[ this is a template for a new perldelta file. Any text flagged as XXX needs
to be processed before release. ]
-perldelta - what is new for perl v5.25.8
+perldelta - what is new for perl v5.25.9
=head1 DESCRIPTION
-This document describes differences between the 5.25.7 release and the 5.25.8
+This document describes differences between the 5.25.8 release and the 5.25.9
release.
-If you are upgrading from an earlier release such as 5.25.6, first read
-L<perl5257delta>, which describes differences between 5.25.6 and 5.25.7.
+If you are upgrading from an earlier release such as 5.25.7, first read
+L<perl5258delta>, which describes differences between 5.25.7 and 5.25.8.
=head1 Notice
[ List each enhancement as a =head2 entry ]
-=head2 New Hash Function For 64-bit Builds
-
-We have switched to a hybrid hash function to better balance
-performance for short and long keys.
-
-For short keys, 16 bytes and under, we use an optimised variant of
-One At A Time Hard, and for longer keys we use Siphash 1-3. For very
-long keys this is a big improvement in performance. For shorter keys
-there is a modest improvement.
-
=head1 Security
XXX Any security-related notices go here. In particular, any security
=head1 Deprecations
-XXX Any deprecated features, syntax, modules etc. should be listed here.
+=head2 String delimiters that aren't stand-alone graphemes are now
+deprecated
+
+In order for Perl to eventually allow string delimiters to be Unicode
+grapheme clusters (which look like a single character, but may be
+a sequence of several ones), we have to stop allowing a single char
+delimiter that isn't a grapheme by itself. These are unlikely to exist
+in actual code, as they would typically display as attached to the
+character in front of them.
=head2 Module removals
=over 4
-=item * New Faster Hash Function on 64 bit builds
-
-We use a different hash function for short and long keys. This should
-improve performance and security, especially for long keys.
-
-=item * readline is faster
+=item *
-Reading from a file line-by-line with c<readline()> or C<< <> >> should
-now typically be faster due to a better implementation of the code that
-searches for the next newline character.
+XXX
=back
=item *
-L<Pod::Simple> has been upgraded from version 3.32 to 3.35.
+L<B::Xref> has been upgraded from version 1.05 to 1.06.
+
+=item *
+
+L<Compress::Raw::Bzip2> has been upgraded from version 2.069 to 2.070.
+
+=item *
+
+L<Compress::Raw::Zlib> has been upgraded from version 2.069 to 2.070.
+
+=item *
+
+L<DB_File> has been upgraded from version 1.838 to 1.840.
+
+=item *
+
+L<Devel::SelfStubber> has been upgraded from version 1.05 to 1.06.
+
+=item *
+
+L<diagnostics> has been upgraded from version 1.35 to 1.36.
+
+=item *
+
+L<DynaLoader> has been upgraded from version 1.40 to 1.41.
+
+=item *
+
+L<Errno> has been upgraded from version 1.27 to 1.28.
+
+=item *
+
+L<ExtUtils::Embed> has been upgraded from version 1.33 to 1.34.
+
+=item *
+
+L<I18N::LangTags> has been upgraded from version 0.41 to 0.42.
+
+=item *
+
+L<lib> has been upgraded from version 0.63 to 0.64.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 5.20161220 to 5.20170120.
=item *
-L<Test::Simple> has been upgraded from version 1.302067 to 1.302071.
+L<OS2::Process> has been upgraded from version 1.11 to 1.12.
+
+=item *
+
+L<perl5db.pl> has been upgraded from version 1.50 to 1.51.
+
+=item *
+
+L<Storable> has been upgraded from version 2.59 to 2.61.
+
+=item *
+
+L<Symbol> has been upgraded from version 1.07 to 1.08.
+
+=item *
+
+L<Term::ReadLine> has been upgraded from version 1.15 to 1.16.
+
+=item *
+
+L<Test> has been upgraded from version 1.29 to 1.30.
+
+=item *
+
+L<threads::shared> has been upgraded from version 1.52 to 1.53.
+
+=item *
+
+L<Unicode::UCD> has been upgraded from version 0.67 to 0.68.
+
+=item *
+
+L<VMS::DCLsym> has been upgraded from version 1.07 to 1.08.
+
+=item *
+
+L<XSLoader> has been upgraded from version 0.24 to 0.26.
=back
=item *
-A new API function, C<sv_set_undef(sv)>, has been added. This is
-equivalent to C<sv_setsv(sv, &PL_sv_undef)>, but is more efficient.
+New versions of macros like C<isALPHA_utf8> and C<toLOWER_utf8> have
+been added, each with the
+suffix C<_safe>, like C<isSPACE_utf8_safe>. These take an extra
+parameter, giving an upper limit of how far into the string it is safe
+to read. Using the old versions could cause attempts to read beyond the
+end of the input buffer if the UTF-8 is not well-formed, and ther use
+now raises a deprecation warning. Details are at
+L<perlapi/Character classification>.
+
+=item *
+
+Calling macros like C<isALPHA_utf8> on malformed UTF-8 have issued a
+deprecation warning since Perl v5.18. They now die.
+Similarly, macros like C<toLOWER_utf8> on malformed UTF-8 now die.
+
+=item *
+
+Calling the functions C<utf8n_to_uvchr> and its derivatives, while
+passing a string length of 0 is now asserted against in DEBUGGING
+builds, and otherwise returns the Unicode REPLACEMENT CHARACTER. If
+you have nothing to decode, you shouldn't call the decode function.
+
+=item *
+
+The functions C<utf8n_to_uvchr> and its derivatives now return the
+Unicode REPLACEMENT CHARACTER if called with UTF-8 that has the overlong
+malformation, and that malformation is allowed by the input parameters.
+This malformation is where the UTF-8 looks valid syntactically, but
+there is a shorter sequence that yields the same code point. This has
+been forbidden since Unicode version 3.1.
+
+=item *
+
+The functions C<utf8n_to_uvchr> and its derivatives now accept an input
+flag to allow the overflow malformation. This malformation is when the
+UTF-8 may be syntactically valid, but the code point it represents is
+not capable of being represented in the word length on the platform.
+What "allowed" means in this case is that the function doesn't return an
+error, and advances the parse pointer to beyond the UTF-8 in question,
+but it returns the Unicode REPLACEMENT CHARACTER as the value of the
+code point (since the real value is not representable).
=back
=item *
-XXX
+Under C<use utf8>, the entire Perl program is now checked that the UTF-8
+is wellformed. This resolves [perl #126310].
=back
https://perl5.git.perl.org / perl5.git / blobdiff