\begin{description}

\item[e1:] This routine is called from states 0, 2, 4 and 5, all of which expect the
beginning of an operand, either an \textbf{id} or a left parenthesis. Instead, +, *, or
the end of the input was found.

\setlength{\parindent}{10mm}
\indent push state 3 (the goto of states 0, 2, 4 and 5 on \textbf{id});\\
\indent issue diagnostic ``missing operand.''

\item[e2:] Called from states 0, 1, 2, 4 and 5 on finding a right parenthesis.