如何在程式碼中使用傾斜文字？

Question

我有一個正在使用的程式碼

\begin{lstlisting} 
line1 
line2
line3
\end{lstlisting}

我想將 line1 和 line3 顯示為傾斜的。如何做到這一點？

Answer 1

您可以使用分隔符號：

\documentclass{article}
\usepackage{listings}

\lstdefinestyle{mystyle}{
  basicstyle = \ttfamily ,
  moredelim = [is][\itshape]{|}{|}
}

\begin{document}

\begin{lstlisting}[style=mystyle]
|line1 
line2|
line3
\end{lstlisting}

\end{document}

\begin{lstlisting}[style=mystyle]
|line1| 
line2
|line3|
\end{lstlisting}

Answer 2

根據複雜性，人們可以使用verbatimbox環境的可選參數來實現這一目標：

\documentclass{article}
\usepackage{verbatimbox,xcolor}
\begin{document}
\newcommand\formatting{%
\ifnum\theVerbboxLineNo=1\relax\slshape\fi%
\ifnum\theVerbboxLineNo=3\relax\slshape\fi%
}
\begin{verbbox}[\formatting]
line1 
line2
line3
\end{verbbox}
This is my code: \fbox{\theverbbox}

\renewcommand\formatting{%
\ifnum\theVerbboxLineNo=1\relax\slshape\fi%
\ifnum\theVerbboxLineNo=3\itshape\leavevmode%
  \smash{\rlap{\color{red!20}\rule[-\dp\strutbox]{27pt}{\baselineskip}}}\fi%
}
\begin{verbbox}[\formatting]
line1 
line2
line3
line4
\end{verbbox}
This is my revised code: \fbox{\theverbbox}
\end{document}