我只有一个问题。我的if 条件不起作用。我不知道为什么。以下是 if 条件：
\ifthenelse{\boolean{somevariable}}{split dir tree auto,}{} %IF ABFRAGE FUNKTIONIERT NICHT
我设置了\setboolean{somevariable}{false}，所以我的输出应该是 {}，表示空。
\documentclass[11pt,a4paper,titlepage,bibliography=totoc,numbers=noenddot,abstract=on,multi,dvipsnames,svgnames,x11names]{scrreprt}
\usepackage{storebox}
\usepackage[edges]{forest}
\usepackage{adjustbox}
\usepackage{ifthen}
\newboolean{somevariable}
\setboolean{somevariable}{false}
%Zeilenumbruch in der tikz Umgebung!
% addaswyd o gôd Sašo Živanović: http://tex.stackexchange.com/a/296771/
\def\hiddenparcommand{\par}
\newcommand\otherhiddenparcommand{\par\noindent}
\newcommand\hiddencommacommand{, }
\forestset{%
declare keylist register={split here ids},% the list of nodes to split the tree at
split here ids={},
declare keylist register={split here interjects},% the list of comments to put in between the tree parts
split here interjects={},
declare keylist={split here auto siblings}{},% a list to hold the siblings which need edge restoration
declare toks register=split here toks,
declare dimen register=tmpdima,
tmpdima'=0pt,
declare dimen register=tmpdimb,
tmpdimb'=0pt,
declare dimen register=tmpdimc,
tmpdimc'=0pt,
to widest/.style={
tikz+={\path (\forestregister{tempdima}, \forestoption{y}) -- (\forestregister{tempdimb}, \forestoption{y});},
},
hide commas/.style={%
split here toks+={\hiddencommacommand},
split here toks+={#1},
},
split dir tree pre/.style={%
label={[text=gray, anchor=north, font=\scriptsize]below:{[cont.]}{}},
},
split dir tree post/.style={%
label={[font=\scriptsize, anchor=south, text=gray]above:{[cont.]}{}},
},
split dir tree auto post/.style={% this gets applied to the first node after a break
split dir tree post,
tempkeylistc'={},
tmpdimb/.option=y,
for nodewalk={
while={
> ORw2+d _+d < On=! & {y}{tmpdimb}{##2-##1} {\textheight-#1} {n'}{1}%
}{
next,
tempkeylistc/.option=name
}%
}{},
% save the list
split here auto siblings/.register=tempkeylistc,
tikz+/.process={% this tries to redraw the edges to the following siblings
OOw2{edge}{id}%
{%
\path [##1] (!u.parent anchor |- .north) ++(\forestregister{folder indent},1ex) coordinate (before ##2) |- (.child anchor);
\edef\tempa{\foresteoption{split here auto siblings}}
\foreach \i in \tempa \path [##1] (before ##2) |- ({forest cs:\i.child anchor});
}%
},
},
split dir tree/.code={%
\forestset{%
draw tree stage/.style={
for root'={
tempdima/.min={%
>OOw2+d{x}{min x}{####1+####2}%
}{tree},
tempdimb/.max={%
>OOw2+d{x}{max x}{####1+####2}%
}{tree},
for tree={%
to widest,
},
},
tempcountb'=-1,
do until={%
strequal((split_here_ids),"")
}{%
tempkeylistb'={},
tempkeylista'={},
split register={split here ids}{,}{tempcounta,tempkeylistb+},
split register={split here interjects}{,}{temptoksa,tempkeylista+},
split here ids'/.register=tempkeylistb,
split here interjects'/.register=tempkeylista,
% Sašo Živanović: http://chat.stackexchange.com/transcript/message/28484520#28484520
for nodewalk={%
draw tree processing order/.style={%
filter={tree}{> ORw+n< OR> & {id}{tempcounta}{########1+1}{id}{tempcountb}}%
