5 perldelta - what is new for perl v5.16.0
9 This document describes differences between the 5.14.0 release and
12 If you are upgrading from an earlier release such as 5.12.0, first read
13 L<perl5140delta>, which describes differences between 5.12.0 and
18 XXX Any important notices here
20 =head1 Core Enhancements
22 XXX New core language features go here. Summarise user-visible core language
23 enhancements. Particularly prominent performance optimisations could go
24 here, but most should go in the L</Performance Enhancements> section.
26 [ List each enhancement as a =head2 entry ]
30 XXX Any security-related notices go here. In particular, any security
31 vulnerabilities closed should be noted here rather than in the
32 L</Selected Bug Fixes> section.
34 [ List each security issue as a =head2 entry ]
36 =head1 Incompatible Changes
38 XXX For a release on a stable branch, this section aspires to be:
40 There are no changes intentionally incompatible with 5.XXX.XXX
41 If any exist, they are bugs, and we request that you submit a
42 report. See L</Reporting Bugs> below.
44 [ List each incompatible change as a =head2 entry ]
48 XXX Any deprecated features, syntax, modules etc. should be listed here.
49 In particular, deprecated modules should be listed here even if they are
50 listed as an updated module in the L</Modules and Pragmata> section.
52 [ List each deprecation as a =head2 entry ]
54 =head1 Future Deprecations
56 This section serves as a notice of feature that are I<likely> to be
57 L<deprecated|perlpolicy/deprecated> in the next release of perl (5.18.0). If
58 your code depends on these features, you should contact the Perl 5 Porters via
59 the L<mailing list|http://lists.perl.org/list/perl5-porters.html> or L<perlbug>
60 to explain your use case and inform the deprecation process.
62 =head1 Performance Enhancements
64 XXX Changes which enhance performance without changing behaviour go here. There
65 may well be none in a stable release.
67 [ List each enhancement as a =item entry ]
77 =head1 Modules and Pragmata
79 XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
80 go here. If Module::CoreList is updated, generate an initial draft of the
81 following sections using F<Porting/corelist-perldelta.pl>, which prints stub
82 entries to STDOUT. Results can be pasted in place of the '=head2' entries
83 below. A paragraph summary for important changes should then be added by hand.
84 In an ideal world, dual-life modules would have a F<Changes> file that could be
87 [ Within each section, list entries as a =item entry ]
89 =head2 New Modules and Pragmata
99 =head2 Updated Modules and Pragmata
105 L<XXX> has been upgraded from version 0.69 to version 0.70.
109 =head2 Removed Modules and Pragmata
121 XXX Changes to files in F<pod/> go here. Consider grouping entries by
122 file and be sure to link to the appropriate page, e.g. L<perlfunc>.
124 =head2 New Documentation
126 XXX Changes which create B<new> files in F<pod/> go here.
130 XXX Description of the purpose of the new file here
132 =head2 Changes to Existing Documentation
134 XXX Changes which significantly change existing files in F<pod/> go here.
135 However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
144 XXX Description of the change here
150 The following additions or changes have been made to diagnostic output,
151 including warnings and fatal error messages. For the complete list of
152 diagnostic messages, see L<perldiag>.
154 XXX New or changed warnings emitted by the core's C<C> code go here. Also
155 include any changes in L<perldiag> that reconcile it to the C<C> code.
157 [ Within each section, list entries as a =item entry that links to perldiag,
162 L<Invalid version object|perldiag/"Invalid version object">
165 =head2 New Diagnostics
167 XXX Newly added diagnostic messages go here
175 XXX L<message|perldiag/"message">
185 XXX L<message|perldiag/"message">
189 =head2 Changes to Existing Diagnostics
191 XXX Changes (i.e. rewording) of diagnostic messages go here
197 XXX Describe change here
201 =head1 Utility Changes
203 XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go
204 here. Most of these are built within the directories F<utils> and F<x2p>.
