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使用 \colorlet 命令时未定义颜色

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使用 \colorlet 命令时未定义颜色

我有以下代码运行正常：

\documentclass[letterpaper,10pt]{article}
\usepackage[english,german]{babel}
\usepackage{xcolor}
\usepackage{boolexpr,pdftexcmds,trace}

\definecolor{mediumtealblue}{rgb}{0.0, 0.33, 0.71}
\definecolor{red(munsell)}{rgb}{0.95, 0.0, 0.24}
\definecolor{forestgreen}{rgb}{0.13, 0.55, 0.13}
\definecolor{ginger}{rgb}{0.69, 0.4, 0.0}

\makeatletter
    \long\def\isequal#1#2{\pdf@strcmp{#1}{#2}}
\makeatother

\providecommand{\denoun}[3][---]{%
    \def\Artikel{#1}%
    \def\colornoun{}%
    \switch%
        \case{\isequal{\Artikel}{der}}%
            \renewcommand{\colornoun}[1]{\textcolor{mediumtealblue}{##1}}%
        \case{\isequal{\Artikel}{die}}%
            \renewcommand{\colornoun}[1]{\textcolor{red(munsell)}{##1}}%
        \case{\isequal{\Artikel}{das}}%
            \renewcommand{\colornoun}[1]{\textcolor{forestgreen}{##1}}%
        \otherwise%
            \renewcommand{\colornoun}[1]{\textcolor{black}{##1}}%
    \endswitch%
    \colornoun{#1 #2} & \textcolor{ginger}{die #3} \\%
}

\begin{document}

    \begin{tabular}{|c|c|}
        \hline
            \multicolumn{2}{|c|}{Nouns in german} \\
        \hline
            \denoun[der]{Apfel}{Äpfel}
            \denoun[die]{Katze}{Katzen}
            \denoun[das]{Beispiel}{Beispiele}
        \hline
    \end{tabular}
    
\end{document}

来自第一个代码的表格。

然后我想也许我可以修改\denoun命令来得到如下结果：

\documentclass[letterpaper,10pt]{article}
\usepackage[english,german]{babel}
\usepackage{xcolor}
\usepackage{boolexpr,pdftexcmds,trace}

\definecolor{mediumtealblue}{rgb}{0.0, 0.33, 0.71}
\definecolor{red(munsell)}{rgb}{0.95, 0.0, 0.24}
\definecolor{forestgreen}{rgb}{0.13, 0.55, 0.13}
\definecolor{ginger}{rgb}{0.69, 0.4, 0.0}

\begin{document}

    \begin{tabular}{|c|c|}
        \hline
            \multicolumn{2}{|c|}{Nouns in german} \\
        \hline
            \textcolor{mediumtealblue}{der Apfel} & \colorbox{mediumtealblue}{\textcolor{white}{die Äpfel}} \\
            \textcolor{red(munsell)}{die Katze} & \colorbox{red(munsell)}{\textcolor{white}{die Katzen}} \\
            \textcolor{forestgreen}{das Beispiel} & \colorbox{forestgreen}{\textcolor{white}{die Beispiele}} \\
        \hline
    \end{tabular}
    
\end{document}

所需的表。

所以我尝试修改\denoun命令如下：

\documentclass[letterpaper,10pt]{article}
\usepackage[english,german]{babel}
\usepackage{xcolor}
\usepackage{boolexpr,pdftexcmds,trace}

\definecolor{mediumtealblue}{rgb}{0.0, 0.33, 0.71}
\definecolor{red(munsell)}{rgb}{0.95, 0.0, 0.24}
\definecolor{forestgreen}{rgb}{0.13, 0.55, 0.13}
\definecolor{ginger}{rgb}{0.69, 0.4, 0.0}

\makeatletter
    \long\def\isequal#1#2{\pdf@strcmp{#1}{#2}}
\makeatother

\providecommand{\denoun}[3][---]{%
    \def\Artikel{#1}%
    \switch%
        \case{\isequal{\Artikel}{der}}%
            \colorlet{nouncolor}{mediumtealblue}%
        \case{\isequal{\Artikel}{die}}%
            \colorlet{nouncolor}{red(munsell)}%
        \case{\isequal{\Artikel}{das}}%
            \colorlet{nouncolor}{forestgreen}%
        \otherwise%
            \colorlet{nouncolor}{black}%
    \endswitch%
    \textcolor{nouncolor}{#1 #2} & \colorbox{nouncolor}{\textcolor{white}{die #3}} \\%
}

\begin{document}

    \begin{tabular}{|c|c|}
        \hline
            \multicolumn{2}{|c|}{Nouns in german} \\
        \hline
            \denoun[der]{Apfel}{Äpfel}
            \denoun[die]{Katze}{Katzen}
            \denoun[das]{Beispiel}{Beispiele}
        \hline
    \end{tabular}
    
