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如何使用 foreach 建立同義巨集？

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如何使用 foreach 建立同義巨集？

我需要許多帶有關鍵數字參考的宏的同義詞？如何使用 \foreach 標記作為 \newcommand 名稱？我希望透過產生和使用巨集 \hello、\hola 和 \bonjour （都具有下標 1）和 \world、\mundo 和 \monde （都具有下標 2）來用 MOCKUP 輸出取代實際輸出，因為同義詞均指相同的圖號。如果有更簡單的方法可以做到這一點，請展示。透過複製和編輯將它們全部拼寫出來是非常乏味的。

編譯：

bash$ for i in 1 2 3 4; do pdflatex MWE.tex ; done

來源：

% filename: MWE.tex

\documentclass[10pt,twoside]{book}

\usepackage{tikz}
\begin{document}

\begin{center}{\bf\LARGE MWE}\end{center}

\begin{figure}\tikz{\node at (0,0) {hello};}\caption{hello}\label{hello}\end{figure}
\begin{figure}\tikz{\node at (0,0) {world};}\caption{world}\label{world}\end{figure}

GOAL: produce synonymous variant macros referencing a key figure.\\\\

EXPECT:\\
{\bf key:} $hello_1$ {\bf variants:} $hola_1$ $bonjour_1$\\
{\bf key:} $world_2$ {\bf variants:} $mundo_2$ $monde_2$\\

MOCKUP:\\
% NOTICE: this exercises the loops needed, but how do I generate named macros?
% PROBLEM: \foreach defines \key and \variant so \newcommand can't reuse them.
% FAILURE: \expandafter\newcommand\csname\variant\endcsname{$\variant~\ref{\key}}
\foreach\key/\variants in {hello/{hola,bonjour},world/{mundo,monde}}{
    {\bf key:} $\key_{\ref{\key}}$ {\bf variants:}
    \foreach\variant in \variants{$\variant_{\ref{\key}}$\;} \\
}

ACTUAL:\\
TODO
% TODO uncomment these next two lines when the \newcommands work correctly.
%key: \hello variants: \hola \bonjour
%key: \world variants: \mundo \monde
\end{document}

答案1

TNX 用戶202729。 Python 解決方案完美運行。

首先是IDEAS.py的原始碼：

#!/usr/bin/env python3

(BS, OB, CB) = ("\\", "{", "}")
IDEAS = {
    "hello": {"hola", "bonjour"},
    "world": {"mundo", "monde"}
}

def newcommand(num, key, syn):
    print(
        BS      + "newcommand" +
        BS      + syn +
        OB + BS + "large " + syn +
        BS      + "raisebox{-2pt}" +
        OB + BS + "footnotesize" +
        BS      + "ref{" + key + "}" +
        CB + CB
    )

def synonyms(num, key):
    newcommand(num + 1, key, key)
    for syn in IDEAS[key]:
        newcommand(num + 1, key, syn)

for num, key in enumerate(IDEAS):
    synonyms(num, key)

然後命令列：

bash$ IDEAS.py > IDEAS.tex

然後乳膠：

\input{IDEAS}

答案2

一個問題是每次\foreach迭代都發生在自己的本地範圍內。
因此，根據 執行的定義\newcommand僅限於本地範圍，該範圍在迭代開始時打開 ，並在執行該定義期間的迭代\foreach結束時關閉。 我建議在暫存令牌寄存器中累積指令，其中分配是全域完成的，並在迭代完成時傳遞該寄存器的內容。您需要一些- 技巧來正確擴展 -“variable”巨集。\foreach
\newcommand\expandafter\foreach

可能下面的程式碼可以滿足您的要求：

% filename: MWE.tex

\documentclass[10pt,twoside]{book}

\newtoks\scratchtoks

\usepackage{tikz}
\begin{document}

\begin{center}{\bf\LARGE MWE}\end{center}

\begin{figure}\tikz{\node at (0,0) {hello};}\caption{hello}\label{hello}\end{figure}
\begin{figure}\tikz{\node at (0,0) {world};}\caption{world}\label{world}\end{figure}

GOAL: produce synonymous variant macros referencing a key figure.\\\\

EXPECT:\\
{\bf key:} $hello_1$ {\bf variants:} $hola_1$ $bonjour_1$\\
{\bf key:} $world_2$ {\bf variants:} $mundo_2$ $monde_2$\\

