More delta info from Perl 5.9.5

p4raw-id: //depot/perl@32158

1 files changed, 256 insertions, 17 deletions

diff --git a/pod/perl5100delta.pod b/pod/perl5100delta.pod
index d33f189cee..7d9dacf0c0 100644
--- a/pod/perl5100delta.pod
+++ b/pod/perl5100delta.pod
@@ -488,15 +488,6 @@ subroutine is defined.
 The C<:unique> attribute has been made a no-op, since its current
 implementation was fundamentally flawed and not threadsafe.
 
-=head2 Scoping of the C<sort> pragma
-
-The C<sort> pragma is now lexically scoped. Its effect used to be global.
-
-=head2 Scoping of C<bignum>, C<bigint>, C<bigrat>
-
-The three numeric pragmas C<bignum>, C<bigint> and C<bigrat> are now
-lexically scoped. (Tels)
-
 =head2 Effect of pragmas in eval
 
 The compile-time value of the C<%^H> hint variable can now propagate into
@@ -599,6 +590,60 @@ C<$foo-E<gt>isa($bar)> lookup.
 
 =head1 Modules and Pragmata
 
+=head2 Pragmata Changes
+
+=over 4
+
+=item C<feature>
+
+The new pragma C<feature> is used to enable new features that might break
+old code. See L</"The C<feature> pragma"> above.
+
+=item C<mro>
+
+This new pragma enables to change the algorithm used to resolve inherited
+methods. See L</"New Pragma, C<mro>"> above.
+
+=item Scoping of the C<sort> pragma
+
+The C<sort> pragma is now lexically scoped. Its effect used to be global.
+
+=item Scoping of C<bignum>, C<bigint>, C<bigrat>
+
+The three numeric pragmas C<bignum>, C<bigint> and C<bigrat> are now
+lexically scoped. (Tels)
+
+=item C<base>
+
+The C<base> pragma now warns if a class tries to inherit from itself.
+(Curtis "Ovid" Poe)
+
+=item C<strict> and C<warnings>
+
+C<strict> and C<warnings> will now complain loudly if they are loaded via
+incorrect casing (as in C<use Strict;>). (Johan Vromans)
+
+=item C<warnings>
+
+The C<warnings> pragma doesn't load C<Carp> anymore. That means that code
+that used C<Carp> routines without having loaded it at compile time might
+need to be adjusted; typically, the following (faulty) code won't work
+anymore, and will require parentheses to be added after the function name:
+
+    use warnings;
+    require Carp;
+    Carp::confess "argh";
+
+=item C<less>
+
+C<less> now does something useful (or at least it tries to). In fact, it
+has been turned into a lexical pragma. So, in your modules, you can now
+test whether your users have requested to use less CPU, or less memory,
+less magic, or maybe even less fat. See L<less> for more. (Joshua ben
+Jore)
+
+=back
+
 =head2 New modules
 
 =over 4
@@ -677,6 +722,95 @@ C<Win32API::File>, by Tye McQueen, has been added (for Windows builds).
 This module provides low-level access to Win32 system API calls for
 files/dirs.
 
+=item *
+
+C<Locale::Maketext::Simple>, needed by CPANPLUS, is a simple wrapper around
+C<Locale::Maketext::Lexicon>. Note that C<Locale::Maketext::Lexicon> isn't
+included in the perl core; the behaviour of C<Locale::Maketext::Simple>
+gracefully degrades when the later isn't present.
+
+=item *
+
+C<Params::Check> implements a generic input parsing/checking mechanism. It
+is used by CPANPLUS.
+
+=item *
+
+C<Term::UI> simplifies the task to ask questions at a terminal prompt.
+
+=item *
+
+C<Object::Accessor> provides an interface to create per-object accessors.
+
+=item *
+
+C<Module::Pluggable> is a simple framework to create modules that accept
+pluggable sub-modules.
+
+=item *
+
+C<Module::Load::Conditional> provides simple ways to query and possibly
+load installed modules.
+
+=item *
+
+C<Time::Piece> provides an object oriented interface to time functions,
+overriding the built-ins localtime() and gmtime().
+
+=item *
+
+C<IPC::Cmd> helps to find and run external commands, possibly
+interactively.
+
+=item *
+
+C<File::Fetch> provide a simple generic file fetching mechanism.
+
+=item *
+
+C<Log::Message> and C<Log::Message::Simple> are used by the log facility
+of C<CPANPLUS>.
+
+=item *
+
+C<Archive::Extract> is a generic archive extraction mechanism
+for F<.tar> (plain, gziped or bzipped) or F<.zip> files.
+
+=item *
+
+C<CPANPLUS> provides an API and a command-line tool to access the CPAN
+mirrors.
+
+=back
+
+=head2 Selected Changes to Core Modules
+
+=over 4
+
+=item C<Attribute::Handlers>
+
+C<Attribute::Handlers> can now report the caller's file and line number.
+(David Feldman)
+
+=item C<B::Lint>
+
+C<B::Lint> is now based on C<Module::Pluggable>, and so can be extended
+with plugins. (Joshua ben Jore)
+
+=item C<B>
+
+It's now possible to access the lexical pragma hints (C<%^H>) by using the
+method B::COP::hints_hash(). It returns a C<B::RHE> object, which in turn
+can be used to get a hash reference via the method B::RHE::HASH(). (Joshua
+ben Jore)
+
+=item C<Thread>
+
+As the old 5005thread threading model has been removed, in favor of the
+ithreads scheme, the C<Thread> module is now a compatibility wrapper, to
+be used in old code only. It has been removed from the default list of
+dynamic extensions.
+
 =back
 
