Here is another module using attributes to simplify an API and hide implementation details. This time it's Exporter's API. Exporter::Simple, when used by a package, allows that package to define exports in a more concise way than using `Exporter'. Instead of having to worry what goes in `@EXPORT', `@EXPORT_OK' and `%EXPORT_TAGS', you can use two attributes to define exporter behavior:
my @bar : Exportable(vars) = (2, 3, 5, 7);
my $foo : Exported(vars) = 42;
my %baz : Exported = (a => 65, b => 66);
sub hello : Exported(greet,uk) { "hello there" }
sub askme : Exportable { "what you will" }
sub hi : Exportable(greet,us) { "hi there" }
You get the idea. I wasn't sure whether to emulate attributes for globals as well, but seeing that they're going to be in Perl 5.8.0, I'm going to wait until that's out before revising Exporter::Simple for a clean solution.
Enjoy. Feedback, as always, is welcome.
