[ 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 v5.17.7
+perldelta - what is new for perl v5.17.9
=head1 DESCRIPTION
-This document describes differences between the 5.17.6 release and the 5.17.7
+This document describes differences between the 5.17.8 release and the 5.17.9
release.
-If you are upgrading from an earlier release such as 5.17.5, first read
-L<perl5176delta>, which describes differences between 5.17.5 and 5.17.6.
+If you are upgrading from an earlier release such as 5.17.7, first read
+L<perl5178delta>, which describes differences between 5.17.7 and 5.17.8.
=head1 Notice
=head1 Incompatible Changes
-=head2 readline() with C<$/ = \N> now reads N characters, not N bytes
-
-Previously, when reading from a stream with I/O layers such as
-C<encoding>, the readline() function, otherwise known as the C<< <> >>
-operator, would read I<N> bytes from the top-most layer. [perl #79960]
-
-Now, I<N> characters are read instead.
-
-There is no change in behaviour when reading from streams with no
-extra layers, since bytes map exactly to characters.
-
XXX For a release on a stable branch, this section aspires to be:
There are no changes intentionally incompatible with 5.XXX.XXX
[ List each deprecation as a =head2 entry ]
-=head2 Various XS-callable functions are now deprecated
-
-The following functions will be removed from a future version of Perl,
-and should not be used. With participating C compilers (e.g., gcc),
-compiling any file that uses any of these will generate a warning.
-These were not intended for public use; there are equivalent, faster,
-macros for most of them. See L<perlapi/Character classes>:
-C<is_uni_ascii>,
-C<is_uni_ascii_lc>,
-C<is_uni_blank>,
-C<is_uni_blank_lc>,
-C<is_uni_cntrl>,
-C<is_uni_cntrl_lc>,
-C<is_uni_idfirst_lc>,
-C<is_uni_space>,
-C<is_uni_space_lc>,
-C<is_uni_xdigit>,
-C<is_uni_xdigit_lc>,
-C<is_utf8_ascii>,
-C<is_utf8_blank>,
-C<is_utf8_cntrl>,
-C<is_utf8_idcont>,
-C<is_utf8_idfirst>,
-C<is_utf8_perl_space>,
-C<is_utf8_perl_word>,
-C<is_utf8_posix_digit>,
-C<is_utf8_space>,
-C<is_utf8_xdigit>.
-C<is_utf8_xidcont>,
-C<is_utf8_xidfirst>,
-C<to_uni_lower_lc>,
-C<to_uni_title_lc>,
+=head2 Five additional characters should be escaped in patterns with C</x>
+
+When a regular expression pattern is compiled with C</x>, Perl treats 6
+characters as white space to ignore, such as SPACE and TAB. However,
+Unicode recommends 11 characters be treated thusly. In preparation to
+conforming with this in a future Perl version, in the meantime, use of
+any of the missing characters will raise a deprecation warning, unless
+turned off. The five characters are:
+U+0085 NEXT LINE,
+U+200E LEFT-TO-RIGHT MARK,
+U+200F RIGHT-TO-LEFT MARK,
+U+2028 LINE SEPARATOR,
and
-C<to_uni_upper_lc>.
+U+2029 PARAGRAPH SEPARATOR.
=head1 Performance Enhancements
=item *
-L<GDBM_File> has been upgraded from version 1.14 to 1.15. The undocumented
-optional fifth parameter to C<TIEHASH> has been removed. This was intended
-to provide control of the callback used by C<gdbm*> functions in case of
-fatal errors (such as filesystem problems), but did not work (and could
-never have worked). No code on CPAN even attempted to use it. The callback
-is now always the previous default, C<croak>. Problems on some platforms with
-how the C<C> C<croak> function is called have also been resolved.
+L<PerlIO::scalar> has been upgraded from version 0.15 to 0.16.
+
+The buffer scalar supplied may now only contain code pounts 0xFF or
+lower. [perl #109828]
=back
However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
section.
-=head3 L<perlapi/Character classes>
+=head3 L<XXX>
=over 4
=item *
-There are quite a few macros callable from XS modules that classify
-characters into things like alphabetic, punctuation, etc. More of these
-are now documented, including ones which work on characters whose code
-points are outside the Latin-1 range.
+XXX Description of the change here
=back
=head2 Discontinued Platforms
+XXX List any platforms that this version of perl no longer compiles on.
+
=over 4
-=item BeOS
+=item XXX-some-platform
-Support for BeOS has been removed.
+XXX
=back
=item *
-SvUPGRADE() is no longer an expression. Originally this macro (and its
-underlying function, sv_upgrade()) were documented as boolean, although
-in reality they always croaked on error and never returned false. In 2005
-the documentation was updated to specify a void return value, but
-SvUPGRADE() was left always returning 1 for backwards compatibility. This
-has now been removed, and SvUPGRADE() is now a statement with no return
-value.
-
-So this is now a syntax error:
-
- if (!SvUPGRADE(sv)) { croak(...); }
-
-If you have code like that, simply replace it with
-
- SvUPGRADE(sv);
-
-or to to avoid compiler warnings with older perls, possibly
-
- (void)SvUPGRADE(sv);
+XXX
=back
=item *
-C<sort {undef} ...> under fatal warnings no longer crashes. It started
-crashing in Perl 5.16.
-
-=item *
-
-Stashes blessed into each other
-(C<bless \%Foo::, 'Bar'; bless \%Bar::, 'Foo'>) no longer result in double
-frees. This bug started happening in Perl 5.16.
-
-=item *
-
-Numerous memory leaks have been fixed, mostly involving fatal warnings and
-syntax errors.
+-DPERL_GLOBAL_STRUCT builds now free the global struct B<after>
+they've finished using it.
=back
XXX Generate this with:
- perl Porting/acknowledgements.pl v5.17.6..HEAD
+ perl Porting/acknowledgements.pl v5.17.8..HEAD
=head1 Reporting Bugs
https://perl5.git.perl.org / perl5.git / blobdiff