[texhax] listings.sty question: how to implement single-spacing

[Ulrike Fischer]

Am Tue, 16 Jun 2009 17:41:49 +0200 schrieb martin f krafft:

> Hey folks,
> 
> I am using the wonderful listings.sty to typeset my code listings
> for my thesis. Since I am using (have to use) double-spacing for the
> flow text, I'd like to ensure single-spacing for listings to
> conserve space, and because it actually increases the readability.
> 
> My attempts thus far have been foiled. The following does not work,
> even though I can happily define the new environment with with
> \lstnewenvironment if I don't try to use the singlespace environment
> in its "constructor" and "destructor":
> 
>   \documentclass{article}
>   \usepackage{listings,setspace}
>   \lstnewenvironment{mylisting}
>   {\begin{singlespace}\lstset{language=pascal}}
>   {\end{singlespace}}
>   \begin{document}
>   \begin{mylisting}
>   for i:=maxint to 0 do
>   begin
>   { do nothing }
>   end;
>   \end{mylisting}
>   \end{document}
> 
> This gives me:
> 
>   % latex l.tex
>   This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)
>   [...]
>   Package: `setspace' 6.7 <2000/12/01>
>   ) (./l.aux) (/usr/share/texmf-texlive/tex/latex/listings/lstlang1.sty)
>   (/usr/share/texmf-texlive/tex/latex/base/omscmr.fd))
>   *
>    ^--- cursor just stays here and I am in TeX command mode
> 
> Do you have any idea how to make it do what I want?

There is no need to use an environment. Use the command:

\documentclass{article}
  \usepackage{listings,setspace}
  \doublespacing %for test
  \lstnewenvironment{mylisting}
  {\singlespacing\lstset{language=pascal}}
  {}
  \begin{document}
  \begin{mylisting}
  for i:=maxint to 0 do
  begin
  { do nothing }
  end;
  \end{mylisting}
  
  a\\b
  \end{document}



-- 
Ulrike Fischer