在示例环境旁边添加垂直线

Question

我该如何在示例环境旁边添加一条垂直线，就像这篇文章中一样：示例环境？。我没有从那篇文章中复制环境的原因是，不可能（至少据我所知）标记和引用该环境。

\documentclass{memoir}
\usepackage[most]{tcolorbox}
\newcounter{testexample}
\usepackage{xparse}
\usepackage{lipsum}

\def\exampletext{Eksempel} % If English
\NewTColorBox[use counter=testexample]{testexamplebox}{O{}o}{%
% Example Frame Start
empty,% Empty previously set parameters
title={\exampletext\ \thetcbcounter: #1},% use \thetcbcounter to access the 
% Attaching a box requires an overlay
attach boxed title to top left,
% Ensures proper line breaking in longer titles
minipage boxed title,
% (boxed title style requires an overlay)
boxed title style={empty,size=minimal,toprule=0pt,top=4pt,left=3mm,overlay= 
{}},
coltitle=colexam,fonttitle=\bfseries, before=\par\medskip\noindent,parbox=false,boxsep=0pt,left=3mm,right=0mm,top=2pt,breakable,pad at break=0mm,
before upper=\csname @totalleftmargin\endcsname0pt, % Use instead of 
parbox=true. %This ensures parskip is inherited by box.
% Handles box when it exists on one page only
overlay unbroken={\draw[colexam,line width=5pt] ([xshift=-0pt]title.north 
west) -- ([xshift=-0pt]frame.south west); },
% Handles multipage box: first page
overlay first={\draw[colexam,line width=5pt] ([xshift=-0pt]title.north west) 
-- ([xshift=-0pt]frame.south west); },
% Handles multipage box: middle page
overlay middle={\draw[colexam,line width=5pt] ([xshift=-0pt]frame.north west) 
-- ([xshift=-0pt]frame.south west); },
% Handles multipage box: last page
overlay last={\draw[colexam,line width=5pt] ([xshift=-0pt]frame.north west) - 
- ([xshift=-0pt]frame.south west); },%
IfValueTF={#2}{#2}{},
}
\NewDocumentEnvironment{testexample}{O{}O{}}
{%
  \colorlet{colexam}{red!55!black} % Global example color
  \begin{testexamplebox}[#1][#2]
}{\end{testexamplebox}\endlist}

\begin{document}
\lipsum[1]
\begin{testexample}[Latin Text][label=ex:latintext]
\lipsum[2]
\end{testexample}
I'm here refering to example \ref{ex:latintext}
\end{document}

我想补充的是：

Answer 1

后面有一个拼写错误

parbox=true.

应该.是一个,

直到找到选项后的下一个代码后，才会执行其余代码,，因为第一个覆盖规范适用于未破损的框，而示例不在破损的框中，因此永远不会执行此代码。

更好的变体是使用borderline密钥，我稍后会更新。

\documentclass{memoir}
\usepackage[most]{tcolorbox}
\newcounter{testexample}
\usepackage{xparse}
\usepackage{lipsum}

\def\exampletext{Eksempel} % If English
\NewTColorBox[use counter=testexample]{testexamplebox}{O{}o}{%
% Example Frame Start
empty,% Empty previously set parameters
%enhanced,
title={\exampletext\ \thetcbcounter: #1},% use \thetcbcounter to access the 
% Attaching a box requires an overlay
attach boxed title to top left,
% Ensures proper line breaking in longer titles
minipage boxed title,
% (boxed title style requires an overlay)
boxed title style={empty,size=minimal,toprule=0pt,top=4pt,left=3mm,overlay={}},
coltitle=colexam,
fonttitle=\bfseries, 
before=\par\medskip\noindent,
boxsep=0pt,left=3mm,
right=0mm,top=2pt,
breakable,
pad at break=0mm,
before upper=\csname @totalleftmargin\endcsname0pt, % Use instead of 
parbox=true, %This ensures parskip is inherited by box.
% Handles box when it exists on one page only
overlay unbroken={\draw[colexam,line width=5pt] ([xshift=-0pt]title.north 
  west) -- ([xshift=-0pt]frame.south west); 
},
%Handles multipage box: first page
overlay first={\draw[colexam,line width=5pt] ([xshift=-0pt]title.north west) 
  -- ([xshift=-0pt]frame.south west); },
%Handles multipage box: middle page
overlay middle={\draw[colexam,line width=5pt] ([xshift=-0pt]frame.north west) 
  -- ([xshift=-0pt]frame.south west); },
% Handles multipage box: last page
overlay last={\draw[colexam,line width=5pt] ([xshift=-0pt]frame.north west) - 
  - ([xshift=-0pt]frame.south west); },%
IfValueTF={#2}{#2}{},
}
\NewDocumentEnvironment{testexample}{O{}O{}}
{%
  \colorlet{colexam}{red!55!black} % Global example color
  \begin{testexamplebox}[#1][#2]
}{\end{testexamplebox}\endlist}

\begin{document}
\lipsum[1]
\begin{testexample}[Latin Text][label=ex:latintext]
\lipsum[2]
\end{testexample}
I'm here refering to example \ref{ex:latintext}
\end{document}