TCP/IP stacks of VMS: we do not know since we weren't able to test
Perl in such configurations.
+=head2 Different Definition of the Unicode Character Classes \p{In...}
+
+As suggested by the Unicode consortium, the Unicode character classes
+now prefer I<scripts> as opposed to I<blocks> (as defined by Unicode);
+in Perl, when the C<\p{In....}> and the C<\p{In....}> regular expression
+constructs are used. This has changed the definition of some of those
+character classes.
+
+The difference between scripts and blocks is that scripts are the
+glyphs used by a language or a group of languages, while the blocks
+are more artificial groupings of 256 characters based on the Unicode
+numbering.
+
+In general this change results in more inclusive Unicode character
+classes, but changes to the other direction also do take place:
+for example while the script C<Latin> includes all the Latin
+characters and their various diacritic-adorned versions, it
+does not include the various punctuation or digits (since they
+are not solely C<Latin>).
+
+Changes in the character class semantics may have happened if a script
+and a block happen to have the same name, for example C<Hebrew>.
+In such cases the script wins and C<\p{InHebrew}> now means the script
+definition of Hebrew. The block definition in still available,
+though, by appending C<Block> to the name: C<\p{InHebrewBlock}> means
+what C<\p{InHebrew}> meant in perl 5.6.0. For the full list
+of affected character classes, see L<perlunicode/Blocks>.
+
=head2 Deprecations
The current user-visible implementation of pseudo-hashes (the weird
=item *
-GMAGIC (right-hand side magic) could in many cases such as concatenation
-of string be invoked too many times.
+GMAGIC (right-hand side magic) could in many cases such as string
+concatenation be invoked too many times.
=item *
=item *
-The MAGIC constants (e.g. C<'P'>) have been macrofied
-(e.g. C<PERL_MAGIC_TIED>) for better source code readability
-and maintainability.
+The C<op_clear> and C<op_null> are now exported.
=item *
-The C<op_clear> and C<op_null> are now exported.
+A new special regular expression variable has been introduced:
+C<$^N>, which contains the most-recently closed group (submatch).
=item *
=head1 Modules and Pragmata
-=head2 New Modules and Distribution
+=head2 New Modules and Distributions
=over 4
(Previously known as L<Time::Object>.)
+=item *
+
+L<Time::Seconds> - a simple API to convert seconds to other date values
+
+=item *
+
+L<Unicode::UCD> - Unicode Character Database
+
=back
=head2 Updated And Improved Modules and Pragmata
L<perlhack>. There is a make target "perl.gprof" for generating a
gprofiled Perl executable.
-=item *
-
-(Code documentation) F<perly.c> and F<sv.c> have now been extensively
-commented.
-
=back
=head1 Installation and Configuration Improvements
=item *
-The C code has been made much more C<gcc -Wall> clean. Some warning
-messages still remain, though, so if you are compiling with gcc you
-will see some warnings about dubious practices. The warnings are
-being worked on.
-
-=item *
-
In AFS installations one can configure the root of the AFS to be
somewhere else than the default F</afs> by using the Configure
parameter C<-Dafsroot=/some/where/else>.
=back
-=head1 Changed Internals
+=head1 Source Code Enhancements
+
+=head2 MAGIC constants
+
+The MAGIC constants (e.g. C<'P'>) have been macrofied
+(e.g. C<PERL_MAGIC_TIED>) for better source code readability
+and maintainability.
+
+=head2 Better commented code
+
+F<perly.c>, F<sv.c>, and F<sv.h> have now been extensively commented.
=head2 Regex pre-/post-compilation items matched up
C<offsets> member of the C<struct regexp>. See L<perldebguts> for more
complete information.
+=head2 gcc -Wall
+
+The C code has been made much more C<gcc -Wall> clean. Some warning
+messages still remain, though, so if you are compiling with gcc you
+will see some warnings about dubious practices. The warnings are
+being worked on.
+
=head1 New Tests
Several new tests have been added, especially for the F<lib> subsection.
No known fix.
+=head2 OS/390
+
+OS/390 has rather many test failures but the situation is actually
+better than it was in 5.6.0, it's just that so many new modules and
+tests have been added.
