stack.sty 和 \end{environment}

Question

我正在编写一个多级itemize列表环境，以简化在 Beamer 幻灯片中放置嵌套列表的过程，并且我希望它enumerate也支持列表。该mitemize环境应该按如下方式工作：

\begin{mitemize}
  \enumeratelist
  \mitem{1} Candidate Generation
  \mitem{2} From annotated data
  \mitem{2} Using heuristics from unannotated data
  \mitem{1} Connect the slots to create trees
  \mitem{1} Pruning and Sorting
  \mitem{2} Covering algorithm on annotated corpus
  \mitem{2} Sorting linkage specifications by structure
\end{mitemize}

其看起来应该如下所示：

我让这个包工作时遇到了一个问题：每当mitemize.sty尝试关闭一个enumerate或itemize列表时，都会出现一条错误消息：

\begin{itemize} on input line 104 ended by \end{itemize}.

或者

\begin{enumerate} on input line 504 ended by \end{enumerate}.

显然\Push{stackname}{itemize}\end{\Stack{stackname}} 与 不一样\end{itemize}。有什么办法可以解决这个问题：

\ProvidesPackage{mitemize}
\RequirePackage{stack}
\RequirePackage{ifthen}

\NewStack{mitemizeStack}{\empty}
\newcounter{mitemize@depth}

\newenvironment{mitemize}{
   \newcommand{\mitem}[1]{%
      \whiledo{\value{mitemize@depth}>##1}{%
     \end{\Stack{mitemizeStack}}%
     \Pop{mitemizeStack}%
     \addtocounter{mitemize@depth}{-1}%
      }%
      \whiledo{\value{mitemize@depth}<##1}{%
     \addtocounter{mitemize@depth}{1}%
     \Push{mitemizeStack}{itemize}
     \begin{itemize}%
      }%
      \item%
   }%
   \newcommand{\enumeratelist}{%
     \addtocounter{mitemize@depth}{1}%
     \Push{mitemizeStack}{enumerate}
     \begin{enumerate}%
   }%
}{
   \whiledo{\value{mitemize@depth}>0}{%
      \end{\Stack{mitemizeStack}}%
      \Pop{mitemizeStack}%
      \addtocounter{mitemize@depth}{-1}%
   }%
}

---

这是一个更简单的例子。输出是正确的，但我得到了错误\begin{itemize} on input line 7 ended by \end{itemize}.

\documentclass{article}
\usepackage{stack}
\NewStack{endenvstack}{\empty}
\begin{document}

\Push{endenvstack}{itemize}
\begin{itemize}
\item Foo
\item Bar
\item Baz
\end{\Stack{endenvstack}}

Text that comes after the list

\end{document}

Answer 1

我通过创建新命令来隐藏\end{enumerate}并\end{itemize}使用 csname 调用它们，从而获得了一个工作版本。

在我的最小示例中，其结果为：

\documentclass{article}
\usepackage{stack}

\newcommand{\wrapenditemize}{\end{itemize}}    %create a wrapper

\NewStack{endenvstack}{\empty}
\begin{document}

\Push{endenvstack}{wrapenditemize}             %the wrapper's name is pushed as normal text
\begin{itemize}
\item Foo
\item Bar
\item Baz
\csname\Stack{endenvstack}\endcsname           %the wrapper's name is popped as normal text
                                               %and then turned into a macro call
                                               %using \csname

Text that comes after the list

\end{document}