The official solution is: 

    UNIVERSAL::isa( $re, "Regexp" )

[download]
but unfortunately UNIVERSAL::isa() is broken in this respect. Time to send in a patch (well, at least a bug report)!

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Dumping Compiled Regular Expressions by tye
in thread Dumping Compiled Regular Expressions by Hrunting

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