修補其他巨集中定義的本機命令

Question

這是後續問題，分別是導致此處（尚未）未回答的問題的主要原因：\xpatchcmd 定義套用於未定義指令時的宏

我嘗試修補一些命令，例如，，\someothercommand它是在另一個巨集中本地定義的，例如，\somecommand在後面的巨集之外，例如在序言中。

然而這失敗了。補丁跳到錯誤的分支。我懷疑，這與本地分組有某種聯繫。

可能發生這種情況的一種情況是，當人們想要修補潛伏在其他巨集內部（例如類別或套件檔案中）的巨集定義時。

考慮一些情況壞的應更改程式碼，而無需複製整個外部巨集或編輯.cls或.sty文件

是否可以修補此類本地定義的巨集？

我簡化了 MWE

\documentclass{article}
\usepackage{xcolor}
\usepackage{xpatch}

\newcommand{\somecommand}[1]{%
  \newcommand{\someothercommand}[1]{\textcolor{blue}{##1}}%
  % This works
  % \xpatchcmd{\someothercommand}{blue}{red}{\typeout{Success!}}{\typeout{Nobody expects the Spanish Inquisition!!!!}}
  Inside usage: \someothercommand{#1}%
}

% Patching fails 
\xpatchcmd{\someothercommand}{blue}{red}{\typeout{Success!}}{\typeout{Nobody expects the Spanish Inquisition!!!!}}


\begin{document}
\somecommand{Outer command}

Outside usage: \someothercommand{Inside} but should be \textcolor{red}{Inside}
\end{document}

Answer 1

我會尋找一個合適的地方來\somecommand放置掛鉤：

\documentclass{article}
\usepackage{xcolor}
\usepackage{xpatch}

\newcommand{\somecommand}[1]{%
  \def\someothercommand##1{\textcolor{blue}{##1}}%
  Inside usage: \someothercommand{#1}%
}


\xpatchcmd{\somecommand}{Inside usage:}{Inside usage: \myspecialsetup}{\typeout{Success!}}{\typeout{Nobody expects the Spanish Inquisition!!!!}}

\newcommand\myspecialsetup{\renewcommand\someothercommand[1]{\textcolor{red}{##1}}}

\begin{document}
\somecommand{Outer command}
\end{document}

Answer 2

您只能修補已定義的命令，因此\somecommand這裡：

\documentclass{article}
\usepackage{xcolor}
\usepackage{xpatch}

\newcommand{\somecommand}[1]{%
  \newcommand{\someothercommand}[1]{\textcolor{blue}{##1}}%
  % This works
  % \xpatchcmd{\someothercommand}{blue}{red}{\typeout{Success!}}{\typeout{Nobody expects the Spanish Inquisition!!!!}}
  Inside usage: \someothercommand{#1}%
}

% Patching works 
\xpatchcmd{\somecommand}{blue}{red}{\typeout{Success!}}{\typeout{Nobody expects the Spanish Inquisition!!!!}}


\begin{document}
\somecommand{Outer command}

Outside usage: \someothercommand{Inside} but should be \textcolor{red}{Inside}
\end{document}