使用循环在序言中调用多个命令

Question

我想使用 for 循环在序言中调用多个命令，以便在代码中的不同位置定义命令的数量。到目前为止，我的代码如下所示：

\documentclass[10pt,a4paper]{article}
% Here could be a list, e.g. \list = {Definition/definition, Axiom/axiom, ...}
% ...
\usepackage{thmtools} % boxes

\newcommand\mythm[3]{%
        \declaretheorem[thmbox=M, within = section,]{#1}%
        \newenvironment{#2}[1][]{%
            \begin{#1}[##1]%
            #3%
            \normalfont%
        }%
        {\end{#1}}%
}

\mythm{Definition}{definition}{}
\mythm{Axiom}{axiom}{}
\mythm{Notation}{notation}{}
% ...
% Here could be a for-loop

\begin{document}
    \begin{definition}[titel]
        Ceterum censeo Carthaginem esse delendam.
    \end{definition}
\end{document}

我想在序言的开头创建一个列表（例如，\list = {Definition/definition,...}然后\mythm使用列表的内容调用（例如\foreach \x/\y in \list {\mythm{\x}{\y}{}）。我的问题是，我不知道该怎么做。我尝试使用不同的 for 循环语法，但这些实现都无法真正调用\mythm。有人可以帮我吗？

Answer 1

您只需几个步骤即可完成，但我看不到太大的收获。

\documentclass[10pt,a4paper]{article}
\usepackage{thmtools} % boxes

\NewDocumentCommand{\mythm}{mmm}{%
  % #1 = tag, #2 = environment name, #3 = body font selection
  \declaretheorem[
    thmbox=M,
    within=section,
    name=#1,
  ]{#2inner}
  \NewDocumentEnvironment{#2}{o}
   {% start
    \IfNoValueTF{##1}{\begin{#2inner}}{\begin{#2inner}[##1]}
    \normalfont
    \IfValueT{#3}{#3}%
   }
   {\end{#2inner}}
}
\NewDocumentCommand{\mythmslash}{>{\SplitArgument{2}{/}}m}{\mythm#1}
\NewDocumentCommand{\mythms}{>{\SplitList{,}}m}{\ProcessList{#1}{\mythmslash}}

\mythms{
  Definition/definition,
  Axiom/axiom,
  Notation/notation/\itshape
}

\begin{document}

\section{Title}

\begin{definition}[titel]
Ceterum censeo Carthaginem esse delendam.
\end{definition}

\begin{axiom}
Ceterum censeo Carthaginem esse delendam.
\end{axiom}

\begin{notation}[titel]
Ceterum censeo Carthaginem esse delendam.
\end{notation}

\end{document}

请注意，您的\newenvironment部分使可选的“标题”参数实际上是强制性的，而上面的代码实际上是可选的。

thmbox说实话，我从来不会用。

Answer 2

\clist_map_inline:nn以下是使用和\NewDocumentCommand的参数处理器的解决方案\SplitArgument。请注意，我\ifstrempty在您的宏中添加了一个测试，\mythm因为 定义的环境 \declaretheorem不喜欢传递空的可选参数。

\documentclass{article}
\usepackage{xparse} % only necessary if your LaTeX is older than 2020-10-01
\usepackage{etoolbox}           % for \ifstrempty
\usepackage{thmtools}           % for boxes

\newcommand{\mythm}[3]{%
  \declaretheorem[thmbox=M, within=section]{#1}%
  \newenvironment{#2}[1][]{%
      % The environments defined with \declaretheorem don't like being passed
      % an empty optional argument.
      \ifstrempty{##1}{\begin{#1}}{\begin{#1}[##1]}%
      #3\normalfont
  }%
  {\end{#1}}%
}

\ExplSyntaxOn
\NewDocumentCommand \defineTheorems { m }
  {
    \clist_map_inline:nn {#1} { \defineOneTheorem {##1} }
  }

\NewDocumentCommand \defineOneTheorem { > { \SplitArgument { 1 } { / } } m }
  { \mythm #1 { } }
\ExplSyntaxOff

\defineTheorems{Definition/definition, Axiom/axiom, Notation/notation}

\begin{document}

\section{A section}

\begin{definition}[titel]
  Ceterum censeo Carthaginem esse delendam.
\end{definition}

\begin{axiom}
  covfefe
\end{axiom}

\begin{axiom}[foo]
  The ``foo'' axiom.
\end{axiom}

\end{document}