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-package vars;
-
-use 5.006;
-
-our $VERSION = '1.01';
-
-use warnings::register;
-use strict qw(vars subs);
-
-sub import {
- my $callpack = caller;
- my ($pack, @imports) = @_;
- my ($sym, $ch);
- foreach (@imports) {
- if (($ch, $sym) = /^([\$\@\%\*\&])(.+)/) {
- if ($sym =~ /\W/) {
- # time for a more-detailed check-up
- if ($sym =~ /^\w+[[{].*[]}]$/) {
- require Carp;
- Carp::croak("Can't declare individual elements of hash or array");
- } elsif (warnings::enabled() and length($sym) == 1 and $sym !~ tr/a-zA-Z//) {
- warnings::warn("No need to declare built-in vars");
- } elsif (($^H &= strict::bits('vars'))) {
- require Carp;
- Carp::croak("'$_' is not a valid variable name under strict vars");
- }
- }
- $sym = "${callpack}::$sym" unless $sym =~ /::/;
- *$sym =
- ( $ch eq "\$" ? \$$sym
- : $ch eq "\@" ? \@$sym
- : $ch eq "\%" ? \%$sym
- : $ch eq "\*" ? \*$sym
- : $ch eq "\&" ? \&$sym
- : do {
- require Carp;
- Carp::croak("'$_' is not a valid variable name");
- });
- } else {
- require Carp;
- Carp::croak("'$_' is not a valid variable name");
- }
- }
-};
-
-1;
-__END__
-
-=head1 NAME
-
-vars - Perl pragma to predeclare global variable names (obsolete)
-
-=head1 SYNOPSIS
-
- use vars qw($frob @mung %seen);
-
-=head1 DESCRIPTION
-
-NOTE: For variables in the current package, the functionality provided
-by this pragma has been superseded by C<our> declarations, available
-in Perl v5.6.0 or later. See L<perlfunc/our>.
-
-This will predeclare all the variables whose names are
-in the list, allowing you to use them under "use strict", and
-disabling any typo warnings.
-
-Unlike pragmas that affect the C<$^H> hints variable, the C<use vars> and
-C<use subs> declarations are not BLOCK-scoped. They are thus effective
-for the entire file in which they appear. You may not rescind such
-declarations with C<no vars> or C<no subs>.
-
-Packages such as the B<AutoLoader> and B<SelfLoader> that delay
-loading of subroutines within packages can create problems with
-package lexicals defined using C<my()>. While the B<vars> pragma
-cannot duplicate the effect of package lexicals (total transparency
-outside of the package), it can act as an acceptable substitute by
-pre-declaring global symbols, ensuring their availability to the
-later-loaded routines.
-
-See L<perlmodlib/Pragmatic Modules>.
-
-=cut