\begin{diagram}{Raise statement}{classreftype}
\begin{mysyntdiag}
\synt{raise\ statement}
\lit*{raise}
\begin{stack}\\ 
  \synt{exception\ instance} 
  \begin{stack}\\
     \synt{exception\ address}
  \end{stack}
\end{stack}
\end{mysyntdiag}
\begin{mysyntdiag}
\synt{exception\ address}
\lit*{at} \synt{exception\ address}
\begin{stack}
\\ \lit*{,} \synt{address\ expression}
\end{stack}
\end{mysyntdiag}
\end{diagram}