[p5sagit/p5-mst-13.2.git] / pod / perl5112delta.pod

=head1 NAME

[ Any text flagged as XXX needs to be processed before release. ]

perldelta - what is new for perl v5.11.2

=head1 DESCRIPTION

This document describes differences between the 5.11.1 release and
the 5.11.2 release.

=head1 Notice

XXX Unlikely to need this section.

=head1 Incompatible Changes

=head2 Use of C<:=> to mean an empty attribute list is now deprecated.

An accident of Perl's parser means that these constructions are all equivalent:

    my $pi := 4;
    my $pi : = 4;
    my $pi :  = 4;

with the C<:> being treated as the start of an attribute list, which ends
before the C<=>. As whitespace is not significant here, all are parsed as an
empty attribute list, hence all the above are equivalent to, and better written
as

    my $pi = 4;

because no attribute processing is done for an empty list.

As is, this means that C<:=> cannot be used as a new token, without silently
changing the meaning of existing code. Hence that particular form is now
deprecated, and will become a syntax error. If it is absolutely necessary to
have empty attribute lists (for example, because of a code generator) the
avoid the warning by adding a space before the C<=>.

=head1 Core Enhancements

XXX New core language features go here. Summarise user-visible core language
enhancements. Particularly prominent performance optimisations could go
here, but most should go in the L</Performance Enhancements> section.

=head1 New Platforms

XXX List any platforms that this version of perl compiles on, that previous
versions did not. These will either be enabled by new files in the F<hints/>
directories, or new subdirectories and F<README> files at the top level of the
source tree.

=head1 Modules and Pragmata

XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
go here, in a list ordered by distribution name. Minimally it should be the
module version, but it's more useful to the end user to give a paragraph's
summary of the module's changes. In an ideal world, dual-life modules would
have a F<Changes> file that could be cribbed.

=head2 New Modules and Pragmata

=over 4

=item C<XXX>

XXX

=back

=head2 Pragmata Changes

=over 4

=item C<XXX>

XXX

=back

=head2 Updated Modules

=over 4

=item C<XXX>

XXX

=back

=head1 Utility Changes

XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go
here. Most of these are built within the directories F<utils> and F<x2p>.

=over 4

=item F<XXX>

XXX

=back

=head1 New Documentation

XXX Changes which create B<new> files in F<pod/> go here.

=over 4

=item L<XXX>

XXX

=back

=head1 Changes to Existing Documentation

XXX Changes which significantly change existing files in F<pod/> go here.
Any changes to F<pod/perldiag.pod> should go in L</New or Changed Diagnostics>.


=head1 Performance Enhancements

XXX Changes which enhance performance without changing behaviour go here. There
may well be none in a stable release.

=over 4

=item *

XXX

=back

=head1 Installation and Configuration Improvements

XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
go here.

=head2 Configuration improvements

XXX

=head2 Compilation improvements

XXX

=head2 Platform Specific Changes

=over 4

=item XXX-some-platform

XXX

=back

=head1 Selected Bug Fixes

XXX Important bug fixes in the core language are summarised here.
Bug fixes in files in F<ext/> and F<lib/> are best summarised in
L</Modules and Pragmata>.

=over 4

=item *

XXX

=back

=head1 New or Changed Diagnostics

XXX New or changed warnings emitted by the core's C<C> code go here.

=over 4

=item C<XXX>

XXX

=back

=head1 Changed Internals

=over 4

=item *

C<Perl_pmflag> has been removed from the public API. Calling it now generates
a deprecation warning, and it will be removed in a future release. Although
listed as part of the API, it was never documented, and only ever used in
F<toke.c>, and prior to 5.10, F<regcomp.c>. In core, it has been replaced by a
static function.

=back

=head1 New Tests

XXX Changes which create B<new> files in F<t/> go here. Changes to
existing files in F<t/> aren't worth summarising, although the bugs that
they represent may be.

=over 4

=item F<XXX>

XXX

=back

=head1 Known Problems

XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
tests that had to be C<TODO>ed for the release would be noted here, unless
they were specific to a particular platform (see below).

This is a list of some significant unfixed bugs, which are regressions
from either 5.10.1 or 5.11.1.

=over 4

=item *

XXX

=back

=head1 Deprecations

XXX Add any new known deprecations here.

The following items are now deprecated.

=over 4

=item *

XXX

=back

=head1 Platform Specific Notes

XXX Any changes specific to a particular platform. VMS and Win32 are the usual
stars here. It's probably best to group changes under the same section layout
as the main perldelta

=head1 Obituary

XXX If any significant core contributor has died, we've added a short obituary
here.

