2012年2月23日

[installer 3123] perl-5.15.8

perl-5.15.8 出ています。

☆ perl-5.15.8
http://www.perl.com/CPAN/src/
http://www.cpan.org/src/5.0/perl-5.15.8.tar.gz

NAME
perldelta - what is new for perl v5.15.8


DESCRIPTION
This document describes differences between the 5.15.7 release and the
5.15.8 release.

If you are upgrading from an earlier release such as 5.15.6, first read
perl5157delta, which describes differences between 5.15.6 and 5.15.7.

Notice
This space intentionally left blank.

Core Enhancements
Improved ability to mix locales and Unicode, including UTF-8 locales
An optional parameter has been added to "use locale"

use locale ':not_characters';

which tells Perl to use all but the "LC_CTYPE" and "LC_COLLATE" portions
of the current locale. Instead, the character set is assumed to be
Unicode. This allows locales and Unicode to be seamlessly mixed,
including the increasingly frequent UTF-8 locales. When using this
hybrid form of locales, the ":locale" layer to the open pragma can be
used to interface with the file system, and there are CPAN modules
available for ARGV and environment variable conversions.

Full details are in perllocale.

New function "fc" and corresponding escape sequence "\F" for Unicode foldcase
Unicode foldcase is an extension to lowercase that gives better results
when comparing two strings case-insensitively. It has long been used
internally in regular expression "/i" matching. Now it is available
explicitly through the new "fc" function call (enabled by "use feature
'fc'", or "use v5.16", or explicitly callable via "CORE::fc") or through
the new "\F" sequence in double-quotish strings.

Full details are in "fc" in perlfunc.

"_" in subroutine prototypes
The "_" character in subroutine prototypes is now allowed before "@" or
"%".

Supports (*almost*) Unicode 6.1
Besides the addition of whole new scripts, and new characters in
existing scripts, this new version of Unicode, as always, makes some
changes to existing characters. One change that may trip up some
applications is that the General Category of two characters in the
Latin-1 range, PILCROW SIGN and SECTION SIGN, has been changed from
Other_Symbol to Other_Punctuation. The same change has been made for a
character in each of Tibetan, Ethiopic, and Aegean. The code points
U+3248..U+324F (CIRCLED NUMBER TEN ON BLACK SQUARE through CIRCLED
NUMBER EIGHTY ON BLACK SQUARE) have had their General Category changed
from Other_Symbol to Other_Numeric. The Line Break property has changes
for Hebrew and Japanese; and as a consequence of other changes in 6.1,
the Perl regular expression construct "\X" now works differently for
some characters in Thai and Lao.

New aliases (synonyms) have been defined for many property values;
these, along with the previously existing ones, are all cross indexed in
perluniprops.

The return value of "charnames::viacode()" is affected by other changes:

Code point Old Name New Name
U+000A LINE FEED (LF) LINE FEED
U+000C FORM FEED (FF) FORM FEED
U+000D CARRIAGE RETURN (CR) CARRIAGE RETURN
U+0085 NEXT LINE (NEL) NEXT LINE
U+008E SINGLE-SHIFT 2 SINGLE-SHIFT-2
U+008F SINGLE-SHIFT 3 SINGLE-SHIFT-3
U+0091 PRIVATE USE 1 PRIVATE USE-1
U+0092 PRIVATE USE 2 PRIVATE USE-2
U+2118 SCRIPT CAPITAL P WEIERSTRASS ELLIPTIC FUNCTION

Perl will accept any of these names as input, but "charnames::viacode()"
now returns the new name of each pair. The change for U+2118 is
considered by Unicode to be a correction, that is the original name was
a mistake (but again, it will remain forever valid to use it to refer to
U+2118). But most of these changes are the fallout of the mistake
Unicode 6.0 made in naming a character used in Japanese cell phones to
be "BELL", which conflicts with the long standing industry use of (and
Unicode's recommendation to use) that name to mean the ASCII control
character at U+0007. As a result, that name has been deprecated in Perl
since v5.14; and any use of it will raise a warning message (unless
turned off). The name "ALERT" is now the preferred name for this code
point, with "BEL" being an acceptable short form. The name for the new
cell phone character, at code point U+1F514, remains undefined in this
version of Perl (hence we don't quite implement all of Unicode 6.1), but
starting in v5.18, BELL will mean this character, and not U+0007.

Unicode has taken steps to make sure that this sort of mistake does not
happen again. The Standard now includes all the generally accepted names
and abbreviations for control characters, whereas previously it didn't
(though there were recommended names for most of them, which Perl used).
This means that most of those recommended names are now officially in
the Standard. Unicode did not recommend names for the four code points
listed above between U+008E and U+008F, and in standardizing them
Unicode subtly changed the names that Perl had previously given them, by
replacing the final blank in each name by a hyphen. Unicode also
officially accepts names that Perl had deprecated, such as FILE
SEPARATOR. Now the only deprecated name is BELL. Finally, Perl now uses
the new official names instead of the old (now considered obsolete)
names for the first four code points in the list above (the ones which
have the parentheses in them).

