'Utility'->myUtility(@params);
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What you have is called a "fully specified name" and has nothing to do with objects.

The first argument for cases 1 and 2 could be an object or a classname. Checking just for blessed isn't enough, as the first parameter could be an object of an unrelated class. You can rather try

if (blessed $_[0] && $_[0]->isa(__PACKAGE__))
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and for a class name, you can do a similar thing:

if (! ref $_[0] && $_[0]->isa(__PACKAGE__))
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but what if the first parameter can really be an object of the class? If the number of parameters isn't fixed, there's no general solution.

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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