LaTeX：重新定义加星号命令

发布于 2024-08-24 10:09:07 字数 509 浏览 6 评论 0原文

我想重新定义 \part* 命令，以便它自动添加内容行。事实证明这很困难，因为我想在我的加星号版本中重用原始的 \part* 命令。

通常（即对于未加星号的命令）我会这样做：

\let\old@part\part
\renewcommand\part[2][]{
  \old@part[#1]{#2}
  … rest of definition}

也就是说，我会将 \part 的原始定义保存在 \old@part 中并使用它。

但是，这不适用于带星号的命令，因为它们没有定义单个词位（与上面示例中的 \part 命令不同）。这归结为以下问题：如何保存加星号的命令？

请注意，我已经知道如何使用 \WithSuffix 命令重新定义加星号的命令本身后缀包。这不是问题。

原文

I want to redefine the \part* command so that it automatically adds a contents line. This proves difficult since I want to reuse the original \part* command inside my starred version.

Normally (i.e. for unstarred commands) I would do it like this:

\let\old@part\part
\renewcommand\part[2][]{
  \old@part[#1]{#2}
  … rest of definition}

That is, I would save the original definition of \part in \old@part and use that.

However, this doesn’t work for starred commands since they don’t define a single lexeme (unlike the \part command in the example above). This boils down to the following question: How can I save a starred command?

Notice that I already know how to redefine a starred command itself, using the \WithSuffix command from the suffix package. This isn’t the problem.

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拒绝两难 2024-08-31 10:09:07

没有 \part* 命令。发生的情况是 \part 命令查看其后面的下一个字符（使用 \@ifstar），然后分派到其他两个例程之一，该例程基于以下内容执行实际工作：关于那里是否有星号。

参考：TeX FAQ 条目使用 * 选项定义的命令

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音盲 2024-08-31 10:09:07

感谢@smg 的回答，我拼凑出了一个完美运行的解决方案。这是完整的源代码，以及解释性注释：（

% If this is in *.tex file, uncomment the following line.
%\makeatletter

% Save the original \part declaration
\let\old@part\part

% To that definition, add a new special starred version.
\WithSuffix\def\part*{
  % Handle the optional parameter.
  \ifx\next[%
    \let\next\thesis@part@star%
  \else
    \def\next{\thesis@part@star[]}%
  \fi
  \next}

% The actual macro definition.
\def\thesis@part@star[#1]#2{
  \ifthenelse{\equal{#1}{}}
   {% If the first argument isn’t given, default to the second one.
    \def\thesis@part@short{#2}
    % Insert the actual (unnumbered) \part header.
    \old@part*{#2}}
   {% Short name is given.
    \def\thesis@part@short{#1}
    % Insert the actual (unnumbered) \part header with short name.
    \old@part*[#1]{#2}}

  % Last, add the part to the table of contents. Use the short name, if provided.
  \addcontentsline{toc}{part}{\thesis@part@short}
}

% If this is in *.tex file, uncomment the following line.
%\makeatother

这需要包 suffix 和 ifthen。）

现在，我们可以使用它：

\part*{Example 1}
This will be an unnumbered part that appears in the TOC.

\part{Example 2}
Yes, the unstarred version of \verb/\part/ still works, too.

Thanks to @smg’s answer, I’ve cobbled together a solution that works perfectly. Here’s the complete source, along with explanatory comments:

% If this is in *.tex file, uncomment the following line.
%\makeatletter

% Save the original \part declaration
\let\old@part\part

% To that definition, add a new special starred version.
\WithSuffix\def\part*{
  % Handle the optional parameter.
  \ifx\next[%
    \let\next\thesis@part@star%
  \else
    \def\next{\thesis@part@star[]}%
  \fi
  \next}

% The actual macro definition.
\def\thesis@part@star[#1]#2{
  \ifthenelse{\equal{#1}{}}
   {% If the first argument isn’t given, default to the second one.
    \def\thesis@part@short{#2}
    % Insert the actual (unnumbered) \part header.
    \old@part*{#2}}
   {% Short name is given.
    \def\thesis@part@short{#1}
    % Insert the actual (unnumbered) \part header with short name.
    \old@part*[#1]{#2}}

  % Last, add the part to the table of contents. Use the short name, if provided.
  \addcontentsline{toc}{part}{\thesis@part@short}
}

% If this is in *.tex file, uncomment the following line.
%\makeatother

(This needs the packages suffix and ifthen.)

Now, we can use it:

\part*{Example 1}
This will be an unnumbered part that appears in the TOC.

\part{Example 2}
Yes, the unstarred version of \verb/\part/ still works, too.

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