compatibility, you do not have to recompile your extensions, but you
might have symbol conflicts if you embed Perl in another application.
+=head2 New Opcode Module and Revised Safe Module
+
+A new Opcode module supports the creation, manipulation and
+application of opcode masks. The revised Safe module has a new API
+and is implemented using the new Opcode module. Please read the new
+Opcode and Safe documentation.
+
=head2 Internal Change: FileHandle Deprecated
Filehandles are now stored internally as type IO::Handle.
C<use IO::Handle> (or C<IO::Seekable> or C<IO::File>) and
C<*STDOUT{IO}> are the way of the future.
-=head2 Internal Change: Safe Module Absorbed into Opcode
-
-A new Opcode module subsumes 5.003's Safe module. The Safe
-interface is still available, so existing scripts should still
-work, but users are encouraged to read the new Opcode documentation.
-
=head2 Internal Change: PerlIO internal IO abstraction interface.
It is now possible to build Perl with AT&T's sfio IO package
=item use Module VERSION LIST
If the VERSION argument is present between Module and LIST, then the
-C<use> will fail if the $VERSION variable in package Module is
-less than VERSION.
+C<use> will call the VERSION method in class Module with the given
+version as an argument. The default VERSION method, inherited from
+the Universal class, croaks if the given version is larger than the
+value of the variable $Module::VERSION. (Note that there is not a
+comma after VERSION!)
-Note that there is not a comma after the version!
+This version-checking mechanism is similar to the one currently used
+in the Exporter module, but it is faster and can be used with modules
+that don't use the Exporter. It is the recommended method for new
+code.
=item prototype(FUNCTION)
=item VERSION( [NEED] )
-C<VERSION> returns the version number of the class (package). If the
-NEED argument is given then it will check that the current version is
-not less than NEED and die if this is not the case. This method is
-normally called as a class method. This method is also called when the
-C<VERSION> form of C<use> is used.
+C<VERSION> returns the version number of the class (package). If the
+NEED argument is given then it will check that the current version (as
+defined by the $VERSION variable in the given package) not less than
+NEED; it will die if this is not the case. This method is normally
+called as a class method. This method is called automatically by the
+C<VERSION> form of C<use>.
use A 1.2 qw(some imported subs);
-
- A->VERSION( 1.2 );
- $ref->is_instance(); # True
+ # implies:
+ A->VERSION(1.2);
=item class()
=item use ops
-Restricts unsafe operations when compiling.
+Disable unsafe opcodes, or any named opcodes, when compiling Perl code.
=back
User/grent.pm Object-oriented wrapper around CORE::getgr*
User/pwent.pm Object-oriented wrapper around CORE::getpw*
+ lib/Tie/RefHash.pm Base class for tied hashes with references as keys
+
UNIVERSAL.pm Base class for *ALL* classes
=head2 IO
even if you have 100 copies of the same hash, the immutable keys
never have to be re-allocated.
-Functions that do nothing but return a fixed value are now inlined.
+Functions that have an empty prototype and that do nothing but return
+a fixed value are now inlined (e.g. C<sub PI () { 3.14159 }>).
=head1 Documentation Changes
=over 4
-=item L<perli18n>
+=item L<perlnews>
-Internationalization.
+This document.
-=item L<perlapio>
+=item L<perllocale>
-Perl internal IO abstraction interface.
+Locale support (internationalization and localization).
=item L<perltoot>
Tutorial on Perl OO programming.
+=item L<perlapio>
+
+Perl internal IO abstraction interface.
+
=item L<perldebug>
Although not new, this has been massively updated.
from innumerable contributors, with kibitzing by more than a few Perl
porters.
-Last update:
-Wed Dec 18 16:18:27 EST 1996
+Last update: Tue Dec 24 16:45:14 EST 1996
projects / p5sagit/p5-mst-13.2.git / blobdiff