I fail to see how re-arranging a single type glob entry is more convoluted (or complex) than having a state variable sitting around which is changed only once and tested every time the sub is called.
Seriously? Using the variable is very simple, and the intent should be pretty obvious to anyone if the variable has a clear name. To me, it seems a lot less complex than a self-modifying program. The typeglob approach should at least have a comment explaining its purpose.
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