在 IEEEtran v1.8a 中从列表边距中排除标题

Question

我有以下设置列表包，包括一个左边距以使行号保持在列内。

\documentclass{article}

\usepackage{color}
\usepackage[final]{listings}
\lstset{
language=Python,
numbers=left,
xleftmargin=2em,
frame=single,
captionpos=b,
basicstyle=\ttfamily\scriptsize,
breaklines=true,
tabsize=3,
numberbychapter=false,
keywordstyle=\bfseries\color{blue}
}

\begin{document}

\begin{lstlisting}[caption={This could be a very long description. In real life, my document is in two-column so I have even less space for the listing caption.}]
def foo():
    bar()
\end{lstlisting}

\end{document}

这对于文章类。但是，我必须使用 IEEE Transactions 类 v1.8（例如这里：http://cruise.eecs.uottawa.ca/models2015/resources/IEEEtran.cls）但是当我用IEEEtran在上面的例子中，我得到了一个超出列宽的列表标题。

Answer 1

不同之处在于\@makecaption类的末尾IEEEtran没有显式\par。TeX 在段落末尾评估段落参数。\par后面是后 \@makecaption选项设置xleftmargin生效。

以下示例\par在末尾添加了一个显式\@makecaption：

\documentclass{IEEEtran}

\usepackage{etoolbox}

\makeatletter
\apptocmd\@makecaption{\par}{}{%
  \errmessage{\noexpand\@makecaption could not be patched}%
}
\makeatother

\usepackage{color}
\usepackage[final]{listings}
\lstset{
  language=Python,
  numbers=left,   
  xleftmargin=2em,
  frame=single,   
  captionpos=b,
  basicstyle=\ttfamily\scriptsize,
  breaklines=true,
  tabsize=3,
  numberbychapter=false,
  keywordstyle=\bfseries\color{blue}
}

\begin{document}

\begin{lstlisting}[caption={This could be a very long description. In real
life, my document is in two-column so I have even less space for the listing
caption.}]
def foo():
    bar() 
\end{lstlisting}

\end{document}