=head1 NAME
-perldelta - what's new for perl5.004
+perl5004delta - what's new for perl5.004
=head1 DESCRIPTION
C<%ENV = ()> and C<%ENV = @list> now work as expected (except on VMS
where it generates a fatal error).
-=head2 "Can't locate Foo.pm in @INC" error now lists @INC
+=head2 Change to "Can't locate Foo.pm in @INC" error
+
+The error "Can't locate Foo.pm in @INC" now lists the contents of @INC
+for easier debugging.
=head2 Compilation option: Binary compatibility with 5.003
conditions when taint checks are turned on. (Taint checks are used
in setuid or setgid scripts, or when explicitly turned on with the
C<-T> invocation option.) Although it's unlikely, this may cause a
-previously-working script to now fail -- which should be construed
-as a blessing, since that indicates a potentially-serious security
+previously-working script to now fail, which should be construed
+as a blessing since that indicates a potentially-serious security
hole was just plugged.
The new restrictions when tainting include:
-=over
+=over 4
=item No glob() or <*>
File handles are now stored internally as type IO::Handle. The
FileHandle module is still supported for backwards compatibility, but
-it is now merely a front end to the IO::* modules -- specifically,
+it is now merely a front end to the IO::* modules, specifically
IO::Handle, IO::Seekable, and IO::File. We suggest, but do not
require, that you use the IO::* modules in new code.
=head2 New and changed syntax
-=over
+=over 4
=item $coderef->(PARAMS)
=head2 New and changed builtin constants
-=over
+=over 4
=item __PACKAGE__
=head2 New and changed builtin variables
-=over
+=over 4
=item $^E
=head2 New and changed builtin functions
-=over
+=over 4
=item delete on slices
The C<UNIVERSAL> package automatically contains the following methods that
are inherited by all other classes:
-=over
+=over 4
=item isa(CLASS)
See L<perltie> for other kinds of tie()s.
-=over
+=over 4
=item TIEHANDLE classname, LIST
Three new compilation flags are recognized by malloc.c. (They have no
effect if perl is compiled with system malloc().)
-=over
+=over 4
=item -DPERL_EMERGENCY_SBRK
The resulting perl can be used under Windows 95 (if it
is installed in the same directory locations as it got installed
in Windows NT). This port includes support for perl extension
-building tools like L<MakeMaker> and L<h2xs>, so that many extensions
+building tools like L<ExtUtils::MakeMaker> and L<h2xs>, so that many extensions
available on the Comprehensive Perl Archive Network (CPAN) can now be
readily built under Windows NT. See http://www.perl.com/ for more
information on CPAN and F<README.win32> in the perl distribution for more
Six new pragmatic modules exist:
-=over
+=over 4
=item use autouse MODULE => qw(sub1 sub2 sub3)
When C<use locale> is in effect, the current LC_CTYPE locale is used
for regular expressions and case mapping; LC_COLLATE for string
-ordering; and LC_NUMERIC for numeric formating in printf and sprintf
+ordering; and LC_NUMERIC for numeric formatting in printf and sprintf
(but B<not> in print). LC_NUMERIC is always used in write, since
lexical scoping of formats is problematic at best.
There have been quite a few changes made to DB_File. Here are a few of
the highlights:
-=over
+=over 4
=item *
=head2 pod2html
-=over
+=over 4
=item Sends converted HTML to standard output
=head2 xsubpp
-=over
+=over 4
=item C<void> XSUBs now default to returning nothing
=head1 C Language API Changes
-=over
+=over 4
=item C<gv_fetchmethod> and C<perl_call_sv>
Many of the base and library pods were updated. These
new pods are included in section 1:
-=over
+=over 4
=item L<perldelta>
(X) A very fatal error (nontrappable).
(A) An alien error message (not generated by Perl).
-=over
+=over 4
=item "my" variable %s masks earlier declaration in same scope
(W) The pattern match (//), substitution (s///), and transliteration (tr///)
operators work on scalar values. If you apply one of them to an array
-or a hash, it will convert the array or hash to a scalar value -- the
-length of an array, or the population info of a hash -- and then work on
+or a hash, it will convert the array or hash to a scalar value (the
+length of an array or the population info of a hash) and then work on
that scalar value. This is probably not what you meant to do. See
L<perlfunc/grep> and L<perlfunc/map> for alternatives.
like a list when you assign to it, and provides a list context to its
subscript, which can do weird things if you're expecting only one subscript.
-=item Stub found while resolving method `%s' overloading `%s' in package `%s'
+=item Stub found while resolving method `%s' overloading `%s' in %s
(P) Overloading resolution over @ISA tree may be broken by importing stubs.
Stubs should never be implicitly created, but explicit calls to C<can>
If you find what you think is a bug, you might check the headers of
recently posted articles in the comp.lang.perl.misc newsgroup.
-There may also be information at http://www.perl.com/perl/, the Perl
+There may also be information at http://www.perl.com/perl/ , the Perl
Home Page.
If you believe you have an unreported bug, please run the B<perlbug>
https://perl5.git.perl.org / perl5.git / blobdiff