Text Formatting ⇒ Include colored code in listing's caption?

[fcpjanc]

Hello, community,

I am trying to write a short summary of basic loop functions used in visual basic for my fellow students. I have found the listings package to color the keywords and have already defined all the parameters and additional keywords. I am also using the inline listings for faster and easier writing.

Now, I would like to include such inline listings in another listings caption, like so:

Code: Select all

\documentclass{book}

\usepackage{listings}
\usepackage[dvipsnames]{xcolor}

\lstset{ language=[Visual]Basic,  
keywordstyle=\color{blue}, commentstyle=\color{ForestGreen}, stringstyle=\color{Maroon},
basicstyle=\ttfamily\normalsize,  
frame=lines, showspaces=false, showstringspaces=false,  
tabsize=3,
aboveskip=10pt,
belowskip=10pt,
lineskip=3pt,  
numbers=left, numberstyle=\tiny, stepnumber=1, numbersep=5pt  
morekeywords={Or, Loop, Until, To, As, Single, Module, Console, Double, ByVal}}

\lstMakeShortInline[basicstyle=\ttfamily\normalsize]{\|}

\begin{document}

Here, we can see an example of the |If| loop implementation with the |ElseIf| and |Else| statements.

\begin{lstlisting}[caption={|If| loop with |Else If| and |Else|},label=ifloop]  
If <cond> Then  
    <code>  
ElseIf <cond> Then  
    <code>  
Else  
    <code>  
End If  
\end{lstlisting}  

\end{document}

The error I am getting is:

Code: Select all

! Argument of \lst@temp has an extra }.
<inserted text> 
                \par 
l.24 ...p with |Else If| and |Else|},label=ifloop]

I hope I have described the problem thoroughly and will be very happy for any tips.

Cheers,
Stefan

[cgnieder]

Verbatim commands like \verb, \lstinline and also shortcuts like | in your case can't be used in arguments of other macros. I'd suggest to define some command

Code: Select all

\newcommand\keyword[1]{\textcolor{blue}{\ttfamily#1}}

and use it like

Code: Select all

\begin{lstlisting}[caption={\keyword{If} loop with \keyword{Else If} and \keyword{Else}},label=ifloop]
...
\end{lstlisting}

Regards

[cgnieder]

Ok, I have been proven wrong for this specific case. Please, next time read our board rules first which clearly state that you should provide a direct link if you make a crossposting.

Regards

[Stefan Kottwitz]

To have the solution also noted here, it can be done using \lstinline, as Heiko Oberdiek wrote in the linked topic. Some special characters such as braces need to be escaped by a preceding backslash, if required.

Code: Select all

\begin{lstlisting}[
  caption={\lstinline|If| loop with \lstinline|Else\ If| and \lstinline|Else|},
  label=ifloop]

listing.png (9.5 KiB) Viewed 4012 times

Stefan