我使用软件包版本来管理我的测试和答案的多个类似版本。我希望能够对它们进行颜色编码，这样我就可以在查看单个输出的同时轻松比较每个版本。我尝试创建包含的新命令\begin{TestA}\end{TestA}，但当排除该版本时，我无法编译文档。我尝试的代码是
\newcommand{\ta}[1]{\begin{testA} \textcolor{blue}{#1} \end{testA}}
\newcommand{\tb}[1]{\begin{testB}\textcolor{green}{#1}\end{testB}}
当我使用
\includeversion{testA}和\excludeversion{testB}
我收到错误消息
Extra \fi.
对于我使用后的行\tB{insert text for version B here}
我正在寻找一种不需要我\textcolor{blue}在每次开始文档中的新版本时都添加的东西，这样当我去打印所需的测试版本时，我可以通过在一个地方更改颜色轻松地将所有内容切换为黑色。
总代码可能是：
\documentclass{article}
\usepackage{xcolor}%to use the colors
\usepackage{versions}
\newcommand{\ta}[1]{\begin{testA} \textcolor{blue}{#1} \end{testA}}%This way I can see what is in version A in the compiled document by turning it blue (This works when version A is included as above)
\newcommand{\tb}[1]{\begin{testB}\textcolor{green}{#1}\end{testB}} %this is to make version B show up green so I can compare both at a glance but when B is not included I get the error message from above
\includeversion{testA}%included so everything in test A will show up
\excludeversion{testB} %excluded so that version B does not show up
\begin{document}
This text is for both versions
\ta{This is just for version A}
\tb{This is just for version B}
This is for both again
\end{document}
答案1
您无需创建新的宏，而是可以使用钩子为现有环境添加一些颜色：
\documentclass{article}
\usepackage{xcolor}%to use the colors
\usepackage{versions}
\AddToHook{env/testA/begin}{\color{blue}}
\AddToHook{env/testB/begin}{\color{green}}
\includeversion{testA}%included so everything in test A will show up
\excludeversion{testB} %excluded so that version B does not show up
\begin{document}
This text is for both versions
\begin{testA}
This is just for version A
\end{testA}
\begin{testB}
This is just for version B
\end{testB}
This is for both again
\end{document}
答案2
文档指出（第 2 页）
然而，
\begin{〈version〉}...\end{〈version〉}宏观论证内部存在断裂，例如\footnote（它甚至很脆弱）。因此，有\processifversion{〈version〉}{〈code〉}类似的工作（分组也是如此），依赖于\excludeversion等等（它甚至很强大）。
因此，如果你想使用宏而不是环境，你需要使用\processifversion
\documentclass{article}
\usepackage{xcolor}
\usepackage{versions}
\includeversion{testA}
\excludeversion{testB}
\newcommand{\ta}[1]{\processifversion{testA}{\textcolor{blue}{#1}}}
\newcommand{\tb}[1]{\processifversion{testB}{\textcolor{green}{#1}}}
\begin{document}
This text is for both versions
\ta{This is just for version A}
\tb{This is just for version B}
This is for both again
\end{document}