Now that the names have been placed in the Unicode standard, these kinds
of changes should not happen again, though corrections, such as to
U+2118, are still possible.

Unicode also added some name abbreviations, which Perl now accepts: SP
for SPACE; TAB for CHARACTER TABULATION; NEW LINE, END OF LINE, NL, and
EOL for LINE FEED; LOCKING-SHIFT ONE for SHIFT OUT; LOCKING-SHIFT ZERO
for SHIFT IN; and ZWNBSP for ZERO WIDTH NO-BREAK SPACE.

More details on this version of Unicode are provided in
< http://www.unicode.org/versions/Unicode6.1.0/>;.

Added "is_utf8_char_buf()"
This function is designed to replace the deprecated "is_utf8_char()"
function. It includes an extra parameter to make sure it doesn't read
past the end of the input buffer.

Security
Use "is_utf8_char_buf()" and not "is_utf8_char()"
The latter function is now deprecated because its API is insufficient to
guarantee that it doesn't read (up to 12 bytes in the worst case) beyond
the end of its input string. See is_utf8_char_buf().

Incompatible Changes
[ List each incompatible change as a =head2 entry ]

Special blocks called in void context
Special blocks ("BEGIN", "CHECK", "INIT", "UNITCHECK", "END") are now
called in void context. This avoids wasteful copying of the result of
the last statement [perl #108794].

The "overloading" pragma and regexp objects
With "no overloading", regular expression objects returned by "qr//" are
now stringified as "Regexp=REGEXP(0xbe600d)" instead of the regular
expression itself [perl #108780].

Two XS typemap Entries removed
Two presumably unused XS typemap entries have been removed from the core
typemap: T_DATAUNIT and T_CALLBACK. If you are, against all odds, a user
of these, please see the instructions on how to regain them in
perlxstypemap.

Unicode 6.1 has incompatibilities with Unicode 6.0
These are detailed in "Supports (almost) Unicode 6.1" above.

Changed returns for some properties in "Unicode::UCD::prop_invmap()"
The return values for "prop_invmap" have been changed for some
properties to make the returned lists significantly smaller. This allows
those lists to be searched faster.

This function was introduced earlier in the v5.15 series of releases,
and the API will not be considered stable until v5.16.

See "prop_invmap()" in Unicode::UCD for details on the new interface.

$$ and "getppid()" no longer emulate POSIX semantics under LinuxThreads
The POSIX emulation of $$ and "getppid()" under the obsolete
LinuxThreads implementation has been removed (the $$ emulation was
actually removed in v5.15.0). This only impacts users of Linux 2.4 and
users of Debian GNU/kFreeBSD up to and including 6.0, not the vast
majority of Linux installations that use NPTL threads.

This means that "getppid()" like $$ is now always guaranteed to return
the OS's idea of the current state of the process, not perl's cached
version of it.

See the documentation for $$ for details.

$<, $>, $( and $) are no longer cached
Similarly to the changes to $$ and "getppid()" the internal caching of
$<, $>, $( and $) has been removed.

When we cached these values our idea of what they were would drift out
of sync with reality if someone (e.g. someone embedding perl) called
sete?[ug]id() without updating "PL_e?[ug]id". Having to deal with this
complexity wasn't worth it given how cheap the "gete?[ug]id()" system
call is.

This change will break a handful of CPAN modules that use the XS-level
"PL_uid", "PL_gid", "PL_euid" or "PL_egid" variables.

The fix for those breakages is to use "PerlProc_gete?[ug]id()" to
retrieve them (e.g. "PerlProc_getuid()"), and not to assign to
"PL_e?[ug]id" if you change the UID/GID/EUID/EGID. There is no longer
any need to do so since perl will always retrieve the up-to-date version
of those values from the OS.

Which Non-ASCII characters get quoted by "quotemeta" and "\Q" has changed
This is unlikely to result in a real problem, as Perl does not attach
special meaning to any non-ASCII character, so it is currently
irrelevant which are quoted or not. This change fixes bug [perl #77654]
and bring Perl's behavior more into line with Unicode's recommendations.
See "quotemeta" in perlfunc.

Deprecations
"is_utf8_char()"
This function is deprecated because it could read beyond the end of the
input string. Use the new is_utf8_char_buf() instead.

Modules and Pragmata
New Modules and Pragmata
* "PerlIO::mmap" 0.010 has been added to the Perl core.

The "mmap" PerlIO layer is no longer implemented by perl itself, but
has been moved out into the new PerlIO::mmap module.

