=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
Before Perl 5.004, C<AUTOLOAD> functions were looked up as methods
(using the C<@ISA> hierarchy), even when the function to be autoloaded
was called as a plain function (e.g. C<Foo::bar()>), not a method
-(e.g. C<Foo-E<gt>bar()> or C<$obj-E<gt>bar()>).
+(e.g. C<< Foo->bar() >> or C<< $obj->bar() >>).
Perl 5.005 will use method lookup only for methods' C<AUTOLOAD>s.
However, there is a significant base of existing code that may be using
The new restrictions when tainting include:
-=over
+=over 4
=item No glob() or <*>
=head2 New and changed syntax
-=over
+=over 4
=item $coderef->(PARAMS)
(possibly empty) parameter list. This syntax denotes a call of the
referenced subroutine, with the given parameters (if any).
-This new syntax follows the pattern of S<C<$hashref-E<gt>{FOO}>> and
-S<C<$aryref-E<gt>[$foo]>>: You may now write S<C<&$subref($foo)>> as
-S<C<$subref-E<gt>($foo)>>. All these arrow terms may be chained;
-thus, S<C<&{$table-E<gt>{FOO}}($bar)>> may now be written
-S<C<$table-E<gt>{FOO}-E<gt>($bar)>>.
+This new syntax follows the pattern of S<C<< $hashref->{FOO} >>> and
+S<C<< $aryref->[$foo] >>>: You may now write S<C<&$subref($foo)>> as
+S<C<< $subref->($foo) >>>. All these arrow terms may be chained;
+thus, S<C<< &{$table->{FOO}}($bar) >>> may now be written
+S<C<< $table->{FOO}->($bar) >>>.
=back
=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
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
(F) A carriage return character was found in the input. This is an
error, and not a warning, because carriage return characters can break
-multi-line strings, including here documents (e.g., C<print E<lt>E<lt>EOF;>).
+multi-line strings, including here documents (e.g., C<print <<EOF;>).
=item Illegal switch in PERL5OPT: %s
=item internal error: glob failed
(P) Something went wrong with the external program(s) used for C<glob>
-and C<E<lt>*.cE<gt>>. This may mean that your csh (C shell) is
+and C<< <*.c> >>. This may mean that your csh (C shell) is
broken. If so, you should change all of the csh-related variables in
config.sh: If you have tcsh, make the variables refer to it as if it
were csh (e.g. C<full_csh='/usr/bin/tcsh'>); otherwise, make them all
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