No, don't do that. ref is broken:

• It fails for certain valid invocants (class names).
• It prohibits polymorphism, both in inheritance and interface equivalence.
• It returns undef on failure, so you have to go through contortions to avoid undefined value warnings.
• It's trivially easy to fool by blessing into a package named HASH.

perlfunc in bleadperl recommends several other techniques for doing the same thing without the problems.

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