\end{document}

但随后我收到以下错误消息：

! 包 xcolor 错误：未定义颜色‘nouncolor’。

所以我想知道我犯了什么错误？或者还有其他方法可以做到这一点吗？

我将非常感谢您的回答，谢谢！

答案1

您可以使用它\globalcolorstrue来使颜色定义变得全局化。

但我会避免一直测试参数并重置颜色。我会先定义它们并按名称使用它们：

\documentclass[letterpaper,10pt]{article}
\usepackage[english,german]{babel}
\usepackage{xcolor}
\usepackage{boolexpr,pdftexcmds,trace}

\definecolor{mediumtealblue}{rgb}{0.0, 0.33, 0.71}
\definecolor{red(munsell)}{rgb}{0.95, 0.0, 0.24}
\definecolor{forestgreen}{rgb}{0.13, 0.55, 0.13}
\definecolor{ginger}{rgb}{0.69, 0.4, 0.0}


\colorlet{dernouncolor}{mediumtealblue}
\colorlet{dienouncolor}{red(munsell)}
\colorlet{dasnouncolor}{forestgreen}

\providecommand{\denoun}[3][---]{%
    \xglobal\providecolor{#1nouncolor}{named}{black}%
    \textcolor{#1nouncolor}{#1 #2} & \colorbox{#1nouncolor}{\textcolor{white}{die #3}} 
    \\%
}

\begin{document}

    \begin{tabular}{|c|c|}
        \hline
            \multicolumn{2}{|c|}{Nouns in german} \\
        \hline
            \denoun[der]{Apfel}{Äpfel}
            \denoun[die]{Katze}{Katzen}
            \denoun[das]{Beispiel}{Beispiele}
            \denoun[blub]{Beispiel}{Beispiele}
        \hline
    \end{tabular}

\end{document}

在此处输入图片描述

答案2

问题是，\switch一旦&达到，就会丢失，因为每个表格单元都是在自己的组中构思的。解决方案是全局定义\switch（我在中这样做\getnouncolor），并根据需要在每个单元中调用它。

\documentclass[letterpaper,10pt]{article}
\usepackage[english,german]{babel}
\usepackage{xcolor}
\usepackage{boolexpr,pdftexcmds,trace}

\definecolor{mediumtealblue}{rgb}{0.0, 0.33, 0.71}
\definecolor{red(munsell)}{rgb}{0.95, 0.0, 0.24}
\definecolor{forestgreen}{rgb}{0.13, 0.55, 0.13}
\definecolor{ginger}{rgb}{0.69, 0.4, 0.0}

\makeatletter
    \long\def\isequal#1#2{\pdf@strcmp{#1}{#2}}
\makeatother

\providecommand{\denoun}[3][---]{%
    \gdef\getnouncolor{%
    \def\Artikel{#1}%
    \switch%
        \case{\isequal{\Artikel}{der}}%
            \colorlet{nouncolor}{mediumtealblue}%
        \case{\isequal{\Artikel}{die}}%
            \colorlet{nouncolor}{red(munsell)}%
        \case{\isequal{\Artikel}{das}}%
            \colorlet{nouncolor}{forestgreen}%
        \otherwise%
            \colorlet{nouncolor}{black}%
    \endswitch%
    }
    \getnouncolor\textcolor{nouncolor}{#1 #2} & 
    \getnouncolor\colorbox{nouncolor}{\textcolor{white}{die #3}} \\%
}

\begin{document}

    \begin{tabular}{|c|c|}
        \hline
            \multicolumn{2}{|c|}{Nouns in german} \\
        \hline
            \denoun[der]{Apfel}{Äpfel}
            \denoun[die]{Katze}{Katzen}
            \denoun[das]{Beispiel}{Beispiele}
        \hline
    \end{tabular}
    
\end{document}

在此处输入图片描述

答案3

有一个更简单的解决方案，无需切换大小写（好吧，我们只需要应对两种情况）：将参数作为颜色名称的一部分。

\documentclass[letterpaper,10pt]{article}
\usepackage[T1]{fontenc}
\usepackage[english,german]{babel}
\usepackage{xcolor}
\usepackage{etoolbox}

\definecolor{mediumtealblue}{rgb}{0.0, 0.33, 0.71}
\definecolor{red(munsell)}{rgb}{0.95, 0.0, 0.24}
\definecolor{forestgreen}{rgb}{0.13, 0.55, 0.13}
\definecolor{ginger}{rgb}{0.69, 0.4, 0.0}
\colorlet{dercolor}{mediumtealblue}
\colorlet{diecolor}{red(munsell)}
\colorlet{dascolor}{forestgreen}
\colorlet{---color}{black}

\newcommand{\denoun}[3][---]{%
  \textcolor{#1color}{#1 #2} &
  \maybecolorbox{#1}{#3\vphantom{Äp}} \\
}
\newcommand{\maybecolorbox}[2]{%
  \ifstrequal{#1}{---}{#2}{\colorbox{#1color}{\textcolor{black}{#2}}}%
}

\begin{document}

\begin{tabular}{|c|c|}
\hline
\multicolumn{2}{|c|}{Nouns in german} \\
\hline
\denoun[der]{Apfel}{Äpfel}
\denoun[die]{Katze}{Katzen}
\denoun[das]{Beispiel}{Beispiele}
\denoun{Foo}{Foo}
\hline
\end{tabular}
    
\end{document}

在此处输入图片描述

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