添加标签并引用修改后的列表环境

Question

我想标记并引用修改后的列表环境，即 Matlab Code 和 Matlab Output。但是，当我添加命令\label并尝试引用标记的修改列表环境时，我得到的??是我不想要的结果。下面是我的 MWE，这是 @Tom 针对我的问题提供的解决方案，位于多个列表条目分类错误：

\documentclass[openany]{book}
\usepackage{regexpatch}
\usepackage[nottoc]{tocbibind}
\usepackage{caption}
\usepackage{listings}
\usepackage{hyperref}


% --------------------------------------- C++
\newcommand{\lstlistmatlaboutputname}{List of Matlab Output}
\newcommand{\lstlistofmatlaboutput}{\begingroup
    \tocfile{\lstlistmatlaboutputname}{loc}
    \endgroup}
% --------------------------------------- R
\newcommand{\lstlistmatlabcodename}{List of Matlab Code}
\newcommand{\lstlistofmatlabcode}{\begingroup
    \tocfile{\lstlistmatlabcodename}{lor}
    \endgroup}
% --------------------------------------- Pseudocode
\newcommand{\lstlistpseudocodename}{List of Pseudocode}
\newcommand{\lstlistofpseudocode}{\begingroup
    \tocfile{\lstlistpseudocodename}{lop}
    \endgroup}

\makeatletter
\lstnewenvironment{matlaboutput}[1][]{%
    \renewcommand{\lstlistingname}{Matlab Output}%
    \renewcommand{\ext@lstlisting}{loc}%
    %\xpatchcmd*{\caption@ORI@lst@MakeCaption}{lol}{loc}{}{}% use this with earlier version caption package
    \lstset{language=C++,#1}}%
{}

\lstnewenvironment{matlabcode}[1][]{%
    \renewcommand{\lstlistingname}{Matlab Code}%
    \renewcommand{\ext@lstlisting}{lor}%
    %\xpatchcmd*{\caption@ORI@lst@MakeCaption}{lol}{lor}{}{}% use this with earlier version caption package
    \lstset{language=R,#1}}
{}

\lstnewenvironment{pseudocode}[1][]{%
    \renewcommand{\lstlistingname}{Pseudocode}%
    \renewcommand{\ext@lstlisting}{lop}%
    %\xpatchcmd*{\caption@ORI@lst@MakeCaption}{lol}{lop}{}{}% use this with earlier version caption package
    \lstset{basicstyle=\ttfamily,#1}}%
{}
\makeatother

\begin{document}
    
    \lstlistofmatlaboutput
    \lstlistofmatlabcode    
    \lstlistofpseudocode
    
    \chapter{Listings}
    \begin{matlaboutput}[caption = {Some class definition}]\label{outp:1}
        % example matlab output
    \end{matlaboutput}
    
    \begin{matlabcode}[caption = {For educational purposes}]\label{code:1}
        % example matlab code 1
    \end{matlabcode}

See Output \ref{outp:1} and Code \ref{code:1} above.

\end{document}

Answer 1

您应该将label参数用于 listings 环境，而不是尝试在其中设置\label。后者可以做到，但必须正确转义，并且通常是指行号而不是整个环境。

\documentclass[openany]{book}
\usepackage{regexpatch}
\usepackage[nottoc]{tocbibind}
\usepackage{caption}
\usepackage{listings}
\usepackage{hyperref}


% --------------------------------------- C++
\newcommand{\lstlistmatlaboutputname}{List of Matlab Output}
\newcommand{\lstlistofmatlaboutput}{\begingroup
    \tocfile{\lstlistmatlaboutputname}{loc}
    \endgroup}
% --------------------------------------- R
\newcommand{\lstlistmatlabcodename}{List of Matlab Code}
\newcommand{\lstlistofmatlabcode}{\begingroup
    \tocfile{\lstlistmatlabcodename}{lor}
    \endgroup}
% --------------------------------------- Pseudocode
\newcommand{\lstlistpseudocodename}{List of Pseudocode}
\newcommand{\lstlistofpseudocode}{\begingroup
    \tocfile{\lstlistpseudocodename}{lop}
    \endgroup}

\makeatletter
\lstnewenvironment{matlaboutput}[1][]{%
    \renewcommand{\lstlistingname}{Matlab Output}%
    \renewcommand{\ext@lstlisting}{loc}%
    %\xpatchcmd*{\caption@ORI@lst@MakeCaption}{lol}{loc}{}{}% use this with earlier version caption package
    \lstset{language=C++,#1}}%
{}

\lstnewenvironment{matlabcode}[1][]{%
    \renewcommand{\lstlistingname}{Matlab Code}%
    \renewcommand{\ext@lstlisting}{lor}%
    %\xpatchcmd*{\caption@ORI@lst@MakeCaption}{lol}{lor}{}{}% use this with earlier version caption package
    \lstset{language=R,#1}}
{}

\lstnewenvironment{pseudocode}[1][]{%
    \renewcommand{\lstlistingname}{Pseudocode}%
    \renewcommand{\ext@lstlisting}{lop}%
    %\xpatchcmd*{\caption@ORI@lst@MakeCaption}{lol}{lop}{}{}% use this with earlier version caption package
    \lstset{basicstyle=\ttfamily,#1}}%
{}
\makeatother

\begin{document}

    \lstlistofmatlaboutput
    \lstlistofmatlabcode
    \lstlistofpseudocode

    \chapter{Listings}
    \begin{matlaboutput}[caption = {Some class definition},label={outp:1}]
        % example matlab output
    \end{matlaboutput}

    \begin{matlabcode}[caption = {For educational purposes},label={code:1}]
        % example matlab code 1
    \end{matlabcode}

See Output \ref{outp:1} and Code \ref{code:1} above.

\end{document}