Can you execute a function in an Oracle comment/hint?

I'm pretty sure I saw someone demonstrate the syntax for this before, but I've looked everywhere and can't find it now. What I'm trying to do is execute a function in the in-line comment of a query, like this:  

select /* sys_context('USERENV', 'SESSION_USER') */ sysdate from dual;

But, it's not working. The above query gets executed, but the sys_context function is not being executed, it's just being treated as a comment. What I want is for this query to show up as:

select /* SCOTT */ sysdate from dual

In v$sql.sql_text.

Is this possible, or am I just imagining having seen this before?

Thanks,
Brandon

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