}%
}{},
for root'={draw tree},
TeX/.process={Rw{temptoksa}{\otherhiddenparcommand ####1\hiddenparcommand}},
tempcountb'/.register=tempcounta,
},
for nodewalk={%
draw tree processing order/.style={%
filter={tree}{>OR>{id}{tempcountb}}%
}%
}{},
for root'={draw tree},
},
}%
},
split dir here auto/.style n args=2{%
split dir tree pre,
!next node.split dir tree auto post=#2,
split here ids+/.option=id,
% !next node.split resume here ids+/.option=id,
split={#1}{,}{split here toks,hide commas},
split here interjects/.register=split here toks,
},
split dir tree auto/.style={%
split dir tree,
before drawing tree={%
tempdima/.max={y}{tree},
tempdimc/.register=tempdima,
tempdimd/.min={y}{tree},
tempdima-/.register=tempdimd,
tempdimb'=\textheight,
tmpdima'=10ex,
tmpdimc'=\pagetotal,
while={%
>RR>{tempdima}{tempdimb}%
}{%
for nodewalk={%
root',
until={%
> ROw2+d RRw2+d > {tempdimc}{y}{##1-##2} {tmpdima}{tmpdimc}{\textheight-##2-##1}%
}{next node},
previous node,
split dir here auto/.process={R_w2{tmpdima}{continued}{{##2}{##1}}},
next node,
tempdima/.option=y,
tempdimc/.register=tempdima,
tempdima-/.register=tempdimd,
tmpdima'=15ex,
tmpdimc'=0pt
}{},
},
},
},
}
%Zeilenumbruch in der tikz Umgebung! Ende
\begin{document}
\begin{forest}
for tree={
folder,
grow'=0,
fit=band,
},
\ifthenelse{\boolean{somevariable}}{split dir tree auto,}{} %IF ABFRAGE FUNKTIONIERT NICHT
[ XYZ
[ XYZ
[ XYZ,edge label={node[pos=0.75,above,font=\scriptsize]{1}}
[ XYZ,edge label={node[pos=0.75,above,font=\scriptsize]{1}}
]
]
]
]
\end{forest}
\end{document}
先感谢您。
答案1
问题是ifthen布尔值不可扩展（可扩展性在 TeX 中是一个奇怪的概念，并且有不同级别的可扩展性，请查看什么是扩张例如）。您需要使用在该上下文中可扩展的布尔样式。例如，以下代码不会引发错误，并且正在使用 提供的切换etoolbox：
\documentclass[11pt,a4paper,titlepage,bibliography=totoc,numbers=noenddot,abstract=on,multi,dvipsnames,svgnames,x11names]{scrreprt}
\usepackage{storebox}
\usepackage[edges]{forest}
\usepackage{adjustbox}
\usepackage{etoolbox}
\newtoggle{somevariable}
\togglefalse{somevariable}
%Zeilenumbruch in der tikz Umgebung!
% addaswyd o gôd Sašo Živanović: http://tex.stackexchange.com/a/296771/
\def\hiddenparcommand{\par}
\newcommand\otherhiddenparcommand{\par\noindent}
\newcommand\hiddencommacommand{, }
\forestset{%
declare keylist register={split here ids},% the list of nodes to split the tree at
split here ids={},
declare keylist register={split here interjects},% the list of comments to put in between the tree parts
split here interjects={},
declare keylist={split here auto siblings}{},% a list to hold the siblings which need edge restoration
declare toks register=split here toks,
declare dimen register=tmpdima,
tmpdima'=0pt,
declare dimen register=tmpdimb,
tmpdimb'=0pt,
declare dimen register=tmpdimc,
tmpdimc'=0pt,
to widest/.style={
tikz+={\path (\forestregister{tempdima}, \forestoption{y}) -- (\forestregister{tempdimb}, \forestoption{y});},
},
hide commas/.style={%
split here toks+={\hiddencommacommand},
split here toks+={#1},
},
split dir tree pre/.style={%
label={[text=gray, anchor=north, font=\scriptsize]below:{[cont.]}{}},
},
split dir tree post/.style={%
