=encoding utf8 =head1 NAME [ 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 v5.13.10 =head1 DESCRIPTION This document describes differences between the 5.XXX.XXX release and the 5.XXX.XXX release. If you are upgrading from an earlier release such as 5.YYY.YYY, first read L, which describes differences between 5.ZZZ.ZZZ and 5.YYY.YYY. =head1 Notice XXX Any important notices here =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 section. [ List each enhancement as a =head2 entry ] =head2 Add C<\p{Titlecase}> as a synonym for C<\p{Title}> This synyom is added for symmetry with the Unicode property names C<\p{Uppercase}> and C<\p{Lowercase}>. =head2 New regular expression modifier option C Doubling the C regular expression modifier increases its effect, so that in case-insensitive matching, no ASCII character will match a non-ASCII character. For example, normally, 'k' =~ /\N{KELVIN SIGN}/ will match; it won't under C. Note that like C, C in 5.14 will not actually be able to be used as a suffix at the end of a regular expression. =head1 Security XXX Any security-related notices go here. In particular, any security vulnerabilities closed should be noted here rather than in the L section. [ List each security issue as a =head2 entry ] =head1 Incompatible Changes XXX For a release on a stable branch, this section aspires to be: There are no changes intentionally incompatible with 5.XXX.XXX. If any exist, they are bugs and reports are welcome. [ List each incompatible change as a =head2 entry ] =head2 Most C<\p{}> properties are now immune from case-insensitive matching For most Unicode properties, it doesn't make sense to have them match differently under C case-insensitive matching than not. And doing so leads to unexpected results and potential security holes. For example m/\p{ASCII_Hex_Digit}+/i could previously match non-ASCII characters because of the Unicode matching rules. There were a number of bugs in this feature until an earlier release in the 5.13 series. Now this release reverts, and removes the feature completely except for the few properties where people have come to expect it, namely the ones where casing is an integral part of their functionality, such as C and C, both of which match the exact same code points, namely those matched by C. Details are in L. User-defined property handlers that need to match differently under C must change to read the new boolean parameter passed it which is non-zero if case-insensitive matching is in effect; 0 if not. See L. =head1 Deprecations XXX Any deprecated features, syntax, modules etc. should be listed here. In particular, deprecated modules should be listed here even if they are listed as an updated module in the L section. [ List each deprecation as a =head2 entry ] =head1 Performance Enhancements XXX Changes which enhance performance without changing behaviour go here. There may well be none in a stable release. [ List each enhancement as a =item entry ] =over 4 =item * XXX =back =head1 Modules and Pragmata XXX All changes to installed files in F, F, F and F go here. If Module::CoreList is updated, generate an initial draft of the following sections using F, which prints stub entries to STDOUT. Results can be pasted in place of the '=head2' entries below. A paragraph summary for important changes should then be added by hand. In an ideal world, dual-life modules would have a F file that could be cribbed. [ Within each section, list entries as a =item entry ] =head2 New Modules and Pragmata =over 4 =item * C version 0.101020 has been added as a dual-life module. It provides a standard library to model and manipulates module prerequisites and version constraints as defined in the L. =back =head2 Updated Modules and Pragmata =over 4 =item * C has been upgraded from version 3.51 to 3.52 =item * C has been upgraded from version 0.9011 to 0.91 Includes support for META.json and MYMETA.json and a change to using Digest::SHA for CPAN checksums. =item * C has been upgraded from version 0.68 to 0.70 =item * C has been upgraded from version 0.009 to 0.010 =item * C has been upgraded from version 0.3607 to 0.3622. A notable change is the deprecation of several modules. Module::Build::Version has been deprecated and Module::Build now relies directly upon L. Module::Build::ModuleInfo has been deprecated in favor of a standalone copy of it called L. Module::Build::YAML has been deprecated in favor of L. =item * C has been upgraded from version 0.40 to 0.44 =item * C has been upgraded from version 1.000003 to 1.000004. =item * C has been upgraded from version 1.40 to 1.4401. The latest Parse::CPAN::Meta can now read YAML or JSON files using L and L, which are now part of the Perl core. =item * C has been upgraded from version 0.24 to 0.26 =item * C has been upgraded from version 0.68 to 0.72 This also sees the switch from using the pure-perl version of this module to the XS version.