我的总体目标是创建一个包含所有 S 列的表。在调试时，我找到了这些最小示例，现在看来它们几乎太简单了。
按预期工作：
\documentclass{article}
\usepackage{siunitx}
\begin{document}
\begin{tabular}{Sc}
1&2\\
\end{tabular}
\end{document}
这失败带有一个相当模糊的错误信息：
\documentclass{article}
\usepackage{siunitx}
\begin{document}
\begin{tabular}{Sc}
\input{\jobname-example_content.tex}
\end{tabular}
\end{document}
错误信息：
! Extra }, or forgotten $.
<recently read> }
l.11 \end
{tabular}
I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.
! Extra }, or forgotten $.
<argument> ...{\scan_stop: \c_math_toggle_token }}
l.11 \end
{tabular}
I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.
! Missing $ inserted.
<inserted text>
$
l.11 \end
{tabular}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
! Missing } inserted.
<inserted text>
}
l.11 \end
{tabular}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
! Missing } inserted.
<inserted text>
}
l.11 \end
{tabular}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
! Missing control sequence inserted.
<inserted text>
\inaccessible
l.11 \end
{tabular}
Please don't say `\def cs{...}', say `\def\cs{...}'.
I've inserted an inaccessible control sequence so that your
definition will be completed without mixing me up too badly.
You can recover graciously from this error, if you're
careful; see exercise 27.2 in The TeXbook.
! I can't find file `{test2-example_content.tex}'.
<to be read again>
\color_group_end:
l.11 \end
{tabular}
(Press Enter to retry, or Control-D to exit)
Please type another input file name
! Emergency stop.
但是，这些例子都很有效：
\documentclass{article}
\usepackage{siunitx}
\begin{filecontents*}{\jobname-example_content.tex}
1&2\\
\end{filecontents*}
\begin{document}
\begin{tabular}{cS}
\input{\jobname-example_content.tex}
\end{tabular}
\end{document}
\documentclass{article}
\usepackage{siunitx}
\begin{filecontents*}{\jobname-example_content.tex}
1&2\\
\end{filecontents*}
\makeatletter
\newcommand{\expinput}[1]{\@@input #1}
\makeatother
\begin{document}
\begin{tabular}{Sc}
\expinput{\jobname-example_content.tex}
\end{tabular}
\end{document}
总之，仅当我从文件输入值并且第一列是 S 列时才会出现问题。
这是我的版本信息：
$ pdflatex -version
pdfTeX 3.14159265-2.6-1.40.20 (TeX Live 2019)
相关问题：
答案1
只需更改\input{\jobname-example_content.tex}为\protect\input{\jobname-example_content.tex}，或者更好的是 \protect\input\jobname-example_content。
这是必要的，因为S默认情况下，列类型会以各种复杂的方式解析其输入，从而使其参数变得“脆弱”（在 LaTeX 特定意义上）。当然，如果您执行，则不需要\sisetup{parse-numbers=false}该指令。\protect
\documentclass{article}
\begin{filecontents*}[overwrite]{\jobname-example_content.tex}
1&2\\
\end{filecontents*}
\usepackage{siunitx}
\begin{document}
% Either one of the two following methods "works":
\begin{tabular}{Sl}
\protect\input\jobname-example_content
\end{tabular}
\sisetup{parse-numbers=false}
\begin{tabular}{Sc}
\input\jobname-example_content % observe: no \protect instruction
\end{tabular}
\end{document}