Chris Williams > perl-5.17.9 > perldelta

Download:
perl-5.17.9.tar.gz

Annotate this POD

Website

Source   Latest Release: perl-5.20.1-RC1

NAME ^

perldelta - what is new for perl v5.17.9

DESCRIPTION ^

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 5.17.7, first read perl5178delta, which describes differences between 5.17.7 and 5.17.8.

Core Enhancements ^

Interpolations now Accepted in Regular Expression Set Operations

Perl v5.17.8 introduced regular expression set operations. They have now been expanded to allow the interpolation of a previously-compiled set into a bigger set, like this:

 my $thai_or_lao = qr/\p{Thai} + \p{Lao}/;
 ...
 qr/(?[ \p{Digit} & $thai_or_lao ])/;

Incompatible Changes ^

$ENV{foo} = undef no longer deletes value from environ

5.17.3 Introduced a change where assiging undef to an %ENV key was equivalent to delete $ENV{foo}.

This release reverts that change.

Deprecations ^

The deprecation of lexical $_ in 5.17.7 has been commuted. The feature is now marked experimental.

Deprecated pragma

encoding

This module is deprecated under perl 5.18. It uses a mechanism provided by perl that is deprecated under 5.18 and higher, and may be removed in a future version.

Deprecated Modules

The following modules will be removed from the core distribution in a future release, and should be installed from CPAN instead. Distributions on CPAN which require these should add them to their prerequisites. The core versions of these modules warnings will issue a deprecation warning.

You can silence these deprecation warnings by installing the modules in question from CPAN.

Archive::Extract
B::Lint
B::Lint::Debug
CPANPLUS
CPANPLUS::Backend
CPANPLUS::Backend::RV
CPANPLUS::Config
CPANPLUS::Config::HomeEnv
CPANPLUS::Configure
CPANPLUS::Configure::Setup
CPANPLUS::Dist
CPANPLUS::Dist::Autobundle
CPANPLUS::Dist::Base
CPANPLUS::Dist::Build
CPANPLUS::Dist::Build::Constants
CPANPLUS::Dist::MM
CPANPLUS::Dist::Sample
CPANPLUS::Error
CPANPLUS::Internals
CPANPLUS::Internals::Constants
CPANPLUS::Internals::Constants::Report
CPANPLUS::Internals::Extract
CPANPLUS::Internals::Fetch
CPANPLUS::Internals::Report
CPANPLUS::Internals::Search
CPANPLUS::Internals::Source
CPANPLUS::Internals::Source::Memory
CPANPLUS::Internals::Source::SQLite
CPANPLUS::Internals::Source::SQLite::Tie
CPANPLUS::Internals::Utils
CPANPLUS::Internals::Utils::Autoflush
CPANPLUS::Module
CPANPLUS::Module::Author
CPANPLUS::Module::Author::Fake
CPANPLUS::Module::Checksums
CPANPLUS::Module::Fake
CPANPLUS::Module::Signature
CPANPLUS::Selfupdate
CPANPLUS::Shell
CPANPLUS::Shell::Classic
CPANPLUS::Shell::Default
CPANPLUS::Shell::Default::Plugins::CustomSource
CPANPLUS::Shell::Default::Plugins::Remote
CPANPLUS::Shell::Default::Plugins::Source
Devel::InnerPackage
Log::Message
Log::Message::Config
Log::Message::Handlers
Log::Message::Item
Log::Message::Simple
Module::Pluggable
Module::Pluggable::Object
Object::Accessor
Term::UI
Term::UI::History

Deprecated Utilities

The following utilities will be removed from the core distribution in a future release as their associated modules have been deprecated. They will remain available with the applicable CPAN distribution.

cpanp

Included with CPANPLUS.

cpanp-run-perl

Included with CPANPLUS.

cpan2dist

Included with CPANPLUS.

pod2latex

The Pod::LaTeX module was deprecated with 5.17.8.

Five additional characters should be escaped in patterns with /x

When a regular expression pattern is compiled with /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 U+2029 PARAGRAPH SEPARATOR.

Modules and Pragmata ^

New Modules and Pragmata

Updated Modules and Pragmata

Documentation ^

Changes to Existing Documentation

perlsec

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 perldiag.

New Diagnostics

New Warnings

Changes to Existing Diagnostics

Utility Changes ^

corelist

Configuration and Compilation ^

Testing ^

Platform Support ^

Platform-Specific Notes

VMS

The character set for Extended Filename Syntax (EFS) is now enabled by default on VMS. Among other things, this provides better handling of dots in directory names, multiple dots in filenames,and spaces in filenames. To obtain the old behavior, set the logical name DECC$EFS_CHARSET to DISABLE.

MidnightBSD

libc_r was removed from recent versions of MidnightBSD and older versions work better with pthread. Threading is now enabled using pthread which corrects build errors with threading enabled on 0.4-CURRENT.

Internal Changes ^

Selected Bug Fixes ^

Acknowledgements ^

Perl 5.17.9 represents approximately 4 weeks of development since Perl 5.17.8 and contains approximately 42,000 lines of changes across 510 files from 35 authors.

Perl continues to flourish into its third decade thanks to a vibrant community of users and developers. The following people are known to have contributed the improvements that became Perl 5.17.9:

Aaron Crane, Alan Haggai Alavi, Alexandr Ciornii, Andy Dougherty, Brad Gilbert, Chris 'BinGOs' Williams, Christian Hansen, Craig A. Berry, Dagfinn Ilmari Mannsåker, Daniel Dragan, Dave Rolsky, David Golden, David Mitchell, Father Chrysostomos, H.Merijn Brand, James E Keenan, Jan Dubois, Jerry D. Hedden, Jess Robinson, Karl Williamson, Kent Fredric, Leon Timmermans, Lucas Holt, Matthew Horsfall, Nicholas Clark, Peter Martini, Rafael Garcia-Suarez, Ricardo Signes, Smylers, Steffen Müller, Steve Hay, Thomas Sibley, Tobias Leich, Tony Cook.

The list above is almost certainly incomplete as it is automatically generated from version control history. In particular, it does not include the names of the (very much appreciated) contributors who reported issues to the Perl bug tracker.

Many of the changes included in this version originated in the CPAN modules included in Perl's core. We're grateful to the entire CPAN community for helping Perl to flourish.

For a more complete list of all of Perl's historical contributors, please see the AUTHORS file in the Perl source distribution.

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 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 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 will 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.

SEE ALSO ^

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

The INSTALL file for how to build Perl.

The README file for general stuff.

The Artistic and Copying files for copyright information.

syntax highlighting: