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Prior to Perl 5.8, attributes don't work at all on C<our> variables.
Only function attributes can be used effectively on such old versions.

This module tries quite hard to play nicely with other modules that manage
attributes, in particular L<Attribute::Handlers>.  However, the underlying
protocol for attribute management is tricky, and convoluted arrangements
of attribute managers are liable to tread on each other's toes.

The management of handler functions is likely to run into trouble where
threads are used.  Code compiled before any threads are created should
be OK, as should anything contained entirely within a single thread,
but code shared between threads will probably have trouble due to Perl
not properly sharing data structures.

=head1 SEE ALSO

L<Attribute::Handlers>,
L<attributes>

=head1 AUTHOR

Andrew Main (Zefram) <zefram@fysh.org>