 =head1 Utility Changes
@@ -750,6 +884,22 @@ that use Module::Build's framework of configurability (that is,
 C<*::ConfigData> modules that contain local configuration information for
 their parent modules.)
 
+=head2 C<cpanp>
+
+C<cpanp>, the CPANPLUS shell, has been added. (C<cpanp-run-perl>, an
+helper for CPANPLUS operation, has been added too, but isn't intended for
+direct use).
+
+=head2 C<cpan2dist>
+
+C<cpan2dist> is a new utility, that comes with CPANPLUS. It's a tool to
+create distributions (or packages) from CPAN modules.
+
+=head2 C<pod2html>
+
+The output of C<pod2html> has been enhanced to be more customizable via
+CSS. Some formatting problems were also corrected. (Jari Aalto)
+
 =back
 
 =head1 New Documentation
@@ -767,6 +917,9 @@ Perl regular expression engine.
 The L<perlunitut> manpage is an tutorial for programming with Unicode and
 string encodings in Perl, courtesy of Juerd Waalboer.
 
+A new manual page, L<perlunifaq> (the Perl Unicode FAQ), has been added
+(Juerd Waalboer).
+
 The long-existing feature of C</(?{...})/> regexps setting C<$_> and pos()
 is now documented.
 
@@ -840,8 +993,6 @@ the link count and update attributes that may have been changed through
 hard links. Setting ${^WIN32_SLOPPY_STAT} to a true value speeds up
 stat() by not performing this operation. (Jan Dubois)
 
-=back
-
 =head2 Regular expressions optimisations
 
 =over 4
@@ -918,6 +1069,19 @@ available.  When they are not available, perl's own version is used (from
 Russ Allbery's public domain implementation).  Various places in the perl
 interpreter now use them. (Steve Peters)
 
+=item C<d_pseudofork> and C<d_printf_format_null>
+
+A new configuration variable, available as C<$Config{d_pseudofork}> in
+the L<Config> module, has been added, to distinguish real fork() support
+from fake pseudofork used on Windows platforms.
+
+A new configuration variable, C<d_printf_format_null>, has been added, 
+to see if printf-like formats are allowed to be NULL.
+
+=item Configure help
+
+C<Configure -h> has been extended with the most commonly used options.
+
 =back
 
 =head2 Compilation improvements
@@ -937,14 +1101,23 @@ compilers and at least one C compiler internal error.
 
 =item Static build on Windows
 
-Perl extensions on Windows now can be statically built into the Perl DLL,
-thanks to a work by Vadim Konovalov.
+Perl extensions on Windows now can be statically built into the Perl DLL.
+
+Also, it's now possible to build a C<perl-static.exe> that doesn't depend
+on the Perl DLL on Win32. See the Win32 makefiles for details.
+(Vadim Konovalov)
 
 =item pport.h files
 
 All F<ppport.h> files in the XS modules bundled with perl are now
 autogenerated at build time. (Marcus Holland-Moritz)
 
+=item C++ compatibility
+
+Efforts have been made to make perl and the core XS modules compilable
+with various C++ compilers (although the situation is not perfect with
+some of the compilers on some of the platforms tested.)
+
 =item Building XS extensions on Windows
 
 Support for building XS extension modules with the free MinGW compiler has
@@ -956,6 +1129,14 @@ VC++ compiler. (ActiveState)
 Support for building perl with Microsoft's 64-bit compiler has been
 improved. (ActiveState)
 
+=item Visual C++
+
+Perl now can be compiled with Microsoft Visual C++ 2005.
+
+=item Win32 builds
+
+All win32 builds (MS-Win, WinCE) have been merged and cleaned up.
+
 =back
 
 =head2 Installation improvements
@@ -977,14 +1158,15 @@ information.
 Many improvements have been made towards making Perl work correctly on
 z/OS.
 
