adjustwidth and newenvironment

Question

Edit: thank you for commenting. I've edited the question to use lstnewenvironment but it keeps giving the same error. I will keep the question here while I go read the lstlistings manual.

The following code works for me when used inside the document:

\begin{adjustwidth*}{0pt}{-5cm}
\begin{lstlisting}
function test() { return (void *) test_func(a, b, 3); }
\end{lstlisting}
\end{adjustwidth*}

But when I want to create a custom environment for it, Overleaf gives me the error

job aborted, no legal \end found.

MWE:

\documentclass{article}
\usepackage[right=10cm]{geometry}    % Create a large right margin
\usepackage{listings}
\usepackage{changepage}
% Create a new environment for code samples that can extend into the outer margin.
\lstnewenvironment{config}{%
   \begin{adjustwidth}{0pt}{-5cm}
}{%
   \end{adjustwidth}
}
\begin{document}
\begin{config}
function test() { return (void *) test_func(a, b, 3); } asdfasdfa asdf
\end{config}
\end{document}

The problematic part here is not the adjustwidth environment but lstlisting. \newenvironment{config}{\begin{lstlisting}}{\end{lstlisting}} causes the same error message that you observewith your original definition of the config environment. — leandriis, Jul 21 '20 at 07:08
In order to create a new environment containing a lstlisting, the listings package offers \lstnewenvironment. See also: lstlisting in a newenvironment — leandriis, Jul 21 '20 at 07:09

score 1 · Accepted Answer · answered Jul 21 '20 at 09:31

Apparently, changepage and listings fight each other. However, you don't need changepage for this application.

\documentclass{article}
\usepackage[right=10cm]{geometry}    % Create a large right margin
\usepackage{listings}
\usepackage{lipsum}
% Create a new environment for code samples that can extend into the outer margin.
\lstnewenvironment{config}[1][]{\lstset{xrightmargin=-5cm,#1}}{}
\lstset{basicstyle=\ttfamily,columns=fullflexible} % so my eyes don't bleed
\begin{document}
\lipsum[1][1-4]
\begin{config}
function test() { return (void *) test_func(a, b, 3); } asdfasdfa asdf
\end{config}
\end{document}

You can add listings options to config in the usual way, by calling `\begin{config}[]

adjustwidth and newenvironment

1 Answers1