+=encoding utf8
+
=head1 NAME
-perldelta - what is new for perl v5.9.3
+perl593delta - what is new for perl v5.9.3
=head1 DESCRIPTION
The support for assertions, introduced in perl 5.9.0, has been improved.
The syntax for the C<-A> command-line switch has changed; it now accepts
an optional module name, defaulting to C<assertions::activate>. See
-L<assertions> and L<perlrun>. (Contributed by Salvador Fandiño García.)
+L<assertions> and L<perlrun>. (Contributed by Salvador Fandiño García.)
=head2 Unicode Character Database 4.1.0
=head2 C<no VERSION>
You can now use C<no> followed by a version number to specify that you
-want to use a version of perl inferior to the specified one.
+want to use a version of perl older than the specified one.
=head2 Recursive sort subs
C<Digest::SHA> is a module used to calculate many types of SHA digests,
has been included for SHA support in the CPAN module.
+=item *
+
+C<ExtUtils::CBuilder> and C<ExtUtils::ParseXS> have been added.
+
=back
=head1 Utility Changes
C<ptar> is a pure perl implementation of C<tar>, that comes with
C<Archive::Tar>.
+=head2 C<ptardiff>
+
+C<ptardiff> is a small script used to generate a diff between the contents
+of a tar archive and a directory tree. Like C<ptar>, it comes with
+C<Archive::Tar>.
+
=head2 C<shasum>
This command-line utility, used to print or to check SHA digests, comes
documentation, technical and otherwise, kindly provided by O'Reilly Media,
Inc.
+L<perltodo> now lists a rough roadmap to Perl 5.10.
+
=head1 Performance Enhancements
=head2 XS-assisted SWASHGET
The new compilation flag C<PERL_DONT_CREATE_GVSV>, introduced as an option
in perl 5.8.8, is turned on by default in perl 5.9.3. It prevents perl
-from creating an empty scalar with every new typeglob. See L<perl588delta>
+from creating an empty scalar with every new typeglob. See L<perl589delta>
for details.
=head2 Weak references are cheaper
=head2 sort() enhancements
-Salvador Fandiño provided improvements to reduce the memory usage of C<sort>
+Salvador Fandiño provided improvements to reduce the memory usage of C<sort>
and to speed up some cases.
=head1 Installation and Configuration Improvements
Using the sprintf() function with some formats could lead to a buffer
overflow in some specific cases. This has been fixed, along with several
-other bugs, notably in bound checking.
+other bugs, notably in bounds checking.
In related fixes, it was possible for badly written code that did not follow
the documentation of C<Sys::Syslog> to have formatting vulnerabilities.
=item *
-Operations that require perl to read a process' list of groups, such as reads
+Operations that require perl to read a process's list of groups, such as reads
of C<$(> and C<$)>, now dynamically allocate memory rather than using a
fixed sized array. The fixed size array could cause C stack exhaustion on
systems configured to use large numbers of groups.
=item *
-You can now use the C<x> operator to repeat a C<qw//> list. This used
-to raise a syntax error. For example: C<qw(foo bar) x 3>.
+The C<x> repetition operator is now able to operate on C<qw//> lists. This
+used to raise a syntax error.
=item *
The inheritance hierarchy of C<B::> modules has changed; C<B::NV> now
inherits from C<B::SV> (it used to inherit from C<B::IV>).
-=head1 Known Problems
-
-=head2 Platform Specific Problems
-
=head1 Reporting Bugs
If you find what you think is a bug, you might check the articles
https://perl5.git.perl.org / perl5.git / blobdiff