-Perl has been reported to work on DragonFlyBSD.
+Perl has been reported to work on DragonFlyBSD and MidnightBSD.
 
 The VMS port has been improved. See L<perlvms>.
 
-DynaLoader::dl_unload_file() now works on Windows.
+Support for Cray XT4 Catamount/Qk has been added.
 
-Portability of Perl on various recent compilers on Windows has been
-improved (Borland C++, Visual C++ 7.0).
+Vendor patches have been merged for RedHat and Gentoo.
+
+DynaLoader::dl_unload_file() now works on Windows.
 
 =head1 Selected Bug Fixes
 
@@ -1078,6 +1260,46 @@ setuid scripts and for scripts run with B<-T>.
 Moreover, with a thread-enabled perl, using C<PERLIO_DEBUG> could lead to
 an internal buffer overflow. This has been fixed.
 
+=item PerlIO::scalar and read-only scalars
+
+PerlIO::scalar will now prevent writing to read-only scalars. Moreover,
+seek() is now supported with PerlIO::scalar-based filehandles, the
+underlying string being zero-filled as needed. (Rafael, Jarkko Hietaniemi)
+
+=item study() and UTF-8
+
+study() never worked for UTF-8 strings, but could lead to false results.
+It's now a no-op on UTF-8 data. (Yves Orton)
+
+=item Critical signals
+
+The signals SIGILL, SIGBUS and SIGSEGV are now always delivered in an
+"unsafe" manner (contrary to other signals, that are deferred until the
+perl interpreter reaches a reasonably stable state; see
+L<perlipc/"Deferred Signals (Safe Signals)">). (Rafael)
+
+=item @INC-hook fix
+
+When a module or a file is loaded through an @INC-hook, and when this hook
+has set a filename entry in %INC, __FILE__ is now set for this module
+accordingly to the contents of that %INC entry. (Rafael)
+
+=item C<-t> switch fix
+
+The C<-w> and C<-t> switches can now be used together without messing
+up what categories of warnings are activated or not. (Rafael)
+
+=item Duping UTF-8 filehandles
+
+Duping a filehandle which has the C<:utf8> PerlIO layer set will now
+properly carry that layer on the duped filehandle. (Rafael)
+
+=item Localisation of hash elements
+
+Localizing an hash element whose key was given as a variable didn't work
+correctly if the variable was changed while the local() was in effect (as
+in C<local $h{$x}; ++$x>). (Bo Lindbergh)
+
 =back
 
 =head1 New or Changed Diagnostics
@@ -1128,6 +1350,13 @@ now gives a C<"our" variable %s redeclared> warning.
 These new warnings are now emitted when a dirhandle is used but is
 either closed or not really a dirhandle.
 
+=item Opening dirhandle/filehandle %s also as a file/directory
+
+Two deprecation warnings have been added: (Rafael)
+
+    Opening dirhandle %s also as a file
+    Opening filehandle %s also as a directory
+
 =item perl -V
 
 C<perl -V> has several improvements, making it more useable from shell
@@ -1206,6 +1435,16 @@ allow implementing lexical pragmas in pure perl.
 The inheritance hierarchy of C<B::> modules has changed; C<B::NV> now
 inherits from C<B::SV> (it used to inherit from C<B::IV>).
 
+=head2 Anonymous hash and array constructors
+
+The anonymous hash and array constructors now take 1 op in the optree
+instead of 3, now that pp_anonhash and pp_anonlist return a reference to
+an hash/array when the op is flagged with OPf_SPECIAL (Nicholas Clark).
+
+=for p5p XXX have we some docs on how to create regexp engine plugins, since that's now possible ? (perlreguts)
+
+=for p5p XXX new BIND SV type, #29544, #29642
+
 =head1 New Tests
 
 =head1 Known Problems