+
+ Failed Test Stat Wstat Total Fail Failed List of Failed
+ -----------------------------------------------------------------------------
+ ../ext/B/Deparse.t 14 1 7.14% 14
+ ../ext/B/Showlex.t 1 1 100.00% 1
+ ../ext/Encode/Encode/Tcl.t 610 13 2.13% 592 594 596 598
+ 600 602 604-610
+ ../ext/IO/lib/IO/t/io_unix.t 113 28928 5 3 60.00% 3-5
+ ../ext/POSIX/POSIX.t 29 1 3.45% 14
+ ../ext/Storable/t/lock.t 255 65280 5 3 60.00% 3-5
+ ../lib/locale.t 129 33024 117 19 16.24% 99-117
+ ../lib/warnings.t 434 1 0.23% 75
+ ../lib/ExtUtils.t 27 1 3.70% 25
+ ../lib/Math/BigInt/t/bigintpm.t 1190 1 0.08% 1145
+ ../lib/Unicode/UCD.t 81 48 59.26% 1-16 49-64 66-81
+ ../lib/User/pwent.t 9 1 11.11% 4
+ op/pat.t 660 6 0.91% 242-243 424-425
+ 626-627
+ op/split.t 0 9 ?? ?? % ??
+ op/taint.t 174 3 1.72% 156 162 168
+ op/tr.t 70 3 4.29% 50 58-59
+ Failed 16/422 test scripts, 96.21% okay. 105/23251 subtests failed, 99.55% okay.
+
=head2 op/sprintf tests 129 and 130
The op/sprintf tests 129 and 130 are known to fail on some platforms.
Many floating point inaccuracies:
- op/numconvert 511,657,658,659,665-667,831,991,1151
- op/pack 10,22,149,156
- op/sprintf 8,10,13,102-107,134-135,146-153,159-162
- lib/Math/BigInt/bigintpm 1145,1183
- lib/Math/Complex 250,257,514,521,722-724,
- 934,935,945,949,955,956,975,976
- ext/POSIX/POSIX 14
+ op/numconvert 511,657,658,659,665-667,831,991,1151
+ op/pack 10,22,149,156
+ op/sprintf 8,10,13,102-107,134-135,146-153,159-162
+ lib/Math/BigInt/bigintpm 1145,1183
+ lib/Math/Complex 250,257,514,521,722-724,
+ 934,935,945,949,955,956,975,976
+ ext/POSIX/POSIX 14
+
+=head2 VMS
+
+Rather many tests are failing in VMS but that actually more tests
+succeed in VMS than they used to, it's just that there are many,
+many more tests than there used to be.
+
+Here are the known failures from some compiler/platform combinations.
+
+DEC C V5.3-006 on OpenVMS VAX V6.2
+
+ [-.ext.list.util.t]tainted..............FAILED on test 3
+ [-.ext.posix]sigaction..................FAILED on test 7
+ [-.ext.time.hires]hires.................FAILED on test 14
+ [-.lib.file.find]taint..................FAILED on test 17
+ [-.lib.math.bigint.t]bigintpm...........FAILED on test 1183
+ [-.lib.test.simple.t]exit...............FAILED on test 1
+ [.lib]vmsish............................FAILED on test 13
+ [.op]sprintf............................FAILED on test 12
+ Failed 8/399 tests, 91.23% okay.
+
+DEC C V6.0-001 on OpenVMS Alpha V7.2-1
+
+ [-.ext.list.util.t]tainted..............FAILED on test 3
+ [-.lib.file.find]taint..................FAILED on test 17
+ [-.lib.test.simple.t]exit...............FAILED on test 1
+ [.lib]vmsish............................FAILED on test 13
+ Failed 4/399 tests, 92.48% okay.
+
+Compac C V6.4-005 on OpenVMS Alpha 7.2.1
+
+ [-.ext.b]showlex........................FAILED on test 1
+ [-.ext.list.util.t]tainted..............FAILED on test 3
+ [-.lib.file.find]taint..................FAILED on test 17
+ [-.lib.test.simple.t]exit...............FAILED on test 1
+ [.lib]vmsish............................FAILED on test 13
+ [.op]misc...............................FAILED on test 49
+ Failed 6/401 tests, 92.77% okay.
=head2 Localising a Tied Variable Leaks Memory