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ifthenelse 错误

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ifthenelse 错误

代码

\newcommand{\variableBackgroundColor}{%
\ifthenelse{1=1}%\(\boolean{Colle} \OR \boolean{DM}\)}
%then
    {black!10!white}
%else   
    {white}
}


\tcolorboxenvironment{private_exo}{boxrule=0pt,
                                   colframe=white,
                                   colback=\variableBackgroundColor,
                                   breakable,
                                   top=0pt,
                                   bottom=0pt,
                                   left=0pt,
                                   right=0pt,
                                   left skip=0pt,
                                   right skip=0pt,
                                   boxsep=0pt,
                                   sharp corners,
                                   noparskip,
                                   nobeforeafter,
                                   %parbox=false,
                                   }

引发错误

! 不完整 \iffalse；第 107 行之后的所有文本均被忽略。\fi

我是否遗漏了一些明显的知识（我正在学习）？

答案1

colback想要颜色规范，但颜色规范\ifthenelse{1=1}{black!10!white}{white}没有。出现但这种\ifthenelse构造并不能通过“纯扩展”来实现。

使用不同的布尔表达式管理器，例如etoolbox：在\usepackage{etoolbox}构造之后

colback=\ifnumcomp{1}{=}{1}{black!10!white}{white}

也

colback=\variableBackgroundColor

可以\newcommand{\variableBackgroundColor}{\ifnumcomp{1}{=}{1}{black!10!white}{white}} 。

允许的关系是<，=或>。etoolbox有关更多信息，请参阅手册。

\documentclass{article}
\usepackage[most]{tcolorbox}
\usepackage{etoolbox}

\newcommand{\variableBackgroundColor}{%
  \ifnumcomp{1}{=}{1}{black!10!white}{white}%
}

\newenvironment{private_exo}{}{}

\tcolorboxenvironment{private_exo}{
  boxrule=0pt,
  colframe=white,
  colback=\variableBackgroundColor,
  breakable,
  top=0pt,
  bottom=0pt,
  left=0pt,
  right=0pt,
  left skip=0pt,
  right skip=0pt,
  boxsep=0pt,
  sharp corners,
  noparskip,
  nobeforeafter,
  %parbox=false,
}

\begin{document}

\begin{private_exo}
abc
\end{private_exo}

\end{document}

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