![tikz inside expl3](https://linux22.com/image/427407/tikz%20inside%20expl3%20.png)
我无法弄清楚在这个基本示例中我做错了什么。我想在我的 expl3 代码中有一个函数使用 tikz 绘制一个简单的图片,但我收到错误Package pgf Error: No shape named 0:0 is known.
平均能量损失
\documentclass{extbook}
\usepackage{tikz}
\usetikzlibrary{arrows,automata,positioning,calc}
% my command to draw an orange rectangle with tikz
\newcommand{\drawmyshape}{
\tikz[font=\normalsize]{
\draw[color=orange!50, fill=orange] (0:0) -- ++(\linewidth,0) -- ++(0,-2em) -- (0,-2em) -- (0,0);
}%%%%%
}%%%%%
\usepackage{xparse}%allows the NewDocumentCommand
\ExplSyntaxOn
%Why does the tikz code inside the expl3syntax break it? I need to be able to call this here.
\NewDocumentCommand{\drawmyshapeagain}{}{
\tikz[font=\normalsize]{
\draw[color=orange!50, fill=orange] (0:0) -- ++(\linewidth,0) -- ++(0,-2em) -- (0,-2em) -- (0,0);
}%%%%%
}%%%%%
\ExplSyntaxOff
\begin{document}
\drawmyshape
\drawmyshapeagain
\end{document}
答案1
在 expl3 中,冒号是一个字母,这会破坏代码中的 (0:0)。您在示例中没有使用 expl3 命令,因此最简单的方法是删除该\ExplSyntaxOn
命令,但如果您需要它来做其他事情,您可以使用它(在这种情况下,这并不总是有效)\c_colon_str
:
\documentclass{extbook}
\usepackage{tikz}
\usetikzlibrary{arrows,automata,positioning,calc}
% my command to draw an orange rectangle with tikz
\newcommand{\drawmyshape}{
\tikz[font=\normalsize]{
\draw[color=orange!50, fill=orange] (0:0) -- ++(\linewidth,0) -- ++(0,-2em) -- (0,-2em) -- (0,0);
}%%%%%
}%%%%%
\usepackage{xparse}%allows the NewDocumentCommand
\ExplSyntaxOn
%Why does the tikz code inside the expl3syntax break it? I need to be able to call this here.
\NewDocumentCommand{\drawmyshapeagain}{}{
\tikz[font=\normalsize]{
\draw[color=orange!50, fill=orange] (0\c_colon_str0) -- ++(\linewidth,0) -- ++(0,-2em) -- (0,-2em) -- (0,0);
}%%%%%
}%%%%%
\ExplSyntaxOff
\begin{document}
\drawmyshape
\drawmyshapeagain
\end{document}