Hash::Util::FieldHash::Compat - Use Hash::Util::FieldHash or ties, depending on availability
use Hash::Util::FieldHash::Compat; # pretend you are using L<Hash::Util::FieldHash> # under older perls it'll be Tie::RefHash::Weak instead (slower, but same behavior)
This way code requiring field hashes can benefit from fast, robust field hashes on Perl 5.10 and newer, but still run on older perls that don't ship with that module.
See Hash::Util::FieldHash for all the details of the API.
יובל קוג'מן (Yuval Kogman) <email@example.com>
COPYRIGHT AND LICENSE
This software is copyright (c) 2008 by יובל קוג'מן (Yuval Kogman).
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.