=head1 Acknowledgements

XXX The list of people to thank goes here.


=head1 Reporting Bugs

If you find what you think is a bug, you might check the articles
recently posted to the comp.lang.perl.misc newsgroup and the perl
bug database at http://rt.perl.org/perlbug/ .  There may also be
information at http://www.perl.org/ , the Perl Home Page.

If you believe you have an unreported bug, please run the B<perlbug>
program included with your release.  Be sure to trim your bug down
to a tiny but sufficient test case.  Your bug report, along with the
output of C<perl -V>, will be sent off to perlbug@perl.org to be
analysed by the Perl porting team.

If the bug you are reporting has security implications, which make it
inappropriate to send to a publicly archived mailing list, then please send
it to perl5-security-report@perl.org. This points to a closed subscription
unarchived mailing list, which includes all the core committers, who be able
to help assess the impact of issues, figure out a resolution, and help
co-ordinate the release of patches to mitigate or fix the problem across all
platforms on which Perl is supported. Please only use this address for
security issues in the Perl core, not for modules independently
distributed on CPAN.

=head1 SEE ALSO

The F<Changes> file for an explanation of how to view exhaustive details
on what changed.

The F<INSTALL> file for how to build Perl.

The F<README> file for general stuff.

The F<Artistic> and F<Copying> files for copyright information.

