5 [ this is a template for a new perldelta file. Any text flagged as XXX needs
6 to be processed before release. ]
8 perldelta - what is new for perl v5.35.3
12 This document describes differences between the 5.35.2 release and the 5.35.3
15 If you are upgrading from an earlier release such as 5.35.1, first read
16 L<perl5352delta>, which describes differences between 5.35.1 and 5.35.2.
20 With this release, the experimental C<switch> feature, present in every feature
21 bundle since they were introduced in v5.10, has been removed from the v5.36
22 bundle. If you want to live dangerously and use it, you'll have to enable it
25 =head1 Core Enhancements
27 All warnings are enabled automatically within the scope of
28 a C<L<use v5.35|perlfunc/use VERSION>> (or higher) declaration.
32 XXX Any security-related notices go here. In particular, any security
33 vulnerabilities closed should be noted here rather than in the
34 L</Selected Bug Fixes> section.
36 [ List each security issue as a =head2 entry ]
38 =head1 Incompatible Changes
40 XXX For a release on a stable branch, this section aspires to be:
42 There are no changes intentionally incompatible with 5.XXX.XXX
43 If any exist, they are bugs, and we request that you submit a
44 report. See L</Reporting Bugs> below.
46 [ List each incompatible change as a =head2 entry ]
50 XXX Any deprecated features, syntax, modules etc. should be listed here.
52 =head2 Module removals
54 XXX Remove this section if not applicable.
56 The following modules will be removed from the core distribution in a
57 future release, and will at that time need to be installed from CPAN.
58 Distributions on CPAN which require these modules will need to list them as
61 The core versions of these modules will now issue C<"deprecated">-category
62 warnings to alert you to this fact. To silence these deprecation warnings,
63 install the modules in question from CPAN.
65 Note that these are (with rare exceptions) fine modules that you are encouraged
66 to continue to use. Their disinclusion from core primarily hinges on their
67 necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
68 not usually on concerns over their design.
74 XXX Note that deprecated modules should be listed here even if they are listed
75 as an updated module in the L</Modules and Pragmata> section.
79 [ List each other deprecation as a =head2 entry ]
81 =head1 Performance Enhancements
83 XXX Changes which enhance performance without changing behaviour go here.
84 There may well be none in a stable release.
86 [ List each enhancement as an =item entry ]
96 =head1 Modules and Pragmata
98 XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
99 go here. If Module::CoreList is updated, generate an initial draft of the
100 following sections using F<Porting/corelist-perldelta.pl>. A paragraph summary
101 for important changes should then be added by hand. In an ideal world,
102 dual-life modules would have a F<Changes> file that could be cribbed.
104 The list of new and updated modules is modified automatically as part of
105 preparing a Perl release, so the only reason to manually add entries here is if
106 you're summarising the important changes in the module update. (Also, if the
107 manually-added details don't match the automatically-generated ones, the
108 release manager will have to investigate the situation carefully.)
110 [ Within each section, list entries as an =item entry ]
112 =head2 New Modules and Pragmata
118 XXX Remove this section if not applicable.
122 =head2 Updated Modules and Pragmata
128 L<Text::Tabs> and L<Text::Wrap> have been upgraded from CPAN (Text-Tabs+Wrap)
129 version 2013.0523 to 2021.0804.
133 L<Pod::Html> has been upgraded from version 1.31 to 1.32.
137 L<XXX> has been upgraded from version A.xx to B.yy.
139 If there was something important to note about this change, include that here.
143 =head2 Removed Modules and Pragmata
155 XXX Changes to files in F<pod/> go here. Consider grouping entries by
156 file and be sure to link to the appropriate page, e.g. L<perlfunc>.
158 =head2 New Documentation
160 XXX Changes which create B<new> files in F<pod/> go here.
164 XXX Description of the purpose of the new file here
166 =head2 Changes to Existing Documentation
168 We have attempted to update the documentation to reflect the changes
169 listed in this document. If you find any we have missed, open an issue
170 at L<https://github.com/Perl/perl5/issues>.
172 XXX Changes which significantly change existing files in F<pod/> go here.
173 However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
176 Additionally, the following selected changes have been made:
184 XXX Description of the change here
190 The following additions or changes have been made to diagnostic output,
191 including warnings and fatal error messages. For the complete list of
192 diagnostic messages, see L<perldiag>.
194 XXX New or changed warnings emitted by the core's C<C> code go here. Also
195 include any changes in L<perldiag> that reconcile it to the C<C> code.
