
language=Java,
tabsize=8,
keepspaces,
extendedchars=true,
rulecolor=\color{black},
basicstyle=\footnotesize,
aboveskip=5pt,
upquote=true,
columns=fixed,
showstringspaces=false,
extendedchars=true,
breaklines=true,
frame=single,
showtabs=true,
showspaces=false,
showstringspaces=false,
}
\begin{document}
\defverbatim\lst{%
\begin{lstlisting}
public class Teddy {
public MethodName(String name, int var) {
this.name = name;
}
}
\end{lstlisting}
}
\begin{frame}
\lst
\end{frame}
\end{document}
Best Answer
As requested by Jubobs, here is a simple document elaborating on the comments, showing how to use math literals to use
\leftarrowfor assignment in alstlistingsenvironment.Preamble
Here, we use
\lstsetto change the settings for alllstlistingenvironments in the document. You could put these options in the argument to an individual argument if you prefer. I've set the columns tofullflexiblefor the sake of presentation, and added keywords because I haven't chosen any language. The settingmathescape=truewill allow us to use math-mode to typeset special character combinations.The list of 'literates' (note: no commas separating the items in the list!) tells
listingshow to typeset special character combinations. Here, assignment (=) is being typeset with\leftarrow, and equality testing (==) is being typeset with the equality symbol. The{}after the symbols is necessary for correct spacing in thefullflexiblecolumn option: it has no effect withfixed. Note the comma after the last literal, before themorekeywordsoption.Sample document
Output