=cut
Commit	Line	Data
d5114285	1	=head1 NAME
	2
	3	[ Any text flagged as XXX needs to be processed before release. ]
	4
	5	perldelta - what is new for perl v5.11.2
	6
	7	=head1 DESCRIPTION
	8
	9	This document describes differences between the 5.11.1 release and
	10	the 5.11.2 release.
	11
	12	=head1 Notice
	13
	14	XXX Unlikely to need this section.
	15
	16	=head1 Incompatible Changes
	17
d83f38d8	18	=head2 Use of C<:=> to mean an empty attribute list is now deprecated.
d5114285	19
d83f38d8	20	An accident of Perl's parser means that these constructions are all equivalent:
d5114285	21
d83f38d8	22	my $pi := 4;
	23	my $pi : = 4;
	24	my $pi : = 4;
	25
	26	with the C<:> being treated as the start of an attribute list, which ends
	27	before the C<=>. As whitespace is not significant here, all are parsed as an
	28	empty attribute list, hence all the above are equivalent to, and better written
	29	as
	30
	31	my $pi = 4;
	32
	33	because no attribute processing is done for an empty list.
	34
	35	As is, this means that C<:=> cannot be used as a new token, without silently
	36	changing the meaning of existing code. Hence that particular form is now
	37	deprecated, and will become a syntax error. If it is absolutely necessary to
	38	have empty attribute lists (for example, because of a code generator) the
	39	avoid the warning by adding a space before the C<=>.
d5114285	40
	41	=head1 Core Enhancements
	42
	43	XXX New core language features go here. Summarise user-visible core language
	44	enhancements. Particularly prominent performance optimisations could go
	45	here, but most should go in the L</Performance Enhancements> section.
	46
	47	=head1 New Platforms
	48
	49	XXX List any platforms that this version of perl compiles on, that previous
	50	versions did not. These will either be enabled by new files in the F<hints/>
	51	directories, or new subdirectories and F<README> files at the top level of the
	52	source tree.
	53
	54	=head1 Modules and Pragmata
	55
	56	XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
	57	go here, in a list ordered by distribution name. Minimally it should be the
	58	module version, but it's more useful to the end user to give a paragraph's
	59	summary of the module's changes. In an ideal world, dual-life modules would
	60	have a F<Changes> file that could be cribbed.
	61
	62	=head2 New Modules and Pragmata
	63
	64	=over 4
	65
	66	=item C<XXX>
	67
	68	XXX
	69
	70	=back
	71
	72	=head2 Pragmata Changes
	73
	74	=over 4
	75
	76	=item C<XXX>
	77
	78	XXX
	79
	80	=back
	81
	82	=head2 Updated Modules
	83
	84	=over 4
	85
	86	=item C<XXX>
	87
	88	XXX
	89
	90	=back
	91
	92	=head1 Utility Changes
	93
	94	XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go
	95	here. Most of these are built within the directories F<utils> and F<x2p>.
	96
	97	=over 4
	98
	99	=item F<XXX>
	100
	101	XXX
	102
	103	=back
104
105	=head1 New Documentation
106
107	XXX Changes which create B<new> files in F<pod/> go here.
108
109	=over 4
110
111	=item L<XXX>
112
113	XXX
114
115	=back
116
117	=head1 Changes to Existing Documentation
118
119	XXX Changes which significantly change existing files in F<pod/> go here.
120	Any changes to F<pod/perldiag.pod> should go in L</New or Changed Diagnostics>.
121
122
123	=head1 Performance Enhancements
124
125	XXX Changes which enhance performance without changing behaviour go here. There
126	may well be none in a stable release.
127
128	=over 4
129
130	=item *
131
132	XXX
133
134	=back
135
136	=head1 Installation and Configuration Improvements
137
138	XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
139	go here.
140
141	=head2 Configuration improvements
142
143	XXX
144
145	=head2 Compilation improvements
146
147	XXX
148
149	=head2 Platform Specific Changes
150
151	=over 4
152
153	=item XXX-some-platform
154
155	XXX
156
157	=back
158
159	=head1 Selected Bug Fixes
160
161	XXX Important bug fixes in the core language are summarised here.
162	Bug fixes in files in F<ext/> and F<lib/> are best summarised in
163	L</Modules and Pragmata>.
164
165	=over 4
166
167	=item *
168
169	XXX
170
171	=back
172
173	=head1 New or Changed Diagnostics
174
175	XXX New or changed warnings emitted by the core's C<C> code go here.
176
177	=over 4
178
179	=item C<XXX>
180
181	XXX
182
183	=back
184
185	=head1 Changed Internals
186
d5114285	187	=over 4
	188
	189	=item *
	190
879d0c72	191	C<Perl_pmflag> has been removed from the public API. Calling it now generates
	192	a deprecation warning, and it will be removed in a future release. Although
	193	listed as part of the API, it was never documented, and only ever used in
	194	F<toke.c>, and prior to 5.10, F<regcomp.c>. In core, it has been replaced by a
	195	static function.
d5114285	196
	197	=back
	198
	199	=head1 New Tests
	200
	201	XXX Changes which create B<new> files in F<t/> go here. Changes to
	202	existing files in F<t/> aren't worth summarising, although the bugs that
	203	they represent may be.
	204
	205	=over 4
	206
	207	=item F<XXX>
	208
	209	XXX
	210
	211	=back
	212
	213	=head1 Known Problems
	214
	215	XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
	216	tests that had to be C<TODO>ed for the release would be noted here, unless
	217	they were specific to a particular platform (see below).
	218
	219	This is a list of some significant unfixed bugs, which are regressions
	220	from either 5.10.1 or 5.11.1.
	221
	222	=over 4
	223
	224	=item *
	225
	226	XXX
	227
	228	=back
	229
	230	=head1 Deprecations
	231
	232	XXX Add any new known deprecations here.
	233
	234	The following items are now deprecated.
	235
	236	=over 4
	237
	238	=item *
	239
	240	XXX
	241
	242	=back
	243
	244	=head1 Platform Specific Notes
	245
	246	XXX Any changes specific to a particular platform. VMS and Win32 are the usual
	247	stars here. It's probably best to group changes under the same section layout
	248	as the main perldelta
	249
	250	=head1 Obituary
	251
	252	XXX If any significant core contributor has died, we've added a short obituary
	253	here.
	254
	255	=head1 Acknowledgements
	256
	257	XXX The list of people to thank goes here.
	258
	259
260	=head1 Reporting Bugs
261
262	If you find what you think is a bug, you might check the articles
263	recently posted to the comp.lang.perl.misc newsgroup and the perl
264	bug database at http://rt.perl.org/perlbug/ . There may also be
265	information at http://www.perl.org/ , the Perl Home Page.
266
267	If you believe you have an unreported bug, please run the B<perlbug>
268	program included with your release. Be sure to trim your bug down
269	to a tiny but sufficient test case. Your bug report, along with the
270	output of C<perl -V>, will be sent off to perlbug@perl.org to be
271	analysed by the Perl porting team.
272
273	If the bug you are reporting has security implications, which make it
274	inappropriate to send to a publicly archived mailing list, then please send
275	it to perl5-security-report@perl.org. This points to a closed subscription
276	unarchived mailing list, which includes all the core committers, who be able
277	to help assess the impact of issues, figure out a resolution, and help
278	co-ordinate the release of patches to mitigate or fix the problem across all
279	platforms on which Perl is supported. Please only use this address for
280	security issues in the Perl core, not for modules independently
281	distributed on CPAN.
282
283	=head1 SEE ALSO
284
285	The F<Changes> file for an explanation of how to view exhaustive details
286	on what changed.
287
288	The F<INSTALL> file for how to build Perl.
289
290	The F<README> file for general stuff.
291
292	The F<Artistic> and F<Copying> files for copyright information.
293
294	=cut