` =item * XXX =back =head2 Removed Modules and Pragmata =over 4 =item * XXX =back =head1 Documentation XXX Changes to files in F go here. Consider grouping entries by file and be sure to link to the appropriate page, e.g. L. =head2 New Documentation XXX Changes which create B files in F go here. =head3 L XXX Description of the purpose of the new file here =head2 Changes to Existing Documentation XXX Changes which significantly change existing files in F go here. However, any changes to F should go in the L section. =head3 L and perlrepository =over 4 =item * The L and perlrepository documents have been heavily edited and split up into several new documents. The L document is now much shorter, and focuses on the Perl 5 development process and submitting patches to Perl. The technical content has been moved to several new documents, L, L, L, and L. This technical content has only been lightly edited. The perlrepository document has been renamed to L. This new document is just a how-to on using git with the Perl source code. Any other content that used to be in perlrepository has been moved to perlhack. =back =head1 Diagnostics The following additions or changes have been made to diagnostic output, including warnings and fatal error messages. For the complete list of diagnostic messages, see L. XXX New or changed warnings emitted by the core's C code go here. Also include any changes in L that reconcile it to the C code. [ Within each section, list entries as a =item entry ] =head2 New Diagnostics XXX Newly added diagnostic messages go here =over 4 =item "\b{" is deprecated; use "\b\{" instead =item "\B{" is deprecated; use "\B\{" instead Use of an unescaped "{" immediately following a C<\b> or C<\B> is now deprecated so as to reserve its use for Perl itself in a future release. =back =head2 Changes to Existing Diagnostics XXX Changes (i.e. rewording) of diagnostic messages go here =over 4 =item * XXX =back =head1 Utility Changes XXX Changes to installed programs such as F and F go here. Most of these are built within the directories F and F. [ List utility changes as a =head3 entry for each utility and =item entries for each change Use L with program names to get proper documentation linking. ] =head3 L =over 4 =item * XXX =back =head1 Configuration and Compilation XXX Changes to F, F, F, and analogous tools go here. Any other changes to the Perl build process should be listed here. However, any platform-specific changes should be listed in the L section, instead. [ List changes as a =item entry ]. =over 4 =item * XXX =back =head1 Testing XXX Any significant changes to the testing of a freshly built perl should be listed here. Changes which create B files in F go here as do any large changes to the testing harness (e.g. when parallel testing was added). Changes to existing files in F aren't worth summarising, although the bugs that they represent may be covered elsewhere. [ List each test improvement as a =item entry ] =over 4 =item * XXX =back =head1 Platform Support XXX Any changes to platform support should be listed in the sections below. [ Within the sections, list each platform as a =item entry with specific changes as paragraphs below it. ] =head2 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 directories, or new subdirectories and F files at the top level of the source tree. =over 4 =item XXX-some-platform XXX =back =head2 Discontinued Platforms XXX List any platforms that this version of perl no longer compiles on. =over 4 =item XXX-some-platform XXX =back =head2 Platform-Specific Notes XXX List any changes for specific platforms. This could include configuration and compilation changes or changes in portability/compatibility. However, changes within modules for platforms should generally be listed in the L section. =over 4 =item Windows =over 4 =item * The C build target now depends on F to allow the F test to run successfully. =back =back =head1 Internal Changes XXX Changes which affect the interface available to C code go here. Other significant internal changes for future core maintainers should be noted as well. [ List each test improvement as a =item entry ] =over 4 =item * XXX =back =head1 Selected Bug Fixes XXX Important bug fixes in the core language are summarised here. Bug fixes in files in F and F are best summarised in L. [ List each fix as a =item entry ] =over 4 =item * A Unicode C<\p{}> property match in a regular rexpression pattern will now force Unicode rules for the rest of the regular expression =back =head1 Known Problems XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any tests that had to be Ced 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.XXX.XXX or 5.XXX.XXX. [ List each fix as a =item entry ] =over 4 =item * XXX =back =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 L 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, 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 file for an explanation of how to view exhaustive details on what changed. The F file for how to build Perl. The F file for general stuff. The F and F files for copyright information. =cut