Updated Modules and Pragmata
* arybase has been upgraded from version 0.03 to version 0.04.

List slices no longer modify items on the stack belonging to outer
lists [perl #109570].

* B has been upgraded from version 1.33 to version 1.34.

"B::COP" now has a "stashflags" method, corresponding to a new
internal field added in 5.15.4 [perl #108860].

* "B::Deparse" has been upgraded from version 1.11 to 1.12.

* Carp has been upgraded from version 1.24 to version 1.25.

It now puts a dot after the file and line number, just like errors
from "die" [perl #106538].

* "Compress::Raw::Bzip2" has been upgraded from version 2.045 to
2.048.

* "Compress::Raw::Zlib" has been upgraded from version 2.045 to 2.048.

* Compress::Zlib has been upgraded from version 2.046 to version
2.048.

* "CPAN::Meta" has been upgraded from version 2.113640 to 2.120351.

Work around a memory leak bug involving version objects in boolean
context.

* "CPAN::Meta::YAML" has been upgraded from version 0.005 to 0.007.

* "CPANPLUS" has been upgraded from version 0.9116 to 0.9118.

* "CPANPLUS::Dist::Build" has been upgraded from version 0.60 to 0.62.

* "Data::Dumper" has been upgraded from version 2.135_04 to 2.135_05.

* "DB_File" has been upgraded from version 1.824 to 1.826.

* "diagnostics" has been upgraded from version 1.27 to 1.28.

When searching for perldiag.pod, it no longer uses paths that were
only relevant on Perl 5.004 and earlier.

* "English" has been upgraded from version 1.04 to 1.05.

* "ExtUtils::Install" has been upgraded from version 1.57 to 1.58.

* "ExtUtils::ParseXS" has been upgraded from version 3.12 to 3.16.

The new version comes with important tools for sharing typemaps
between different CPAN distributions.

* "File::Copy" has been upgraded from version 2.21 to 2.23.

It no longer emits warnings when copying files with newlines in
their names [perl #109104].

* "File::Glob" has been upgraded from version 1.16 to 1.17.

* "Filter::Util::Call" has been upgraded from version 1.39 to 1.40.

* "IPC::Cmd" has been upgraded from version 0.72 to 0.76.

* "Math::Complex" has been upgraded from version 1.58 to 1.59.

This avoids a new core warning.

* "Module::Metadata" has been upgraded from version 1.000007 to
1.000009.

Adds "provides" method to generate a CPAN META provides data
structure correctly; use of "package_versions_from_directory" is
discouraged.

* "Opcode" has been upgraded from version 1.22 to 1.23.

* "overload" has been upgraded from version 1.17 to 1.18.

* "Parse::CPAN::Meta" has been upgraded from version 1.4401 to 1.4402.

* "perlfaq" has been upgraded from version 5.0150038 to 5.0150039.

* "Pod::Functions" has been upgraded from version 1.04 to 1.05.

Functions.pm is now generated at perl build time from annotations in
perlfunc.pod. This will ensure that Pod::Functions and perlfunc
remain in synchronisation.

* "Pod::Html" has been upgraded from version 1.13 to 1.14.

* "Pod::Parser" has been upgraded from version 1.37 to 1.51.

* "POSIX" has been upgraded from version 1.28 to 1.30.

* "re" has been upgraded from version 0.18 to 0.19.

* "Safe" has been upgraded from version 2.30 to 2.31.

* "Socket" has been upgraded from version 1.97 to 1.98.

* "Term::Cap" has been upgraded from version 1.12 to 1.13.

* "Term::ReadLine" has been upgraded from version 1.07 to 1.08.

Term::ReadLine now supports any event loop, including unpublished
ones and simple IO::Select loops without the need to rewrite
existing code for any particular framework [perl #108470].

* "Time::HiRes" has been upgraded from version 1.9724 to 1.9725.

"Time::HiRes::stat()" no longer corrupts the Perl stack.

* "Unicode::UCD" has been upgraded from version 0.39 to 0.41.

The only change is to fix a formatting error in the Pod.

* "Version::Requirements" has been upgraded from version 0.101021 to
0.101022.

* "warnings" has been upgraded from version 1.12 to 1.13.

* "XS::Typemap" has been upgraded from version 0.07 to 0.08.

Documentation
New Documentation
perlxstypemap
The new manual describes the XS typemapping mechanism in unprecedented
detail and combines new documentation with information extracted from
perlxs and the previously unofficial list of all core typemaps.

Testing
* t/porting/pending-author.t has been added, to avoid the problem of
"make test" passing 100%, but the subsequent git commit causing
t/porting/authors.t to fail, because it uses a "new" e-mail address.

This test is only run if one is building inside a git checkout, and
one has made local changes. Otherwise it's skipped.

* t/porting/perlfunc.t has been added, to test that changes to
pod/perlfunc.pod do not inadvertently break the build of
Pod::Functions.

* The test suite for typemaps has been extended to cover a larger
fraction of the core typemaps.

Platform Support
Platform-Specific Notes
Cygwin
Since version 1.7, Cygwin supports native UTF-8 paths. If Perl is
built under that environment, directory and filenames will be UTF-8
encoded.

Cygwin does not initialize all original Win32 environment variables.
See README.cygwin for a discussion of "Cygwin::sync_winenv()" and
further links.

VMS The build on VMS now allows names of the resulting symbols in C code
for Perl longer than 31 characters. Symbols like
"Perl__it_was_the_best_of_times_it_was_the_worst_of_times" can now
be created freely without causing the VMS linker to seize up.

Selected Bug Fixes
* "~~" now correctly handles the precedence of Any~~Object, and is not
tricked by an overloaded object on the left-hand side.

* "stat _" no longer warns about unopened filehandles [perl #71002].

* "stat" on an unopened filehandle now warns consistently, instead of
skipping the warning at times.

* A change in an earlier 5.15 release caused warning hints to
propagate into "do $file". This has been fixed [rt.cpan.org #72767].

* Starting with 5.12.0, Perl used to get its internal bookkeeping
muddled up after assigning "${ qr// }" to a hash element and locking
it with Hash::Util. This could result in double frees, crashes or
erratic behaviour.

* In 5.15.7, some typeglobs in the CORE namespace were made read-only
by mistake. This has been fixed [rt.cpan.org #74289].

* "-t" now works when stacked with other filetest operators [perl
#77388].

* Stacked filetest operators now only call FETCH once on a tied
argument.

* "/.*/g" would sometimes refuse to match at the end of a string that
ends with "\n". This has been fixed [perl #109206].

* "m/[[:ascii:]]/i" and "/\p{ASCII}/i" now match identically (when not
under a differing locale). This fixes a regression introduced in
5.14 in which the first expression could match characters outside of
ASCII, such as the KELVIN SIGN.

* Method calls whose arguments were all surrounded with "my()" or
"our()" (as in "$object->method(my($a,$b))") used to force lvalue
context on the subroutine. This would prevent lvalue methods from
returning certain values. Due to lvalue fixes earlier in the 5.15.x
series, it would also prevent non-lvalue methods from being called
[perl #109264].

* The "SvPVutf8" C function no longer tries to modify its argument,
resulting in errors [perl #108994].

* "SvPVutf8" now works properly with magical variables.

* "SvPVbyte" now works properly non-PVs.

* "/[[:ascii:]]/" and "/[[:blank:]]/" now use locale rules under "use
locale" when the platform supports that. Previously, they used the
platform's native character set.

* A regression introduced in 5.13.6 was fixed. This involved an
inverted bracketed character class in a regular expression that
consisted solely of a Unicode property, that property wasn't getting
inverted outside the Latin1 range.

* "quotemeta" now quotes consistently the same non-ASCII characters
under "use feature 'unicode_strings'", regardless of whether the
string is encoded in UTF-8 or not, hence fixing the last vestiges
(we hope) of the infamous "The "Unicode Bug"" in perlunicode. [perl
#77654].

Which of these code points is quoted has changed, based on Unicode's
recommendations. See "quotemeta" in perlfunc for details.

Known Problems
This is a list of some significant unfixed bugs, which are regressions
from either 5.14.0 or 5.15.7.

* "eval { 'fork()' }" is broken on Windows [perl #109718]

This is a known test failure to be fixed before 5.16.0.

Acknowledgements
Perl 5.15.8 represents approximately 4 weeks of development since Perl
5.15.7 and contains approximately 61,000 lines of changes across 480
files from 36 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 5.15.8:

Abhijit Menon-Sen, Alan Haggai Alavi, Alexandr Ciornii, Andy Dougherty,
Brian Fraser, Chris 'BinGOs' Williams, Craig A. Berry, Darin McBride,
Dave Rolsky, David Golden, David Leadbeater, David Mitchell, Dominic
Hargreaves, Eric Brine, Father Chrysostomos, Florian Ragwitz, H.Merijn
Brand, Juerd Waalboer, Karl Williamson, Leon Timmermans, Marc Green, Max
Maischein, Nicholas Clark, Paul Evans, Rafael Garcia-Suarez, Rainer
Tammer, Reini Urban, Ricardo Signes, Robin Barker, Shlomi Fish, Steffen
Mueller, Todd Rinaldo, Tony Cook, Yves Orton, Zefram, AEvar Arnfjoroー
Bjarmason.

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@xxxxx 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@xxxxx 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.

----
こがよういちろう


投稿者 xml-rpc : 2012年2月23日 13:33
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