MOCKUP:\\
% NOTICE: this exercises the loops needed, but how do I generate named macros?
% PROBLEM: \foreach defines \key and \variant so \newcommand can't reuse them.
% FAILURE: \expandafter\newcommand\csname\variant\endcsname{$\variant~\ref{\key}}
\global\scratchtoks{\global\scratchtoks{}}%
\foreach\key/\variants in {hello/{hola,bonjour},world/{mundo,monde}}{%
    %---------------------------------------------------------------------------
    \global\scratchtoks\expandafter{%
      \the\expandafter\scratchtoks
          \expandafter\newcommand
          \csname\key\expandafter\expandafter\expandafter\endcsname
                     \expandafter\expandafter\expandafter{%
                     \expandafter\expandafter\expandafter$%
                     \expandafter\key
                     \expandafter_%
                     \expandafter{%
                     \expandafter\ref
                     \expandafter{\key}}$}%
    }%
    %---------------------------------------------------------------------------
    {\bf key:} $\key_{\ref{\key}}$ {\bf variants:}
    \foreach\variant in \variants{%
      %-------------------------------------------------------------------------
      \global\scratchtoks\expandafter{%
        \the\expandafter\scratchtoks
            \expandafter\newcommand
            \csname\variant\expandafter\expandafter\expandafter\endcsname
                       \expandafter\expandafter\expandafter{%
                       \expandafter\expandafter\expandafter$%
                       \expandafter\variant
                       \expandafter_%
                       \expandafter{%
                       \expandafter\ref
                       \expandafter{\key}}$}%
      }%
      %-------------------------------------------------------------------------
      $\variant_{\ref{\key}}$\;%
    }\\
}%
\the\scratchtoks

ACTUAL:\\
% TODO uncomment these next two lines when the \newcommands work correctly.
{\bf key:} \hello { \bf variants:} \hola\; \bonjour\;\\
{\bf key:} \world { \bf variants:} \mundo\; \monde\;\\
%\show\hello
%\show\hola
%\show\bonjour
%\show\world
%\show\mundo
%\show\monde
\end{document}

在此輸入影像描述

\cs_new:cpx或者，您可以使用 expl3來全域定義事物，而不是在令牌暫存器中累積：

% filename: MWE.tex

\documentclass[10pt,twoside]{book}
\usepackage{tikz}
\begin{document}

\begin{center}{\bf\LARGE MWE}\end{center}

\begin{figure}\tikz{\node at (0,0) {hello};}\caption{hello}\label{hello}\end{figure}
\begin{figure}\tikz{\node at (0,0) {world};}\caption{world}\label{world}\end{figure}

GOAL: produce synonymous variant macros referencing a key figure.\\\\

EXPECT:\\
{\bf key:} $hello_1$ {\bf variants:} $hola_1$ $bonjour_1$\\
{\bf key:} $world_2$ {\bf variants:} $mundo_2$ $monde_2$\\

MOCKUP:\\
% NOTICE: this exercises the loops needed, but how do I generate named macros?
% PROBLEM: \foreach defines \key and \variant so \newcommand can't reuse them.
% FAILURE: \expandafter\newcommand\csname\variant\endcsname{$\variant~\ref{\key}}
\ExplSyntaxOn
\foreach\key/\variants in {hello/{hola,bonjour},world/{mundo,monde}}{
    %---------------------------------------------------------------------------
    \cs_new:cpx{\key}
               {\c_math_toggle_token\exp_not:o {\key}\c_math_subscript_token{\exp_not:N\ref{\exp_not:o {\key}}}\c_math_toggle_token}
    %---------------------------------------------------------------------------
    {\bf key:}~\c_math_toggle_token\key\c_math_subscript_token{\ref{\key}}\c_math_toggle_token~{\bf variants:}~
    \foreach\variant in \variants{
      %-------------------------------------------------------------------------
      \cs_new:cpx{\variant}
                 {\c_math_toggle_token\exp_not:o {\variant}\c_math_subscript_token{\exp_not:N\ref{\exp_not:o {\key}}}\c_math_toggle_token}
      %-------------------------------------------------------------------------
      \c_math_toggle_token\variant\c_math_subscript_token{\ref{\key}}\c_math_toggle_token\;
    }\\
}
\ExplSyntaxOff

ACTUAL:\\
% TODO uncomment these next two lines when the \newcommands work correctly.
{\bf key:} \hello { \bf variants:} \hola\; \bonjour\;\\
{\bf key:} \world { \bf variants:} \mundo\; \monde\;\\
%\show\hello
%\show\hola
%\show\bonjour
%\show\world
%\show\mundo
%\show\monde
\end{document}

在此輸入影像描述

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