Is it possible (and if yes, of course how) to use Greek letters within
lstlisting (of the
listings package)? However,
\epsilon, for instance, puts of course exactly that and not a Greek epsilon.
I have read in the documentation that it is possible to write e.g. Greek comments, but that is not what I want to do. I'm using
lstlisting to write EBNF and would like to use an
\epsilon for "empty".