label={[font=\scriptsize, anchor=south, text=gray]above:{[cont.]}{}},
},
split dir tree auto post/.style={% this gets applied to the first node after a break
split dir tree post,
tempkeylistc'={},
tmpdimb/.option=y,
for nodewalk={
while={
> ORw2+d _+d < On=! & {y}{tmpdimb}{##2-##1} {\textheight-#1} {n'}{1}%
}{
next,
tempkeylistc/.option=name
}%
}{},
% save the list
split here auto siblings/.register=tempkeylistc,
tikz+/.process={% this tries to redraw the edges to the following siblings
OOw2{edge}{id}%
{%
\path [##1] (!u.parent anchor |- .north) ++(\forestregister{folder indent},1ex) coordinate (before ##2) |- (.child anchor);
\edef\tempa{\foresteoption{split here auto siblings}}
\foreach \i in \tempa \path [##1] (before ##2) |- ({forest cs:\i.child anchor});
}%
},
},
split dir tree/.code={%
\forestset{%
draw tree stage/.style={
for root'={
tempdima/.min={%
>OOw2+d{x}{min x}{####1+####2}%
}{tree},
tempdimb/.max={%
>OOw2+d{x}{max x}{####1+####2}%
}{tree},
for tree={%
to widest,
},
},
tempcountb'=-1,
do until={%
strequal((split_here_ids),"")
}{%
tempkeylistb'={},
tempkeylista'={},
split register={split here ids}{,}{tempcounta,tempkeylistb+},
split register={split here interjects}{,}{temptoksa,tempkeylista+},
split here ids'/.register=tempkeylistb,
split here interjects'/.register=tempkeylista,
% Sašo Živanović: http://chat.stackexchange.com/transcript/message/28484520#28484520
for nodewalk={%
draw tree processing order/.style={%
filter={tree}{> ORw+n< OR> & {id}{tempcounta}{########1+1}{id}{tempcountb}}%
}%
}{},
for root'={draw tree},
TeX/.process={Rw{temptoksa}{\otherhiddenparcommand ####1\hiddenparcommand}},
tempcountb'/.register=tempcounta,
},
for nodewalk={%
draw tree processing order/.style={%
filter={tree}{>OR>{id}{tempcountb}}%
}%
}{},
for root'={draw tree},
},
}%
},
split dir here auto/.style n args=2{%
split dir tree pre,
!next node.split dir tree auto post=#2,
split here ids+/.option=id,
% !next node.split resume here ids+/.option=id,
split={#1}{,}{split here toks,hide commas},
split here interjects/.register=split here toks,
},
split dir tree auto/.style={%
split dir tree,
before drawing tree={%
tempdima/.max={y}{tree},
tempdimc/.register=tempdima,
tempdimd/.min={y}{tree},
tempdima-/.register=tempdimd,
tempdimb'=\textheight,
tmpdima'=10ex,
tmpdimc'=\pagetotal,
while={%
>RR>{tempdima}{tempdimb}%
}{%
for nodewalk={%
root',
until={%
> ROw2+d RRw2+d > {tempdimc}{y}{##1-##2} {tmpdima}{tmpdimc}{\textheight-##2-##1}%
}{next node},
previous node,
split dir here auto/.process={R_w2{tmpdima}{continued}{{##2}{##1}}},
next node,
tempdima/.option=y,
tempdimc/.register=tempdima,
tempdima-/.register=tempdimd,
tmpdima'=15ex,
tmpdimc'=0pt
}{},
},
},
},
}
%Zeilenumbruch in der tikz Umgebung! Ende
\begin{document}
\begin{forest}
for tree={
folder,
grow'=0,
fit=band,
},
\iftoggle{somevariable}{split dir tree auto,}{} %IF ABFRAGE FUNKTIONIERT NICHT
[ XYZ
[ XYZ
[ XYZ,edge label={node[pos=0.75,above,font=\scriptsize]{1}}
[ XYZ,edge label={node[pos=0.75,above,font=\scriptsize]{1}}
]
]
]
]
\end{forest}
\end{document}