You're correct that the Perl5 parser cannot manage undefined operators. You only get to overload existing operators. Perl6 is supposed to remedy that.
Wasn't there a post recently (on another topic) about creating subroutine names out of any charater string, and not just the standard set? (Maybe it was in obfuscation, but I can't find it.)

Update: Added quote, plus followup:

Here it is: What is this doing, and why is this a good method of doing it?, and where Zaxo describes what it does.

-QM
--
Quantum Mechanics: The dreams stuff is made of

In reply to Re^2: overloading core function and non-existing operator by QM
in thread overloading core function and non-existing operator by pg

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