[texhax] listings options

[Lars Madsen]

Neal H. Walfield wrote, On 2012-01-03 15:54:
> Hi,
> 
> I'm using the listings package to typeset some code.  I have some
> short snippets that I'm including inline and some longer examples that
> I put in floats.  I want to apply different options to each of these.
> For instance, I want the floating listings to have line numbers, but
> the inline listings shouldn't.  Further, the inline listings should be
> slightly indented, but the floating listings shouldn't be.
> 
> I thought I'd do the following:
> 
>   \usepackage{listings}
>   \newcommand{\lstfloatsettings}{float, numbers=left}
>   \newcommand{\lstinlinesettings}{xleftmargin=4ex, xrightmargin=4ex}
>   \lstset{
>     columns=fullflexible,
>     % Don't use visible spaces in strings.
>     showstringspaces=false,
>     basicstyle=\small,
>     captionpos=b,
>     frame=single,
>   }
> 
> But, that doesn't work:
> 
>   \begin{lstlisting}[\lstfloatsettings, label=lst:example]
>   ...
>   \end{lstlisting}
> 
> => 
> 
>   ! Package keyval Error: float, numbers=left undefined.
>   
>   See the keyval package documentation for explanation.
>   Type  H <return>  for immediate help.
>    ...  
> 
> Any ideas or suggestions for a better approach?
> 
> Thanks,
> 
> Neal
> 

because of the expansion you canno store listings keys in macros. Use 
listings styles instead, i.e.

\lstdefinestyle{mystyle}{
key-vals
}

and then use it via style=mystyle

very handy

-- 

/daleif