197 =head2 New Diagnostics
199 XXX Newly added diagnostic messages go under here, separated into New Errors
208 XXX L<message|perldiag/"message">
218 XXX L<message|perldiag/"message">
222 =head2 Changes to Existing Diagnostics
224 XXX Changes (i.e. rewording) of diagnostic messages go here
230 XXX Describe change here
234 =head1 Utility Changes
236 XXX Changes to installed programs such as F<perldoc> and F<xsubpp> go here.
237 Most of these are built within the directory F<utils>.
239 [ List utility changes as a =head2 entry for each utility and =item
240 entries for each change
241 Use L<XXX> with program names to get proper documentation linking. ]
253 =head1 Configuration and Compilation
255 XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
256 go here. Any other changes to the Perl build process should be listed here.
257 However, any platform-specific changes should be listed in the
258 L</Platform Support> section, instead.
260 [ List changes as an =item entry ].
266 The makedepend step is now run in parallel by using make
268 This reduces the time for
270 time sh ./makedepend MAKE=make cflags
272 from 5 seconds to 2 seconds with MAKEFLAGS=-j8
278 XXX Any significant changes to the testing of a freshly built perl should be
279 listed here. Changes which create B<new> files in F<t/> go here as do any
280 large changes to the testing harness (e.g. when parallel testing was added).
281 Changes to existing files in F<t/> aren't worth summarizing, although the bugs
282 that they represent may be covered elsewhere.
284 XXX If there were no significant test changes, say this:
286 Tests were added and changed to reflect the other additions and changes
289 XXX If instead there were significant changes, say this:
291 Tests were added and changed to reflect the other additions and
292 changes in this release. Furthermore, these significant changes were
295 [ List each test improvement as an =item entry ]
305 =head1 Platform Support
307 XXX Any changes to platform support should be listed in the sections below.
309 [ Within the sections, list each platform as an =item entry with specific
310 changes as paragraphs below it. ]
314 XXX List any platforms that this version of perl compiles on, that previous
315 versions did not. These will either be enabled by new files in the F<hints/>
316 directories, or new subdirectories and F<README> files at the top level of the
321 =item XXX-some-platform
327 =head2 Discontinued Platforms
329 XXX List any platforms that this version of perl no longer compiles on.
333 =item XXX-some-platform
339 =head2 Platform-Specific Notes
341 XXX List any changes for specific platforms. This could include configuration
342 and compilation changes or changes in portability/compatibility. However,
343 changes within modules for platforms should generally be listed in the
344 L</Modules and Pragmata> section.
348 =item XXX-some-platform
354 =head1 Internal Changes
356 XXX Changes which affect the interface available to C<XS> code go here. Other
357 significant internal changes for future core maintainers should be noted as
360 [ List each change as an =item entry ]
370 =head1 Selected Bug Fixes
372 XXX Important bug fixes in the core language are summarized here. Bug fixes in
373 files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
375 [ List each fix as an =item entry ]
385 =head1 Known Problems
387 XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
388 tests that had to be C<TODO>ed for the release would be noted here. Unfixed
389 platform specific bugs also go here.
391 [ List each fix as an =item entry ]
401 =head1 Errata From Previous Releases
407 XXX Add anything here that we forgot to add, or were mistaken about, in
408 the perldelta of a previous release.
414 XXX If any significant core contributor or member of the CPAN community has
415 died, add a short obituary here.
417 =head1 Acknowledgements
419 XXX Generate this with:
421 perl Porting/acknowledgements.pl v5.35.2..HEAD
423 =head1 Reporting Bugs
425 If you find what you think is a bug, you might check the perl bug database
426 at L<https://github.com/Perl/perl5/issues>. There may also be information at
427 L<http://www.perl.org/>, the Perl Home Page.
429 If you believe you have an unreported bug, please open an issue at
430 L<https://github.com/Perl/perl5/issues>. Be sure to trim your bug down to a
431 tiny but sufficient test case.
433 If the bug you are reporting has security implications which make it
434 inappropriate to send to a public issue tracker, then see
435 L<perlsec/SECURITY VULNERABILITY CONTACT INFORMATION>
436 for details of how to report the issue.
440 If you wish to thank the Perl 5 Porters for the work we had done in Perl 5,
441 you can do so by running the C<perlthanks> program:
445 This will send an email to the Perl 5 Porters list with your show of thanks.
449 The F<Changes> file for an explanation of how to view exhaustive details on
452 The F<INSTALL> file for how to build Perl.
454 The F<README> file for general stuff.
456 The F<Artistic> and F<Copying> files for copyright information.