Tikz/pgfkeys：从节点定义别名内容的语法

Question

我有一个节点和一些辅助节点（标签或不太重要的节点）。现在，如果我想允许用户通过样式自定义主节点和子节点，则用户需要编写类似 的内容main/.style={style main node}, subnode1/.style={style subnode}，但我更希望将其编写为style main node, subnode1/.style={style subnode}。我很好奇：这可能吗？我想我需要以某种方式从主样式中提取一些键，或者以某种方式将全局定义subnode1为全局样式（似乎每个节点都创建一个组？）。

梅威瑟：

\documentclass[options]{article}

\usepackage{tikz}
\usetikzlibrary{quotes}
\begin{document}

\pgfkeys{
  /first group of styles/.cd,
  cool fill color/.style={fill=pink},
  .search also={/tikz},% order is important
}

\pgfkeys{
  /second group of styles/.cd,
  cool shape/.style={draw,rounded corners},
  label style/.style={},
  label text/.store in=\labelText,
  load defaults/.append style={
    label text={Default label},
  },
  .search also={/tikz},
}

\NewExpandableDocumentCommand{\myNode}{O{}m}{
  \node[
    inner sep=3mm,
    .search also={/second group of styles,/first group of styles,/tikz},
    /second group of styles/load defaults,
    #1,
    % What is below is both ugly and failing
    /utils/exec={
      %%% Why is this needed?? Can I avoid it?
      \xdef\globalLabelText{\labelText}
      \message{OK}
    },
    "\globalLabelText" {%
      .search also={/first group of styles, /second group of styles,/tizk},      
      % Whyy can't I set the style? Again a scope problem?
      label style
    },
    alias=base
  ]
  {#2};
  \node[anchor=north] at (base.south){
    \globalLabelText
  };
}

\begin{tikzpicture}
  \myNode[
    cool fill color,
    cool shape,
    label text=My label,
    my style/.style={scale=3},
    label style/.style={red, my style},
  ]{A}
\end{tikzpicture}

\end{document}

编辑 似乎 pgf 过滤库为此提供了工具，但我的答案被删除了。