diff options
Diffstat (limited to 'pod/perltie.pod')
| -rw-r--r-- | pod/perltie.pod | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/pod/perltie.pod b/pod/perltie.pod index 8f3a6774ae..7b8d4970ad 100644 --- a/pod/perltie.pod +++ b/pod/perltie.pod @@ -1072,6 +1072,14 @@ modules L<Tie::Scalar>, L<Tie::Array>, L<Tie::Hash>, or L<Tie::Handle>. =head1 BUGS +The bucket usage information provided by C<scalar(%hash)> is not +available. What this means is that using %tied_hash in boolean +context doesn't work right (currently this always tests false, +regardless of whether the hash is empty or hash elements). + +Localizing tied arrays or hashes does not work. After exiting the +scope the arrays or the hashes are not restored. + You cannot easily tie a multilevel data structure (such as a hash of hashes) to a dbm file. The first problem is that all but GDBM and Berkeley DB have size limitations, but beyond that, you also have problems @@ -1083,12 +1091,8 @@ source code to MLDBM. Tied filehandles are still incomplete. sysopen(), truncate(), flock(), fcntl(), stat() and -X can't currently be trapped. -The bucket usage information provided by C<scalar(%hash)> is not -available. If C<%hash> is tied, this will currently result in a -fatal error. - -Counting the number of entries in a hash via C<scalar(keys(%hash))> or -C<scalar(values(%hash)>) is inefficient since it needs to iterate +Counting the number of entries in a hash via C<scalar(keys(%hash))> +or C<scalar(values(%hash)>) is inefficient since it needs to iterate through all the entries with FIRSTKEY/NEXTKEY. =head1 AUTHOR |