\begin{tikzpicture}
    \splitter[wedge=1] at (0,0);
    \node[anchor=east] at (-1,0){\verb!\splitter[wedge=1] at (x,y);!};
    \splitter[wedge=0.5] at (0,-1.5);
    \node[anchor=east] at (-1,-1.5){\verb!\splitter[wedge=1/2] at (x,y);!};
    \splitter[wedge=-1] at (0,-3);
    \node[anchor=east] at (-1,-3){\verb!\splitter[wedge=-1] at (x,y);!};
    \splitter[wedge=-0.5] at (0,-4.5);
    \node[anchor=east] at (-1,-4.5){\verb!\splitter[wedge=-1/2] at (x,y);!};
\end{tikzpicture}