206 [ List utility changes as a =head3 entry for each utility and =item
207 entries for each change
208 Use L<XXX> with program names to get proper documentation linking. ]
220 =head1 Configuration and Compilation
222 XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
223 go here. Any other changes to the Perl build process should be listed here.
224 However, any platform-specific changes should be listed in the
225 L</Platform Support> section, instead.
227 [ List changes as a =item entry ].
239 XXX Any significant changes to the testing of a freshly built perl should be
240 listed here. Changes which create B<new> files in F<t/> go here as do any
241 large changes to the testing harness (e.g. when parallel testing was added).
242 Changes to existing files in F<t/> aren't worth summarising, although the bugs
243 that they represent may be covered elsewhere.
245 [ List each test improvement as a =item entry ]
255 =head1 Platform Support
257 XXX Any changes to platform support should be listed in the sections below.
259 [ Within the sections, list each platform as a =item entry with specific
260 changes as paragraphs below it. ]
264 XXX List any platforms that this version of perl compiles on, that previous
265 versions did not. These will either be enabled by new files in the F<hints/>
266 directories, or new subdirectories and F<README> files at the top level of the
271 =item XXX-some-platform
277 =head2 Discontinued Platforms
279 XXX List any platforms that this version of perl no longer compiles on.
283 =item XXX-some-platform
289 =head2 Platform-Specific Notes
291 XXX List any changes for specific platforms. This could include configuration
292 and compilation changes or changes in portability/compatibility. However,
293 changes within modules for platforms should generally be listed in the
294 L</Modules and Pragmata> section.
298 =item XXX-some-platform
304 =head1 Internal Changes
306 XXX Changes which affect the interface available to C<XS> code go here.
307 Other significant internal changes for future core maintainers should
310 [ List each change as a =item entry ]
320 =head1 Selected Bug Fixes
322 XXX Important bug fixes in the core language are summarised here.
323 Bug fixes in files in F<ext/> and F<lib/> are best summarised in
324 L</Modules and Pragmata>.
326 [ List each fix as a =item entry ]
336 =head1 Known Problems
338 XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
339 tests that had to be C<TODO>ed for the release would be noted here, unless
340 they were specific to a particular platform (see below).
342 This is a list of some significant unfixed bugs, which are regressions
343 from either 5.XXX.XXX or 5.XXX.XXX.
345 [ List each fix as a =item entry ]
357 XXX If any significant core contributor has died, we've added a short obituary
360 =head1 Acknowledgements
362 XXX Generate this with:
364 perl Porting/acknowledgements.pl v5.15.6..HEAD
366 =head1 Reporting Bugs
368 If you find what you think is a bug, you might check the articles
369 recently posted to the comp.lang.perl.misc newsgroup and the perl
370 bug database at http://rt.perl.org/perlbug/ . There may also be
371 information at http://www.perl.org/ , the Perl Home Page.
373 If you believe you have an unreported bug, please run the L<perlbug>
374 program included with your release. Be sure to trim your bug down
375 to a tiny but sufficient test case. Your bug report, along with the
376 output of C<perl -V>, will be sent off to perlbug@perl.org to be
377 analysed by the Perl porting team.
379 If the bug you are reporting has security implications, which make it
380 inappropriate to send to a publicly archived mailing list, then please send
381 it to perl5-security-report@perl.org. This points to a closed subscription
382 unarchived mailing list, which includes
383 all the core committers, who will be able
384 to help assess the impact of issues, figure out a resolution, and help
385 co-ordinate the release of patches to mitigate or fix the problem across all
386 platforms on which Perl is supported. Please only use this address for
387 security issues in the Perl core, not for modules independently
392 The F<Changes> file for an explanation of how to view exhaustive details
395 The F<INSTALL> file for how to build Perl.
397 The F<README> file for general stuff.
399 The F<Artistic> and F<Copying> files for copyright information.