Why? In the end, it does exactly the same thing:

    *{"$pkg\::$name"} = $code;
[download]

but a hell of a lot more convolutely.

And along the way, eschews using perfectly good Perl in favour of long laborious constructs because the author prefers to "whore for Devel::Cover"

    # I'd rather use ||= but I'm whoring for Devel::Cover.
    for (qw(into from)) { $arg->{$_} = $calling_pkg unless $arg->{$_} 
+}
[download]

That's just ...