Actually I think named constants are better. Strict provides a useful diagnostic for you if you mistype any of them, so the module doesn't have to do anything. And if you don't like bitwise or, you can make your method accept a list, like 

autodie::hints->set_hints_for(
    \&foo,
    LIST_EMPTY_OR_FALSE, SCALAR_UNDEF_ONLY
);

[download]

In reply to Re: RFC: User subroutine hinting interface for autodie by ambrus
in thread RFC: User subroutine hinting interface for autodie by pjf

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