\begin{diagram}{Function calls}{functioncalls}
\begin{mysyntdiag}
\synt{function\ call}
\begin{stack} 
\synt{function\ identifier} \\
\synt{method\ designator} \\
\synt{qualified\ method\ designator}\\
\synt{variable\ reference}
\end{stack}
\begin{stack}\\
\synt{actual\ parameter\ list}
\end{stack}
\end{mysyntdiag}
\begin{mysyntdiag}
\synt{actual\ parameter\ list}
\lit* ( 
\begin{stack}\\
\begin{rep}[b] 
\synt{expression} \\ 
\lit* , 
\end{rep} 
\end{stack}
\lit* )
\end{mysyntdiag}
\end{diagram}