Tikz decorations inheriting styles?

The prior options can be inherited if the decoration-declaring style first includes /utils/exec=\csname tikz@options\endcsname,, which should extract the current options into this style and be inherited by the show path construction methods. (I'm not a TikZ expert, so comments from more advanced users about the safety of this approach would be welcome.)

\documentclass[tikz, border=5pt]{standalone}
\usetikzlibrary{decorations.pathreplacing}

\tikzset{
  z->/.style={
    decoration={
      show path construction,
      lineto code={
        \path (\tikzinputsegmentfirst) -- (\tikzinputsegmentlast) coordinate[pos=.5] (mid);
        \draw[double] (\tikzinputsegmentfirst) -- (mid);
        \draw[->] (mid) -- (\tikzinputsegmentlast);
      }
    },decorate
  }
}

\tikzset{
  y->/.style={
    /utils/exec=\csname tikz@options\endcsname,
    decoration={
      show path construction,
      lineto code={
        \path (\tikzinputsegmentfirst) -- (\tikzinputsegmentlast) coordinate[pos=.5] (mid);
        \draw[double] (\tikzinputsegmentfirst) -- (mid);
        \draw[->] (mid) -- (\tikzinputsegmentlast);
      }
    },decorate
  }
}
\tikzset{
  x->/.style={
    inherit options/.code={\csname tikz@options\endcsname},inherit options,
    decoration={
      show path construction,
      lineto code={
        \path (\tikzinputsegmentfirst) -- (\tikzinputsegmentlast) coordinate[pos=.5] (mid);
        \draw[double] (\tikzinputsegmentfirst) -- (mid);
        \draw[->] (mid) -- (\tikzinputsegmentlast);
      }
    },decorate
  }
}

\begin{document}
\begin{tikzpicture}
  \node[anchor=west] at (1,0) {\tiny original};
  \draw [red, thick, z->] (0,0) -- (1,0);
  \begin{scope}[red, thick]
    \draw [z->] (0,.2) -- (1,.2);
  \end{scope}

  \tikzset{yshift=-0.6cm}
  \node[anchor=west] at (1,0) {\tiny inherit prior options};
  \draw [green, thick, y->] (0,0) -- (1,0);%options PRIOR to "y->" are inherited
  \begin{scope}[green, thick]
    \draw [y->] (0,.2) -- (1,.2);
  \end{scope}

  \tikzset{yshift=-0.6cm}
  \node[anchor=west] at (1,0) {\tiny does not inherit trailing options};
  \draw [blue, thick, y->, densely dotted] (0,0) -- (1,0);% options AFTER "y->" are NOT inherited
  \begin{scope}[blue, thick, densely dotted]
    \draw [y->] (0,.2) -- (1,.2);
  \end{scope}

  \tikzset{yshift=-0.6cm}
  \node[anchor=west] at (1,0) {\tiny alternate approach};
  \draw [orange, thick, x->] (0,0) -- (1,0);% options PRIOR to "x->" are inherited
  \begin{scope}[orange, thick]
    \draw [x->] (0,.2) -- (1,.2);
  \end{scope}

\end{tikzpicture}

\end{document}